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Yu X, Li Y, Yang P, Wang Y, Liu X, Cai L, Lai J, Zhang Y, Zha X, Przybylski GK, Xu L, Li Y. BCL11B promotes T-cell acute lymphoblastic leukaemia cell survival via the XRCC5/C11ORF21 axis. Clin Transl Med 2024; 14:e1580. [PMID: 38317587 PMCID: PMC10844840 DOI: 10.1002/ctm2.1580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/07/2024] Open
Affiliation(s)
- Xibao Yu
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
- Guangzhou Municipality Tianhe Nuoya Bio‐Engineering Co. Ltd., Guangzhou 510663GuangdongChina
| | - Yuchen Li
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Pengyue Yang
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Yan Wang
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Xuan Liu
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Letong Cai
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Jing Lai
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
| | - Yue Zhang
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
| | - Xianfeng Zha
- Department of Clinical Laboratory, First Affiliated HospitalJinan UniversityGuangzhouGuangdongChina
| | | | - Ling Xu
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
| | - Yangqiu Li
- The First Affiliated Hospital and Institute of Hematology, School of MedicineJinan UniversityGuangzhouGuangdongChina
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan UniversityGuangzhouGuangdongChina
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Vickridge E, Faraco CCF, Lo F, Rahimian H, Liu Z, Tehrani P, Djerir B, Ramdzan ZM, Leduy L, Maréchal A, Gingras AC, Nepveu A. The function of BCL11B in base excision repair contributes to its dual role as an oncogene and a haplo-insufficient tumor suppressor gene. Nucleic Acids Res 2024; 52:223-242. [PMID: 37956270 PMCID: PMC10783527 DOI: 10.1093/nar/gkad1037] [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: 06/14/2023] [Revised: 10/13/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Genetic studies in mice and human cancers established BCL11B as a haploinsufficient tumor suppressor gene. Paradoxically, BCL11B is overexpressed in some human cancers where its knockdown is synthetic lethal. We identified the BCL11B protein in a proximity-dependent biotinylation screen performed with the DNA glycosylase NTHL1. In vitro DNA repair assays demonstrated that both BCL11B and a small recombinant BCL11B213-560 protein lacking transcription regulation potential can stimulate the enzymatic activities of two base excision repair (BER) enzymes: NTHL1 and Pol β. In cells, BCL11B is rapidly recruited to sites of DNA damage caused by laser microirradiation. BCL11B knockdown delays, whereas ectopic expression of BCL11B213-560 accelerates, the repair of oxidative DNA damage. Inactivation of one BCL11B allele in TK6 lymphoblastoid cells causes an increase in spontaneous and radiation-induced mutation rates. In turn, ectopic expression of BCL11B213-560 cooperates with the RAS oncogene in cell transformation by reducing DNA damage and cellular senescence. These findings indicate that BCL11B functions as a BER accessory factor, safeguarding normal cells from acquiring mutations. Paradoxically, it also enables the survival of cancer cells that would otherwise undergo senescence or apoptosis due to oxidative DNA damage resulting from the elevated production of reactive oxygen species.
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Affiliation(s)
- Elise Vickridge
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Camila C F Faraco
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Fanny Lo
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Hedyeh Rahimian
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Zi Yang Liu
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Payman S Tehrani
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario Canada
| | - Billel Djerir
- Department of Biology and Cancer Research Institute, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Zubaidah M Ramdzan
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Lam Leduy
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
| | - Alexandre Maréchal
- Department of Biology and Cancer Research Institute, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Anne-Claude Gingras
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Alain Nepveu
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Biochemistry, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Medicine, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
- Department of Oncology, McGill University, 1160 Pine Avenue West, Montreal, Quebec H3A 1A3, Canada
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Liu Z, Wang Z, Wei Y, Shi J, Shi T, Chen X, Li L. Transcriptomic Profiling of Tetrodotoxin-Induced Neurotoxicity in Human Cerebral Organoids. Mar Drugs 2023; 21:588. [PMID: 37999412 PMCID: PMC10672545 DOI: 10.3390/md21110588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/30/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023] Open
Abstract
Tetrodotoxin (TTX) is an exceedingly toxic non-protein biotoxin that demonstrates remarkable selectivity and affinity for sodium channels on the excitation membrane of nerves. This property allows TTX to effectively obstruct nerve conduction, resulting in nerve paralysis and fatality. Although the mechanistic aspects of its toxicity are well understood, there is a dearth of literature addressing alterations in the neural microenvironment subsequent to TTX poisoning. In this research endeavor, we harnessed human pluripotent induced stem cells to generate cerebral organoids-an innovative model closely mirroring the structural and functional intricacies of the human brain. This model was employed to scrutinize the comprehensive transcriptomic shifts induced by TTX exposure, thereby delving into the neurotoxic properties of TTX and its potential underlying mechanisms. Our findings revealed 455 differentially expressed mRNAs (DEmRNAs), 212 differentially expressed lncRNAs (DElncRNAs), and 18 differentially expressed miRNAs (DEmiRNAs) in the TTX-exposed group when juxtaposed with the control cohort. Through meticulous Gene Ontology (GO) annotation, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis, and protein-protein interaction (PPI) analysis, we ascertained that these differential genes predominantly participate in the regulation of voltage-gated channels and synaptic homeostasis. A comprehensive ceRNA network analysis unveiled that DEmRNAs exert control over the expression of ion channels and neurocytokines, suggesting their potential role in mediating apoptosis.
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Affiliation(s)
- Zhanbiao Liu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Zhe Wang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Yue Wei
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
| | - Jingjing Shi
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
| | - Tong Shi
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
| | - Xuejun Chen
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
| | - Liqin Li
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China (J.S.)
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Chen C, Huang L, Liu S, Jiang X, Chen F, Wei X, Guo H, Zeng X, Zeng C, Przybylski GK, Li W, Li Y. T-cell lymphoma patient harboring BCL11B mutations had favorable overall survival. Asia Pac J Clin Oncol 2023. [PMID: 37635422 DOI: 10.1111/ajco.14000] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/07/2023] [Accepted: 08/17/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND Molecular genetics serve a critical role in constructing risk stratification for hematological malignancies, but T-cell lymphoma (TCL) still lacks molecular genetic information for supplement risk stratification in predicting the prognosis of TCL patients. In the present study, we characterized the mutation patterns of B-cell leukemia/lymphoma 11B gene (BCL11B) and its prognostic importance in TCL patients. METHODS BCL11B mutations were characterized based on the data from two datasets, one is from our clinical center (GDPH dataset, n = 79) and the other is from COSMIC dataset (n = 154). RESULTS The overall mutation rate of BCL11B was 6.4% (15/233) in TCL, and there were no hotspot mutation sites in TCL. Among these mutations, the missense and splice site mutation were significantly prominent. Moreover, TCL patients harboring BCL11B mutations had a favorable overall survival (OS) in our center (GDPH dataset) (adjusted hazard ratio [HR] = .001, p = 0.109), although there were not yet significantly statistical at this point. In addition, TCL patients harboring BCL11B mutation had a longer 5-year restricted mean survival time (RMST) than those without a BCL11B mutation (60 vs. 32 months). Notably, BCL11B mutations were not associated with TCL entities having better prognosis. CONCLUSIONS BCL11B mutations were associated with favorable clinical outcome for TCL patients; it might be considered as a novel biomarker for TCL prognostic stratification.
