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carnitine/carie dentaire
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A synthetic receptor for choline and carnitine.
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A synthetic receptor is described with the appropriate shape and size for alkylated trimethylammonium ions such as choline and carnitine. The structure features a deep, concave binding site, lined with aromatic walls that provide cation-pi interactions between host and guest. Molecular mechanic
L-carnitine protection in ammonia intoxication. Effect of aminocarnitine on carnitine-dependent metabolism and acute ammonia toxicity.
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Intraperitoneal administration of L-carnitine (16 mmol/kg) was reported by O'Connor et al. (FEBS Lett 166: 331-334, 1984) to fully protect mice from ammonium acetate given at a dose that kills 100% of untreated controls. Other investigators either have failed to observe protection by L-carnitine or
Failure of L-carnitine to protect mice against hyperammonemia induced by ammonium acetate or urease injection.
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Reports indicate that L-carnitine administration before 100% lethal dose of ammonium acetate suppresses the symptoms of ammonia toxicity and prevents death in mice. However, we have been unable to confirm this observation. The cause of discrepancy between our results and the results of others was
l-Carnitine affects preimplantation embryo development toward infertility in mice.
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l-Carnitine (l-Cn), despite the beneficial role as energy-generating substance delivering long-chain fatty acids to the β-oxidation pathway in mitochondria, has been accused to cause an endometriosis-like state to BALB/c mice manifested by increased inflammatory cytokines in serum and peritoneal
L-Carnitine inhibits cisplatin-induced injury of the kidney and small intestine.
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Although cis-diamminedichloroplatinum (II) (cisplatin) is a potent anticancer drug, clinical use of this agent is highly limited predominantly because of its strong side effects on the kidney and gastrointestinal tracts. We found that cisplatin impaired respiratory function and DNA of mitochondria
Free and esterified carnitine in continuous ambulatory peritoneal dialysis patients.
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Free, acetyl-, medium- and long-chain acylcarnitine and total plasma carnitine concentrations were measured in eight continuous ambulatory peritoneal dialysis (CAPD) patients and eight age- and sex-matched healthy controls. Daily loss of carnitine was also quantified in both groups, by analysis of
L-carnitine is an osmotic agent suitable for peritoneal dialysis.
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Excessive intraperitoneal absorption of glucose during peritoneal dialysis has both local cytotoxic and systemic metabolic effects. Here we evaluate peritoneal dialysis solutions containing L-carnitine, an osmotically active compound that induces fluid flow across the peritoneum. In rats,
Identification by site-directed mutagenesis of a hydrophobic binding site of the mitochondrial carnitine/acylcarnitine carrier involved in the interaction with acyl groups.
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The role of hydrophobic residues of the mitochondrial carnitine/acylcarnitine carrier (CAC) in the inhibition by acylcarnitines has been investigated by site-directed mutagenesis. According to the homology model of CAC in cytosolic opened conformation (c-state), L14, G17, G21, V25, P78, V82, M85,
Site-directed mutagenesis of the His residues of the rat mitochondrial carnitine/acylcarnitine carrier: implications for the role of His-29 in the transport pathway.
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The mitochondrial carnitine/acylcarnitine carrier (CAC) of Rattus norvegicus contains two His, His-29 and His-205. Only the first residue is conserved in all the members of the CAC subfamily and is positioned before the first of the three conserved motifs. In the homology model of CAC, His-29 is
Human mitochondrial carnitine acylcarnitine carrier: Molecular target of dietary bioactive polyphenols from sweet cherry (Prunus avium L.).
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The effect of polyphenols, recognized as the principal antioxidant and beneficial molecules introduced with the diet, extracted from sweet cherry (Prunus avium L.) on the recombinant human mitochondrial carnitine/acylcarnitine transporter (CACT) has been studied in proteoliposomes. CACT transport
Site-directed mutagenesis of charged amino acids of the human mitochondrial carnitine/acylcarnitine carrier: insight into the molecular mechanism of transport.
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The structure/function relationships of charged residues of the human mitochondrial carnitine/acylcarnitine carrier, which are conserved in the carnitine/acylcarnitine carrier subfamily and exposed to the water-filled cavity of carnitine/acylcarnitine carrier in the c-state, have been investigated
The mitochondrial carnitine/acylcarnitine carrier: function, structure and physiopathology.
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The carnitine/acylcarnitine carrier (CAC) is a transport protein of the inner mitochondrial membrane that belongs to the mitochondrial carrier protein family. In its cytosolic conformation the carrier consists of a bundle of six transmembrane α-helices, which delimit a water filled cavity opened
Nonimmune hydrops fetalis in the liveborn: series of 32 autopsies.
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Nonimmune hydrops fetalis (NIHF) or generalized soft tissue edema and cavity effusions may be due to cardiovascular diseases, congenital infections, genitourinary malformations, thoracic masses, placental conditions, chromosomal abnormalities, and idiopathic. We report 32 cases of NIHF from among
Cucurbit[7]uril host-guest complexes of cholines and phosphonium cholines in aqueous solution.
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The neutral host cucurbit[7]uril forms very stable complexes with a series of cationic cholines (R(3)NCH(2)CH(2)OR'(+)) and their phosphonium analogues (R(3)PCH(2)CH(2)OR'(+)) (R(3) = Me(3), Et(3), or Me(2)Bz, or R(3)N = quinuclidinium, and R' = H, COCH(3), CO(CH(2))(2)CH(3), or PO(3)H), and
Arginine supplementation between 41 and 146 days of pregnancy reduces uterine blood flow in dairy heifers.
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We hypothesized that arginine (Arg) supplementation during early pregnancy could foster placental vascularization. The objective of this study was to evaluate the effects of Arg supplementation on uterine artery hemodynamics between 40 and 140 days of gestation. At 41 days of gestation, 17 Holstein
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