Atresia and Apoptosis in Preovulatory Follicles in the Ovary of Danio rerio (Zebrafish)

Sema İşisağ ÜÇÜNCÜ; Özlem ÇAKICI

Makale detayları

Atresia and Apoptosis in Preovulatory Follicles in the Ovary of Danio rerio (Zebrafish)

Yazarlar:

Sema İşisağ ÜÇÜNCÜ | Özlem ÇAKICI

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2009 Vol.9 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

3/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000838510

Sıklık:

Üç Aylık

pISSN:

1303-2712

Anahtar kelimeler:

Özet:

 

Although apoptosis, the programmed cell death, is the main mechanisms in follicular atresia and especially postovulatory regression in mammals, its role in fish ovary is still controversial. In order to discuss the possible functions of atresia as a context of apoptosis, the preovulatory follicles of the freshwater teleost, Danio rerio (zebrafish) were investigated by light microscopy. The main characteristics of atresia of vitellogenic oocytes of zebrafish were determined as a significant hypertrophy and hyperplasia of the granulosa cells. The theca cells were also became slightly hyperplasic while the zona radiata was degenerated and the basal membrane located between granulosa and theca was also disintegrated. The aggregation of compacted chromatin in a crescent pattern, and cell fragmentation indicates to formation of apoptotic bodies were evaluated as the morphological evidences for apoptosis in granulosa cells of the oocytes of zebrafish. Towards the end of atresia, the vitellus is fully degenerated and absorbed, some apoptotic bodies were also observed between the translucent clusters of theca cells. Apoptotic process was still continued on when an atrium had been formed. 	 	 		 .

 

Although apoptosis, the programmed cell death, is the main mechanisms in follicular atresia and especially postovulatory regression in mammals, its role in fish ovary is still controversial. In order to discuss the possible functions of atresia as a context of apoptosis, the preovulatory follicles of the freshwater teleost, Danio rerio (zebrafish) were investigated by light microscopy. The main characteristics of atresia of vitellogenic oocytes of zebrafish were determined as a significant hypertrophy and hyperplasia of the granulosa cells. The theca cells were also became slightly hyperplasic while the zona radiata was degenerated and the basal membrane located between granulosa and theca was also disintegrated. The aggregation of compacted chromatin in a crescent pattern, and cell fragmentation indicates to formation of apoptotic bodies were evaluated as the morphological evidences for apoptosis in granulosa cells of the oocytes of zebrafish. Towards the end of atresia, the vitellus is fully degenerated and absorbed, some apoptotic bodies were also observed between the translucent clusters of theca cells. Apoptotic process was still continued on when an atrium had been formed. 	 	 		 .

Makale detayları

Atresia and Apoptosis in Preovulatory Follicles in the Ovary of Danio rerio (Zebrafish)

Yazarlar:

Sema İşisağ ÜÇÜNCÜ | Özlem ÇAKICI

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2009 Vol.9 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

3/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000838510

Sıklık:

Üç Aylık

pISSN:

1303-2712

Atretic follicle

teleost

Danio rerio

apoptosis

Sayı

Makale detayları

Atresia and Apoptosis in Preovulatory Follicles in the Ovary of Danio rerio (Zebrafish)

Yazarlar: Sema İşisağ ÜÇÜNCÜ | Özlem ÇAKICI

Yayıncı: Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi: Turkish Journal of Fisheries and Aquatic Sciences 2009 Vol.9 Issue 2

Belge Tipi: Makale

Yayın Tarihi: 3/2009

Belge Dili: Türkçe

Document ID (Org No.): 2000838510

Sıklık: Üç Aylık

pISSN: 1303-2712

Atretic follicle

teleost

Danio rerio

apoptosis

Sayı

Yazarlar:

Sema İşisağ ÜÇÜNCÜ | Özlem ÇAKICI

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2009 Vol.9 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

3/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000838510

Sıklık:

Üç Aylık

pISSN:

1303-2712