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Li K, Lv J, Wang J, Wei Y, Zhang Y, Lin J, Zhu Q. CircZNF609 inhibited bladder cancer immunotherapy sensitivity via enhancing fatty acid uptake through IGF2BP2/CD36 pathway. Int Immunopharmacol 2024; 137:112485. [PMID: 38878487 DOI: 10.1016/j.intimp.2024.112485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/10/2024] [Accepted: 06/11/2024] [Indexed: 07/11/2024]
Abstract
Circular RNAs (circRNAs) are gaining attention for their involvement in immune escape and immunotherapy sensitivity regulation. CircZNF609 is a well-known oncogene in various solid tumours. Our previous research revealed its role in reducing the chemosensitivity of bladder cancer (BCa) to cisplatin. However, the underlying role of circZNF609 in BCa immune escape and immunotherapy sensitivity remains unknown. We conducted BCa cells-CD8 + T cells co-culture assays, cell line-derived xenograft and patient-derived xenograft mouse models with human immune reconstitution to further confirm the role of circZNF609 in BCa immune escape and immunotherapy sensitivity. Overexpression of circZNF609 promoted BCa immune escape in vitro and in vivo. Mechanistically, circZNF609 was bound to IGF2BP2, enhancing its interaction with the 3'-untranslated region of CD36. This increased the stability of the CD36 mRNA, leading to enhanced fatty acid uptake by BCa cells and fatty acid depletion within the tumour microenvironment. Additionally, the nuclear export of circZNF609 was regulated by DDX39B. CircZNF609 promoted immune escape and suppressed BCa immunotherapy sensitivity by regulating the newly identified circZNF609/IGF2BP2/CD36 cascade. Therefore, circZNF609 holds potential as both a biomarker and therapeutic target in BCa immunotherapy.
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Affiliation(s)
- Kai Li
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jiancheng Lv
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jun Wang
- Department of Urology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Yong Wei
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yetao Zhang
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jianzhong Lin
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Qingyi Zhu
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China; Department of Urology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.
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Hwang HJ, Kim YK. Molecular mechanisms of circular RNA translation. Exp Mol Med 2024:10.1038/s12276-024-01220-3. [PMID: 38871818 DOI: 10.1038/s12276-024-01220-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 02/22/2024] [Accepted: 02/23/2024] [Indexed: 06/15/2024] Open
Abstract
Circular RNAs (circRNAs) are covalently closed single-stranded RNAs without a 5' cap structure and a 3' poly(A) tail typically present in linear mRNAs of eukaryotic cells. CircRNAs are predominantly generated through a back-splicing process within the nucleus. CircRNAs have long been considered non-coding RNAs seemingly devoid of protein-coding potential. However, many recent studies have challenged this idea and have provided substantial evidence that a subset of circRNAs can associate with polysomes and indeed be translated. Therefore, in this review, we primarily highlight the 5' cap-independent internal initiation of translation that occurs on circular RNAs. Several molecular features of circRNAs, including the internal ribosome entry site, N6-methyladenosine modification, and the exon junction complex deposited around the back-splicing junction after back-splicing event, play pivotal roles in their efficient internal translation. We also propose a possible relationship between the translatability of circRNAs and their stability, with a focus on nonsense-mediated mRNA decay and nonstop decay, both of which are well-characterized mRNA surveillance mechanisms. An in-depth understanding of circRNA translation will reshape and expand our current knowledge of proteomics.
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Affiliation(s)
- Hyun Jung Hwang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Yoon Ki Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
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3
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Ghadami E, Gorji A, Pour-Rashidi A, Noorbakhsh F, Kabuli M, Razipour M, Choobineh H, Maghsudlu M, Damavandi E, Ghadami M. CircZNF609 and circNFIX as possible regulators of glioblastoma pathogenesis via miR-145-5p/EGFR axis. Sci Rep 2024; 14:13551. [PMID: 38866807 PMCID: PMC11169398 DOI: 10.1038/s41598-024-63827-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 06/03/2024] [Indexed: 06/14/2024] Open
Abstract
Glioblastoma is a rare and deadly malignancy with a low survival rate. Emerging evidence has shown that aberrantly expressed circular RNAs (circRNAs) play a critical role in the initiation and progression of GBM tumorigenesis. The oncogenic function of circZNF609 and circNFIX is involved in several types of cancer, but the role and underlying mechanism of these circRNAs in glioblastoma remain unclear. In this study, we hypothesized that circZNF609 and circNFIX may regulate EGFR through sponging miR-145-5p. Herein, we assessed the expression levels of circZNF609, circNFIX, miR-145-5p, and EGFR using quantitative polymerase chain reaction in glioblastoma patients and normal brain samples. The results showed that circZNF609, circNFIX, and EGFR expression levels were upregulated and miR145-5p was downregulated (p = 0.001, 0.06, 0.002, and 0.0065, respectively), while there was no significant association between clinicopathological features of the patients and the level of these genes expression. We also found a significant inverse correlation between miR145-5p and the expression of cZNF609, cNFIX and EGFR (p = 0.0003, 0.0006, and 0.009, respectively). These findings may open a new window for researchers to better understand the potential pathways involved in GBM pathogenesis. In conclusion, it may provide a new potential pathway for the development of effective drugs for the treatment of GBM patients.
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Affiliation(s)
- Elham Ghadami
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Gorji
- Shefa Neuroscience Research Center, Khatam Al-Anbia Hospital, Tehran, Iran
- Department of Neurosurgery, Westfälische Wilhelms-Universität, Munster, Germany
| | - Ahmad Pour-Rashidi
- Department of Neurosurgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Farshid Noorbakhsh
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Majid Kabuli
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Razipour
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Choobineh
- School of Allied Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohaddese Maghsudlu
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Elia Damavandi
- Department of Photodynamic, Medical Laser Research Center, Yara Institute, ACECR, Tehran, Iran
- Specialized Medical Genetic Center (SMGC) of ACECR, Tehran, Iran
| | - Mohsen Ghadami
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
- Cardiac Primary Research Center, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
- Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Huang W, Paul D, Calin GA, Bayraktar R. miR-142: A Master Regulator in Hematological Malignancies and Therapeutic Opportunities. Cells 2023; 13:84. [PMID: 38201290 PMCID: PMC10778542 DOI: 10.3390/cells13010084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/29/2023] [Accepted: 12/15/2023] [Indexed: 01/12/2024] Open
Abstract
MicroRNAs (miRNAs) are a type of non-coding RNA whose dysregulation is frequently associated with the onset and progression of human cancers. miR-142, an ultra-conserved miRNA with both active -3p and -5p mature strands and wide-ranging physiological targets, has been the subject of countless studies over the years. Due to its preferential expression in hematopoietic cells, miR-142 has been found to be associated with numerous types of lymphomas and leukemias. This review elucidates the multifaceted role of miR-142 in human physiology, its influence on hematopoiesis and hematopoietic cells, and its intriguing involvement in exosome-mediated miR-142 transport. Moreover, we offer a comprehensive exploration of the genetic and molecular landscape of the miR-142 genomic locus, highlighting its mutations and dysregulation within hematological malignancies. Finally, we discuss potential avenues for harnessing the therapeutic potential of miR-142 in the context of hematological malignancies.
