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Chhabra G, Singh CK, Ndiaye MA, Su S, Shirley CA, Ahmad N. Role of PLK1/NUMB/NOTCH in epithelial-mesenchymal transition in human melanoma. NPJ Precis Oncol 2024; 8:6. [PMID: 38184733 PMCID: PMC10771520 DOI: 10.1038/s41698-023-00493-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 12/02/2023] [Indexed: 01/08/2024] Open
Abstract
Polo-like kinase 1 (PLK1), a serine/threonine kinase, is overexpressed in melanoma and its expression has been associated with poor disease prognosis. PLK1 has been shown to interact with NUMB, a NOTCH antagonist. However, the exact role of PLK1, NUMB, and NOTCH signaling in epithelial-mesenchymal transition (EMT) in melanoma progression is unclear. In this study, Affymetrix microarray analysis was performed to determine differentially expressed genes following shRNA-mediated knockdown of PLK1 in human melanoma cells that showed significant modulations in EMT and metastasis-related genes. Using multiple PLK1-modulated melanoma cell lines, we found that PLK1 is involved in the regulation of cell migration, invasion, and EMT via its kinase activity and NOTCH activation. In vitro kinase assay and mass spectrometry analysis demonstrated a previously unknown PLK1 phosphorylation site (Ser413) on NUMB. Overexpression of non-phosphorylatable (S413A) and phosphomimetic (S413D) mutants of NUMB in melanoma cells implicated the involvement of NUMB-S413 phosphorylation in cell migration and invasion, which was independent of NOTCH activation. To determine the clinical relevance of these findings, immunohistochemistry was performed using melanoma tissue microarray, which indicated a strong positive correlation between PLK1 and N-cadherin, a protein required for successful EMT. These findings were supported by TCGA analysis, where expression of high PLK1 with low NUMB or high NOTCH or N-cadherin showed a significant decrease in survival of melanoma patients. Overall, these results suggest a potential role of PLK1 in EMT, migration, and invasion of melanoma cells. Our findings support the therapeutic targeting of PLK1, NUMB, and NOTCH for melanoma management.
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Affiliation(s)
- Gagan Chhabra
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA
| | - Chandra K Singh
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA
| | - Mary A Ndiaye
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA
| | - Shengqin Su
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA
| | - Carl A Shirley
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, Madison, WI, 53705, USA.
- William S. Middleton Memorial Veterans Hospital, Madison, WI, 53705, USA.
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2
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Yang E, Ding Q, Fan X, Ye H, Xuan C, Zhao S, Ji Q, Yu W, Liu Y, Cao J, Fang M, Ding X. Machine learning modeling and prognostic value analysis of invasion-related genes in cutaneous melanoma. Comput Biol Med 2023; 162:107089. [PMID: 37267825 DOI: 10.1016/j.compbiomed.2023.107089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/06/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
In this study, we aimed to develop an invasion-related risk signature and prognostic model for personalized treatment and prognosis prediction in skin cutaneous melanoma (SKCM), as invasion plays a crucial role in this disease. We identified 124 differentially expressed invasion-associated genes (DE-IAGs) and selected 20 prognostic genes (TTYH3, NME1, ORC1, PLK1, MYO10, SPINT1, NUPR1, SERPINE2, HLA-DQB2, METTL7B, TIMP1, NOX4, DBI, ARL15, APOBEC3G, ARRB2, DRAM1, RNF213, C14orf28, and CPEB3) using Cox and LASSO regression to establish a risk score. Gene expression was validated through single-cell sequencing, protein expression, and transcriptome analysis. Negative correlations were discovered between risk score, immune score, and stromal score using ESTIMATE and CIBERSORT algorithms. High- and low-risk groups exhibited significant differences in immune cell infiltration and checkpoint molecule expression. The 20 prognostic genes effectively differentiated between SKCM and normal samples (AUCs >0.7). We identified 234 drugs targeting 6 genes from the DGIdb database. Our study provides potential biomarkers and a risk signature for personalized treatment and prognosis prediction in SKCM patients. We developed a nomogram and machine-learning prognostic model to predict 1-, 3-, and 5-year overall survival (OS) using risk signature and clinical factors. The best model, Extra Trees Classifier (AUC = 0.88), was derived from pycaret's comparison of 15 classifiers. The pipeline and app are accessible at https://github.com/EnyuY/IAGs-in-SKCM.
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Affiliation(s)
- Enyu Yang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
| | - Qianyun Ding
- Department of 'A', The Children's Hospital, National Clinical Research Center for Child Health, Zhejiang University School of Medicine, 310003, Hangzhou, China.
| | - Xiaowei Fan
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
| | - Haihan Ye
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
| | - Cheng Xuan
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
| | - Shuo Zhao
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
| | - Qing Ji
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Department of Head and Neck and Rare Oncology, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, 310022, Hangzhou, China.
| | - Weihua Yu
- Department of Gastroenterology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, 322000, Yiwu, China.
| | - Yongfu Liu
- Department of Emergency, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, China.
| | - Jun Cao
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Department of Head and Neck and Rare Oncology, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, 310022, Hangzhou, China.
| | - Meiyu Fang
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Department of Head and Neck and Rare Oncology, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, 310022, Hangzhou, China.
| | - Xianfeng Ding
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, 310018, Hangzhou, China.
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3
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PAK2 is essential for chromosome alignment in metaphase I oocytes. Cell Death Dis 2023; 14:150. [PMID: 36813765 PMCID: PMC9947007 DOI: 10.1038/s41419-023-05585-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 02/24/2023]
Abstract
As a highly conserved and ubiquitously expressed serine/threonine kinase, p21-activated kinase 2 (PAK2) participates in diverse biologic events. However, its roles in mouse oocyte meiotic maturation remain unclear. The present study revealed that mouse oocytes depleted of Pak2 were unable to completely progress through meiosis and that a majority were arrested at metaphase I. Pak2 depletion thus prompted MI arrest and induced meiotic chromosome alignment defects in mouse oocytes, in part due to a reduction in polo-like kinase (PLK1). We demonstrated that PAK2's interaction with PLK1 protected it from degradation by APC/CCdh1, and that it promoted meiotic progression and bipolar spindle formation. Our data collectively display critical functions for PAK2 in meiotic progression and chromosome alignment in mouse oocytes.
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4
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Hristova DM, Fukumoto T, Takemori C, Gao L, Hua X, Wang JX, Li L, Beqiri M, Watters A, Vultur A, Gimie Y, Rebecca V, Samarkina A, Jimbo H, Nishigori C, Zhang J, Cheng C, Wei Z, Somasundaram R, Fukunaga-Kalabis M, Herlyn M. NUMB as a Therapeutic Target for Melanoma. J Invest Dermatol 2022; 142:1882-1892.e5. [PMID: 34883044 PMCID: PMC9704357 DOI: 10.1016/j.jid.2021.11.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 10/26/2021] [Accepted: 11/16/2021] [Indexed: 11/27/2022]
Abstract
The upregulation of the adaptor protein NUMB triggers melanocytic differentiation from multipotent skin stem cells, which share many properties with aggressive melanoma cells. Although NUMB acts as a tumor suppressor in various human cancer types, little is known about its role in melanoma. In this study, we investigated the role of NUMB in melanoma progression and its regulatory mechanism. Analysis of The Cancer Genome Atlas melanoma datasets revealed that high NUMB expression in melanoma tissues correlates with improved patient survival. Moreover, NUMB expression is downregulated in metastatic melanoma cells. NUMB knockdown significantly increased the invasion potential of melanoma cells in a three-dimensional collagen matrix in vitro and in the lungs of a mouse model in vivo; it also significantly upregulated the expression of the NOTCH target gene CCNE. Previous studies suggested that Wnt signaling increases NUMB expression. By mimicking Wnt stimulation through glycogen synthase kinase-3 inhibition, we increased NUMB expression in melanoma cells. Furthermore, a glycogen synthase kinase-3 inhibitor reduced the invasion of melanoma cells in a NUMB-dependent manner. Together, our results suggest that NUMB suppresses invasion and metastasis in melanoma, potentially through its regulation of the NOTCH‒CCNE axis and that the inhibitors that upregulate NUMB can exert therapeutic effects in melanoma.
