目的依据血浆中存在游离DNA的理论,采用磁珠作为固相吸附载体并使用特定设计的试剂体系及提取流程,建立一种简便、高效提取尿液样本中游离甲基化DNA的方法,评价其作为用于尿液样本的甲基化基因检测技术的可行性。方法使用磁珠法提取40...目的依据血浆中存在游离DNA的理论,采用磁珠作为固相吸附载体并使用特定设计的试剂体系及提取流程,建立一种简便、高效提取尿液样本中游离甲基化DNA的方法,评价其作为用于尿液样本的甲基化基因检测技术的可行性。方法使用磁珠法提取40例成人尿液中游离甲基化DNA,进行甲基化修饰后,紫外分光光度计测定DNA的浓度和纯度。结果结果显示,提取50 m L尿液可得61~200 ng/μL的甲基化DNA,OD260/280为1.8±0.05。使用甲基化阳性对照DNA引物进行PCR及电泳后可见目的条带,说明其纯度可以满足后续甲基化基因检测和PCR等操作要求。结论尿液中确实存在游离甲基化DNA,同时磁珠法提取尿液游离DNA提取过程简单,且提取纯度高,是一种高效的提取方法。展开更多
研究证实,在基因的表观遗传调控中DNA甲基化起着至关重要的作用。而DNA甲基转移酶(DNMT)催化DNA甲基化,这是DNA甲基化模式形成和保持的必要条件。在哺乳动物细胞中,有三种关键的DNMT负责着不同的任务。首先是DNMT1,负责维持DNA的甲基化...研究证实,在基因的表观遗传调控中DNA甲基化起着至关重要的作用。而DNA甲基转移酶(DNMT)催化DNA甲基化,这是DNA甲基化模式形成和保持的必要条件。在哺乳动物细胞中,有三种关键的DNMT负责着不同的任务。首先是DNMT1,负责维持DNA的甲基化状态,保持细胞功能正常运转。而另外两种则是DNMT3a和DNMT3b,它们则负责推动DNA从头开始的甲基化过程。目前,急性髓系白血病(AML)的病因仍无法完全阐明。通过研究发现,异常的表观遗传学变化与AML的发病密切相关。深入探讨DNA甲基化与AML之间的联系,将为治疗这种疾病和开发新药物提供关键的分子靶点。这一领域的突破将为医学界带来新的希望,为患者提供更有效的治疗方案。Research has confirmed that DNA methylation plays a crucial role in the epigenetic regulation of genes. DNA methyltransferase (DNMT) catalyzes DNA methylation, which is a necessary condition for the formation and maintenance of DNA methylation patterns. In mammalian cells, there are three key DNMTs responsible for different tasks. Firstly, DNMT1 is responsible for maintaining the methylation status of DNA and ensuring the normal functioning of cells. The other two are DNMT3a and DNMT3b, which are responsible for driving the DNA methylation process from scratch. At present, the etiology of acute myeloid leukemia (AML) cannot be fully elucidated. Through research, it has been found that abnormal epigenetic changes are closely related to the onset of AML. Exploring the relationship between DNA methylation and AML in depth will provide key molecular targets for the treatment of this disease and the development of new drugs. Breakthroughs in this field will bring new hope to the medical community and provide more effective treatment options for patients.展开更多
文摘目的依据血浆中存在游离DNA的理论,采用磁珠作为固相吸附载体并使用特定设计的试剂体系及提取流程,建立一种简便、高效提取尿液样本中游离甲基化DNA的方法,评价其作为用于尿液样本的甲基化基因检测技术的可行性。方法使用磁珠法提取40例成人尿液中游离甲基化DNA,进行甲基化修饰后,紫外分光光度计测定DNA的浓度和纯度。结果结果显示,提取50 m L尿液可得61~200 ng/μL的甲基化DNA,OD260/280为1.8±0.05。使用甲基化阳性对照DNA引物进行PCR及电泳后可见目的条带,说明其纯度可以满足后续甲基化基因检测和PCR等操作要求。结论尿液中确实存在游离甲基化DNA,同时磁珠法提取尿液游离DNA提取过程简单,且提取纯度高,是一种高效的提取方法。
文摘研究证实,在基因的表观遗传调控中DNA甲基化起着至关重要的作用。而DNA甲基转移酶(DNMT)催化DNA甲基化,这是DNA甲基化模式形成和保持的必要条件。在哺乳动物细胞中,有三种关键的DNMT负责着不同的任务。首先是DNMT1,负责维持DNA的甲基化状态,保持细胞功能正常运转。而另外两种则是DNMT3a和DNMT3b,它们则负责推动DNA从头开始的甲基化过程。目前,急性髓系白血病(AML)的病因仍无法完全阐明。通过研究发现,异常的表观遗传学变化与AML的发病密切相关。深入探讨DNA甲基化与AML之间的联系,将为治疗这种疾病和开发新药物提供关键的分子靶点。这一领域的突破将为医学界带来新的希望,为患者提供更有效的治疗方案。Research has confirmed that DNA methylation plays a crucial role in the epigenetic regulation of genes. DNA methyltransferase (DNMT) catalyzes DNA methylation, which is a necessary condition for the formation and maintenance of DNA methylation patterns. In mammalian cells, there are three key DNMTs responsible for different tasks. Firstly, DNMT1 is responsible for maintaining the methylation status of DNA and ensuring the normal functioning of cells. The other two are DNMT3a and DNMT3b, which are responsible for driving the DNA methylation process from scratch. At present, the etiology of acute myeloid leukemia (AML) cannot be fully elucidated. Through research, it has been found that abnormal epigenetic changes are closely related to the onset of AML. Exploring the relationship between DNA methylation and AML in depth will provide key molecular targets for the treatment of this disease and the development of new drugs. Breakthroughs in this field will bring new hope to the medical community and provide more effective treatment options for patients.
