Antibody Secreting Cell and Cyotokine Profiles in Neonates on ECMO

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00371241
Recruitment Status : Completed
First Posted : September 4, 2006
Last Update Posted : December 6, 2007
Memorial Hermann Hospital
Information provided by:
The University of Texas Health Science Center, Houston

Brief Summary:
Infants are placed on ECMO for correction of reversible respiratory failure. Often, because a few of the reasons for respiratory failure show us similar things in the baby, it is difficult to determine exactly which is causing the biggest problem. We are now capable of measuring certain cells and proteins in these infants that may help us more accurately diagnose the exact problem. We hypothesize that infants placed on ECMO will show unique antibody-secreting cells responses and patterns of cytokine and chemokine (protein) response to illness and to the ECMO circuit. If we find unique patterns to these cells or proteins, they may be able to predict outcomes or guide treatment of these infants.

Condition or disease
Persistent Fetal Circulation Syndrome Diaphragmatic Hernia Meconium Aspiration Sepsis

Detailed Description:

Specific Aims Primary Objective

1. Determine the rise, peak, and fall of immunoglobulin isotype-specific ASC's, and immunoactive proteins (cytokines and chemokines) from sequential samples of peripheral blood from infants on ECMO.

Secondary Objectives:

  1. Determine the most appropriate time to sample blood from infants with suspected sepsis for ASC diagnostic assay.
  2. Characterize the incidence of culture-negative sepsis that leads to ECMO.
  3. Determine immunoglobulin isotype-specific levels of ASC in infants with and without infection.
  4. Establish an archive of mononuclear cells and plasma to use in development of pathogen specific ASC assays.

Hypothesis Infants on ECMO will have a high ASC response and unique cytokine/chemokine patterns due to possible underlying infection and exposure to many foreign antigens (blood products, ECMO circuit). A significant portion of these will have ASC's with specificity for common causes of neonatal sepsis that is not detected by routine blood culture.


Residual samples will be collected from those used in routine procedures for infants on ECMO. The approximate volume/sample will be 0.5-0.8ml. Specimens will be processed using methods well established in our laboratory. Briefly, PBMC's will be isolated via Ficoll gradient and archived in liquid nitrogen at -80C. Batch analysis of ASC levels and lymphocyte proliferation activity will be performed when sufficient number of specimens are accumulated. A detailed profile and quantification of immune cells will be determined by Fluorescent Activated Cell Sorter (FACS) staining for CD3, CD4, CD8, CD27, CD38, CD45, and HLA-DR. A bead micro-array will be used to detect levels of immunoactive molecules, also done on the FACS. The proteins detected will include, but may not be limited to, the following: IL1β, IL2, IL4, IL5, IL6, IL7, IL8, IL10, IL12p70, IL13, IL17, GCSF, GMCSF, IFN-γ, MCP-1, MIP-1β, TNFα. The ASC procedure be that established by Van de Verg modified to use membrane surface microculture plates in place of agar with outcomes read by CTL analyzer in place of manual count. LPA assays will use long established techniques.

Study Type : Observational
Actual Enrollment : 12 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Antibody Secreting Cell (ASC) and Immunoactive Protein Profiles in Neonates on Extracorporeal Membrane Oxygenation (ECMO)
Study Start Date : September 2006
Actual Study Completion Date : November 2007

Biospecimen Retention:   Samples With DNA
Plasma and whole blood

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Ages Eligible for Study:   up to 30 Days   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Infants requiring ECMO

Inclusion Criteria:

  • 1) term newborn infants >24 hours and ≤ 30 days old 2) Placed on ECMO in the NICU at MHCH 3) Parental consent obtained within 48 hours of being placed on ECMO

Exclusion Criteria:

  • 1) Infant > 30 days old 2) Infant NOT on ECMO 3) Withdrawal of parental consent

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00371241

United States, Texas
Memorial Hermann Hospital
Houston, Texas, United States, 77030
Sponsors and Collaborators
The University of Texas Health Science Center, Houston
Memorial Hermann Hospital
Principal Investigator: James M Murpy, PhD University of Texas Health Science Center at Houston- Division of Infectious Diseases

Responsible Party: James R. Murphy, The University of Texas Health Science Center, HoustonU Identifier: NCT00371241     History of Changes
Other Study ID Numbers: HSC-MS-06-0122
First Posted: September 4, 2006    Key Record Dates
Last Update Posted: December 6, 2007
Last Verified: December 2007

Keywords provided by The University of Texas Health Science Center, Houston:
extracorporeal membrane oxygenation

Additional relevant MeSH terms:
Hernia, Diaphragmatic
Hernias, Diaphragmatic, Congenital
Meconium Aspiration Syndrome
Persistent Fetal Circulation Syndrome
Pathological Conditions, Anatomical
Congenital Abnormalities
Lung Injury
Lung Diseases
Respiratory Tract Diseases
Respiration Disorders
Fetal Diseases
Pregnancy Complications
Infant, Newborn, Diseases
Hypertension, Pulmonary
Immunologic Factors
Physiological Effects of Drugs