Dergi Ara >>
Yıl:2005; Cilt: 13; Sayı: Ek 2>> Özet
Psikiyatri Psikoloji Psikofarmakoloji (3P) Dergisi; 2005;13(Ek 2):17-20
Depresyon ve Noradrenerjik Sistem
C Cerit, E Önder
Kocaeli Ü. Tıp Fak. Psikiyatri ABD
Noradrenerjik sistem, uyanıklık, dikkat, öğrenme, bellek, duygudurum üzerinde etkilidir. MSS' de bulunan en önemli noradreneıjik nöronlar dorsal ponstakİ Lokus Cerolous' ta yer almaktadır. En önemli noradrenerjik yolak, LC tan frontal-prefrontal kortekse uzanan projeksiyondur. Beynin bu bölgesindeki NA artışı, NA geri alım inhîbisyonunda ortaya çıkan antidepresif etkiyi yaratmaktadır. Depresyonda noradreneıjik sistemdeki olası işlev bozukluğu ile ilgili çalışmalar; NA metaboliti olan 3-metoksi 4-hidrosifenil glikol düzeylerinin ölçülmesini, kan hücrelerinde reseptör yoğunluğunun belir­lenmesini, olası postmortem noradreneıjik sistem değişikliklerini, NA'nin sentezi ve metabolizması ile ilgili genetik belirleyiciler ile büyüme hormonu ve kortizol salgılanmasını kontrol eden hipotalamik adrenoreseptör aktivitesinî değer­lendiren uyarılma testlerinin etkilerinin değerlendirilmesini kapsamaktadır. Birçok antidepresan ilaç seçici ya da seçici olmayan bir şekilde NA geri emilimini inhibe eder. Desipramin, nortriptilin, maprotilin, viloksazin gibi ilaçlar NA geri alınımım göreceli olarak seçici bir inhibisyona uğratmaktadırlar. Reboksetin en seçici NA geri ahm inhibitörü olarak etkinlik gösterir.
Depression and Noradrenergic system
Noradrenergic system effects on vigilance, attention, learning, memory and mood. The most important noradrenergic nöron group in CSS is located in Locus Cerolous area at dorsal pons. Also the most important noradrenergic pathway reaches from LC to frontal-prefrontal cortex. The NA increase in this area is the cause of the antidepressant effect that occurs in NA reuptake inhibition. The investigations about noradrenergic system dysfunction in depression are in such areas: The measurements of NA methabolite, 3-methoxi 4-hydroxyphe.nilglychol levels, to determinate the intensity of NA receptors on blood cells, postmortem noradrenergic system changes, the genetic characteristics of NA synthesis and methabolism, the hypothalamic adrenoreceptor stimulating tests that controls the growth hormone and Cortisol oscilla­tion. Many antidepressant drugs inhibit the NA reuptake selectively or not. Desipramine, nortriptiline, maprotiline and viloxasine are inhibit NA reuptake relatively in a selective way. Reboxetine acts as the most selective NA reuptake inhibitor.

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