- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT01288950
Vitamin D Supplementation Enhances Immune Response to Bacille-Calmette-Guerin (BCG) Vaccination in Infants (BCG-25-D)
Vitamin D Supplementation Enhances Immune Response to BCG Vaccination in Infants
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
In 2000, there were an estimated 884,000 cases of tuberculosis (TB) in children with many developing severe, disseminated disease. Widespread immunization with Bacille-Calmette-Guerin (BCG) vaccine has not been effective in preventing primary TB infection or in halting the progression from latent to active disease. Poor vaccine efficacy has prompted investigators to develop novel TB vaccines and to experiment with enhancing the immune response to the current BCG vaccine.
Increasing data indicate that children with low vitamin D levels and specific genetic variants that lower functional levels of vitamin D are at increased risk for severe tuberculosis. Elegant studies investigating Mycobacterium tuberculosis (Mtb) infection have shown that mycobacteria are able to reside in endosomes within macrophages by preventing endosome-lysosome fusion; a critical step in autophagy, a cellular process used to recycle cytoplasmic organelles and proteins, and to degrade microbial organisms including Mtb. In-vitro studies have shown that vitamin D increases autophagy and triggers the production of antimicrobial peptides including cathelicidin. This leads to increased intracellular killing of Mtb and increased Mtb antigen presentation to the immune system. Anti-tuberculous vaccines that over-express Mtb antigens generate a stronger immune response than wild type BCG vaccine.
The investigators hypothesis is that a single oral dose of vitamin D3 (cholecalciferol) given to infants prior to BCG administration will enhance the immune response to vaccination through improved MHC class I and class II presentation of the vaccine.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
Baja California
-
Tijuana, Baja California, Mexico
- Tijuana General Hospital
-
-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Healthy mothers > 18 years of age
- Term, healthy infants eligible to receive the Bacille-Calmette- Guerin (BCG) vaccine
Exclusion Criteria:
- Recent maternal history of tuberculosis (within 1 year) or active tuberculosis
- Known maternal human immuno-deficiency virus (HIV) infection
- Maternal fever or chorio-amnionitis
- Maternal use of vitamin D, steroids or immuno-regulatory medications
- Household member with active tuberculosis
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Dobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Ingen indgriben: Placebo
|
|
|
Eksperimentel: Vitamin D3
|
A single oral dose of 50,000 IU of vitamin D3 (cholecalciferol) will be given prior to Bacille-Calmette-Guerin (BCG) vaccination
Andre navne:
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Bacille-Calmette-Guerin (BCG) vaccine efficacy
Tidsramme: 2 months
|
BCG vaccine efficacy will be assessed by measuring the host immune response against BCG at 2 months, 6 months and one year after BCG immunization.
A whole blood assay will be used to measure multiple cytokines and mycobacterial growth suppression.
|
2 months
|
|
Bacille-Calmette-Guerin (BCG) vaccine efficacy
Tidsramme: 6 months
|
6 months
|
|
|
Bacille-Calmette-Guerin (BCG) vaccine efficacy
Tidsramme: 1 year
|
1 year
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Effect of a single dose of 50,000 IU vitamin D3 on serum vitamin D levels
Tidsramme: 2 months
|
Serum 25 hydroxy (OH) vitamin D levels will be measured prior to vitamin D supplementation and at 2 months, 6 months and one year after BCG immunization.
The investigators will also determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect baseline vitamin D levels and alter the response to vitamin D supplementation.
|
2 months
|
|
Bacille-Calmette-Guerin (BCG) vaccine efficacy
Tidsramme: 1 year
|
The investigators will determine whether specific host genetic variants including the Fok-I(rs2228570T/C), Bsm-I(rs1544410A/G), GC(rs2282679A/C), DHCR7(rs12785878G/T) and CYP2R1 (rs10741657A/G) polymorphisms affect the response to BCG vaccine in infants receiving either vitamin D or placebo.
