Abstract:
:Duchenne muscular dystrophy (DMD) is caused by dystrophin deficiency, which results in muscle necrosis and the upregulation of heat shock/stress proteins (HSP). We hypothesized that reactive oxygen species, and in particular hydroxyl radicals (.OH), participate in muscle necrosis and HSP expression. It was assumed that iron deprivation decreases .OH generation, restraining the disease process and reducing the oxidant-induced expression of HSP. The role of iron-catalyzed free radical reactions in the pathology of dystrophin-deficient muscle was evaluated in the murine model for Duchenne muscular dystrophy (mdx), by examining the effects of dietary deficiency and supplementation of iron on serum creatine kinase (CK), muscle morphology, lipid peroxidation and HSP levels in mice maintained on diets deficient in or supplemented with iron for 6 weeks. Iron-deprived mdx mice showed a significant decrease in the number of macrophage-invaded necrotic fibers and the expression of the 70-kDa heat shock protein (Hsp70). This suggests that the iron-dependent generation of .OH relates to muscle necrosis in the mdx mouse and modulates the expression of Hsp70 in vivo. In contrast, iron deprivation had no influence on other HSP or on lipid peroxidation in mdx mice, while maintenance on either diet caused a significant decrease in serum creatine kinase activity. The potential therapeutic effects of iron deprivation in mdx should be considered.
journal_name
Biochem Pharmacoljournal_title
Biochemical pharmacologyauthors
Bornman L,Rossouw H,Gericke GS,Polla BSdoi
10.1016/s0006-2952(98)00055-0subject
Has Abstractpub_date
1998-09-15 00:00:00pages
751-7issue
6eissn
0006-2952issn
1873-2968pii
S0006-2952(98)00055-0journal_volume
56pub_type
杂志文章abstract::Purinergic stimulation of surfactant secretion via exocytosis of lamellar bodies is mediated by an elevation of the intracellular Ca2+ concentration ([Ca2+](i)). We tested the dihydropyridine (DHP) analogues isradipine (+/-enantiomers), nifedipine and Bay K 8644 (racemic forms) on ATP-induced surfactant secretion and ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/s0006-2952(01)00582-2
更新日期:2001-05-01 00:00:00
abstract::Treatment of normolipidemic rats by alkylthiopropionic acid (CETTD), resulted in a dose- and time-dependent increase in total dihydroxyacetone phosphate acyltransferase (DHAPAT) activity, in extent comparable to that of 3-thiadicarboxylic acid (BCMTD) and alkylthioacetic acid (CMTTD). Thus, in CETTD- and CMTTD-treated...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(90)90230-i
更新日期:1990-11-01 00:00:00
abstract::We have investigated the conversion of the novel anti-topoisomerase I agent CPT-11 (irinotecan; 7-ethyl-10[4-(1-piperidino)-1-piperidno]carbonyloxycamptothecin ) to its active metabolite, SN-38 (7-ethyl-10-hydroxycamptothecin), by human liver carboxylesterase (HLC). Production of SN-38 was relatively inefficient and w...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(96)00457-1
更新日期:1996-10-11 00:00:00
abstract::The hypolipidemic drug ethyl chlorophenoxyisobutyrate (clofibrate) is known to induce peroxisome proliferation and to be carcinogenic after long term administration to rats and mice. We examined the effects of treatment with this drug for periods of up to 18 months on cytosolic ATP-stimulated and ADP-inhibited acetyl-...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(93)90038-x
更新日期:1993-04-06 00:00:00
abstract::In vitro treatment of human T-cell leukemia cells with 7-hydroxymethotrexate, the major metabolite of methotrexate resulted in acquired resistance as a result of the complete loss of folypolyglutamate synthetase (FPGS) activity. This was in contradistinction to the major modality of antifolate resistance of impaired d...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2008.12.026
更新日期:2009-04-15 00:00:00
abstract::DNA methylation is a mammalian epigenetic mark that participates to define where and when genes are expressed, both in normal cells and in the context of diseases. Like other epigenetic marks, it is reversible and can be modulated by chemical agents. Because it plays an important role in cancer by silencing certain ge...
journal_title:Biochemical pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.bcp.2016.12.004
更新日期:2017-04-01 00:00:00
abstract::Sulphate conjugation was investigated using extracts of human foetal liver cells in culture. The three reactions which are involved in sulphate conjugation were measured singly or in combination: they are (i) the PAPS generation catalyzed by ATP-sulphurylase and adenosine 5'-phosphosulphate (APS)-kinase, (ii) the phen...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(88)90331-0
更新日期:1988-12-15 00:00:00
abstract::The GABA(B) receptor antagonist SGS742 (CGP36742) displays pronounced cognition enhancing effects in mice, young and old rats and in Rhesus monkeys in active and passive avoidance paradigms, in an eight-arm radial maze and a Morris water maze and in a social learning task. SGS742 blocks the late inhibitory postsynapti...
