[A Novel Method for Increasing the Number of Metaphase Cells Cultured in vitro.].
To increase the number of metaphase cells cultured in vitro, two bovine fibroblast cell lines (YFF and CNF) were frozen at 4 degrees for different length of time prior to colchicine treatment , and then chromosomal specimen were prepared. The percentage of metaphase cells was examined under conditions above. Using this method, the variation rate of karyotype of YFF and CNF subcultured up to passage 20 were also analyzed. It was found that the percentage of YFF and CNF metaphase cells in treatment group were significantly higher than that in control group (p0.05), and the number of YFF and CNF metaphase cells obtained in 20 h treatment group were increased more than 6 fold as many as that in control group (p0.01), 31.7% and 40.2% vs 4.7% and 6.4% ,respectively. These data suggest that the method of freezing at 4 degrees could be used for increasing the number of metaphase cells in vitro conveniently, and analyzing the variation rate of karyotype of cultured cells efficiently.
Key Laboratory of Livestock Reproduction and Breeding Biotechnology of Ministry of Agriculture, Xinjiang Academy of Animal Science, Urumqi 830000, China, Email: houying69@hotmail.com.
Ying
Y
Hou
Li-Xin
LX
Tan
Wen-Rong
WR
Li
Zhi-Gang
ZG
Niu
Zhi-Qin
ZQ
Guo
D000818:Animals; D002875:Chromosomes; D007621:Karyotyping; D008677:Metaphase; D009865:Oocytes