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Yıl:2012; Cilt: 49; Sayı: 2>> Özet
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Nöropsikiyatri Arşivi; 2012;49(2):96-101
Dikkat Eksikliği ve Hiperaktivite Bozukluğu (DEHB) Tanısı Olan Çocuklarda Serum Beyinden Köken Alan Nörotrofik Faktör (BDNF) Seviyelerinin Değerlendirilmesi: Öncül Bulgular
E Sargın, AP Akay, H Resmi, SA Cengizhan, H Özek, H Ellidokuz, S Miral, E Orçin
Dokuz Eylül Üniv. Tıp Fak., İzmir
Amaç: Beyinden köken alan nörotrofik faktör (BDNF) nöronların gelişim ve sağ kalımını destekler ve dopaminerjik nöronları da içeren pek çok nöronda sinaptik plastisite mekanizmalarında çok önemli rol oynar. BDNF'nin nöronal gelişimde önemli bir role sahip olması nedeniyle çocukluk başlangıçlı nörogelişimsel bir hastalık olan DEHB'nin de patogenezinde rolü olabileceği hipotezi öne sürülmüştür. Bu çalışmada, DEHB tanısı alan hastalarda serum BDNF düzeylerinin sağlıklı kontrollerle karşılaştırılması amaçlanmıştır. Yöntem: Bu çalışmaya 6-12 yaş arasında 30 DEHB'li ve 31 sağlıklı kontrol çocuk alınmıştır. Çalışmaya katılan tüm çocuklarda psikiyatrik tanıları belirlemek için DSM IV'e göre uyarlanmış Okul Çağı Çocukları İçin Duygulanım Bozuklukları ve Şizofreni Görüşme Çizelgesi - Şimdi ve Yaşam Boyu Versiyonu (Kiddie Schedule for Affective Disorders and Schizophrenia for Shool Aged Children- Present and Lifetime Version) K-SADS-PL uygulanmıştır ve serum BDNF düzeyleri ölçülmüştür. Ayrıca, çocukların anne ve babalarından, 4-18 yaş Çocuk ve Gençler için Davranış Değerlendirme Ölçeğini (CBCL) doldurmaları istenmiştir. Bulgular: Bu çalışmada DEHB tanısı alan olgularda serum BDNF düzeylerinin araştırılmış ancak DEHB'li olgular ile sağlıklı kontroller arasında istatistiksel olarak anlamlı bir fark saptanamamıştır (p=0,885). DEHB olgularında, serum BDNF düzeyleri DEHB alt tipleri açısından karşılaştırıldığında istatiksel olarak anlamlı bir fark bulunmamıştır (p<0,093). Ancak istatistiksel olarak anlamlı farklılık olmasa da DE baskın tip DEHB olgularında bileşik tip DEHB olgularına göre serum BDNF düzeyleri düşük bulunmuştur. Sonuç: Bu çalışma BDNF'nin DEHB etyolojisinde rol oynadığı hipotezini desteklememektedir. Ancak, BDNF düzeylerini anlamlı bir şekilde yorumlayabilmek için, düzeyleri etkileyen faktörleri ve aynı zamanda periferik kan BDNF'si nin kaynaklarının aydınlatılması gerekmektedir.
Evaluation of Serum Brain-Derived Neurotrophic Factor Levels in Children with Attention Deficit Hyperactivity Disorder: Preliminary Data
Objective: Brain-derived neurotrophic factor (BDNF) has an important role in the survival, differentiation and synaptic plasticity of a series of neuronal systems including dopaminergic neurons. For this reason, it is proposed that BDNF plays a role in the attention deficit hyperactivity disorder (ADHD) pathophysiology. In this study, serum BDNF levels in children diagnosed with ADHD were compared with those in healthy subjects. Methods: 30 children diagnosed with ADHD and 31 healthy control subjects aged 6-12 [year]s were recruited to the study. The psychiatric diagnoses were determined by applying a semi-structured interview using the Kiddies Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version (K-SADS-PL) and serum BDNF levels of the subjects were measured. Both parents were asked to fill out the Child Behavior Checklist (CBCL) for children 4-18 [year]s of age. Results: When ADHD cases and the controls were compared, no statistically significant difference was found in mean levels of serum BDNF (p=0.885). In ADHD cases, no statistically significant correlation was found between serum BDNF levels and ADHD subtypes (p=0.093). However, although there was no statistically significant difference, serum BDNF levels were found to be low in children diagnosed with attention deficit predominant type ADHD compared to children diagnosed with combined type ADHD. Conclusion: This study does not support the hypothesis that BDNF plays a role in the etiology of ADHD. However, to interpret accurately the levels of BDNF, the factors that affect the levels, the reliable measurement source of the peripheral blood BDNF and its method must be enlightened.

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