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Yıl:2014; Cilt: 51; Sayı: 1>> Özet
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Nöropsikiyatri Arşivi; 2014;51(1):69-73
Multipl Skleroza Genetik Yatkınlık: FOXP3 Gen Polimorfizminin Rolü
N Işık, NY Manukyan, İA Cantürk, F Candan, AÜ Çakmak, GS Direskeneli
Medeniyet Üniversitesi, İstanbul
Giriş: Multipl Skleroz (MS) patogenezinde genetik ve çevresel faktörlerin önemi iyi bilinmektedir. Hastalığın immün patolojisi, patojen CD4+T lenfositlerine odaklanmıştır. Bu hücrelerin aktivitesi, CD4+CD25+ T regülatör hücreler tarfından kontrol edilmektedir. FOXP3 (forkhead boxP3) transkripsiyon faktörünün ise regülatör hücrelerin gelişimi ve fonksiyonu üzerinde kilit rolü vardır. Çeşitli otoimmün hastalıklarda, FOXP3 gen ekspresyonunda fonksiyonel değişiklikler saptanmıştır. Yöntem: Yaş ve cinsiyet açısından uyumlu 102 sağlıklı kontrol ve 148 Multipl Skleroz (118 Relapsing Remitting MS ve 30 Sekonder Progressif MS) hastasında, FOXP3 genine ait ekzon +2710 C/T (rs2232369) tek nükleotid polimorfizmi tarandı. Saptanan polimorfik alelin, hastalığa yatkınlık ve hastalık tipi ile bağlantısı araştırıldı. Bulgular: Hasta grubunda tek nükleotid polimorfizmi saptanmadı ancak kontrol grubunda %3 oranında polimorfik alel mevcuttu. Bu bulgularla, FOXP3 gen polimorfizmi ile hastalığa yatkınlık arasında bir bağlantı saptanmadı. Sonuç: Bu polimorfizm daha önce başka bir Multipl Skleroz hasta grubunda taranmamıştır. Sonuç olarak, hastalıkla polimorfik alel arasında bir bağlantı saptanamasa da, hastalığın patogenezinde son derece önemli bir yapı olan FOXP3 ile ilgili bundan sonraki genetik çalışmalarda, bu kodlanan bölgenin iyi bir aday olmadığı söylenebilir.
Genetic Susceptibility to Multiple Sclerosis: The Role of FOXP3 Gene Polymorphism
Introduction: It is well recognized that both genetic and environmental factors play an important role in the pathogenesis of multiple sclerosis (MS). Immune pathogenesis of MS focuses on pathogenic CD4+ T lymphocytes. CD4+CD25+ regulatory T cells have suppressive function in this cell group. FOXP3 (forkhead boxP3) transcription factor is a key structure in the development and function of regulatory cells. Functional alterations in FOXP3 gene expression have been observed in various autoimmune diseases. Methods: We screened a non-synonymous coding single nucleotide polymorphism (exon +2710 C/T) (rs2232369) of human FOXP3 gene in 148 MS patients (118 with Relapsing Remitting MS, 30 with Secondary Progressive MS) and 102 age- and sex-matched healthy controls. The association of polymorphisms with susceptibility, and course of the disease was evaluated. Results: We could not detect any single nucleotide polymorphism in MS patients, however, polymorphic allele was detected in 3% of the control group. Consequently, a genetic association between the FOXP3 gene polymorphism and MS was not revealed. Conclusion: The distribution of this polymorphism has not been screened in any other MS populations before. Although we could not succeed to find any association between susceptibility to MS and screened FOXP3 gene polymorphisms, we suggest that this particular polymorphism is not appropriate for these kind of studies in the future.

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