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Yıl:2016; Cilt: 53; Sayı: 3>> Özet
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Nöropsikiyatri Arşivi; 2016;53(3):267-271
Bipolar I Bozukluğu Olan Ötimik Ergenlerde Serumda Beyinden Köken Alan Nörotrofik Faktör Düzeyleri
NC Binici, FN İnal Emiroğlu, H Resmi, H Ellidokuz
Dr. Behçet Uz Çocuk Hastalıkları ve Cerrahisi Eğitim ve Araştırma Hastanesi, İzmir
Amaç: Son yıllarda bipolar bozukluk (BB) etyopatolojisi, duygudurumun oluşmasında etkili beyin yapılarındaki nöroplastisite bozukluğuyla ve hücre hayatta kalım süresinde azalmayla ilişkilendirilmektedir. Beyin kaynaklı nörotrofik faktör (BDNF), nöroplastisiteyi düzenleyen nörotrofik faktör ailesinin bir üyesidir. Bu araştırmada BB Tip I tanılı ergenlerde hastalıkla ve tedavi ile ilgili değişkenlerin serum BDNF düzeylerine etkisini araştırılması ve serum BDNF düzeylerini sağlıklı ergenle karşılaştırılması amaçlanmıştır. Yöntem: Çalışmaya 15-19 yaşlar arasında 25 BB Tip I tanısı alan ergen ile 17 gönüllü dahil edilmiştir. Çocuklar İçin Duygulanım Bozuklukları ve Şizofreni Görüşme Çizelgesi-Şimdi ve Yaşam Boyu Versiyonu (K-SADS P-L) ve Washington Üniversitesi Çocuk ve Gençler için Duygulanım Bozuklukları ve Şizofreni Ölçeği - Şimdiki Zaman ve Yaşam Boyu (WASH-U-K-SADS) duygulanım modülü ile tüm olguların tanıları kesinleştirilmiştir. Kan örnekleri ötimik dönemde alınmıştır. Ötimik dönemde olma ölçütü Young Mani Ölçeği (YMDÖ) ve Hamilton Depresyon Ölçeği (HDÖ) puanlarının 7’nin altında olması olarak kabul edilmiştir. Bulgular: Olgu ve kontrol grubu arasında serum BDNF düzeylerinin karşılaştırılması sonucunda her iki grup arasında anlamlı bir fark bulunamamıştır. Olgu grubunda lityum kullanan olguların serum BDNF düzeyleri, kullanmayanlara göre anlamlı olarak düşük bulunmuştur. Sonuç: Ergen olgularda ötimik dönemde BDNF düzeylerinin erişkin ötimik olgularda olduğu gibi normal saptanması, ergenlik ve genç erişkinlik dönemine özgü olabileceği gibi erişkin ve çocukluk çağı BB’un altta yatan nörobiyolojik temellerinin benzer olduğunu düşündürebilir. Çocukluk çağı BB’ta, hastalığın farklı dönemlerinde BDNF düzeylerini değerlendiren çalışmalar hastalığın altta yatan patofizyolojisinde BDNF ‘nin rolünü anlamaya yardımcı olacaktır.
Serum Brain-derived Neurotrophic Factor Levels among Euthymic Adolescents with Bipolar Disorder Type I
Introduction: Bipolar disorder (BD) has been increasingly associated with abnormalities in neuroplasticity and cellular resilience in brain regions that are involved in mood and that affect regulation. Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family that regulates neuroplasticity. The aims of the current study were to compare serum BDNF levels in euthymic adolescents with BD type I with those in controls and to investigate the relationship between clinical variables and serum BDNF levels in adolescents with BD type I. Methods: Twenty-five adolescents diagnosed with BD type I and 17 healthy control subjects within the age range of 15–19 years were recruited. Diagnoses were made by two experienced research clinicians using the Kiddie and Young Adult Schedule for Affective Disorders and Schizophrenia Present and Lifetime Version and the affective module of Washington University in St. Louis Kiddie and Young Adult Schedule for Affective Disorders and Schizophrenia-Present State and Lifetime. Blood samples were taken during euthymia, which was defined as Young Mania Rating Scale and Hamilton Depression Rating Scale scores below 7. Results: The comparison of BDNF serum levels between the case and healthy control groups revealed no significant differences. In the case group, BDNF levels were significantly lower in patients being currently treated with lithium. Conclusion: Similar to normal BDNF levels in adult patients with BD, the normal BDNF serum levels that we found in the euthymic state in adolescents and early adulthood may be related to the developmental brain stage in our study group. It may also show a common neurobiological basis of pediatric and adult BD. Further investigations evaluating BDNF levels in different mood states could help identify the role of BDNF in the underlying pathophysiology of BD.

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