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Depressed Monocytic Activity may be a Predictor for Sepsis
Nidhi Bhardwaj1, Purva Mathur1, Subodh Kumar2
1Department of Laboratory Medicine, Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India.
Journal of Laboratory Physicians
|May 8, 2015
Summary
In trauma sepsis patients, monocyte activity to produce tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) was reduced. Early identification of this immune paralysis may improve outcomes for vulnerable trauma populations.
Area of Science:
- Immunology
- Critical Care Medicine
- Trauma Surgery
Background:
- Trauma is a leading global cause of mortality, with infections frequently contributing to death.
- Bacterial infections in trauma patients activate monocytes, leading to excessive pro-inflammatory cytokine synthesis.
- Assessing monocyte activity in trauma sepsis patients is crucial for understanding disease progression and prognosis.
Purpose of the Study:
- To evaluate monocyte activity in trauma patients experiencing sepsis using flow cytometry.
- To determine the prognostic potential of monocyte function in this patient cohort.
- To investigate the relationship between monocyte cytokine production and patient outcomes.
Main Methods:
- Prospective enrollment of 16 trauma patients with sepsis and positive blood cultures, plus four healthy controls.
- Monocyte surface staining (CD14) and intracellular cytokine staining (IL-6, TNF-α) analyzed via flow cytometry.
- Procalcitonin (PCT) levels measured; clinical follow-up conducted for all patients.
Main Results:
- Four out of 16 patients died due to sepsis-related infections.
- Tumor necrosis factor-alpha (TNF-α) levels were significantly lower in non-survivors compared to controls upon stimulation.
- Survivors showed increased TNF-α levels during follow-up, indicating a potential recovery of immune response.
Conclusions:
- Monocyte production of TNF-α and IL-6 is reduced in severe sepsis among trauma patients.
- Identifying "immune paralysis" early in these patients can facilitate timely interventions.
- This approach may help salvage vulnerable trauma populations suffering from sepsis.
