Mutations in CSTA, Encoding Cystatin A, Underlie Exfoliative Ichthyosis and Reveal a Role for this Protease Inhibitor in Cell-Cell Adhesion

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, David P Kelsell

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)564-571
Number of pages8
JournalAmerican Journal of Human Genetics
Volume89
Issue number4
Early online date22 Sep 2011
DOIs
Publication statusPublished - 7 Oct 2011
Externally publishedYes

Fingerprint

Cystatin A
Ichthyosis
Protease Inhibitors
Cell Adhesion
Skin
Mutation
High-Throughput Nucleotide Sequencing
Mechanical Stress
Nonsense Codon
Chromosome Mapping
Genetic Association Studies
Keratinocytes
Epidermis
Electron Microscopy
Parturition
Biopsy
Wounds and Injuries
Genes
Proteins

Cite this

Blaydon, Diana C ; Nitoiu, Daniela ; Eckl, Katja-Martina ; Cabral, Rita M ; Bland, Philip ; Hausser, Ingrid ; van Heel, David A ; Rajpopat, Shefali ; Fischer, Judith ; Oji, Vinzenz ; Zvulunov, Alex ; Traupe, Heiko ; Hennies, Hans Christian ; Kelsell, David P. / Mutations in CSTA, Encoding Cystatin A, Underlie Exfoliative Ichthyosis and Reveal a Role for this Protease Inhibitor in Cell-Cell Adhesion. In: American Journal of Human Genetics. 2011 ; Vol. 89, No. 4. pp. 564-571.
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abstract = "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.",
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Blaydon, DC, Nitoiu, D, Eckl, K-M, Cabral, RM, Bland, P, Hausser, I, van Heel, DA, Rajpopat, S, Fischer, J, Oji, V, Zvulunov, A, Traupe, H, Hennies, HC & Kelsell, DP 2011, 'Mutations in CSTA, Encoding Cystatin A, Underlie Exfoliative Ichthyosis and Reveal a Role for this Protease Inhibitor in Cell-Cell Adhesion', American Journal of Human Genetics, vol. 89, no. 4, pp. 564-571. https://doi.org/10.1016/j.ajhg.2011.09.001

Mutations in CSTA, Encoding Cystatin A, Underlie Exfoliative Ichthyosis and Reveal a Role for this Protease Inhibitor in Cell-Cell Adhesion. / Blaydon, Diana C; Nitoiu, Daniela; Eckl, Katja-Martina; Cabral, Rita M; Bland, Philip; Hausser, Ingrid; van Heel, David A; Rajpopat, Shefali; Fischer, Judith; Oji, Vinzenz; Zvulunov, Alex; Traupe, Heiko; Hennies, Hans Christian; Kelsell, David P.

In: American Journal of Human Genetics, Vol. 89, No. 4, 07.10.2011, p. 564-571.

Research output: Contribution to journalArticle

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T1 - Mutations in CSTA, Encoding Cystatin A, Underlie Exfoliative Ichthyosis and Reveal a Role for this Protease Inhibitor in Cell-Cell Adhesion

AU - Blaydon, Diana C

AU - Nitoiu, Daniela

AU - Eckl, Katja-Martina

AU - Cabral, Rita M

AU - Bland, Philip

AU - Hausser, Ingrid

AU - van Heel, David A

AU - Rajpopat, Shefali

AU - Fischer, Judith

AU - Oji, Vinzenz

AU - Zvulunov, Alex

AU - Traupe, Heiko

AU - Hennies, Hans Christian

AU - Kelsell, David P

N1 - Copyright © 2011 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.

PY - 2011/10/7

Y1 - 2011/10/7

N2 - 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.

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KW - Base Sequence

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KW - Homozygote

KW - Humans

KW - Ichthyosis

KW - Male

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KW - Molecular Sequence Data

KW - Mutation

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KW - Protease Inhibitors

KW - Sequence Homology, Amino Acid

KW - Stress, Mechanical

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