Summary
An enzyme-histochemical study was performed on the rabbit common carotid artery at periods ranging from one to seventeen days following double-ligation and injections of human β, human pre-β serum lipoproteins and a physiologic saline into the lumen. The alterations in enzyme activities compared to the contralateral carotid (control) were studied for DPN diaphorase, succinic acid dehydrogenase (SDH), lactic acid dehydrogenase (LDH), glucose-6-phosphate dehydrogenase (G-6-pH DH), ATPase, AMPase, acid and alkaline phosphatase. At earlier time intervals there was a general reduction in oxidative enzyme and ATPase activities concomitant with a general increase in LDH and acid phosphatase activities. At later times oxidative enzyme and ATPase activities returned to their control levels and actually increased in the thickened intima. LDH and acid phosphatase activities remained above the control levels, especially in the thickened intima. Focal areas, presumably necrotic, demonstrated complete loss of activity for all enzymes studied. AMPase activity did not differ from the controls throughout this study, while G-6-pH DH and alkaline phosphatase activities were found only sparsely in the adventitia. The same general pattern of alteration in enzyme activity was found regardless of the substance injected into the ligated artery. Arguments for the use of this experimental model for studies on the pathogenesis of atherosclerosis are given.
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Hoff, H.F. Effect of hypoxia on phosphoesterases, oxidative and glycolytic enzymes in the rabbit common carotid artery. Histochemie 23, 244–253 (1970). https://doi.org/10.1007/BF00306426
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DOI: https://doi.org/10.1007/BF00306426