1
|
Zhang H, Zhong L, Wang M, Wan P, Chu X, Chen S, Zhou Z, Shao X, Liu B. p110CUX1 promotes acute myeloid leukemia progression via regulating pyridoxal phosphatase expression and activating PI3K/AKT/mTOR signaling pathway. Mol Carcinog 2024. [PMID: 38994801 DOI: 10.1002/mc.23793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 06/07/2024] [Accepted: 07/01/2024] [Indexed: 07/13/2024]
Abstract
As an evolutionarily conserved transcription factor, Cut-like homeobox 1 (CUX1) plays crucial roles in embryonic and nervous system development, cell differentiation, and DNA damage repair. One of its major isoforms, p110CUX1, exhibits stable DNA binding capabilities and contributes to the regulation of cell cycle progression, proliferation, migration, and invasion. While p110CUX1 has been implicated in the progression of various malignant tumors, its involvement in acute myeloid leukemia (AML) remains uncertain. This study aims to elucidate the role of p110CUX1 in AML. Our findings reveal heightened expression levels of both p110CUX1 and pyridoxal phosphatase (PDXP) in AML cell lines. Overexpression of p110CUX1 promotes AML cell proliferation while inhibiting apoptosis and differentiation, whereas knockdown of PDXP yields contrasting effects. Mechanistically, p110CUX1 appears to facilitate AML development by upregulating PDXP expression and activating the PI3K/AKT/mTOR signaling pathway. Animal experimental corroborate the pro-AML effect of p110CUX1. These results provide experimental evidence supporting the involvement of the p110CUX1-PDXP-PI3K/AKT/mTOR axis in AML progression. Hence, targeting p110CUX1 may hold promise as a therapeutic strategy for AML.
Collapse
Affiliation(s)
- Hongyan Zhang
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Liang Zhong
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Meng Wang
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Peng Wan
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Xuan Chu
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Shuyu Chen
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Ziwei Zhou
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Xin Shao
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Beizhong Liu
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| |
Collapse
|
2
|
Chen Y, Zhang K, Zhang R, Wang Z, Yang L, Zhao T, Zhang S, Lin Y, Zhao H, Liu Y, Wei Y, Zhou Y, Zhang J, Ye X, Zhao J, Li X, Que J, Shi S, Liu K. Targeting the SOX2/CDP protein complex with a peptide suppresses the malignant progression of esophageal squamous cell carcinoma. Cell Death Discov 2023; 9:399. [PMID: 37891174 PMCID: PMC10611744 DOI: 10.1038/s41420-023-01693-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/28/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Emerging evidence indicates that SOX2 is an oncogene for esophageal squamous cell carcinoma (ESCC). However, direct targeting of SOX2 is not feasible given that this transcription factor plays important roles in the maintenance of tissues such as the brain. Here, we identified CDP (Homeobox protein cut-like 1 or CASP) as a unique SOX2 binding partner enriched in ESCC with Duolink proximity ligation assay, bimolecular fluorescence complementation (BiFc) and immunoprecipitation. We then screened a peptide aptamer library using BiFc and immunoprecipitation and identified several peptide aptamers, including P58, that blocked the CDP/SOX2 interaction, leading to the inhibition of ESCC progress in vitro and in vivo. Upon administration, synthetic peptide P58, containing the YGRKKRRQRRR cell-penetrating peptide and the fluorophore TAMRA, also blocked the growth and metastasis of ESCC in both mice and zebrafish. Therefore, targeting the SOX2 binding partner CDP with peptide P58 offers an alternative avenue to treat ESCC with increased SOX2 levels.
Collapse
Affiliation(s)
- Yunyun Chen
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Kun Zhang
- Department of General Surgery, Fuzhou First General Hospital affiliated with Fujian Medical University, Fuzhou, Fujian, 350009, P. R. China
| | - Rui Zhang
- Department of Laboratory Medicine, The Second Hospital of Fuzhou, Fuzhou, Fujian, 350007, P. R. China
| | - Zhuo Wang
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Liang Yang
- Westlake University, Hangzhou, Zhejiang, 310024, P. R. China
| | - Tingting Zhao
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Shihui Zhang
- Centre for Translational Stem Cell Biology, School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, 999077, P. R. China
| | - Yong Lin
- Science and Technology Service Center, Fujian Health College, Fuzhou, Fujian, 350101, P. R. China
| | - Hongzhou Zhao
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yongpan Liu
- School of Life Science, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yuxuan Wei
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Yijian Zhou
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Jiaying Zhang
- School of Life Science, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Xianzong Ye
- Department of Pathology, 900 Hospital of the Joint Logistics Team (Dongfang Hospital, Xiamen University), Fuzhou, Fujian, 350025, P. R. China
| | - Jing Zhao
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Xinxin Li
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China
| | - Jianwen Que
- Department of Medicine, Columbia University Medical Center, New York, NY, 10032, USA
| | - Songlin Shi
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China.
| | - Kuancan Liu
- Central Laboratory, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China.
- School of Medicine, Xiamen University, Xiamen, Fujian, 361102, P. R. China.
- School of Life Science, Nanchang Normal University, Nanchang, Jiangxi, 330032, P. R. China.
| |
Collapse
|
3
|
Kos J, Mitrović A, Perišić Nanut M, Pišlar A. Lysosomal peptidases – Intriguing roles in cancer progression and neurodegeneration. FEBS Open Bio 2022; 12:708-738. [PMID: 35067006 PMCID: PMC8972049 DOI: 10.1002/2211-5463.13372] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/04/2022] [Accepted: 01/20/2022] [Indexed: 11/16/2022] Open
Abstract
Lysosomal peptidases are hydrolytic enzymes capable of digesting waste proteins that are targeted to lysosomes via endocytosis and autophagy. Besides intracellular protein catabolism, they play more specific roles in several other cellular processes and pathologies, either within lysosomes, upon secretion into the cell cytoplasm or extracellular space, or bound to the plasma membrane. In cancer, lysosomal peptidases are generally associated with disease progression, as they participate in crucial processes leading to changes in cell morphology, signaling, migration, and invasion, and finally metastasis. However, they can also enhance the mechanisms resulting in cancer regression, such as apoptosis of tumor cells or antitumor immune responses. Lysosomal peptidases have also been identified as hallmarks of aging and neurodegeneration, playing roles in oxidative stress, mitochondrial dysfunction, abnormal intercellular communication, dysregulated trafficking, and the deposition of protein aggregates in neuronal cells. Furthermore, deficiencies in lysosomal peptidases may result in other pathological states, such as lysosomal storage disease. The aim of this review was to highlight the role of lysosomal peptidases in particular pathological processes of cancer and neurodegeneration and to address the potential of lysosomal peptidases in diagnosing and treating patients.
Collapse
Affiliation(s)
- Janko Kos
- University of Ljubljana Faculty of Pharmacy Aškerčeva 7 1000 Ljubljana Slovenia
- Jožef Stefan Institute Department of Biotechnology Jamova 39 1000 Ljubljana Slovenia
| | - Ana Mitrović
- Jožef Stefan Institute Department of Biotechnology Jamova 39 1000 Ljubljana Slovenia
| | - Milica Perišić Nanut
- Jožef Stefan Institute Department of Biotechnology Jamova 39 1000 Ljubljana Slovenia
| | - Anja Pišlar
- University of Ljubljana Faculty of Pharmacy Aškerčeva 7 1000 Ljubljana Slovenia
| |
Collapse
|
4
|
Krishnan M, Senagolage MD, Baeten JT, Wolfgeher DJ, Khan S, Kron SJ, McNerney ME. Genomic studies controvert the existence of the CUX1 p75 isoform. Sci Rep 2022; 12:151. [PMID: 34997000 PMCID: PMC8741762 DOI: 10.1038/s41598-021-03930-4] [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: 08/21/2021] [Accepted: 12/13/2021] [Indexed: 01/19/2023] Open
Abstract
CUX1, encoding a homeodomain-containing transcription factor, is recurrently deleted or mutated in multiple tumor types. In myeloid neoplasms, CUX1 deletion or mutation carries a poor prognosis. We have previously established that CUX1 functions as a tumor suppressor in hematopoietic cells across multiple organisms. Others, however, have described oncogenic functions of CUX1 in solid tumors, often attributed to truncated CUX1 isoforms, p75 and p110, generated by an alternative transcriptional start site or post-translational cleavage, respectively. Given the clinical relevance, it is imperative to clarify these discrepant activities. Herein, we sought to determine the CUX1 isoforms expressed in hematopoietic cells and find that they express the full-length p200 isoform. Through the course of this analysis, we found no evidence of the p75 alternative transcript in any cell type examined. Using an array of orthogonal approaches, including biochemistry, proteomics, CRISPR/Cas9 genomic editing, and analysis of functional genomics datasets across a spectrum of normal and malignant tissue types, we found no data to support the existence of the CUX1 p75 isoform as previously described. Based on these results, prior studies of p75 require reevaluation, including the interpretation of oncogenic roles attributed to CUX1.
Collapse
Affiliation(s)
- Manisha Krishnan
- Committee on Cancer Biology, The University of Chicago, Chicago, IL, USA.,Department of Pathology, The University of Chicago, Chicago, IL, USA
| | | | - Jeremy T Baeten
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Donald J Wolfgeher
- Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, IL, USA
| | - Saira Khan
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Stephen J Kron
- Committee on Cancer Biology, The University of Chicago, Chicago, IL, USA.,Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, IL, USA.,The University of Chicago Medicine Comprehensive Cancer Center, University of Chicago, Chicago, IL, USA
| | - Megan E McNerney
- Committee on Cancer Biology, The University of Chicago, Chicago, IL, USA. .,Department of Pathology, The University of Chicago, Chicago, IL, USA. .,Department of Pediatrics, The University of Chicago, Chicago, IL, USA. .,The University of Chicago Medicine Comprehensive Cancer Center, University of Chicago, Chicago, IL, USA.
| |
Collapse
|
5
|
Feng F, Zhao Z, Zhou Y, Cheng Y, Wu X, Heng X. CUX1 Facilitates the Development of Oncogenic Properties Via Activating Wnt/β-Catenin Signaling Pathway in Glioma. Front Mol Biosci 2021; 8:705008. [PMID: 34422906 PMCID: PMC8377541 DOI: 10.3389/fmolb.2021.705008] [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: 05/04/2021] [Accepted: 07/26/2021] [Indexed: 11/30/2022] Open
Abstract
Background: Homeobox cut like 1 (CUX1), which often presents aberrated expression in many cancer cells, exerts a crucial role in tumorigenesis. Evidence describing CUX1 in gliomagenesis is scarce, and the effects of CUX1 on the Wnt/β-catenin pathway have not been reported. Our study aimed to explore the biological functions and molecular mechanisms involved in CUX1 activity in glioma. Methods: Datasets for bioinformatics analysis were obtained from the GEO, TCGA, CGGA, GTEX and CCLE databases. qRT-PCR, western blotting (WB), and immunohistochemistry (IHC) assays were used to investigate the expression patterns of CUX1 among glioma and brain tissues. CUX1 knockdown and overexpression vectors were transfected into glioma cell lines, the CCK-8, clone formation assay, wound healing, Transwell assay, and flow cytometry were performed to detect changes in cell viability, invasiveness, and the cell cycle. WB and immunofluorescence (IF) assays were used to explore changes in cell cycle-related and Wnt/β-catenin signaling protein levels. Results: Overexpression of CUX1 was identified in glioma tissues, and especially in glioblastoma (GBM), when compared to normal controls and correlated with poor prognosis. In comparison with untreated cells, TJ905 glioma cells overexpressing CUX1 showed higher proliferation and invasion abilities and S phase cell-cycle arrest, while the knockdown of CUX1 suppressed cell invasive ability and induced G1 phase arrest. Active Wnt/β-catenin signaling was enriched and clustered in a CUX1-associated GSEA/GSVA analysis. IF and WB assays indicated that CUX1 regulated the distribution of Axin2/β-catenin in glioma cells and regulated the expression of proteins downstream of the Wnt/β-catenin signaling pathway, suggesting that CUX1 served as an upstream positive regulator of the Wnt/β-catenin pathway. Finally, the knockdown of Axin2 or β-catenin could reverse the tumor-promoting effects caused by CUX1 overexpression, suggesting that CUX1 induced gliomagenesis and malignant phenotype by activating the Wnt/β-catenin signaling pathway. Conclusion: Our data suggested that the transcription factor CUX1 could be a novel therapeutic target for glioma with gene therapy.
