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Updated: Mar 19, 2026
Pseudofracture: An Acute Peripheral Tissue Trauma Model
Published on: April 18, 2011
Early changes within the lymphocyte population are associated with the development of multiple organ dysfunction
Joanna Manson1, Elaine Cole2, Henry D De'Ath2
1Barts Centre for Trauma Sciences, Blizard Institute, QMUL, London, E1 2AT, UK. Joanna.manson@gmail.com.
Background:
Early survival following severe injury has been improved with refined resuscitation strategies. Multiple organ dysfunction syndrome (MODS) is common among this fragile group of patients leading to prolonged hospital stay and late mortality. MODS after trauma is widely attributed to dysregulated inflammation but the precise mechanics of this response and its influence on organ injury are incompletely understood. This study was conducted to investigate the relationship between early lymphocyte responses and the development of MODS during admission.
Methods:
During a 24-month period, trauma patients were recruited from an urban major trauma centre to an ongoing, observational cohort study. Admission blood samples were obtained within 2 h of injury and before in-hospital intervention, including blood transfusion. The study population was predominantly male with a blunt mechanism of injury. Lymphocyte subset populations including T helper, cytotoxic T cells, NK cells and γδ T cells were identified using flow cytometry. Early cytokine release and lymphocyte count during the first 7 days of admission were also examined.
Results:
This study demonstrated that trauma patients who developed MODS had an increased population of NK dim cells (MODS vs no MODS: 22 % vs 13 %, p < 0.01) and reduced γδ-low T cells (MODS vs no MODS: 0.02 (0.01-0.03) vs 0.09 (0.06-0.12) × 10^9/L, p < 0.01) at admission. Critically injured patients who developed MODS (n = 27) had higher interferon gamma (IFN-γ) concentrations at admission, compared with patients of matched injury severity and shock (n = 60) who did not develop MODS (MODS vs no MODS: 4.1 (1.8-9.0) vs 1.0 (0.6-1.8) pg/ml, p = 0.01). Lymphopenia was observed within 24 h of injury and was persistent in those who developed MODS. Patients with a lymphocyte count of 0.5 × 10(9)/L or less at 48 h, had a 45 % mortality rate.
Conclusions:
This study provides evidence of lymphocyte activation within 2 h of injury, as demonstrated by increased NK dim cells, reduced γδ-low T lymphocytes and high blood IFN-γ concentration. These changes are associated with the development of MODS and lymphopenia. The study reveals new opportunities for investigation to characterise the cellular response to trauma and examine its influence on recovery.
Insights
Early immune responses in trauma patients predict multiple organ dysfunction syndrome (MODS). Specific lymphocyte changes, including increased NK dim cells and reduced γδ-low T cells, are linked to MODS development and higher mortality rates.
Area of Science:
- Immunology
- Trauma Surgery
- Critical Care Medicine
Background:
- Severe injury survival has improved, but multiple organ dysfunction syndrome (MODS) remains a significant cause of prolonged hospitalization and mortality.
- MODS in trauma patients is linked to dysregulated inflammation, but the exact mechanisms and impact on organ injury are not fully understood.
- Investigating early lymphocyte responses is crucial for understanding MODS development after trauma.
Purpose of the Study:
- To investigate the relationship between early lymphocyte responses and the development of MODS in trauma patients.
- To identify specific lymphocyte subsets and cytokine profiles associated with MODS.
- To explore the prognostic value of early immune markers for MODS and mortality.
Main Methods:
- An observational cohort study recruited trauma patients from a major trauma center.
- Admission blood samples were analyzed within 2 hours of injury using flow cytometry to identify lymphocyte subsets (T helper, cytotoxic T, NK, γδ T cells).
- Early cytokine release and lymphocyte counts within the first 7 days of admission were also examined.
Main Results:
- Patients who developed MODS had increased NK dim cells (22% vs. 13%) and reduced γδ-low T cells (0.02 vs. 0.09 × 10^9/L) at admission.
- Higher interferon gamma (IFN-γ) concentrations were observed in critically injured patients who developed MODS (4.1 vs. 1.0 pg/ml).
- Lymphopenia within 24 hours of injury persisted in MODS patients, with counts ≤ 0.5 × 10^9/L at 48 hours associated with a 45% mortality rate.
Conclusions:
- Early lymphocyte activation, indicated by increased NK dim cells, reduced γδ-low T cells, and high IFN-γ, is evident within 2 hours of trauma.
- These early immune changes are associated with MODS development and subsequent lymphopenia.
- The findings suggest potential for early diagnostic markers and therapeutic targets for MODS in trauma patients.
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