毒理性
鉴定和使用:黄连素是一种在中国黄连中发现的细胞毒性生物碱,与黄连碱相关。它用于生化研究,并已被测试为实验性治疗。人类暴露和毒性:对黄连素进行了细胞毒性的评估,对象是一组人类和小鼠细胞系,与已建立的抗肿瘤药物米托蒽醌、多柔比星(Dx)和顺铂(CDDP)进行比较。黄连素对LoVo和HT-29具有细胞毒性,对L-1210的效力较低,而在对Dx耐药的人类肿瘤结肠细胞系LoVo/Dx上部分交叉耐药,而在对CDDP耐药的小鼠白血病细胞系L-1210/CDDP上则没有显著的交叉耐药性。黄连素在较低浓度下可选择性地预防血管平滑肌细胞的增殖,与其他各种细胞或结构相关的生物碱相比。黄连素具有降低胆固醇的潜在药理活性,可能通过调节参与胆固醇代谢的关键基因的mRNA和蛋白表达来降低胆固醇,如LDLR、CYP7A1和HMGCR。动物研究:黄连素是A型单胺氧化酶的一种强效可逆抑制剂。黄连素抑制血管平滑肌细胞的增殖。在亚慢性毒性研究中,没有观察到可能与黄连素治疗相关的死亡和疾病。此外,在口服黄连素后,任何动物的临床症状、体重、器官重量、尿检、血液学参数、大体解剖和病理学都没有异常。
IDENTIFICATION AND USE: Coptisine, a cytotoxic alkaloid found in Chinese goldthread, is related to berberine. It is used in biochemical studies and has been tested as experimental therapy. HUMAN EXPOSURE AND TOXICITY: Cytotoxicity evaluation of coptisine was conducted on a panel of human and murine cell lines in comparison with the established antitumor drugs mitoxantrone, doxorubicin (Dx), and cisplatin (CDDP). Coptisine was cytotoxic on LoVo and HT-29 and less potent on L-1210, and it was partially crossresistant on the human tumor colon cell line resistant to Dx, LoVo/Dx, whereas it was not significantly crossresistant on the murine leukemia cell line resistant to CDDP, L-1210/CDDP. Coptisine prevents vascular smooth muscle cell proliferation selectively at lower concentrations compared with various cells or other structurally related alkaloids. Coptisine has potential pharmacological activity for reducing cholesterol, and may reduce cholesterol by regulating mRNA and protein expressions of key genes involved in cholesterol metabolism, such as LDLR, CYP7A1, and HMGCR. ANIMAL STUDIES: Coptisine is a potent reversible inhibitor of type A monoamine oxidase. Coptisine inhibits proliferation of vascular smooth muscle cells. In the sub-chronic toxicity study, no mortality and morbidity were observed which could be related to coptisine treatment. Besides, there was no abnormality in clinical signs, body weights, organ weights, urinalysis, hematological parameters, gross necropsy, and histopathology in any of the animals after the oral administration of coptisine.
来源:Hazardous Substances Data Bank (HSDB)