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Immune Parameters in the Cord Blood of Newborns Exposed to Malaria in the Womb

30. juni 2017 opdateret af: National Institute of Allergy and Infectious Diseases (NIAID)

Profiling Immunological Parameters in the Cord Blood of Neonates Exposed to Plasmodium Falciparum in Utero

This study, conducted by the Malaria Research and Training Center at the University of Bamako, Mali, and the NIAID, will examine how exposure to the malaria parasite in the womb affects the developing immune system of newborns. Little is known about how such exposure in the womb may affect the immune system or alter the risk of malaria or responsiveness to vaccination after birth. A better understanding of this process may provide information useful for childhood vaccination strategies in areas where malaria is widespread.

Women 18 years of age and older who live in Bancoumana and are in their last trimester of pregnancy and in good health may be eligible for this study.

Participants have blood samples drawn from a finger stick and through a needle placed in a vein two times for this study: when they enroll in the study and again when they go to the Bancoumana Health Center to deliver their baby. After the baby and placenta are delivered, blood is collected from the umbilical cord and placenta.

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Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

In malaria endemic areas the fetus is at risk for in utero exposure to Plasmodium falciparum or its soluble products. Little is known about how this exposure modulates the developing fetal immune system, or how this may alter the risk of malaria or responsiveness to vaccination after birth. A clearer understanding of this process may inform childhood vaccination strategies in malaria endemic areas. The objective of this cross-sectional exploratory study is to define the immune profile associated with in utero exposure to P. falciparum by analyzing cord blood samples collected at a site of high malaria transmission in Mali, and to compare this profile to that of U.S. cord blood samples. Pregnant women will be invited to participate in this study during the 3rd trimester of pregnancy. A finger stick blood draw will be collected from the mother at enrollment and peri-partum to determine if she is infected with P. falciparum. Cord blood and placental blood samples will be collected post-partum and processed to obtain mononuclear cells and serum. Cord blood can be obtained from the placenta after delivery without risk to mother or infant and will be used for research purposes only. Mononuclear cells will be analyzed by flow cytometry to characterize subsets of B, T and innate immune cells. Functional assays such as the B and T cell ELISPOT assay and measurements of cytokines in response to in vitro stimulation will also be performed.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

120

Kontakter og lokationer

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

Studiesteder

  • Mali
      • Bamako, Mali
        • Malaria Research and Training Center

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

18 år til 99 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

  • INCLUSION CRITERIA:
  • Age greater than or equal to 18 years
  • Healthy female in 3rd trimester of pregnancy
  • Resident of Bancoumana
  • Willingness to allow cord and placental blood samples to be stored and used for future studies of the immune response to malaria
  • Ability to give informed consent and willingness to comply with study requirements and procedures

EXCLUSION CRITERIA:

  • Currently taking corticosteroids or other immunosuppressants
  • Underlying heart disease, bleeding disorder, or other condition that in the judgment of the Principal Investigator (PI) could increase the risk to the volunteer
  • Fever greater than or equal to 37.5 degree C or evidence of an acute infection
  • Anemia (hemoglobin less than 9 g/dL)
  • Participation in another clinical protocol that requires the administration of an experimental vaccine or experimental treatment.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Samarbejdspartnere og efterforskere

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

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

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

8. oktober 2008

Studieafslutning

10. september 2010

Datoer for studieregistrering

Først indsendt

11. oktober 2008

Først indsendt, der opfyldte QC-kriterier

11. oktober 2008

Først opslået (Skøn)

15. oktober 2008

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

2. juli 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. juni 2017

Sidst verificeret

10. september 2010

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 999909004
  • 09-I-N004

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Malaria

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Sponsorer og samarbejdspartnere

Medicinske tilstande

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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