Male pronuclear formation in denuded porcine oocytes after in vitro maturation in the presence of cysteamine

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Abstract

The present study was conducted to examine effects of cysteamine in culture medium on progression of meiosis, glutathione (GSH) content, kinase activities (histone H1 kinase and mitogen-activated protein kinase), and male pronuclear formation after in vitro insemination of cumulus-denuded oocytes (DOs) in the pig. DOs, obtained by mechanically removing cells from cumulus- oocyte complexes (COCs) with a small-bore pipette, were cultured for 45 h in TCM199 supplemented with sodium pyruvate, gonadotropins, estradiol, and 10% porcine follicular fluid, with or without cysteamine (150 μM). Maturation rates of DOs cultured with and without cysteamine were not different (60-70%) but were significantly lower than those of COCs (90-100%) (p < 0.05). GSH content of matured DOs cultured with cysteamine was significantly higher than that of DOs cultured without cysteamine (p < 0.05). Values for both types of kinase activity in matured DOs cultured with and without cysteamine were not different (p > 0.05). After in vitro insemination, DOs cultured with cysteamine showed significantly higher rates of male pronuclear formation (80.3 ± 3.0%) than DOs cultured without cysteamine (16.4 ± 0.5%) (p < 0.05). These results indicate that the addition of cysteamine to culture medium increased oocyte GSH content and promoted male pronuclear formation after sperm penetration of porcine DOs but had no effects on their maturation rates or kinase activities.

Original languageEnglish
Pages (from-to)828-833
Number of pages6
JournalBiology of Reproduction
Volume61
Issue number3
DOIs
Publication statusPublished - Sep 2 1999
Externally publishedYes

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In Vitro Oocyte Maturation Techniques
Cysteamine
Oocytes
Swine
Insemination
Culture Media
Phosphotransferases
Cumulus Cells
Sperm-Ovum Interactions
Follicular Fluid
Meiosis
Mitogen-Activated Protein Kinases
Pyruvic Acid
Gonadotropins
Glutathione
Estradiol
Sodium

All Science Journal Classification (ASJC) codes

  • Cell Biology

Cite this

Male pronuclear formation in denuded porcine oocytes after in vitro maturation in the presence of cysteamine. / Yamauchi, Nobuhiko; Nagai, T.

In: Biology of Reproduction, Vol. 61, No. 3, 02.09.1999, p. 828-833.

Research output: Contribution to journalArticle

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