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Micromanaging a large tumor suppressor

机译:微处理大型肿瘤抑制物

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Studies of microRNA (miRNA) in cancer are relatively recent but have exciting possibilities to improve our understanding and treatment of this disease.1 Over 1,000 miRNAs (1-4% of the human genome) exist in non-coding genes or gene clusters or in introns of coding genes. Primary miRNA transcripts are cleaved into stem-loop structures in the nucleus and trimmed into 19-24 nucleotide duplexes in the cytoplasm. One strand of a duplex is incorporated into an RNA-induced silencing complex (RISC), where it binds complementary sequences in 3'-untranslated regions (UTRs) and decreases protein expression by inhibiting translation or causing mRNA degradation. Each miRNA can potentially bind 200 mRNAs and regulate multiple genetic pathways.
机译:癌症中的microRNA(miRNA)研究相对较新,但有令人振奋的可能性,可以增进我们对这种疾病的理解和治疗。1非编码基因或基因簇或非编码基因中存在1,000多种miRNA(占人类基因组的1-4%)。编码基因的内含子。初级miRNA转录物在细胞核中被切割成茎环结构,并在细胞质中被修饰成19-24个核苷酸双链体。将双链体的一条链掺入RNA诱导的沉默复合体(RISC),在其中它结合3'非翻译区(UTR)中的互补序列,并通过抑制翻译或引起mRNA降解来降低蛋白质表达。每个miRNA可能会结合200个mRNA,并调节多种遗传途径。

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