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Yıl:2009; Cilt: 12; Sayı: 4>> Özet
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Klinik Psikiyatri Dergisi; 2009;12(4):188-196
Agmatin ve Beyin Poliamin Sistemi: Şizofreni Tanı ve Tedavisinde Yeni Bir Hedef Olabilir mi?
T Uzbay
GATA, Ankara
Şizofreni ve benzeri psikozlar sinir bilimleri alanındaki en önemli psikiyatrik hastalıklardır. Özellikle şizofreni beynin algı, bilişsel işlevler, düşünce ve duygulanım gibi hemen hemen tüm fonksiyonlarını etkileyen ve birçok dış faktörden etkilenen kompleks bir beyin hastalığıdır. Son yıllardaki belirgin gelişmelere rağmen şizofreni farmakoterapisi hala istenen düzeyde değildir. Şizofreni etiyopatagenezinin netleştirilmesi ve daha etkili yeni ilaçların geliştirilmesi halen psikofarmakolojinin en çok yatırım yapılan alanıdır. Katyonik bir poliamin olan agmatin doğada ve memelilerde yaygın olarak bulunur. Agmatinin beyinde yeni bir nörotransmitterdir. Beyinde sentezlenir, veziküllerde depolanır ve sinaptik aralığa salıverilerek imidazolin ve adrenerjik α2'ler gibi reseptörlerle etkileşir. Son zamanlarda, agmatinin şizofreni ve benzeri psikozların etiyopatojenezinde rolü olduğuna işaret eden bazı makaleler yayınlanmıştır. NMDA antagonizması gibi agmatin ile şizofreni arasında bir ilişki olabileceğini düşündüren başka veriler de mevcuttur. Şizofreni hastalarında spermin ve spermidin gibi başka poliaminlerin yüksekliğine işaret eden önceki çalışmaların sonuçları da bu görüşü desteklemektedir. Bu gözden geçirme yazısında agmatin ve benzeri poliaminlerin şizofreni ve benzeri psikiyatrik hastalıkların tanı ve tedavisindeki olası rolü irdelenmiştir.
A New Target for Treatment of Schizophrenia: Agmatine and Brain Polyamine System
Schizophrenia and schizophrenia-like psychosis are the
most important psychiatric disorders in the neuroscience.
Particularly, schizophrenia affects almost all
functions of brain such as perception, cognitive functions,
thought and emotion. It is a complex brain disorder
that is influenced by several external factors. Despite
some significant developments, pharmacotherapy of
schizophrenia is still inefficient. Clarifying etiopathogenesis
of schizophrenia and developing new drugs are
already the most enterprising area of psychopharmacology.
Agmatine, a cationic polyamine, is widely existed in
nature and mammals. Agmatine is a new neurotransmitter
in brain. It is synthesized in brain, stored in synaptic
vesicles and released from the vesicles to synaptic cleft.
Then, it binds to receptors such as imidazoline and
adrenergic α2. Recently, some articles indicating that
agmatine has a role in etiopathogenesis of schizophrenia
have been published. There is also additional information
such as NMDA antagonism by agmatine implies that
there may be a relationship between agmatine and
schizophrenia. Results from previous reports indicating
elevated levels of other polyamines like spermidine and
spermine in patients with schizophrenia support this
idea. In this review, possible role of agmatine and other
polyamines in diagnosis and treatment of schizophrenia
and schizophrenia-like psychiatric disorders has been
considered.

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