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Colorectal Screening Strategies in Underserved Populations

ABSTRACT: Research efforts are necessary to identify strategies to increase colorectal screening in underserved patient populations. Racial, ethnic minorities and medically underserved individuals continue to experience disparities in colorectal cancer mortality despite the availability of screening tests that can detect tumors early when treatments are most effective.

DISEASE(S): Colorectal Cancer,Colorectal Neoplasms

PROVIDER: 2394515 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Addressing Disparities in Colorectal Cancer Screening in Black and Underserved Phoenix Communities

Project description:This clinical trial studies disparities involving colorectal cancer prevention and screening in Black and underserved communities in the Phoenix metropolitan area. The Black community is disproportionately impacted by colorectal cancer, with the highest rate of any racial/ethnic group in the United States. There are complex reasons behind these disparities, largely related to socioeconomic factors and healthcare access. Providing access to free, home-based fecal immunochemical testing (FIT), colorectal screening education, and appropriate follow-up to predominantly Black community-based organizations and underserved communities may help to close this gap.

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Cardiac DNA Methylation Underlies Racial and Socioeconomic Disparities among Patients with End-Stage Heart Failure (RNA-seq)

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Cardiac DNA Methylation Underlies Racial and Socioeconomic Disparities among Patients with End-Stage Heart Failure (MethylationEPIC array)

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Improving Cancer Screening and Prevention During the COVID-19 Pandemic in Underserved Populations of Rhode Island

Project description:Lifespan Cancer Institute serves over 50% of cancer patients in the state. Rhode Island is known for strong medical care and high rates of cancer screening with mammography and colonoscopy. However, cancer screening has plummeted during the COVID-19 pandemic, in part to closing physician offices and stopping non-urgent medical procedures. In addition, anecdotal reports suggest the public remains concerned about returning to physician’s offices and risking possible exposure to COVID-19. As in the United States as a whole, COVID-19 has disproportionately impacted ethnic and minority individuals within underserved communities; and in Rhode Island, African Americans, Hispanics and undocumented individuals living in communities such as Central Falls, Pawtucket, Providence, East Providence and North Providence have had the highest rate of COVID-19. These communities are also impacted by healthcare disparities to access and affordability of healthcare, and as such, may be among the least likely to resume cancer screening. The Lifespan Cancer Institute will institute a project to address health disparities in cancer screening during the pandemic through the use of a targeted campaign involving social media. The goals will be to re-establish screening in the era of COVID-19 and ensure timeliness of care for those found to be at risk, or are positive for, cancer.

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Molecular Disparities in Colorectal Cancers of White Americans, Alabama African Americans, and Oklahoma American Indians

Project description:In the US, the majority of cancer samples analyzed are from white people, leading to biases in racial and ethnic treatment outcomes. Colorectal cancer (CRC) incidence and mortality rates are high in Alabama African Americans (AAs) and Oklahoma American Indians (AIs). We hypothesized that differences between racial groups may partially explain these disparities. Thus, we compared transcriptomic profiles of CRCs of Alabama AAs, Oklahoma AIs, and white people from both states. Compared to CRCs of white people, CRCs of AAs showed (a) higher expression of cytokines and vesicle trafficking toward modulated antitumor-immune activity, and (b) lower expression of the ID1/BMP/SMAD axis, IL22RA1, APOBEC3, and Mucins; and AIs had (c) higher expression of PTGS2/COX2 (an NSAID target/pro-oncogenic inflammation) and splicing regulators, and (d) lower tumor suppressor activities (e.g., TOB2, PCGF2, BAP1). Therefore, targeting strategies designed for white CRC patients may be less effective for AAs/AIs. These findings illustrate needs to develop optimized interventions to overcome racial CRC disparities.

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Rapid Acceleration of Diagnostics - Underserved Populations (RADx-UP): Eliminating COVID-19 Disparities in Arizona in Partnership with Vulnerable/Underserved Communities

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Genome-wide variation of cytosine modifications between European and African populations and the implications for complex traits

Project description:Elucidating cytosine modification difference between human populations can enhance our understanding of ethnic specificity in complex traits such as disease predisposition and drug response. In this study, cytosine modification levels in 133 HapMap lymphoblastoid cell lines (LCLs) derived from individuals of European or African ancestry were profiled using the Illumina HumanMethylation450 BeadChip. Approximately 13% of the analyzed CpG sites showed differential modification between the two populations at false discovery rate (FDR) of 1%. CpG sites with greater modification levels in European descents were enriched in the proximal regulatory regions, while those greater in African descents were biased toward gene bodies. More than half of the detected population-specific cytosine modifications could be explained by genetic variation. A substantial proportion of local modification quantitative trait loci (mQTL) exhibited population-specific effects, suggesting that genetic epistasis and/or genotype × environment interaction could be common. Distinct inter-individual correlations were observed between gene expression and cytosine modifications in both proximal promoters and gene bodies, demonstrating a regulatory role of inter-individual variation in cytosine modification. Furthermore, a number of SNPs (single nucleotide polymorphisms) previously identified for complex traits with known racial disparities could be annotated as mQTLs for population-specific CpGs. Our findings revealed abundant population-specific cytosine modifications and the underlying genetic basis, as well as the relatively independent contribution of genetic and epigenetic variations to population differences in gene expression. 60 HapMap CEU and 73 HapMap YRI samples from Coriell Insitute were profiled for cytosine modification levels.

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