Nanoscale fluorescence correlation spectroscopy on intact living cell membranes with NSOM probes.
Biophys J
; 100(2): L8-10, 2011 Jan 19.
Article
in En
| MEDLINE
| ID: mdl-21244822
ABSTRACT
Characterization of molecular dynamics on living cell membranes at the nanoscale is fundamental to unravel the mechanisms of membrane organization and compartmentalization. Here we demonstrate the feasibility of fluorescence correlation spectroscopy (FCS) based on the nanometric illumination of near-field scanning optical microscopy (NSOM) probes on intact living cells. NSOM-FCS applied to fluorescent lipid analogs allowed us to reveal details of the diffusion hidden by larger illumination areas. Moreover, the technique offers the unique advantages of evanescent axial illumination and straightforward implementation of multiple color excitation. As such, NSOM-FCS represents a powerful tool to study a variety of dynamic processes occurring at the nanometer scale on cell membranes.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spectrometry, Fluorescence
/
Microscopy, Scanning Probe
/
Membrane Microdomains
/
Nanostructures
Language:
En
Journal:
Biophys J
Year:
2011
Document type:
Article