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Mouse islets cultured with vasoactive intestinal polypeptide: effects on insulin release and immunoreactivity for tyrosine hydroxylase.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Histology and Cell Biology.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Histology and Cell Biology.
2001 (English)In: Pancreas, ISSN 0885-3177, E-ISSN 1536-4828, Vol. 22, no 1, 84-90 p.Article in journal (Refereed) Published
Abstract [en]

Mouse islets cultured for 1 or 4 days with or without 10 nM vasoactive intestinal polypeptide (VIP) were stained for tyrosine hydroxylase (TH) and examined for insulin secretion during culture and in a postculture perifusion system. Exposure to exogenous VIP for 4 days increased the frequency of islet cells expressing TH-like immunoreactivity. Regardless of the culturing conditions, the islets exhibited significant insulin secretory responses to 16.7 mM glucose, the effect being potentiated by 10 nM VIP in the perifusion medium. The insulin-releasing action of glucose and the potentiating effect of VIP were less pronounced in islets cultured for 1 day with VIP than in islets cultured without this neuropeptide. The following conclusions are suggested: (a) VIP stimulates the expression of TH in mouse islet cells; (b) the latency of the VIP-induced TH is a postreceptor phenomenon; (c) islet cultures exposed to VIP represent a new instance of the association between increased functional demands on beta cells and enhanced expression of TH and a new instance of VIP having trophic effects.

Place, publisher, year, edition, pages
2001. Vol. 22, no 1, 84-90 p.
National Category
Basic Medicine
Identifiers
URN: urn:nbn:se:umu:diva-82508PubMedID: 11138978OAI: oai:DiVA.org:umu-82508DiVA: diva2:661542
Available from: 2013-11-04 Created: 2013-11-04 Last updated: 2017-12-06

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