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Affiliation(s)
- Cunte Chen
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
- Department of Hematology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, China
| | - Ling Huang
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Sichu Liu
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Xinmiao Jiang
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Feili Chen
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Xiaojuan Wei
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Hanguo Guo
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Xiangbo Zeng
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Chengwu Zeng
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | | | - Wenyu Li
- Department of Lymphoma, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, China
| | - Yangqiu Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
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Abe H, Kamimura K, Okuda S, Watanabe Y, Inoue J, Aoyagi Y, Wakai T, Kominami R, Terai S. BCL11B expression in hepatocellular carcinoma relates to chemosensitivity and clinical prognosis. Cancer Med 2023; 12:15650-15663. [PMID: 37293953 PMCID: PMC10417273 DOI: 10.1002/cam4.6167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 06/10/2023] Open
Abstract
INTRODUCTION B-cell lymphoma/leukemia 11B (BCL11B) is a subunit of SWI/SNF chromatin remodeling complexes and functions in cell cycle regulation and apoptosis upon DNA replication stress and damages via transcription. Many malignancies were reported to exhibit changes in BCL11B gene expression; however, no study has focused on the relationship between BCL11B and hepatocellular carcinoma, which potentially exhibits DNA replication stress and damages upon its oncogenesis. Thus, in this study, we examined the molecular characterization of BCL11B expression in hepatocellular carcinoma. METHODS AND RESULTS The cumulative progression-free survival and overall survival were significantly longer in the clinical cases of BCL11B-negative hepatocellular carcinoma than BCL11B-positve cases. Microarray and real-time PCR analyses in hepatocellular carcinoma cell lines indicated a correlation between BCL11B and GATA6, a gene reported to be correlated with oncogenic activities and resistance to anthracycline, which is often used for hepatocellular carcinoma chemotherapy. Consequently, BCL11B-overexpressing cell lines exhibited resistance to anthracycline in cell growth assays and the resistance has been evidenced by the increased expression of BCL-xL in cell lines. The results were supported by the analyses of human HCC samples showing the correlation between BCL11B and GATA6 expressions. DISCUSSIONS AND CONCLUSION Our results indicated that overexpression of BCL11B amplifies GATA6 expression in hepatocellular carcinoma in vitro and in vivo that leads to anti-apoptotic signal activation, and induces resistance to chemotherapy, which influenced the postoperative prognosis.
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Affiliation(s)
- Hiroyuki Abe
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
| | - Kenya Kamimura
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
- Department of General MedicineNiigata University School of MedicineNiigataNiigataJapan
| | - Shujiro Okuda
- Division of Bioinformatics, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
| | - Yu Watanabe
- Division of Bioinformatics, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
| | - Jun Inoue
- Department of Agricultural Chemistry, Faculty of Applied BiosciencesTokyo University of AgricultureTokyoJapan
| | - Yutaka Aoyagi
- Department of Gastroenterology and HepatologyNiigata Medical CenterNiigataNiigataJapan
| | - Toshifumi Wakai
- Division of Digestive and General Surgery, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
| | - Ryo Kominami
- Department of Molecular Genetics, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
| | - Shuji Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental SciencesNiigata UniversityNiigataNiigataJapan
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Huang HY, Wang Y, Herold T, Gale RP, Wang JZ, Li L, Lin HX, Liang Y. A survival prediction model and nomogram based on immune-related gene expression in chronic lymphocytic leukemia cells. Front Med (Lausanne) 2022; 9:1026812. [PMID: 36600891 PMCID: PMC9806429 DOI: 10.3389/fmed.2022.1026812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
Introduction There are many different chronic lymphoblastic leukemia (CLL) survival prediction models and scores. But none provide information on expression of immune-related genes in the CLL cells. Methods We interrogated data from the Gene Expression Omnibus database (GEO, GSE22762; Number = 151; training) and International Cancer Genome Consortium database (ICGC, CLLE-ES; Number = 491; validation) to develop an immune risk score (IRS) using Least absolute shrinkage and selection operator (LASSO) Cox regression analyses based on expression of immune-related genes in CLL cells. The accuracy of the predicted nomogram we developed using the IRS, Binet stage, and del(17p) cytogenetic data was subsequently assessed using calibration curves. Results A survival model based on expression of 5 immune-related genes was constructed. Areas under the curve (AUC) for 1-year survivals were 0.90 (95% confidence interval, 0.78, 0.99) and 0.75 (0.54, 0.87) in the training and validation datasets, respectively. 5-year survivals of low- and high-risk subjects were 89% (83, 95%) vs. 6% (0, 17%; p < 0.001) and 98% (95, 100%) vs. 92% (88, 96%; p < 0.001) in two datasets. The IRS was an independent survival predictor of both datasets. A calibration curve showed good performance of the nomogram. In vitro, the high expression of CDKN2A and SREBF2 in the bone marrow of patients with CLL was verified by immunohistochemistry analysis (IHC), which were associated with poor prognosis and may play an important role in the complex bone marrow immune environment. Conclusion The IRS is an accurate independent survival predictor with a high C-statistic. A combined nomogram had good survival prediction accuracy in calibration curves. These data demonstrate the potential impact of immune related genes on survival in CLL.
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Affiliation(s)
- Han-ying Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yun Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Tobias Herold
- Laboratory for Leukemia Diagnostics, Department of Medicine III, University Hospital, LMU Munich, Munich, Germany
| | - Robert Peter Gale
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China,Haematology Research Centre, Department of Immunology and Inflammation, Imperial College London, London, United Kingdom
| | - Jing-zi Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Liang Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Huan-xin Lin
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China,Huan-xin Lin,
| | - Yang Liang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China,Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China,*Correspondence: Yang Liang,
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Generation of Inducible BCL11B Knockout in TAL1/LMO1 Transgenic Mouse T Cell Leukemia/Lymphoma Model. Int J Mol Sci 2022; 23:ijms23094932. [PMID: 35563322 PMCID: PMC9101037 DOI: 10.3390/ijms23094932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/26/2022] [Accepted: 04/26/2022] [Indexed: 11/16/2022] Open
Abstract
The B-cell CLL/lymphoma 11B gene (BCL11B) plays a crucial role in T-cell development, but its role in T-cell malignancies is still unclear. To study its role in the development of T-cell neoplasms, we generated an inducible BCL11B knockout in a murine T cell leukemia/lymphoma model. Mice, bearing human oncogenes TAL BHLH Transcription Factor 1 (TAL1; SCL) or LIM Domain Only 1 (LMO1), responsible for T-cell acute lymphoblastic leukemia (T-ALL) development, were crossed with BCL11B floxed and with CRE-ER/lox mice. The mice with a single oncogene BCL11Bflox/floxCREtg/tgTAL1tg or BCL11Bflox/floxCREtg/tgLMO1tg were healthy, bred normally, and were used to maintain the mice in culture. When crossed with each other, >90% of the double transgenic mice BCL11Bflox/floxCREtg/tgTAL1tgLMO1tg, within 3 to 6 months after birth, spontaneously developed T-cell leukemia/lymphoma. Upon administration of synthetic estrogen (tamoxifen), which binds to the estrogen receptor and activates the Cre recombinase, the BCL11B gene was knocked out by excision of its fourth exon from the genome. The mouse model of inducible BCL11B knockout we generated can be used to study the role of this gene in cancer development and the potential therapeutic effect of BCL11B inhibition in T-cell leukemia and lymphoma.
