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Pluta AJ, Studniarek C, Murphy S, Norbury CJ. Cyclin-dependent kinases: Masters of the eukaryotic universe. WILEY INTERDISCIPLINARY REVIEWS. RNA 2023; 15:e1816. [PMID: 37718413 PMCID: PMC10909489 DOI: 10.1002/wrna.1816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/21/2023] [Accepted: 08/03/2023] [Indexed: 09/19/2023]
Abstract
A family of structurally related cyclin-dependent protein kinases (CDKs) drives many aspects of eukaryotic cell function. Much of the literature in this area has considered individual members of this family to act primarily either as regulators of the cell cycle, the context in which CDKs were first discovered, or as regulators of transcription. Until recently, CDK7 was the only clear example of a CDK that functions in both processes. However, new data points to several "cell-cycle" CDKs having important roles in transcription and some "transcriptional" CDKs having cell cycle-related targets. For example, novel functions in transcription have been demonstrated for the archetypal cell cycle regulator CDK1. The increasing evidence of the overlap between these two CDK types suggests that they might play a critical role in coordinating the two processes. Here we review the canonical functions of cell-cycle and transcriptional CDKs, and provide an update on how these kinases collaborate to perform important cellular functions. We also provide a brief overview of how dysregulation of CDKs contributes to carcinogenesis, and possible treatment avenues. This article is categorized under: RNA Interactions with Proteins and Other Molecules > RNA-Protein Complexes RNA Processing > 3' End Processing RNA Processing > Splicing Regulation/Alternative Splicing.
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Affiliation(s)
| | | | - Shona Murphy
- Sir William Dunn School of PathologyUniversity of OxfordOxfordUK
| | - Chris J. Norbury
- Sir William Dunn School of PathologyUniversity of OxfordOxfordUK
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2
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Pu JJ, Savani M, Huang N, Epner EM. Mantle cell lymphoma management trends and novel agents: where are we going? Ther Adv Hematol 2022; 13:20406207221080743. [PMID: 35237397 PMCID: PMC8882940 DOI: 10.1177/20406207221080743] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 01/31/2022] [Indexed: 11/20/2022] Open
Abstract
The heterogeneity in disease pathology, the unpredictability in disease
prognosis, and the variability in response to therapy make mantle cell lymphoma
(MCL) a focus of novel therapeutic development. MCL is characterized by
dysregulated expression of cyclin D1 through a chromosome
t(11;14) translocation. MCL international prognostic index
(MIPI), ki-67 proliferation index, and TP53
mutation status are currently utilized for prognostication. With advances in
pharmacokinetic analysis and drug discovery, treatment strategy has evolved from
chemotherapy to combination of targeted, epigenetic, and immune therapies. In
this review, we discuss investigational and newly approved treatment approaches.
In a short time, the US Food and Drug Administration (FDA) has approved five
agents for the treatment of MCL: lenalidomide, an immunomodulatory agent;
bortezomib, a proteasome inhibitor; and ibrutinib, acalabrutinib, and
zanubrutinib, all Bruton kinase inhibitors. Epigenetic agents (e.g. cladribine
and vorinostat), mammalian target of rapamycin (mTOR) inhibitors (e.g.
temsirolimus and everolimus), and monoclonal antibodies and/or antibody-drug
conjugates (e.g. obinutuzumab, polatuzumab, and ublituximab) are promising
therapeutic agents currently under clinical trial investigation. Most recently,
chimeric antigen receptor (CAR)-T cell therapy and bispecific T-cell engager
(BiTE) therapy even open a new venue for MCL treatment. However, due to its
intricate pathology nature and high relapse incidence, there are still unmet
needs in developing optimal therapeutic strategies for both frontline and
relapsed/refractory settings. The ultimate goal is to develop innovative
personalized combination therapy approaches for the purpose of delivering
precision medicine to cure this disease.
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Affiliation(s)
- Jeffrey J. Pu
- University of Arizona Cancer Center, 1515 N Campbell Avenue, Room #1968C, Tucson, AZ 85724, USA
| | - Malvi Savani
- University of Arizona Cancer Center, Tucson, AZ, USA
| | - Nick Huang
- State University of New York Upstate Medical University, Syracuse, NY, USA
| | - Elliot M. Epner
- Penn State Hershey Cancer Institute, 100 University Drive, Hershey, PA, USA
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3
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Spurgeon SE, Sharma K, Claxton DF, Ehmann C, Pu J, Shimko S, Stewart A, Subbiah N, Palmbach G, LeBlanc F, Latour E, Chen Y, Mori M, Hasanali Z, Epner EM. Phase 1-2 study of vorinostat (SAHA), cladribine and rituximab (SCR) in relapsed B-cell non-Hodgkin lymphoma and previously untreated mantle cell lymphoma. Br J Haematol 2019; 186:845-854. [PMID: 31177537 DOI: 10.1111/bjh.16008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/09/2019] [Indexed: 12/11/2022]
Abstract
Altered DNA methylation and histone acetylation in lymphoma provided the rationale for using vorinostat (SAHA), cladribine and rituximab (SCR) in non-Hodgkin lymphomas (NHL) in this phase 1-2 study (NCT00764517). Treatment included cladribine 5 mg/m2 intravenously (IV) (days 1-5), rituximab 375 mg/m2 IV (weekly 4× for cycle 1 and 1×/month) and vorinostat orally once daily (days 1-14) every 28 days for up to six cycles. Phase 1 included relapsed patients (n = 10) in a standard 3 + 3 dose escalation design (vorinostat: 200, 300 and 400 mg). No dose-limiting toxicities were seen. The phase 2 dose for vorinostat was 400 mg po (days 1-14). The majority of phase 2 patients had mantle cell lymphoma (MCL) (n = 57; 39 previously untreated, 10 relapsed). The primary objective was objective response rate [complete response (CR) + partial response] which was 39% (7/18) in relapsed patients and 97% (38/39) with 80% (31/39) attaining a CR in previously untreated MCL. At a median follow-up of 42 months, median progression-free survival (PFS) and overall survival (OS) for relapsed NHL were 19·5 [95% confidence interval (CI): 2·0-33·0] and 25·0 (95% CI: 12·0-45·0) months respectively. Median PFS for previously untreated MCL was 84·0 months; OS could not be estimated. Toxicities were primarily haematological.
