1
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Li M, Nishimura T, Takeuchi Y, Hongu T, Wang Y, Shiokawa D, Wang K, Hirose H, Sasahara A, Yano M, Ishikawa S, Inokuchi M, Ota T, Tanabe M, Tada KI, Akiyama T, Cheng X, Liu CC, Yamashita T, Sugano S, Uchida Y, Chiba T, Asahara H, Nakagawa M, Sato S, Miyagi Y, Shimamura T, Nagai LAE, Kanai A, Katoh M, Nomura S, Nakato R, Suzuki Y, Tojo A, Voon DC, Ogawa S, Okamoto K, Foukakis T, Gotoh N. FXYD3 functionally demarcates an ancestral breast cancer stem cell subpopulation with features of drug-tolerant persisters. J Clin Invest 2023; 133:e166666. [PMID: 37966117 PMCID: PMC10645391 DOI: 10.1172/jci166666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 09/21/2023] [Indexed: 11/16/2023] Open
Abstract
The heterogeneity of cancer stem cells (CSCs) within tumors presents a challenge in therapeutic targeting. To decipher the cellular plasticity that fuels phenotypic heterogeneity, we undertook single-cell transcriptomics analysis in triple-negative breast cancer (TNBC) to identify subpopulations in CSCs. We found a subpopulation of CSCs with ancestral features that is marked by FXYD domain-containing ion transport regulator 3 (FXYD3), a component of the Na+/K+ pump. Accordingly, FXYD3+ CSCs evolve and proliferate, while displaying traits of alveolar progenitors that are normally induced during pregnancy. Clinically, FXYD3+ CSCs were persistent during neoadjuvant chemotherapy, hence linking them to drug-tolerant persisters (DTPs) and identifying them as crucial therapeutic targets. Importantly, FXYD3+ CSCs were sensitive to senolytic Na+/K+ pump inhibitors, such as cardiac glycosides. Together, our data indicate that FXYD3+ CSCs with ancestral features are drivers of plasticity and chemoresistance in TNBC. Targeting the Na+/K+ pump could be an effective strategy to eliminate CSCs with ancestral and DTP features that could improve TNBC prognosis.
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Affiliation(s)
- Mengjiao Li
- Division of Cancer Cell Biology, Cancer Research Institute, and
| | | | - Yasuto Takeuchi
- Division of Cancer Cell Biology, Cancer Research Institute, and
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa City, Japan
| | - Tsunaki Hongu
- Division of Cancer Cell Biology, Cancer Research Institute, and
| | - Yuming Wang
- Division of Cancer Cell Biology, Cancer Research Institute, and
| | - Daisuke Shiokawa
- Division of Cancer Differentiation, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
| | - Kang Wang
- Department of Oncology-Pathology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Haruka Hirose
- Division of Systems Biology, Graduate School of Medicine, Nagoya University, Nagoya City, Japan
| | - Asako Sasahara
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Masao Yano
- Department of Surgery, Minami-machida Hospital, Machida City, Tokyo, Japan
| | - Satoko Ishikawa
- Department of Breast Oncology, Kanazawa University Hospital, Kanazawa City, Japan
| | - Masafumi Inokuchi
- Department of Breast Oncology, Kanazawa University Hospital, Kanazawa City, Japan
| | - Tetsuo Ota
- Department of Breast Oncology, Kanazawa University Hospital, Kanazawa City, Japan
| | - Masahiko Tanabe
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kei-ichiro Tada
- Department of Breast and Endocrine Surgery, Nihon University, Itabashi-ku, Tokyo, Japan
| | - Tetsu Akiyama
- Laboratory of Molecular and Genetic Information, Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Xi Cheng
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Chia-Chi Liu
- North Shore Heart Research Group, Kolling Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Toshinari Yamashita
- Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama City, Kanagawa, Japan
| | - Sumio Sugano
- Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yutaro Uchida
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Tomoki Chiba
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Hiroshi Asahara
- Department of Systems Biomedicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Masahiro Nakagawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Shinya Sato
- Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama City, Kanagawa, Japan
| | - Yohei Miyagi
- Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama City, Kanagawa, Japan
| | - Teppei Shimamura
- Division of Systems Biology, Graduate School of Medicine, Nagoya University, Nagoya City, Japan
| | | | - Akinori Kanai
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Biosciences
| | - Manami Katoh
- Department of Cardiovascular Medicine, Graduate School of Medicine
- Genome Science Division, Research Center for Advanced Science and Technology
| | - Seitaro Nomura
- Department of Cardiovascular Medicine, Graduate School of Medicine
- Genome Science Division, Research Center for Advanced Science and Technology
- Department of Frontier Cardiovascular Science, Graduate School of Medicine, and
| | - Ryuichiro Nakato
- Laboratory of Computational Genomics, Institute for Quantitative Biosciences
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Biosciences
| | - Arinobu Tojo
- Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
- Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Dominic C. Voon
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa City, Japan
- Inflammation and Epithelial Plasticity Unit, Cancer Research Institute, Kanazawa University, Kanazawa City, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Koji Okamoto
- Division of Cancer Differentiation, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
- Advanced Comprehensive Research Organization, Teikyo University, Itabashi-ku, Tokyo, Japan
| | - Theodoros Foukakis
- Department of Oncology-Pathology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Noriko Gotoh
- Division of Cancer Cell Biology, Cancer Research Institute, and
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa City, Japan