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Fang H, Wang W, El Hussein S, Morita K, Beird HC, Mitra A, Loghavi S, Lin P, Jabbour EJ, Khoury JD. B-cell lymphoma/leukaemia 11B (BCL11B) expression status helps distinguish early T-cell precursor acute lymphoblastic leukaemia/lymphoma (ETP-ALL/LBL) from other subtypes of T-cell ALL/LBL. Br J Haematol 2021; 194:1034-1038. [PMID: 34402058 DOI: 10.1111/bjh.17681] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 06/07/2021] [Indexed: 12/21/2022]
Abstract
B-cell lymphoma/leukaemia 11B (BCL11B) is an essential transcription factor for T-cell lineage commitment and maturation. We investigated BCL11B expression by immunohistochemistry in T-lymphoblastic leukaemia/lymphoma (T-ALL/LBL) (n = 115). The majority (83%) of early T-cell precursor T-ALL/LBL (ETP-ALL) cases showed negative BCL11B expression, while most (84%) of non-ETP-ALL/LBL were positive for BCL11B. A simplified three-marker [BCL11B, cluster of differentiation 5 (CD5), CD13] immunophenotypic score discriminated reliably between ETP-ALL and non-ETP-ALL/LBL. In ETP-ALL, patients with positive BCL11B expression had a better overall survival than those with negative BCL11B (P = 0·009). In summary, BCL11B is a valuable marker for T-ALL/LBL subtyping and serves as a potential prognostic marker in patients with ETP-ALL.
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Affiliation(s)
- Hong Fang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Wei Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Siba El Hussein
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kiyomi Morita
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hannah C Beird
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Akash Mitra
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Quantitative Sciences Graduate Training Program, Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Sanam Loghavi
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Pei Lin
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Elias J Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Joseph D Khoury
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Li K, Chen C, Gao R, Yu X, Huang Y, Chen Z, Liu Z, Chen S, Luo G, Huang X, Przybylski GK, Li Y, Zeng C. Inhibition of BCL11B induces downregulation of PTK7 and results in growth retardation and apoptosis in T-cell acute lymphoblastic leukemia. Biomark Res 2021; 9:17. [PMID: 33663588 DOI: 10.1186/s40364-021-00270-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 02/19/2021] [Indexed: 12/13/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive subtype of leukemia with poor prognosis, and biomarkers and novel therapeutic targets are urgently needed for this disease. Our previous studies have found that inhibition of the B-cell leukemia/lymphoma 11B (BCL11B) gene could significantly promote the apoptosis and growth retardation of T-ALL cells, but the molecular mechanism underlying this effect remains unclear. This study intends to investigate genes downstream of BCL11B and further explore its function in T-ALL cells. We found that PTK7 was a potential downstream target of BCL11B in T-ALL. Compared with the healthy individuals (HIs), PTK7 was overexpressed in T-ALL cells, and BCL11B expression was positively correlated with PTK7 expression. Importantly, BCL11B knockdown reduced PTK7 expression in T-ALL cells. Similar to the effects of BCL11B silencing, downregulation of PTK7 inhibited cell proliferation and induced apoptosis in Molt-4 cells via up-regulating the expression of tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) and p27. Altogether, our studies suggest that PTK7 is a potential downstream target of BCL11B, and downregulation of PTK7 expression via inhibition of the BCL11B pathway induces growth retardation and apoptosis in T-ALL cells.
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Affiliation(s)
- Kehan Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Cunte Chen
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Rili Gao
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Xibao Yu
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Youxue Huang
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Zheng Chen
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Zhuandi Liu
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Shaohua Chen
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China
| | - Gengxin Luo
- Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, 510632, P.R. China
| | - Xin Huang
- Department of Hematology, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou, 510080, P.R. China
| | - Grzegorz K Przybylski
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszyńska 32, 60-479, Poznań, Poland.
| | - Yangqiu Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China.
| | - Chengwu Zeng
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, Jinan University, Guangzhou, 510632, P.R. China.
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10
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Wang X, Lu S, Xiao Y, Xu L, Zhou L, Hu J, Li B, Zeng C, Li Y. Alteration of gene expression profile in CD3 + T-cells after downregulating MALT1. Immunotargets Ther 2018; 7:77-81. [PMID: 30538965 PMCID: PMC6251356 DOI: 10.2147/itt.s179656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background T cell immunodeficiency is a common feature in patients with different kinds of hematological disease such as T cell non-Hodgkin lymphoma (T-NHL), B cells NHL (B-NHL), NK/T cell NHL (NK/T-CL) and acute myeloid leukemia (AML). In our recent research, we found that significantly lower expression levels in MALT1 and NF-κB were related to suppression of T cell activation. Therefore, this study was conducted to further investigate the role of downregulating MALT1 in the development of immunodeficiency in T cells. Methods We induced activation inhibition in CD3+ T cells by MALT1 knockdown. Then we characterized the gene expression profile after MALT1 suppression by microarray analysis. Result The differentially expressed genes were ZAP-70, p65, MDM2, ATM, NFATC2 which participate in the NF-κB, p53, and NFAT pathways in CD3+ T cells after MALT1 downregulation. Conclusion MALT1 suppression may contribute to immunodeficiency in T cells via suppression of T cell activation and proliferation pathways. These data may help to explain some of the characteristics of immunodeficiency of T cells.
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Affiliation(s)
- Xu Wang
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Shuai Lu
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Yankai Xiao
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Ling Xu
- Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China,
| | - Lingling Zhou
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Junyan Hu
- Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Bo Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Chengwu Zeng
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, ,
| | - Yangqiu Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Institute of Hematology, Jinan University, Guangzhou, 510632, People's Republic of China, , .,Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China,
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11
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He Z, Liao Z, Chen S, Li B, Yu Z, Luo G, Yang L, Zeng C, Li Y. Downregulated miR-17, miR-29c, miR-92a and miR-214 may be related to BCL11B overexpression in T cell acute lymphoblastic leukemia. Asia Pac J Clin Oncol 2018; 14:e259-e265. [PMID: 29749698 DOI: 10.1111/ajco.12979] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 03/23/2018] [Indexed: 12/31/2022]
Abstract
AIM BCL11B overexpression is a characteristic of most T cell acute lymphoblastic leukemia (T-ALL) cases, and downregulated BCL11B in leukemic T cells inhibits cell proliferation and induces apoptosis. The purpose of this study was to analyze the miRNA expression pattern that may be related to BCL11B regulation in T-ALL. METHODS Quantitative real-time PCR was used to detect the miRNAs miR-17-3p, miR-17-5p, miR-29c-3p, miR-92a-3p, miR-214-3p and miR-214-5p, the BCL11B expression level in peripheral blood mononuclear cells which was obtained from 17 de novo and untreated T-ALL patients, and 15 healthy individuals (HIs) served as control. Correlations between the relative miRNA expression levels and BCL11B were analyzed. RESULTS Based on the computational prediction that certain miRNAs bind the BCL11B 3'-UTR, miR-17-3p, miR-17-5p, miR-29c-3p, miR-92a-3p, miR-214-3p and miR-214-5p were found to be candidates for regulating BCL11B. The expression levels of the six miRNAs were decreased compared with HIs, and with the exception of miR-17-5p, statistically significant differences in expression levels were found in the T-ALL group. Moreover, while significantly higher BCL11B expression was found in the T-ALL group, a negative trend in the correlation level for all six miRNAs could be found in all groups; however, statistical significance was only found for miR-214-3p in the T-ALL group. CONCLUSION miRNA downregulation together with BCL11B upregulation suggests that miR-17, miR-29c, miR-92a and miR-214 might be involved in BCL11B regulation. The therapeutic promise of regulating the expression of these miRNAs for T-ALL therapy may be considered in the future.
