Plasma Levels of Danger-Associated Molecular Patterns in Young Children After Cardiac Surgery Under Cardiopulmonary Bypass (IMMUNOPED2)

December 9, 2025 updated by: Nantes University Hospital

Plasma Levels of Danger-Associated Molecular Patterns (DAMPs) in Young Children After Cardiac Surgery Under Cardiopulmonary Bypass (IMMUNOPED 2)

The investigators have previously reported that cardiac surgery with CPB ( cardiopulmonary bypass) in young infants induced a drastic reduction in mHLA-DR ( Human Leucocyte Antigen) expression, which represents one of innate immune mediator. Danger-Associated Molecular Patterns (DAMPs) can elicit immune response and may subsequentely induce an immune-suppressed state. The investigators hypothesize that CPB causes excessive DAMP release, leading to the development of immune suppression. Thus, DAMPs release will be assessed in patients undergoing CBP, and consequences on immune suppression will be evaluated.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

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Intervention / Treatment

Intervention / Treatment

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Detailed Description

Plasma levels of heat shock protein (HSP 70), high mobility group box (HMGB1), S100A9 and IL-33 will be measured at four time points (prior to the onset of CPB, Hour 6 postoperative, day 1 and day 3 after surgery). HLA-DR gene expression will be determined before surgery and at day 3 postoperative. The direct effect of DAMPs release and immune suppression will be assessed by in vitro experiments.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
88

Contacts and Locations

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Study Contact

Study Contact

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Study Contact Backup

Study Locations

  • France
      • Nantes, France, 44093
        • Nantes University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

No older than 3 months (Child)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

All patients admitted to pediatric resuscitation at the Nantes University Hospital after cardiac surgery under CEC ( extra-corporal circulation) and aged less than 3 months meeting the criteria for inclusion and non-inclusion of the study will be included. We can objectify the recruitment of 80 patients in total over 3 years.

Since natural evolution (variation of rates and their kinetics) of the secretion of different DAMPs during the first months of life is unknown, the investigators added a control group to know the expression and kinetics of DAMPs outside cardiac surgery under CEC. This control group will be defined by infants under 3 months of age undergoing heavy digestive surgery and having a central venous catheter to facilitate access to blood samples (n = 20).

Description

Inclusion Criteria:

  • Patient admitted to pediatric intensive care at Nantes University Hospital after cardiac surgery with bypass graft
  • Age ≤ 3 months corrected age. Control group: patients less than 3 months old following cardiac surgery without CEC or digestive surgery with a central venous catheter.

Exclusion Criteria:

  • Futility of care with cessation of blood tests as part of a limitation of active therapies;
  • Absence of parents for information
  • Refusal of parents after information (Lack of parental consent)
  • Blood volume collected for medical purposes incompatible with the needs of the research

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

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Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Study population
The study population must correspond to the research inclusion criteria: Patient admitted to pediatric intensive care at Nantes University Hospital after cardiac surgery on bypass grafts
Diagnostic test: Blood drop sampling
For each patient included, 1 additional EDTA blood tube (2 ml) will be collected for research purposes at different times (4 visits), and 1 PAXgene-type tube adapted for pediatric collection of only 500 μl (2 visits).

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Plasma levels of heat shock protein (HSP 70), high mobility group box (HMGB1), S100A9 and IL-33 before and after CBP.
Time Frame: prior to the onset of CPB, 6 hours, day 1 and day 3 after surgery
Change of plasma levels of DAMPs after cardiopulmonary bypass Plasma levels of heat shock protein (HSP 70), high mobility group box (HMGB1), S100A9 and IL-33 before and after CBP.
prior to the onset of CPB, 6 hours, day 1 and day 3 after surgery

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Effect of DAMPs on immune function:In vitro change of HLA-DR expression.
Time Frame: 6 hours after surgery
In vitro change of HLA-DR expression induced by plasma containing different concentrations of DAMPs.
6 hours after surgery
Effect of DAMPs on immune function:Secretion of IL-10 ( Interleukine 10).
Time Frame: 6 hours after surgery
Secretion of IL-10 by different immune cells induced by plasma containing different concentrations of DAMPs.
6 hours after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Nantes University Hospital

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Alexis Chenouard, Nantes University Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 2, 2020

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 27, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 2, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 14, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 7, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 9, 2020

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 17, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 9, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2024

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RC19_0402

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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