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A comparative study on the enhancement efficacy of specific and non-specific iron chelators for protoporphyrin IX production and photosensitization in HaCat cells
- Source :
- Journal of Huazhong University of Science and Technology [Medical Sciences]. 29:765-770
- Publication Year :
- 2009
- Publisher :
- Springer Science and Business Media LLC, 2009.
-
Abstract
- The iron chelators can be utilized in target cells to improve 5-aminolaevulinic acid (ALA)-based photodynamic therapy (PDT). The purpose of this study is to compare the effect of two kinds of iron chelators, desferrioxamine (DFO) and ethylenediaminetetraacetic acid (EDTA) on the enhancement of ALA-PDT. HaCat cells were cultured in medium containing 2.0 mmol/L of ALA and 0.5 mmol/L of DFO or EDTA. After 3-h incubation in the dark, the concentration of cellular protoporphyrin IX (PpIX) was detected by high performance liquid chromatography (HPLC), and the fluorescence of PpIX was observed at 630 nm emission under confocal laser scanning microscope. For PDT, HaCat cells were irradiated using 632.8 nm laser, and the fractions of apoptotic and necrotic cells were flow cytometrically assayed. Related differences in morphology and ultrastructure of Ha-Cat cells were observed using optical microscope or transmission electron microscope. Compared to incubation with ALA alone, the addition of DFO or EDTA increased the concentration of cellular PpIX and the fluorescent density of PpIX, and also increased cell death ratio after PDT. PDT using ALA plus DFO produced the highest cellular PpIX level, greatest cell death ratio and most severe structural damage to the cells. It was concluded that both DFO and EDTA could enhance ALA-based PpIX production and PDT. Compared to the non-specific iron chelator of EDTA, the specific chelator, DFO, showed more potential for the enhancement.
- Subjects :
- Keratinocytes
Programmed cell death
medicine.medical_treatment
Biomedical Engineering
Protoporphyrins
Photodynamic therapy
Ethylenediaminetetraacetic acid
Deferoxamine
Iron Chelating Agents
Biochemistry
Biomaterials
chemistry.chemical_compound
Genetics
medicine
Humans
Chelation
Photosensitivity Disorders
Edetic Acid
Cell Line, Transformed
Earth-Surface Processes
Photosensitizing Agents
Protoporphyrin IX
Aminolevulinic Acid
Molecular biology
HaCaT
chemistry
Apoptosis
Cell culture
Subjects
Details
- ISSN :
- 19931352 and 16720733
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Journal of Huazhong University of Science and Technology [Medical Sciences]
- Accession number :
- edsair.doi.dedup.....7f52264ed2efa8dc6645481d6f4e883b