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Affiliation(s)
- Zifan He
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Ziwei Liao
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Shaohua Chen
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Bo Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Zhi Yu
- Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Gengxin Luo
- Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Lijian Yang
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Chengwu Zeng
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China
| | - Yangqiu Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, China.,Department of Hematology, First Affiliated Hospital, Jinan University, Guangzhou, China
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12
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Jin P, Chen H, Xie J, Zhou C, Zhu X. Essential role of microRNA-650 in the regulation of B-cell CLL/lymphoma 11B gene expression following transplantation: A novel mechanism behind the acute rejection of renal allografts. Int J Mol Med 2017; 40:1840-1850. [PMID: 29039465 PMCID: PMC5716404 DOI: 10.3892/ijmm.2017.3194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Accepted: 10/06/2017] [Indexed: 12/14/2022] Open
Abstract
Kidney transplantation is an effective final therapeutic procedure for patients with end-stage kidney failure. Although advanced immunosuppressive therapy is administered following transplantation, certain patients still suffer from acute allograft rejection. MicroRNAs (miRs) have a potential diagnostic and therapeutic value for acute renal allograft rejection; however, their underlying mechanism of action is largely unknown. In the present study, an increased level of miR-650 was identified to be associated with the downregulation of B-cell CLL/lymphoma 11B (BCL11B) expression in acute renal allograft rejection. Furthermore, in vitro study using human renal glomerular endothelial cells (HRGECs) transfected with a miR-650 mimic revealed that key characteristics of acute renal allograft rejection were observed, including apoptosis, the release of cytokines and the chemotaxis of macrophages, while the effects were reduced in HRGECs transfected with a miR-650 inhibitor. The existence of a conserved miR-650 binding site on the 3'-untranslated region of BCL11B mRNA was predicted by computational algorithms and confirmed by a luciferase reporter assay. Knockdown of BCL11B with small interfering RNA (siRNA) significantly increased the apoptotic rate and significantly decreased the proliferation ability of HRGECs compared with the negative control group. HRGECs transfected with a combination of BCL11B siRNA and the miR-650 mimic demonstrated a significant increase in the rate of apoptosis compared with the control. These results suggest that the upregulation of miR-650 contributes to the development of acute renal allograft rejection by suppression of BCL11B, which leads to apoptosis and inflammatory responses. Thus, miR-650 and BCL11B may represent potential therapeutic targets for the prevention of acute renal allograft rejection.
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Affiliation(s)
- Peng Jin
- Centre of Organ Transplantation, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Hongxi Chen
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Jinliang Xie
- Centre of Organ Transplantation, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Cheng Zhou
- Centre of Organ Transplantation, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Xiangrong Zhu
- Centre of Organ Transplantation, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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13
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Dubuissez M, Loison I, Paget S, Vorng H, Ait-Yahia S, Rohr O, Tsicopoulos A, Leprince D. Protein Kinase C-Mediated Phosphorylation of BCL11B at Serine 2 Negatively Regulates Its Interaction with NuRD Complexes during CD4+ T-Cell Activation. Mol Cell Biol 2016; 36:1881-98. [PMID: 27161321 PMCID: PMC4911745 DOI: 10.1128/mcb.00062-16] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 02/16/2016] [Accepted: 05/03/2016] [Indexed: 12/17/2022] Open
Abstract
The transcription factor BCL11B/CTIP2 is a major regulatory protein implicated in various aspects of development, function and survival of T cells. Mitogen-activated protein kinase (MAPK)-mediated phosphorylation and SUMOylation modulate BCL11B transcriptional activity, switching it from a repressor in naive murine thymocytes to a transcriptional activator in activated thymocytes. Here, we show that BCL11B interacts via its conserved N-terminal MSRRKQ motif with endogenous MTA1 and MTA3 proteins to recruit various NuRD complexes. Furthermore, we demonstrate that protein kinase C (PKC)-mediated phosphorylation of BCL11B Ser2 does not significantly impact BCL11B SUMOylation but negatively regulates NuRD recruitment by dampening the interaction with MTA1 or MTA3 (MTA1/3) and RbAp46 proteins. We detected increased phosphorylation of BCL11B Ser2 upon in vivo activation of transformed and primary human CD4(+) T cells. We show that following activation of CD4(+) T cells, BCL11B still binds to IL-2 and Id2 promoters but activates their transcription by recruiting P300 instead of MTA1. Prolonged stimulation results in the direct transcriptional repression of BCL11B by KLF4. Our results unveil Ser2 phosphorylation as a new BCL11B posttranslational modification linking PKC signaling pathway to T-cell receptor (TCR) activation and define a simple model for the functional switch of BCL11B from a transcriptional repressor to an activator during TCR activation of human CD4(+) T cells.
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Affiliation(s)
- Marion Dubuissez
- Université Lille, CNRS, Institut Pasteur de Lille, UMR 8161, Mechanisms of Tumorigenesis and Targeted Therapies (M3T), Lille, France
| | - Ingrid Loison
- Université Lille, CNRS, Institut Pasteur de Lille, UMR 8161, Mechanisms of Tumorigenesis and Targeted Therapies (M3T), Lille, France
| | - Sonia Paget
- Université Lille, CNRS, Institut Pasteur de Lille, UMR 8161, Mechanisms of Tumorigenesis and Targeted Therapies (M3T), Lille, France
| | - Han Vorng
- Université Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019, UMR8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
| | - Saliha Ait-Yahia
- Université Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019, UMR8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
| | - Olivier Rohr
- University of Strasbourg, IUT Louis Pasteur, EA7292, Dynamic of Host Pathogen Interactions, Institute of Parasitology and Tropical Pathology, Strasbourg, France Institut Universitaire de France, Paris, France
| | - Anne Tsicopoulos
- Université Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019, UMR8204, Center for Infection and Immunity of Lille (CIIL), Lille, France
| | - Dominique Leprince
- Université Lille, CNRS, Institut Pasteur de Lille, UMR 8161, Mechanisms of Tumorigenesis and Targeted Therapies (M3T), Lille, France
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14
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Huang X, Geng S, Weng J, Lu Z, Zeng L, Li M, Deng C, Wu X, Li Y, Du X. Analysis of the expression of PHTF1 and related genes in acute lymphoblastic leukemia. Cancer Cell Int 2015; 15:93. [PMID: 26448723 PMCID: PMC4595316 DOI: 10.1186/s12935-015-0242-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 09/08/2015] [Indexed: 11/18/2022] Open
Abstract
Background Previous study showed that downregulated BCL11B expression in T cell acute lymphoblastic leukemia (T-ALL) cell line Molt-4 inhibited cell proliferation and induce apoptosis, which may be related to PHTF1 gene overexpression. The objective of this study was to investigate the expression of PHTF1 and related genes in ALL and further explore its function in T-ALL cell lines. Methods Real-time PCR was used to determine the gene expression level of PHTF1 in hematologic malignancies. The PHTF1, BCL11B, FEM1B and Apaf-1 gene expression levels and correlations were analyzed in patients with primary ALL (including T-ALL and B-ALL) and healthy individuals (HIs). Inhibition and overexpression of PHTF1 by lentiviral transduction were performed using the Molt-4 and Jurkat cell lines. Cell growth and apoptosis were measured by the Cell Counting Kit-8 assay and flow cytometry, respectively. Upon PHTF1 overexpression, the BCL11B, FEM1B and Apaf-1 gene expression levels were determined by real-time PCR. Results PHTF1 overexpression was found in both T-ALL (p = 0.004) and B-ALL (p < 0.001) groups compared with HIs group. A trend toward a negative correlation between the PHTF1 and BCL11B genes was detected for the T-ALL group, while positively correlated expression was found for the PHTF1 and BCL11B genes in HIs (P = 0.001). FEM1b and Apaf-1 overexpression was found in recently diagnosed ALL patients compared with HIs (p < 0.05). Positively correlated expression was found for the PHTF1, FEM1b and Apaf-1 genes in patients with ALL (p < 0.05) and HIs (p < 0.05). Direct up-regulation of PHTF1 expression inhibited the proliferation of Jurkat and Molt-4 cells and effectively induced apoptosis in Molt-4 cells. Direct inhibition of PHTF1 expression had no significant effect on the proliferation or apoptosis of Jurkat and Molt-4 cells. FEM1b and Apaf-1 overexpression, which did not obviously alter the BCL11B expression level, was detected in PHTF1-transduced T-ALL cell lines. Conclusions PHTF1 overexpression is responsible for regulating cell proliferation and apoptosis in T-ALL cell lines. PHTF1 may be a tumor-suppressor like gene and a therapeutic target for triggering the PHTF1-FEM1b-Apaf-1 apoptosis pathway.