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Affiliation(s)
| | - Takeshi Fukumoto
- The Wistar Institute, Philadelphia, Pennsylvania, USA; Division of Dermatology, Department of Internal Related, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - Chihiro Takemori
- Division of Dermatology, Department of Internal Related, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Le Gao
- Department of Computer Science, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - Xia Hua
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | - Joshua X Wang
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | - Ling Li
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | | | | | - Adina Vultur
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | - Yusra Gimie
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | - Vito Rebecca
- The Wistar Institute, Philadelphia, Pennsylvania, USA
| | | | - Haruki Jimbo
- Division of Dermatology, Department of Internal Related, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Chikako Nishigori
- Division of Dermatology, Department of Internal Related, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Jie Zhang
- Department of Computer Science, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - Chaoran Cheng
- Department of Computer Science, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - Zhi Wei
- Department of Computer Science, New Jersey Institute of Technology, Newark, New Jersey, USA
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5
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Su S, Chhabra G, Ndiaye MA, Singh CK, Ye T, Huang W, Dewey CN, Setaluri V, Ahmad N. PLK1 and NOTCH Positively Correlate in Melanoma and Their Combined Inhibition Results in Synergistic Modulations of Key Melanoma Pathways. Mol Cancer Ther 2021; 20:161-172. [PMID: 33177155 PMCID: PMC7790869 DOI: 10.1158/1535-7163.mct-20-0654] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/24/2020] [Accepted: 10/23/2020] [Indexed: 11/16/2022]
Abstract
Melanoma is one of the most serious forms of skin cancer, and its increasing incidence coupled with nonlasting therapeutic options for metastatic disease highlights the need for additional novel approaches for its management. In this study, we determined the potential interactions between polo-like kinase 1 (PLK1, a serine/threonine kinase involved in mitotic regulation) and NOTCH1 (a type I transmembrane protein deciding cell fate during development) in melanoma. Employing an in-house human melanoma tissue microarray (TMA) containing multiple cases of melanomas and benign nevi, coupled with high-throughput, multispectral quantitative fluorescence imaging analysis, we found a positive correlation between PLK1 and NOTCH1 in melanoma. Furthermore, The Cancer Genome Atlas database analysis of patients with melanoma showed an association of higher mRNA levels of PLK1 and NOTCH1 with poor overall, as well as disease-free, survival. Next, utilizing small-molecule inhibitors of PLK1 and NOTCH (BI 6727 and MK-0752, respectively), we found a synergistic antiproliferative response of combined treatment in multiple human melanoma cells. To determine the molecular targets of the overall and synergistic responses of combined PLK1 and NOTCH inhibition, we conducted RNA-sequencing analysis employing a unique regression model with interaction terms. We identified the modulations of several key genes relevant to melanoma progression/metastasis, including MAPK, PI3K, and RAS, as well as some new genes such as Apobec3G, BTK, and FCER1G, which have not been well studied in melanoma. In conclusion, our study demonstrated a synergistic antiproliferative response of concomitant targeting of PLK1 and NOTCH in melanoma, unraveling a potential novel therapeutic approach for detailed preclinical/clinical evaluation.
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Affiliation(s)
- Shengqin Su
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin
| | - Gagan Chhabra
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin
| | - Mary A Ndiaye
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin
| | - Chandra K Singh
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin
| | - Ting Ye
- Department of Statistics, University of Wisconsin, Madison, Wisconsin
| | - Wei Huang
- Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, Wisconsin
| | - Colin N Dewey
- Department of Biostatistics and Medical Informatics, University of Wisconsin, Madison, Wisconsin
| | - Vijayasaradhi Setaluri
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin
- William S. Middleton VA Medical Center, Madison, Wisconsin
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin.
- William S. Middleton VA Medical Center, Madison, Wisconsin
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6
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Takeda Y, Yamazaki K, Hashimoto K, Watanabe K, Chinen T, Kitagawa D. The centriole protein CEP76 negatively regulates PLK1 activity in the cytoplasm for proper mitotic progression. J Cell Sci 2020; 133:jcs241281. [PMID: 32878946 DOI: 10.1242/jcs.241281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 08/24/2020] [Indexed: 08/31/2023] Open
Abstract
Polo-like kinase 1 (PLK1) dynamically changes its localization and plays important roles in proper mitotic progression. In particular, strict control of cytoplasmic PLK1 is needed to prevent mitotic defects. However, the regulation of cytoplasmic PLK1 is not fully understood. In this study, we show that CEP76, a centriolar protein, physically interacts with PLK1 and tightly controls the activation of cytoplasmic PLK1 during mitosis in human cells. We found that removal of centrosomes induced ectopic aggregation of PLK1, which is highly phosphorylated, in the cytoplasm during mitosis. Importantly, a targeted RNAi screen revealed that depletion of CEP76 resulted in a similar phenotype. In addition, depletion of CEP76 caused defective spindle orientation and mitotic delay. Moreover, the formation of ectopic PLK1 aggregates and defective spindle orientation were significantly suppressed by the inhibition of PLK1 kinase activity. Overall, these results demonstrate that CEP76 suppresses the aberrant activation of cytoplasmic PLK1 for proper mitotic progression.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Yutaka Takeda
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - Kaho Yamazaki
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - Kaho Hashimoto
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - Koki Watanabe
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - Takumi Chinen
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - Daiju Kitagawa
- Department of Physiological Chemistry, Graduate School of Pharmaceutical Science, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
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7
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The potential mechanism of action of Sorcin and its interacting proteins. Clin Chim Acta 2020; 510:741-745. [PMID: 32946798 DOI: 10.1016/j.cca.2020.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/09/2020] [Accepted: 09/09/2020] [Indexed: 12/14/2022]
Abstract
Sorcin (Soluble resistance-related calcium binding protein) is a calcium binding oncoprotein. Sorcin is overexpressed in several human tumors and cancer cells lines which confers multidrug resistance (MDR) to these cells. This review summarizes the biochemical functions of Sorcin which includes modulation of calcium homeostasis, apoptosis, and cancer metastasis. Sorcin is involved in various biological processes by interacting with other proteins, such as p-glycoprotein, programmed cell death protein 6, tumor necrosis factor receptor-associated protein 1, Annexin A7, polo-like kinase 1, HCV nonstructural 5A, signal transducer and activator of transcription 3, presenilin 2, α-synuclein, Ca2+-release channel and others. A deeper look into the function and interacting partners of Sorcin sheds more light on the possible effects of its physical activity and more elaborately, exploring the role of Sorcin in future research prospects.
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8
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Kimata Y, Leturcq M, Aradhya R. Emerging roles of metazoan cell cycle regulators as coordinators of the cell cycle and differentiation. FEBS Lett 2020; 594:2061-2083. [PMID: 32383482 DOI: 10.1002/1873-3468.13805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 01/10/2023]
Abstract
In multicellular organisms, cell proliferation must be tightly coordinated with other developmental processes to form functional tissues and organs. Despite significant advances in our understanding of how the cell cycle is controlled by conserved cell-cycle regulators (CCRs), how the cell cycle is coordinated with cell differentiation in metazoan organisms and how CCRs contribute to this process remain poorly understood. Here, we review the emerging roles of metazoan CCRs as intracellular proliferation-differentiation coordinators in multicellular organisms. We illustrate how major CCRs regulate cellular events that are required for cell fate acquisition and subsequent differentiation. To this end, CCRs employ diverse mechanisms, some of which are separable from those underpinning the conventional cell-cycle-regulatory functions of CCRs. By controlling cell-type-specific specification/differentiation processes alongside the progression of the cell cycle, CCRs enable spatiotemporal coupling between differentiation and cell proliferation in various developmental contexts in vivo. We discuss the significance and implications of this underappreciated role of metazoan CCRs for development, disease and evolution.