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Affiliation(s)
- Stephen E Spurgeon
- Center for Hematologic Malignancies, Knight Cancer Institute at Oregon Health & Science University, Portland, OR, USA
| | - Kamal Sharma
- Penn State Hershey Cancer Institute, Hershey, PA, USA.,Cassidy Cancer Center, Winter Haven, FL, USA
| | | | | | - Jeffrey Pu
- Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Sara Shimko
- Penn State Hershey Cancer Institute, Hershey, PA, USA
| | | | - Nan Subbiah
- Center for Hematologic Malignancies, Knight Cancer Institute at Oregon Health & Science University, Portland, OR, USA
| | - Gundula Palmbach
- Center for Hematologic Malignancies, Knight Cancer Institute at Oregon Health & Science University, Portland, OR, USA
| | - Francis LeBlanc
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Emile Latour
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - YiYi Chen
- Biostatistics Shared Resource, Oregon Health and Science University, Portland, OR, USA
| | - Motomi Mori
- Biostatistics Shared Resource, Oregon Health and Science University, Portland, OR, USA
| | | | - Elliot M Epner
- Penn State Hershey Cancer Institute, Hershey, PA, USA.,Enloe Medical Center, Chico, CA, USA
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4
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Fan H, Cui Z, Zhang H, Kailasam Mani SK, Diab A, Lefrancois L, Fares N, Merle P, Andrisani O. DNA demethylation induces SALL4 gene re-expression in subgroups of hepatocellular carcinoma associated with Hepatitis B or C virus infection. Oncogene 2017; 36:2435-2445. [PMID: 27797380 PMCID: PMC5408304 DOI: 10.1038/onc.2016.399] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 08/16/2016] [Accepted: 09/18/2016] [Indexed: 02/06/2023]
Abstract
Sal-like protein 4 (SALL4), an embryonic stem cell transcriptional regulator, is re-expressed by an unknown mechanism in poor prognosis hepatocellular carcinoma (HCC), often associated with chronic hepatitis B virus (HBV) infection. Herein, we investigated the mechanism of SALL4 re-expression in HBV-related HCCs. We performed bisulfite sequencing PCR of genomic DNA isolated from HBV-related HCCs and HBV replicating cells, and examined DNA methylation of a CpG island located downstream from SALL4 transcriptional start site (TSS). HBV-related HCCs expressing increased SALL4 exhibited demethylation of specific CpG sites downstream of SALL4 TSS. Similarly, SALL4 re-expression and demethylation of these CpGs was observed in HBV replicating cells. SALL4 is also re-expressed in poor prognosis HCCs of other etiologies. Indeed, increased SALL4 expression in hepatitis C virus-related HCCs correlated with demethylation of these CpG sites. To understand how CpG demethylation downstream of SALL4 TSS regulates SALL4 transcription, we quantified by chromatin immunoprecipitation (ChIP) assays RNA polymerase II occupancy of SALL4 gene, as a function of HBV replication. In absence of HBV replication, RNA polymerase II associated with SALL4 exon1. By contrast, in HBV replicating cells RNA polymerase II occupancy of all SALL4 exons increased, suggesting CpG demethylation downstream from SALL4 TSS influences SALL4 transcriptional elongation. Intriguingly, demethylated CpGs downstream from SALL4 TSS are within binding sites of octamer-binding transcription factor 4 (OCT4) and signal transducer and activator of transcription3 (STAT3). ChIP assays confirmed occupancy of these sites by OCT4 and STAT3 in HBV replicating cells, and sequential ChIP assays demonstrated co-occupancy with chromatin remodeling BRG1/Brahma-associated factors. BRG1 knockdown reduced SALL4 expression, whereas BRG1 overexpression increased SALL4 transcription in HBV replicating cells. We conclude demethylation of CpGs located within OCT4 and STAT3 cis-acting elements, downstream of SALL4 TSS, enables OCT4 and STAT3 binding, recruitment of BRG1, and enhanced RNA polymerase II elongation and SALL4 transcription.
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Affiliation(s)
- Huitao Fan
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
| | - Zhibin Cui
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
| | - Hao Zhang
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
| | - Saravana Kumar Kailasam Mani
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
| | - Ahmed Diab
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
| | - Lydie Lefrancois
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052, CNRS 5286, Lyon Cedex, France
| | - Nadim Fares
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052, CNRS 5286, Lyon Cedex, France
| | - Philippe Merle
- Centre de Recherche en Cancérologie de Lyon, UMR INSERM 1052, CNRS 5286, Lyon Cedex, France
| | - Ourania Andrisani
- Department of Basic Medical Sciences, Purdue University, West Lafayette IN 47907
- Purdue Center for Cancer Research, Purdue University, West Lafayette IN 47907
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5
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Histone deacetylase inhibitor abexinostat affects chromatin organization and gene transcription in normal B cells and in mantle cell lymphoma. Gene 2016; 580:134-143. [DOI: 10.1016/j.gene.2016.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/05/2016] [Accepted: 01/11/2016] [Indexed: 12/26/2022]
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6
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Histone deacetylase inhibitors and epigenetic regulation in lymphoid malignancies. Invest New Drugs 2015; 33:1280-91. [PMID: 26423245 DOI: 10.1007/s10637-015-0290-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/15/2015] [Indexed: 12/13/2022]
Abstract
A vast majority of lymphomas and leukaemias are results of translocations. These translocations produce various genetic and epigenetic changes that lead to oncogenesis. This opens an opportunity to use a relatively new class of anti-cancer agents, inhibitors of histone deacetylases (HDACi) to target lymphoid malignancies. Surprisingly, the rational basis for treatment of lymphomas with HDACi is far from clear, although some positive results have been obtained. Here we analyze the effect of histone deacetylase (HDAC) inhibitors on lymphoid malignancies.
