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Yıl:2019; Cilt: 20; Sayı: 6>> Özet
TAM METİN
Anadolu Psikiyatri Dergisi; 2019;20(6):581-588
Beyin kökenli nörotrofik faktör, nörotrofin-3 ve nörotrofin-4 gen ekspresyon değişimleri majör depresyonun patogenezinde etkili midir?
DY Balım, Öİ Ay, ME Ay, Ü Karakaş, Aİ Kenar, ME Erdal
Mersin Üniversitesi, Mersin
Amaç: Beyin kökenli nörotrofik faktör (BDNF), nörotrofin-3 (NT-3) ve nörotrofin-4 (NT-4); nöronal sağlıklı kalımın, farklılaşmanın, büyümenin ve nöronal plastisitenin düzenlenmesinde önemli rolleri olan nörotrofinlerdir. Nöropsiki-yatrik hastalıkların patofizyolojisi ile nörotrofik faktörlerin ifade düzeyleri arasındaki ilişki bilinmekle birlikte, majör depresyon (MD) patogenezi ve nörotrofinler arasındaki ilişki henüz tam olarak aydınlatılamamıştır. Bu çalışmada, kan hücrelerindeki BDNF, NT-3, NT-4 gen ekspresyonları ile MD arasındaki ilişkiyi araştırdık. Yöntem: Bu olgu-kontrol çalışmasında, DSM-5 ölçütlerine göre MD’li 51 hasta ve 75 sağlıklı kontrole ait kanlardan total RNA elde edildi. Kantitatif Real-Time PCR yöntemi ile saptanan, MD ve kontrol gruplarındaki BDNF, NT-3, NT-4 genlerine ait ekspresyon düzeyleri karşılaştırıldı. Bulgular: Çalışma sonucunda, MD hastalarının BDNF gen ekspresyon düzey-lerinin, kontrol grubuna göre anlamlı derecede yüksek olduğu; NT-3 ve NT-4 değerleri bakımından ise gruplar ara-sında istatistiksel olarak anlamlı bir farklılık olmadığı belirlendi. Aile öyküsü olan MD hastalarının BDNF, NT-3 ve NT-4 ekspresyon düzeylerinde farklılık saptanmadı. Hasta grubu içinde cinsiyetler arasında ve antidepresan kulla-nım sürelerine göre, BDNF, NT-3 ve NT-4 ekspresyon düzeyleri bakımından istatistiksel olarak anlamlı bir farklılık bulunmadı. Tartışma: MD hastalarının kan hücrelerindeki BDNF geni ekspresyon düzeyi değişiklikleri, sadece MD'nin patogenezini anlamada değil, tedavinin izlenmesinde de, BDNF'nin perifer ile beyin arasındaki çift yönlü hareketi ve serum BDNF düzeyini değiştirme etkisinden dolayı göz önünde bulundurulmalıdır.
Are brain derived neurotrophic factor, neurotrophin-3 and neurotrophin-4 gene expression changes effective in the pathogenesis of major depression?
Objective: Brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3) and neurotrophin-4 (NT-4) are neuro-trophins and they are critical regulators of the survival, differentiation, growth and plasticity of neuronal networks. There is plenty of evidence suggesting the involvement of altered levels of expression of neurotrophic factors in the pathophysiology of neuropsychiatric disorders. However, the relationship between neurotrophins and majör depression (MD) remains unclear. In this study, we assessed the relationship between the BDNF, NT-3, NT-4 gene expression levels in blood cells and MD. Methods: In a case-control study, total RNA was obtained from blood cells, 51 MD patients (diagnosed according to the DSM-5 criteria) and 75 healthy controls. Detected with quantitative Real Time PCR, expression levels of BDNF, NT-3, NT-4 genes were compared between the groups. Results: In this study, BDNF expression levels of the patients with MD were significantly higher than the control group but no statistically significant difference between NT-3 and NT-4 expression levels. There was no differences in expression levels of BDNF, NT-3 and NT-4 genes in MD patients with family history. There was no statistically significant difference in the BDNF, NTF-3 and NTF-4 expression levels among the sex groups for the patient group and no statistically significant difference between MD patients according to antidepressant usage time. Discussion: Not only in understanding the pathogenesis of MD but also in the follow-up of treatment, expression level changes of BDNF gene in blood cells of MD patients must be considered because of the bidirectional movement of BDNF between the periphery and the brain and effect of changing serum BDNF levels.

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