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Affiliation(s)
- Yuu Kimata
- School of Life Science and Technology, ShanghaiTech University, China
| | - Maïté Leturcq
- School of Life Science and Technology, ShanghaiTech University, China
| | - Rajaguru Aradhya
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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9
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Kannan S, Aitken MJL, Herbrich SM, Golfman LS, Hall MG, Mak DH, Burks JK, Song G, Konopleva M, Mullighan CG, Chandra J, Zweidler-McKay PA. Antileukemia Effects of Notch-Mediated Inhibition of Oncogenic PLK1 in B-Cell Acute Lymphoblastic Leukemia. Mol Cancer Ther 2019; 18:1615-1627. [PMID: 31227645 PMCID: PMC6726528 DOI: 10.1158/1535-7163.mct-18-0706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 11/08/2018] [Accepted: 06/17/2019] [Indexed: 02/03/2023]
Abstract
In B-cell acute lymphoblastic leukemia (B-ALL), activation of Notch signaling leads to cell-cycle arrest and apoptosis. We aimed to harness knowledge acquired by understanding a mechanism of Notch-induced cell death to elucidate a therapeutically viable target in B-ALL. To this end, we identified that Notch activation suppresses Polo-like kinase 1 (PLK1) in a B-ALL-specific manner. We identified that PLK1 is expressed in all subsets of B-ALL and is highest in Philadelphia-like (Ph-like) ALL, a high-risk subtype of disease. We biochemically delineated a mechanism of Notch-induced PLK1 downregulation that elucidated stark regulation of p53 in this setting. Our findings identified a novel posttranslational cascade initiated by Notch in which CHFR was activated via PARP1-mediated PARylation, resulting in ubiquitination and degradation of PLK1. This led to hypophosphorylation of MDM2Ser260, culminating in p53 stabilization and upregulation of BAX. shRNA knockdown or pharmacologic inhibition of PLK1 using BI2536 or BI6727 (volasertib) in B-ALL cell lines and patient samples led to p53 stabilization and cell death. These effects were seen in primary human B-ALL samples in vitro and in patient-derived xenograft models in vivo These results highlight PLK1 as a viable therapeutic target in B-ALL. Efficacy of clinically relevant PLK1 inhibitors in B-ALL patient-derived xenograft mouse models suggests that use of these agents may be tailored as an additional therapeutic strategy in future clinical studies.
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Affiliation(s)
| | - Marisa J L Aitken
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
- The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, Texas
| | - Shelley M Herbrich
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
- The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, Texas
| | - Leonard S Golfman
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mandy G Hall
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Duncan H Mak
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jared K Burks
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Guangchun Song
- Department of Pathology, St. Jude's Children's Research Hospital, Memphis, Tennessee
| | - Marina Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Charles G Mullighan
- Department of Pathology, St. Jude's Children's Research Hospital, Memphis, Tennessee
| | - Joya Chandra
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
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10
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Yen CC, Chen SC, Hung GY, Wu PK, Chua WY, Lin YC, Yen CH, Chen YC, Wang JY, Yang MH, Chao Y, Chang MC, Chen WM. Expression profile‑driven discovery of AURKA as a treatment target for liposarcoma. Int J Oncol 2019; 55:938-948. [PMID: 31485600 DOI: 10.3892/ijo.2019.4861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 07/23/2019] [Indexed: 11/06/2022] Open
Abstract
Liposarcoma (LPS) is one of the most frequently reported type of soft‑tissue sarcoma (STS). Well‑differentiated (WD) LPS and dedifferentiated (DD) LPS are the two most common subtypes. Chemotherapy has been considered to be ineffective in LPS, and novel treatment agents are thus necessary. In this study, we reanalyzed two published microarray data sets of LPS. By comparing the top 50 upregulated genes in DD LPS in both sets of data, we identified 12 overlapping genes. Of note, the top five gene sets enriched in DD LPS in both sets of data were involved in cell cycle regulation. Among the 12 overlapping genes, aurora kinase A (AURKA) is a well‑known gene involved in cell cycle regulation; we thus further investigated this gene. AURKA was significantly upregulated in DD LPS, compared with WD LPS. Among 40 cases of DD LPS in GSE30929, patients with high AURKA expression in tumors had significantly worse distant recurrence‑free survival than those with low expression. In an in vitro model, MLN8237, an AURKA inhibitor, could inhibit AURKA in LPS cell lines with a resultant G2/M arrest. MLN8237 was also reported to exert a cytotoxic effect by inducing apoptosis in LPS cell lines. Furthermore, except for cisplatin, MLN8237 had a significantly synergistic effect with chemotherapy agents against LPS. MLN8237 induced cellular senescence in LPS cell lines with increased expression of DcR2, a senescence biomarker, and upregulated expression of cytokines associated with the senescence‑associated secretory phenotype, including interleukin (IL)‑1α, IL‑6 and IL‑8. Our study identified AURKA as a potential biomarker for predicting poor prognosis in LPS. The findings of the present study suggested the potential of AURKA as a therapeutic target in LPS cell line models, while the novel combination of AURKA inhibitors and chemotherapy requires further investigation.
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Affiliation(s)
- Chueh-Chuan Yen
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - San-Chi Chen
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Giun-Yi Hung
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Po-Kuei Wu
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Wei-Yang Chua
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yung-Chan Lin
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Chiao-Han Yen
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yen-Chun Chen
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Jir-You Wang
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Muh-Hwa Yang
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yee Chao
- Division of Medical Oncology, Center for Immuno‑Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Ming-Chau Chang
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Wei-Ming Chen
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
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11
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Fortini F, Vieceli Dalla Sega F, Caliceti C, Lambertini E, Pannuti A, Peiffer DS, Balla C, Rizzo P. Estrogen-mediated protection against coronary heart disease: The role of the Notch pathway. J Steroid Biochem Mol Biol 2019; 189:87-100. [PMID: 30817989 DOI: 10.1016/j.jsbmb.2019.02.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/05/2019] [Accepted: 02/20/2019] [Indexed: 12/28/2022]
Abstract
Estrogen regulates a plethora of biological processes, under physiological and pathological conditions, by affecting key pathways involved in the regulation of cell proliferation, fate, survival and metabolism. The Notch receptors are mediators of communication between adjacent cells and are key determinants of cell fate during development and in postnatal life. Crosstalk between estrogen and the Notch pathway intervenes in many processes underlying the development and maintenance of the cardiovascular system. The identification of molecular mechanisms underlying the interaction between these types of endocrine and juxtacrine signaling are leading to a deeper understanding of physiological conditions regulated by these steroid hormones and, potentially, to novel therapeutic approaches to prevent pathologies linked to reduced levels of estrogen, such as coronary heart disease, and cardiotoxicity caused by hormone therapy for estrogen-receptor-positive breast cancer.
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Affiliation(s)
| | | | - Cristiana Caliceti
- Department of Chemistry "Giacomo Ciamician", Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Elisabetta Lambertini
- Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Antonio Pannuti
- University of Hawaii Cancer Center, University of Hawaii, Honolulu, HI, USA
| | - Daniel S Peiffer
- Oncology Research Institute, Loyola University Chicago: Health Sciences Division, Maywood, Illinois, USA; Department of Microbiology and Immunology, Loyola University Chicago: Health Sciences Division, Maywood, Illinois, USA
| | - Cristina Balla
- Cardiovascular Center, University of Ferrara, Ferrara, Italy
| | - Paola Rizzo
- Maria Cecilia Hospital, GVM Care & Research, Cotignola, RA, Italy; Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy; Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy.
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12
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Shao C, Chien SJ, Farah E, Li Z, Ahmad N, Liu X. Plk1 phosphorylation of Numb leads to impaired DNA damage response. Oncogene 2018; 37:810-820. [PMID: 29059161 PMCID: PMC5931337 DOI: 10.1038/onc.2017.379] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 08/03/2017] [Accepted: 09/04/2017] [Indexed: 12/16/2022]
Abstract
Although Numb is well-recognized as a cell-fate determinant in stem/progenitor cells, accumulating evidence supports that Numb also has a critical role in adult tissues and cancers, in particular, in the context of regulation of tumor suppressor p53. Herein, we identified Numb as a novel substrate of Polo-like kinase 1 (Plk1). Of significance, we showed that Plk1-mediated phosphorylation of Numb leads to its enhanced proteasomal degradation and impaired Numb/p53 pathway, thus providing another mechanism how Plk1 antagonizes p53 during DNA damage response. In addition, the novel phosphorylation event identified by us further supports the notion that post-translational modifications of Numb uncouple Numb from p53 and lead to p53 destabilization. Finally, our data generated from both human cancer cell lines and mouse xenograft model showed that cancer cells carrying the unphosphorylated form of Numb by Plk1 are more sensitive to doxorubicin, a classical chemotherapeutic drug. Therefore, our work may provide future strategies for improving the efficacy of chemotherapy by targeting Numb phosphorylation by Plk1.
