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C Luu Duc

Publications and source records attributed to C Luu Duc.

12 recordsLinked to original sources
PubMed1988

Drug-protein interactions. On the protein-protein interaction induced by levamisole in vitro. A mechanism hypothesis.

In the present communication, a model is reported in order to explain the aggregation of albumin induced by levamisole in vitro. The hypothesis suggests that the process of polymerization of albumins may include ligand-protein interaction as a biochemical catalysis, and covalent protein-protein interactions by a mechanism of disulfide-sulfhydryl interchange by intramolecular or intermolecular reactions.

Albumins↗
PubMed1982

Drug -- protein interactions in vitro. Effect of levamisole on human serum albumin.

The actions of (--)-2,3,5,6-tetrahydro-6-phenylimidazo[2,1-b]thiazole (levamisole) on human serum, human serum albumin (HSA) and bovin serum albumin (BSA) were studied. Analysis by polyacrylamide gel electrophoresis and immunodiffusion on gelose revealed the presence of aggregate forms of albumin in the human serum and a quantitative variation of polymeric forms with supplementary induced forms in case of HSA and BSA. The effect of other compounds with levamisole-like chemical groups including SH group or thiazolidine ring was investigated in similar conditions; aggregates were not observed. When the human serum was treated with these compounds, analysis by immunoelectrophoresis did not indicate a morphological change of lines of precipitate of immunoglobulins G and A previously described for levamisole action. The polymerization of albumin induced by the levamisole has been discussed. The whole of the data suggests that this drug may act in a specific way on the protein structure.

Animals↗
PubMed1981

Drug protein interactions.

Effects of two antirheumatic drugs, D-penicillamine and (-)-2,3,5,6-tetrahydro-6-phenylimidazo[2,1-b] thiazole (levamisole), on some human serum proteins with specific function are reported. Drug effects on the interaction corticosterone-corticosteroid binding globulin (CBG) in vitro were investigated especially by polyacrylamide gel electrophoresis. A quantitative modification of the % of corticosterone bound to CBG was noted. Drug effects on immunoglobulins involved in immune processes are described. Comparative studies by polyacrylamide gel electrophoresis and immunoelectrophoresis showed that addition of levamisole to the serum in vitro may give results different from those obtained when D-penicillamine was added. D-Penicillamine treatment was shown to induce principally a modification of Ig M, whereas levamisole caused a modification of Ig G and Ig A. On the other hand, "abnormal" fractions were noted by disc polyacrylamide gel electrophoresis when the serum was incubated with levamisole.

Anti-Inflammatory Agents↗
PubMed1979

Derivatives of benzimidazole: vasodilator activity of 2-(p-chloro-alpha-hydroxybenzyl)-benzimidazole hydrochloride. Preliminary study.

The effects of 2-(p-chloro-alpha-hydroxybenzyl)-benzimidazole hydrochloride (HBBPC) have been studied in the rabbit and rat. Most of these studies were performed comparatively with reference vasodilators and papaverine. HBBPC vasodilator activity is nearly the same as that of papaverine in the isolated rabbit ear. The characteristic of the vasoactive action of HBBPC seems to reside in its duration. The mechanism of action of HBBPC seems of peripheral type, that is to say it acts on the vascular smooth muscle.

Animals↗
PubMed1979

Vasodilator activity of 2-(p-chloro-alpha-hydroxybenzyl)benzimidazole (HBBPC) on femoral vascular bed of the rabbit.

The effects of 2-(p-chloro-alpha-hydroxybenzyl) benzimidazole HCl (HBBPC) have been studied on the femoral peripheral resistance (i.v. route) and only femoral blood flow (local i.a. injection), in comparison with other vasodilators, i.e., sodium nitroprusside, dihydralazine and piribedil. The vasomotor activity of HBBPC, namely, decreased peripheral resistance and increased femoral blood flow, seems interesting because it begins after pressure has returned to normal. This substance is likely to induce a vasoconstriction in other areas (increased femoral blood flow with decreased peripheral resistance without a fall of blood pressure).

Animals↗
PubMed1978

Derivatives of methyl vinyl sulfone. Distribution and elimination of methyl (2,2-diphenyl)-vinyl sulfone labelled with 14carbon in mice.

The investigation of methyl (2,2-diphenyl)-vinyl sulfone (14C-MDVS) administered i.p. in mice shows that this product appears rapidly in the general circularoty system. The blood concentration of MDVS reaches a maximum 1 h after injection. Part of the MDVS is bound to the plasma proteins. Infrared spectrometry analysis of radioactive products eliminated by the urine confirms that the product is not split, but also reveals the presence of hydroxyl and carbonyl groups in the metabolic conversion products.

Animals↗