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Genome-wide analysis indicates association between heterozygote advantage and healthy aging in humans.
BMC Genetics ( IF 2.9 ) Pub Date : 2019-07-02 , DOI: 10.1186/s12863-019-0758-4
Ke Xu 1, 2, 3, 4 , Roman Kosoy 1, 2 , Khader Shameer 1, 2, 3, 5 , Sudhir Kumar 6, 7, 8 , Li Liu 9 , Ben Readhead 1, 2, 3, 10 , Gillian M Belbin 1, 2, 11 , Hao-Chih Lee 1, 2, 3 , Rong Chen 1, 2 , Joel T Dudley 1, 2, 3
Affiliation  

BACKGROUND Genetic diversity is known to confer survival advantage in many species across the tree of life. Here, we hypothesize that such pattern applies to humans as well and could be a result of higher fitness in individuals with higher genomic heterozygosity. RESULTS We use healthy aging as a proxy for better health and fitness, and observe greater heterozygosity in healthy-aged individuals. Specifically, we find that only common genetic variants show significantly higher excess of heterozygosity in the healthy-aged cohort. Lack of difference in heterozygosity for low-frequency variants or disease-associated variants excludes the possibility of compensation for deleterious recessive alleles as a mechanism. In addition, coding SNPs with the highest excess of heterozygosity in the healthy-aged cohort are enriched in genes involved in extracellular matrix and glycoproteins, a group of genes known to be under long-term balancing selection. We also find that individual heterozygosity rate is a significant predictor of electronic health record (EHR)-based estimates of 10-year survival probability in men but not in women, accounting for several factors including age and ethnicity. CONCLUSIONS Our results demonstrate that the genomic heterozygosity is associated with human healthspan, and that the relationship between higher heterozygosity and healthy aging could be explained by heterozygote advantage. Further characterization of this relationship will have important implications in aging-associated disease risk prediction.

中文翻译:

全基因组分析表明杂合子优势与人类健康衰老之间的关联。

背景技术已知遗传多样性赋予整个生命树许多物种以生存优势。在这里,我们假设这种模式也适用于人类,并且可能是基因组杂合度较高的个体适应性更高的结果。结果我们以健康的衰老为代表,以改善健康状况和健康状况,并观察到健康年龄个体的杂合性更高。具体而言,我们发现在健康年龄组中,只有常见的遗传变异显示出明显更高的杂合度。低频变异或与疾病相关的变异的杂合度缺乏差异,因此排除了对有害隐性等位基因进行补偿的可能性。此外,在健康年龄组中,编码具有最高杂合度过量SNP的SNP富含与细胞外基质和糖蛋白有关的基因,这是一组已知处于长期平衡选择下的基因。我们还发现,个体杂合率是基于电子健康记录(EHR)的男性(而不是女性)10年生存率估计的重要预测指标,原因包括年龄和种族。结论我们的结果表明,基因组杂合性与人类健康有关,杂合子优势可以解释较高杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。一组已知处于长期平衡选择状态的基因。我们还发现,个体杂合率是基于电子健康记录(EHR)的男性(而不是女性)10年生存率估计的重要预测指标,原因包括年龄和种族。结论我们的结果表明,基因组杂合性与人类健康有关,杂合子优势可以解释较高杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。一组已知处于长期平衡选择状态的基因。我们还发现,个体杂合率是基于电子健康记录(EHR)的男性(而不是女性)10年生存率估计的重要预测指标,原因包括年龄和种族。结论我们的结果表明,基因组杂合性与人类健康有关,杂合子优势可以解释较高杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。我们还发现,个体杂合率是基于电子健康记录(EHR)的男性(而不是女性)10年生存率估计的重要预测指标,原因包括年龄和种族。结论我们的结果表明,基因组杂合性与人类健康有关,杂合子优势可以解释较高杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。我们还发现,个体杂合率是基于电子健康记录(EHR)的男性(而不是女性)10年生存率估计的重要预测指标,原因包括年龄和种族。结论我们的结果表明,基因组杂合性与人类健康有关,杂合子优势可以解释较高杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。杂合子优势可以解释较高的杂合子与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。杂合子优势可以解释较高的杂合性与健康衰老之间的关系。这种关系的进一步表征将对与衰老相关的疾病风险预测产生重要影响。
更新日期:2019-07-02
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