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Barricklow Z, DiVincenzo MJ, Angell CD, Carson WE. Ulcerated Cutaneous Melanoma: A Review of the Clinical, Histologic, and Molecular Features Associated with a Clinically Aggressive Histologic Phenotype. CLINICAL, COSMETIC AND INVESTIGATIONAL DERMATOLOGY 2022; 15:1743-1757. [PMID: 36065342 PMCID: PMC9440663 DOI: 10.2147/ccid.s372287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 08/02/2022] [Indexed: 12/05/2022]
Abstract
The presence of ulceration in melanoma is associated with poor clinical outcomes and is the third most powerful predictor of survival in the AJCC Melanoma Staging System after tumor thickness and mitotic activity. The aggressive biological behavior associated with ulceration has been hypothesized to be the result of an intrinsic biological attribute that favors dissemination and presents locally with the loss of epidermal integrity. Among the features of ulcerated melanoma, many show promise as potential prognostic tools, markers of differential immunogenicity and indicators of oncogenic drivers of invasion and metastasis. The incidence of ulcerated melanoma is greater in males, increases with age and with systemic inflammatory risk factors (diabetes, smoking, low vitamin D, elevated body mass index). Patients with ulcerated primary tumors seem to exclusively benefit from adjuvant interferon (IFN) therapy, which is likely the consequence of an altered tumor microenvironment. When ulceration is present, there is a higher density of macrophages and dendritic cells and enhanced expression of pro-inflammatory cytokines, such as IL-6. There is also an increased expression of proteins involved in tumor antigen presentation in ulcerated melanomas. Histologically, vascular density, vasculogenic mimicry and angiotropism are all significantly correlated with ulceration in melanoma. The presence of ulceration is associated with reduced protein expression of E-cadherin and PTEN and elevated levels of N-cadherin and the matrix metalloproteinases. Differential microRNA expression also holds promise as a potential prognostic biomarker of malignancy and disease spread within the setting of ulceration. However, the molecular and cellular differences associated with the ulcerated state are complex and further study will aid in determining how these differences can be harnessed to improve care for patients with melanoma.
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Affiliation(s)
- Zoe Barricklow
- The Arthur G. James Cancer Hospital and Solove Research Institute, The Ohio, State University, Columbus, OH, USA
| | - Mallory J DiVincenzo
- The Arthur G. James Cancer Hospital and Solove Research Institute, The Ohio, State University, Columbus, OH, USA
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, USA
| | - Colin D Angell
- The Arthur G. James Cancer Hospital and Solove Research Institute, The Ohio, State University, Columbus, OH, USA
| | - William E Carson
- The Arthur G. James Cancer Hospital and Solove Research Institute, The Ohio, State University, Columbus, OH, USA
- Correspondence: William E Carson, The Ohio State University, N924 Doan Hall, 410 W. 10th Avenue, Columbus, OH, 43210, USA, Tel +1 614 293-6306, Fax +2 614 293-3465, Email
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miR-590-5p Targets Skp2 to Inhibit the Growth and Invasion of Malignant Melanoma Cells. DISEASE MARKERS 2022; 2022:8723725. [PMID: 35845132 PMCID: PMC9282986 DOI: 10.1155/2022/8723725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 05/16/2022] [Indexed: 11/18/2022]
Abstract
Skp2 participates in the regulation of cell growth cycle and promotes the growth of tumor cells. It was speculated that miR-590-5p could regulate the expression of Skp2 and have therapeutic effects on malignant melanin. In this study, the expression of Skp2 was detected by qRT-PCR and Western blot (WB), and the targeted binding between miR-590-5p and Skp2 was verified by dual luciferase reporting assay. Subsequently, cell proliferation activity was detected by CCK8, cell invasion was detected by Transwell, and cell apoptosis was detected by mitochondrial membrane potential assay. The results indicate that Skp2 is highly expressed in melanoma cells and inhibits the proliferation and invasion of melanoma cells. However, miR-590-5p can bind to Skp2 in a targeted manner. miR-590-5p is underexpressed in melanoma cells, and its overexpression can inhibit Skp2 expression and proliferation and invasion of melanoma cells. Our results showed that miR-590-5p could inhibit melanoma cell development by targeting Skp2. This study provides more therapeutic targets for the treatment of melanoma.
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Wang M, Banik I, Shain AH, Yeh I, Bastian BC. Integrated genomic analyses of acral and mucosal melanomas nominate novel driver genes. Genome Med 2022; 14:65. [PMID: 35706047 PMCID: PMC9202124 DOI: 10.1186/s13073-022-01068-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 06/03/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Acral and mucosal melanomas are aggressive subtypes of melanoma, which have a significantly lower burden of somatic mutations than cutaneous melanomas, but more frequent copy number variations, focused gene amplifications, and structural alterations. The landscapes of their genomic alterations remain to be fully characterized. METHODS We compiled sequencing data of 240 human acral and mucosal melanoma samples from 11 previously published studies and applied a uniform pipeline to call tumor cell content, ploidy, somatic and germline mutations, as well as CNVs, LOH, and SVs. We identified genes that are significantly mutated or recurrently affected by CNVs and implicated in oncogenesis. We further examined the difference in the frequency of recurrent pathogenic alterations between the two melanoma subtypes, correlation between pathogenic alterations, and their association with clinical features. RESULTS We nominated PTPRJ, mutated and homozygously deleted in 3.8% (9/240) and 0.8% (2/240) of samples, respectively, as a probable tumor suppressor gene, and FER and SKP2, amplified in 3.8% and 11.7% of samples, respectively, as probable oncogenes. We further identified a long tail of infrequent pathogenic alterations, involving genes such as CIC and LZTR1. Pathogenic germline mutations were observed on MITF, PTEN, ATM, and PRKN. We found BRAF V600E mutations in acral melanomas with fewer structural variations, suggesting that they are distinct and related to cutaneous melanomas. Amplifications of PAK1 and GAB2 were more commonly observed in acral melanomas, whereas SF3B1 R625 codon mutations were unique to mucosal melanomas (12.9%). Amplifications at 11q13-14 were frequently accompanied by fusion to a region on chromosome 6q12, revealing a recurrent novel structural rearrangement whose role remains to be elucidated. CONCLUSIONS Our meta-analysis expands the catalog of driver mutations in acral and mucosal melanomas, sheds new light on their pathogenesis and broadens the catalog of therapeutic targets for these difficult-to-treat cancers.
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Affiliation(s)
- Meng Wang
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Ishani Banik
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - A Hunter Shain
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Iwei Yeh
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA.
