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  Ghrelin agonist does not foster insulin resistance but improves cognition in an Alzheimer's disease mouse model

Kunath, N., van Groen, T., Allison, D. B., Kumar, A., Dozier-Sharpe, M., & Kadish, I. (2015). Ghrelin agonist does not foster insulin resistance but improves cognition in an Alzheimer's disease mouse model. SCIENTIFIC REPORTS, 5: 11452. doi:10.1038/srep11452.

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 Creators:
Kunath, Nicolas1, Author              
van Groen, Thomas2, Author
Allison, David B.2, Author
Kumar, Ashish2, Author
Dozier-Sharpe, Monique2, Author
Kadish, Inga2, Author
Affiliations:
1Clinical Research, Max Planck Institute of Psychiatry, Max Planck Society, ou_2035296              
2external, ou_persistent22              

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 Abstract: The orexigenic hormone ghrelin, a potential antagonist of the insulin system, ensures sufficient serum glucose in times of fasting. In the race for new therapeutics for diabetes, one focus of study has been antagonizing the ghrelin system in order to improve glucose tolerance. We provide evidence for a differential role of a ghrelin agonist on glucose homeostasis in an Alzheimer's disease mouse model fed a high-glycemic index diet as a constant challenge for glucose homeostasis. The ghrelin agonist impaired glucose tolerance immediately after administration but not in the long term. At the same time, the ghrelin agonist improved spatial learning in the mice, raised their activity levels, and reduced their body weight and fat mass. Immunoassay results showed a beneficial impact of long term treatment on insulin signaling pathways in hippocampal tissue. The present results suggest that ghrelin might improve cognition in Alzheimer's disease via a central nervous system mechanism involving insulin signaling.

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Language(s): eng - English
 Dates: 2015-06-19
 Publication Status: Published online
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 Identifiers: ISI: 000356541500001
DOI: 10.1038/srep11452
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Title: SCIENTIFIC REPORTS
Source Genre: Journal
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Publ. Info: Nature.com
Pages: - Volume / Issue: 5 Sequence Number: 11452 Start / End Page: - Identifier: ISSN: 2045-2322