İbrahim TUĞLU, Kemal VURAL, Eniz CEZAYİRLİ, TUNCAY VAROL, Kemal ÖZBİLGİN

Metabolik durumun global iskemi ve reperfüzyonda beyin hasarına etkisi

Amaç: Kısa süreli iskemik öntanıtımjn, global iskemik hasardan beyini koruyucu etki gösterdiğine inanılmaktadır. Ancak, metabolik etkinin hasardaki rolü bilinememektedir. Bu çalışmada, global iskemi sonrası nörolojik, metabolik ve histolojik parametrelerde görülen değişiklikler incelenmiştir. Gereç ve Yöntem : Üç aylık erişkin sıçanlarda iki taraflı karotis arter oklüzyonu ve hipovolemi oluşturma yöntemi (40) ile 5 dakikalık iskemik tanıtımı takiben 48 saat sonra 10 dakikalık iskemi oluşturuldu. Deney hayvanlarının davranışları nörolojik yönden incelendi; alınan beyinler 2,3,5-trifeniltetrazoliyum klorid (TTC) ile boy andı; kan gazı analizleri yapıldı; histolojik kesitler ışık mikroskobu ile incelendi. Bulgular: Ataksi ve koma benzeri nörolojik bulgular ile beyin koronal kesitlerinde TTC boyamasında iskeminin şiddetinden bağımsız, heterojen dağılmış, soluk beyaz görünen infarkt alanları saptandı. Mikroskobik kesitlerde; hücre nekrozu, ödem gibi ciddi patolojik bulgular saptandı. Sonuç : Çalışmamızda öntanıtım grubu ile global iskemi grubu arasında görülen benzerlik, standardize edilemeyen metabolik durum nedeni ile ön tanıtımın nöron hasarı üzerindeki koruyucu etkisinin tartışmalı olduğunu göstermektedir. Sonuç olarak, hücre düzeyinde oluşan iskeminin metabolik durumla ilgisini daha iyi daha iyi açıklayabilmek için yeni çalışmlara ihtiyaç vardır.

Anahtar Kelimeler:

Kısırlık, Reperfüzyon hasarı, Sıçan, Wistar, Serklaj, servikal, Uterin servikal yetmezlik

The effect of metabolic condition on the brain damage related to global ischemia and reperfusion

It is thought that ischemic preconditioning prevent the brain tissue from global ischemic damage. Hower the role of metabolic effect in the ischemic process has not yet clear. In this study, we produced global ischemia in the brain of the rats, than examined the neurological, metabolic and histological changes. In 3 months old rats, by the methods of bilateral carotid artery occlusion and hypovolemia, 48 hours after 5 minutes ischemic preconditioning following 10 min ischemia was produced. Neurological changes and arterial blood gas analysis were examined. Brain tissues of animals were stained with 2, 3, 5-triphenyletetrazolium chloride (TTC) and examined under light microscope. Rats showed ataxia and coma like symptoms. We observed the heterogeneously disseminated infarct areas, cell necrosis and edema which were independent from severity of ischemia. In our study we speculated that preventive effect of ischemic preconditioning in the damage of neuronal tissue is debate due to environmental factors. Similarity between preconditioning and ischemia groups and non-standardizations of metabolic conditions may effect these results. Future studies are required to explain metabolic effects on ischemic brain damage.

Keywords:

Infertility, Reperfusion Injury, Rats, Wistar, Cerclage, Cervical, Uterine Cervical Incompetence,

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