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Affiliation(s)
- Xin Huang
- Southern Medical University, 510515 Guangzhou, People's Republic of China ; Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Suxia Geng
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Jianyu Weng
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Zesheng Lu
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Lingji Zeng
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Minming Li
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Chengxin Deng
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
| | - Xiuli Wu
- Institute of Hematology, Medical College, Jinan University, 510632 Guangzhou, People's Republic of China
| | - Yangqiu Li
- Institute of Hematology, Medical College, Jinan University, 510632 Guangzhou, People's Republic of China ; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, 510632 Guangzhou, People's Republic of China
| | - Xin Du
- Department of Haematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 510080 Guangzhou, People's Republic of China
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15
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Liao CK, Fang KM, Chai K, Wu CH, Ho CH, Yang CS, Tzeng SF. Depletion of B cell CLL/Lymphoma 11B Gene Expression Represses Glioma Cell Growth. Mol Neurobiol 2015; 53:3528-3539. [PMID: 26096706 DOI: 10.1007/s12035-015-9231-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/22/2015] [Indexed: 11/29/2022]
Abstract
B cell CLL/lymphoma 11B (Bcl11b), a C2H2 zinc finger transcription factor, not only serves as a critical regulator in development but also plays the controversial role in T cell acute lymphoblastic leukemia (T-ALL). We previously found that the enriched expression of Bcl11b was detected in high tumorigenic C6 glioma cells. However, the role of Bcl11b in glioma malignancy and its mechanisms remains to be uncovered. In this study, using the lentivirus-mediated knockdown (KD) approach, we found that Bcl11b KD in tumorigenic C6 cells reduced the cell proliferation, colony formation, and migratory ability. The results were further verified using two human malignant glioma cell lines, U87 and U251 cells. A cyclin-dependent kinase inhibitor p21, a known Bcl11b target, was significantly upregulated in tumorigenic C6, U87, and U251 cells after Bcl11b KD. Cellular senescence was observed by examination of the β-galactosidase activity in U87 and U251 cells with Bcl11b KD. Reduced expression of stemness gene Sox-2 and its downstream effector Bmi-1 was also observed in U87 and U251 cells with Bcl11b KD. These results suggest that the ablation of Bcl11b gene expression induced glioma cell senescence. Propidium iodide (PI) staining combined with flow cytometry analysis also showed that Bcl11b KD led to the cell cycle arrest of U87 and U251 cells at the G0/G1 or at the S phase, indicating that Bcl11b is required for glioma cell cycle progression. Together, this is the first study to show that the inhibition of Bcl11b suppresses glioma cell growth by regulating the expression of the cell cycle regulator p21 and stemness-associated genes (Sox-2/Bmi-1).
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Affiliation(s)
- Chih-Kai Liao
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Kuan-Min Fang
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Kitman Chai
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Chin-Hsien Wu
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Hsin Ho
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Shi Yang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
| | - Shun-Fen Tzeng
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan.
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16
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Li W, Jiang Z, Li T, Wei X, Zheng Y, Wu D, Yang L, Chen S, Xu B, Zhong M, Jiang J, Hu Y, Su H, Zhang M, Huang X, Geng S, Weng J, Du X, Liu P, Li Y, Liu H, Yao Y, Li P. Genome-wide analyses identify KLF4 as an important negative regulator in T-cell acute lymphoblastic leukemia through directly inhibiting T-cell associated genes. Mol Cancer 2015; 14:26. [PMID: 25644173 PMCID: PMC4350611 DOI: 10.1186/s12943-014-0285-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 12/29/2014] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Kruppel-like factor 4 (KLF4) induces tumorigenesis or suppresses tumor growth in a tissue-dependent manner. However, the roles of KLF4 in hematological malignancies and the mechanisms of action are not fully understood. METHODS Inducible KLF4-overexpression Jurkat cell line combined with mouse models bearing cell-derived xenografts and primary T-cell acute lymphoblastic leukemia (T-ALL) cells from four patients were used to assess the functional role of KLF4 in T-ALL cells in vitro and in vivo. A genome-wide RNA-seq analysis was conducted to identify genes regulated by KLF4 in T-ALL cells. Chromatin immunoprecipitation (ChIP) PCR was used to determine direct binding sites of KLF4 in T-ALL cells. RESULTS Here we reveal that KLF4 induced apoptosis through the BCL2/BCLXL pathway in human T-ALL cell lines and primary T-ALL specimens. In consistence, mice engrafted with KLF4-overexpressing T-ALL cells exhibited prolonged survival. Interestingly, the KLF4-induced apoptosis in T-ALL cells was compromised in xenografts but the invasion capacity of KLF4-expressing T-ALL cells to hosts was dramatically dampened. We found that KLF4 overexpression inhibited T cell-associated genes including NOTCH1, BCL11B, GATA3, and TCF7. Further mechanistic studies revealed that KLF4 directly bound to the promoters of NOTCH1, BCL2, and CXCR4 and suppressed their expression. Additionally, KLF4 induced SUMOylation and degradation of BCL11B. CONCLUSIONS These results suggest that KLF4 as a major transcription factor that suppresses the expression of T-cell associated genes, thus inhibiting T-ALL progression.
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Affiliation(s)
- Wei Li
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Zhiwu Jiang
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Tianzhong Li
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Xinru Wei
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Yi Zheng
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Donghai Wu
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Lijian Yang
- Institute of Hematology, Medical College, Jinan University, Guangzhou, 510632, China. .,Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, China.
| | - Shaohua Chen
- Institute of Hematology, Medical College, Jinan University, Guangzhou, 510632, China. .,Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, China.
| | - Bing Xu
- Department of Hematology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China.
| | - Mei Zhong
- Department of Obstetrics and Gynecology, Nan Fang Hospital of Southern Medical University, Guangzhou, 510515, China.
| | - Jue Jiang
- School of Pharmacy, Tongji Medical College, Huazhong Unviersity of Science and Technology, 13 Hangkong Road, Wuhan, 430030, China.
| | - Yufeng Hu
- School of Pharmacy, Tongji Medical College, Huazhong Unviersity of Science and Technology, 13 Hangkong Road, Wuhan, 430030, China.
| | - Hexiu Su
- School of Pharmacy, Tongji Medical College, Huazhong Unviersity of Science and Technology, 13 Hangkong Road, Wuhan, 430030, China.
| | - Minjie Zhang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Shenzhen University Town, Shenzhen, 518055, China.
| | - Xiaojun Huang
- Peking University People's Hospital, Peking University Institute of Hematology, No. 11 Xizhimen South St., Beijing, 100044, China.
| | - Suxia Geng
- Department of Hematology, Guangdong Provincial People's Hospital, Guangzhou, 510500, China.
| | - Jianyu Weng
- Department of Hematology, Guangdong Provincial People's Hospital, Guangzhou, 510500, China.
| | - Xin Du
- Department of Hematology, Guangdong Provincial People's Hospital, Guangzhou, 510500, China.
| | - Pentao Liu
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, England, UK.
