CHILLING SENSITIVITY OF MAMMALIAN EMBRYOS

被引:168
作者
POLLARD, JW
LEIBO, SP
机构
[1] Department of Biomedical Sciences University of Guelph., Guelph
基金
加拿大自然科学与工程研究理事会;
关键词
EMBRYOS; IN-VITRO PRODUCTION; CHILLING INJURY; CRYOPRESERVATION;
D O I
10.1016/S0093-691X(05)80054-8
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Thousands of live young of domestic animals have been produced by the transfer of cryopreserved embryos, indicating that such embryos can withstand exposure to extreme subzero temperatures. Paradoxically, some types of embryos may be severely altered or damaged simply by being cooled below physiological temperatures. For example, in vivo-derived embryos of pigs and in vitro-derived embryos of cattle are extremely sensitive to chilling below +14-degrees-C, whereas in vivo-derived embryos of cattle and sheep are not. This chilling sensitivity is dependent on the embryo's stage of development, and on the conditions under which it develops. Furthermore, an embryo's chilling sensitivity appears to be correlated with its freezing sensitivity. Understanding the basis of chilling injury will undoubtedly lead to a better understanding of freezing sensitivity, as well as of early embryology of domestic animals.
引用
收藏
页码:101 / 106
页数:6
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