Cancer Translational Medicine

Review | Open Access

Vol.9 (2023) | Issue-3 | Page No: 122-137


Advancements in Immunotherapy for Advanced Gastric Cancer

Min Jiang1#, Rui Zheng1#, Ling Shao1, Ning Yao2, Zhengmao Lu1*


1. Department of Gastrointestinal Surgery, Shanghai Changhai Hospital, Naval Medical University, Shanghai 200433, China

2. Department of General Surgery, Joint Support Force 903th Hospital, Hangzhou 310013, China

# These authors contributed equally to this work

*Corresponding Author


Address for correspondence: 
Prof. Zhengmao Lu, Department of Gastrointestinal Surgery, Shanghai Changhai Hospital, Naval Medical University, No. 168 Changhai Road, Yangpu District, Shanghai 200433, China. E-mail:

Important Dates  

Date of Submission:   30-Jun-2023

Date of Acceptance:   14-Aug-2023

Date of Publication:   09-Oct-2023


Among all types of cancer, globally, stomach cancer is regarded as the fourth-leading cause of fatalities and among the five most common kinds of cancer overall. This article summarizes data and results of clinical trials conducted worldwide in recent years for the treatment of gastric cancer, focusing on immunotherapy for advanced cases of gastric cancer, including chimeric antigen receptor T-cell immunotherapy (CAR-T) and immune checkpoint inhibitors. The article selects several molecular loci and immune drugs with high international recognition and discussion, discusses the therapeutic effects of different targets of molecular therapies and the safety and efficacy of drug treatment in different modalities, and explores new directions for future gastric cancer treatment by comparing experimental data to prove the advantages of immunotherapy and the shortcomings that still exist. In addition, the article refers to the cancer genome atlas (TCGA) study report on molecular typing of gastric cancer in 2014 and the latest experimental data at home and abroad, introduces the relevant studies and controversies of microsatellite instability (MSI) typed gastric cancer and discusses the feasibility of future immunotherapy research for gastric cancer patients who meet the new typing treatment conditions.

Keywords: Gastric cancer; Immunotherapy; Adoptive cellular immunotherapy;Immune checkpoint inhibitors; Microsatellite instability


The fifth most prevalent cancer globally and the fourth leading cause of cancer mortality is gastric cancer, which includes stomach cancer and adenocarcinoma of the gastroesophageal junction.[Linkref 1-1945] Most Chinese stomach cancer patients are detected at the advanced stage of cancer and cannot be treated surgically.[Linkref 2-1946] Currently, most Chinese patients with advanced gastric cancer receive SOX (Tegafur and Oxaliplatin) or XELOX (Oxaliplatin and Capecitabine) chemotherapy regimens, but the overall patient response rate has not been shown to improve significantly.[Linkref 3-1947] The proposal and development of immunotherapy can provide a new treatment direction for patients with advanced gastric cancer, and the announcement of the new cancer genome atlas (TCGA) staging in 2014 suggests the feasibility of targeting gastric cancer lesions based on their unique molecular loci, thereby reducing treatment side effects.[Linkref 4-1948]

In recent years, numerous studies have demonstrated that, based on the unique molecular locations of gastric cancer lesions, inducing the body to produce an active or passive immune response to eliminate gastric cancer cells can improve the therapeutic effect and prognosis of patients on one hand, and reduce the toxicity of drugs and the harm caused by the treatment to the patient's body on the other.

Currently, immunotherapy for gastric cancer mainly includes: innate immunotherapeutics, tumor vaccines, adoptive cellular immunotherapies, monoclonal antibody therapies, and immune checkpoint inhibitors, among which adoptive cellular immunotherapies and immune checkpoint inhibitor therapies are the most researched and clinically effective [Figure 1].[Linkref 5-1949]

Figure 1.
Figure 1. Different types of immunotherapies in advanced gastric cancer. (Referring to Jin et al.)5

This article introduces immunotherapy for advanced gastric cancer through different sites of gastric cancer molecules and introduces the existing research results of gastric cancer with microsatellite instability (MSI).

The main types of immunotherapies includes CAR-T cell therapy, adoptive cell therapy, cancer vaccine, vascular endothelial growth factor (VEGF) inhibitor, immune checkpoint inhibitor like programmed cell death protein 1 (PD-1), programmed cell death-ligand 1 (PD-L1), T cell immunoglobulin domain and mucin domain-3 (TIM3), lymphocyte activation gene-3 (LAG3), CD28.


Adoptive cellular immunotherapy refers to the in vitro modification of the patient's immune cells to make them highly specific and capable of killing tumor cells. The modified cells are then infused back into the patient's body to stimulate the body's immune response and achieve the therapeutic goal. The main focus here being on specific immunotherapies, also known as chimeric antigen receptor T-cell immunotherapy (CAR-T).

In CAR-T treatment, the patient's T cells are separated and given the chimeric antigen receptor (CAR) and then reconstituted in vitro using genetic engineering techniques that allow the cells to simultaneously identify tumor cells and stimulate T lymphocytes [Figure 2].[6] CAR-T cells are developed before being reintroduced into the body, allowing the immune system to attack specific cells expressing the desired antigen, regardless of the major histocompatibility complex (MHC).[7]

Figure 2.
Figure 2. CAR-T cell therapy progress. (Referring to Domínguez-Prieto et al.)6

Four structural domains make up CAR domains: a spacer area, a transmembrane structural domain, an electrochemical structural region for signaling, and an extracellular structural domain for the identification of antigens. The latest CAR-T cells are now in their fifth generation.[8]

Universal CAR-T cells (UCAR-T) are the most recent CAR-T cells under investigation. The UCAR-T cells, as opposed to the earlier autologous CAR-T cells, have chosen to obtain T cells from a healthy population for gene editing. The advantages of this treatment are that the T cells are not impacted by the patient's physical condition and can be provided quickly, in large quantities, and at a significantly lower cost. In associated studies, some UCAR-T-treated patients saw improvements, but others experienced graft-versus-host disease (GVHD) and host-versus-graft reaction (HvGR). Researchers suggest using genetic approaches to alter or delete rejection-related genes like T cell receptor (TCR) and human leukocyte antigen (HLA) to resolve these problems and prevent GVHD or HvGR.[9]

Currently, the main targets of CAR-T therapy for gastric cancer include claudin18.2 (CLDN18.2), human epidermal growth factor receptor (HER-2), epithelial cell adhesion molecule (EpCAM), carcinoembryonic antigen (CEA), mucin1 (MUC1), mesothelin (MSLN), folate receptor 1 (FOLR1), etc. The most popular and researched targets are CLDN18.2, HER-2, EpCAM, CEA, and MUC1.

CLDN18.2 targets

Cellular tight junction protein 18.2 is expressed predominantly in epithelial cells, whose main function is to regulate endothelial barrier permeability. Since CLDN18.2 is overexpressed in 70% of primary and metastatic gastric cancers, inhibiting CLDN18.2 expression specifically is expected to be able to treat stomach cancer that has spread or progressed.[10]

Based on the identification of a single-stranded CLDN18.2 fragment of human origin, Jiang and colleagues developed CAR-T cells in 2019 using the hu8E5 or hu8E5-2I target type. Following medical care, further investigations revealed incomplete or total tumor eradication in a gastric cancer model with patient-derived tumor xenograft (PDX) that was CLDN18.2 positive. What’s more, CAR-T cells could persist and effectively infiltrate into tumor cells in mice while it was found that mice did not exhibit significant detrimental effects on their normal organs, including their gastric tissue. The results demonstrate that the therapy has a good safety profile.[11]

The results of research using CAR-T cells directed against CLDN18.2 (CT041) to treat advanced cancer patients are orally reported in the European Society of Medical Oncology (ESMO) Congress 2021.[12] The 28 late gastric/oesophageal junction cancer patients had an objective response rate (ORR) of 57.1%, 18 of whom had received at least a second-line treatment before the trial. The disease control rate (DCR) for these 18 patients was 83.3%, with an ORR of 61.1%. According to the study's findings, CT041 has a strong clinical track record for treating patients with late gastrointestinal and oesophageal cancer.[13]

An interim study of CT041 published by Qi et al. in 2022 (NCT03874897) provided initial results. The trial recruited patients with CLDN18.2-positive gastrointestinal tumors who had received other treatments, then re-treated them with CLDN18.2-targeted CAR-T cells (CT041). Overall, grade 3 or higher hematologic toxicity was observed in all patients, but no patient experienced neurotoxicity, cytokine release syndrome of level 3 or greater, treatment-related mortality, or dose-limiting toxicity. Patients had an ORR of 48.6%, a DCR of 73.0%, and a 6-month remission rate of 44.8%. In these investigations, stomach cancer patients had a 6-month overall survival rate of 81.2% and ORR and DCR were 57.1% and 75.0%, respectively.[14] The findings of this trial demonstrate that CT041 is an effective and secure therapeutic option for CLDN18+ people with gastric cancer who have previously had rigorous therapy.

