TRAIL and EGFR Pathways Targeting microRNAs are Predominantly Regulated in Human Diabetic Nephropathy

Area of Science:

• Nephrology
• Genomics
• Biomarker Discovery

Background:

• Diabetic nephropathy (DN) is a major complication of diabetes, necessitating novel diagnostic and therapeutic targets.
• MicroRNA (miRNA) profiling in renal tissue and urinary extracellular vesicles (uEVs) offers a promising avenue for identifying such targets.

Purpose of the Study:

• To identify differentially expressed miRNAs in the kidney tissue and uEVs of diabetic nephropathy (DN) patients compared to controls.
• To predict and validate miRNA targets involved in key signaling pathways relevant to DN pathogenesis.

Main Methods:

• Utilized bioinformatics analysis of publicly available datasets (GEO database) including kidney tissue (GSE51674) and urinary exosomes (GSE48318).
• Employed GEO2R, a bioinformatic pipeline, and miRWalk for differential expression analysis and target prediction.
• Validated miRNA-mRNA interactions using MiRTarBase, TargetScan, MiRDB, and ShinyGO.

Main Results:

• Identified eight significantly regulated miRNAs in both renal tissue and uEVs from DN subjects, including let-7c, miR-10a, miR-10b, and miR-181c.
• Top targeted pathways included TRAIL, EGFR, Proteoglycan syndecan, VEGF, and Integrin signaling.
• Confirmed 70 miRNA-mRNA interactions with significant potential relevance to DN.

Conclusions:

• In silico analysis highlighted the dysregulation of miRNAs targeting TRAIL and EGFR signaling in DN.
• The identified miRNA-target pairs hold potential for future diagnostic and therapeutic applications in managing diabetic nephropathy.