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Basu J, Olsson A, Ferchen K, Titerina EK, Chetal K, Nicolas E, Czyzewicz P, Levchenko D, Ge L, Hua X, Grimes HL, Salomonis N, Kappes DJ. ThPOK is a critical multifaceted regulator of myeloid lineage development. Nat Immunol 2023; 24:1295-1307. [PMID: 37474652 PMCID: PMC10792516 DOI: 10.1038/s41590-023-01549-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 06/06/2023] [Indexed: 07/22/2023]
Abstract
The transcription factor ThPOK (encoded by Zbtb7b) is well known for its role as a master regulator of CD4 lineage commitment in the thymus. Here, we report an unexpected and critical role of ThPOK as a multifaceted regulator of myeloid lineage commitment, differentiation and maturation. Using reporter and knockout mouse models combined with single-cell RNA-sequencing, progenitor transfer and colony assays, we show that ThPOK controls monocyte-dendritic cell versus granulocyte lineage production during homeostatic differentiation, and serves as a brake for neutrophil maturation in granulocyte lineage-specified cells through transcriptional regulation of lineage-specific transcription factors and RNA via altered messenger RNA splicing to reprogram intron retention.
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Affiliation(s)
- Jayati Basu
- Fox Chase Cancer Center, Philadelphia, PA, USA.
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.
| | - Andre Olsson
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Kyle Ferchen
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Elizaveta K Titerina
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Kashish Chetal
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | | | | | | | - Lu Ge
- Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Xiang Hua
- Fox Chase Cancer Center, Philadelphia, PA, USA
| | - H Leighton Grimes
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Nathan Salomonis
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA.
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2
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de Araújo Vieira LF, Lins MP, Porto FL, Smaniotto S, Dos Santos Reis MD. IGF-1 increases survival of CD4 + lineage in a 2D model of thymocyte/thymic stromal cell co-culture. In Vitro Cell Dev Biol Anim 2022; 58:877-885. [PMID: 36401120 DOI: 10.1007/s11626-022-00730-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/30/2022] [Indexed: 11/19/2022]
Abstract
Insulin-like growth factor-1 (IGF-1), in addition to its classic effects on cell proliferation and organism growth, has pleiotropic actions on the immune system, particularly on the thymus. Thus, the objective of this study was to evaluate the influence of IGF-1 on molecules involved in the survival of thymocytes in vitro using a co-culture system with thymic stromal cells obtained from C57BL/6 mice. The obtained thymic stroma has contained thymic epithelial cells, macrophages, dendritic cells, fibroblasts, and preserved the expression of the major histocompatibility complex (MHC) molecules. Fresh thymocytes were added to these cultures and the co-culture were treated daily with IGF-1 (100 ng/mL) for 3 days. In this scheme, the viability of the thymocytes was about 70%, either in the control (non-treated cells) or in the IGF-1-treated cultures. It was found that IGF-1 was able to increase the percentage of thymocytes from the CD4+ single-positive (SP) subset. This result was accompanied by an increase in the MHC II expression on thymic stromal cells and an augment on the interleukin-7 receptor (CD127) on the surface of the CD4 SP thymocytes after treatment with IGF-1. Finally, IGF-1 treatment increased the expression of the ThPOK encoding gene Zbtb7b, which is involved in the differentiation of CD4+ SP thymocytes. Our study demonstrates the participation of IGF-1 in the thymocyte/thymic stroma interactions, especially in the extended survival of the CD4+ lineage in the thymus.
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Affiliation(s)
- Larissa Fernanda de Araújo Vieira
- Laboratory of Cell Biology, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió, Alagoas, 57072-970, Brazil
| | - Marvin Paulo Lins
- Laboratory of Cell Biology, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió, Alagoas, 57072-970, Brazil. .,Brazilian National Institute of Science and Technology On Neuroimmunomodulation (INCT-NIM), Rio de Janeiro, Brazil.
