Progresses on Antitumor Immune Mechanisms of Protozoon
A variety of protozoons (Amoeba,Trypanosoma cruz i,Eimeria,Plasmodium falciparum and Toxoplasma gondii,etc.) can activate and regulate the human immune system,change tumor-induced immunosuppression,and enhance the anti-tumor immune response.This paper reviews the effects of protozoon on cellular and humoral immunity,the tumor microenvironment in tumor-bearing organisms,and reveals the antitumor immune mechanisms of protozoon.