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Kwon JW, Oh JS, Seok SH, An HW, Lee YJ, Lee NY, Ha T, Kim HA, Yoon GM, Kim SE, Oh PR, Lee SH, Voon DC, Kim DY, Park JW. Combined inhibition of Bcl-2 family members and YAP induces synthetic lethality in metastatic gastric cancer with RASA1 and NF2 deficiency. Mol Cancer 2023; 22:156. [PMID: 37730636 PMCID: PMC10510129 DOI: 10.1186/s12943-023-01857-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023] Open
Abstract
BACKGROUND Targetable molecular drivers of gastric cancer (GC) metastasis remain largely unidentified, leading to limited targeted therapy options for advanced GC. We aimed to identify molecular drivers for metastasis and devise corresponding therapeutic strategies. METHODS We performed an unbiased in vivo genome-wide CRISPR/Cas9 knockout (KO) screening in peritoneal dissemination using genetically engineered GC mouse models. Candidate genes were validated through in vivo transplantation assays using KO cells. We analyzed target expression patterns in GC clinical samples using immunohistochemistry. The functional contributions of target genes were studied through knockdown, KO, and overexpression approaches in tumorsphere and organoid assays. Small chemical inhibitors against Bcl-2 members and YAP were tested in vitro and in vivo. RESULTS We identified Nf2 and Rasa1 as metastasis-suppressing genes through the screening. Clinically, RASA1 mutations along with low NF2 expression define a distinct molecular subtype of metastatic GC exhibiting aggressive traits. NF2 and RASA1 deficiency increased in vivo metastasis and in vitro tumorsphere formation by synergistically amplifying Wnt and YAP signaling in cancer stem cells (CSCs). NF2 deficiency enhanced Bcl-2-mediated Wnt signaling, conferring resistance to YAP inhibition in CSCs. This resistance was counteracted via synthetic lethality achieved by simultaneous inhibition of YAP and Bcl-2. RASA1 deficiency amplified the Wnt pathway via Bcl-xL, contributing to cancer stemness. RASA1 mutation created vulnerability to Bcl-xL inhibition, but the additional NF2 deletion conferred resistance to Bcl-xL inhibition due to YAP activation. The combined inhibition of Bcl-xL and YAP synergistically suppressed cancer stemness and in vivo metastasis in RASA1 and NF2 co-deficiency. CONCLUSION Our research unveils the intricate interplay between YAP and Bcl-2 family members, which can lead to synthetic lethality, offering a potential strategy to overcome drug resistance. Importantly, our findings support a personalized medicine approach where combined therapy targeting YAP and Bcl-2, tailored to NF2 and RASA1 status, could effectively manage metastatic GC.
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Affiliation(s)
- Jong-Wan Kwon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Jeong-Seop Oh
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1, Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang Hyeok Seok
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Hyeok-Won An
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Yu Jin Lee
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Na Yun Lee
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Taehun Ha
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Hyeon Ah Kim
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Gyeong Min Yoon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Sung Eun Kim
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Pu-Reum Oh
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea
| | - Su-Hyung Lee
- Section of Surgical Sciences, Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dominic C Voon
- Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, 920-1192, Japan
- Innovative Cancer Model Research Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, 920-1192, Japan
| | - Dae-Yong Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1, Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea.
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Jun Won Park
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1, Kangwondaehak-Gil, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea.
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Kwon JW, Seok SH, Kim S, An HW, Choudhury AD, Woo SH, Oh JS, Kim JK, Voon DC, Kim DY, Park JW. A synergistic partnership between IL-33/ST2 and Wnt pathway through Bcl-xL drives gastric cancer stemness and metastasis. Oncogene 2023; 42:501-515. [PMID: 36526851 DOI: 10.1038/s41388-022-02575-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 12/04/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
ST2 functions as a receptor for the cytokine IL-33. It has been implicated in carcinogenesis. In this study, we sought to mechanistically determine how ST2 and IL-33 function to support cancer stem cell (CSC) activity and drive gastric cancer (GC) pathogenesis. ST2+ subpopulation spontaneously arose during gastric tumorigenesis. A thorough evaluation of ST2 and IL-33 expression in gastric tumors revealed that they show an overlapping expression pattern, notably in poor differentiated GC and metastasis foci. Moreover, their expression levels are clinically correlated to cancer progression. Using a genetic model of CSC-driven gastric carcinogenesis, ST2+ subpopulation displays increased tumorigenicity, chemoresistance and metastatic potentials through increased survival fitness endowed by an elevated MAPK-regulated Bcl-xL. The IL-33/ST2 axis enhances the self-renewal and survival of GC stem cells and organoids. Importantly, we observed a synergistic cooperation between IL-33/ST2 and the canonical Wnt pathway in transactivating Wnt-dependent transcription and supporting CSC activity, a partnership that was abrogated by inhibiting Bcl-xL. Concordant with this, ST2+ subpopulation was targeted by MEK1/2 and Bcl-xL-specific inhibitors. These findings establish ST2 as a functional CSC marker that fortifies the Wnt signal while availing a novel therapeutic strategy to suppress GC progression by targeting the IL-33/ST2/Bcl-xL signaling axis.