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Affiliation(s)
- Wilson Huang
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (W.H.); (G.A.C.)
| | - Doru Paul
- Division of Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY 10065, USA;
| | - George A. Calin
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (W.H.); (G.A.C.)
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Department of Leukemia, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Recep Bayraktar
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Sun W, Zhou S, Peng L, Liu Y, Cheng D, Wang Y, Ni C. CircZNF609 regulates pulmonary fibrosis via miR-145-5p/KLF4 axis and its translation function. Cell Mol Biol Lett 2023; 28:105. [PMID: 38105235 PMCID: PMC10726587 DOI: 10.1186/s11658-023-00518-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/30/2023] [Indexed: 12/19/2023] Open
Abstract
BACKGROUND Pulmonary fibrosis is a growing clinical problem that develops as a result of abnormal wound healing, leading to breathlessness, pulmonary dysfunction and ultimately death. However, therapeutic options for pulmonary fibrosis are limited because the underlying pathogenesis remains incompletely understood. Circular RNAs, as key regulators in various diseases, remain poorly understood in pulmonary fibrosis induced by silica. METHODS We performed studies with fibroblast cell lines and silica-induced mouse pulmonary fibrosis models. The expression of circZNF609, miR-145-5p, and KLF4 was determined by quantitative real-time polymerase chain reaction (qRT-PCR) analysis. RNA immunoprecipitation (RIP) assays and m6A RNA immunoprecipitation assays (MeRIP), Western blotting, immunofluorescence assays, and CCK8 were performed to investigate the role of the circZNF609/miR-145-5p/KLF4 axis and circZNF609-encoded peptides in fibroblast activation. RESULTS Our data showed that circZNF609 was downregulated in activated fibroblasts and silica-induced fibrotic mouse lung tissues. Overexpression of circZNF609 could inhibit fibroblast activation induced by transforming growth factor-β1 (TGF-β1). Mechanically, we revealed that circZNF609 regulates pulmonary fibrosis via miR-145-5p/KLF4 axis and circZNF609-encoded peptides. Furthermore, circZNF609 was highly methylated and its expression was controlled by N6-methyladenosine (m6A) modification. Lastly, in vivo studies revealed that overexpression of circZNF609 attenuates silica-induced lung fibrosis in mice. CONCLUSIONS Our data indicate that circZNF609 is a critical regulator of fibroblast activation and silica-induced lung fibrosis. The circZNF609 and its derived peptides may represent novel promising targets for the treatment of pulmonary fibrosis.
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Affiliation(s)
- Wenqing Sun
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Siyun Zhou
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Lan Peng
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Yi Liu
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Demin Cheng
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Yue Wang
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Chunhui Ni
- Department of Occupational Medical and Environmental Health, Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China.
- Department of Public Health, Kangda College of Nanjing Medical University, Lianyungang, 320700, China.
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Cui Y, Wu X, Jin J, Man W, Li J, Li X, Li Y, Yao H, Zhong R, Chen S, Wu J, Zhu T, Lin Y, Xu J, Wang Y. CircHERC1 promotes non-small cell lung cancer cell progression by sequestering FOXO1 in the cytoplasm and regulating the miR-142-3p-HMGB1 axis. Mol Cancer 2023; 22:179. [PMID: 37932766 PMCID: PMC10626661 DOI: 10.1186/s12943-023-01888-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/24/2023] [Indexed: 11/08/2023] Open
Abstract
BACKGROUND Noncoding RNAs such as circular RNAs (circRNAs) are abundant in the human body and influence the occurrence and development of various diseases. Non-small cell lung cancer (NSCLC) is one of the most common malignant cancers. Information on the functions and mechanism of circRNAs in lung cancer is limited; thus, the topic needs more exploration. The purpose of this study was to identify aberrantly expressed circRNAs in lung cancer, unravel their roles in NSCLC progression, and provide new targets for lung cancer diagnosis and therapy. METHODS High-throughput sequencing was used to analyze differential circRNA expression in patients with lung cancer. qRT‒PCR was used to determine the level of circHERC1 in lung cancer tissues and plasma samples. Gain- and loss-of-function experiments were implemented to observe the impacts of circHERC1 on the growth, invasion, and metastasis of lung cancer cells in vitro and in vivo. Mechanistically, dual luciferase reporter assays, fluorescence in situ hybridization (FISH), RNA immunoprecipitation (RIP) and RNA pull-down experiments were performed to confirm the underlying mechanisms of circHERC1. Nucleocytoplasmic localization of FOXO1 was determined by nucleocytoplasmic isolation and immunofluorescence. The interaction of circHERC1 with FOXO1 was verified by RNA pull-down, RNA immunoprecipitation (RIP) and western blot assays. The proliferation and migration of circHERC1 in vivo were verified by subcutaneous and tail vein injection in nude mice. RESULTS CircHERC1 was significantly upregulated in lung cancer tissues and cells, ectopic expression of circHERC1 strikingly facilitated the proliferation, invasion and metastasis, and inhibited the apoptosis of lung cancer cells in vitro and in vivo. However, knockdown of circHERC1 exerted the opposite effects. CircHERC1 was mainly distributed in the cytoplasm. Further mechanistic research indicated that circHERC1 acted as a competing endogenous RNA of miR-142-3p to relieve the repressive effect of miR-142-3p on its target HMGB1, activating the MAPK/ERK and NF-κB pathways and promoting cell migration and invasion. More importantly, we found that circHERC1 could bind FOXO1 and sequester it in the cytoplasm, adjusting the feedback AKT pathway. The accumulation of FOXO1 in the cytosol and nuclear exclusion promoted cell proliferation and inhibited apoptosis. CircHERC1 is a new circRNA that promotes tumor function in NSCLC and may serve as a potential prognostic biomarker and therapeutic target for NSCLC. CONCLUSIONS CircHERC1 is a new circRNA that promotes tumor function in NSCLC and may serve as a potential diagnosis biomarker and therapeutic target for NSCLC. Our findings indicate that circHERC1 facilitates the invasion and metastasis of NSCLC cells by regulating the miR-142-3p/HMGB1 axis and activating the MAPK/ERK and NF-κB pathways. In addition, circHERC1 can promote cell proliferation and inhibit apoptosis by sequestering FOXO1 in the cytoplasm to regulate AKT activity and BIM transcription.
