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  • Title: [Dipeptidyl peptidase activities in various organs of the Wistar rat].
    Author: Görne RC, Heins J, Hilse H, Oehme P, Barth A.
    Journal: Pharmazie; 1983 Feb; 38(2):112-3. PubMed ID: 6344106.
    Abstract:
    Using Gly-Pro-pNa as a substrate, the authors photometrically determined the dipeptidyl peptidase activity in organic homogenates and serum of Wistar rats at two pH values. The activity of the serine peptidase DP IV was measured at pH = 7.6; a mixed activity (DP MA) which is composed of the activities of several dipeptidyl peptidases, at pH = 5.0. Particularly high DP IV activities were determined in the kidney, lung, adrenal gland, liver and aortic arch, the differences among the enzyme activities measured in the single organic homogenates at pH = 5.0 being smaller. The DP IV activities and the values found for DP MA in the structures of the nervous system were in general lower. Maximum DP IV values were measured in the spinal ganglion, cerebral cortex and spinal bulb; and maximum DP MA values, in the hypothalamus, cerebellum and cerebral cortex. The results obtained are discussed from the aspects of the participation of these enzymes in peptidergic regulatory mechanisms and of a possible relation to blood-pressure regulation.
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