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Hu L, Chen W, Qian A, Li YP. Wnt/β-catenin signaling components and mechanisms in bone formation, homeostasis, and disease. Bone Res 2024; 12:39. [PMID: 38987555 PMCID: PMC11237130 DOI: 10.1038/s41413-024-00342-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 04/27/2024] [Accepted: 05/12/2024] [Indexed: 07/12/2024] Open
Abstract
Wnts are secreted, lipid-modified proteins that bind to different receptors on the cell surface to activate canonical or non-canonical Wnt signaling pathways, which control various biological processes throughout embryonic development and adult life. Aberrant Wnt signaling pathway underlies a wide range of human disease pathogeneses. In this review, we provide an update of Wnt/β-catenin signaling components and mechanisms in bone formation, homeostasis, and diseases. The Wnt proteins, receptors, activators, inhibitors, and the crosstalk of Wnt signaling pathways with other signaling pathways are summarized and discussed. We mainly review Wnt signaling functions in bone formation, homeostasis, and related diseases, and summarize mouse models carrying genetic modifications of Wnt signaling components. Moreover, the therapeutic strategies for treating bone diseases by targeting Wnt signaling, including the extracellular molecules, cytosol components, and nuclear components of Wnt signaling are reviewed. In summary, this paper reviews our current understanding of the mechanisms by which Wnt signaling regulates bone formation, homeostasis, and the efforts targeting Wnt signaling for treating bone diseases. Finally, the paper evaluates the important questions in Wnt signaling to be further explored based on the progress of new biological analytical technologies.
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Affiliation(s)
- Lifang Hu
- Laboratory for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Laboratory for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Wei Chen
- Division in Cellular and Molecular Medicine, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane University, New Orleans, LA, 70112, USA
| | - Airong Qian
- Laboratory for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Laboratory for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
| | - Yi-Ping Li
- Division in Cellular and Molecular Medicine, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane University, New Orleans, LA, 70112, USA.
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2
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You L, Dou Y, Zhang Y, Xiao H, Lv H, Wei GH, Xu D. SDC2 Stabilization by USP14 Promotes Gastric Cancer Progression through Co-option of PDK1. Int J Biol Sci 2023; 19:3483-3498. [PMID: 37496999 PMCID: PMC10367555 DOI: 10.7150/ijbs.84331] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023] Open
Abstract
Gastric cancer (GC) is a common malignancy and remains the fourth-leading cause of cancer-related deaths worldwide. Oncogenic potential of SDC2 has been implicated in multiple types of cancers, yet its role and underlying molecular mechanisms in GC remain unknown. Here, we found that SDC2 was highly expressed in GC and its upregulation correlated with poor prognosis in GC patients. Depletion of SDC2 significantly suppressed the growth and invasive capability of GC cells, while overexpressing SDC2 exerts opposite effects. Combined bioinformatics and experimental analyses substantiated that overexpression of SDC2 activated the AKT signaling pathway in GC, mechanistically through the interaction between SDC2 and PDK1-PH domain, thereby facilitating PDK1 membrane translocation to promote AKT activation. Moreover, SDC2 could also function as a co-receptor for FGF2 and was profoundly involved in the FGF2-AKT signaling axis in GC. Lastly, we revealed a mechanism on the USP14-mediated stabilization of SDC2 that is likely to contribute to SDC2 upregulation in GC tissues. Furthermore, we showed that IU1, a potent USP14 inhibitor, decreased the abundance of SDC2 in GC cells. Our findings indicate that SDC2 functions as a novel GC oncogene and has potential utility as a diagnostic marker and therapeutic target for GC.
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Affiliation(s)
- Li You
- Department of Gastric Surgery, Fudan University Shanghai Cancer, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yi Dou
- Department of Gastric Surgery, Fudan University Shanghai Cancer, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yu Zhang
- Department of Gastric Surgery, Fudan University Shanghai Cancer, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Hongwei Xiao
- Key Laboratory of Animal Embryo Engineering and Molecular Breeding of Hubei province, Institute of Animal Husbandry and Veterinary, Hubei Academy of Agricultural Science, Wuhan 430064, China
| | - Hong Lv
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Gong-Hong Wei
- Department of Gastric Surgery, Fudan University Shanghai Cancer, Shanghai 200032, China
- MOE Key Laboratory of Metabolism and Molecular Medicine and Department of Biochemistry and Molecular Biology of School of Basic Medical Sciences, and Fudan University Shanghai Cancer Center, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Dazhi Xu
- Department of Gastric Surgery, Fudan University Shanghai Cancer, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
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3
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Shaik F, Balderstone MJM, Arokiasamy S, Whiteford JR. Roles of Syndecan-4 in cardiac injury and repair. Int J Biochem Cell Biol 2022; 146:106196. [PMID: 35331918 DOI: 10.1016/j.biocel.2022.106196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 11/30/2022]
Abstract
The heparan sulphate proteoglycan Syndecan-4 belongs to a 4-member family of transmembrane receptors. Genetic deletion of Syndecan-4 in mice causes negligible developmental abnormalities however when challenged these animals show distinct phenotypes. Synedcan-4 is expressed in many cell types in the heart and its expression is elevated in response to cardiac injury and recent studies have suggested roles for Syndecan-4 in repair mechanisms within the damaged heart. The purpose of this review is to explore these biological insights into the role of Syndecan-4 in both the injured heart and later during cardiac repair and remodeling.
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Affiliation(s)
- Faheem Shaik
- William Harvey Research Institute, Centre for Microvascular Research, Faculty of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, EC1M 6BQ, UK
| | - Michaela J M Balderstone
- William Harvey Research Institute, Centre for Microvascular Research, Faculty of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, EC1M 6BQ, UK
| | - Samantha Arokiasamy
- William Harvey Research Institute, Centre for Microvascular Research, Faculty of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, EC1M 6BQ, UK.
| | - James R Whiteford
- William Harvey Research Institute, Centre for Microvascular Research, Faculty of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, EC1M 6BQ, UK.
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4
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Proteomic analysis identifies the E3 ubiquitin ligase Pdzrn3 as a regulatory target of Wnt5a-Ror signaling. Proc Natl Acad Sci U S A 2021; 118:2104944118. [PMID: 34135125 DOI: 10.1073/pnas.2104944118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Wnt5a-Ror signaling is a conserved pathway that regulates morphogenetic processes during vertebrate development [R. T. Moon et al, Development 119, 97-111 (1993); I. Oishi et al, Genes Cells 8, 645-654 (2003)], but its downstream signaling events remain poorly understood. Through a large-scale proteomic screen in mouse embryonic fibroblasts, we identified the E3 ubiquitin ligase Pdzrn3 as a regulatory target of the Wnt5a-Ror pathway. Upon pathway activation, Pdzrn3 is degraded in a β-catenin-independent, ubiquitin-proteasome system-dependent manner. We developed a flow cytometry-based reporter to monitor Pdzrn3 abundance and delineated a signaling cascade involving Frizzled, Dishevelled, Casein kinase 1, and Glycogen synthase kinase 3 that regulates Pdzrn3 stability. Epistatically, Pdzrn3 is regulated independently of Kif26b, another Wnt5a-Ror effector. Wnt5a-dependent degradation of Pdzrn3 requires phosphorylation of three conserved amino acids within its C-terminal LNX3H domain [M. Flynn, O. Saha, P. Young, BMC Evol. Biol. 11, 235 (2011)], which acts as a bona fide Wnt5a-responsive element. Importantly, this phospho-dependent degradation is essential for Wnt5a-Ror modulation of cell migration. Collectively, this work establishes a Wnt5a-Ror cell morphogenetic cascade involving Pdzrn3 phosphorylation and degradation.