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Affiliation(s)
- Jong-Wan Kwon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do, 24341, South Korea
| | - Sang-Hyuk Seok
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do, 24341, South Korea
| | - Somi Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Hyeok-Won An
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do, 24341, South Korea
| | - Anahita Dev Choudhury
- Cancer Research Institute, Kanazawa University, Kanazawa, 920-1192, Japan.,Innovative Cancer Model Research Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Sang-Ho Woo
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
| | - Jeong-Seop Oh
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
| | - Jong Kyoung Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Dominic C Voon
- Cancer Research Institute, Kanazawa University, Kanazawa, 920-1192, Japan. .,Innovative Cancer Model Research Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, 920-1192, Japan.
| | - Dae-Yong Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea.
| | - Jun Won Park
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do, 24341, South Korea.
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4
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An HW, Seok SH, Kwon JW, Choudhury AD, Oh JS, Voon DC, Kim DY, Park JW. The loss of epithelial Smad4 drives immune evasion via CXCL1 while displaying vulnerability to combinatorial immunotherapy in gastric cancer. Cell Rep 2022; 41:111878. [PMID: 36577366 DOI: 10.1016/j.celrep.2022.111878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 10/17/2022] [Accepted: 12/02/2022] [Indexed: 12/29/2022] Open
Abstract
SMAD4 is frequently mutated and inactivated in human gastric cancer (GC). Although the epithelial cell-autonomous functions of Smad4 have been extensively studied, its contribution to tumor immunity is largely undetermined. Here, we report that the loss of Smad4 expression in GC cells endows them with the ability to evade tumor immunity. Unlike their Smad4-proficient counterparts, Smad4-deficient stomach organoids can evade host immunity to form tumors in immunocompetent mice. Smad4-deficient GC cells show expanded CD133+ cancer stem-like cells while suppressing dendritic cell (DC) differentiation and cytotoxic T cells with granulocytic myeloid-derived suppressor cell (G-MDSC) accumulation through a secretome containing CXCL1. Moreover, Smad4 deficiency increases programmed cell death ligand-1 (PD-L1) and decreases 4-1BBL expressions, indicating a change in immunogenicity. Combinatorial immune checkpoint blockade (ICB) of anti-PD-L1 and anti-CTLA-4 or agonistic anti-4-1BB antibodies effectively treats ICB monotherapy-resistant Smad4-deficient allografts, exposing a specific vulnerability. Collectively, these data provide a rational basis for ICB strategies in treating advanced GC with Smad4 deficiency.
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Affiliation(s)
- Hyeok-Won An
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do 24341, South Korea
| | - Sang Hyeok Seok
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do 24341, South Korea
| | - Jong-Wan Kwon
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do 24341, South Korea
| | - Anahita Dev Choudhury
- Innovative Cancer Model Research Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Jeong-Seop Oh
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Dominic C Voon
- Innovative Cancer Model Research Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan; Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan.
| | - Dae-Yong Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
| | - Jun Won Park
- Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, 1 Kangwondaehak-gil, ChunCheon-si, Gangwon-do 24341, South Korea.
