- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT00585637
Vitamin D for Chemoprevention
18. marts 2015 opdateret af: Kimmie Ng, MD, Dana-Farber Cancer Institute
Defining Optimal Doses of Vitamin D for Chemoprevention in Blacks.
This study will help us know the effects of Vitamin D pills in Blacks.
The results of this study may be the first step in creating ways to prevent the risks of colon and prostate cancer.
It will also help us develop ways to reduce colon cancer and prostate cancer among Blacks.
This study will find out if Vitamin D pills can increase Vitamin D to healthy levels in our bodies.
Studieoversigt
Status
Afsluttet
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
- Participants will be asked to answer some questions about their diet, exercise and health. In addition, participants blood pressure will be taken. These assessments will occur at baseline, 3- and 6-month appointments. At baseline only, we will measure skin tone with a tool called the Photovolt 577.
- A small blood sample will be taken to see how much Vitamin D is the body and will also look at levels of other markers of disease such as proteins, hormones, and genes.
- Participants will take a vitamin pill every day for three months and be randomly assigned to one of four different types of pills.
- Participants will be called or visited at least every two weeks. They will be asked questions to determine if they have any side effects associated with high levels of Vitamin D.
- At the beginning of the second and third months, participants will be provided with more pills. At the end of the third month, another blood sample will be taken. Three months after that, the final blood sample will be taken.
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
328
Fase
- Fase 1
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
-
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Massachusetts
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Boston, Massachusetts, Forenede Stater, 02115
- Dana-Farber Cancer Institute
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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
30 år til 80 år (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ja
Køn, der er berettiget til at studere
Alle
Beskrivelse
Inclusion Criteria:
- Between the ages of 30 and 80 years
- Comfortable communicating in English
- Currently has a primary care physician
- Willing to discontinue vitamin D or calcium supplements
- Willing to have all protocol specific tests run
Exclusion Criteria:
- Plans on taking a vacation or travel to a sunny region within 3 months of vitamin supplementation period except for a short period (i.e. 1 weekend)
- Pregnant or breast feeding or planning on becoming pregnant in the following year
- Pre-existing calcium (including hypercalcemia), parathyroid conditions (including hyperparathyroidism), sarcoidosis
- No concurrent active malignancies (other than non-melanoma skin cancer) or previous diagnosis of prostate cancer
- Cognitively impaired
- Active thyroid disease (e.g. Graves, Hashimoto's or thyroiditis)
- History of nephrolithiasis, chronic liver disease, chronic renal disease, or renal dialysis
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Enkelt gruppeopgave
- Maskning: Firedobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
---|---|
Aktiv komparator: 1
No Vitamin D
|
Placebo pill taken once daily for 3 month
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Aktiv komparator: 2
1000 IU of Vitamin D
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Taken orally every day for three months
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Aktiv komparator: 3
2000 IU of Vitamin D
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Taken orally every day for three months
|
Aktiv komparator: 4
4000 IU of Vitamin D
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Taken orally every day for three months
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
Levels of Plasma 25(OH)D at Baseline, 3 Months and 6 Months.
Tidsramme: Baseline, 3months, 6months
|
Among Blacks, identify a dose of oral vitamin D supplementation that will result in levels of plasma 25(OH)D that would be predicted to reduce colorectal cancer incidence.
Community-based African Americans drawn from the Open Doors to Health, which is a colorectal cancer prevention study in 1554 subjects from 12 public-housing communities and community- and faith-based organizations in Boston.
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Baseline, 3months, 6months
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
Change in IL-6 From 0 to 3 Months.
Tidsramme: From baseline to 3 months
|
Examine the influence of oral vitamin D supplementation on inflammatory marker IL-6 from baseline to the 3 month follow-up.
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From baseline to 3 months
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Change in IL-10 From 0 to 3 Months.
Tidsramme: From baseline to 3 months
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Examine the influence of oral vitamin D supplementation on inflammatory marker IL-10 from baseline to the 3 month follow-up.
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From baseline to 3 months
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Change in sTNF-R2 From 0 to 3 Months.
Tidsramme: From baseline to 3 months
|
Examine the influence of oral vitamin D supplementation on inflammatory marker sTNF-R2 from baseline to the 3 month follow-up.
|
From baseline to 3 months
|
Change in CRP From 0 to 3 Months.
