The long non-coding RNA HOTTIP enhances pancreatic cancer cell proliferation, survival and migration.

The long non-coding RNA HOTTIP enhances pancreatic cancer cell proliferation, survival and migration.
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DOI:
10.18632/oncotarget.3450
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发表时间:
2015-05-10
期刊:
影响因子:
--
通讯作者:
Safe S
Safe S
中科院分区:
其他
文献类型:
--
作者:
Cheng Y;Jutooru I;Chadalapaka G;Corton JC;Safe S

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HOTTIP是从HOXA基因座的5′端转录的长的非编码RNA(lncRNA),并且与多梳阻遏物复合物2(PRC 2)和WD重复包含蛋白5(WDR 5)/混合谱系白血病1(MLL 1)染色质修饰复合物相关。HOTTIP在胰腺癌细胞系中表达,并且在Pancl胰腺癌细胞中通过RNA干扰敲低HOTTIP(siHOTTIP)降低增殖,诱导凋亡和降低迁移。在用siHOTTIP转染的Panc 1细胞中,有757个基因的表达降低,514个基因的表达增加,有限的基因分析表明HOTTIP对基因的调控是复杂的。例如,极光激酶A,一种重要的细胞生长调节因子,由MLL而不是WDR 5共同调节,与先前在肝癌细胞中的研究相反,HOTTIP不调节HOXA 13,但在调节几种其他HOX基因中起作用,包括HOXA 10,HOXB 2,HOXA 11,HOXA 9和HOXA 1。虽然HOTTIP和HOX相关lncRNA HOTAIR具有相似的促癌功能,但它们在Panc 1细胞和胰腺肿瘤中调节的基因组截然不同。
HOTTIP is a long non-coding RNA (lncRNA) transcribed from the 5′ tip of the HOXA locus and is associated with the polycomb repressor complex 2 (PRC2) and WD repeat containing protein 5 (WDR5)/mixed lineage leukemia 1 (MLL1) chromatin modifying complexes. HOTTIP is expressed in pancreatic cancer cell lines and knockdown of HOTTIP by RNA interference (siHOTTIP) in Panc1 pancreatic cancer cells decreased proliferation, induced apoptosis and decreased migration. In Panc1 cells transfected with siHOTTIP, there was a decrease in expression of 757 genes and increased expression of 514 genes, and a limited gene analysis indicated that HOTTIP regulation of genes is complex. For example, Aurora kinase A, an important regulator of cell growth, is coregulated by MLL and not WDR5 and, in contrast to previous studies in liver cancer cells, HOTTIP does not regulate HOXA13 but plays a role in regulation of several other HOX genes including HOXA10, HOXB2, HOXA11, HOXA9 and HOXA1. Although HOTTIP and the HOX-associated lncRNA HOTAIR have similar pro-oncogenic functions, they regulate strikingly different sets of genes in Panc1 cells and in pancreatic tumors.
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