Abstract:
:The Cytochrome P450 4A subfamily is one of eighteen subfamilies in the CYP4 family and presently consists of twenty individual forms in nine different mammalian species. The major substrates for CYP4A forms are fatty acids, but recent studies have shown other non-fatty acid substrates may be metabolized by specific CYP4A forms. The physiological and metabolic functions of the CYP4A subfamily have not been elucidated, but the ability of CYP4A forms to metabolize medium and long chain length fatty acids at their omega (omega)-carbon atom has generated significant interest because of the possible role that omega-hydroxylated fatty acids may have in cell signalling processes and as an alternative pathway for fatty acid metabolism. A number of different compounds or physiological conditions have been shown to regulate the expression of CYP4A forms in liver and/or kidney. Several CYP4A forms may serve as a marker for the exposure to compounds that are classified as peroxisome proliferators. There is also considerable interest why multiple CYP4A forms exist in different tissues. Recent studies in the rat and human indicate that other CYP4 forms besides CYP4A forms may be responsible for the metabolism of arachidonic acid to its omega-hydroxy product. The focus of this review will be to summarize recent studies that have characterized the substrate specificity of rat, rabbit and human CYP4A forms and discuss the significance of CYP4A-mediated hydroxylation of fatty acids. In addition, dietary effects or novel compounds that have been reported to regulate CYP4A expression in the rat and mouse will be discussed.
journal_name
Curr Drug Metabjournal_title
Current drug metabolismauthors
Okita RT,Okita JRdoi
10.2174/1389200013338423keywords:
subject
Has Abstractpub_date
2001-09-01 00:00:00pages
265-81issue
3eissn
1389-2002issn
1875-5453journal_volume
2pub_type
杂志文章,评审abstract::Bioavailability of orally administered drugs can be influenced by a number of factors including release from the formulation, dissolution, stability in the gastrointestinal (GI) environment, permeability through the gut wall and first-pass gut wall and hepatic metabolism. Although there are various enzymes in the gut ...
journal_title:Current drug metabolism
pub_type: 杂志文章
doi:10.2174/138920010794328913
更新日期:2010-11-01 00:00:00
abstract::The assessment of in vitro inhibition and induction of the cytochrome P450 enzymes of the liver is a critical part of the drug discovery and development process in order to ensure that two or more drugs can be safely coadministered without alterations in exposure. Early assessment of potential candidates using high th...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/138920008786485128
更新日期:2008-11-01 00:00:00
abstract::Accompanying with hot discussions on developing multi-target drugs for the therapy of multi-gene diseases, herbal medicines are receiving more and more attention worldwide in both academic and industrial fields. Pharmacokinetic and metabolic research is one of the important issues for intensive understanding of therap...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/138920012803341285
更新日期:2012-11-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/1389200214666131211160005
更新日期:2014-01-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/138920008786485092
更新日期:2008-11-01 00:00:00
abstract::This review focuses primarily on the mammalian medium and long-chain fatty acid coenzyme A ligases that have been implicated in the metabolism of xenobiotic carboxylic acids such as pesticides, arylpropionate non steroidal anti-inflammatory drugs and the hypolipidaemic clofibrate and its congeners. Evidence of multipl...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/1389200003339261
更新日期:2000-07-01 00:00:00
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journal_title:Current drug metabolism
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更新日期:2009-03-01 00:00:00
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journal_title:Current drug metabolism
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更新日期:2003-04-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:Acute Kidney Injury (AKI) is a sudden decrease in kidney function. In the early period, the highest percentage of AKI occurs among newborns hospitalized in the neonatal intensive care units, especially premature neonates. The prognosis of AKI depends on the type and severity of the cause of an injury, the ac...