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Syndecan-4 as a Pathogenesis Factor and Therapeutic Target in Cancer. Biomolecules 2021; 11:biom11040503. [PMID: 33810567 PMCID: PMC8065655 DOI: 10.3390/biom11040503] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 02/07/2023] Open
Abstract
Cancer is an important cause of morbidity and mortality worldwide. Advances in research on the biology of cancer revealed alterations in several key pathways underlying tumorigenesis and provided molecular targets for developing new and improved existing therapies. Syndecan-4, a transmembrane heparan sulfate proteoglycan, is a central mediator of cell adhesion, migration and proliferation. Although several studies have demonstrated important roles of syndecan-4 in cell behavior and its interactions with growth factors, extracellular matrix (ECM) molecules and cytoskeletal signaling proteins, less is known about its role and expression in multiple cancer. The data summarized in this review demonstrate that high expression of syndecan-4 is an unfavorable biomarker for estrogen receptor-negative breast cancer, glioma, liver cancer, melanoma, osteosarcoma, papillary thyroid carcinoma and testicular, kidney and bladder cancer. In contrast, in neuroblastoma and colorectal cancer, syndecan-4 is downregulated. Interestingly, syndecan-4 expression is modulated by anticancer drugs. It is upregulated upon treatment with zoledronate and this effect reduces invasion of breast cancer cells. In our recent work, we demonstrated that the syndecan-4 level was reduced after trastuzumab treatment. Similarly, syndecan-4 levels are also reduced after panitumumab treatment. Together, the data found suggest that syndecan-4 level is crucial for understanding the changes involving in malignant transformation, and also demonstrate that syndecan-4 emerges as an important target for cancer therapy and diagnosis.
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Banerjee S, Mukherjee S, Bhattacharya A, Basak U, Chakraborty S, Paul S, Khan P, Jana K, Hazra TK, Das T. Pyridoxine enhances chemo-responsiveness of breast cancer stem cells via redox reconditioning. Free Radic Biol Med 2020; 152:152-165. [PMID: 32145302 DOI: 10.1016/j.freeradbiomed.2020.02.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 02/28/2020] [Indexed: 12/14/2022]
Abstract
A plethora of molecular strategies are employed by breast cancer stem cells (bCSCs) to evade chemotherapy-induced death signals, redox modulation being a crucial factor among those. Here, we observed that bCSCs are resistant to DNA damage and generate low ROS upon doxorubicin (Dox) treatment. Further exploration revealed inherently high NEIL2, a base excision repair (BER) enzyme that plays a key regulatory role in repairing DNA damage, in bCSCs. However, its role in modulating the redox status of bCSCs remains unexplored. In addition, Dox not only upregulates NEIL2 in bCSCs at both transcriptional and translational levels but also declines p300-induced acetylation thus activating NEIL2 and providing a protective effect against the stress inflicted by the genotoxic drug. However, when the redox status of bCSCs is altered by inducing high ROS, apoptosis of the resistant population is accomplished. Subsequently, when NEIL2 is suppressed in bCSCs, chemo-sensitization of the resistant population is enabled by redox reconditioning via impaired DNA repair. This signifies a possibility of therapeutically disrupting the redox balance in bCSCs to enhance their chemo-responsiveness. Our search for an inhibitor of NEIL2 revealed that vitamin B6, i.e., pyridoxine (PN), hinders NEIL2-mediated transcription-coupled repair process by not only decreasing NEIL2 expression but also inhibiting its association with RNA Pol II, thus stimulating DNA damage and triggering ROS. As a consequence of altered redox regulation, bCSCs become susceptible towards Dox, which then induces apoptosis via caspase cascade. These findings signify that PN enhances chemo-responsiveness of bCSCs via redox reconditioning.
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Affiliation(s)
- Shruti Banerjee
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Shravanti Mukherjee
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Apoorva Bhattacharya
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Udit Basak
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Sourio Chakraborty
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Swastika Paul
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Poulami Khan
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Kuladip Jana
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India
| | - Tapas K Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555-1074, USA
| | - Tanya Das
- Division of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme, VIIM, Kolkata, 700054, India.
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Hodzic E, Shrestha R, Zhu K, Cheng K, Collins CC, Cenk Sahinalp S. Combinatorial Detection of Conserved Alteration Patterns for Identifying Cancer Subnetworks. Gigascience 2019; 8:giz024. [PMID: 30978274 PMCID: PMC6458499 DOI: 10.1093/gigascience/giz024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/12/2018] [Accepted: 02/21/2019] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Advances in large-scale tumor sequencing have led to an understanding that there are combinations of genomic and transcriptomic alterations specific to tumor types, shared across many patients. Unfortunately, computational identification of functionally meaningful and recurrent alteration patterns within gene/protein interaction networks has proven to be challenging. FINDINGS We introduce a novel combinatorial method, cd-CAP (combinatorial detection of conserved alteration patterns), for simultaneous detection of connected subnetworks of an interaction network where genes exhibit conserved alteration patterns across tumor samples. Our method differentiates distinct alteration types associated with each gene (rather than relying on binary information of a gene being altered or not) and simultaneously detects multiple alteration profile conserved subnetworks. CONCLUSIONS In a number of The Cancer Genome Atlas datasets, cd-CAP identified large biologically significant subnetworks with conserved alteration patterns, shared across many tumor samples.
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Affiliation(s)
- Ermin Hodzic
- Laboratory for Advanced Genome Analysis, Vancouver Prostate Centre, 2660 Oak St, Vancouver, BC, V6H 3Z6, Canada
- School of Computing Science, Simon Fraser University, 8888 University Dr, Burnaby, BC, V5A 1S6, Canada
| | - Raunak Shrestha
- Laboratory for Advanced Genome Analysis, Vancouver Prostate Centre, 2660 Oak St, Vancouver, BC, V6H 3Z6, Canada
- Department of Urologic Sciences, University of British Columbia, 2775 Laurel St, Vancouver, BC, V5Z 1M9, Canada
| | - Kaiyuan Zhu
- Department of Computer Science, Indiana University Bloomington, 700 N. Woodlawn Ave, Bloomington, IN, 47408, USA
| | - Kuoyuan Cheng
- Center for Bioinformatics and Computational Biology, University of Maryland, 8125 Paint Branch Dr, College Park, MD, 20742, USA
| | - Colin C Collins
- Laboratory for Advanced Genome Analysis, Vancouver Prostate Centre, 2660 Oak St, Vancouver, BC, V6H 3Z6, Canada
- Department of Urologic Sciences, University of British Columbia, 2775 Laurel St, Vancouver, BC, V5Z 1M9, Canada
| | - S Cenk Sahinalp
- Laboratory for Advanced Genome Analysis, Vancouver Prostate Centre, 2660 Oak St, Vancouver, BC, V6H 3Z6, Canada
- Department of Computer Science, Indiana University Bloomington, 700 N. Woodlawn Ave, Bloomington, IN, 47408, USA
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8
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Karuna EP, Choi SS, Scales MK, Hum J, Cohen M, Fierro FA, Ho HYH. Identification of a WNT5A-Responsive Degradation Domain in the Kinesin Superfamily Protein KIF26B. Genes (Basel) 2018; 9:E196. [PMID: 29621187 PMCID: PMC5924538 DOI: 10.3390/genes9040196] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/24/2018] [Accepted: 03/26/2018] [Indexed: 11/17/2022] Open
Abstract
Noncanonical WNT pathways function independently of the β-catenin transcriptional co-activator to regulate diverse morphogenetic and pathogenic processes. Recent studies showed that noncanonical WNTs, such as WNT5A, can signal the degradation of several downstream effectors, thereby modulating these effectors' cellular activities. The protein domain(s) that mediates the WNT5A-dependent degradation response, however, has not been identified. By coupling protein mutagenesis experiments with a flow cytometry-based degradation reporter assay, we have defined a protein domain in the kinesin superfamily protein KIF26B that is essential for WNT5A-dependent degradation. We found that a human disease-causing KIF26B mutation located at a conserved amino acid within this domain compromises the ability of WNT5A to induce KIF26B degradation. Using pharmacological perturbation, we further uncovered a role of glycogen synthase kinase 3 (GSK3) in WNT5A regulation of KIF26B degradation. Lastly, based on the identification of the WNT5A-responsive domain, we developed a new reporter system that allows for efficient profiling of WNT5A-KIF26B signaling activity in both somatic and stem cells. In conclusion, our study identifies a new protein domain that mediates WNT5A-dependent degradation of KIF26B and provides a new tool for functional characterization of noncanonical WNT5A signaling in cells.
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Affiliation(s)
- Edith P Karuna
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Shannon S Choi
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Michael K Scales
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Jennie Hum
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Michael Cohen
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Fernando A Fierro
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
| | - Hsin-Yi Henry Ho
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA.
