Long Non-coding RNA BGas Regulates the Cystic Fibrosis Transmembrane Conductance Regulator.

Long Non-coding RNA BGas Regulates the Cystic Fibrosis Transmembrane Conductance Regulator.
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DOI:
10.1038/mt.2016.112
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发表时间:
2016-08
期刊:
Molecular therapy : the journal of the American Society of Gene Therapy
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其他
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囊性纤维化(CF)是一种缩短寿命的遗传性疾病。CF的根本原因是遗传性隐性突变,其影响囊性纤维化跨膜传导调节因子(CFTR)基因以及随后在细胞表面编码的离子通道的表达和活性。我们表明,CFTR转录调控的行动,一种新的长非编码RNA(lncRNA),指定为BGas,从CFTR基因的内含子11发出,并在相对于蛋白质编码的正义链的反义方向表达。我们发现BGas与包括HMGA1、HMGB1和WIBG在内的几种蛋白质协同作用,以调节CFTR基因内含子11的局部染色质和DNA结构,从而影响转录。BGas或其相关蛋白的抑制导致CFTR表达和氯离子功能的获得。这里描述的观察结果强调了以前未被充分认识的转录控制机制,并表明BGas可以作为特异性激活CFTR表达的治疗靶点。
Cystic fibrosis (CF) is a life-shortening genetic disease. The root cause of CF is heritable recessive mutations that affect the cystic fibrosis transmembrance conductance regulator (CFTR) gene and the subsequent expression and activity of encoded ion channels at the cell surface. We show that CFTR is regulated transcriptionally by the actions of a novel long noncoding RNA (lncRNA), designated as BGas, that emanates from intron 11 of the CFTR gene and is expressed in the antisense orientation relative to the protein coding sense strand. We find that BGas functions in concert with several proteins including HMGA1, HMGB1, and WIBG to modulate the local chromatin and DNA architecture of intron 11 of the CFTR gene and thereby affects transcription. Suppression of BGas or its associated proteins results in a gain of both CFTR expression and chloride ion function. The observations described here highlight a previously underappreciated mechanism of transcriptional control and suggest that BGas may serve as a therapeutic target for specifically activating expression of CFTR.
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