Journal
EPIGENOMICS
Volume 10, Issue 6, Pages 797-811Publisher
FUTURE MEDICINE LTD
DOI: 10.2217/epi-2018-0025
Keywords
methylation profiles; stability; storage conditions
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Funding
- American Heart Association [15SFRN23910002]
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Aim: To test whether DNA samples stored for a prolonged period (20 years) under various storage conditions could be used for comparative methylation studies using reduced representation bisulfite sequencing. Patients & methods: Five groups of human blood DNA samples (n = 5-6/group) were compared. The groupings were based on the anticoagulant used and storage temperature and duration. Results: Methylation profiles of defined genomic regions in the DNA or blood samples archived for 20 years were similar across all storage temperatures, including 4 degrees C. The level of intersample similarity in archived samples was not significantly different than that in recently collected samples. Conclusion: Archived samples, including DNA stored at 4 degrees C for 20 years, are suitable for comparative studies of DNA methylation.
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