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Defining the Intestinal Microbiota in Premature Neonates

30. april 2020 opdateret af: Imperial College London

The Microbiota of the Premature Neonatal Gastrointestinal Tract: Its Development and Relation to Necrotizing Enterocolitis and Bloodstream Infection

The investigators will collect daily faecal samples from premature (<32 weeks) infants in the intensive care unit from the day of birth until they are discharged. By using newly developed molecular detection techniques the investigators aim to define more precisely than has ever previously been attempted, all the species of bacteria present in the faeces. This will enable comparison of the pre-morbid and post-morbid intestinal microbiota (all the bacteria in the gut) in premature neonates.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

Highly premature infants are susceptible to serious infections such as necrotizing enterocolitis (NEC) and late-onset blood stream infections (BSIs).

NEC is a poorly understood, potentially life-threatening bowel disorder. It is thought that bacteria proliferating abnormally in the bowel may play an important part in its cause, but no single pathogen has yet been identified.

BSIs are commonly caused by gut bacteria. As the highly premature gut is fragile and has increased permeability, poor motility and decreased immune defences, localised inflammation caused by abnormal bacterial growth may allow 'bystander' microbes to translocate through the gut into the blood stream leading to systemic infection.

In a small proportion of infants who develop NEC, surgery will be required as part of treatment of the condition. In these infants the investigators will seek consent to collect a small part of the diseased bowel which has been removed. Similar analysis will be performed on these samples. The analysis of the tissue samples will give us an indication of how well the faeces act as a proxy for the intestinal microbiota.

In this ecological study of the evolution of the intestinal microbiota in preterm infants, by comparing samples from babies who develop NEC or late-onset BSI with those of well babies the investigators will be able to look for differences characteristic of the conditions. This information will help aid design of prevention or treatment strategies.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

369

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Det Forenede Kongerige
      • London, Det Forenede Kongerige, W21PG
        • Imperial College London
      • London, Det Forenede Kongerige
        • Queen Charlotte's and Chelsea Hospital - NICU
      • London, Det Forenede Kongerige
        • St. Mary's Hospital - Winnicott Baby Unit

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

Ikke ældre end 7 måneder (Barn)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Premature babies born at less than 32 completed weeks gestation

Beskrivelse

Inclusion Criteria:

  • All premature babies born at less than 32 completed weeks gestation who are admitted to an Imperial College NHS Healthcare Trust Neonatal Intensive Care Unit (St. Mary's Hospital or Queen Charlotte's & Chelsea Hospital), and whose parents/guardians have given their consent will be eligible to enter the study.

Exclusion Criteria:

  • All babies born at more than 32 completed weeks gestation will be excluded from the study.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Premature babies (<32 weeks)
All premature babies born at less than 32 completed weeks gestation who are admitted to an Imperial College NHS Healthcare Trust Neonatal Intensive Care Unit (St. Mary's Hospital or Queen Charlotte's & Chelsea Hospital), and whose parents/guardians have given their consent will be eligible to enter the study.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
The Composition of Bacteria Present, Established by Ultra-deep RNA Gene Sequencing, in Pre-morbid Faecal Samples From Neonates With Necrotizing Enterocolitis and Late-onset Bacterial Sepsis.
Tidsramme: Maximum of 6 months - serial samples collected from each infant (maximum admission duration 6 months), recruitment opened for 24 months.

Faecal samples were analysed using 16S rRNA gene sequencing to determine the bacterial content present in faecal samples collected from pre term infants prior to the onset of necrotising enterocolitis.

Bacteria were identified and relative proportions reported for each faecal sample analysed.
Maximum of 6 months - serial samples collected from each infant (maximum admission duration 6 months), recruitment opened for 24 months.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Imperial College London

Samarbejdspartnere

Chelsea and Westminster NHS Foundation Trust
National Heart and Lung Institute
The Winnicott Foundation

Efterforskere

  • Ledende efterforsker: J Simon Kroll, MA BM FRCP, Imperial College London

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. januar 2011

Primær færdiggørelse (Faktiske)

1. januar 2013

Studieafslutning (Faktiske)

1. juni 2014

Datoer for studieregistrering

Først indsendt

31. marts 2010

Først indsendt, der opfyldte QC-kriterier

12. april 2010

Først opslået (Skøn)

13. april 2010

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

1. maj 2020

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. april 2020

Sidst verificeret

1. april 2020

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • CR01542

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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Placeringer

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