Modulation of drug-induced cytotoxicity by a bispecific monoclonal antibody that recognizes the epidermal growth factor receptor and doxorubicin

A hybrid hybridoma secreting a bispecific hybrid mAb (bsmAb), which recognizes both the epidermal growth factor receptor (EGF-R) and the drug doxorubicin, was produced by somatic hybridization of two hybridomas. The bsmAb obtained was able to retarget doxorubicin cytotoxicity in vitro specifically on EGF-R-positive cells exerting at the same time an antidotal effect on cells that did not overexpress the EGF-R. Distribution studies in mice indicate that the bsmAb selectively delivers the drug to tumour cells and modifies doxorubicin biodistribution with a statistically significant decrease of drug concentration in the intestine, which is the main target of early anthracycline toxicity. In keeping with this finding is the remarkable antidotal activity exerted by bsmAb in mice treated with doxorubiein, which is proved by retardation in loss of body weight and mortality. The effectiveness on tumour growth of the mAb followed by the administration of doxorubicin appears to be equal to that of the drug alone; however, the bsmAb exerts a remarkable antidotal activity.     

半导体激光血管内照射对人体外周血T淋巴细胞亚群及NK细胞的调节作用

本文报道了半导体激光血管内照射对人体外周血Ｔ淋巴细胞亚群及ＮＫ细胞的免疫调节作用。实验结果提示：在２３例经６５０ｎｍ．５ｍＷ的半导体激光血管内照射治疗一次,五次和十次的患者中,ＣＤ＋３细胞亚群的百分比与照射前（６３．６６％）比较,分别提高到６５．８６％,６９．９４％,７５．０４％。ＣＤ＋４Ｔ辅助细胞在第十次治疗后也有所增加。除此之外,半导体激光血管内照射对ＮＫ细胞比例及ＣＤ＋４／ＣＤ＋８比值具有双向调控作用,即偏离（即高于或低于）正常值的患者经照射后恢复到正常水平。这种双向调控作用将对临床治疗更有指导意义。