Immunoprophylactic and immunotherapeutic control of hormone receptor-positive breast cancer.

ABSTRACT: Hormone receptor (HR)⁺ breast cancer (BC) causes most BC-related deaths, calling for improved therapeutic approaches. Despite expectations, immune checkpoint blockers (ICBs) are poorly active in patients with HR⁺ BC, in part reflecting the lack of preclinical models that recapitulate disease progression in immunocompetent hosts. We demonstrate that mammary tumors driven by medroxyprogesterone acetate (M) and 7,12-dimethylbenz[a]anthracene (D) recapitulate several key features of human luminal B HR⁺HER2^- BC, including limited immune infiltration and poor sensitivity to ICBs. M/D-driven oncogenesis is accelerated by immune defects, demonstrating that M/D-driven tumors are under immunosurveillance. Safe nutritional measures including nicotinamide (N

SUBMITTER: Buque A 

PROVIDER: S-EPMC7393498 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature