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Sood, Neeraj; Chaudhary, Dharmendra K.; Singh, Akhilesh; Rathore, Gaurav
Gene, 12/2012, Letnik: 511, Številka: 2Journal Article
Serum immunoglobulins of Clarias batrachus (Cb-Ig) were purified by affinity chromatography using bovine serum albumin as capture ligand. Under reducing conditions in SDS-PAGE, Cb-Ig was composed of a heavy (H) chain (68.7kDa) and two light (L) chains (27.4 and 26.3kDa). Purified Cb-Ig was used to produce a monoclonal antibody (MAb) designated E4 MAb that belonged to IgG1 subclass. In Western blotting, this MAb showed binding to H chain of purified Cb-Ig and putative H chains in reduced sera of C. batrachus, Clarias gariepinus and Heteropneustes fossilis. However, no binding was observed with serum protein of Labeo rohita and Channa striata. Cross-reactivity of anti-Cb-Ig MAb was observed with serum of C. batrachus, C. gariepinus and H. fossilis in competitive ELISA. In immunoblotting of non-reduced Cb-Ig with E4 MAb, four bands assumed to be tetrameric, trimeric, dimeric and monomeric form were observed. In flow cytometric analysis of the gated lymphocytes, the number of surface Ig-positive (Ig+) cells in blood, spleen, kidney and thymus of C. batrachus was determined to be 50.1±3.1, 55.1±3.36, 42.4±4.81 and 5.1±0.89%, respectively, using E4 MAb. Ig+ cells were also demonstrated in formalin-fixed paraffin embedded tissue sections of spleen, kidney, thymus and smears of blood mononuclear cells in indirect immunoperoxidase test. The developed MAb was employed to detect pathogen-specific immunoglobulins in the sera of C. batrachus immunized with killed Edwardsiella tarda, by an indirect ELISA. This monoclonal antibody can be useful tool in immunological research and assays. ► Serum immunoglobulins of Clarias batrachus were purified by affinity chromatography. ► A monoclonal antibody (E4 MAb) was produced against purified Ig of C. batrachus. ► E4 MAb showed binding to heavy chain of purified Ig in Western blotting. ► The MAb was used to quantify and demonstrate Ig+ cells in blood and lymphoid organs. ► This MAb could detect pathogen-specific immunoglobulins in serum of immunized fish.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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