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Keratin 16-null mice develop palmoplantar keratoderma, a hallmark feature of pachyonychia congenita and related disorders.
- Source :
-
The Journal of investigative dermatology [J Invest Dermatol] 2012 May; Vol. 132 (5), pp. 1384-91. Date of Electronic Publication: 2012 Feb 16. - Publication Year :
- 2012
-
Abstract
- Keratin 16 (KRT16 in human, Krt16 in mouse), a type I intermediate filament protein, is constitutively expressed in epithelial appendages and is induced in the epidermis upon wounding and other stressors. Mutations altering the coding sequence of KRT16 cause pachyonychia congenita (PC), a rare autosomal dominant disorder characterized by hypertrophic nail dystrophy, oral leukokeratosis, and palmoplantar keratoderma (PPK). PPK associated with PC is extremely painful and compromises patient mobility, making it the most debilitating PC symptom. In this study, we show that, although inherited in a recessive manner, the inactivation of Krt16 in mice consistently causes oral lesions as well as PPK-like hyperkeratotic calluses on Krt16(-/-) front and hind paws, which severely compromise the animals' ability to walk. Our findings call into question the view that PC-related PPK arises exclusively as a gain-of-function on account of dominantly acting mutated keratins, and highlight the key role of modifiers in the clinical heterogeneity of PC symptoms.
- Subjects :
- Animals
Epithelium metabolism
Female
Keratin-17 genetics
Keratin-17 metabolism
Keratin-6 metabolism
Locomotion
Male
Mice
Mice, Knockout
Mutation
Pachyonychia Congenita genetics
Tongue metabolism
Keratin-16 genetics
Keratoderma, Palmoplantar genetics
Keratoderma, Palmoplantar pathology
RNA, Messenger metabolism
Tongue pathology
Subjects
Details
- Language :
- English
- ISSN :
- 1523-1747
- Volume :
- 132
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- The Journal of investigative dermatology
- Publication Type :
- Academic Journal
- Accession number :
- 22336941
- Full Text :
- https://doi.org/10.1038/jid.2012.6