Clinical investigations targeting CAR-T cells with CLDN18.2 are still ongoing, and together with published experimental data, CLDN18.2 is a potential target for CAR-T treatments, which might lead to substantial advancements in CAR-T therapy research.

HER-2 targets

The epidermal growth factor receptor (EGFR) family of proteins includes the transmembrane protein HER-2, which has tyrosine-protein kinase activity. HER-2 overexpression stimulates many signaling pathways that promote the growth of cells and tumor development. Although HER-2 is infrequently seen in ordinary human tissues, it is overexpressed in several cancers and can be used as an indicator to predict a patient's prognosis.[10]

The ScFV and HER-2 monoclonal antibodies with a hinge region that selectively identifies and binds tumor-associated cell antigens (TAA) make up the extracellular antigen-binding region of HER-2. HER-2 on the tumor surface can also bind to IL-13R2 on the cell barrier via CAR-T cells, further increasing CAR-T cell activity and functionality.

Most HER-2-aimed CAR-T cell trials for stomach cancer are now in the pre-clinical stage. While studies show that HER-2-focused CAR-T treatment is effective for treating late gastric cancer, the treatment's safety has not yet been established. For instance, Song et al. used a lentiviral carrier to transfect CD137-anti-HER2ScFV into cells and discovered the CAR-T cells had significant and robust anticancer activity in vivo against patient-derived basic gastric cancer cells and HER-2-positive gastric cancer embryonic cells and eliminating HER-2-positive gastric cancer cells in vitro.[15]

Although additional research is required to validate the medication's safety, CAR-T has so far demonstrated tentative effectiveness in patients with HER-2-positive gastric cancer.

EpCAM targets

Many distinct epithelial cells and the majority of malignant tumor cells contain the extracellular protein EpCAM, additionally referred to as CD326, on their surfaces, which affects cell signaling, proliferation, differentiation, and migration. More than 90% of people with stomach cancer have elevated levels of EpCAM, which are evenly expressed on the tumor cells' whole surface.[8] EpCAM could be a unique target for CAR-T based on a number of its properties. Additionally, it has been demonstrated that EpCAM expression levels may be utilized to gauge and track the development and prognosis of tumors.

CAR-T cell therapy targeting EpCAM in patients with diverse EpCAM-positive tumors is being evaluated for safety and efficacy in three large clinical trials (NCT02725125, NCT03013712, and NCT03563326).

At the 2022 ESMO Annual Meeting, Prof. Weijia Fang shared a study on CAR-T therapy targeting EpCAM for advanced gastric and colorectal cancers. The research included eight EpCAM-positive patients having advanced gastrointestinal tumors with one or more target lesions, among which there were four gastric cancers and four colorectal cancers. Among all the patients enrolled, 6 were given a medium-low dose and 2 received a high dose.

The results of the study showed that dose limited toxicity (DLT) and immune effector cell-associated neurotoxicity syndrome (ICANS) did not appear in any one of these patients, and the most common Grade III and higher adverse reactions were haematotoxic effects, including reduced lymphocyte, white blood cell, and platelet counts. One stomach cancer patient had a grade 1-2 cytokine storm (CRS) and one patient with gastric cancer had a grade 3 CRS following the infusion. Both of them returned to normal after treatment.

In terms of efficacy, the disease control rate of the eight patients achieved 75% disease control, one patient had more than 30% tumor regression, experienced partial remission (PR), and had stable disease status for 32 weeks. After days 7-28 of reinfusion, circulating tumor cell (CTC) counts in the patients' blood decreased and cytokine levels increased significantly in all patients.[16]

In ASCO 2023, researchers presented the latest data from the study with the trial newly enrolling 6 patients with gastric cancer. Of all patients, 2 with PR were seen in the low and medium dose groups and 1 patient with PR underwent successful radical gastric cancer surgery after 28 weeks of treatment while all of the patients in the group were well tolerated. There were 2 patients with DLT in the high-dose group, but no ICANS were observed in any of them.

The apparent effectiveness and tolerability of CAR-T therapy targeting EpCAM indicate that EPCAM is a promising new target for advanced gastric cancer.

CAR-T cells with dual chimeric antigen receptors

Given the specificity of CLDN18.2 and HER-2 in gastric cancer expression, in 2022, Meng et al. created the cell CHbbz, which is directed against both HER-2 and CLDN18.2, using a lentiviral infection method. The purpose is to investigate its efficacy against advanced gastric cancer and its effect on off-target effects. The results showed that CHbbz had specific dose-dependent killing activity against CLDN18.2+ HER-2+ tumor cells in vitro (P<0.001); In a nude mouse xenograft model inoculated with CH-AGS, only CHbbz produced in vivo tumor suppressive activity with tumor cells and tumor infiltration of T cells (P<0.001). In addition, CHbbz was produced only against tumor cells carrying both CLDN18.2+ HER-2+ and tumor-killing potential (P<0.001).[17] The trial confirmed the effectiveness of the cells with dual chimeric antigen receptors for the curative use of positive gastric cancer patients, while the dual chimeric CAR-T cells also produced killing activity only on dual positive tumor cells, reducing the damage to normal tissue cells and decreasing the incidence of off-target effects.

Problems with CAR-T treatment

While novel CAR-T therapeutic targets are developing and the technology is constantly evolving, the problems that arise during the treatment process cannot be ignored. For example, the treatment is limited by the tumor microenvironment (TME), prone to off-target effects, and a series of adverse effects such as cytokine storm brought about by the treatment.


TME is a microenvironment that cancer cells change to encourage cancer cells to develop and consists mainly of inflammatory cells, fibroblasts, and cytokines. Unlike blood tumors where T cells can easily reach their targets, solid tumors exist deep within the body and are unconducive for T cells to transit and infiltrate. On one hand, the extracellular matrix, of which tumor-associated fibroblasts are a major component, and the structurally irregular tumor vasculature, together form a physical barrier that prevents CAR-T cells from homing and infiltrating.[18] On the other hand, tumor cells, tumor stromal cells, and tumor-associated immune cells in TME secret chemokines while the chemokines bind to their corresponding receptors and attract immune cells, which could promote or inhibit tumor growth. In contrast, CAR-T cells lack receptors on their surface that match tumor-secreted chemokines, resulting in their poor homing ability to tumors.[19],[20]

The tumor microenvironment also contains various immunosuppressive factors, such as prostaglandin E2 (PGE2), transforming growth factor-β (TGF-β), interleukin6 (IL6), and IL10. It can prevent the activation of T cells and tumor cell death. In addition, the microenvironment contains immune-suppressive cells including T cells with regulatory function (Treg) and suppression cells derived from myeloid-derived suppressor cells (MDCS), which release chemicals like Arg-1 and reactive oxygen species (ROS), limiting the CAR-T cells’ ability to destroy cancerous cells.[21]

By controlling inhibitory cell surface receptors such as programmed death ligands through tumor-negative regulatory systems, tumor cells can also suppress cellular function; the gluconeogenesis of tumor cells leads to hypoxia, low pH, and nutrient deprivation in the tumor microenvironment, which is also detrimental to CAR-T cell survival.[22]

It has been discovered that increasing CAR-T cell activity can overcome the cancer microenvironment's therapeutic limitations, as by adding functional chemokine receptors to CAR-T cells to improve T cell targeting and penetration into solid tumors.[23] To increase the anti-cancer efficacy, target CAF, activate CAF-CAR-T cells, and alter T cells such that they co-express a variety of immunostimulatory factors and in vivo persistence of CAR-T cells. Engineer CAR-T cells to bind PD-L1ScFV antibody sequences by using monoclonal antibody and gene editing technologies to improve their tumor-specific recognition ability.[24] CAR-T cells are combined with immune checkpoint inhibitors in a therapy known as combined blockade of immune checkpoint PD-1 therapy to prevent the body's T-cells from being suppressed and to increase the anticancer benefits of CAR-T cells [Figure 3]. The approach is currently being used to treat various solid tumors including neuroblastoma and ovarian cancer, and has a high potential for clinical application.[25],[26],[27]

