ArticleJournal of clinical oncology : official journal of the American Society of Clinical Oncology2025
COSMIC-021 Phase Ib Study of Cabozantinib Plus Atezolizumab: Results from the Locally Advanced or Metastatic Urothelial Carcinoma Cohorts.
Article in Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03170960 (A Phase 1b Dose-Escalation Study of Cabozantinib), which is not on this map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Phase 1b Dose-Escalation Study of Cabozantinib (XL184) Administered Alone or in Combination With Atezolizumab to Subjects With Locally Advanced or Metastatic Solid Tumors
Who cites it
3 citing papers in PubMed.
- Population Pharmacokinetics of Cabozantinib: Updated Analyses Including Data in Combination With Atezolizumab in Patients With Castration-Resistant Prostate Cancer and Other Tumor Types.Clinical and translational science · 2026Article
- ctDNA-guided treatment decisions in muscle-invasive bladder cancer.Nature reviews. Urology · 2026Article
- Emerging Protein Targets in Triple-Negative Breast Cancer: Beyond Conventional Therapy.Cancers · 2026Review
Corrections and comments
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Authors and funding
18 authors.
Funding
Abstract
purposeThe COSMIC-021 study assessed the safety and efficacy of cabozantinib plus atezolizumab in advanced solid tumors. Presented here are results from the expansion cohorts with advanced urothelial carcinoma (UC).
methodsThis phase Ib study (ClinicalTrials.gov identifier: NCT03170960) enrolled patients with inoperable locally advanced/metastatic UC into four tumor cohorts: first-line cisplatin-eligible (cis-eligible), first-line cisplatin-ineligible (cis-ineligible), previous platinum-containing chemotherapy (previous chemotherapy-treated), and previous immune checkpoint inhibitor (ICI)-treated. Patients received oral cabozantinib 40 mg once daily and intravenous atezolizumab 1,200 mg once every 3 weeks. The primary end point was objective response rate (ORR), as assessed by the investigator per RECIST v1.1 every 6 weeks for 12 months and every 12 weeks thereafter; the secondary end point was safety.
resultsA total of 121 patients (previous ICI-treated cohort, n = 31, and each of the other cohorts, n = 30) received study treatment from March 2018 to November 2021. The ORR (95% CI) was 30% (15 to 49) for cis-eligible, 20% (8 to 39) for cis-ineligible, 27% (12 to 46) for previous chemotherapy-treated, and 10% (2 to 26) for previous ICI-treated cohorts. The median progression-free survival (95% CI) was 5.5 (1.6 to 11.6), 5.6 (3.1 to 11.1), 5.4 (1.6 to 7.6), and 3.0 (1.8 to 5.5) months, respectively. Grade 3 or 4 treatment-related adverse events (TRAEs) were experienced by 43%, 67%, 57%, and 45% of patients, respectively. TRAEs led to discontinuation of all treatment components in 17%, 13%, 3%, and 19%, respectively. No grade 5 TRAEs were reported in any cohort.
conclusionThe novel combination of cabozantinib plus atezolizumab exhibited clinical activity in advanced UC that is cis-eligible, cis-ineligible, or previously treated with platinum-containing chemotherapy; clinical activity in previous ICI-treated UC was modest. The toxicity profile was consistent with that previously reported for the combination.
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