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5
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Kim M, Singh M, Lee BK, Hibbs M, Richardson K, Ellies L, Wintle L, Stuart LM, Wang JY, Voon DC, Blancafort P, Wang J, Kim J, Leedman PJ, Woo AJ. A MYC-ZNF148-ID1/3 regulatory axis modulating cancer stem cell traits in aggressive breast cancer. Oncogenesis 2022; 11:60. [PMID: 36207293 PMCID: PMC9546828 DOI: 10.1038/s41389-022-00435-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 09/17/2022] [Accepted: 09/22/2022] [Indexed: 11/13/2022] Open
Abstract
The MYC proto-oncogene (MYC) is one of the most frequently overexpressed genes in breast cancer that drives cancer stem cell-like traits, resulting in aggressive disease progression and poor prognosis. In this study, we identified zinc finger transcription factor 148 (ZNF148, also called Zfp148 and ZBP-89) as a direct target of MYC. ZNF148 suppressed cell proliferation and migration and was transcriptionally repressed by MYC in breast cancer. Depletion of ZNF148 by short hairpin RNA (shRNA) and CRISPR/Cas9 increased triple-negative breast cancer (TNBC) cell proliferation and migration. Global transcriptome and chromatin occupancy analyses of ZNF148 revealed a central role in inhibiting cancer cell de-differentiation and migration. Mechanistically, we identified the Inhibitor of DNA binding 1 and 3 (ID1, ID3), drivers of cancer stemness and plasticity, as previously uncharacterized targets of transcriptional repression by ZNF148. Silencing of ZNF148 increased the stemness and tumorigenicity in TNBC cells. These findings uncover a previously unknown tumor suppressor role for ZNF148, and a transcriptional regulatory circuitry encompassing MYC, ZNF148, and ID1/3 in driving cancer stem cell traits in aggressive breast cancer.
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Affiliation(s)
- Mijeong Kim
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Manjot Singh
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, 6027, Australia
| | - Bum-Kyu Lee
- Department of Biomedical Sciences, Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, 12144, USA
| | - Moira Hibbs
- RPH Research Centre, Royal Perth Hospital, Perth, WA, 6000, Australia
| | - Kirsty Richardson
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia
| | - Lesley Ellies
- Division of Pharmacology and Toxicology, School of Biomedical Sciences, The University of Western Australia, Perth, WA, 6000, Australia
| | - Larissa Wintle
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia
| | - Lisa M Stuart
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia
| | - Jenny Y Wang
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, 2006, Australia
| | - Dominic C Voon
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, 920-1192, Japan
- Cancer Research Institute, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Pilar Blancafort
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia
- School of Human Sciences, The University of Western Australia, Perth, WA, 6000, Australia
- The Greehey Children's Cancer Research Institute, The University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Jianlong Wang
- Department of Medicine, Columbia Center for Human Development, Columbia Stem Cell Initiative, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Jonghwan Kim
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Peter J Leedman
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia.
| | - Andrew J Woo
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth, WA, 6000, Australia.
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, 6027, Australia.
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA, 6000, Australia.
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6
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Makiyama K, Hazawa M, Kobayashi A, Lim K, Voon DC, Wong RW. NSP9 of SARS-CoV-2 attenuates nuclear transport by hampering nucleoporin 62 dynamics and functions in host cells. Biochem Biophys Res Commun 2022; 586:137-142. [PMID: 34844119 PMCID: PMC8604569 DOI: 10.1016/j.bbrc.2021.11.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/21/2021] [Accepted: 11/12/2021] [Indexed: 12/22/2022]
Abstract
Nuclear pore complexes (NPC) regulate molecular traffics on nuclear envelope, which plays crucial roles during cell fate specification and diseases. The viral accessory protein NSP9 of SARS-CoV-2 is reported to interact with nucleoporin 62 (NUP62), a structural component of the NPC, but its biological impact on the host cell remain obscure. Here, we established new cell line models with ectopic NSP9 expression and determined the subcellular destination and biological functions of NSP9. Confocal imaging identified NSP9 to be largely localized in close proximity to the endoplasmic reticulum. In agreement with the subcellular distribution of NSP9, association of NSP9 with NUP62 was observed in cytoplasm. Furthermore, the overexpression of NSP9 correlated with a reduction of NUP62 expression on the nuclear envelope, suggesting that attenuating NUP62 expression might have contributed to defective NPC formation. Importantly, the loss of NUP62 impaired translocation of p65, a subunit of NF-κB, upon TNF-α stimulation. Concordantly, NSP9 over-expression blocked p65 nuclear transport. Taken together, these data shed light on the molecular mechanisms underlying the modulation of host cells during SARS-CoV-2 infection.
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Affiliation(s)
- Kei Makiyama
- Laboratory of Molecular Cell Biology, School of Biological Science and Technology, College of Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Masaharu Hazawa
- Laboratory of Molecular Cell Biology, School of Biological Science and Technology, College of Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan; Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan; WPI Nano Life Science Institute, Kanazawa University, Kanazawa, Ishikawa, Japan.
| | - Akiko Kobayashi
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Keesiang Lim
- WPI Nano Life Science Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Dominic C Voon
- Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan; Cancer Research Institute, Kanazawa University, Ishikawa, Japan
| | - Richard W Wong
- Laboratory of Molecular Cell Biology, School of Biological Science and Technology, College of Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan; Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Ishikawa, Japan; WPI Nano Life Science Institute, Kanazawa University, Kanazawa, Ishikawa, Japan.