Figure 3.
Figure 3. Diagrammatic review of the TME's immunosuppressive cells and molecules, anti-immunosuppression processes, and immunotherapeutic approaches to combat immunosuppression. (Referring to Balta et al.)27 The innermost (orange area) are tumor cells and different types of immunosuppressive immune cells in the TME, which include tumor-associated macrophage (TAM), tumor-associated neutrophile (TAN), MDSC, Treg and regulatory B cell (Breg). The outer circle (red area) is the immunosuppressive molecules. This region includes TGF-β, ROS, IL-10, IDO1, arginase, and adenosine. And then the blue area outside indicates the mechanism of inhibition on tumor-fighting immune cells like CD4+ T cells, CD8+ T cells, and NK cells. The outermost gray area lists the latest immunotherapeutic strategies corresponding to the different mechanisms.


Off-target effects

CAR-T treatment carries significant risks, in particular side effects. Targets selected for CAR-T therapy, such as HER-2, are also expressed in normal cells, whereas tumor cells have no specific target. As a result, CAR-T cells not only kill tumor cells but also damage normal organs, tissues, and cells to varying degrees.[28] The ideal target antigen is TSA, which is expressed only on the surface of tumor cells and can’t be found on normal cells. The success of hematologic oncology CAR-T therapy is due to the specific antibodies that appear only at the tumor site. However gastric cancer lacks the specific antigen that appears only on tumor cells.

Dual chimeric reeptors were developed by the researchers to limit the ability of CAR-T cells to target two antigens present on tumor cells at once. This limitation prevents CAR-T cells from fully activating until they bind to both targets simultaneously. This lessened side effects and increased the limitation of CAR-T cell attachment to tumor cells.[17] However, this method applies only to patients with tumors expressing two molecular loci at the same time and is more restrictive. Tandem CAR-T is similarly being investigated. This type of CAR-T cell connects two targets in tandem, which provides a better role in tumor killing and preventing tumor escape than parallel CAR-T [Figure 4].[29]

Figure 4.
Figure 4. Combined CARs, Dual-singling CAR, and Tandem CAR. (A) Simultaneous or sequential use of 2 or more different CAR-T cells; (B) Two distinct CARs are expressed simultaneously and separately on a comparable T cell surface; (C) Two distinct scFvs join and create CARs simultaneously. (Referring to Miao et al.) 29

Cytokine storm (CRS)

CRS, which is also known as cytokine release syndrome, is the most severe side effect that may be caused by CAR-T cells infused back into patients, usually occurring 6-20 days after treatment.[30] When activated by binding to the target antigen, CAR-T cells clear the corresponding tumor cells and stimulate the body's immune system through a dual intracellular signaling domain-co-stimulatory molecule signal, which stimulates the cells to release large amounts of inflammatory factors, such as IFNγ, TNF-α, interleukins. Eventually, the cytokines induce an inflammatory response, activate the immune system, and damage the body's tissues and organs. Severe cytokine storms can even induce respiratory failure, fever, tachycardia, and capillary infiltration syndrome, which can be life-threatening to patients.[31]

The amount of activated CAR-T cells, target antigen density, and the patient's tumor burden all influence how severe CRS is. CRS can be classified into 5 grades according to the severity of the body's response, with grade 3 and above being considered severe CRS, which can be life-threatening and requires close attention and timely intervention. Interleukins (IL-6,10,13), TNF-α, and C-reactive protein are currently considered to be used to predict the severity of CRS.

CAR-T therapy as a novel therapeutic approach has shown greater potential and clinical application in recent experimental studies, and the proposal of new targets such as HER-2 and CLDN-18.2 has also pushed CAR-T therapy towards a new process. However, due to uncontrollable factors such as high treatment costs and small patient samples, currently, the application of CAR-T therapies is limited to clinical trials, while factors such as tumor microenvironment and the broad use of CAR-T treatments are also constrained by cytokine burden. Therefore, there are still many difficulties to be discovered and overcome before CAR-T therapies are truly used in the clinic.


The immunosuppressive molecule PD-1 also referred to as CD279, is primarily expressed in various immune cells. In 1992, PD-1 expression was first detected in apoptotic T cells by Ishida.[32] In 1999, Dong et al. identified and reported the T-cell regulatory function of human B7-H1 and its involvement in tumor immune escape.[33],[34] Subsequently, in 2000, Freeman et al. demonstrated an interaction and interconnection between B7-H1 and PD-1.[35] After this, as the interaction between them continued to be demonstrated, B7-H1 was named PD-L1 and the pathways of action and biological activities between the two were gradually elucidated and formally applied in tumor research.

PD-1 currently has two ligands, PD-L1 and PD-L2, which are structurally similar. However, PD-L1 can be widely expressed on T cells, B cells, dendritic cells, monocytes, macrophages, various tumor cells, and some lymph node tissues. PD-L2 expression is relatively limited and PD-L1 is typically regarded as the primary ligand of PD-1.[36] Inhibiting T cell proliferation and differentiation while promoting T cell death are all effects of the interaction between PD-1 and PD-L1.[37]

Gastric cancer evades the killing effect by modulating immune checkpoints. According to available research results, PD-L1 expression levels are closely associated with gastric cancer screening, tumor staging, differentiation and patient prognosis, and activation of the PD-1/PD-L1 pathway has been linked to decreased cytotoxic T lymphocyte (CTL) activity, despite the fact that the exact mechanisms are yet unknown. Immune checkpoint drugs like nivolumab and pembrolizumab, that target the PD-1 pathway, have shown promising results in treating patients with late combined gastroesophageal adenocarcinoma. Immune checkpoint drugs prevent inhibitory signaling between T cells and tumor cells by binding to the corresponding target, which protects the differentiation of T cells and promotes body immunity [Figure 5].[29]

Figure 5.
Figure 5. Immune checkpoints and immune checkpoint inhibitors. (Referring to Miao et al.) 29 (A) Prior to administration, the immune checkpoints PD-1, B and T lymphocyte attenuator (BTLA), and TIM3 on T cells can respectively bind to the corresponding ligands PD-L1/PD-L2, herpes virus entry mediator (HVEM) and galectin-9 (Gal-9) on tumor cells, leading to inhibitory signals from the tumor cells to the T cells and inhibiting T cell activation; (B) With the use of immune checkpoint inhibitor drugs, the drugs can bind to targets specific to the surface of T cells or tumor cells, thereby preventing tumor cells from interfering with T cell activation by generating inhibitory signals to the T cells.


In 2018, findings of the phase III clinical trial (NCT02267343) for advanced stomach cancer based on the ATTRACTION-02 research, investigating the safety and efficacy of the PD-1 checkpoint inhibitor nivolumab in patients with incurable advanced or recurrent gastric/gastrointestinal adenocarcinoma in Asian countries, were announced at the ESMO Congress. After two years of follow-up surveys, it was evident that patients receiving nivolumab treatment had better overall survival than those receiving placebo treatment. Nivolumab-treated patients' median overall survival (mOS) was 5.26 months compared to 4.14 months for placebo-treated patients [hazard ratio (HR)=0.63, 95% confidence interval (CI): 0.51-0.78, P<0.0001].[38] In patients who have undergone treatment, nivolumab was reported to have a superior therapeutic impact and has the potential to transform into a new clinical treatment agent.

