PMID- 12921727 OWN - NLM STAT- MEDLINE DCOM- 20040427 LR - 20190901 IS - 0021-9975 (Print) IS - 0021-9975 (Linking) VI - 129 IP - 2-3 DP - 2003 Aug-Oct TI - Expression of interleukin-10 and interleukin-12 in piglets experimentally infected with porcine reproductive and respiratory syndrome virus (PRRSV). PG - 205-12 AB - The expression of mRNA encoding interleukin-10 (IL-10) and IL-12 was studied, by the reverse transcription-polymerase chain reaction and by in-situ hybridization with a non-radioactive digoxigenin-labelled cDNA probe, in formalin-fixed, paraffin wax-embedded lung tissue from piglets inoculated intranasally with a Korean isolate (North American genotype) of porcine reproductive and respiratory syndrome virus (PRRSV). IL-12p35-positive cells were detected in the lung at 1 day post-inoculation (dpi), their number increasing at 5 dpi, and rapidly decreasing thereafter. In contrast, IL-10- and IL-12p40-positive cells were detected in the lung at 1 dpi, their number increasing at 3 dpi, and rapidly decreasing thereafter. Hybridization signals for IL-10, IL-12p35 and IL-12p40 were always associated with inflammation. Expression of these cytokines was minimal in non-lesional lung of PRRSV-infected piglets and in normal lung from control piglets. In-situ hybridization in serial sections of lung tissues indicated close co-localization of PRRSV and these cytokines in interstitial pneumonia. The results suggest that the expression of IL-10 and IL-12 plays a role in pulmonary defence mechanisms against PRRSV infection. FAU - Chung, H-K AU - Chung HK AD - Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, San 56-1, Shillim-Dong, Kwanak-Gu 151-742, Seoul, South Korea. FAU - Chae, C AU - Chae C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Comp Pathol JT - Journal of comparative pathology JID - 0102444 RN - 0 (RNA, Messenger) RN - 0 (RNA, Viral) RN - 130068-27-8 (Interleukin-10) RN - 187348-17-0 (Interleukin-12) SB - IM MH - Animals MH - Cell Count MH - Gene Expression Regulation, Viral MH - In Situ Hybridization MH - Interleukin-10/genetics/*metabolism MH - Interleukin-12/genetics/*metabolism MH - Lung/*metabolism/pathology/virology MH - Lung Diseases, Interstitial/metabolism/pathology/virology MH - Porcine Reproductive and Respiratory Syndrome/*metabolism/pathology/transmission MH - Porcine respiratory and reproductive syndrome virus/genetics/*physiology MH - RNA, Messenger/metabolism MH - RNA, Viral/analysis MH - Reverse Transcriptase Polymerase Chain Reaction MH - Swine EDAT- 2003/08/19 05:00 MHDA- 2004/04/28 05:00 CRDT- 2003/08/19 05:00 PHST- 2003/08/19 05:00 [pubmed] PHST- 2004/04/28 05:00 [medline] PHST- 2003/08/19 05:00 [entrez] AID - S0021997503000367 [pii] AID - 10.1016/s0021-9975(03)00036-7 [doi] PST - ppublish SO - J Comp Pathol. 2003 Aug-Oct;129(2-3):205-12. doi: 10.1016/s0021-9975(03)00036-7.