Collapse
Affiliation(s)
- Fan Feng
- Institute of Clinical Medicine College, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Brain Science and Brain-Like Intelligence, Linyi People's Hospital, Linyi, China.,Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| | - Zongqing Zhao
- Institute of Brain Science and Brain-Like Intelligence, Linyi People's Hospital, Linyi, China.,Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| | - Yunfei Zhou
- Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| | - Yanhao Cheng
- Institute of Brain Science and Brain-Like Intelligence, Linyi People's Hospital, Linyi, China.,Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| | - Xiujie Wu
- Institute of Brain Science and Brain-Like Intelligence, Linyi People's Hospital, Linyi, China.,Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| | - Xueyuan Heng
- Institute of Brain Science and Brain-Like Intelligence, Linyi People's Hospital, Linyi, China.,Department of Neurosurgery, Linyi People's Hospital, Linyi, China
| |
Collapse
|
6
|
Pterostilbene Changes Epigenetic Marks at Enhancer Regions of Oncogenes in Breast Cancer Cells. Antioxidants (Basel) 2021; 10:antiox10081232. [PMID: 34439480 PMCID: PMC8388921 DOI: 10.3390/antiox10081232] [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: 06/06/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/15/2022] Open
Abstract
Epigenetic aberrations are linked to sporadic breast cancer. Interestingly, certain dietary polyphenols with anti-cancer effects, such as pterostilbene (PTS), have been shown to regulate gene expression by altering epigenetic patterns. Our group has proposed the involvement of DNA methylation and DNA methyltransferase 3B (DNMT3B) as vital players in PTS-mediated suppression of candidate oncogenes and suggested a role of enhancers as target regions. In the present study, we assess a genome-wide impact of PTS on epigenetic marks at enhancers in highly invasive MCF10CA1a breast cancer cells. Following chromatin immunoprecipitation (ChIP)-sequencing in MCF10CA1a cells treated with 7 μM PTS for 9 days, we discovered that PTS leads to increased binding of DNMT3B at enhancers of 77 genes, and 17 of those genes display an overlapping decrease in the occupancy of trimethylation at lysine 36 of histone 3 (H3K36me3), a mark of active enhancers. We selected two genes, PITPNC1 and LINC00910, and found that their enhancers are hypermethylated in response to PTS. These changes coincided with the downregulation of gene expression. Of importance, we showed that 6 out of 17 target enhancers, including PITPNC1 and LINC00910, are bound by an oncogenic transcription factor OCT1 in MCF10CA1a cells. Indeed, the six enhancers corresponded to genes with established or putative cancer-driving functions. PTS led to a decrease in OCT1 binding at those enhancers, and OCT1 depletion resulted in PITPNC1 and LINC00910 downregulation, further demonstrating a role for OCT1 in transcriptional regulation. Our findings provide novel evidence for the epigenetic regulation of enhancer regions by dietary polyphenols in breast cancer cells.
Collapse
|
7
|
Ramdzan ZM, Vickridge E, Faraco CCF, Nepveu A. CUT Domain Proteins in DNA Repair and Cancer. Cancers (Basel) 2021; 13:cancers13122953. [PMID: 34204734 PMCID: PMC8231510 DOI: 10.3390/cancers13122953] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/04/2021] [Accepted: 06/09/2021] [Indexed: 01/19/2023] Open
Abstract
Simple Summary Genetic integrity is ensured by complex groups of proteins involved in DNA repair. In particular, base damage is repaired by enzymes of the base excision repair pathway. Recent studies have revealed that some transcription factors can function as accessory factors that stimulate the enzymatic activities of these DNA repair enzymes. It is well known that defects in DNA repair mechanisms cause the accumulation of changes in DNA, called mutations, that increase the possibility that cells become tumorigenic. Paradoxically, once they have emerged certain cancer cells are acutely dependent on the heightened activities of base excision repair enzymes because their metabolism generates highly reactive molecules that cause multiple types of damage to bases. In this context, the function of accessory factors becomes essential to cancer cell survival. As a by-product of this adaptation, cancer cells become more resistant to therapies that cause DNA damage, such as chemotherapy and radiation. Abstract Recent studies revealed that CUT domains function as accessory factors that accelerate DNA repair by stimulating the enzymatic activities of the base excision repair enzymes OGG1, APE1, and DNA pol β. Strikingly, the role of CUT domain proteins in DNA repair is exploited by cancer cells to facilitate their survival. Cancer cells in which the RAS pathway is activated produce an excess of reactive oxygen species (ROS) which, if not counterbalanced by increased production of antioxidants, causes sustained oxidative DNA damage and, ultimately, cell senescence. These cancer cells can adapt by increasing their capacity to repair oxidative DNA damage in part through elevated expression of CUT domain proteins such as CUX1, CUX2, or SATB1. In particular, CUX1 overexpression was shown to cooperate with RAS in the formation of mammary and lung tumors in mice. Conversely, knockdown of CUX1, CUX2, or SATB1 was found to be synthetic lethal in cancer cells exhibiting high ROS levels as a consequence of activating mutations in KRAS, HRAS, BRAF, or EGFR. Importantly, as a byproduct of their adaptation, cancer cells that overexpress CUT domain proteins exhibit increased resistance to genotoxic treatments such as ionizing radiation, temozolomide, and cisplatin.
Collapse
Affiliation(s)
- Zubaidah M. Ramdzan
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada; (Z.M.R.); (E.V.); (C.C.F.F.)
| | - Elise Vickridge
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada; (Z.M.R.); (E.V.); (C.C.F.F.)
| | - Camila C. F. Faraco
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada; (Z.M.R.); (E.V.); (C.C.F.F.)
- Departments of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
| | - Alain Nepveu
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada; (Z.M.R.); (E.V.); (C.C.F.F.)
- Departments of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Departments of Medicine, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Departments of Oncology, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Correspondence: ; Tel.: +514-398-5839; Fax: +514-398-6769
| |
Collapse
|
8
|
CUX1 Enhances Pancreatic Cancer Formation by Synergizing with KRAS and Inducing MEK/ERK-Dependent Proliferation. Cancers (Basel) 2021; 13:cancers13102462. [PMID: 34070180 PMCID: PMC8158495 DOI: 10.3390/cancers13102462] [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] [Revised: 05/10/2021] [Accepted: 05/15/2021] [Indexed: 01/19/2023] Open
Abstract
Simple Summary In pancreatic cancer, CUX1 acts as an important mediator of tumor cell proliferation and resistance to apoptosis. Using two different mouse models for the prevalent CUX1 isoforms p200 and p110, we identified p110 CUX1 as the major isoform promoting pancreatic cancer formation in the context of mutant KRAS. We could show an enhanced proliferation by activating and potentiating MEK-ERK signaling via an increased upstream activation of the ADAM17-EGFR axis. This strengthened activation in a KRAS-dependent manner, leading to a dramatically more accelerated formation of invasive PDAC in p110 CUX1 mice within 4 weeks. These results provide the first in vivo evidence for the importance of CUX1 in the development of pancreatic cancer, and highlight CUX1-dependent signaling pathways as potential therapeutic targets. Abstract The transcription factor CUX1 has been implicated in either tumor suppression or progression, depending on the cancer entity and the prevalent CUX1 isoform. Previously, we could show that CUX1 acts as an important mediator of tumor cell proliferation and resistance to apoptosis in pancreatic cancer cell lines. However, in vivo evidence for its impact on pancreatic carcinogenesis, isoform-specific effects and downstream signaling cascades are missing. We crossbred two different CUX1 isoform mouse models (p200 CUX1 and p110 CUX1) with KC (KrasLSL-G12D/+; Ptf1aCre/+) mice, a genetic model for pancreatic precursor lesions (PanIN). In the context of oncogenic KRASs, both mice KCCux1p200 and KCCux1p110 led to increased PanIN formation and development of invasive pancreatic ductal adenocarcinomata (PDAC). In KCCux1p110 mice, tumor development was dramatically more accelerated, leading to formation of invasive PDAC within 4 weeks. In vitro and in vivo, we could show that CUX1 enhanced proliferation by activating MEK-ERK signaling via an upstream increase of ADAM17 protein, which in turn led to an activation of EGFR. Additionally, CUX1 further enhanced MEK-ERK activation through upregulation of the serine/threonine kinase MOS, phosphorylating MEK in a KRAS-independent manner. We identified p110 CUX1 as major driver of pancreatic cancer formation in the context of mutant KRAS. These results provide the first in vivo evidence for the importance of CUX1 in the development of pancreatic cancer, and highlight the importance of CUX1-dependent signaling pathways as potential therapeutic targets.
Collapse
|
9
|
Schleyer KA, Fetrow B, Zannes Fatland P, Liu J, Chaaban M, Ma B, Cui L. Dual-Mechanism Quenched Fluorogenic Probe Provides Selective and Rapid Detection of Cathepsin L Activity*. ChemMedChem 2021; 16:1082-1087. [PMID: 33295147 PMCID: PMC8202353 DOI: 10.1002/cmdc.202000823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Indexed: 12/18/2022]
Abstract
Cathepsin L (CTL) is a cysteine protease demonstrating upregulated activity in many disease states. Overlapping substrate specificity makes selective detection of CTL activity difficult to parse from that of its close homologue CTV and the ubiquitous CTB. Current probes of CTL activity have limited applications due to either poor contrast or extra assay steps required to achieve selectivity. We have developed a fluorogenic probe, CTLAP, that displays good selectivity for CTL over CTB and CTV while exhibiting low background fluorescence attributed to dual quenching mechanisms. CTLAP achieves optimum CTL selectivity in the first 10 min of incubation, thus suggesting that it is amenable for rapid detection of CTL, even in the presence of competing cathepsins.
Collapse
Affiliation(s)
- Kelton A Schleyer
- Department of Medicinal Chemistry, UF Health Science Center, UF Health Cancer Center, University of Florida, 1345 Center Dr., Gainesville, FL 32610, USA
- Department of Chemistry and Chemical Biology, UNM Comprehensive Cancer Center, University of New Mexico, 300 Terrace St. NE, Albuquerque, NM 87131, USA
| | - Ben Fetrow
- Department of Chemistry and Chemical Biology, UNM Comprehensive Cancer Center, University of New Mexico, 300 Terrace St. NE, Albuquerque, NM 87131, USA
| | - Peter Zannes Fatland
- Department of Chemistry and Chemical Biology, UNM Comprehensive Cancer Center, University of New Mexico, 300 Terrace St. NE, Albuquerque, NM 87131, USA
| | - Jun Liu
- Department of Medicinal Chemistry, UF Health Science Center, UF Health Cancer Center, University of Florida, 1345 Center Dr., Gainesville, FL 32610, USA
- Department of Chemistry and Chemical Biology, UNM Comprehensive Cancer Center, University of New Mexico, 300 Terrace St. NE, Albuquerque, NM 87131, USA
| | - Maya Chaaban
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way 118 DLC, Tallahassee, FL 32306, USA
| | - Biwu Ma
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way 118 DLC, Tallahassee, FL 32306, USA
| | - Lina Cui
- Department of Medicinal Chemistry, UF Health Science Center, UF Health Cancer Center, University of Florida, 1345 Center Dr., Gainesville, FL 32610, USA
- Department of Chemistry and Chemical Biology, UNM Comprehensive Cancer Center, University of New Mexico, 300 Terrace St. NE, Albuquerque, NM 87131, USA
| |
Collapse
|
10
|
Xu A, Wang X, Luo J, Zhou M, Yi R, Huang T, Lin J, Wu Z, Xie C, Ding S, Zeng Y, Song Y. Overexpressed P75CUX1 promotes EMT in glioma infiltration by activating β-catenin. Cell Death Dis 2021; 12:157. [PMID: 33542188 PMCID: PMC7862635 DOI: 10.1038/s41419-021-03424-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 12/24/2020] [Accepted: 01/11/2021] [Indexed: 01/19/2023]
Abstract
The homeobox protein cut-like 1 (CUX1) comprises three isoforms and has been shown to be involved in the development of various types of malignancies. However, the expression and role of the CUX1 isoforms in glioma remain unclear. Herein, we first identified that P75CUX1 isoform exhibited consistent expression among three isoforms in glioma with specifically designed antibodies to identify all CUX1 isoforms. Moreover, a significantly higher expression of P75CUX1 was found in glioma compared with non-tumor brain (NB) tissues, analyzed with western blot and immunohistochemistry, and the expression level of P75CUX1 was positively associated with tumor grade. In addition, Kaplan-Meier survival analysis indicated that P75CUX1 could serve as an independent prognostic indicator to identify glioma patients with poor overall survival. Furthermore, CUX1 knockdown suppressed migration and invasion of glioma cells both in vitro and in vivo. Mechanistically, this study found that P75CUX1 regulated epithelial-mesenchymal transition (EMT) process mediated via β-catenin, and CUX1/β-catenin/EMT is a novel signaling cascade mediating the infiltration of glioma. Besides, CUX1 was verified to promote the progression of glioma via multiple other signaling pathways, such as Hippo and PI3K/AKT. In conclusion, we suggested that P75CUX1 could serve as a potential prognostic indicator as well as a novel treatment target in malignant glioma.
