Premium
Excessive concentration of glucose during in vitro maturation impairs the developmental competence of bovine oocytes after in vitro fertilization: Relevance to intracellular reactive oxygen species and glutathione contents
Author(s) -
Hashimoto Shu,
Minami Naojiro,
Yamada Masayasu,
Imai Hiroshi
Publication year - 2000
Publication title -
molecular reproduction and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.745
H-Index - 105
eISSN - 1098-2795
pISSN - 1040-452X
DOI - 10.1002/1098-2795(200008)56:4<520::aid-mrd10>3.0.co;2-0
Subject(s) - biology , in vitro , reactive oxygen species , human fertilization , intracellular , in vitro maturation , oocyte , glutathione , microbiology and biotechnology , in vitro fertilisation , andrology , biochemistry , genetics , embryo , enzyme , medicine
The effect of glucose (0, 1.5, 5.6 or 20.0 mM) in synthetic oviduct fluid supplemented with 20 amino acids (SOFaa) on the developmental competence of bovine oocytes after in vitro fertilization was investigated. Intracellular reactive oxygen species (ROS) and the glutathione content of bovine oocytes matured in SOFaa containing 0–20.0 mM glucose were also examined. When oocytes were matured in SOFaa without glucose, the nuclear maturation rate was lower than that in oocytes matured in glucose‐containing medium. The developmental competence to the blastocyst stage of oocytes matured in 1.5 mM glucose was higher than that of oocytes matured in 20.0 mM glucose. In addition, the intracellular ROS content of oocytes matured in 0, 1.5 or 5.6 mM glucose was lower than that of oocytes matured in 20.0 mM glucose. Furthermore, the intracellular glutathione content of oocytes matured in 0, 1.5 or 5.6 mM glucose was higher than that of oocytes matured in 20.0 mM glucose. These results show that excessive glucose in the medium for oocyte maturation impairs the development of bovine oocytes to the blastocyst stage, possibly due to the increase of ROS and the decrease in the intracellular glutathione content of bovine oocytes. Mol. Reprod. Dev. 56:520–526, 2000. © 2000 Wiley‐Liss, Inc.