Once these processes have been triggered programmed cell death can occur unless repaired by cellular mechanisms [2,5].
In humans, it is known that psoralens can behave as a general competitor substrate or act as a suicide inhibitor reacting with the heme group of the P450 proteins and therefore inactivating them. For instance, the 8-methoxypsoralen (xanthotoxin), 5-methoxypsoralen (Bergapten) and psoralen have been reported to act as suicide inac- tivators of human-CYS2A6 protein in liver microsomes [6]. In addi- tion, bergapten is a suicide inhibitor of human CYP3A4, and xanthotoxin competitively inhibits a variety of drug metabolites catalyzed by CYP3A4 [7]. All the above mentioned compounds are currently used as pharmaceuticals in the treatment of psoriasis [8,9], vitiligo [10], and T cell lymphoma [11].
Once these processes have been triggered programmed cell death can occur unless repaired by cellular mechanisms [2,5].In humans, it is known that psoralens can behave as a general competitor substrate or act as a suicide inhibitor reacting with the heme group of the P450 proteins and therefore inactivating them. For instance, the 8-methoxypsoralen (xanthotoxin), 5-methoxypsoralen (Bergapten) and psoralen have been reported to act as suicide inac- tivators of human-CYS2A6 protein in liver microsomes [6]. In addi- tion, bergapten is a suicide inhibitor of human CYP3A4, and xanthotoxin competitively inhibits a variety of drug metabolites catalyzed by CYP3A4 [7]. All the above mentioned compounds are currently used as pharmaceuticals in the treatment of psoriasis [8,9], vitiligo [10], and T cell lymphoma [11].
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