journal_title:Biochemical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/j.bcp.2004.07.030
更新日期:2004-10-15 00:00:00
abstract::"Ecstasy" [(+/-)-3,4-methylenedioxymethamphetamine or MDMA] is a CNS stimulant, whose use is increasing despite evidence of long-term neurotoxicity. In vitro, the majority of MDMA is demethylenated to (+/-)-3,4-dihydroxymethamphetamine (DHMA) by the polymorphic cytochrome P450 2D6 (CYP2D6). We investigated the demethy...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/s0006-2952(02)01028-6
更新日期:2002-06-15 00:00:00
abstract::Bezafibrate is one of the main drugs used in the treatment of human hyperlipemic diseases. Its action on the biosynthesis of fatty acids has been studied and the following conclusions have been drawn: (1) Lipogenesis from glucose is inhibited in hepatocytes and adipocytes isolated from "refed" rats previously treated ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(89)90095-6
更新日期:1989-08-01 00:00:00
abstract::Adriamycin (ADR), a well-known antitumoral drug, interacts with DNA (nuclear and mitochondrial) and cardiolipin. Moreover, ADR induces numerous mitochondrial modifications in sensitive cells. However, no results have yet been obtained as to the repercussions of drug effects on oxido-reductase activities in ADR-resista...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/s0006-2952(98)00084-7
更新日期:1998-08-15 00:00:00
abstract::The in vitro metabolic ketone reduction of warfarin and its 4'-analogues acenocoumarol (4'-nitrowarfarin) and 4'-chlorowarfarin has been investigated using microsomal and cytosolic fractions of several species. Both subcellular fractions showed ketone reductase activity. The cytosolic fractions, in most species, exhib...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(89)90635-7
更新日期:1989-10-01 00:00:00
abstract::The abundance of human equilibrative nucleoside transporter 1 (hENT1) has recently been shown to be a predictive marker of benefit from gemcitabine therapy in patients with pancreatic cancer. Since hENT1 is also important for the uptake of positron emission tomography (PET) tracer 3'-deoxy-3'-fluorothymidine (FLT) in ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2009.09.025
更新日期:2010-02-15 00:00:00
abstract::Rats were made vitamin K-deficient by feeding them a diet devoid of vitamin K and by rigorously preventing coprophagy. After one week, circulating prothrombin concentrations were between 5 and 10% of initial values, and various amounts of phylloquinone, menaquinone-4, and menaquinone-9 were given in a single dose eith...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(95)00202-b
更新日期:1995-09-07 00:00:00
abstract::Epidermal growth factor (EGF) rapidly stimulates the release of arachidonic acid in A549 cells by a mechanism that is sensitive to pertussis toxin [1]. We show that EGF treatment of A549 cells stimulates phosphorylation of cytosolic phospholipase A2 (cPLA2) through a mechanism that is similarly inhibited by pertussis ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(95)02442-5
更新日期:1996-07-26 00:00:00
abstract::The effects of green and black tea polyphenols on cyclooxygenase (COX)- and lipoxygenase (LOX)-dependent arachidonic acid metabolism in normal human colon mucosa and colon cancers were investigated. At a concentration of 30 microg/mL, (-)-epigallocatechin-3-gallate (EGCG), (-)-epigallocatechin (EGC), and (-)-epicatech...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/s0006-2952(01)00767-5
更新日期:2001-11-01 00:00:00
abstract::Limitations in efficacy and high relapse rates of currently available smoking cessation agents reveal the need for more efficacious pharmacotherapies. One strategy is to develop subtype-selective nicotinic receptor (nAChR) antagonists that inhibit nicotine-evoked dopamine (DA) release, the primary neurotransmitter inv...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2007.07.021
更新日期:2007-10-15 00:00:00
abstract::A 1.57kb BamH1 fragment containing a full-length human debrisoquine 4-hydroxylase cytochrome P450 (CYP2D6) cDNA was inserted into the BglII site of the yeast expression plasmid pMA91 and the resulting recombinant plasmid, PELT1, introduced into Saccharomyces cerevisiae strain AH22. Microsomes prepared from AH22/pELT1 ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(92)90394-x
更新日期:1992-08-18 00:00:00
abstract::Binding studies with (-)-[125I]cyanopindolol (ICYP) were conducted to characterize beta-adrenoceptors in plantaris and soleus muscles of rats (male, 250-300 g). The distribution of beta 1- and beta 2-adrenoceptors in different muscle fiber types, identified in serial sections by succinic dehydrogenase (SDH) staining, ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(91)90516-8
更新日期:1991-10-09 00:00:00
abstract::Enzymes of the UDP-glucuronosyltransferase (UGT) superfamily are responsible for the metabolism of many drugs, environmental chemicals and endogenous compounds. Identification of the UGT(s) involved in the metabolism of a given compound ('reaction phenotyping') currently relies on multiple confirmatory approaches, whi...
