Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Clinical Trial
. 2022 Feb 1;28(3):489-497.
doi: 10.1158/1078-0432.CCR-21-2210. Epub 2021 Nov 5.

Safety, Efficacy, and Biomarker Analysis of Toripalimab in Patients with Previously Treated Advanced Urothelial Carcinoma: Results from a Multicenter Phase II Trial POLARIS-03

Xinan Sheng #  1 , Haige Chen #  2 , Bin Hu  3 , Xudong Yao  4 , Ziling Liu  5 , Xin Yao  6 , Hongqian Guo  7 , Yi Hu  8 , Zhigang Ji  9 , Hong Luo  10 , Benkang Shi  11 , Jiyan Liu  12 , Jin Wu  13 , FangJian Zhou  14 , Zhisong He  15 , Jinhai Fan  16 , Weifeng Wang  17 , Hui Feng  18   19 , Sheng Yao  18   19 , Patricia Keegan  19 , Yiran Huang  20 , Jun Guo  21
Affiliations
Clinical Trial

Safety, Efficacy, and Biomarker Analysis of Toripalimab in Patients with Previously Treated Advanced Urothelial Carcinoma: Results from a Multicenter Phase II Trial POLARIS-03

Xinan Sheng et al. Clin Cancer Res. .

Abstract

Purpose: Immunotherapy offers a second-line option for patients with metastatic urothelial carcinoma (mUC) who failed standard therapy, but the biomarkers for predicting response remain to be explored. This study aims to evaluate the safety, efficacy, and correlative biomarker of toripalimab in patients with previously treated mUC.

Patients and methods: Patients with mUC received toripalimab 3 mg/kg Q2W. Clinical response was assessed every 8 weeks by an independent review committee per RECIST v1.1. Tumor PD-L1 expression, tumor mutational burden (TMB), and other biomarkers were evaluated.

Results: Among the intention-to-treat population (n = 151), 85% of the patients experienced treatment-related adverse event (TRAE) and 20% experienced grade 3 and above TRAE. The objective response rate (ORR) was 26% with a disease control rate (DCR) of 45%. The median duration of response, progression-free survival (PFS), and overall survival (OS) were 19.7 months [95% confidence interval (CI): 13.9-not estimable], 2.3 months (95% CI, 1.8-3.6), and 14.4 months (95% CI, 9.3-23.1), respectively. Both PD-L1+ and TMB-high (10 mutations/Mb as the cutoff) patients had better ORR than PD-L1- patients (42% vs. 17%, P = 0.002) and TMB-low patients (48% vs. 22%, P = 0.014), respectively. The TMB-high group also showed better PFS (12.9 vs. 1.8 months, P < 0.001) and OS (not reached versus 10.0 months, P = 0.018) than the TMB-low group.

Conclusions: Toripalimab has demonstrated encouraging clinical activity in the second-line treatment of mUC with a manageable safety profile. PD-L1 expression and TMB were two independent biomarkers in the study.

PubMed Disclaimer

References

    1. Mollica V, Rizzo A, Montironi R, Cheng L, Giunchi F, Schiavina R, et al. Current strategies and novel therapeutic approaches for metastatic urothelial carcinoma. Cancers (Basel). 2020;12:1449.
    1. Galsky MD, Chen GJ, Oh WK, Bellmunt J, Roth BJ, Petrioli R, et al. Comparative effectiveness of cisplatin-based and carboplatin-based chemotherapy for treatment of advanced urothelial carcinoma. Ann Oncol. 2012;23:406–10.
    1. von der Maase H, Hansen SW, Roberts JT, Dogliotti L, Oliver T, Moore MJ, et al. Gemcitabine and cisplatin versus methotrexate, vinblastine, doxorubicin, and cisplatin in advanced or metastatic bladder cancer: results of a large, randomized, multinational, multicenter, phase III study. J Clin Oncol. 2000;18:3068–77.
    1. Bellmunt Jder Maase H, Mead GM, Skoneczna I, De Santis M, Daugaard G, et al. Randomized phase III study comparing paclitaxel/cisplatin/gemcitabine and gemcitabine/cisplatin in patients with locally advanced or metastatic urothelial cancer without prior systemic therapy: EORTC intergroup study 30987. J Clin Oncol. 2012;30:1107–13.
    1. Oing C, Rink M, Oechsle K, Seidel C, von Amsberg G, Bokemeyer C. Second line chemotherapy for advanced and metastatic urothelial carcinoma: vinflunine and beyond-a comprehensive review of the current literature. J Urol. 2016;195:254–63.

Publication types