Tissue disaggregation for flow cytometric DNA analysis: Comparison of fine-needle aspiration and an automated mechanical procedure
✍ Scribed by Gyda Lolk Ottesen; Ib Jarle Christensen; Jørgen K. Larsen; Bodil Hansen; Johan A. Andersen
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 406 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0196-4763
No coin nor oath required. For personal study only.
✦ Synopsis
Flow cytometric DNA analysis was performed on unfixed frozen samples from 56 breast cancer patients.
From each patient, two samples were analyzed. The only difference in the handling of the paired samples was the mechanical disaggregation of one sample by fine-needle aspiration compared to an automated mechanical disaggregation method (Medimachine) of the other sample. With the two methods for tissue disaggregation, the same resolution of the DNA histograms was obtained, indicated by median coefficients of variation (CV) of 1.5% for the DNA diploid GI peaks. Also, the frequencies of DNA diploid and aneuploid cases as well as the fractions of DNA aneuploid cells were comparable. This indicates that the two methods did not differ in ability to detect DNA aneuploid tumor clones. Automated mechanical disaggregation resulted in DNA histograms with significantly less debris and with lower S-phase fractions. In practice, the procedure of automated mechanical disaggregation was rapid, easy, and safer because of minimal handling of the unfixed tissue compared to the fine-needle aspiration.