Tetrahedral Framework Nucleic Acids Based Small Interfering RNA Targeting Receptor for Advanced Glycation End...

Area of Science:

• Biomedical Engineering
• Nanomedicine
• Molecular Biology

Background:

• Diabetes complications affect multiple organs, driven by advanced glycation end products (AGEs).
• AGEs accumulate due to hyperglycemia and processed diets, triggering inflammation and cell death via the receptor for AGEs (RAGE).
• Existing treatments often focus on hyperglycemia, necessitating alternative strategies for AGEs-induced damage.

Purpose of the Study:

• To develop a novel nanomedicine system, Tsi, for targeting RAGE and mitigating AGEs-induced complications.
• To evaluate the efficacy of Tsi in downregulating RAGE expression and suppressing downstream inflammatory pathways.
• To assess Tsi's impact on macrophage pyroptosis and its potential for synergistic treatment of diabetic complications.

Main Methods:

• Development of an siRNA-binding tetrahedral framework nucleic acid (TDN) system (Tsi) with enhanced cell membrane penetration and serum stability.
• In vitro and in vivo assessment of Tsi's ability to downregulate RAGE expression.
• Analysis of Tsi's effects on the NF-κB inflammatory pathway, antioxidant functions, and the NLRP3/caspase-1 pyroptosis axis in macrophages.

Main Results:

• Tsi effectively and persistently downregulates RAGE expression, suppressing AGEs-induced inflammation.
• Tsi inhibits the NF-κB pathway and exhibits antioxidant properties.
• Tsi regulates macrophage pyroptosis via the NLRP3/caspase-1 axis, preventing the spread of cell death signals and maintaining homeostasis.

Conclusions:

• The Tsi nanomedicine system offers a promising therapeutic strategy for diabetic complications by targeting RAGE and AGE-induced inflammation.
• Tsi demonstrates long-lasting efficacy, independent of lowering blood glucose levels.
• This approach provides a novel treatment avenue for diabetic complications and potentially age-related diseases.