Glycan Recognition in Human Norovirus Infections

Area of Science:

• Virology
• Glycobiology
• Immunology

Background:

• Cell-surface glycan recognition is critical for viral attachment.
• Human norovirus (HuNoV), a major gastrointestinal pathogen, utilizes histo-blood group antigens (HBGAs) for initial cell binding.
• HBGAs are fucosylated carbohydrate structures found on cell surfaces.

Purpose of the Study:

• To review the discovery of HBGAs as genetic susceptibility factors for HuNoV infection.
• To summarize biochemical and structural studies on HuNoV-HBGA interactions.
• To discuss the utility of human intestinal enteroids (HIEs) in studying HuNoV infection and neutralization.

Main Methods:

• Review of existing literature on HuNoV-HBGA interactions.
• Analysis of studies using human intestinal enteroids (HIEs) as a cultivation system for HuNoV.
• Examination of mechanisms of antibody-mediated neutralization.

Main Results:

• HBGAs are confirmed as necessary and sufficient for infection by several HuNoV strains using the HIE model.
• Antibody-mediated neutralization mechanisms involve blocking HuNoV binding to HBGAs.
• The HIE model provides a platform for further research into viral-glycan interactions.

Conclusions:

• Fucosylated HBGAs are key determinants of HuNoV host cell tropism and infection.
• Understanding HuNoV-HBGA interactions is crucial for developing effective antiviral strategies.
• The HIE model represents a significant advancement in studying HuNoV pathogenesis and host-pathogen interactions.