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA.
| | - Boris C Bastian
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA.
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA.
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4
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Holmes TR, Dindu S, Hansen LA. Aberrant localization of signaling proteins in skin cancer: Implications for treatment. Mol Carcinog 2019; 58:1631-1639. [PMID: 31062427 DOI: 10.1002/mc.23036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 01/01/2023]
Abstract
Aberrant subcellular localization of signaling proteins can provide cancer cells with advantages such as resistance to apoptotic cell death, increased invasiveness and more rapid proliferation. Nuclear to cytoplasmic shifts in tumor-promoting proteins can lead to worse patient outcomes, providing opportunities to target cancer-specific processes. Herein, we review the significance of dysregulated protein localization with a focus on skin cancer. Altered localization of signaling proteins controlling cell cycle progression or cell death is a common feature of cancer. In some instances, aberrant subcellular localization results in an acquired prosurvival function. Taking advantage of this knowledge reveals novel targets useful in the development of cancer therapeutics.
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Affiliation(s)
- Thomas R Holmes
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
| | - Shravya Dindu
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
| | - Laura A Hansen
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska
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5
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Pratheeshkumar P, Siraj AK, Divya SP, Parvathareddy SK, Begum R, Melosantos R, Al-Sobhi SS, Al-Dawish M, Al-Dayel F, Al-Kuraya KS. Downregulation of SKP2 in Papillary Thyroid Cancer Acts Synergistically With TRAIL on Inducing Apoptosis via ROS. J Clin Endocrinol Metab 2018; 103:1530-1544. [PMID: 29300929 DOI: 10.1210/jc.2017-02178] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/21/2017] [Indexed: 02/09/2023]
Abstract
CONTEXT AND OBJECTIVE S-phase kinase protein 2 (SKP2) is an F-box protein with proteasomal properties and has been found to be overexpressed in a variety of cancers. However, its role in papillary thyroid cancer (PTC) has not been fully elucidated. EXPERIMENTAL DESIGN SKP2 expression was assessed by immunohistochemistry in a tissue microarray format on a cohort of >1000 PTC samples. In vitro and in vivo studies were performed using proteasome inhibitor bortezomib and proapoptopic death ligand tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) either alone or in combination on PTC cell lines. RESULTS SKP2 was overexpressed in 45.5% of PTC cases and was significantly associated with extrathyroidal extension (P = 0.0451), distant metastasis (P = 0.0435), and tall cell variant (P = 0.0271). SKP2 overexpression was also directly associated with X-linked inhibitor of apoptosis protein overexpression (P < 0.0001) and Bcl-xL overexpression (P = 0.0005) and inversely associated with death receptor 5 (P < 0.0001). The cotreatment of bortezomib and TRAIL synergistically induced apoptosis via mitochondrial apoptotic pathway in PTC cell lines. Furthermore, bortezomib and TRAIL synergistically induced reactive oxygen species (ROS) generation and caused death receptor 5 upregulation through activation of the extracellular signal-regulated kinase-C/EBP homologous protein signaling cascade. Finally, bortezomib treatment augmented the TRAIL-mediated anticancer effect on PTC xenograft tumor growth in nude mice. CONCLUSION These data suggest that SKP2 is a potential therapeutic target in PTC and that a combination of bortezomib and TRAIL might be a viable therapeutic option for the treatment of patients with aggressive PTC.
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Affiliation(s)
- Poyil Pratheeshkumar
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Abdul K Siraj
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Sasidharan Padmaja Divya
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | | | - Rafia Begum
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Roxanne Melosantos
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Saif S Al-Sobhi
- Department of Surgery, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Mohammed Al-Dawish
- Department of Diabetes and Endocrinology, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Fouad Al-Dayel
- Department of Pathology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Khawla S Al-Kuraya
- Human Cancer Genomic Research, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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6
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Del Castillo Velasco‐Herrera M, van der Weyden L, Nsengimana J, Speak AO, Sjöberg MK, Bishop DT, Jönsson G, Newton‐Bishop J, Adams DJ. Comparative genomics reveals that loss of lunatic fringe (LFNG) promotes melanoma metastasis. Mol Oncol 2018; 12:239-255. [PMID: 29193607 PMCID: PMC5792739 DOI: 10.1002/1878-0261.12161] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/16/2017] [Accepted: 11/07/2017] [Indexed: 12/17/2022] Open
Abstract
Metastasis is the leading cause of death in patients with advanced melanoma, yet the somatic alterations that aid tumour cell dissemination and colonisation are poorly understood. Here, we deploy comparative genomics to identify and validate clinically relevant drivers of melanoma metastasis. To do this, we identified a set of 976 genes whose expression level was associated with a poor outcome in patients from two large melanoma cohorts. Next, we characterised the genomes and transcriptomes of mouse melanoma cell lines defined as weakly metastatic, and their highly metastatic derivatives. By comparing expression data between species, we identified lunatic fringe (LFNG), among 28 genes whose expression level is predictive of poor prognosis and whose altered expression is associated with a prometastatic phenotype in mouse melanoma cells. CRISPR/Cas9-mediated knockout of Lfng dramatically enhanced the capability of weakly metastatic melanoma cells to metastasise in vivo, a phenotype that could be rescued with the Lfng cDNA. Notably, genomic alterations disrupting LFNG are found exclusively in human metastatic melanomas sequenced as part of The Cancer Genome Atlas. Using comparative genomics, we show that LFNG expression plays a functional role in regulating melanoma metastasis.
