当前位置： SCI文献检索 > DRUG METABOLISM REVIEWS期刊下所有文献 > Structure, function, regulation and polymorphism and the clinical significance of human cytochrome P450 1A2.

Structure, function, regulation and polymorphism and the clinical significance of human cytochrome P450 1A2.

Abstract：

:Human CYP1A2 is one of the major CYPs in human liver and metabolizes a number of clinical drugs (e.g., clozapine, tacrine, tizanidine, and theophylline; n > 110), a number of procarcinogens (e.g., benzo[a]pyrene and aromatic amines), and several important endogenous compounds (e.g., steroids). CYP1A2 is subject to reversible and/or irreversible inhibition by a number of drugs, natural substances, and other compounds. The CYP1A gene cluster has been mapped on to chromosome 15q24.1, with close link between CYP1A1 and 1A2 sharing a common 5'-flanking region. The human CYP1A2 gene spans almost 7.8 kb comprising seven exons and six introns and codes a 515-residue protein with a molecular mass of 58,294 Da. The recently resolved CYP1A2 structure has a relatively compact, planar active site cavity that is highly adapted for the size and shape of its substrates. The architecture of the active site of 1A2 is characterized by multiple residues on helices F and I that constitutes two parallel substrate binding platforms on either side of the cavity. A large interindividual variability in the expression and activity of CYP1A2 has been observed, which is largely caused by genetic, epigenetic and environmental factors (e.g., smoking). CYP1A2 is primarily regulated by the aromatic hydrocarbon receptor (AhR) and CYP1A2 is induced through AhR-mediated transactivation following ligand binding and nuclear translocation. Induction or inhibition of CYP1A2 may provide partial explanation for some clinical drug interactions. To date, more than 15 variant alleles and a series of subvariants of the CYP1A2 gene have been identified and some of them have been associated with altered drug clearance and response and disease susceptibility. Further studies are warranted to explore the clinical and toxicological significance of altered CYP1A2 expression and activity caused by genetic, epigenetic, and environmental factors.

journal_name

Drug Metab Rev

journal_title

Drug metabolism reviews

authors

Zhou SF,Wang B,Yang LP,Liu JP

doi

10.3109/03602530903286476

subject

Has Abstract

pub_date

2010-05-01 00:00:00

pages

268-354

issue

eissn

0360-2532

issn

1097-9883

journal_volume

pub_type

杂志文章,评审

在线工具

Structure, function, regulation and polymorphism and the clinical significance of human cytochrome P450 1A2.