Document Detail


Effects of APP 5-mer peptide analogue P165 on the synaptic proteins and insulin signal transduction proteins.
MedLine Citation:
PMID:  24753747     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Diabetic encephalopathy (DE) is one of risk factors for Alzheimer's disease (AD). Our previous findings indicated that DE animals had impairment of learning and memory and degeneration of hippocampal neurons, which could be improved by neurotrophic peptide. APP 17-mer peptide is a synthesized peptide sequenced from soluble amyloid precursor protein. APP 17-mer peptide has neural protective effect, but is susceptible to enzyme degradation. Soluble APP 5-mer peptide is the active form of APP 17-mer peptide, and composed of arginine, glutamic acid, arginine, methionine and serine. P165, an APP 5-mer peptide analog reconstructed by our lab, is resistant to enzyme degradation, and can be orally used to protect neurons. In the present study, high glucose and Aβ25-35 were used to cause injury to human neuroblastoma cell line SH-SY5Y in vitro, and streptozotocin was used to induce diabetes in mice in vivo. The changes in synaptic proteins and proteins of insulin signal transduction which closely correlate with learning and memory were detected in these cells and the brain of mice. Results showed that P165 could up-regulate the expression of α-synuclein and insulin receptor (IR), down-regulate the expression of insulin receptor substrate-1 (IRS-1), PSD-95, Shank1 and MAPK expression. All these findings suggest that nicorandil might be a potential drug used for the treatment of AD.
Authors:
Bo Feng; Peng Hu; Shu-Jun Lu; Rong Wang; Yi-Feng Du
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Publication Detail:
Type:  Journal Article     Date:  2014-03-15
Journal Detail:
Title:  International journal of clinical and experimental medicine     Volume:  7     ISSN:  1940-5901     ISO Abbreviation:  Int J Clin Exp Med     Publication Date:  2014  
Date Detail:
Created Date:  2014-04-22     Completed Date:  2014-04-22     Revised Date:  2014-04-24    
Medline Journal Info:
Nlm Unique ID:  101471010     Medline TA:  Int J Clin Exp Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  549-57     Citation Subset:  -    
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