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Pathogenesis of dengue: an alternative hypothesis
1Institute of Medical Microbiology, University of Mainz, FRG.
The Southeast Asian Journal of Tropical Medicine and Public Health
|December 1, 1990
Summary
This study proposes a new hypothesis for dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS) pathogenesis. It suggests complement system activation, not antibody-dependent enhancement, drives disease severity after secondary dengue virus (DV) infection.
Area of Science:
- Virology
- Immunology
- Pathogenesis
Background:
- Dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS) are severe clinical manifestations of dengue virus (DV) infection.
- Current understanding implicates antibody-dependent enhancement (ADE) in DHF/DSS pathogenesis.
- Existing ADE theories focus on enhanced viral uptake by monocytes or immunopathological consequences of viral replication and T-lymphocyte activation.
Purpose of the Study:
- To present a novel, hypothetical concept on the pathogenesis of DHF/DSS.
- To propose an alternative mechanism to ADE, focusing on complement system activation.
- To offer a testable hypothesis for DHF/DSS development.
Main Methods:
- This study is primarily theoretical, presenting a new hypothesis.
- It contrasts the proposed mechanism with current ADE theories.
- The hypothesis is designed to be experimentally verifiable.
Main Results:
- The proposed hypothesis posits that secondary DV infection with pre-existing sub-neutralizing antibodies triggers a booster response.
- This leads to antibody binding and complement system activation against DV-infected cells.
- DHF/DSS are hypothesized to result from complement-mediated damage to these cells.
Conclusions:
- The study challenges the prevailing ADE theory for DHF/DSS.
- It proposes complement activation as a central pathogenic mechanism.
- This novel hypothesis offers a new avenue for DHF/DSS research and experimental validation.