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Anti-Inflammatory Activities of an Anti-Histamine Drug, Loratadine, by Suppressing TAK1 in AP-1 Pathway. Int J Mol Sci 2022; 23:ijms23073986. [PMID: 35409346 PMCID: PMC8999734 DOI: 10.3390/ijms23073986] [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: 01/24/2022] [Revised: 04/01/2022] [Accepted: 04/01/2022] [Indexed: 02/05/2023] Open
Abstract
Loratadine is an anti-histamine routinely used for treating allergies. However, recent findings have shown that Loratadine may also have anti-inflammatory functions, while their exact mechanisms have not yet been fully uncovered. In this paper, we investigated whether Loratadine can be utilized as an anti-inflammatory drug through a series of in vitro and in vivo experiments using a murine macrophage cell line and an acute gastritis mouse model. Loratadine was found to dramatically reduce the expression of pro-inflammatory genes, including MMP1, MMP3, and MMP9, and inhibit AP-1 transcriptional activation, as demonstrated by the luciferase assay. Therefore, we decided to further explore its role in the AP-1 signaling pathway. The expression of c-Jun and c-Fos, AP-1 subunits, was repressed by Loratadine and, correspondingly, the expression of p-JNK, p-MKK7, and p-TAK1 was also inhibited. In addition, Loratadine was able to reduce gastric bleeding in acute gastritis-induced mice; Western blotting using the stomach samples showed reduced p-c-Fos protein levels. Loratadine was shown to effectively suppress inflammation by specifically targeting TAK1 and suppressing consequent AP-1 signaling pathway activation and inflammatory cytokine production.
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Dey D, Hasan MM, Biswas P, Papadakos SP, Rayan RA, Tasnim S, Bilal M, Islam MJ, Arshe FA, Arshad EM, Farzana M, Rahaman TI, Baral SK, Paul P, Bibi S, Rahman MA, Kim B. Investigating the Anticancer Potential of Salvicine as a Modulator of Topoisomerase II and ROS Signaling Cascade. Front Oncol 2022; 12:899009. [PMID: 35719997 PMCID: PMC9198638 DOI: 10.3389/fonc.2022.899009] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/02/2022] [Indexed: 12/14/2022] Open
Abstract
Salvicine is a new diterpenoid quinone substance from a natural source, specifically in a Chinese herb. It has powerful growth-controlling abilities against a broad range of human cancer cells in both in vitro and in vivo environments. A significant inhibitory effect of salvicine on multidrug-resistant (MDR) cells has also been discovered. Several research studies have examined the activities of salvicine on topoisomerase II (Topo II) by inducing reactive oxygen species (ROS) signaling. As opposed to the well-known Topo II toxin etoposide, salvicine mostly decreases the catalytic activity with a negligible DNA breakage effect, as revealed by several enzymatic experiments. Interestingly, salvicine dramatically reduces lung metastatic formation in the MDA-MB-435 orthotopic lung cancer cell line. Recent investigations have established that salvicine is a new non-intercalative Topo II toxin by interacting with the ATPase domains, increasing DNA-Topo II interaction, and suppressing DNA relegation and ATP hydrolysis. In addition, investigations have revealed that salvicine-induced ROS play a critical role in the anticancer-mediated signaling pathway, involving Topo II suppression, DNA damage, overcoming multidrug resistance, and tumor cell adhesion suppression, among other things. In the current study, we demonstrate the role of salvicine in regulating the ROS signaling pathway and the DNA damage response (DDR) in suppressing the progression of cancer cells. We depict the mechanism of action of salvicine in suppressing the DNA-Topo II complex through ROS induction along with a brief discussion of the anticancer perspective of salvicine.
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Affiliation(s)
- Dipta Dey
- Biochemistry and Molecular Biology department, Life Science Faculty, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalgonj, Bangladesh
| | - Mohammad Mehedi Hasan
- Department of Biochemistry and Molecular Biology, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh
| | - Partha Biswas
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University of Science and Technology (JUST), Jashore, Bangladesh
- ABEx Bio-Research Center, East Azampur, Dhaka, Bangladesh
| | - Stavros P. Papadakos
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | - Rehab A. Rayan
- Department of Epidemiology, High Institute of Public Health, Alexandria University, Alexandria, Egypt
| | - Sabiha Tasnim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka, Bangladesh
| | - Muhammad Bilal
- College of Pharmacy, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Mohammod Johirul Islam
- Department of Biochemistry and Molecular Biology, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh
| | - Farzana Alam Arshe
- Department of Biochemistry and Microbiology, North South University, Dhaka, Bangladesh
| | - Efat Muhammad Arshad
- Department of Biochemistry and Microbiology, North South University, Dhaka, Bangladesh
| | - Maisha Farzana
- College of Medical, Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, United Kingdom
| | - Tanjim Ishraq Rahaman
- Department of Biotechnology and Genetic Engineering, Faculty of Life Science, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, Bangladesh
| | | | - Priyanka Paul
- Biochemistry and Molecular Biology department, Life Science Faculty, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalgonj, Bangladesh
| | - Shabana Bibi
- Yunnan Herbal Laboratory, College of Ecology and Environmental Sciences, Yunnan University, Kunming, China
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Md. Ataur Rahman
- Global Biotechnology & Biomedical Research Network (GBBRN), Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Islamic University, Kushtia, Bangladesh
- Department of Pathology, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- *Correspondence: Md. Ataur Rahman, ; Bonglee Kim,
| | - Bonglee Kim
- Department of Pathology, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, South Korea
- *Correspondence: Md. Ataur Rahman, ; Bonglee Kim,
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3
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Marotta P, Salatiello F, Ambrosino L, Berruto F, Chiusano ML, Locascio A. The Ascidia Ciona robusta Provides Novel Insights on the Evolution of the AP-1 Transcriptional Complex. Front Cell Dev Biol 2021; 9:709696. [PMID: 34414189 PMCID: PMC8369891 DOI: 10.3389/fcell.2021.709696] [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: 05/14/2021] [Accepted: 07/12/2021] [Indexed: 11/13/2022] Open
Abstract
The Activator Protein-1 transcription factor family (AP-1) transcriptional complex is historically defined as an early response group of transcription factors formed by dimeric complexes of the Jun, Fos, Atf, and Maf bZIP proteins that control cell proliferation and differentiation by regulating gene expression. It has been greatly investigated in many model organisms across metazoan evolution. Nevertheless, its complexity and variability of action made its multiple functions difficult to be defined. Here, we place the foundations for understanding the complexity of AP-1 transcriptional members in tunicates. We investigated the gene members of this family in the ascidian Ciona robusta and identified single copies of Jun, Fos, Atf3, Atf2/7, and Maf bZIP-related factors that could have a role in the formation of the AP-1 complex. We highlight that mesenchyme is a common cellular population where all these factors are expressed during embryonic development, and that, moreover, Fos shows a wider pattern of expression including also notochord and neural cells. By ectopic expression in transgenic embryos of Jun and Fos genes alone or in combination, we investigated the phenotypic alterations induced by these factors and highlighted a degree of functional conservation of the AP-1 complex between Ciona and vertebrates. The lack of gene redundancy and the first pieces of evidence of conserved functions in the control of cell movements and structural organization exerted by these factors open the way for using Ciona as a helpful model system to uncover the multiple potentialities of this highly complex family of bZIP transcription factors.
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Affiliation(s)
- Pina Marotta
- Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Naples, Italy.,Stazione Zoologica Anton Dohrn, Department of Research Infrastructures for Marine Biological Resources, Naples, Italy
| | - Federica Salatiello
- Stazione Zoologica Anton Dohrn, Department of Biology and Evolution of Marine Organisms, Naples, Italy
| | - Luca Ambrosino
- Stazione Zoologica Anton Dohrn, Department of Research Infrastructures for Marine Biological Resources, Naples, Italy
| | - Federica Berruto
- Stazione Zoologica Anton Dohrn, Department of Biology and Evolution of Marine Organisms, Naples, Italy
| | - Maria Luisa Chiusano
- Stazione Zoologica Anton Dohrn, Department of Research Infrastructures for Marine Biological Resources, Naples, Italy.,Department of Agriculture, Università degli Studi di Napoli Federico II, Portici, Italy
| | - Annamaria Locascio
- Stazione Zoologica Anton Dohrn, Department of Biology and Evolution of Marine Organisms, Naples, Italy
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Leylek R, Alcántara-Hernández M, Granja JM, Chavez M, Perez K, Diaz OR, Li R, Satpathy AT, Chang HY, Idoyaga J. Chromatin Landscape Underpinning Human Dendritic Cell Heterogeneity. Cell Rep 2021; 32:108180. [PMID: 32966789 PMCID: PMC7546547 DOI: 10.1016/j.celrep.2020.108180] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 06/18/2020] [Accepted: 09/01/2020] [Indexed: 12/16/2022] Open
Abstract
Human dendritic cells (DCs) comprise subsets with distinct phenotypic and functional characteristics, but the transcriptional programs that dictate their identity remain elusive. Here, we analyze global chromatin accessibility profiles across resting and stimulated human DC subsets by means of the assay for transposase-accessible chromatin using sequencing (ATAC-seq). We uncover specific regions of chromatin accessibility for each subset and transcriptional regulators of DC function. By comparing plasmacytoid DC responses to IFN-I-producing and non-IFN-I-producing conditions, we identify genetic programs related to their function. Finally, by intersecting chromatin accessibility with genome-wide association studies, we recognize DC subset-specific enrichment of heritability in autoimmune diseases. Our results unravel the basis of human DC subset heterogeneity and provide a framework for their analysis in disease pathogenesis. Human dendritic cells (DCs) orchestrate immune responses by a division of labor between functionally specialized subsets; however, the transcriptional basis of this heterogeneity is poorly understood. Using ATAC-seq, Leylek et al. profile the chromatin landscape of human DC subsets, providing insight into the underlying regulatory mechanisms that modulate their function.
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Affiliation(s)
- Rebecca Leylek
- Department of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA; Immunology Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Marcela Alcántara-Hernández
- Department of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA; Immunology Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jeffrey M Granja
- Biophysics Program, Stanford University School of Medicine, Stanford, CA 94305, USA; Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michael Chavez
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Kimberly Perez
- Department of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA; Immunology Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Oscar R Diaz
- Department of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Rui Li
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ansuman T Satpathy
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Howard Y Chang
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Juliana Idoyaga
- Department of Microbiology & Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA; Immunology Program, Stanford University School of Medicine, Stanford, CA 94305, USA.
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Liu C, Li S, Li Y, Tian J, Sun X, Song T, Yan G, Ding L, Sun H. Growth hormone ameliorates the age-associated depletion of ovarian reserve and decline of oocyte quality via inhibiting the activation of Fos and Jun signaling. Aging (Albany NY) 2021; 13:6765-6781. [PMID: 33621201 PMCID: PMC7993724 DOI: 10.18632/aging.202534] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 12/12/2020] [Indexed: 01/03/2023]
Abstract
Oocyte quality typically begins to decline with aging, which contributes to subfertility and infertility. However, there is still no effective treatment to restore the ovarian reserve and improve aged-oocyte quality. According to the present study, growth hormone (GH) secretion changes with maternal age in female mice. After intraperitoneal injection with GH (1 mg/kg body weight) every two days for two months, the 10-month-old mice showed a better ovarian reserve and oocyte quality than control mice. GH treatment decreased the occurrence rate of aneuploidy caused by spindle/chromosome defects. Additionally, the single oocyte transcriptome analysis indicated that GH decreased the expression of apoptosis-related genes in oocytes. It was also observed that GH treatment reduced the expression of γH2AX and apoptosis of aged oocytes via decreasing the activation of Fos and Jun. Collectively, our results indicate that GH treatment is an effective way to reverse the age-associated depletion of ovarian reserve and the decline of oocyte quality by decreasing apoptosis.
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Affiliation(s)
- Chuanming Liu
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Shiyuan Li
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Yifan Li
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Jiao Tian
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Xiaoling Sun
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Tianran Song
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Guijun Yan
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Lijun Ding
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
- Center for Clinical Stem Cell Reasearch, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
| | - Haixiang Sun
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, People’s Republic of China
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Wasiak S, Dzobo KE, Rakai BD, Kaiser Y, Versloot M, Bahjat M, Stotz SC, Fu L, Sweeney M, Johansson JO, Wong NCW, Stroes ESG, Kroon J, Kulikowski E. BET protein inhibitor apabetalone (RVX-208) suppresses pro-inflammatory hyper-activation of monocytes from patients with cardiovascular disease and type 2 diabetes. Clin Epigenetics 2020; 12:166. [PMID: 33172487 PMCID: PMC7657365 DOI: 10.1186/s13148-020-00943-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 10/07/2020] [Indexed: 12/14/2022] Open
Abstract
Background Patients with cardiovascular disease (CVD) and type 2 diabetes (DM2) have a high residual risk for experiencing a major adverse cardiac event. Dysregulation of epigenetic mechanisms of gene transcription in innate immune cells contributes to CVD development but is currently not targeted by therapies. Apabetalone (RVX-208) is a small molecule inhibitor of bromodomain and extra-terminal (BET) proteins—histone acetylation readers that drive pro-inflammatory and pro-atherosclerotic gene transcription. Here, we assess the impact of apabetalone on ex vivo inflammatory responses of monocytes from DM2 + CVD patients. Results Monocytes isolated from DM2 + CVD patients and matched controls were treated ex vivo with apabetalone, interferon γ (IFNγ), IFNγ + apabetalone or vehicle and phenotyped for gene expression and protein secretion. Unstimulated DM2 + CVD monocytes had higher baseline IL-1α, IL-1β and IL-8 cytokine gene expression and Toll-like receptor (TLR) 2 surface abundance than control monocytes, indicating pro-inflammatory activation. Further, DM2 + CVD monocytes were hyper-responsive to stimulation with IFNγ, upregulating genes within cytokine and NF-κB pathways > 30% more than control monocytes (p < 0.05). Ex vivo apabetalone treatment countered cytokine secretion by DM2 + CVD monocytes at baseline (GROα and IL-8) and during IFNγ stimulation (IL-1β and TNFα). Apabetalone abolished pro-inflammatory hyper-activation by reducing TLR and cytokine gene signatures more robustly in DM2 + CVD versus control monocytes. Conclusions Monocytes isolated from DM2 + CVD patients receiving standard of care therapies are in a hyper-inflammatory state and hyperactive upon IFNγ stimulation. Apabetalone treatment diminishes this pro-inflammatory phenotype, providing mechanistic insight into how BET protein inhibition may reduce CVD risk in DM2 patients.
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Affiliation(s)
- Sylwia Wasiak
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Kim E Dzobo
- Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Brooke D Rakai
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Yannick Kaiser
- Department of Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Miranda Versloot
- Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Mahnoush Bahjat
- Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Stephanie C Stotz
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Li Fu
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Michael Sweeney
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Jan O Johansson
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Norman C W Wong
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada
| | - Erik S G Stroes
- Department of Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Jeffrey Kroon
- Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Ewelina Kulikowski
- Resverlogix Corp, 300-4820 Richard Road SW, Calgary, AB, T3E 6L1, Canada.
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Zhou J, Quah JY, Ng Y, Chooi JY, Toh SHM, Lin B, Tan TZ, Hosoi H, Osato M, Seet Q, Ooi AL, Lindmark B, McHale M, Chng WJ. ASLAN003, a potent dihydroorotate dehydrogenase inhibitor for differentiation of acute myeloid leukemia. Haematologica 2020; 105:2286-2297. [PMID: 33054053 PMCID: PMC7556493 DOI: 10.3324/haematol.2019.230482] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 11/05/2019] [Indexed: 11/09/2022] Open
Abstract
Differentiation therapies achieve remarkable success in acute promyelocytic leukemia, a subtype of acute myeloid leukemia. However, excluding acute promyelocytic leukemia, clinical benefits of differentiation therapies are negligible in acute myeloid leukemia except for mutant isocitrate dehydrogenase 1/2. Dihydroorotate dehydrogenase catalyses the fourth step of the de novo pyrimidine synthesis pathway. ASLAN003 is a highly potent dihydroorotate dehydrogenase inhibitor that induces differentiation, as well as reduces cell proliferation and viability, of acute myeloid leukemia cell lines and primary acute myeloid leukemia blasts including in chemo-resistant cells. Apoptotic pathways are triggered by ASLAN003, and it also significantly inhibits protein synthesis and activates AP-1 transcription, contributing to its differentiation promoting capacity. Finally, ASLAN003 substantially reduces leukemic burden and prolongs survival in acute myeloid leukemia xenograft mice and acute myeloid leukemia patient-derived xenograft models. Notably, the drug has no evident effect on normal hematopoietic cells and exhibits excellent safety profiles in mice, even after a prolonged period of administration. Our results, therefore, suggest that ASLAN003 is an agent targeting dihydroorotate dehydrogenase with potential in the treatment of acute myeloid leukemia. ASLAN003 is currently being evaluated in phase 2a clinical trial in acute myeloid leukemia patients.
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Affiliation(s)
- Jianbiao Zhou
- Cancer Science Institute of Singapore, National University of Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore
| | | | - Yvonne Ng
- Cancer Science Institute of Singapore, National University of Singapore
| | - Jing-Yuan Chooi
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore
| | | | - Baohong Lin
- Department of Hematology-Oncology, National University Cancer Institute, NUHS
| | - Tuan Zea Tan
- Cancer Science Institute of Singapore, National University of Singapore
| | - Hiroki Hosoi
- Cancer Science Institute of Singapore, National University of Singapore
| | - Motomi Osato
- Cancer Science Institute of Singapore, National University of Singapore
- Department of Pediatrics, National University of Singapore, Yong Loo Lin School of Medicine
| | | | | | | | | | - Wee-Joo Chng
- Cancer Science Institute of Singapore, National University of Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore
- Department of Hematology-Oncology, National University Cancer Institute, NUHS
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8
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Mao F, Wong NK, Lin Y, Zhang X, Liu K, Huang M, Xu D, Xiang Z, Li J, Zhang Y, Yu Z. Transcriptomic Evidence Reveals the Molecular Basis for Functional Differentiation of Hemocytes in a Marine Invertebrate, Crassostrea gigas. Front Immunol 2020; 11:911. [PMID: 32536915 PMCID: PMC7269103 DOI: 10.3389/fimmu.2020.00911] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 04/20/2020] [Indexed: 12/24/2022] Open
Abstract
Hemocytes play unequivocally central roles in host immune defense of bivalve mollusks, though the exact mechanisms underlying their functional differentiation are only partially understood. To this end, granulocytes and hyalinocytes were sorted via flow cytometry from hemocytes of the Pacific oyster Crassostrea gigas, and consequently quantitative transcriptomic analysis revealed a striking array of differentially expressed genes (DEGs), which were globally upregulated in granulocytes, dedicating to functional differentiation among oyster hemocytes. Our network of DEGs illustrated actively engaged signaling pathways, with Cdc42/Cdc42l being a core regulator of pathway network, which was validated by a dramatically reduced capacity for hemocyte phagocytosis in the presence of Cdc42 inhibitors. Additionally, a number of transcription factors were identified among DEGs, including ELK, HELT, and Fos, which were predominantly expressed in granulocytes. The AP-1 transcription factor Fos was confirmed to facilitate functional differentiation of hemocytes in an assay on binding to target genes by the AP-1 binding site, consistent with downstream phagocytosis and ROS production. Importantly, Cdc42/Cdc42l were also regulated by the expression of Fos, providing a possible regulatory mechanism-guided hemocyte functional differentiation. Findings in this study have bridged a knowledge gap on the mechanistic underpinnings of functional differentiation of hemocytes in a marine invertebrate C. gigas, which promise to facilitate research on the evolution of immune defense and functional differentiation of phagocyte in higher-order and more recent phyla.
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Affiliation(s)
- Fan Mao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Nai-Kei Wong
- Department of Infectious Diseases, Shenzhen Third People's Hospital, The Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, China
| | - Yue Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Xiangyu Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Kunna Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Minwei Huang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Duo Xu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Zhiming Xiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Jun Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Yang Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Ziniu Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
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Uras IZ, Sexl V, Kollmann K. CDK6 Inhibition: A Novel Approach in AML Management. Int J Mol Sci 2020; 21:ijms21072528. [PMID: 32260549 PMCID: PMC7178035 DOI: 10.3390/ijms21072528] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 02/01/2023] Open
Abstract
Acute myeloid leukemia (AML) is a complex disease with an aggressive clinical course and high mortality rate. The standard of care for patients has only changed minimally over the past 40 years. However, potentially useful agents have moved from bench to bedside with the potential to revolutionize therapeutic strategies. As such, cell-cycle inhibitors have been discussed as alternative treatment options for AML. In this review, we focus on cyclin-dependent kinase 6 (CDK6) emerging as a key molecule with distinct functions in different subsets of AML. CDK6 exerts its effects in a kinase-dependent and -independent manner which is of clinical significance as current inhibitors only target the enzymatic activity.
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Affiliation(s)
- Iris Z. Uras
- Department of Pharmacology, Center of Physiology and Pharmacology & Comprehensive Cancer Center (CCC), Medical University of Vienna, 1090 Vienna, Austria;
| | - Veronika Sexl
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine, 1210 Vienna, Austria;
| | - Karoline Kollmann
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine, 1210 Vienna, Austria;
- Correspondence: ; Tel.: + 43-1-25077-2917
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10
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Li S, Ali S, Duan X, Liu S, Du J, Liu C, Dai H, Zhou M, Zhou L, Yang L, Chu P, Li L, Bhatia R, Schones DE, Wu X, Xu H, Hua Y, Guo Z, Yang Y, Zheng L, Shen B. JMJD1B Demethylates H4R3me2s and H3K9me2 to Facilitate Gene Expression for Development of Hematopoietic Stem and Progenitor Cells. Cell Rep 2019; 23:389-403. [PMID: 29641999 PMCID: PMC5933860 DOI: 10.1016/j.celrep.2018.03.051] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 01/23/2018] [Accepted: 03/13/2018] [Indexed: 12/23/2022] Open
Abstract
The arginine methylation status of histones dynamically changes during many cellular processes, including hematopoietic stem/progenitor cell (HSPC) development. The arginine methyltransferases and the readers that transduce the histone codes have been defined. However, whether arginine demethylation actively occurs in cells and what enzyme demethylates the methylarginine residues during various cellular processes are unknown. We report that JMJD1B, previously identified as a lysine demethylase for H3K9me2, mediates arginine demethylation of H4R3me2s and its intermediate, H4R3me1. We show that demethylation of H4R3me2s and H3K9me2s in promoter regions is correlated with active gene expression. Furthermore, knockout of JMJD1B blocks demethylation of H4R3me2s and/or H3K9me2 at distinct clusters of genes and impairs the activation of genes important for HSPC differentiation and development. Consequently, JMJD1B−/− mice show defects in hematopoiesis. Altogether, our study demonstrates that demethylase-mediated active arginine demethylation process exists in eukaryotes and that JMJD1B demethylates both H4R3me2s and H3K9me2 for epigenetic programming during hematopoiesis.
