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Qu D, Liao F, Liu J, Li X, Ye C, Zheng Y, Xie X, Yi J, Lai W. The dose response of erythemal area and intensity on the unprotected skin fits well to a logistic 3P model in SPF tests of a Chinese population, which has the potential to improve the precision and consistency of minimal erythema dose determination. PHOTODERMATOLOGY, PHOTOIMMUNOLOGY & PHOTOMEDICINE 2023; 39:633-641. [PMID: 37667596 DOI: 10.1111/phpp.12909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 09/06/2023]
Abstract
BACKGROUND The current ISO guidelines for minimal erythema dose (MED) determination require assessment of erythema area of UV-irradiated skin sites. However, this parameter has not been adequately quantified in daily practice. The aims of this study were to investigate the dose response on the unprotected skin sites by quantifying the erythema area and intensity and to show the potential for improving the precision and consistency of MEDu determination by developing predictive models. METHODS Standard radiation tests were conducted on the back of 31 healthy Chinese volunteers and the MEDu site of each subject was clinically determined by dermatologists. Images of test sites were captured 24 h after radiation, and the erythema area (%EA) and intensity (∆a*) were measured by image analysis. The data were fitted to a logistic 3P function to obtain dose-response curves, and a set of logit (inverse-logistic) models were then derived. An erythema area threshold of %EA = 52% was established to predict MEDu based on the clinical endpoints defined by ISO 24444:2019. RESULTS Analysis of the clinically determined MEDu sites revealed wide ranges of %EA (62.3 ± 15% SD) and ∆a* (2.96 ± 0.92 SD). The dose response fitted well to a logistic 3P model (mean R2 = 0.965 and 0.975 for %EA and ∆a*, respectively). Applying the area threshold, values of MEDu were determined by the logit model for the test population, which significantly improved the consistency of MEDu determination (52 ± 0% SD and 2.73 ± 0.61 SD for %EA and ∆a*, respectively). CONCLUSION This study demonstrated that the dose response of UV-induced erythema can be quantified and modeled once the erythema area and intensity are measured. The results of this study show the potential to improve the precision and consistency of MEDu determination in an SPF test. The similar potential in photodermatological, therapeutic, and diagnostic applications was also implied.
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Affiliation(s)
- Di Qu
- Amway Innovation & Science, Ada, Michigan, USA
| | - Feng Liao
- Amway (Shanghai) Innovation & Science Center, Shanghai, China
| | - Jianwei Liu
- Amway (Shanghai) Innovation & Science Center, Shanghai, China
| | - Xiangzi Li
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Congxiu Ye
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yue Zheng
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaoyuan Xie
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Jinling Yi
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Wei Lai
- Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
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Amorrortu RP, Fenske NA, Cherpelis BS, Vijayan L, Zhao Y, Balliu J, Messina JL, Sondak VK, Giuliano AR, Waterboer T, Pawlita M, Gheit T, Tommasino M, Rollison DE. Viruses in Skin Cancer (VIRUSCAN): Study Design and Baseline Characteristics of a Prospective Clinic-Based Cohort Study. Cancer Epidemiol Biomarkers Prev 2020; 29:39-48. [PMID: 31427307 PMCID: PMC6954275 DOI: 10.1158/1055-9965.epi-19-0446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/26/2019] [Accepted: 08/13/2019] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Accumulating evidence suggests that cutaneous viral infections are risk factors for the development of keratinocyte carcinomas. The Viruses in Skin Cancer (VIRUSCAN) Study, a prospective cohort study, was established in 2014 to investigate the risk of keratinocyte carcinoma associated with cutaneous human papillomavirus and polyomavirus infection and the possible interaction with ultraviolet radiation exposure (UVR). METHODS/RESULTS VIRUSCAN incorporates repeated measures of viral infection using multiple markers of infection and quantitative measures of UVR using a spectrophotometer. Participants were recruited between July 14, 2014 and August 31, 2017 at the University of South Florida Dermatology Clinic in Tampa, FL. After excluding 124 individuals with prevalent keratinocyte carcinomas at baseline, 1,179 participants (53.2% women, 46.8% men, all ages 60 years and older) were followed for up to 4 years with routine skin exams occurring every 6 to 12 months. Here, we present the VIRUSCAN Study design, methods, and baseline characteristics, including demographics, sun exposure behavior, quantitative UVR exposure measurements, and cutaneous viral prevalence, for the full study cohort. CONCLUSIONS The VIRUSCAN Study will provide critical temporal evidence needed to assess the causality of the role cutaneous viral infections play in the development of keratinocyte carcinomas, as well as the potential interaction between cutaneous viral infections and UVR exposure. IMPACT Study findings will be valuable in future development of novel keratinocyte carcinoma prevention strategies.
