Title |
Intranasal Delivery of Exendin-4 Confers Neuroprotective Effect Against Cerebral Ischemia in Mice
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Published in |
The AAPS Journal, December 2015
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DOI | 10.1208/s12248-015-9854-1 |
Pubmed ID | |
Authors |
Huinan Zhang, Jingru Meng, Shimeng Zhou, Yunhan Liu, Di Qu, Ling Wang, Xubo Li, Ning Wang, Xiaoxing Luo, Xue Ma |
Abstract |
Exendin-4 is now considered as a promising drug for the treatment of cerebral ischemia. To determine the neuroprotective effects of intranasal exendin-4, C57BL/6J mice were intranasally administered with exendin-4 daily for 7 days before middle cerebral artery occlusion (MCAO) surgery. Intranasally administered exendin-4 produced higher brain concentrations and lower plasma concentrations when compared to identical doses administered interperitoneally. Neurological deficits and volume of infarcted lesions were analyzed 24 h after ischemia. Intranasal administration of exendin-4 exhibited significant neuroprotection in C57BL/6 mice subjected to MCAO by reducing neurological deficit scores and infarct volume. The neuroprotective effects of exendin-4 were blocked by the knockdown of GLP-1R with shRNA. However, exendin-4 has no impact on glucose and insulin levels which indicated that the neuroprotective effect was mediated by the activation of GLP-1R in the brain. Exendin-4 intranasal administration restored the balance between pro- and anti-apoptotic proteins and decreased the expression of Caspase-3. The anti-apoptotic effect was mediated by the cAMP/PKA and PI3K/Akt pathway. These findings provided evidence that exendin-4 intranasal administration exerted a neuroprotective effect mediated by an anti-apoptotic mechanism in MCAO mice and protected neurons against ischemic injury through the GLP-1R pathway in the brain. Intranasal delivery of exendin-4 might be a promising strategy for the treatment of ischemic stroke. |
X Demographics
Geographical breakdown
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United States | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 31 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 9 | 29% |
Researcher | 5 | 16% |
Professor | 4 | 13% |
Student > Doctoral Student | 2 | 6% |
Student > Master | 2 | 6% |
Other | 1 | 3% |
Unknown | 8 | 26% |
Readers by discipline | Count | As % |
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Pharmacology, Toxicology and Pharmaceutical Science | 4 | 13% |
Medicine and Dentistry | 4 | 13% |
Agricultural and Biological Sciences | 3 | 10% |
Engineering | 3 | 10% |
Immunology and Microbiology | 2 | 6% |
Other | 3 | 10% |
Unknown | 12 | 39% |