| | - Yangqiu Li
- Institute of Hematology, Medical College, Jinan University, Guangzhou, 510632, China. .,Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, 510632, China.
| | - Hudan Liu
- School of Pharmacy, Tongji Medical College, Huazhong Unviersity of Science and Technology, 13 Hangkong Road, Wuhan, 430030, China.
| | - Yao Yao
- Drug Discovery Pipeline, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China.
| | - Peng Li
- Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Science Park, Guangzhou, Guangdong, 510530, China. .,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
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17
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Le Douce V, Cherrier T, Riclet R, Rohr O, Schwartz C. [CTIP2, a multifunctional protein: cellular physiopathology and therapeutic implications]. Med Sci (Paris) 2014; 30:797-802. [PMID: 25174758 DOI: 10.1051/medsci/20143008019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The transcription factor CTIP2 (BCL11B) is a multifunctional protein involved in numerous cell physiological processes. To date, many molecular mechanisms underlying this process have been discovered, which highlighted the importance of the epigenetic regulation of genes and the regulation of the elongation factor P-TEFb. Furthermore studies of the deregulation of CTIP2 showed the association of CTIP2 to numerous pathologies including cancer and cardiac hypertrophy. A better comprehension of the physiopathology of these diseases might lead to the design of therapeutical strategies intending to prevent CTIP2 deregulation. Moreover, CTIP2 and its associated proteins constitute potential targets in strategies aiming to reduce and/or purge HIV-1 cell reservoirs.
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Affiliation(s)
- Valentin Le Douce
- Institut de parasitologie et de pathologie tropicale, EA7292, université de Strasbourg, Strasbourg, France - IUT de Schiltigheim, 1 allée d'Athènes, Schiltigheim, France
| | - Thomas Cherrier
- Laboratory of protein -interactions and signaling, -université de Liège, Liège, Belgique
| | - Raphaël Riclet
- Institut de parasitologie et de pathologie tropicale, EA7292, université de Strasbourg, Strasbourg, France
| | - Olivier Rohr
- Institut de parasitologie et de pathologie tropicale, EA7292, université de Strasbourg, Strasbourg, France - IUT de Schiltigheim, 1 allée d'Athènes, Schiltigheim, France - Institut universitaire de France, 103, boulevard Saint-Michel, 75005 Paris, France
| | - Christian Schwartz
- Institut de parasitologie et de pathologie tropicale, EA7292, université de Strasbourg, Strasbourg, France - IUT de Schiltigheim, 1 allée d'Athènes, Schiltigheim, France
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18
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Vincent-Chong VK, Karen-Ng LP, Abdul Rahman ZA, Yang YH, Anwar A, Zakaria Z, Jayaprasad Pradeep P, Kallarakkal TG, Kiong Tay K, Thomas Abraham M, Mazlipah Ismail S, Zain RB. Distinct pattern of chromosomal alterations and pathways in tongue and cheek squamous cell carcinoma. Head Neck 2014; 36:1268-1278. [PMID: 31615169 DOI: 10.1002/hed.23448] [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: 05/17/2012] [Revised: 05/10/2013] [Accepted: 08/01/2013] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The purpose of this study was to investigate the cause of behavioral difference between tongue and cheek squamous cell carcinomas (SCCs) by verifying the copy number alterations (CNAs). METHODS Array comparative genomic hybridization (aCGH) was used to profile unique deletions and amplifications that are involved with tongue and cheek SCC, respectively. This was followed by pathway analysis relating to CNA genes from both sites. RESULTS The most frequently amplified regions in tongue SCC were 4p16.3, 11q13.4, and 13q34; whereas the most frequently deleted region was 19p12. For cheek SCC, the most frequently amplified region was identified on chromosome 9p24.1-9p23; whereas the most common deleted region was located on chromosome 8p23.1. Further analysis revealed that the most significant unique pathway related to tongue and cheek SCCs was the cytoskeleton remodeling and immune response effect on the macrophage differentiation pathway. CONCLUSION This study has showed the different genetic profiles and biological pathways between tongue and cheek SCCs. © 2013 Wiley Periodicals, Inc. Head Neck 36: 1268-1278, 2014.
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Affiliation(s)
- Vui King Vincent-Chong
- Department of Oral Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.,Oral Cancer Research and Coordinating Center, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Lee Peng Karen-Ng
- Oral Cancer Research and Coordinating Center, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Zainal Ariff Abdul Rahman
- Department of Oral Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.,Oral Cancer Research and Coordinating Center, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Yi-Hsin Yang
- Department of Dental Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung
| | - Arif Anwar
- Sengenics Sdn Bhd, Petaling Jaya, Selangor Darul Ehsan, Malaysia
| | - Zubaidah Zakaria
- Department of Haematology, Institute for Medical Research, Jalan Pahang, Kuala Lumpur, Malaysia
| | - Padmaja Jayaprasad Pradeep
- Oral Cancer Research and Coordinating Center, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Thomas George Kallarakkal
- Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Keng Kiong Tay
- Oral Health Division, Ministry of Health, Putrajaya, Malaysia
| | | | - Siti Mazlipah Ismail
- Department of Oral Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Rosnah Binti Zain
- Oral Cancer Research and Coordinating Center, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.,Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
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19
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Le Douce V, Cherrier T, Riclet R, Rohr O, Schwartz C. The many lives of CTIP2: from AIDS to cancer and cardiac hypertrophy. J Cell Physiol 2014; 229:533-7. [PMID: 24122342 DOI: 10.1002/jcp.24490] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 10/04/2013] [Indexed: 12/27/2022]
Abstract
CTIP2 is a key transcriptional regulator involved in numerous physiological functions. Initial works have shown the importance of CTIP2 in the establishment and persistence of HIV latency in microglial cells, the main latent/quiescent viral reservoir in the brain. Recent studies have highlighted the importance of CTIP2 in several other pathologies, such as cardiac hypertrophy and various types of human malignancies. Targeting CTIP2 may therefore constitute a new approach in the treatment of these pathologies.
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Affiliation(s)
- Valentin Le Douce
- Institut de Parasitologie et de Pathologie Tropicale, EA7292, Université de Strasbourg, Strasbourg, France; IUT de Schiltigheim, 1 Allée d'Athènes, Schiltigheim, France
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20
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Zhu L, Zhang F, Shen Q, Chen S, Wang X, Wang L, Yang L, Wu X, Huang S, Schmidt CA, Li Y. Characteristics of A20 gene polymorphisms in T-cell acute lymphocytic leukemia. Hematology 2014; 19:448-54. [PMID: 24611736 DOI: 10.1179/1607845414y.0000000160] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Affiliation(s)
- Lihua Zhu
- Department of Rheumatism and ImmunologyFirst Hospital Affiliated, Jinan University, Guangzhou, China
- Institute of HematologyJinan University, Guangzhou, China
| | - Fan Zhang
- Institute of HematologyJinan University, Guangzhou, China
| | - Qi Shen
- Institute of HematologyJinan University, Guangzhou, China
| | - Shaohua Chen
- Institute of HematologyJinan University, Guangzhou, China
| | - Xu Wang
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan University, Guangzhou, China
| | - Liang Wang
- Department of OncologyFirst Hospital Affiliated, Jinan University, Guangzhou, China
| | - Lijian Yang
- Institute of HematologyJinan University, Guangzhou, China
| | - Xiuli Wu
- Institute of HematologyJinan University, Guangzhou, China
| | - Suming Huang
- Department of Biochemistry and Molecular BiologyCollege of Medicine, University of Florida, Gainesville, FL, USA
| | - Christian A. Schmidt
- Department of Hematology and OncologyErnst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - Yangqiu Li
- Institute of HematologyJinan University, Guangzhou, China
- Key Laboratory for Regenerative Medicine of Ministry of EducationJinan University, Guangzhou, China
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21
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Novel somatic mutations in large granular lymphocytic leukemia affecting the STAT-pathway and T-cell activation. Blood Cancer J 2013; 3:e168. [PMID: 24317090 PMCID: PMC3877422 DOI: 10.1038/bcj.2013.65] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 11/06/2013] [Indexed: 12/22/2022] Open
Abstract
T-cell large granular lymphocytic (T-LGL) leukemia is a clonal disease characterized by the expansion of mature CD3+CD8+ cytotoxic T cells. It is often associated with autoimmune disorders and immune-mediated cytopenias. Our recent findings suggest that up to 40% of T-LGL patients harbor mutations in the STAT3 gene, whereas STAT5 mutations are present in 2% of patients. In order to identify putative disease-causing genetic alterations in the remaining T-LGL patients, we performed exome sequencing from three STAT mutation-negative patients and validated the findings in 113 large granular lymphocytic (LGL) leukemia patients. On average, 11 CD8+ LGL leukemia cell-specific high-confidence nonsynonymous somatic mutations were discovered in each patient. Interestingly, all patients had at least one mutation that affects either directly the STAT3-pathway (such as PTPRT) or T-cell activation (BCL11B, SLIT2 and NRP1). In all three patients, the STAT3 pathway was activated when studied by RNA expression or pSTAT3 analysis. Screening of the remaining 113 LGL leukemia patients did not reveal additional patients with same mutations. These novel mutations are potentially biologically relevant and represent rare genetic triggers for T-LGL leukemia, and are associated with similar disease phenotype as observed in patients with mutations in the STAT3 gene.
