Evaluation of apoptosis as a mechanism of follicular cell atresia in the ovaries of cattle (bos indicus) and buffalo (bubalus bubalis) fetuses
Anim. Reprod. (Online)
;
10(1): 55-61, 2013. ilus, tab
Article
in English
| LILACS, VETINDEX
| ID: biblio-1461045
ABSTRACT
The objective of this study was to investigate the occurrence of apoptosis in the ovaries of cattle and buffalo fetuses between 4 and 8 months old by the terminal deoxynucleotidyltransferase - mediated dUTP nick end labeling (TUNEL) assay . Histological analysis of the ovarian t issue showed that apoptosis occurred at all ages evaluated , presenting a similar pattern among different fetal stages in both species . Within species, secondary follicles displayed a higher (P 0.05) of apoptotic follicular cells among the three follicular classes compared . C omparing resul ts between species, secondary follicles had a higher (P < 0.05) mean number of TUN EL positive cells in bovine fetuses; however , this difference was proportional to the larger number of follicular cells present in secondary follicles in this species . In summary, the TUNEL method was effective for the detection of apoptosis in the support ing cells of ovarian follicles from bovine and buffalo fetuses with apoptosis occurring at similar rates in both species between 4 and 8 months of gestational age. Further studies are needed to better understand the dynamics of apoptosis as a regulator of follicular atresia in fetal ovaries from these species, as well as the potential involvement of the oocyte in this process.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Ovary
/
Apoptosis
/
Fetus
/
Ovarian Follicle
Limits:
Animals
Language:
English
Journal:
Anim. Reprod. (Online)
Year:
2013
Type:
Article
Institution/Affiliation country:
Instituição Federal de Educação Tecnológica do Pará/BR
/
Universidade Federal do Pará/BR
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