An NF90/NF110-mediated feedback amplification loop regulates dicer expression and controls ovarian carcinoma progression.

An NF90/NF110-mediated feedback amplification loop regulates dicer expression and controls ovarian carcinoma progression.
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NF90/NF110介导的反馈放大环路调节dicer表达并控制卵巢癌

DOI:
10.1038/s41422-018-0016-8
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发表时间:
2018-05
期刊:
影响因子:
44.1
通讯作者:
Kiernan R
Kiernan R
中科院分区:
生物学1区
文献类型:
--
作者:
Barbier J;Chen X;Sanchez G;Cai M;Helsmoortel M;Higuchi T;Giraud P;Contreras X;Yuan G;Feng Z;Nait-Saidi R;Deas O;Bluy L;Judde JG;Rouquier S;Ritchie W;Sakamoto S;Xie D;Kiernan R

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DICER是miRNA通路中的一种关键酶,其表达降低通常与各种恶性肿瘤的侵袭性、侵袭性疾病和较差的生存率相关。然而,DICER表达的调控尚不清楚。在这里,我们发现NF90/NF110通过控制嵌入DICER前mrna中的miRNA miR-3173的加工来促进DICER表达。由于miR-3173反过来靶向NF90,因此建立了控制DICER表达的反馈放大回路。在裸鼠模型中,NF90过表达可降低卵巢癌细胞的增殖,显著降低肿瘤大小和转移,而miR-3173过表达则以NF90和dicer依赖的方式显著增加转移。临床发现,在一组卵巢癌患者中,NF90低表达和miR-3173-3p高表达是生存不良的独立预后指标。这些发现表明,NF90通过促进DICER的表达,可以作为卵巢癌的抑制因子。
Reduced expression of DICER, a key enzyme in the miRNA pathway, is frequently associated with aggressive, invasive disease and poor survival in various malignancies. Regulation of DICER expression is, however, poorly understood. Here, we show that NF90/NF110 facilitates DICER expression by controlling the processing of a miRNA, miR-3173, that is embedded in DICER pre-mRNA. Since miR-3173 in turn targets NF90, a feedback amplification loop controlling DICER expression is established. In a nude mouse model, NF90 overexpression reduced proliferation of ovarian cancer cells and significantly reduced tumor size and metastasis while overexpression of miR-3173 dramatically increased metastasis in a NF90- and DICER-dependent manner. Clinically, low NF90 expression and high miR-3173-3p expression were found to be independent prognostic markers of poor survival in a cohort of ovarian carcinoma patients. These findings suggest that, by facilitating DICER expression, NF90 can act as a suppressor of ovarian carcinoma.
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