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Parameters influencing membrane CD14 expression and soluble CD14 levels in sepsis
1Division of Molecular Medicine, North Shore University Hospital, Manhasset, NY, USA. thomas.glueck@klinik.uni-regensburg.de
European Journal of Medical Research
|September 11, 2001
Summary
Reduced membrane CD14 (mCD14) expression in sepsis patients indicates disease severity. Higher soluble CD14 (sCD14) levels may aid survival, suggesting differential CD14 roles in sepsis outcomes.
Area of Science:
- Immunology
- Infectious Diseases
- Critical Care Medicine
Background:
- CD14, a pattern recognition receptor, is crucial for innate immunity against bacterial pathogens.
- Both membrane (mCD14) and soluble (sCD14) forms of CD14 are involved in immune responses.
- Differential expression of CD14 may influence sepsis patient outcomes.
Purpose of the Study:
- To investigate the role of mCD14 and sCD14 in early-onset sepsis.
- To correlate CD14 levels with disease severity and patient outcomes.
Main Methods:
- Flow cytometry was used to measure mCD14 expression.
- ELISA quantified sCD14, leukocyte elastase, and C-reactive protein (CRP) in 32 sepsis patients.
- Repeated measurements were taken throughout the study.
Main Results:
- Sepsis patients initially showed reduced mCD14 expression, which normalized in survivors.
- mCD14 levels inversely correlated with disease severity, leukocyte elastase, and CRP.
- Higher sCD14 levels at study entry were associated with 28-day survival in severe sepsis patients.
Conclusions:
- Persistently low mCD14 expression is a marker of sepsis severity.
- Leukocyte elastase may cleave mCD14 from monocyte surfaces.
- Elevated sCD14 levels might be protective in sepsis.