Related Experiment Video
Updated: Apr 6, 2026
06:07
Author Spotlight: Advancements in Cultivating Mouse Hair Cells for Auditory Research
Published on: September 15, 2023
3.9K
Genome-wide association analysis on normal hearing function identifies PCDH20 and SLC28A3 as candidates for hearing
Dragana Vuckovic1, Sally Dawson2, Deborah I Scheffer3
1Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste 34100, Italy.
Human Molecular Genetics
|July 19, 2015
Summary
This study identifies two new genetic loci, PCDH20 and SLC28A3, influencing normal hearing ability. These findings advance our understanding of the genetic basis of auditory function and individual hearing differences.
Area of Science:
- Genetics
- Auditory Science
- Human Physiology
Background:
- Hearing loss and normal hearing variations have significant genetic components.
- While genes for deafness are known, those affecting normal hearing range are less understood.
Purpose of the Study:
- To identify genes and variants that modulate normal hearing ability.
- To investigate the genetic architecture of human hearing thresholds.
Main Methods:
- Two-stage meta-analysis of hearing thresholds in isolated populations (N=2636).
- Replication analysis in independent cohorts (N=6162).
- RT-PCR and RNA-Seq to confirm gene expression in the mouse inner ear.
Main Results:
- Identified two genome-wide significant loci near PCDH20 and SLC28A3 (rs78043697, rs7032430).
- Successfully replicated these findings in independent cohorts.
- Confirmed expression of PCDH20 and SLC28A3 in mouse inner ear hair cells.
Conclusions:
- PCDH20 and SLC28A3 are potential modulatory genes for auditory function.
- Variations in regulatory sequences, not coding regions, may influence gene expression and hearing.
- This research enhances understanding of the genetic mechanisms of human hearing.
Related Concept Videos
01:11Genome-wide Association Studies-GWAS
16.7K
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.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
16.7K
01:33Pleiotropy
44.1K
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,...
44.1K
01:29Pharmacogenomics: Identification of New Drug Targets
86
Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
86
03:14Notch Signaling Pathway
6.9K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
6.9K