A D Scully, R B Ostler, D Phillips, P O'Neill, K M S Townsend, A W Parker, A J MacRobert
{"title":"Application of fluorescence lifetime imaging microscopy to the investigation of intracellular PDT mechanisms","authors":"A D Scully, R B Ostler, D Phillips, P O'Neill, K M S Townsend, A W Parker, A J MacRobert","doi":"10.1002/1361-6374(199703)5:1<9::AID-BIO2>3.0.CO;2-A","DOIUrl":null,"url":null,"abstract":"<p>The potential for the application of fluorescence lifetime imaging (FLIM) microscopy to studies of photosensitization mechanisms in photodynamic therapy (PDT) has been investigated. The fluorescence microscope incorporates a standard inverted optical microscope, a picosecond pulsed dye-laser excitation source, and an intensified CCD camera detector capable of being gated on a sub-nanosecond timescale. Fluorescence lifetime images resulting from multi-component analysis of sub-nanosecond gated fluorescence images of monolayer V79-4 Chinese hamster lung fibroblasts stained with disulphonated aluminium phthalocyanine (AlPcS2), a photosensitizer used in PDT, are presented. The results of these measurements are discussed in terms of the intracellular localization of the sensitizer. Preliminary results from multi-component FLIM of V79-4 cells multiply stained with AlPcS2 and a potential intracellular pH lifetime probe, 5(+6)-carboxynaphthofluorescein, are also presented.</p>","PeriodicalId":100176,"journal":{"name":"Bioimaging","volume":"5 1","pages":"9-18"},"PeriodicalIF":0.0000,"publicationDate":"2001-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1361-6374(199703)5:1<9::AID-BIO2>3.0.CO;2-A","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioimaging","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/1361-6374%28199703%295%3A1%3C9%3A%3AAID-BIO2%3E3.0.CO%3B2-A","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The potential for the application of fluorescence lifetime imaging (FLIM) microscopy to studies of photosensitization mechanisms in photodynamic therapy (PDT) has been investigated. The fluorescence microscope incorporates a standard inverted optical microscope, a picosecond pulsed dye-laser excitation source, and an intensified CCD camera detector capable of being gated on a sub-nanosecond timescale. Fluorescence lifetime images resulting from multi-component analysis of sub-nanosecond gated fluorescence images of monolayer V79-4 Chinese hamster lung fibroblasts stained with disulphonated aluminium phthalocyanine (AlPcS2), a photosensitizer used in PDT, are presented. The results of these measurements are discussed in terms of the intracellular localization of the sensitizer. Preliminary results from multi-component FLIM of V79-4 cells multiply stained with AlPcS2 and a potential intracellular pH lifetime probe, 5(+6)-carboxynaphthofluorescein, are also presented.