Changes in Histamine Metabolism in the Brains of Mice with Streptozotocin‐Induced Diabetes

Masahiro Nishibori, Ryozo Oishi, Yoshinori Itoh, Kiyomi Saeki

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6 Citations (Scopus)

Abstract

Abstract: Histamine (HA) metabolism in the brain of mice with streptozotocin (STZ)‐induced diabetes was examined. The levels of tele‐methylhistamine (t‐MH), a major metabolite of brain HA, significantly increased 3 and 4 weeks after STZ injection. However, the HA turnover rates in the diabetic mice, determined from the accumulation of t‐MH after the administration of pargyline, were not different from the control values when the animals were allowed free access to food. When the mice were starved for 15 h 4 weeks after STZ treatment, the brain levels of l‐histidine decreased significantly, whereas HA turnover increased significantly. Such changes were not observed in starved control mice. Histidine decarboxylase or HA N‐methyltransferase activity did not change after starvation in either diabetic or control mice. These results show that the histaminergic (HAergic) activity in the brains of diabetic mice remains within normal range as long as the animals are allowed free access to food. However, they also indicate that a marked enhancement of HAergic activity accompanied by a decrease in the brain l‐histidine level occurs in starved diabetic mice.

Original languageEnglish
Pages (from-to)1375-1381
Number of pages7
JournalJournal of Neurochemistry
Volume52
Issue number5
DOIs
Publication statusPublished - May 1989

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Keywords

  • Diabetes
  • Histamine
  • Histamine metabolism

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

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