Protein fishing from single live cells.

Area of Science:

• Biophysics
• Proteomics
• Cell Biology

Background:

• Traditional intracellular protein analysis methods often require cell manipulation that compromises cell viability.
• Techniques like mass spectrometry and western blotting necessitate cell permeabilization or lysis.
• There is a need for methods that allow for the study of native proteins in live cells.

Purpose of the Study:

• To present a novel biophysical method for isolating native proteins from single mammalian cells.
• To enable quantitative detection of intracellular proteins without compromising cell viability.
• To facilitate spatiotemporally-controlled, live, single-cell proteomics.

Main Methods:

• Utilized a nanoaspirator for precise extraction of cytoplasmic or nuclear proteins.
• Developed a method for ex cellulo quantitative detection of isolated proteins.
• Maintained single mammalian cell viability throughout the protein extraction process.

Main Results:

• Successfully extracted native proteins from single mammalian cells using the nanoaspirator.
• Demonstrated that the method does not compromise cell viability.
• Enabled quantitative detection of proteins from live, single cells.

Conclusions:

• The nanoaspirator-based method offers a non-destructive approach to single-cell proteomics.
• This technique allows for live, quantitative analysis of intracellular proteins.
• Opens new avenues for spatiotemporally-controlled proteomic studies in live cells.