Do specific pockets of HLA-C molecules predispose Jewish patients to psoriasis vulgaris?
| Autor: | Rivka Ben Hammo, Eli Tzfoni, Shoshana Battat, Cilly Safirman, Katsushi Tokunaga, Chaim Brautbar, Akihiko Asahina, Adam Friedmann, Anat Roitberg-Tambur |
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| Rok vydání: | 1994 |
| Předmět: |
Male
Population Molecular Sequence Data Dermatology Human leukocyte antigen HLA-C Antigens HLA-C Antigen Psoriasis Aspartic acid Medicine Humans Genetic Predisposition to Disease Amino Acid Sequence Israel education Peptide sequence Alanine education.field_of_study Aspartic Acid business.industry Gene Amplification Chromosome Mapping DNA medicine.disease Case-Control Studies Jews Immunology Female business |
| Zdroj: | Journal of the American Academy of Dermatology. 31(6) |
| ISSN: | 0190-9622 |
| Popis: | Psoriasis vulgaris was reported to be associated with a specific alanine residue at position 73 of HLA-C alleles in Japanese patients.Our purpose was to determine the role of HLA genes in susceptibility to psoriasis vulgaris in the Israeli Jewish population.Twenty-eight Israeli patients were analyzed for their HLA class I and II specificities by means of serologic and molecular methods.All patients possessed in their HLA-C antigens an alanine residue at position 73 (p0.002). A significantly increased frequency of HLA-Cw6 and of Cw7 was also observed among the patients (p0.02).Our study clearly shows that alanine in position 73 is significantly associated with psoriasis vulgaris in Jewish patients. Cw6 and Cw7 have a unique antigen-binding pocket containing both alanine at position 73 and a negatively charged aspartic acid at position 9. These residues are most probably important in determining the conformation of the C pocket and in turn the nature of the peptide bound to it. We suggest that this combination confers the highest risk of the development of psoriasis vulgaris. |
| Databáze: | OpenAIRE |
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