SepsisNCT01155674
Innate Immune Functions of Immature Neutrophils
An observational study of Sepsis and SIRS, run by University Hospital, Geneva at 1 site in Switzerland.
Trial summary
Polymorphonuclear neutrophils, or granulocytes, are essential effector cells of the innate immune system against bacterial infections. Their role in sepsis has been long established as the primary phagocyte to clear the infectious process. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- How many people
- 60 participants
- Where
- 1 siteSwitzerland
- Study dates
- May 2010to Oct 2011
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: * Patients with severe sepsis or septic shock * Patients with a noninfectious systemic inflammatory response syndrome (SIRS) * Healthy donors
Who may be able to join
- Patients with severe sepsis or septic shock (according to ACCP/FCCM standard definitions) with > 5% immature neutrophils.
- Patients with a noninfectious systemic inflammatory response syndrome (SIRS), e.g. patients with head trauma or multiple trauma with > 5% immature neutrophils.
- Healthy donors
Who cannot join
- Severe immunosuppression (e.g. HIV with < 200 CD4/mm3), treatment with glucocorticoids (> 300 mg hydrocortisone/day) or other immunosuppressive therapy
- Neutropenia (neutrophils < 0.5 G/l).
- Recent chemotherapy or administration of intravenous immunoglobulins within the last 4 weeks.
Trial locations and contacts
1 site in 1 country.
Geneviève Drifte, MD contact
Switzerland1 site, 1 recruiting
- Recruiting
University Hospitals of Geneva, Intensive Care
Geneva, 1211
Jerome Pugin, MD, jerome.pugin@unige.ch
Geneviève Drifte, MD
About this study
Polymorphonuclear neutrophils, or granulocytes, are essential effector cells of the innate immune system against bacterial infections. Their role in sepsis has been long established as the primary phagocyte to clear the infectious process. In the early phase of sepsis, one observes a massive recruitment of immature neutrophils from the bone marrow into peripheral blood, the so-called "band forms" or "left shift cells". Despite the daily clinical use of neutrophil band forms count in the care of septic patients and their abundance in septic blood, no information exists on the fate of these cells, nor on their capacity to mount an efficient innate immune response. It is the goal of this proposal to study the fate and the innate immune functions of immature neutrophils obtained in patients with early septic shock. Immature neutrophils will be separated from mature neutrophils. The following functions will be studied ex vivo in mature vs. immature neutrophils from a series of patients with severe sepsis and septic shock: (1) surface expression of receptors of the innate immunity; (2) production of inflammatory mediators and reactive oxygen species in response to bacterial agonists; (3) chemotaxis; (4) phagocytosis of Gram-positive and Gram-negative bacteria; and (5) ex vivo viability (life span) and resistance to apoptosis. Importantly, the investigators have developed and mastered all in vitro assays and cell separation techniques necessary to address and answer these important questions. This project will undoubtedly shed light on the fate and function of a prominent leukocyte population circulating in patients with severe bacterial infections and sepsis.
Read the detailed description
Objectives
- Primary objective: To determine the innate immune functions of immature neutrophils in comparison to those from mature neutrophils, sampled from patients with severe sepsis and sepsis shock and in control patients (trauma patients and healthy donors (only mature neutrophils in the latter case)
- Secondary objectives: To determine the fate and span life of immature neutrophils in comparison to mature neutrophils, sampled from patients with severe sepsis and sepsis shock and in control patients (trauma patients and healthy donors (only mature neutrophils in the latter case).
Inclusion criteria
- Patients with severe sepsis or septic shock (according to ACCP/FCCM standard definitions) with > 5% immature neutrophils.
- Patients with a noninfectious systemic inflammatory response syndrome (SIRS), e.g. patients with head trauma or multiple trauma with > 5% immature neutrophils.
- Healthy donors
Exclusion criteria
- Severe immunosuppression (e.g. HIV with < 200 CD4/mm3), treatment with glucocorticoids (> 300 mg hydrocortisone/day) or other immunosuppressive therapy
- Neutropenia (neutrophils < 0.5 G/l).
- Recent chemotherapy or administration of intravenous immunoglobulins within the last 4 weeks.
Endpoints
- Surface expression of receptors of the innate immunity in immature vs. mature neutrophils.
- Production by immature vs. mature neutrophils of inflammatory mediators and reactive oxygen species in response to bacterial agonists.
- Chemotaxis of immature vs. mature neutrophils.
- Phagocytosis of Gram-positive and Gram-negative bacteria by immature vs. mature neutrophils.
- Ex vivo viability and resistance to apoptosis of immature vs. mature neutrophils.
- Keywords
- Innate immunity, Neutrophils, Band forms
- Medical subject headings
- Sepsis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Sepsis patients | Patients presenting sepsis | |
| SIRS patients | Patients presenting with the systemic inflammatory response syndrome | |
| Healthy subjects | Healthy blood donors |
What is being measured
The primary outcome is the main question the study is designed to answer.
Innate immune functions of neutrophils
- Surface expression of receptors of the innate immunity in immature vs. mature neutrophils.
- Production by immature vs. mature neutrophils of inflammatory mediators and reactive oxygen species in response to bacterial agonists.
- Chemotaxis of immature vs. mature neutrophils.
- Phagocytosis of Gram-positive and Gram-negative bacteria by immature vs. mature neutrophils.
- Ex vivo viability and resistance to apoptosis of immature vs. mature neutrophils.
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jul 2010 (estimated)
- Study startMay 2010
- Primary completionAug 2011 (estimated)
- Study completionOct 2011 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for SepsisStudies of the same condition, open and under way.