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Affiliation(s)
- Sihui Li
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China; Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Shafat Ali
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Xiaotao Duan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Songbai Liu
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Juan Du
- Department of Diabetes Complications & Metabolism, Beckman Research Institute, City of Hope, Duarte, CA, USA; Department of Molecular and Cellular Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Changwei Liu
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Huifang Dai
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Mian Zhou
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Lina Zhou
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China; Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Lu Yang
- Department of Molecular and Cellular Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Peiguo Chu
- Department of Pathology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Ling Li
- Department of Hematologic Malignancy Translational Science, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Ravi Bhatia
- Department of Hematologic Malignancy Translational Science, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Dustin E Schones
- Department of Diabetes Complications & Metabolism, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Xiwei Wu
- Department of Molecular and Cellular Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Hong Xu
- Colleges of Life Sciences and Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yuejin Hua
- Colleges of Life Sciences and Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhigang Guo
- College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Yanzhong Yang
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Li Zheng
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA.
| | - Binghui Shen
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope, Duarte, CA, USA.
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11
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Protective Effect of Ginsenoside Rg1 on Oxidative Damage Induced by Hydrogen Peroxide in Chicken Splenic Lymphocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:8465030. [PMID: 31178974 PMCID: PMC6501224 DOI: 10.1155/2019/8465030] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/04/2019] [Indexed: 12/28/2022]
Abstract
Previous investigation showed that ginsenoside Rg1 (Rg1) extracted from Panax ginseng C.A. Mey has antioxidative effect on oxidative stress in chickens. The present study was designed to investigate the protective effects of Rg1 on chicken lymphocytes against hydrogen peroxide-induced oxidative stress and the potential mechanisms. Cell viability, apoptotic cells, malondialdehyde, activity of superoxide dismutase, mitochondrial membrane potential, and [Ca2+]i concentration were measured, and transcriptome analysis and quantitative real-time polymerase chain reaction were used to investigate the effect of Rg1 on gene expression of the cells. The results showed that treatment of lymphocytes with H2O2 induced oxidative stress and apoptosis. However, pretreatment of the cells with Rg1 dramatically enhanced cell viability, reduced apoptotic cells, and decreased oxidative stress induced by H2O2. In addition, Rg1 reduced these H2O2-dependent decreases in mitochondrial membrane potential and reversed [Ca2+]i overload. Transcriptome analysis showed that 323 genes were downregulated and 105 genes were upregulated in Rg1-treated cells. The differentially expressed genes were involved in Toll-like receptors, peroxisome proliferator-activated receptor signaling pathway, and cytokine-cytokine receptor interaction. The present study indicated that Rg1 may act as an antioxidative agent to protect cell damage caused by oxidative stress via regulating expression of genes such as RELT, EDA2R, and TLR4.
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12
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Gao S, Jiang H, Sun J, Diao Y, Tang Y, Hu J. Integrated Analysis of miRNA and mRNA Expression Profiles in Spleen of Specific Pathogen-Free Chicken Infected with Avian Reticuloendotheliosis Virus Strain SNV. Int J Mol Sci 2019; 20:ijms20051041. [PMID: 30818863 PMCID: PMC6429403 DOI: 10.3390/ijms20051041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/15/2019] [Accepted: 02/23/2019] [Indexed: 01/06/2023] Open
Abstract
The Reticuloendotheliosis virus (REV) primarily causes avian severe immunosuppression, in addition to other symptoms, which include avian dwarfing syndrome and chronic tumors in lymphoid and other tissue. To date, REV’s molecular mechanisms leading to immunosuppression have not been fully elucidated. In the current study, we aimed to elucidate the role of microRNAs (miRNA) in regulating gene expression during REV infections. Therefore, we used a high-dose spleen necrosis virus (SNV) model of REV to inoculate one-day-old specific pathogen-free (SPF) chickens, thereby inducing congenital infections. We analyzed miRNA and mRNA expression profiles using Next Generation Sequencing (NGS) in a total of 19 spleen samples that were collected at 7, 14, and 21 days post infection (dpi). The results showed that 63 differentially expressed miRNAs (DEmiRNAs) (30 known miRNAs and 33 novel miRNAs) and 482 differentially expressed target genes (DETGs) were identified. Integration analysis identified 886 known miRNA–mRNA and 580 novel miRNA–mRNA interaction pairs, which involved miRNAs that were inversely correlated with the above DETGs. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis revealed that the DETGs were considerably enriched in the immune-relevant pathways category, such as immune system, cell growth and death, signaling molecules and interaction, signal transduction, etc. We further verified selected immune-relevant miRNA and their DETGs while using quantitative RT-PCR (qRT-PCR). Overall, our data revealed valuable immune-related miRNA–mRNA interaction information that occurred during REV infections, thereby broadening our understanding of the REV-induced immunosuppression.
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Affiliation(s)
- Shuo Gao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
| | - Hao Jiang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
| | - Jie Sun
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
| | - Youxiang Diao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
| | - Yi Tang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Correspondence: (Y.T.); (J.H.); Tel.: +86-13127277623 (Y.T.); +86-15949803926 (J.H.)
| | - Jingdong Hu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China; (S.G.); (H.J.); (J.S.); (Y.D.)
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No. 61 Daizong Street, Tai’an 271018, Shandong, China
- Correspondence: (Y.T.); (J.H.); Tel.: +86-13127277623 (Y.T.); +86-15949803926 (J.H.)
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13
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CDK6 coordinates JAK2 V617F mutant MPN via NF-κB and apoptotic networks. Blood 2019; 133:1677-1690. [PMID: 30635286 DOI: 10.1182/blood-2018-08-872648] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 01/07/2019] [Indexed: 01/27/2023] Open
Abstract
Over 80% of patients with myeloproliferative neoplasms (MPNs) harbor the acquired somatic JAK2 V617F mutation. JAK inhibition is not curative and fails to induce a persistent response in most patients, illustrating the need for the development of novel therapeutic approaches. We describe a critical role for CDK6 in MPN evolution. The absence of Cdk6 ameliorates clinical symptoms and prolongs survival. The CDK6 protein interferes with 3 hallmarks of disease: besides regulating malignant stem cell quiescence, it promotes nuclear factor κB (NF-κB) signaling and contributes to cytokine production while inhibiting apoptosis. The effects are not mirrored by palbociclib, showing that the functions of CDK6 in MPN pathogenesis are largely kinase independent. Our findings thus provide a rationale for targeting CDK6 in MPN.
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14
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Bennett JA, Singh KP, Welle SL, Boule LA, Lawrence BP, Gasiewicz TA. Conditional deletion of Ahr alters gene expression profiles in hematopoietic stem cells. PLoS One 2018; 13:e0206407. [PMID: 30388136 PMCID: PMC6214519 DOI: 10.1371/journal.pone.0206407] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 10/14/2018] [Indexed: 01/01/2023] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand activated bHLH transcription factor that belongs to the Per-Arnt-Sim (PAS) superfamily of proteins involved in mediating responses to cellular environment regulating normal physiological and developmental pathways. The AHR binds a broad range of naturally derived and synthetic compounds, and plays a major role in mediating effects of certain environmental chemicals. Although our understanding of the physiological roles of the AHR in the immune system is evolving, there is little known about its role in hematopoiesis and hematopoietic diseases. Prior studies demonstrated that AHR null (AHR-KO) mice have impaired hematopoietic stem cell (HSC) function; they develop myeloproliferative changes in peripheral blood cells, and alterations in hematopoietic stem and progenitor cell populations in the bone marrow. We hypothesized mice lacking AHR expression only within hematopoietic cells (AHRVav1 mice) would develop similar changes. However, we did not observe a complete phenocopy of AHR-KO and AHRVav1 animals at 2 or 18 months of age. To illuminate the signaling mechanisms underlying the alterations in hematopoiesis observed in these mice, we sorted a population of cells highly enriched for HSC function (LSK cells: CD34-CD48-CD150+) and performed microarray analyses. Ingenuity Pathway and Gene Set Enrichment Analyses revealed that that loss of AHR within HSCs alters several gene and signaling networks important for HSC function. Differences in gene expression networks among HSCs from AHR-KO and AHRVav1 mice suggest that AHR in bone marrow stromal cells also contributes to HSC function. In addition, numerous studies have suggested a role for AHR in both regulation of hematopoietic cells, and in the development of blood diseases. More work is needed to define what these signals are, and how they act upon HSCs.
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Affiliation(s)
- John A. Bennett
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Kameshwar P. Singh
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Stephen L. Welle
- Department of Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Lisbeth A. Boule
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - B. Paige Lawrence
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Thomas A. Gasiewicz
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
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15
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Wu D, Li D, Liu Z, Liu X, Zhou S, Duan H. Role and underlying mechanism of SPATA12 in oxidative damage. Oncol Lett 2018; 15:3676-3684. [PMID: 29467887 PMCID: PMC5796374 DOI: 10.3892/ol.2018.7749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 11/02/2017] [Indexed: 12/19/2022] Open
Abstract
Spermatogenesis-associated gene 12 (SPATA12) functions as an inhibitor in spermatogenesis and tumorigenesis. Our previous study demonstrated that SPATA12 may be induced in tumor cells by ultraviolet (UV) C-mediated DNA damage, suggesting its importance in maintaining genomic integrity. In order to understand whether and how SPATA12 responds to oxidative damage, the present study established a cellular model of oxidative stress by detecting the effect of H2O2 on cell viability and intracellular superoxide dismutase activity, and the levels of glutathione and malondialdehyde (MDA). Quantitative polymerase chain reaction results demonstrated that H2O2 upregulated the expression of SPATA12, and a dual luciferase reporter gene assay indicated that transcription factor activator protein-1 (AP-1) was involved in the response of SPATA12 to oxidative stress. Through the exogenous expression of SPATA12, it was identified that SPATA12 decreased the level of reactive oxygen species and MDA, and also may reduce the degree of cellular oxidative damage and apoptosis induced by H2O2. In addition, resveratrol was demonstrated to increase the expression of SPATA12 by activating AP-1, and it may be used as a nontoxic activator of the SPATA12 gene. In conclusion, these results suggest that SPATA12 is upregulated by oxidative stress via AP-1, and that the exogenous expression of SPATA12 protects against H2O2-induced oxidative damage and apoptosis.
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Affiliation(s)
- Daobing Wu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Dan Li
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Zhiyong Liu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Xiaowen Liu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Shihua Zhou
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Hongyan Duan
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
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16
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Zhou X, Hong T, Yu Q, Nie S, Gong D, Xiong T, Xie M. Exopolysaccharides from Lactobacillus plantarum NCU116 induce c-Jun dependent Fas/Fasl-mediated apoptosis via TLR2 in mouse intestinal epithelial cancer cells. Sci Rep 2017; 7:14247. [PMID: 29079852 PMCID: PMC5660251 DOI: 10.1038/s41598-017-14178-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/05/2017] [Indexed: 01/07/2023] Open
Abstract
Exopolysaccharides (EPS) from lactic acid bacteria (LAB) have been reported to play vital parts in the modulation of cell-cycle and apoptosis in cancer cells. However, the mechanisms by which EPS regulate the proliferation and apoptosis of cancer cells remain incompletely understood. We thus used different cancer cells to evaluate the anticancer ability and to investigate the underlying molecular mechanism of EPS from Lactobacillus plantarum NCU116 (EPS116). Our studies showed that EPS116 inhibited the proliferation of cancer cells in a cell type manner, and remarkably repressed the growth and survival of CT26 through induction of apoptosis. Moreover, EPS116 increased the expression of pro-apoptotic genes, including Fas, Fasl and c-Jun, induced the phosphorylation of c-Jun in CT26 cells. Furthermore, TLR2 (Toll like receptor 2) was upregulated by EPS116, and the CT26 cells with TLR2 knockdown were found to be insensitive to EPS116, suggesting that the anti-cancer activity of EPS116 may be TLR2-dependent. Taken together, the suppressive efficacy of EPS116 on the proliferation of CT26 cells may be mediated via TLR2 and the activation of c-Jun dependent Fas/Fasl-mediated apoptotic pathway. Our study has, for the first time, shown that EPS from LAB induced c-Jun dependent Fas/Fasl-mediated apoptosis via TLR2 in CT26 cells.
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Affiliation(s)
- Xingtao Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China
| | - Tao Hong
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China
| | - Qiang Yu
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China
| | - Shaoping Nie
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China.
| | - Deming Gong
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China.,New Zealand Institute of Natural Medicine Research, 8 Ha Crescent, Auckland, 2041, New Zealand
| | - Tao Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China
| | - Mingyong Xie
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi, 330047, China.
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17
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Static and Dynamic DNA Loops form AP-1-Bound Activation Hubs during Macrophage Development. Mol Cell 2017; 67:1037-1048.e6. [PMID: 28890333 DOI: 10.1016/j.molcel.2017.08.006] [Citation(s) in RCA: 187] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/21/2017] [Accepted: 08/11/2017] [Indexed: 01/25/2023]
Abstract
The three-dimensional arrangement of the human genome comprises a complex network of structural and regulatory chromatin loops important for coordinating changes in transcription during human development. To better understand the mechanisms underlying context-specific 3D chromatin structure and transcription during cellular differentiation, we generated comprehensive in situ Hi-C maps of DNA loops in human monocytes and differentiated macrophages. We demonstrate that dynamic looping events are regulatory rather than structural in nature and uncover widespread coordination of dynamic enhancer activity at preformed and acquired DNA loops. Enhancer-bound loop formation and enhancer activation of preformed loops together form multi-loop activation hubs at key macrophage genes. Activation hubs connect 3.4 enhancers per promoter and exhibit a strong enrichment for activator protein 1 (AP-1)-binding events, suggesting that multi-loop activation hubs involving cell-type-specific transcription factors represent an important class of regulatory chromatin structures for the spatiotemporal control of transcription.
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18
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RUNX1 regulates site specificity of DNA demethylation by recruitment of DNA demethylation machineries in hematopoietic cells. Blood Adv 2017; 1:1699-1711. [PMID: 29296817 DOI: 10.1182/bloodadvances.2017005710] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 07/20/2017] [Indexed: 11/20/2022] Open
Abstract
RUNX1 is an essential master transcription factor in hematopoietic development and plays important roles in immune functions. Although the gene regulatory mechanism of RUNX1 has been characterized extensively, the epigenetic role of RUNX1 remains unclear. Here, we demonstrate that RUNX1 contributes DNA demethylation in a binding site-directed manner in human hematopoietic cells. Overexpression analysis of RUNX1 showed the RUNX1-binding site-directed DNA demethylation. The RUNX1-mediated DNA demethylation was also observed in DNA replication-arrested cells, suggesting an involvement of active demethylation mechanism. Coimmunoprecipitation in hematopoietic cells showed physical interactions between RUNX1 and DNA demethylation machinery enzymes TET2, TET3, TDG, and GADD45. Further chromatin immunoprecipitation sequencing revealed colocalization of RUNX1 and TET2 in the same genomic regions, indicating recruitment of DNA demethylation machinery by RUNX1. Finally, methylome analysis revealed significant overrepresentation of RUNX1-binding sites at demethylated regions during hematopoietic development. Collectively, the present data provide evidence that RUNX1 contributes site specificity of DNA demethylation by recruitment of TET and other demethylation-related enzymes to its binding sites in hematopoietic cells.
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19
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Ubieta K, Garcia M, Grötsch B, Uebe S, Weber GF, Stein M, Ekici A, Schett G, Mielenz D, Bozec A. Fra-2 regulates B cell development by enhancing IRF4 and Foxo1 transcription. J Exp Med 2017; 214:2059-2071. [PMID: 28566276 PMCID: PMC5502419 DOI: 10.1084/jem.20160514] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 10/21/2016] [Accepted: 04/14/2017] [Indexed: 12/02/2022] Open
Abstract
The role of AP-1 transcription factors in early B cell development and function is still incompletely characterized. Ubieta at al. describe the function of the Fra-2/AP-1 transcription factor as a regulator of Foxo1 and Irf4 expression in B cells. Fra-2 affects B cell proliferation and maintains their number in bone marrow. The role of AP-1 transcription factors in early B cell development and function is still incompletely characterized. Here we address the role of Fra-2 in B cell differentiation. Deletion of Fra-2 leads to impaired B cell proliferation in the bone marrow. In addition, IL-7–stimulated pro–B cell cultures revealed a reduced differentiation from large pre–B cells to small B cells and immature B cells. Gene profiling and chromatin immunoprecipitation sequencing analyses unraveled a transcriptional reduction of the transcription factors Foxo1, Irf4, Ikaros, and Aiolos in Fra-2–deficient B cells. Moreover, expression of IL7Rα and Rag 1/2, downstream targets of Irf4 and Foxo1, were also reduced in the absence of Fra-2. Pro–B cell proliferation and small pre–B cell differentiation were fully rescued by expression of Foxo1 and Irf4 in Fra-2–deficient pro–B cells. Hence, Fra-2 is a key upstream regulator of Foxo1 and Irf4 expression and influences proliferation and differentiation of B cells at multiple stages.
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Affiliation(s)
- Kenia Ubieta
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany.,Department of Surgery, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Mireia Garcia
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Bettina Grötsch
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Steffen Uebe
- Institute of Human Genetics, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Georg F Weber
- Department of Surgery, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Merle Stein
- Division of Molecular Immunology, Department of Internal Medicine 3 - Rheumatology and Immunology, Nikolaus-Fiebiger-Center, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Arif Ekici
- Institute of Human Genetics, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Georg Schett
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Dirk Mielenz
- Division of Molecular Immunology, Department of Internal Medicine 3 - Rheumatology and Immunology, Nikolaus-Fiebiger-Center, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Aline Bozec
- Department of Internal Medicine 3 - Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
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20
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Shikama Y, Cao M, Ono T, Feng X, Noji H, Kimura H, Ogawa K, Suzuki Y, Ikeda K, Takeishi Y, Kimura J. Reduction of c-Fos via Overexpression of miR-34a Results in Enhancement of TNF- Production by LPS in Neutrophils from Myelodysplastic Syndrome Patients. PLoS One 2016; 11:e0158527. [PMID: 27513856 PMCID: PMC4981319 DOI: 10.1371/journal.pone.0158527] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 06/16/2016] [Indexed: 02/07/2023] Open
Abstract
Although increased TNF-α has been considered to cause ineffective hematopoiesis in myelodysplastic syndromes (MDS), the mechanisms of TNF-α elevation are not known. We recently found that c-Fos mRNA stabilization under translation-inhibiting stimuli was impaired in MDS-derived neutrophilic granulocytes. In the current study, we identified overexpression of c-Fos-targeting miR-34a and miR-155 as the cause of impairment. Expression levels of miR-34a but not miR-155 inversely correlated with ratios of c-Fos-positive cells in MDS-derived CD16+ neutrophils (r = -0.618, P<0.05), which were analyzed by flow cytometry. Among the seventeen patients, c-Fos was detectable in less than 60% of CD16+ cells in eight patients (Group A), while five (Group B) expressed c-Fos in more than 80% of CD16+ cells, which was consistent with the controls (88.6 ± 7.8%). Group A-derived granulocytes secreted more TNF-α in response to 1 μM LPS for 3 hours (735.4 ± 237.5 pg/mL) than Group B (143.5 ± 65.7 pg/mL, P<0.05) and healthy controls (150.8 ± 91.5 pg/mL, P<0.05). Knockdown of c-Fos in neutrophil-like differentiated HL60 increased the binding of NF-κB p65 to the promoter region of TNF-α DNA. Thus, c-Fos reduction via overexpression of miR-34a contributes to TNF-α overproduction under inflammatory stimuli in MDS.
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Affiliation(s)
- Yayoi Shikama
- Department of Pharmacology, Fukushima Medical University, Fukushima, Japan
- * E-mail:
| | - Meiwan Cao
- Department of Pharmacology, Fukushima Medical University, Fukushima, Japan
| | - Tomoyuki Ono
- Department of Pharmacology, Fukushima Medical University, Fukushima, Japan
| | - Xiaomin Feng
- Department of Pharmacology, Fukushima Medical University, Fukushima, Japan
| | - Hideyoshi Noji
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
| | - Hideo Kimura
- Department of Hematology, Kita Fukushima Medical Center, Date, Japan
| | - Kazuei Ogawa
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
| | - Yuko Suzuki
- Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University, Fukushima, Japan
| | - Kazuhiko Ikeda
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
- Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University, Fukushima, Japan
| | - Yasuchika Takeishi
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
| | - Junko Kimura
- Department of Pharmacology, Fukushima Medical University, Fukushima, Japan
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21
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Sharmin M, Bravo HC, Hannenhalli S. Heterogeneity of transcription factor binding specificity models within and across cell lines. Genome Res 2016; 26:1110-23. [PMID: 27311443 PMCID: PMC4971765 DOI: 10.1101/gr.199166.115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 06/16/2016] [Indexed: 12/24/2022]
Abstract
Complex gene expression patterns are mediated by the binding of transcription factors (TFs) to specific genomic loci. The in vivo occupancy of a TF is, in large part, determined by the TF's DNA binding interaction partners, motivating genomic context-based models of TF occupancy. However, approaches thus far have assumed a uniform TF binding model to explain genome-wide cell-type–specific binding sites. Therefore, the cell type heterogeneity of TF occupancy models, as well as the extent to which binding rules underlying a TF's occupancy are shared across cell types, has not been investigated. Here, we develop an ensemble-based approach (TRISECT) to identify the heterogeneous binding rules for cell-type–specific TF occupancy and analyze the inter-cell-type sharing of such rules. Comprehensive analysis of 23 TFs, each with ChIP-seq data in four to 12 different cell types, shows that by explicitly capturing the heterogeneity of binding rules, TRISECT accurately identifies in vivo TF occupancy. Importantly, many of the binding rules derived from individual cell types are shared across cell types and reveal distinct yet functionally coherent putative target genes in different cell types. Closer inspection of the predicted cell-type–specific interaction partners provides insights into the context-specific functional landscape of a TF. Together, our novel ensemble-based approach reveals, for the first time, a widespread heterogeneity of binding rules, comprising the interaction partners within a cell type, many of which nevertheless transcend cell types. Notably, the putative targets of shared binding rules in different cell types, while distinct, exhibit significant functional coherence.
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Affiliation(s)
- Mahfuza Sharmin
- Department of Computer Science, University of Maryland, College Park, Maryland 20742, USA; Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA
| | - Héctor Corrada Bravo
- Department of Computer Science, University of Maryland, College Park, Maryland 20742, USA; Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA
| | - Sridhar Hannenhalli
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA; Department of Cell and Molecular Biology, University of Maryland, College Park, Maryland 20742, USA
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22
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Engström W, Darbre P, Eriksson S, Gulliver L, Hultman T, Karamouzis MV, Klaunig JE, Mehta R, Moorwood K, Sanderson T, Sone H, Vadgama P, Wagemaker G, Ward A, Singh N, Al-Mulla F, Al-Temaimi R, Amedei A, Colacci AM, Vaccari M, Mondello C, Scovassi AI, Raju J, Hamid RA, Memeo L, Forte S, Roy R, Woodrick J, Salem HK, Ryan EP, Brown DG, Bisson WH. The potential for chemical mixtures from the environment to enable the cancer hallmark of sustained proliferative signalling. Carcinogenesis 2015; 36 Suppl 1:S38-60. [PMID: 26106143 DOI: 10.1093/carcin/bgv030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The aim of this work is to review current knowledge relating the established cancer hallmark, sustained cell proliferation to the existence of chemicals present as low dose mixtures in the environment. Normal cell proliferation is under tight control, i.e. cells respond to a signal to proliferate, and although most cells continue to proliferate into adult life, the multiplication ceases once the stimulatory signal disappears or if the cells are exposed to growth inhibitory signals. Under such circumstances, normal cells remain quiescent until they are stimulated to resume further proliferation. In contrast, tumour cells are unable to halt proliferation, either when subjected to growth inhibitory signals or in the absence of growth stimulatory signals. Environmental chemicals with carcinogenic potential may cause sustained cell proliferation by interfering with some cell proliferation control mechanisms committing cells to an indefinite proliferative span.
