Neuroprotection by B355252 against Glutamate-Induced Cytotoxicity in Murine Hippocampal HT-22 Cells Is Associated with Activation of ERK3 Signaling Pathway
Autor: | Nailya Gilyazova, Qingping He, Gordon C. Ibeanu, Qi Qi, Yanni Ma, P. Andy Li |
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Rok vydání: | 2021 |
Předmět: |
MAPK/ERK pathway
MAP Kinase Signaling System Blotting Western Fluorescent Antibody Technique Glutamic Acid Pharmaceutical Science Thiophenes Hippocampal formation Hippocampus Neuroprotection Cell Line Mice Animals Viability assay Mechanistic target of rapamycin PI3K/AKT/mTOR pathway Mitogen-Activated Protein Kinase 6 Pharmacology Dose-Response Relationship Drug biology Chemistry Glutamate receptor General Medicine Cell biology Neuroprotective Agents biology.protein Signal transduction Excitatory Amino Acid Antagonists |
Zdroj: | Biological and Pharmaceutical Bulletin. 44:1662-1669 |
ISSN: | 1347-5215 0918-6158 |
Popis: | Glutamate differentially affects the levels extracellular signal-regulated kinase (ERK)1/2 and ERK3 and the protective effect of B355252, an aryl thiophene compound, 4-chloro-N-(naphthalen-1-ylmethyl)-5-(3-(piperazin-1-yl)phenoxy)thiophene-2-sulfonamide, is associated with suppression of ERK1/2. The objectives of this study were to further investigate the impact of B355252 on ERK3 and its downstream signaling pathways affected by glutamate exposure in the mouse hippocampal HT-22 neuronal cells. Murine hippocampal HT22 cells were incubated with glutamate and treated with B355252. Cell viability was assessed, protein levels of pERK3, ERK3, mitogen-activated protein kinase-activated protein kinase-5 (MAPKAPK-5), steroid receptor coactivator 3 (SRC-3), p-S6 and S6 were measured using Western blotting, and immunoreactivity of p-S6 was determined by immunocytochemistry. The results reveal that glutamate markedly diminished the protein levels of p-ERK3 and its downstream targets MK-5 and SRC-3 and increased p-S6, an indicator for mechanistic target of rapamycin (mTOR) activation. Conversely, treatment with B355252 protected the cells from glutamate-induced damage and prevented the glutamate-caused declines of p-ERK3, MK-5 and SRC-3 and increase of p-S6. Our study demonstrates that one of the mechanisms that glutamate mediates its cytotoxicity is through suppression of ERK3 and that B355252 rescues the cells from glutamate toxicity by reverting ERK3 level. |
Databáze: | OpenAIRE |
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