- More trials run by University Hospital, GenevaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 60 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University Hospital, Geneva
- Sponsor type
- University, hospital or other
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01155674
- Sponsor's protocol ID
- CER 09-311
- Status last verified
- Feb 2010
- First submitted
- 1 Jul 2010
- Last updated
- 2 Jul 2010
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2010. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Innate Immune Functions of Immature Neutrophils
- ClinicalTrials.gov ID
- NCT01155674
- Acronym / sponsor ID
- CER 09-311
- Keywords
- Innate immunity, Neutrophils, Band forms
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 60 participants (estimated)
- Lead sponsor
- University Hospital, GenevaUniversity, hospital or other
- Study start
- May 2010
- Primary completion
- Aug 2011 (estimated)
- Study completion
- Oct 2011 (estimated)
- First posted
- 2 Jul 2010 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Polymorphonuclear neutrophils, or granulocytes, are essential effector cells of the innate immune system against bacterial infections. Their role in sepsis has been long established as the primary phagocyte to clear the infectious process. In the early phase of sepsis, one observes a massive recruitment of immature neutrophils from the bone marrow into peripheral blood, the so-called "band forms" or "left shift cells". Despite the daily clinical use of neutrophil band forms count in the care of septic patients and their abundance in septic blood, no information exists on the fate of these cells, nor on their capacity to mount an efficient innate immune response. It is the goal of this proposal to study the fate and the innate immune functions of immature neutrophils obtained in patients with early septic shock. Immature neutrophils will be separated from mature neutrophils. The following functions will be studied ex vivo in mature vs. immature neutrophils from a series of patients with severe sepsis and septic shock: (1) surface expression of receptors of the innate immunity; (2) production of inflammatory mediators and reactive oxygen species in response to bacterial agonists; (3) chemotaxis; (4) phagocytosis of Gram-positive and Gram-negative bacteria; and (5) ex vivo viability (life span) and resistance to apoptosis. Importantly, the investigators have developed and mastered all in vitro assays and cell separation techniques necessary to address and answer these important questions. This project will undoubtedly shed light on the fate and function of a prominent leukocyte population circulating in patients with severe bacterial infections and sepsis.
Detailed description
Objectives
- Primary objective: To determine the innate immune functions of immature neutrophils in comparison to those from mature neutrophils, sampled from patients with severe sepsis and sepsis shock and in control patients (trauma patients and healthy donors (only mature neutrophils in the latter case)
- Secondary objectives: To determine the fate and span life of immature neutrophils in comparison to mature neutrophils, sampled from patients with severe sepsis and sepsis shock and in control patients (trauma patients and healthy donors (only mature neutrophils in the latter case).
Inclusion criteria
- Patients with severe sepsis or septic shock (according to ACCP/FCCM standard definitions) with > 5% immature neutrophils.
- Patients with a noninfectious systemic inflammatory response syndrome (SIRS), e.g. patients with head trauma or multiple trauma with > 5% immature neutrophils.
- Healthy donors
Exclusion criteria
- Severe immunosuppression (e.g. HIV with < 200 CD4/mm3), treatment with glucocorticoids (> 300 mg hydrocortisone/day) or other immunosuppressive therapy
- Neutropenia (neutrophils < 0.5 G/l).
- Recent chemotherapy or administration of intravenous immunoglobulins within the last 4 weeks.
Endpoints
- Surface expression of receptors of the innate immunity in immature vs. mature neutrophils.
- Production by immature vs. mature neutrophils of inflammatory mediators and reactive oxygen species in response to bacterial agonists.
- Chemotaxis of immature vs. mature neutrophils.
- Phagocytosis of Gram-positive and Gram-negative bacteria by immature vs. mature neutrophils.
- Ex vivo viability and resistance to apoptosis of immature vs. mature neutrophils.
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Sepsis patients | – | –Patients presenting sepsis |
| SIRS patients | – | –Patients presenting with the systemic inflammatory response syndrome |
| Healthy subjects | – | –Healthy blood donors |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- * Patients with severe sepsis or septic shock * Patients with a noninfectious systemic inflammatory response syndrome (SIRS) * Healthy donors
Key inclusion criteria (3 listed)
- Patients with severe sepsis or septic shock (according to ACCP/FCCM standard definitions) with > 5% immature neutrophils.
- Patients with a noninfectious systemic inflammatory response syndrome (SIRS), e.g. patients with head trauma or multiple trauma with > 5% immature neutrophils.
- Healthy donors
Key exclusion criteria (3 listed)
- Severe immunosuppression (e.g. HIV with < 200 CD4/mm3), treatment with glucocorticoids (> 300 mg hydrocortisone/day) or other immunosuppressive therapy
- Neutropenia (neutrophils < 0.5 G/l).
- Recent chemotherapy or administration of intravenous immunoglobulins within the last 4 weeks.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Innate immune functions of neutrophils
Time frame: 12 months
* Surface expression of receptors of the innate immunity in immature vs. mature neutrophils. * Production by immature vs. mature neutrophils of inflammatory mediators and reactive oxygen species in response to bacterial agonists. * Chemotaxis of immature vs. mature neutrophils. * Phagocytosis of Gram-positive and Gram-negative bacteria by immature vs. mature neutrophils. * Ex vivo viability and resistance to apoptosis of immature vs. mature neutrophils.
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2010.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Geneviève Drifte, MD contact
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Sepsis and SIRS, run by University Hospital, Geneva at 1 site in Switzerland.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 2 Jul 2010. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Switzerland. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Geneviève Drifte, MD (genevieve.drifte@unige.ch), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Innate immune functions of neutrophils (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jul 2010.