| | - Felipe Lima Porto
- Laboratory of Cell Biology, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió, Alagoas, 57072-970, Brazil
| | - Salete Smaniotto
- Laboratory of Cell Biology, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió, Alagoas, 57072-970, Brazil.,Brazilian National Institute of Science and Technology On Neuroimmunomodulation (INCT-NIM), Rio de Janeiro, Brazil
| | - Maria Danielma Dos Santos Reis
- Laboratory of Cell Biology, Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió, Alagoas, 57072-970, Brazil.,Brazilian National Institute of Science and Technology On Neuroimmunomodulation (INCT-NIM), Rio de Janeiro, Brazil
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3
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Xu HM, Xu J, Yang MF, Liang YJ, Peng QZ, Zhang Y, Tian CM, Nie YQ, Wang LS, Yao J, Li DF. Epigenetic DNA methylation of Zbtb7b regulates the population of double-positive CD4 +CD8 + T cells in ulcerative colitis. J Transl Med 2022; 20:289. [PMID: 35761286 PMCID: PMC9235105 DOI: 10.1186/s12967-022-03477-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 06/11/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND AND AIMS Ulcerative colitis (UC) is a heterogeneous disorder with complex pathogenesis. Therefore, in the present study, we aimed to assess genome-wide DNA methylation changes associated explicitly with the pathogenesis of UC. METHODS DNA methylation changes were identified by comparing UC tissues with healthy controls (HCs) from the GEO databases. The candidate genes were obtained and verified in clinical samples. Moreover, the underlying molecular mechanism related to Zbtb7b in the pathogenesis of UC was explored using the dextran sodium sulfate (DSS)-induced colitis model. RESULTS Bioinformatic analysis from GEO databases confirmed that Zbtb7b, known as Th-inducing POZ-Kruppel factor (ThPOK), was demethylated in UC tissues. Then, we demonstrated that Zbtb7b was in a hypo-methylation pattern through the DSS-induced colitis model (P = 0.0357), whereas the expression of Zbtb7b at the mRNA and protein levels was significantly up-regulated in the inflamed colonic tissues of UC patients (qRT-PCR, WB, IHC: P < 0.0001, P = 0.0079, P < 0.0001) and DSS-induced colitis model (qRT-PCR, WB, IHC: P < 0.0001, P = 0.0045, P = 0.0004). Moreover, the expression of Zbtb7b was positively associated with the degree of UC activity. Mechanically, over-expression of Zbtb7b might activate the maturation of CD4+T cells (FCM, IF: P = 0.0240, P = 0.0003) and repress the differentiation of double-positive CD4+CD8+T (DP CD4+CD8+T) cells (FCM, IF: P = 0.0247, P = 0.0118), contributing to the production of inflammatory cytokines, such as TNF-α (P = 0.0005, P = 0.0005), IL-17 (P = 0.0014, P = 0.0381), and IFN-γ (P = 0.0016, P = 0.0042), in the serum and colonic tissue of DSS-induced colitis model. CONCLUSIONS Epigenetic DNA hypo-methylation of Zbtb7b activated the maturation of CD4+T cells and repressed the differentiation of DP CD4+CD8+ T cells, resulting in the production of inflammatory cytokines and colonic inflammation in UC. Therefore, Zbtb7b might be a diagnostic and therapeutic biomarker for UC, and hypo-methylation might affect the biological function of Zbtb7b.
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Affiliation(s)
- Hao-Ming Xu
- Department of Gastroenterology and Hepatology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Yuexiu District, No. 1, Panfu Road, Guangzhou, 510180, Guangdong, China
| | - Jing Xu
- Department of Gastroenterology and Hepatology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Yuexiu District, No. 1, Panfu Road, Guangzhou, 510180, Guangdong, China
| | - Mei-Feng Yang
- Department of Hematology, Yantian District People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Yu-Jie Liang
- Shenzhen Kangning Hospital, Shenzhen, 518020, Guangdong, China
| | - Quan-Zhou Peng
- Department of Pathology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518020, Guangdong, China
| | - Yuan Zhang
- Department of Medical Administration, Huizhou Institute of Occupational Diseases Control and Prevention, Huizhou, 516000, Guangdong, China
| | - Cheng-Mei Tian
- Department of Emergency, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518020, Guangdong, China
| | - Yu-Qiang Nie
- Department of Gastroenterology and Hepatology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Yuexiu District, No. 1, Panfu Road, Guangzhou, 510180, Guangdong, China.
| | - Li-Sheng Wang
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Luohu District, No. 1017, Dongmen North Road, Shenzhen, 518020, Guangdong, China.
| | - Jun Yao
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Luohu District, No. 1017, Dongmen North Road, Shenzhen, 518020, Guangdong, China.
| | - De-Feng Li
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Luohu District, No. 1017, Dongmen North Road, Shenzhen, 518020, Guangdong, China.
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4
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Gao Y, Zamisch M, Vacchio M, Chopp L, Ciucci T, Paine EL, Lyons GC, Nie J, Xiao Q, Zvezdova E, Love PE, Vinson CR, Jenkins LM, Bosselut R. NuRD complex recruitment to Thpok mediates CD4 + T cell lineage differentiation. Sci Immunol 2022; 7:eabn5917. [PMID: 35687698 DOI: 10.1126/sciimmunol.abn5917] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Although BTB-zinc finger (BTB-ZF) transcription factors control the differentiation of multiple hematopoietic and immune lineages, how they function is poorly understood. The BTB-ZF factor Thpok controls intrathymic CD4+ T cell development and the expression of most CD4+ and CD8+ lineage genes. Here, we identify the nucleosome remodeling and deacetylase (NuRD) complex as a critical Thpok cofactor. Using mass spectrometry and coimmunoprecipitation in primary T cells, we show that Thpok binds NuRD components independently of DNA association. We locate three amino acid residues within the Thpok BTB domain that are required for both NuRD binding and Thpok functions. Conversely, a chimeric protein merging the NuRD component Mta2 to a BTB-less version of Thpok supports CD4+ T cell development, indicating that NuRD recruitment recapitulates the functions of the Thpok BTB domain. We found that NuRD mediates Thpok repression of CD8+ lineage genes, including the transcription factor Runx3, but is dispensable for Cd4 expression. We show that these functions cannot be performed by the BTB domain of the Thpok-related factor Bcl6, which fails to bind NuRD. Thus, cofactor binding critically contributes to the functional specificity of BTB-ZF factors, which control the differentiation of most hematopoietic subsets.
