Histochemical demonstration of creatine kinase activity using polyvinyl alcohol and auxiliary enzymes
- 1 October 1987
- journal article
- research article
- Published by Springer Nature in Journal of Molecular Histology
- Vol. 19 (10-11), 529-532
- https://doi.org/10.1007/bf01687359
Abstract
Creatine kinase activity (EC 2.7.3.2.) has been demonstrated in myocardium and skeletal muscle from rats by a method based on the incubation of cryostat sections with a polyvinyl alcohol-containing medium and the use of auxiliary enzymes. Hexokinase and glucose-6-phosphate dehydrogenase were spread on object glasses before mounting the sections to be incubated. In this way, the auxiliary enzymes were interposed between glass slide and section thus preventing loss of formazan generated within the sections. Creatine kinase activity was found to be localized in finely dispersed form along the myofibrils and as large granules in the sarcoplasm of myocardium and skeletal muscle. The formazan produced specifically by creatine kinase (test minus control), as measured cytophotometrically at 585 nm, was completely inhibited by 2mm 2,4-dinitrofluorobenzene, a specific inhibitor of creatine kinase activity. The control reaction was unaffected by the inhibitor. The results obtained with the present method are similar to results obtained with the far more complicated semipermeable membrane technique. The introduction of auxiliary enzymes in the polyvinyl alcohol method enables the development of histochemical methods for many enzymes by linking the reactions to a dehydrogenase reaction.This publication has 41 references indexed in Scilit:
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