Subsequently, with the joint promotion of multiple research results, in March 2020, the National Medical Products Administration (NMPA) formally consented to utilize nivolumab monotherapy as the third-line chemotherapy for gastric cancer. In China, nivolumab was also the first immunotherapy medicine to be approved for the treatment of stomach cancer. The Guidelines for the Diagnosis and Treatment of Gastric Cancer, issued in 2022, also recommend nivolumab as a Class I treatment for advanced metastatic gastric cancer in the third line of therapy.[39]

Similar to nivolumab, the clinical trial KEYNOTE-059 examined pembrolizumab's efficacy in patients who had previously been treated and were diagnosed with advanced cancer of the gastroesophageal junction. The trial selected patients underwent at least two different treatments and both of them were unsuccessful, and the results showed that in those subjects who were PD-L1 positive and had a positive score CPS ≥1, pembrolizumab attained an ORR of 12%, and the median overall survival was 5.8 months.[40]

The results showed that in patients with advanced gastroesophageal junction adenocarcinoma who had been treated with at least two different regimens before, pembrolizumab had better results against the tumor and the drug had a longer duration of remission, better overall outcomes, and a satisfactory patient prognosis. Therefore, for patients with PD-L1 CPS ≥1, as a third-line therapy, pembrolizumab monotherapy has been authorized. In addition, in the 2022 edition of the Chinese Society of Clinical Oncology (CSCO) Guidelines, as a Tier 3 recommended agent for the first-line treatment of patients with this kind of cancer, pembrolizumab monotherapy is included.[39]

As a third-line therapy for advanced gastric cancer, PD-1 immune checkpoint inhibitors are not a mainstream choice in clinical gastric cancer treatment. Meanwhile, studies have proven that the therapeutic effect achieved with immune checkpoint inhibitors alone is much lower than expected, therefore, in the current clinical practice treatment, there is a preference for combining immune checkpoint inhibitors with other drugs or therapies.

Single-agent combined chemotherapy

Currently, the combination of PD-1 monoclonal antibody and first-line chemotherapy is the most commonly used regimen for multi-protocol combination therapy.

The Checkmate-649 trial compared chemotherapy alone with nivolumab in conjunction with chemotherapy [FOLFOX (Oxaliplatin, Calcium Folinate, and Fluorouracil) or XELOX] in order to assess the effectiveness and security of this treatment. Among all patients with PD-L1 CPS ≥5, the median OS in the combination therapy group was 14.4 months versus 11.1 months in the chemotherapy alone group (HR=0.71, P<0.0001), according to data presented by the researchers at the ESMO 2021 meeting. More importantly, comparing the progression-free survival (PFS) data, nivolumab with chemotherapy was found to work better together, improving both the PFS benefit and the overall outcome.[41] Therefore, starting in 2021, Nivolumab in conjunction with FOLFOX/XELOX for two years straight is recommended by the CSCO recommendations as the first-line therapeutic choice for patients with advanced gastric cancer who are HER-2 negative and have a PD-L1 CPS of at least 5.[39]

At the 2023 American Society of Clinical Oncology (ASCO) GI meeting, researchers updated three-year follow-up data for the global population and Chinese subgroup of subjects in the Checkmate-649 trial. A total of 1,581 subjects were selected for the trial with at least 36 months of follow-up, and the results demonstrated that both the PD-L1 CPS-5 group and all randomized patients benefited in terms of OS and PFS improvements when nivolumab was used in conjunction with chemotherapy regimens. In the PD-L1 CPS-5 group, the ORR was 60% (vs. 45%) with a median duration of response (mDOR) of 9.6 months (vs. 7.0 months) in the nivolumab combination treatment group compared to the chemotherapy group. While among all randomized patients, the nivolumab combination therapy group had an ORR of 58% (vs. 46%) and a median DOR of 8.5 months (vs. 6.9 months) compared with the chemotherapy group.[42] Therefore, it can be found that nivolumab combination therapy showed a better treatment effect in both the PD-L1 CPS≥5 group and in randomized patients. It means that nivolumab combination therapy had a therapeutic advantage in the whole population of HER-2 negative patients.

 For the clinical treatment of cancer, the KEYNOTE-062 study was a phase III clinical trial that compared the various treatment outcomes of two regimens that is pembrolizumab in conjunction with chemotherapy against chemotherapy alone. According to the 2022 ASCO GI conference, individuals with CPS at least 1 level had a 2-year OS of 24.5% and a median PFS of 6.9 months in the pembrolizumab combination chemotherapy group compared to 18.8% and 6.5 months in the chemotherapy alone arm (HR=0.84, 95%CI: 0.70-1.01). Additionally, in patients with CPS more than 10, the median PFS was 5.8 months and 6.2 months, respectively, with a 2-year OS of 28.3% and 21.1% in the groups receiving combination therapy and chemotherapy alone (HR=0.71, 95%CI: 0.52-0.96).[43] Contrary to chemotherapy given alone, combined treatment did not significantly increase patients' chances of survival in cases of stomach cancer.

In 2023, at the ESMO meeting, Merck Sharp & Co. presented detailed data from the Keynote-859 trial, a new trial also studying pembrolizumab in combination with a chemotherapy regimen like Keynote-062. The difference against Keynote-062 is that the new trial Keynote-859 changed the chemotherapy agent to an oxaliplatin-based regimen. They enrolled 1,579 individuals, with a 31-month median follow-up period. The trial's findings revealed that, compared to the placebo group receiving combination chemotherapy, the pembrolizumab arm's mOS was 12.9 months (vs. 11.5 months), median PFS of 6.9 months (vs. 5.6 months), ORR of 51.3% (vs. 42.0%) (P=0.00009), and median DOR of 8.0 months (vs. 5.7 months). In addition to this, there were 785 grade 3-5 treatment-related adverse events in the pembrolizumab combination therapy group (59.4%) and 787 in the placebo group (51.1%), with approximately 1.0% and 2.0% of patients, respectively, dying from treatment-related adverse events.[44] This trial showed significant results when pembrolizumab was used in combination with chemotherapy and other approaches, illustrating the potential of pembrolizumab for the development of clinical combination therapy, and further studies on pembrolizumab can be expected in the future.

Clinical data from the Orient-16 trial were presented at the ESMO Congress in 2021. The median PFS and median OS for the sintilimab and chemotherapy (XELOX) versus chemotherapy alone arms, respectively, were 7.1 months vs. 5.7 months (HR=0.0636, P<0.0001), and 18.4 months vs. 12.3 months (HR=0.766, P=0.0090).[45] Data show that sintilimab has a substantial therapeutic impact on gastric cancer when combined with chemotherapy. For patients with advanced gastric cancer who are HER-2 negative and have a PD-L1 CPS≥5, sintilimab in conjunction with chemotherapy (FOLFOX/XELOX) was successfully included in the CSCO recommendations' 2022 edition.[39]

The efficacy of immune drugs was shown in several of the big studies mentioned above by combining them with chemotherapy vs. chemotherapy alone. In terms of clinical use, immunotherapy and chemotherapy combined with immune checkpoint inhibitors like PD-1 immune checkpoint inhibitor are the most frequent therapies for advanced gastric cancer. However, PD-1 immunosuppressants are restrictive and selective for patients, and some patients who do not meet the conditions cannot use them. Therefore, in the subsequent research, more exploration is needed to discover other immune checkpoints besides PD-1, such as CTLA4, to reduce the restriction of treatment and provide more options for patients' treatment.

Dual immunotherapy combined with chemotherapy

At the 2022 ASCO GI meeting, the findings of a phase II clinical trial using the immunosuppressant candonilimab (AK104), which target PD-1 and CTLA-4, combined with chemotherapy (XELOX) as the first-line therapy for locally advanced adenocarcinoma that is unresectable, were released. AK104 patients had an ORR of 68.1%, a DCR of 92.3%, and a mOS of 17.41 months (95% CI: 12.35 to NE), according to study data. However, in the nivolumab combination therapy group, the average mOS for the people was just 13.8 months, and a comparison between the two can clearly reveal better data in the AK104 group, indicating that AK104 has a better prognostic improvement, longer patient survival and better overall treatment effect.[46]

According to studies on drug safety, approximately 62.5% of patients in the AK104 combination chemotherapy treatment group experienced at least grade 3 treatment-related adverse events (TRAES). Compared to the 60.0% TRAES rate in the single-agent immune combination trial Checkmate-649 and the 59.8% TRAES rate in the Orient-16 trial,  the AK104 combination treatment group adverse reactions occurrence probability was slightly greater. Among them, in terms of TRAES that may lead to discontinuation, the incidence rate in the AK104 combination group was 6.3%, compared with 38.0% and 11.6% in the Checkmate-649 and Orient-16 studies, respectively, and the incidence rate of AK104 was significantly lower, indicating that the probability of adverse reactions leading to discontinuation of AK104 was lower, and the safety of AK104 can be assured.[46]

Also targeting two specific targets for treatment, a related drug study of the dual immune combination trial Checkmate-649 was forced to discontinue the trial due to severe adverse effects in patients treated with the combination of nivolumab and ipilimumab. In contrast, the bispecific antibody drug AK104, which has fewer adverse effects and a higher safety profile, has become a focus for further development of immunotherapy in the future, and a phase III clinical study on AK104 combination therapy (NCT05008783) is currently underway.