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22
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Shen Q, Liu S, Chen Y, Yang L, Chen S, Wu X, Li B, Lu Y, Zhu K, Li Y. Proliferation inhibition and apoptosis induction of imatinib-resistant chronic myeloid leukemia cells via PPP2R5C down-regulation. J Hematol Oncol 2013; 6:64. [PMID: 24004697 PMCID: PMC3847136 DOI: 10.1186/1756-8722-6-64] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Accepted: 08/31/2013] [Indexed: 11/15/2022] Open
Abstract
Despite the success of imatinib and other tyrosine kinase inhibitors (TKIs), chronic myeloid leukemia (CML) remains largely incurable, and a number of CML patients die due to Abl mutation-related drug resistance and blast crisis. The aim of this study was to evaluate proliferation inhibition and apoptosis induction by down-regulating PPP2R5C gene expression in the imatinib-sensitive and imatinib-resistant CML cell lines K562, K562R (imatinib resistant without an Abl gene mutation), 32D-Bcr-Abl WT (imatinib-sensitive murine CML cell line with a wild type Abl gene) and 32D-Bcr-Abl T315I (imatinib resistant with a T315I Abl gene mutation) and primary cells from CML patients by RNA interference. PPP2R5C siRNAs numbered 799 and 991 were obtained by chemosynthesis. Non-silencing siRNA scrambled control (SC)-treated, mock-transfected, and untreated cells were used as controls. The PPP2R5C mRNA and protein expression levels in treated CML cells were analyzed by quantitative real-time PCR and Western blotting, and in vitro cell proliferation was assayed with the cell counting kit-8 method. The morphology and percentage of apoptosis were revealed by Hoechst 33258 staining and flow cytometry (FCM). The results demonstrated that both siRNAs had the best silencing results after nucleofection in all four cell lines and primary cells. A reduction in PPP2R5C mRNA and protein levels was observed in the treated cells. The proliferation rate of the PPP2R5C-siRNA-treated CML cell lines was significantly decreased at 72 h, and apoptosis was significantly increased. Significantly higher proliferation inhibition and apoptosis induction were found in K562R cells treated with PPP2R5C-siRNA799 than K562 cells. In conclusion, the suppression of PPP2R5C by RNA interference could inhibit proliferation and effectively induce apoptosis in CML cells that were either imatinib sensitive or resistant. Down-regulating PPP2R5C gene expression might be considered as a new therapeutic target strategy for CML, particularly for imatinib-resistant CML.
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Affiliation(s)
- Qi Shen
- Institute of Hematology, Jinan University, Guangzhou 510632, China.
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23
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Chen Y, Liu S, Shen Q, Zha X, Zheng H, Yang L, Chen S, Wu X, Li B, Li Y. Differential gene expression profiles of PPP2R5C-siRNA-treated malignant T cells. DNA Cell Biol 2013; 32:573-81. [PMID: 23941244 DOI: 10.1089/dna.2013.2138] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Recently, alterations in the expression pattern of PPP2R5C associated with malignant transformation have been characterized, and PPP2R5C overexpression was demonstrated in leukemias. To confirm the role of PPP2R5C in proliferation and its molecular mechanism, three PPP2R5C-siRNAs and a scrambled nonsilencing siRNA control were used to treat Molt-4 and Jurkat T cells. After nucleofection, PPP2R5C expression and biological consequences based on a highly efficient and specific PPP2R5C-siRNA were demonstrated by qRT-PCR, CCK-8 assay, Annexin V/PI, and flow cytometry. The global gene expression profile of PPP2R5C-siRNA-treated Jurkat T cells was established. A significant reduction in the PPP2R5C mRNA level was observed at 24 to 72 h in Molt-4 and Jurkat T cells with all of the PPP2R5C-siRNAs. The proliferation rate of Molt-4 and Jurkat T cells transfected with different PPP2R5C-siRNAs was significantly decreased at 72 h compared with the control (p<0.05). However, the transfected cells did not show a significant increase in Annexin V/PI-positive cells (apoptosis). The highly efficient PPP2R5C-siRNA2 was used to treat Jurkat T cells for gene expression profile analysis. In total, 439 genes were upregulated, and 524 genes were downregulated at least twofold in PPP2R5C-siRNA-treated Jurkat T cells. Changes in signaling pathway genes closely related to the TCR, Wnt, calcium, MAPK, and p53 signaling pathways were observed. In conclusion, the suppression of PPP2R5C by RNA interference could effectively inhibit the proliferation of leukemic T cells, the PPP2R5C-siRNA treatment altered gene expression profiles, and the differential expression of the glycogen synthase kinase 3 beta (GSK-3β), ataxia telangiectasia mutated (ATM), and Mdm2 p53 binding protein homolog (MDM2) genes may play an important role in the effects of PPP2R5C knockdown in Jurkat T cells.
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Affiliation(s)
- Yu Chen
- 1 Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University , Guangzhou, China
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24
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Shen Q, Huang X, Chen S, Yang L, Chen S, Li B, Wu X, Grabarczyk P, Przybylski GK, Schmidt CA, Li Y. BCL11B suppression does not influence CD34(+) cell differentiation and proliferation. ACTA ACUST UNITED AC 2013; 17:329-33. [PMID: 23168072 DOI: 10.1179/1024533212z.000000000145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The B-cell chronic lymphocytic leukemia (CLL)/lymphoma 11B (BCL11B) gene plays a critical role in T-cell differentiation and proliferation. However, little is understood about the role of BCL11B in human hematopoietic stem/progenitor cells. Small interfering RNA (siRNA)-mediated suppression of the BCL11B was shown to induce apoptosis in human T-cell acute lymphoblastic leukemia cells. To further characterize the role of BCL11B in hematopoietic stem/progenitor cells and assess the safety of siRNA-mediated targeted therapy, the in vitro differentiation and proliferation of CD34(+) cells after BCL11B-siRNA935 treatment were studied. CD34(+) cells were sorted from three cases of umbilical cord blood by the magnetic activated cell sorting technique, and the purity was identified by flow cytometry. BCL11B-siRNA935 was delivered into CD34(+) cells by nucleofection and the BCL11B expression level was analyzed by quantitative real-time polymerase chain reaction. Erythroid burst-forming units (BFU-E), granulocyte/macrophage colony-forming units (CFU-GM), and megakaryocyte colony-forming units (CFU-Meg) were assessed using BCL11B-siRNA935-treated CD34(+) cells by the methylcellulose semi-solid culture method. The BCL11B expression level in CD34(+) cells was significantly lower than that in Molt-4 cells and peripheral blood mononuclear cells from healthy individuals. An approximate one-fold reduction in the BCL11B mRNA level was observed 24 hours post-transfection with BCL11B-siRNA935. However, there was no significant difference on the colony formation ability of BFU-E, CFU-GM, and CFU-Meg for CD34(+) cells between the BCL11B-siRNA935-treated and mock-transfected groups (P > 0.05). BCL11B suppression by RNA interference had no significant influence on the differentiation and proliferation of CD34(+) cells. In conclusion, the BCL11B-siRNA935 used in this study may be safe, and BCL11B may be considered a new candidate for targeted gene therapy in T-cell malignancies.
