2013年5月14日 讯 /生物谷BIOON/ --近日,来自日本RIKEN研究中心的研究者通过研究,鉴别出了亚洲人群和高加索人群中出现的和青少年原发性脊椎侧弯(AIS, adolescent idiopathic scoliosis)发病相关的首个基因,这个新发现的基因在个体儿童期主要参与脊柱的生长和发育,相关研究成果刊登于国际著名杂志Nature Genetics上。
AIS是常见的儿童骨骼疾病,影响着大约2%的学龄儿童的健康,引发儿童脊柱侧凸的原因目前并不清楚,进行支撑疗法以及手术也是目前唯一的疗法,然而许多临床和遗传研究发现了引发这种疾病的一种遗传因子。
为了深入理解引发脊柱侧凸的原因以及其形成过程,研究者通过研究发现了易感基因,文章中,研究者通过对1819名遭受脊柱侧凸影响的个体进行研究,并且与25939名正常的个体进行对比,最后研究者在6号染色体上发现了容易引发脊柱侧凸的易感基因,而且这种基因也在汉族人和高加索人染色体中出现。
研究者表示,这种易感基因名为GPR126,在软骨中高度表达,抑制该基因表达可以导致发育中的脊柱出现生长迟缓以及骨组织形成迟缓的表现,GPR126在个体身高以及体长中发挥着关键作用。
研究者最后说道,我们的研究发现揭示了GPR126不仅仅可以影响AIS的易感性,而且可以通过异常的脊柱发育生长影响个体身高。未来的功能性研究将会阐明GPR126的改变如何增加人类患AIS的风险。(生物谷Bioon.com)
doi:10.1038/ng.2639
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Genetic variants in GPR126 are associated with adolescent idiopathic scoliosis
Ikuyo Kou, Yohei Takahashi, Todd A Johnson, Atsushi Takahashi, Long Guo, Jin Dai, Xusheng Qiu, Swarkar Sharma, Aki Takimoto, Yoji Ogura, Hua Jiang, Huang Yan, Katsuki Kono, Noriaki Kawakami, Koki Uno, Manabu Ito, Shohei Minami, Haruhisa Yanagida, Hiroshi Taneichi, Naoya Hosono, Taichi Tsuji, Teppei Suzuki, Hideki Sudo, Toshiaki Kotani, Ikuho Yonezawa et al.
Adolescent idiopathic scoliosis (AIS) is the most common pediatric skeletal disease1. We previously reported a locus on chromosome 10q24.31 associated with AIS susceptibility in Japanese using a genome-wide association study (GWAS) consisting of 1,033 cases and 1,473 controls2. To identify additional AIS-associated loci, we expanded the study by adding X-chromosome SNPs in the GWAS and increasing the size of the replication cohorts. Through a stepwise association study including 1,819 cases and 25,939 controls, we identified a new susceptibility locus on chromosome 6q24.1 in Japanese (P = 2.25 × 10−10; odds ratio (OR) = 1.28). The most significantly associated SNP, rs6570507, was in GPR126 (encoding G protein–coupled receptor 126). Its association was replicated in Han Chinese and European-ancestry populations (combined P = 1.27 × 10−14; OR = 1.27). GPR126 was highly expressed in cartilage, and the knockdown of gpr126 in zebrafish caused delayed ossification of the developing spine. Our results should provide insights into the etiology and pathogenesis of AIS.