Anhydrous microwave synthesis as efficient method for obtaining model advanced glycation end-products

Area of Science:

• Biochemistry
• Chemical Synthesis
• Molecular Biology

Background:

• Advanced glycation end-products (AGEs) are implicated in oxidative stress and inflammation.
• Investigating the synthesis and properties of medium crosslinked AGEs is crucial for understanding their biological roles.
• Optimal AGEs are water-soluble and serve as valuable markers in various assays.

Purpose of the Study:

• To synthesize medium crosslinked AGEs using myoglobin (MB) and various glycation factors.
• To compare the efficacy of high temperature water synthesis (HTWS) and high temperature microwave synthesis (HTMS) for AGE production.
• To evaluate the biochemical properties of synthesized AGEs, including their potential to activate NF-κB.

Main Methods:

• Myoglobin (MB) was glycated with D-melibiose, acrolein, D-glucose, 4-hydroksynonenal, trans-2-nonenal, and methylglyoxal under HTWS and HTMS conditions.
• Syntheses were monitored using SDS-PAGE.
• Products were analyzed via fluorescence, ELISA, immunoblotting, and electrophoretic mobility shift assay to assess NF-κB activation.

Main Results:

• HTMS proved more efficient for obtaining medium crosslinked AGEs.
• High fluorescence was observed for MB-ACR, MB-T2N, and MB-glc products.
• HTMS-derived AGEs (MB-ACR, MB-4HNE, MB-mel, MB-T2N) strongly activated NF-κB, indicating pro-inflammatory potential, while most HTWS products did not.

Conclusions:

• High temperature microwave synthesis (HTMS) is a rapid and effective method for producing medium crosslinked AGEs.
• The synthesized AGEs exhibit varying degrees of pro-inflammatory activity, with HTMS-derived products showing stronger activation of NF-κB.