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Updated: Jul 8, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
Identifying genes predisposing to atopic eczema
1Murdoch Institute for Research into Birth Defects, Parkville, Victoria, Australia.
Researchers identified a gene predisposing to atopic eczema on chromosome 5q31. This finding helps define genetic factors for atopic diseases, distinguishing general predisposition loci from those determining specific phenotypes.
Area of Science:
- Genetics and immunology
- Dermatology
- Allergy research
Background:
- Atopic diseases like asthma and eczema result from genetic and environmental factors.
- The specific gene(s) responsible for atopy remain undefined.
- Identifying genetic predispositions is challenging due to heterogeneity and bias.
Purpose of the Study:
- To identify specific genes predisposing to atopic eczema.
- To investigate candidate regions on chromosomes 5q31, 11q13, 14q11.2, and 16p12.
Main Methods:
- Studied nuclear families with early-onset atopic eczema.
- Analyzed linkage for candidate regions including the IL gene cluster (5q31) and IL-4 receptor alpha-chain (IL4RA).
- Employed recessive genetic models and transmission disequilibrium tests.
Main Results:
- Found significant linkage (LOD score 2.25, nonparametric score 2.54) to a region on chromosome 5q31.
- Postulated the presence of an atopic eczema predisposing gene in this 5q31 region.
- Did not find linkage to 11q13 or association with candidate polymorphisms in mast cell chymase and IL4RA genes.
Conclusions:
- Identified a clinically homogeneous cohort for genetic factor discovery.
- Postulate distinct loci for general atopy predisposition and specific phenotype determination.
- The 5q31 region is a key area for further investigation into atopic eczema genetics.
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