Abstract:
:Modulation of CYP3A1 and CYP3A2 mRNA expression by dexamethasone and by phenobarbital has been studied in immature (21-day-old) and adult (90-day-old) rat liver. Positive modulation of these forms by both agents markedly declines with the age of the animals. However, CYP3A2 mRNA, although physiologically extinguished in the adult females, still responds to dexamethasone stimulation. The regulatory mechanisms underlying the differential behavior of CYP3A1 in the immature and adult animals have been further investigated by analyzing the early changes in the run-on transcription rates and the subsequent mRNA accumulation in the liver in response to the inducer agents. CYP3A genomic clones were constructed and characterized for this purpose. The use of a unique cosCYP/3A1 intronic sequence, identified in this work, made possible the selective determination of the transcription rate of this gene by run-on assay, as a function of ontological development and inducer treatment. Parallel determination of the mRNA concentration in the liver by dot blot analysis demonstrated that dexamethasone induces CYP3A1 essentially through transcription regulation in immature animals, while in adults it is suggested to act mainly at a post-transcriptional level.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Telhada MB,Pereira TM,Lechner MCdoi
10.1016/0003-9861(92)90471-8subject
Has Abstractpub_date
1992-11-01 00:00:00pages
715-25issue
2eissn
0003-9861issn
1096-0384pii
0003-9861(92)90471-8journal_volume
298pub_type
杂志文章abstract::Prothymosin alpha, a polypeptide of 109 to 111 amino acid residues, contains the entire thymosin alpha 1 sequence (residues 1-28) at its amino terminal. Human peripheral blood monocytes incubated with prothymosin alpha release thymosin alpha 1 in the culture supernatants. In addition total RNA is found to increase. Th...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90570-m
更新日期:1992-07-01 00:00:00
abstract::USP17 is a deubiquitinating enzyme that is upregulated in numerous cancers and therefore a drug target. We developed a robust expression, purification, and assay system for USP17 enabling its enzymatic and structural characterization. USP17 was expressed in E. coli as inclusion bodies and then solubilized, refolded, a...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2016.10.008
更新日期:2016-12-15 00:00:00
abstract::An acid phosphatase from Brassica nigra (black mustard) leaf petiole cell-suspension cultures has been purified 1633-fold to a final specific activity of 1225 (mumols orthophosphate produced/min)/mg protein and near homogeneity. The native protein was a glycosylated monomer having a molecular mass of 60 kDa and a pI o...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90033-f
更新日期:1991-04-01 00:00:00
abstract::In the biosynthetic conversion of glutamate to the tetrapyrrole precursor, delta-aminolevulinic acid (ALA), glutamate is activated at C-1 by glutamyl-tRNA synthetase-catalyzed ligation to tRNAGlu. Glutamyl-tRNA reductase next catalyzes reduction of the activated glutamate to glutamate-1-semialdehyde (GSA), which is th...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1300
更新日期:1994-07-01 00:00:00
abstract::This study systematically examined the characteristics of specific binding of adult diferric transferrin to its receptor using a Triton X-100 solubilized preparation from human placentas as the receptor source. The following information was obtained. The ionic strength for maximal binding is in the range of 0.1-0.3 M ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90005-x
更新日期:1983-08-01 00:00:00
abstract::Experimental autoimmune encephalomyelitis (EAE) is a commonly used mouse model of multiple sclerosis, a chronic inflammatory disease of the central nervous system (CNS) characterized by demyelination leading to brain and spinal cord malfunctions. We postulate that not only biological but also biomechanical properties ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2019.108221
更新日期:2020-02-15 00:00:00
abstract::Recently, we synthesized and characterized vanadyl saccharides to evaluate the effects of various vanadate and vanadyl complexes, which differ in their oxidation states on various biomacromolecules and cellular activities (1, 2). Here, we report that both vanadate (+V oxidation state) and different vanadyl species (+I...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1997.0394
更新日期:1998-01-01 00:00:00
abstract::The in vivo turnover of several rat liver microsomal proteins was studied using techniques designed to maximize antibody recognition specificity and minimize reutilization of radioactive labels. The kinetics of degradation of seven cytochrome P-450 isozymes, NADPH-cytochrome P-450 reductase, and epoxide hydrolase were...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(84)90257-1
