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Paliperidone Inhibits Ferroptosis Mediated by Autophagy in Renal Tubular Epithelial Cells by Targeting CHAC1
Xiangrong Ying1, Ke Gao1, Zhengang Luo1
1Department of Urology, Shaoxing People's Hospital, Shaoxing, 312000, China.
Abstract:
Renal tubular epithelial cell injury is a significant factor in the formation of kidney stones. However, the regulatory mechanisms behind this injury, especially the association with autophagy-mediated ferroptosis, remain unclear. This study first identified the upregulated ferroptosis related gene ChaC Glutathione Specific Gamma-Glutamylcyclotransferase 1 (CHAC1) in kidney stone samples through bioinformatics analysis. Subsequently, a damage model is established by treating renal tubular epithelial cells (HK-2) cells with calcium oxalate (CaOx) and investigated its function by downregulating CHAC1 expression through shRNA transfection. Autophagy status and oxidative stress are evaluated by detecting autophagy (LC3I, LC3II, Beclin 1) and ferroptosis (GPX4) related protein expression using GFP-LC3 adenovirus and Western Blot. In addition, the interaction between small molecule drug Paliperidone (Pali) and CHAC1 is also investigated through molecular docking and cell thermal migration assays to explore therapeutic potential. CHAC1 is upregulated in kidney stones and associated with ferroptosis. Knockdown of CHAC1 weakened CaOx-induced autophagy and ferroptosis. Moreover, Pali can target CHAC1 protein, reduce CHAC1 activity, and inhibit autophagy-mediated ferroptosis during cellular injury. Pali can inhibit autophagy-mediated ferroptosis in renal tubular epithelial cells by targeting CHAC1, offering a new direction for the treatment of kidney stones.
Insights
This study reveals that CHAC1 gene upregulation contributes to kidney stone formation by promoting autophagy-mediated ferroptosis in renal tubular cells. The drug Paliperidone targets CHAC1, inhibiting this process and offering a new kidney stone treatment strategy.
Area of Science:
- Nephrology
- Cell Biology
- Biochemistry
Background:
- Renal tubular epithelial cell injury is a key factor in kidney stone development.
- The role of autophagy-mediated ferroptosis in this injury is not well understood.
Purpose of the Study:
- To investigate the role of CHAC1 in kidney stone formation.
- To explore the therapeutic potential of Paliperidone in inhibiting autophagy-mediated ferroptosis.
Main Methods:
- Bioinformatic analysis to identify ferroptosis-related genes.
- In vitro cell models (HK-2 cells) treated with calcium oxalate (CaOx).
- CHAC1 gene knockdown via shRNA, protein expression analysis (Western Blot), autophagy and ferroptosis marker detection, molecular docking, and cell thermal migration assays.
Main Results:
- CHAC1 was found to be upregulated in kidney stones and linked to ferroptosis.
- CHAC1 knockdown reduced CaOx-induced autophagy and ferroptosis.
- Paliperidone (Pali) was shown to target CHAC1, inhibit its activity, and reduce autophagy-mediated ferroptosis.
Conclusions:
- CHAC1 upregulation is associated with kidney stone formation via autophagy-mediated ferroptosis.
- Paliperidone effectively inhibits this pathway by targeting CHAC1.
- Targeting CHAC1 offers a novel therapeutic approach for kidney stone treatment.
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