Evidence mapPaperPMID 41859296Full record

ArticleImmunoTargets and therapy2026

Induction Chemotherapy Followed by Immunotherapy Increases Pathological Complete Response Rate in dMMR/MSI-H Gastric Cancer: A Retrospective Cohort Study.

Hong Zeng, Yingying Wu, Ziwei Zhang, Jingdong Liu, Jie Sun, Xinyou Liu, Yuan Gu, Mengxin Tian, Weidong Chen, Zhenbin Shen and 5 more

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Article in ImmunoTargets and therapy, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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5 · Who and what money

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15 authors.

Hong Zeng *Department of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Yingying Wu *Department of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Ziwei ZhangDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Jingdong LiuDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Jie SunDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Xinyou LiuDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.ORCID 0009-0003-6343-659X
Yuan GuDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Mengxin TianDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Weidong ChenDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Zhenbin ShenDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Kuntang ShenDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Chen XuDepartment of Pathology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Xuefei WangDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.
Zhaoqing TangDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.ORCID 0000-0001-5286-6330
Yihong SunDepartment of Gastrointestinal Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Immune checkpoint inhibitor (ICI)-based strategies have become a consensus in the preoperative treatment of mismatch repair-deficient (dMMR)/microsatellite instability-high (MSI-H) gastric cancer (GC). However, the necessity and optimal strategy of combining ICIs with chemotherapy remain uncertain. Methods: This retrospective study aimed to evaluate the efficacy of different preoperative chemo-immunotherapy combinations in patients with dMMR/MSI-H GC. According to their therapeutic regimens, patients were divided into three cohorts: ICI-alone cohort; immunotherapy with induction chemotherapy (IC) cohort (ICI + IC): 1-2 cycles of IC followed by ICI; concurrent chemo-immunotherapy cohort (ICI + chemo): ICI combined with chemotherapy throughout the entire preoperative treatment. The pathological complete response (pCR) rate and major pathological response (MPR) rate were analyzed. Peripheral blood parameters before and after preoperative treatment were analyzed. Results: A total of 45 patients with locally advanced or oligometastatic dMMR/MSI-H GC were included. Baseline characteristics were well balanced among the three cohorts. The pCR rates were 18.2% (95% CI, 2.3-51.8%) in the ICI-alone cohort, 85.7% (95% CI, 42.1-99.6%) in the ICI + IC cohort, and 37.0% (95% CI, 19.4-57.6%) in the ICI + chemo cohort. Notably, the ICI + IC cohort showed a significantly higher pCR rate than the other two cohorts (p=0.015). The MPR rates were 54.5%, 85.7%, and 48.1% in the three cohorts, respectively, with no statistical significance. After preoperative treatment, monocyte-to-lymphocyte ratio exhibited an upward trend in the ICI + IC (p=0.100) and ICI + chemo (p=0.058) cohorts, indicating enhanced antigen presentation activity and immune activation. Conclusion: A preoperative strategy of IC followed by ICIs significantly increased pCR rate compared to ICI monotherapy or concurrent chemo-immunotherapy, suggesting a more effective strategy for patients with resectable dMMR/MSI-H GC. Given its retrospective design, small sample size, and lack of safety data, this study warrants validation in prospective clinical trials.

Indexed as

chemotherapydMMR/MSI-H gastric cancerimmunotherapyinduction therapypathological complete responsepreoperative treatment

Identifiers

PMID41859296
PMCPMC12998556

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.