Collapse
Affiliation(s)
- Anqi Xu
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Xizhao Wang
- Department of Neurosurgery, The First Hospital of Quanzhou Affiliated to Fujian Medical University, Quanzhou, Fujian, 362000, PR China
| | - Jie Luo
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Mingfeng Zhou
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Renhui Yi
- Department of Neurosurgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, 341000, PR China
| | - Tengyue Huang
- Department of Neurosurgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, 341000, PR China
| | - Jie Lin
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Zhiyong Wu
- Department of Neurosurgery, The Second Affiliated Hospital of the Chinese University of Hong Kong (Shenzhen), Shenzhen, Guangdong, 518116, PR China
| | - Cheng Xie
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Shengfeng Ding
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China
| | - Yu Zeng
- Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, Guangdong, 510515, PR China.
| | - Ye Song
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, PR China.
| |
Collapse
|
11
|
Wang Z, Shang J, Li Z, Li H, Zhang C, He K, Li S, Ju W. PIK3CA Is Regulated by CUX1, Promotes Cell Growth and Metastasis in Bladder Cancer via Activating Epithelial-Mesenchymal Transition. Front Oncol 2020; 10:536072. [PMID: 33344221 PMCID: PMC7744743 DOI: 10.3389/fonc.2020.536072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 10/29/2020] [Indexed: 01/19/2023] Open
Abstract
PIK3CA is a key component of phosphatidylinositol 3-kinase (PI3K) pathway that its involvement in tumorigenesis has been revealed by previous research. However, its functions and potential mechanisms in bladder cancer are still largely undiscovered. Tissue microarray (TMA) with 66 bladder cancer patients was surveyed via immunohistochemistry to evaluate the level of PIK3CA and CUX1 and we found upregulation of PIK3CA in bladder cancer tissue and patients with higher level of PIK3CA presented with poorer prognosis. Overly expressed PIK3CA promoted growth, migration, invasion, and metastasis of bladder cancer cells and knockdown of PIK3CA had the opposite effect. Gain-of-function and loss-of-function studies showed that PIK3CA expression was facilitated by CUX1, leading to activation of epithelial-mesenchymal transition (EMT), accompanied by upregulated expression of Snail, β-catenin, Vimentin and downregulated expression of E-cadherin in the bladder cancer cell lines. Besides, over-expressed CUX1 could restore the expression of downregulated Snail, β-catenin, Vimentin and E-cadherin which was induced by PIK3CA knockdown. These results revealed that PIK3CA overexpression in bladder cancer was regulated by the transcription factor CUX1, and PIK3CA exerted its biological effects by activating EMT.
Collapse
Affiliation(s)
- Zhongyu Wang
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun Shang
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhiqin Li
- Department of Pharmacy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huanhuan Li
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chufan Zhang
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Kai He
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shikang Li
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wen Ju
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
12
|
Wei R, Chen L, Qin D, Guo Q, Zhu S, Li P, Min L, Zhang S. Liquid Biopsy of Extracellular Vesicle-Derived miR-193a-5p in Colorectal Cancer and Discovery of Its Tumor-Suppressor Functions. Front Oncol 2020; 10:1372. [PMID: 33014778 PMCID: PMC7461920 DOI: 10.3389/fonc.2020.01372] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/29/2020] [Indexed: 12/27/2022] Open
Abstract
Previously, abnormal extracellular vesicle (EV) sorting of miR-193a was identified in colorectal cancer (CRC) progression. Although a reduced level of miR-193a-5p in plasma/serum has been reported in many different types of cancer, the EV-derived miR-193a-5p level in CRC and its potential application as a minimally invasive biomarker are still unknown. Here, we evaluated the circulating EV-derived miR-193a-5p expression levels in a cohort of 101 participants by real-time quantitative polymerase chain reaction (RT-qPCR). We found that plasma EV-miR-193a-5p decreased significantly in CRC patients as compared with precancerous colorectal adenoma (CA) and non-cancerous control (NC) individuals. The circulating EV-miR-193a-5p showed an area under the receiver operating characteristic curve (AUC) of 0.740 in distinguishing CRC from CA and an AUC of 0.759 in distinguishing CRC from NC. Furthermore, the suppression on CRC cells of miR-193a-5p was verified by transwell, MTS (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium), EdU, RT-qPCR, and western blotting. Bioinformatic analysis predicted 32 genes, which were the most likely miR-193a-5p targeted and mainly focused on tumor progression. Among them, we revealed that miR-193a-5p could inhibit CRC migration and invasion via targeting tumor-associated genes like CUT-like homeobox 1 (CUX1) and intersectin 1 (ITSN1). In conclusion, miR-193a-5p could suppress CRC development, and decreased plasma EV-miR-193a-5p could be a promising biomarker for human CRC detection.
Collapse
Affiliation(s)
- Rui Wei
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Lei Chen
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Da Qin
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Qingdong Guo
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Shengtao Zhu
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Peng Li
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Li Min
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Shutian Zhang
- Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Department of Gastroenterology, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
13
|
Maurizi E, Schiroli D, Zini R, Limongelli A, Mistò R, Macaluso C, Pellegrini G. A fine-tuned β-catenin regulation during proliferation of corneal endothelial cells revealed using proteomics analysis. Sci Rep 2020; 10:13841. [PMID: 32796906 PMCID: PMC7427785 DOI: 10.1038/s41598-020-70800-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 07/22/2020] [Indexed: 02/07/2023] Open
Abstract
Corneal endothelial (CE) dysfunction is the main indication for corneal transplantation, an invasive procedure with several limitations. Developing novel strategies to re-activate CE regenerative capacity is, therefore, of fundamental importance. This goal has proved to be challenging as corneal endothelial cells (CEnC) are blocked in the G0/G1 phase of the cell cycle in vivo and, albeit retaining proliferative capacity in vitro, this is further hindered by endothelial-to-mesenchymal transition. Herein we investigated the mechanisms regulating CEnC proliferation in vitro. Comparing the proteome of non-proliferating (in vivo-G0/G1) and proliferating (in vitro-G2/M) rabbit CEnC (rCEnC), 77 proteins, out of 3,328 identified, were differentially expressed in the two groups (p < 0.005). Literature and Gene Ontology analysis revealed β-catenin and transforming growth factor (TGF-β) pathways to be correlated with the identified proteins. Treatment of rCEnC with a β-catenin activator and inhibitor showed that β-catenin activation was necessary during rCEnC proliferation, but not sufficient for its induction. Furthermore, both pro-proliferative activity of basic fibroblast growth factor and anti-proliferative effects of TGF-β were regulated through β-catenin. Overall, these results provide novel insights into the molecular basis underlying the proliferation process that CEnC re-activate in vitro, consolidating the role of β-catenin and TGF-β.
Collapse
Affiliation(s)
- Eleonora Maurizi
- Centre for Regenerative Medicine "S. Ferrari", Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy.
- Department of Medicine and Surgery, Dentistry Center, University of Parma, Parma, Italy.
| | - Davide Schiroli
- Transfusion Medicine Unit, Azienda USL-IRCCS, Reggio Emilia, Italy
| | - Roberta Zini
- Centre for Regenerative Medicine "S. Ferrari", Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Claudio Macaluso
- Department of Medicine and Surgery, Dentistry Center, University of Parma, Parma, Italy
| | - Graziella Pellegrini
- Centre for Regenerative Medicine "S. Ferrari", Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy.
| |
Collapse
|
14
|
Liu N, Sun Q, Wan L, Wang X, Feng Y, Luo J, Wu H. CUX1, A Controversial Player in Tumor Development. Front Oncol 2020; 10:738. [PMID: 32547943 PMCID: PMC7272708 DOI: 10.3389/fonc.2020.00738] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/17/2020] [Indexed: 01/19/2023] Open
Abstract
CUX1 belongs to the homeodomain transcription factor family and is evolutionarily and functionally conserved from Drosophila to humans. In addition to the involvement in various physiological events including tissue development, cell proliferation, differentiation and migration, and DNA damage response, CUX1 has been implicated in tumorigenesis. Interestingly, CUX1 has been recently recognized as a haploinsufficient tumor suppressor, which is paradoxically overexpressed in tumor cells. While loss of heterozygosity and/or mutations of CUX1 have been frequently detected in many types of cancers, genomic amplification, and overexpression of CUX1 have also been reported in cancer tissues and are correlated with higher tumor grade and poor prognosis. Therefore, deciphering the roles of different CUX1 isoforms and in different tumor stages is required to establish a CUX1-based therapeutic strategy for cancer treatment.
Collapse
Affiliation(s)
- Ning Liu
- Department of Clinical Oncology, Taian City Central Hospital, Tai'an, China
| | - Qiliang Sun
- Department of Respiratory Medicine, Taian City Central Hospital, Tai'an, China
| | - Long Wan
- Department of Clinical Oncology, Taian City Central Hospital, Tai'an, China
| | - Xuan Wang
- Department of Liver Diseases, Central Laboratory, Institute of Clinical Immunology, ShuGuang Hospital Affiliated to Shanghai University of Chinese Traditional Medicine, Shanghai, China
| | - Yu Feng
- Department of General Surgery, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Judong Luo
- Department of Radiation Oncology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Hailong Wu
- Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China.,Collaborative Innovation Center for Biomedicine, Shanghai University of Medicine & Health Sciences, Shanghai, China.,Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine & Health Sciences, Shanghai, China
| |
Collapse
|
15
|
Dorris ER, O'Neill A, Treacy A, Klocker H, Teltsh O, Kay E, Watson RW. The transcription factor CUX1 negatively regulates invasion in castrate resistant prostate cancer. Oncotarget 2020; 11:846-857. [PMID: 32180898 PMCID: PMC7061738 DOI: 10.18632/oncotarget.27494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 01/29/2020] [Indexed: 12/15/2022] Open
Abstract
Metastatic prostate cancer is treated with androgen ablation therapy but progress to castrate resistant prostate cancer (CRPC). This study aimed to investigate the role of CUX1 in CRPC using clinical samples and in vitro models. CUX1 expression was increased in androgen-independent cells compared to androgen-sensitive cells. The multi-isoform nature of CUX1 makes it difficult to assay in tissue microarrays as there is no epitope able to distinguish the many isoforms for immunohistochemistry. Using surrogate markers, we found no differential expression between castrate resistant and local hormone naïve tissue. However, differences have been demonstrated at the transcript level. In androgen-sensitive cells, migration, but not invasion, increased following CUX1 knockdown. Conversely, in androgen-independent cells, invasion was increased. This observed difference in invasion capacity is not E-cadherin mediated, as CUX1 knockdown increases the expression of E-cadherin in both cell lines with no inter-cell line difference. Cells expressed different ratios of p110/p200 isoforms depending on androgen status and cathepsin L was only detectable in androgen-sensitive cells. MMP3 is upregulated in the androgen-independent cells. Rather than a simple presence or absence of CUX1, the relative balance of CUX1 isoforms and their interplay may be a significant factor in the functional role of CUX1 in CRPC.
