PMID- 24136204 OWN - NLM STAT- MEDLINE DCOM- 20141209 LR - 20211021 IS - 1976-555X (Electronic) IS - 1229-845X (Print) IS - 1229-845X (Linking) VI - 15 IP - 1 DP - 2014 TI - Positive effects of porcine IL-2 and IL-4 on virus-specific immune responses induced by the porcine reproductive and respiratory syndrome virus (PRRSV) ORF5 DNA vaccine in swine. PG - 99-109 AB - The purpose of this study was to investigate the effects of porcine interleukin (IL)-2 and IL-4 genes on enhancing the immunogenicity of a porcine reproductive and respiratory syndrome virus ORF5 DNA vaccine in piglets. Eukaryotic expression plasmids pcDNA-ORF5, pcDNA-IL-2, and pcDNA-IL-4 were constructed and then expressed in Marc-145 cells. The effects of these genes were detected using an indirect immunofluorescent assay and reverse transcription polymerase chain reaction (RT-PCR). Characteristic fluorescence was observed at different times after pcDNA- ORF5 was expressed in the Marc-145 cells, and PCR products corresponding to ORF5, IL-2, and IL-4 genes were detected at 48 h. Based on these data, healthy piglets were injected intramuscularly with different combinations of the purified plasmids: pcDNA-ORF5 alone, pcDNA-ORF5 + pcDNA-IL-2, pcDNA-ORF5 + pcDNA-IL-4, and pcDNA-ORF5 + pcDNA- IL-4 + pcDNA-IL-2. The ensuing humoral immune responses, percentages of CD4(+) and CD8(+) T lymphocytes, proliferation indices, and interferon-g expression were analyzed. Results revealed that the piglets co-immunized with pcDNA-ORF5 + pcDNA-IL-4 + pcDNA-IL-2 plasmids developed significantly higher antibody titers and neutralizing antibody levels, had significantly increased levels of specific T lymphocyte proliferation, elevated percentages of CD4(+) and CD8(+) T lymphocytes, and significantly higher IFN-gamma production than the other inoculated pigs (p < 0.05). FAU - Tang, Deyuan AU - Tang D AD - Department of Animal Science, Guizhou University, Guiyang 550025, China.tdyuan@163.com. FAU - Liu, Jian AU - Liu J FAU - Li, Chunyan AU - Li C FAU - Zhang, Hua AU - Zhang H FAU - Ma, Ping AU - Ma P FAU - Luo, Xianfeng AU - Luo X FAU - Zeng, Zhiyong AU - Zeng Z FAU - Hong, Nining AU - Hong N FAU - Liu, Xia AU - Liu X FAU - Wang, Bin AU - Wang B FAU - Wang, Feng AU - Wang F FAU - Gan, Zhenlei AU - Gan Z FAU - Hao, Fei AU - Hao F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131018 PL - Korea (South) TA - J Vet Sci JT - Journal of veterinary science JID - 100964185 RN - 0 (Interleukin-2) RN - 0 (Recombinant Proteins) RN - 0 (Vaccines, DNA) RN - 0 (Viral Envelope Proteins) RN - 0 (Viral Vaccines) RN - 0 (glycoprotein 5, PRRSV) RN - 207137-56-2 (Interleukin-4) SB - IM MH - Animals MH - Cell Line MH - Escherichia coli/genetics MH - Haplorhini MH - Immunity, Cellular MH - Interleukin-2/genetics/*metabolism MH - Interleukin-4/genetics/*metabolism MH - Neutralization Tests/veterinary MH - Plasmids MH - Porcine Reproductive and Respiratory Syndrome/*prevention & control MH - Porcine respiratory and reproductive syndrome virus/*immunology MH - Recombinant Proteins/genetics/metabolism MH - Swine MH - Vaccines, DNA/immunology MH - Viral Envelope Proteins/*genetics/metabolism MH - Viral Vaccines/*immunology PMC - PMC3973771 OTO - NOTNLM OT - IL-2 OT - IL-4 OT - ORF5 DNA vaccine OT - immunogenicity OT - porcine reproductive and respiratory syndrome virus EDAT- 2013/10/19 06:00 MHDA- 2014/12/15 06:00 PMCR- 2014/03/01 CRDT- 2013/10/19 06:00 PHST- 2012/11/12 00:00 [received] PHST- 2013/07/09 00:00 [accepted] PHST- 2013/10/19 06:00 [entrez] PHST- 2013/10/19 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] PHST- 2014/03/01 00:00 [pmc-release] AID - jvs.2013.070 [pii] AID - 10.4142/jvs.2014.15.1.99 [doi] PST - ppublish SO - J Vet Sci. 2014;15(1):99-109. doi: 10.4142/jvs.2014.15.1.99. Epub 2013 Oct 18.