Separation of viable from nonviable cells using a discontinuous density gradient

Area of Science:

• Cell biology
• Biotechnology
• Bioprocessing

Background:

• Cell viability assessment is crucial in biological research and biopharmaceutical development.
• Distinguishing between viable and nonviable cells is essential for accurate experimental outcomes and product quality.

Purpose of the Study:

• To develop and validate a method for separating viable from nonviable cells using density gradient centrifugation.
• To demonstrate the utility of the separated viable cells in subsequent cell culture applications.

Main Methods:

• A suspension of mixed viable and nonviable cells was prepared.
• The cell suspension was layered over a dense Ficoll-Paque solution.
• Centrifugation was performed to separate the cell populations based on density.

Main Results:

• Viable cells were predominantly retained at the interface above the Ficoll-Paque solution.
• Nonviable cells were found distributed in other fractions after centrifugation.
• The recovered viable cells from the interface supported subsequent growth in cell culture.

Conclusions:

• Ficoll-Paque density centrifugation is an effective method for separating viable and nonviable cells.
• This technique yields a population of viable cells suitable for further biological applications, such as cell culture.