Collapse
Affiliation(s)
- Emma R Dorris
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, Ireland
| | - Amanda O'Neill
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, Ireland
| | - Ann Treacy
- Pathology Department, Mater Private Hospital, Dublin, Ireland
| | - Helmut Klocker
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Omri Teltsh
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, Ireland
| | - Elaine Kay
- Department of Pathology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland
| | - R William Watson
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, Ireland
| |
Collapse
|
16
|
Mitschke J, Burk UC, Reinheckel T. The role of proteases in epithelial-to-mesenchymal cell transitions in cancer. Cancer Metastasis Rev 2020; 38:431-444. [PMID: 31482486 DOI: 10.1007/s10555-019-09808-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Changing the characteristics of cells from epithelial states to mesenchymal properties is a key process involved in developmental and physiological processes as well as in many diseases with cancer as the most prominent example. Nowadays, a great deal of work and literature concerns the understanding of the process of epithelial-to-mesenchymal transition (EMT) in terms of its molecular regulation and its implications for cancer. Similar statements can certainly be made regarding the investigation of the more than 500 proteases typically encoded by a mammalian genome. Specifically, the impact of proteases on tumor biology has been a long-standing topic of interest. However, although EMT actively regulates expression of many proteases and proteolytic enzymes are clearly involved in survival, division, differentiation, and movements of cells, information on the diverse roles of proteases in EMT has been rarely compiled. Here we aim to conceptually connect the scientific areas of "EMT" and "protease" research by describing how several important classes of proteolytic enzymes are regulated by EMT and how they are involved in initiation and execution of the EMT program. To do so, we briefly introduce the evolving key features of EMT and its regulation followed by discussion of protease involvement in this process.
Collapse
Affiliation(s)
- Julia Mitschke
- Institute of Molecular Medicine and Cell Research, University of Freiburg, 79104, Freiburg, Germany
| | - Ulrike C Burk
- Institute of Molecular Medicine and Cell Research, University of Freiburg, 79104, Freiburg, Germany
| | - Thomas Reinheckel
- Institute of Molecular Medicine and Cell Research, University of Freiburg, 79104, Freiburg, Germany. .,German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Heidelberg, partner site Freiburg, 79106, Freiburg, Germany. .,BIOSS Centre for Biological Signalling Studies, University of Freiburg, 79104, Freiburg, Germany.
| |
Collapse
|
17
|
Li H, Yang F, Hu A, Wang X, Fang E, Chen Y, Li D, Song H, Wang J, Guo Y, Liu Y, Li H, Huang K, Zheng L, Tong Q. Therapeutic targeting of circ-CUX1/EWSR1/MAZ axis inhibits glycolysis and neuroblastoma progression. EMBO Mol Med 2019; 11:e10835. [PMID: 31709724 PMCID: PMC6895612 DOI: 10.15252/emmm.201910835] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 10/15/2019] [Accepted: 10/18/2019] [Indexed: 12/25/2022] Open
Abstract
Aerobic glycolysis is a hallmark of metabolic reprogramming in tumor progression. However, the mechanisms regulating glycolytic gene expression remain elusive in neuroblastoma (NB), the most common extracranial malignancy in childhood. Herein, we identify that CUT‐like homeobox 1 (CUX1) and CUX1‐generated circular RNA (circ‐CUX1) contribute to aerobic glycolysis and NB progression. Mechanistically, p110 CUX1, a transcription factor generated by proteolytic processing of p200 CUX1, promotes the expression of enolase 1, glucose‐6‐phosphate isomerase, and phosphoglycerate kinase 1, while circ‐CUX1 binds to EWS RNA‐binding protein 1 (EWSR1) to facilitate its interaction with MYC‐associated zinc finger protein (MAZ), resulting in transactivation of MAZ and transcriptional alteration of CUX1 and other genes associated with tumor progression. Administration of an inhibitory peptide blocking circ‐CUX1‐EWSR1 interaction or lentivirus mediating circ‐CUX1 knockdown suppresses aerobic glycolysis, growth, and aggressiveness of NB cells. In clinical NB cases, CUX1 is an independent prognostic factor for unfavorable outcome, and patients with high circ‐CUX1 expression have lower survival probability. These results indicate circ‐CUX1/EWSR1/MAZ axis as a therapeutic target for aerobic glycolysis and NB progression.
Collapse
Affiliation(s)
- Huanhuan Li
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Feng Yang
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Anpei Hu
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Xiaojing Wang
- Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Erhu Fang
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yajun Chen
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Dan Li
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Huajie Song
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Jianqun Wang
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yanhua Guo
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yang Liu
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Hongjun Li
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Kai Huang
- Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Liduan Zheng
- Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.,Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Qiangsong Tong
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.,Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| |
Collapse
|
18
|
Wu X, Feng F, Yang C, Zhang M, Cheng Y, Zhao Y, Wang Y, Che F, Zhang J, Heng X. Upregulated Expression of CUX1 Correlates with Poor Prognosis in Glioma Patients: a Bioinformatic Analysis. J Mol Neurosci 2019; 69:527-537. [PMID: 31377983 DOI: 10.1007/s12031-019-01355-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 03/21/2019] [Indexed: 01/06/2023]
Abstract
Cut-like homeobox-1 (CUX1) is expressed in the upper layer of the cortex and participates in DNA replication, cell cycle control, and DNA repair. It has been shown to be involved in the proliferation of various types of solid tumors. The aims of this study were to explore the relationship between CUX1 expression and the prognosis of glioma by performing a series of functional experiments and bioinformatic analyses. Firstly, we found that CUX1 expression levels differed among patients with different grades of gliomas, and they were significantly correlated with the prognosis of glioma patients according to an analysis of data from a public database. qRT-PCR, western blotting, and immunohistochemical analysis of CUX1 were performed to demonstrate that the expression of CUX1 was positively correlated with the glioma WHO grade (P < 0.05) and several malignant clinical pathological parameters, including Ki67 and P53mut. In addition, the multivariate Cox regression and Kaplan-Meier curves showed that CUX1 expression exerted predictive value for overall survival. Finally, to further investigate the functions of CUX1, we identified CUX1-associated genes and, though GO/KEGG analysis, their associated biological functions and signaling pathways; the results suggested that the activity of CUX1 might be exerted via the JAK-STAT pathway or other key regulators of the cell cycle to promote proliferation, inflammation, and chemotherapy resistance in glioma. Taken together, these results indicate that CUX1 is a potential biomarker of malignancy and prognosis and may serve as a potential therapeutic target for glioma patients.
Collapse
Affiliation(s)
- Xiujie Wu
- Department of Neurosurgery, Linyi People's Hospital, Linyi, 276000, Shandong Province, People's Republic of China
| | - Fan Feng
- Department of Neurosurgery, Qingdao University, Qingdao, 266071, Shandong Province, People's Republic of China
| | - Chuanchao Yang
- Department of Neurosurgery, Weifang Medical University, Weifang, 261042, Shandong Province, People's Republic of China
| | - Moxuan Zhang
- Department of Neurosurgery, Weifang Medical University, Weifang, 261042, Shandong Province, People's Republic of China
| | - Yanhao Cheng
- Department of Neurosurgery, Linyi People's Hospital, Linyi, 276000, Shandong Province, People's Republic of China
| | - Yayun Zhao
- Department of Neurosurgery, Taishan Medical University, Taian, 271000, Shandong Province, People's Republic of China
| | - Yayu Wang
- Department of Neurosurgery, Binzhou Medical University, Binzhou, 256603, Shandong Province, People's Republic of China
| | - Fengyuan Che
- Department of Neurosurgery, Linyi People's Hospital, Linyi, 276000, Shandong Province, People's Republic of China
| | - Jian Zhang
- Department of Neurosurgery, Linyi People's Hospital, Linyi, 276000, Shandong Province, People's Republic of China.
| | - Xueyuan Heng
- Department of Neurosurgery, Linyi People's Hospital, Linyi, 276000, Shandong Province, People's Republic of China.
| |
Collapse
|
19
|
Ma M, Fu Y, Zhou X, Guan F, Wang Y, Li X. Functional roles of fucosylated and O-glycosylated cadherins during carcinogenesis and metastasis. Cell Signal 2019; 63:109365. [PMID: 31352008 DOI: 10.1016/j.cellsig.2019.109365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/24/2019] [Accepted: 07/24/2019] [Indexed: 12/30/2022]
Abstract
Reduced cellular adhesiveness as a result of cadherin dysfunction is a defining feature of cancer and the mechanism involved in many aspects. Glycosylation is one of the most important post-translational modifications to cadherin. Major changes of glycosylation on cadherins can affect its stability, trafficking, and cell-adhesion properties. It has been reported that the different glycoforms of cadherins are promising biomarkers in cancer, with potential clinical application to constitute targets for the development of new therapies. Among the various glycoforms of cadherins, fucosylated and O-glycosylated cadherins are attracting more attention for their important roles in regulating cadherin functions during carcinogenesis. This review will discuss the most recent insights of the functional roles of fucosylated and O-glycosylated cadherins and their regulation mechanisms during carcinogenesis and metastasis. In summary, more understanding of fucosylated and O-glycosylated cadherins will lead to development of novel therapeutic approaches targeted to cancer.
Collapse
Affiliation(s)
- Minxing Ma
- Joint International Research Laboratory of Glycobiology and Medicinal Chemistry, College of Life Sciences, Northwest University, Xi'an, China; Department of Oncology, the Fifth People's Hospital of Qinghai Province, Xining, China
| | - Yutong Fu
- Joint International Research Laboratory of Glycobiology and Medicinal Chemistry, College of Life Sciences, Northwest University, Xi'an, China
| | - Xiaoman Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Feng Guan
- Joint International Research Laboratory of Glycobiology and Medicinal Chemistry, College of Life Sciences, Northwest University, Xi'an, China
| | - Yi Wang
- Department of Hematology, Provincial People's Hospital, Xi'an, China.
| | - Xiang Li
- Joint International Research Laboratory of Glycobiology and Medicinal Chemistry, College of Life Sciences, Northwest University, Xi'an, China; Wuxi School of Medicine, Jiangnan University, Wuxi, China.
| |
Collapse
|
20
|
Burton LJ, Hawsawi O, Sweeney J, Bowen N, Hudson T, Odero-Marah V. CCAAT-displacement protein/cut homeobox transcription factor (CUX1) represses estrogen receptor-alpha (ER-α) in triple-negative breast cancer cells and can be antagonized by muscadine grape skin extract (MSKE). PLoS One 2019; 14:e0214844. [PMID: 30964885 PMCID: PMC6460785 DOI: 10.1371/journal.pone.0214844] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 03/21/2019] [Indexed: 11/18/2022] Open
Abstract
Triple-Negative Breast Cancers (TNBCs) are the most difficult to treat subtype of breast cancer and are often associated with high nuclear expression of Snail and Cathepsin L (Cat L) protease. We have previously shown that Snail can increase Cat L expression/activity in prostate and breast cancer cells. This study investigated the role of CUX1 (a downstream substrate of Cat L) in TNBC. We showed that Cat L and CUX1 were highly expressed in TNBC patient tissue/cell lines, as compared to ER-positive samples, using cBioportal data and western blot/zymography analyses. Additionally, luciferase reporter and chromatin immunoprecipitation assays showed that CUX1 directly bound to estrogen receptor-alpha (ER-α) promoter in MDA-MB-468, a representative TNBC cell line, and that CUX1 siRNA could restore ER-α transcription and protein expression. Furthermore, Snail and CUX1 expression in various TNBC cell lines was inhibited by muscadine grape skin extract (MSKE, a natural grape product rich in anthocyanins) or Cat L inhibitor (Z-FY-CHO) leading to decreased cell invasion and migration. MSKE decreased cell viability and increased expression of apoptotic markers in MDA-MB-468 cells, with no effect on non-tumorigenic MCF10A cells. MSKE also decreased CUX1 binding to ER-α promoter and restored ER-α expression in TNBC cells, while both MSKE and CUX1 siRNA restored sensitivity to estradiol and 4-hydoxytamoxifen as shown by increased cell viability. Therefore, CUX1 activated by Snail-Cat L signaling may contribute to TNBC via ER-α repression, and may be a viable target for TNBC using natural products such as MSKE that targets cancer and not normal cells.