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Affiliation(s)
| | | | - Jeremie Nsengimana
- Leeds Institute of Cancer and PathologySt James's University HospitalUniversity of LeedsUK
| | - Anneliese O. Speak
- Experimental Cancer GeneticsWellcome Trust Sanger InstituteHinxtonCambridgeUK
| | - Marcela K. Sjöberg
- Experimental Cancer GeneticsWellcome Trust Sanger InstituteHinxtonCambridgeUK
- Departamento de Biología Celular y MolecularFacultad de Ciencias BiológicasPontificia Universidad Católica de ChileSantiagoChile
| | - David Timothy Bishop
- Leeds Institute of Cancer and PathologySt James's University HospitalUniversity of LeedsUK
| | - Göran Jönsson
- Division of Oncology and PathologyDepartment of Clinical SciencesSkåne University HospitalLund UniversitySweden
| | - Julia Newton‐Bishop
- Leeds Institute of Cancer and PathologySt James's University HospitalUniversity of LeedsUK
| | - David J. Adams
- Experimental Cancer GeneticsWellcome Trust Sanger InstituteHinxtonCambridgeUK
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7
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Ouyang J, Xu H, Li M, Dai X, Fu F, Zhang X, Lan Q. Paeoniflorin exerts antitumor effects by inactivating S phase kinase-associated protein 2 in glioma cells. Oncol Rep 2017; 39:1052-1062. [PMID: 29286139 PMCID: PMC5802027 DOI: 10.3892/or.2017.6175] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022] Open
Abstract
Paeoniflorin (PF), a natural compound isolated from Paeoniae radix, has been shown to exert antitumor effects in various types of human cancers including glioma. However, the mechanism of action is not well understood. S-phase kinase-associated protein (Skp)2 functions as an oncogene in many cancers. In the present study, we investigated whether Skp2 mediates the anti-glioma activity of PF. We found that PF inhibited glioma cell proliferation, migration and invasion, and induced G2/M arrest and apoptosis. Skp2 expression was downregulated in glioma cells treated with PF. PF-induced antitumor effects in glioma cells were abolished by Skp2 overexpression but were enhanced by RNA interference of Skp2. Moreover, PF treatment inhibited U87 cell-derived tumor growth in a xenograft mouse model. These results demonstrate that PF exerts its antitumor effects in part by inhibiting Skp2 expression in glioma cells and could be a promising therapeutic agent for glioma therapy.
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Affiliation(s)
- Jia Ouyang
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Hui Xu
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Ming Li
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Xingliang Dai
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Fengqing Fu
- Clinical Immunology Institute, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Xueguang Zhang
- Clinical Immunology Institute, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Qing Lan
- Department of Neurosurgery, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
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8
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Wang JY, Liu GZ, Wilmott JS, La T, Feng YC, Yari H, Yan XG, Thorne RF, Scolyer RA, Zhang XD, Jin L. Skp2-Mediated Stabilization of MTH1 Promotes Survival of Melanoma Cells upon Oxidative Stress. Cancer Res 2017; 77:6226-6239. [PMID: 28947420 DOI: 10.1158/0008-5472.can-17-1965] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/18/2017] [Accepted: 09/18/2017] [Indexed: 11/16/2022]
Abstract
MTH1 helps prevent misincorporation of ROS-damaged dNTPs into genomic DNA; however, there is little understanding of how MTH1 itself is regulated. Here, we report that MTH1 is regulated by polyubiquitination mediated by the E3 ligase Skp2. In melanoma cells, MTH1 was upregulated commonly mainly due to its improved stability caused by K63-linked polyubiquitination. Although Skp2 along with other components of the Skp1-Cullin-F-box (SCF) ubiquitin ligase complex was physically associated with MTH1, blocking the SCF function ablated MTH1 ubiquitination and expression. Conversely, overexpressing Skp2-elevated levels of MTH1 associated with an increase in its K63-linked ubiquitination. In melanoma cell lines and patient specimens, we observed a positive correlation of Skp2 and MTH1 expression. Mechanistic investigations showed that Skp2 limited DNA damage and apoptosis triggered by oxidative stress and that MAPK upregulated Skp2 and MTH1 to render cells more resistant to such stress. Collectively, our findings identify Skp2-mediated K63-linked polyubiquitination as a critical regulatory mechanism responsible for MTH1 upregulation in melanoma, with potential implications to target the MAPK/Skp2/MTH1 pathway to improve its treatment. Cancer Res; 77(22); 6226-39. ©2017 AACR.
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Affiliation(s)
- Jia Yu Wang
- Translational Research Institute, Henan Provincial People's Hospital, Henan, China.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Guang Zhi Liu
- Translational Research Institute, Henan Provincial People's Hospital, Henan, China
| | - James S Wilmott
- Discipline of Pathology, The University of Sydney, and Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Ting La
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Yu Chen Feng
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Hamed Yari
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Xu Guang Yan
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Rick F Thorne
- Translational Research Institute, Henan Provincial People's Hospital, Henan, China.,School of Environmental and Life Sciences, The University of Newcastle, New South Wales, Australia
| | - Richard A Scolyer
- Discipline of Pathology, The University of Sydney, and Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Xu Dong Zhang
- Translational Research Institute, Henan Provincial People's Hospital, Henan, China. .,School of Biomedical Sciences and Pharmacy, The University of Newcastle, New South Wales, Australia
| | - Lei Jin
- Translational Research Institute, Henan Provincial People's Hospital, Henan, China. .,School of Medicine and Public Health, The University of Newcastle, New South Wales, Australia
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9
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Ding L, Li R, Han X, Zhou Y, Zhang H, Cui Y, Wang W, Bai J. Inhibition of Skp2 suppresses the proliferation and invasion of osteosarcoma cells. Oncol Rep 2017. [PMID: 28627672 DOI: 10.3892/or.2017.5713] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Osteosarcoma (OS) is a common bone tumor that mainly affects children and young adults. S-phase kinase‑associated protein 2 (Skp2) has been characterized to play a critical oncogenic role in a variety of human malignancies. However, the biological function of Skp2 in OS remains largely obscure. In the present study, we elucidated the role of Skp2 in cell growth, cell cycle, apoptosis and migration in OS cells. We found that depletion of Skp2 inhibited cell growth in both MG-63 and SW 1353 cells. Moreover, we observed that depletion of Skp2 triggered cell apoptosis in two OS cell lines. Furthermore, downregulation of Skp2 induced cell cycle arrest in the G0/G1 phase in OS cells. Notably, our wound healing assay results revealed that inhibition of Skp2 suppressed cell migration in OS cells. Invariably, our western blot results demonstrated that depletion of Skp2 in OS cells inhibited activation of pAkt and increased p27 expression in OS cells, suggesting that Skp2 exerted its oncogenic function partly through the regulation of Akt and p27. Our findings revealed that targeting Skp2 could be a promising therapeutic strategy for the treatment of OS.