更新日期:1984-11-15 00:00:00
abstract::Thromboxane A2 synthase (TXAS) binds to the endoplasmic reticulum membrane and catalyzes both an isomerization of prostaglandin H2 (PGH2) to form thromboxane A2 (TXA2) and a fragmentation of PGH2 to form 12-hydroxy-5,8,10-heptadecatrienoic acid (HHT) and malondialdehyde (MDA). TXAS is a non-classic cytochrome P450 in ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(03)00287-x
更新日期:2003-08-01 00:00:00
abstract::Dark incubation of envelope vesicles derived from a strain of Halobacterium halobium that lacks bacteriorhodopsin but contains halorhodopsin and a third rhodopsin-like pigment caused a decrease in the flash yield [the amplitude of a transient absorbance change of flash reactive component(s) by flash] of halorhodopsin ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(85)90144-4
更新日期:1985-04-01 00:00:00
abstract::The enzyme ketol acid reductoisomerase catalyzes the second common reaction in the biosynthesis of the branched chain amino acids. The reaction is complex as an alkyl migration and a ketone reduction apparently occur as separate steps during the conversion of acetolactate to 2,3-dihydroxy-3-methylbutyrate. This paper ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90710-e
更新日期:1992-05-01 00:00:00
abstract::Methylibium petroleiphilum strain PM1 uses various petroleum products including the fuel additive methyl tert-butyl ether and straight chain and aromatic hydrocarbons as sole carbon and energy sources. It has two operons, dmpI and dmpII, that code for the enzymes in a pair of parallel meta-fission pathways. In order t...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2013.06.016
更新日期:2013-09-01 00:00:00
abstract::The cytochrome P-450-dependent cholesterol side chain cleavage system of the brain has been studied using nonsynaptic mitochondria as the source of enzymatic activity. The system has been found to bind cholesterol and 11-deoxycorticosterone, producing type I difference spectra, whereas the binding of pregnenolone indu...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90142-1
更新日期:1987-05-01 00:00:00
abstract::The polymerization of scallop beta-like actin is significantly slower than that of skeletal muscle alpha-actin. To reveal which steps of polymerization contribute to this difference, we estimated the efficiency of nucleation of the two actins, the rates of filament elongation at spontaneous and gelsolin-nucleated poly...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2008.06.016
更新日期:2008-09-15 00:00:00
abstract::Protoporphyrinogen oxidase (EC 1.3.3.4) is the penultimate enzyme in the heme biosynthetic pathway, catalyzing the six-electron oxidation of protoporphyrinogen to protoporphyrin. A dominantly inherited genetic deficiency in this enzyme results in the disease variegate porphyria. We now report the cloning, sequence, an...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1995.0051
更新日期:1995-12-20 00:00:00
abstract::Mitochondrial metabolism depends on movement of hydrophilic metabolites through the mitochondrial outer membrane via the voltage-dependent anion channel (VDAC). Here we assessed VDAC permeability of intracellular mitochondria in cultured hepatocytes after plasma membrane permeabilization with 8 microM digitonin. Block...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2008.10.036
更新日期:2009-01-15 00:00:00
abstract::We explored furin substrate requirements in addition to the motif R-X-K/R-R using synthetic fluorescent resonance energy transfer (FRET) decapeptides. These decapeptides were derived from furin cleavage sites in viral coat glycoproteins and human and bacterial protein precursors. The hydrolysis by furin of most substr...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2009.05.013
更新日期:2009-07-15 00:00:00
abstract::Subcutaneous implantation of demineralized bone matrix in rats induces migration of host cells into the site and results in the sequential development of cartilage and bone. The biosynthesis and metabolic fate of proteoglycans in the plaques at the bone matrix implantation site were investigated by [35S]sulfate labeli...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90551-5
更新日期:1986-05-15 00:00:00
abstract::The inhibitory effects of steroid hormones, including glucocorticoids such as cortisol, and related compounds on dopamine formation from p-tyramine, catalyzed by cytochrome P450 (CYP) 2D6.2 (Arg296Cys, Ser486Thr) and CYP2D6.10 (Pro34Ser, Ser486Thr) were compared with the effects of those catalyzed by CYP2D6.1 (wild ty...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2017.03.009