Collapse
Affiliation(s)
- Liza J. Burton
- Center for Cancer Research and Therapeutic Development, Department of
Biological Sciences, Clark Atlanta University, Atlanta, Georgia, United States
of America
| | - Ohuod Hawsawi
- Center for Cancer Research and Therapeutic Development, Department of
Biological Sciences, Clark Atlanta University, Atlanta, Georgia, United States
of America
| | - Janae Sweeney
- Center for Cancer Research and Therapeutic Development, Department of
Biological Sciences, Clark Atlanta University, Atlanta, Georgia, United States
of America
| | - Nathan Bowen
- Center for Cancer Research and Therapeutic Development, Department of
Biological Sciences, Clark Atlanta University, Atlanta, Georgia, United States
of America
| | - Tamaro Hudson
- Department of Medicine, Howard University, Washington, DC, United States
of America
| | - Valerie Odero-Marah
- Center for Cancer Research and Therapeutic Development, Department of
Biological Sciences, Clark Atlanta University, Atlanta, Georgia, United States
of America
| |
Collapse
|
21
|
Jia L, Zhang J, Ma T, Guo Y, Yu Y, Cui J. The Function of Fucosylation in Progression of Lung Cancer. Front Oncol 2018; 8:565. [PMID: 30619732 PMCID: PMC6296341 DOI: 10.3389/fonc.2018.00565] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/12/2018] [Indexed: 12/24/2022] Open
Abstract
Lung cancer is a disease that influences human health and has become a leading cause of cancer mortality worldwide. However, it is frequently diagnosed at the advanced stage. It is necessary by means of biology to identify specific lung tumor biomarkers with high sensitivity. Glycosylation is one of the most important post-translational modifications and is related to many different diseases. It is involved in numerous essential biological processes, such as cell proliferation, differentiation, migration, cell-cell integrity and recognition, and immune modulation. However, little was known about deregulation of glycosylation in lung cancer and contribution to tumor–microenvironment interactions. Among the numerous glycosylations, fucosylation is the most common modification of glycoproteins and glycosylated oligosaccharides. Increased levels of fucosylation have been detected in various pathological conditions, as well as in lung cancer. In this article, we reviewed the role of fucosylation in lung cancer. We highlighted some of the fucosylation alterations currently being pursued in sera or tissues of lung cancer patients. Moreover, we elaborated on the regulation mechanism of fucosylation in proliferative invasion and metastasis of lung tumor cells. In summary, alterations in fucosylation provide potential biomarkers and therapeutic targets in lung cancer.
Collapse
Affiliation(s)
- Liyuan Jia
- Laboratory of Tissue Engineering, College of Life Sciences, Northwest University, Xi'an, China
| | - Jing Zhang
- Laboratory of Tissue Engineering, College of Life Sciences, Northwest University, Xi'an, China
| | - Tianran Ma
- Laboratory for Functional Glycomics, College of Life Sciences, Northwest University, Xi'an, China
| | - Yayuan Guo
- Laboratory of Tissue Engineering, College of Life Sciences, Northwest University, Xi'an, China
| | - Yuan Yu
- Laboratory of Tissue Engineering, College of Life Sciences, Northwest University, Xi'an, China.,Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of Education, Xi'an, China.,Provincial Key Laboratory of Biotechnology of Shaanxi, Xi'an, China
| | - Jihong Cui
- Laboratory of Tissue Engineering, College of Life Sciences, Northwest University, Xi'an, China.,Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of Education, Xi'an, China.,Provincial Key Laboratory of Biotechnology of Shaanxi, Xi'an, China
| |
Collapse
|
22
|
Fei Y, Xiong Y, Shen X, Zhao Y, Zhu Y, Wang L, Liang Z. Cathepsin L promotes ionizing radiation-induced U251 glioma cell migration and invasion through regulating the GSK-3β/CUX1 pathway. Cell Signal 2018; 44:62-71. [DOI: 10.1016/j.cellsig.2018.01.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/20/2017] [Accepted: 01/09/2018] [Indexed: 12/13/2022]
|
23
|
Abstract
Cux1 and Cux2 are the vertebrate members of a family of homeodomain transcription factors (TF) containing Cut repeat DNA-binding sequences. Perturbation of their expression has been implicated in a wide variety of diseases and disorders, ranging from cancer to autism spectrum disorder (ASD). Within the nervous system, both genes are expressed during neurogenesis and in specific neuronal subpopulations. Their role during development and circuit specification is discussed here, with a particular focus on the cortex where their restricted expression in pyramidal neurons of the upper layers appears to be responsible for many of the specialized functions of these cells, and where their functions have been extensively investigated. Finally, we discuss how Cux TF represent a promising avenue for manipulating neuronal function and for reprogramming.
Collapse
|
24
|
Transcription factor CUX1 is required for intestinal epithelial wound healing and targets the VAV2-RAC1 Signalling complex. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:2347-2355. [DOI: 10.1016/j.bbamcr.2017.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 01/02/2023]
|
25
|
Ramdzan ZM, Ginjala V, Pinder JB, Chung D, Donovan CM, Kaur S, Leduy L, Dellaire G, Ganesan S, Nepveu A. The DNA repair function of CUX1 contributes to radioresistance. Oncotarget 2017; 8:19021-19038. [PMID: 28147323 PMCID: PMC5386666 DOI: 10.18632/oncotarget.14875] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 01/19/2017] [Indexed: 01/19/2023] Open
Abstract
Ionizing radiation generates a broad spectrum of oxidative DNA lesions, including oxidized base products, abasic sites, single-strand breaks and double-strand breaks. The CUX1 protein was recently shown to function as an auxiliary factor that stimulates enzymatic activities of OGG1 through its CUT domains. In the present study, we investigated the requirement for CUX1 and OGG1 in the resistance to radiation. Cancer cell survival following ionizing radiation is reduced by CUX1 knockdown and increased by higher CUX1 expression. However, CUX1 knockdown is sufficient by itself to reduce viability in many cancer cell lines that exhibit high levels of reactive oxygen species (ROS). Consequently, clonogenic results expressed relative to that of non-irradiated cells indicate that CUX1 knockdown confers no or modest radiosensitivity to cancer cells with high ROS. A recombinant protein containing only two CUT domains is sufficient for rapid recruitment to DNA damage, acceleration of DNA repair and increased survival following radiation. In agreement with these findings, OGG1 knockdown and treatment of cells with OGG1 inhibitors sensitize cancer cells to radiation. Together, these results validate CUX1 and more specifically the CUT domains as therapeutic targets.
Collapse
Affiliation(s)
- Zubaidah M Ramdzan
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Vasudeva Ginjala
- Department of Medicine, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, New Jersey 08903, USA
| | - Jordan B Pinder
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Dudley Chung
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Caroline M Donovan
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, H3A 1A3, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Simran Kaur
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, H3A 1A3, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Lam Leduy
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Graham Dellaire
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Shridar Ganesan
- Department of Medicine, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, New Jersey 08903, USA
| | - Alain Nepveu
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, H3A 1A3, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec, H3A 1A3, Canada.,Department of Medicine, McGill University, Montreal, Quebec, H3A 1A3, Canada.,Department of Oncology, McGill University, Montreal, Quebec, H3A 1A3, Canada
| |
Collapse
|
26
|
Burton LJ, Henderson V, Liburd L, Odero-Marah VA. Snail transcription factor NLS and importin β1 regulate the subcellular localization of Cathepsin L and Cux1. Biochem Biophys Res Commun 2017; 491:59-64. [PMID: 28698143 PMCID: PMC5568889 DOI: 10.1016/j.bbrc.2017.07.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 07/07/2017] [Indexed: 11/16/2022]
Abstract
Several recent studies have highlighted an additional unexpected localization and site of action for Cathepsin L (Cat L) protease within the nucleus in breast, colon and prostate cancer, however, its role in the nucleus was unclear. It was proposed to mediate proteolytic processing of the transcription factor CCAAT-displacement protein/cut homeobox transcription factor (Cux1) from the full-length p200 isoform to generate the p110 and p90 isoforms, of which the p110 isoform was shown to act as a cell cycle regulator to accelerate entry into the S phase. The p110 isoform has also been shown to bind to the promoter regions of Snail and E-cadherin to activate Snail and inactivate E-cadherin transcription, thus promoting epithelial mesenchymal transition (EMT). Mechanistic studies on what drives Cat L nuclear localization have not been reported. Our hypothesis is that Snail shuttles into the nucleus with Cat L through binding to importin-β. Snail knockdown with siRNA in MDA-MB-468 breast cancer cells led to nuclear to cytoplasmic shuttling of Cat L and decreased levels of Cux1, while overexpression of Snail in MCF-7 breast cancer cells or HEK-293 human embryonic kidney cells led to increased nuclear expression of both Cat L and Cux1. Additionally, transient transfection of Snail NLS mutants not only abrogated Snail nuclear localization but also nuclear localization of Cat L and Cux1. Interestingly, importin β1 knockdown with siRNA decreased Snail and Cux1 levels, as well as nuclear localization of Cat L. Therefore, we show for the first time that the nuclear localization of Cat L and its substrate Cux1can be positively regulated by Snail NLS and importin β1, suggesting that Snail, Cat L and Cux1 all utilize importin β1 for nuclear import.
Collapse
Affiliation(s)
- Liza J Burton
- Center for Cancer Research and Therapeutic Development, Department of Biological Sciences, Clark Atlanta University, Atlanta, GA, USA
| | - Veronica Henderson
- Center for Cancer Research and Therapeutic Development, Department of Biological Sciences, Clark Atlanta University, Atlanta, GA, USA
| | - Latiffa Liburd
- Center for Cancer Research and Therapeutic Development, Department of Biological Sciences, Clark Atlanta University, Atlanta, GA, USA
| | - Valerie A Odero-Marah
- Center for Cancer Research and Therapeutic Development, Department of Biological Sciences, Clark Atlanta University, Atlanta, GA, USA.
| |
Collapse
|
27
|
Targeting the Nuclear Cathepsin L CCAAT Displacement Protein/Cut Homeobox Transcription Factor-Epithelial Mesenchymal Transition Pathway in Prostate and Breast Cancer Cells with the Z-FY-CHO Inhibitor. Mol Cell Biol 2017; 37:MCB.00297-16. [PMID: 27956696 DOI: 10.1128/mcb.00297-16] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 11/28/2016] [Indexed: 01/12/2023] Open
Abstract
The epithelial mesenchymal transition (EMT) promotes tumor migration and invasion by downregulating epithelial markers such as E-cadherin and upregulating mesenchymal markers such as vimentin. Cathepsin L (Cat L) is a cysteine protease that can proteolytically activate CCAAT displacement protein/cut homeobox transcription factor (CUX1). We hypothesized that nuclear Cat L may promote EMT via CUX1 and that this could be antagonized with the Cat L-specific inhibitor Z-FY-CHO. Mesenchymal prostate (ARCaP-M and ARCaP-E overexpressing Snail) and breast (MDA-MB-468, MDA-MB-231, and MCF-7 overexpressing Snail) cancer cells expressed lower E-cadherin activity, higher Snail, vimentin, and Cat L activity, and a p110/p90 active CUX1 form, compared to epithelial prostate (ARCaP-E and ARCaP-Neo) and breast (MCF-7 and MCF-7 Neo) cancer cells. There was increased binding of CUX1 to Snail and the E-cadherin promoter in mesenchymal cells compared to epithelial prostate and breast cells. Treatment of mesenchymal cells with the Cat L inhibitor Z-FY-CHO led to nuclear-to-cytoplasmic relocalization of Cat L, decreased binding of CUX1 to Snail and the E-cadherin promoter, reversed EMT, and decreased cell migration/invasion. Overall, our novel data suggest that a positive feedback loop between Snail-nuclear Cat L-CUX1 drives EMT, which can be antagonized by Z-FY-CHO. Therefore, Z-FY-CHO may be an important therapeutic tool to antagonize EMT and cancer progression.