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9
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Wang X, Zhang Q, Cai Z, Dai Y, Mou L. Identification of novel diagnostic biomarkers for thyroid carcinoma. Oncotarget 2017; 8:111551-111566. [PMID: 29340074 PMCID: PMC5762342 DOI: 10.18632/oncotarget.22873] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/19/2017] [Indexed: 12/30/2022] Open
Abstract
Thyroid carcinoma (THCA) is the most universal endocrine malignancy worldwide. Unfortunately, a limited number of large-scale analyses have been performed to identify biomarkers for THCA. Here, we conducted a meta-analysis using 505 THCA patients and 59 normal controls from The Cancer Genome Atlas. After identifying differentially expressed long non-coding RNA (lncRNA) and protein coding genes (PCG), we found vast difference in various lncRNA-PCG co-expressed pairs in THCA. A dysregulation network with scale-free topology was constructed. Four molecules (LA16c-380H5.2, RP11-203J24.8, MLF1 and SDC4) could potentially serve as diagnostic biomarkers of THCA with high sensitivity and specificity. We further represent a diagnostic panel with expression cutoff values. Our results demonstrate the potential application of those four molecules as novel independent biomarkers for THCA diagnosis.
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Affiliation(s)
- Xiliang Wang
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, China.,Department of Biochemistry in Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Qing Zhang
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, China
| | - Zhiming Cai
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, China
| | - Yifan Dai
- Jiangsu Key Laboratory of Xenotransplantation, Nanjing Medical University, Nanjing 210029, China
| | - Lisha Mou
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, China
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10
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Susman MW, Karuna EP, Kunz RC, Gujral TS, Cantú AV, Choi SS, Jong BY, Okada K, Scales MK, Hum J, Hu LS, Kirschner MW, Nishinakamura R, Yamada S, Laird DJ, Jao LE, Gygi SP, Greenberg ME, Ho HYH. Kinesin superfamily protein Kif26b links Wnt5a-Ror signaling to the control of cell and tissue behaviors in vertebrates. eLife 2017; 6:e26509. [PMID: 28885975 PMCID: PMC5590807 DOI: 10.7554/elife.26509] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 08/15/2017] [Indexed: 12/20/2022] Open
Abstract
Wnt5a-Ror signaling constitutes a developmental pathway crucial for embryonic tissue morphogenesis, reproduction and adult tissue regeneration, yet the molecular mechanisms by which the Wnt5a-Ror pathway mediates these processes are largely unknown. Using a proteomic screen, we identify the kinesin superfamily protein Kif26b as a downstream target of the Wnt5a-Ror pathway. Wnt5a-Ror, through a process independent of the canonical Wnt/β-catenin-dependent pathway, regulates the cellular stability of Kif26b by inducing its degradation via the ubiquitin-proteasome system. Through this mechanism, Kif26b modulates the migratory behavior of cultured mesenchymal cells in a Wnt5a-dependent manner. Genetic perturbation of Kif26b function in vivo caused embryonic axis malformations and depletion of primordial germ cells in the developing gonad, two phenotypes characteristic of disrupted Wnt5a-Ror signaling. These findings indicate that Kif26b links Wnt5a-Ror signaling to the control of morphogenetic cell and tissue behaviors in vertebrates and reveal a new role for regulated proteolysis in noncanonical Wnt5a-Ror signal transduction.
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Affiliation(s)
- Michael W Susman
- Department of NeurobiologyHarvard Medical SchoolBostonUnited States
| | - Edith P Karuna
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Ryan C Kunz
- Department of Cell BiologyHarvard Medical SchoolBostonUnited States
| | - Taranjit S Gujral
- Department of Systems BiologyHarvard Medical SchoolBostonUnited States
- Division of Human BiologyFred Hutchinson Cancer Research CenterSeattleUnited States
| | - Andrea V Cantú
- Department of Obstetrics, Gynecology and Reproductive SciencesCenter for Reproductive Sciences, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of CaliforniaSan FranciscoUnited States
| | - Shannon S Choi
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Brigette Y Jong
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Kyoko Okada
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Michael K Scales
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Jennie Hum
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Linda S Hu
- Department of NeurobiologyHarvard Medical SchoolBostonUnited States
| | - Marc W Kirschner
- Department of Systems BiologyHarvard Medical SchoolBostonUnited States
| | - Ryuichi Nishinakamura
- Department of Kidney DevelopmentInstitute of Molecular Embryology and Genetics, Kumamoto UniversityKumamotoJapan
| | - Soichiro Yamada
- Department of Biomedical EngineeringUniversity of CaliforniaDavisUnited States
| | - Diana J Laird
- Department of Obstetrics, Gynecology and Reproductive SciencesCenter for Reproductive Sciences, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of CaliforniaSan FranciscoUnited States
| | - Li-En Jao
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
| | - Steven P Gygi
- Department of Cell BiologyHarvard Medical SchoolBostonUnited States
| | | | - Hsin-Yi Henry Ho
- Department of NeurobiologyHarvard Medical SchoolBostonUnited States
- Department of Cell Biology and Human AnatomyUniversity of California, Davis School of MedicineDavisUnited States
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11
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Schissler AG, Li Q, Chen JL, Kenost C, Achour I, Billheimer DD, Li H, Piegorsch WW, Lussier YA. Analysis of aggregated cell-cell statistical distances within pathways unveils therapeutic-resistance mechanisms in circulating tumor cells. Bioinformatics 2017; 32:i80-i89. [PMID: 27307648 PMCID: PMC4908332 DOI: 10.1093/bioinformatics/btw248] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
MOTIVATION As 'omics' biotechnologies accelerate the capability to contrast a myriad of molecular measurements from a single cell, they also exacerbate current analytical limitations for detecting meaningful single-cell dysregulations. Moreover, mRNA expression alone lacks functional interpretation, limiting opportunities for translation of single-cell transcriptomic insights to precision medicine. Lastly, most single-cell RNA-sequencing analytic approaches are not designed to investigate small populations of cells such as circulating tumor cells shed from solid tumors and isolated from patient blood samples. RESULTS In response to these characteristics and limitations in current single-cell RNA-sequencing methodology, we introduce an analytic framework that models transcriptome dynamics through the analysis of aggregated cell-cell statistical distances within biomolecular pathways. Cell-cell statistical distances are calculated from pathway mRNA fold changes between two cells. Within an elaborate case study of circulating tumor cells derived from prostate cancer patients, we develop analytic methods of aggregated distances to identify five differentially expressed pathways associated to therapeutic resistance. Our aggregation analyses perform comparably with Gene Set Enrichment Analysis and better than differentially expressed genes followed by gene set enrichment. However, these methods were not designed to inform on differential pathway expression for a single cell. As such, our framework culminates with the novel aggregation method, cell-centric statistics (CCS). CCS quantifies the effect size and significance of differentially expressed pathways for a single cell of interest. Improved rose plots of differentially expressed pathways in each cell highlight the utility of CCS for therapeutic decision-making. AVAILABILITY AND IMPLEMENTATION http://www.lussierlab.org/publications/CCS/ CONTACT: yves@email.arizona.edu or piegorsch@math.arizona.edu SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- A Grant Schissler
- Center for Biomedical Informatics and Biostatistics (CB2) Graduate Interdisciplinary Program in Statistics Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Qike Li
- Center for Biomedical Informatics and Biostatistics (CB2) Graduate Interdisciplinary Program in Statistics Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - James L Chen
- Division of Bioinformatics, Departments of Biomedical Informatics Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Colleen Kenost
- Center for Biomedical Informatics and Biostatistics (CB2) Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Ikbel Achour
- Center for Biomedical Informatics and Biostatistics (CB2) Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - D Dean Billheimer
- Center for Biomedical Informatics and Biostatistics (CB2) Graduate Interdisciplinary Program in Statistics BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Haiquan Li
- Center for Biomedical Informatics and Biostatistics (CB2) Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Walter W Piegorsch
