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Characterization of Human Monocyte Subsets by Whole Blood Flow Cytometry Analysis
Published on: October 17, 2018
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Monocyte subset distribution is associated with mortality in critically ill patients
Konstantin A Krychtiuk, Max Lenz, Lorenz Koller
1Johann Wojta, PhD, Department of Internal Medicine II, Medical University of Vienna, Austria, Tel: +4314040046140, Fax: +4314040073587,
Thrombosis and Haemostasis
|September 9, 2016
Summary
Monocyte subset distribution in critically ill patients is linked to 30-day survival. Lower non-classical monocytes (NCM) at admission and higher intermediate monocytes (IM) at 72 hours indicate poorer outcomes, independent of other factors.
Area of Science:
- Immunology
- Critical Care Medicine
- Hematology
Background:
- Systemic inflammatory response syndrome (SIRS) is common in intensive care unit (ICU) patients.
- Monocytes, key innate immunity regulators, are implicated in SIRS.
- Monocytes comprise classical (CM), intermediate (IM), and non-classical (NCM) subsets.
Purpose of the Study:
- To investigate the association between monocyte subset distribution and 30-day survival in critically ill patients.
- To determine if specific monocyte subsets predict mortality in the ICU.
Main Methods:
- Prospective observational study of 195 consecutive cardiac ICU patients.
- Blood samples collected at admission and 72 hours post-admission.
- Analysis of monocyte subset distribution (CM, IM, NCM) using flow cytometry.
Main Results:
- Lower NCM at admission were significantly associated with 30-day non-survival.
- At 72 hours, non-survivors showed increased IM and decreased CM proportions compared to survivors.
- These associations remained significant after adjusting for age, gender, CRP, and APACHE II score.
Conclusions:
- Circulating monocyte subset distribution is a significant predictor of 30-day mortality in critically ill patients.
- Monocyte subset dynamics may reflect innate immune system status and influence ICU outcomes.
- Further research into monocyte subsets could improve prognostication and treatment strategies for ICU patients.
