title: Detection of differential expression of porcine IFN-alpha subtypes by reverse transcription polymerase chain reaction.
abstract: The porcine interferon-alpha (IFN-alpha) multigene family is a new IFN-alpha system in recent research. Characterization of the PoIFN-alpha multigene family has been described in our previous work, and 14 functional PoIFN-alpha genes were detected in the porcine genome. In this study, we designed subtype-specific primers and consensus primers for PoIFN-alpha. The expression of PoIFN-alpha was detected using the two PCR strategies in three systems, namely, poly(I).poly(C)-DEAE-dextran-induced PK15 cells, pseudorabies virus-infected PK15 cells, and infected PK15 cells with an attenuated strain of swine fever virus, respectively. In poly(I).poly(C)-DEAE-dextran-induced PK15 cells, the expression of IFN-alpha2, -alpha3, -alpha4, -alpha8, and -alpha9 after 6-h/24-h inducement in PK15 cells were observed. In pseudorabies virus-infected PK15 cells, the expression of PoIFN-alpha2, -alpha3, -alpha8, -alpha9, -alpha10, and -alpha13 was observed after 6-h/24-h infection, and in the attenuated strain of swine fever virus-infected PK15 cells, upregulation of PoIFN-alpha2, -alpha3, -alpha4, -alpha8, -alpha9, and -alpha10 was detected. The results of realtime quantitative PCR analysis suggested that the expression was time-dependent in pseudorabies virus/poly(I).poly(C)-DEAE-dextran-induced PK15 cells, but in the attenuated swine fever virus-infected PK15 system, the expression level of IFN-alpha subtypes was not obviously time dependent.
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Science, Fudan University, Shanghai 200433, P.R. China.
authors.forename: Gong
authors.initials: G
authors.lastname: Cheng
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.forename: Weizao
authors.initials: W
authors.lastname: Chen
authors.forename: Weiyao
authors.initials: W
authors.lastname: Yan
authors.forename: Mingqiu
authors.initials: M
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Zheng
mesh_terms: D000818:Animals; D002460:Cell Line; D005786:Gene Expression Regulation; D007369:Interferon Inducers / Q000494:pharmacology; D016898:Interferon-alpha / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013552:Swine
chemical_list: D007369:Interferon Inducers; D016898:Interferon-alpha