Abstract:
BACKGROUND:Photodynamic therapy (PDT) is a non-surgical method for treating non-melanoma skin cancer and precancerous lesions which involves the activation of a photosensitizer by visible light to produce activated oxygen species within target cells, resulting in the destruction of the latter. The present study evaluates the effect of PDT on primary normal and basal cell carcinoma cultures in vitro. METHODS:Primary human keratinocytes and carcinoma cell cultures were exposed to various concentrations of 5,10,15,20-tetra-(para-methoxyphenyl) porphyrin (TMP) and its zinc compound (Zn-TMP) for 24 hours, with or without chitosan, and then irradiated using a PDT lamp (630 nm, 6 J/cm(2)). The effects of PDT were assessed using a 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt (MTS) assay and an immunocytochemical method with Annexin V-FITC for detecting apoptosis. RESULTS:Both tested substances, TMP and Zn-TMP, had a phototoxic effect on primary human carcinoma cell cultures in concentrations of 1-100 μg/ml, which positively correlated with the concentration of the photosensitizer. There was no phototoxic effect on primary keratinocytes, probably because of the preferential accumulation of photosensitizing substances in tumoral cells. Administration of chitosan in association with photosensitizing substances increased cell viability compared with photosensitizers alone, exerting a cytoprotective effect. CONCLUSIONS:The study demonstrates that the photodynamic activity of TMP and its metalloporphyrin derivative is limited to primary human carcinoma cells and suggests that these porphyrins could be efficiently used in PDT in vivo.
journal_name
Int J Dermatoljournal_title
International journal of dermatologyauthors
Susan M,Baldea I,Senila S,Macovei V,Dreve S,Ion RM,Cosgarea Rdoi
10.1111/j.1365-4632.2010.04700.xsubject
Has Abstractpub_date
2011-03-01 00:00:00pages
280-6issue
3eissn
0011-9059issn
1365-4632journal_volume
50pub_type
杂志文章abstract::The epidemiology of scabies for the last twelve years has been studied in Turkey. Information was obtained from three regions (Istanbul, Ankara and Erzurum) having different climates. There has been an increase in scabies in the years following 1969 in Ankara and Erzurum and from 1967 on in Istanbul. It reached its ma...
journal_title:International journal of dermatology
pub_type: 杂志文章
doi:10.1111/j.1365-4362.1980.tb01993.x
更新日期:1980-01-01 00:00:00
abstract:BACKGROUND:Tranexamic acid (TA) is a traditional plasmin inhibitor, and its role in the renovation of damaged skin has become the topic of a lot of research. The aim of this study is to determine whether TA could repair the skin barrier by means of tight intercellular junctions. METHODS:Two kinds of damaged skin model...
journal_title:International journal of dermatology
pub_type: 杂志文章
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abstract:BACKGROUND:Tattoos have reached broadening mainstream acceptance. Medical professional societies have noted that tattoos may co-occur with high risk behaviors. METHODS:Using a variety of statistical models applied to a sample of 2,008 adults residing in the United States via Amazon's Mechanical Turk, we estimate the a...
journal_title:International journal of dermatology
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abstract::Pneumocystis jiroveci pneumonia is an opportunistic infection associated with substantial rates of mortality in immunosuppressed patients. Prophylaxis recommendations are mostly targeted toward patients with non-dermatologic diagnoses. This study was conducted to determine when dermatology patients treated with immuno...
journal_title:International journal of dermatology
pub_type: 杂志文章,评审
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abstract:BACKGROUND:Pediculosis, caused by head lice (Pediculidae: Pediculus humanus var. capitis), is experiencing a global resurgence, with the prevalence in primary schools averaging as high as 40% in some areas regardless of socioeconomic factors. Control efforts using chemical treatments are becoming increasingly ineffecti...
journal_title:International journal of dermatology
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doi:10.1111/j.1365-4632.2007.03132.x
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abstract::A 20-year-old woman with a 2-year history of histologically confirmed palmoplantar keratoderma due to psoriasis, resistant to several topical agents, was admitted to the Department of Dermatology, Uludag University, Bursa, Turkey. Therapy with oral acitretin (0.5 mg/kg/day, 35 mg/day) was initiated. A month after star...
journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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abstract:BACKGROUND:In July 2008, the German statutory health insurance introduced a nationwide skin cancer screening program. Before the introduction, eligible physicians had to qualify to perform the screening test and counsel their patients on skin cancer screening. To educate physicians, a curriculum and training materials ...
journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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pub_type: 杂志文章,评审
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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abstract:BACKGROUND:The incidence of basal cell carcinoma (BCC) in younger individuals has increased in recent decades. However, the characteristics of BCCs in this population, especially in Ibero-Latin American countries, have not been completely defined. OBJECTIVE:To describe the demographic, clinical, and histopathological ...
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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journal_title:International journal of dermatology
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abstract::In a consecutive series of 1,067 patients entered into the data base of the Melanoma Cooperative Group at New York University School of Medicine between 1972 and 1980, 120 men were of draft age (18-31 years) during World War II (1941-1945). Questionnaires were sent to these 120 individuals; 89 responded. Simultaneousl...
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journal_title:International journal of dermatology
pub_type: 杂志文章
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更新日期:2007-03-01 00:00:00
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journal_title:International journal of dermatology
pub_type: 杂志文章
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更新日期:2018-04-01 00:00:00
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journal_title:International journal of dermatology
pub_type: 杂志文章
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