Tunable heparan sulfate mimetics for modulating chemokine activity

Area of Science:

• Glycoscience
• Immunology
• Medicinal Chemistry

Background:

• Heparan sulfate (HS) glycosaminoglycans are crucial in biological processes, regulating protein interactions, including those with chemokines involved in immune cell migration.
• Understanding HS-protein interactions is key to modulating immune responses and related diseases.

Purpose of the Study:

• To develop an efficient synthesis for defined HS glycomimetics that mimic the structure and function of natural HS.
• To investigate the potential of these synthetic HS mimetics as modulators of chemokine activity, particularly in inflammation.

Main Methods:

• A divergent synthesis strategy using a core disaccharide precursor to generate various differentially sulfated glycopolymers.
• Testing the biological activity of synthesized HS mimetics, focusing on their ability to antagonize chemokine function and their specificity.

Main Results:

• Successfully synthesized a library of defined HS glycomimetics with varying sulfation patterns.
• A specific trisulfated HS mimetic demonstrated potent antagonism of the proinflammatory chemokine RANTES, comparable to heparin.
• This trisulfated mimetic selectively inhibited RANTES chemotaxis without affecting blood coagulation serine proteases.

Conclusions:

• The developed synthetic approach provides a versatile platform for creating HS-based glycomimetics.
• These defined HS mimetics can effectively modulate chemokine activity, offering a targeted approach to controlling immune cell migration.
• The findings highlight the potential of HS mimetics in therapeutic strategies for inflammatory diseases and for further dissecting HS-related biological functions.