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Trial registered on ANZCTR
Registration number
ACTRN12611000648921
Ethics application status
Approved
Date submitted
22/06/2011
Date registered
24/06/2011
Date last updated
23/05/2012
Type of registration
Prospectively registered
Titles & IDs
Public title
The Vitamin D and Psoriasis Study
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Scientific title
In patients with psoriasis vulgaris, can supplementation with vitamin D3 improve psoriasis as measured by Psoriasis Area and Severity Index score?
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Secondary ID [1]
262431
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Nil
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Psoriasis vulgaris
268121
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Condition category
Condition code
Skin
268269
268269
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0
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Dermatological conditions
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Diet and Nutrition
268270
268270
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0
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Other diet and nutrition disorders
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Human Genetics and Inherited Disorders
268271
268271
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0
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Other human genetics and inherited disorders
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
200,000 IU of vitamin D3 in capsule form at baseline, then 1 x 100,000 IU per month for the next 11 months.
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Intervention code [1]
266805
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Treatment: Other
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Comparator / control treatment
Inactive placebo capsule, identical in taste and appearance to treatment but with no vitamin D3. Two capsules at baseline then then one capsule per month for the next 11 months.
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Control group
Placebo
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Outcomes
Primary outcome [1]
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Change in Psoriasis Area and Severity Index (PASI) scores in treatment group compared to placebo group.
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Assessment method [1]
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Timepoint [1]
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Baseline, 3 months, 6 months, 9 months and 12 months.
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Primary outcome [2]
268995
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Change in serum 25(OH)D levels and PASI scores according to different vitamin D receptor genetic polymorphisms.
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Assessment method [2]
268995
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Timepoint [2]
268995
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Baseline, 3 months, 6 months, 9 months and 12 months.
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Secondary outcome [1]
276771
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Quality of life as assessed using the Dermatology Life Quality Index questionnaire.
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Assessment method [1]
276771
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Timepoint [1]
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Baseline, 3 months, 6 months, 9 months and 12 months.
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Secondary outcome [2]
276772
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Change in inflammatory marker levels in the treatment group compared to the placebo group.
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Assessment method [2]
276772
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Timepoint [2]
276772
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Baseline, 3 months, 6 months, 9 months and 12 months.
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Eligibility
Key inclusion criteria
Medically diagnosed psoriasis vulgaris
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Smoking; chronic kidney or liver disease; currently taking vitamin D supplements, or have taken them within the past two months; pregnant or lactating, or planning to be in the near future; have commenced a new psoriasis treatment within the past three months and wish to continue
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
1/05/2012
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
100
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Accrual to date
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Final
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Recruitment outside Australia
Country [1]
3638
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New Zealand
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State/province [1]
3638
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Funding & Sponsors
Funding source category [1]
267279
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University
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Name [1]
267279
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Massey University
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Address [1]
267279
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Private Bag 102904
North Shore
Auckland 0745
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Country [1]
267279
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New Zealand
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Funding source category [2]
285305
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Government body
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Name [2]
285305
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Lottery Health Research
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Address [2]
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C/- Department of Internal Affairs
Level 7, 22 The Terrace
Wellington 6011
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Country [2]
285305
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New Zealand
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Primary sponsor type
University
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Name
Massey University
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Address
Private Bag 102904
North Shore
Auckland 0745
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Country
New Zealand
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Secondary sponsor category [1]
266339
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None
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Name [1]
266339
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Address [1]
266339
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Country [1]
266339
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
269274
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Health and Disability Ethics Committee - Northern X Regional
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Ethics committee address [1]
269274
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Private Bag 92522 Wellesley St, Auckland 1141
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Ethics committee country [1]
269274
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New Zealand
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Date submitted for ethics approval [1]
269274
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28/06/2011
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Approval date [1]
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16/01/2012
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Ethics approval number [1]
269274
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Summary
Brief summary
Psoriasis is a common, non-infectious inflammatory disease of the skin for which there is no known cure. This condition can have a profound negative effect on quality of life, both physically and psychologically. All existing treatments have significant drawbacks, including increased risk of infection and cancers. Many of the known functions of vitamin D oppose the symptoms of psoriasis, including reducing inflammation, cell overgrowth and immune response. In addition, vitamin D is the most likely therapeutic agent in some topical creams and UVB light therapy. We propose that supplementation of vitamin D in psoriasis patients will increase and maintain vitamin D levels and consequently reduce psoriasis symptoms in a similar manner to UVB and topical treatments, but without the risks, side effects or inconvenience. One hundred men and women with psoriasis will be recruited for a randomised, double-blind, placebo-controlled trial. Subjects will be matched for severity and randomised into active and placebo groups. They will attend five appointments over a one year period, during which they will take vitamin D or placebo, and be assessed for vitamin D status, levels of other relevant biomarkers, change in extent of psoriasis, body composition, and quality of life. We will also investigate whether there are any interactions between different vitamin D receptor genes and response to vitamin D. It is hypothesised that those taking vitamin D will show an improvement in psoriasis alongside an increase in vitamin D levels compared to those on the placebo, and that there will be a relationship between at least one vitamin D receptor genetic variation and response to vitamin D.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
32765
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Address
32765
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Country
32765
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Phone
32765
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Fax
32765
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Email
32765
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Contact person for public queries
Name
16012
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Michelle Ingram
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Address
16012
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c/ Massey University
IFNHH
Private Bag 102 904
North Shore
Auckland 0745
New Zealand
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Country
16012
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New Zealand
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Phone
16012
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+64 9 414 0800 xtn 41173
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Fax
16012
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Email
16012
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[email protected]
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Contact person for scientific queries
Name
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Dr Pamela von Hurst
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Address
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c/ Massey University
IFNHH
Private Bag 102 904
North Shore
Auckland 0745
New Zealand
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Country
6940
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New Zealand
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Phone
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+64 9 414 0800 xtn 41205
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Fax
6940
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Email
6940
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
Source
Title
Year of Publication
DOI
Embase
Vitamin D Signaling in Psoriasis: Pathogenesis and Therapy.
2022
https://dx.doi.org/10.3390/ijms23158575
N.B. These documents automatically identified may not have been verified by the study sponsor.
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