journal_title:Current drug metabolism
pub_type: 杂志文章
doi:10.2174/1389200220666190321142417
更新日期:2019-01-01 00:00:00
abstract::The transcription factor networks that regulate basal and xenobiotic-modulated expression of the hepatic sulfotransferases affect the dynamics of xenobiotic detoxication, carcinogen bioactivation and metabolic homeostasis. Emerging evidence suggests that liver-enriched transcription factors, the aryl hydrocarbon (Ah) ...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/1389200054633871
更新日期:2005-08-01 00:00:00
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pub_type: 临床试验,杂志文章
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更新日期:2007-06-01 00:00:00
abstract::Maternal antenatal therapy with glucocorticoids (GC) is routinely used to prevent lung immaturity. The potential harmful effects on other organs, including in particular the central nervous system (CNS), are still controversial. In the present review we aimed to investigate: i) the beneficial and detrimental effects o...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
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更新日期:2013-02-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/138920008783884696
更新日期:2008-03-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章
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更新日期:2016-06-15 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章,评审
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更新日期:2015-01-01 00:00:00
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pub_type: 杂志文章
doi:10.2174/1389200221999200918141239
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Neuropsychiatric diseases primarily characterized by dementia stand third in the global list of diseases causing disability. The poor water solubility, erratic oral absorption, low bioavailability, poor intestinal absorption, and the impeding action of the blood-brain barrier (BBB) are the major factors limi...
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更新日期:2020-01-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章
doi:10.2174/138920011798357015
更新日期:2011-10-01 00:00:00
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journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/138920010791636202
更新日期:2010-07-01 00:00:00
abstract::Brain, the centre of the nervous system and an integral part the body, is protected by two anatomical and physiological barriers- Blood-Brain Barrier (BBB) and Blood-Cerebrospinal Fluid Barrier (BCSFB). Blood-Brain Barrier is a very complex and highly organized multicellular structure that shields the brain from harmf...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
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更新日期:2017-01-01 00:00:00
abstract::Talin is an intracellular cytoskeletal protein and one of the major components of the focal adhesion complex. It mainly acts as an interlink between transmembrane integrin receptors and cytosolic F-actin. Apart from integrins and actin, it also interacts with various other proteins in the adhesion complex to regulate ...
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doi:10.2174/1389200221666200214114018
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:In the last few years, the use of modified Carbon Nanomaterials (CNMs) for theranostics (therapeutic and diagnosis) applications is a new and rapidly growing area in pharmacy and medical fields. Owing to this, their specific physicochemical behaviors like high stability, drug loading, surface area to volume ...
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pub_type: 杂志文章,评审
doi:10.2174/1389200219666180925094515
更新日期:2019-01-01 00:00:00
abstract::This review focuses on identification of the important active site residues of CYP2D6 in terms of CYP2D6 polymorphism. A meta-analysis was performed on the reported literature regarding (1) values of the Michaelis-Menten constant (K(m)), maximal velocity (V(max)), and intrinsic clearance (V(max)/K(m)) for 41 metabolic...
journal_title:Current drug metabolism
pub_type: 杂志文章,meta分析,评审
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更新日期:2011-06-01 00:00:00
abstract:BACKGROUND:Bioequivalence studies are a vital part of drug development. The average bioequivalence approach is the standard method of assessment to conclude whether the generic product is bioequivalent to the innovator product. Of late, debates are on whether the average bioequivalence approach adequately addresses dru...
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pub_type: 杂志文章,随机对照试验
doi:10.2174/1389200221666200401105119
更新日期:2020-01-01 00:00:00
abstract::Part I of this article published in the previous issue of Current Drug Metabolism discussed the substrate specificity, inhibitor selectivity and structure-activity relationship (SAR) of human CYP2C9. The features of CYP2C9 pharmacophore and SAR models have been elaborated. Part II of this article will address the homo...
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更新日期:2009-12-01 00:00:00
abstract:BACKGROUND:Nanoparticles (NPs) are being used extensively owing to their increased surface area, targeted delivery and enhanced retention. NPs have the potential to be used in many disease conditions. Despite widespread use, their toxicity and clinical safety still remain a major concern. OBJECTIVE:The purpose of this...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
doi:10.2174/1389200221666200103091753
更新日期:2019-01-01 00:00:00
abstract::The possibility to treat central nervous system (CNS) disorders is strongly limited by the poor access of many therapeutic agent to the target tissues. This is mainly due to the presence of the blood-brain barrier (BBB), formed by a complex interplay of endothelial cells, astrocyte and pericytes, through which only se...
journal_title:Current drug metabolism
pub_type: 杂志文章,评审
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更新日期:2012-01-01 00:00:00