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Affiliation(s)
- C Shao
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - S-J Chien
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, USA
| | - E Farah
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - Z Li
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - N Ahmad
- Department of Dermatology, University of Wisconsin, Madison, WI, USA
| | - X Liu
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
- Center for Cancer Research, Purdue University, West Lafayette, IN, USA
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13
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Abstract
Melanoma is an aggressive skin cancer that can rapidly metastasize to become fatal, if not diagnosed early. Despite recent therapeutic advances, management of melanoma remains difficult. Therefore, novel molecular targets and strategies are required to manage this neoplasm. This study was undertaken to determine the role of the sirtuin SIRT6 in melanoma. Employing a panel of human melanoma cells and normal human melanocytes, we found significant SIRT6 mRNA and protein upregulation in melanoma cells. Further, using a tissue microarray coupled with quantitative Vectra analysis, we demonstrated significant SIRT6 overexpression in human melanoma tissues. Lentiviral short hairpin RNA-mediated knockdown of SIRT6 in A375 and Hs 294T human melanoma cells significantly decreased cell growth, viability, and colony formation, induced G1-phase arrest and increased senescence-associated beta-galactosidase staining. As autophagy is important in melanoma and is associated with SIRT6, we used a qPCR array to study SIRT6 knockdown in A375 cells. We found significant modulation in several genes and/or proteins (decreases in AKT1, ATG12, ATG3, ATG7, BAK1, BCL2L1, CLN3, CTSB, CTSS, DRAM2, HSP90AA1, IRGM, NPC1, SQSTM1, TNF, and BECN1; increases in GAA, ATG10). Our data suggests that increased SIRT6 expression may contribute to melanoma development and/or progression, potentially via senescence-and autophagy-related pathways.
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14
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Zhang Z, Chen C, Ma L, Yu Q, Li S, Abbasi B, Yang J, Rui R, Ju S. Plk1 is essential for proper chromosome segregation during meiosis I/meiosis II transition in pig oocytes. Reprod Biol Endocrinol 2017; 15:69. [PMID: 28851440 PMCID: PMC5575893 DOI: 10.1186/s12958-017-0289-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/13/2017] [Indexed: 02/23/2023] Open
Abstract
BACKGROUND Polo-like kinase 1 (Plk1), as a characteristic regulator in meiosis, organizes multiple biological events of cell division. Although Plk1 has been implicated in various functions in somatic cell mitotic processes, considerably less is known regarding its function during the transition from metaphase I (MI) to metaphase II (MII) stage in oocyte meiotic progression. METHODS In this study, the possible role of Plk1 during the MI-to-MII stage transition in pig oocytes was addressed. Initially, the spatiotemporal expression and subcellular localization pattern of Plk1 were revealed in pig oocytes from MI to MII stage using indirect immunofluorescence and confocal microscopy imaging techniques combined with western blot analyses. Moreover, a highly selective Plk1 inhibitor, GSK461364, was used to determine the potential role of Plk1 during this MI-to-MII transition progression. RESULTS Upon expression, Plk1 exhibited a specific dynamic intracellular localization, and co-localization of Plk1 with α-tubulin was revealed in the meiotic spindle of pig oocyte during the transition from MI to MII stage. GSK461364 treatment significantly blocked the first polar body (pbI) emission in a dose-dependent manner and resulted in a failure of meiotic maturation, with a larger percentage of the GSK461364-treated oocytes arresting in the anaphase-telophase I (ATI) stage. Further subcellular structure examination results showed that inhibition of Plk1 with GSK461364 had no visible effect on spindle assembly but caused a significantly higher proportion of the treated oocytes to have obvious defects in homologous chromosome segregation at ATI stage. CONCLUSIONS Thus, these results indicate that Plk1 plays an essential role during the meiosis I/meiosis II transition in porcine oocytes, and the regulation is associated with Plk1's effects on homologous chromosome segregation in the ATI stage.
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Affiliation(s)
- Zixiao Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Changchao Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Liying Ma
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Qiuchen Yu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Shuai Li
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Benazir Abbasi
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Jiayi Yang
- Nanjing Foreign Languages School, Nanjing, 210008 China
| | - Rong Rui
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
| | - Shiqiang Ju
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095 China
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15
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Gutteridge REA, Singh CK, Ndiaye MA, Ahmad N. Targeted knockdown of polo-like kinase 1 alters metabolic regulation in melanoma. Cancer Lett 2017; 394:13-21. [PMID: 28235541 PMCID: PMC5415376 DOI: 10.1016/j.canlet.2017.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/09/2017] [Accepted: 02/10/2017] [Indexed: 01/05/2023]
Abstract
A limited number of studies have indicated an association of the mitotic kinase polo-like kinase 1 (PLK1) and cellular metabolism. Here, employing an inducible RNA interference approach in A375 melanoma cells coupled with a PCR array and multiple validation approaches, we demonstrated that PLK1 alters a number of genes associated with cellular metabolism. PLK1 knockdown resulted in a significant downregulation of IDH1, PDP2 and PCK1 and upregulation of FBP1. Ingenuity Pathway Analysis (IPA) identified that 1) glycolysis and the pentose phosphate pathway are major canonical pathways associated with PLK1, and 2) PLK1 inhibition-modulated genes were largely associated with cellular proliferation, with FBP1 being the key modulator. Further, BI 6727-mediated inhibition of PLK1 caused a decrease in PCK1 and increase in FBP1 in A375 melanoma cell implanted xenografts in vivo. Furthermore, an inverse correlation between PLK1 and FBP1 was found in melanoma cells, with FBP1 expression significantly downregulated in a panel of melanoma cells. In addition, BI 6727 treatment resulted in an upregulation in FBP1 in A375, Hs294T and G361 melanoma cells. Overall, our study suggests that PLK1 may be an important regulator of metabolism maintenance in melanoma cells.
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Affiliation(s)
| | - Chandra K Singh
- Department of Dermatology, University of Wisconsin, 1300 University Avenue, Madison, WI 53706, USA
| | - Mary Ann Ndiaye
- Department of Dermatology, University of Wisconsin, 1300 University Avenue, Madison, WI 53706, USA
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, 1300 University Avenue, Madison, WI 53706, USA; William S. Middleton VA Medical Center, 2500 Overlook Terrace, Madison, WI 53705, USA.
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16
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Shao C, Li Z, Ahmad N, Liu X. Regulation of PTEN degradation and NEDD4-1 E3 ligase activity by Numb. Cell Cycle 2017; 16:957-967. [PMID: 28437168 PMCID: PMC5462079 DOI: 10.1080/15384101.2017.1310351] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 03/01/2017] [Accepted: 03/17/2017] [Indexed: 01/05/2023] Open
Abstract
The critical tumor suppressor PTEN is regulated by numerous post-translational modifications including phosphorylation, acetylation and ubiquitination. Ubiquitination of PTEN was reported to control both PTEN stability and nuclear localization. Notably, the HECT E3-ligase NEDD4-1 was identified as the ubiquitin ligase for PTEN, mediating its degradation and down-stream events. However, the mechanisms how NEDD4-1 is regulated by up-stream signaling pathways or interaction with other proteins in promoting PTEN degradation remain largely unclear. In the present study, we identified that the adaptor protein Numb, which is demonstrated to be a novel binding partner of NEDD4-1, plays important roles in controlling PTEN ubiquitination through regulating NEDD4-1 activity and the association between PTEN and NEDD4-1. Furthermore, we provided data to show that Numb regulates cell proliferation and glucose metabolism in a PTEN-dependent manner. Overall, our study revealed a novel regulation of the well-documented NEDD4-1/PTEN pathway and its oncogenic behavior.
