ADAMTS19缺失導致進展性非症候群性心臟瓣膜病
作者:
小柯機器人發布時間:2019/12/18 13:53:14
加拿大蒙特婁大學Gregor Andelfinger研究小組取得一項新進展,他們近期研究發現了ADAMTS19基因的丟失導致進展性非症候群性心臟瓣膜疾病。相關論文2019年12月16日在線發表於國際學術期刊《自然—遺傳學》。
研究人員表示,約有2%的人患有瓣膜性心臟病。儘管最初的觀察通常位於局部(例如主動脈瓣或二尖瓣),但在其他瓣膜中定期觀察到疾病表現,並且患者經常需要手術。儘管心臟瓣膜疾病的發病率很高,但迄今為止,僅有少數基因被確定為該疾病的單基因病因。
研究人員確定了兩個近親家庭,每個家庭都有兩個受影響的家庭成員,他們在生命的早期就出現了進行性心臟瓣膜疾病。全外顯子組測序顯示,在所有四個受影響的個體中,ADAMTS19中的純合子均被截斷成了無意義的等位基因。Adamts19的純合基因敲除小鼠顯示主動脈瓣功能障礙,概括了人類表型的各個方面。使用lacZ報告基因和單細胞RNA測序進行的表達分析突出了Adamts19作為瓣膜間質細胞的新標記; 瓣膜間質細胞中基因調控網絡的推論將Adamts19置於Wnt信號通路下遊的轉錄因子淋巴增強劑結合因子1驅動的高度區分性網絡中。在Adamts19基因敲除小鼠中,心內膜Krüppel樣因子2的上調先於血液動力改變,表明Wnt–Adamts19–Klf2信號軸上的緊密平衡對於適當的瓣膜成熟和維持是必需的。
附:英文原文
Title: Loss of ADAMTS19 causes progressive non-syndromic heart valve disease
Author: Florian Wnnemann, Asaf Ta-Shma, Christoph Preuss, Severine Leclerc, Patrick Piet van Vliet, Andrea Oneglia, Maryse Thibeault, Emily Nordquist, Joy Lincoln, Franka Scharfenberg, Christoph Becker-Pauly, Philipp Hofmann, Kirstin Hoff, Enrique Audain, Hans-Heiner Kramer, Wojciech Makalowski, Amiram Nir, Sebastian S. Gerety, Matthew Hurles, Johanna Comes, Anne Fournier, Hanna Osinska, Jeffrey Robins, Michel Pucat, Orly Elpeleg, Marc-Phillip Hitz, Gregor Andelfinger
Issue&Volume: 2019-12-16
Abstract: Valvular heart disease is observed in approximately 2% of the general population1. Although the initial observation is often localized (for example, to the aortic or mitral valve), disease manifestations are regularly observed in the other valves and patients frequently require surgery. Despite the high frequency of heart valve disease, only a handful of genes have so far been identified as the monogenic causes of disease2,3,4,5,6,7. Here we identify two consanguineous families, each with two affected family members presenting with progressive heart valve disease early in life. Whole-exome sequencing revealed homozygous, truncating nonsense alleles in ADAMTS19 in all four affected individuals. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype. Expression analysis using a lacZ reporter and single-cell RNA sequencing highlight Adamts19 as a novel marker for valvular interstitial cells; inference of gene regulatory networks in valvular interstitial cells positions Adamts19 in a highly discriminatory network driven by the transcription factor lymphoid enhancer-binding factor 1 downstream of the Wnt signaling pathway. Upregulation of endocardial Krüppel-like factor 2 in Adamts19 knockout mice precedes hemodynamic perturbation, showing that a tight balance in the Wnt–Adamts19–Klf2 axis is required for proper valve maturation and maintenance.
DOI: 10.1038/s41588-019-0536-2
Source: https://www.nature.com/articles/s41588-019-0536-2