RESUMO
Methods of fluorescent probing, spectrophotometry and microcalorimetry were applied to investigate the alterations in biophysical parameters of erythrocytes membranes, and specifically microviscosity, surface charge, molecular organization of lipid bilayer and lipid-protein interactions under conditions of acute pain syndrome produced by experimental chemical lesion. The distinctive features of non-opiod analgesics interactions and binding to the erythrocytes membranes of rats subjected to acute nociceptive pain accompanied with oxidative stress development were investigated. The abilities of analgesics under research, and namely paracetamol, aspirin, phenazone, ketorolac, pyrodazole, ketoprofenum, natrium mefenaminate, indometacin, nimesulide to make up physico-chemical complexes with lipoperoxidation modified erythrocytes surface and protein-lipid bilayer showed marked changes. The significance of oxidative damage of biophase under conditions of acute pain syndrome for analgesics effective pharmacodynamics and pharmacokinetics realization is under consideration.
Assuntos
Dor Aguda/prevenção & controle , Analgésicos não Narcóticos/metabolismo , Membrana Eritrocítica/metabolismo , Bicamadas Lipídicas/metabolismo , Acetaminofen/metabolismo , Acetaminofen/farmacologia , Analgésicos não Narcóticos/farmacologia , Animais , Antipirina/metabolismo , Antipirina/farmacologia , Aspirina/metabolismo , Aspirina/farmacologia , Calorimetria , Fracionamento Celular , Membrana Eritrocítica/química , Corantes Fluorescentes , Indometacina/metabolismo , Indometacina/farmacologia , Cetoprofeno/metabolismo , Cetoprofeno/farmacologia , Cetorolaco/metabolismo , Cetorolaco/farmacologia , Bicamadas Lipídicas/química , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Orfenadrina/metabolismo , Orfenadrina/farmacologia , Medição da Dor , Ratos , Espectrometria de Fluorescência , Sulfonamidas/metabolismo , Sulfonamidas/farmacologiaRESUMO
Energy and structural parameters of monochromanes and trimethylphenols derivatives have been chracterized through the employment of semiempirical methods of quantum chemistry. The correlation has been proved between antiradical, hepatoprotective properties of these compounds and energy and structural of their molecules that confirms the presence of relation between structure activity and electron-donor properties of the investigated monochromanes and trimethylphenols.
Assuntos
Antioxidantes/farmacologia , Cromanos/farmacologia , Fígado/efeitos dos fármacos , Modelos Químicos , Fenóis/farmacologia , Teoria Quântica , Animais , Antioxidantes/química , Fenômenos Químicos , Cromanos/química , Transporte de Elétrons , Retículo Endoplasmático/efeitos dos fármacos , Retículo Endoplasmático/metabolismo , Membranas Intracelulares/efeitos dos fármacos , Membranas Intracelulares/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Fígado/metabolismo , Fenóis/química , Ratos , Relação Estrutura-AtividadeRESUMO
Using some biochemical and physico-chemical methods of investigation, antioxidant activity and membrane protective effect of derivatives of monochromanes and trimethylphenols has been studied most active inhibitors of lipoperoxidation and the compounds capacity to structural modification of properties of the surface and hydrophobic zones of phospholipids bilayer in membranes of endoplasmic reticulum of the liver cells of rats have been determined.
Assuntos
Antioxidantes/farmacologia , Cromanos/farmacologia , Retículo Endoplasmático/efeitos dos fármacos , Membranas Intracelulares/efeitos dos fármacos , Peroxidação de Lipídeos/efeitos dos fármacos , Fenóis/farmacologia , Animais , Antioxidantes/química , Cromanos/química , Retículo Endoplasmático/metabolismo , Técnicas In Vitro , Membranas Intracelulares/metabolismo , Fígado/citologia , Fígado/efeitos dos fármacos , Masculino , Estrutura Molecular , Fenóis/química , Fosfolipídeos/metabolismo , Ratos , Relação Estrutura-AtividadeRESUMO
The biochemical mechanisms of genomoprotective action of the new derivatives of pyridinecarbonic acids--PV-3, PV-4 and PV-6 in the conditions of tetrachloromethane chemical cell damage have been studied. This effect is related to their antioxidant influence on LPO processes in transcriptionally active and repressed chromatin fractions of rat liver cells and partial restoration of these fractions structure which has been destroyed during intoxication. PV-4 possesses the most genoprotective activity among the substances studied.