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The keratins and their disorders.
Elizabeth L Rugg1, Irene M Leigh
1Department of Dermatology, University of California Irvine, 92697-2400, USA. erugg@uci.edu
American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
|September 29, 2004
Summary
Mutations in keratin intermediate filament (IF) genes cause diseases by compromising cell structural integrity. This leads to cell fragility and various skin and mucosal disorders.
Area of Science:
- Molecular biology
- Genetics
- Dermatology
Background:
- Keratin intermediate filaments (IFs) are crucial for cellular structural integrity.
- Mutations in keratin genes disrupt IF assembly and function.
- This disruption underlies a spectrum of human diseases.
Purpose of the Study:
- To define the molecular basis of keratin disorders.
- To categorize diseases caused by keratin intermediate filament gene mutations.
- To highlight the diverse clinical manifestations resulting from keratinopathies.
Main Methods:
- Analysis of genetic mutations in keratin intermediate filament (IF) genes.
- In vivo studies examining cellular structural integrity.
- Histopathological examination of affected tissues.
Main Results:
- Keratin gene mutations lead to a loss of cellular structural integrity.
- Manifestations include cell fragility, epidermal hyperkeratosis, and IF aggregation.
- Identified keratin disorders include epidermolysis bullosa simplex (EBS), bullous congenital ichthyosiform erythroderma (BCIE), and pachyonychia congenita (PC).
Conclusions:
- Keratin disorders represent a distinct molecular category of diseases.
- These disorders result from impaired keratin intermediate filament function.
- A range of phenotypes, from skin blistering to mucosal lesions, are associated with keratinopathies.