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Hair interior defect in AKR/J mice
1Department of Dermatology, Ludwig Maximilian University, Munich, Germany.
Clinical and Experimental Dermatology
|June 16, 2009
Summary
Researchers identified a novel hair interior defect (HID) in AKR/J mice, caused by an autosomal recessive mutation. The hid locus was mapped to mouse chromosome 1, potentially revealing insights into human hair disorders.
Area of Science:
- Genetics
- Dermatology
- Molecular Biology
Background:
- AKR/J mice exhibit a subtle hair fiber defect affecting the central portion, observable via light microscopy.
- This defect, termed hair interior defect (HID), necessitates further characterization.
Purpose of the Study:
- To characterize the clinical and ultrastructural features of the HID phenotype.
- To determine the chromosomal localization of the hid mutant gene locus.
Main Methods:
- Utilized light microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) for phenotypic characterization.
- Employed complementation testing and gene-linkage studies for locus mapping.
Main Results:
- SEM and TEM revealed no surface or sulfur content differences, but TEM showed medullary degenerative changes.
- An autosomal recessive mutation, HID (locus symbol: hid), was identified.
- The hid locus was mapped to the distal end of mouse chromosome 1, excluding Lbr.
Conclusions:
- A novel gene or a known gene with a novel phenotype is located within the mapped interval on chromosome 1.
- This finding may offer insights into human diseases affecting the inner hair fiber structure.