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7
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Park JW, Kim MS, Voon DC, Kim SJ, Bae J, Mun DG, Ko SI, Kim HK, Lee SW, Kim DY. Multi-omics analysis identifies pathways and genes involved in diffuse-type gastric carcinogenesis induced by E-cadherin, p53, and Smad4 loss in mice. Mol Carcinog 2018. [PMID: 29528141 DOI: 10.1002/mc.22803] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The molecular mechanisms underlying the pathogenesis of diffuse-type gastric cancer (DGC) have not been adequately explored due to a scarcity of appropriate animal models. A recently developed tool well suited for this line of investigation is the Pdx-1-Cre;Cdh1F/+ ;Trp53F/F ;Smad4F/F (pChe PS) mouse model that spontaneously develops metastatic DGC showing nearly complete E-cadherin loss. Here, we performed a proteogenomic analysis to uncover the molecular changes induced by the concurrent targeting of E-cadherin, p53, and Smad4 loss. The gene expression profiles of mouse DGCs and in vivo gastric phenotypes from various combinations of gene knockout demonstrated that these mutations collaborate to activate cancer-associated pathways to generate aggressive DGC. Of note, WNT-mediated epithelial-to-mesenchymal transition (EMT) and extracellular matrix (ECM)-cytokine receptor interactions were prominently featured. In particular, the WNT target gene osteopontin (OPN) that functions as an ECM cytokine is highly upregulated. In validation experiments, OPN contributed to DGC stemness by promoting cancer stem cell (CSC) survival and chemoresistance. It was further found that Bcl-xL acts as a targetable downstream effector of OPN in DGC CSC survival. In addition, Zeb2 and thymosin-β4 (Tβ4) were identified as prime candidates as suppressors of E-cadherin expression from the remaining Cdh1 allele during DGC development. Specifically, Tβ4 suppressed E-cadherin expression and anoikis while promoting cancer cell growth and migration. Collectively, these proteogenomic analyses broaden and deepen our understanding of the contribution of key driver mutations in the stepwise carcinogenesis of DGC through novel effectors, namely OPN and Tβ4.
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Affiliation(s)
- Jun Won Park
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.,National Cancer Center, Goyang, Gyeonggi, Republic of Korea
| | - Min-Sik Kim
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea.,Department of Biomedical Science and Technology, Kyung Hee Medical Science Research Institute, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Dominic C Voon
- Division of Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Su-Jin Kim
- Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, Republic of Korea
| | - Jingi Bae
- Department of Chemistry, Center for Proteogenome Research, Korea University, Seoul, Republic of Korea
| | - Dong-Gi Mun
- Department of Chemistry, Center for Proteogenome Research, Korea University, Seoul, Republic of Korea
| | - Seung-Ik Ko
- Department of Chemistry, Center for Proteogenome Research, Korea University, Seoul, Republic of Korea
| | - Hark K Kim
- National Cancer Center, Goyang, Gyeonggi, Republic of Korea
| | - Sang-Won Lee
- Department of Chemistry, Center for Proteogenome Research, Korea University, Seoul, Republic of Korea
| | - Dae-Yong Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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8
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Kotani H, Adachi Y, Kitai H, Tomida S, Bando H, Faber AC, Yoshino T, Voon DC, Yano S, Ebi H. Distinct dependencies on receptor tyrosine kinases in the regulation of MAPK signaling between BRAF V600E and non-V600E mutant lung cancers. Oncogene 2018; 37:1775-1787. [DOI: 10.1038/s41388-017-0035-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 12/30/2022]
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9
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Krishnan V, Chong YL, Tan TZ, Kulkarni M, Bin Rahmat MB, Tay LS, Sankar H, Jokhun DS, Ganesan A, Chuang LSH, Voon DC, Shivashankar GV, Thiery JP, Ito Y. TGFβ Promotes Genomic Instability after Loss of RUNX3. Cancer Res 2017; 78:88-102. [DOI: 10.1158/0008-5472.can-17-1178] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 09/11/2017] [Accepted: 10/23/2017] [Indexed: 11/16/2022]
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10
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Voon DC, Huang RY, Jackson RA, Thiery JP. The EMT spectrum and therapeutic opportunities. Mol Oncol 2017; 11:878-891. [PMID: 28544151 PMCID: PMC5496500 DOI: 10.1002/1878-0261.12082] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/12/2017] [Accepted: 05/18/2017] [Indexed: 12/18/2022] Open
Abstract
Carcinomas are phenotypically arrayed along an epithelial–mesenchymal transition (EMT) spectrum, a developmental program currently exploited to understand the acquisition of drug resistance through a re‐routing of growth factor signaling. This review collates the current approaches employed in developing therapeutics against cancer‐associated EMT, and provides an assessment of their respective strengths and drawbacks. We reflect on the close relationship between EMT and chemoresistance against current targeted therapeutics, with a special focus on the epigenetic mechanisms that link these processes. This prompts the hypothesis that carcinoma‐associated EMT shares a common epigenetic pathway to cellular plasticity as somatic cell reprogramming during tissue repair and regeneration. Indeed, their striking resemblance suggests that EMT in carcinoma is a pathological adaptation of an intrinsic program of cellular plasticity that is crucial to tissue homeostasis. We thus propose a revised approach that targets the epigenetic mechanisms underlying pathogenic EMT to arrest cellular plasticity regardless of upstream cancer‐driving mutations.
