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英研究称可基于DNA评估预期寿命

2019-01-16 13:07:00    新华网

新华社伦敦1月15日电(记者张家伟)英国爱丁堡大学15日发布一项研究说,通过分析DNA(脱氧核糖核酸)信息,理论上有可能预测一个人比平均寿命活得更长还是更短。但也有观点指出,寿命还受到环境等其他因素影响。

爱丁堡大学研究人员领衔的团队在美国《电子生命》期刊上报告说,他们分析了超过50万人的基因信息以及这些人父母的寿命记录,确认了人类基因组中12个对寿命有显著影响的区域,其中5个区域此前未被报告。研究发现,对寿命影响最显著的是与心脏病等致命疾病相关的基因区域。

根据上述发现,研究团队制作了一个评估预期寿命的打分系统。论文作者之一、爱丁堡大学的彼得·乔希解释说,如果找100个刚出生的婴儿,用这个打分系统将他们分成10组,那么得分最高组预计将比得分最低组平均多活5年。

有观点认为,除了遗传因素,还有环境等其他影响人类寿命的因素。研究人员说,他们只是给出了一个评估尝试,并不意味着能以此清晰判断某个人实际寿命的长短。

研究人员还希望找到直接影响人们衰老速度的基因,但在这次研究中没有发现相关的确切证据。下一步,他们计划扩大研究规模,希望能找到导致衰老和疾病的关键基因机制。

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