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Monitoring of real changes of plasma membrane potential by diS-C(3)(3) fluorescence in yeast cell suspensions
J. Plášek, D. Gášková, H. Lichtenberg-Fraté, J. Ludwig, M. Höfer,
Jazyk angličtina Země Spojené státy americké
Typ dokumentu časopisecké články
NLK
ProQuest Central
od 1997-02-01 do Před 1 rokem
Medline Complete (EBSCOhost)
od 2011-02-01 do Před 1 rokem
Health & Medicine (ProQuest)
od 1997-02-01 do Před 1 rokem
- MeSH
- fluorescenční barviva chemie MeSH
- karbocyaniny chemie MeSH
- membránové potenciály fyziologie MeSH
- Rhodotorula cytologie fyziologie MeSH
- Publikační typ
- časopisecké články MeSH
The fluorescent dye 3,3'-dipropylthiadicarbocyanine, diS-C(3)(3), is a suitable probe to monitor real changes of plasma membrane potential in yeast cells which are too small for direct membrane potential measurements with microelectrodes. A method presented in this paper makes it possible to convert changes of equilibrium diS-C(3)(3) fluorescence spectra, measured in yeast cell suspensions under certain defined conditions, into underlying membrane potential differences, scaled in the units of millivolts. Spectral analysis of synchronously scanned diS-C(3)(3) fluorescence allows to assess the amount of dye accumulated in cells without otherwise necessary sample taking and following separation of cells from the medium. Moreover, membrane potential changes can be quantified without demanding calibration protocols. The applicability of this approach was demonstrated on the depolarization of Rhodotorula glutinis yeast cells upon acidification of cell suspensions and/or by increasing extracellular K(+) concentration.
Citace poskytuje Crossref.org
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- $a The fluorescent dye 3,3'-dipropylthiadicarbocyanine, diS-C(3)(3), is a suitable probe to monitor real changes of plasma membrane potential in yeast cells which are too small for direct membrane potential measurements with microelectrodes. A method presented in this paper makes it possible to convert changes of equilibrium diS-C(3)(3) fluorescence spectra, measured in yeast cell suspensions under certain defined conditions, into underlying membrane potential differences, scaled in the units of millivolts. Spectral analysis of synchronously scanned diS-C(3)(3) fluorescence allows to assess the amount of dye accumulated in cells without otherwise necessary sample taking and following separation of cells from the medium. Moreover, membrane potential changes can be quantified without demanding calibration protocols. The applicability of this approach was demonstrated on the depolarization of Rhodotorula glutinis yeast cells upon acidification of cell suspensions and/or by increasing extracellular K(+) concentration.
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