|
1 year
|
Samarbejdspartnere og efterforskere
Samarbejdspartnere
Efterforskere
- Studiestol: Stephen Spector, MD, University of California, San Diego
- Ledende efterforsker: Amaran Moodley, M.D, University of California, San Diego
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Infektioner
- Bakterielle infektioner
- Bakterielle infektioner og mykoser
- Gram-positive bakterielle infektioner
- Actinomycetales infektioner
- Mycobacterium infektioner
- Tuberkulose
- Lægemidlers fysiologiske virkninger
- Mikronæringsstoffer
- Knogletæthedsbevarende midler
- Calciumregulerende hormoner og midler
- D-vitamin
- Cholecalciferol
- Vitaminer
- Ergocalciferoler
Andre undersøgelses-id-numre
- NR-0138
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 Tuberkulose
-
Nagasaki UniversityIkke rekrutterer endnuTuberkulose | Mycobacterium Tuberculosis | LungetuberkuloserKenya
-
University Children's Hospital BaselUniversity Hospital, Geneva; University Hospital Inselspital, Berne; Kantonsspital... og andre samarbejdspartnereRekrutteringTuberkulose | Mycobacterium TuberculosisSchweiz
-
National Institute of Allergy and Infectious Diseases...AfsluttetMycobacterium TuberculosisBrasilien
-
The University of Texas Health Science Center,...National Institute of Allergy and Infectious Diseases (NIAID)AfsluttetMycobacterium TuberculosisForenede Stater, Colombia, Mexico
-
National Institute of Allergy and Infectious Diseases...Aktiv, ikke rekrutterendeOpportunistiske infektioner | Mycobacterium Tuberculosis | Ikke-tuberkuløse mykobakterierThailand, Kina, Taiwan
-
Johns Hopkins UniversityAfsluttetMycobacterium TuberculosisForenede Stater
-
National Institute of Allergy and Infectious Diseases...Afsluttet
-
Assistance Publique - Hôpitaux de ParisViatris Inc.Ikke rekrutterer endnuAntibiotikaresistens | Mycobacterium Tuberculosis | MDR-TB | Tuberkulose Multi Drug Resistant ActiveFrankrig
-
National Institute of Allergy and Infectious Diseases...Afsluttet
-
François SpertiniUniversity of OxfordAfsluttetTuberkulose | Mycobacterium Tuberculosis, Beskyttelse modSchweiz
Kliniske forsøg med Vitamin D3 (cholecalciferol)
-
Medical University of South CarolinaThrasher Research FundAfsluttetD-vitamin mangel | GraviditetForenede Stater
-
Medical University of South CarolinaEunice Kennedy Shriver National Institute of Child Health and Human Development... og andre samarbejdspartnereAfsluttet
-
Brigham and Women's HospitalNational Heart, Lung, and Blood Institute (NHLBI)Afsluttet
-
Medical University of South CarolinaEunice Kennedy Shriver National Institute of Child Health and Human Development...Afsluttet
-
University of California, San FranciscoAfsluttetColitis ulcerosa (UC) | Crohns sygdom (CD)Forenede Stater
-
Terry PonichIkke rekrutterer endnuDen potentielle forbedrede D -vitaminundersøgelse til patienter med inflammatorisk tarmsygdom (PIVD)Crohns sygdom (CD) | Colitis ulcerosa (UC) | IBD (inflammatorisk tarmsygdom)Canada
-
National Institute of Allergy and Infectious Diseases...Autoimmunity Centers of ExcellenceAfsluttetSystemisk lupus erythematosusForenede Stater
-
Atlanta VA Medical CenterAfsluttetD-vitamin mangel | Kronisk nyresygdomForenede Stater
-
University of PittsburghNational Heart, Lung, and Blood Institute (NHLBI)AfsluttetCystisk fibrose | Allergisk bronkopulmonal aspergilloseForenede Stater
-
Lagos State UniversityLagos State University Teaching Hospital (LASUTH)RekrutteringNeuroinflammation | Patienter med traumatisk hjerneskade (TBI).Nigeria