Tidsramme: From baseline to 3 months
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Examine the influence of oral vitamin D supplementation on inflammatory marker CRP from baseline to the 3 month follow-up.
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From baseline to 3 months
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Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Samarbejdspartnere
Efterforskere
- Ledende efterforsker: Edward Giovannucci, MD, ScD, Harvard School of Public Health/Brigham and Women's Hospital
- Studieleder: Gary G Bennett, PhD, Dana-Farber Cancer Institute
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
- Chandler PD, Scott JB, Drake BF, Ng K, Forman JP, Chan AT, Bennett GG, Hollis BW, Giovannucci EL, Emmons KM, Fuchs CS. Risk of hypercalcemia in blacks taking hydrochlorothiazide and vitamin D. Am J Med. 2014 Aug;127(8):772-8. doi: 10.1016/j.amjmed.2014.02.044. Epub 2014 Mar 20.
- Ng K, Scott JB, Drake BF, Chan AT, Hollis BW, Chandler PD, Bennett GG, Giovannucci EL, Gonzalez-Suarez E, Meyerhardt JA, Emmons KM, Fuchs CS. Dose response to vitamin D supplementation in African Americans: results of a 4-arm, randomized, placebo-controlled trial. Am J Clin Nutr. 2014 Mar;99(3):587-98. doi: 10.3945/ajcn.113.067777. Epub 2013 Dec 24.
- Chandler PD, Scott JB, Drake BF, Ng K, Manson JE, Rifai N, Chan AT, Bennett GG, Hollis BW, Giovannucci EL, Emmons KM, Fuchs CS. Impact of vitamin D supplementation on inflammatory markers in African Americans: results of a four-arm, randomized, placebo-controlled trial. Cancer Prev Res (Phila). 2014 Feb;7(2):218-25. doi: 10.1158/1940-6207.CAPR-13-0338-T. Epub 2013 Dec 10.
- Chandler PD, Agboola F, Ng K, Scott JB, Drake BF, Bennett GG, Chan AT, Hollis BW, Emmons KM, Fuchs CS, Giovannucci EL. Reduction of Parathyroid Hormone with Vitamin D Supplementation in Blacks: A Randomized Controlled Trial. BMC Nutr. 2015;1:26. doi: 10.1186/s40795-015-0024-8. Epub 2015 Dec 17.
- Chandler PD, Giovannucci EL, Scott JB, Bennett GG, Ng K, Chan AT, Hollis BW, Emmons KM, Fuchs CS, Drake BF. Null association between vitamin D and PSA levels among black men in a vitamin D supplementation trial. Cancer Epidemiol Biomarkers Prev. 2014 Sep;23(9):1944-7. doi: 10.1158/1055-9965.EPI-14-0522. Epub 2014 Jun 28.
- Forman JP, Scott JB, Ng K, Drake BF, Suarez EG, Hayden DL, Bennett GG, Chandler PD, Hollis BW, Emmons KM, Giovannucci EL, Fuchs CS, Chan AT. Effect of vitamin D supplementation on blood pressure in blacks. Hypertension. 2013 Apr;61(4):779-85. doi: 10.1161/HYPERTENSIONAHA.111.00659.
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
1. oktober 2007
Primær færdiggørelse (Faktiske)
1. oktober 2010
Studieafslutning (Faktiske)
1. december 2013
Datoer for studieregistrering
Først indsendt
24. december 2007
Først indsendt, der opfyldte QC-kriterier
2. januar 2008
Først opslået (Skøn)
3. januar 2008
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
1. april 2015
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
18. marts 2015
Sidst verificeret
1. marts 2015
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Sygdomme i fordøjelsessystemet
- Hjerte-kar-sygdomme
- Karsygdomme
- Neoplasmer
- Neoplasmer efter sted
- Neoplasmer i fordøjelsessystemet
- Gastrointestinale sygdomme
- Forhøjet blodtryk
- Gastrointestinale neoplasmer
- Lægemidlers fysiologiske virkninger
- Mikronæringsstoffer
- Vitaminer
- Knogletæthedsbevarende midler
- D-vitamin
Andre undersøgelses-id-numre
- 07-342
- P15192 (Anden identifikator: Harvard School of Public Health)
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 .
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