title: Distribution of the type I interferon in different organs of chicken digestive system.
abstract: OBJECTIVE
  Distribution of the type I interferon in different organs of the chicken digestive system.
  
  
  METHODS
  In order to obtain a certain length (274 bp) of a fragment, a pair of primers was designed according to the conserved nucleotide sequence of gallus IFNAR-1 (EU477527.1) fragment that was published by the GenBank. The fragment was cloned by pEASY-T1 and amplified by relative fluorescence quantitative PCR with SYBR Green I; according to the results, we made a standard curve. The experimental group took interferon orally, while the control group took equivalent physiological saline orally, then we used relative fluorescence quantitative PCR to detect the copies of the IFNAR-1 gene of the palate, tongue, esophagus, craw, glandular stomach, duodenum and rectum of the experimental group and control group. Copies of the IFNAR-1 gene of those organs were calculated by Ct value. Finally, all the chickens were infected with the Newcastle Disease Virus after 48 hours.
  
  
  RESULTS
  The results showed that the IFNAR-1 gene had the most expression in the esophagus. In the experiment of interferon antiviral activity detection, the chickens which took interferon orally were healthier than the other group.
  
  
  CONCLUSIONS
  It is confirmed that the interferon receptor did exist in the digestive organs. However, according to the physical and chemical properties of interferon, interferon is easily inactivated in the acid and alkali environment, by pepsin and trypsin, so the absorption site for interferon exists in organs above the craw, especially in the esophagus and tongue.
authors.affiliation: Shandong Agricultural University, Shandong, China.
authors.forename: Shu-Yuan
authors.initials: SY
authors.lastname: Guo
authors.affiliation: Shandong Agricultural University, Shandong, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.affiliation: Shandong Agricultural University, Shandong, China.
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Dai
authors.affiliation: Shandong Agricultural University, Shandong, China.
authors.forename: Cui
authors.initials: C
authors.lastname: Zhao
authors.affiliation: Shandong Agricultural University, Shandong, China.
authors.forename: Wei-Shan
authors.initials: WS
authors.lastname: Chang
keywords: interferon antiviral activity; interferon receptor; oral interferon; relative fluorescence quantitative PCR