由胸腺产生的胸腺素对T淋巴细胞的发育、分化、成熟起着十分重要的作用,在一些实验模型中可以代替胸腺而重建免疫功能。已有实验证明,荷瘤小鼠的胸腺可发生急性萎缩,其萎缩程度与肿瘤生长的速度呈正相关。胸腺素能减轻瘤鼠胸腺萎缩的程度,增强机体的免疫力,从而达到抑瘤作用。由于胸腺素没有种的特异性,因此,在临床上对于治疗一些免疫病有较高的应用价值。关于市售的从猪或牛胸腺中提制的胸腺素在临床应用后,对人体会不会产生毒性,是否 Thymosin produced by the thymus plays a very important role in the development, differentiation and maturation of T lymphocytes. In some experimental models, thymosin can be used instead of the thymus to reconstruct the immune function. Experiments have shown that the thymus tumor-bearing mice may occur acute atrophy, the degree of atrophy and tumor growth was positively correlated. Thymosin can reduce the extent of thymus atrophy in tumor-bearing mice, enhance the body’s immunity, so as to achieve tumor suppression. Because of the lack of species-specific thymosin, therefore, in the clinical treatment of some immune diseases have a higher value. Regarding the commercial use of thymosin prepared from pigs or bovine thymus, does it cause toxicity to the human body after clinical application, is it