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Affiliation(s)
- Yumeng Cui
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Xiaojie Wu
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Jie Jin
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Weiling Man
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Jie Li
- Department of Thoracic Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing, 100850, China
| | - Xiang Li
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Yanghua Li
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - He Yao
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Rongbin Zhong
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Shiyun Chen
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Jiahui Wu
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Tianhao Zhu
- Beijing Institute of Biotechnology, Beijing, 100071, China
| | - Yanli Lin
- Beijing Institute of Biotechnology, Beijing, 100071, China.
| | - Junjie Xu
- Beijing Institute of Biotechnology, Beijing, 100071, China.
| | - Youliang Wang
- Beijing Institute of Biotechnology, Beijing, 100071, China.
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Feng D, Lv J, Li K, Cao Q, Han J, Yu H, Cheng Y, Zhuang J, Cai L, Yang H, Yang X, Lu Q. CircZNF609 promotes bladder cancer progression and inhibits cisplatin sensitivity via miR-1200/CDC25B pathway. Cell Biol Toxicol 2023; 39:1-18. [PMID: 35567596 DOI: 10.1007/s10565-022-09715-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 04/07/2022] [Indexed: 12/21/2022]
Abstract
Circular RNAs (circRNAs) have been extensively studied in tumor development and treatment. CircZNF609 (hsa_circ_0000615) has been shown to serve as an oncogene in all kinds of solid tumors and may act as the novel biomarker in tumor diagnosis and therapy in tumor early diagnosis and therapy. However, the underlying character and mechanism of circZNF609 in cisplatin chemosensitivity and bladder cancer (BCa) development were unknown. The expression level of cell division cycle 25B (CDC25B), microRNA 1200 (miR-1200), and circZNF609 in BCa cells and tissues depended on quantitative real-time PCR (qRT-PCR). CDC25B protein level was assayed with Western blot. Functional assays in vitro and in vivo had been conducted to inspect the important role of circZNF609 on BCa progression and cisplatin chemosensitivity in BCa. RNA sequencing and online databases were used to predict the interactions among circZNF609, miR-1200, and CDC25B. Mechanistic exploration was confirmed by RNA pull-down assay, RNA fluorescence in situ hybridization (FISH) and Dual luciferase reporter assay. CircZNF609 expression was increased significantly in BCa cell lines and tissues. For BCa patients, increased expression of circZNF609 was correlated with a worse survival. In vitro and in vivo, enforced expression of circZNF609 enhanced BCa cells proliferation, migration, and cisplatin chemoresistance. Mechanistically, circZNF609 alleviated the inhibition effect on target CDC25B expression by sponging miR-1200. CircZNF609 promoted tumor growth through novel circZNF609/miR-1200/CDC25B axis, implying that circZNF609 has significant potential to act as a new diagnostic biomarker and therapeutic target in BCa. Enhancing cisplatin sensitivity is an important direction for bladder cancer management. 1. This research reveals that circZNF609 improves bladder cancer progression and inhibits cisplatin sensitivity by inducing G1/S cell cycle arrest via a novel miR-1200/CDC25B cascades. 2. CircZNF609 was confirmed associated with worse survival of bladder cancer patients. 3. CircZNF609 act as a prognostic biomarker for bladder cancer treatment.
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Affiliation(s)
- Dexiang Feng
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Jiancheng Lv
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Kai Li
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Qiang Cao
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Jie Han
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Hao Yu
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yidong Cheng
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Juntao Zhuang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Lingkai Cai
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Haiwei Yang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Xiao Yang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Qiang Lu
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
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Malviya A, Bhuyan R. The recent advancements in circRNA research: From biogenesis to therapeutic interventions. Pathol Res Pract 2023; 248:154697. [PMID: 37506629 DOI: 10.1016/j.prp.2023.154697] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023]
Abstract
Circular RNAs (circRNAs) belong to the genre of long non-coding RNAs that are formed by special back-splicing events and are currently the molecule of interest for studies globally due their involvement in various ailments like diabetes, neurodegenerative disorders, cardio-vascular diseases and cancers. These class of highly stable RNAs participate in diverse cellular functionalities including microRNA (miRNA) sponging, ceRNA (competing endogenous RNA) activity or via exhibiting RNA binding protein (RBP) interactions. They are also known to regulate cancer progression both positively and negatively through various biological pathways such as, modulating the cell cycle and apoptotic pathways, epigenetic regulation, and translational and/or transcriptional regulations etc. Given its significance, a variety of computational tools and dedicated databases have been created for the identification, quantification, and differential expression of such RNAs in combination with sequencing approaches. In this review, we provide a comprehensive analysis of the numerous computational tools, pipelines, and online resources developed in recent years for the detection and annotation of circRNAs. We also summarise the most recent findings regarding the characteristics, functions, biological processes, and involvement of circRNAs in diseases. The review emphasises the significance of circRNAs as potential disease biomarkers and new treatment targets.
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Affiliation(s)
- Ayushi Malviya
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Banasthali, Tonk, Rajasthan 304022, India
| | - Rajabrata Bhuyan
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Banasthali, Tonk, Rajasthan 304022, India.
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Ouyang X, He Z, Fang H, Zhang H, Yin Q, Hu L, Gao F, Yin H, Hao T, Hou Y, Wu Q, Deng J, Xu J, Wang Y, Chen C. A protein encoded by circular ZNF609 RNA induces acute kidney injury by activating the AKT/mTOR-autophagy pathway. Mol Ther 2023; 31:1722-1738. [PMID: 36110046 PMCID: PMC10277836 DOI: 10.1016/j.ymthe.2022.09.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/28/2022] [Accepted: 09/12/2022] [Indexed: 01/18/2023] Open
Abstract
Autophagy plays a crucial role in the development and progression of ischemic acute kidney injury (AKI). However, the function and mechanism of circular RNAs (circRNAs) in the regulation of autophagy in ischemic AKI remain unexplored. Herein, we find that circ-ZNF609, originating from the ZNF609 locus, is highly expressed in the kidney after ischemia/reperfusion injury, and urinary circ-ZNF609 is a moderate predictor for AKI in heart disease patients. Overexpression of circ-ZNF609 can activate AKT3/mTOR signaling and induce autophagy flux impairment and cell apoptosis while inhibiting proliferation in HK-2 cells, which is blocked by silencing circ-ZNF609. Mechanistically, circ-ZNF609 encodes a functional protein consisting of 250 amino acids (aa), termed ZNF609-250aa, the overexpression of which can activate AKT3/mTOR signaling and induce autophagy flux impairment and cell apoptosis in HK-2 cells in vitro and in AKI kidneys in vivo. The blockade of AKT and mTOR signaling with pharmacological inhibitors is capable of reversing ZNF609-250aa-induced autophagy flux impairment and cell apoptosis in HK-2 cells. The present study demonstrates that highly expressed circ-ZNF609-encoded ZNF609-250aa induces cell apoptosis and AKI by impairing the autophagy flux via an AKT/mTOR-dependent mechanism. These findings imply that targeting circ-ZNF609 may be a novel therapy for ischemic AKI.