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MESH Headings
- Aged
- Carcinoma, Basal Cell/epidemiology
- Carcinoma, Basal Cell/etiology
- Carcinoma, Basal Cell/pathology
- Carcinoma, Merkel Cell/diagnosis
- Carcinoma, Merkel Cell/epidemiology
- Carcinoma, Merkel Cell/pathology
- Carcinoma, Merkel Cell/virology
- Carcinoma, Squamous Cell/epidemiology
- Carcinoma, Squamous Cell/etiology
- Carcinoma, Squamous Cell/pathology
- Female
- Follow-Up Studies
- Humans
- Keratinocytes/pathology
- Keratinocytes/radiation effects
- Keratinocytes/virology
- Male
- Middle Aged
- Prevalence
- Prospective Studies
- Research Design
- Risk Factors
- Skin/cytology
- Skin/pathology
- Skin/radiation effects
- Skin/virology
- Skin Neoplasms/diagnosis
- Skin Neoplasms/epidemiology
- Skin Neoplasms/etiology
- Skin Neoplasms/pathology
- Spectrophotometry, Ultraviolet
- Ultraviolet Rays/adverse effects
- Warts/diagnosis
- Warts/epidemiology
- Warts/pathology
- Warts/virology
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Affiliation(s)
| | - Neil A Fenske
- Department of Dermatology and Cutaneous Surgery, University of South Florida College of Medicine, Tampa, Florida
| | - Basil S Cherpelis
- Department of Dermatology and Cutaneous Surgery, University of South Florida College of Medicine, Tampa, Florida
| | - Laxmi Vijayan
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida
| | - Yayi Zhao
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida
| | - Juliana Balliu
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida
| | - Jane L Messina
- Department of Dermatology and Cutaneous Surgery, University of South Florida College of Medicine, Tampa, Florida
- Department of Anatomic Pathology, Moffitt Cancer Center, Tampa, Florida
- Department of Cutaneous Oncology, Moffitt Cancer Center, Tampa, Florida
| | - Vernon K Sondak
- Department of Cutaneous Oncology, Moffitt Cancer Center, Tampa, Florida
| | - Anna R Giuliano
- Center for Immunization and Infection Research in Cancer, Moffitt Cancer Center, Tampa, Florida
| | - Tim Waterboer
- Infections and Cancer Epidemiology Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Michael Pawlita
- Infections and Cancer Epidemiology Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Tarik Gheit
- Infections and Cancer Biology Group, International Agency for Research on Cancer-World Health Organization, Lyon, France
| | - Massimo Tommasino
- Infections and Cancer Biology Group, International Agency for Research on Cancer-World Health Organization, Lyon, France
| | - Dana E Rollison
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida.
- Center for Immunization and Infection Research in Cancer, Moffitt Cancer Center, Tampa, Florida
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The Effect of UVB Irradiation and Oxidative Stress on the Skin Barrier-A New Method to Evaluate Sun Protection Factor Based on Electrical Impedance Spectroscopy. SENSORS 2019; 19:s19102376. [PMID: 31126113 PMCID: PMC6566889 DOI: 10.3390/s19102376] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/16/2019] [Accepted: 05/21/2019] [Indexed: 11/16/2022]
Abstract
Sunlight is vital for several biochemical processes of the skin organ. However, acute or chronic exposure to ultraviolet radiation (UVR) has several harmful effects on the skin structure and function, especially in the case of the failing function of antioxidative enzymes, which may lead to substantial tissue damage due to the increased presence of reactive oxygen species (ROS). The aim of this work was to investigate the combined effect of ultraviolet B (UVB) irradiation and oxidative stress on the skin barrier integrity. For this, we employed electrical impedance spectroscopy (EIS) to characterize changes of the electrical properties of excised pig skin membranes after various exposure conditions of UVB irradiation, oxidative stress, and the inhibition of antioxidative enzymatic processes. The oxidative stress was regulated by adding hydrogen peroxide (H2O2) as a source of ROS, while sodium azide (NaN3) was used as an inhibitor of the antioxidative enzyme catalase, which is naturally present throughout the epidermis. By screening for the combined effect of UVB and oxidative stress on the skin membrane electrical properties, we developed a new protocol for evaluating these parameters in a simple in vitro setup. Strikingly, the results show that exposure to extreme UVB irradiation does not affect the skin membrane resistance, implying that the skin barrier remains macroscopically intact. Likewise, exposure to only oxidative stress conditions, without UVB irradiation, does not affect the skin membrane resistance. In contrast to these observations, the combination of UVB irradiation and oxidative stress conditions results in a drastic decrease of the skin membrane resistance, indicating that the integrity of the skin barrier is compromised. Further, the skin membrane effective capacitance remained more or less unaffected by UVB exposure, irrespective of simultaneous exposure of oxidative stress. The EIS results were concluded to be associated with clear signs of macroscopic tissue damage of the epidermis as visualized with microscopy after exposure to UVB irradiation under oxidative stress conditions. Finally, the novel methodology was tested by performing an assessment of cosmetic sunscreen formulations with varying sun protection factor (SPF), with an overall successful outcome, showing good correlation between SPF value and protection capacity in terms of skin resistance change. The results from this study allow for the development of new skin sensors based on EIS for the detection of skin tissue damage from exposure to UVB irradiation and oxidative stress and provide a new, more comprehensive methodology, taking into account both the influence of UVB irradiation and oxidative stress, for in vitro determination of SPF in cosmetic formulations.