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Affiliation(s)
- Wilhelm Engström
- Department of Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, PO Box 7028, 75007 Uppsala, Sweden,
| | - Philippa Darbre
- School of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6UB, UK
| | - Staffan Eriksson
- Department of Biochemistry, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Box 575, 75123 Uppsala, Sweden
| | - Linda Gulliver
- Faculty of Medicine, University of Otago, PO Box 913, Dunedin 9050, New Zealand
| | - Tove Hultman
- Department of Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, PO Box 7028, 75007 Uppsala, Sweden, School of Biological Sciences, University of Reading, Whiteknights, Reading RG6 6UB, UK
| | - Michalis V Karamouzis
- Department of Biological Chemistry Medical School, Institute of Molecular Medicine and Biomedical Research, University of Athens, Marasli 3, Kolonaki, Athens 10676, Greece
| | - James E Klaunig
- Department of Environmental Health, School of Public Health, Indiana University Bloomington , 1025 E. 7th Street, Suite 111, Bloomington, IN 47405, USA
| | - Rekha Mehta
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, HPFB, Health Canada, 251 Sir F.G. Banting Driveway, AL # 2202C, Tunney's Pasture, Ottawa, Ontario K1A 0K9, Canada
| | - Kim Moorwood
- Department of Biochemistry and Biology, University of Bath , Claverton Down, Bath BA2 7AY, UK
| | - Thomas Sanderson
- INRS-Institut Armand-Frappier, 531 boulevard des Prairies, Laval, Quebec H7V 1B7, Canada
| | - Hideko Sone
- Environmental Exposure Research Section, Center for Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibraki 3058506, Japan
| | - Pankaj Vadgama
- IRC in Biomedical Materials, School of Engineering & Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Gerard Wagemaker
- Center for Stem Cell Research and Development, Hacettepe University, Ankara 06100, Turkey
| | - Andrew Ward
- Department of Biochemistry and Biology, University of Bath , Claverton Down, Bath BA2 7AY, UK
| | - Neetu Singh
- Centre for Advanced Research, King George's Medical University, Chowk, Lucknow, Uttar Pradesh 226003, India
| | - Fahd Al-Mulla
- Department of Pathology, Kuwait University, Safat 13110, Kuwait
| | | | - Amedeo Amedei
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze 50134, Italy
| | - Anna Maria Colacci
- Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna 40126, Italy
| | - Monica Vaccari
- Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna 40126, Italy
| | - Chiara Mondello
- Institute of Molecular Genetics, National Research Council, Pavia 27100, Italy
| | - A Ivana Scovassi
- Institute of Molecular Genetics, National Research Council, Pavia 27100, Italy
| | - Jayadev Raju
- Regulatoty Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, HPFB, Health Canada, Ottawa, Ontario K1A0K9, Canada
| | - Roslida A Hamid
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Lorenzo Memeo
- Mediterranean Institute of Oncology, Viagrande 95029, Italy
| | - Stefano Forte
- Mediterranean Institute of Oncology, Viagrande 95029, Italy
| | - Rabindra Roy
- Molecular Oncology Program, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Jordan Woodrick
- Molecular Oncology Program, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Hosni K Salem
- Urology Dept. kasr Al-Ainy School of Medicine, Cairo University, El Manial, Cairo 12515, Egypt
| | - Elizabeth P Ryan
- Department of Environmental and Radiological Sciences, Colorado State University//Colorado School of Public Health, Fort Collins CO 80523-1680, USA and
| | - Dustin G Brown
- Department of Environmental and Radiological Sciences, Colorado State University//Colorado School of Public Health, Fort Collins CO 80523-1680, USA and
| | - William H Bisson
- Environmental and Molecular Toxicology, Environmental Health Sciences Center, Oregon State University, Corvallis, OR 97331, USA
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23
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Hänggi P, Telezhkin V, Kemp PJ, Schmugge M, Gassmann M, Goede JS, Speer O, Bogdanova A. Functional plasticity of the N-methyl-d-aspartate receptor in differentiating human erythroid precursor cells. Am J Physiol Cell Physiol 2015; 308:C993-C1007. [PMID: 25788577 PMCID: PMC4469746 DOI: 10.1152/ajpcell.00395.2014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 03/17/2015] [Indexed: 11/22/2022]
Abstract
Calcium signaling is essential to support erythroid proliferation and differentiation. Precise control of the intracellular Ca2+ levels in erythroid precursor cells (EPCs) is afforded by coordinated expression and function of several cation channels, including the recently identified N-methyl-d-aspartate receptor (NMDAR). Here, we characterized the changes in Ca2+ uptake and electric currents mediated by the NMDARs occurring during EPC differentiation using flow cytometry and patch clamp. During erythropoietic maturation, subunit composition and properties of the receptor changed; in proerythroblasts and basophilic erythroblasts, fast deactivating currents with high amplitudes were mediated by the GluN2A subunit-dominated receptors, while at the polychromatic and orthochromatic erythroblast stages, the GluN2C subunit was getting more abundant, overriding the expression of GluN2A. At these stages, the currents mediated by the NMDARs carried the features characteristic of the GluN2C-containing receptors, such as prolonged decay time and lower conductance. Kinetics of this switch in NMDAR properties and abundance varied markedly from donor to donor. Despite this variability, NMDARs were essential for survival of EPCs in any subject tested. Our findings indicate that NMDARs have a dual role during erythropoiesis, supporting survival of polychromatic erythroblasts and contributing to the Ca2+ homeostasis from the orthochromatic erythroblast stage to circulating red blood cells.
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Affiliation(s)
- Pascal Hänggi
- Institute of Veterinary Physiology, University of Zurich, Zurich, Switzerland; Division of Hematology University Hospital Zurich, Zurich, Switzerland; University Children's Hospital, Zurich, Switzerland
| | - Vsevolod Telezhkin
- Division of Pathophysiology and Repair, School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Paul J Kemp
- Division of Pathophysiology and Repair, School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Markus Schmugge
- University Children's Hospital, Zurich, Switzerland; Children's Research Center, Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Max Gassmann
- Institute of Veterinary Physiology, University of Zurich, Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Jeroen S Goede
- Division of Hematology University Hospital Zurich, Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Oliver Speer
- University Children's Hospital, Zurich, Switzerland; Children's Research Center, Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Anna Bogdanova
- Institute of Veterinary Physiology, University of Zurich, Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
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24
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Identification of differentially expressed genes regulated by transcription factors in glioblastomas by bioinformatics analysis. Mol Med Rep 2014; 11:2548-54. [PMID: 25514975 PMCID: PMC4337481 DOI: 10.3892/mmr.2014.3094] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 11/07/2014] [Indexed: 11/05/2022] Open
Abstract
The present study aimed to identify differentially expressed genes (DEGs) regulated by transcription factors (TFs) in glioblastoma, by conducting a bioinformatics analysis. The results of the present study may provide potential therapeutic targets that are involved in the development of glioblastoma. The GSE4290 raw data set was downloaded from the Gene Expression Omnibus database, and consisted of 23 non‑tumor samples and 77 glioblastoma (grade 4) tumor samples. Robust Multichip Averaging was used to identify DEGs between the glioblastoma and non‑tumor samples. Functional enrichment analysis of the DEGs was also performed. Based on the TRANSFAC® database, TFs associated with the glioblastoma gene expression profile were used to construct a regulatory network. Furthermore, trimmed subnets were identified according to calculated Z‑scores. A total of 676 DEGs were identified, of which 190 were upregulated and 496 were downregulated. Gene Ontology analysis demonstrated that the majority of these DEGs were functionally enriched in synaptic transmission, regulation of vesicle‑mediated transport and ion‑gated channel activity. In addition, the enriched Kyoto Encyclopedia of Genes and Genomes pathway included neuroactive ligand‑receptor interaction, calcium signaling pathway, p53 signaling pathway and cell cycle. Based on the TRANSFAC® database, transcriptional regulatory networks with 2,246 nodes and 4,515 regulatory pairs were constructed. According to the Z‑scores, the following candidate TFs were identified: TP53, SP1, JUN, STAT3 and SPI1; alongside their downstream DEGs. TP53 was the only differentially expressed TF. These candidate TFs and their downstream DEGs may have important roles in the progression of glioblastoma, and could be potential biomarkers for clinical treatment.
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25
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Park SJ, Umemoto T, Saito-Adachi M, Shiratsuchi Y, Yamato M, Nakai K. Computational promoter modeling identifies the modes of transcriptional regulation in hematopoietic stem cells. PLoS One 2014; 9:e93853. [PMID: 24710559 PMCID: PMC3977923 DOI: 10.1371/journal.pone.0093853] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 03/07/2014] [Indexed: 01/19/2023] Open
Abstract
Extrinsic and intrinsic regulators are responsible for the tight control of hematopoietic stem cells (HSCs), which differentiate into all blood cell lineages. To understand the fundamental basis of HSC biology, we focused on differentially expressed genes (DEGs) in long-term and short-term HSCs, which are closely related in terms of cell development but substantially differ in their stem cell capacity. To analyze the transcriptional regulation of the DEGs identified in the novel transcriptome profiles obtained by our RNA-seq analysis, we developed a computational method to model the linear relationship between gene expression and the features of putative regulatory elements. The transcriptional regulation modes characterized here suggest the importance of transcription factors (TFs) that are expressed at steady state or at low levels. Remarkably, we found that 24 differentially expressed TFs targeting 21 putative TF-binding sites contributed significantly to transcriptional regulation. These TFs tended to be modulated by other nondifferentially expressed TFs, suggesting that HSCs can achieve flexible and rapid responses via the control of nondifferentially expressed TFs through a highly complex regulatory network. Our novel transcriptome profiles and new method are powerful tools for studying the mechanistic basis of cell fate decisions.
