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Evaluation of 5-methyl-2′-deoxycytidine stability in hydrolyzed and nonhydrolyzed DNA by HPLC-UV

机译:高效液相色谱-紫外光谱法评估水解和未水解DNA中5-甲基-2'-脱氧胞苷的稳定性

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Background: Although the determination of 5-methyl-2′-deoxycytidine (5-MedC) in various biological samples is gaining increasing scientific interest, there are no data available regarding its stability. Results: We have currently evaluated the stability of 5-MedC and 2′-deoxycytidine (dC) at -20°C, both in hydrolyzed and nonhydrolyzed calf thymus DNA (CT DNA), as well as following repetitive freeze-thaw cycles. HPLC-UV was used for the accurate determination of the two 2′-deoxynucleosides. Statistical evaluation of the results revealed that 5-MedC and dC were stable in hydrolyzed CT DNA for at least 7 days and in nonhydrolyzed CT DNA for at least 65 days, when these were stored at -20°C. Furthermore, both 2′-deoxynucleosides were stable for at least three repetitive freeze-thaw cycles. Conclusion: By using HPLC-UV, we have evaluated the stability of 5-MedC and dC under storage conditions and repetitive freeze-thaw cycles. Our results are informative about the way samples should be handled and stored in epigenetic studies.
机译:背景:尽管测定各种生物样品中的5-甲基-2'-脱氧胞苷(5-MedC)越来越引起科学兴趣,但尚无关于其稳定性的数据。结果:我们目前已评估了在-20°C下5-MedC和2'-脱氧胞苷(dC)在水解和未水解小牛胸腺DNA(CT DNA)中以及在重复的冻融循环后的稳定性。 HPLC-UV用于准确测定两个2'-脱氧核苷。结果的统计评估表明,当将它们存储在-20°C时,5-MedC和dC在水解的CT DNA中稳定至少7天,在非水解的CT DNA中稳定至少65天。此外,两个2'-脱氧核苷在至少三个重复的冻融循环中均稳定。结论:通过HPLC-UV,我们评估了5-MedC和dC在储存条件和重复冻融循环下的稳定性。我们的结果提供了有关表观遗传研究中样品处理和储存方式的信息。

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