894 Towards a genetically- and phenotypically-relevant mouse model for pachyonychia congenita

نویسندگان

چکیده

Pachyonychia congenita(PC) is a rare disorder that features palmoplantar keratoderma(PPK) as its most significant symptom. PPK are thick calluses arising in palmar and plantar skin painful to the point of debilitation PC related disorders. caused by dominantly-acting small mutations affect coding sequence KRT6A, KRT6B, KRT6C, KRT16 or KRT17. Unlike case for many other keratinopathies, cell fragility not key driver genesis lesions PC. There currently no effective treatment this disorder. We previously generated mouse strain, Krt16 null, develops PC-like footpad (J. Invest. Dermatol. 132:1384-91, 2012). The study these mice has yielded novel insight into pathophysiology However, given cases involve missense alleles genes, Krt16null genetically relevant nor they amenable developing testing mutant allele-specific therapies. To address deficiency, we used CRISPR-Cas9 introduce R123C mutation gene mice. This allele accounts >20% KRT16-based (33/157) associated with classic presentation. shows Mendelian inheritance does compromise viability offspring. At 5 months age, homozygous show raised footpads but do feature obvious hyperkeratosis acanthosis upon histological examination skin. These findings contrast null mice, which frequently die pre-weaning (66% penetrance) develop striking PPK-like two age (100% penetrance). Further analysis will shed new light enigmatic represents.

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ژورنال

عنوان ژورنال: Journal of Investigative Dermatology

سال: 2023

ISSN: ['1523-1747', '0022-202X']

DOI: https://doi.org/10.1016/j.jid.2023.03.904