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Affiliation(s)
- Yayi Gao
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Monica Zamisch
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Melanie Vacchio
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Laura Chopp
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA.,Immunology Graduate Group, University of Pennsylvania Medical School, Philadelphia, PA, USA
| | - Thomas Ciucci
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Elliott L Paine
- Collaborative Protein Technology Resource, Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Gaelyn C Lyons
- Collaborative Protein Technology Resource, Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Jia Nie
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Qi Xiao
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
| | - Ekaterina Zvezdova
- Section on Hematopoiesis and Lymphocyte Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD, USA
| | - Paul E Love
- Section on Hematopoiesis and Lymphocyte Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD, USA
| | - Charles R Vinson
- Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Lisa M Jenkins
- Immunology Graduate Group, University of Pennsylvania Medical School, Philadelphia, PA, USA
| | - Rémy Bosselut
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA
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5
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Chen Y, Jiang L, Xia L, Zhang G, Chen L. ThPOK inhibits the immune escape of gastric cancer cells by inducing STPG1 to inactivate the ERK pathway. BMC Immunol 2022; 23:16. [PMID: 35379170 PMCID: PMC8981657 DOI: 10.1186/s12865-022-00485-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 02/24/2022] [Indexed: 12/24/2022] Open
Abstract
Background Gastric cancer is the second most frequently diagnosed cancer worldwide. Weak immunogenicity helps cancer cells escape from immune elimination and grow into predominant subpopulations. This study aimed to investigate the effect of Zinc finger and BTB domain containing 7B (Zbtb7b, Alias ThPOK) on T cell activation after coculture with gastric cancer cells. Methods Cell Counting Kit-8 assay (CCK-8) was performed to explore the viability of gastric cancer cells. Flow cytometry analysis was used to measure CD3+ T cell proliferation and the ratio of activated IFN-γ+ T cells which were co-incubated with gastric cancer cells (HGC-27, SNU-1). The binding between ThPOK and the promoter of its target sperm tail PG-rich repeat containing 1 (STPG1) was explored using ChIP and luciferase reporter assays. Relative gene expression was quantified using RT-qPCR. Results ThPOK was expressed at a low level in gastric cancer tissues and cells at mRNA and protein levels. Gastric cancer patients with lower ThPOK expression had poorer prognosis. ThPOK overexpression suppressed gastric cancer cell viability and increased T cell activation. ThPOK served as a transcription factor for STPG1. STPG1 expression was also at a low level in the tissues and cells of gastric cancer. ThPOK positively regulated the mRNA and protein levels of STPG1 in gastric cancer cells. Moreover, ThPOK was demonstrated to bind with STPG1 promoter. STPG1 upregulation also exerted inhibitory effects on gastric cancer cell viability and T cell activation. Additionally, ThPOK and STPG1 were revealed to inactivate the ERK pathway in gastric cancer cells. Conclusion ThPOK inhibits gastric cancer cell viability and increases T cell activation by inducing STPG1 to inactivate the ERK pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s12865-022-00485-5.
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Affiliation(s)
- Ying Chen
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, 168 Hongkong Road, Jiang'an District, Wuhan, 430015, Hubei, China
| | - Lili Jiang
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, 168 Hongkong Road, Jiang'an District, Wuhan, 430015, Hubei, China
| | - Lingli Xia
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, 168 Hongkong Road, Jiang'an District, Wuhan, 430015, Hubei, China
| | - Gang Zhang
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, 168 Hongkong Road, Jiang'an District, Wuhan, 430015, Hubei, China
| | - Lan Chen
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, 168 Hongkong Road, Jiang'an District, Wuhan, 430015, Hubei, China.
