Body composition as a determinant of the therapeutic index with androgen signaling inhibition
- PMID: 39019979
- DOI: 10.1038/s41391-024-00870-8
Body composition as a determinant of the therapeutic index with androgen signaling inhibition
Abstract
Background: Androgen signaling is central to prostate cancer and men's health. Prior data indicates that increasing body fat is unfavorable in the localized setting yet associated with favorable outcomes in men with metastatic disease. Understanding the biological links between adiposity and prostate cancer may optimize the therapeutic index with ASI. We hypothesized that host adiposity and androgen synthesis are linked to the efficacy and toxicity of ASI for men with metastatic castration-resistant prostate cancer (mCRPC).
Methods: A post-hoc analysis was done of NCT02703623 where men with mCRPC (n = 186) were treated for 8 weeks with abiraterone acetate, prednisone, and apalutamide (AAPA), and a satisfactory response was defined as a PSA decline >50%. Body composition was measured on baseline CT scans. Germline DNA WES was performed with a focus on variants in steroidogenic genes. Adipokine levels were measured in pre-treatment plasma.
Results: Germline polymorphisms in 3 genes involved in androgen synthesis (AKR1C3 rs12529, CYP17A1 rs6162, SRD5A2 rs523349) were associated with differences in body composition at baseline on ADT alone (prior to receipt of AAPA). Elevated subcutaneous adipose tissue index (SATi, p = 0.02), visceral adipose tissue index (VATi, p = 0.03), and BMI (p = 0.04) were associated with satisfactory response to AAPA. Leptin had positive correlation with VATi (r = 0.47) and SATi (r = 0.48).
Conclusion: Inherited polymorphisms in androgen synthesis correlated with differences in body composition after exposure to ADT and warrant further investigation as candidate markers for body composition toxicity. Elevated subcutaneous and visceral adiposity were associated with improved response to ASI.
© 2024. The Author(s), under exclusive licence to Springer Nature Limited.
Conflict of interest statement
Competing interests: AWH reports advisory board consulting for Johnson & Johnson Innovative Medicine, Intellisphere, Exelixis, and Eisai; honoraria from Medscape and Binaytara Foundation; travel support from DAVA Oncology, and institutional research funding from Bayer and Eisai. PGP has received honoraria for service on scientific advisory board for Janssen and AstraZeneca. JRG is a consultant and advisory board member for Bayer. BAS reports advisory board consulting to Merck, travel support from Merck, and institutional research funding from Regeneron. PM has received honoraria for service on a Scientific Advisory Board for Mirati Therapeutics, Bristol Myers Squibb, and Exelixis; consulting for Axiom Healthcare Strategies; non-branded educational programs supported by DAVA Oncology, Exelixis and Pfizer; and research funding for clinical trials from Takeda, Bristol Myers Squibb, Mirati Therapeutics, Gateway for Cancer Research, and the University of Texas MD Anderson Cancer Center. JLM reports honorari from Merck, Bristol-Myers Squibb, and Novartis. CJL reports honoraria from Bayer, Amgen, Novartis, Boehringer Ingelheim, Merck Sharp & Dohme, and Exelixis; and institutional research funding from Janssen, ORIC Pharmaceuticals, Novartis, and Aragon Pharmaceuticals. DEF has received research funding from GTx, Inc, and has a familial relationship with Biocity Biopharmaceuticals, Hummingbird Bioscience, Bellicum Pharmaceuticals, Maia Biotechnology, Alms Therapeutics, Hinova Pharmaceuticals, and Barricade Therapeutics. Ethics approval and consent to participate: This research involving human subjects, human material, and human data is in accordance with the Declaration of Helsinki. Informed consent was obtained from subjects. The research reported here was approved by The University of Texas MDACC Institutional Review Board (PA16-0736 2014-0386, LAB02-152).
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