Identification of Key Genes Associated with Endoplasmic Reticulum Stress in Calcium Oxalate Kidney Stones

Area of Science:

• Nephrology
• Molecular Biology
• Genetics

Background:

• Endoplasmic reticulum stress (ERS) is associated with kidney stone formation.
• Calcium oxalate (CaOx) kidney stones are a common form of kidney stones.
• Understanding the molecular mechanisms linking ERS and CaOx stones is crucial for developing effective treatments.

Purpose of the Study:

• To identify key genes associated with ERS in CaOx kidney stones.
• To investigate the role of these genes in CaOx stone pathogenesis.
• To develop a predictive model for CaOx kidney stone risk.

Main Methods:

• Single-cell analysis to identify key cells and ERS-related genes (ERSRGs).
• Differential gene expression analysis to find key genes in CaOx kidney stone samples.
• Nomogram construction for risk prediction, GSEA for functional enrichment, and secondary clustering for cell subtypes.
• Validation of key genes using qRT-PCR and Western blot in cultured HK-2 cells.

Main Results:

• Endothelial cells were identified as key cells with nine pinpointed genes: ACSL4, PTK2, DUSP4, MMP7, PHLDB2, TGM2, PPT1, SPARCL1, and LTF.
• A nomogram incorporating these genes showed strong predictive ability for CaOx kidney stone risk.
• GSEA indicated olfactory transduction enrichment, and secondary clustering revealed four endothelial cell subtypes with differential gene expression. qRT-PCR and Western blot validated altered expression of several key genes in CaOx-exposed cells.

Conclusions:

• This study successfully identified key genes associated with ERS in CaOx kidney stones.
• These findings offer novel insights into CaOx stone treatment and provide a basis for future research.
• Further investigation into the precise roles of these candidate genes is warranted for potential therapeutic interventions.