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Yıl:2018; Cilt: 55; Sayı: 3>> Özet
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Nöropsikiyatri Arşivi; 2018;55(3):276-279
Tip 2 Diyabetik Hastalarda SOD2 Polimofizmi Anormal Kantitatif Duysal Test ile ilişkilidir
A Işıklı, AK Üzüm, İ Satman, Z Matur, AE Öge, Ci Küçükali, E Tüzün, S Erden, E Özkök
İstanbul Üniversitesi, İstanbul
Amaç: Diabetes mellitus (DM) diyabetik polinöropatiyi indükleyerek (DPN) periferik sinirleri etkilemektedir. Mitokondriyal fonksiyon bozukluğu ve oksidatif stres DPN’nin potansiyel sebeplerindendir. Yöntem: Sinir ileti çalışması, 11’i DPN’li olmak üzere 20 tip 2 DM hastası ve 15 sağlıklı kontrol üzerinde gerçekleştirildi. Soğuk, sıcak ve titreşim algılama eşik değerleri Sayısallaştırılmış Duysal Test ile ölçüldü. Süperoksid dismutaz 2 (SOD2) tek nükleotid polimorfizm (SNP) (rs5746136) varyantları, polimorfizm zincir reaksiyon (PCR) ve NexteraXT DNA Kütüphaneleme ile tayin edildi. Bulgular: DPN’si olan hastalarda anlamlı olarak artmış eşik değerine sahip oldukları bulundu. DPN’si olmayan DM hastalar ve sağlıklı kontrol gruplarını oluşturan kişilerin değerlendirmeye alınabilen sonuçlarının olduğu gösterildi. SOD2 TT varyantının DM ve DPN’li hastalarda daha yaygın olduğu bulundu. DM’li hastalardan TT varyantını taşıyanların artmış algı eşik değerine sahip oldukları bulundu. Sonuç: Sayısallaştırılmış duyu testinin, DPN çalışmalarında standart sinir ileti çalışmalarına göre üstünlüğü olmadığı bulundu. Yüksek duyu eşik değeri bulgusuna sahip olan SOD2 gen varyantını taşıyanların, oksidatif stres ve DPN arasındaki ilişkiyi daha ileri düzeyde doğrulamak adına önemli olduğu bulundu.
A SOD2 Polymorphism is Associated with Abnormal Quantitative Sensory Testing in Type 2 Diabetic Patients
Introduction: Diabetes mellitus (DM) affects peripheral nerves inducing diabetic polyneuropathy (DPN). Mitochondrial dysfunction and oxidative stress are potential causes of DPN. Methods: Nerve conduction studies were performed in 20 type 2 DM patients (11 with DPN) and 15 healthy controls. Perception threshold values of cold, warm and vibration were measured by quantitative sensory testing. Variants of a superoxide dismutase 2 (SOD2) gene single nucleotide polymorphism (SNP) (rs5746136) were determined by polymerase chain reaction (PCR) and following NexteraXT DNA Library. Results: DPN patients showed significantly increased threshold values. DM patients without DPN and healthy controls showed comparable values. TT variant of the SOD2 SNP was more prevalent in DM and DPN patients. DM patients with the TT variant displayed increased perception threshold values. Conclusions: Quantitative sensory testing is not superior to standard nerve conduction studies in DPN. Carriers of SOD2 SNP manifested increased sensory threshold levels which is important in further corroborating the link between oxidative stress and DPN.

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