A novel method using confocal laser scanning microscopy for sensitive measurement of P-glycoprotein-mediated transport activity in Caco-2 cells

Objectives  The aim of this study was to use time‐lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P‐glycoprotein activity in Caco‐2 cells. Methods  The change in the fluorescence of residual rhodamine 123 at the apical and central regions of...

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Published in:Journal of pharmacy and pharmacology Vol. 63; no. 8; pp. 1015 - 1021
Main Authors: Wakuda, Hirokazu, Nejime, Namie, Tada, Yukari, Kagota, Satomi, Fahmi, Odette A., Umegaki, Keizo, Yamada, Shizuo, Shinozuka, Kazumasa
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01-08-2011
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Abstract Objectives  The aim of this study was to use time‐lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P‐glycoprotein activity in Caco‐2 cells. Methods  The change in the fluorescence of residual rhodamine 123 at the apical and central regions of Caco‐2 cells was measured in the presence of digoxin or St John's wort by using time‐lapse confocal laser scanning microscopy. The data were compared with measurements made using conventional techniques, a fluorescence microplate reader and a fluorescence microscope. Key findings  The percentage decrease of rhodamine 123 caused by 10 µm digoxin or 0.1 µg/ml St John's wort was significantly larger in the apical region of the Caco‐2 cell than in the central region or in the whole cell. The digoxin‐induced inhibition in the apical region as measured by time‐lapse confocal laser scanning microscopy was greater than that measured in the whole cell by a microplate reader or a fluorescence microscope. Conclusions  The assay of residual rhodamine 123 in the apical region of Caco‐2 cells by confocal laser scanning microscopy was more sensitive than the conventional methods using a microplate reader or fluorescence microscopy. It will be a valuable screening tool for studying both the inhibition and induction of P‐glycoprotein activity.
AbstractList Objectives  The aim of this study was to use time‐lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P‐glycoprotein activity in Caco‐2 cells. Methods  The change in the fluorescence of residual rhodamine 123 at the apical and central regions of Caco‐2 cells was measured in the presence of digoxin or St John's wort by using time‐lapse confocal laser scanning microscopy. The data were compared with measurements made using conventional techniques, a fluorescence microplate reader and a fluorescence microscope. Key findings  The percentage decrease of rhodamine 123 caused by 10 µm digoxin or 0.1 µg/ml St John's wort was significantly larger in the apical region of the Caco‐2 cell than in the central region or in the whole cell. The digoxin‐induced inhibition in the apical region as measured by time‐lapse confocal laser scanning microscopy was greater than that measured in the whole cell by a microplate reader or a fluorescence microscope. Conclusions  The assay of residual rhodamine 123 in the apical region of Caco‐2 cells by confocal laser scanning microscopy was more sensitive than the conventional methods using a microplate reader or fluorescence microscopy. It will be a valuable screening tool for studying both the inhibition and induction of P‐glycoprotein activity.
The aim of this study was to use time-lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P-glycoprotein activity in Caco-2 cells. The change in the fluorescence of residual rhodamine 123 at the apical and central regions of Caco-2 cells was measured in the presence of digoxin or St John's wort by using time-lapse confocal laser scanning microscopy. The data were compared with measurements made using conventional techniques, a fluorescence microplate reader and a fluorescence microscope. The percentage decrease of rhodamine 123 caused by 10 µm digoxin or 0.1 µg/ml St John's wort was significantly larger in the apical region of the Caco-2 cell than in the central region or in the whole cell. The digoxin-induced inhibition in the apical region as measured by time-lapse confocal laser scanning microscopy was greater than that measured in the whole cell by a microplate reader or a fluorescence microscope. The assay of residual rhodamine 123 in the apical region of Caco-2 cells by confocal laser scanning microscopy was more sensitive than the conventional methods using a microplate reader or fluorescence microscopy. It will be a valuable screening tool for studying both the inhibition and induction of P-glycoprotein activity.
OBJECTIVESThe aim of this study was to use time-lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P-glycoprotein activity in Caco-2 cells.METHODSThe change in the fluorescence of residual rhodamine 123 at the apical and central regions of Caco-2 cells was measured in the presence of digoxin or St John's wort by using time-lapse confocal laser scanning microscopy. The data were compared with measurements made using conventional techniques, a fluorescence microplate reader and a fluorescence microscope.KEY FINDINGSThe percentage decrease of rhodamine 123 caused by 10 µm digoxin or 0.1 µg/ml St John's wort was significantly larger in the apical region of the Caco-2 cell than in the central region or in the whole cell. The digoxin-induced inhibition in the apical region as measured by time-lapse confocal laser scanning microscopy was greater than that measured in the whole cell by a microplate reader or a fluorescence microscope.CONCLUSIONSThe assay of residual rhodamine 123 in the apical region of Caco-2 cells by confocal laser scanning microscopy was more sensitive than the conventional methods using a microplate reader or fluorescence microscopy. It will be a valuable screening tool for studying both the inhibition and induction of P-glycoprotein activity.
Author Shinozuka, Kazumasa
Fahmi, Odette A.
Umegaki, Keizo
Kagota, Satomi
Nejime, Namie
Wakuda, Hirokazu
Tada, Yukari
Yamada, Shizuo
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  givenname: Namie
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  givenname: Kazumasa
  surname: Shinozuka
  fullname: Shinozuka, Kazumasa
  email: kazumasa@mukogawa-u.ac.jp
  organization: aDepartment of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya
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2006; 28
2006; 1758
2010; 113
1997; 19
1951; 193
1999; 99
2003; 48
2008; 358
1983; 68
1983; 24
2005; 33
2009; 323
2010; 33
2001; 70
2010; 32
2002; 292
2000; 355
2000; 69
1994; 270
1990; 38
2000; 67
2008; 14
2011; 78
2008; 52
1993; 268
1991; 337
1999; 104
2009; 36
2000; 38
2010; 334
2010; 332
2009; 8
1998; 31
2003; 20
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Snippet Objectives  The aim of this study was to use time‐lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating...
The aim of this study was to use time-lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating P-glycoprotein...
OBJECTIVESThe aim of this study was to use time-lapse confocal laser scanning microscopy to establish a more sensitive and specific method for evaluating...
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SubjectTerms ATP-Binding Cassette, Sub-Family B, Member 1 - metabolism
Biological Transport - drug effects
Biological Transport - physiology
Caco-2 cells
Caco-2 Cells - metabolism
confocal laser scanning microscopy
digoxin
Digoxin - pharmacology
Drug Interactions - physiology
Fluorescent Dyes - metabolism
Humans
Hypericum
Microscopy, Confocal - methods
P-glycoprotein
Plant Extracts - pharmacology
Rhodamine 123 - metabolism
St John's wort
Title A novel method using confocal laser scanning microscopy for sensitive measurement of P-glycoprotein-mediated transport activity in Caco-2 cells
URI https://api.istex.fr/ark:/67375/WNG-Z3QZBF53-D/fulltext.pdf
https://onlinelibrary.wiley.com/doi/abs/10.1111%2Fj.2042-7158.2011.01294.x
https://www.ncbi.nlm.nih.gov/pubmed/21718284
https://search.proquest.com/docview/874486808
Volume 63
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