PrematurityNCT00546195
Infant Immune Response to Bacterial Infection
An observational study of Prematurity and Histologic Chorioamnionitis, run by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) at 1 site in United States.
Trial summary
This study will examine the response of white blood cells to bacterial infection in blood taken from the umbilical cords of newly delivered infants. The blood samples will be taken from both male infants who were carried to term and male infants who were born prematurely, and genetic studies will compare these blood… Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Prematurity, Histologic Chorioamnionitis
- How many people
- 45 participants
- Where
- 1 siteUnited States
- Study dates
- 15 Oct 2007to 29 Mar 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 Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Chinese pregnant women admitted to the labor ward of the Prince of Wales hospital.
- Normal spontaneous delivery.
Who cannot join
- Patient diagnosed with known infectious diseases such as HIV and HBV positive cases (blood precautions).
- Patients are incompetent to consent such as being mentally retarded or mentally ill and without an impairment of judgment at the time of consenting.
- Patients who do not consent.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institute of Child Health and Human Development (NICHD), 9000 Rockville
Bethesda, Maryland, 20892
About this study
Official title: Expression Profiling of Bacterial Lipopolysaccharide Activated Neutrophil in Pre-Term, Term Infants and Adults
This study will examine the response of white blood cells to bacterial infection in blood taken from the umbilical cords of newly delivered infants. The blood samples will be taken from both male infants who were carried to term and male infants who were born prematurely, and genetic studies will compare these blood samples to samples drawn from healthy adult male volunteers. The study is designed to look at the ways in which the immune systems of newborn infants respond to bacterial infection.
Participants in this study will be pregnant Chinese women admitted to the labor ward of the Prince of Wales Hospital (Sha Tin district of New Territories, Hong Kong SAR) for normal spontaneous delivery. Those with known blood-borne infectious diseases such as HIV and hepatitis B will be excluded from this study.
Cord blood and placenta samples will be collected after the completion of delivery. The samples collected for this study will be restricted to male newborns. A comparison group of blood samples will be drawn from healthy male adults between 25 and 35 years of age....
Read the detailed description
Bacterial infection in preterm neonates is a significant clinical problem. Neutrophils play a critical role in the bactericidal process, which is immature in newborns though their peripheral blood neutrophil counts are similar to or higher than that of older children and adults. The use of steroids to enhance lung maturation in premature infants complicates this problem. Many studies have shown different biological activities between lipopolysaccharide (LPS) activated neonatal cord blood neutrophils and adult peripheral blood neutrophils. In spite of a number of previous studies, the genetic basis of this differential response to LPS-activation remains unknown. In this study, we will identify the differential gene expression profiles of LPS-activated adult peripheral blood versus cord blood neutrophils from both term and preterm infants by whole genome ligonucleotide microarray. We will investigate the priming effect of histologic chorioamnionitis (HCA), a severe infection/inflammation implicated in many neonatal diseases, on the immune response in neutrophils in terms of gene expression. The effect of prenatal administration of steroids on the immune response in preterm neutrophils is another question we will address in the proposed study. This study will provide insight into the molecular basis for genetic regulation of neutrophil development. We expect to identify novel genes with differential expressions in LPS-activated cord blood neutrophils when compared to those of LPS-activated adult cells. Aberrant transcripts due to the priming effect of HCA to the immune response in term neutrophils will also provide insight on the defense mechanism of subsequent exposures to bacterial infection.
This is a collaborative study. All samples will be collected by our Collaborators at the Chinese University of Hong Kong, Hong Kong. We will perform expression profiling in the Laboratory of Clinical Genomics at NICHD. This protocol has been approved by the Joint Clinical Research Ethics Committee of the Chinese University of Hong Kong and Hospital Authority of Hong Kong.
- Conditions
- Prematurity, Histologic Chorioamnionitis
- Keywords
- Cord Blood, Neutrophils, Polysaccharide, Gene Expression
- Medical subject headings
- Premature Birth
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Oct 2007 (estimated)
- Study start15 Oct 2007
- Study completion29 Mar 2011
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for PrematurityStudies of the same condition, open and under way.
- 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
- Time perspective
- Prospective
- Enrolment
- 45 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00546195
- Sponsor's protocol ID
- 999908011
- Other IDs
- 08-CH-N011
- Status last verified
- 29 Mar 2011
- First submitted
- 17 Oct 2007
- Last updated
- 2 Jul 2017
- Results posted
- No
Publications
Fanaroff AA, Korones SB, Wright LL, Verter J, Poland RL, Bauer CR, Tyson JE, Philips JB 3rd, Edwards W, Lucey JF, Catz CS, Shankaran S, Oh W. Incidence, presenting features, risk factors and significance of late onset septicemia in very low birth weight infants. The National Institute of Child Health and Human Development Neonatal Research Network. Pediatr Infect Dis J. 1998 Jul;17(7):593-8. doi: 10.1097/00006454-199807000-00004.
PubMed 9686724Kylat RI, Ohlsson A. Recombinant human activated protein C for severe sepsis in neonates. Cochrane Database Syst Rev. 2006 Apr 19;(2):CD005385. doi: 10.1002/14651858.CD005385.pub2.