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7
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Allinne J, Pichugin A, Iarovaia O, Klibi M, Barat A, Zlotek-Zlotkiewicz E, Markozashvili D, Petrova N, Camara-Clayette V, Ioudinkova E, Wiels J, Razin SV, Ribrag V, Lipinski M, Vassetzky YS. Perinucleolar relocalization and nucleolin as crucial events in the transcriptional activation of key genes in mantle cell lymphoma. Blood 2014; 123:2044-53. [PMID: 24452204 DOI: 10.1182/blood-2013-06-510511] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
In mantle cell lymphoma (MCL), one allele of the cyclin D1 (Ccnd1) gene is translocated from its normal localization on chromosome 11 to chromosome 14. This is considered as the crucial event in the transformation process of a normal naive B-cell; however, the actual molecular mechanism leading to Ccnd1 activation remains to be deciphered. Using a combination of three-dimensional and immuno-fluorescence in situ hybridization experiments, the radial position of the 2 Ccnd1 alleles was investigated in MCL-derived cell lines and malignant cells from affected patients. The translocated Ccnd1 allele was observed significantly more distant from the nuclear membrane than its nontranslocated counterpart, with a very high proportion of IgH-Ccnd1 chromosomal segments localized next to a nucleolus. These perinucleolar areas were found to contain active RNA polymerase II (PolII) clusters. Nucleoli are rich in nucleolin, a potent transcription factor that we found to bind sites within the Ccnd1 gene specifically in MCL cells and to activate Ccnd1 transcription. We propose that the Ccnd1 transcriptional activation in MCL cells relates to the repositioning of the rearranged IgH-Ccnd1-carrying chromosomal segment in a nuclear territory with abundant nucleolin and active PolII molecules. Similar transforming events could occur in Burkitt and other B-cell lymphomas.
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Affiliation(s)
- Jeanne Allinne
- Unité Mixte de Recherche 8126, Université Paris-Sud, National Centre for Scientific Research, Institut de Cancérologie Gustave Roussy, Villejuif, France
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8
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Abstract
In this issue of Blood, Allinne et al propose the nucleolin-dependent activation of the translocated CCND1 allele in mantle cell lymphoma (MCL) because of its relocalization to a transcriptionally favorable area in the perinucleolar region.
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Affiliation(s)
- Sílvia Beà
- INSTITUT D'INVESTIGACIONS BIOMÈDIQUES AUGUST PI I SUNYER
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9
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Neri P, Bahlis NJ. Genomic instability in multiple myeloma: mechanisms and therapeutic implications. Expert Opin Biol Ther 2013; 13 Suppl 1:S69-82. [PMID: 23782016 DOI: 10.1517/14712598.2013.814637] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Clonal plasma cells in multiple myeloma (MM) are typified by their nearly universal aneuploidy and the presence of recurrent chromosomal aberrations reflecting their chromosomal instability. Multiple myeloma is also recognized to be heterogeneous with distinct molecular subgroups. Deep genome sequencing studies have recently revealed an even wider heterogeneity and genomic instability with the identification of a complex mutational landscape and a branching pattern of clonal evolution. AREAS COVERED Despite the lack of full understanding of the exact mechanisms driving the genomic instability in MM, recent observations have correlated these abnormalities with impairments in the DNA damage repair machinery as well as epigenetic changes. These mechanisms and the resulting therapeutic implications will be the subject of this review. EXPERT OPINION By providing growth advantage of the fittest clone and promoting the acquisition of drug resistance, genomic instability is unarguably beneficial to MM cells, however, it may also well be its Achilles heal by creating exploitable vulnerabilities. As such, targeting presumptive DNA repair defects and other oncogenic addictions represent a promising area of clinical investigation. In particular, by inducing gene or pathway dependencies not present in normal cells, genomic instability can generate targets of contextual synthetic lethality in MM cells.
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Affiliation(s)
- Paola Neri
- University of Calgary, Division of Hematology and Bone Marrow Transplant, Hospital Drive NW, Calgary, AB T2N4N1, Canada
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10
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Zhang B, Zhang A, Zhou X, Webb P, He W, Xia X. Thyroid Hormone Analogue Stimulates Keratinocyte Proliferation but Inhibits Cell Differentiation in Epidermis. Int J Immunopathol Pharmacol 2012; 25:859-69. [DOI: 10.1177/039463201202500404] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Gross clinical manifestations of thyroid hormone (TH) imbalance are often first seen in the skin where TH plays an integral role in sustaining natural function. Although mounting evidence suggests that TH plays an important role in epidermal proliferation and wound healing, the physiologic role of thyroid hormone in skin is not well understood. In the current study, we investigated the effect of a natural thyroid hormone analogue-3, 3', 5-triiodo-thyroacetic acid (TRIAC) on regulating proliferation and differentiation and its possible molecular mechanism in normal human epidermal keratinocytes and C57BL/6 mice. We determined that TRIAC could stimulate epidermal thickening in mice and promote human keratinocyte proliferation by activating Cyclin D1 expression and promoting entrance into S phase. Moreover, TRIAC might inhibit cell differentiation through repressing the expression of Casein Kinase 1 (CK1), which is a key regulatory protein involved in the control of cell differentiation. Taken together, our data explored the physiologic effect of TRIAC on skin and the possible molecular mechanism of TRIAC, which might be an interesting compound for the treatment of hyperkeratotic skin disorders.
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Affiliation(s)
- B. Zhang
- Center for Genomic Medicine, The Methodist Hospital Research Institute, TX, USA
- Department of Dermatology, Second Affiliated Hospital of Third Military Medical University, Chongqing, China
| | - A. Zhang
- Center for Genomic Medicine, The Methodist Hospital Research Institute, TX, USA
| | - X. Zhou
- Department of Internal Medicine, Division of Rheumatology and Clinical, Immunogenetics, University of Texas Medical School at Houston, TX, USA
| | - P. Webb
- Center for Genomic Medicine, The Methodist Hospital Research Institute, TX, USA
| | - W. He
- Department of Dermatology, Second Affiliated Hospital of Third Military Medical University, Chongqing, China
| | - X. Xia
- Center for Genomic Medicine, The Methodist Hospital Research Institute, TX, USA
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Luo SQ, Hu JP, Qu Q, Li J, Ren W, Zhang JM, Zhong Y, Hu WX. The effects of promoter methylation on downregulation of DAZAP2 in multiple myeloma cell lines. PLoS One 2012; 7:e40475. [PMID: 22792345 PMCID: PMC3392238 DOI: 10.1371/journal.pone.0040475] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 06/08/2012] [Indexed: 01/10/2023] Open
Abstract
Our previous studies had shown that DAZAP2 was profoundly downregulated in bone marrow mononuclear cells from multiple myeloma patients. In this report, we analyzed epigenetic changes in multiple myeloma cell lines to understand the molecular mechanisms underlying the downregulation of DAZAP2. Four multiple myeloma cell lines, KM3, MM.1S, OPM-2 and ARH-77, were studied. The results of methylation specific PCR (MSP) showed that the promoter of DAZAP2 was methylated for KM3, MM.1S, OPM-2 and unmethylated for ARH-77. The DAZAP2 promoter region was amplified to obtain a series of different length sequences. All of the amplified sequences were inserted to luciferase reporter vector. The constructs were transfected into COS-7 cells and the luciferase activities were measured to search for the core region of DAZAP2 promoter. Two CpG islands were found in DAZAP2 promoter region. The results of luciferase assay showed that CpG island 1 displayed weak transcriptional activity, whereas CpG island 2 exhibited strong transcriptional activity (273 folds) compared to the control. The sequence that covered both CpG islands 1 and 2 showed higher activity (1,734 folds) compared to the control, suggesting that the two islands had synergistic effect on regulating DAZAP2 expression. We also found that M. Sss I methylase could inhibit the luciferase activity, whereas demethylation using 5-aza-2′-deoxycytidine treatment rescued the expression of DAZAP2 for multiple myeloma cell lines. These data revealed that methylation of DAZAP2 promoter was involved in downregulation of DAZAP2 in multiple myeloma cells.
