Estimation of the mitochondrial membrane potential using fluorescence lifetime imaging microscopy

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dc.contributor.authorOkkelman, Irina A.
dc.contributor.authorPapkovsky, Dmitri B.
dc.contributor.authorDmitriev, Ruslan I.
dc.date.accessioned2019-09-19T15:34:20Z
dc.date.available2019-09-19T15:34:20Z
dc.date.issued2019-09-05
dc.date.updated2019-09-19T15:21:55Z
dc.description.abstractMonitoring of cell metabolism represents an important application area for fluorescence lifetime imaging microscopy (FLIM). In particular, assessment of mitochondrial membrane potential (MMP) in complex three‐dimensional multicellular in vitro, ex vivo, and in vivo models would enable improved segmentation and functional discrimination of cell types, directly report on the mitochondrial function and complement the quenched‐phosphorescence detection of cellular O2 and two‐photon excited FLIM of endogenous NAD(P)H. Here, we report the green and orange‐emitting fluorescent dyes SYTO and tetramethylrhodamine methyl ester (TMRM) as potential FLIM probes for MMP. In addition to nuclear, SYTO 16 and 24 dyes also display mitochondrial accumulation. FLIM with the culture of human colon cancer HCT116 cells allowed observation of the heterogeneity of mitochondrial polarization during the cell cycle progression. The dyes also demonstrated good performance with 3D cultures of Lgr5‐GFP mouse intestinal organoids, providing efficient and quick cell staining and compatibility with two‐photon excitation. Multiplexed imaging of Lgr5‐GFP, proliferating cells (Hoechst 33342‐aided FLIM), and TMRM‐FLIM allowed us to identify the population of metabolically active cells in stem cell niche. TMRM‐FLIM enabled to visualize the differences in membrane potential between Lgr5‐positive and other proliferating and differentiated cell types. Altogether, SYTO 24 and TMRM dyes represent promising markers for advanced FLIM‐based studies of cell bioenergetics with complex 3D and in vivo models.en
dc.description.statusPeer revieweden
dc.description.versionSubmitted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationOkkelman, I. A., Papkovsky, D. B. and Dmitriev, R. I. 'Estimation of the Mitochondrial Membrane Potential Using Fluorescence Lifetime Imaging Microscopy', Cytometry Part A, In Press, doi: 10.1002/cyto.a.23886en
dc.identifier.doi10.1002/cyto.a.23886en
dc.identifier.endpage13en
dc.identifier.issn1552-4922
dc.identifier.journaltitleCytometry Part Aen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/8583
dc.language.isoenen
dc.publisherWileyen
dc.relation.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/cyto.a.23886
dc.rights© 2019 International Society for Advancement of Cytometry. This is the pre-peer reviewed version of the following article: Okkelman, I. A., Papkovsky, D. B. and Dmitriev, R. I. (2019), Estimation of the Mitochondrial Membrane Potential Using Fluorescence Lifetime Imaging Microscopy. Cytometry, which has been published in final form at https://doi.org/10.1002/cyto.a.23886. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archivingen
dc.subjectFLIMen
dc.subjectIntestinal organoidsen
dc.subjectMitochondrial membrane potentialen
dc.subjectSYTOen
dc.subjectTetramethylrhodamine methyl esteren
dc.subjectLgr5‐GFPen
dc.titleEstimation of the mitochondrial membrane potential using fluorescence lifetime imaging microscopyen
dc.typeArticle (peer-reviewed)en
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