胸腺素是动物胸腺组织所分泌的一种可溶性多肽类激素,具有促进T淋巴细胞的生成、成熟和分化为有活性的T细胞,以调节机体的免疫功能。本研究在胸腺素促进免疫细胞增殖,抑制肿瘤细胞生长的基础上,进一步探讨外源性胸腺素对Ehrlich Ascitic Carinoma(EAC)小鼠免疫细胞(骨髓和胸腺淋巴细胞)及癌细胞有丝分裂指数(Mitotic Index;MI)的影响。小鼠荷瘤后,免疫器官的功能减退,胸腺发生急性萎缩,骨髓的造血功能降低,结 Thymosin is a kind of soluble polypeptide hormone secreted by animal thymus tissue. It can promote the generation, maturation and differentiation of T lymphocytes into active T cells to regulate the body’s immune function. In this study, thymosin promoted the proliferation of immune cells and inhibited the growth of tumor cells, and further explored the mitogenic index of immune cells (bone marrow and thymus lymphocytes) and cancer cells of Ehrlich Ascitic Carinoma (EAC) mice using exogenous thymosin (Mitotic). Index; MI) effect. After the mice were infected with the tumor, the immune organs functioned, the thymus gland shrank acutely, and the hematopoietic function of the bone marrow decreased.