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Affiliation(s)
- Xin Ouyang
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China
| | - Zhimei He
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China
| | - Heng Fang
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China; Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China
| | - Huidan Zhang
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China; Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China
| | - Qi Yin
- CookGene Biosciences Center, Guangzhou 510320, Guangdong, China; Forevergen Biosciences Center, Guangzhou 510320, Guangdong, China
| | - Linhui Hu
- Department of Critical Care Medicine, Maoming People's Hospital, Maoming 525000, Guangdong, China; Department of Scientific Research Center, Maoming People's Hospital, Maoming 525000, Guangdong, China
| | - Fei Gao
- CookGene Biosciences Center, Guangzhou 510320, Guangdong, China; Forevergen Biosciences Center, Guangzhou 510320, Guangdong, China
| | - Hao Yin
- CookGene Biosciences Center, Guangzhou 510320, Guangdong, China; Forevergen Biosciences Center, Guangzhou 510320, Guangdong, China
| | - Taofang Hao
- CookGene Biosciences Center, Guangzhou 510320, Guangdong, China; Forevergen Biosciences Center, Guangzhou 510320, Guangdong, China
| | - Yating Hou
- Department of Critical Care Medicine, Maoming People's Hospital, Maoming 525000, Guangdong, China
| | - Qingrui Wu
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China; Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China
| | - Jia Deng
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China
| | - Jing Xu
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China
| | - Yirong Wang
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China; Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China
| | - Chunbo Chen
- Department of Intensive Care Unit of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 96 Dongchuan Road, Guangzhou 510080, Guangdong, China; Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou 510080, Guangdong, China; Department of Critical Care Medicine, Maoming People's Hospital, Maoming 525000, Guangdong, China; The Second School of Clinical Medicine, Southern Medical University, Guangzhou 510515, Guangdong, China.
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10
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Liu H, Yu Z, Liu Y, Li M, Chen C, Zhu Z, Liu F, Tan L. Investigation of Diagnostic and Prognostic Value of CLEC4M of Non-Small Cell Lung Carcinoma Associated with Immune Microenvironment. Int J Gen Med 2023; 16:1317-1332. [PMID: 37089135 PMCID: PMC10115202 DOI: 10.2147/ijgm.s397695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/30/2023] [Indexed: 04/25/2023] Open
Abstract
Purpose C-type lectin domain family 4 member M (CLEC4M) has been found to be involved in the occurrence and development of cancer, but its role in NSCLC remains to be fully explored. Our work aims to evaluate the diagnostic and prognostic value of CLEC4M in NSCLC and to investigate the underlying mechanisms of CLEC4M in the immune microenvironment of NSCLC. Methods Integrating publicly accessible data and clinical tissue samples to verify the expression of CLEC4M in NSCLC. The diagnostic value of CLEC4M was determined by receiver operating characteristic (ROC) curve. Kaplan-Meier survival analysis, nomogram plot, univariate and multivariate Cox regression models were performed to evaluate the prognostic impact of CLEC4M on NSCLC patients. The correlation between CLEC4M and tumor immune infiltration was estimated using TIMER and UALCAN databases. Functional assessments including GO, KEGG pathway and GSEA analyses were implemented to illustrate the potential mechanisms of CLEC4M in NSCLC. Results CLEC4M was significantly downregulated in NSCLC tissue, as confirmed by immunohistochemistry of clinical tissues. The high AUC value of ROC curves demonstrated the diagnostic accuracy of CLEC4M in NSCLC. Additionally, low CLEC4M expression was associated with poor survival in NSCLC patients. Furthermore, CLEC4M was found to be significantly associated with tumor immune infiltration, and CLEC4M may be involved in immune activation and proliferation inhibition through the functional assessment, suggesting that CLEC4M may be a therapeutic target for NSCLC patients. Conclusion Our findings reveal CLEC4M is significantly downregulated in NSCLC tissues, and illustrate the diagnostic and prognostic value of CLEC4M in NSCLC, as well as its potential serve as an immune-related therapeutic target.
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Affiliation(s)
- Huan Liu
- Department of Precision Medicine Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
- Key Laboratory of Cancer Prevention and Treatment of Huaihua, Huaihua, People’s Republic of China
| | - Zhiping Yu
- School of Pharmacy, Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Yueguang Liu
- Department of Clinicopathology Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
| | - Mingzhen Li
- Department of Precision Medicine Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
- Key Laboratory of Cancer Prevention and Treatment of Huaihua, Huaihua, People’s Republic of China
| | - Cheng Chen
- Department of Precision Medicine Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
- Key Laboratory of Cancer Prevention and Treatment of Huaihua, Huaihua, People’s Republic of China
| | - Zhiyu Zhu
- Department of Clinicopathology Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
| | - Fang Liu
- Department of Clinicopathology Center, The Second People’s Hospital of Huaihua, Huaihua, People’s Republic of China
| | - Liming Tan
- Key Laboratory of Cancer Prevention and Treatment of Huaihua, Huaihua, People’s Republic of China
- School of Pharmacy, Xuzhou Medical University, Xuzhou, People’s Republic of China
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11
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Liu Y, Liu Y, He Y, Zhang N, Zhang S, Li Y, Wang X, Liang Y, Chen X, Zhao W, Chen B, Wang L, Luo D, Yang Q. Hypoxia-Induced FUS-circTBC1D14 Stress Granules Promote Autophagy in TNBC. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204988. [PMID: 36806670 PMCID: PMC10074116 DOI: 10.1002/advs.202204988] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 12/20/2022] [Indexed: 05/27/2023]
Abstract
Triple-negative breast cancer (TNBC) is a highly aggressive subtype of breast cancer that is suggested to be associated with hypoxia. This study is the first to identify a novel circular RNA (circRNA), circTBC1D14, whose expression is significantly upregulated in TNBC. The authors confirm that high circTBC1D14 expression is associated with a poor prognosis in patients with breast cancer. circTBC1D14-associated mass spectrometry and RNA-binding protein-related bioinformatics strategies indicate that FUS can interact with circTBC1D14, which can bind to the downstream flanking sequence of circTBC1D14 to induce cyclization. FUS is an essential biomarker associated with stress granules (SGs), and the authors find that hypoxic conditions can induce FUS-circTBC1D14-associated SG formation in the cytoplasm after modification by protein PRMT1. Subsequently, circTBC1D14 increases the stability of PRMT1 by inhibiting its K48-regulated polyubiquitination, leading to the upregulation of PRMT1 expression. In addition, FUS-circTBC1D14 SGs can initiate a cascade of SG-linked proteins to recognize and control the elimination of SGs by recruiting LAMP1 and enhancing lysosome-associated autophagy flux, thus contributing to the maintenance of cellular homeostasis and promoting tumor progression in TNBC. Overall, these findings reveal that circTBC1D14 is a potential prognostic indicator that can serve as a therapeutic target for TNBC treatment.
