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Yıl:2003; Cilt: 13; Sayı: 4>> Özet
TAM METİN
Klinik Psikofarmakoloji Bülteni; 2003;13(4):197-203
Sinaps dışı ileti
Ö Akyol, S Ünal
İnönü Üniversitesi Tıp Fakültesi Malatya
Bilgi beyinde sinaptik ve sinaps dışı ileti (SDİ) aracılığı ile aktarılır. SDİ, sinaps dışı varikositlerden salınan hücre dı.ı sıvının yayılması, yüksek afiniteli reseptörler ve ta.ıyıcılar aracılığı ile gerçekleşir. Bu yüksek afiniteli alım sistemleri noradrenalin, dopamin, serotonin, asetilkolin, nitrik oksit (NO) gibi birçok nörotransmitteri, trisiklik antidepresanlar, psikostimulanlar, serotonin geri alım blokerler ve antikonvulzanlar gibi ilaçları hedef alır. SDİ aynı zamanda NO, karbon monoksit gibi maddelerin hücre dı.ı sıvı ve hücre membranlarına yayılmasını da içerir. NO’un ta.ıyıcı sistemlerin işlevlerini etkileyebildiği de gösterilmiştir. Bu yazıda SDİ’nin beyin aktivitesinde ve ilaç etkisindeki olası rolleri gözden geçirilmektedir
Nonsynaptic neurotransmission
Information in the brain is transmits by both synaptic and nonsynaptic neurotransmission (NSN). NSN includes the diffusion through the extracellular fluid of neurotransmitters released from nonsynaptic varicosities and high-affinity transmitter receptors and transporters. This high-affinity uptake system is the target of many neurotransmitters such as noradrenaline, dopamine, serotonin, acetylcholine and nitric oxide (NO) and also many drugs such as tricyclic antidepressants, psychostimulants serotonin reuptake blockers, and anticonvulsants. NSN also includes the diffusion of substances such as NO and carbon monoxide (CO) through both extracellular fluid and cellular membranes. It has been shown that NO can influence the function of uptake carrier systems. In this paper, the possible roles of NSN in the brain activity and drug actions are reviewed

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