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Alpha 2-macroglobulin and fibrinogen modulate inflammatory edema in man
J van Gool1, H van Vugt, E de Bont
1Laboratory of Experimental Medicine, University of Amsterdam Academic Medical Center, The Netherlands.
Inflammation
|June 1, 1990
Summary
Acute-phase proteins (APPs) like alpha 2-macroglobulin and fibrinogen influence vaccine-induced edema. High alpha 2-macroglobulin reduces swelling, while high fibrinogen increases it, impacting inflammatory responses.
Area of Science:
- Immunology
- Biochemistry
- Human Physiology
Background:
- Acute-phase proteins (APPs) are crucial in modulating inflammatory responses post-tissue injury, as suggested by animal studies.
- Understanding APP roles in human inflammatory conditions is essential for clinical applications.
Purpose of the Study:
- To investigate the relationship between specific APPs and inflammatory edema following human vaccination.
- To determine the influence of alpha 2-macroglobulin and fibrinogen on edema formation after immunization.
Main Methods:
- Human subjects undergoing primary immunization for cholera, typhoid, and yellow fever were monitored.
- Plasma levels of various APPs, including alpha 2-macroglobulin and fibrinogen, were measured.
- Edema volume was quantified 24 hours post-vaccination.
Main Results:
- Vaccination triggered a significant APP response in participants.
- Alpha 2-macroglobulin and fibrinogen levels were significantly correlated with edema volume.
- Elevated alpha 2-macroglobulin levels were associated with reduced edema, while high fibrinogen levels correlated with increased edema.
Conclusions:
- Both pre-vaccination and post-vaccination levels of alpha 2-macroglobulin and fibrinogen influence edema formation.
- Individual variations in plasma concentrations of these APPs play a key role in determining edema severity after vaccination-induced injury.