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Affiliation(s)
- Ying Liu
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Yiwei Liu
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Yinqiao He
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Ning Zhang
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Siyue Zhang
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Yaming Li
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Xiaolong Wang
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Yiran Liang
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Xi Chen
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Weijing Zhao
- Pathology Tissue BankQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Bing Chen
- Pathology Tissue BankQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Lijuan Wang
- Pathology Tissue BankQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Dan Luo
- Pathology Tissue BankQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
| | - Qifeng Yang
- Department of Breast SurgeryGeneral SurgeryQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
- Pathology Tissue BankQilu Hospital of Shandong UniversityJi'nanShandong250012P. R. China
- Research Institute of Breast CancerShandong UniversityJi'nanShandong250012P. R. China
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12
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Lee KY, Liu CM, Chen LH, Lee CY, Lu TP, Chuang LL, Lai LC. Hypoxia-responsive circular RNA circAAGAB reduces breast cancer malignancy by activating p38 MAPK and sponging miR-378 h. Cancer Cell Int 2023; 23:45. [PMID: 36899354 PMCID: PMC10007766 DOI: 10.1186/s12935-023-02891-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 03/04/2023] [Indexed: 03/12/2023] Open
Abstract
BACKGROUND Breast cancer is a prevalent disease in women, with high prevalence worldwide. The hypoxic microenvironment of solid tumors develops during the progress of carcinogenesis and leads to greater malignancy and treatment resistance. Recently, accumulating evidence indicates that non-coding RNAs, such as circular RNAs (circRNAs), play a pivotal role in altering cellular functions. However, the underlying mechanisms of circRNAs in breast cancer are still unclear. Therefore, the purpose of this study was to investigate the role of a tumor-suppressive circRNA, circAAGAB, in breast cancer by assuming down-regulation of circAAGAB under hypoxia and the properties of a tumor suppressor. METHODS Firstly, circAAGAB was identified from expression profiling by next generation sequencing. Next, the stability of circAAGAB increased by interacting with the RNA binding protein FUS. Moreover, cellular and nuclear fractionation showed that most circAAGAB resided in the cytoplasm and that it up-regulated KIAA1522, NKX3-1, and JADE3 by sponging miR-378 h. Lastly, the functions of circAAGAB were explored by identifying its down-stream genes using Affymetrix microarrays and validated by in vitro assays. RESULTS The results showed that circAAGAB reduced cell colony formation, cell migration, and signaling through p38 MAPK pathway, as well as increased radiosensitivity. CONCLUSION These findings suggest that the oxygen-responsive circAAGAB acts as a tumor suppressor in breast cancer, and may contribute to the development of a more specific therapeutic regimen for breast cancer.
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Affiliation(s)
- Kuan-Yi Lee
- Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chia-Ming Liu
- Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Li-Han Chen
- Institute of Fisheries Science, College of Life Science, National Taiwan University, Taipei, Taiwan.,Department of Life Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chien-Yueh Lee
- Master Program for Biomedical Engineering, College of Biomedical Engineering, China Medical University, Taichung, Taiwan
| | - Tzu-Pin Lu
- Institute of Epidemiology and Preventive Medicine, Department of Public Health, National Taiwan University, Taipei, Taiwan
| | - Li-Ling Chuang
- School of Physical Therapy and Graduate Institute of Rehabilitation Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan. .,Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan.
| | - Liang-Chuan Lai
- Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei, Taiwan. .,Bioinformatics and Biostatistics Core, Center of Genomic and Precision Medicine, National Taiwan University, Taipei, Taiwan.
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13
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miR-142-3p improves paclitaxel sensitivity in resistant breast cancer by inhibiting autophagy through the GNB2-AKT-mTOR Pathway. Cell Signal 2023; 103:110566. [PMID: 36539001 DOI: 10.1016/j.cellsig.2022.110566] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022]
Abstract
Breast cancer has overtaken lung cancer as the most prevalent cancer worldwide. The development of advanced drug resistance inhibits the efficacy of paclitaxel(PTX)as a first-line chemotherapeutic agent for breast cancer. Autophagy and microRNAs (miRNAs) play a key role in chemoresistance. This study investigated the miR-142-3p effect on PTX resistance by regulating autophagy. A PTX-resistant breast cancer cell line was constructed, and miR-142-3p and G protein beta polypeptide 2 (GNB2) were filtered out using RNA sequencing and protein microarray analysis. The study revealed that miR-142-3p expression was lower in drug-resistant cells compared parental cells. Higher miR-142-3p expression inhibited the viability, migration, and autophagic flux of drug-resistant cells, while promoting apoptosis and sensitivity to PTX treatment. Mechanistically, miR-142-3p was found to amend PTX resistance by targeting GNB2, further revealing that the knockdown of GNB2 expression could activate the AKT-mTOR pathway. This study suggests that GNB2 is an essential target for miR-142-3p to restrain autophagy, providing a new reference value for improving breast cancer PTX treatment.
