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Measuring Plasma Membrane Protein Endocytic Rates by Reversible Biotinylation
Published on: December 23, 2009
Direct evaluation of cellular internalization rates using chromogenic disulfides.
Megan E Bucks1, Sergey N Savinov
1Department of Chemistry, Purdue University, West Lafayette, IN 47909, USA.
Molecular Biosystems
|April 21, 2010
Summary
A new assay tracks how molecules enter cells in real time by monitoring cellular redox balance. This method uses chromogenic disulfide derivatives to measure relative internalization rates in live cells.
Area of Science:
- Biochemistry
- Cell Biology
- Analytical Chemistry
Background:
- Maintaining cytoplasmic redox balance is crucial for cellular function.
- Accurate measurement of molecular internalization is vital for drug delivery and cellular studies.
- Existing methods for assessing internalization can be complex or lack real-time capabilities.
Purpose of the Study:
- To develop a practical, real-time assay for measuring relative cellular internalization rates.
- To utilize the principle of cytoplasmic redox balance for assay development.
- To apply the assay to molecules derivatized as chromogenic disulfides.
Main Methods:
- Development of a novel assay based on cytoplasmic redox balance.
- Derivatization of molecules of interest as chromogenic disulfides.
- Real-time monitoring of cellular responses using the developed assay.
Main Results:
- The assay successfully reports on relative cellular internalization rates.
- The method functions in real time, providing dynamic data.
- The assay is practical and exploits the maintenance of cytoplasmic redox balance.
Conclusions:
- A new, practical assay for real-time measurement of molecular internalization has been established.
- The assay leverages cellular redox balance, offering a novel approach.
- This method provides a valuable tool for studying molecule uptake in live cells.