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Affiliation(s)
- Sai-Qun Luo
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Jing-Ping Hu
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Qiang Qu
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Jiang Li
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Wei Ren
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Jia-Ming Zhang
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Yan Zhong
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
| | - Wei-Xin Hu
- Molecular Biology Research Center, Xiangya School of Medicine, Central South University, Changsha, Hunan, People’s Republic of China
- * E-mail:
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12
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Hasanali Z, Sharma K, Epner E. Flipping the cyclin D1 switch in mantle cell lymphoma. Best Pract Res Clin Haematol 2012; 25:143-52. [PMID: 22687450 DOI: 10.1016/j.beha.2012.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Mantle cell lymphoma (MCL) is a rare, aggressive subtype of B cell NHL for which there is no standard of care. It is characterized by the t(11;14) translocation, implicating cyclin D1 (CCND1) in its pathogenesis. Cyclin D1 is one of a family of 3 unlinked D type cyclin genes, CCND1, 2, 3. CCND1 is not expressed in normal B cells. Deregulated expression occurs as a result of juxtaposition of cis IgH enhancer elements, Eμ and 3' Cα, to the cyclin D1 gene. These enhancer elements and regions upstream of the CCND1 gene are hypomethylated on the translocated allele. Histones surrounding the translocation have shown hyperacetylation as well, a hallmark of transcriptionally active chromatin. The t(11;14) translocation is an epigenetic event, leading to cyclin D1 deregulated transcription. These findings provide the rationale for the use of epigenetic and targeted cyclin D1 therapies to overcome resistance and induce durable remissions in MCL.
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Affiliation(s)
- Zainul Hasanali
- Penn State Hershey Cancer Institute, Experimental Therapeutics A - CH74, Room T3319, 500 University Drive, Hershey, PA 17033-0850, USA
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13
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Tzelepi V, Zhang J, Lu JF, Kleb B, Wu G, Wan X, Hoang A, Efstathiou E, Sircar K, Navone NM, Troncoso P, Liang S, Logothetis CJ, Maity SN, Aparicio A. Modeling a lethal prostate cancer variant with small-cell carcinoma features. Clin Cancer Res 2012; 18:666-77. [PMID: 22156612 PMCID: PMC3923417 DOI: 10.1158/1078-0432.ccr-11-1867] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE Small-cell prostate carcinoma (SCPC) morphology predicts for a distinct clinical behavior, resistance to androgen ablation, and frequent but short responses to chemotherapy. We sought to develop model systems that reflect human SCPC and can improve our understanding of its biology. EXPERIMENTAL DESIGN We developed a set of castration-resistant prostate carcinomas xenografts and examined their fidelity to their human tumors of origin. We compared the expression and genomic profiles of SCPC and large-cell neuroendocrine carcinoma (LCNEC) xenografts to those of typical prostate adenocarcinoma xenografts. Results were validated immunohistochemically in a panel of 60 human tumors. RESULTS The reported SCPC and LCNEC xenografts retain high fidelity to their human tumors of origin and are characterized by a marked upregulation of UBE2C and other mitotic genes in the absence of androgen receptor (AR), retinoblastoma (RB1), and cyclin D1 (CCND1) expression. We confirmed these findings in a panel of samples of CRPC patients. In addition, array comparative genomic hybridization of the xenografts showed that the SCPC/LCNEC tumors display more copy number variations than the adenocarcinoma counterparts. Amplification of the UBE2C locus and microdeletions of RB1 were present in a subset, but none displayed AR nor CCND1 deletions. The AR, RB1, and CCND1 promoters showed no CpG methylation in the SCPC xenografts. CONCLUSION Modeling human prostate carcinoma with xenografts allows in-depth and detailed studies of its underlying biology. The detailed clinical annotation of the donor tumors enables associations of anticipated relevance to be made. Future studies in the xenografts will address the functional significance of the findings.
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Affiliation(s)
- Vassiliki Tzelepi
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
- Department of Pathology, University of Patras, Patras, Greece
| | - Jiexin Zhang
- Department of Bioinformatics and Computational Biology, Houston, TX
| | - Jing-Fang Lu
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Brittany Kleb
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Guanglin Wu
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Xinhai Wan
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Anh Hoang
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Eleni Efstathiou
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Kanishka Sircar
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Nora M. Navone
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Patricia Troncoso
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Shoudan Liang
- Department of Bioinformatics and Computational Biology, Houston, TX
| | - Christopher J. Logothetis
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Sankar N. Maity
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
| | - Ana Aparicio
- Department of Genitourinary Medical Oncology, Stanford Alexander Tissue Derivatives Laboratory, David H. Koch Center for Applied Research of Genitourinary Cancers, Houston, TX
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Guo ZY, Hao XH, Tan FF, Pei X, Shang LM, Jiang XL, Yang F. The elements of human cyclin D1 promoter and regulation involved. Clin Epigenetics 2011; 2:63-76. [PMID: 22704330 PMCID: PMC3365593 DOI: 10.1007/s13148-010-0018-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Accepted: 12/07/2010] [Indexed: 02/07/2023] Open
Abstract
Cyclin D1 is a cell cycle machine, a sensor of extracellular signals and plays an important role in G1-S phase progression. The human cyclin D1 promoter contains multiple transcription factor binding sites such as AP-1, NF-қB, E2F, Oct-1, and so on. The extracellular signals functions through the signal transduction pathways converging at the binding sites to active or inhibit the promoter activity and regulate the cell cycle progression. Different signal transduction pathways regulate the promoter at different time to get the correct cell cycle switch. Disorder regulation or special extracellular stimuli can result in cell cycle out of control through the promoter activity regulation. Epigenetic modifications such as DNA methylation and histone acetylation may involved in cyclin D1 transcriptional regulation.
