Abstract
Monocyte derived macrophages (MDMs), as an in vitro model in pathogen challenge studies, are generally induced with lipopolysaccharide (LPS) and concanavalin A (ConA) to assay cellular immunity. General immune responses to LPS and ConA have been studied in a wide range of species, but similar studies are limited to goats. In the present study, caprine MDMs were induced with LPS and ConA and the expression profile of immune response (IR) genes, namely, Tumor Necrosis Factor Alpha (TNFA), Interferon Gamma (IFNG), Interleukin 2 (IL2), Granulocyte Macrophage Colony Stimulating Factor (GMCSF), Interleukin 10 (IL10), Transforming Growth Factor Beta (TGFB), Natural Resistance-Associated Macrophage Protein-1 (NRAMP1), inducible nitric oxide synthase (NOS2), and caspase1 (CASP1) were studied to compare the potential of LPS and ConA in initiating immune responses in goat macrophages. Real Time quantitative PCR (RT-qPCR) analysis revealed that both LPS and ConA caused an upregulation (p < 0.05) of GMCSF, TGFB1, IL10, and IFNG and down-regulation of NRAMP1. TNFA and IL2, and NOS2 were upregulated (p < 0.05) by ConA and LPS, respectively. Whereas, the expression of CASP1 remain unaltered. Comparatively, the effect of ConA was more pronounced (p < 0.05) in regulating the expression of IR genes suggesting its suitability for studying the general immune responses in caprine MDM.
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