Recently, a hospital also reported the outcome of a case of AK104 for an advanced gastric adenocarcinoma patient who was HER-2 (1+) with liver and lung metastases. The patient achieved complete remission (CR) after treatment while the adverse effects such as grade 1-2 hematological toxicity and infusion reactions were experienced during treatment. But the toxicities were significantly milder compared to the combination of PD-1 inhibitors with CTLA-4 inhibitors, and the overall safety of treatment was satisfactory.[47]

The results of the available studies indicate that dual-targeted antibody inhibitor immunotherapy is more effective than single immunotherapy for gastric cancer, while the safety profile is higher than that of dual single immunosuppressant combination, and the overall treatment safety and possible adverse reaction rates are within acceptable limits, making dual antibody immunosuppressants of higher clinical value and research potential. However, the specific dose and target population selection for the clinical application of the drug remains to be studied.


Overview of MSI

Microsatellites (MS) refer to certain short tandem repeats (1-6 nucleotides) scattered throughout the human genome that are more prone to mutation, with a mutation rate of 10-7-10-3 per generation. The MMR system is involved in the identification and repair of mismatched bases generated during DNA replication or genetic recombination. When the MMR system is defective, mismatched base pairs created during DNA replication are not repaired in a timely manner, which in turn causes mutations in genes, resulting in microsatellites becoming less stable and further leading to the deletion of the associated expressed proteins.

MSI-type gastric cancer is thought to affect 8% to 25% of all stomach cancer patients globally, however survey data from different countries and studies vary.[48] There are many reasons for the differences between study data, and it is currently believed that the most influential are geographical differences between samples, differences in gastric cancer staging among investigated individuals, and differences in the detection methods used by different research institutions.

MSI prognostic marker controversy

In a meta-analysis, Polom et al. screened 48 studies from multiple databases including PubMed, Cochrane and Ovid up to 2016 and found an overall survival risk ratio of 0.69 (HR=0.69, CI: 0.56-0.86, P<0.001). Based on a study of 21 of these trials, it was found that MSI patients had a relatively better prognosis than patients without MSI.[49] And in a 2017 post hoc analysis report about the MAGIC trial, it was shown that among those gastric cancer patients who received only surgery, those with MSI-H fraction had better treatment and prognosis outcomes relative to subjects with MSS/MSI-L fraction, but the data analysis revealed no statistically significant difference in efficacy between the two groups (HR=0.35, CI: 0.11-1.11, P=0.08); the non-MSI-H group had a better prognosis in patients who received both surgical treatment and chemotherapy.[50]

For the time being, MSI cannot be properly employed as a predictive biomarker for stomach cancer due to the retrospective nature of the majority of existing research, which lack timeliness, and the small sample size included in the study, which lacks representativeness and reliability. More significantly, research has demonstrated that a number of variables, including the tumor stage and adjuvant treatment, may have an impact on the prognosis of MSI-type gastric cancer.

Clinical management of MSI gastric cancer

Chemotherapy sensitivity controversy of MSI-H gastric cancer

In a post hoc evaluation of the MAGIC experiment from 2017, Smyth randomized gastric cancer patients into two groups, one receiving surgery alone and the other receiving adjuvant chemotherapy in the perioperative period. Comparing the experimental data from the two groups, it was shown that patients in the surgery-only group had better treatment-related prognostic indicators, suggesting that adjuvant chemotherapy offered no improvement in the recovery of patients with MSI-H gastric cancer.[51] The 5-year disease-free survival rate for patients with MSI gastric cancer was 85.7% in the surgery alone group and 83.9% in the surgery combined with chemotherapy group, according to a post hoc analysis of the CLASSIC trial in 2019. There was no significant difference between the two data sets, suggesting that chemotherapy was not effective in improving the prognosis of patients undergoing surgery.[52] Polom et al. compiled data from four large clinical trials (MAGIC, CLASSIC, ARTIST and ITACA-S) related to the perioperative treatment of patients with MSI-type gastric cancer and performed a meta-analysis of these data. According to the findings, patients in the surgery-alone group with MSI-H staging had superior 5-year disease-free survival rates and longer overall survival times than those with MSS/MSI-L gastric cancer. However, this result was the opposite in the group that underwent both surgery and chemotherapy, and subjects with non-MSI-H fraction in the combined treatment group had significantly better outcome and prognosis.[52]

However, in a recent Korean study with locally progressive MSI-H gastric cancer, researchers made a different finding, showing that among MSI-H gastric cancer patients, subjects who received postoperative adjuvant chemotherapy with 5-fluorouracil had higher 5-year survival rates (94.8% vs. 78.3%, P=0.022) and 5-year disease-free survival rates (87.0% vs. 72.9%, P=0.044) than the surgery-alone group.[53] The results of this trial suggest that postoperative adjuvant chemotherapy has a greater impact on MSI-H patients with locally progressive gastric cancer, and patients benefit more from it.

Since most of the current studies on MSI are retrospective and lack timeliness, and most meta-analyses lack sufficient sample data, the results obtained are not representative of the majority of the population, and the results obtained from different studies even appear to be contradictory. There is no clear conclusion about the sensitivity of MSI-H gastric cancer to chemotherapy and whether MSI-H gastric cancer patients can benefit from chemotherapy.

Immunotherapy for MSI gastric cancer

Immunotherapy is now a popular research component in the field of oncology treatment, and clinics are encouraging the use of different targeted agents for patients with different molecular subtypes of gastric cancer to achieve specific treatment. Currently, only a few gastric cancer patients can benefit from specific immunotherapy, therefore, it is crucial to determine which types of cancer patients can benefit from immunotherapy. Research on immunotherapy for MSI-H gastric cancer continues, with most studies currently focusing on advanced gastric cancer, mainly due to the fact that most individuals with stomach cancer are already in an advanced stage when they are detected.

 Keynote-059 is a phase III clinical trial that enrolled patients with metastatic gastric/gastroesophageal union cancer who failed second-line chemotherapy and treated them with pembrolizumab. The final data showed that the MSI-H group achieved an ORR of 57.1% and a DCR of 71.4% in all subjects, while the corresponding figures for the non-MSI-H group were only 9.0% and 22.2%. By comparison, it was evident that the MSI-H group had significant therapeutic and prognostic effects relative to the non-MSI-H group, indicating that patients with MSI-H typing have higher drug sensitivity to immunotherapy.[54] Similarly, the final results of Keynote-158, a phase II multicohort trial, showed more favorable treatment outcomes after treatment with pembrolizumab in certain gastric cancer patients who did not respond to chemotherapy.[55] Related similar studies include the Keynote-061 and Keynote-062 trials, in which Keynote-061 aimed to compare the effect of pembrolizumab with paclitaxel and found that the ORR in the pembrolizumab group was 46.7%, while the other group was only 16.7%, and comparing the data of the two groups, it can be concluded that pembrolizumab immunotherapy has a better therapeutic effect and clinical performance relative to the chemotherapy approach.[56]

And the Keynote-062 trial focused on comparing and studying the difference in efficacy between monotherapy with pembrolizumab and combination therapy with chemotherapy. The results showed that in patients with MSI-H gastric cancer, the ORR was 57.1% in the monotherapy group, 64.7% in the combination therapy group, and 36.8% in the chemotherapy alone group. It was obvious that the combination therapy group had the best efficacy, indicating that in the application of immunosuppressive drugs, the combination therapy can bring out the maximum efficacy of the drugs and achieve the best prognosis.43

Thanks to these findings demonstrating the efficacy of pembrolizumab, the 2022 edition of the CSCO Guidelines for the Treatment of Gastric Cancer formally recommends pembrolizumab monotherapy as a Class II recommended agent for patients with dMMR/MSI-H gastric cancer.39


