Diabetes-induced changes in monoamine concentrations of rat hypothalamic nuclei

Milad Sami Bitar, Markku Koulu, Markku Linnoila

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39 Citations (Scopus)


Streptozotocin-induced diabetes produced marked alterations of monoamine concentrations in several hypothalamic nuclei of male and female rats. Norepinephrine (NE) concentrations were significantly elevated in the median eminence (ME), supraoptic nucleus (SON) and periventricular nucleus (PEVN) in both sexes of diabetic rats. NE concentrations in the suprachiasmatic nucleus (SCN) and ventromedial nucleus (VMN) of male and female diabetic animals remained unaltered. Serotonin (5-HT) concentrations were increased in PEVN of male and female diabetic rats. No significant changes in hypothalamic dopamine (DA) concentrations were observed. Insulin treatment reversed the diabetes-related changes in monoamine concentrations in most of the nuclei. The significance of these biochemical changes relative to the endocrine and behavioral abnormalities in diabetes is discussed.

Original languageEnglish
Pages (from-to)236-242
Number of pages7
JournalBrain Research
Issue number2
Publication statusPublished - 21 Apr 1987


  • Hypothalamic nucleus
  • Monoamine metabolism
  • Streptozotocin diabetes


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