d-Glycero-β-d-mannoheptose Phosphate 7-O-Modifications

Area of Science:

• Immunology
• Molecular Biology
• Organic Chemistry

Background:

• Pathogen-associated molecular patterns (PAMPs) activate immune responses via pattern recognition receptors.
• Newly identified PAMPs, d-glycero-β-d-mannoheptose phosphate and d-glycero-β-d-mannoheptose 1,7-biphosphate, trigger immune responses involving TRAF-interacting protein with a forkhead-associated domain (TIFA).
• ADP-heptose activates α-kinase 1 and TIFA, initiating an immune cascade that culminates in NF-κB activation, highlighting PAMPs' immunomodulatory potential.

Purpose of the Study:

• To investigate the in vivo host cell uptake mechanisms of d-glycero-β-d-mannoheptose phosphate, d-glycero-β-d-mannoheptose 1,7-biphosphate, and ADP-heptose.
• To synthesize molecular probes for studying these PAMPs' biological interactions.
• To develop a versatile toolbox for researchers studying PAMP-mediated immunity.

Main Methods:

• Synthesis of molecular probes through 7-O-modifications of d-glycero-β-d-mannoheptose phosphate.
• Utilized a convergent synthetic strategy involving substituent introduction at the O-7 position prior to alkene oxidation.
• Characterization of generated molecular probes.

Main Results:

• Successfully generated a diverse range of molecular probes derived from d-glycero-β-d-mannoheptose phosphate.
• The convergent synthetic approach proved effective for probe development.
• The synthesized probes are suitable for investigating PAMP uptake and function in vivo.

Conclusions:

• The developed molecular probes are crucial for elucidating the in vivo host cell uptake of key PAMPs.
• This work provides essential tools for understanding PAMP-induced immune responses.
• The findings support the pharmaceutical industry's interest in PAMPs as novel immunomodulators.