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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Related Experiment Video

Updated: Jan 13, 2026

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
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A Single-cell Transcriptome-wide Association Study Reveals Susceptibility Genes for Age-related Hearing Loss.

Yuanfeng Li1, Tao Zeng2, Wenyu Song1

  • 1State Key Laboratory of Medical Proteomics, National Center for Protein Sciences at Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 100850, China.

Genomics, Proteomics & Bioinformatics
|January 6, 2026
PubMed
Summary

This study identified new genes and cell types linked to age-related hearing loss (ARHL) using a large-scale genetic analysis. Findings may guide future treatments and prevention strategies for ARHL.

Keywords:
Age-related hearing lossDrug targetGenetic factorSingle-cell transcriptome-wide association studySusceptibility gene

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Area of Science:

  • Genetics
  • Otolaryngology
  • Molecular Biology

Background:

  • Age-related hearing loss (ARHL) is the most prevalent form of hearing impairment.
  • Genetic factors significantly contribute to the development of ARHL.

Purpose of the Study:

  • To identify novel susceptibility genes and specific cell types associated with ARHL.
  • To explore potential therapeutic targets for ARHL through genetic association studies.

Main Methods:

  • A two-stage single-cell transcriptome-wide association study (scTWAS) was conducted.
  • Utilized data from 96,372 ARHL cases and 141,590 controls of European descent.

Main Results:

  • Identified 1034 gene-cell pairs and 450 genes associated with ARHL, enriched in immune, estrogen signaling, and oxidative damage pathways.
  • Validated 41 significant gene associations, including known genes like HLA-DRA and novel candidates such as TNF, ZC3HAV1, and SLC44A4.
  • Provided genetic evidence for drug repurposing candidates like NR3C2, CHRM4, and SHBG.

Conclusions:

  • The scTWAS expands the understanding of genetic underpinnings of ARHL.
  • Findings offer potential avenues for developing new treatments and preventive measures for age-related hearing loss.