- Graduate Interdisciplinary Program in Statistics BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Yves A Lussier
- Center for Biomedical Informatics and Biostatistics (CB2) Graduate Interdisciplinary Program in Statistics Department of Medicine BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA The University of Arizona Cancer Center, Tucson, AZ 85719, USA Institute for Genomics and Systems Biology, The University of Chicago, Chicago, IL, 60637, USA
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12
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Livneh I, Kravtsova-Ivantsiv Y, Braten O, Kwon YT, Ciechanover A. Monoubiquitination joins polyubiquitination as an esteemed proteasomal targeting signal. Bioessays 2017; 39. [DOI: 10.1002/bies.201700027] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ido Livneh
- Technion Integrated Cancer Center (TICC); The Rappaport Faculty of Medicine and Research Institute; Technion-Israel Institute of Technology; Haifa Israel
| | - Yelena Kravtsova-Ivantsiv
- Technion Integrated Cancer Center (TICC); The Rappaport Faculty of Medicine and Research Institute; Technion-Israel Institute of Technology; Haifa Israel
| | - Ori Braten
- Technion Integrated Cancer Center (TICC); The Rappaport Faculty of Medicine and Research Institute; Technion-Israel Institute of Technology; Haifa Israel
| | - Yong Tae Kwon
- Protein Metabolism Medical Research Center and Department of Biomedical Sciences; College of Medicine; Seoul National University; Seoul South Korea
| | - Aaron Ciechanover
- Technion Integrated Cancer Center (TICC); The Rappaport Faculty of Medicine and Research Institute; Technion-Israel Institute of Technology; Haifa Israel
- Protein Metabolism Medical Research Center and Department of Biomedical Sciences; College of Medicine; Seoul National University; Seoul South Korea
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13
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Hasanov E, Chen G, Chowdhury P, Weldon J, Ding Z, Jonasch E, Sen S, Walker CL, Dere R. Ubiquitination and regulation of AURKA identifies a hypoxia-independent E3 ligase activity of VHL. Oncogene 2017; 36:3450-3463. [PMID: 28114281 PMCID: PMC5485216 DOI: 10.1038/onc.2016.495] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/15/2016] [Accepted: 11/29/2016] [Indexed: 12/18/2022]
Abstract
The hypoxia-regulated tumor-suppressor von Hippel-Lindau (VHL) is an E3 ligase that recognizes its substrates as part of an oxygen-dependent prolyl hydroxylase (PHD) reaction, with hypoxia-inducible factor α (HIFα) being its most notable substrate. Here we report that VHL has an equally important function distinct from its hypoxia-regulated activity. We find that Aurora kinase A (AURKA) is a novel, hypoxia-independent target for VHL ubiquitination. In contrast to its hypoxia-regulated activity, VHL mono-, rather than poly-ubiquitinates AURKA, in a PHD-independent reaction targeting AURKA for degradation in quiescent cells, where degradation of AURKA is required to maintain the primary cilium. Tumor-associated variants of VHL differentiate between these two functions, as a pathogenic VHL mutant that retains intrinsic ability to ubiquitinate HIFα is unable to ubiquitinate AURKA. Together, these data identify VHL as an E3 ligase with important cellular functions under both normoxic and hypoxic conditions.
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Affiliation(s)
- E Hasanov
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA.,Department of Basic Oncology, Hacettepe University Cancer Institute, Sihhiye, Ankara, Turkey
| | - G Chen
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
| | - P Chowdhury
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA.,Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX, USA
| | - J Weldon
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
| | - Z Ding
- Department of Systems Biology, U.T. M.D. Anderson Cancer Center, Houston, TX, USA
| | - E Jonasch
- Department of Genitourinary Medical Oncology, U.T. M.D. Anderson Cancer Center, Houston, TX, USA
| | - S Sen
- Department of Translational Molecular Pathology, U.T. M.D. Anderson Cancer Center, Houston, TX, USA
| | - C L Walker
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA.,Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX, USA
| | - R Dere
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA.,Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX, USA
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14
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Bouin AP, Kyurmurkov A, Régent-Kloeckner M, Ribba AS, Faurobert E, Fournier HN, Bourrin-Reynard I, Manet-Dupé S, Oddou C, Balland M, Planus E, Albiges-Rizo C. ICAP-1 monoubiquitination coordinates matrix density and rigidity sensing for cell migration through ROCK2- MRCKα balance. J Cell Sci 2017; 130:626-636. [DOI: 10.1242/jcs.200139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 12/08/2016] [Indexed: 12/21/2022] Open
Abstract
Cell migration is a complex process requiring density and rigidity sensing of the microenvironment to adapt cell migratory speed through focal adhesion and actin cytoskeleton regulation. ICAP-1, a β1 integrin partner, is essential for ensuring integrin activation cycle and focal adhesion formation. We show that ICAP-1 is monoubiquitinated by Smurf1, preventing ICAP-1 binding to β1 integrin. The non-ubiquitinable form of ICAP-1 modifies β1 integrin focal adhesion organization and interferes with fibronectin density sensing. ICAP-1 is also required for adapting cell migration in response to substrate stiffness in a β1 integrin-independent manner. ICAP-1 monoubiquitination regulates rigidity sensing by increasing MRCKα-dependent cell contractility through myosin phosphorylation independently of substrate rigidity. We provide evidence that ICAP-1 monoubiquitination helps in switching from ROCK2-mediated to MRCKα-mediated cell contractility. ICAP-1 monoubiquitination serves as a molecular switch to coordinate extracellular matrix density and rigidity sensing thus acting as a critical modulator of cell migration and mechanosensing.
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Affiliation(s)
- Anne-Pascale Bouin
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Alexander Kyurmurkov
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Myriam Régent-Kloeckner
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Anne-Sophie Ribba
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Eva Faurobert
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Henri-Noël Fournier
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Ingrid Bourrin-Reynard
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Sandra Manet-Dupé
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Christiane Oddou
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Martial Balland
- CNRS UMR 5309, F-38042 Grenoble, France
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588Grenoble, France
| | - Emmanuelle Planus
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
| | - Corinne Albiges-Rizo
- INSERM U1209, Grenoble, F-38042, France
- Université Grenoble Alpes, Institute for Advanced Biosciences, 38042 Grenoble, France
- CNRS UMR 5309, F-38042 Grenoble, France
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15
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Cohen-Kaplan V, Livneh I, Avni N, Cohen-Rosenzweig C, Ciechanover A. The ubiquitin-proteasome system and autophagy: Coordinated and independent activities. Int J Biochem Cell Biol 2016; 79:403-418. [DOI: 10.1016/j.biocel.2016.07.019] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/13/2016] [Accepted: 07/18/2016] [Indexed: 01/10/2023]
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16
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Numerous proteins with unique characteristics are degraded by the 26S proteasome following monoubiquitination. Proc Natl Acad Sci U S A 2016; 113:E4639-47. [PMID: 27385826 DOI: 10.1073/pnas.1608644113] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The "canonical" proteasomal degradation signal is a substrate-anchored polyubiquitin chain. However, a handful of proteins were shown to be targeted following monoubiquitination. In this study, we established-in both human and yeast cells-a systematic approach for the identification of monoubiquitination-dependent proteasomal substrates. The cellular wild-type polymerizable ubiquitin was replaced with ubiquitin that cannot form chains. Using proteomic analysis, we screened for substrates that are nevertheless degraded under these conditions compared with those that are stabilized, and therefore require polyubiquitination for their degradation. For randomly sampled representative substrates, we confirmed that their cellular stability is in agreement with our screening prediction. Importantly, the two groups display unique features: monoubiquitinated substrates are smaller than the polyubiquitinated ones, are enriched in specific pathways, and, in humans, are structurally less disordered. We suggest that monoubiquitination-dependent degradation is more widespread than assumed previously, and plays key roles in various cellular processes.