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6
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Zou W, Izawa T, Rohatgi N, Zou SY, Li Y, Teitelbaum SL. ThPOK
inhibits osteoclast formation via
NFATc1
transcription and function. JBMR Plus 2022; 6:e10613. [PMID: 35434449 PMCID: PMC9009119 DOI: 10.1002/jbm4.10613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/20/2022] [Accepted: 02/16/2022] [Indexed: 11/26/2022] Open
Abstract
Both LRF (Zbtb7a) and ThPOK (Zbtb7b) belong to the POK (BTB/POZ and Kruppel) family of transcription repressors that participate in development, differentiation, and oncogenesis. Although LRF mediates osteoclast differentiation by regulating NFATc1 expression, the principal established function of ThPOK is transcriptional control of T‐cell lineage commitment. Whether ThPOK affects osteoclast formation or function is not known. We find that marrow macrophage ThPOK expression diminishes with exposure to receptor activator of NF‐kB ligand (RANKL), but ThPOK deficiency does not affect osteoclast differentiation. On the other hand, enhanced ThPOK, in macrophages, substantially impairs osteoclastogenesis. Excess ThPOK binds the NFATc1 promoter and suppresses its transcription, suggesting a mechanism for its osteoclast inhibitory effect. Despite suppression of osteoclastogenesis by excess ThPOK being associated with diminished NFATc1, osteoclast formation is not rescued by NFATc1 overexpression. Thus, ThPOK appears to inhibit NFATc1 transcription and its osteoclastogenic capacity, while its depletion has no effect on the bone‐resorptive cell. © 2022 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Wei Zou
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
| | - Takashi Izawa
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
- Department of Orthodontics Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2‐5‐1 Shikata‐cho, Kita‐ku Okayama Japan
| | - Nidhi Rohatgi
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
| | - Steven Y. Zou
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
| | - Yongjia Li
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
- Department of Pharmacology Jiangsu University School of Medicine Zhenjiang Jiangsu Province PR China
| | - Steven L. Teitelbaum
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA
- Division of Bone and Mineral Diseases, Department of Medicine Washington University School of Medicine St. Louis MO USA
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7
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Egawa T. A Fateful Decision in the Thymus Controlled by the Transcription Factor ThPOK. THE JOURNAL OF IMMUNOLOGY 2021; 206:1981-1982. [PMID: 33879577 DOI: 10.4049/jimmunol.2100157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Takeshi Egawa
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO
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8
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Xia L, Jiang L, Chen Y, Zhang G, Chen L. ThPOK transcriptionally inactivates TNFRSF12A to increase the proliferation of T cells with the involvement of the NF-kB pathway. Cytokine 2021; 148:155658. [PMID: 34353698 DOI: 10.1016/j.cyto.2021.155658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/05/2021] [Accepted: 07/19/2021] [Indexed: 01/20/2023]
Abstract
Gastric cancer (GC), originated from gastric mucosa, is a malignant tumor causing numerous deaths globally. The present study used the coculture of T cells with supernatant of the GC cells (HGC-27, SNU-1) and investigated the function and regulatory mechanism of Zinc finger and BTB domain containing 7B (ZBTB7B, alias ThPOK) on T cell proliferation. Flow cytometry analysis was used to measure the proliferation of CD3+ T cells and IFN-γ+ T cells. We found that low level of ThPOK was associated with poor prognosis in GC patients. ThPOK was lowly expressed in GC cells at the mRNA and protein levels. ThPOK overexpression inhibited GC cell viability and promoted proliferation of T cells. ThPOK was identified to function as a transcription factor for TNFRSF12A. TNFRSF12A was upregulated in GC tissues and cells and high level of TNFRSF12A was associated with poor prognosis in GC patients. ThPOK knockdown elevated TNFRSF12A level in GC cells. ThPOK was revealed to bind with the promoter of TNFRSF12A. TNFRSF12A silencing also inhibited GC cell viability and promoted T cell activation and proliferation. Additionally, ThPOK was demonstrated to inactivate the NF-kB pathway by downregulating TNFRSF12A in GC cells. Overall, ThPOK suppresses cell viability in GC and increases the activation and proliferation of T cells by targeting TNFRSF12A to inactivate the NF-kB pathway.
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Affiliation(s)
- Lingli Xia
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, Wuhan 430015, Hubei, China
| | - Lili Jiang
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, Wuhan 430015, Hubei, China
| | - Ying Chen
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, Wuhan 430015, Hubei, China
| | - Gang Zhang
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, Wuhan 430015, Hubei, China
| | - Lan Chen
- Department of Gastroenterology, The Sixth Hospital of Wuhan, Affiliated Hospital of Jianghan University, Wuhan 430015, Hubei, China.
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9
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Cheng ZY, He TT, Gao XM, Zhao Y, Wang J. ZBTB Transcription Factors: Key Regulators of the Development, Differentiation and Effector Function of T Cells. Front Immunol 2021; 12:713294. [PMID: 34349770 PMCID: PMC8326903 DOI: 10.3389/fimmu.2021.713294] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 07/06/2021] [Indexed: 12/12/2022] Open
Abstract
The development and differentiation of T cells represents a long and highly coordinated, yet flexible at some points, pathway, along which the sequential and dynamic expressions of different transcriptional factors play prominent roles at multiple steps. The large ZBTB family comprises a diverse group of transcriptional factors, and many of them have emerged as critical factors that regulate the lineage commitment, differentiation and effector function of hematopoietic-derived cells as well as a variety of other developmental events. Within the T-cell lineage, several ZBTB proteins, including ZBTB1, ZBTB17, ZBTB7B (THPOK) and BCL6 (ZBTB27), mainly regulate the development and/or differentiation of conventional CD4/CD8 αβ+ T cells, whereas ZBTB16 (PLZF) is essential for the development and function of innate-like unconventional γδ+ T & invariant NKT cells. Given the critical role of T cells in host defenses against infections/tumors and in the pathogenesis of many inflammatory disorders, we herein summarize the roles of fourteen ZBTB family members in the development, differentiation and effector function of both conventional and unconventional T cells as well as the underlying molecular mechanisms.
