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Naringin Targets NFKB1 to Alleviate Oxygen-Glucose Deprivation/Reoxygenation-Induced Injury in PC12 Cells Via
Wei Cao1, She-Jun Feng2, Min-Chen Kan3
1Neurology Ward 3, Affiliated Hospital of Hebei University, Baoding, 071000, Hebei, China.
Abstract:
This study was designed to investigate the effect of naringin in oxygen-glucose deprivation/reoxygenation (OGD/R) model and its mechanism. The target gene of naringin and the enriched pathways of the gene were searched and identified using bioinformatics analysis. Then OGD/R model was built using PC12 cells, after which the cells were treated with different concentrations of naringin. Subsequently, cell proliferation and apoptosis were evaluated by cell counting kit-8 (CCK-8) and flow cytometry assays, respectively. Meanwhile, the expression of NFKB1 in PC12 cells underwent OGD/R-induced injury was detected by qRT-PCR, while apoptosis-related and pathway-related proteins were checked by Western blot. DCF-DA kit was utilized to measure the level of ROS. Our results revealed that NFKB1, which was upregulated in MACO rats and OGD/R-treated PC12 cells, was a target gene of naringin. Naringin could alleviate OGD/R-induced injury via promoting the proliferation, and repressing the apoptosis of PC12 cells through regulating the expression of NFKB1 and apoptosis-associated proteins and ROS level. Besides, the depletion of NFKB1 was positive to cell proliferation but negative to cell apoptosis. Moreover, the depletion of NFKB1 enhanced the influences of naringin on cell proliferation and apoptosis as well as the expression of apoptosis-related proteins and ROS level. Western blotting indicated that both naringin treatment and depletion of NFKB1 could increase the expression of HIF-1α, p-AKT, and p-mTOR compared with OGD/R group. What's more, treatment by naringin and si-NFKB1 together could significantly increase these effects. Nevertheless, the expression of AKT and mTOR among each group was almost not changed. In conclusion, naringin could prevent the OGD/R-induced injury in PC12 cells in vitro by targeting NFKB1 and regulating HIF-1α/AKT/mTOR-signaling pathway, which might provide novel ideas for the therapy of cerebral ischemia-reperfusion (I/R) injury.
Insights
Naringin protects PC12 cells from oxygen-glucose deprivation/reoxygenation injury by targeting NFKB1. This flavonoid promotes cell proliferation and reduces apoptosis by regulating NFKB1, reactive oxygen species, and the HIF-1α/AKT/mTOR pathway.
Area of Science:
- Neuroscience
- Pharmacology
- Cell Biology
Background:
- Cerebral ischemia-reperfusion (I/R) injury is a significant cause of neurological damage.
- Oxygen-glucose deprivation/reoxygenation (OGD/R) is a common in vitro model to study I/R injury.
- Naringin, a natural flavonoid, has shown potential therapeutic effects, but its mechanism in I/R injury requires elucidation.
Purpose of the Study:
- To investigate the protective effects of naringin against OGD/R-induced injury in PC12 cells.
- To identify the molecular targets and signaling pathways involved in naringin's mechanism of action.
- To explore the role of NFKB1 in OGD/R injury and its interaction with naringin.
Main Methods:
- Bioinformatics analysis to identify naringin's target gene and pathways.
- Establishment of an OGD/R model using PC12 cells.
- Assessment of cell proliferation (CCK-8) and apoptosis (flow cytometry).
- Measurement of NFKB1 expression (qRT-PCR), protein levels (Western blot), and reactive oxygen species (ROS) (DCF-DA kit).
Main Results:
- NFKB1 was identified as a target gene of naringin and was upregulated in OGD/R-treated cells.
- Naringin alleviated OGD/R-induced injury by increasing cell proliferation and decreasing apoptosis.
- Naringin regulated NFKB1 expression, apoptosis-associated proteins, and ROS levels.
- NFKB1 depletion enhanced naringin's protective effects and modulated apoptosis.
- Naringin and NFKB1 depletion upregulated HIF-1α, p-AKT, and p-mTOR, suggesting activation of the HIF-1α/AKT/mTOR pathway.
Conclusions:
- Naringin exerts neuroprotective effects against OGD/R-induced injury in PC12 cells.
- The mechanism involves targeting NFKB1 and modulating the HIF-1α/AKT/mTOR signaling pathway.
- Naringin's ability to regulate NFKB1, apoptosis, ROS, and key pathway proteins offers potential for treating cerebral I/R injury.
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