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Vertebrate reproductive science and technology
RESEARCH ARTICLE

Follicular fluid exosomes act on the bovine oocyte to improve oocyte competence to support development and survival to heat shock

Thais A. Rodrigues https://orcid.org/0000-0003-4195-0902 A , Kubra M. Tuna B , Abdel A. Alli B , P. Tribulo C , P. J. Hansen https://orcid.org/0000-0003-3061-9333 C , Jin Koh D and F. F. Paula-Lopes A E
+ Author Affiliations
- Author Affiliations

A Department of Biological Sciences, Federal University of São Paulo, 275 Professor Arthur Riedel Street, 09972-270, Diadema, Sao Paulo, Brazil.

B Department of Physiology and Functional Genomics, University of Florida, Gainesville, FL 32611-0910, USA.

C Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA.

D Proteomics and Mass Spectrometry Laboratory, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL 32611-0910, USA.

E Corresponding author. Email: ffpaulalopes@gmail.com

Reproduction, Fertility and Development 31(5) 888-897 https://doi.org/10.1071/RD18450
Submitted: 23 June 2018  Accepted: 5 December 2018   Published: 14 February 2019

Abstract

Addition of follicular fluid to oocyte maturation medium can affect cumulus cell function, increase competence of the oocytes to be fertilised and develop to the blastocyst stage and protect the oocyte from heat shock. Here, it was tested whether exosomes in follicular fluid are responsible for the effects of follicular fluid on the function of the cumulus–oocyte complex (COC). This was accomplished by culturing COCs during oocyte maturation at 38.5°C (body temperature of the cow) or 41°C (heat shock) with follicular fluid or exosomes derived from follicular fluid and evaluating various aspects of function of the oocyte and the embryo derived from it. Negative effects of heat shock on cleavage and blastocyst development, but not cumulus expansion, were reduced by follicular fluid and exosomes. The results support the idea that exosomes in follicular fluid play important roles during oocyte maturation to enhance oocyte function and protect it from stress.

Additional keywords: cumulus cells, electronic microscopy, embryo, oocyte maturation, proteomics.


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