China Oncology ›› 2023, Vol. 33 ›› Issue (5): 460-468.doi: 10.19401/j.cnki.1007-3639.2023.05.006

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The value of combined detection of LDHA and PD-L1 in predicting the efficacy and prognosis of advanced gastric cancer patients treated with PD-1 inhibitor

ZUO Xueliang1,2(), CHEN Zhiqiang3, DONG Runyu1, WANG Zhixiong1, CAI Juan2,4()   

  1. 1. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu 241001, Anhui Province, China
    2. Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wuhu 241001, Anhui Province, China
    3. Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
    4. Department of Oncology, The First Affiliated Hospital, Yijishan Hospital of Wannan Medical College, Wuhu 241001, Anhui Province, China
  • Received:2022-10-26 Revised:2023-03-02 Online:2023-05-30 Published:2023-06-16
  • Contact: CAI Juan

Abstract:

Background and purpose: The response rate of gastric cancer patients to programmed death-1 (PD-1) inhibitor is relatively low. Establishing a useful efficacy prediction method to screen the superior gastric cancer patients receiving anti-PD-1 therapy could improve the prognosis of patients. This study aimed to explore the value of combined detection of lactate dehydrogenase (LDHA) and programmed death ligand-1 (PD-L1) expressions in predicting the efficacy and prognosis of gastric cancer patients treated with PD-1 inhibitor. Methods: The clinicopathological data of 50 advanced gastric cancer patients treated with PD-1 inhibitor in The First Affiliated Hospital of Wannan Medical College from January 2020 to March 2022 were retrospectively analyzed. The independent risk factors affecting the efficacy of PD-1 inhibitor were analyzed by multivariate logistic regression. The value of combined detection of LDHA and PD-L1 in predicting the efficacy of PD-1 inhibitors in gastric cancer was analyzed by receiver operating characteristic (ROC) curve analysis. Gastric cancer patient survival was analyzed by Kaplan-Meier method. Results: The objective response rate (ORR) of gastric cancer patients receiving PD-1 inhibitor therapy in LDHA low and high expression groups were 59% and 10%, respectively. The disease control rate (DCR) in LDHA low and high expression groups were 83% and 29%, respectively. The difference was statistically significant (P<0.001). Multivariate logistic regression analysis showed that PD-L1 combined positive score (CPS)<5 and LDHA high expression were independent risk factors affecting the efficacy of PD-1 inhibitor in gastric cancer (P<0.05). ROC curve analysis showed that combined detection of LDHA and PD-L1 had good predictive value for the efficacy of PD-1 inhibitor in gastric cancer [area under curve (AUC) was 0.951]. Kaplan-Meier survival analysis showed that gastric cancer patients with low LDHA expression and PD-L1 CPS≥5 had longer overall survival (OS, P=0.003) and progression-free survival (PFS, P<0.001) after receiving PD-1 inhibitor therapy. Conclusion: Low LDHA expression and PD-L1 CPS≥5 were positively correlated with the efficacy of PD-1 inhibitor in gastric cancer. Gastric cancer patients with low LDHA expression and PD-L1 CPS≥5 significantly had prolonged OS and PFS after receiving PD-1 therapy. Therefore, the combined detection of LDHA and PD-L1 expressions has good value in predicting the efficacy and evaluating prognosis of advanced gastric cancer patients treated with PD-1 inhibitor.

Key words: Stomach neoplasms, Immune checkpoint inhibitors, Immunotherapy, Efficacy, Prognosis

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