ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (2): 245-250.doi: 10.11843/j.issn.0366-6964.2015.02.010

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Expressions of Cell Cycle Regulation Genes CyclinB1 and p34cdc2 in the Testes of Calves Aged on Different Days

YAO Xiao-lei1,SONG Rui-gao1,LÜ Li-hua1,LI Peng-fei2,LIU Qiang1,HUANG Yang1,CHEN Jian-wei1,JIANG Xiao-long1,CAO Xia1,ZHAO Miao-miao1,ZHANG Gui-hua1,WANG Yong-xin1,SHI Lei 1*   

  1. (1.College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801,China;2.College of Life Science,Shanxi Agricultural University,Taigu 030801,China)
  • Received:2014-10-10 Online:2015-02-23 Published:2015-02-23

Abstract:

This study was performed to investigate the expression of cell cycle regulation genes CyclinB1 and p34cdc2 in testis of calves at different ages.The eighteen 5-6 days healthy Holstein calves (with similar weight) were randomly divided into 3 groups and fed with the similar basal diet.The testes of 2 calves from each group were collected at the time of 30 ,60 and 90 d respectively.QRT-PCR method was used to detect the mRNA expression of the cell cycle regulatory genes CyclinB1 and p34cdc2 in testes of calves at different ages.The location of CyclinB1 and p34cdc2 in the testes was detected by immunohistochemical methods.The results showed that the highest expression of CyclinB1 and p34cdc2 mRNA and protein was obtained in the calves’ testes of 90 d.The mRNA and protein expression levels of CyclinB1 and p34cdc2 increased with the increasing age.The mRNA expression level of the 2 genes at the age of 90 d were significantly higher than that at 30 and 60 d (P<0.05).However,no significant difference was observed between 30 and 60 d (P>0.05).The protein expression of p34cdc2 in the testes of calves at different ages was significant (P<0.05).Although the protein expression of CyclinB1 at 60 and 90 d had no significant difference(P>0.05),they were significantly higher than those at 30 d.This study indicated that the expression of CyclinB1 and p34cdc2  mRNA and protein increased with the increasing age and CyclinB1 and p34cdc2 in the testes of calves at different ages was significant.

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