ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (10): 1711-1717.doi: 10.11843/j.issn.0366-6964.2014.10.018

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Transcription and Positioning of Avian β-defensin 6 and Chicken TLR15 within the Intestinal Tract of Salmonella pullorum Infected Chicks

WANG Yan 1,ZHOU Xiu-hong 1,Qi Ke-zong1*,TU Jian1,LIU Hong-mei1,PAN Xiao-cheng 2   

  1. (1.College of Animal Science and Technology,Anhui Agricultural University,Hefei 230036,China;2.Anhui Academy of Agricultural Sciences,Hefei 230031,China)
  • Received:2014-02-24 Online:2014-10-23 Published:2014-10-23

Abstract:

The current study was undertaken to analyze the distribution and expression of Avian β-defensin 6 (AvBD6) and chicken TLR15 (ChTLR15) in the small intestine of the chicks infected with Salmonella pullorum.Salmonella pullorum were used to infect chicks at the age of 14 days,and the small intestine (duodenum,jejunum and ileum) of the infected and control chicks were collected at different time points post infection.Fluorescence real-time quantitative PCR and in situ hybridization method were used to detect the positioning and transcription level changes of AvBD6 and ChTLR15 mRNA in the small intestine tissue.The results showed that after the infection of S.pullorumAvBD6 and ChTLR15 were both transcribed in each bowel tissues of the chicks,and the relative transcription in the duodenum was the highest,the relative transcription levels showed a rising trend in the 0-24 h,the relative transcription levels decreased in 24-48 h,the level of AvBD6 and ChTLR15 transcription in 24 h was significantly higher than that of the o h and 6 h (P<0.01),and the transcription of AvBD6 in 24 h was significantly higher than that of the 12 h (P<0.05).AvBD6 and ChTLR15 mRNA were distributed in the intestinal tissue,which were mainly distributed in the central lacteals of the intestinal villus,fluorescence signal in the duodenum was the strongest.These results indicated that chicks infected with S.pullorum,the transcription and distribution of AvBD6 and ChTLR15 mRNA in chicks’ intestine has certain regularity,and participate in the intestinal immune regulation function.

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