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14
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Luo J, Wang S, Zhang L, Zhang L, Wu S, Zheng W, Huang X, Ye X, Wu M. Research advance and clinical implication of circZNF609 in human diseases. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2118076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Jieyi Luo
- Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Shengchun Wang
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan, Guangdong, PR China
| | - Lu Zhang
- Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Lu Zhang
- Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Shanshan Wu
- Department of Biology, School of Basic Medical Science, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Weirang Zheng
- Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Xueshan Huang
- Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Xiaoxia Ye
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
| | - Minhua Wu
- Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
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15
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Wang S, Wu J, Wang Z, Gong Z, Liu Y, Wang Z. Emerging Roles of Circ-ZNF609 in Multiple Human Diseases. Front Genet 2022; 13:837343. [PMID: 35938040 PMCID: PMC9353708 DOI: 10.3389/fgene.2022.837343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 06/03/2022] [Indexed: 12/11/2022] Open
Abstract
Circular RNAs (circRNAs) are a special type of endogenous RNAs with extensive roles in multiple human diseases. They are formed by back-splicing of partial sequences of the parental precursor mRNAs. Unlike linear RNAs, their covalently closed loop structure without a 5′ cap and a 3′ polyadenylated tail confers on them high stability and they are difficult to be digested by RNase R. Increasing evidence has proved that aberrant expressions of many circRNAs are detected and that circRNAs exert essential biological functions in disease development and progression via acting as a molecular sponge of microRNA, interacting with proteins as decoys or scaffolds, or self-encoding small peptides. Circular RNA zinc finger protein 609 (circ-ZNF609) originates from exon2 of ZNF609, which is located at chromosome 15q22.31, and it has recently been proved that it can translate into a protein. Being aberrantly upregulated in various diseases, it could promote malignant progression of human tumors, as well as tumor cell proliferation, migration, and invasion. Here in this review, we concluded the biological functions and potential mechanisms of circ-ZNF609 in multiple diseases, which could be further explored as a targetable molecule in future accurate diagnosis and prognosis.
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Affiliation(s)
| | | | | | | | - Yiyang Liu
- *Correspondence: Yiyang Liu, ; Zengjun Wang,
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16
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Li G, Lin Y, Luo J, Xiao Q, Liang C. GGAECDA: predicting circRNA-disease associations using graph autoencoder based on graph representation learning. Comput Biol Chem 2022; 99:107722. [DOI: 10.1016/j.compbiolchem.2022.107722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/25/2022] [Accepted: 06/30/2022] [Indexed: 11/27/2022]
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17
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Xiao J, Joseph S, Xia M, Teng F, Chen X, Huang R, Zhai L, Deng W. Circular RNAs Acting as miRNAs’ Sponges and Their Roles in Stem Cells. J Clin Med 2022; 11:jcm11102909. [PMID: 35629034 PMCID: PMC9145679 DOI: 10.3390/jcm11102909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/10/2022] [Accepted: 05/18/2022] [Indexed: 12/04/2022] Open
Abstract
Circular RNAs (circRNAs), a novel type of endogenous RNAs, have become a subject of intensive research. It has been found that circRNAs are important players in cell differentiation and tissue homeostasis, as well as disease development. Moreover, the expression of circRNAs is usually not correlated with their parental gene expression, indicating that they are not only a steady-state by-product of mRNA splicing but a product of variable splicing under novel regulation. Sequence conservation analysis has also demonstrated that circRNAs have important non-coding functions. CircRNAs exist as a covalently closed loop form in mammalian cells, where they regulate cellular transcription and translation processes. CircRNAs are built from pre-messenger RNAs, and their biogenesis involves back-splicing, which is catalyzed by spliceosomes. The splicing reaction gives rise to three different types of intronic, exotic and exon–intron circular RNAs. Due to higher nuclease stability and longer half lives in cells, circRNAs are more stable than linear RNAs and have enormous clinical advantage for use as diagnostic and therapeutic biomarkers for disease. In recent years, it has been reported that circRNAs in stem cells play a crucial role in stem cell function. In this article, we reviewed the general feature of circRNAs and the distinct roles of circRNAs in stem cell biology, including regulation of stem cell self-renewal and differentiation. CircRNAs have shown unique expression profiles during differentiation of stem cells and could serve as promising biomarkers of these cells. As circRNAs play pivotal roles in stem cell regulation as well as the development and progression of various diseases, we also discuss opportunities and challenges of circRNA-based treatment strategies in future effective therapies for promising clinical applications.
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Affiliation(s)
- Juan Xiao
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Shija Joseph
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Mengwei Xia
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Feng Teng
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Xuejiao Chen
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Rufeng Huang
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
| | - Lihong Zhai
- School of Basic Medicine, Hubei University of Arts and Science, Xiangyang 441053, China; (J.X.); (S.J.); (M.X.); (F.T.); (X.C.); (R.H.)
- Correspondence: (L.Z.); (W.D.)
| | - Wenbin Deng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 510060, China
- Jiangxi Deshang Pharmaceutical Co., Ltd., Zhangshu 336000, China
- Correspondence: (L.Z.); (W.D.)
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18
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Kristensen LS, Jakobsen T, Hager H, Kjems J. The emerging roles of circRNAs in cancer and oncology. Nat Rev Clin Oncol 2022; 19:188-206. [PMID: 34912049 DOI: 10.1038/s41571-021-00585-y] [Citation(s) in RCA: 413] [Impact Index Per Article: 206.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2021] [Indexed: 12/14/2022]
Abstract
Over the past decade, circular RNAs (circRNAs) have emerged as a large class of primarily non-coding RNA molecules, many of which have key roles in cancer development and progression through diverse mechanisms of action. CircRNAs often have tissue-restricted and cancer-specific expression patterns, and accumulating data suggest that these molecules are of potential clinical relevance and utility. In particular, circRNAs have strong potential as diagnostic, prognostic and predictive biomarkers, which is underscored by their detectability in liquid biopsy samples such as in plasma, saliva and urine. However, technical issues in the detection and assessment of circRNAs as well as biological knowledge gaps need to be addressed to move this relatively young field of research forward and bring circRNAs to the forefront of clinical practice. Herein, we review the current knowledge regarding circRNA biogenesis, regulation and functions in cancer as well as their clinical potential as biomarkers, therapeutic agents and drug targets.
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Affiliation(s)
| | | | - Henrik Hager
- Department of Clinical Pathology, Vejle Hospital, Vejle, Denmark.,Danish Colorectal Cancer Center South, Vejle Hospital, Vejle, Denmark
| | - Jørgen Kjems
- Department of Molecular Biology and Genetics (MBG), Aarhus University, Aarhus C, Denmark. .,Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark.