The development of immunotherapy for stomach cancer has accelerated recently, but it has also encountered additional challenges. The research ideas can be broken down into three main categories. First, due to the repeated failures of the current exploratory in first-line treatment (KEYNOTE-811 study), neoadjuvant therapy (KEYNOTE-585 study), and adjuvant therapy (ATTRACTION-5 study) for advanced gastric cancer, the emphasis of future research will be shifted to optimizing the immune checkpoint inhibitor therapy, which is currently more widely used, increase the efficacy of PD-1/PD-L1 antibody-based immune checkpoint inhibitors and universalize the detection rate of MMR status for patients in clinic. Second, although immunotherapy is more effective against gastric cancer in the Chinese population, and the effectiveness increases as PD-L1 expression rises, the cut-off value of PD-L1 expression is yet unknown. Therefore, in order to increase the accuracy of screening patients for immunotherapy, it is crucial to further investigate the characteristics of the immune microenvironment of gastric cancer and even look for improved biomarkers that can be used to predict the success of PD-1/PD-L1 antibodies. Third, its crucial to keep exploring for new targets in order to develop immunotherapy drugs for gastric cancer. Recently, CLDN18.2 has emerged as the most promising star target in the field of immunotherapy for the disease, and more than 50 different drugs targeting CLDN18.2 are currently undergoing research and development in China. In the future, it is worth looking forward to whether mono-antibody therapy, dual-antibody therapy, chemotherapy plus immunotherapy, or CAR-T therapy would maximize the immunotherapeutic efficacy for gastric cancer.

The treatment of gastric cancer has progressed inconsistently when compared to immunotherapy for other solid tumors, but with the emergence of some creative research and results from fundamental research, we believe that immunotherapy has great potential and advantages in the treatment of gastric cancer, and will improve patient survival.






There are no conflicts of interest.



Not applicable.



Min Jiang drafted the manuscript. Zhengmao Lu undertook the guidance and revised the article. Rui Zheng, Ling Shao and Ning Yao collected the data. All authors read and approved the final manuscript.


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Ting Chen1,2, Rongzhang He1,3, Xinglin Hu1,3,4, Weihao Luo1, Zheng Hu1,3, Jia Li1, Lili Duan1, Yali Xie1,2, Wenna Luo1,2, Tan Tan1,2, Di‑Xian Luo1,2

Novel Molecular Multilevel Targeted Antitumor Agents

Poonam Sonawane1, Young A. Choi1, Hetal Pandya2, Denise M. Herpai1, Izabela Fokt3,
Waldemar Priebe3, Waldemar Debinski1

Fish Oil and Prostate Cancer: Effects and Clinical Relevance

Pei Liang, Michael Gao Jr.

Stemness‑related Markers in Cancer

Wenxiu Zhao1, Yvonne Li2, Xun Zhang1

Autophagy Regulated by miRNAs in Colorectal Cancer Progression and Resistance

Andrew Fesler1, Hua Liu1, Ning Wu1,2, Fei Liu3, Peixue Ling3, Jingfang Ju1,3

Gastric Metastases Mimicking Primary Gastric Cancer: A Brief Literature Review

Simona Gurzu1,2,3, Marius Alexandru Beleaua1, Laura Banias2, Ioan Jung1

Possibility of Specific Expression of the Protein Toxins at the Tumor Site with Tumor‑specialized Promoter

Liyuan Zhou1,2, Yujun Li1,2, Changchen Hu3, Binquan Wang1,2

SKI‑178: A Multitargeted Inhibitor of Sphingosine Kinase and Microtubule Dynamics Demonstrating Therapeutic Efficacy in Acute Myeloid Leukemia Models

Jeremy A. Hengst1,2, Taryn E. Dick1,2, Arati Sharma1, Kenichiro Doi3, Shailaja Hegde4, Su‑Fern Tan5, Laura M. Geffert1,2, Todd E. Fox5, Arun K. Sharma1, Dhimant Desai1, Shantu Amin1, Mark Kester5, Thomas P. Loughran5, Robert F. Paulson4, David F. Claxton6, Hong‑Gang Wang3, Jong K. Yun1,2

A T‑cell Engager‑armed Oncolytic Vaccinia Virus to Target the Tumor Stroma

Feng Yu1, Bangxing Hong1, Xiao‑Tong Song1,2,3

Real‑world Experience with Abiraterone in Metastatic Castration‑resistant Prostate Cancer

Yasar Ahmed1, Nemer Osman1, Rizwan Sheikh2, Sarah Picardo1, Geoffrey Watson1

Combination of Interleukin‑11Rα Chimeric Antigen Receptor T‑cells and Programmed Death‑1 Blockade as an Approach to Targeting Osteosarcoma Cells In vitro

Hatel Rana Moonat, Gangxiong Huang, Pooja Dhupkar, Keri Schadler, Nancy Gordon,
Eugenie Kleinerman

Efficacy and Safety of Paclitaxel‑based Therapy and Nonpaclitaxel‑based Therapy in Advanced Gastric Cancer

Tongwei Wu, Xiao Yang, Min An, Wenqin Luo, Danxian Cai, Xiaolong Qi

Motion Estimation of the Liver Based on Deformable Image Registration: A Comparison Between Four‑Dimensional‑Computed Tomography and Four‑Dimensional-Magnetic Resonance Imaging

Xiao Liang1, Fang‑Fang Yin1,2, Yilin Liu1, Brian Czito2, Manisha Palta2, Mustafa Bashir3, Jing Cai1,2

A Feasibility Study of Applying Thermal Imaging to Assist Quality Assurance of High‑Dose Rate Brachytherapy

Xiaofeng Zhu1, Yu Lei1, Dandan Zheng1, Sicong Li1, Vivek Verma1, Mutian Zhang1, Qinghui Zhang1, Xiaoli Tang2, Jun Lian2, Sha X. Chang2, Haijun Song3, Sumin Zhou1, Charles A. Enke1

Role of Exosome microRNA in Breast Cancer

Wang Qu, Ma Fei, Binghe Xu

Recent Progress in Technological Improvement and Biomedical Applications of the Clustered Regularly Interspaced Short Palindromic Repeats/Cas System

Yanlan Li1,2*, Zheng Hu1*, Yufang Yin3, Rongzhang He1, Jian Hu1, Weihao Luo1, Jia Li1, Gebo Wen2, Li Xiao1, Kai Li1, Duanfang Liao4, Di-Xian Luo1,5

The Significance of Nuclear Factor‑Kappa B Signaling Pathway in Glioma: A Review

Xiaoshan Xu1, Hongwei Yang2, Xin Wang2, Yanyang Tu1

Markerless Four‑Dimensional‑Cone Beam Computed Tomography Projection‑Phase Sorting Using Prior Knowledge and Patient Motion Modeling: A Feasibility Study

Lei Zhang1,2, Yawei Zhang2, You Zhang1,2,3, Wendy B. Harris1,2, Fang‑Fang Yin1,2,4, Jing Cai1,4,5, Lei Ren1,2

The Producing Capabilities of Interferon‑g and Interleukin‑10 of Spleen Cells in Primary and Metastasized Oral Squamous Cell Carcinoma Cells-implanted Mice

Yasuka Azuma1,2, Masako Mizuno‑Kamiya3, Eiji Takayama1, Harumi Kawaki1, Toshihiro Inagaki4, Eiichi Chihara2, Yasunori Muramatsu5, Nobuo Kondoh1

“Eating” Cancer Cells by Blocking CD47 Signaling: Cancer Therapy by Targeting the Innate Immune Checkpoint

Yi‑Rong Xiang, Li Liu

Glycosylation is Involved in Malignant Properties of Cancer Cells

Kazunori Hamamura1, Koichi Furukawa2

Biomarkers in Molecular Epidemiology Study of Oral Squamous Cell Carcinoma in the Era of Precision Medicine

Qing‑Hao Zhu1*, Qing‑Chao Shang1*, Zhi‑Hao Hu1*, Yuan Liu2, Bo Li1, Bo Wang1, An‑Hui Wang1

I‑Kappa‑B Kinase‑epsilon Activates Nuclear Factor‑kappa B and STAT5B and Supports Glioblastoma Growth but Amlexanox Shows Little Therapeutic Potential in These Tumors

Nadège Dubois1, Sharon Berendsen2, Aurélie Henry1,2, Minh Nguyen1, Vincent Bours1,
Pierre Alain Robe1,2