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Affiliation(s)
- Lu Ding
- Department of Orthopedics, Tumor Hospital Affiliated to Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Rong Li
- Department of Maternal, Child and Adolescent Health, College of Public Health, Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Xiaoping Han
- Department of Orthopedics, Fifth Affiliated Hospital, Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Yubo Zhou
- Department of Orthopedics, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, Xinshi, Urumqi, Xinjiang, P.R. China
| | - Hua Zhang
- Department of Orthopedics, Fifth Affiliated Hospital, Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Yong Cui
- Department of Orthopedics, Fifth Affiliated Hospital, Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Wu Wang
- Department of Orthopedics, Fifth Affiliated Hospital, Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
| | - Jingping Bai
- Department of Orthopedics, Tumor Hospital Affiliated to Xinjiang Medical University, Xinshi, Urumqi, Xinjiang 830000, P.R. China
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10
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Ma J, Guo W, Li C. Ubiquitination in melanoma pathogenesis and treatment. Cancer Med 2017; 6:1362-1377. [PMID: 28544818 PMCID: PMC5463089 DOI: 10.1002/cam4.1069] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/07/2017] [Accepted: 03/10/2017] [Indexed: 12/13/2022] Open
Abstract
Melanoma is one of the most aggressive skin cancers with fiercely increasing incidence and mortality. Since the progressive understanding of the mutational landscape and immunologic pathogenic factors in melanoma, the targeted therapy and immunotherapy have been recently established and gained unprecedented improvements for melanoma treatment. However, the prognosis of melanoma patients remains unoptimistic mainly due to the resistance and nonresponse to current available drugs. Ubiquitination is a posttranslational modification which plays crucial roles in diverse cellular biological activities and participates in the pathogenesis of various cancers, including melanoma. Through the regulation of multiple tumor promoters and suppressors, ubiquitination is emerging as the key contributor and therefore a potential therapeutic target for melanoma. Herein, we summarize the current understanding of ubiquitination in melanoma, from mechanistic insights to clinical progress, and discuss the prospect of ubiquitination modification in melanoma treatment.
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Affiliation(s)
- Jinyuan Ma
- Department of Dermatology, Xijing hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Weinan Guo
- Department of Dermatology, Xijing hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Chunying Li
- Department of Dermatology, Xijing hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
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11
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Zheng N, Zhou Q, Wang Z, Wei W. Recent advances in SCF ubiquitin ligase complex: Clinical implications. Biochim Biophys Acta Rev Cancer 2016; 1866:12-22. [PMID: 27156687 DOI: 10.1016/j.bbcan.2016.05.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 12/09/2022]
Abstract
F-box proteins, which are subunit recruiting modules of SCF (SKP1-Cullin 1-F-box protein) E3 ligase complexes, play critical roles in the development and progression of human malignancies through governing multiple cellular processes including cell proliferation, apoptosis, invasion and metastasis. Moreover, there are emerging studies that lead to the development of F-box proteins inhibitors with promising therapeutic potential. In this article, we describe how F-box proteins including but not restricted to well-established Fbw7, Skp2 and β-TRCP, are involved in tumorigenesis. However, in-depth investigation is required to further explore the mechanism and the physiological contribution of undetermined F-box proteins in carcinogenesis. Lastly, we suggest that targeting F-box proteins could possibly open new avenues for the treatment and prevention of human cancers.
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Affiliation(s)
- Nana Zheng
- The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, the First Affiliated Hospital, Soochow University, Suzhou 215123, China
| | - Quansheng Zhou
- The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, the First Affiliated Hospital, Soochow University, Suzhou 215123, China
| | - Zhiwei Wang
- The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, the First Affiliated Hospital, Soochow University, Suzhou 215123, China; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, MA 02215, USA.
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, MA 02215, USA.
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12
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Chen L, Liu T, Tu Y, Rong D, Cao Y. Cul1 promotes melanoma cell proliferation by promoting DEPTOR degradation and enhancing cap-dependent translation. Oncol Rep 2015; 35:1049-56. [PMID: 26717892 DOI: 10.3892/or.2015.4442] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 09/15/2015] [Indexed: 11/06/2022] Open
Abstract
Cullin1 (Cul1) serves as a rigid scaffold in the SCF (Skp1/Cullin/Rbx1/F-box protein) E3 ubiquitin ligase complex and has been found to be overexpressed in melanoma and to enhance melanoma cell proliferation by promoting G1-S phase transition. However, the underlying mechanisms involved in the regulation of melanoma cell proliferation by Cul1 remain poorly understood. In the present study, we found that Cul1 promoted mTORC1 activity and cap-dependent translation by enhancing the ubiquitination and degradation of DEPTOR. We further showed that suppression of the eIF4F complex assembly profoundly inhibited the promoting effect of Cul1 on melanoma cell proliferation, while enhancement of the eIF4F complex activity reversed the inhibitory effect of Cul1 depletion on melanoma cell proliferation, indicating that Cul1 contributes to melanoma cell proliferation by activating cap‑dependent translation. These data elucidate the role of Cul1 in cap-dependent translation and improves our understanding of the underlying mechanisms involved in the regulation of melanoma cell proliferation by Cul1.
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Affiliation(s)
- Lan Chen
- Department of Dermatology, The Affiliated Hospital of Guiyang Medical University, Guiyang, Guizhou 550004, P.R. China
| | - Tianyu Liu
- Department of Dermatology, The Affiliated Hospital of Guiyang Medical University, Guiyang, Guizhou 550004, P.R. China
| | - Yunhua Tu
- Department of Dermatology, The Affiliated Hospital of Guiyang Medical University, Guiyang, Guizhou 550004, P.R. China
| | - Dongyun Rong
- Department of Dermatology, The Affiliated Hospital of Guiyang Medical University, Guiyang, Guizhou 550004, P.R. China
| | - Yu Cao
- Department of Dermatology, The Affiliated Hospital of Guiyang Medical University, Guiyang, Guizhou 550004, P.R. China
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Bielskienė K, Bagdonienė L, Mozūraitienė J, Kazbarienė B, Janulionis E. E3 ubiquitin ligases as drug targets and prognostic biomarkers in melanoma. MEDICINA-LITHUANIA 2015; 51:1-9. [PMID: 25744769 DOI: 10.1016/j.medici.2015.01.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 01/18/2015] [Indexed: 12/30/2022]
Abstract
Melanomas are highly proliferative and invasive, and are most frequently metastatic. Despite many advances in cancer treatment over the last several decades, the prognosis for patients with advanced melanoma remains poor. New treatment methods and strategies are necessary. The main hallmark of cancer is uncontrolled cellular proliferation with alterations in the expression of proteins. Ubiquitin and ubiquitin-related proteins posttranslationally modify proteins and thereby alter their functions. The ubiquitination process is involved in various physiological responses, including cell growth, cell death, and DNA damage repair. E3 ligases, the most specific enzymes of ubiquitination system, participate in the turnover of many key regulatory proteins and in the development of cancer. E3 ligases are of interest as drug targets for their ability to regulate proteins stability and functions. Compared to the general proteasome inhibitor bortezomib, which blocks the entire protein degradation, drugs that target a particular E3 ligase are expected to have better selectivity with less associated toxicity. Components of different E3 ligases complexes (FBW7, MDM2, RBX1/ROC1, RBX2/ROC2, cullins and many others) are known as oncogenes or tumor suppressors in melanomagenesis. These proteins participate in regulation of different cellular pathways and such important proteins in cancer development as p53 and Notch. In this review we summarized published data on the role of known E3 ligases in the development of melanoma and discuss the inhibitors of E3 ligases as a novel approach for the treatment of malignant melanomas.