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Affiliation(s)
- Chen Shao
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - Zhiguo Li
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, Madison, WI, USA
| | - Xiaoqi Liu
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
- Center for Cancer Research, Purdue University, West Lafayette, IN, USA
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17
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Zhang Z, Chen C, Cui P, Liao Y, Yao L, Zhang Y, Rui R, Ju S. Plk1 inhibition leads to a failure of mitotic division during the first mitotic division in pig embryos. J Assist Reprod Genet 2017; 34:399-407. [PMID: 28074435 PMCID: PMC5360688 DOI: 10.1007/s10815-016-0864-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 12/19/2016] [Indexed: 12/01/2022] Open
Abstract
PURPOSE This study was conducted to examine the dynamic distribution of polo-like 1 kinase (Plk1) and the possible role it plays in first mitotic division during early porcine embryo development. METHODS Indirect immunofluorescence and confocal microscopy imaging techniques combined with western blot analyses were used to study the dynamic expression and subcellular localization of Plk1 protein in pig parthenogenetic embryos. Finally, a selective Plk1 inhibitor, GSK461364, was used to evaluate the potential role of Plk1 during this special stage. RESULTS The results showed that Plk1 upon expression exhibited specific dynamic intracellular localization, which closely correlated with the α-tubulin distribution during the first mitotic division. GSK461364 treatment resulted in cleavage failure, with majority of the GSK461364-treated embryos being arrested in prometaphase. Further results of the subcellular structure examination showed that GSK461364 treatment led to a significantly higher proportion of the treated embryos having abnormal spindles and misarranged chromosomes at the prometaphase stage. CONCLUSIONS Thus, these results indicated that Plk1 is essential for porcine embryos to complete the first mitotic division. Furthermore, Plk1 regulation was associated with effects on spindle assembly and chromosome arrangement.
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Affiliation(s)
- Zixiao Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Changchao Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Panpan Cui
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Yaya Liao
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Lingyun Yao
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Yue Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Rong Rui
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China
| | - Shiqiang Ju
- College of Veterinary Medicine, Nanjing Agricultural University, Jiangsu, 210095, China.
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18
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Zhao W, Liu J, Zhang X, Deng LW. MLL5 maintains spindle bipolarity by preventing aberrant cytosolic aggregation of PLK1. J Cell Biol 2016; 212:829-43. [PMID: 27002166 PMCID: PMC4810297 DOI: 10.1083/jcb.201501021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/12/2016] [Indexed: 11/25/2022] Open
Abstract
Faithful chromosome segregation with bipolar spindle formation is critical for the maintenance of genomic stability. Perturbation of this process often leads to severe mitotic failure, contributing to tumorigenesis. MLL5 has been demonstrated to play vital roles in cell cycle progression and the maintenance of genomic stability. Here, we identify a novel interaction between MLL5 and PLK1 in the cytosol that is crucial for sustaining spindle bipolarity during mitosis. Knockdown of MLL5 caused aberrant PLK1 aggregation that led to acentrosomal microtubule-organizing center (aMTOC) formation and subsequent spindle multipolarity. Further molecular studies revealed that the polo-box domain (PBD) of PLK1 interacted with a binding motif on MLL5 (Thr887-Ser888-Thr889), and this interaction was essential for spindle bipolarity. Overexpression of wild-type MLL5 was able to rescue PLK1 mislocalization and aMTOC formation in MLL5-KD cells, whereas MLL5 mutants incapable of interacting with the PBD failed to do so. We thus propose that MLL5 preserves spindle bipolarity through maintaining cytosolic PLK1 in a nonaggregated form.
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Affiliation(s)
- Wei Zhao
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Jie Liu
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Xiaoming Zhang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Lih-Wen Deng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
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19
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Chou YS, Yen CC, Chen WM, Lin YC, Wen YS, Ke WT, Wang JY, Liu CY, Yang MH, Chen TH, Liu CL. Cytotoxic mechanism of PLK1 inhibitor GSK461364 against osteosarcoma: Mitotic arrest, apoptosis, cellular senescence, and synergistic effect with paclitaxel. Int J Oncol 2016; 48:1187-94. [PMID: 26794530 DOI: 10.3892/ijo.2016.3352] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 12/19/2015] [Indexed: 11/06/2022] Open
Abstract
Polo-like kinase 1 (PLK1), a serine/threonine kinase and an oncogene, is crucial in regulating cell cycle progression. PLK1 also has been demonstrated as a potential target of osteosarcoma (OS) by using short hairpin RNA libraries in lentiviral vectors for screening of protein kinase. In preclinical studies, GSK461364, a potent and selective ATP-competitive PLK1 inhibitor, showed antiproliferative activity against multiple tumor cell lines. In the present study, we evaluated the expression level of PLK1 in OS and explored the cytotoxic mechanism of GSK461364 against OS. PLK1 was significantly overexpressed in OS compared with normal osteoblasts and other types of sarcoma. GSK461364 inhibited PLK1 and caused mitotic arrest by inducing G2/M arrest in OS cells. Moreover, GSK461364 exerted a cytotoxic effect by inducing apoptosis in OS, and induced cellular senescence in OS cell lines, as indicated by an increased senescence-associated β-galactosidase activity and enhanced DcR2 and interleukin-1α expression. In addition, we demonstrated a synergistic cytotoxic effect of GSK461364 and paclitaxel, possibly resulting from combined mitotic arrest. In conclusion, the present study revealed that PLK1 was overexpressed in OS and that GSK461364 exerted its cytotoxic effect on OS by inducing mitotic arrest and subsequent apoptosis and induced cellular senescence; therefore, senescence-associated markers can be used as treatment biomarkers, and a combination of GSK461364 and paclitaxel can potentially treat OS.
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Affiliation(s)
- Yi-Sheng Chou
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Chueh-Chuan Yen
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Wei-Ming Chen
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Yung-Chan Lin
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Yao-Shan Wen
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Wei-Ting Ke
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Jir-You Wang
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Chun-Yu Liu
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Muh-Hwa Yang
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Tain-Hsiung Chen
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Chien-Lin Liu
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
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20
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Graham ZA, Collier L, Peng Y, Saéz JC, Bauman WA, Qin W, Cardozo CP. A Soluble Activin Receptor IIB Fails to Prevent Muscle Atrophy in a Mouse Model of Spinal Cord Injury. J Neurotrauma 2016; 33:1128-35. [PMID: 26529111 DOI: 10.1089/neu.2015.4058] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Myostatin (MST) is a potent regulator of muscle growth and size. Spinal cord injury (SCI) results in marked atrophy of muscle below the level of injury. Currently, there is no effective pharmaceutical treatment available to prevent sublesional muscle atrophy post-SCI. To determine whether inhibition of MST with a soluble activin IIB receptor (RAP-031) prevents sublesional SCI-induced muscle atrophy, mice were randomly assigned to the following groups: Sham-SCI; SCI+Vehicle group (SCI-VEH); and SCI+RAP-031 (SCI-RAP-031). SCI was induced by complete transection at thoracic level 10. Animals were euthanized at 56 days post-surgery. RAP-031 reduced, but did not prevent, body weight loss post-SCI. RAP-031 increased total lean tissue mass compared to SCI-VEH (14.8%). RAP-031 increased forelimb muscle mass post-SCI by 38% and 19% for biceps and triceps, respectively (p < 0.001). There were no differences in hindlimb muscle weights between the RAP-031 and SCI-VEH groups. In the gastrocnemius, messenger RNA (mRNA) expression was elevated for interleukin (IL)-6 (8-fold), IL-1β (3-fold), and tumor necrosis factor alpha (8-fold) in the SCI-VEH, compared to the Sham group. Muscle RING finger protein 1 mRNA was 2-fold greater in the RAP-031 group, compared to Sham-SCI. RAP-031 did not influence cytokine expression. Bone mineral density of the distal femur and proximal tibia were decreased post-SCI (-26% and -28%, respectively) and were not altered by RAP-031. In conclusion, MST inhibition increased supralesional muscle mass, but did not prevent sublesional muscle or bone loss, or the inflammation in paralyzed muscle.
