›› 2015, Vol. 42 ›› Issue (4): 890-895.doi: 10.16431/j.cnki.1671-7236.2015.04.018

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Effect of Cold Stress on Serum Factor and Hsp70 mRNA in Hu Sheep

YANG Li1, ZHANG Li1, QI Ya-yin1, SHEN Wen1, LI Yan2, ZHANG Lu-an2   

  1. 1. College of Animal Science and Technology, Shihezi University, Shihezi 832003, China;
    2. The Xinjiang Production and Construction Corps of Animal Husbandry and Veterinary Station, Urumqi 830063, China
  • Received:2014-09-14 Online:2015-04-20 Published:2015-05-05

Abstract: This experiment was to study the effect of cold stress on the immune system and heat stress proteins 70 (Hsp70) in Hu sheep. Using Real-time fluorescence quantitative PCR and ELISA, the expression quantity of Hsp70 mRNA in Hu sheep's liver, lung, spleen, lymph node tissue and concentrations of IL-4, IL-2 in serum were detected respectively before and after cold stress. The results showed that the Hsp70 mRNA expression quantity in liver, lung and spleen tissues of Hu sheep was extremely significantly increased after cold stress compared with before (P<0.01), and the expression of the liver was particularly significant. After cold stress, the IL-2, IL-4 concentrations in Hu sheep serum showed a decreasing trend, especially IL-4 concentration decreased extremely significantly (P<0.01). The results indicated that enhanced expression of Hsp70 mRNA after cold stress in Hu sheep tissues could improve the animal's function of self-protection and enhance resistance to adverse external stimulate, but the decreases in cytokines IL-2 and IL-4 concentrations indicated that cold stress suppressed the body's immune system.

Key words: cold stress; Hsp70; IL-2; IL-4; Hu sheep

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