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Affiliation(s)
| | - Lida Bagdonienė
- Department of Biochemistry and Molecular Biology, Vilnius University, Vilnius, Lithuania.
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Lu H, Gan M, Cao X, Chen L, Yang Z, Hu W. RNAi-mediated silencing of the Skp-2 gene causes inhibition of growth and induction of apoptosis in human renal carcinoma cells. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:3845-3852. [PMID: 25120761 PMCID: PMC4128996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 06/24/2014] [Indexed: 06/03/2023]
Abstract
Renal cancer ranks one of the most frequent causes of cancer death in the world. S-phase kinase-associated protein 2 (SKP 2) is overexpressed in human tumors and has prognostic value in many cancers including renal cancer, indicating its potential as a therapeutic target. In this study, we investigated the therapeutic potential of Skp-2 in renal cancer using the technique of RNA silencing via short hairpin RNA (shRNA). Synthetic shRNA duplexes against Skp-2 were introduced to down-regulate the expression of Skp-2 in a highly malignant renal carcinoma cell line, ACHN. The results indicated that siRNA targeting of Skp-2 could lead to an efficient and specific inhibition of endogenous Skp-2 activity. Furthermore, we found that depletion of Skp-2 caused a dramatic cell cycle arrest, followed by massive apoptotic cell death, and eventually resulted in a significant decrease in growth, viability and tumor formation in renal cancer cell lines studied.
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Affiliation(s)
- Hongsheng Lu
- Department of Pathology, Taizhou Central Hospital of Taizhou Enze Medical GroupTaizhou, China
| | - Meifu Gan
- Department of Pathology, Taizhou Hospital of Taizhou Enze Medical GroupLinhai, China
| | - Xuequan Cao
- Department of Pathology, Taizhou Central Hospital of Taizhou Enze Medical GroupTaizhou, China
| | - Lanxi Chen
- Department of Pathology, Taizhou Central Hospital of Taizhou Enze Medical GroupTaizhou, China
| | - Zhaohui Yang
- Department of Pathology, Taizhou Central Hospital of Taizhou Enze Medical GroupTaizhou, China
| | - Wei Hu
- Department of Radiation Oncology, Taizhou Central Hospital of Taizhou Enze Medical GroupTaizhou, China
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Bhandaru M, Ardekani GS, Zhang G, Martinka M, McElwee KJ, Li G, Rotte A. A combination of p300 and Braf expression in the diagnosis and prognosis of melanoma. BMC Cancer 2014; 14:398. [PMID: 24893747 PMCID: PMC4051389 DOI: 10.1186/1471-2407-14-398] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Accepted: 05/29/2014] [Indexed: 01/18/2023] Open
Abstract
Background To date only a handful of drugs are available for the treatment of melanoma. Among them vemurafenib, a BrafV600E specific inhibitor, showed promising results in terms of response rate and increase in median survival time. However, its effectiveness is limited by development of resistance and the search for additional drugs for melanoma treatment is ongoing. The present study was performed to analyze the correlation between Braf expression and the expression of p300, a known down stream target of the mitogen activated protein kinase (MAPK) pathway, which was recently shown by us to be a prognostic marker for melanoma progression and patient survival. Methods The expression of Braf and p300 expression were correlated and analyzed by Chi-square test. A total of 327 melanoma patient cases (193 primary melanoma and 134 metastatic melanoma) were used for the study. Classification & regression tree (CRT), Kaplan-Meier, and multivariate Cox regression analysis were used to elucidate the significance of the combination of Braf and p300 expression in the diagnosis and prognosis of melanoma. Results Our results demonstrate that Braf expression is inversely correlated with nuclear p300 and positively correlated with cytoplasmic p300 expression. Braf and cytoplasmic p300 were found to be associated with melanoma progression, tumor size and ulceration status. CRT analysis revealed that a combination of Braf and p300 expression (nuclear and cytoplasmic), could be used to distinguish between nevi and melanoma, and primary from metastatic melanoma lesions. The combination of Braf and nuclear p300 was significantly associated with patient survival and nuclear p300 was found to be an independent predictor of patient survival. Conclusion Our results indicate a cross-talk between Braf and p300 in melanoma and demonstrate the importance Braf and p300 expression in the diagnosis and prognosis of melanoma.
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Affiliation(s)
| | | | | | | | | | | | - Anand Rotte
- Skin Cancer Biology Laboratory, Department of Dermatology and Skin Science, University of British Columbia, Research Pavilion, 828 West, 10th Avenue, Vancouver, BC V5Z 1 L8, Canada.
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16
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Mandalà M, Massi D. Tissue prognostic biomarkers in primary cutaneous melanoma. Virchows Arch 2014; 464:265-81. [PMID: 24487785 DOI: 10.1007/s00428-013-1526-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 12/03/2013] [Indexed: 01/04/2023]
Abstract
Cutaneous melanoma (CM) causes the greatest number of skin cancer-related deaths worldwide. Predicting CM prognosis is important to determine the need for further investigation, counseling of patients, to guide appropriate management (particularly the need for postoperative adjuvant therapy), and for assignment of risk status in groups of patients entering clinical trials. Since recurrence rate is largely independent from stages defined by morphological and morphometric criteria, there is a strong need for identification of additional robust prognostic factors to support decision-making processes. Most data on prognostic biomarkers in melanoma have been evaluated in tumor tissue samples by conventional morphology and immunohistochemistry (IHC) as well as DNA and RNA analyses. In the present review, we critically summarize main high-quality studies investigating IHC-based protein biomarkers of melanoma outcome according to Reporting Recommendations for Tumor Marker Prognostic Studies (REMARK)-derived criteria. Pathways have been classified and conveyed in the "biologic road" previously described by Hanahan and Weinberg. Data derived from genomic and transcriptomic technologies have been critically reviewed to better understand if any of investigated proteins or gene signatures should be incorporated into clinical practice or still remain a field of melanoma research. Despite a wide body of research, no molecular prognostic biomarker has yet been translated into clinical practice. Conventional tissue biomarkers, such as Breslow thickness, ulceration, mitotic rate and lymph node positivity, remain the backbone prognostic indicators in melanoma.