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Affiliation(s)
- Sung-Joon Park
- Human Genome Center, the Institute of Medical Science, the University of Tokyo, Tokyo, Japan
| | - Terumasa Umemoto
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan
| | - Mihoko Saito-Adachi
- Human Genome Center, the Institute of Medical Science, the University of Tokyo, Tokyo, Japan
| | - Yoshiko Shiratsuchi
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan
| | - Masayuki Yamato
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan
| | - Kenta Nakai
- Human Genome Center, the Institute of Medical Science, the University of Tokyo, Tokyo, Japan
- * E-mail:
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26
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Liu A, Chen S, Cai S, Dong L, Liu L, Yang Y, Guo F, Lu X, He H, Chen Q, Hu S, Qiu H. Wnt5a through noncanonical Wnt/JNK or Wnt/PKC signaling contributes to the differentiation of mesenchymal stem cells into type II alveolar epithelial cells in vitro. PLoS One 2014; 9:e90229. [PMID: 24658098 PMCID: PMC3962348 DOI: 10.1371/journal.pone.0090229] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 01/27/2014] [Indexed: 01/11/2023] Open
Abstract
The differentiation of mesenchymal stem cells (MSCs) into type II alveolar epithelial (AT II) cells is critical for reepithelization and recovery in acute respiratory distress syndrome (ARDS), and Wnt signaling was considered to be the underlying mechanisms. In our previous study, we found that canonical Wnt pathway promoted the differentiation of MSCs into AT II cells, however the role of the noncanonical Wnt pathway in this process is unclear. It was disclosed in this study that noncanonical Wnt signaling in mouse bone marrow-derived MSCs (mMSCs) was activated during the differentiation of mMSCs into AT II cells in a modified co-culture system with murine lung epithelial-12 cells and small airway growth media. The levels of surfactant protein (SP) C, SPB and SPD, the specific markers of AT II cells, increased in mMSCs when Wnt5a was added to activate noncanonical Wnt signaling, while pretreatment with JNK or PKC inhibitors reversed the promotion of Wnt5a. The differentiation rate of mMSCs also depends on their abilities to accumulate and survive in inflammatory tissue. We found that the Wnt5a supplement promoted the vertical and horizontal migration of mMSCs, ameliorated the cell death and the reduction of Bcl-2/Bax induced by H2O2. The effect of Wnt5a on the migration of mMSCs and their survival after H2O2 exposure were partially inhibited with PKC or JNK blockers. In conclusion, Wnt5a through Wnt/JNK signaling alone or both Wnt/JNK and Wnt/PKC signaling promoted the differentiation of mMSCs into AT II cells and the migration of mMSCs; through Wnt/PKC signaling, Wnt5a increased the survival of mMSCs after H2O2 exposure in vitro.
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Affiliation(s)
- Airan Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Song Chen
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing, P. R. China
| | - Shixia Cai
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Liang Dong
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Le Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Yi Yang
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Fengmei Guo
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Xiaomin Lu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Hongli He
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Qihong Chen
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Shuling Hu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
| | - Haibo Qiu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, P. R. China
- * E-mail:
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27
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Impairment of FOS mRNA stabilization following translation arrest in granulocytes from myelodysplastic syndrome patients. PLoS One 2013; 8:e61107. [PMID: 23593403 PMCID: PMC3625160 DOI: 10.1371/journal.pone.0061107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 03/05/2013] [Indexed: 02/06/2023] Open
Abstract
Although quantitative and qualitative granulocyte defects have been described in myelodysplastic syndromes (MDS), the underlying molecular basis of granulocyte dysfunction in MDS is largely unknown. We recently found that FOS mRNA elevation under translation-inhibiting stimuli was significantly smaller in granulocytes from MDS patients than in healthy individuals. The aim of this study is to clarify the cause of the impaired FOS induction in MDS. We first examined the mechanisms of FOS mRNA elevation using granulocytes from healthy donors cultured with the translation inhibitor emetine. Emetine increased both transcription and mRNA stability of FOS. p38 MAPK inhibition abolished the emetine-induced increase of FOS transcription but did not affect FOS mRNA stabilization. The binding of an AU-rich element (ARE)-binding protein HuR to FOS mRNA containing an ARE in 3'UTR was increased by emetine, and the knockdown of HuR reduced the FOS mRNA stabilizing effect of emetine. We next compared the emetine-induced transcription and mRNA stabilization of FOS between MDS patients and healthy controls. Increased rates of FOS transcription by emetine were similar in MDS and controls. In the absence of emetine, FOS mRNA decayed to nearly 17% of initial levels in 45 min in both groups. In the presence of emetine, however, 76.7±19.8% of FOS mRNA remained after 45 min in healthy controls, versus 37.9±25.5% in MDS (P<0.01). To our knowledge, this is the first report demonstrating attenuation of stress-induced FOS mRNA stabilization in MDS granulocytes.
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28
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Bauer W, Rauner M, Haase M, Kujawski S, Arabanian LS, Habermann I, Hofbauer LC, Ehninger G, Kiani A. Osteomyelosclerosis, anemia and extramedullary hematopoiesis in mice lacking the transcription factor NFATc2. Haematologica 2011; 96:1580-8. [PMID: 21750088 DOI: 10.3324/haematol.2011.042515] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Nuclear factors of activated T cells (NFAT) are transcription factors that are central to cytokine production in activated T cells and regulate the development and differentiation of various tissues. NFATc2 is expressed in hematopoietic stem cells and regulated during myeloid commitment in a lineage-specific manner. The biological role of NFATc2 in hematopoiesis is, however, unclear. DESIGN AND METHODS In the present study, we analyzed steady-state hematopoiesis in young (<3 months) and old (>12 months) mice lacking NFATc2. Complete blood counts were performed in the peripheral blood, bone marrow and spleen. Using cytological and histological analyses, the blood cell differential was determined. Colony-formation assays were used to determine the differentiation potential of hematopoietic cells. Bone cell cultures were derived from the bone marrow, and bone remodeling markers were determined in the serum. RESULTS NFATc2(-/-) mice older than 12 months were anemic and thrombocytopenic. The bone marrows of these mice showed a markedly reduced number of hematopoietic cells, of which megakaryocytic and erythroid lineages were most affected. While the number of hematopoietic progenitor cells in NFATc2-deficent bone marrow was reduced, the myeloid differentiation potential of these cells remained intact. Aged NFATc2(-/-) mice showed ossification of their bone marrow space and developed extramedullary hematopoiesis in the spleen. Ex vivo differentiation assays revealed an intrinsic defect of NFATc2-deficient stromal cells, in which NFATc2(-/-) osteoblasts differentiated more efficiently than wild-type cells, whereas osteoclast differentiation was impaired. CONCLUSIONS Our data suggest that NFATc2 may play a role in the maintenance of steady-state hematopoiesis and bone remodeling in adult organisms.
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Affiliation(s)
- Wolfgang Bauer
- Department of Medicine I, Technical University Dresden, Dresden, Germany
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29
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Colin L, Vandenhoudt N, de Walque S, Van Driessche B, Bergamaschi A, Martinelli V, Cherrier T, Vanhulle C, Guiguen A, David A, Burny A, Herbein G, Pancino G, Rohr O, Van Lint C. The AP-1 binding sites located in the pol gene intragenic regulatory region of HIV-1 are important for viral replication. PLoS One 2011; 6:e19084. [PMID: 21526160 PMCID: PMC3079759 DOI: 10.1371/journal.pone.0019084] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 03/15/2011] [Indexed: 01/06/2023] Open
Abstract
Our laboratory has previously identified an important intragenic region in the human immunodeficiency virus type 1 (HIV-1) genome, whose complete functional unit is composed of the 5103 fragment, the DNaseI-hypersensitive site HS7 and the 5105 fragment. These fragments (5103 and 5105) both exhibit a phorbol 12-myristate 13-acetate (PMA)-inducible enhancer activity on the herpes simplex virus thymidine kinase promoter. Here, we characterized the three previously identified AP-1 binding sites of fragment 5103 by showing the PMA-inducible in vitro binding and in vivo recruitment of c-Fos, JunB and JunD to this fragment located at the end of the pol gene. Functional analyses demonstrated that the intragenic AP-1 binding sites are fully responsible for the PMA-dependent enhancer activity of fragment 5103. Moreover, infection of T-lymphoid Jurkat and promonocytic U937 cells with wild-type and mutant viruses demonstrated that mutations of the intragenic AP-1 sites individually or in combination altered HIV-1 replication. Importantly, mutations of the three intragenic AP-1 sites led to a decreased in vivo recruitment of RNA polymerase II to the viral promoter, strongly supporting that the deleterious effect of these mutations on viral replication occurs, at least partly, at the transcriptional level. Single-round infections of monocyte-derived macrophages confirmed the importance of intragenic AP-1 sites for HIV-1 infectivity.
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Affiliation(s)
- Laurence Colin
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Nathalie Vandenhoudt
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Stéphane de Walque
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Benoît Van Driessche
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Anna Bergamaschi
- Institut Pasteur, Unité de Régulation des Infections Rétrovirales, Paris, France
| | - Valérie Martinelli
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Thomas Cherrier
- IUT Louis Pasteur de Schiltigheim, University of Strasbourg, Schiltigheim, France
| | - Caroline Vanhulle
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Allan Guiguen
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Annie David
- Institut Pasteur, Unité de Régulation des Infections Rétrovirales, Paris, France
| | - Arsène Burny
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Georges Herbein
- Department of Virology, EA3186, IFR133, Franche-Comte University, Hôpital Saint-Jacques, Besançon, France
| | - Gianfranco Pancino
- Institut Pasteur, Unité de Régulation des Infections Rétrovirales, Paris, France
| | - Olivier Rohr
- IUT Louis Pasteur de Schiltigheim, University of Strasbourg, Schiltigheim, France
| | - Carine Van Lint
- Laboratoire de Virologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles (ULB), Gosselies, Belgium
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Bobilev I, Novik V, Levi I, Shpilberg O, Levy J, Sharoni Y, Studzinski GP, Danilenko M. The Nrf2 transcription factor is a positive regulator of myeloid differentiation of acute myeloid leukemia cells. Cancer Biol Ther 2011; 11:317-29. [PMID: 21099366 DOI: 10.4161/cbt.11.3.14098] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
1α,25-dihydroxyvitamin D3 (1,25D) is a powerful differentiation agent, which has potential for treatment of acute myeloid leukemia (AML), but induces severe hypercalcemia at pharmacologically active doses. We have previously shown that carnosic acid (CA), the polyphenolic antioxidant from rosemary plant, markedly potentiates differentiation induced by low concentrations of 1,25D in human AML cell lines. Here, we demonstrated similar enhanced differentiation responses to the 1,25D/CA combination in primary leukemic cells derived from patients with AML, and determined the role of the Nrf2/antioxidant response element (Nrf2/ARE) pathway in these effects using U937 human monoblastic leukemia cells as the model. CA strongly transactivated the ARE-luciferase reporter gene, induced the ARE-responsive genes, NADP(H)-quinone oxidoreductase and the γ-glutamylcysteine synthetase heavy subunit, and elevated cellular glutathione levels. Interestingly, 1,25D potentiated the effects of CA on these activities. Stable transfection of wild-type (wt) Nrf2 resulted in the enhancement, while transfection of dominant-negative (dn) Nrf2 produced suppression of differentiation induced by the 1,25D/CA combination and, surprisingly, by 1,25D alone. These opposite effects were associated with a corresponding increase or decrease in vitamin D receptor and retinoid X receptor-α protein levels, and in vitamin D responsive element transactivation. Cells transfected with wtNrf2 and dnNrf2 also displayed opposing changes in the levels of the AP-1 family proteins (c-Jun and ATF2) and AP-1 transcriptional activity. Pretreatment with AP-1 decoy oligodeoxynucleotide markedly attenuated the differentiation in wtNrf2-transfected cells, suggesting that the pro-differentiation action of Nrf2 is mediated by functional AP-1. Our findings suggest that the Nrf2/ARE pathway plays an important part in the cooperative induction of myeloid leukemia cell differentiation by 1,25D and a plant polyphenol.
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Affiliation(s)
- Irene Bobilev
- Department of Clinical Biochemistry, Faculty of Health Sciences, Ben-Gurion University of the Negev, Petakh Tikva, Israel
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Kang JG, Sung HJ, Jawed SI, Brenneman CL, Rao YN, Sher S, Facio FM, Biesecker LG, Quyyumi AA, Sachdev V, Hwang PM. FOS expression in blood as a LDL-independent marker of statin treatment. Atherosclerosis 2010; 212:567-70. [PMID: 20619839 DOI: 10.1016/j.atherosclerosis.2010.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 05/19/2010] [Accepted: 06/08/2010] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The expression of FOS, a gene critical for monocyte and macrophage function, can be inhibited by statins through the disruption of a cholesterol-independent signaling pathway. In this pilot study, we hypothesized that blood FOS mRNA levels will be sensitive to statin treatment independent of LDL cholesterol levels. METHODS Three cohorts at increased risk of or with cardiovascular disease (CVD) were studied. Blood FOS mRNA levels were measured before and after statin treatment or in patients under stable treatment. RESULTS Statin treatment for three months significantly reduced blood FOS mRNA and LDL cholesterol levels. However, in subjects with similar LDL levels achieved by different doses of long term statin treatment, there was an inverse relationship between statin dose and FOS expression. CONCLUSIONS FOS mRNA levels appear to be a sensitive marker of statin treatment that is dissociated from cholesterol levels.
