Wnt pathway activation in long term remnant rat model

Area of Science:

• Nephrology
• Molecular Biology
• Pathology

Background:

• Chronic kidney disease (CKD) progression involves irreversible extracellular matrix deposition and tubulointerstitial fibrosis.
• Aberrant activation of the Wnt/β-catenin pathway is implicated in progressive damage during chronic organ failure.

Purpose of the Study:

• To evaluate the rat 5/6 renal mass reduction (RMR) model for Wnt/β-catenin pathway activation.
• To determine if the RMR model is suitable for future therapeutic modulation of this pathway in CKD.

Main Methods:

• The 5/6 RMR model in rats was assessed at 12 and 18 weeks post-surgery.
• Molecular and histological analyses were performed to confirm CKD progression.
• Wnt pathway components were quantified at both mRNA and protein levels.

Main Results:

• The RMR model demonstrated molecular and histological features of advanced CKD.
• Significant Wnt pathway activation was observed, evidenced by increased β-catenin mRNA levels.
• Nuclear translocation of β-catenin in tubular epithelium and upregulation of target genes confirmed pathway activity.

Conclusions:

• The rat 5/6 RMR model is validated as a suitable experimental system for studying Wnt/β-catenin pathway activation in CKD.
• This model supports future investigations into modulating the Wnt pathway for therapeutic interventions in CKD progression.