Dergi Ara >>
Yıl:2007; Cilt: 1; Sayı: 1>> Özet
TAM METİN
Psikiyatride Derlemeler, Olgular ve Varsayımlar (RCHP); 2007;1(1):29-40
Nitrik Oksit: Alkol Kötüye Kullanımı ve Bağımlılığında Olası Yeni Bir Hedef
T Uzbay
Gülhane Askeri Tıp Akademisi, Tıbbı Farmakoloji ABD, Ankara
Serbest radikal bir gaz olan nitrik oksit (NO) çok çeşitli fizyolojik süreçlerde.görev alır. Öncülü olan L-arginının NO sentaz (NOS) enzımıyle NO ve sitrulline dönüştürülmesi sonucu oluşur. Bu sentez yolağı merkezi sınır sisteminde (MSS) gerçekleşir ve bir nörotransmitter kriterlerinin çoğunu karşılayan NO'nun MSS'de haberci (messenger) bir molekül olduğu düşünülmektedir. Yakın zamanda yürütülen çalışmalar NO'nun alkol bağımlılığında önemli bir görev üstlenebileceğini göstermektedir. Bu incelemenin amacı NO'nun alkol bağımlılığında rolünü belirlemektir. NOS inhibıtörlerı alkol çekilmesini düzenleyerek çekilmenin birçok bulgusunu hafifletir. Bu veriler NO'nun çekilme bulgularının açığa çıkmasında rol oynadığını düşündürür ve bu bulguların birçoğunun gelişmesinde NO'nun aracılık etmesi olasılığını açık bırakır. Bugüne dek elde edilen öncül veriler glutamat nörotransmısyonunun NOS ınhıbıtörlennın çekilme bulguları üzerindeki yararlı etkileriyle ilişkili olabileceğim göstermektedir. Bu veriler ayrıca. NO'nun alkol bağımlılığı potansiyelinde genel bir görev üstlendiğini göstermektedir. Bu nedenle NO sistemlerinin modülasyonu alkol kötüye kullanımı ve bağımlılığında potansiyel bir tedavi hedefi olabilir.
Nitric Oxide: A Possible New Target for Alcohol Abuse and Dependence
The free-radical gas nitric oxide (NO) plays an important role in a diverse range of physiological processes. It is synthesised from the precursor L-arginine by the enzyme NO synthase (NOS), which transforms L-arginme into NO and citrulline. This synthetic pathway exists in the central nervous system (CNS), and NO appears to be a messenger molecule in the CNS, fulfilling most' of the criteria of a neurotransmitter. Recent studies indicate that NO may play an important role in alcohol dependence. The purpose of this review is to address the role of NO in alcohol dependence. Inhibitors of NOS modulate withdrawal from alcohol, diminishing many signs of withdrawal. These data suggest that NO may be involved in the expression of withdrawal signs, and they leave open the possibility that NO may mediate the development of many of these signs. Although preliminary, data to date suggest that glutamate neurotransmission may be related to these beneficial effects of NOS inhibitors on signs of withdrawal. Emerging data further suggest that NO may have a general role in the dependence potential of alcoholism. Thus, modulation of NO systems may be a potential therapeutic target for treatment of alcohol abuse and- dependence..

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