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Upregulated Long Non-coding RNA ALMS1-IT1 Promotes Neuroinflammation by Activating NF-κB Signaling in Ischemic
Peng Lu1, Ye Zhang2, Huanjiang Niu1
1Department of Neurosurgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou City, Zhejiang Province, 310016, China.
Inhibition of ALMS1-IT1, a brain-expressed lncRNA, improved neurological function in stroke models by reducing neuro-inflammation. This study highlights ALMS1-IT1 as a potential therapeutic target for ischemic cerebral damage.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- ALMS1-IT1 is a newly identified long non-coding RNA (lncRNA) involved in tumor progression and patient survival.
- Human Body Map (HBM) data indicates ALMS1-IT1 is primarily expressed in brain tissues.
Purpose of the Study:
- To investigate the role of ALMS1-IT1 in neuro-inflammation and functional recovery following ischemic cerebral damage.
- To assess ALMS1-IT1 expression in a rat model of transient middle cerebral artery occlusion (tMCAO).
Main Methods:
- Established a rat model of tMCAO and an oxygen-glucose deprivation (OGD) cell model using BV2 microglial cells.
- Assessed ALMS1-IT1 expression and inhibited its function via intrathecal injection of Lv-shALMS1-IT1.
- Evaluated neuro-inflammatory responses and neurological function using modified neurological severity score (mNSS) and foot-fault tests.
Main Results:
- ALMS1-IT1 expression increased significantly after MCAO, peaking at 48 hours.
- ALMS1-IT1 inhibition reduced pro-inflammatory cytokines (IL-1β, IL-6, TNF-α) and suppressed NF-κB signaling.
- Knockdown of ALMS1-IT1 improved spatial learning and sensorimotor function in MCAO rats.
Conclusions:
- ALMS1-IT1 inhibition ameliorates neurological deficits in MCAO rats by repressing NF-κB-dependent neuro-inflammation.
- ALMS1-IT1 is a key regulator of neuro-inflammation and functional recovery after ischemic stroke.
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