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Affiliation(s)
- Qi Shen
- Institute of Hematology, Medical College, Jinan University, Guangzhou, PR China
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25
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Li P, Xiao Y, Liu Z, Liu P. Using mouse models to study function of transcriptional factors in T cell development. CELL REGENERATION (LONDON, ENGLAND) 2012; 1:8. [PMID: 25408871 PMCID: PMC4230505 DOI: 10.1186/2045-9769-1-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 10/08/2012] [Indexed: 02/03/2023]
Abstract
Laboratory mice have widely been used as tools for basic biological research and models for studying human diseases. With the advances of genetic engineering and conditional knockout (CKO) mice, we now understand hematopoiesis is a dynamic stepwise process starting from hematopoietic stem cells (HSCs) which are responsible for replenishing all blood cells. Transcriptional factors play important role in hematopoiesis. In this review we compile several studies on using genetic modified mice and humanized mice to study function of transcriptional factors in lymphopoiesis, including T lymphocyte and Natural killer (NK) cell development. Finally, we focused on the key transcriptional factor Bcl11b and its function in regulating T cell specification and commitment.
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Affiliation(s)
- Peng Li
- Key Laboratory of Regenerative Biology, Guangzchou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
| | - Yiren Xiao
- Key Laboratory of Regenerative Biology, Guangzchou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
| | - Zhixin Liu
- Key Laboratory of Regenerative Biology, Guangzchou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
| | - Pentao Liu
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH UK
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26
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Gao Y, Wu H, He D, Hu X, Li Y. Downregulation of BCL11A by siRNA induces apoptosis in B lymphoma cell lines. Biomed Rep 2012; 1:47-52. [PMID: 24648892 DOI: 10.3892/br.2012.9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 08/28/2012] [Indexed: 01/24/2023] Open
Abstract
The B-cell chronic lymphocytic leukemia (CLL)/lymphoma 11A gene (BCL11A) encodes a krüppel-like zinc finger protein, which is important in thymopoiesis and has been associated with hematopoietic malignancies. In this study, we investigated whether the downregulation of BCL11A mRNA by small interference RNA (siRNA) was capable of inducing apoptosis, and tested the effect of BCL11A siRNA combined with BCL2 siRNA in B lymphoma cell lines (SUDHL6, EB1). BCL11A siRNA was transfected into SUDHL6, EB1 cells with HiPerfect transfection reagents. After transient transfection with BCL11A siRNA, the expression levels of BCL11A mRNA and protein were assayed by quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot analysis. The cell proliferation was determined by a cell counting kit-8 (CCK8) assay. Apoptosis was determined by morphological observation and flow cytometric analysis. The results showed that the expression levels of BCL11A mRNA and protein from SUDHL6, EB1 cells transfected with BCL11A siRNA decreased, compared with either the scrambled negative control siRNA group or untransfected cells group (P<0.05). Viability of cells transfected with BCL11A siRNA was less compared to cells transfected with control siRNA and untransfected SUDHL6, EB1 cells, respectively (P<0.05). BCL11A siRNA induced apoptosis in both SUDHL6 and EB1 cells. BCL11A siRNA combined with BCL2 siRNA significantly inhibited cell growth. Apoptotic rates of SUDHL6, EB1 cells treated with BCL11A siRNA combined with BCL2 siRNA significantly increased (P<0.05), compared with either the scrambled control (Sc) siRNA and BCL2 siRNA combination or BCL2 or BCL11A siRNA-treated cells alone. Findings of this study suggest the downregulation of BCL11A mRNA by siRNA was able to induce apoptosis. Moreover, BCL11A siRNA combined with BCL2 siRNA increased apoptosis in SUDHL6, EB1 cells. Thus, suppression of BCL11A expression may be a useful approach in the treatment of B lymphoma.
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Affiliation(s)
| | - Hong Wu
- Institute of Hematology, Medical College
| | - Dongmei He
- Institute of Hematology, Medical College
| | - Xiaomao Hu
- Institute of Hematology, Medical College
| | - Yangqiu Li
- Institute of Hematology, Medical College; ; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou, Guangdong 510632, P.R. China
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27
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Huang X, Du X, Li Y. The role of BCL11B in hematological malignancy. Exp Hematol Oncol 2012; 1:22. [PMID: 23211040 PMCID: PMC3514087 DOI: 10.1186/2162-3619-1-22] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 08/08/2012] [Indexed: 11/10/2022] Open
Abstract
The B-cell leukemia/lymphoma 11B (BCL11B) gene is a member of the BCL family which plays a crucial role in the development, proliferation, differentiation and subsequent survival of T cells. BCL11B gene alterations are related to malignant T cell transformation that occurs in hematological malignancies. Remarkably, the BCL11B gene is responsible for the regulation of the apoptotic process and cell proliferation. This review summarizes current data and knowledge concerning the alteration of BCL11B in hematological malignancies and its role as a potential target for therapies directed against T cell malignancies.
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Affiliation(s)
- Xin Huang
- Institute of Hematology, Medical College, Jinan University, Guangzhou, 510632, China.
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28
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The role of BCL11B in regulating the proliferation of human naive T cells. Hum Immunol 2012; 73:456-64. [PMID: 22426257 DOI: 10.1016/j.humimm.2012.02.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 02/11/2012] [Accepted: 02/27/2012] [Indexed: 11/23/2022]
Abstract
The effect of the B-cell chronic lymphocytic leukemia/lymphoma 11B gene (BCL11B) on human T-cell regulation remains unclear. To characterize the functions of BCL11B, recombinant BCL11B and BCL11B siRNA were transfected into human naive T cells to overexpress or knock down BCL11B expression, respectively. After BCL11B overexpression, the proliferation ability and the T-helper (Th) subset were increased, whereas no significant alteration in the expression pattern and clonality of the T-cell receptor Vβ subfamilies was observed. After BCL11B knockdown, a similar distribution of Vβ subfamilies was detected in the naive T cells; however, the proliferation capacity substantially decreased. Global gene expression profiling revealed that the dysregulated genes were mainly involved in T-cell activation and proliferation. BCL11B could selectively promote Th-cell differentiation because of increased CXCL10 and CXCL11 expression. BCL11B suppression may inhibit proliferation and induce apoptosis, which may relate to changes in the expression of CFLAR-CASP8-CASP10 in the mitochondrial pathways. In conclusion, BCL11B is required for T-cell survival; its overexpression could effectively increase the T-cell activation and proliferation abilities and Th-cell differentiation as well.
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