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19
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GTF2E2 is a novel biomarker for recurrence after surgery and promotes progression of esophageal squamous cell carcinoma via miR-139-5p/GTF2E2/FUS axis. Oncogene 2021; 41:782-796. [PMID: 34853466 PMCID: PMC8816730 DOI: 10.1038/s41388-021-02122-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 11/05/2021] [Accepted: 11/15/2021] [Indexed: 11/22/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most lethal gastrointestinal malignancies with high mortality. Recurrence develops within only a few years after curative resection and perioperative adjuvant therapy in 30–50% of these patients. Therefore, it is essential to identify postoperative recurrence biomarkers to facilitate selecting the following surveillance and therapeutic strategies. The general transcription factor IIE subunit beta (GTF2E2) is crucial for physiological and pathological functions, but its roles in the aggression and recurrence of ESCC remain ambiguous. In this study, we found that GTF2E2 was highly expressed in ESCC samples, and elevated GTF2E2 expression predicted early recurrence after surgery for ESCC patients. High expression of GTF2E2 associated with more aggressive clinic features and poor prognosis. GTF2E2 promoted the proliferation and mobility of ESCC cells in vitro and in vivo. We further revealed that miR-139-5p repressed GTF2E2 expression by downregulating its mRNA through binding with Argonaute 2 (Ago2). Rescue assays suggested that miR-139-5p affected GTF2E2-mediated ESCC progression. Moreover, GTF2E2 positively interacted with FUS promoter and regulated FUS expression, and the phenotype changes caused by GTF2E2 manipulation were recovered by rescuing FUS expression in ESCC cells. Additionally, we demonstrated that GTF2E2 promotes ESCC cells progression via activation of the AKT/ERK/mTOR pathway. In conclusion, GTF2E2 may serve as a novel biomarker for recurrence after surgery and a potential therapeutic target for ESCC patients, and it promotes ESCC progression via miR-139-5p/GTF2E2/FUS axis.
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20
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Zhang S, Sun J, Gu M, Wang G, Wang X. Circular RNA: A promising new star for the diagnosis and treatment of colorectal cancer. Cancer Med 2021; 10:8725-8740. [PMID: 34796685 PMCID: PMC8683543 DOI: 10.1002/cam4.4398] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/18/2021] [Accepted: 10/19/2021] [Indexed: 12/11/2022] Open
Abstract
Background Colorectal cancer (CRC) is one of the most common malignant tumors of the digestive tract. According to the research of circular RNAs in the CRC field, compared with linear RNAs, circular RNAs are a special type of noncoding RNA that are covalently closed circular structures, which have no 5' cap structure and 3' polyA tail and are not affected by RNA exonuclease and actinomycin D. Biological functions Notably, circular RNAs have a high degree of stability and potential effect on gene regulation. Meanwhile, circular RNAs are involved in the sponge action of microRNAs and mediate protein translation and direct binding, alternative splicing, and histone modification. Relationships with CRC Studies have shown that circular RNAs are related to the proliferation, invasion, recurrence, metastasis, ferroptosis, apoptosis, and chemotherapy resistance of CRC. Conclusions This article provides a brief review based on the source, structural characteristics, mechanisms, biological functions of circular RNAs, and the relationships between CRC.
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Affiliation(s)
- Shunhao Zhang
- Graduate School of Nantong University, Nantong, China
| | - Jing Sun
- Graduate School of Nantong University, Nantong, China
| | - Minqi Gu
- Graduate School of Nantong University, Nantong, China
| | - Guihua Wang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Xudong Wang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, China
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21
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Qian Y, Li Y, Li R, Yang T, Jia R, Ge YZ. circ-ZNF609: A potent circRNA in human cancers. J Cell Mol Med 2021; 25:10349-10361. [PMID: 34697887 PMCID: PMC8581316 DOI: 10.1111/jcmm.16996] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/22/2021] [Accepted: 09/30/2021] [Indexed: 12/11/2022] Open
Abstract
Circular RNAs (circRNAs) are a novel group of endogenous RNAs with a circular structure. Growing evidence indicates that circRNAs are involved in a variety of human diseases including malignancies. CircRNA ZNF609 (circ‐ZNF609), derived from the ZNF609 gene sequence, has been demonstrated to be involved in the development and progression of many diseases. circ‐ZNF609 is thought to be a viable diagnostic and prognostic biomarker for several diseases and might be a new therapeutic target, but further research is needed to accelerate clinical application. Here, we review the biogenesis and function of circRNAs and the functional roles and molecular mechanism related to circ‐ZNF609 in neoplasms and other diseases.
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Affiliation(s)
- Yiguan Qian
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Yang Li
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Rongfei Li
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Tianli Yang
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Ruipeng Jia
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Yu-Zheng Ge
- Department of Urology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
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22
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Dong H, Zhou J, Cheng Y, Wang M, Wang S, Xu H. Biogenesis, Functions, and Role of CircRNAs in Lung Cancer. Cancer Manag Res 2021; 13:6651-6671. [PMID: 34466035 PMCID: PMC8403226 DOI: 10.2147/cmar.s324812] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/09/2021] [Indexed: 12/24/2022] Open
Abstract
CircRNAs, a class of endogenous non-coding RNAs with closed-loop structures, have attracted increasing attention because of their good stability, high specificity of tissue expression, long half-life, and highly conserved sequence. CircRNAs have multiple biological functions, including miRNA sponge, transcription regulator, protein translation, interaction with protein, RNA maturation, and so on. These functions indicate the important role of circRNAs in tumorigenesis and malignant progression and their potential as potent diagnostic biomarkers and therapeutic molecules. In recent years, an increasing body of evidence suggests that circRNAs play a crucial role in proliferation, migration, invasion, and apoptosis of lung cancer cells. Therefore, circRNAs have gradually become a research focus in the diagnosis and treatment of lung cancer patients. This review summarizes the classification, biogenesis, and function of circRNAs, and discusses the role of circRNAs in the diagnosis, prognosis, and treatment of lung cancer patients.
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Affiliation(s)
- Huanhuan Dong
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
| | - Junliang Zhou
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
| | - Yue Cheng
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
| | - Meiqi Wang
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
| | - Shuqing Wang
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
| | - Hui Xu
- Department of Clinical Laboratory, Harbin Medical University Cancer Hospital, Harbin, 150081, People's Republic of China
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23
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Duan J, Cai H, Huang Y, Shi L. SNAI2-Induced CircMTO1 Promotes Cell Proliferation and Inhibits Apoptosis Through the miR-320b/MCL1 Axis in Human Granulosa-Like Tumor Cells. Front Genet 2021; 12:689916. [PMID: 34413875 PMCID: PMC8369758 DOI: 10.3389/fgene.2021.689916] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/12/2021] [Indexed: 11/29/2022] Open
Abstract
Polycystic ovary syndrome (PCOS), one of the most common types of endocrine diseases, is characterized by a high prevalence among women of reproductive-age. However, its pathogenesis and molecular mechanisms remain unclear. CircMTO1 has been reported to participate in numerous biological processes, but, its role in PCOS progression remains unknown. In the current study, we elucidated the expression and circRNA characterization of circMTO1 in human granulosa-like tumor cells. We found that circMTO1 knockdown promoted human granulosa-like tumor cell proliferation and inhibited its apoptosis rate. Next, we explored the underlying molecular mechanisms by using a series of experiments. Our results revealed the effect of the novel circMTO1/miR-320b/MCL1 axis in human granulosa-like tumor cells. Furthermore, we found that the expression of circMTO1 was induced by Snail family transcriptional repressor 2 (SNAI2) in human granulosa-like tumor cells. Our results may provide potential targets for PCOS research and a novel direction for the diagnosis and treatment of PCOS.