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Affiliation(s)
- Zhi-Yi Guo
- Experimental and Research Center, Hebei United University, № 57 JianShe South Road, TangShan, Hebei 063000 People's Republic of China
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15
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Vela-Chávez T, Adam P, Kremer M, Bink K, Bacon CM, Menon G, Ferry JA, Fend F, Jaffe ES, Quintanilla-Martínez L. Cyclin D1 positive diffuse large B-cell lymphoma is a post-germinal center-type lymphoma without alterations in the CCND1 gene locus. Leuk Lymphoma 2011; 52:458-66. [PMID: 21281227 DOI: 10.3109/10428194.2010.540361] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The aims of this study were to analyze the incidence and morphology of cyclin D1+ DLBCL and cases of Richter transformation (RT), and to elucidate possible molecular mechanisms of cyclin D1 overexpression. Seventy-two cases of de novo DLBCL and 12 cases of RT were included in this study. Cyclin D1 positivity was found in 10/66 (15%) cases of unselected de novo DLBCL and in 2/11 (18%) cases of RT. Seven independently identified cases of cyclin D1+ DLBCL, including one RT, were added to the study. Centroblastic morphology was found in 17/19 (89%) cases of cyclin D1+, most with a post-germinal center phenotype (CD10-, BCL6+, MUM1+). No alterations in the CCND1 gene indicative for a translocation t(11;14) were identified by FISH. Analysis of the MYC locus yielded gene copy alterations in five cases and no disruption of the gene locus in any case, suggesting an alternative mechanism of cyclin D1 deregulation.
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Affiliation(s)
- Teresa Vela-Chávez
- Institute of Pathology, University of Tübingen, Comprehensive Cancer Center, Tübingen, Germany
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16
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Fiancette R, Amin R, Truffinet V, Vincent-Fabert C, Cogné N, Cogné M, Denizot Y. A myeloma translocation-like model associating CCND1 with the immunoglobulin heavy-chain locus 3' enhancers does not promote by itself B-cell malignancies. Leuk Res 2010; 34:1043-51. [PMID: 20018375 DOI: 10.1016/j.leukres.2009.11.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 11/17/2009] [Accepted: 11/21/2009] [Indexed: 12/01/2022]
Abstract
Cyclin D1 overexpression is associated with mantle cell lymphoma and multiple myeloma. In myeloma, it often results from chromosomal translocations linking the CCND1 gene to the 3' part of the IgH locus constant region. This region includes a single and potent transcriptional regulatory region (RR) 3' of the Calpha gene mostly active in mature B-cells. To check whether this RR alone was sufficient to deregulate CCND1, we generated mice carrying a 3'IgH RR-driven human CCND1 transgene and specifically up-regulating cyclin D1 expression in B-cells. In transgenic B-cells, cyclin D1 enforced cell cycle entry in response to various stimuli (LPS, anti-IgM, anti-CD40) but also increased cell death, so that exaggerated proliferation did not result in peripheral lymphocytosis. Despite exaggerated B-cell entry into G(1) phase, malignant lymphoproliferation did not occur either. Crossing of CCND1-3'IgH RR mice with c-myc-3'IgH RR mice did not reveal accelerated tumorigenesis as compared with c-myc-3'IgH RR mice alone. The data presented here demonstrate that the 3'IgH RR-mediated deregulation of CCND1 in mature B-cells cannot by itself trigger the development of lymphomas and strengthen the concept that cyclin D1 per se is not an armful proto-oncogene. Rather its overexpression in several malignancies might be only a stigma of lymphomagenesis or represent a single hit within a multiple hit process.
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Affiliation(s)
- Rémi Fiancette
- UMR CNRS 6101, Centre National de la Recherche Scientifique, Université de Limoges, 2 rue Dr. Marcland, 87025 Limoges, France
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17
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Zhao F, Chen Y, Zeng L, Li R, Zeng R, Wen L, Liu Y, Zhang C. Role of triptolide in cell proliferation, cell cycle arrest, apoptosis and histone methylation in multiple myeloma U266 cells. Eur J Pharmacol 2010; 646:1-11. [PMID: 20547150 DOI: 10.1016/j.ejphar.2010.05.034] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 04/28/2010] [Accepted: 05/25/2010] [Indexed: 10/19/2022]
Abstract
Multiple myeloma is an incurable hematological malignancy. Different studies demonstrated the occurrence of genetic and epigenetic alterations in multiple myeloma. Histone lysine methylation has emerged as a central epigenetic change in the organization of eukaryotic chromatin with far-reaching implications for the regulation of cell proliferation, cell-type differentiation, gene expression, genome stability, overall development, and genesis of cancer. Triptolide is the principal active ingredient in extracts from the Chinese herb Tripterygium wilfordii Hook.F (TwHF), and numerous studies have elucidated its antitumor property. Our experiments discovered that triptolide inhibited the proliferation of multiple myeloma cell line U266 in a time- and dose-dependent manner, induced G2/M cell cycle arrest and caspase-dependent apoptosis. Triptolide could decrease the expression of histone H3K4, H3K27 and H3K36 trimethylation in parallel with histone methyltransferases SMYD3, EZH2 and NSD1 respectively, which possibly was the anti-myeloma mechanism of triptolide.