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Affiliation(s)
- Ju-Gyeong Kang
- Translational Medicine Branch, Cardiology Section National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Matsouka P, Mylonas P, Papandoniou E, Dimitropoulou I, Floratou K, Alexandridis T, Kardamakis D. Abdominal radiation initiates apoptotic mechanism in rat femur bone marrow cells in vivo that is reversed by IGF-1 administration. JOURNAL OF RADIATION RESEARCH 2008; 49:41-7. [PMID: 18049035 DOI: 10.1269/jrr.07041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
PURPOSE Radiation induces apoptosis as a result of damage to cellular DNA and RNA. The aim of our work was to study the effect of radiation on rat bone marrow cells (as a neighboring tissue) in the context of a model of experimental radiation enteritis in rats. The effect of systematic administration in irradiated animals of r-IGF-1 and GH was also studied. MATERIALS AND METHODS Wistar type, normal rats, were divided in 4 groups. One control group and the other 3 groups were irradiated in the abdomen. The measured scattered irradiation in the femur ranged from 16.5 to 47.3 cGy. In 2 groups of irradiated animals, rIGF-1 (0.1 microg/g of body weight twice/d) and rGH (0.25 microg/g of body weight /d) were administered. Bone marrow cells were harvested from both femurs. DNA and RNA were analyzed in specific gels. The m-RNA was hybridized for c-fos proto-oncogene expression. RESULTS The calculated low dose of radiation that affected the femurs of the animals induced reduction in bone marrow cell numbers and endonuclease activation manifested by subsequent fragmentation of DNA and RNA. This phenomenon was reversed by rGH and rIGF-1 administration. The c-fos proto-oncogene expression was upregulated by irradiation. CONCLUSION These observations indicate that scattered low dose radiation is capable of initiating apoptosis in rat bone marrow cells and rGH and rIGF-1 administration reverse this process.
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Small GW, Shi YY, Higgins LS, Orlowski RZ. Mitogen-Activated Protein Kinase Phosphatase-1 Is a Mediator of Breast Cancer Chemoresistance. Cancer Res 2007; 67:4459-66. [PMID: 17483361 DOI: 10.1158/0008-5472.can-06-2644] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The mitogen-activated protein kinase (MAPK) phosphatase (MKP)-1 is overexpressed in a large proportion of breast cancers, and in some systems interferes with chemotherapy-mediated proapoptotic signaling through c-Jun-NH2-terminal kinase (JNK). We therefore sought to examine whether MKP-1 is a mediator of breast cancer chemoresistance using A1N4-myc human mammary epithelial cells, and BT-474 and MDA-MB-231 breast carcinoma cells. Transient or stable overexpression of MKP-1 reduced caspase activation and DNA fragmentation while enhancing viability in the face of treatment with alkylating agents (mechlorethamine), anthracylines (doxorubicin), and microtubule inhibitors (paclitaxel). This overexpression was associated with suppression of JNK activation, and JNK blockade alone induced similar effects. In contrast, reduction of MKP-1 levels using a small interfering RNA, or its targeted inactivation, enhanced sensitivity to these drugs, and this was associated with increased JNK activity. Pharmacologic reduction of MKP-1 by pretreatment with a novel p38 MAPK inhibitor, SD-282, suppressed MKP-1 activation by mechlorethamine, enhanced active JNK levels, and increased alkylating agent–mediated apoptosis. Combination treatment with doxorubicin and mechlorethamine had similar effects, and the enhanced efficacy of this regimen was abolished by forced overexpression of MKP-1. These results suggest that the clinical efficacy of combinations of alkylating agents and anthracyclines are due to the ability of the latter to target MKP-1. Moreover, they support the hypothesis that MKP-1 is a significant mediator of breast cancer chemoresistance, and provide a rationale for development and translation of other agents targeting MKP-1 into the clinical arena to overcome resistance and induce chemosensitization. [Cancer Res 2007;67(9):4459–66]
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Affiliation(s)
- George W Small
- The Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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34
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Bai XT, Gu BW, Yin T, Niu C, Xi XD, Zhang J, Chen Z, Chen SJ. Trans-Repressive Effect of NUP98-PMX1 on PMX1-Regulated c-FOSGene through Recruitment of Histone Deacetylase 1 by FG Repeats. Cancer Res 2006; 66:4584-90. [PMID: 16651408 DOI: 10.1158/0008-5472.can-05-3101] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The formation of fusion genes between NUP98 and members of the HOX family represents a critical factor for the genesis of acute leukemia or acute transformation of chronic myeloid leukemia (CML). To gain insights into the molecular mechanisms underlying the leukemogenesis of NUP98-HOX fusion products, we cloned NUP98-PMX1 from a CML-blast crisis patient with t(1;11) as a secondary chromosomal translocation, and functionally studied the fusion products in detail through various molecular and protein biochemical assays. In addition to many interesting features, we have found that the NUP98-PMX1 fusion protein exerts a repressive effect on PMX1 or serum response factor-mediated c-FOS activation, probably through the recruitment of a common corepressor histone deacetylase 1 by FG domains of the NUP98-PMX1 fusion protein. Moreover, we have provided evidence that the FG domains of NUP98-PMX1 and two other NUP98-containing fusion proteins, i.e., NUP98-HOXA9 and NUP98-HOXC11, all exhibit dual binding ability to both CREB binding protein, a coactivator, and histone deacetylase 1, a corepressor. Accordingly, we have hypothesized that this dual binding activity is shared by most, if not all, NUP98-HOX-involved fusion proteins, enabling these fusion proteins to act as both trans-activators and trans-repressors, and contributing to the genesis of acute leukemia or acute transformation of CML.
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MESH Headings
- Binding Sites
- Blast Crisis
- Cell Nucleus/genetics
- Cell Nucleus/metabolism
- Cloning, Molecular
- Gene Expression Regulation, Leukemic
- Genes, fos
- Histone Deacetylase 1
- Histone Deacetylases/metabolism
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Male
- Middle Aged
- Nuclear Pore Complex Proteins/genetics
- Nuclear Pore Complex Proteins/metabolism
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Protein Structure, Tertiary
- Transcriptional Activation
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Affiliation(s)
- Xue-Tao Bai
- State Key Laboratory of Medical Genomics and Shanghai Institute of Hematology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
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Patino WD, Mian OY, Kang JG, Matoba S, Bartlett LD, Holbrook B, Trout HH, Kozloff L, Hwang PM. Circulating transcriptome reveals markers of atherosclerosis. Proc Natl Acad Sci U S A 2005; 102:3423-8. [PMID: 15728378 PMCID: PMC552911 DOI: 10.1073/pnas.0408032102] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Circulating monocytes mediate inflammation in atherosclerosis and may serve as easily accessible reporters of disease. To search for markers of atherosclerosis, we compared the in vivo transcriptomes of monocytes purified from patients undergoing carotid endarterectomy and normal subjects by using the serial analysis of gene expression technique. We selected a subset of differentially expressed monocyte-specific genes and confirmed their expression levels. The Finkel-Biskis-Jinkins osteosarcoma (FOS) gene was significantly increased in patients, and the highest levels of FOS associated with patients who had previously undergone coronary revascularization. The correlation between coronary revascularization and FOS was higher than that compared with the cardiac risk marker high sensitivity C-reactive protein. In vitro inhibition of FOS using small interfering RNA and 3-hydroxy-3-methyl-glutaryl CoA reductase inhibitor simvastatin (statin) affected monocyte activation and suggested an important role in pathogenesis. Given the prominent role of FOS in inflammation and calcification, its association with atherosclerosis severity has clear pathophysiologic bases as well as clinical implications as a marker. Our results suggest that analysis of gene expression in circulating cells may provide biological and clinical insights into human atherosclerosis, and that this type of approach may be applicable for studying other types of diseases.
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Affiliation(s)
- Willmar D Patino
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10-CRC, 5 East, Room 5-5330, 10 Center Drive, Bethesda, MD 20892, USA
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Gery S, Park DJ, Vuong PT, Chih DY, Lemp N, Koeffler HP. Retinoic acid regulates C/EBP homologous protein expression (CHOP), which negatively regulates myeloid target genes. Blood 2004; 104:3911-7. [PMID: 15308577 DOI: 10.1182/blood-2003-10-3688] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Retinoic acid (RA) promotes granulocytic differentiation of normal hematopoietic cells and acute promyelocytic leukemia (APL) blasts by transcriptional modulation of myeloid regulatory genes. In this study, we have identified the C/EBP homologous protein (CHOP) as a novel retinoid-responsive gene using a polymerase chain reaction (PCR)-based cDNA subtraction method. All-trans retinoic acid (ATRA) induced a biphasic expression of CHOP mRNA in the NB4 and HL60 AML cell lines. Levels of CHOP expression increased within 1 hour of exposure to ATRA. ATRA expression became nearly absent between 6 and 24 hours, and a second phase of induction occurred after 48 hours. Retinoid-dependent regulation of CHOP expression was also observed in normal human neutrophils but not in peripheral blood mononuclear cells. In addition, retinoid-dependent regulation of CHOP expression was not observed in retinoid-nonresponsive cell lines HL60R and NB4-R2. CHOP expression was regulated at the transcriptional level and was independent of new protein synthesis. CHOP heterodimerized with C/EBPepsilon and negatively regulated the myeloid-specific gene lactoferrin. Furthermore, CHOP transcriptionally inhibited C/EBPalpha- and C/EBPepsilon-dependent induction of secondary granule gene expression. RA signaling in granulocytic differentiation involves regulated expression of CHOP and C/EBPepsilon in a coordinated fashion.
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Affiliation(s)
- Sigal Gery
- Division of Hematology/Oncology, Cedars-Sinai Medical Center, University of California at Los Angeles, CA 90048, USA.