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Affiliation(s)
- Zhong-Yan Cheng
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Ting-Ting He
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Xiao-Ming Gao
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Ying Zhao
- Department of Pathophysiology, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Jun Wang
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
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10
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Liang C, Niu L, Xiao Z, Zheng C, Shen Y, Shi Y, Han X. Whole-genome sequencing of prostate cancer reveals novel mutation-driven processes and molecular subgroups. Life Sci 2019; 254:117218. [PMID: 31884093 DOI: 10.1016/j.lfs.2019.117218] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 12/02/2019] [Accepted: 12/19/2019] [Indexed: 01/27/2023]
Abstract
Prostate cancer (PCa) is the second most frequently diagnosed cancer in men. However, its genetic characteristics in the Chinese population have not been extensively profiled. Here we screened 27 Chinese patients and preformed whole-genome sequencing to dissect their genomic patterns. We found that 18.5% (5/27) tumors harbored non-protein coding mutations on FOXA1. Besides, novel focal amplifications/deletions involving ZBTB7B, SLC4A4, TBX18, CYSLTR2 and EFNA5 were frequently present in tumors. Notably, group specificity of base substitution signature B displayed a strong link to hotspot mutations on SPOP gene. Furthermore, based on six rearrangement signatures, tumors were assigned to five subgroups that revealed different biological mechanisms. Of which, tandem duplicator subgroup harbored all CDK12 mutations, small deletor subgroup owned 75% TP53 changes, and large deletor subgroup had 66.7% SPOP mutations. Taken together, we provide a comprehensive view of genomic patterns which affect the critical cell regulators of PCa in the Chinese population. Our findings may provide valuable insights for designing specific treatments for Chinese patients with PCa.
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Affiliation(s)
- Caixia Liang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Lijuan Niu
- Department of Ultrasound, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Zejun Xiao
- Department of Urinary Surgery, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Cuiling Zheng
- Department of Clinical Laboratory, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yinchen Shen
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yuankai Shi
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.
| | - Xiaohong Han
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China; Department of Clinical Laboratory, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.
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11
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Zeidan N, Damen H, Roy DC, Dave VP. Critical Role for TCR Signal Strength and MHC Specificity in ThPOK-Induced CD4 Helper Lineage Choice. THE JOURNAL OF IMMUNOLOGY 2019; 202:3211-3225. [PMID: 31036767 DOI: 10.4049/jimmunol.1801464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 03/26/2019] [Indexed: 01/08/2023]
Abstract
Sustained TCR signaling is critical for ThPOK induction in MHC class II (MHCII)-signaled thymocytes leading to the CD4 helper lineage commitment. ThPOK suppresses the cytotoxic program in the signaled thymocytes and is shown to be necessary and sufficient for the CD4 helper lineage choice. Accordingly, loss and gain of ThPOK function redirects MHCII- and MHC class I (MHCI)-signaled thymocytes into the CD8 cytotoxic and CD4 helper lineage, respectively. However, the impact of a defined ThPOK level on the CD4 helper lineage choice of MHCII- and MHCI-specific thymocytes and the role of TCR signaling in this process is not evaluated. Equally, it is not clear if suppression of the cytotoxic program by ThPOK is sufficient in redirecting MHCI-restricted thymocytes into the CD4 helper lineage. In this study, we have investigated CD8 to CD4 helper lineage redirection in three independent ThPOK overexpressing transgenic mouse lines. Our analysis shows that one of the transgenic lines, despite overexpressing ThPOK compared with wild-type CD4 mature T cells and compromising cytotoxic program, failed to redirect all MHCI-signaled thymocytes into the CD4 helper lineage, resulting in the continued presence of CD8+ mature T cells and the generation of a large number of double negative mature T cells. Critically, the same ThPOK transgene completely restored the CD4 helper lineage commitment of MHCII-specific Thpok -/- thymocytes. Importantly, augmenting TCR signaling significantly enhanced the ThPOK-mediated CD4 helper lineage choice of MHCI-specific thymocytes but was still substantially less efficient than that of MHCII-specific thymocytes expressing the same amount of ThPOK. Together, these data suggest that the ThPOK-induced CD4 helper lineage commitment is strongly influenced by TCR signal strength and MHC specificity of developing thymocytes.
