Image cytometry DNA ploidy analysis: Correlation between two semi-automated methods

Area of Science:

• Biotechnology
• Molecular Biology
• Cancer Research

Background:

• DNA ploidy analysis is a long-established prognostic technique.
• Limited commercially available systems offer quality assurance and outcome data.
• Automated systems for DNA ploidy require comparative validation.

Purpose of the Study:

• To compare the performance of two automated DNA ploidy analysis systems: Fairfield and Ploidy Work Station (PWS).
• To evaluate system differences in nuclei identification, coefficient of variation (CV), 5c exceeding rate (5CER), and diagnostic concordance.

Main Methods:

• Nuclear monolayers from 112 oral biopsies were prepared using enzyme digestion and Feulgen staining.
• Samples were scanned on both Fairfield and PWS systems.
• Ploidy diagnosis, nuclei count, CV, and 5CER were statistically compared.

Main Results:

• PWS identified significantly more nuclei (p < 0.0001) with a lower CV (p < 0.0001).
• Fewer samples were classified as indeterminate using the PWS system.
• Complete concordance in DNA ploidy diagnosis was observed between the two systems; no significant difference in 5CER was found.

Conclusions:

• The PWS system demonstrates comparable performance to the Fairfield system for DNA ploidy determination.
• PWS offers potential advantages, including increased nuclei identification and reduced indeterminate classifications.
• The findings suggest PWS may offer improved performance for DNA content quantitation.