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2014 ; 70
(2
): 785-94
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Laurdan monitors different lipids content in eukaryotic membrane during embryonic
neural development
#MMPMID24839062
Bonaventura G
; Barcellona ML
; Golfetto O
; Nourse JL
; Flanagan LA
; Gratton E
Cell Biochem Biophys
2014[Nov]; 70
(2
): 785-94
PMID24839062
show ga
We describe a method based on fluorescence-lifetime imaging microscopy (FLIM) to
assess the fluidity of various membranes in neuronal cells at different stages of
development [day 12 (E12) and day 16 (E16) of gestation]. For the FLIM
measurements, we use the Laurdan probe which is commonly used to assess membrane
water penetration in model and in biological membranes using spectral
information. Using the FLIM approach, we build a fluidity scale based on
calibration with model systems of different lipid compositions. In neuronal
cells, we found a marked difference in fluidity between the internal membranes
and the plasma membrane, being the plasma membrane the less fluid. However, we
found no significant differences between the two cell groups, E12 and E16.
Comparison with NIH3T3 cells shows that the plasma membranes of E12 and E16 cells
are significantly more fluid than the plasma membrane of the cancer cells.