更新日期:2017-04-15 00:00:00
abstract::This investigation presents disturbances of the mitochondrial metabolism by arsenite, a hydrophilic dithiol reagent known as an inhibitor of mitochondrial alpha-keto acid dehydrogenases. Arsenite at concentrations of 0.1-1.0 mM was shown to induce a considerable oxidation of intramitochondrial NADPH, NADH, and glutath...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90659-m
更新日期:1990-12-01 00:00:00
abstract::Maitotoxin (MTX) is a highly potent marine toxin that activates both voltage-sensitive and receptor-operated calcium channels in the plasma membrane. This results in calcium overload that rapidly leads to cell death. We now report that maitotoxin (0.1-1 nM) induces calpain activation in both SH-SY5Y neuroblastoma cell...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0300
更新日期:1996-07-15 00:00:00
abstract::Vanadium salts such as vanadyl sulfate (VS), potent inhibitors of protein tyrosine phosphatases, have been shown to mimic, augment, and prolong insulin's action. However, the molecular mechanism of responses to these salts is not clear. In the present studies, we examined if VS-induced effects on insulin action are as...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2003.09.010
更新日期:2003-12-01 00:00:00
abstract::The cDNA probe H-9, originally constructed to recognize a portion of the mRNA for lapine synovial collagenase, also hybridized with a RNA of the same size (approximately 2.0 kb) isolated from activated lapine articular chondrocytes. Primary, monolayer cultures of lapine articular chondrocytes did not contain detectabl...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90605-4
更新日期:1988-07-01 00:00:00
abstract::The delta pH in ionophore-treated cells of an acidophile has been determined by electron spin resonance spectroscopy. The values obtained were comparable to those obtained using the more conventional techniques involving radiolabeled probes. No binding of the spin-labeled probe was observed as determined by two indepe...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(89)90180-x
更新日期:1989-08-15 00:00:00
abstract::Myosin prepared from tilapia (Serotherodon aureus) was complexed with 8-anilino-1-naphthalene sulfonate (ANS) and continuously heated at 1 degree C/min. A large increase in fluorescence was observed with a transition temperature of 34 degrees C. The effect of several salts on the transition temperature was tested. A p...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90277-9
更新日期:1988-11-01 00:00:00
abstract::Polyunsaturated fatty acids (PUFAs) are reported to exert beneficial effects in Alzheimer's disease. Some PUFAs are known to reduce amyloid-beta (Aβ) toxicity by promoting its degradation and clearance. Studies on the direct interactions of PUFAs with Aβ peptides are limited and contradictory. In this study, we report...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2018.12.027
更新日期:2019-03-15 00:00:00
abstract::Under certain circumstances, added antioxidants can protect tissues against reoxygenation injury after ischemia. Yet reperfusing blood carries many antioxidants with it. The implications of this "antioxidant paradox" are discussed. ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/0003-9861(90)90635-c
更新日期:1990-12-01 00:00:00
abstract::Hemorrhagic toxin f (HT-f) was isolated from Crotalus atrox (Western Diamondback Rattlesnake) venom by a five-step purification procedure. Homogeneity was established by the formation of a single band in acrylamide gel electrophoresis, isoelectric focusing, and sodium dodecyl sulfate (SDS)-electrophoresis. HT-f has a ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(84)90393-x
更新日期:1984-06-01 00:00:00
abstract::A variety of experimental conditions elicit increases in mitochondrial permeability that can be differentiated from the classic cyclosporin A (CsA)-sensitive mitochondrial permeability transition (MPT). For example, butylated hydroxytoluene, signal peptides, and the hormone thyroxine have been shown to promote increas...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.2000.2195
更新日期:2001-02-01 00:00:00
abstract::The regulation of the plasma membrane Ca2+ pump by hormones via phosphorylation in intact cells has not been clearly established. We now present evidence that the Ca2+ pump is phosphorylated on both serine and threonine residues in unstimulated and stimulated cultured rat aortic endothelial cells. Among the stimuli te...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90448-r
更新日期:1991-08-15 00:00:00