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Picogram per cell determination of DNA by flow cytofluorometry
Analytical Biochemistry
|February 1, 1984
Summary
This study presents a new method for quantifying DNA amounts per cell using enhanced 4
Area of Science:
- Molecular Biology
- Biochemistry
- Cell Biology
Background:
- Accurate DNA quantification is crucial for various biological studies.
- Existing methods may require large sample sizes or complex procedures.
Purpose of the Study:
- To develop a rapid, sensitive method for quantitative DNA determination per cell.
- To establish a reliable technique for DNA content analysis using flow cytometry.
Main Methods:
- Utilized enhanced fluorescence of 4',6-diamidino-2-phenylindole (DAPI) upon DNA binding.
- Developed a one-step nuclear isolation and DNA staining procedure.
- Employed flow cytometry for quantitative analysis.
Main Results:
- Successfully quantified DNA at the picogram level from small tissue samples (<0.2 g or 10^7 cells).
- Demonstrated comparable results for frozen and fresh tissues.
- Validated the method using chicken and trout erythrocyte nuclei as standards.
- Achieved consistent DNA content values across different tissues within the same organism.
Conclusions:
- The DAPI-based flow cytometry method provides accurate and sensitive DNA content determination.
- The technique is efficient, requiring minimal tissue and a streamlined protocol.
- This method is reliable for DNA measurement in various mammalian and fish species.