Abstract
A time-course study was carried out of the levels of submandibular kallikrein, serum insulin and blood glucose of rats rendered diabetic by alloxan or streptozotocin. The permanent hyperglycemia seen one day after treatment and the subsequent relative changes in the levels of blood glucose recorded over the following nine days were in agreement with previous observations. A significant reduction in the concentration of submandibular kallikrein did not become apparent until ten days following the injection of alloxan or streptozotocin. Thus the enzyme would not appear to have played either a causal or a preventative role in the production of the hyperglycemic state.
Furthermore, in disagreement with previous speculation, the submandibular gland had not compensated for the deficiency of insulin with an increase in production of kallikrein. The fall in the level of serum insulin had preceded the decrease in submandibular kallikrein. However, administration of exogenous insulin over a period of three days did not bring about an increase in the concentration of submandibular kallikrein of the diabetic rats. Thus insulin would not seem to be involved in controlling the level of kallikrein in the submandibular gland.
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Jaffa, A.A., Pratt, J., Ashford, A. et al. A time-course study of submandibular kallikrein, blood glucose and insulin of alloxan-diabetic and streptozotocin-diabetic rats. Agents and Actions 15, 478–481 (1984). https://doi.org/10.1007/BF01966759
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DOI: https://doi.org/10.1007/BF01966759