Microarray analysis reveals long non‑coding RNA SOX2OT as a novel candidate regulator in diabetic nephropathy

Area of Science:

• Genomics
• Molecular Biology
• Nephrology

Background:

• Diabetic nephropathy (DN) is a complex kidney disease with poorly understood molecular mechanisms.
• Long non-coding RNAs (lncRNAs) are implicated in various diseases, but their role in DN is largely unknown.

Purpose of the Study:

• To investigate the role of lncRNAs in the pathogenesis of diabetic nephropathy.
• To identify specific lncRNAs that are differentially expressed and potentially functional in DN.

Main Methods:

• Utilized db/db mice as a diabetic nephropathy model and db/m mice as controls.
• Employed microarray and bioinformatics analysis to identify differentially expressed genes and lncRNAs.
• Performed Gene Ontology and KEGG pathway analysis to understand biological alterations.
• Constructed lncRNA-mRNA co-expression networks.
• Validated findings using RT-qPCR and FISH in cultured human podocytes and mesangial cells.

Main Results:

• Identified significant alterations in gene expression and biological pathways associated with DN.
• Revealed a complex lncRNA-mRNA interaction network in DN.
• Discovered that SOX2-overlapping transcript (SOX2OT) is significantly downregulated in DN models.
• Confirmed SOX2OT downregulation in human kidney cells relevant to DN.
• Observed cell-type-specific localization of SOX2OT.

Conclusions:

• SOX2OT is a conserved lncRNA downregulated in diabetic nephropathy.
• SOX2OT may function as a critical regulator in DN pathogenesis by interacting with key mRNAs.
• Further research into SOX2OT's mechanisms could offer new therapeutic targets for DN.