Optimization of cellular nucleotide extraction and sample preparation for nucleotide pool analyses using capillary...

Area of Science:

• Biochemistry
• Analytical Chemistry

Background:

• Nucleotide pool analysis is crucial for understanding cellular processes.
• Traditional methods using strong acids for cell extraction are time-consuming and complex.
• Capillary electrophoresis (CE) offers a sensitive platform for nucleotide analysis.

Purpose of the Study:

• To develop a faster and simpler method for cell extraction and sample preparation for nucleotide analysis.
• To optimize capillary electrophoresis conditions for simultaneous determination of multiple cellular nucleotides.
• To compare the efficiency of different volatile organic solvents for nucleotide extraction.

Main Methods:

• Volatile solvents (acetonitrile, ethanol, methanol) were tested for nucleotide extraction from mouse lymphoma cells.
• Temperature control was maintained throughout sample preparation to prevent nucleotide degradation.
• Capillary electrophoresis with borate and cyclodextrins in the background electrolyte was employed for nucleotide separation and quantification.
• Extracts were purified to remove proteins and large molecules to enhance reproducibility.

Main Results:

• Volatile solvents significantly simplified and accelerated cell extraction compared to traditional acid-based methods.
• Optimized extraction using 20-80% acetonitrile or 40-60% ethanol in water yielded high nucleotide recovery and reproducibility.
• The developed CE assay successfully determined 11 cellular nucleotides simultaneously.
• The assay met validation limits for biological fluid analysis.

Conclusions:

• Volatile solvent-based extraction is a superior alternative for nucleotide pool analysis.
• Optimized CE methods provide a robust and reproducible platform for simultaneous nucleotide quantification.
• This approach enhances efficiency and accuracy in cellular nucleotide analysis for biological research.