English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Diarrhea was noted in rats with streptozocin-induced chronic diabetes. We have investigated the possibility that this diarrhea is a consequence of altered neuronal control of water and electrolyte absorption in the intestinal epithelium. In particular, we examined noradrenergic control because alpha-2-adrenergic agonists are known to stimulate intestinal fluid absorption. When compared with nondiabetic littermates, chronically diabetic rats exhibited significant impairment of fluid absorption by the ileum and colon, but not the jejunum. This impairment of intestinal fluid absorption was not found in either insulin-treated or untreated acutely diabetic (7 d) animals. Mucosal histology appeared normal in all of the above groups. Mucosal norepinephrine stores in the jejunum and ileum of chronically diabetic rats were estimated in vitro by the short-circuit current (Isc) response to tyramine, an agent that effectively releases stored norepinephrine. Pargyline was added to inhibit enzymatic destruction of the added tyramine. In chronically diabetic rats, the Isc response to tyramine was significantly decreased in ileum, but not in jejunum. However, when these responses were expressed as a fraction of the maximal Isc tissue response to exogenously added epinephrine, significant decreases were noted in both ileum and jejunum. In tissues from acutely diabetic rats, Isc responses to tyramine and epinephrine were no different from controls. When sympathetic denervation was produced in nondiabetic rats by treatment with 6-OH-dopamine, the pattern of impaired fluid absorption that developed was the same as that observed in chronically diabetic rats. We conclude that impaired intestinal mucosal absorption of fluid and electrolytes slowly develops in rats made diabetic with streptozocin and that this absorptive impairment is due to a loss of normally present noradrenergic innervation of enterocytes.

Diarrhea in streptozocin-treated rats. Loss of adrenergic regulation of intestinal fluid and electrolyte transport.