Collapse
|
28
|
Han ML, Zhao YF, Tan CH, Xiong YJ, Wang WJ, Wu F, Fei Y, Wang L, Liang ZQ. Cathepsin L upregulation-induced EMT phenotype is associated with the acquisition of cisplatin or paclitaxel resistance in A549 cells. Acta Pharmacol Sin 2016; 37:1606-1622. [PMID: 27840408 DOI: 10.1038/aps.2016.93] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 07/13/2016] [Indexed: 12/22/2022] Open
Abstract
AIM Cathepsin L (CTSL), a lysosomal acid cysteine protease, is known to play important roles in tumor metastasis and chemotherapy resistance. In this study we investigated the molecular mechanisms underlying the regulation of chemoresistance by CTSL in human lung cancer cells. METHODS Human lung cancer A549 cells, A549/PTX (paclitaxel-resistant) cells and A549/DDP (cisplatin-resistant) cells were tested. The resistance to cisplatin or paclitaxel was detected using MTT and the colony-formation assays. Actin remodeling was observed with FITC-Phalloidin fluorescent staining or immunofluorescence. A wound-healing assay or Transwell assay was used to assess the migration or invasion ability. The expression of CTSL and epithelial and mesenchymal markers was analyzed with Western blotting and immunofluorescence. The expression of EMT-associated transcription factors was measured with Western blotting or q-PCR. BALB/c nude mice were implanted subcutaneously with A549 cells overexpressing CTSL, and the mice were administered paclitaxel (10, 15 mg/kg, ip) every 3 d for 5 times. RESULTS Cisplatin or paclitaxel treatment (10-80 ng/mL) induced CTSL expression in A549 cells. CTSL levels were much higher in A549/PTX and A549/DDP cells than in A549 cells. Silencing of CTSL reversed the chemoresistance in A549/DDP and A549/TAX cells, whereas overexpression of CTSL attenuated the sensitivity of A549 cells to cisplatin or paclitaxel. Furthermore, A549/DDP and A549/TAX cells underwent morphological and cytoskeletal changes with increased cell invasion and migration abilities, accompanied by decreased expression of epithelial markers (E-cadherin and cytokeratin-18) and increased expression of mesenchymal markers (N-cadherin and vimentin), as well as upregulation of EMT-associated transcription factors Snail, Slug, ZEB1 and ZEB2. Silencing of CTSL reversed EMT in A549/DDP and A549/TAX cells; In contrast, overexpression of CTSL induced EMT in A549 cells. In xenograft nude mouse model, the mice implanted with A549 cells overexpressing CTSL exhibited significantly reduced sensitivity to paclitaxel treatment, and increased expression of EMT-associated proteins and transcription factors in tumor tissues. CONCLUSION Cisplatin and paclitaxel resistance is associated with CTSL upregulation-induced EMT in A549 cells. Thus, CTSL-mediated EMT may be exploited as a target to enhance the efficacy of cisplatin or paclitaxel against lung cancer and other types of malignancies.
Collapse
|
29
|
Shao K, Chen ZY, Gautam S, Deng NH, Zhou Y, Wu XZ. Posttranslational modification of E-cadherin by core fucosylation regulates Src activation and induces epithelial–mesenchymal transition-like process in lung cancer cells. Glycobiology 2016; 26:142-154. [DOI: 10.1093/glycob/cwv089] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
|
30
|
Sudhan DR, Siemann DW. Cathepsin L targeting in cancer treatment. Pharmacol Ther 2015; 155:105-16. [PMID: 26299995 DOI: 10.1016/j.pharmthera.2015.08.007] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/17/2015] [Indexed: 12/14/2022]
Abstract
Proteolytic enzymes may serve as promising targets for novel therapeutic treatment strategies seeking to impede cancer progression and metastasis. One such enzyme is cathepsin L (CTSL), a lysosomal cysteine protease. CTSL upregulation, a common occurrence in a variety of human cancers, has been widely correlated with metastatic aggressiveness and poor patient prognosis. In addition, CTSL has been implicated to contribute to cancer-associated osteolysis, a debilitating morbidity affecting both life expectancy and the quality of life. In this review, we highlight the mechanisms by which CTSL contributes to tumor progression and dissemination and discuss the therapeutic utility of CTSL intervention strategies aimed at impeding metastatic progression and bone resorption.
Collapse
Affiliation(s)
- Dhivya R Sudhan
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Dietmar W Siemann
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA; Department of Pharmacology and Therapeutics, College of Medicine, University of Florida, Gainesville, FL, USA.
| |
Collapse
|
31
|
Donovan SM, Monaco MH, Drnevich J, Kvistgaard AS, Hernell O, Lönnerdal B. Bovine osteopontin modifies the intestinal transcriptome of formula-fed infant rhesus monkeys to be more similar to those that were breastfed. J Nutr 2014; 144:1910-9. [PMID: 25320184 DOI: 10.3945/jn.114.197558] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Osteopontin (OPN) is a multifunctional protein found in human milk at high concentration. OBJECTIVE The impact of supplemental bovine OPN on growth, body composition, and the jejunal transcriptome was assessed. METHODS Newborn rhesus monkeys were randomly assigned to be breastfed (n = 4) or to receive formula [formula fed (FF), n = 6] or formula supplemented with 125 mg/L of bovine OPN (bOPN, n = 6) for 3 mo. Jejunal mRNA was extracted and subjected to microarray analysis. RESULTS Growth was similar among all the treatment groups, but breastfed monkeys were ∼25% leaner at 3 mo. Pairwise comparisons demonstrated that 1017 genes were differentially expressed between breastfed and FF groups, 217 between breastfed and bOPN groups, and 119 between FF and bOPN groups. The data were also analyzed with the use of weighted gene coexpression network analysis, which revealed 6 modules of coexpressed genes that differed among the 3 treatments. Nearly 50% of genes were assigned to one module in which breastfed differed from FF and bOPN expression was intermediate. This module was enriched for genes related to cell adhesion and motility, cytoskeletal remodeling, wingless and integration site signaling, and neuronal development. Most of these canonical pathways centered on integrins, which are receptors for OPN. CONCLUSIONS The intestinal transcriptome of breastfed and FF monkeys differs, but bovine OPN at levels similar to human milk shifts gene expression profiles to be more similar to breastfed monkeys.
Collapse
Affiliation(s)
| | | | - Jenny Drnevich
- High Performance Biological Computing Group and the Carver Biotechnology Center, University of Illinois, Urbana, IL
| | | | - Olle Hernell
- Department of Clinical Sciences, University of Umea, Umea, Sweden; and
| | - Bo Lönnerdal
- Department of Nutrition, University of California, Davis, CA
| |
Collapse
|
32
|
Ramdzan ZM, Nepveu A. CUX1, a haploinsufficient tumour suppressor gene overexpressed in advanced cancers. Nat Rev Cancer 2014; 14:673-82. [PMID: 25190083 DOI: 10.1038/nrc3805] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
CUT-like homeobox 1 (CUX1) is a homeobox gene that is implicated in both tumour suppression and progression. The accumulated evidence supports a model of haploinsufficiency whereby reduced CUX1 expression promotes tumour development. Paradoxically, increased CUX1 expression is associated with tumour progression, and ectopic CUX1 expression in transgenic mice increases tumour burden in several tissues. One CUX1 isoform functions as an ancillary factor in base excision repair and the other CUX1 isoforms act as transcriptional activators or repressors. Several transcriptional targets and cellular functions of CUX1 affect tumorigenesis; however, we have yet to develop a mechanistic framework to reconcile the opposite roles of CUX1 in cancer protection and progression.
Collapse
Affiliation(s)
- Zubaidah M Ramdzan
- Goodman Cancer Centre, McGill University, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada
| | - Alain Nepveu
- 1] Goodman Cancer Centre, McGill University, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada. [2] Department of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada. [3] Department of Medicine, McGill University, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada. [4] Department of Oncology, McGill University, 1160 Pine Avenue West, Montreal, Quebec, H3A 1A3, Canada
| |
Collapse
|
33
|
Vadnais C, Shooshtarizadeh P, Rajadurai CV, Lesurf R, Hulea L, Davoudi S, Cadieux C, Hallett M, Park M, Nepveu A. Autocrine Activation of the Wnt/β-Catenin Pathway by CUX1 and GLIS1 in Breast Cancers. Biol Open 2014; 3:937-46. [PMID: 25217618 PMCID: PMC4197442 DOI: 10.1242/bio.20148193] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Autocrine activation of the Wnt/β-catenin pathway occurs in several cancers, notably in breast tumors, and is associated with higher expression of various Wnt ligands. Using various inhibitors of the FZD/LRP receptor complex, we demonstrate that some adenosquamous carcinomas that develop in MMTV-CUX1 transgenic mice represent a model for autocrine activation of the Wnt/β-catenin pathway. By comparing expression profiles of laser-capture microdissected mammary tumors, we identify Glis1 as a transcription factor that is highly expressed in the subset of tumors with elevated Wnt gene expression. Analysis of human cancer datasets confirms that elevated WNT gene expression is associated with high levels of CUX1 and GLIS1 and correlates with genes of the epithelial-to-mesenchymal transition (EMT) signature: VIM, SNAI1 and TWIST1 are elevated whereas CDH1 and OCLN are decreased. Co-expression experiments demonstrate that CUX1 and GLIS1 cooperate to stimulate TCF/β-catenin transcriptional activity and to enhance cell migration and invasion. Altogether, these results provide additional evidence for the role of GLIS1 in reprogramming gene expression and suggest a hierarchical model for transcriptional regulation of the Wnt/β-catenin pathway and the epithelial-to-mesenchymal transition.
Collapse
Affiliation(s)
- Charles Vadnais
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | | | - Charles V Rajadurai
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Robert Lesurf
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada McGill Centre for Bioinformatics, McGill University, Montreal, QC H3G 0B1, Canada
| | - Laura Hulea
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Sayeh Davoudi
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada
| | - Chantal Cadieux
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Michael Hallett
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada McGill Centre for Bioinformatics, McGill University, Montreal, QC H3G 0B1, Canada
| | - Morag Park
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada Department of Medicine, McGill University, Montreal, QC H3A 1A1, Canada Department of Oncology, McGill University, Montreal, QC H2W 1S6, Canada
| | - Alain Nepveu
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada Department of Medicine, McGill University, Montreal, QC H3A 1A1, Canada Department of Oncology, McGill University, Montreal, QC H2W 1S6, Canada
| |
Collapse
|
34
|
Ramdzan ZM, Vadnais C, Pal R, Vandal G, Cadieux C, Leduy L, Davoudi S, Hulea L, Yao L, Karnezis AN, Paquet M, Dankort D, Nepveu A. RAS transformation requires CUX1-dependent repair of oxidative DNA damage. PLoS Biol 2014; 12:e1001807. [PMID: 24618719 PMCID: PMC3949673 DOI: 10.1371/journal.pbio.1001807] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 01/29/2014] [Indexed: 01/19/2023] Open
Abstract
The base excision repair (BER) that repairs oxidative damage is upregulated as an adaptive response in maintaining tumorigenesis of RAS-transformed cancer cells. The Cut homeobox 1 (CUX1) gene is a target of loss-of-heterozygosity in many cancers, yet elevated CUX1 expression is frequently observed and is associated with shorter disease-free survival. The dual role of CUX1 in cancer is illustrated by the fact that most cell lines with CUX1 LOH display amplification of the remaining allele, suggesting that decreased CUX1 expression facilitates tumor development while increased CUX1 expression is needed in tumorigenic cells. Indeed, CUX1 was found in a genome-wide RNAi screen to identify synthetic lethal interactions with oncogenic RAS. Here we show that CUX1 functions in base excision repair as an ancillary factor for the 8-oxoG-DNA glycosylase, OGG1. Single cell gel electrophoresis (comet assay) reveals that Cux1+/− MEFs are haploinsufficient for the repair of oxidative DNA damage, whereas elevated CUX1 levels accelerate DNA repair. In vitro base excision repair assays with purified components demonstrate that CUX1 directly stimulates OGG1's enzymatic activity. Elevated reactive oxygen species (ROS) levels in cells with sustained RAS pathway activation can cause cellular senescence. We show that elevated expression of either CUX1 or OGG1 prevents RAS-induced senescence in primary cells, and that CUX1 knockdown is synthetic lethal with oncogenic RAS in human cancer cells. Elevated CUX1 expression in a transgenic mouse model enables the emergence of mammary tumors with spontaneous activating Kras mutations. We confirmed cooperation between KrasG12V and CUX1 in a lung tumor model. Cancer cells can overcome the antiproliferative effects of excessive DNA damage by inactivating a DNA damage response pathway such as ATM or p53 signaling. Our findings reveal an alternate mechanism to allow sustained proliferation in RAS-transformed cells through increased DNA base excision repair capability. The heightened dependency of RAS-transformed cells on base excision repair may provide a therapeutic window that could be exploited with drugs that specifically target this pathway. In the context of tumor development and progression, mutations are believed to accumulate owing to compromised DNA repair. Such mutations promote oncogenic growth. Yet cancer cells also need to sustain a certain level of DNA repair in order to replicate their DNA and successfully proliferate. Here we show that cancer cells that harbor an activated RAS oncogene exhibit heightened DNA repair capability, specifically in the base excision repair (BER) pathway that repairs oxidative DNA damage. RAS oncogenes alone do not transform primary cells but rather cause their senescence—that is, they stop dividing. As such, cellular senescence in this context is proposed to function as a tumor-suppressive mechanism. We show that CUX1, a protein that accelerates oxidative DNA damage repair, prevents cells from senescing and enables proliferation in the presence of a RAS oncogene. Consistent with this, RAS-induced senescence is also prevented by ectopic expression of OGG1, the DNA glycosylase that removes 8-oxoguanine, the most abundant oxidized base. Strikingly, CUX1 expression in transgenic mice enables the emergence of tumors with spontaneous activating Kras mutations. Conversely, knockdown of CUX1 is synthetic lethal for RAS-transformed cells, thereby revealing a potential Achilles' heel of these cancer cells. Overall, the work provides insight into understanding the role of DNA repair in cancer progression, showing that while DNA damage-induced mutations promote tumorigenesis, sustained RAS-dependent tumorigenesis requires suppression of DNA damage. The heightened dependency of RAS-transformed cells on base excision repair may provide a therapeutic window that could be exploited with drugs that specifically target this pathway.
