Stimulatory activity on prostacyclin production decreases in sera from streptozotocin-induced diabetic rats

T. Inoguchi, F. Umeda, J. Watanabe, H. Ibayashi

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    We recently reported that serum stimulatory activity on prostacyclin (PGI2) production by cultured bovine aortic endothelial cells decreased in noninsulin-dependent diabetic patients. In the present study, this activity was compared in streptozotocin-induced (STZ) diabetic rats and controls. Platelet-poor plasma-derived serum (PDS) from Wistar male rats stimulated 6-keto-PGF production (a stable metabolite of PGI2) by cultured bovine aortic endothelial cells, rat lung fibroblasts, and rat aortic rings in a time- and dose-dependent manner. Namely, PDS from rats has a stimulatory activity on PGI2 production (PGI2 stimulatory activity; PSA). Furthermore, PSA in PDS from STZ diabetic rats (n = 12) significantly decreased as compared with that from control rats (n = 10) using three types of in vitro systems. The reduction in PDS-stimulated PGI2 production by the vascular wall may lead to platelet hyperaggregation and thrombus formation in diabetics, which is considered to be involved in the pathogenesis of diabetic macro- or microangiopathy.

    Original languageEnglish
    Pages (from-to)243-248
    Number of pages6
    JournalDiabetes Research and Clinical Practice
    Issue number5
    Publication statusPublished - 1987


    All Science Journal Classification (ASJC) codes

    • Internal Medicine
    • Endocrinology, Diabetes and Metabolism
    • Endocrinology

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