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17
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Zhang Z, Rankin SA, Zorn AM. Syndecan4 coordinates Wnt/JNK and BMP signaling to regulate foregut progenitor development. Dev Biol 2016; 416:187-199. [PMID: 27235146 PMCID: PMC5293220 DOI: 10.1016/j.ydbio.2016.05.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/21/2016] [Accepted: 05/21/2016] [Indexed: 01/17/2023]
Abstract
Temporally and spatially dynamic Wnt and BMP signals are essential to pattern foregut endoderm progenitors that give rise to the liver, pancreas and lungs, but how these two signaling pathways are coordinated in the extracellular space is unknown. Here we identify the transmembrane heparan sulphate proteoglycan Syndecan-4 (Sdc4), as a key regulator of both non-canonical Wnt and BMP signaling in the Xenopus foregut. Foregut-specific Sdc4 depletion results in a disrupted Fibronectin (Fn1) matrix, reduced cell adhesion, and failure to maintain foregut gene expression ultimately leading to foregut organ hypoplasia. Sdc4 is required to maintain robust Wnt/JNK and BMP/Smad1 signaling in the hhex+ foregut progenitors. Pathway analysis suggests that Sdc4 functionally interacts with Fzd7 to promote Wnt/JNK signaling, which maintains foregut identity and cell adhesion. In addition, the Sdc4 ectodomain is required to support Fn1 matrix assembly, which is essential for the robust BMP signaling that promotes foregut gene expression. This work sheds lights on how the extracellular matrix can coordinate different signaling pathways during organogenesis.
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Affiliation(s)
- Zheng Zhang
- Perinatal Institute, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center and the College of Medicine, University of Cincinnati, Cincinnati, OH 45229, USA
| | - Scott A Rankin
- Perinatal Institute, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center and the College of Medicine, University of Cincinnati, Cincinnati, OH 45229, USA
| | - Aaron M Zorn
- Perinatal Institute, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center and the College of Medicine, University of Cincinnati, Cincinnati, OH 45229, USA.
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18
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Epitope mapping by a Wnt-blocking antibody: evidence of the Wnt binding domain in heparan sulfate. Sci Rep 2016; 6:26245. [PMID: 27185050 PMCID: PMC4869111 DOI: 10.1038/srep26245] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 04/28/2016] [Indexed: 12/13/2022] Open
Abstract
Heparan sulfate (HS) is a polysaccharide known to modulate many important biological processes, including Wnt signaling. However, the biochemical interaction between HS and Wnt molecules is not well characterized largely due to the lack of suitable methods. To determine the Wnt binding domain in HS, we used a Wnt signaling-inhibitory antibody (HS20) and a panel of synthetic HS oligosaccharides with distinct lengths and sulfation modifications. We found that the binding of HS20 to heparan sulfate required sulfation at both the C2 position (2-O-sulfation) and C6 position (6-O-sulfation). The oligosaccharides with the greatest competitive effect for HS20 binding were between six and eight saccharide residues in length. Additionally, a four residue-long oligosaccharide could also be recognized by HS20 if an additional 3-O-sulfation modification was present. Furthermore, similar oligosaccharides with 2-O, 6-O and 3-O-sulfations showed inhibition for Wnt activation. These results have revealed that HS20 and Wnt recognize a HS structure containing IdoA2S and GlcNS6S, and that the 3-O-sulfation in GlcNS6S3S significantly enhances the binding of both HS20 and Wnt. This study provides the evidence for identifying the Wnt binding domain in HS and suggests a therapeutic approach to target the interaction of Wnt and HS in cancer and other diseases.
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19
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The Ubiquitination of NF-κB Subunits in the Control of Transcription. Cells 2016; 5:cells5020023. [PMID: 27187478 PMCID: PMC4931672 DOI: 10.3390/cells5020023] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/03/2016] [Accepted: 05/06/2016] [Indexed: 02/06/2023] Open
Abstract
Nuclear factor (NF)-κB has evolved as a latent, inducible family of transcription factors fundamental in the control of the inflammatory response. The transcription of hundreds of genes involved in inflammation and immune homeostasis require NF-κB, necessitating the need for its strict control. The inducible ubiquitination and proteasomal degradation of the cytoplasmic inhibitor of κB (IκB) proteins promotes the nuclear translocation and transcriptional activity of NF-κB. More recently, an additional role for ubiquitination in the regulation of NF-κB activity has been identified. In this case, the ubiquitination and degradation of the NF-κB subunits themselves plays a critical role in the termination of NF-κB activity and the associated transcriptional response. While there is still much to discover, a number of NF-κB ubiquitin ligases and deubiquitinases have now been identified which coordinate to regulate the NF-κB transcriptional response. This review will focus the regulation of NF-κB subunits by ubiquitination, the key regulatory components and their impact on NF-κB directed transcription.
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20
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Bustos F, de la Vega E, Cabezas F, Thompson J, Cornelison DDW, Olwin BB, Yates JR, Olguín HC. NEDD4 Regulates PAX7 Levels Promoting Activation of the Differentiation Program in Skeletal Muscle Precursors. Stem Cells 2015; 33:3138-51. [PMID: 26304770 DOI: 10.1002/stem.2125] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 06/15/2015] [Indexed: 02/06/2023]
Abstract
The transcription factor Pax7 regulates skeletal muscle stem cell (satellite cells) specification and maintenance through various mechanisms, including repressing the activity of the muscle regulatory factor MyoD. Hence, Pax7-to-MyoD protein ratios can determine maintenance of the committed-undifferentiated state or activation of the differentiation program. Pax7 expression decreases sharply in differentiating myoblasts but is maintained in cells (re)acquiring quiescence, yet the mechanisms regulating Pax7 levels based on differentiation status are not well understood. Here we show that Pax7 levels are directly regulated by the ubiquitin-ligase Nedd4. Our results indicate that Nedd4 is expressed in quiescent and activated satellite cells, that Nedd4 and Pax7 physically interact during early muscle differentiation-correlating with Pax7 ubiquitination and decline-and that Nedd4 loss of function prevented this effect. Furthermore, even transient nuclear accumulation of Nedd4 induced a drop in Pax7 levels and precocious muscle differentiation. Consequently, we propose that Nedd4 functions as a novel Pax7 regulator, which activity is temporally and spatially controlled to modulate the Pax7 protein levels and therefore satellite cell fate.
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Affiliation(s)
- Francisco Bustos
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Eduardo de la Vega
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Felipe Cabezas
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - James Thompson
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California, USA
| | - D D W Cornelison
- Division of Biological Sciences, University of Missouri, Columbia, Missouri, USA.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, USA
| | - Bradley B Olwin
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, Colorado, USA
| | - John R Yates
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California, USA
| | - Hugo C Olguín
- Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
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21
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Rønning SB, Carlson CR, Stang E, Kolset SO, Hollung K, Pedersen ME. Syndecan-4 Regulates Muscle Differentiation and Is Internalized from the Plasma Membrane during Myogenesis. PLoS One 2015; 10:e0129288. [PMID: 26068620 PMCID: PMC4467083 DOI: 10.1371/journal.pone.0129288] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 05/06/2015] [Indexed: 12/31/2022] Open
Abstract
The cell surface proteoglycan syndecan-4 has been reported to be crucial for muscle differentiation, but the molecular mechanisms still remain to be fully understood. During in vitro differentiation of bovine muscle cells immunocytochemical analyses showed strong labelling of syndecan-4 intracellularly, in close proximity with Golgi structures, in membranes of intracellular vesicles and finally, in the nuclear area including the nuclear envelope. Chase experiments showed that syndecan-4 was internalized from the plasma membrane during this process. Furthermore, when syndecan-4 was knocked down by siRNA more myotubes were formed, and the expression of myogenic transcription factors, β1-integrin and actin was influenced. However, when bovine muscle cells were treated with a cell-penetrating peptide containing the cytoplasmic region of syndecan-4, myoblast fusion and thus myotube formation was blocked, both in normal cells and in syndecan-4 knock down cells. Altogether this suggests that the cytoplasmic domain of syndecan-4 is important in regulation of myogenesis. The internalization of syndecan-4 from the plasma membrane during muscle differentiation and the nuclear localization of syndecan-4 in differentiated muscle cells may be part of this regulation, and is a novel aspect of syndecan biology which merits further studies.
