Application of the Microcomputer in Multiparametric Fluorescence Cytophotometry ¹

Area of Science:

• Cell Biology
• Biotechnology
• Biophysics

Background:

• Accurate cell cycle analysis is crucial for understanding cellular processes and disease.
• Multiparametric flow cytometry offers a powerful approach for detailed cellular analysis.

Purpose of the Study:

• To develop and validate a combined cytofluorometric method for simultaneous DNA and other cellular parameter measurements.
• To assess the accuracy of this method for determining DNA cell cycle phases in fetal mouse hepatocytes.

Main Methods:

• Utilized a fluorescence cytophotometer (BH2-QRFL, Olympus) with multiple filter sets and computer control (HP-85F).
• Performed Feulgen staining for DNA measurement on fetal mouse hepatocytes.
• Combined DNA content analysis with other parameters like proteins or enzyme activity.
• Employed two-dimensional scatter plots and frequency distribution histograms for data visualization and analysis.

Main Results:

• The developed method enabled multiparametric measurements and efficient data processing.
• Computer analysis of DNA histograms provided accurate cell cycle phase fraction sizes (G1, S, G2+M).
• Results showed good correlation with simultaneously performed tritiated thymidine (3H-TdR) autoradiography.

Conclusions:

• The combined cytofluorometric method is effective for multiparametric analysis of cellular DNA and other components.
• This technique provides a reliable and efficient alternative for cell cycle phase determination.
• The study validates the use of advanced cytometry and computer analysis in cell biology research.