Abstract | BACKGROUND: RESULTS: We investigated that acidosis and hypoxia selectively and rapidly upregulated Homer1a expression, but not Homer1b/c in cultured cortical neurons. We also found that Homer1a exhibited induction expression in brain cortex of the middle cerebral artery occlusion (MCAO) rats. Additionally, acid-evoked Homer1a mRNA induction depended on extracellular signal-regulated kinase1/2 (ERK1/2) and Akt activity, and ASIC1a-mediated calcium influx whereas hypoxia depended only on ERK1/2 activity. Also, we demonstrated that continuous acidosis and hypoxia resulted in pronounced cell injury and Homer1a knockdown with small interfering RNA aggravated this damage induced by 3 h acid and hypoxia incubation in neuro-2a cells. CONCLUSION: Homer1a might act as an activity-dependent regulator responding to extracellular stimuli during cerebral ischemia.
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Authors | Jing-Jing Su, Hui Pan, Hou-Guang Zhou, Yu-Ping Tang, Qiang Dong, Jian-Ren Liu |
Journal | CNS neuroscience & therapeutics
(CNS Neurosci Ther)
Vol. 20
Issue 3
Pg. 264-74
(Mar 2014)
ISSN: 1755-5949 [Electronic] England |
PMID | 24433527
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2014 John Wiley & Sons Ltd. |
Chemical References |
- Acid Sensing Ion Channel Blockers
- Acid Sensing Ion Channels
- Carrier Proteins
- Excitatory Amino Acid Antagonists
- Homer Scaffolding Proteins
- PcTX1 protein, Psalmopoeus cambridgei
- Peptides
- Spider Venoms
- Dizocilpine Maleate
- 6-Cyano-7-nitroquinoxaline-2,3-dione
- Amiloride
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Topics |
- 6-Cyano-7-nitroquinoxaline-2,3-dione
(pharmacology)
- Acid Sensing Ion Channel Blockers
(pharmacology)
- Acid Sensing Ion Channels
(metabolism)
- Amiloride
(pharmacology)
- Animals
- Carrier Proteins
(genetics, metabolism)
- Cell Survival
- Cells, Cultured
- Disease Models, Animal
- Dizocilpine Maleate
(pharmacology)
- Excitatory Amino Acid Antagonists
(pharmacology)
- Homer Scaffolding Proteins
- Hypoxia
(metabolism, pathology)
- Infarction, Middle Cerebral Artery
(metabolism, physiopathology)
- Neurons
(drug effects, metabolism)
- Peptides
(pharmacology)
- Rats
- Rats, Sprague-Dawley
- Signal Transduction
(drug effects)
- Spider Venoms
(pharmacology)
- Time Factors
- Up-Regulation
(drug effects, physiology)
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