ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (4): 561-567.doi: 10.11843/j.issn.0366-6964.2015.04.008

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Comparison of the mRNA Levels of FABP5 and FABP9 Genes and Activities of Some Enzymes Related to Energy Metabolism in the Testes of Yak and Sterile F1 Male Hybrids between Male Cattle and Female Yak

FU Wei1,HUANG Lin1,LIU Wen-jing2,REN Liang1,LI Cai-xia1,JIN Su-yu1,LIN Ya-qiu1,ZHENG Yu-cai1*   

  1. (1.College of Life Science and Technology,Southwest University for Nationalities,Chengdu 610041,China;2.School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010,China)
  • Received:2014-07-02 Online:2015-04-23 Published:2015-04-23

Abstract:

The epidermal type fatty acid binding protein (FABP5) and testicular fatty acid binding protein (FABP9) genes of yak were sequenced,and their expressions as well as activities of some enzymes related to energy metabolism in the testes were compared between yak and sterile F1 males (male cattle × female yak),aiming to explore the association between the two genes and energy metabolism with the sterility of F1 males.Total RNA was extracted from yak testes and the cDNA sequences of FABP5 and FABP9 genes were obtained using conventional PCR methods.The coding region of yak FABP5 and FABP9 genes were 408 and 399 bp,respectively,and showed 1 and 6 nucleotide differences compared with those of cattle,respectively,the latter caused 5 amino acid substitutions in the deduced amino acid sequences.Real-time quantitative PCR analysis showed that the expression of FABP5 gene in the sterile F1 testes was significantly greater than yak,but not for FABP9 gene.Isocitrate dehydrogenase activity in sterile F1 testes was significantly higher than yak (P<0.01),while β-hydroxyacyl CoA dehydrogenase and lactate dehydrogenase activities were similar in the testes of yak and sterile F1 males.The up-regulated expression of FABP5 gene and the increased activity of isocitrate dehydrogenase involved in citric acid cycle in the sterile F1 testes may indicate that the level of fatty acid oxidation for energy is higher in the testes of sterile F1 males than adult yak.

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