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Affiliation(s)
- Jie Duan
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Wuhan, China.,Department of Gynecology, Women and Children's Hospital of Hubei Province, Wuhan, China
| | - Hongning Cai
- Department of Gynecology II, Maternal and Child Health Hospital of Hubei Province, Wuhan, China.,Department of Gynecology II, Women and Children's Hospital of Hubei Province, Wuhan, China
| | - Yanming Huang
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Wuhan, China.,Department of Gynecology, Women and Children's Hospital of Hubei Province, Wuhan, China
| | - Liangyan Shi
- Department of Gynecology, Maternal and Child Health Hospital of Hubei Province, Wuhan, China.,Department of Gynecology, Women and Children's Hospital of Hubei Province, Wuhan, China
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24
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Huang Y, Zhu Q. Mechanisms Regulating Abnormal Circular RNA Biogenesis in Cancer. Cancers (Basel) 2021; 13:cancers13164185. [PMID: 34439339 PMCID: PMC8391333 DOI: 10.3390/cancers13164185] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 01/22/2023] Open
Abstract
Simple Summary Circular RNAs (circRNAs) are circular RNA molecules without a 5′ cap and a 3′ poly(A) tail structure, which play an important role in tumor development, invasion and metastasis, etc. However, the mechanism of circRNA dysregulation in cancer remains unclear. Different from the classic splicing of linear RNA, circRNA is formed by back-splicing and is regulated by many cis-acting elements and trans-acting proteins. Exploring how the dysregulation of cis-regulatory elements and trans-acting proteins in tumor cells affects the biogenesis of circRNA, which in turn affects the development and prognosis of cancer, is of great significance for circRNA to become a cancer biomarker and therapeutic target. Abstract Circular RNAs (circRNAs), which are a class of endogenous RNA with covalently closed loops, play important roles in epigenetic regulation of gene expression at both the transcriptional and post-transcriptional level. Accumulating evidence demonstrated that numerous circRNAs were abnormally expressed in tumors and their dysregulation was involved in the tumorigenesis and metastasis of cancer. Although the functional mechanisms of many circRNAs have been revealed, how circRNAs are dysregulated in cancer remains elusive. CircRNAs are generated by a “back-splicing” process, which is regulated by different cis-regulatory elements and trans-acting proteins. Therefore, how these cis and trans elements change during tumorigenesis and how they regulate the biogenesis of circRNAs in cancer are two questions that interest us. In this review, we summarized the pathways for the biogenesis of circRNAs; and then illustrated how circRNAs dysregulated in cancer by discussing the changes of cis-regulatory elements and trans-acting proteins that related to circRNA splicing and maturation in cancer.
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Affiliation(s)
| | - Qubo Zhu
- Correspondence: ; Tel.: +86-18670318650
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25
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Liu Q, Cui W, Yang C, Du LP. Circular RNA ZNF609 drives tumor progression by regulating the miR-138-5p/SIRT7 axis in melanoma. Aging (Albany NY) 2021; 13:19822-19834. [PMID: 34370715 PMCID: PMC8386576 DOI: 10.18632/aging.203394] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/09/2021] [Indexed: 12/22/2022]
Abstract
Melanoma serves as a prevailing and lethal skin malignancy with high mortality and a growing number of patients globally. Circular RNAs (circRNAs), as a type of emerging cellular regulator, are involved in the modulation of melanoma. Nevertheless, the function of circZNF609 in melanoma development remains obscure. In this study, we were interested in the effect and the underlying mechanism of circZNF609 on DNA damage during melanoma progression. The circZNF609 depletion significantly suppressed melanoma cell invasion, migration, and proliferation, and stimulated apoptosis. Meanwhile, comet assays showed that the tail length and γH2AX levels were elevated by circZNF609 depletion. Mechanically, circZNF609 sponged miR-138-5p and miR-138-5p targeted SIRT7 in the melanoma cells. The SIRT7 overexpression and miR-138-5p inhibitor could reverse circZNF609 depletion-mediated DNA damage and malignant progression in melanoma cells. Functionally, CircZNF609 promoted cell growth of melanoma in the nude mice. Consequently, we conclude that circZNF609 suppresses DNA damage and potentially enhances melanoma progression at the experimental condition by modulating the miR-138-5p/SIRT7 axis. Our finding provides new insights into the mechanism by which circZNF609 modulates the development of melanoma. CircZNF609 and miR-138-5p may be utilized as therapeutic targets for melanoma.
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Affiliation(s)
- Quan Liu
- Department of Plastic Surgery, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan, China
| | - Wei Cui
- Department of Plastic Surgery, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan, China
| | - Chao Yang
- Department of Traditional Chinese Medicine Surgery, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan, China
| | - Li-Ping Du
- Department of Plastic Surgery, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan, China
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26
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Wild-Type and Mutant FUS Expression Reduce Proliferation and Neuronal Differentiation Properties of Neural Stem Progenitor Cells. Int J Mol Sci 2021; 22:ijms22147566. [PMID: 34299185 PMCID: PMC8304973 DOI: 10.3390/ijms22147566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 02/07/2023] Open
Abstract
Nervous system development involves proliferation and cell specification of progenitor cells into neurons and glial cells. Unveiling how this complex process is orchestrated under physiological conditions and deciphering the molecular and cellular changes leading to neurological diseases is mandatory. To date, great efforts have been aimed at identifying gene mutations associated with many neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS). Mutations in the RNA/DNA binding protein Fused in Sarcoma/Translocated in Liposarcoma (FUS/TLS) have been associated with motor neuron degeneration in rodents and humans. Furthermore, increased levels of the wild-type protein can promote neuronal cell death. Despite the well-established causal link between FUS mutations and ALS, its role in neural cells remains elusive. In order to shed new light on FUS functions we studied its role in the control of neural stem progenitor cell (NSPC) properties. Here, we report that human wild-type Fused in Sarcoma (WT FUS), exogenously expressed in mouse embryonic spinal cord-derived NSPCs, was localized in the nucleus, caused cell cycle arrest in G1 phase by affecting cell cycle regulator expression, and strongly reduced neuronal differentiation. Furthermore, the expression of the human mutant form of FUS (P525L-FUS), associated with early-onset ALS, drives the cells preferentially towards a glial lineage, strongly reducing the number of developing neurons. These results provide insight into the involvement of FUS in NSPC proliferation and differentiation into neurons and glia.
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