毒理性
许多呋喃香豆素的作用机制是基于它们能够与DNA和其他细胞组分如RNA、蛋白质以及膜中存在的几种蛋白质(如磷脂酶A2和C、钙依赖性和cAMP依赖性蛋白激酶以及表皮生长因子)形成光加合物。呋喃香豆素插入DNA的碱基对之间,并在紫外线A照射后给出环加合物。Phellopterin还是昆虫细胞色素P 450的抑制剂。它强烈抑制[3H]地西泮与中枢神经系统苯二氮卓受体的结合。
The mechanism of action many furocoumarins is based on their ability to form photoadducts with DNA and other cellular components such as RNA, proteins, and several proteins found in the membrane such as phospholipases A2 and C, Ca-dependent and cAMPdependent protein-kinase and epidermal growth factor. Furocoumarins intercalate between base pairs of DNA and after ultraviolet-A irradiation, giving cycloadducts. Phellopterinis also an inhibitor of insect cytochromes P 450. It strongly inhibits the binding of [3H]diazepam to central nervous system benzodiazepine receptors in vitro. (L579)
来源:Toxin and Toxin Target Database (T3DB)