Collapse
Affiliation(s)
| | - Charles Vadnais
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Ranjana Pal
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
| | - Guillaume Vandal
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biology, McGill University, Montreal, Quebec, Canada
| | - Chantal Cadieux
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Lam Leduy
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
| | - Sayeh Davoudi
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Laura Hulea
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Lu Yao
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Anthony N. Karnezis
- BC Cancer Agency, Centre for Translational and Applied Genomics, Vancouver, British Columbia, Canada
| | - Marilène Paquet
- Département de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, Quebec, Canada
| | - David Dankort
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biology, McGill University, Montreal, Quebec, Canada
- * E-mail: (D.D.); (A.N.)
| | - Alain Nepveu
- Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Department of Medicine, McGill University, Montreal, Quebec, Canada
- Department of Oncology McGill University, Montreal, Quebec, Canada
- * E-mail: (D.D.); (A.N.)
| |
Collapse
|
35
|
Kühnemuth B, Mühlberg L, Schipper M, Griesmann H, Neesse A, Milosevic N, Wissniowski T, Buchholz M, Gress TM, Michl P. CUX1 modulates polarization of tumor-associated macrophages by antagonizing NF-κB signaling. Oncogene 2013; 34:177-87. [DOI: 10.1038/onc.2013.530] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 10/12/2013] [Accepted: 11/08/2013] [Indexed: 01/19/2023]
|
36
|
Vadnais C, Awan AA, Harada R, Clermont PL, Leduy L, Bérubé G, Nepveu A. Long-range transcriptional regulation by the p110 CUX1 homeodomain protein on the ENCODE array. BMC Genomics 2013; 14:258. [PMID: 23590133 PMCID: PMC3770232 DOI: 10.1186/1471-2164-14-258] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 03/26/2013] [Indexed: 01/19/2023] Open
Abstract
Background Overexpression of the Cut homeobox 1 gene, CUX1, inversely
correlates with patient survival in breast cancers. Cell-based assays and
molecular studies have revealed that transcriptional regulation by
CUX1 involves mostly the proteolytically processed p110
isoform. As there is no antibody specific to p110 CUX1 only, an alternate
strategy must be employed to identify its targets. Results We expressed physiological levels of a tagged-p110 CUX1 protein and performed
chromatin affinity purification followed by hybridization on ENCODE and
promoter arrays. Targets were validated by chromatin immunoprecipitation and
transcriptional regulation by CUX1 was analyzed in expression profiling and
RT-qPCR assays following CUX1 knockdown or p110 CUX1 overexpression.
Approximately 47% and 14% of CUX1 binding sites were respectively mapped
less than 4 Kbp, or more than 40 Kbp, away from a transcription start site.
More genes exhibited changes in expression following CUX1 knockdown than
p110 CUX1 overexpression. CUX1 directly activated or repressed 7.4% and 8.4%
of putative targets identified on the ENCODE and promoter arrays
respectively. This proportion increased to 11.2% for targets with 2 binding
sites or more. Transcriptional repression was observed in a slightly higher
proportion of target genes. The CUX1 consensus binding motif, ATCRAT, was
found at 47.2% of the CUX1 binding sites, yet only 8.3% of the CUX1
consensus motifs present on the array were bound in vivo. The
presence of a consensus binding motif did not have an impact on whether a
target gene was repressed or activated. Interestingly, the distance between
a binding site and a transcription start site did not significantly reduced
the ability of CUX1 to regulate a target gene. Moreover, CUX1 not only was
able to regulate the next adjacent gene, but also regulated the gene located
beyond this one as well as the gene located further away in the opposite
direction. Conclusion Our results demonstrate that p110 CUX1 can activate or repress transcription
when bound at a distance and can regulate more than one gene on certain
genomic loci.
Collapse
Affiliation(s)
- Charles Vadnais
- Goodman Cancer Centre, McGill University, 1160 Pine avenue West, Montreal, Quebec H3A 1A3, Canada
| | | | | | | | | | | | | |
Collapse
|
37
|
Liu KC, Lin BS, Zhao M, Wang KY, Lan XP. Cutl1: a potential target for cancer therapy. Cell Signal 2012; 25:349-54. [PMID: 23085261 DOI: 10.1016/j.cellsig.2012.10.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 10/12/2012] [Accepted: 10/12/2012] [Indexed: 01/19/2023]
Abstract
CDP, a key transcription regulator encoded by Cutl1 gene, has been demonstrated to be involved in repressing or promoting expression of target genes through its specific DNA-binding, meanwhile, the activity of CDP was influenced by some types of modifications including transcriptional, posttranscriptional, translational and posttranslational modifications. In this review, we systematically analyzed the role of CDP in normal development and tumor progression, and then emphasized its interactors and downstream molecules. Eventually, we concluded that Cut1 could promote cancer progression and its down-regulating expression will be a promising strategy for cancer therapy.
Collapse
Affiliation(s)
- Kuan-can Liu
- Institute for Laboratory Medicine, Fuzhou General Hospital, PLA, Fuzhou, Fujian 350025, PR China
| | | | | | | | | |
Collapse
|
38
|
Vadnais C, Davoudi S, Afshin M, Harada R, Dudley R, Clermont PL, Drobetsky E, Nepveu A. CUX1 transcription factor is required for optimal ATM/ATR-mediated responses to DNA damage. Nucleic Acids Res 2012; 40:4483-95. [PMID: 22319212 PMCID: PMC3378881 DOI: 10.1093/nar/gks041] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The p110 Cut homeobox 1 (CUX1) transcription factor regulates genes involved in DNA replication and chromosome segregation. Using a genome-wide-approach, we now demonstrate that CUX1 also modulates the constitutive expression of DNA damage response genes, including ones encoding ATM and ATR, as well as proteins involved in DNA damage-induced activation of, and signaling through, these kinases. Consistently, RNAi knockdown or genetic inactivation of CUX1 reduced ATM/ATR expression and negatively impacted hallmark protective responses mediated by ATM and ATR following exposure to ionizing radiation (IR) and UV, respectively. Specifically, abrogation of CUX1 strongly reduced ATM autophosphorylation after IR, in turn causing substantial decreases in (i) levels of phospho-Chk2 and p53, (ii) γ-H2AX and Rad51 DNA damage foci and (iii) the efficiency of DNA strand break repair. Similarly remarkable reductions in ATR-dependent responses, including phosphorylation of Chk1 and H2AX, were observed post-UV. Finally, multiple cell cycle checkpoints and clonogenic survival were compromised in CUX1 knockdown cells. Our results indicate that CUX1 regulates a transcriptional program that is necessary to mount an efficient response to mutagenic insult. Thus, CUX1 ensures not only the proper duplication and segregation of the genetic material, but also the preservation of its integrity.
Collapse
Affiliation(s)
- Charles Vadnais
- Goodman Cancer Centre, Department of Biochemistry, McGill University, 1160 Pine avenue West, Montreal, Quebec, Canada, H3A 1A3
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Hulea L, Nepveu A. CUX1 transcription factors: from biochemical activities and cell-based assays to mouse models and human diseases. Gene 2012; 497:18-26. [PMID: 22306263 DOI: 10.1016/j.gene.2012.01.039] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 01/09/2012] [Accepted: 01/18/2012] [Indexed: 01/19/2023]
Abstract
ChIP-chip and expression analyses indicated that CUX1 transcription factors regulate a large number of genes and microRNAs involved in multiple cellular processes. Indeed, in proliferating cells CUX1 was shown to regulate several genes involved in DNA replication, progression into S phase and later, the spindle assembly checkpoint that controls progression through mitosis. siRNA-mediated knockdown established that CUX1 is required for cell motility. Moreover, higher expression of short CUX1 isoforms, as observed in many cancers, was shown to stimulate cell migration and invasion. In parallel, elevated expression particularly in higher grade tumors of breast and pancreatic cancers implicated CUX1 in tumor initiation and progression. Indeed, transgenic mouse models demonstrated a causal role of CUX1 in cancers originating from various cell types. These studies revealed that higher CUX1 expression or activity not only stimulates cell proliferation and motility, but also promotes genetic instability. CUX1 has also been implicated in the etiology of polycystic kidney diseases, both from a transgenic approach and the analysis of CUX1 activity in multiple mouse models of this disease. Studies in neurobiology have uncovered a potential implication of CUX1 in cognitive disorders, neurodegeneration and obesity. CUX1 was shown to be expressed specifically in pyramidal neurons of the neocortex upper layers where it regulates dendrite branching, spine development, and synapse formation. In addition, modulation of CUX1 expression in neurons of the hypothalamus has been associated with changes in leptin receptor trafficking in the vicinity of the primary cilium resulting in altered leptin signaling and ultimately, eating behavior. Overall, studies in various fields have allowed the development of several cell-based assays to monitor CUX1 function and have extended the range of organs in which CUX1 plays an important role in development and tissue homeostasis.
Collapse
Affiliation(s)
- Laura Hulea
- Goodman Cancer Centre, McGill University, 1160 Pine avenue West, Montreal, Quebec, Canada H3A 1A3
| | | |
Collapse
|
40
|
Sansregret L, Nepveu A. Gene signatures of genomic instability as prognostic tools for breast cancer. Future Oncol 2011; 7:591-4. [PMID: 21568672 DOI: 10.2217/fon.11.34] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
|
41
|
Miller LK, Devi LA. The highs and lows of cannabinoid receptor expression in disease: mechanisms and their therapeutic implications. Pharmacol Rev 2011; 63:461-70. [PMID: 21752875 DOI: 10.1124/pr.110.003491] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Alterations in the endogenous cannabinoid system have been described in almost every category of disease. These changes can alternatively be protective or maladaptive, such as producing antinociception in neuropathic pain or fibrogenesis in liver disease, making the system an attractive therapeutic target. However, the challenge remains to selectively target the site of disease while sparing other areas, particularly mood and cognitive centers of the brain. Identifying regional changes in cannabinoid receptor-1 and -2 (CB(1)R and CB(2)R) expression is particularly important when considering endocannabinoid system-based therapies, because regional increases in cannabinoid receptor expression have been shown to increase potency and efficacy of exogenous agonists at sites of disease. Although there have been extensive descriptive studies of cannabinoid receptor expression changes in disease, the underlying mechanisms are only just beginning to unfold. Understanding these mechanisms is important and potentially relevant to therapeutics. In diseases for which cannabinoid receptors are protective, knowledge of the mechanisms of receptor up-regulation could be used to design therapies to regionally increase receptor expression and thus increase efficacy of an agonist. Alternatively, inhibition of harmful cannabinoid up-regulation could be an attractive alternative to global antagonism of the system. Here we review current findings on the mechanisms of cannabinoid receptor regulation in disease and discuss their therapeutic implications.
