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Folia Neuropathologica
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abstract:
Original paper

The neuroprotective effect of long non-coding RNA TINCR against cerebral ischemia-reperfusion injury via targeting miR-125b-5p

Lifang Guo
1
,
Panpan Wu
2
,
Rongjiao Zhou
3
,
Hongyan Wang
1
,
Meng Li
1
,
Haitao Zhang
1
,
Deyong Du
1

  1. Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou 256603, China
  2. Department of Neurological Intervention, Binzhou Medical University Hospital, Binzhou 256603, China
  3. The Clinical Skills Training Center, Binzhou Medical University Hospital, Binzhou 256603, China
Folia Neuropathol 2024; 62:
DOI: https://doi.org/10.5114/fn.2023.133134
Online publish date: 2024/09/19
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Introduction:
Cerebral ischemia-reperfusion (CI/R) injury commonly occurs in ischemic stroke (IS) patients. The study examined the role of long non-coding RNA (lncRNA) TINCR in a middle cerebral artery occlusion and reperfusion (MCAO/R) induced rat model and oxygen-glucose deprivation/re-oxygenation (OGD/R) induced neuron cell models.

Material and methods:
Rats were treated with MCAO/R to induce IS animal models and neural stem cells (NSCs) were treated with OGD/R to establish cell models. The neurological function, cerebral infarction area, and inflammation of rats were evaluated. Cell proliferation, migration and apoptosis were assessed. Target association between TINCR and miR-125b-5p was verified. Based on the competing endogenous RNA (ceRNA) regulatory network, the rescue experiments were done in NSCs via cell transfection.

Results:
In MCAO/R rats, downregulated expression of lncRNA TINCR was tested, accompanied by neurological dysfunction and cerebral infarction. TINCR overexpression in rats led to the recovery of neurological dysfunction and cerebral infarction, while inflammation and apoptosis were inhibited. In accordance with in vivo experiment results, declined TINCR was also tested in OGD/R treated NSCs. The rescue experiments demonstrated that TINCR overexpression promoted NSC proliferation and migration, but suppressed cell apoptosis and inflammation. TINCR serves as a ceRNA of miR-125b-5p, and miR-125b-5p abolished the protective role of TINCR in OGD/R cell models.

Conclusions:
LncRNA TINCR attenuated CI/R injury through competitively binding to miR-125b-5p.

keywords:

cerebral ischemia-reperfusion injury, TINCR, MiR-125b-5p, inflammation, neuron apoptosis
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