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DNA flow cytometry on human epidermis: I. methodological studies on normal skin
The Journal of Investigative Dermatology
|March 1, 1980
Summary
This study adapted a hamster cheek pouch method for human epidermal cell DNA measurements using flow cytometry. The technique provides stable and accurate estimates of S and G2+M DNA phases, proving valuable for cell kinetic research.
Area of Science:
- Dermatology
- Cell Biology
- Biotechnology
Background:
- Flow cytometry is a powerful tool for cell analysis.
- Previous methods were successfully applied to hamster cheek pouch epithelium.
Purpose of the Study:
- To adapt and validate a flow cytometry method for single-cell DNA measurements in human epidermis.
- To assess the stability and accuracy of DNA content estimations in epidermal cells.
Main Methods:
- Adapted a hamster cheek pouch technique for human epidermal studies.
- Utilized flow cytometry for single-cell DNA measurements.
- Employed least squares estimation for statistical analysis of DNA frequency distribution.
Main Results:
- Epidermal cells showed S-phase DNA content at 3.0% +/- 0.6% and G2+M phase DNA content at 1.1% +/- 0.1%.
- No significant variations were observed across different experiments or with tissue storage up to 32 days in liquid nitrogen.
- Dermal tissue values were more variable but comparable in magnitude to epidermal values.
Conclusions:
- The adapted flow cytometry technique provides stable and accurate estimates of S and G2+M DNA fractions in human epidermis.
- This method serves as a valuable alternative or supplement to conventional cell kinetic methods.
- The technique's reliability is demonstrated by its consistency across experiments and storage conditions.