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Affiliation(s)
- Nabil Zeidan
- Département d'Immunologie-Oncologie, Centre de Recherche Hôpital Maisonneuve-Rosemont, Montreal, Quebec H1T 2M4, Canada.,Département de Microbiologie, Immunologie et Infectiologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and
| | - Hassan Damen
- Département d'Immunologie-Oncologie, Centre de Recherche Hôpital Maisonneuve-Rosemont, Montreal, Quebec H1T 2M4, Canada
| | - Denis-Claude Roy
- Département d'Immunologie-Oncologie, Centre de Recherche Hôpital Maisonneuve-Rosemont, Montreal, Quebec H1T 2M4, Canada.,Department of Medicine, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - Vibhuti P Dave
- Département d'Immunologie-Oncologie, Centre de Recherche Hôpital Maisonneuve-Rosemont, Montreal, Quebec H1T 2M4, Canada; .,Département de Microbiologie, Immunologie et Infectiologie, Université de Montréal, Montreal, Quebec H3C 3J7, Canada; and
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12
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Srivastava A, Kumar AS, Mishra RK. Vertebrate GAF/ThPOK: emerging functions in chromatin architecture and transcriptional regulation. Cell Mol Life Sci 2018; 75:623-633. [PMID: 28856379 PMCID: PMC11105447 DOI: 10.1007/s00018-017-2633-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 08/09/2017] [Accepted: 08/25/2017] [Indexed: 12/31/2022]
Abstract
GAGA factor of Drosophila melanogaster (DmGAF) is a multifaceted transcription factor with diverse roles in chromatin regulation. Recently, ThPOK/c-Krox was identified as its vertebrate homologue (vGAF), which has a basic domain structure similar to DmGAF and is decorated with a number of post-translationally modified residues. In vertebrate genomes, vGAF associates with purine-rich GAGA sequences and performs diverse chromatin-mediated functions, viz., gene activation, repression and enhancer blocking. Expansion of regulatory chromatin proteins with the acquisition of PTMs appears to be the general trend that facilitated the evolution of complexity in vertebrates. Here, we compare the structural and functional features of vGAF with those of DmGAF and also assess the possible functional redundancy among paralogues of vGAF. We also discuss the underlying mechanisms which aid in the diverse and context-dependent functions of this protein.
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Affiliation(s)
- Avinash Srivastava
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad, 500007, India
| | - Amitha Sampath Kumar
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad, 500007, India
| | - Rakesh K Mishra
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad, 500007, India.
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13
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Matsumoto Y, Nagoshi H, Yoshida M, Kato S, Kuroda J, Shimura K, Kaneko H, Horiike S, Nakamura S, Taniwaki M. Expression of Master Regulators of T-cell, Helper T-cell and Follicular Helper T-cell Differentiation in Angioimmunoblastic T-cell Lymphoma. Intern Med 2017; 56:2851-2856. [PMID: 28943543 PMCID: PMC5709626 DOI: 10.2169/internalmedicine.8570-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Objective It has been postulated that the normal counterpart of angioimmunoblastic T-cell lymphoma (AITL) is the follicular helper T-cell (TFH). Recent immunological studies have identified several transcription factors responsible for T-cell differentiation. The master regulators associated with T-cell, helper T-cell (Th), and TFH differentiation are reportedly BCL11B, Th-POK, and BCL6, respectively. We explored the postulated normal counterpart of AITL with respect to the expression of the master regulators of T-cell differentiation. Methods We performed an immunohistochemical analysis in 15 AITL patients to determine the expression of the master regulators and several surface markers associated with T-cell differentiation. Results BCL11B was detected in 10 patients (67%), and the surface marker of T-cells (CD3) was detected in all patients. Only 2 patients (13%) expressed the marker of naïve T-cells (CD45RA), but all patients expressed the marker of effector T-cells (CD45RO). Nine patients expressed Th-POK (60%), and 7 (47%) expressed a set of surface antigens of Th (CD4-positive and CD8-negative). In addition, BCL6 and the surface markers of TFH (CXCL13, PD-1, and SAP) were detected in 11 (73%), 8 (53%), 14 (93%), and all patients, respectively. Th-POK-positive/BCL6-negative patients showed a significantly shorter overall survival (OS) than the other patients (median OS: 33.0 months vs. 74.0 months, p=0.020; log-rank test). Conclusion Many of the AITL patients analyzed in this study expressed the master regulators of T-cell differentiation. The clarification of the diagnostic significance and pathophysiology based on the expression of these master regulators in AITL is expected in the future.