Suppressive Effect of Mesenchymal Stromal Cells on Interferon‑g‑Producing Capability of Spleen Cells was Specifically Enhanced through Humoral Mediator(s) from Mouse Oral Squamous Cell Carcinoma Sq‑1979 Cells In Vitro

Toshihiro Inagaki1,2, Masako Mizuno‑Kamiya3, Eiji Takayama1, Harumi Kawaki1, Eiichi Chihara4, Yasunori Muramatsu5, Shinichiro Sumitomo5, Nobuo Kondoh1

An Interplay Between MicroRNA and SOX4 in the Regulation of Epithelial–Mesenchymal Transition and Cancer Progression

Anjali Geethadevi1, Ansul Sharma2, Manish Kumar Sharma3, Deepak Parashar1

MicroRNAs Differentially Expressed in Prostate Cancer of African‑American and European‑American Men

Ernest K. Amankwah

The Role of Reactive Oxygen Species in Screening Anticancer Agents

Xiaohui Xu1, Zilong Dang2, Taoli Sun3, Shengping Zhang1, Hongyan Zhang1

Panobinostat and Its Combination with 3‑Deazaneplanocin‑A Induce Apoptosis and Inhibit In vitro Tumorigenesis and Metastasis in GOS‑3 Glioblastoma Cell Lines

Javier de la Rosa*, Alejandro Urdiciain*, Juan Jesús Aznar‑Morales, Bárbara Meléndez1,
Juan A. Rey2, Miguel A. Idoate3, Javier S. Castresana

Cancer Stem‑Like Cells Have Cisplatin Resistance and miR‑93 Regulate p21 Expression in Breast Cancer

Akiko Sasaki1, Yuko Tsunoda2, Kanji Furuya3, Hideto Oyamada1, Mayumi Tsuji1, Yuko Udaka1, Masahiro Hosonuma1, Haruna Shirako1, Nana Ichimura1, Yuji Kiuchi1

The Contribution of Hexokinase 2 in Glioma

Hui Liu1, Hongwei Yang2, Xin Wang3, Yanyang Tu1

The Mechanism of BMI1 in Regulating Cancer Stemness Maintenance, Metastasis, Chemo‑ and Radiation Resistance

Xiaoshan Xu, Zhen Wang, Nan Liu, Pengxing Zhang, Hui Liu, Jing Qi, Yanyang Tu

A Multisource Adaptive Magnetic Resonance Image Fusion Technique for Versatile Contrast Magnetic Resonance Imaging

Lei Zhang1,2, Fang‑Fang Yin1,2,3, Brittany Moore1,2, Silu Han1,2, Jing Cai1,2,4

Senescence and Cancer

Sulin Zeng1,2, Wen H. Shen2, Li Liu1

The “Wild”‑type Gastrointestinal Stromal Tumors: Heterogeneity on Molecule Characteristics and Clinical Features

Yanhua Mou1, Quan Wang1, Bin Li1,2

Retreatment with Cabazitaxel in a Long‑Surviving Patient with Castration‑Resistant Prostate Cancer and Visceral Metastasis

Raquel Luque Caro, Carmen Sánchez Toro, Lucia Ochoa Vallejo

Therapy‑Induced Histopathological Changes in Breast Cancers: The Changing Role of Pathology in Breast Cancer Diagnosis and Treatment

Shazima Sheereen1, Flora D. Lobo1, Waseemoddin Patel2, Shamama Sheereen3,
Abhishek Singh Nayyar4, Mubeen Khan5

Glioma Research in the Era of Medical Big Data

Feiyifan Wang1, Christopher J. Pirozzi2, Xuejun Li1

Transarterial Embolization for Hepatocellular Adenomas: Case Report and Literature Review

Jian‑Hong Zhong1,2, Kang Chen1, Bhavesh K. Ahir3, Qi Huang4, Ye Wu4, Cheng‑Cheng Liao1, Rong‑Rong Jia1, Bang‑De Xiang1,2, Le‑Qun Li1,2

Nicotinamide Phosphoribosyltransferase: Biology, Role in Cancer, and Novel Drug Target

Antonio Lucena‑Cacace1,2,3, Amancio Carnero1,2

Enhanced Anticancer Effect by Combination of Proteoglucan and Vitamin K3 on Bladder Cancer Cells

Michael Zhang, Kelvin Zheng, Muhammad Choudhury, John Phillips, Sensuke Konno

Molecular Insights Turning Game for Management of Ependymoma: A Review of Literature

Ajay Sasidharan, Rahul Krishnatry

IDH Gene Mutation in Glioma

Leping Liu1, Xuejun Li1,2

Challenges and Advances in the Management of Pediatric Intracranial Germ Cell Tumors: A Case Report and Literature Review

Gerard Cathal Millen1, Karen A. Manias1,2, Andrew C. Peet1,2, Jenny K. Adamski1

Assessing the Feasibility of Using Deformable Registration for Onboard Multimodality‑Based Target Localization in Radiation Therapy

Ge Ren1,2,3, Yawei Zhang1,2, Lei Ren1,2

Research Advancement in the Tumor Biomarker of Hepatocellular Carcinoma

Qing Du1, Xiaoying Ji2, Guangjing Yin3, Dengxian Wei3, Pengcheng Lin1, Yongchang Lu1,
Yugui Li3, Qiaohong Yang4, Shizhu Liu5, Jinliang Ku5, Wenbin Guan6, Yuanzhi Lu7

Novel Insights into the Role of Bacterial Gut Microbiota in Hepatocellular Carcinoma

Lei Zhang1, Guoyu Qiu2, Xiaohui Xu2, Yufeng Zhou3, Ruiming Chang4

Central Odontogenic Fibroma with Unusual Presenting Symptoms

Aanchal Tandon, Bharadwaj Bordoloi, Safia Siddiqui, Rohit Jaiswal

The Prognostic Role of Lactate in Patients Who Achieved Return of Spontaneous Circulation after Cardiac Arrest: A Systematic Review and Meta‑analysis

Dongni Ren1, Xin Wang2, Yanyang Tu1,2

Inhibitory Effect of Hyaluronidase‑4 in a Rat Spinal Cord Hemisection Model

Xipeng Wang1,2, Mitsuteru Yokoyama2, Ping Liu3

Research and Development of Anticancer Agents under the Guidance of Biomarkers

Xiaohui Xu1, Guoyu Qiu1, Lupeng Ji2, Ruiping Ma3, Zilong Dang4, Ruling Jia1, Bo Zhao1

Idiopathic Hypereosinophilic Syndrome and Disseminated Intravascular Coagulation

Mansoor C. Abdulla

Phosphorylation of BRCA1‑Associated Protein 1 as an Important Mechanism in the Evasion of Tumorigenesis: A Perspective

Guru Prasad Sharma1, Anjali Geethadevi2, Jyotsna Mishra3, G. Anupa4, Kapilesh Jadhav5,
K. S. Vikramdeo6, Deepak Parashar2

Progress in Diagnosis and Treatment of Mixed Adenoneuroendocrine Carcinoma of Biliary‑Pancreatic System

Ge Zengzheng1, Huang-Sheng Ling2, Ming-Feng Li2, Xu Xiaoyan1, Yao Kai1, Xu Tongzhen3,
Ge Zengyu4, Li Zhou5

Surface-Enhanced Raman Spectroscopy to Study the Biological Activity of Anticancer Agent

Guoyu Qiu1, Xiaohui Xu1, Lupeng Ji2, Ruiping Ma3, Zilong Dang4, Huan Yang5

Alzheimer’s Disease Susceptibility Genes in Malignant Breast Tumors

Steven Lehrer1, Peter H. Rheinstein2

OSMCC: An Online Survival Analysis Tool for Merkel Cell Carcinoma

Umair Ali Khan Saddozai1, Qiang Wang1, Xiaoxiao Sun1, Yifang Dang1, JiaJia Lv1,2, Junfang Xin1, Wan Zhu3, Yongqiang Li1, Xinying Ji1, Xiangqian Guo1

Protective Activity of Selenium against 5‑Fluorouracil‑Induced Nephrotoxicity in Rats

