Integrated genomic approaches implicate osteoglycin (Ogn) in the regulation of left ventricular mass.

Integrated genomic approaches implicate osteoglycin (Ogn) in the regulation of left ventricular mass.
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综合基因组方法暗示骨甘氨酸(OGN)在左心室肿块的调节中。

DOI:
10.1038/ng.134
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发表时间:
2008-05
期刊:
影响因子:
30.8
通讯作者:
Cook, Stuart A.
Cook, Stuart A.
中科院分区:
生物学1区
文献类型:
--
作者:
Petretto, Enrico;Sarwar, Rizwan;Grieve, Ian;Lu, Han;Kumaran, Mande K.;Muckett, Phillip J.;Mangion, Jonathan;Schroen, Blanche;Benson, Matthew;Punjabi, Prakash P.;Prasad, Sanjay K.;Pennell, Dudley J.;Kiesewetter, Chris;Tasheva, Elena S.;Corpuz, Lolita M.;Webb, Megan D.;Conrad, Gary W.;Kurtz, Theodore W.;Kren, Vladimir;Fischer, Judith;Hubner, Norbert;Pinto, Yigal M.;Pravenec, Michal;Aitman, Timothy J.;Cook, Stuart A.

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左心室质量(LVM)和心脏基因表达是受心脏内在和外在因素调控的复杂性状。为了剖析LVM的主要决定因素,我们对大鼠的心脏转录组进行了表达数量性状基因座和数量性状转录本(QTT)分析。利用这些方法以及体外功能测定,我们确定骨甘氨酸蛋白聚糖(Ogn)是大鼠LVM的一个主要候选调节因子,Ogn蛋白表达增加与LVM升高相关。我们还对人类心脏进行了全基因组QTT分析,观察到在约22,000个转录本中,OGN转录本丰度与LVM的相关性最高。我们进一步在Ogn基因敲除小鼠中证实了Ogn在体内对LVM的调节作用。综上所述,这些数据表明Ogn是大鼠、小鼠和人类LVM的关键调节因子,并提示Ogn改变了对高血压和主动脉狭窄等外在因素的肥大反应。
Left ventricular mass (LVM) and cardiac gene expression are complex traits regulated by factors both intrinsic and extrinsic to the heart. To dissect the major determinants of LVM, we combined expression quantitative trait locus and quantitative trait transcript (QTT) analyses of the cardiac transcriptome in the rat. Using these methods and in vitro functional assays, we identified osteoglycin (Ogn) as a major candidate regulator of rat LVM, with increased Ogn protein expression associated with elevated LVM. We also applied genome-wide QTT analysis to the human heart and observed that, out of ~22,000 transcripts, OGN transcript abundance had the highest correlation with LVM. We further confirmed a role for Ogn in the in vivo regulation of LVM in Ogn knockout mice. Taken together, these data implicate Ogn as a key regulator of LVM in rats, mice and humans, and suggest that Ogn modifies the hypertrophic response to extrinsic factors such as hypertension and aortic stenosis.
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