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Cysteamine supplementation during in vitro maturation and embryo culture: a useful tool for increasing the efficiency of bovine in vitro embryo production.

Abstract：

:Cysteamine when added during in vitro maturation (IVM) or in vitro embryo culture (IVC) stimulates glutathione (GSH) synthesis and improves embryo developmental rates. This suggests that GSH synthesis is decreased in the in vitro produced embryo. The present study was carried out to evaluate if addition of cysteamine to culture medium at the same time, during IVM and IVC of bovine oocytes, may promote an overall improvement on the developmental rate and embryo quality. Oocytes were matured in TCM 199 supplemented with 10% (v/v) fetal calf serum, hormones, and 0 or 100 microM of cysteamine for 24 hr. After IVM, the oocytes were fertilized (day 0). Day 2 embryos (2-8 cell) were washed and transferred to fresh IVC medium supplemented with 0, 25, 50, or 100 microM of cysteamine and cultured for 48 hr. After this, embryos were cultured in IVC medium without cysteamine until day 8 of IVC. In the present study, we confirmed our previous results by demonstrating that the percentage of embryos that developed to the blastocyst stage was significantly higher (P < 0.05) when 100 microM of cysteamine was added during IVM, and this was further improved when 100 and 50 microM of cysteamine where present during IVM and IVC, respectively (P < 0.05). After cryopreservation, no differences were observed on embryo development, but a significant increase on embryo hatching was found between unsupplemented and supplemented oocytes with 100 and 50 microM of cysteamine during IVM and IVC, respectively (P < 0.05). We can conclude that GSH synthesis stimulation during bovine IVM with cysteamine, concomitant with GSH stimulation during IVC, will be a useful and simple tool for increasing the efficiency of in vitro bovine embryo production.

journal_name

Mol Reprod Dev

journal_title

Molecular reproduction and development

authors

de Matos DG,Herrera C,Cortvrindt R,Smitz J,Van Soom A,Nogueira D,Pasqualini RS

doi

10.1002/mrd.10087

keywords:

subject

Has Abstract

pub_date

2002-06-01 00:00:00

pages

203-9

issue

eissn

1040-452X

issn

1098-2795

journal_volume

pub_type

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Cysteamine supplementation during in vitro maturation and embryo culture: a useful tool for increasing the efficiency of bovine in vitro embryo production.