{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T18:41:06Z","timestamp":1775500866429,"version":"3.50.1"},"reference-count":16,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2010,4,26]],"date-time":"2010-04-26T00:00:00Z","timestamp":1272240000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J Dermatology"],"published-print":{"date-parts":[[2010,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:bold>Background\u2002<\/jats:bold><jats:italic>Xeroderma Pigmentosum<\/jats:italic>(XP) is a rare autosomal recessive disorder characterized by cutaneous and ocular alterations. Eight genes,<jats:italic>Xeroderma Pigmentosum<\/jats:italic>group A (<jats:italic>XPA)<\/jats:italic>to<jats:italic>Xeroderma Pigmentosum<\/jats:italic>group G (<jats:italic>XPG)<\/jats:italic>and<jats:italic>Xeroderma Pigmentosum<\/jats:italic>group V (<jats:italic>XPV)<\/jats:italic>, are known to be responsible for the disease and products of these genes are involved in the repair of deoxyribonucleic acid (DNA) lesions generated by UV radiation. Several XP patients suffer from neurological defects, found in the XPA (the most common form), D and G groups. The aim of this study was to investigate the mutational spectrum of<jats:italic>XPA<\/jats:italic>in Tunisia, in order to propose a simple tool for molecular diagnosis.<\/jats:p><jats:p><jats:bold>Methods\u2002<\/jats:bold>This study was carried out on six unrelated families with nine Tunisian XPA patients. Clinical features were recorded. As a previous study showed the presence of the R228X mutation in Tunisia, patients were first screened for this mutation by polymerase chain reaction\u2010restriction fragment length polymorphism and then confirmed by direct sequencing.<\/jats:p><jats:p><jats:bold>Results\u2002<\/jats:bold>The results showed that all patients carried the<jats:italic>XPA<\/jats:italic>R228X mutation. This mutation corresponds to a C to T transition, which creates a premature stop codon at position 228, thus causing a DNA repair defect.<\/jats:p><jats:p><jats:bold>Conclusions\u2002<\/jats:bold>The<jats:italic>XPA<\/jats:italic>R228X mutation is common in Tunisian population. This mutation is associated with a relatively moderate phenotype of the XPA. As all explored patients presented the recurrent mutation<jats:italic>XPA<\/jats:italic>R228X, a potential founder effect was searched and confirmed by haplotype analysis. Taking into account similar genetic background, investigation of this mutation should allow a cost effective and rapid diagnosis of XPA in north\u2010African populations.<\/jats:p>","DOI":"10.1111\/j.1365-4632.2010.04421.x","type":"journal-article","created":{"date-parts":[[2010,4,26]],"date-time":"2010-04-26T12:17:44Z","timestamp":1272284264000},"page":"544-548","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Genetic homogeneity of mutational spectrum of group\u2010A xeroderma pigmentosum in Tunisian patients"],"prefix":"10.1111","volume":"49","author":[{"given":"Olfa","family":"Messaoud","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mariem","family":"Ben 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