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Expression of angiotensin II receptors in the caprine ovary and improvement of follicular viability in vitro

Published online by Cambridge University Press:  14 October 2015

J.B. Bruno ,
I.B. Lima-Verde ,
J.J.H. Celestino ,
L.F. Lima ,
M.H.T. Matos ,
L.R. Faustino ,
M.A.M. Donato ,
C.A. Peixoto ,
C.C. Campello  and
J.R.V. Silva
...Show all authors
J.B. Bruno*
Affiliation:
Programa de Pós-Graduação em Ciências Veterinárias (PPGCV). Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais (LAMOFOPA). Universidade Estadual do Ceará (UECE).Av. Paranjana, 1700, Campus do Itaperi. Fortaleza, CEBrasilCEP 60740 903.
I.B. Lima-Verde
Affiliation:
Institute for Technology and Research, Tiradentes University, Aracaju-SE, Brazil.
J.J.H. Celestino
Affiliation:
Institute of Health Sciences, University of International Integration Lusophone African-Brazilian, Acarape-CE, Brazil.
L.F. Lima
Affiliation:
Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza-CE, Brazil.
M.H.T. Matos
Affiliation:
Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina-PE, Brazil.
L.R. Faustino
Affiliation:
Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza-CE, Brazil.
M.A.M. Donato
Affiliation:
Laboratory of Ultrastructure, CPqAM/Fiocruz, Federal University of Pernambuco, Recife-PE, Brazil.
C.A. Peixoto
Affiliation:
Laboratory of Ultrastructure, CPqAM/Fiocruz, Federal University of Pernambuco, Recife-PE, Brazil.
C.C. Campello
Affiliation:
Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza-CE, Brazil.
J.R.V. Silva
Affiliation:
Biotechnology Nucleus of Sobral (NUBIS), Federal University of Ceara, Sobral-CE, Brazil.
J.R. Figueiredo
Affiliation:
Faculty of Veterinary Medicine, LAMOFOPA, PPGCV, State University of Ceara, Fortaleza-CE, Brazil.
*
All correspondence to: J.B. Bruno. Programa de Pós-Graduação em Ciências Veterinárias (PPGCV). Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais (LAMOFOPA). Universidade Estadual do Ceará (UECE). Av. Paranjana, 1700, Campus do Itaperi. Fortaleza, CE Brasil CEP 60740 903. Tel.: +55.85.3101.9852. Fax: +55.85.3101.9840. E-mail: [email protected]
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Summary

This study aimed to evaluate mRNA levels of angiotensin II (ANG II) receptors (AGTR1 and AGTR2) in caprine follicles and to investigate the influence of ANG II on the viability and in vitro growth of preantral follicles. Real-time polymerase chain reaction (PCR) was used to quantify AGTR1 and AGTR2 mRNA levels in the different follicular stages. For culture, caprine ovaries were collected, cut into 13 fragments and then either directly fixed for histological and ultrastructural analysis (fresh control) or placed in culture for 1 or 7 days in α-minumum essential medium plus (α-MEM+) with 0, 1, 5, 10, 50 or 100 ng/ml ANG II. Then, the fragments were destined to morphological, viability and ultrastructural analysis. The results showed that primordial follicles had higher levels of AGTR1 and AGTR2 mRNA than secondary follicles. Granulosa/theca cells from antral follicles had higher levels of AGTR1 mRNA than their respective cumulus–oocyte complex (COCs). After 7 days of culture, ANG II (10 or 50 ng/ml) maintained the percentages of normal follicles compared with α-MEM+. Fluorescence and ultrastructural microscopy confirmed follicular integrity in ANG II (10 ng/ml). In conclusion, a high expression of AGTR1 and AGTR2 is observed in primordial follicles. Granulosa/theca cells from antral follicles had higher levels of AGTR1 mRNA. Finally, 10 ng/ml ANG II maintained the viability of caprine preantral follicles after in vitro culture.

Keywords

Angiotensin IICaprineCultureOvaryPreantral follicles
Type
Research Article
Information
Zygote , Volume 24 , Issue 4 , August 2016 , pp. 568 - 577
Copyright
Copyright © Cambridge University Press 2015 

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