Melasma Clinical Trial
Official title:
A Double Blind Randomized Study Comparing the Ultraviolet (UV) Photoprotection With UV Plus Visible Light Photoprotection in the Treatment of Melasma.
Verified date | December 2014 |
Source | Universidad Autonoma de San Luis Potosí |
Contact | n/a |
Is FDA regulated | No |
Health authority | Mexico: Ministry of Health |
Study type | Interventional |
Melasma is an acquired discoloration of the skin characterized by brown colour changes commonly on the face. The duration of this double-blind clinical trial will be 12 weeks. The control group will receive treatment with topical Hydroquinone (4%) and a Broad spectrum UV sunscreen. The experimental group, 4% topical hydroquinone and a Broad spectrum UV-visible light sunscreen. Visible light has melanotic properties and avoiding it can be part of the treatment for melasma patients. The estimated number of subjects to be recruited and randomized for the study is at least 25 per group. The purpose of this study is determine if there is a difference in the improvement between these two sunscreens types. Melasma Area and Severity Index (MASI) score will be assessed at the beginning of the study and at weeks 4, 8, and 12. Photographs, colorimetry and histological assessment will be also evaluated. Occurrence of adverse effects will also be recorded.
Status | Completed |
Enrollment | 68 |
Est. completion date | November 2013 |
Est. primary completion date | October 2013 |
Accepts healthy volunteers | No |
Gender | Female |
Age group | 25 Years to 60 Years |
Eligibility |
Inclusion Criteria: - Signed informed consent - Women over 25 years of age - Dermatologic diagnostic of melasma - Phototype III or more Exclusion Criteria: - Pregnant or breastfeeding - Postbirth, abortion in the past 6 months - Having an endocrine or autoimmune disease - Under hormonal therapy of any kind including contraceptives or it´s use in the past 6 months - Currently under treatment for melasma including sunscreens - Currently under radiation therapy, chemotherapy, immunosuppressants of any kind or phototherapy or it´s use in the past 6 months - Having used or are consuming photosensitizing substances, oral or topical |
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
Mexico | Dermatology Department. Hospital Central "Dr. Ignacio Morones Prieto" | San Luis Potosi |
Lead Sponsor | Collaborator |
---|---|
Universidad Autonoma de San Luis Potosí | Hospital Central "Dr. Ignacio Morones Prieto" |
Mexico,
Espinal-Perez LE, Moncada B, Castanedo-Cazares JP. A double-blind randomized trial of 5% ascorbic acid vs. 4% hydroquinone in melasma. Int J Dermatol. 2004 Aug;43(8):604-7. — View Citation
Hernández-Barrera R, Torres-Alvarez B, Castanedo-Cazares JP, Oros-Ovalle C, Moncada B. Solar elastosis and presence of mast cells as key features in the pathogenesis of melasma. Clin Exp Dermatol. 2008 May;33(3):305-8. doi: 10.1111/j.1365-2230.2008.02724.x. — View Citation
Moncada B, Sahagún-Sánchez LK, Torres-Alvarez B, Castanedo-Cázares JP, Martínez-Ramírez JD, González FJ. Molecular structure and concentration of melanin in the stratum corneum of patients with melasma. Photodermatol Photoimmunol Photomed. 2009 Jun;25(3):159-60. doi: 10.1111/j.1600-0781.2009.00425.x. — View Citation
Navarrete-Solís J, Castanedo-Cázares JP, Torres-Álvarez B, Oros-Ovalle C, Fuentes-Ahumada C, González FJ, Martínez-Ramírez JD, Moncada B. A Double-Blind, Randomized Clinical Trial of Niacinamide 4% versus Hydroquinone 4% in the Treatment of Melasma. Dermatol Res Pract. 2011;2011:379173. doi: 10.1155/2011/379173. Epub 2011 Jul 21. — View Citation
Torres-Álvarez B, Mesa-Garza IG, Castanedo-Cázares JP, Fuentes-Ahumada C, Oros-Ovalle C, Navarrete-Solis J, Moncada B. Histochemical and immunohistochemical study in melasma: evidence of damage in the basal membrane. Am J Dermatopathol. 2011 May;33(3):291-5. doi: 10.1097/DAD.0b013e3181ef2d45. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Depigmentation of melasma lesions by Colorimetry | Quantification of the colour change in the melasma lesions by means of the L axis of the CIE system. 0 value is pure white, 100 value is total black. | 12 weeks | No |
Secondary | MASI (Melasma Area Severity Index) | It is a clinical instrument of melasma measurement. The total score would range from 0-24, involving the forehead (30%), right malar (30%), left malar (30%) and chin (10%), and using area of involvement (0=absent, 1=<10%, 2=10%-29%, 3=30%-49%, 4=50%-69%, 5=70%-89% and 6=90%-100%) and darkness (0=absent, 1=slight, 2=mild, 3=marked and 4=severe). Computation would be as follows: 0.3 A(f) D(f) + 0.3 A(lm) D(lm) + 0.3 A(rm) D(rm) + 0.1 A(c) D(c). | 12 weeks | No |
Secondary | Melanin content by histologic quantification. | The Fontana-Masson Stain is specific for melanin, this histochemical reaction reveals accumulations of black material wherever melanin is located. A skin biopsy of lesions will be taken initially and at the end of study. The melanin content will be quantified by a software image analysis of the slides. | 12 weeks | No |
Secondary | Global Physician Assessment | Clinical improvement is assessed by means of digital photographic registration (frontal, right, and left views). An independent observer clinically graded the global improvement as poor (0-25%), mild (26-50%), good (51-75%), and excellent (>75%). | 12 weeks | No |
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