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Affiliation(s)
- Mario Mandalà
- Unit of Clinical and Translational Research, Medical Oncology, Department of Oncology and Hematology, Papa Giovanni XXIII Hospital, Bergamo, Italy
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17
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Rothberg BEG, Rimm DL. Construction and analysis of multiparameter prognostic models for melanoma outcome. Methods Mol Biol 2014; 1102:227-58. [PMID: 24258982 DOI: 10.1007/978-1-62703-727-3_13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The outcome of Stage II melanoma is uncertain. Despite that 10-year melanoma-specific survival can approach 50 % following curative-intent wide local excision and negative sentinel lymph node biopsy, the adverse risk-benefit ratio of interferon-based adjuvant regimens precludes their use in most patients. The discovery and translation of protein-based prognostic biomarkers into the clinic offers the promise for residual risk stratification of Stage II melanoma patients beyond conventional clinicopathologic criteria to identify an additional subset of patients who, based upon tumor molecular profiles, might also derive benefit from adjuvant regimens. Despite incorporation of Ki-67 assays into clinical practice, systematic review of REMARK-compliant, immunostain-based prognostic biomarker assays in melanoma suggests that residual risk of recurrence might be best explained by a composite score derived from a small panel of proteins representing independent features of melanoma biology. Reflecting this trend, to date, five such multiparameter melanoma prognostic models have been published. Here, we review these five models and provide detailed protocols for discovering and validating multiparameter models including: appropriate cohort recruitment strategies, comprehensive laboratory protocols supporting fully quantitative chromogenic or fluorescent immunostaining platforms, statistical approaches to create composite prognostic indices recommended steps for model validation in independent cohorts.
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18
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Rotte A, Bhandaru M, Cheng Y, Sjoestroem C, Martinka M, Li G. Decreased expression of nuclear p300 is associated with disease progression and worse prognosis of melanoma patients. PLoS One 2013; 8:e75405. [PMID: 24098694 PMCID: PMC3787094 DOI: 10.1371/journal.pone.0075405] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 08/12/2013] [Indexed: 12/24/2022] Open
Abstract
Background Genomic instability due to UV radiation is one of the leading causes for melanoma. Histone acetyltransferase p300 plays an indispensible role in DNA repair and maintenance of genomic integrity. The present study was performed to analyze the correlation between p300 expression, melanoma progression and patient survival. Methods Tissue microarray and immunohistochemical analysis was employed to study the expression of p300 in melanoma patients. A total of 358 melanoma patients (250 primary melanoma and 108 metastatic melanoma) were used for the study. Kaplan-Meier, univariate and multivariate Cox regression analysis, and receiver-operating characteristic curves, were used to elucidate the prognostic significance of p300 expression. Results Our results demonstrate that p300 is expressed in both nucleus and cytoplasm but the nuclear expression of p300 is predominant. The progression of disease from dysplastic nevi to primary melanoma and to metastatic melanoma was associated with decreased nuclear and increased cytoplasmic p300 expression. Especially, the loss of nuclear and gain in cytoplasmic p300 was correlated with the progression of melanoma from AJCC stage II to stage III, which requires the migration and metastasis of cancer cells from primary sites to lymph nodes. Similarly, decrease in nuclear, and increase in cytoplasmic p300 expression correlated with worse survival of melanoma patients. Nuclear p300 but not cytoplasmic p300 could predict the patient survival independent of AJCC stage, age and gender. Conclusion Loss of nuclear p300 expression is an indicator of worse patient survival and is an independent prognostic marker for melanoma.
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Affiliation(s)
- Anand Rotte
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
| | - Madhuri Bhandaru
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yabin Cheng
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cecilia Sjoestroem
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
| | - Magdalena Martinka
- Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Gang Li
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
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Benevenuto-de-Andrade BA, León JE, Carlos R, Delgado-Azañero W, Mosqueda-Taylor A, Paes-de-Almeida O. Immunohistochemical expression of Skp2 protein in oral nevi and melanoma. Med Oral Patol Oral Cir Bucal 2013; 18:e388-91. [PMID: 23385514 PMCID: PMC3668862 DOI: 10.4317/medoral.18781] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 11/11/2012] [Indexed: 11/24/2022] Open
Abstract
Objective: The aim of this study was to analyze the immunohistochemical expression of Skp2 protein in 38 oral nevi and 11 primary oral melanomas.
Study Design: Expression of this ubiquitin protein was evaluated by immunohistochemistry in 49 oral melanocytic lesions, including 38 intramucosal nevi and 11 primary oral melanomas. The labeling index (LI) was assessed considering the percentage of cells expressing nuclear positivity out of the total number of cells, counting 1000 cells per slide.
Results: Skp2 protein was rarely expressed in intramucosal nevi, in contrast to oral melanomas, which showed high levels of this protein.
Conclusion: These results indicate that Skp2 protein may play a role in the development and progression of oral melanomas, and it also could be useful as an immunohistochemical marker for differential diagnosis of oral benign and malignant melanocytic lesions.
Key words:Oral melanoma, oral nevi, Skp2, cell cycle, immunohistochemistry.