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Affiliation(s)
- Yosuke Matsumoto
- Departments of Hematology and Laboratory Medicine, Aiseikai Yamashina Hospital, Japan
| | - Hisao Nagoshi
- Division of Hematology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Japan
| | - Mihoko Yoshida
- Departments of Hematology and Laboratory Medicine, Aiseikai Yamashina Hospital, Japan
| | - Seiichi Kato
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Japan
| | - Junya Kuroda
- Division of Hematology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Japan
| | - Kazuho Shimura
- Departments of Hematology and Laboratory Medicine, Aiseikai Yamashina Hospital, Japan
| | - Hiroto Kaneko
- Departments of Hematology and Laboratory Medicine, Aiseikai Yamashina Hospital, Japan
| | - Shigeo Horiike
- Division of Hematology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Japan
| | - Shigeo Nakamura
- Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Japan
| | - Masafumi Taniwaki
- Departments of Hematology and Laboratory Medicine, Aiseikai Yamashina Hospital, Japan
- Center for Molecular Diagnostics and Therapeutics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Japan
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14
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Kojo S, Tanaka H, Endo TA, Muroi S, Liu Y, Seo W, Tenno M, Kakugawa K, Naoe Y, Nair K, Moro K, Katsuragi Y, Kanai A, Inaba T, Egawa T, Venkatesh B, Minoda A, Kominami R, Taniuchi I. Priming of lineage-specifying genes by Bcl11b is required for lineage choice in post-selection thymocytes. Nat Commun 2017; 8:702. [PMID: 28951542 PMCID: PMC5615048 DOI: 10.1038/s41467-017-00768-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 07/27/2017] [Indexed: 12/05/2022] Open
Abstract
T-lineage committed precursor thymocytes are screened by a fate-determination process mediated via T cell receptor (TCR) signals for differentiation into distinct lineages. However, it remains unclear whether any antecedent event is required to couple TCR signals with the transcriptional program governing lineage decisions. Here we show that Bcl11b, known as a T-lineage commitment factor, is essential for proper expression of ThPOK and Runx3, central regulators for the CD4-helper/CD8-cytotoxic lineage choice. Loss of Bcl11b results in random expression of these factors and, thereby, lineage scrambling that is disconnected from TCR restriction by MHC. Initial Thpok repression by Bcl11b prior to the pre-selection stage is independent of a known silencer for Thpok, and requires the last zinc-finger motif in Bcl11b protein, which by contrast is dispensable for T-lineage commitment. Collectively, our findings shed new light on the function of Bcl11b in priming lineage-specifying genes to integrate TCR signals into subsequent transcriptional regulatory mechanisms. CD4 and CD8 T cells develop in the thymus with their transcription programs controlled by ThPOK and Runx3, respectively. Here the authors show that a pre-commitment event modulated by the transcription factor, Bcl11b, is required for the proper expression of ThPOK and Runx3 and correct CD4/CD8 lineage commitment.
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Affiliation(s)
- Satoshi Kojo
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Hirokazu Tanaka
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Takaho A Endo
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Sawako Muroi
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Ye Liu
- Division of Genomic Technologies, RIKEN Center for Life Science Technologies (CLST), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Wooseok Seo
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Mari Tenno
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Kiyokazu Kakugawa
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Yoshinori Naoe
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Krutula Nair
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Kazuyo Moro
- Laboratory for Innate Immune Systems, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Yoshinori Katsuragi
- Division of Molecular Biology, Department of Molecular Genetics, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Akinori Kanai
- Department of Molecular Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Toshiya Inaba
- Department of Molecular Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Takeshi Egawa
- Department of Pathology and Immunology, School of Medicine, Washington University School of Medicine, 660 S Euclid, Saint Louis, 63110, MO, USA
| | - Byrappa Venkatesh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Biopolis, 138673, Singapore
| | - Aki Minoda
- Division of Genomic Technologies, RIKEN Center for Life Science Technologies (CLST), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Ryo Kominami
- Division of Molecular Biology, Department of Molecular Genetics, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Ichiro Taniuchi
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan.
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15
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Blee AM, Liu S, Wang L, Huang H. BET bromodomain-mediated interaction between ERG and BRD4 promotes prostate cancer cell invasion. Oncotarget 2016; 7:38319-38332. [PMID: 27223260 PMCID: PMC5122392 DOI: 10.18632/oncotarget.9513] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 05/08/2016] [Indexed: 01/05/2023] Open
Abstract
Prostate cancer (PCa) that becomes resistant to hormone castration and next-generation androgen receptor (AR)-targeted therapies, called castration-resistant prostate cancer (CRPC), poses a significant clinical challenge. A better understanding of PCa progression and key molecular mechanisms could bring novel therapies to light. One potential therapeutic target is ERG, a transcription factor aberrantly up-regulated in PCa due to chromosomal rearrangements between androgen-regulated gene TMPRSS2 and ERG. Here we show that the most common PCa-associated truncated ERG T1-E4 (ERGΔ39), encoded by fusion between TMPRSS2 exon 1 and ERG exon 4, binds to bromodomain-1 (BD1) of bromodomain containing protein 4 (BRD4), a member of the bromodomain and extraterminal domain (BET) family. This interaction is partially abrogated by BET inhibitors JQ1 and iBET762. Meta-analysis of published ERG (T1-E4) and BRD4 chromatin immunoprecipitation-sequencing (ChIP-seq) data demonstrates overlap in a substantial portion of their binding sites. Gene expression profile analysis shows some ERG-BRD4 co-target genes are upregulated in CRPC compared to hormone-naïve counterparts. We provide further evidence that ERG-mediated invasion of PCa cells was significantly enhanced by an acetylation-mimicking mutation in ERG that augments the ERG-BRD4 interaction. Our findings reveal that PCa-associated ERG can interact and co-occupy with BRD4 in the genome, and suggest this druggable interaction is critical for ERG-mediated cell invasion and PCa progression.
