The HNF4α-BC200-FMR1–Positive Feedback Loop Promotes Growth and Metastasis in Invasive Mucinous Lung Adenocarcinoma
| Autor: | Jinying Shen, Yujie Zhao, Linhai Zhong, Tianhui Hu, Xiong Chen, Xiaolin Xu, Daxuan Wang, Yan-yan Zhan, Xiaoting Hong, Hanwei Cao, Yitong Zhou, Jianben Wu, Ying Lin, Wenqing Zhang, Jihuan Hou |
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| Rok vydání: | 2021 |
| Předmět: |
Cancer Research
Lung Neoplasms Mice Nude Adenocarcinoma of Lung Apoptosis medicine.disease_cause Mycophenolate Mycophenolic acid Metastasis Fragile X Mental Retardation Protein Mice In vivo Biomarkers Tumor Tumor Cells Cultured medicine Animals Humans Neoplasm Invasiveness Cell Proliferation Feedback Physiological Mice Inbred BALB C Messenger RNA business.industry Prognosis medicine.disease Adenocarcinoma Mucinous Xenograft Model Antitumor Assays Gene Expression Regulation Neoplastic Survival Rate Hepatocyte Nuclear Factor 4 Oncology Nuclear receptor Cancer research Adenocarcinoma Female RNA Long Noncoding KRAS business medicine.drug |
| Zdroj: | Cancer Research. 81:5904-5918 |
| ISSN: | 1538-7445 0008-5472 |
| Popis: | Invasive mucinous lung adenocarcinoma (IMA) is a subtype of lung adenocarcinoma with a strong invasive ability. IMA frequently carries "undruggable" KRAS mutations, highlighting the need for new molecular targets and therapies. Nuclear receptor HNF4α is abnormally enriched in IMA, but the potential of HNF4α to be a therapeutic target for IMA remains unknown. Here, we report that P2 promoter-driven HNF4α expression promotes IMA growth and metastasis. Mechanistically, HNF4α transactivated lncRNA BC200, which acted as a scaffold for mRNA binding protein FMR1. BC200 promoted the ability of FMR1 to bind and regulate stability of cancer-related mRNAs and HNF4α mRNA, forming a positive feedback circuit. Mycophenolic acid, the active metabolite of FDA-approved drug mycophenolate mofetil, was identified as an HNF4α antagonist exhibiting anti-IMA activities in vitro and in vivo. This study reveals the role of a HNF4α-BC200-FMR1–positive feedback loop in promoting mRNA stability during IMA progression and metastasis, providing a targeted therapeutic strategy for IMA. Significance: Growth and metastatic progression of invasive mucinous lung adenocarcinoma can be restricted by targeting HNF4α, a critical regulator of a BC200-FMR1-mRNA stability axis. |
| Databáze: | OpenAIRE |
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