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Mutations in CSTA, encoding cystatin A, underlie exfoliative ichthyosis and reveal a role for this protease inhibitor in cell-cell adhesion

Autosomal-recessive exfoliative ichthyosis presents shortly after birth as dry, scaly skin over most of the body with coarse peeling of nonerythematous skin on the palms and soles, which is exacerbated by excessive moisture and minor trauma. Using whole-genome homozygosity mapping, candidate-gene an...

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Hauptverfasser: Blaydon, Diana C. (VerfasserIn) , Nitoiu, Daniela (VerfasserIn) , Eckl, Katja-Martina (VerfasserIn) , Cabral, Rita M. (VerfasserIn) , Bland, Philip (VerfasserIn) , Haußer-Siller, Ingrid (VerfasserIn) , van Heel, David A. (VerfasserIn) , Rajpopat, Shefali (VerfasserIn) , Fischer, Judith (VerfasserIn) , Oji, Vinzenz (VerfasserIn) , Zvulunov, Alex (VerfasserIn) , Traupe, Heiko (VerfasserIn) , Hennies, Hans Christian (VerfasserIn) , Kelsell, David P. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 22 September 2011
In: The American journal of human genetics
Year: 2011, Jahrgang: 89, Heft: 4, Pages: 564-571
ISSN:1537-6605
DOI:10.1016/j.ajhg.2011.09.001
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ajhg.2011.09.001
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0002929711003910
Volltext
Verfasserangaben:Diana C. Blaydon, Daniela Nitoiu, Katja-Martina Eckl, Rita M. Cabral, Philip Bland, Ingrid Hausser, David A. van Heel, Shefali Rajpopat, Judith Fischer, Vinzenz Oji, Alex Zvulunov, Heiko Traupe, Hans Christian Hennies, and David P. Kelsell
Beschreibung
Zusammenfassung:Autosomal-recessive exfoliative ichthyosis presents shortly after birth as dry, scaly skin over most of the body with coarse peeling of nonerythematous skin on the palms and soles, which is exacerbated by excessive moisture and minor trauma. Using whole-genome homozygosity mapping, candidate-gene analysis and deep sequencing, we have identified loss-of-function mutations in the gene for protease inhibitor cystatin A (CSTA) as the underlying genetic cause of exfoliative ichthyosis. We found two homozygous mutations, a splice-site and a nonsense mutation, in two consanguineous families of Bedouin and Turkish origin. Electron microscopy of skin biopsies from affected individuals revealed that the level of detachment occurs in the basal and lower suprabasal layers. In addition, in vitro modeling suggests that in the absence of cystatin A protein, there is a cell-cell adhesion defect in human keratinocytes that is particularly prominent when cells are subject to mechanical stress. We show here evidence of a key role for a protease inhibitor in epidermal adhesion within the lower layers of the human epidermis.
Beschreibung:Gesehen am 30.03.2022
Beschreibung:Online Resource
ISSN:1537-6605
DOI:10.1016/j.ajhg.2011.09.001

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