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In Vitro Study of Fluorescence Detection for Protoporphyrin IX Induced from 5-Aminolevulinic Acid in Cancerous and Normal Cells  

Kim, Myung-Hwa (Department of Chemistry, Keimyung University)
Kim, Hyun-Jeong (The Center for Traditional Microorganism Resources, Keimyung University)
Lee, In-Seon (The Center for Traditional Microorganism Resources, Keimyung University)
Kim, Kyung-Chan (Department of Digital Physics, Keimyung University)
Lee, Chang-Seop (Department of Chemistry, Keimyung University)
Publication Information
KSBB Journal / v.21, no.3, 2006 , pp. 171-174 More about this Journal
Abstract
To clarify the usefulness of fluorescent diagnosis for cancer, We investigated the optimal method of administrating 5-aminolevulinic acid(5-ALA) by analyzing fluorescence signal of Protoporphyrin IX(PpIX) in the cultured normal and cancer cells. 5-ALA was injected as a photosensitizer to the cervico-uterine cancer cell line(HeLa) and in normal liver cells(Chang). Chang and HeLa cells were incubated with various concentrations of 5-ALA($0-800{\mu}g/ml$). The accumulation of PpIX induced by 5-ALA was in HeLa and Chang cells. The cell viability was measured by MTT assay. The optimal concentration of ALA that induced maximum levels of PpIX was $50{\mu}g/ml$ in HeLa cell cultured for 24 hours after 5-ALA injection. Fluorescence of PpIX in HeLa cell was excited at a wavelength(${\lambda}$=410 nm) and showed an emission spectrum at 602.3 nm, 659.9 nm which could be related to the PpIX generation induced by the applied 5-ALA. The experimental results showed that fluorescence signal of PpIX was proportional to the concentration of 5-ALA in cancer cells, but measured with low concentration in normal cells.
Keywords
5-aminolevulinic acid; Protoporphyrin IX; Photosensitizer;
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