A hybrid scanning force and light microscope for surface imaging and three-dimensional optical sectioning in...

Area of Science:

• Biophysics
• Cell Biology
• Microscopy

Background:

• Studying living cells requires advanced imaging techniques to correlate surface properties with internal dynamics.
• Existing methods often necessitate specimen manipulation, limiting real-time observation.
• Integrating multiple microscopy modalities presents a challenge in instrument design.

Purpose of the Study:

• To present the design and application of a novel scanned-cantilever force microscope integrated with an inverted light microscope.
• To enable simultaneous acquisition of force microscopy and high-resolution optical sections (DIC/polarization) from living cells.
• To provide a versatile platform for investigating the relationship between cell surface mechanics and intracellular organization.

Main Methods:

• Integration of a scanned-cantilever force microscope with a high-resolution inverted light microscope.
• Simultaneous imaging capabilities using differential interference contrast (DIC) or polarization microscopy.
• Development of a hybrid system allowing force microscopy and optical sectioning without specimen translation or microscope removal.

Main Results:

• The hybrid microscope reliably acquires thin optical sections and force data concurrently.
• The instrument facilitates the study of dynamic three-dimensional organization within living cells.
• It is the first instrument capable of combined force microscopy and high-power DIC imaging without specimen manipulation.

Conclusions:

• The developed hybrid microscope offers a unique and versatile platform for biological research.
• This integrated system enhances the study of cell surface properties and their influence on intracellular dynamics.
• Adaptation of these design principles can improve the biological applicability of other force microscopes.