Collapse
Affiliation(s)
- Lydia K Miller
- Department of Pharmacology and Systems Therapeutics, Box 1603, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USA
| | | |
Collapse
|
42
|
Soumiya H, Fukumitsu H, Furukawa S. Prenatal immune challenge compromises the normal course of neurogenesis during development of the mouse cerebral cortex. J Neurosci Res 2011; 89:1575-85. [PMID: 21732402 DOI: 10.1002/jnr.22704] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/06/2011] [Accepted: 05/06/2011] [Indexed: 01/13/2023]
Abstract
Maternal infection during pregnancy is an environmental risk factor for the development of severe brain disorders in offspring, including schizophrenia and autism. However, little is known about the neurodevelopmental mechanisms underlying the association between prenatal exposure to infection and the emergence of cognitive and behavioral dysfunctions in later life. By injecting viral mimetic polyriboinosinic-polyribocytidylic acid (Poly I:C) into mice, we investigated the influence of maternal immune challenge during pregnancy on the development of the cerebral cortex of offspring. Our previous study showed that stimulation of the maternal immune system compromised the expression properties of transcription factors and the synaptogenesis of cortical neurons in upper layers but not those in deeper layers. The objective of the current study was to examine further whether maternal immune challenge has an influence on the cellular-biological features of the cortical progenitors that generate distinct cortical neuronal subtypes. We found the following abnormalities in the cortex of mice given the prenatal Poly I:C injection during later stages of cortical neurogenesis. First, proliferative activity and the expression of Pax6, which is a master regulator of the gene expression of transcription factors, were significantly decreased in the cortical progenitors. Second, the laminar allocation and gene expression were significantly altered in the daughter neurons generated at the same birth dates. These results demonstrate that specific abnormalities in the cortical progenitors preceded deficits in neuronal phenotypes. These changes may underlie the emergence of psychiatric brain and behavioral dysfunctions after in utero exposure to an infection.
Collapse
Affiliation(s)
- Hitomi Soumiya
- Laboratory of Molecular Biology, Department of Biofunctional Analysis, Gifu Pharmaceutical University, Gifu, Japan
| | | | | |
Collapse
|
43
|
Soumiya H, Fukumitsu H, Furukawa S. Prenatal immune challenge compromises development of upper-layer but not deeper-layer neurons of the mouse cerebral cortex. J Neurosci Res 2011; 89:1342-50. [DOI: 10.1002/jnr.22636] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 02/01/2011] [Accepted: 02/02/2011] [Indexed: 11/07/2022]
|
44
|
Kojima K, Takata A, Vadnais C, Otsuka M, Yoshikawa T, Akanuma M, Kondo Y, Kang YJ, Kishikawa T, Kato N, Xie Z, Zhang WJ, Yoshida H, Omata M, Nepveu A, Koike K. MicroRNA122 is a key regulator of α-fetoprotein expression and influences the aggressiveness of hepatocellular carcinoma. Nat Commun 2011; 2:338. [PMID: 21654638 DOI: 10.1038/ncomms1345] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Accepted: 05/11/2011] [Indexed: 12/18/2022] Open
Abstract
α-fetoprotein (AFP) is not only a widely used biomarker in hepatocellular carcinoma (HCC) surveillance, but is also clinically recognized as linked with aggressive tumour behaviour. Here we show that deregulation of microRNA122, a liver-specific microRNA, is a cause of both AFP elevation and a more biologically aggressive phenotype in HCC. We identify CUX1, a direct target of microRNA122, as a common central mediator of these two effects. Using liver tissues from transgenic mice in which microRNA122 is functionally silenced, an orthotopic xenograft tumour model, and human clinical samples, we further demonstrate that a microRNA122/CUX1/microRNA214/ZBTB20 pathway regulates AFP expression. We also show that the microRNA122/CUX1/RhoA pathway regulates the aggressive characteristics of tumours. We conclude that microRNA122 and associated signalling proteins may represent viable therapeutic targets, and that serum AFP levels in HCC patients may be a surrogate marker for deregulated intracellular microRNA122 signalling pathways in HCC tissues.
Collapse
Affiliation(s)
- Kentaro Kojima
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Glutamate receptor GRIA3--target of CUX1 and mediator of tumor progression in pancreatic cancer. Neoplasia 2010; 12:659-67. [PMID: 20689760 DOI: 10.1593/neo.10486] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 05/24/2010] [Accepted: 05/27/2010] [Indexed: 02/07/2023] Open
Abstract
Previously, we identified the transcription factor CUX1 as an important modulator of invasion and resistance to apoptosis. Expression profiles suggested that CUX1 regulates a complex transcriptional program mediating tumor progression. We aimed to identify functionally relevant targets of CUX1 by using RNA interference (RNAi)-based loss-of-function screens. Therefore, we generated an RNAi library containing putative transcriptional targets of CUX1 identified by microarrays and performed cell viability screens. Using this approach, several CUX1 targets with effect on tumor cell viability were identified, including the glutamate receptor GRIA3, which was validated in detail for its effects on proliferation, apoptosis, and cell migration using RNAi knock-down and overexpression strategies in vitro, as well as xenograft models in vivo. The expression of GRIA3 was evaluated in human pancreatic cancer tissues. We found that knock-down of GRIA3 significantly reduced proliferation and migration and enhanced apoptosis. In contrast, overexpression of GRIA3 significantly reduced apoptosis and enhanced both proliferation and tumor cell migration. GRIA3 could be confirmed as a downstream effector of CUX1 and was expressed in pancreatic cancer tissues. In vivo, GRIA3 significantly enhanced the growth of subcutaneous xenografts. Inhibitors of glutamate receptors such as GYKI52466 and SYM2206 significantly decreased survival of pancreatic cancer cells, suggesting the presence of glutamate signaling in pancreatic cancer. In conclusion, GRIA3 plays a role as a mediator of tumor progression in pancreatic cancer downstream CUX1. To our knowledge, this is the first report to identify a glutamate receptor as a modulator of tumor progression in a solid cancer outside the brain.
Collapse
|
46
|
Kroll MR, Viss ES, Lamb J, Horstman J, Powell A, Van Wyk A, Hinkkala K, Hoogland T, Schippers M, Shannon S, Carlton CG, Sharma M, Taylor A, Vanden Heuvel GB, Jelsma TN. Asynchronous expression of the homeodomain protein CUX1 in Sertoli cells and spermatids during spermatogenesis in mice. Biol Reprod 2010; 84:455-65. [PMID: 20980687 DOI: 10.1095/biolreprod.110.084335] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The homeodomain CUX1 protein exists as multiple isoforms that arise from proteolytic processing of a 200-kDa protein or an alternate splicing or from the use of an alternate promoter. The 200-kDa CUX1 protein is highly expressed in the developing kidney, where it functions to regulate cell proliferation. Transgenic mice ectopically expressing the 200-kDa CUX1 protein develop renal hyperplasia associated with reduced expression of the cyclin kinase inhibitor p27. A 55-kDa CUX1 isoform is expressed exclusively in the testes. We determined the pattern and timing of CUX1 protein expression in developing testes. CUX1 expression was continuous in Sertoli cells from prepubertal testes but became cyclic when spermatids appeared. In testes from mature mice, CUX1 was highly expressed only in round spermatids at stages IV-V of spermatogenesis, in both spermatids and Sertoli cells at stages VI-X of spermatogenesis, and only in Sertoli cells at stage XI of spermatogenesis. While most of the seminiferous tubules in wild-type mice were between stages VI and X of spermatogenesis, there was a significant reduction in the percentage of seminiferous tubules between stages VI and X in Cux1 transgenic mice and a significant increase in the percentage of seminiferous tubules in stages IV-V and XI. Moreover, CUX1 was not expressed in proliferating cells in testes from either wild-type or transgenic mice. Thus, unlike the somatic form of CUX1, which has a role in cell proliferation, the testis-specific form of CUX1 is not involved in cell division and appears to play a role in signaling between Sertoli cells and spermatids.
Collapse
Affiliation(s)
- Melissa R Kroll
- Department of Biology, Dordt College, Sioux Center, Iowa, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Darsigny M, St-Jean S, Boudreau F. Cux1 transcription factor is induced in inflammatory bowel disease and protects against experimental colitis. Inflamm Bowel Dis 2010; 16:1739-50. [PMID: 20848487 DOI: 10.1002/ibd.21274] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Cux1 is a ubiquitous transcriptional factor that has been associated with cell proliferation, migration, invasion, and differentiation. Cux1 is an effector of the transforming growth factor beta (TGFβ) pathway, PAR(2) receptor signaling, and cellular migration, mechanisms intimately related to inflammatory bowel diseases (IBD). METHODS CD1 mice treated with dextran sulfate sodium (DSS) in drinking water and cultured intestinal epithelial cells were used to determine Cux1 expression under inflammatory conditions. A commercial cDNA library was used to monitor CUX1 expression in IBD patients. The Cux1(ΔHD/ΔHD) hypomorphic mouse model (Cux1ΔHD) treated with DSS in drinking water was used and the disease severity assessed. RESULTS Cux1 expression increased in cultured intestinal epithelial cells stimulated with tumor necrosis factor alpha (TNFα), in the mouse intestinal epithelium during experimental colitis and in human IBD patient samples. DSS-induced colitis in Cux1ΔHD mice was more severe according to clinical observations such as weight loss, colon length, and rectal bleeding. Histological observations confirmed an increase of IBD-related morphological changes including ulceration and mucosal infiltration of leukocytes in Cux1ΔHD mice. An increased number of pSer(276)-RelA-positive cells and higher expression levels of proinflammatory cytokines were also measured in the colon of Cux1ΔHD diseased animals. Elevated levels of Cxcl1 were measured before and after DSS-treatment and a greater neutrophilic infiltration was quantified in DSS-treated Cux1ΔHD mice. Finally, mucosal healing was significantly impaired in Cux1ΔHD mice during recovery from DSS treatment. CONCLUSIONS CUX1 is increased in response to inflammatory stress and its nuclear expression is crucial to protect against DSS-induced colitis and subsequent mucosal healing.
Collapse
Affiliation(s)
- Mathieu Darsigny
- Département d'Anatomie et Biologie Cellulaire, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | | | | |
Collapse
|
48
|
Kedinger V, Nepveu A. The roles of CUX1 homeodomain proteins in the establishment of a transcriptional program required for cell migration and invasion. Cell Adh Migr 2010; 4:348-52. [PMID: 20224295 DOI: 10.4161/cam.4.3.11407] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The Cut homeobox gene 1 (CUX1) codes for several homeodomain proteins that display distinct DNA binding and transcriptional properties. Some CUX1 isoforms were previously shown to stimulate entry into S phase. More recently, siRNA-mediated knockdown of CUX1 was shown to cause a decrease in cell migration and invasion. In contrast, ectopic expression of p110 or p75 CUX1 stimulated cell migration and invasion in tissue culture. Moreover, metastasis to the lung was observed in a few cases following development of mammary tumors in p75 CUX1 transgenic mice. Chromatin immunoprecipitation (ChIP) assays followed by hybridization on promoter arrays (ChIP-chip) led to the identification of more than 20 genes that are directly regulated by CUX1 and code for proteins involved in cytoskeleton remodeling, cell-cell and cell-matrix adhesion, epithelial to mesenchymal transition and transcriptional regulation. Many targets of CUX1 are regulators of Rho GTPases that play a role both in cell cycle progression and cell motility. Interestingly, some genes that promote cell motility are activated by CUX1, while some genes that inhibit cell motility are repressed by CUX1. The dual function of CUX1 as an activator and repressor is best exemplified by the regulatory cascade whereby CUX1 activates expression of the Snail and Slug transcription factors and then cooperates with them to repress the E-cadherin and occludin genes, thereby causing a severe disorganization of cell-cell junctions. Together, these studies indicate that CUX1 stimulates cell motility by regulating a large number of genes involved in various molecular functions.
Collapse
|