journal_title:Biochemical pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.bcp.2005.12.019
更新日期:2006-05-28 00:00:00
abstract::Sex differences in the diabetes-induced changes in hepatic cytochrome P450 proteins were investigated in rats treated with streptozotocin. Changes in specific cytochrome P450 proteins were monitored using diagnostic substrates and immunologically utilizing specific polyclonal antibodies. When expressed in terms of nmo...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(93)90066-6
更新日期:1993-01-26 00:00:00
abstract::Repertaxin is a new non-competitive allosteric blocker of interleukin-8 (CXCL8/IL-8) receptors (CXCR1/R2), which by locking CXCR1/R2 in an inactive conformation prevents receptor signaling and human polymorphonuclear leukocyte (PMN) chemotaxis. Given the unique mode of action of repertaxin it was important to examine ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2004.10.007
更新日期:2005-02-01 00:00:00
abstract::Adenosine is an endogenous nucleoside that regulates many physiological processes through the activation of its four receptors: A(1), A(2A), A(2B) and A(3). Previous studies have identified the involvement of A(2) receptors in the inhibitory activity of adenosine analogues on tumor necrosis factor-alpha (TNF-alpha) pr...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2004.12.008
更新日期:2005-03-15 00:00:00
abstract::We investigated the effect of aphidicolin, an inhibitor of DNA polymerase alpha and delta, on the induction of apoptosis by arabinosyl nucleosides in a human promyelocytic leukemia cell line, HL-60. Pretreatment of HL-60 cells with aphidicolin (2 microM) significantly increased the number of morphologically apoptotic ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(93)90631-6
更新日期:1993-12-03 00:00:00
abstract::The molecular mechanism(s) underlying induction of the hepatic microsomal cytochrome P4502E1 (2E1) by xenobiotics (e.g. ethanol and acetone) is controversial. Proposed mechanisms include increased rates of enzyme synthesis due to elevated 2E1 mRNA levels, enhanced translation of pre-existing mRNA, or stabilization of ...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(93)90049-3
更新日期:1993-04-06 00:00:00
abstract::Nicotinic acetylcholine receptors (nAChRs) are members of the Cys-loop family of neurotransmitter-gated ion channels, a family that also includes receptors for gamma-aminobutyric acid, glycine and 5-hydroxytryptamine. In humans, nAChRs have been implicated in several neurological and psychiatric disorders and are majo...
journal_title:Biochemical pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.bcp.2009.06.015
更新日期:2009-10-01 00:00:00
abstract::Heat shock protein 90 (Hsp90) is a molecular chaperone engaging in multiple cellular signaling by stabilizing oncoproteins (e.g. Akt and c-Raf) in tumor cells. Whereas Hsp90 inhibitors such as 17-AAG exert promising antitumor effects in clinical trials, current efforts focus on developing agents targeting Hsp90 with i...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2013.02.003
更新日期:2013-05-01 00:00:00
abstract::Irradiation of a cytosolic fraction from vascular smooth muscle in the presence of [3H]felodipine resulted in the labelling of a protein with an apparent molecular weight of 62 kDa. The labelling was seen on UV-irradiation at 360 nm, but not at 254, 278 or at wavelengths above 410 nm. The photolabelling was enhanced i...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(89)90516-9
更新日期:1989-12-01 00:00:00
abstract::The constitutive androstane receptor (CAR) modulates the transcription of numerous genes involving drug metabolism, energy homeostasis, and cell proliferation. Most functions of CAR however were defined from animal studies. Given the known species difference of CAR and the significant cross-talk between CAR and the pr...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/j.bcp.2015.08.087
更新日期:2015-11-01 00:00:00
abstract::[3H]Morphine, PL-017[prolyl-3,4-3H,D-prolyl,3,4-3H] ([3H]PL-017) and enkephalin-(2-D-penicillamine,5-D-penicillamine)[tyrosyl-2,6-3H] ([3H]DPDPE) were directly cross-linked to mouse brain opiate receptors by an ultraviolet (254 nm) irradiation procedure. [3H]Morphine preferentially and specifically labeled a 58 kDa pr...
journal_title:Biochemical pharmacology
pub_type: 杂志文章
doi:10.1016/0006-2952(93)90458-9
更新日期:1993-10-05 00:00:00