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1.
Acta physiol. pharmacol. ther. latinoam ; 45(2): 115-22, 1995. ilus, graf
Article in English | LILACS | ID: lil-161100

ABSTRACT

El objetivo de este estudio fue extraer y cuantificar el activador de plasminógeno AP en glándulas salivares de la rata. AP se extrajo por homogeneización de 1 vol de tejido com 1 vol de una solución de 2M KSCN. La solución con AP fue pipeteada por triplicado en placas de fibrina PF ricas y pobres en plasminógeno. La actividad fibrinolítica inducida por AP se observó como áreas circulares de licuefacción medidas en mm2, resultado del producto de dos diámetros perpendiculares de las zonas de lisis. El AP de la submaxilar produjo un término medio de actividad lítica de 198 mm2 + ou - 18ESM únicamente en PF ricas en plasminógeno. Extrapolando al área de lisis producida por 50 mg/ml de plasmina. No se observó lisis con AP extraído de la parótida y sublingual. La droga antifibrinolítica E-ACA, redujo significantemente, en una acción inhibitoria, dosis dependiente, la actividad fibrinolítica del AP de la submaxilar. El hecho de que AP indujo lisis únicamente en PF ricas en plasminógeno, la que fue significativamente reducida por E-ACA, indica claramente que la actividad lítica observada en el sustrato fibrina es debido a una fibrinolisis específica y no debido a una proteólisis no específica


Subject(s)
Animals , Rats , Antifibrinolytic Agents/pharmacology , Fibrinolysin/pharmacology , Submandibular Gland/enzymology , Tissue Plasminogen Activator/isolation & purification , Antifibrinolytic Agents/metabolism , Fibrinolysin/metabolism , Rats, Wistar
2.
Acta odontol. latinoam ; 8(1): 51-9, 1994.
Article in Spanish | LILACS-Express | LILACS, BINACIS | ID: biblio-1157680

ABSTRACT

Heparin present in tissue has been reported to be a potential locally active agent responsible for bone resorption by the stimulation of collagenase via osteoclast activation and increased collagenase synthesis by the osteoblast. The purpose of this study was to extract, identify and quantify heparin in the [quot ]clinically normal[quot ], mildly and severely inflamed gingiva of Beagle dogs, using a simple and reliable technique. The extraction was carried out by homogenization, fat elimination, proteolytic digestion and precipitation, with organic solvents. Identification was performed by microelectrophoresis conducted on an agarose coated microscope slide. Quantification was performed by measuring the optical density of the metachromatic toluidine blue stained spot an comparing with the standard reference curve of heparin run simultaneously. The results showed that the difference in concentration of heparin in units per gram of wet tissue, was not significant when the [quot ]clinically normal[quot ] (26 +/- 1.9) was compared with mildly inflamed (24.4 +/- 4.7) gingiva. However, the concentration of heparin in severe gingivitis (79 +/- 7) was significantly higher. Gingival heparin could play important role in the established periodontal lesions, acting as a local factor or co-factor in periodontal bone destruction.

4.
Acta odontol. latinoam ; 2(2): 59-65, 1985. ilus
Article in English | LILACS | ID: lil-55590

Subject(s)
Dogs , Animals , Male , Gingiva , Heparin
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