PubMed 16625638Gladstone IM, Ehrenkranz RA, Edberg SC, Baltimore RS. A ten-year review of neonatal sepsis and comparison with the previous fifty-year experience. Pediatr Infect Dis J. 1990 Nov;9(11):819-25. doi: 10.1097/00006454-199011000-00009.
PubMed 2263432
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Expression Profiling of Bacterial Lipopolysaccharide Activated Neutrophil in Pre-Term, Term Infants and Adults
- ClinicalTrials.gov ID
- NCT00546195
- Acronym / sponsor ID
- 999908011
- Conditions
- Prematurity, Histologic Chorioamnionitis
- Keywords
- Cord Blood, Neutrophils, Polysaccharide, Gene Expression
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 45 participants (estimated)
- Lead sponsor
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)US National Institutes of Health
- Study start
- 15 Oct 2007
- Study completion
- 29 Mar 2011
- First posted
- 18 Oct 2007 (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.
This study will examine the response of white blood cells to bacterial infection in blood taken from the umbilical cords of newly delivered infants. The blood samples will be taken from both male infants who were carried to term and male infants who were born prematurely, and genetic studies will compare these blood samples to samples drawn from healthy adult male volunteers. The study is designed to look at the ways in which the immune systems of newborn infants respond to bacterial infection.
Participants in this study will be pregnant Chinese women admitted to the labor ward of the Prince of Wales Hospital (Sha Tin district of New Territories, Hong Kong SAR) for normal spontaneous delivery. Those with known blood-borne infectious diseases such as HIV and hepatitis B will be excluded from this study.
Cord blood and placenta samples will be collected after the completion of delivery. The samples collected for this study will be restricted to male newborns. A comparison group of blood samples will be drawn from healthy male adults between 25 and 35 years of age....
Detailed description
Bacterial infection in preterm neonates is a significant clinical problem. Neutrophils play a critical role in the bactericidal process, which is immature in newborns though their peripheral blood neutrophil counts are similar to or higher than that of older children and adults. The use of steroids to enhance lung maturation in premature infants complicates this problem. Many studies have shown different biological activities between lipopolysaccharide (LPS) activated neonatal cord blood neutrophils and adult peripheral blood neutrophils. In spite of a number of previous studies, the genetic basis of this differential response to LPS-activation remains unknown. In this study, we will identify the differential gene expression profiles of LPS-activated adult peripheral blood versus cord blood neutrophils from both term and preterm infants by whole genome ligonucleotide microarray. We will investigate the priming effect of histologic chorioamnionitis (HCA), a severe infection/inflammation implicated in many neonatal diseases, on the immune response in neutrophils in terms of gene expression. The effect of prenatal administration of steroids on the immune response in preterm neutrophils is another question we will address in the proposed study. This study will provide insight into the molecular basis for genetic regulation of neutrophil development. We expect to identify novel genes with differential expressions in LPS-activated cord blood neutrophils when compared to those of LPS-activated adult cells. Aberrant transcripts due to the priming effect of HCA to the immune response in term neutrophils will also provide insight on the defense mechanism of subsequent exposures to bacterial infection.
This is a collaborative study. All samples will be collected by our Collaborators at the Chinese University of Hong Kong, Hong Kong. We will perform expression profiling in the Laboratory of Clinical Genomics at NICHD. This protocol has been approved by the Joint Clinical Research Ethics Committee of the Chinese University of Hong Kong and Hospital Authority of Hong Kong.
Study design
- Time perspective
- Prospective
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (2 listed)
- Chinese pregnant women admitted to the labor ward of the Prince of Wales hospital.
- Normal spontaneous delivery.
Key exclusion criteria (3 listed)
- Patient diagnosed with known infectious diseases such as HIV and HBV positive cases (blood precautions).
- Patients are incompetent to consent such as being mentally retarded or mentally ill and without an impairment of judgment at the time of consenting.
- Patients who do not consent.
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
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2017.
- Background: PubMed 9686724Fanaroff AA, Korones SB, Wright LL, Verter J, Poland RL, Bauer CR, Tyson JE, Philips JB 3rd, Edwards W, Lucey JF, Catz CS, Shankaran S, Oh W. Incidence, presenting features, risk factors and significance of late onset septicemia in very low birth weight infants. The National Institute of Child Health and Human Development Neonatal Research Network. Pediatr Infect Dis J. 1998 Jul;17(7):593-8. doi: 10.1097/00006454-199807000-00004.
- Background: PubMed 16625638Kylat RI, Ohlsson A. Recombinant human activated protein C for severe sepsis in neonates. Cochrane Database Syst Rev. 2006 Apr 19;(2):CD005385. doi: 10.1002/14651858.CD005385.pub2.
- Background: PubMed 2263432Gladstone IM, Ehrenkranz RA, Edberg SC, Baltimore RS. A ten-year review of neonatal sepsis and comparison with the previous fifty-year experience. Pediatr Infect Dis J. 1990 Nov;9(11):819-25. doi: 10.1097/00006454-199011000-00009.
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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.
The record lists no contact. Use the official record to reach the sponsor.
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 Prematurity and Histologic Chorioamnionitis, run by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) at 1 site in United States.
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 2 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: finished, as of the sponsor's last update on 2 Jul 2017. 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 United States. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00546195, which also lists 3 linked publications.
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 2017.