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Affiliation(s)
- Fei Zhao
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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18
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Genomewide DNA methylation analysis reveals novel targets for drug development in mantle cell lymphoma. Blood 2010; 116:1025-34. [PMID: 20427703 DOI: 10.1182/blood-2009-12-257485] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Mantle cell lymphoma (MCL) is a mostly incurable malignancy arising from naive B cells (NBCs) in the mantle zone of lymph nodes. We analyzed genomewide methylation in MCL patients with the HELP (HpaII tiny fragment Enrichment by Ligation-mediated PCR) assay and found significant aberrancy in promoter methylation patterns compared with normal NBCs. Using biologic and statistical criteria, we further identified 4 hypermethylated genes CDKN2B, MLF-1, PCDH8, and HOXD8 and 4 hypomethylated genes CD37, HDAC1, NOTCH1, and CDK5 when aberrant methylation was associated with inverse changes in mRNA levels. Immunohistochemical analysis of an independent cohort of MCL patient samples confirmed CD37 surface expression in 93% of patients, validating its selection as a target for MCL therapy. Treatment of MCL cell lines with a small modular immunopharmaceutical (CD37-SMIP) resulted in significant loss of viability in cell lines with intense surface CD37 expression. Treatment of MCL cell lines with the DNA methyltransferase inhibitor decitabine resulted in reversal of aberrant hypermethylation and synergized with the histone deacetylase inhibitor suberoylanilide hydroxamic acid in induction of the hypermethylated genes and anti-MCL cytotoxicity. Our data show prominent and aberrant promoter methylation in MCL and suggest that differentially methylated genes can be targeted for therapeutic benefit in MCL.
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19
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Riley RS, Williams D, Ross M, Zhao S, Chesney A, Clark BD, Ben-Ezra JM. Bone marrow aspirate and biopsy: a pathologist's perspective. II. interpretation of the bone marrow aspirate and biopsy. J Clin Lab Anal 2010; 23:259-307. [PMID: 19774631 DOI: 10.1002/jcla.20305] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Bone marrow examination has become increasingly important for the diagnosis and treatment of hematologic and other illnesses. Morphologic evaluation of the bone marrow aspirate and biopsy has recently been supplemented by increasingly sophisticated ancillary assays, including immunocytochemistry, cytogenetic analysis, flow cytometry, and molecular assays. With our rapidly expanding knowledge of the clinical and biologic diversity of leukemia and other hematologic neoplasms, and an increasing variety of therapeutic options, the bone marrow examination has became more critical for therapeutic monitoring and planning optimal therapy. Sensitive molecular techniques, in vitro drug sensitivity testing, and a number of other special assays are available to provide valuable data to assist these endeavors. Fortunately, improvements in bone marrow aspirate and needle technology has made the procurement of adequate specimens more reliable and efficient, while the use of conscious sedation has improved patient comfort. The procurement of bone marrow specimens was reviewed in the first part of this series. This paper specifically addresses the diagnostic interpretation of bone marrow specimens and the use of ancillary techniques.
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Affiliation(s)
- Roger S Riley
- Medical College of Virginia Hospitals of Virginia Commonwealth University, Richmond, Virginia, USA.
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20
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Zhao F, Chen Y, Li R, Liu Y, Wen L, Zhang C. Triptolide alters histone H3K9 and H3K27 methylation state and induces G0/G1 arrest and caspase-dependent apoptosis in multiple myeloma in vitro. Toxicology 2010; 267:70-9. [DOI: 10.1016/j.tox.2009.10.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2009] [Revised: 10/17/2009] [Accepted: 10/19/2009] [Indexed: 12/15/2022]
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21
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Williams ME, Dreyling MH, Kahl BS, Leonard JP, O'connor OA, Press OW, Wilson WH. Mantle cell lymphoma: Report of the 2009 Mantle Cell Lymphoma Consortium Workshop. Leuk Lymphoma 2009; 51:390-8. [DOI: 10.3109/10428190903503453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Abstract
Epigenetic organization represents an important regulation mechanism of gene expression. In this work, we show that the mouse p53 gene is organized into two epigenetic domains. The first domain is fully unmethylated, associated with histone modifications in active genes, and organized in a nucleosome-free conformation that is deficient in H2a/H2b, whereas the second domain is fully methylated, associated with deacetylated histones, and organized in a nucleosomal structure. In mitotic cells, RNA polymerase is depleted in domain II, which is folded into a higher-order structure and is associated with H1 histone, whereas domain I conformation is preserved. Similar results were obtained for cells treated with inhibitors of associated regulatory factors. These results suggest that depletion of RNA polymerase II is the result of a physical barrier due to the folding of chromatin in domain II. The novel chromatin structure in the first domain during mitosis also suggests a mechanism for marking active genes in successive cell cycles.
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23
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Liu H, Huang J, Wang J, Jiang S, Bailey AS, Goldman DC, Welcker M, Bedell V, Slovak ML, Clurman B, Thayer M, Fleming WH, Epner E. Transvection mediated by the translocated cyclin D1 locus in mantle cell lymphoma. ACTA ACUST UNITED AC 2008; 205:1843-58. [PMID: 18625744 PMCID: PMC2525596 DOI: 10.1084/jem.20072102] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In mantle cell lymphoma (MCL) and some cases of multiple myeloma (MM), cyclin D1 expression is deregulated by chromosome translocations involving the immunoglobulin heavy chain (IgH) locus. To evaluate the mechanisms responsible, gene targeting was used to study long-distance gene regulation. Remarkably, these targeted cell lines lost the translocated chromosome (t(11;14)). In these MCL and MM cells, the nonrearranged cyclin D1 (CCND1) locus reverts from CpG hypomethylated to hypermethylated. Reintroduction of the translocated chromosome induced a loss of methylation at the unrearranged CCND1 locus, providing evidence of a transallelic regulatory effect. In these cell lines and primary MCL patient samples, the CCND1 loci are packaged in chromatin-containing CCCTC binding factor (CTCF) and nucleophosmin (NPM) at the nucleolus. We show that CTCF and NPM are bound at the IgH 3′ regulatory elements only in the t(11;14) MCL cell lines. Furthermore, NPM short hairpin RNA produces a specific growth arrest in these cells. Our data demonstrate transvection in human cancer and suggest a functional role for CTCF and NPM.
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Affiliation(s)
- Hui Liu
- Center for Hematologic Malignancies, Oregon Cancer Institute, Portland, OR 97239, USA
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24
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Abstract
There is no consensus treatment for newly diagnosed mantle cell lymphoma. The CHOP + rituximab and hyperCVAD + rituximab regimens are most commonly used. The former is limited by relatively lower rates of complete remission (CR) and frequent relapses. The latter is limited by toxicities, especially in older patients, and relapses that occur later than those usually seen with CHOP + rituximab. Thus, improved therapies are needed. The purine analog cladribine (2-cda) + rituximab has been studied as an alternative frontline regimen in MCL and is quite active with minimal toxicity. Cladribine has epigenetic activity in that it inhibits DNA methylation. Cladribine + rituximab should be further studied in newly diagnosed mantle cell lymphoma in combination with new agents such as inhibitors of histone deacetylation, the mTOR pathway, and the proteasome.
