Lost in post-translational modification-Dengue virus writes its own sequel.

Area of Science:

• Immunology
• Virology
• Infectious Diseases

Background:

• Dengue virus infection poses a significant global health threat.
• The host immune response, particularly antibody profiles, plays a crucial role in dengue pathogenesis.
• Afucosylation of IgG1 antibodies is a known modulator of immune responses.

Purpose of the Study:

• To investigate the association between afucosylated IgG1 antibody levels and dengue virus infection.
• To determine if afucosylated IgG1 antibodies can predict disease severity in dengue patients.
• To explore the link between prior dengue infection and afucosylated IgG1 antibody levels.

Main Methods:

• Quantification of afucosylated IgG1 antibodies in patient serum samples.
• Analysis of patient history for prior dengue virus infections.
• Correlation analysis between antibody levels, prior infection status, and clinical disease severity.

Main Results:

• A significantly elevated frequency of afucosylated IgG1 antibodies was observed during dengue virus infection.
• Higher levels of afucosylated IgG1 antibodies were strongly associated with a history of prior dengue infection.
• The presence of elevated afucosylated IgG1 antibodies was a significant predictor of severe dengue disease.

Conclusions:

• Afucosylated IgG1 antibodies are a key immunological marker in dengue virus infection.
• Prior dengue infection primes the immune system to produce afucosylated IgG1 antibodies, increasing severe disease risk.
• Monitoring afucosylated IgG1 antibody levels may aid in predicting dengue disease severity.