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Physiological roles of miR-155

机译:miR-155的生理作用

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摘要

miR-155 is involved in non-coding microRNAs found in humans, mice and chickens of which the sequence is conserved. Historically, miR-155 was identified as a B-cell integration cluster (bic), which induces B-cell leucosis in chickens, by its activation through viral promoter insertion. Subsequent studies have shown that transgenic mice expressing miR-155 in B cells generated lymphoma, showing that miR-155 is oncogenic. Biochemical investigation identifies many substrates of miR-155, and one of them in B cells and macrophages is the SH2-domain containing inositol-5-phosphatase 1. A deficiency of miR-155 in the immune system causes attenuated immune functions. Clinically, several types of malignancy including diffuse large B-cell lymphoma have high miR-155 expression levels.
机译:miR-155参与在人类,小鼠和鸡中发现的非编码microRNA,其序列被保守。从历史上看,miR-155被鉴定为B细胞整合簇(bic),通过其通过病毒启动子的插入而被激活,从而诱导鸡B细胞白血病。随后的研究表明,在B细胞中表达miR-155的转基因小鼠产生了淋巴瘤,表明miR-155是致癌的。生化研究确定了miR-155的许多底物,其中B细胞和巨噬细胞中的一种底物是含有肌醇5-磷酸酶1的SH2结构域。免疫系统中miR-155的缺乏会导致免疫功能减弱。临床上,包括弥漫性大B细胞淋巴瘤在内的几种恶性肿瘤均具有高miR-155表达水平。

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