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Affiliation(s)
| | - Cathrine R. Carlson
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, Oslo, Norway
| | - Espen Stang
- Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo, Norway
| | - Svein O. Kolset
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
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22
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Sokol SY. Spatial and temporal aspects of Wnt signaling and planar cell polarity during vertebrate embryonic development. Semin Cell Dev Biol 2015; 42:78-85. [PMID: 25986055 PMCID: PMC4562884 DOI: 10.1016/j.semcdb.2015.05.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 05/08/2015] [Indexed: 11/19/2022]
Abstract
Wnt signaling pathways act at multiple locations and developmental stages to specify cell fate and polarity in vertebrate embryos. A long-standing question is how the same molecular machinery can be reused to produce different outcomes. The canonical Wnt/β-catenin branch modulates target gene transcription to specify cell fates along the dorsoventral and anteroposterior embryonic axes. By contrast, the Wnt/planar cell polarity (PCP) branch is responsible for cell polarization along main body axes, which coordinates morphogenetic cell behaviors during gastrulation and neurulation. Whereas both cell fate and cell polarity are modulated by spatially- and temporally-restricted Wnt activity, the downstream signaling mechanisms are very diverse. This review highlights recent progress in the understanding of Wnt-dependent molecular events leading to the establishment of PCP and linking it to early morphogenetic processes.
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Affiliation(s)
- Sergei Y Sokol
- Department of Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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23
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Pataki CA, Couchman JR, Brábek J. Wnt Signaling Cascades and the Roles of Syndecan Proteoglycans. J Histochem Cytochem 2015; 63:465-80. [PMID: 25910817 DOI: 10.1369/0022155415586961] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 04/21/2015] [Indexed: 12/17/2022] Open
Abstract
Wnt signaling comprises a group of pathways emanating from the extracellular environment through cell-surface receptors into the intracellular milieu. Wnt signaling cascades can be divided into two main branches, the canonical/β-catenin pathway and the non-canonical pathways containing the Wnt/planar cell polarity and Wnt/calcium signaling. Syndecans are type I transmembrane proteoglycans with a long evolutionary history, being expressed in all Bilateria and in almost all cell types. Both Wnt pathways have been extensively studied over the past 30 years and shown to have roles during development and in a multitude of diseases. Although the first evidence for interactions between syndecans and Wnts dates back to 1997, the number of studies connecting these pathways is low, and many open questions remained unanswered. In this review, syndecan's involvement in Wnt signaling pathways as well as some of the pathologies resulting from dysregulation of the components of these pathways are summarized.
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Affiliation(s)
- Csilla A Pataki
- Department of Cell Biology, Charles University in Prague, Czech Republic, University of Copenhagen, Denmark (CAP,JB)
| | - John R Couchman
- Department of Biomedical Sciences and Biotech Research and Innovation Center, University of Copenhagen, Denmark (JRC)
| | - Jan Brábek
- Department of Cell Biology, Charles University in Prague, Czech Republic, University of Copenhagen, Denmark (CAP,JB)
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24
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Kegelman TP, Das SK, Emdad L, Hu B, Menezes ME, Bhoopathi P, Wang XY, Pellecchia M, Sarkar D, Fisher PB. Targeting tumor invasion: the roles of MDA-9/Syntenin. Expert Opin Ther Targets 2014; 19:97-112. [PMID: 25219541 DOI: 10.1517/14728222.2014.959495] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Melanoma differentiation-associated gene - 9 (MDA-9)/Syntenin has become an increasingly popular focus for investigation in numerous cancertypes. Originally implicated in melanoma metastasis, it has diverse cellular roles and is consistently identified as a regulator of tumor invasion and angiogenesis. As a potential target for inhibiting some of the most lethal aspects of cancer progression, further insight into the function of MDA-9/Syntenin is mandatory. AREAS COVERED Recent literature and seminal articles were reviewed to summarize the latest collective understanding of MDA-9/Syntenin's role in normal and cancerous settings. Insights into its participation in developmental processes are included, as is the functional significance of the N- and C-terminals and PDZ domains of MDA-9/Syntenin. Current reports highlight the clinical significance of MDA-9/Syntenin expression level in a variety of cancers, often correlating directly with reduced patient survival. Also presented are assessments of roles of MDA-9/Syntenin in cancer progression as well as its functions as an intracellular adapter molecule. EXPERT OPINION Multiple studies demonstrate the importance of MDA-9/Syntenin in tumor invasion and progression. Through the use of novel drug design approaches, this protein may provide a worthwhile therapeutic target. As many conventional therapies do not address, or even enhance, tumor invasion, an anti-invasive approach would be a worthwhile addition in cancer therapy.
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Affiliation(s)
- Timothy P Kegelman
- Virginia Commonwealth University, School of Medicine, Department of Human and Molecular Genetics , Richmond, VA , USA
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25
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Syndecan-4 inhibits Wnt/β-catenin signaling through regulation of low-density-lipoprotein receptor-related protein (LRP6) and R-spondin 3. Int J Biochem Cell Biol 2013; 46:103-12. [PMID: 24275095 DOI: 10.1016/j.biocel.2013.11.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 10/18/2013] [Accepted: 11/06/2013] [Indexed: 11/21/2022]
Abstract
Regulation of Wnt signaling is crucial for embryonic development and adult homeostasis. Here we study the role of Syndecan-4 (SDC4), a cell-surface heparan sulphate proteoglycan, and Fibronectin (FN), in Wnt/β-catenin signaling. Gain- and loss-of-function experiments in mammalian cell lines and Xenopus embryos demonstrate that SDC4 and FN inhibit Wnt/β-catenin signaling. Epistatic and biochemical experiments show that this inhibition occurs at the cell membrane level through regulation of LRP6. R-spondin 3, a ligand that promotes canonical and non-canonical Wnt signaling, is more prone to potentiate Wnt/β-catenin signaling when SDC4 levels are reduced, suggesting a model whereby SDC4 tunes the ability of R-spondin to modulate the different Wnt signaling pathways. Since SDC4 has been previously related to non-canonical Wnt signaling, our results also suggest that this proteoglycan can be a key component in the regulation of Wnt signaling.
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Ciechanover A, Stanhill A. The complexity of recognition of ubiquitinated substrates by the 26S proteasome. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1843:86-96. [PMID: 23872423 DOI: 10.1016/j.bbamcr.2013.07.007] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/02/2013] [Accepted: 07/08/2013] [Indexed: 02/03/2023]
Abstract
The Ubiquitin Proteasome System (UPS) was discovered in two steps. Initially, APF-1 (ATP-dependent proteolytic Factor 1) later identified as ubiquitin (Ub), a hitherto known protein of unknown function, was found to covalently modify proteins. This modification led to degradation of the tagged protein by - at that time - an unknown protease. This was followed later by the identification of the 26S proteasome complex which is composed of a previously identified Multi Catalytic Protease (MCP) and an additional regulatory complex, as the protease that degrades Ub-tagged proteins. While Ub conjugation and proteasomal degradation are viewed as a continued process responsible for most of the regulated proteolysis in the cell, the two processes have also independent roles. In parallel and in the years that followed, the hallmark signal that links the substrate to the proteasome was identified as an internal Lys48-based polyUb chain. However, since these initial findings were described, our understanding of both ends of the process (i.e. Ub-conjugation to proteins, and their recognition and degradation), have advanced significantly. This enabled us to start bridging the ends of this continuous process which suffered until lately from limited structural data regarding the 26S proteasomal architecture and the structure and diversity of the Ub chains. These missing pieces are of great importance because the link between ubiquitination and proteasomal processing is subject to numerous regulatory steps and are found to function improperly in several pathologies. Recently, the molecular architecture of the 26S proteasome was resolved in great detail, enabling us to address mechanistic questions regarding the various molecular events that polyubiquitinated (polyUb) substrates undergo during binding and processing by the 26S proteasome. In addition, advancement in analytical and synthetic methods enables us to better understand the structure and diversity of the degradation signal. The review summarizes these recent findings and addresses the extrapolated meanings in light of previous reports. Finally, it addresses some of the still remaining questions to be solved in order to obtain a continuous mechanistic view of the events that a substrate undergoes from its initial ubiquitination to proteasomal degradation. This article is part of a Special Issue entitled: Ubiquitin-Proteasome System. Guest Editors: Thomas Sommer and Dieter H. Wolf.
