Related Experiment Videos
Atomic force microscopy of renal cells: limits and prospects
E Lesniewska1, M C Giocondi, V Vié
1Centre de Biochimie Structurale, INSERM U414, I.U.R.C., Montpellier, France.
Kidney International. Supplement
|April 29, 1998
Summary
Atomic force microscopy (AFM) images living cell surfaces and membranes. While AFM reveals cell surface topography, imaging dense microvilli is limited, but it shows membrane proteins on isolated membranes.
Area of Science:
- Biophysics
- Cell Biology
- Surface Science
Background:
- Atomic force microscopy (AFM) is a powerful tool for imaging biological samples at the nanoscale.
- Understanding cell surface topography and membrane protein distribution is crucial for cell function studies.
Purpose of the Study:
- To evaluate the capabilities and limitations of AFM for imaging living cell surfaces and isolated biological membranes.
- To present 3D images illustrating AFM's potential in visualizing cellular structures.
Main Methods:
- Three-dimensional imaging using atomic force microscopy (AFM).
- Analysis of living Madin-Darby canine kidney (MDCK) cells and CV-1 cells.
- Imaging of isolated biological membranes.
Main Results:
- AFM successfully imaged microvilli on living epithelial cells.
- Imaging of densely packed microvilli was limited by AFM tip geometry.
- Nanometer-scale imaging of CV-1 cells and isolated membranes revealed protruding particles (5-60 nm) likely representing membrane proteins.
- AFM provided mesoscopic-scale access to cell surface structure.
Conclusions:
- AFM offers valuable insights into cell surface topography and membrane organization.
- Limitations exist for imaging highly structured surfaces like dense microvilli.
- AFM advances the understanding of membrane structure-function relationships, with potential for molecular resolution imaging.