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Analytical performance of cfDNA quantification methods in pediatric acute lymphoblastic leukemia plasma
Gulshan Rohilla1, Alka Yadav2, Anuradha Sharma1
1Department of Genetics, Maharshi Dayanand University, Rohtak, Haryana, India.
Summary
Analytical methods significantly impact cell-free DNA (cfDNA) measurements in pediatric acute lymphoblastic leukemia (ALL) patients. Choosing the right cfDNA quantification technique is crucial for accurate cancer biomarker application.
Area of Science:
- Oncology
- Biochemistry
- Molecular Diagnostics
Background:
- Cell-free DNA (cfDNA) shows promise as a noninvasive cancer biomarker.
- Analytical variability in cfDNA measurement can limit its clinical utility.
Purpose of the Study:
- To evaluate the analytical performance of different cfDNA quantification methods.
- To assess cfDNA measurement techniques in plasma from pediatric acute lymphoblastic leukemia (ALL) patients.
Main Methods:
- Plasma samples from 1500 pediatric ALL patients (ages 4-13) were analyzed.
- cfDNA was extracted using a commercial kit and a phenol-chloroform method.
- Concentration was measured by fluorimetry, spectrophotometry, and ELISA; cfDNA detection used PTEN gene PCR.
Main Results:
- Fluorometry yielded lower cfDNA concentrations than spectrophotometry, indicating nonspecificity.
- ELISA provided consistent signals but was an indirect quantification method.
- Kit-based extraction yielded purer cfDNA suitable for PCR compared to manual extraction.
Conclusions:
- Analytical methodology significantly influences cfDNA quantitation results in pediatric ALL.
- Standardization of cfDNA measurement techniques is essential for reliable biomarker application.