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Affiliation(s)
- Alexandra M. Blee
- Mayo Graduate School, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, 55905, USA
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
| | - Shujun Liu
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Liguo Wang
- Division of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
| | - Haojie Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
- Department of Urology, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
- Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
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16
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Carofino BL, Ayanga B, Tracey LJ, Brooke-Bisschop T, Justice MJ. PRDM14 promotes RAG-dependent Notch1 driver mutations in mouse T-ALL. Biol Open 2016; 5:645-53. [PMID: 27106930 PMCID: PMC4874358 DOI: 10.1242/bio.017699] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
PRDM14 is an epigenetic regulator known for maintaining embryonic stem cell identity and resetting potency in primordial germ cells. However, hematopoietic expression of Prdm14 at supraphysiological levels results in fully penetrant and rapid-onset T-cell acute lymphoblastic leukemia (T-ALL) in the mouse. Here, we show that PRDM14-induced T-ALLs are driven by NOTCH1, a frequently mutated driver of human T-ALL. Notch1 is activated in this murine model via RAG-dependent promoter deletions and subsequent production of truncated, ligand-independent protein from downstream regions of the Notch1 locus. These T-ALLs also have focal changes in H3K4me3 deposition at the Notch1 locus and global increases in both H3K4me1 and H3K4me3. Using a PRDM14-FLAG mouse model, we show that PRDM14 binds within an intron of Notch1 prior to leukemia development. Our data support the idea that PRDM14 binding promotes a chromatin state that allows access of the RAG recombinase complex to cryptic RAG signal sequences embedded at the Notch1 locus. Indeed, breeding into a RAG recombination-deficient background abrogates T-ALL development and prevents Notch1 deletions, while allowing for transient hematopoietic stem cell (HSC)-like pre-leukemia cell expansion. Together, our data suggest that PRDM14 expands a progenitor cell population while promoting a permissive epigenetic state for the creation of driver mutations (here, in Notch1), enabling cancer development through the misappropriation of endogenous cellular DNA recombination machinery. Summary: PRDM14 promotes an epigenetic state that facilitates RAG-dependent Notch1 driver mutations, coupling progenitor cell expansion with genomic instability to produce T-ALL with shorter latency than other NOTCH1-driven mouse models.
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Affiliation(s)
- Brandi L Carofino
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, 77030 USA Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030 USA
| | - Bernard Ayanga
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030 USA
| | - Lauren J Tracey
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5S 1A8 Canada Genetics and Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, M5G 0A4 Canada
| | - Travis Brooke-Bisschop
- Genetics and Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, M5G 0A4 Canada
| | - Monica J Justice
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, 77030 USA Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030 USA Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5S 1A8 Canada Genetics and Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, M5G 0A4 Canada
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17
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DNMT3A(R882H) mutant and Tet2 inactivation cooperate in the deregulation of DNA methylation control to induce lymphoid malignancies in mice. Leukemia 2016; 30:1388-98. [PMID: 26876596 PMCID: PMC4869893 DOI: 10.1038/leu.2016.29] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 01/07/2016] [Accepted: 01/18/2016] [Indexed: 12/21/2022]
Abstract
TEN-ELEVEN-TRANSLOCATION-2 (TET2) and DNA-METHYLTRANSFERASE-3A (DNMT3A), both encoding proteins involved in regulating DNA methylation, are mutated in hematological malignancies affecting both myeloid and lymphoid lineages. We previously reported an association of TET2 and DNMT3A mutations in progenitors of patients with angioimmunoblastic T-cell lymphomas (AITL). Here, we report on the cooperative effect of Tet2-inactivation and DNMT3A mutation affecting arginine 882 (DNMT3AR882H) using a murine bone marrow transplantation assay. Five out of 18 primary recipients developed hematological malignancies with one mouse developing an AITL-like disease, 2 mice presenting acute myeloid leukemia (AML)-like and 2 others T cell acute lymphoblastic leukemia (T-ALL)-like diseases within 6 months following transplantation. Serial transplantations of DNMT3AR882H Tet2−/− progenitors led to a differentiation bias toward the T-cell compartment, eventually leading to AITL-like disease in 9/12 serially transplanted recipients. Expression profiling suggested that DNMT3AR882H Tet2−/− T-ALLs resemble those of NOTCH1 mutant. Methylation analysis of DNMT3AR882H Tet2−/− T-ALLs showed a global increase in DNA methylation affecting tumor suppressor genes and local hypomethylation affecting genes involved in the Notch pathway. Our data confirm the transformation potential of DNMT3AR882H Tet2−/− progenitors and represent the first cooperative model in mice involving Tet2-inactivation driving lymphoid malignancies.
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