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TerminatedNCT03489577POSEIDONUpdated Apr 5, 2018

The Role of Post-traumatic Inhibition of the Innate and Adaptive Immune System in the Development of Infectious Complications in Severely Injured Patients

An observational study in Multiple Trauma, Sepsis and Innate Immune Response, sponsored by UMC Utrecht. Terminated at 1 site in Netherlands. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2018-04-05.

Sponsored by UMC Utrecht · Observational

Why this study was terminated
Interim analysis provided enough data
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
15
Ages
18 Years to 80 Years
Sex
All
01

Study summary

Patients admitted to the Intensive Care Unit after severe injury are prone to suffer from infectious complications and even sepsis. Despite tremendous efforts the etiology of this increased susceptibility to infectious pathogens is incompletely understood. Clinical signs and symptoms as well as current diagnostic clinical tests (WBC, CRP, cytokines, interleukines) lack sensitivity or specificity for adequate prediction of the development of infectious complications or sepsis.

Neutrophil granulocytes, cells of the innate immune system, play an important role in the defence against invading bacterial pathogens and are crucial in preventing fulminant infections. For successful eradication of a bacterium neutrophils need to exert specific functions: chemotaxis, migration, phagocytosis, degranulation and production of radical oxygen species. Much research has focused on the effect of trauma on neutrophil's individual capacities to kill bacteria with conflicting interpretations as a result. For adequate determination of the neutrophil's capacity to eradicate bacteria from tissue of trauma patients we developed novel in-vitro assays in which neutrophils are tested for all of these functions combined. This assay allows us to identify dysfunctional neutrophils adequately.

The main focus of this study is the determination of the functionality of aberrant neutrophils circulating in the peripheral blood of severly injured following trauma.

02

Conditions studied

  • Multiple Trauma
  • Sepsis
  • Innate Immune Response
  • Disorder of Neutrophils
  • Multiple Organ Dysfunction Syndrome

Keywords

  • Inflammation
  • Multiple Organ Failure
  • Sepsis
  • Wounds and Injuries
  • Pathologic Processes
  • Shock
  • Infection
  • Systemic Inflammatory Response Syndrome
  • Neutrophils
  • PMN
  • Granulocytes
  • Innate immunity
  • ICU
  • Intensive Care
  • polytrauma
  • host-pathogen
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In context

Multiple Trauma

139 studies on the registry are indexed under Multiple Trauma; 32 are open to participants now.

This study's enrollment of 15 is below the median of 200 across 84 observational studies indexed under Multiple Trauma.

Browse Multiple Trauma studies →

Lead sponsor

UMC Utrecht is the lead sponsor of 364 studies on the registry; 82 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Trauma patients likely to be admitted to the intensive care unit of the UMCU

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Admitted to the ICU
  • Expected stay of at least 2 days
  • Age: 18 - 80 years
  • (when proxy consent is obtained and the patient leaves the ICU in good mental health, personal informed consent is additionally necessary)

Exclusion criteria

Exclusion Criteria:

  • medication
  • and related diseases
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

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Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
15 participants (actual)
Patient registry
No
Biospecimen retention
Samples without dna
06

What researchers measure

Primary outcomes

  1. Bactericidal capacity of neutrophils and sepsis

    The correlation between reduced bactericidal capacity of neutrophils acquired from severely injured patients and the late occurrence of sepsis

    Time frame: 15 days following admission on ICU

Secondary outcomes

  1. Bactericidal capacity of neutrophils and infectious complications

    The correlation between reduced bacterial killing by neutrophils acquired from trauma patients and the occurrence of infectious complications (e.g pneumonia, meningitis, pericarditis, urinary tract infections, abdominal abscesses)

    Time frame: 15 days following admission to the ICU

  2. Bactericidal capacity of neutrophils and pro-inflammatory complications

    The correlation between bactericidal function of neutrophils and the occurrence of pro-inflammatory complications (SIRS).

    Time frame: 15 days following admission to the ICU

  3. Priming capacity of neutrophils and infectious complications

    The relationship between the responsiveness of neutrophils to a priming stimulus (fMLP) and the occurrence of infectious complications

    Time frame: 15 days following admission on the ICU

  4. Complement system and infectious complications

    The correlation between functionality of the complement system and the occurence of infectious complications.

    Time frame: 15 days following admission to the ICU

  5. T-cell proliferation and infectious complications

    The difference in suppression of T-cell proliferation in patients suffering infectious complications versus non-infectious patients.

    Time frame: 15 days following admission on ICU

07

Study locations

1 site
  • University Medical Center Utrecht
    Utrecht, 3508 GA, Netherlands
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 5, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03489577
Lead sponsor
UMC Utrecht
Responsible party
Prof. dr Leenen (Prof. Dr., UMC Utrecht) — Principal investigator
First posted
Apr 5, 2018
Start date
Jun 2014
Primary completion
Jun 1, 2016
Completion
Jun 1, 2016
Last update
Apr 5, 2018

Study contacts

Pieter Leliefeld, Md
principal investigator · UMC Utrecht
Luke PH Leenen, Prof. Dr.
study chair · UMC Utrecht

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Mar 2018. You cannot join it, but the record below documents what was studied.

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