Journal of International Oncology ›› 2022, Vol. 49 ›› Issue (5): 270-275.doi: 10.3760/cma.j.cn371439-20211123-00050

• Original Articles • Previous Articles     Next Articles

Predictive value of tissue TSR for the efficacy of immunotherapy in non-small lung cancer

Xiao Mengxia1, Yao Yi1,2(), Gao Likun3, Song Qibin1,2()   

  1. 1Cancer Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
    2Hubei Provincial Research Center for Precision Medicine of Cancer, Wuhan 430200, China
    3Department of Pathology, Renmin Hospital of Wuhan University, Wuhan 430060, China
  • Received:2021-11-23 Revised:2022-03-13 Online:2022-05-08 Published:2022-05-31
  • Contact: Yao Yi,Song Qibin E-mail:yaoyi2018@whu.edu.cn;qibinsong@whu.edu.cn

Abstract:

Objective To explore the value of tumor stroma ratio (TSR) in non-small lung cancer (NSCLC) tissue in predicting the efficacy of tumor immunotherapy. Methods The clinical and histopathological data of patients with stage ⅢB-Ⅳ NSCLC treated with immune checkpoint inhibitors in the Renmin Hospital of Wuhan University from January 2017 to December 2020 were collected. Taking 50% as the TSR boundary value, the patients were divided into low TSR group (≤50%) and high TSR group (>50%). The histopathological features, 4-cycle objective response rate (ORR) and disease control rate (DCR), 6-cycle ORR and DCR, and progression-free survival (PFS) were compared between the two groups. Univariate and multivariate Cox regression models were used to analyze the prognostic factors related to PFS. Results A total of 50 patients were included, including 27 with low TSR and 23 with high TSR. There were no significant differences between the two groups in age (χ2=0.59, P=0.441), gender (P=0.578), smoking history (χ2=0.12, P=0.730), histopathological type (χ2=2.33, P=0.313), TNM stage (χ2=0.22, P=0.636), 4-cycle ORR (χ2=0.48, P=0.487) and DCR (P=0.593), 6-cycle ORR (χ2=0.05, P=0.818) and DCR (P=0.641). The incidence of brain metastasis was higher in the high TSR group than that in the low TSR group [34.8% (8/23) vs. 7.4%(2/27), χ2=4.23, P=0.040]. Kaplan-Meier survival analysis showed that the PFS in the low TSR group was significantly longer than that in the high TSR group (15.6 months vs. 10.2 months, χ2=13.84, P<0.001). Univariate analysis showed that TSR value (HR=0.29, 95%CI: 0.14-0.58, P<0.001) and brain metastasis (HR=2.38, 95%CI: 1.12-5.05, P=0.024) were correlated with the worse prognosis of NSCLC patients. Multivariate Cox regression analysis showed that TSR value was an independent prognostic factor for NSCLC immunotherapy (HR=0.32, 95%CI: 0.14-0.70, P=0.004). Conclusion TSR is an independent predictor of immunotherapy for NSCLC, but whether it can predict the short-term efficacy of immunotherapy for advanced NSCLC still needs further research.

Key words: Carcinoma, non-small-cell lung, Tumor stroma ratio, Immunotherapy, Curative effect, Prognosis