Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle

Fine structures of the ovary during the oestrous cycle in African giant rats (Cricetomys gambianus Waterhouse) were described in the present study. Ultrastructural features of the germinal epithelium and the medullar of the ovary were similar at different stages of the oestrous cycle. During mid pro...

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Autores principales:	Akinloye,Adebayo Koyuum, Oke,Bankole Olusiji
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2014
Materias:	Ultrastructure Ovary Oestrous Cyclei African Giant Rat
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200030
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spelling	oai:scielo:S0717-950220140002000302015-11-16Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous CycleAkinloye,Adebayo KoyuumOke,Bankole Olusiji Ultrastructure Ovary Oestrous Cyclei African Giant Rat Fine structures of the ovary during the oestrous cycle in African giant rats (Cricetomys gambianus Waterhouse) were described in the present study. Ultrastructural features of the germinal epithelium and the medullar of the ovary were similar at different stages of the oestrous cycle. During mid proestrus, there was disorganization of the inner layer of the granulosa cells of secondary follicles to form the antrum. At late proestrus/early estrus, antrum formation had advanced and there was evidence of reorganization of granulosa cells. Fine structures of the ovary during mid estrus include follicles with variably shaped mitochondria, profiles of Golgi complexes and dense concentration of ribosomes. The theca interna shared similar ultrastructure with the granulosa cells containing, in addition, lipid droplets and smooth endoplasmic reticulum. Cellular ultrastructure observed during mid metestrus showed commencement of differentiation of corpus luteum. At mid diestrus, the general ultrastructural architecture of the ovarian follicles showed disorganized cellular contents and corpus luteum was recognized with conspicuous depolarization of the basement membrane originally separating granulosa cells from the theca. At late diestrus/early proestrus, granulosa cells displayed numerous mitochondria of variable sizes and shapes. Ribosomes were evenly distributed throughout the cytoplasm while electron lucid vesicles were sparsely distributed. The results of this study showed that fine structural changes in the ovary of the giant rat during the oestrous cycle are similar to those of laboratory rodents.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.32 n.2 20142014-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200030en10.4067/S0717-95022014000200030
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ultrastructure Ovary Oestrous Cyclei African Giant Rat
spellingShingle	Ultrastructure Ovary Oestrous Cyclei African Giant Rat Akinloye,Adebayo Koyuum Oke,Bankole Olusiji Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
description	Fine structures of the ovary during the oestrous cycle in African giant rats (Cricetomys gambianus Waterhouse) were described in the present study. Ultrastructural features of the germinal epithelium and the medullar of the ovary were similar at different stages of the oestrous cycle. During mid proestrus, there was disorganization of the inner layer of the granulosa cells of secondary follicles to form the antrum. At late proestrus/early estrus, antrum formation had advanced and there was evidence of reorganization of granulosa cells. Fine structures of the ovary during mid estrus include follicles with variably shaped mitochondria, profiles of Golgi complexes and dense concentration of ribosomes. The theca interna shared similar ultrastructure with the granulosa cells containing, in addition, lipid droplets and smooth endoplasmic reticulum. Cellular ultrastructure observed during mid metestrus showed commencement of differentiation of corpus luteum. At mid diestrus, the general ultrastructural architecture of the ovarian follicles showed disorganized cellular contents and corpus luteum was recognized with conspicuous depolarization of the basement membrane originally separating granulosa cells from the theca. At late diestrus/early proestrus, granulosa cells displayed numerous mitochondria of variable sizes and shapes. Ribosomes were evenly distributed throughout the cytoplasm while electron lucid vesicles were sparsely distributed. The results of this study showed that fine structural changes in the ovary of the giant rat during the oestrous cycle are similar to those of laboratory rodents.
author	Akinloye,Adebayo Koyuum Oke,Bankole Olusiji
author_facet	Akinloye,Adebayo Koyuum Oke,Bankole Olusiji
author_sort	Akinloye,Adebayo Koyuum
title	Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
title_short	Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
title_full	Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
title_fullStr	Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
title_full_unstemmed	Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle
title_sort	ultrastructural features of ovary of the female african giant rat (cricetomys gambianus, waterhouse) during oestrous cycle
publisher	Sociedad Chilena de Anatomía
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200030
work_keys_str_mv	AT akinloyeadebayokoyuum ultrastructuralfeaturesofovaryofthefemaleafricangiantratcricetomysgambianuswaterhouseduringoestrouscycle AT okebankoleolusiji ultrastructuralfeaturesofovaryofthefemaleafricangiantratcricetomysgambianuswaterhouseduringoestrouscycle
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Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle

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