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Shafarenko M, Amanullah A, Gregory B, Liebermann DA, Hoffman B. Fos modulates myeloid cell survival and differentiation and partially abrogates the c-Myc block in terminal myeloid differentiation. Blood 2004; 103:4259-67. [PMID: 14982872 DOI: 10.1182/blood-2002-09-2704] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Abstract
Previously, we have shown that Fos/Jun transcription factor complexes function as positive modulators of myeloid differentiation. Fos, which is stably induced during normal myeloid differentiation, is not induced upon differentiation of M1 myeloblastic leukemia cells. Establishing M1 cells that express a β-estradiol-conditional FosER chimera, we show that in the absence of the differentiation inducer interleukin-6 (IL-6), Fos expression in M1 myeloblasts promoted apoptotic cell death, entailing cytochrome c release and caspase-9 activation. In contrast, in the presence of IL-6, Fos-mediated apoptosis was abrogated, and Fos promoted terminal differentiation, increasing the sensitivity of M1 cells to be induced for differentiation by IL-6. Fos-mediated apoptosis was accelerated by deregulated c-Myc. Furthermore, restoring Fos expression in M1 partially abrogated the block imparted by deregulated c-Myc on the myeloid differentiation program, increased the sensitivity of the cells to be induced for differentiation, and curtailed their leukemic phenotype. These data provide evidence that Fos/Jun transcription factor complexes play a role in modulating both myeloid cell survival and differentiation and suggest that genetic lesions that alter Fos expression may cooperate with deregulated c-Myc in leukemogenesis. (Blood. 2004;103:4259-4267)
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Affiliation(s)
- Marianna Shafarenko
- Fels Institute for Cancer Research and Molecular Biology, and Department of Biochemistry, Temple University School of Medicine, 3307 N Broad St, Philadelphia, PA 19140, USA
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38
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Rozovskaia T, Ravid-Amir O, Tillib S, Getz G, Feinstein E, Agrawal H, Nagler A, Rappaport EF, Issaeva I, Matsuo Y, Kees UR, Lapidot T, Lo Coco F, Foa R, Mazo A, Nakamura T, Croce CM, Cimino G, Domany E, Canaani E. Expression profiles of acute lymphoblastic and myeloblastic leukemias with ALL-1 rearrangements. Proc Natl Acad Sci U S A 2003; 100:7853-8. [PMID: 12782787 PMCID: PMC164677 DOI: 10.1073/pnas.1132115100] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ALL-1 gene is directly involved in 5-10% of acute lymphoblastic leukemias (ALLs) and acute myeloid leukemias (AMLs) by fusion to other genes or through internal rearrangements. DNA microarrays were used to determine expression profiles of ALLs and AMLs with ALL-1 rearrangements. These profiles distinguish those tumors from other ALLs and AMLs. The expression patterns of ALL-1-associated tumors, in particular ALLs, involve oncogenes, tumor suppressors, antiapoptotic genes, drug-resistance genes, etc., and correlate with the aggressive nature of the tumors. The genes whose expression differentiates between ALLs with and without ALL-1 rearrangement were further divided into several groups, enabling separation of ALL-1-associated ALLs into two subclasses. One of the groups included 43 genes that exhibited expression profiles closely linked to ALLs with ALL-1 rearrangements. Further, there were evident differences between the expression profiles of AMLs in which ALL-1 had undergone fusion to other genes and AMLs with partial duplication of ALL-1. The extensive analysis described here pinpointed genes that might have a direct role in pathogenesis.
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MESH Headings
- Chromosome Aberrations
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 4
- Cluster Analysis
- DNA-Binding Proteins/genetics
- Down-Regulation
- Histone-Lysine N-Methyltransferase
- Humans
- Leukemia, Myeloid, Acute/blood
- Leukemia, Myeloid, Acute/genetics
- Myeloid-Lymphoid Leukemia Protein
- Oligonucleotide Array Sequence Analysis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/blood
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Proto-Oncogenes
- Transcription Factors
- Transcription, Genetic
- Translocation, Genetic
- Up-Regulation
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Affiliation(s)
- T Rozovskaia
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot 76100, Israel
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Feng Z, Li L, Ng PY, Porter AG. Neuronal differentiation and protection from nitric oxide-induced apoptosis require c-Jun-dependent expression of NCAM140. Mol Cell Biol 2002; 22:5357-66. [PMID: 12101231 PMCID: PMC133958 DOI: 10.1128/mcb.22.15.5357-5366.2002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
c-Jun, a crucial component of the dimeric transcription factor activating protein 1 (AP-1), can regulate apoptosis induced by oxidative stress and has been implicated in neuronal differentiation, but the mechanisms are largely unknown. We found that specific inhibition of transcription or stable transfection with cDNA encoding dominant-negative c-Jun sensitized SH-SY5Y neuroblastoma cells (TAM-67 cells) to apoptosis induced by the nitric oxide (NO) donor sodium nitroprusside or SIN-1. TAM-67 cells also became refractory to nerve growth factor (NGF)-induced neuronal differentiation. Dominant-negative c-Jun abolished expression of a 140-kDa neural cell adhesion molecule (NCAM140) and dramatically enhanced the expression of NCAM180 in TAM-67 cells. Inhibition of c-Jun in TAM-67 cells also resulted in a corresponding decrease in the amount of NCAM140 mRNA and an increase in the amount of NCAM180 mRNA. Reexpression of NCAM140 in TAM-67 cells restored NGF-induced neuronal differentiation and resistance to NO-induced apoptosis. Our results show that c-Jun/AP-1, through up-regulation of NCAM140, plays an important role in both NGF-induced neuronal differentiation and resistance to apoptosis induced by NO in neuroblastoma cells. As NCAM140 and NCAM180 are translated from differentially spliced mRNAs transcribed from the same gene, alternative splicing of NCAM pre-mRNA (and consequently the synthesis of the smaller NCAM140 species) appears to be regulated by c-Jun/AP-1.
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Affiliation(s)
- Zhiwei Feng
- Institute of Molecular and Cell Biology, 30 Medical Drive, Singapore 117609, Republic of Singapore
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40
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Hoffmann B, Valerius O, Andermann M, Braus GH. Transcriptional autoregulation and inhibition of mRNA translation of amino acid regulator gene cpcA of filamentous fungus Aspergillus nidulans. Mol Biol Cell 2001; 12:2846-57. [PMID: 11553722 PMCID: PMC59718 DOI: 10.1091/mbc.12.9.2846] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The CPCA protein of the filamentous fungus Aspergillus nidulans is a member of the c-Jun-like transcriptional activator family. It acts as central transcription factor of the cross-pathway regulatory network of amino acid biosynthesis and is functionally exchangeable for the general control transcriptional activator Gcn4p of Saccharomyces cerevisiae. In contrast to GCN4, expression of cpcA is strongly regulated by two equally important mechanisms with additive effects that lead to a fivefold increased CPCA protein amount under amino acid starvation conditions. One component of cpcA regulation involves a transcriptional autoregulatory mechanism via a CPCA recognition element (CPRE) in the cpcA promoter that causes a sevenfold increased cpcA mRNA level when cells are starved for amino acids. Point mutations in the CPRE cause a constitutively low mRNA level of cpcA and a halved protein level when amino acids are limited. Moreover, two upstream open reading frames (uORFs) in the 5' region of the cpcA mRNA are important for a translational regulatory mechanism. Destruction of both short uORFs results in a sixfold increased CPCA protein level under nonstarvation conditions and a 10-fold increase under starvation conditions. Mutations in both the CPRE and uORF regulatory elements lead to an intermediate effect, with a low cpcA mRNA level but a threefold increased CPCA protein level independent of amino acid availability. These data argue for a combined regulation of cpcA that includes a translational regulation like that of yeast GCN4 as well as a transcriptional regulation like that of the mammalian jun and fos genes.
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Affiliation(s)
- B Hoffmann
- Institute of Microbiology and Genetics, Georg-August University, D-37077 Göttingen, Germany
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Young AN, Amin MB, Moreno CS, Lim SD, Cohen C, Petros JA, Marshall FF, Neish AS. Expression profiling of renal epithelial neoplasms: a method for tumor classification and discovery of diagnostic molecular markers. THE AMERICAN JOURNAL OF PATHOLOGY 2001; 158:1639-51. [PMID: 11337362 PMCID: PMC1891957 DOI: 10.1016/s0002-9440(10)64120-x] [Citation(s) in RCA: 252] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The expression patterns of 7075 genes were analyzed in four conventional (clear cell) renal cell carcinomas (RCC), one chromophobe RCC, and two oncocytomas using cDNA microarrays. Expression profiles were compared among tumors using various clustering algorithms, thereby separating the tumors into two categories consistent with corresponding histopathological diagnoses. Specifically, conventional RCCs were distinguished from chromophobe RCC/oncocytomas based on large-scale gene expression patterns. Chromophobe RCC/oncocytomas displayed similar expression profiles, including genes involved with oxidative phosphorylation and genes expressed normally by distal nephron, consistent with the mitochondrion-rich morphology of these tumors and the theory that both lesions are related histogenetically to distal nephron epithelium. Conventional RCCs underexpressed mitochondrial and distal nephron genes, and were further distinguished from chromophobe RCC/oncocytomas by overexpression of vimentin and class II major histocompatibility complex-related molecules. Novel, tumor-specific expression of four genes-vimentin, class II major histocompatibility complex-associated invariant chain (CD74), parvalbumin, and galectin-3-was confirmed in an independent tumor series by immunohistochemistry. Vimentin was a sensitive, specific marker for conventional RCCs, and parvalbumin was detected primarily in chromophobe RCC/oncocytomas. In conclusion, histopathological subtypes of renal epithelial neoplasia were characterized by distinct patterns of gene expression. Expression patterns were useful for identifying novel molecular markers with potential diagnostic utility.
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Affiliation(s)
- A N Young
- Department of Pathology, Emory University School of Medicine, Atlanta, USA
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Torres R, Calle C, Aller P, Mata F. Etoposide stimulates 1,25-dihydroxyvitamin D3 differentiation activity, hormone binding and hormone receptor expression in HL-60 human promyelocytic cells. Mol Cell Biochem 2000; 208:157-62. [PMID: 10939640 DOI: 10.1023/a:1007089632152] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The simultaneous administration of the DNA topoisomerase II inhibitor etoposide (0.15 mM) and 1,25-dihydroxyvitamin D3 (VD3) (10 nM) synergistically induced the differentiation of HL-60 human promyelocytic leukemia cells. Similar results were obtained using U-937 human promonocytic cells, or the topoisomerase II inhibitors doxorubicin (15 nM) and mitoxantrone (2.5 nM). When sequential treatments were used, pre-incubation with VD3 had little effect on the subsequent action of etoposide, while pre-incubation with etoposide greatly potentiated the subsequent action of VD3. In addition, etoposide treatment stimulated VD3 binding activity and increased VD3 receptor mRNA and protein levels. The increase in hormone receptor expression may explain, at least in part, the capacity of topoisomerase inhibitors to potentiate the differentiation inducing activity of VD3.
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Affiliation(s)
- R Torres
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
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von Knethen A, Callsen D, Brüne B. Superoxide Attenuates Macrophage Apoptosis by NF-κB and AP-1 Activation That Promotes Cyclooxygenase-2 Expression. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.163.5.2858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Macrophages are a major source of cytokines and proinflammatory radicals such as superoxide. These mediators can be both produced and utilized by macrophages in autocrine-regulatory pathways. Therefore, we studied the potential role of oxygen radical-regulatory mechanisms in reprogramming macrophage apoptosis. Preactivation of RAW 264.7 cells with a nontoxic dose of the redox cycler 2,3-dimethoxy-1,4-naphtoquinone (5 μM) for 15 h attenuated S-nitrosoglutathione (1 mM)-initiated apoptotic cell death and averted accumulation of the tumor suppressor p53, which is indicative for macrophage apoptosis. Preactivation with superoxide promoted cyclooxygenase-2 induction that was NF-κB and AP-1 mediated. NF-κB activation was confirmed by p50/p65-heterodimer formation, IκB-α degradation, and stimulation of a NF-κB luciferase reporter construct. Furthermore, a NF-κB decoy approach abrogated cyclooxygenase-2 (Cox-2) expression as well as inducible protection. The importance of AP-1 for superoxide-mediated Cox-2 expression and cell protection was substantiated by using the extracellular signal-regulated kinase-inhibitor PD98059 and the p38-inhibitor SB203580, which blocked Cox-2 expression. In corroboration, Cox-2 expression was hindered by a dominant-negative c-jun mutant (TAM67). Protection from apoptosis was verified in human macrophages with the notion that superoxide promoted Cox-2 expression, which in turn attenuated nitric oxide-evoked caspase activation. We conclude that the sublethal generation of oxygen radicals reprograms macrophages by NF-κB and AP-1 activation. The resulting hyporesponsiveness reveals an attenuated apoptotic program in association with Cox-2 expression.
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Affiliation(s)
- Andreas von Knethen
- Department of Medicine IV, Experimental Division, Faculty of Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Dagmar Callsen
- Department of Medicine IV, Experimental Division, Faculty of Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Bernhard Brüne
- Department of Medicine IV, Experimental Division, Faculty of Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
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