TY  - JOUR
T1  - Meiotic Competence and DNA Damage of Porcine Oocytes from Ovaries Exposed to an Elevated Temperature
AU - , Budiyanto Agung AU - , Farid Barati AU - , Yukine Kaedei AU - , Fuminori Tanihara AU - , Takeshige Otoi 
JO  - Journal of Animal and Veterinary Advances
VL  - 7
IS  - 10
SP  - 1179
EP  - 1183
PY  - 2008
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2008.1179.1183
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2008.1179.1183
KW  - Heat stress
KW  -storage
KW  -apoptosis
KW  -oocyte maturation
AB  - The present study was conducted to investigate the effects of the exposure length of ovaries to an elevated temperature (41°C) on the meiotic competence and DNA damage of oocytes. Ovaries were stored in physiological saline at 41°C for 0 h (control), 0.5, 1.0 and 1.5 h. After exposure of ovaries to the elevated temperature, oocytes were collected and then cultured for 44 h. The length of exposure of ovaries to 41°C had no effect on the proportions of total oocytes with DNA-fragmented nuclei before maturation culture, but it did influence the proportions at the end of maturation culture. The proportion of oocytes reaching metaphase II (MII) significantly decreased with increasing exposure time. In addition, significantly more oocytes from ovaries exposed to 41°C for 1.5 h had DNA-fragmented nuclei compared with control oocytes. These results indicate that the meiotic competence and DNA damage of porcine oocytes are dependent on the duration of exposure of ovaries to the elevated temperature. Moreover, the occurrence of DNA damage in oocytes becomes more apparent after maturation culture than before the culture.
ER  -