A Mercaptoacetamide-Based Class II Histone Deacetylase Inhibitor Increases Dendritic Spine Density via RasGRF1/ERK Pathway
| Autor: | Jung Min Song, Emily Isabella Moffat, You Me Sung, Daniel T.S. Pak, Andrew Chung, Hyang Sook Hoe, Hyejin Yoon, Jin Han Nam, Jungsu Kim, Mira Jung |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
MAPK/ERK pathway Dendritic spine MAP Kinase Signaling System medicine.drug_class Dendritic Spines Blotting Western Green Fluorescent Proteins Immunocytochemistry Biology Hippocampal formation Real-Time Polymerase Chain Reaction Transfection Hippocampus Receptors N-Methyl-D-Aspartate Rats Sprague-Dawley 03 medical and health sciences 0302 clinical medicine Ras-GRF1 Acetamides medicine Animals RNA Messenger Receptors AMPA Cells Cultured Cerebral Cortex Gene knockdown ras-GRF1 General Neuroscience Histone deacetylase inhibitor General Medicine Immunohistochemistry Cell biology Histone Deacetylase Inhibitors Mice Inbred C57BL Psychiatry and Mental health Clinical Psychology 030104 developmental biology Ras Signaling Pathway Gene Knockdown Techniques Thioglycolates Geriatrics and Gerontology 030217 neurology & neurosurgery |
| Zdroj: | Journal of Alzheimer's Disease. 51:591-604 |
| ISSN: | 1875-8908 1387-2877 |
| DOI: | 10.3233/jad-150717 |
| Popis: | Background: The accumulation of amyloid- (A) leads to the loss of dendritic spines and synapses, which is hypothesized to cause cognitive impairments in Alzheimer’s disease (AD) patients. In our previous study, we demonstrated that a novel mercaptoacetamide-based class II histone deacetylase inhibitor (HDACI), known as W2, decreased A levels and improved learning and memory in mice. However, the underlying mechanism of this effect is unknown. Objective: Because dendritic spine formation is associated with cognitive performance, here we investigated whether HDACI W2 regulates dendritic spine density and its molecular mechanism of action. Methods: To examine the effect of HDACI W2 on dendritic spine density, we conducted morphological analysis of dendritic spines using GFP transfection and Golgi staining. In addition, to determine the molecular mechanism of W2 effects on spines, we measured the levels of mRNAs and proteins involved in the Ras signaling pathway using quantitative real-time PCR, immunocytochemistry, and western analysis. Results: We found that HDACI W2 altered dendritic spine density and morphology in vitro and in vivo. Additionally, W2 increased the mRNA or protein levels of Ras GRF1 and phospho-ERK. Moreover, knockdown of RasGRF1 and inhibition of ERK activity prevented the W2-mediated spinogenesis in primary hippocampal neurons. Conclusion: Our Class II-selective HDACI W2 promotes the formation and growth of dendritic spines in a RasGRF1 and ERK dependent manner in primary hippocampal neurons. |
| Databáze: | OpenAIRE |
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