Nature Genetics:全基因组关联研究发现脂代谢异常
由慕尼黑亥姆霍兹中心的生物信息学教授Karsten Suhre领导的慕尼黑亥姆霍兹中心生物信息与系统生物学研究所和慕尼黑大学的研究人员运用全基因组关联研究(GWAS)发现可能与脂代谢异常相关的9个基因的突变,该项研究成果发表在Nature Genetics杂志上。
研究概况:
研究人员检测了1809个KORA群体研究(一项德国的基于群体调查研究的流行病学、健康经济学和卫生保健研究领域的研究平台)的参与者血样中163个代谢产物的浓度,由此产生的代谢谱被用来进行基因组范围的相关性研究,以寻找共同的基因突变,并在422个英国人中做了验证。研究人员发现在9个具有重复多态性的基因中,8个基因(FADS1, ELOVL2, ACADS, ACADM, ACADL, SPTLC3, ETFDH, and SLC16A9)的突变位于编码酶或溶质运输者的基因的内部或周围,这些基因的功能和相应的代谢性状匹配。此外研究人员还发现5个位点(SLC22A4, CPS1, PLEKHH1, SYNE2, and PHGDH),其中的4个的突变位于编码酶或溶质运输者的基因的内部或周围,其相应的代谢性状和蛋白的功能匹配。SLC22A4位点和克隆病有关,FADSI和多动症、高胆固醇、高甘油三脂有关。他们还证实了MTNR1B和GCKR(糖尿病的相关基因)的相关性。
专家点评:
该研究极大促进了早期诊断标志物的寻找和严重代谢疾病的治疗。与大多数基因组范围相关性研究不同的是,对代谢性状来说,大多数相关性与具有相应代谢功能基因的突变有关;另外,随着更多代谢谱数据的产生,人类代谢的遗传突变相关性研究将进一步发展。
参考文献:
Thomas Illig, Christian Gieger, Guangju Zhai, et al.A genome-wide perspective of genetic variation in human metabolism. Nat Genet,42,137-141(2010)
Abstract
Serum metabolite concentrations provide a direct readout of biological processes in the human body, and they are associated with disorders such as cardiovascular and metabolic diseases. We present a genome-wide association study (GWAS) of 163 metabolic traits measured in human blood from 1,809 participants from the KORA population, with replication in 422 participants of the TwinsUK cohort. For eight out of nine replicated loci (FADS1, ELOVL2, ACADS, ACADM, ACADL, SPTLC3, ETFDH and SLC16A9), the genetic variant is located in or near genes encoding enzymes or solute carriers whose functions match the associating metabolic traits. In our study, the use of metabolite concentration ratios as proxies for enzymatic reaction rates reduced the variance and yielded robust statistical associations with P values ranging from 3 × 10-24 to 6.5 × 10-179. These loci explained 5.6%–36.3% of the observed variance in metabolite concentrations. For several loci, associations with clinically relevant parameters have been reported previously.