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Alpha-actin-2 mutations in Chinese patients with a non-syndromatic thoracic aortic aneurysm

Tie Ke1,2, Meng Han1,2, Miao Zhao1,2

  • 1The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China.

BMC Medical Genetics
|July 20, 2016
PubMed

Insights

Researchers identified three novel ACTA2 gene mutations in Chinese patients with thoracic aortic aneurysms and/or dissection (TAADs). This study highlights ACTA2 as a key gene in non-syndromic TAADs and demonstrates the effectiveness of HRM analysis for genetic screening.

Area of Science:

  • Genetics
  • Cardiovascular Diseases
  • Molecular Biology

Background:

  • Thoracic aortic aneurysms and/or dissection (TAADs) are significant causes of mortality.
  • Genetic data on non-syndromic TAADs, particularly in Asian populations, are limited.
  • Understanding the genetic underpinnings of TAADs is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate the genetic basis of non-syndromic TAADs in a Chinese population.
  • To identify specific gene mutations associated with TAADs in this cohort.
  • To evaluate the prevalence of mutations in commonly implicated TAAD genes.

Main Methods:

  • Screening of 68 familial non-syndromic TAAD Chinese patients for mutations in ACTA2, MYH11, TGFBR1, TGFBR2, and SMAD3 using high-resolution melting (HRM) analysis.
  • Analysis of 142 unrelated sporadic non-syndromic TAAD cases using HRM to determine mutation prevalence.
  • Comparison of identified mutations against a control group of 480 subjects.

Main Results:

  • Three novel ACTA2 mutations (N117I, L348R, Y168N) were identified in TAAD patients.
  • These ACTA2 mutations were absent in the control population.
  • No mutations were found in the other candidate genes (MYH11, TGFBR1, TGFBR2, SMAD3) within this cohort.

Conclusions:

  • Novel ACTA2 mutations are a predominant cause of non-syndromic TAADs in the studied Chinese population.
  • The findings contribute to elucidating the genetic architecture of TAADs.
  • HRM analysis proved to be an effective, high-throughput method for genetic mutation screening in TAADs.
Abstract

Keywords:
ACTA2Chinese populationGene mutationThoracic aortic aneurysm and dissection

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