title: Cytokine mRNA expression in leukocytes of efferent lymph from stimulated lymph nodes in pigs.
abstract: To test the hypothesis that characteristic cytokine responses occur in stimulated porcine lymph nodes (LNs), lymph node efferent ducts were surgically cannulated. Efferent lymph (EL) leukocytes were collected before and after stimulation of LNs with mitogens [bacterial lipopolysaccharide (LPS) or phytohemagglutinin-P(PHA-P)] and antigens [hen egg white lysozyme (HEWL) or purified protein derivative of tuberculin (PPD)]. Cytokine mRNA expression was evaluated by quantitative reverse transcription polymerase chain reaction (Q-RT-PCR). Interleukin (IL)-1alpha was predominantly produced after all stimuli except for HEWL after which tumour necrosis factor (TNF)-alpha message was dominant. None of the stimuli induced message for IL-2, IL-4 or IL-8. Other cytokine mRNAs were produced in variable amounts and percentage of overall production of each cytokine message was in the following descending rank: LPS: IL-1alpha, TNF-alpha, interferon (IFN)-gamma, IL-10, IL-12-p35, IL-6, IL-12-p40 and TNF-beta; PHA-P: IL-1alpha, TNF-alpha, IL-10, IFN-gamma, IL-12-p40 and TNF-beta; HEWL: TNF-alpha, IL-1alpha, IFN-gamma, IL-10, IL-6, IL-12-p40, TNF-beta and IL-12-p35 and PPD: IL-1alpha, IFN-gamma, TNF-alpha and IL-10. Time course response of cytokines revealed early (IL-1alpha, 10, TNF-alpha) and intermediate (IL-12-p40, TNF-beta, IFN-gamma) responses for PHA-P and early (IL-1alpha, 6, 10, IL-12-p35, IL-12-p40, TNF-alpha), intermediate (TNF-beta, IFN-gamma) and late (IL-1alpha, 6) for LPS. Cytokine mRNA response induced by HEWL was early (IL-alpha, IFN-gamma), intermediate (IL-10, IL-12-p40, TNF-beta), late (IL-1alpha, IL-12-p35) and very late (IL-1alpha, 6, 10, IL-12-p40, TNF-alpha). In Bacillus Calmette-Guérin (BCG) sensitized pigs, stimulation of LNs with PPD induced message for IL-1alpha, 10, TNF-alpha and IFN-gamma which peaked at 24h. Cytokine mRNAs varied by stimulus and differed for antibody and cell-mediated immune response.
authors.affiliation: Department of Pathobiology, University of Guelph, Guelph, Canada.
authors.forename: N R
authors.initials: NR
authors.lastname: Reddy
authors.forename: P
authors.initials: P
authors.lastname: Borgs
authors.forename: B N
authors.initials: BN
authors.lastname: Wilkie
mesh_terms: D000818:Animals; D016207:Cytokines / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D018076:DNA, Complementary / Q000737:chemistry; D004587:Electrophoresis, Agar Gel / Q000662:veterinary; D005260:Female; D005786:Gene Expression Regulation; D007375:Interleukin-1 / Q000276:immunology / Q000378:metabolism; D007962:Leukocytes / Q000276:immunology*; D008070:Lipopolysaccharides / Q000276:immunology; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D008297:Male; D009113:Muramidase / Q000276:immunology; D009163:Mycobacterium bovis / Q000276:immunology; D010835:Phytohemagglutinins / Q000276:immunology; D012333:RNA, Messenger / Q000737:chemistry / Q000302:isolation & purification; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D013047:Specific Pathogen-Free Organisms; D013552:Swine / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology / Q000378:metabolism
chemical_list: D016207:Cytokines; D018076:DNA, Complementary; D007375:Interleukin-1; D008070:Lipopolysaccharides; D010835:Phytohemagglutinins; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; C028784:phytohemagglutinin-P; D009113:Muramidase