Subcellular Fractionation of Hela Cells for Lysosome Enrichment Using a Continuous Percoll-Density Gradient

Area of Science:

• Cell Biology
• Biochemistry
• Subcellular Fractionation

Background:

• Lysosome enrichment is crucial for studying their structure and function.
• Current methods like immunoprecipitation require genetic modification, while differential density separation offers a simpler alternative.
• Subcellular organelles possess characteristic densities, enabling separation via density gradients.

Purpose of the Study:

• To develop and optimize a straightforward protocol for lysosome enrichment from HeLa cells.
• To utilize differential organelle density for isolating intact lysosomes in their native state.
• To provide a quick and scalable method for lysosome isolation.

Main Methods:

• Utilized a continuous density gradient containing Percoll for organelle separation.
• Employed gentle cell lysis and extraction conditions to preserve lysosome integrity.
• Fractionated cellular components based on density to isolate lysosomes.

Main Results:

• Achieved enriched fractions containing functional and intact lysosomes from HeLa cells.
• The isolation protocol is rapid, completed in under 2 hours post-cell harvesting.
• The method demonstrated scalability and potential for optimization in other cell types.

Conclusions:

• The Percoll density gradient method offers an efficient and simple approach for lysosome enrichment.
• Isolated lysosomes are suitable for downstream functional and structural analyses.
• This protocol provides a valuable tool for researchers studying lysosome biology.