[Progress on genome-wide association studies on mosaic chromosomal alterations]

Area of Science:

• Genetics
• Genomics
• Aging Research

Background:

• Mosaic chromosomal alterations (mCA) represent large-scale somatic mutations contributing to diverse karyotypes and are a phenotype of aging.
• mCA is associated with chronic diseases like hematopoietic cancers and cardiovascular diseases, yet its genetic underpinnings remain largely unexplored.
• Understanding the genetic susceptibility variants for mCA is crucial for disease risk assessment and therapeutic strategies.

Approach:

• This paper reviews Genome-Wide Association Studies (GWAS) investigating genetic susceptibility loci for mCA.
• The review covers both autosomal chromosome mCAs and sex chromosome mCAs, specifically mosaic loss of the Y chromosome (mLOY) and mosaic loss of the X chromosome (mLOX).
• The analysis is based on large population studies to identify robust genetic associations.

Key Points:

• Genetic loci for autosomal mCA are predominantly linked to copy-neutral loss of heterozygosity.
• Sex chromosome mCA research has focused on mosaic loss mutations.
• Numerous genetic susceptibility loci (up to 156) have been identified for mLOY, while fewer have been found for mLOX.

Conclusions:

• GWAS have identified significant genetic loci associated with autosomal and sex chromosome mCAs.
• The genetic architecture of mLOY is more extensively characterized than that of mLOX.
• Further research into the genetic basis of mCA is warranted to elucidate its role in aging and disease.