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Laurent S, Queirolo P, Boero S, Salvi S, Piccioli P, Boccardo S, Minghelli S, Morabito A, Fontana V, Pietra G, Carrega P, Ferrari N, Tosetti F, Chang LJ, Mingari MC, Ferlazzo G, Poggi A, Pistillo MP. The engagement of CTLA-4 on primary melanoma cell lines induces antibody-dependent cellular cytotoxicity and TNF-α production. J Transl Med 2013; 11:108. [PMID: 23634660 PMCID: PMC3663700 DOI: 10.1186/1479-5876-11-108] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 04/23/2013] [Indexed: 01/01/2023] Open
Abstract
Background CTLA-4 (Cytotoxic T lymphocyte antigen-4) is traditionally known as a negative regulator of T cell activation. The blocking of CTLA-4 using human monoclonal antibodies, such as Ipilimumab, is currently used to relieve CTLA-4-mediated inhibition of anti-tumor immune response in metastatic melanoma. Herein, we have analyzed CTLA-4 expression and Ipilimumab reactivity on melanoma cell lines and tumor tissues from cutaneous melanoma patients. Then, we investigated whether Ipilimumab can trigger innate immunity in terms of antibody dependent cellular cytotoxicity (ADCC) or Tumor Necrosis Factor (TNF)-α release. Finally, a xenograft murine model was set up to determine in vivo the effects of Ipilimumab and NK cells on melanoma. Methods CTLA-4 expression and Ipilimumab reactivity were analyzed on 17 melanoma cell lines (14 primary and 3 long-term cell lines) by cytofluorimetry and on 33 melanoma tissues by immunohistochemistry. CTLA-4 transcripts were analyzed by quantitative RT-PCR. Soluble CTLA-4 and TNF-α were tested by ELISA. Peripheral blood mononuclear cells (PBMC), NK and γδT cells were tested in ADCC assay with Ipilimumab and melanoma cell lines. TNF-α release was analyzed in NK-melanoma cell co-cultures in the presence of ipilimumab. In vivo experiments of xenotransplantation were carried out in NOD/SCID mice. Results were analyzed using unpaired Student’s t-test. Results All melanoma cell lines expressed mRNA and cytoplasmic CTLA-4 but surface reactivity with Ipilimumab was quite heterogeneous. Accordingly, about 2/3 of melanoma specimens expressed CTLA-4 at different level of intensity. Ipilimumab triggered, via FcγReceptorIIIA (CD16), ex vivo NK cells as well as PBMC, IL-2 activated NK and γδT cells to ADCC of CTLA-4+ melanoma cells. No ADCC was detected upon interaction with CTLA-4- FO-1 melanoma cell line. TNF-α was released upon interaction of NK cells with CTLA-4+ melanoma cell lines. Remarkably, Ipilimumab neither affected proliferation and viability nor triggered ADCC of CTLA-4+ T lymphocytes. In a chimeric murine xenograft model, the co-engraftment of Ipilimumab-treated melanoma cells with human allogeneic NK cells delayed and significantly reduced tumor growth, as compared to mice receiving control xenografts. Conclusions Our studies demonstrate that Ipilimumab triggers effector lymphocytes to cytotoxicity and TNF-α release. These findings suggest that Ipilimumab, besides blocking CTLA-4, can directly activate the elimination of CTLA-4+ melanomas.
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Affiliation(s)
- Stefania Laurent
- Department of Internal Medicine, University of Genoa, Genoa, Italy
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Xie CM, Wei W, Sun Y. Role of SKP1-CUL1-F-box-protein (SCF) E3 ubiquitin ligases in skin cancer. J Genet Genomics 2013; 40:97-106. [PMID: 23522382 PMCID: PMC3861240 DOI: 10.1016/j.jgg.2013.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 01/30/2013] [Accepted: 02/04/2013] [Indexed: 11/25/2022]
Abstract
Many biological processes such as cell proliferation, differentiation, and cell death depend precisely on the timely synthesis and degradation of key regulatory proteins. While protein synthesis can be regulated at multiple levels, protein degradation is mainly controlled by the ubiquitin-proteasome system (UPS), which consists of two distinct steps: (1) ubiquitylation of targeted protein by E1 ubiquitin-activating enzyme, E2 ubiquitin-conjugating enzyme and E3 ubiquitin ligase, and (2) subsequent degradation by the 26S proteasome. Among all E3 ubiquitin ligases, the SCF (SKP1-CUL1-F-box protein) E3 ligases are the largest family and are responsible for the turnover of many key regulatory proteins. Aberrant regulation of SCF E3 ligases is associated with various human diseases, such as cancers, including skin cancer. In this review, we provide a comprehensive overview of all currently published data to define a promoting role of SCF E3 ligases in the development of skin cancer. The future directions in this area of research are also discussed with an ultimate goal to develop small molecule inhibitors of SCF E3 ligases as a novel approach for the treatment of human skin cancer. Furthermore, altered components or substrates of SCF E3 ligases may also be developed as the biomarkers for early diagnosis or predicting prognosis.
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Affiliation(s)
- Chuan-Ming Xie
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Yi Sun
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, University of Michigan, MI 48109, USA
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Yan L, Yun N, Xiu-Min D, Xu-Qi X. Oncogenic role of Skp2 and p27Kip1 in intraductal proliferative lesions of the breast. ACTA ACUST UNITED AC 2012; 27:161-6. [PMID: 23062638 DOI: 10.1016/s1001-9294(14)60049-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To investigate whether the connection of p27(Kip1) to S-phase kinase-associated protein 2 (Skp2) plays an oncogenic role in intraductal proliferative lesions of the breast. METHODS Here we investigated the mechanism involved in association of Skp2’s degradation of p27(Kip1) with the breast carcinogenesis by immunohistochemical method through detection of Skp2 and p27(Kip1) protein levels in 120 paraffin-embedded tissues of intraductal proliferative lesions including usual ductal hyperplasia (UDH, n=30), atypical ductal hyperplasia (n=30), flat epithelial atypia (FEA, n=30), and ductal carcinoma in situ (DCIS, n=30). Moreover, the expression status of Skp2 and p27(Kip1) in 30 cases of the normal breast paraffin-embedded tissues were explored. RESULTS The DCIS group was with the highest Skp2 level and the lowest p27(Kip1) level, and the UDH group was with the lowest Skp2 level and the highest p27(Kip1) level.Both Skp2 and p27(Kip1) levels in the DCIS group were significantly different from those in the UDH group (all P<0.01).The levels of Skp2 and p27(Kip1) in the FEA group were significantly different from both the DCIS and UDH groups (all P<0.05).p27(Kip1) was negatively correlated with Skp2 in both the UDH group (r=-0.629, P=0.026) and DCIS group (r=-0.893, P=0.000). CONCLUSION Overexpression of Skp2 might be the mechanism underlying p27(Kip1) over degradation.
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Affiliation(s)
- Lv Yan
- Department of Acupuncture and Moxibustion, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
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Tu Y, Chen C, Pan J, Xu J, Zhou ZG, Wang CY. The Ubiquitin Proteasome Pathway (UPP) in the regulation of cell cycle control and DNA damage repair and its implication in tumorigenesis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2012; 5:726-738. [PMID: 23071855 PMCID: PMC3466981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 09/11/2012] [Indexed: 06/01/2023]
Abstract
Accumulated evidence supports that the ubiquitin proteasome pathway (UPP) plays a crucial role in protein metabolism implicated in the regulation of many biological processes such as cell cycle control, DNA damage response, apoptosis, and so on. Therefore, alterations for the ubiquitin proteasome signaling or functional impairments for the ubiquitin proteasome components are involved in the etiology of many diseases, particularly in cancer development. In this minireview, we first give a brief outline for the ubiquitin proteasome pathway, we then discuss with focus for the ubiquitin proteasome pathway in the regulation of cell cycle control and DNA damage response, the relevance for the altered regulation of these signaling pathways in tumorigenesis is also reviewed. We finally assess and summarize the advancement for targeting the ubiquitin proteasome pathway in cancer therapy. A better understanding of the biological functions underlying ubiquitin regulatory mechanisms would provide us a wider prospective on cancer treatment.
