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Yıl:2018; Cilt: 5; Sayı: 3>> Özet
TAM METİN
The Journal of Neurobehavioral Sciences; 2018;5(3):165-171
Antipsikotik tedavi öyküsü olmayan şizofreni tanılı hastalarda serumdaki beyin kaynaklı nörotrofik faktör(bdnf) düzeylerinin araştırılması
OB Eğilmez, MH Orum, E Beyazyüz, MÇ Aydemir
Adıyaman Üniversitesi Adıyaman
Beyin kaynaklı nörotrofik faktör (BDNF) santral sinir sisteminde en geniş dağılımı gösteren nörotrofik faktördür. Santral sinir sistemindeki nöronların gelişimine, rejenerasyonuna ve korunmasına yardımcı olur. Nörotransmitterlerin sentezini, metabolizmasını ve nöronal aktivitesini düzenler; ayrıca dopaminle ilişkili sistemlerin ve mezolimbik dopamin sisteminin gelişimiyle ilişkilidir. Bu çalışmada daha önce tedavi almamış şizofreni hastaları ile sağlam kontrol grubunun serum BDNF düzeyleri arasındaki olası farklılıkların araştırılması amaçlanmıştır. SCID-I ve DSM-IV-TR kriterlerine göre şizofreni tanısı alan daha önce antipsikotik tedavi almamış 35 şizofreni tanılı hasta ile yaş ve cinsiyet olarak eşleştirilmiş 35 kişiden oluşan sağlıklı kontrol grubunun serum BDNF düzeyleri karşılaştırıldı. Şizofreni semptomatolojisi, pozitif ve negatif sendrom ölçeği (PANSS) ile değerlendirildi. Sonuçlar, BDNF düzeylerinin şizofreni hastalarında sağlıklı kontrol deneklerine göre anlamlı olarak daha düşük olduğunu gösterdi (p = 0.000). Dezorganize ve paranoid (p = 0.000), dezorganize ve farklılaşmamış şizofreni (p = 0.000) alt tipleri arasında BDNF düzeylerinde anlamlı bir farklılık vardı. Farklılaşmamış ve paranoid şizofreni alt tipleri arasında BDNF düzeylerinde anlamlı fark yoktu (p = 0.081). PANSS skorları ile alt ölçek puanları ve serum BDNF düzeyleri arasındaki ilişki anlamlı bulunmadı (p> 0.05). Fonksiyonel skorların genel değerlendirmesi ile serum BDNF düzeyleri arasındaki ilişki incelendi ve aralarında pozitif korelasyon bulundu (p = 0.07, r = 0.445). Bulgularımız antipsikotik tedavi almamış şizofreni hastalarının düşük BDNF seviyelerine sahip olduklarını göstermiştir. Antipsikotik ilaç öyküsü olmayan şizofreni hastalarında saptanan düşük BDNF serum düzeyleri, bu nörotrofik faktörle ilgili bir sorunun, şizofreninin başlangıç evresinde yatan beynin yapısal ve fonksiyonel değişikliklerle ilişkisi olabileceği hipotezi ile tutarlıdır
Investigation of serum brain-derived neurotrophic factor (BDNF) levels in patients diagnosed with schizophrenia wıthout antıpsychotıc treatmenthıstory
BDNF is a member of the neurotrophic family that promotes the development, regeneration, sustaining and maintenance of neuron function in the central nervous system. BDNF modulates neurotransmitter synthesis, metabolism and neuronal activity and is also involved in the development of dopaminergic-related systems, and the mesolimbic dopamine systems. In this study we aimed to investigate the possible differences of serum brain-derived neurotrophic factor (BDNF) levels between the drug-naive patients with schizophrenia and healthy controls. Serum BDNF levels were determined in the serum of 35 drug-naive patients diagnosed as schizophrenia according to SCID-I and DSM-IV-TR criteria and 35 healthy controls subjects matched for gender and age. The schizophrenia symptomatology was assessed by the positive and negative syndrome scale (PANSS). The results showed that BDNF levels were significantly lower in drug-naive patients with schizophrenia than in healthy control subjects (p=0.000). There was a significant difference in BDNF levels between disorganized and paranoid (p = 0.000), disorganized and undifferentiated schizophrenia (p = 0.000) subtypes. There was no significant difference in BDNF levels between the undifferentiated and paranoid schizophrenia subtypes (p = 0.081). The relationship between PANSS scores and subscale scores and serum BDNF levels was not found to be significant (p>0.05). The relationship between general assessment of functionality scores and serum BDNF levels was examined and there was a positive correlation between them (p = 0.07, r = 0.445). Our findings showed decreased BDNF serum levels in a sample of drug-naive patients with schizophrenia. Lower serum levels of BDNF in a sample of drug-naive patients with schizophrenia are consistent with the hypothesis that a deficit in this neurotrophic factor may contribute to the structural and functional alterations of brain underlying in the initial phase of schizophrenia suggesting that neurodevelopmental disturbances may be involved in the pathogenesis of schizophrenia.

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