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- W2335560445 abstract "Release of lysosomal acid hydrolases from dog cardiac muscle after cell damage may precede final cellular destruction. An in vivo experiment was designed to study the effects of acute myocardial ischemia on the integrity of the lysosomal particles. The left coronary artery was ligated and the animals were sacrificed at 2, 6, 24, and48 hrs. Aliquots were homogenized and separated by ultracentrifugation into supernatant (S-fraction), large granule (L-fraction) and nuclear fraction (N-fraction).Sequential arterial and coronary sinus samples, the total homogenate and its fractions (S, L and N) were assayed for the activities of cathepsin (3.4.4.23), β-glucuronidase (3.2.1.31), acid phosphatase (3.1.3.2) and cytochrome oxidase (1.9.3.1). There was a steady fall in total homogenate activity for these enzymes within 2 hrs, and the activities reached into half of intact right ventricle in the same heart at 48 hrs.Cathepsin, acid phosphatase and cytochrome oxidase activity decreased in all fractions except the S-fraction of cytochrome oxidase. The latter was the only fraction in which the activity increased after ischemia.Serum acid hydrolases, GOT and LDH titers remained elevated and varied reciprocally with their concentration in total homogenate and especially in S-fraction.The study demonstrates myocardial lysosomal and mitochondrial enzyme activity which is complex and selective retention of enzymes.Finally we demonstrated that the same situation in serum enzyme activities of human acute myocardial infarct, and that emphasized an importance of the knowledge of lysosomal concept concerning with ischemia and cell damage from a point of clinical pathology." @default.
- W2335560445 created "2016-06-24" @default.
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- W2335560445 date "1972-01-01" @default.
- W2335560445 modified "2023-09-23" @default.
- W2335560445 title "RELEASE OF LYSOSOMAL HYDROLASES AFTER ISCHEMIA IN DOG HEART" @default.
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- W2335560445 doi "https://doi.org/10.2974/kmj1951.22.169" @default.
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