Alzheimer's disease (AD), characterized by β-amyloid deposition and neurodegeneration, is the most common cause of dementia worldwide. Emerging evidence suggests that ectopic expression of micro (mi)RNAs is involved in the pathogenesis of AD. There is increasing evidence that miRNAs
expressed in the brain are involved in neuronal development, survival and apoptosis. The expression of βsite amyloid precursor proteincleaving enzyme 1 (BACE1) is regulated by dysregulated miRNAs in the brain. The present study determined the expression levels of the miRNA29 (miR29)
family in peripheral blood samples of patients with AD and demonstrated a marked decrease in the expression of miR29c compared with agematched controls. In addition, a significant increase in the exprssion of BACE1 was observed in the peripheral blood of patients with AD. Correlation analysis
revealed that the expression of miR29c was negatively correlated with the protein expression of BACE1 in the peripheral blood samples from patients with AD. The present study also investigated the role of miR29 on hippocampal neurons in vitro and in vivo. The results demonstrated
that the upregulation of miR29c promoted learning and memory behaviors in SAMP8 mice, at least partially, by increasing the activity of protein kinase A/cAMP response elementbinding protein, involved in neuroprotection. This evidence suggested that miR29c may be a promising potential
therapeutic target against AD.
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Document Type: Research Article
Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
Department of Neurology, Haikou People's Hospital, Haikou, Hainan 570208, P.R. China
Publication date: August 1, 2015
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Molecular Medicine Reports is a monthly, peer-reviewed journal available in print and online, that includes studies devoted to molecular medicine, underscoring aspects including pharmacology, pathology, genetics, neurosciences, infectious diseases, molecular cardiology and molecular surgery. In vitro and in vivo studies of experimental model systems pertaining to the mechanisms of a variety of diseases offer researchers the necessary tools and knowledge with which to aid the diagnosis and treatment of human diseases.
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