Predictors of Sepsis in Ex-Preterm Infants
The aims of this study are to:
- Assess whether ex-preterm infants have a persistently immature immune system, which may decrease their ability to respond to infections, when they reach term-corrected gestational age.
- Examine whether clinical history, nutrition status, and microbiome composition are linked to the immune composition of term and ex-preterm infants and whether these variables can be used to predict the risk of developing sepsis or having an immunologic disease.
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
Preterm infants have increased numbers of viral infections in childhood. They are also more likely to die from infection during the neonatal and infant periods than infants born at term. While studies have demonstrated that premature infants have decreased adaptive and innate immune responses compared with infants born at term, there has been little investigation into whether this impaired immunity improves and becomes similar to full term infants once the ex-preterm infants reach term-corrected gestational age. There have likewise not been studies to determine whether specific immune markers may predict the risk of developing sepsis. Given the immaturity of the preterm immune system and the many potential infectious and inflammatory insults they are exposed to during the preterm period (infections, poor nutrition, stress, steroid therapy), there is also a possibility that the relative immune deficiency experienced by preterm infants may persist into infancy.
The goal of this study is to determine whether former preterm infants have sustained differences in immunity compared to age-matched controls, which would have significant implications for infection risk and response to vaccination. Additionally, this study hopes to examine whether certain immune system abnormalities make certain babies more likely to have a serious infection. The present study will assess composition and function of T and B cell compartments in preterm and former preterm infants.
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
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Massachusetts
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Boston, Massachusetts, Forenede Stater, 02115
- Boston Children's Hospital
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria Ex-Preterm Infant Group:
- Infants born less than 37 weeks gestational age
Exclusion Criteria for Ex-Preterm Infant Group:
- Infants born greater than 37 weeks gestational age
Inclusion Criteria for Term Infant Group:
- Infants born greater than 37 weeks gestational age
Exclusion Criteria for Term Infant Group:
- Infants born less than 37 weeks gestational age
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
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Preterm Infants
Blood samples will be obtained from preterm and former preterm infants at birth and then monthly until hospital discharge.
The sample would consist of either up to 0.5ml of blood obtained during a requested clinical blood draw, discarded blood, or a dried blood spot specimen.
If no discard samples are available and study blood samples need to be obtained instead, this will occur for a maximum period of 6 months and no more than 3ml of blood will be collected over the entire study period.
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Term Infants
Blood samples will be obtained from term control infants admitted to the NICU monthly until hospital discharge.
The sample would consist of either up to 0.5ml of blood obtained during a requested clinical blood draw, discarded blood, or a dried blood spot specimen.
If no discard samples are available and study blood samples need to be obtained instead, this will occur for a maximum period of 6 months and no more than 3ml of blood will be collected over the entire study period.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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The presence or absence of skewed or altered immune profile in preterm infants compared to infants born at term.
Tidsramme: Up to 1 year
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The present study will assess composition and function of T and B cell compartments in preterm and former preterm infants.
Whole blood samples will be separated into serum and cellular components and sera will be used to assess cytokine predominance and measure nutritional markers.
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Up to 1 year
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Determining whether non-modifiable variables of nutrition status, microbiome composition, or immune repertoire composition predict risk of developing infection during the hospitalization.
Tidsramme: Up to 1 year
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The investigators will measure nutritional status.
Whole blood samples will be separated into serum and cellular components and sera will be used to assess cytokine predominance and measure nutritional markers.
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Up to 1 year
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Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: Amy O'Connell, MD, Boston Children's Hospital
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- IRB-P00023454
Plan for individuelle deltagerdata (IPD)
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