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Published on: July 25, 2011
ApTOLL ameliorates cognitive dysfunction and brain injury in ischemic stroke by regulating the miR-335-5p/IRAK1 axis
FengQin Qin1, Xiang Feng1, HongFu Yang1
1Department of Neurology, Chengdu Pidu District People's Hospital, Chengdu City, Sichuan Province, 611730, China.
Summary
ApTOLL therapy reduces brain damage after ischemic stroke by increasing miR-335-5p and decreasing IRAK1. This modulation of the miR-335-5p/IRAK1 pathway offers a new therapeutic strategy for stroke.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Ischemic stroke causes significant neurological damage.
- The precise molecular mechanisms of ApTOLL's neuroprotective effects are not fully understood.
- MicroRNAs (miRNAs) play a role in post-stroke recovery.
Purpose of the Study:
- To investigate how ApTOLL modulates microRNAs (miRNAs) to alleviate brain damage and cognitive dysfunction in ischemic stroke.
- To elucidate the molecular pathway involved in ApTOLL's therapeutic action.
- To explore the role of the miR-335-5p/IRAK1 axis in ApTOLL's neuroprotection.
Main Methods:
- Establishment of a rat model of ischemic stroke.
- Administration of ApTOLL and assessment of downstream molecular changes (miR-335-5p, IRAK1).
- Evaluation of infarct size, neuronal apoptosis, inflammation, oxidative damage, and autophagy.
- Experimental manipulation of miR-335-5p and IRAK1 levels to confirm the pathway.
Main Results:
- ApTOLL upregulated miR-335-5p and suppressed IRAK1 in the ischemic brain.
- ApTOLL treatment reduced infarct size, neuronal apoptosis, and brain pathology.
- ApTOLL inhibited inflammation and oxidative damage, while enhancing autophagy.
- Overexpression of miR-335-5p or knockdown of IRAK1 mimicked ApTOLL's benefits.
- Inhibition of miR-335-5p or overexpression of IRAK1 negated ApTOLL's effects.
Conclusions:
- ApTOLL exerts neuroprotective effects in ischemic stroke by modulating the miR-335-5p/IRAK1 pathway.
- ApTOLL promotes miR-335-5p expression, leading to decreased IRAK1 levels and subsequent brain damage amelioration.
- These findings highlight ApTOLL as a potential therapeutic agent for ischemic stroke via this novel mechanism.
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