Single-Blind Study Determining the Efficacy of Polypodium Leucotomos Extract Supplement in Decreasing Ultraviolet A (UVA) Premutagenic and Photoaging Markers (Heliocare)
Recruitment status was: Active, not recruiting
With this study we will like to determine if taking a dose of the study medication, called Polypodium leucotomos (PL), prevents some of the changes in the skin caused by the adverse effects of UVA, a type of ultraviolet light. Ultraviolet light is a form of radiation which is not visible to the human eye. The sun produces different types of ultraviolet radiation, and UVA is one of them. More than 95% of the solar UV energy that reaches our skin is from the UVA type. UVA penetrates cloud cover and glass windows.
PL extract comes from a tropical fern plant grown in Central and South America, and it is a dietary supplement available in the US. No side effects have been reported with Polypodium leucotomos extract since becoming commercially available in 1982. Also, PL extract was approved for oral use by the Institutional Review Board of The Massachusetts General Hospital, Boston, for studies by Harvard Medical School faculty in human volunteers that were carried out for a period of two years, using artificial light and sunlight as ultraviolet sources.
This is an investigator-blinded study, which means that the doctor evaluating you will not know if you are receiving the study medication or not. Another doctor will be supplying you with the medication and discussing any problems that you may have with the medication.
You will be assigned to one of the two treatment groups. The group will be assigned by chance and you will have a one in two chances of receiving either the study medication or no treatment.
|Aging Skin Abnormalities||Drug: Polypodium leucotomos Other: No Treatment||Phase 2|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Basic Science
|Official Title:||Single-Blind Study Determining the Efficacy of Polypodium Leucotomos Extract Supplement in Decreasing UVA Premutagenic and Photoaging Markers|
- H&E study of skin biopsy sample taken from final visit [ Time Frame: 24 hours after Ultraviolet A treatment ]
- PCR determination of common deletion in DNA of skin biopsy sample taken from final visit [ Time Frame: 24 hours after Ultraviolet A treatment ]
- 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) quantification in skin biopsy sample taken from final visit [ Time Frame: 24 hours after Ultraviolet A treatment ]
|Study Start Date:||August 2007|
|Estimated Study Completion Date:||May 2009|
|Estimated Primary Completion Date:||May 2009 (Final data collection date for primary outcome measure)|
Subject is given a 7.5 mg/kg dose of Polypodium leucotomos.
Drug: Polypodium leucotomos
Subject is given a 7.5 mg/kg oral dose of Polypodium leucotomos during Baseline visit, and again at 8 hours and 2 hours before the Follow-up visit #2.
Other Name: Heliocare
No Intervention: 2
Subject is not given any treatment.
Other: No Treatment
Patient is not given any treatment.
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00520910
|United States, Florida|
|University of Miami Skin Research Group Office|
|Miami, Florida, United States, 33136|
|Principal Investigator:||Brian Berman, M.D., Ph.D.||University of Miami, Department of Dermatology and Cutaneous Surgery|