Elias Adikwu, Nelson Clemente Ebinyo, Beauty Tokoni Amgbare

Advances on the Components of Fibrinolytic System in Malignant Tumors

Zengzheng Ge1, Xiaoyan Xu1, Zengyu Ge2, Shaopeng Zhou3, Xiulin Li1, Kai Yao1, Lan Deng4

A Patient with Persistent Foot Swelling after Ankle Sprain: B‑Cell Lymphoblastic Lymphoma Mimicking Soft‑tissue Sarcoma

Crystal R. Montgomery‑Goecker1, Andrew A. Martin2, Charles F. Timmons3, Dinesh Rakheja3, Veena Rajaram3, Hung S. Luu3

Coenzyme Q10 and Resveratrol Abrogate Paclitaxel‑Induced Hepatotoxicity in Rats

Elias Adikwu, Nelson Clemente Ebinyo, Loritta Wasini Harris

Progress in Clinical Follow‑up Study of Dendritic Cells Combined with Cytokine‑Induced Killer for Stomach Cancer

Ling Wang1,2, Run Wan1,2, Cong Chen1,2, Ruiliang Su1,2, Yumin Li1,2

Supraclavicular Lymphadenopathy as the Initial Manifestation in Carcinoma of Cervix

Priyanka Priyaarshini1, Tapan Kumar Sahoo2

ABO Typing Error Resolution and Transfusion Support in a Case of an Acute Leukemia Patient Showing Loss of Antigen Expression

Debasish Mishra1, Gopal Krushna Ray1, Smita Mahapatra2, Pankaj Parida2

Protein Disulfide Isomerase A3: A Potential Regulatory Factor of Colon Epithelial Cells

Yang Li1, Zhenfan Huang2, Haiping Jiang3

Clinicopathological Association of p16 and its Impact on Outcome of Chemoradiation in Head‑and‑Neck Squamous Cell Cancer Patients in North‑East India

Srigopal Mohanty1, Yumkhaibam Sobita Devi2, Nithin Raj Daniel3, Dulasi Raman Ponna4,
Ph. Madhubala Devi5, Laishram Jaichand Singh2

Potential Inhibitor for 2019‑Novel Coronaviruses in Drug Development

Xiaohui Xu1, Zilong Dang2, Lei Zhang3, Lingxue Zhuang4, Wutang Jing5, Lupeng Ji6, Guoyu Qiu1

Best‑Match Blood Transfusion in Pediatric Patients with Mixed Autoantibodies

Debasish Mishra1, Dibyajyoti Sahoo1, Smita Mahapatra2, Ashutosh Panigrahi3

Characteristics and Outcome of Patients with Pheochromocytoma

Nadeema Rafiq1, Tauseef Nabi2, Sajad Ahmad Dar3, Shahnawaz Rasool4

Comparison of Histopathological Grading and Staging of Breast Cancer with p53‑Positive and Transforming Growth Factor‑Beta Receptor 2‑Negative Immunohistochemical Marker Expression Cases

Palash Kumar Mandal1, Anindya Adhikari2, Subir Biswas3, Amita Giri4, Arnab Gupta5,
Arindam Bhattacharya6

Chemical Compositions and Antiproliferative Effect of Essential Oil of Asafoetida on MCF7 Human Breast Cancer Cell Line and Female Wistar Rats

Seyyed Majid Bagheri1,2, Davood Javidmehr3, Mohammad Ghaffari1, Ehsan Ghoderti‑Shatori4

Cyclooxygenase‑2 Contributes to Mutant Epidermal Growth Factor Receptor Lung Tumorigenesis by Promoting an Immunosuppressive Environment

Mun Kyoung Kim1, Aidin Iravani2, Matthew K. Topham2,3

Potential role of CircMET as A Novel Diagnostic Biomarker of Papillary Thyroid Cancer

Yan Liu1,2,3,4#, Chen Cui1,2,3,4#, Jidong Liu1,2,3,4, Peng Lin1,2,3,4,Kai Liang1,2,3,4, Peng Su5, Xinguo Hou1,2,3,4, Chuan Wang1,2,3,4, Jinbo Liu1,2,3,4, Bo Chen6, Hong Lai1,2,3,4, Yujing Sun1,2,3,4* and Li Chen 1,2,3,4*

Cuproptosis-related Genes in Glioblastoma as Potential Therapeutic Targets

Zhiyu Xia1,2, Haotian Tian1, Lei Shu1,2, Guozhang Tang3, Zhenyu Han4, Yangchun Hu1*, Xingliang Dai1*

Cancer Diagnosis and Treatments by Porous Inorganic Nanocarriers

Jianfeng Xu1,2, Hanwen Zhang1,2, Xiaohui Song1,2, Yangong Zheng3, Qingning Li1,2,4*

Delayed (20 Years) post-surgical Esophageal Metastasis of Breast Cancer - A Case Report

Bowen Hu1#, Lingyu Du2#, Hongya Xie1, Jun Ma1, Yong Yang1*, Jie Tan2*

Subtyping of Undifferentiated Pleomorphic Sarcoma and Its Clinical Meaning

Umair Ali Khan Saddozai, Zhendong Lu, Fengling Wang, Muhammad Usman Akbar, Saadullah Khattak, Muhammad Badar, Nazeer Hussain Khan, Longxiang Xie, Yongqiang Li, Xinying Ji, Xiangqian Guo

Construction of Glioma Prognosis Model and Exploration of Related Regulatory Mechanism of Model Gene

Suxia Hu, Abdusemer Reyimu, Wubi Zhou, Xiang Wang, Ying Zheng, Xia Chen, Weiqiang Li, Jingjing Dai

ESRP2 as a Non-independent Potential Biomarker-Current Progress in Tumors

Yuting Chen, Yuzhen Rao, Zhiyu Zeng, Jiajie Luo, Chengkuan Zhao, Shuyao Zhang

Resection of Bladder Tumors at the Ureteral Orifice Using a Hook Plasma Electrode: A Case Report

Jun Li, Ziyong Wang, Qilin Wang

Structural Characterization and Bioactivity for Lycium Barbarum Polysaccharides

Jinghua Qi1,2,  Hangping Chen3,Huaqing Lin2,4,Hongyuan Chen1,2,5* and Wen Rui2,3,5,6*

The Role of IL-22 in the Prevention of Inflammatory Bowel Disease and Liver Injury

Xingli Qi1,2, Huaqing Lin2,3, Wen Rui2,3,4,5 and Hongyuan Chen1,2,3

RBM15 and YTHDF3 as Positive Prognostic Predictors in ESCC: A Bioinformatic Analysis Based on The Cancer Genome Atlas (TCGA)

Yulou Luo1, Lan Chen2, Ximing Qu3, Na Yi3, Jihua Ran4, Yan Chen3,5*

Mining and Analysis of Adverse Drug Reaction Signals Induced by Anaplastic Lymphoma Kinase-Tyrosine Kinase Inhibitors Based on the FAERS Database

Xiumin Zhang1,2#, Xinyue Lin1,3#, Siman Su1,3#, Wei He3, Yuying Huang4, Chengkuan Zhao3, Xiaoshan Chen3, Jialin Zhong3, Chong Liu3, Wang Chen3, Chengcheng Xu3, Ping Yang5, Man Zhang5, Yanli Lei5*, Shuyao Zhang1,3*

Tumor Regression after COVID-19 Infection in Metastatic Adrenocortical Carcinoma Treated with Immune Checkpoint Blockade: A Case Report

Qiaoxin Lin1, Bin Liang1, Yangyang Li2, Ling Tian3*, Dianna Gu1*

Mining and Analysis of Adverse Events of BRAF Inhibitors Based on FDA Reporting System

Silan Peng1,2#, Danling Zheng1,3#, Yanli Lei4#, Wang Chen3, Chengkuan Zhao3, Xinyue Lin1, Xiaoshan Chen3, Wei He3, Li Li3, Qiuzhen Zhang5*, Shuyao Zhang1,3*

Malignant Phyllodes Tumor with Fever, Anemia, Hypoproteinemia: A Rare and Strange Case Report and Literature Review

Zhenghang Li1, Yuxian Wei1*

Construction of Cuproptosis-Related LncRNA Signature as a Prognostic Model Associated with Immune Microenvironment for Clear-Cell Renal Cell Carcinoma

Jiyao Yu1#, Shukai Zhang2#, Qingwen Ran3, Xuemei Li4,5,6*

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