ABSTRACT
In this study, we investigate the immunostimulatory effects of alcoholic extract of the coffee seed on cell-mediated immune response and cyclophosphamide-induced [CP] immunosuppressed mice. The assessment of cellular immune function was carried out by the measurement of delayed-type hypersensitivity [DTH] response. According to the literature survey, cyclophosphamide has only suppressing effect on the lymphoid organ, white blood cell [WBC] and other parts of humoral immunity. Humoral immunity was assessed by the hemagglutination antibody titre. Mice were treated with three doses of extract [50, 150 and 250 mg/Kg body weight per os]. Relative organ weight and WBC counts were also studied in these animals. At doses of 50 and 150, a significant increase [p < 0.05] in relative organ weight of spleen and thymus was observed but there was no effect on kidney and liver weights. WBC counts was also increased significantly [p < 0.001] in all doses of the plant extract. Coffea arabica extract elicited a significant [p < 0.001] increase in the DTH response at doses of 50 and 150 mg/Kg, but the change at higher dose of 250 mg/Kg was not statistically significant. In the HT test, plant extract also showed modulatory effect at all doses groups. Over all, coffee seed showed the stimulatory effect on cellular immune function and cyclophosphamide induced immunosuppression in mice