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Affiliation(s)
- Zachary A Graham
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York.,5 Department of Medicine, Icahn School of Medicine at Mount Sinai , New York, New York
| | - Lauren Collier
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York
| | - Yuanzhen Peng
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York
| | - Juan C Saéz
- 3 Department of Physiology, Pontificia Universidad Católica , Santiago, Chile .,4 Centro Interdisciplinario de Neurociencias de Valparaiso , Valparaiso, Chile
| | - William A Bauman
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York.,2 Medical Service, James J. Peters VA Medical Center , Bronx, New York.,5 Department of Medicine, Icahn School of Medicine at Mount Sinai , New York, New York.,6 Department of Rehabilitation Medicine, Icahn School of Medicine at Mount Sinai , New York, New York
| | - Weiping Qin
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York.,5 Department of Medicine, Icahn School of Medicine at Mount Sinai , New York, New York
| | - Christopher P Cardozo
- 1 National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center , Bronx, New York.,2 Medical Service, James J. Peters VA Medical Center , Bronx, New York.,5 Department of Medicine, Icahn School of Medicine at Mount Sinai , New York, New York.,6 Department of Rehabilitation Medicine, Icahn School of Medicine at Mount Sinai , New York, New York.,7 Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai , New York, New York
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21
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Nöske K, Stark HJ, Nevaril L, Berning M, Langbein L, Goyal A, Diederichs S, Boukamp P. Mitotic Diversity in Homeostatic Human Interfollicular Epidermis. Int J Mol Sci 2016; 17:E167. [PMID: 26828486 PMCID: PMC4783901 DOI: 10.3390/ijms17020167] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/08/2016] [Accepted: 01/15/2016] [Indexed: 01/17/2023] Open
Abstract
Despite decades of skin research, regulation of proliferation and homeostasis in human epidermis is still insufficiently understood. To address the role of mitoses in tissue regulation, we utilized human long-term skin equivalents and systematically assessed mitoses during early epidermal development and long-term epidermal regeneration. We now demonstrate four different orientations: (1) horizontal, i.e., parallel to the basement membrane (BM) and suggestive of symmetric divisions; (2) oblique with an angle of 45°-70°; or (3) perpendicular, suggestive of asymmetric division. In addition, we demonstrate a fourth substantial fraction of suprabasal mitoses, many of which are committed to differentiation (Keratin K10-positive). As verified also for normal human skin, this spatial mitotic organization is part of the regulatory program of human epidermal tissue homeostasis. As a potential marker for asymmetric division, we investigated for Numb and found that it was evenly spread in almost all undifferentiated keratinocytes, but indeed asymmetrically distributed in some mitoses and particularly frequent under differentiation-repressing low-calcium conditions. Numb deletion (stable knockdown by CRISPR/Cas9), however, did not affect proliferation, neither in a three-day follow up study by life cell imaging nor during a 14-day culture period, suggesting that Numb is not essential for the general control of keratinocyte division.
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Affiliation(s)
- Katharina Nöske
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
| | - Hans-Jürgen Stark
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
| | - Leonard Nevaril
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
| | - Manuel Berning
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
| | - Lutz Langbein
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
| | - Ashish Goyal
- Department of RNA Biology and Cancer, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
- Institute of Pathology, University Hospital Heidelberg, Im Neuenheimer Feld 224, Heidelberg 69120, Germany.
| | - Sven Diederichs
- Department of RNA Biology and Cancer, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
- Division of Cancer Research, Department of Thoracic Surgery, Medical Center, University of Freiburg-Faculty of Medicine, University of Freiburg, Breisacher Str. 115, Freiburg 79106, Germany.
- German Cancer Consortium (DKTK), Freiburg 79106, Germany.
- Institute of Pathology, University Hospital Heidelberg, Im Neuenheimer Feld 224, Heidelberg 69120, Germany.
| | - Petra Boukamp
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.
- IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf 40225, Germany.
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George J, Nihal M, Singh CK, Zhong W, Liu X, Ahmad N. Pro-Proliferative Function of Mitochondrial Sirtuin Deacetylase SIRT3 in Human Melanoma. J Invest Dermatol 2015; 136:809-818. [PMID: 26743598 DOI: 10.1016/j.jid.2015.12.026] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 11/30/2015] [Accepted: 12/07/2015] [Indexed: 11/28/2022]
Abstract
Melanoma, the most aggressive form of skin cancer, is often fatal if not treated early. Therefore, novel target-based strategies are required to combat this neoplasm. The objective of this study was to determine the role and functional significance of the mitochondrial sirtuin 3 (SIRT3) in melanoma. We found that compared with normal primary and immortalized human melanocytes, SIRT3 is significantly overexpressed in multiple human melanoma cells at mRNA and protein levels. Further, employing human tissue microarray, we found that SIRT3 is significantly upregulated in clinical melanoma tissues, compared with melanocytic nevi tissues. Furthermore, a short hairpin RNA-mediated knockdown of SIRT3 in human melanoma cells resulted in (i) a decrease in cellular proliferation, colony formation, and cellular migration; (ii) induction of senescence as shown by an increase in senescence-associated beta-galactosidase activity and formation of senescence-associated heterochromatin foci as well as an increase in mRNA and protein levels of p16(INK4a) and p21(Waf1); (iii) G1-phase arrest of the cell cycle; and (iv) decreases in mRNA and protein levels of cyclins (D1, E1) and cyclin-dependent kinases (2, 4, and 6). Conversely, forced exogenous overexpression of SIRT3 promoted an increase in proliferative potential of Hs294T melanoma cells and normal immortalized Mel-ST melanocytes. Finally, we found that SIRT3 knockdown significantly inhibited tumorigenesis in a xenograft model in vivo. To our knowledge, this is the first study supporting the pro-proliferative function of SIRT3 in melanoma.
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Affiliation(s)
- Jasmine George
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA
| | - Minakshi Nihal
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA
| | - Chandra K Singh
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA
| | - Weixiong Zhong
- Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, Wisconsin, USA
| | - Xiaoqi Liu
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, USA
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA; William S. Middleton VA Medical Center, Madison, Wisconsin, USA.
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Singh CK, George J, Nihal M, Sabat G, Kumar R, Ahmad N. Novel downstream molecular targets of SIRT1 in melanoma: a quantitative proteomics approach. Oncotarget 2015; 5:1987-99. [PMID: 24743044 PMCID: PMC4039116 DOI: 10.18632/oncotarget.1898] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Melanoma is one of the most lethal forms of skin cancer and its incidence is continuing to rise in the United States. Therefore, novel mechanism and target-based strategies are needed for the management of this disease. SIRT1, a NAD(+)-dependent class III histone deacetylase, has been implicated in a variety of physiological processes and pathological conditions. We recently demonstrated that SIRT1 is upregulated in melanoma and its inhibition by a small-molecule, tenovin-1, inhibits cell proliferation and clonogenic survival of melanoma cells, possibly via activating p53. Here, we employed a gel free quantitative proteomics approach to identify the downstream effectors and targets of SIRT1 in melanoma. The human malignant melanoma, G361 cells were treated with tenovin-1 followed by protein extraction, in liquid trypsin digestion, and peptide analyses using nanoLC-MS/MS. A total of 1091 proteins were identified, of which 20 proteins showed significant differential expression with 95% confidence interval. These proteins were subjected to gene ontology and Ingenuity Pathway Analysis (IPA) to obtain the information regarding their biological and molecular functions. Real-Time qRT-PCR validation showed that five of these (PSAP, MYO1B, MOCOS, HIS1H4A and BUB3) were differentially expressed at mRNA levels. Based on their important role in cell cycle regulation, we selected to focus on BUB family proteins (BUB3, as well as BUB1 and BUBR1) for subsequent validation. The qRT-PCR and immunoblot analyses showed that tenovin-1 inhibition of SIRT1 resulted in a downregulation of BUB3, BUB1 and BUBR1 in multiple melanoma cell lines. Since tenovin-1 is an inhibitor of both SIRT1 and SIRT2, we employed lentivirus mediated silencing of SIRT1 and SIRT2 in G361 cells to determine if the observed effects on BUB family proteins are due to SIRT1- or SIRT2- inhibition. We found that only SIRT1 inhibition resulted in a decrease in BUB3, BUB1 and BUBR1. Our study identified the mitotic checkpoint regulator BUB family proteins as novel downstream targets of SIRT1. However, further validation is needed in appropriate models to confirm our findings and expand on our observations.
