Gelişme dönemindeki Japon bıldırcınlarının pankreasındaki koyu ve açık sitoplazmalı Endokrin hücreler üzerine elektron mikroskobik araştırmalar
Bu çalışma, gelişme dönemindeki Japon bıldırcınlarının pankreasındaki alfa ve beta hücrelerinin elektron mikroskobik yapısının belirlenmesi amacıyla yapıldı. Alfa adacıkları çok sayıda alfa hücreleri ile az sayıda D ve birkaç adet pankreatik polipeptid (PP) hücrelerinden oluşurken, beta adacıkları çok sayıda beta hücreleri ile birkaç adet D ve nadiren de alfa hücrelerinden oluşmaktaydı. Ayrıca, endokrin adacıklardaki alfa ve beta hücrelerinin salgı granülü ve çekirdeklerinin görünüşüne, sitoplazmasındaki serbest ribozom ve polizomların miktarına göre koyu ve açık sitoplazmalı farklı 2 tipinin olduğu belirlendi. Koyu sitoplazmalı hücrelerin açık sitoplazmalı hücrelere göre; çok fazla serbest ribozom, polizom, endoplazmik retikulum ve olgunlaşmamış granüller içermekteydi. Bu çalışmamızın sonucunda, genç Japon bıldırcınlarının endokrin pankreasında alfa ve beta hücrelerinin olgunlaşmamış granül görünümleriyle karakterize farklı tiplerinin bulunduğu belirlenmiş oldu. Endokrin adacıklarda belirlenen bu koyu sitoplazmalı endokrin hücrelerin ya dinlenme dönemindeki hücreler ya da henüz olgunlaşmamış hücreler olabileceği düşünüldü.
Electron microscopic studies on the Dark and light Endocrine cells in pancreas of young Japanese quails
The aim of this study was to examine the electron microscobic structure of the young Japanese quail pancreas. Although alpha islets were comprised of abundant alpha, moderate D and a few PP cells, beta islets were comprised of numerous beta, a few D, and rare alpha cells. Furthermore, dark and light alpha and beta cell types were identified according to the amount of ribosomes and polysomes, and to the aspect of the nuclei and secret granules in endocrine islets. Dark endocrine cells were contained more free ribosomes, polisomes, rough endoplasmic reticulum (ER) and immature granules compared to light endocrine cells. According to the results of this study, we have previously identified a novel population of alpha and beta cells characterized by immature morphology in young Japanese quail pancreas. Dark endocrine cells identified in endocrine islets, which may be either quiescent cells or immature cells.
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- ISSN: 1306-6137
- Yayın Aralığı: Yılda 3 Sayı
- Yayıncı: Atatürk Üniversitesi Veteriner Fakültesi