Serdar ŞAHİNTÜR
(Bursa Uludağ Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Bursa, Türkiye)
Naciye İŞBİL
(Bursa Uludağ Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Bursa, Türkiye)
Yıl: 2021Cilt: 47Sayı: 3ISSN: 1300-414X / 2645-9027Sayfa Aralığı: 423 - 430Türkçe

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Bazal Vasküler Tonusun Düzenlenmesinde Rol Alan Mekanizmaların Sıçan Torasik Aort Modelinde İncelenmesi
Bu çalışmada, endotelyal nitrik oksit sentaz (eNOS)/nitrik oksit (NO), siklooksijenaz (COX), AMP ile aktive olan protein kinaz (AMPK), mitojen ile aktive edilen protein kinaz (MAPK) ve apelin reseptörü (APJ) sinyal ileti yolakları ile potasyum kanallarının vasküler tonus üzerindeki etkisinin belirlenmesi amaçlandı. Wistar Albino erkek sıçanların torasik aortlarından elde edilen 4 mm’lik damar halkaları izole organ banyosu sistemine yerleştirildi. Damar gerimi 1 gram olarak ayarlandı. Sinyal ileti yolaklarının ve potasyum kanallarının bazal damar tonusu üzerindeki etkilerini belirlemek için 1 saatlik dengelenme periyodunu takiben inhibitör madde uygulamaları yapıldı. İnhibitör madde uygulamalarından önceki ve sonraki periyodlardaki gerim değerleri kaydedildi. Nω-Nitro-L-arginin metil ester ve tetraetilamonyum uygulamaları bazal damar gerim değerlerinde istatistiksel olarak anlamlı düzeyde artışa neden oldu (sırasıyla: p < 0,001; p < 0,05). İndometazin ve dorsomorfin uygulamaları bazal damar gerim değerlerinde istatistiksel olarak anlamlı düzeyde azalmaya neden oldu (p < 0,05). F13A ve U0126 uygulamaları bazal damar gerim değerlerinde istatistiksel olarak anlamlı düzeyde bir değişikliğe neden olmadı. Bu çalışmanın verileri eNOS/NO, COX ve AMPK sinyal ileti yolakları ile potasyum kanallarının bazal vasküler tonus regülasyonunda önemli birer etken olduğunu göstermektedir. Buna karşın MAPK ve APJ sinyal ileti yolaklarının sıçan torasik aortundaki bazal vasküler tonus düzenlenmesinde önemli birer faktör olmadığı düşünülmektedir.
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