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Affiliation(s)
- Margaret Yu
- Huntsman Cancer Center, Department of Medicine, University of Utah, Salt Lake City, UT, USA
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25
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NIELÄNDER INGA, BUG STEFANIE, RICHTER JULIA, GIEFING MACIEJ, IGNACIO MARTÍN-SUBERO JOSÉ, SIEBERT REINER. Combining array-based approaches for the identification of candidate tumor suppressor loci in mature lymphoid neoplasms. APMIS 2007; 115:1107-34. [DOI: 10.1111/j.1600-0463.2007.apm_883.xml.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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26
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27
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Ford RJ, Shen L, Lin-Lee YC, Pham LV, Multani A, Zhou HJ, Tamayo AT, Zhang C, Hawthorn L, Cowell JK, Ambrus JL. Development of a murine model for blastoid variant mantle-cell lymphoma. Blood 2007; 109:4899-906. [PMID: 17311992 PMCID: PMC1885517 DOI: 10.1182/blood-2006-08-038497] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Accepted: 02/12/2007] [Indexed: 12/20/2022] Open
Abstract
Blastoid-variant mantle-cell lymphoma (MCL-BV), unlike most B-cell non-Hodgkin lymphomas (NHL-Bs), is refractory to conventional chemotherapy and associated with a very poor prognosis. Development of new therapies has been hampered by the lack of valid animal models. We have developed a novel murine model of MCL-BV by crossing interleukin 14alpha (IL-14alpha) transgenic mice with c-Myc transgenic mice (double transgenic [DTG]). IL-14alpha is a B-cell growth factor that is expressed in a number of high-grade lymphomas, including MCL-BV. Ninety-five percent of IL-14alpha transgenic mice develop CD5(+) large B-cell lymphomas by 18 months of age. Sixty percent of c-Myc transgenic mice develop pre-B-cell lymphomas by 12 months of age. Close to 100% of DTG mice develop an aggressive, rapidly fatal lymphoma at 3 to 4 months of age that is CD5(+), CD19(+), CD21(-), CD23(-), sIgM(+). The tumor is found in the blood, bone marrow, liver, spleen, lymph nodes, gastrointestinal tract, and lungs and rarely in the brain, similar to the involvement seen in human MCL-BV. Immunoglobulin gene rearrangements document the monoclonality of the tumor. Cyclin D1 is highly expressed in these tumors, as it is in MCL-BV. DTG represents a novel model for MCL-BV that should reveal important insights into the pathogenesis of the lymphoma and contribute to the development of new forms of therapy.
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Affiliation(s)
- Richard J Ford
- Department of Hematopathology, University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
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28
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Abstract
Alemtuzumab is a humanized monoclonal antibody specific for CD52, a glycosylphosphatidylinositol-anchored, lymphocyte-surface glycoprotein. Administration of alemtuzumab to patients with chronic lymphocytic leukemia depletes normal and neoplastic lymphocytes from the blood, spleen and marrow, but appears to be less effective in resolving lymphadenopathy. Owing to its activity in clearing leukemia cells of patients who are refractory to purine analogs, such as fludarabine, alemtuzumab became the first and only monoclonal antibody approved by the US FDA and other regulatory authorities for the treatment of chronic lymphocytic leukemia. Here we review the results of clinical studies evaluating the activity and safety of alemtuzumab when used alone or in combination with other antileukemia agents for the treatment of this disease.
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MESH Headings
- Alemtuzumab
- Antibodies, Monoclonal/pharmacokinetics
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antibodies, Neoplasm/therapeutic use
- Antineoplastic Agents/pharmacokinetics
- Antineoplastic Agents/therapeutic use
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Clinical Trials as Topic
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/mortality
- Survival Analysis
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Affiliation(s)
- Danelle F James
- University of California, San Diego, Division of Hematology & Oncology, UCSD Moores Cancer Center, Room #4311, 3855 Health Sciences Drive, La Jolla, CA 92093-0820, USA.
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29
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Shi H, Guo J, Duff DJ, Rahmatpanah F, Chitima-Matsiga R, Al-Kuhlani M, Taylor KH, Sjahputera O, Andreski M, Wooldridge JE, Caldwell CW. Discovery of novel epigenetic markers in non-Hodgkin's lymphoma. Carcinogenesis 2006; 28:60-70. [PMID: 16774933 DOI: 10.1093/carcin/bgl092] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Non-Hodgkin's lymphoma (NHL) is a group of malignancies with heterogeneous genetic and epigenetic alterations. Discovery of molecular markers that better define NHL should improve diagnosis, prognosis and understanding of the biology. We developed a CpG island DNA microarray for discovery of aberrant methylation targets in cancer, and now apply this method to examine NHL cell lines and primary tumors. This methylation profiling revealed differential patterns in six cell lines originating from different subtypes of NHL. We identified 30 hypermethylated genes in these cell lines and independently confirmed 10 of them. Methylation of 6 of these genes was then further examined in 75 primary NHL specimens composed of four subtypes representing different stages of maturation. Each gene (DLC-1, PCDHGB7, CYP27B1, EFNA5, CCND1 and RARbeta2) was frequently hypermethylated in these NHLs (87, 78, 61, 53, 40 and 38%, respectively), but not in benign follicular hyperplasia. Although some genes such as DLC-1 and PCDHGB7 were methylated in the vast majority of NHLs, others were differentially methylated in specific subtypes. The methylation of the candidate tumor suppressor gene DLC-1 was detected in a high proportion of primary tumor and plasma DNA samples by using quantitative methylation-specific PCR analysis. This promoter hypermethylation inversely correlated with DLC-1 gene expression in primary NHL samples. Thus, this CpG island microarray is a powerful discovery tool to identify novel methylated genes for further studies of their relevant molecular pathways in NHLs and identification of potential epigenetic biomarkers of disease.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Blotting, Western
- CpG Islands
- DNA Methylation
- Epigenesis, Genetic
- GTPase-Activating Proteins
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic
- Genome, Human
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/metabolism
- Lymphoma, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Non-Hodgkin/genetics
- Lymphoma, Non-Hodgkin/metabolism
