Grant Number:	5U19CA214253-06 Interpret this number
Primary Investigator:	Haiman, Christopher
Organization:	University Of Southern California
Project Title:	Research on Prostate Cancer in Men of African Ancestry: Defining the Roles of Genetics, Immunity and Stress (RESPOND)
Fiscal Year:	2023

Abstract – Program Project Overview African American (AA) men have a >60% higher incidence and are more likely to be diagnosed with aggressive PCa than white men. Reasons for the greater burden of aggressive disease in AA men are unknown, but are likely to include a multitude of factors including social factors such as lifetime stress, inherited susceptibility, and tumor-related features such as somatic alterations and local inflammation in the microenvironment. The overarching goal of this Program Project is to uncover the social and biological factors that are related to PCa aggressiveness in AA men. To accomplish this objective, we will establish a large, national, population-based cohort study, RESPOND, (Research on Prostate Cancer in Men of African Ancestry: Defining the Roles of Genetics, Immunity and Social Stress) of 10,000 AA men with incident PCa identified through nine SEER and NPCR U.S. cancer registries from states that include 38% of all AA PCa cases in the U.S.. The cohort will provide comprehensive information on multilevel stressors over the lifecourse such as discrimination, early-life adversity, and neighborhood disorder, including geospatial neighborhood data over time and degree of perceived stress; 2) lifestyle factors and health behaviors; 3) disease-specific factors including PSA screening history and treatment choice; 4) germline DNA to study genetic susceptibility, and 5) tumor block samples for characterization of somatic variation and immune profiling of the tumor microenvironment. No previous study has attempted to obtain information across these domains in a single large sample in order to understand the relative contribution of each and relationships between molecular and non-genetic components. In order to address these goals, we have assembled a multi-disciplinary team of scientists and clinicians with established track records in PCa research. Leveraging the RESPOND resource and investigator expertise, we have designed a Program Project composed of four Projects that are supported by four Cores which are all focused on the central theme of identifying social and biological factors related to PCa disease aggressiveness in AA men. These Projects include: the investigation of multilevel social stressors across the lifecourse in relationship with aggressive PCa (Project 1); genome-wide discovery efforts of germline susceptibility loci for aggressive PCa and examination of the relationship between germline and somatic variation (Project 2); the identification of underlying somatic alterations in PCa tumors and biological pathways that are related to aggressive disease (Project 3); and, a detailed assessment of inflammation in the tumor microenvironment as it relates to PCa aggressiveness in AA men (Project 4). Each of the four Projects address a distinct research domain, however, when studied together, create scientific synergy and a far more comprehensive picture of the major factors that contribute to aggressive PCa in AA men. The information we will discover is likely to have immediate clinical implications in the areas of improved patient stratification and personalized medicine. Hence, this study has broad reaching significance and addresses numerous challenges in the clinical management of PCa in AA men.




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