Document Detail

Oocyte mitochondrial bioenergy potential and oxidative stress: within-/between-subject, in vivo versus in vitro maturation, and age-related variations in a sheep model.
MedLine Citation:
PMID:  22260855     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To analyze within-/between-subject, in vivo versus in vitro maturation (IVM), and age-related variations of mitochondrial (mt) bioenergy potential and oxidative status of metaphase II (MII) oocytes recovered from hormonally stimulated sheep. DESIGN: Prospective study. SETTING: Academic basic research laboratory. SUBJECT(S): Ten adult ewes. INTERVENTION(S): Estrus synchronization, controlled ovarian hyperstimulation (COH), ovariohysterectomy; follicular and oviductal oocyte retrieval; IVM of follicular oocytes. MAIN OUTCOME MEASURE(S): Mean ± SD, within-subject (CV(w)) and between-subject (CV(b)) variation coefficients of mt activity, intracellular reactive oxygen species (ROS) levels, and mt/ROS colocalization in sheep oocytes from young and aged donors and matured in vivo (in vivo MIIs) or in vitro (IVM MIIs). RESULT(S): Within- and between-subject, in vivo versus IVM, and age-related variations of mt activity were observed in MII oocytes from hormonally stimulated donor sheep. ROS levels increased significantly in oocytes from aged donors. Mt-ROS colocalization was consistently higher in in vivo MIIs compared with IVM MIIs. Oviductal energy/antioxidant ability is influenced by COH. CONCLUSION(S): Oocyte energy/oxidative status is affected by within-/between-subject, in vivo versus IVM, and age-related variations. Mt/ROS colocalization is a reliable marker of in vivo MII oocytes.
Nicola Antonio Martino; Giovanni Michele Lacalandra; Manuel Filioli Uranio; Barbara Ambruosi; Michele Caira; Fabio Silvestre; Flavia Pizzi; Salvatore Desantis; Gianluca Accogli; Maria Elena Dell'aquila
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-17
Journal Detail:
Title:  Fertility and sterility     Volume:  -     ISSN:  1556-5653     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372772     Medline TA:  Fertil Steril     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.
Department of Animal Production, Aldo Moro University of Bari, Bari, Italy.
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