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Affiliation(s)
- Dominic C Voon
- Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan.,Division of Genetics, Cancer Research Institute, Kanazawa University, Ishikawa, Japan
| | - Ruby Y Huang
- Department of Obstetrics & Gynaecology, National University Hospital, Singapore, Singapore.,Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Rebecca A Jackson
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jean P Thiery
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Inserm Unit 1186 Comprehensive Cancer Center, Institut Gustave Roussy, Villejuif, France.,CNRS UMR 7057 Matter and Complex Systems, University Paris Denis Diderot, Paris, France
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11
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Salto-Tellez M, Peh BK, Ito K, Tan SH, Chong PY, Han HC, Tada K, Ong WY, Soong R, Voon DC, Ito Y. RUNX3 protein is overexpressed in human basal cell carcinomas. Oncogene 2006; 25:7646-9. [PMID: 16767156 DOI: 10.1038/sj.onc.1209739] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Basal cell carcinomas (BCC), which are the most common form of skin malignancy, are invariably associated with the deregulation of the Sonic Hedgehog (Shh) signalling pathway. As such, BCC represent a unique model for the study of interactions of the Shh pathway with other genes and pathways. We constructed a tissue microarray (TMA) of 75 paired BCC and normal skin and analysed the expression of beta-catenin and RUNX3, nuclear effectors of the wingless-Int (Wnt) and bone morphogenetic protein/transforming growth factor-beta pathways, respectively. In line with previous reports, we observed varying subcellular expression pattern of beta-catenin in BCC, with 31 cases (41%) showing nuclear accumulation. In contrast, all the BCC cases tested by the TMA showed RUNX3 protein uniformly overexpressed in the nuclei of the cancer cells. Analysis by Western blotting and DNA sequencing indicates that the overexpressed protein is normal and full-length, containing no mutation in the coding region, implicating RUNX3 as an oncogene in certain human cancers. Our results indicate that although the deregulation of Wnt signalling could contribute to the pathogenesis of a subset of BCC, RUNX3 appears to be a universal downstream mediator of a constitutively active Shh pathway in BCC.
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Affiliation(s)
- M Salto-Tellez
- Department of Pathology, National University Hospital, Yong Loo Lin Medical School, National University of Singapore (NUS), Singapore, Singapore
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12
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Voon DC, Subrata LS, Baltic S, Leu MP, Whiteway JM, Wong A, Knight SA, Christiansen FT, Daly JM. Use of mRNA- and protein-destabilizing elements to develop a highly responsive reporter system. Nucleic Acids Res 2005; 33:e27. [PMID: 15716309 PMCID: PMC549429 DOI: 10.1093/nar/gni030] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Reporter assays are widely used in applications that require measurement of changes in gene expression over time (e.g. drug screening). With standard reporter vectors, the measurable effect of a treatment or compound (altered reporter activity) is substantially diluted and delayed, compared with its true effect (altered transcriptional activity). This problem is caused by the relatively long half-lives of both the reporter protein and its mRNA. As a result, the activities of compounds, ligands or treatments that have a relatively minor effect, or a substantial but transient effect, often remain undetected. To circumvent this problem, we introduced modular protein- and mRNA-destabilizing elements into a range of commonly used reporters. Our data show that both elements are required for maximal responses to both increases and decreases in transcriptional activity. The double-destabilized reporter vectors showed markedly improved performance in drug screening, kinetic assays and dose–response titrations.
