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Yıl:2020; Cilt: 31; Sayı: 3>> Özet
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Türk Psikiyatri Dergisi; 2020;31(3):201-211
Otizm Spektrum Bozukluklarında Melatonin ve Sirkadiyen Ritim
AS Yenen, HT Çak
Hacettepe Üniversitesi, Ankara
Amaç: Otizm spektrum bozukluğu (OSB), erken çocukluk döneminde başlayan sosyal-duygusal alanlarda yetersizlik, kısıtlı, tekrarlayıcı ilgi alanları ve davranışlarla karakterize nörogelişimsel bir bozukluktur. Otizm spektrum bozukluğu fizyopatolojisi tam olarak aydınlatılamamış olmakla birlikte, son zamanlarda sirkadiyen ritim ve melatonin fizyolojisindeki farklılıkların OSB etyopatogenezine katkısı merak edilen ve araştırılan bir konu olarak karşımıza çıkmaktadır. Bu gözden geçirme yazısında melatonin, sirkadiyen ritim ve OSB arasındaki ilişkinin ele alınması amaçlanmıştır. Yöntem: PubMed veri tabanında 1990-2019 yılları arasında yayınlanan makaleler gözden geçirilmiş, konuyla ilgili alan yazınında öne çıkan araştırmalar değerlendirme kapsamına alınmıştır. Bulgular: Otizm spektrum bozukluğunda melatonin düzeyinde azalma sık görülen bir bulgu olmakla birlikte OSB’ye sık eşlik ettiği bilinen uyku bozukluklarının tedavisinde melatoninin yüz güldürücü sonuçlar verdiği pek çok çalışmayla gösterilmiştir. Benzer şekilde sirkadiyen ritim bozuklukları da OSB’de sıklıkla bildirilmekte ve sirkadiyen ritim bozukluklarının nörogelişimin erken dönemlerinde sinaptik plastisiteye etkisi üzerinden hastalığa duyarlılığı arttırabileceği düşünülmekte, sirkadiyen saat gen mutasyonlarının OSB’de sık görüldüğü bildirilmektedir. Sonuç: Melatonin ve sirkadiyen ritim ile OSB ilişkisini anlamak için daha çok çalışma gereklidir. Elde edilecek veriler melatoninin sadece OSB etiyolojisindeki rolüne ışık tutmakla kalmayacak, aynı zamanda OSB’de erken müdahale seçenekleri için de yol gösterici olacaktır.
Melatonin and Circadian Rhythm in Autism Spectrum Disorders
Objective: Autism spectrum disorders (ASD) are neurodevelopmental disorders of early childhood which are characterized by limited social-emotional reciprocity and restricted, repetitive patterns of interest and behaviors. The pathophysiology of ASD has not been fully elucidated. Dysregulation of circadian rhythm and melatonin might play a role in ASD pathogenesis. This article aims to review the relationship between melatonin, circadian rhythm and ASD in detail. Method: Articles published in the PubMed database between 1990- 2019 were reviewed and prominent studies in the scope of the review were included. Results: Decreased melatonin levels were detected frequently in ASD and melatonin replacement treatment for sleep disorders accompanying ASD has given satisfactory results. Similarly, circadian rhythm disorders were frequently reported in ASD, which might increase the susceptibility to ASD through their effects on synaptic plasticity in the early neurodevelopment. Mutations in the clock-controlled genes were also common in ASD. Conclusion: Further are required for understanding the relationship between melatonin, circadian rhythm and ASD, which will not only shed light on the role of melatonin in the etiology of ASD, but may also guide to early intervention options.

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