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Affiliation(s)
- Aaron Ciechanover
- The David and Janet Polak Cancer and Vascular Biology Research Center, The Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa 31096, Israel
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Expression of syndecan-4 and correlation with metastatic potential in testicular germ cell tumours. BIOMED RESEARCH INTERNATIONAL 2013; 2013:214864. [PMID: 23844358 PMCID: PMC3697279 DOI: 10.1155/2013/214864] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 05/28/2013] [Indexed: 01/11/2023]
Abstract
Although syndecan-4 is implicated in cancer progression, there is no information for its role in testicular germ cell tumours (TGCTs). Thus, we examined the expression of syndecan-4 in patients with TGCTs and its correlation with the clinicopathological findings. Immunohistochemical staining in 71 tissue specimens and mRNA analysis revealed significant overexpression of syndecan-4 in TGCTs. In seminomas, high percentage of tumour cells exhibited membranous and/or cytoplasmic staining for syndecan-4 in all cases. Stromal staining for syndecan-4 was found in seminomas and it was associated with nodal metastasis (P = 0.04), vascular/lymphatic invasion (P = 0.01), and disease stage (P = 0.04). Reduced tumour cell associated staining for syndecan-4 was observed in nonseminomatous germ cell tumours (NSGCTs) compared to seminomas. This loss of syndecan-4 was associated with nodal metastasis (P = 0.01), vascular/lymphatic invasion (P = 0.01), and disease stage (P = 0.01). Stromal staining for syndecan-4 in NSGCTs did not correlate with any of the clinicopathological variables. The stromal expression of syndecan-4 in TGCTs was correlated with microvessel density (P = 0.03). Our results indicate that syndecan-4 is differentially expressed in seminomas and NSGCTs and might be a useful marker. Stromal staining in seminomas and reduced levels of syndecan-4 in tumour cells in NSGCTs are related to metastatic potential, whereas stromal staining in TGCTs is associated with neovascularization.
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28
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Escobedo N, Contreras O, Muñoz R, Farías M, Carrasco H, Hill C, Tran U, Pryor SE, Wessely O, Copp AJ, Larraín J. Syndecan 4 interacts genetically with Vangl2 to regulate neural tube closure and planar cell polarity. Development 2013; 140:3008-17. [PMID: 23760952 PMCID: PMC3699283 DOI: 10.1242/dev.091173] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Syndecan 4 (Sdc4) is a cell-surface heparan sulfate proteoglycan (HSPG) that regulates gastrulation, neural tube closure and directed neural crest migration in Xenopus development. To determine whether Sdc4 participates in Wnt/PCP signaling during mouse development, we evaluated a possible interaction between a null mutation of Sdc4 and the loop-tail allele of Vangl2. Sdc4 is expressed in multiple tissues, but particularly in the non-neural ectoderm, hindgut and otic vesicles. Sdc4;Vangl2Lp compound mutant mice have defective spinal neural tube closure, disrupted orientation of the stereocilia bundles in the cochlea and delayed wound healing, demonstrating a strong genetic interaction. In Xenopus, co-injection of suboptimal amounts of Sdc4 and Vangl2 morpholinos resulted in a significantly greater proportion of embryos with defective neural tube closure than each individual morpholino alone. To probe the mechanism of this interaction, we overexpressed or knocked down Vangl2 function in HEK293 cells. The Sdc4 and Vangl2 proteins colocalize, and Vangl2, particularly the Vangl2Lp mutant form, diminishes Sdc4 protein levels. Conversely, Vangl2 knockdown enhances Sdc4 protein levels. Overall HSPG steady-state levels were regulated by Vangl2, suggesting a molecular mechanism for the genetic interaction in which Vangl2Lp/+ enhances the Sdc4-null phenotype. This could be mediated via heparan sulfate residues, as Vangl2Lp/+ embryos fail to initiate neural tube closure and develop craniorachischisis (usually seen only in Vangl2Lp/Lp) when cultured in the presence of chlorate, a sulfation inhibitor. These results demonstrate that Sdc4 can participate in the Wnt/PCP pathway, unveiling its importance during neural tube closure in mammalian embryos.
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Affiliation(s)
- Noelia Escobedo
- Center for Aging and Regeneration, Millennium Nucleus in Regenerative Biology, Faculty of Biological Sciences, P. Universidad Católica de Chile, Alameda 340 Santiago, Chile
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Abstract
30 years after the identification of WNTs, their signal transduction has become increasingly complex, with the discovery of more than 15 receptors and co-receptors in seven protein families. The recent discovery of three receptor classes for the R-spondin family of WNT agonists further adds to this complexity. What emerges is an intricate network of receptors that form higher-order ligand-receptor complexes routing downstream signalling. These are regulated both extracellularly by agonists such as R-spondin and intracellularly by post-translational modifications such as phosphorylation, proteolytic processing and endocytosis.
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Affiliation(s)
- Christof Niehrs
- Division of Molecular Embryology, DKFZ-ZMBH Alliance, DKFZ, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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30
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Kravtsova-Ivantsiv Y, Sommer T, Ciechanover A. The lysine48-based polyubiquitin chain proteasomal signal: not a single child anymore. Angew Chem Int Ed Engl 2012; 52:192-8. [PMID: 23124625 DOI: 10.1002/anie.201205656] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Indexed: 11/07/2022]
Abstract
The conjugation of ubiquitin (Ub) to proteins is involved in the regulation of many processes. The modification serves as a recognition element in trans, in which downstream effectors bind to the modified protein and determine its fate and/or function. A polyUb chain that is linked through internal lysine (Lys)-48 of Ub and anchored to an internal Lys residue of the substrate has become the accepted "canonical" signal for proteasomal targeting and degradation. However, recent studies show that the signal is far more diverse and that chains based on other internal linkages, as well as linear or heterologous chains made of Ub and Ub-like proteins and even monoUb, are recognized by the proteasome. In addition, chains linked to residues other than internal Lys were described, all challenging the current paradigm.
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Affiliation(s)
- Yelena Kravtsova-Ivantsiv
- Cancer and Vascular Biology Research Center, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
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31
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Han KJ, Foster DG, Zhang NY, Kanisha K, Dzieciatkowska M, Sclafani RA, Hansen KC, Peng J, Liu CW. Ubiquitin-specific protease 9x deubiquitinates and stabilizes the spinal muscular atrophy protein-survival motor neuron. J Biol Chem 2012; 287:43741-52. [PMID: 23112048 DOI: 10.1074/jbc.m112.372318] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Spinal muscular atrophy (SMA), the leading genetic disorder of infant mortality, is caused by low levels of survival motor neuron (SMN) protein. Currently it is not clear how the SMN protein levels are regulated at the post-transcriptional level. In this report, we find that Usp9x, a deubiquitinating enzyme, stably associates with the SMN complex via directly interacting with SMN. Usp9x deubiquitinates SMN that is mostly mono- and di-ubiquitinated. Knockdown of Usp9x promotes SMN degradation and reduces the protein levels of SMN and the SMN complex in cultured mammalian cells. Interestingly, Usp9x does not deubiquitinate nuclear SMNΔ7, the main protein product of the SMN2 gene, which is polyubiquitinated and rapidly degraded by the proteasome. Together, our results indicate that SMN and SMNΔ7 are differently ubiquitinated; Usp9x plays an important role in stabilizing SMN and the SMN complex, likely via antagonizing Ub-dependent SMN degradation.
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Affiliation(s)
- Ke-Jun Han
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado 80045, USA
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Shabek N, Herman-Bachinsky Y, Buchsbaum S, Lewinson O, Haj-Yahya M, Hejjaoui M, Lashuel H, Sommer T, Brik A, Ciechanover A. The Size of the Proteasomal Substrate Determines Whether Its Degradation Will Be Mediated by Mono- or Polyubiquitylation. Mol Cell 2012; 48:87-97. [DOI: 10.1016/j.molcel.2012.07.011] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/04/2012] [Accepted: 07/09/2012] [Indexed: 11/28/2022]
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Kravtsova-Ivantsiv Y, Ciechanover A. Non-canonical ubiquitin-based signals for proteasomal degradation. J Cell Sci 2012; 125:539-48. [PMID: 22389393 DOI: 10.1242/jcs.093567] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Regulated cellular proteolysis is mediated largely by the ubiquitin-proteasome system (UPS). It is a highly specific process that is time- (e.g. cell cycle), compartment- (e.g. nucleus or endoplasmic reticulum) and substrate quality- (e.g. denatured or misfolded proteins) dependent, and allows fast adaptation to changing conditions. Degradation by the UPS is carried out through two successive steps: the substrate is covalently tagged with ubiquitin and subsequently degraded by the 26S proteasome. The accepted 'canonical' signal for proteasomal recognition is a polyubiquitin chain that is anchored to a lysine residue in the target substrate, and is assembled through isopeptide bonds involving lysine 48 of ubiquitin. However, several 'non-canonical' ubiquitin-based signals for proteasomal targeting have also been identified. These include chains anchored to residues other than internal lysine in the substrates, chains assembled through linking residues other than lysine 48 in ubiquitin, and mixed chains made of both ubiquitin and a ubiquitin-like protein. Furthermore, some proteins can be degraded following modification by a single ubiquitin (monoubiquitylation) or multiple single ubiquitins (multiple monoubiquitylation). Finally, some proteins can be proteasomally degraded without prior ubiquitylation (the process is also often referred to as ubiquitination). In this Commentary, we describe these recent findings and discuss the possible physiological roles of these diverse signals. Furthermore, we discuss the possible impact of this signal diversity on drug development.
