ArticleCancer research communications2024
A Pilot Study of the CD38 Antagonist Daratumumab in Patients with Metastatic Renal Cell Carcinoma or Muscle-Invasive Bladder Cancer.
Article in Cancer research communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Article
- A Review of Immunotherapy in Renal Cell Carcinoma: Current Landscape and Future Directions.Cancers · 2025Review
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Authors and funding
21 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeWe performed a pilot study of daratumumab (an mAb directed against CD38) in muscle-invasive bladder cancer (MIBC) and treatment-refractory metastatic renal cell carcinoma (mRCC). EXPERIMENTAL
designPatients with MIBC underwent baseline transurethral resection of the bladder tumor followed by four weekly doses of daratumumab prior to cystectomy. Patients with mRCC underwent baseline and sequential biopsies after eight weekly doses. The primary endpoint was safety. The secondary endpoints were pathologic complete response rate for the MIBC cohort and objective response rate and progression-free survival for the mRCC cohort. Exploratory analyses included immune monitoring and overall survival. A Bayesian sequential monitoring design for toxicity was used for excessive toxicity.
resultsIn both the MIBC (n = 8) and mRCC (n = 8) cohorts, no toxicity events were encountered. In the MIBC cohort, one patient experienced pathologic complete response rate. In the mRCC cohort, no objective responses were reported, and the median progression-free survival was 1.5 months (95% confidence interval, 1.1-1.8 months). Immune monitoring found significant reductions in NK cells in circulation in both cohorts after treatment. In the tissue analysis, IHC found evidence of diminished CD38 presence in mRCC with treatment, whereas the baseline levels in MIBC were low.
conclusionTreatment with daratumumab was safe. No signal of efficacy was detected in mRCC, and conclusions on the activity in MIBC were limited. Evidence of daratumumab targeting CD38 was detected in circulating immune cells and within the tumor microenvironment of mRCC and MIBC. SIGNIFICANCE: In this prospective clinical trial of daratumumab, treatment in patients with MIBC and mRCC was safe. Limited efficacy was observed. Treatment with daratumumab resulted in CD38-expressing immune cell subsets to be targeted both in circulation and within the tumor microenvironment.
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