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Cancer-Critical Genes II: Tumor Suppressor Genes01:05

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Rare Coding Variants Associated with Breast Cancer.

Mi-Ryung Han1

  • 1Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon, South Korea. genetic0309@inu.ac.kr.

Advances in Experimental Medicine and Biology
|May 13, 2021
PubMed
Summary
This summary is machine-generated.

Investigating rare genetic variants is crucial for understanding breast cancer heritability beyond common variants. Future studies will use advanced methods to clarify the role of these low-frequency variants in breast cancer risk.

Keywords:
Breast cancerGenome-wide association studies (GWAS)Rare coding variant

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Area of Science:

  • Genetics
  • Oncology
  • Bioinformatics

Background:

  • Breast cancer is a leading global cancer in females, with common genetic variants explaining only a fraction of its heritability.
  • Genome-wide association studies (GWAS) have identified common variants, but a significant portion of breast cancer heritability remains unexplained.
  • Rare and low-frequency genetic variants may hold keys to understanding the remaining heritability and genetic predisposition to breast cancer.

Purpose of the Study:

  • To highlight the importance of investigating rare and low-frequency genetic variants in GWAS-identified loci for breast cancer risk.
  • To emphasize the potential functional significance of rare variants compared to common variants in coding regions.
  • To outline future research directions for a comprehensive understanding of genetic contributions to breast cancer.

Main Methods:

  • Review of existing literature on genome-wide association studies (GWAS) and genetic variants in breast cancer.
  • Discussion of the functional implications of variant allele frequency in coding regions.
  • Proposal for future research employing sequencing technology, expression quantitative trait loci (eQTL) studies, and advanced statistical methods.

Main Results:

  • Common variants identified by GWAS explain only about 16% of breast cancer heritability.
  • Rare variants, particularly in coding regions, are hypothesized to be more likely to be functional than common variants.
  • Further investigation is needed to quantify the contribution of rare variants to breast cancer risk.

Conclusions:

  • Examining rare and low-frequency variants in GWAS-identified loci is essential for a complete understanding of breast cancer heritability.
  • Future studies should incorporate advanced techniques to accurately estimate the impact of both additive and recessive genetic variants.
  • A comprehensive approach using large sample sizes and modern methodologies will improve the estimation of rare variant contributions to breast cancer.