- Lymphoma, Non-Hodgkin/pathology
- Microarray Analysis
- Middle Aged
- Promoter Regions, Genetic
- Reverse Transcriptase Polymerase Chain Reaction
- Tumor Suppressor Proteins/genetics
- Tumor Suppressor Proteins/metabolism
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Affiliation(s)
- Huidong Shi
- Department of Pathology and Anatomical Sciences, Ellis Fischel Cancer Center, University of Missouri School of Medicine, Columbia, MO 65203, USA
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30
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Krieger S, Grunau C, Sabbah M, Sola B. Cyclin D1 gene activation in human myeloma cells is independent of DNA hypomethylation or histone hyperacetylation. Exp Hematol 2005; 33:652-9. [PMID: 15911089 DOI: 10.1016/j.exphem.2005.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2004] [Revised: 02/24/2005] [Accepted: 03/18/2005] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Overexpression of cyclin D1 is a common event in solid and hematological cancers. In multiple myeloma (MM), a B-cell hemopathy, one mechanism responsible for cyclin D1 expression is the translocation t(11;14)(q13;q32). But this translocation does not account for cyclin D1 gene activation in all MM. We have hypothesized that epigenetic events could regulate cyclin D1 gene transcription. METHODS Using 6 MM cell lines representative of different cyclin D1 expression levels and exhibiting various chromosome 11 abnormalities, as well as normal B cells, we studied DNA methylation and histone acetylation of the cyclin D1 promoter. RESULTS With the bisulfite sequencing technique, we have studied the DNA methylation status of the core minimal cyclin D1 promoter containing Sp1- and CRE-binding sites. Our results show that this region is not methylated in 6 human MM cell lines as well as in normal B lymphocytes, independently of cyclin D1 expression. Treatment with the DNA methyltransferase inhibitor 5-aza-deoxycytidine (5-Aza) had no effect on cyclin D1 gene transcription. Chromatin immunoprecipitation (ChIP) experiments indicated that acetylated histones H4 are located at both the active and inactive cyclin D1 promoter. Treatment with a histone deacetylase inhibitor, trichostatin A (TSA), had no effect on gene transcription, nor had combined TSA plus 5-Aza treatment. CONCLUSION The cyclin D1 gene is silenced within the B lineage by a mechanism different from DNA methylation or histone deacetylation.
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Affiliation(s)
- Sophie Krieger
- Biologie moléculaire et cellulaire de la signalisation, UFR de médecine, Université de Caen, CHU Côte de Nacre, Caen Cedex, France
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31
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Lacrima K, Valentini A, Lambertini C, Taborelli M, Rinaldi A, Zucca E, Catapano C, Cavalli F, Gianella-Borradori A, Maccallum DE, Bertoni F. In vitro activity of cyclin-dependent kinase inhibitor CYC202 (Seliciclib, R-roscovitine) in mantle cell lymphomas. Ann Oncol 2005; 16:1169-76. [PMID: 15851403 DOI: 10.1093/annonc/mdi217] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Mantle cell lymphoma (MCL) has the worst prognosis of all B-cell lymphomas and has poor response to conventional therapy. It is characterized by the presence of a chromosomal translocation t(11:14) (q13;q32) which results in deregulated cyclin D1 expression. Since defects in cell cycle regulation and apoptosis are primary events in MCL, small-molecule inhibitors of cdks-cyclins may play an important role in the therapy of this disorder. CYC202 (Seliciclib, R-roscovitine; Cyclacel Ltd., Dundee, UK) is a purine analogue and a selective inhibitor of the cdk2-cyclin E as well as cdk7-cyclin H and cdk9-cyclin T. MATERIALS AND METHODS The activity of CYC202 was tested in four human MCL cell lines: REC, Granta-519, JeKo-1 and NCEB-1. The effect of CYC202 on the cell cycle and on apoptosis-, cell-cycle- and transcription-regulation-related proteins was assessed. RESULTS The IC50 was 25 microM for REC, Granta-519 and JeKo-1 cells and 50 microM for NCEB-1 cells. CYC202 caused an accumulation of cells in the G2-M phase of the cell cycle and apoptosis. CYC202 caused down-regulation of cyclin D1 and Mcl-1 protein levels, possibly because of the inhibition of transcription elongation. CONCLUSIONS Our data suggest that CYC202 is an active agent in MCL. The concomitant decrease of the phosphorylated and total forms of RNA polymerase II suggests that this could be the main mechanism mediating the biological effects of CYC202 in MCL cells. The drug might represent a new therapeutic agent in this lymphoma subtype.
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Affiliation(s)
- K Lacrima
- Experimental Oncology and Lymphoma Unit, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
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32
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Wang J, Liu H, Lin CM, Aladjem MI, Epner EM. Targeted deletion of the chicken beta-globin regulatory elements reveals a cooperative gene silencing activity. J Biol Chem 2005; 280:23340-8. [PMID: 15824098 DOI: 10.1074/jbc.m501161200] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The chicken beta-globin locus represents a well characterized system to study the role of both proximal and distal regulatory elements in a eukaryotic multigene domain. The function of the chicken beta(A)/epsilon-intergenic enhancer and upstream regulatory elements 5'-HS1 and 5'-HS2 were studied using a gene targeting approach in chicken DT40 cells followed by microcell-mediated chromosome transfer into human erythroleukemia cells (K562). These regulatory elements all repressed expression of the rho- and beta(H)-chicken globin genes in the chromosome transfer assay. No rho- or beta(H)-globin gene expression was detected in K562 cells containing the chicken chromosome without deletions, whereas rho- and beta(H)-mRNA was activated in K562 cells containing chicken chromosomes with deletions of the intergenic enhancers, 5'-HS1 and 5'-HS2. Transcriptional activation of the rho- and beta(H)-globin genes correlated with hyperacetylation of histones H3 and H4, loss of histone H3 lysine 9 methylation, and binding of RNA polymerase II to the gene promoters. Surprisingly, the status of CpG dinucleotide methylation at the promoters did not correlate with the transcriptional status of the genes. Our results using a chromosomal transfer assay demonstrate an identical silencing function for these regulatory elements, which suggests they function as part of a common silencing pathway or complex.
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Affiliation(s)
- Jin Wang
- Center for Hematologic Malignancies, Oregon Cancer Institute, Department of Medicine, Oregon Health and Science University, Portland, 97239, USA
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