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Affiliation(s)
- Dominic C. Voon
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
| | - Lily S. Subrata
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
| | - Svetlana Baltic
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
| | - Marco P. Leu
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
| | - Joanna M. Whiteway
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
- School of Surgery and Pathology, The University of Western AustraliaCrawley WA 6009, Australia
| | - Agnes Wong
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
- School of Surgery and Pathology, The University of Western AustraliaCrawley WA 6009, Australia
| | - Samuel A. Knight
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
| | - Frank T. Christiansen
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
- School of Surgery and Pathology, The University of Western AustraliaCrawley WA 6009, Australia
| | - John M. Daly
- GeneStream Pty Ltd96 Chipping Road, City Beach, WA 6015, Australia
- Department of Clinical Immunology and Biochemical Genetics, Royal Perth HospitalWellington Street, Perth WA 6000, Australia
- To whom correspondence should be addressed. Tel/Fax: +61 8 92051149;
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13
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Voon DC, Subrata LS, Karimi M, Ulgiati D, Abraham LJ. TNF and phorbol esters induce lymphotoxin-beta expression through distinct pathways involving Ets and NF-kappa B family members. J Immunol 2004; 172:4332-41. [PMID: 15034048 DOI: 10.4049/jimmunol.172.7.4332] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Lymphotoxin-beta (LT-beta) is a transmembrane protein expressed mainly on cells of the lymphoid lineage. It associates with LT-alpha on the cell surface to form the heterotrimeric LTalpha1,beta2 complex, which binds the LT-beta receptor. Membrane lymphotoxin is a crucial signal for the appropriate development of lymph nodes and Peyer's patches, and in the formation of B and T cell compartments in the spleen. In this study we report the characterization of mechanisms governing both basal as well as PMA- and TNF-inducible regulation of the human LT-beta promoter. Using a Jurkat T cell line, induction with either PMA or TNF resulted in an increase in mRNA levels compared with uninduced values. This induction corresponded to an increase in transcriptional activity of the human LT-beta promoter. Mutational and deletion analysis demonstrated the importance of Ets and NF-kappaB motifs in the regulation of basal transcription. Furthermore, the ability of PMA to induce activity was lost in the Ets mutant constructs. Interestingly, the same mutation had little effect on the ability of TNF to induce transcription of the LT-beta promoter. TNF inducibility was localized to the NF-kappaB site positioned at -83 of the promoter sequence. Thus, it appears that the Ets site, although playing a major role in PMA induction, did not mediate TNF inducibility. Therefore, our study suggests that alternative signaling pathways may be present to induce the expression of LT-beta in response to different immunological or inflammatory stimuli.
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Affiliation(s)
- Dominic C Voon
- Biochemistry and Molecular Biology, School of Biomedical and Chemical Sciences and the Center for Medical Research, University of Western Australia, Crawley, Western Australia, Australia
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14
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Giles KM, Daly JM, Beveridge DJ, Thomson AM, Voon DC, Furneaux HM, Jazayeri JA, Leedman PJ. The 3'-untranslated region of p21WAF1 mRNA is a composite cis-acting sequence bound by RNA-binding proteins from breast cancer cells, including HuR and poly(C)-binding protein. J Biol Chem 2003; 278:2937-46. [PMID: 12431987 DOI: 10.1074/jbc.m208439200] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Despite promoting growth in many cell types, epidermal growth factor (EGF) induces growth inhibition in a variety of cancer cells that overexpress its receptor. The cyclin-dependent kinase inhibitor p21(WAF1) is a central component of this pathway. We found in human MDA-468 breast cancer cells that EGF up-regulates p21(WAF1) mRNA and protein, through a combination of increased mRNA stability and transcription. The decay rate of a hybrid luciferase reporter full-length p21(WAF1) 3'-untranslated region (UTR) mRNA was significantly faster than that of a control mRNA. Transfections with a variety of p21(WAF1) 3'-UTR constructs identified multiple cis-acting elements capable of reducing basal reporter activity. Short wavelength ultraviolet light induced reporter activity in constructs containing the 5' region of the p21(WAF1) 3'-UTR, whereas EGF induced reporter activity in constructs containing sequences 3' of the UVC-responsive region. These cis-elements bound multiple proteins from MDA-468 cells, including HuR and poly(C)-binding protein 1 (CP1). Immunoprecipitation studies confirmed that HuR and CP1 associate with p21(WAF1) mRNA in MDA-468 cells. Over- and underexpression of HuR in MDA-468 cells did not affect EGF-induced p21(WAF1) protein expression or growth inhibition. However, binding of HuR to its target 3'-UTR cis-element was regulated by UVC but not by EGF, suggesting that these stimuli modulate the stability of p21(WAF1) mRNA via different mechanisms. We conclude that EGF-induced p21(WAF1) protein expression is mediated largely by stabilization of p21(WAF1) mRNA elicited via multiple 3'-UTR cis-elements. Although HuR binds at least one of these elements, it does not appear to be a major modulator of p21(WAF1) expression or growth inhibition in this system. CP1 is a novel p21(WAF1) mRNA-binding protein that may function cooperatively with other mRNA-binding proteins to regulate p21(WAF1) mRNA stability.