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Affiliation(s)
- Chandra K Singh
- Department of Dermatology, University of Wisconsin, Madison, WI
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Hong J, Liu Z, Zhu H, Zhang X, Liang Y, Yao S, Wang F, Xie X, Zhang B, Tan T, Fu L, Nie J, Cheng C. The tumor suppressive role of NUMB isoform 1 in esophageal squamous cell carcinoma. Oncotarget 2014; 5:5602-14. [PMID: 24980814 PMCID: PMC4170621 DOI: 10.18632/oncotarget.2136] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 06/24/2014] [Indexed: 12/30/2022] Open
Abstract
Esophageal quamous cell carcinoma (ESCC) is the predominant histological type of esophageal carcinoma in Asian populations. To date, few biomarkers have been identified for ESCC. In present study, we found a tumor suppressor, NUMB isoform 1 (NUMB-1), as a promising prognostic biomarker for patients with ESCC. NUMB-1 mRNA was downregulated in 66.7% of primary ESCC tissues when compared with matched adjacent non-tumor tissues. The low expression of NUMB-1 was significantly associated with high tumor recurrence (p=0.029) and poor post-operative overall survival (p=0.016). To further explore the underlying mechanisms by which NUMB-1 regulates ESCC, we demonstrated that ectopic expression of NUMB-1 inhibited cell proliferation through inducing G2/M phase arrest, which was accompanied by an increase in p21 and cyclin B1-cdc2 levels. However, it had no impact on apoptosis of ESCC cells. In addition, overexpression of NUMB-1 prevented epithelial-mesenchymal transition, inhibited invasion of ESCC cells and NOTCH pathway, suppressed Aurora-A activity by preventing phosphorylation of Aurora-A at T288 which resulted in cell cycle arrest. Taken together, our findings suggested NUMB-1 functions as a tumor-suppressor and serves as a prognositc biomarker for ESCC patients; thus, NUMB-1 may be a potential novel therapeutic target for treatment of ESCC.
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Affiliation(s)
- Junmou Hong
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Zhenguo Liu
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Hua Zhu
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH,USA
| | - Xin Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yongju Liang
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Shiyuan Yao
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Fang Wang
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Xiaoyun Xie
- Division of Geriatrics, Tongji Hospital, Tongji University, School of Medicine, Shanghai, People's Republic of China
| | - Bo Zhang
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH,USA
| | - Tao Tan
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH,USA
| | - Liwu Fu
- State Key Laboratory of Oncology in South China, Cancer Center, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Jing Nie
- Division of Nephrology, Nanfang Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Chao Cheng
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
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Yeh CN, Yen CC, Chen YY, Cheng CT, Huang SC, Chang TW, Yao FY, Lin YC, Wen YS, Chiang KC, Chen JS, Yeh TS, Tzeng CH, Chao TC, Fletcher JA. Identification of aurora kinase A as an unfavorable prognostic factor and potential treatment target for metastatic gastrointestinal stromal tumors. Oncotarget 2014; 5:4071-86. [PMID: 24901229 PMCID: PMC4147307 DOI: 10.18632/oncotarget.1705] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 05/20/2014] [Indexed: 02/06/2023] Open
Abstract
Although imatinib mesylate (IM) has revolutionized the management of gastrointestinal stromal tumors (GISTs), drug resistance remains a challenge. Previous studies have shown that the expression of aurora kinase A (AURKA) predicts recurrence in patients with primary, surgically resected GISTs. The current study aimed to evaluate the significance of AURKA expression as an unfavorable prognostic marker for advanced GISTs, and provide evidence that AURKA could be a potential therapeutic target in GISTs. The prognostic significance of the expression of AURKA, along with other clinicopathological factors, was analyzed in a cohort of 99 IM-treated patients with advanced GISTs. The potential use of an inhibitor of AURKA as a therapeutic agent against GISTs was also tested in GIST cell lines. Among 99 enrolled patients, poor performance status, large tumor size, drug response, and AURKA overexpression were independent prognostic factors for poor progression-free survival (PFS). For overall survival (OS), only large tumor size and AURKA overexpression were identified as independent unfavorable factors. In an in vitro study, MLN8237, an AURKA inhibitor, inhibited growth of both IM-sensitive and IM-resistant GIST cells in a concentration-dependent manner, and exhibited synergistic cytotoxicity with IM in GIST cells. The inhibitory effect of MLN8237 in GIST cells could be attributed to the induction of G2/M arrest, apoptosis, and senescence. Our study shows that AURKA expression independently predicted poor PFS and OS in patients with advanced GISTs who were treated with IM. An AURKA inhibitor may have potential as a therapeutic agent for both IM-sensitive and IM-resistant GISTs.
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Affiliation(s)
- Chun-Nan Yeh
- Department of Surgery, Lin-Kou Medical Center, Chang Gung Memorial Hospital and University, Gueishan Township, Taoyuan County, Taiwan
| | - Chueh-Chuan Yen
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan
- National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Yen-Yang Chen
- Division of Hematology-Oncology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chi-Tung Cheng
- Department of Surgery, Lin-Kou Medical Center, Chang Gung Memorial Hospital and University, Gueishan Township, Taoyuan County, Taiwan
| | - Shih-Chiang Huang
- Department of Pathology, Lin-Kou Medical Center, Chang Gung Memorial Hospital and University, Gueishan Township, Taoyuan County, Taiwan
| | - Ting-Wei Chang
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Fang-Yi Yao
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yung-Chan Lin
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yao-Shan Wen
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Kun-Chun Chiang
- Department of Surgery, Keelung Medical Center, Chang Gung Memorial Hospital and University, Keelung, Taiwan
| | - Jen-Shi Chen
- Department of Medical Oncology, Lin-Kou Medical Center, Chang Gung Memorial Hospital and University, Gueishan Township, Taoyuan County, Taiwan
| | - Ta-Sen Yeh
- Department of Surgery, Lin-Kou Medical Center, Chang Gung Memorial Hospital and University, Gueishan Township, Taoyuan County, Taiwan
| | - Cheng-Hwai Tzeng
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Ta-Chung Chao
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- Therapeutical and Research Center of Musculoskeletal Tumor, Taipei Veterans General Hospital, Taipei, Taiwan
- National Yang-Ming University School of Medicine, Taipei, Taiwan
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Lalioti VS, Ilari A, O'Connell DJ, Poser E, Sandoval IV, Colotti G. Sorcin links calcium signaling to vesicle trafficking, regulates Polo-like kinase 1 and is necessary for mitosis. PLoS One 2014; 9:e85438. [PMID: 24427308 PMCID: PMC3888430 DOI: 10.1371/journal.pone.0085438] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 11/27/2013] [Indexed: 12/11/2022] Open
Abstract
Sorcin, a protein overexpressed in many multi-drug resistant cancers, dynamically localizes to distinct subcellular sites in 3T3-L1 fibroblasts during cell-cycle progression. During interphase sorcin is in the nucleus, in the plasma membrane, in endoplasmic reticulum (ER) cisternae, and in ER-derived vesicles localized along the microtubules. These vesicles are positive to RyR, SERCA, calreticulin and Rab10. At the beginning of mitosis, sorcin-containing vesicles associate with the mitotic spindle, and during telophase are concentrated in the cleavage furrow and, subsequently, in the midbody. Sorcin regulates dimensions and calcium load of the ER vesicles by inhibiting RYR and activating SERCA. Analysis of sorcin interactome reveals calcium-dependent interactions with many proteins, including Polo-like kinase 1 (PLK1), Aurora A and Aurora B kinases. Sorcin interacts physically with PLK1, is phosphorylated by PLK1 and induces PLK1 autophosphorylation, thereby regulating kinase activity. Knockdown of sorcin results in major defects in mitosis and cytokinesis, increase in the number of rounded polynucleated cells, blockage of cell progression in G2/M, apoptosis and cell death. Sorcin regulates calcium homeostasis and is necessary for the activation of mitosis and cytokinesis.
