China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (1): 296-302.doi: 10.16431/j.cnki.1671-7236.2021.01.033

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Study on the Growth and Decline Characteristics of Some Cytokines in Sheep after Infected with Bluetongue Virus Type 16

MIAO Haisheng, KOU Meiling, XIE Jiarui, LI Le, LI Huachun   

  1. Yunnan Tropical and Subtropical Animal Virus Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming 650224, China
  • Received:2020-05-08 Online:2021-01-20 Published:2021-01-15

Abstract: The purpose of this experiment was to investigate the growth and decline characteristics of IFN-γ,IL-2,IL-4,IL-10 of sheep after infection with bluetongue virus type 16 (BTV16).In this study,the mRNA of the above four cytokines were detected in three sheep infected with BTV16 using the Real-time quantitative PCR method.At the same time,negative control sheep were set up,and the relative expression of mRNA were calculated based on 0 d mRNA.Meanwhile,virus antibody titers were detected and sheep body temperature was measured.The results showed that all the three sheep inoculated with BTV16 had different degrees of antibody and body temperature symptoms,the mRNA levels of the four cytokines increased significantly within 2-4 days after inoculation of the virus.Among them,the peak value of IFN-γ was 2.58-27.84 times,the peak value of IL-2 was 5.24-17.19 times,the peak value of IL-4 was 2.16-3.43 times,and the peak value of IL-10 was 15.78-48.77 times.There were significant individual differences in the increase amplitude,and all the four cytokines decreased gradually after being kept at a high level for about 6 d.The above parameters of control sheep fluctuated within the normal range with no significant difference (P>0.05).This study elucidated the growth and decline characteristics of IFN-γ,IL-2,IL-4 and IL-10 in sheep inoculated with BTV16 at the transcriptional level,providing references for further studies on the characteristics of BTV infection and the immune mechanism of host organism.

Key words: bluetongue virus type 16 (BTV16); cytokine; mRNA; growth and decline characteristics

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