Pediatrics:父亲“缺席”影响孩子端粒长度!

2017-07-20 佚名 转化医学网

由于监禁、死亡、离婚等因素而失去父亲的陪伴会对一个正在成长发育的孩子的身心健康造成伤害。但是,关于父亲缺失和儿童身心健康之间生物学联系知之甚少。



由于监禁、死亡、离婚等因素而失去父亲的陪伴会对一个正在成长发育的孩子的身心健康造成伤害。但是,关于父亲缺失和儿童身心健康之间生物学联系知之甚少。

在“儿科”杂志7月18日发表的一项研究中,普林斯顿大学的一组研究人员报告说,父亲的缺失对染色体末端的端粒存在显着的不良影响9岁时失去父亲的儿童的端粒要比正常人短14%,且男孩反应要比女孩更为强烈

端粒可以反映细胞衰老和整体健康状况,它们的作用是保持染色体的完整性和控制细胞分裂周期。细胞每分裂一次,其端粒缩短一次;一旦端粒缩短到一定阈值,细胞就会停止复制。先前的研究表明,缩短的端粒与一系列疾病相关,包括心血管疾病和癌症

为了确定父亲缺失引起的压力是否对端粒长度造成影响,普林斯顿大学研究员和该研究的共同作者Daniel Notterman及其同事测量了端粒的长度,并分析了通过研究收集的其他数据。普林斯顿大学开展了一项有关不完整家庭儿童的研究,该研究对出生在美国的5000名儿童进行了跟踪调查。该研究收集了儿童身心健康、认知功能、社会情感技能、学习和生活条件以及家庭成分、稳定性和财政资源等信息。

然后,研究人员调查了这些儿童父亲缺失的原因,包括监禁、死亡、异地或离婚等。同时对缺失父亲的时间以及端粒长度是否受到其他因素的影响如收入进行了调查。

根据研究数据,研究人员确定父亲缺失与端粒的长度明确相关:出生后至9岁期间失去父亲会导致端粒长度减短,对因死亡而缺失父亲的儿童影响最大。研究人员推测,父亲的缺失可能是儿童的主要压力因素,例如离婚后家庭收入问题。

虽然没有确切的证据表明,端粒长度与儿童身心健康之间的关系因种族或民族而异,但他们确实发现了一些证据证明男孩对于父亲缺失或与父母的分离反应更为负面,这种反应体现为端粒长度缩短。

研究人员指出最令人惊讶的发现是,单亲对端粒长度的影响是由细胞的5-羟色胺转运体系中某些等位基因或遗传变异所介导的。

这些研究结果对公共政策的发展具有深远的影响。 研究人员指出:“父亲缺失确实存在实际可衡量的生物学后果,使得公共政策努力保持儿童和父亲之间的联系更加可信。”监禁惩罚父亲可能不仅对孩子的心灵和发展有影响,还可能对孩子的染色体保持其完整性的能力产生不可磨灭的影响。

研究人员Notterman 说:“我们都知道资源有限,并且变得越来越有限,但是,通过了解一种家庭现象-父亲缺失,具有与儿童身心健康相关联的生物学效应,我们现在有一个理由将资源优先分配给最脆弱的儿童。

原始出处:

Colter Mitchell et al. Father Loss and Child Telomere Length. Pediatrics (2017). DOI: 10.1542/peds.2016-3245.

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    2018-02-12 hbwxf
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    2017-08-09 feather89
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    2017-07-20 Chongyang Zhang

    签到学习了很多人

    0

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