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Affiliation(s)
- Vasiliki S. Lalioti
- Centro de Biología Molecular Severo Ochoa, CSIC -Universidad Autónoma de Madrid, Departamento Biología Celular e Inmunología, Cantoblanco; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Madrid, Spain
| | - Andrea Ilari
- CNR-National Research Council of Italy, Institute of Molecular Biology and Pathology c/o Department of Biochemical Sciences “A. Rossi Fanelli”, University “Sapienza” P.le A.Moro 5, Rome, Italy
| | - David J. O'Connell
- Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Dublin, Ireland
| | - Elena Poser
- Department of Biochemical Sciences “A. Rossi Fanelli”, University “Sapienza” P.le A.Moro 5, Rome, Italy
| | - Ignacio V. Sandoval
- Centro de Biología Molecular Severo Ochoa, CSIC -Universidad Autónoma de Madrid, Departamento Biología Celular e Inmunología, Cantoblanco; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Madrid, Spain
| | - Gianni Colotti
- CNR-National Research Council of Italy, Institute of Molecular Biology and Pathology c/o Department of Biochemical Sciences “A. Rossi Fanelli”, University “Sapienza” P.le A.Moro 5, Rome, Italy
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27
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Nihal M, Ahmad N, Wood GS. SIRT1 is upregulated in cutaneous T-cell lymphoma, and its inhibition induces growth arrest and apoptosis. Cell Cycle 2013; 13:632-40. [PMID: 24343700 DOI: 10.4161/cc.27523] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Silent information regulator type-1 (SIRT1) is the best-studied member of the Sirtuin (Sir2) family of nicotinamide dinucleotide (NAD)-dependent class III histone deacetylases (HDACs), but has not yet been explored in cutaneous T-cell lymphoma (CTCL). We analyzed five CTCL cell lines and lesional tissues using flow cytometry, immunostaining, immunoblotting, cell death, viability, and apoptosis assays, small-molecule inhibitors, and shRNA knockdown. We found strong SIRT1 expression among CTCL lines relative to normal lymphocytes. CTCL cells in lesional tissues also expressed SIRT1 strongly. SIRT1 knockdown resulted in reduced cellular metabolism and proliferation, increased apoptosis, and PARP cleavage products. Tenovin-1, which reversibly inhibits class III HDACs (SIRT1 and SIRT2), reduced SIRT enzymatic activity and SIRT1 expression and led to increased apoptosis. These alterations were accompanied by increased forkhead box O3 (FoxO3) in several cell lines and increased nuclear p53, as well as acetylated p53 in wtp53 MyLa CTCL line. A combination of class I/II and class III HDACIs (vorinostat and tenovin-1) produced significantly greater growth inhibition, cell death via apoptosis, as well as superior p53 promoter upregulation in wtp53 MyLa cells as compared with either agent alone. This occurred in a partially p53-dependent manner, as these effects were blunted by p53 knockdown. Our results indicate that SIRT1 is strongly expressed in CTCL. Its inhibition results in reduced growth and increased apoptosis of CTCL cells. Furthermore, our findings suggest that some CTCL patients, such as those with wtp53, might benefit more from treatment with a combination of different classes of HDACIs than with a single agent.
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Affiliation(s)
- Minakshi Nihal
- Department of Dermatology; University of Wisconsin School of Medicine and Public Health; Madison, WI USA; Paul P. Carbone Comprehensive Cancer Center; University of Wisconsin School of Medicine and Public Health; Madison, WI USA
| | - Nihal Ahmad
- Department of Dermatology; University of Wisconsin School of Medicine and Public Health; Madison, WI USA; Paul P. Carbone Comprehensive Cancer Center; University of Wisconsin School of Medicine and Public Health; Madison, WI USA; William S. Middleton Memorial Veterans Hospital; Madison, WI USA
| | - Gary S Wood
- Department of Dermatology; University of Wisconsin School of Medicine and Public Health; Madison, WI USA; Paul P. Carbone Comprehensive Cancer Center; University of Wisconsin School of Medicine and Public Health; Madison, WI USA; William S. Middleton Memorial Veterans Hospital; Madison, WI USA
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Abstract
Polo-like kinase 1 (Plk1) is a well-established mitotic regulator with a diverse range of biologic functions continually being identified throughout the cell cycle. Preclinical evidence suggests that the molecular targeting of Plk1 could be an effective therapeutic strategy in a wide range of cancers; however, that success has yet to be translated to the clinical level. The lack of clinical success has raised the question of whether there is a true oncogenic addiction to Plk1 or if its overexpression in tumors is solely an artifact of increased cellular proliferation. In this review, we address the role of Plk1 in carcinogenesis by discussing the cell cycle and DNA damage response with respect to their associations with classic oncogenic and tumor suppressor pathways that contribute to the transcriptional regulation of Plk1. A thorough examination of the available literature suggests that Plk1 activity can be dysregulated through key transformative pathways, including both p53 and pRb. On the basis of the available literature, it may be somewhat premature to draw a definitive conclusion on the role of Plk1 in carcinogenesis. However, evidence supports the notion that oncogene dependence on Plk1 is not a late occurrence in carcinogenesis and it is likely that Plk1 plays an active role in carcinogenic transformation.
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Affiliation(s)
- Brian D. Cholewa
- Department of Dermatology, University of Wisconsin, Madison, WI
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI
| | - Xiaoqi Liu
- Department of Biochemistry, Purdue University, West Lafayette, IN
| | - Nihal Ahmad
- Department of Dermatology, University of Wisconsin, Madison, WI
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, WI
- William S. Middleton Memorial VA Hospital, Madison, WI
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Yu WJ, Zhang BG, Chen LM, Wang SX, Feng WG, Du CQ, Liu SM, Zhao CL. Lentiviral-mediated RNA interference targeting the PLK1 gene inhibits invasion and metastasis of esophageal squamous cell carcinoma cells. Shijie Huaren Xiaohua Zazhi 2013; 21:2128-2135. [DOI: 10.11569/wcjd.v21.i22.2128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the inhibitory effect of lentiviral-mediated RNA interference targeting the PLK1 gene on invasion and metastasis of esophageal squamous cell carcinoma (ESCC) cells.
METHODS: RT-PCR and Western blot were used to detect the expression of PLK1 mRNA and protein in different ESCC cells. Based on the mRNA sequence of human PLK1 gene, interference fragments were designed, and interference efficiency was detected by Western blot. The in vitro effect of PLK1 siRNA on migration and invasion of ESCC cells was assessed by wound-healing assay and Matrigel chemoinvasion assay. The most efficient interference fragment was cloned into the lentiviral vector pGLV/H1/GFP+Puro and sequenced. The resulting recombinant lentiviral vector and packaging plasmids were transfected into 293T cells, and packaged virus particles were used to infect ESCC cells. Interference efficiency was assessed using fluorescence quantitative PCR and Western blot. The in vivo effect of recombinant lentiviral vector on invasion and metastasis of ESCC cells was studied using a nude mouse model of pulmonary metastasis.
RESULTS: The ESCC cell line TE-8 overexpressed PLK1, and the most efficient PLK1 siRNA could obviously inhibit migration and invasion of TE-8 cells in vitro. The lentiviral vector for RNA interference targeting the PLK1 gene was successfully constructed. The prepared recombinant virus particles could infect TE-8 cells and significantly inhibit the metastasis of ESCC cells in vivo.
CONCLUSION: Lentiviral-mediated RNA interference targeting PLK1 could obviously inhibit invasion and metastasis of ESCC cells. PLK1 may promote the malignant development of ESCC.
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Ntelios D, Berninger B, Tzimagiorgis G. Numb and Alzheimer's disease: the current picture. Front Neurosci 2012; 6:145. [PMID: 23060745 PMCID: PMC3463830 DOI: 10.3389/fnins.2012.00145] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 09/14/2012] [Indexed: 11/23/2022] Open
Abstract
Twenty-three years ago, numb was identified as a critical regulator in Drosophila sensory organ precursor cell asymmetric divisions. Beyond the recently recognized role in carcinogenesis, Numb seems to be important in Alzheimer’s disease. This assertion comes from the involvement in various processes such as synapse morphogenesis, amyloid precursor protein trafficking, notch signaling, and neurogenesis. The purpose of the present mini-review is to provide the current picture of Numb’s participation in mechanisms underlying Alzheimer’s disease pathogenesis and emphasize potential aspects for future research.
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Affiliation(s)
- Dimitrios Ntelios
- Laboratory of Biological Chemistry, Medical School, Aristotle University of Thessaloniki Thessaloniki, Greece
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