Camrelizumab plus Famitinib in Patients with Advanced or Metastatic Renal Cell Carcinoma: Data from an Open-label, Multicenter Phase II Basket Study

Purpose: Blockade of immune checkpoint and angiogenesis is an effective treatment strategy for advanced or metastatic renal cell carcinoma (RCC). We report the results of camrelizumab plus famitinib in the RCC cohort of an open-label, multicenter, phase II basket study. Patients and Methods: Eligible patients were enrolled to receive camrelizumab (200 mg i.v. every 3 weeks) and famitinib (20 mg orally once daily). Primary endpoint was objective response rate (ORR) per RECIST version 1.1. Results: Totally, 38 patients were recruited, including 13 (34.2%) treatment-naive and 25 (65.8%) previously treated patients. With a median duration from enrollment to data cutoff of 16.5 months (range, 6.1-20.4), 23 patients achieved a confirmed objective response, and ORR was 60.5% [95% confidence interval (CI), 43.4-76.0]. Responses in 18 (78.3%) responders were still ongoing, and Kaplan-Meier estimated median duration of response had not been reached yet (range, 1.0(+)-14.8(+Y) months). Median progression-free survival (PFS) was 14.6 months (95% CI, 6.2-not reached). ORR was 84.6% (95% CI, 54.6-98.1) in treatment-naive patients and 48.0% (95% CI, 27.8-68.7) in pretreated patients; median PFS had not been reached and was 13.4 months (95% CI, 4.1-not reached), respectively. Most common grade 3 or 4 treatmentrelated adverse events included proteinuria (18.4%), hypertension (18.4%), decreased neutrophil count (13.2%), palmar-plantar erythrodysesthesia syndrome (10.5%), and hypertriglyceridemia (10.5%). No treatment-related deaths occurred, and no new safety signals were observed. Conclusions: Camrelizumab plus famitinib showed potent and enduring antitumor activity in patients with advanced or metastatic RCC, both in treatment-naive and previously treated population.

Automated summary

The combination of camrelizumab and famitinib demonstrated potent and enduring antitumor activity in patients with advanced or metastatic RCC, with a higher objective response rate in treatment-naive patients compared to previously treated patients. The median progression-free survival had not been reached for treatment-naive patients, indicating a promising treatment strategy for this population.