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Bae JM, Eun SH, Lee HN, Kim GM, Grimes PE, Lee JH. Comparison of 311‐nm Titanium:Sapphire laser and 308‐nm excimer laser treatment for vitiligo: A randomized controlled non‐inferiority trial. Lasers Surg Med 2019; 51:239-244. [DOI: 10.1002/lsm.23048] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Jung Min Bae
- Department of DermatologySt. Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSuwonKorea
| | - Sung Hye Eun
- Department of DermatologySt. Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSuwonKorea
| | - Han Na Lee
- Department of DermatologySt. Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSuwonKorea
| | - Gyong Moon Kim
- Department of DermatologySt. Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSuwonKorea
| | - Pearl E. Grimes
- Division of DermatologyVitiligo & Pigmentation Institute of Southern CaliforniaDavid Geffen School of MedicineUniversity of CaliforniaLos AngelesCalifornia
| | - Ji Hae Lee
- Department of DermatologySt. Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSuwonKorea
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Esmat S, Hegazy RA, Shalaby S, Hu SCS, Lan CCE. Phototherapy and Combination Therapies for Vitiligo. Dermatol Clin 2017; 35:171-192. [PMID: 28317527 DOI: 10.1016/j.det.2016.11.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Vitiligo is a disease characterized by disappearance of melanocytes from the skin. It can negatively influence the physical appearance of affected individuals, and may profoundly affect a person's psychosocial function and quality of life. Therefore, vitiligo should not be considered as merely a condition that affects a patient's appearance, but needs to be actively treated in patients who seek medical help. Phototherapy has been used as the main treatment modality for patients with vitiligo. Different forms of phototherapy for vitiligo include broadband UVB, narrowband UVB, excimer light and excimer laser, and psoralen plus UVA.
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Affiliation(s)
- Samia Esmat
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Rehab A Hegazy
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Suzan Shalaby
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Stephen Chu-Sung Hu
- Department of Dermatology, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No 100, Tzyou 1st Road, Kaohsiung 807, Taiwan
| | - Cheng-Che E Lan
- Department of Dermatology, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No 100, Tzyou 1st Road, Kaohsiung 807, Taiwan.
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Esmat S, Mostafa W, Hegazy RA, Shalaby S, Sheth V, Youssef R, El-Mofty M. WITHDRAWN: Phototherapy: The Vitiligo Management Pillar. Clin Dermatol 2016. [DOI: 10.1016/j.clindermatol.2016.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Esmat S, Mostafa W, Hegazy RA, Shalaby S, Sheth V, Youssef R, El-Mofty M. Phototherapy: The vitiligo management pillar. Clin Dermatol 2016; 34:594-602. [PMID: 27638438 DOI: 10.1016/j.clindermatol.2016.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Phototherapy has been the mainstay of vitiligo therapy for several decades. A variety of wavelengths and modalities are available, but narrowband ultraviolet B remains the safest and most commonly used treatment. Acting on multiple steps in vitiligo pathogenesis, narrowband ultraviolet B is one of the few therapies that can effectively induce stabilization and stimulate repigmentation. Achievement of optimal results involves using a combination of appropriate treatment protocols, careful patient selection, and patient education to set expectations. Individual patient characteristics, including disease activity, vitiligo phenotype, lesion location, and skin phototype, should all be considered, along with combination therapies.
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Affiliation(s)
- Samia Esmat
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt.
| | - Wedad Mostafa
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Rehab A Hegazy
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Suzan Shalaby
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Vaneeta Sheth
- Newton-Wellesley Dermatology Associates, Wellesley, MA
| | - Randa Youssef
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
| | - Medhat El-Mofty
- Phototherapy Unit, Dermatology Department, Faculty of Medicine, Cairo University, Egypt
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