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Updated: Aug 10, 2025
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Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels
Published on: May 18, 2009
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Prothymosin α Plays Role as a Brain Guardian through Ecto-F1 ATPase-P2Y12 Complex and TLR4/MD2
Hiroshi Ueda1,2
1Department of Pharmacology and Therapeutic Innovation, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8521, Japan.
Cells
|February 11, 2023
Summary
Prothymosin alpha (ProTα) acts as a brain guardian, switching neuronal cell death from necrosis to apoptosis and protecting against ischemia. Neurotrophic factors enhance its survival actions, crucial for brain health.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Prothymosin alpha (ProTα) is identified as a necrosis inhibitor in rat cortical neurons.
- ProTα modulates neuronal cell death pathways, shifting from necrosis to apoptosis, a process influenced by neurotrophic factors (NTFs).
Purpose of the Study:
- To investigate the neuroprotective mechanisms of ProTα in ischemia-reperfusion models.
- To elucidate the molecular pathways involved in ProTα-mediated neuronal survival.
Main Methods:
- Utilized retinal and cerebral ischemia-reperfusion models in rodents.
- Investigated ProTα's interaction with specific receptors (ecto-F1 ATPase, P2Y12, TLR4/MD2/TRIF) and its effects on matrix metalloproteases.
- Analyzed phenotypes of ProTα knockout mice.
Main Results:
- ProTα reproduces NTF-assisted survival actions in ischemia models.
- In retinal ischemia, ProTα protects cells via ecto-F1 ATPase/P2Y12 and TLR4/MD2/TRIF pathways.
- In cerebral ischemia, ProTα inhibits matrix metalloproteases in microglia and endothelial cells.
- ProTα knockout mice exhibit anxiety, memory deficits, and reduced neurogenesis.
Conclusions:
- ProTα acts as a critical brain guardian against ischemia stress.
- ProTα facilitates a cell-death-mode switch, enhanced by NTFs, and supports neurogenesis.
- ProTα possesses multiple intracellular functions promoting cell survival and proliferation.
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