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Affiliation(s)
- Yelena Kravtsova-Ivantsiv
- Cancer and Vascular Biology Research Center, The Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Efron Street, Bat Galim, PO Box 9649, Haifa 31096, Israel.
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Chung KW, Kim SW, Kim SW. Gene expression profiling of papillary thyroid carcinomas in Korean patients by oligonucleotide microarrays. JOURNAL OF THE KOREAN SURGICAL SOCIETY 2012; 82:271-80. [PMID: 22563533 PMCID: PMC3341475 DOI: 10.4174/jkss.2012.82.5.271] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Revised: 03/15/2012] [Accepted: 03/21/2012] [Indexed: 12/12/2022]
Abstract
Purpose The incidence of papillary thyroid carcinomas (PTCs) is rapidly increasing in Korea. Analyzing the gene expression profiling (GEP) of PTCs will facilitate the advent of new methods in diagnosis, prognostication, and treatment. We performed this study to find the GEP of Korean PTCs. Methods We performed oligonucleotide microarray analysis with 19 PTCs and 7 normal thyroid glands. Differentially expressed genes were selected using a t-test (|fold| >3) and adjusted Benjamini-Hochberg false discovery rate P-value < 0.01. Quantitative reverse transcription-polymerase chain reaction (QRT-PCR) was used to validate microarray data. A classification model was developed by support vector machine (SVM) algorithm to diagnose PTCs based on molecular signatures. Results We identified 79 differentially expressed genes (70 up-regulated and 9 down-regulated) according to the criteria. QRT-PCR for five genes (CDH3, NGEF, PROS1, TGFA, MET) was confirmatory of the microarray data. Hierarchical cluster analysis and a classification model by the SVM algorithm accurately differentiated PTCs from normal thyroid gland based on GEP. Conclusion A disease classification model showed excellent accuracy in diagnosing PTCs, thus showing the possibility of molecular diagnosis in the future. This GEP could serve as baseline data for further investigation in the management of PTCs based on molecular signatures.
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Affiliation(s)
- Ki-Wook Chung
- Center for Thyroid Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
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Abstract
Genetic studies of Wnt11 have revealed many insights into the roles and regulation of Wnt11, particularly during development. New tools to study Wnt11 have recently become available, making it timely to review the literature regarding this unique Wnt family member. In this study, we focus on mammalian Wnt11, describing its main sites of expression during development, and how the Wnt11 gene is regulated. We highlight an emerging theme in which canonical Wnt signals regulate Wnt11 expression through transcription factors in addition to, or other than, Tcf/LEF family members. We also discuss the frizzled family and other receptors that bind to Wnt11, the intracellular kinases and small GTPases that act downstream of Wnt11, and the effects of Wnt11 on Wnt/β-catenin signalling. Finally, we elaborate on the relevance of Wnt11 to human cancer, where it appears to be important both for proliferation and/or survival during normal differentiation and for migration/invasion.
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Affiliation(s)
- P Uysal-Onganer
- Department of Surgery and Cancer, Imperial College London, UK
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36
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Rajesh S, Bago R, Odintsova E, Muratov G, Baldwin G, Sridhar P, Rajesh S, Overduin M, Berditchevski F. Binding to syntenin-1 protein defines a new mode of ubiquitin-based interactions regulated by phosphorylation. J Biol Chem 2011; 286:39606-14. [PMID: 21949238 PMCID: PMC3234783 DOI: 10.1074/jbc.m111.262402] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 09/22/2011] [Indexed: 11/06/2022] Open
Abstract
Syntenin-1 is a PDZ domain-containing adaptor that controls trafficking of transmembrane proteins including those associated with tetraspanin-enriched microdomains. We describe the interaction of syntenin-1 with ubiquitin through a novel binding site spanning the C terminus of ubiquitin, centered on Arg(72), Leu(73), and Arg(74). A conserved LYPSL sequence in the N terminus, as well as the C-terminal region of syntenin-1, are essential for binding to ubiquitin. We present evidence for the regulation of this interaction through syntenin-1 dimerization. We have also established that syntenin-1 is phosphorylated downstream of Ulk1, a serine/threonine kinase that plays a critical role in autophagy and regulates endocytic trafficking. Importantly, Ulk1-dependent phosphorylation of Ser(6) in the LYPSL prevents the interaction of syntenin-1 with ubiquitin. These results define an unprecedented ubiquitin-dependent pathway involving syntenin-1 that is regulated by Ulk1.
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Affiliation(s)
- Sundaresan Rajesh
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Ružica Bago
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Elena Odintsova
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Gayrat Muratov
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Gouri Baldwin
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Pooja Sridhar
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Sandya Rajesh
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Michael Overduin
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Fedor Berditchevski
- From the School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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O'Connell MP, Weeraratna AT. A spoonful of sugar makes the melanoma go: the role of heparan sulfate proteoglycans in melanoma metastasis. Pigment Cell Melanoma Res 2011; 24:1133-47. [PMID: 21978367 DOI: 10.1111/j.1755-148x.2011.00918.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heparan sulfate proteoglycans (HSPGs) have been shown to regulate signaling in many systems and are of increasing interest in cancer. While these are not the only sugars to drive melanoma metastasis, HSPGs play important roles in driving metastatic signaling cascades in melanoma. The ability of these proteins to modulate ligand-receptor interactions in melanoma has been quite understudied. Recent data from several groups indicate the importance of these ligands in modulating key signaling pathways including Wnt and fibroblast growth factor (FGF) signaling. In this review, we summarize the current knowledge regarding the structure and function of these proteoglycans and their role in melanoma. Understanding how HSPGs modulate signaling in melanoma could lead to new therapeutic approaches via the dampening or heightening of key signaling pathways.
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Affiliation(s)
- M P O'Connell
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA.
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38
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Ohkawara B, Glinka A, Niehrs C. Rspo3 binds syndecan 4 and induces Wnt/PCP signaling via clathrin-mediated endocytosis to promote morphogenesis. Dev Cell 2011; 20:303-14. [PMID: 21397842 DOI: 10.1016/j.devcel.2011.01.006] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 10/24/2010] [Accepted: 12/22/2010] [Indexed: 11/26/2022]
Abstract
The R-Spondin (Rspo) family of secreted Wnt modulators is involved in development and disease and holds therapeutic promise as stem cell growth factors. Despite growing biological importance, their mechanism of action is poorly understood. Here, we show that Rspo3 binds syndecan 4 (Sdc4) and that together they activate Wnt/PCP signaling. In Xenopus embryos, Sdc4 and Rspo3 are essential for two Wnt/PCP-driven processes-gastrulation movements and head cartilage morphogenesis. Rspo3/PCP signaling during gastrulation requires Wnt5a and is transduced via Fz7, Dvl, and JNK. Rspo3 functions by inducing Sdc4-dependent, clathrin-mediated endocytosis. We show that this internalization is essential for PCP signal transduction, suggesting that endocytosis of Wnt-receptor complexes is a key mechanism by which R-spondins promote Wnt signaling.
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Affiliation(s)
- Bisei Ohkawara
- Division of Molecular Embryology, DKFZ-ZMBH Alliance, German Cancer Research Center, Im Neuenheimer Feld 581, Heidelberg, Germany
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