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Sponsored by: |
National Taiwan University Hospital |
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Information provided by: | National Taiwan University Hospital |
ClinicalTrials.gov Identifier: | NCT00155584 |
Photodynamic therapy (PDT) has been developed as a promising new cancer treatment modality, which involves the uptakes of a photosensitizer by tumor cells, followed by the activation of photosensitizer with approximate wavelength of light. The mechanisms of the PDT-induced cytotoxic effect relate to singlet oxygen and other reactive oxygen intermediates generated by PDT, which give rise to cellular stress and cause cell death. Previously, using the homemade LED light source, we have shown that ALA-PDT is effective for the treatment of premalignant lesions such as mucosal dysplasia and carcinoma in situ of oral cavity. Due to the advantages of low cost, high reliability, and portability, LED light source provides an alternative approach for the light irradiation of PDT.
Verruca vulgaris are benign skin papillomas caused by the human papilloma virus (HPV). They are very common and can affect many different sites including the face, hands, feet and genitalia. Although the present therapeutic approaches are more or less effective in eradicating the lesions, relapses are very common. Furthermore, at times the anatomical location and depth of lesions often make the treatment difficult, time-consuming and painful. Therefore, it is necessary to develop new modalities for wart treatment.
The purpose of this clinical trial is to develop topical ALA-PDT as an alternative treatment of wart but without the unwanted side effects of pain and burning. To fulfill this goal, the following works will be performed. First, topical ALA formulation and LED array will be specifically designed and developed for the skin lesions. Second, the efficacy of the ALA formulation designed for wart treatment will be evaluated with in vivo fluorescence imaging system. Third, the therapeutic efficacy of ALA-PDT will be evaluated by using a LED array designed for skin irradiation. Forth, the unwanted side effects of pain and burning will be further compared between red and green LED array.
Study Type: | Observational |
Study Design: | Natural History, Longitudinal, Random Sample, Prospective Study |
Official Title: | Topical 5-Aminolevulinic Acid Photodynamic Therapy for the Treatment of Verruca Vulgaris: Comparison of Red and Green Light-Emitting Diode Array |
Estimated Enrollment: | 80 |
Study Start Date: | December 1994 |
Estimated Study Completion Date: | December 1996 |
Verruca vulgaris or warts are benign skin papillomas caused by the human papilloma virus (HPV). They are very common and can affect many different sites including the face, hands, feet and genitalia. Although the present therapeutic approaches are more or less effective in eradicating the lesions, scars and relapses are very common. Furthermore, at times the anatomical location and depth of lesions often make the treatment difficult, time-consuming and painful. Therefore, it is necessary to develop new modalities for wart treatment.
Photodynamic therapy (PDT) has been developed as a promising new cancer treatment modality, which involves the uptakes of a photosensitizer by tumor cells, followed by the activation of photosensitizer with approximate wavelength of light. The endogenous conversion of 5-aminolevulinic acid (ALA) to protoporphyrin IX (PpIX) has broadened the use of PDT. The mechanisms of the PDT-induced cytotoxic effect relate to singlet oxygen and other reactive oxygen intermediates generated by PDT, which give rise to cellular stress and cause cell death. Previously, using the homemade LED light source, we have shown that topical ALA-PDT is effective for the treatment of warts. However, the excruciating pain induced by ALA and red LED could be due to deeper penetration of the ALA formulation or the deeper penetration of red light. Thus the pain might be related to the injured nerve fibers underlying the skin. This study is to provide evidence of these two green or red LED efficacy in removing the warts and also their side-effect of pain.
Ages Eligible for Study: | 10 Years to 80 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Warts -
Exclusion Criteria:
other skin lesions or combined with infection -
Contact: Hsiung-Fei Chien, MD, Ph.D. | 886223916762 | hfchien@ha.mc.ntu.edu.tw |
Taiwan | |
National Taiwan University Hospital | Recruiting |
Taipei, Taiwan | |
Contact: Hsiung-Fei Chien, MD, Ph.D. 886223123456 ext 5594 hfchien@ha.mc.ntu.edu.tw | |
Sub-Investigator: Chin-Tin Chen, Ph.D. | |
Principal Investigator: Hisung-Fei Chien, MD. Ph.D. |
Study Director: | Pan-Chyr Yang, Ph.D. | National Taiwan University Hospital |
Study ID Numbers: | 28MD01 |
Study First Received: | September 9, 2005 |
Last Updated: | September 9, 2005 |
ClinicalTrials.gov Identifier: | NCT00155584 |
Health Authority: | Taiwan: Department of Health |
warts photodynamic therapy 5-ALA |
Virus Diseases Skin Diseases, Infectious Warts Skin Diseases |
DNA Virus Infections Papillomavirus Infections Aminolevulinic Acid |
Skin Diseases, Viral Neoplasms Tumor Virus Infections |