Novel method for DNA methylation analysis using high-performance liquid chromatography and its clinical application.

Area of Science:

• Biochemistry
• Analytical Chemistry
• Molecular Diagnostics

Background:

• DNA methylation is crucial in cancer development and progression.
• Accurate and efficient DNA methylation detection is vital for clinical diagnostics.
• Current methods for DNA methylation analysis can be time-consuming and require extensive sample preparation.

Purpose of the Study:

• To develop a novel, rapid, and clinically applicable methodology for DNA methylation diagnostics.
• To demonstrate the utility of the developed method in identifying a specific cancer biomarker.
• To assess the correlation between DNA methylation status and clear cell renal cell carcinoma (ccRCC) clinicopathological features and survival outcomes.

Main Methods:

• Development of a new anion-exchange column for high-performance liquid chromatography (HPLC) with combined electrostatic and hydrophobic properties.
• Quantification of DNA methylation levels by capturing and discriminating between methylated (cytosine) and unmethylated (thymine) DNA bases.
• Analysis of the FAM150A gene methylation status in 98 ccRCC patient tumor samples.

Main Results:

• The developed HPLC method accurately and reproducibly quantified DNA methylation in synthetic DNA within 10 minutes, independent of methylation distribution.
• Bulk tumor specimens from ccRCC patients were easily identifiable by DNA methylation status of the FAM150A gene, even with low cancer cell content.
• Increased FAM150A gene methylation in ccRCC correlated with aggressive clinicopathological parameters and poorer recurrence-free and overall survival rates.

Conclusions:

• The novel HPLC method provides a powerful tool for DNA methylation diagnostics.
• This technique enables rapid and accurate assessment of DNA methylation in clinical settings.
• HPLC-based DNA methylation analysis can serve as a valuable prognostic marker for ccRCC patients.