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Affiliation(s)
- Keith M Giles
- Laboratory for Cancer Medicine and University Department of Medicine, Western Australian Institute for Medical Research and Centre for Medical Research, the University of Western Australia, Perth, Western Australia 6001, Australia
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15
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Yeap BB, Voon DC, Vivian JP, McCulloch RK, Thomson AM, Giles KM, Czyzyk-Krzeska MF, Furneaux H, Wilce MCJ, Wilce JA, Leedman PJ. Novel binding of HuR and poly(C)-binding protein to a conserved UC-rich motif within the 3'-untranslated region of the androgen receptor messenger RNA. J Biol Chem 2002; 277:27183-92. [PMID: 12011088 DOI: 10.1074/jbc.m202883200] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The androgen receptor (AR) mediates androgen action and plays a central role in the proliferation of specific cancer cells. We demonstrated recently that AR mRNA stability is a major determinant of AR gene expression in prostate and breast cancer cells and that androgens differentially regulate AR mRNA decay dependent on cell type (Yeap, B. B., Kreuger, R. G., Leedman, P. J. (1999) Endocrinology 140, 3282-3291). Here, we have identified a highly conserved UC-rich region in the 3-untranslated region of AR mRNA that contains a 5'-C(U)(n)C motif and a 3'-CCCUCCC poly(C)-binding protein motif. In transfection studies with LNCaP human prostate cancer cells, the AR UC-rich region reduced expression of a luciferase reporter gene. The AR UC-rich region was a target for cytoplasmic and nuclear RNA-binding proteins from human prostate and breast cancer cells as well as human testicular and breast cancer tissue. One of these proteins is HuR, a ubiquitously expressed member of the Elav/Hu family of RNA-binding proteins involved in the stabilization of several mRNAs. Poly(C)-binding protein-1 and -2 (CP1 and CP2), previously implicated in the control of mRNA turnover and translation, also bound avidly to the UC-rich region. Mutational analysis of the UC-rich region identified specific binding motifs for both HuR and the CPs. HuR and CP1 bound simultaneously to the UC-rich RNA and in a cooperative manner. Immunoprecipitation studies confirmed that each of these proteins associated with AR mRNA in prostate cancer cells. In summary, we have identified and characterized a novel complex of AR mRNA-binding proteins that target the highly conserved UC-rich region. The binding of HuR, CP1, and CP2 to AR mRNA suggests a role for each of these proteins in the post-transcriptional regulation of AR expression in cancer cells.
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Affiliation(s)
- Bu B Yeap
- Laboratory for Cancer Medicine, Western Australian Institute for Medical Research, University Department of Medicine, University of Western Australia, 50 Murray Street, Perth, WA 6000, Australia
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16
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Voon DC, Subrata LS, Abraham LJ. Regulation of lymphotoxin-beta by tumor necrosis factor, phorbol myristate acetate, and ionomycin in Jurkat T cells. J Interferon Cytokine Res 2001; 21:921-30. [PMID: 11747624 DOI: 10.1089/107999001753289532] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Lymphotoxin-beta (LT- beta) is a tumor necrosis factor (TNF)-related membrane-bound cytokine that forms a heterotrimeric surface lymphotoxin (LT) complex with LT-alpha on the surface of lymphoid cells. Although knockout studies have revealed a role in lymph node biogenesis during development, the regulation and function of surface LT in mature cell types are poorly understood. The present study aims to understand the physiologic signals that regulate the components of surface LT in Jurkat T cells. We show that the previously observed upregulation of surface LT by phorbol myristate acetate (PMA) is markedly abrogated by cotreatment with ionomycin through posttranscriptional mechanisms. In addition, the observation of striking similarities between the mRNA accumulation kinetics of LT-alpha and LT-beta during these treatments indicates tight coupling of expression under certain conditions. In investigating the reported upregulation of LT-beta during inflammation, we tested the effects of various proinflammatory and anti-inflammatory cytokines on LT-beta expression. Our data demonstrate an upregulation of LT-beta mRNA by the inflammatory cytokines TNF and LT-alpha.
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Affiliation(s)
- D C Voon
- of Biochemistry, The University of Western Australia, Crawley, Western Australia, Australia
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17
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Colley SM, Chappell DS, Busfield SJ, Voon DC, Klinken SP. Karyotypic abnormalities associated with haemopoietic lineage switching are not linked with mutations to p53. Int J Biochem Cell Biol 2000; 32:509-17. [PMID: 10736566 DOI: 10.1016/s1357-2725(00)00004-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Leukemic cells can undergo lineage switching to display the phenotypic features of another haemopoietic pathway, as exemplified by B lymphoma and erythroleukemic cell lines generating variants with a monocytic appearance. Unlike the diploid parental lines, the vast majority of myeloid derivative lines examined (12 of 13 lines) were aneuploid. As p53 is involved in the maintenance of chromosomal stability, we investigated the role of p53 in the emergence of abnormal karyotypes in cells which had undergone lineage switching. Single strand conformation polymorphism and sequence analysis of cDNA, together with protein immunoprecipitations, were used to assess the p53 status of parental and variant cell lines. Unexpectedly, four or five monocytic lines with chromosomal alterations contained wild type p53. Conversely, a p53 point mutation found in one aneuploid monocytic line was also present in the diploid parental pre-B cell. These results provide strong evidence that mechanisms other than p53 mutations are responsible for karyotypic abnormalities seen in cells that have undergone lineage switching.
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Affiliation(s)
- S M Colley
- Department of Biochemistry, University of Western Australia, Royal Perth Hospital, Perth, Australia
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