ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (6): 940-948.doi: 10.11843/j.issn.0366-6964.2015.06.009

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Effect of LDL from Pigeon Egg Yolk on the Expression of HSP70 and Apoptosis-related Gene in Cold Shock and Frozen-thawed Boar Spermatozoa

LIU Yang,HUANG He-lu,DONG Hai-tao,JIN Yi*   

  1. (Agricultural College of Yanbian University,Yanji 133002,China)
  • Received:2015-01-15 Online:2015-06-23 Published:2015-06-23

Abstract:

The purpose of this study is to investigate the effects of LDL from pigeon egg yolk on expression of HSP70 and apoptosis related genes in cold-shocked and frozen-thawed boar spermatozoa.This study divided into 5 groups:fresh sperm group,3% LDL(-80 and -196 ℃) treatment groups,9%LDL(-80 and -196 ℃)treatment groups.The addition of LDL with different concentrations has effect on biological features of the spermatozoa before and after cold-shock and frozen-thawed treatments ,which was analysed by CASA,and changes in expression of HSP70 and apoptosis-related genes were analysed and checked by SDS-PAGE,Western blotting and PCR.The results showed that:HSP70 expression was higher than that of fresh sperm after freezing,there was no significant difference between HSP70 expression of frozen-thawed stored at -196 ℃ with addition of 9% pigeon egg and fresh spermatozoa in treatment group(P>0.05);in the experiment of anti-apoptosis gene Bcl-x1,Bcl-21,gene expression in fresh sperm treatment group was higher than other treatment groups(P>0.05);in the expression of pro-apoptotic Bak gene,the expression of fresh sperm was the lowest,there was no significant difference between Bak gene of the 9% LDL(-196 ℃) treatment group and fresh spermatozoa in treatment group(P>0.05).Addition of LDL from pigeon egg yolk could reduce the damage caused by freezing and thawing,maintain biological features and improve the survival of the pig spermatozoa.

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