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Array Comparative Genomic Hybridization Array CGH for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
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Genome-wide association study identified copy number variants important for appendicular lean mass
Shu Ran1, Yong-Jun Liu2, Lei Zhang1
1Center of System Biomedical Sciences, University of Shanghai for Science and Technology, Shanghai, People's Republic of China.
Plos One
|March 15, 2014
Summary
Two novel copy number variations (CNVs) were identified to influence appendicular lean mass (ALM), a key component of skeletal muscle. These genetic variations, CNV1191 and CNV2580, highlight potential genetic factors contributing to muscle mass regulation.
Area of Science:
- Genetics
- Human Physiology
- Molecular Biology
Background:
- Skeletal muscle mass and function decline with age, contributing to conditions like sarcopenia and osteoporosis.
- Appendicular lean mass (ALM), a primary component of skeletal muscle, is recognized as a heritable trait.
- Copy number variations (CNVs) are significant genomic alterations implicated in the etiology of various human diseases.
Purpose of the Study:
- To investigate the association between copy number variations (CNVs) and appendicular lean mass (ALM).
- To identify specific CNVs and related genes that contribute to variations in ALM.
Main Methods:
- Genome-wide association analyses were conducted to identify CNVs associated with ALM in a Caucasian cohort (n=2,286).
- Key findings were replicated in an independent Chinese cohort (n=1,627).
- Gene content analysis was performed for identified CNVs.
Main Results:
- Two CNVs, designated CNV1191 and CNV2580, demonstrated a statistically significant association with ALM in the Caucasian sample.
- Replication analysis in the Chinese cohort showed consistent, though not all statistically significant, associations for both CNVs.
- CNV1191 encompasses the GIMAP1 gene, crucial for skeletal muscle cell survival and death.
- CNV2580 is located within the SERHL gene, involved in peroxisome function and skeletal muscle response to mechanical stimuli.
Conclusions:
- The study identified two novel CNVs (CNV1191 and CNV2580) associated with variations in appendicular lean mass (ALM).
- The identified genes, GIMAP1 and SERHL, are implicated as potential contributors to ALM regulation and skeletal muscle health.
- These findings provide new insights into the genetic underpinnings of skeletal muscle mass variation.
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