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Published on: November 15, 2013

Nuclear receptor coregulator SNP discovery and impact on breast cancer risk

Ryan J Hartmaier1, Sandrine Tchatchou, Alexandra S Richter

  • 1Program in Translational Biology & Molecular Medicine, Baylor College of Medicine, Houston, TX 77030, USA. hartmaie@bcm.edu

BMC Cancer
|December 17, 2009
PubMed
Abstract

Insights

Genetic variations in coregulator genes, particularly SRC-3, are linked to breast cancer risk. This study identified novel single nucleotide polymorphisms (SNPs) and confirmed a protective effect for one SRC-3 SNP, highlighting coregulators

Area of Science:

  • Genetics
  • Molecular Biology
  • Oncology

Background:

  • Coregulator proteins are crucial for gene regulation in normal physiology and hormone-driven diseases like breast cancer.
  • Genetic alterations in coregulator genes are implicated in disease development, but their specific impact remains largely unknown.
  • This study focused on identifying and evaluating single nucleotide polymorphisms (SNPs) in key coregulator genes.

Purpose of the Study:

  • To identify novel single nucleotide polymorphisms (SNPs) in the coregulator genes SRC-1 (NCoA1), SRC-3 (NCoA3), NCoR (NCoR1), and SMRT (NCoR2).
  • To assess the association of identified SNPs with breast cancer risk in a case-control cohort.

Main Methods:

  • Sequencing of coding regions of target genes in 96 normal individuals to identify novel SNPs.
  • Genotyping of five selected SNPs in 1218 breast cancer cases and 1509 controls.
  • Statistical analysis to determine the association between SNPs and breast cancer risk.

Main Results:

  • Identified 74 novel SNPs across the four coregulator genes, with 8 having a minor allele frequency >5%.
  • Confirmed a previously observed protective association for SNP rs2230782 in SRC-3 (OR = 0.45, p = 0.04).
  • No significant associations were found for the other genotyped SNPs with breast cancer risk.

Conclusions:

  • Coregulator proteins, especially SRC-3, play a significant role in breast cancer development.
  • The identified SNPs represent genetic diversity within coregulator genes, warranting further investigation.
  • Further functional studies are recommended to elucidate the role of SRC-3 in breast cancer.

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