The type 2 diabetes drug liraglutide reduces chronic inflammation induced by irradiation in the mouse brain
Journal article
Authors | Parthsarathy, Vadivel and Holscher, Christian |
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Abstract | Chronic inflammation in the brain is found in a range of neurodegenerative diseases such as Parkinson's or Alzheimer's disease. We have recently shown that analogues of the glucagon-like polypeptide 1 (GLP-1) such as liraglutide have potent neuroprotective properties in a mouse model of Alzheimer's disease. We also found a reduction of activated microglia in the brain. This finding suggests that GLP-1 analogues such as liraglutide have anti-inflammatory properties. To further characterise this property, we tested the effects of liraglutide on the chronic inflammation response induced by exposure of the brain to 6 Gy (X-ray). Animals were injected i.p. with 25 nmol/kg once daily for 30 days. Brains were analysed for cytokine levels, activated microglia and astrocyte levels, and nitrite levels as a measure for nitric oxide production and protein expression of iNOS. Exposure of the brain to 6 Gy induced a pronounced chronic inflammation response in the brain. The activated microglia load in the cortex and dentate gyrus region of hippocampus (P<0.001), and the activated astrocyte load in the cortex (P<0.01) was reduced by liraglutide. Furthermore, the pro-inflammatory cytokine levels of IL-6 (P<0.01), IL-12p70 (P<0.01), IL-1β (P<0.05), and total nitrite concentration were reduced in the brains of animals treated with liraglutide. The results demonstrate that liraglutide is effective in reducing a number of parameters linked to the chronic inflammation response. Liraglutide or similar GLP-1 analogues may be a suitable treatment for reducing the chronic inflammatory response in the brain found in several neurodegenerative conditions. |
Keywords | neurodegenerative diseases; Alzheimer's disease; Parkinson's disease; infection; incretins; liraglutide |
Year | 2013 |
Journal | European Journal of Pharmacology |
Journal citation | 700 (1-3), pp. 42-50 |
Publisher | Elsevier |
ISSN | 0014-2999 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.ejphar.2012.12.012 |
Web address (URL) | http://hdl.handle.net/10545/622910 |
hdl:10545/622910 | |
http://europepmc.org/article/med/23276669 | |
Output status | Published |
Publication dates | 28 Dec 2012 |
Publication process dates | |
Deposited | 16 Aug 2018 |
https://repository.derby.ac.uk/item/94ww0/the-type-2-diabetes-drug-liraglutide-reduces-chronic-inflammation-induced-by-irradiation-in-the-mouse-brain
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