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Affiliation(s)
- Yaqin Tu
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Cai Chen
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Junru Pan
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Junfa Xu
- The Department of Clinical Immunology, Guangdong Medical College1 Xincheng Ave. Dongguan, 523808, Guangdong, China
| | - Zhi-Guang Zhou
- Diabetes Center, the Second Xiangya Hospital and Key Laboratory of Diabetes Immunology, Central South UniversityChangsha, China
| | - Cong-Yi Wang
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
- The Department of Clinical Immunology, Guangdong Medical College1 Xincheng Ave. Dongguan, 523808, Guangdong, China
- The Center for Biotechnology & Genomic Medicine, Georgia Health Sciences University1120 15th Street, CA4098, Augusta, GA 30912, USA
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Novel multiple markers to distinguish melanoma from dysplastic nevi. PLoS One 2012; 7:e45037. [PMID: 23028750 PMCID: PMC3459895 DOI: 10.1371/journal.pone.0045037] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 08/11/2012] [Indexed: 12/31/2022] Open
Abstract
Background Distinguishing melanoma from dysplastic nevi can be challenging. Objective To assess which putative molecular biomarkers can be optimally combined to aid in the clinical diagnosis of melanoma from dysplastic nevi. Methods Immunohistochemical expressions of 12 promising biomarkers (pAkt, Bim, BRG1, BRMS1, CTHRC1, Cul1, ING4, MCL1, NQO1, SKP2, SNF5 and SOX4) were studied in 122 melanomas and 33 dysplastic nevi on tissue microarrays. The expression difference between melanoma and dysplastic nevi was performed by univariate and multiple logistic regression analysis, diagnostic accuracy of single marker and optimal combinations were performed by receiver operating characteristic (ROC) curve and artificial neural network (ANN) analysis. Classification and regression tree (CART) was used to examine markers simultaneous optimizing the accuracy of melanoma. Ten-fold cross-validation was analyzed for estimating generalization error for classification. Results Four (Bim, BRG1, Cul1 and ING4) of 12 markers were significantly differentially expressed in melanoma compared with dysplastic nevi by both univariate and multiple logistic regression analysis (p < 0.01). These four combined markers achieved 94.3% sensitivity, 81.8% specificity and attained 84.3% area under the ROC curve (AUC) and the ANN classified accuracy with training of 83.2% and testing of 81.2% for distinguishing melanoma from dysplastic nevi. The classification trees identified ING4, Cul1 and BRG1 were the most important classification parameters in ranking top-performing biomarkers with cross-validation error of 0.03. Conclusions The multiple biomarkers ING4, Cul1, BRG1 and Bim described here can aid in the discrimination of melanoma from dysplastic nevi and provide a new insight to help clinicians recognize melanoma.
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Liu J, Wei XL, Huang WH, Chen CF, Bai JW, Zhang GJ. Cytoplasmic Skp2 expression is associated with p-Akt1 and predicts poor prognosis in human breast carcinomas. PLoS One 2012; 7:e52675. [PMID: 23300741 PMCID: PMC3531378 DOI: 10.1371/journal.pone.0052675] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 11/19/2012] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND S-phase kinase protein 2 (Skp2), an oncogenic protein, is a key regulator in different cellular and molecular processes, through ubiquitin-proteasome degradation pathway. Increased levels of Skp2 are observed in various types of cancer and associated with poor prognosis. However, in human breast carcinomas, the underlying mechanism and prognostic significance of cytoplasmic Skp2 is still undefined. METHODS To investigate the role of cytoplasmic Skp2 expression in human breast carcinomas, we immnohistochemically assessed cytoplasmic Skp2, p-Akt1, and p27 expression in 251 patients with invasive ductal carcinomas of the breast. Association of cytoplasmic Skp2 expression with p-Akt1 and p27 was analyzed as well as correspondence with other clinicopathological parameters. Disease-free survival and overall survival were determined based on the Kaplan-Meier method and Cox regression models. RESULTS Cytoplasmic of Skp2 was detected in 165 out of 251 (65.7%) patients. Cytoplasmic Skp2 expression was associated with larger tumor size, more advanced histological grade, and positive HER2 expression. Increased cytoplasmic Skp2 expression correlated with p-Akt1 expression, with 54.2% (51/94) of low p-Akt1-expressing breast carcinomas, but 72.6% (114/157) of high p-Akt1-expressing breast carcinomas exhibiting cytoplasmic Skp2 expression. Elevated cytoplasmic Skp2 expression with low p-Akt1 expression was associated with poor disease-free and overall survival (DFS and OS), and Cox regression models demonstrated that cytoplasmic Skp2 expression was an independent prognostic marker for invasive breast carcinomas. CONCLUSION Cytoplasmic Skp2 expression is associated with aggressive prognostic factors, such as larger tumor size, and advanced histological grade of the breast cancers. Results demonstrate that combined cytoplasmic Skp2 and p-Akt1 expression may be prognostic for patients with invasive breast carcinomas, and cytoplasmic Skp2 may serve as a potential therapeutic target.
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Affiliation(s)
- Jing Liu
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
- Cancer Research Center, Shantou University Medical College, Shantou, Guangdong Province, PR China
| | - Xiao-Long Wei
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
- Cancer Research Center, Shantou University Medical College, Shantou, Guangdong Province, PR China
| | - Wen-He Huang
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
| | - Chun-Fa Chen
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
- Cancer Research Center, Shantou University Medical College, Shantou, Guangdong Province, PR China
| | - Jing-Wen Bai
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
- Cancer Research Center, Shantou University Medical College, Shantou, Guangdong Province, PR China
| | - Guo-Jun Zhang
- The Breast Center, The Affiliated Cancer Hospital of Shantou University Medical College, Shantou, Guangdong Province, PR China
- Cancer Research Center, Shantou University Medical College, Shantou, Guangdong Province, PR China
- * E-mail:
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SHIN EUN, KIM SOOHEE, JEONG HAEYEON, JANG JAJUNE, LEE KYUNGBUN. Nuclear expression of S-phase kinase-associated protein 2 predicts poor prognosis of hepatocellular carcinoma. APMIS 2011; 120:349-57. [DOI: 10.1111/j.1600-0463.2011.02838.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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