In an objective to generate effective carcinoembryonic antigen (CEA) specific anti-tumor immune response in Swiss mice, CEA was presented using macrophages with adjuvant help from neem leaf glycoprotein (NLGP). Such vaccination generates significantly higher antibody (IgG2a) and T cell response than immunization protocol without NLGP. NLGP controls the function of both B cells and macrophages by altering the expressions of various regulatory molecules, like, CD19, CD11b, etc. NLGP also directs carcinoembryonic antigen (CEA) vaccination towards Th1 bias, by modulating cytokine secretion. This NLGP-generated anti-CEA immune response would be effective as a vaccine to lyse CEA+ tumors in vitro and in vivo.
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