2013年5月14日 訊 /生物谷BIOON/ --近日,來自日本RIKEN研究中心的研究者通過研究,,鑒別出了亞洲人群和高加索人群中出現(xiàn)的和青少年原發(fā)性脊椎側(cè)彎(AIS, adolescent idiopathic scoliosis)發(fā)病相關(guān)的首個基因,,這個新發(fā)現(xiàn)的基因在個體兒童期主要參與脊柱的生長和發(fā)育,相關(guān)研究成果刊登于國際著名雜志Nature Genetics上,。
AIS是常見的兒童骨骼疾病,,影響著大約2%的學(xué)齡兒童的健康,引發(fā)兒童脊柱側(cè)凸的原因目前并不清楚,,進行支撐療法以及手術(shù)也是目前唯一的療法,,然而許多臨床和遺傳研究發(fā)現(xiàn)了引發(fā)這種疾病的一種遺傳因子。
為了深入理解引發(fā)脊柱側(cè)凸的原因以及其形成過程,,研究者通過研究發(fā)現(xiàn)了易感基因,,文章中,研究者通過對1819名遭受脊柱側(cè)凸影響的個體進行研究,,并且與25939名正常的個體進行對比,,最后研究者在6號染色體上發(fā)現(xiàn)了容易引發(fā)脊柱側(cè)凸的易感基因,而且這種基因也在漢族人和高加索人染色體中出現(xiàn),。
研究者表示,,這種易感基因名為GPR126,在軟骨中高度表達(dá),,抑制該基因表達(dá)可以導(dǎo)致發(fā)育中的脊柱出現(xiàn)生長遲緩以及骨組織形成遲緩的表現(xiàn),,GPR126在個體身高以及體長中發(fā)揮著關(guān)鍵作用。
研究者最后說道,,我們的研究發(fā)現(xiàn)揭示了GPR126不僅僅可以影響AIS的易感性,,而且可以通過異常的脊柱發(fā)育生長影響個體身高。未來的功能性研究將會闡明GPR126的改變?nèi)绾卧黾尤祟惢糀IS的風(fēng)險,。(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.