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Xie X, Gu H, Ma J, Fu L, Ma J, Zhang J, Wu R, Chen Z. FOXO1 Single-Nucleotide Polymorphisms Are Associated with Bleeding Severity and Sensitivity of Glucocorticoid Treatment of Pediatric Immune Thrombocytopenia. DNA Cell Biol 2024; 43:279-287. [PMID: 38683649 DOI: 10.1089/dna.2023.0431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024] Open
Abstract
Immune thrombocytopenia (ITP) is an autoimmune-mediated hemorrhagic disease. Emerging evidence indicates that FOXO1 SNPs are related to the immune dysregulation of several autoimmune diseases suggesting that FOXO1 may be involved in inflammation and pathologic activities in patients with ITP. This study aimed to evaluate whether FOXO1 gene single-nucleotide polymorphisms (SNPs) are associated with susceptibility to ITP and clinical priorities of concern include bleeding severity and sensitivity of glucocorticoid treatment. This study recruited 327 newly diagnosed ITP and 220 healthy controls. Four SNPs (rs17446593, rs17446614, rs2721068, and rs2721068) of the FOXO1 gene were detected using the Sequenom MassArray system. Bleeding severity were classified into the mild and severe groups based on the bleeding scores. ITP patients were classified as sensitive and insensitive to glucocorticoid treatment according to the practice guideline for ITP (2019 version). The frequencies of the four SNPs did not show any significant differences between the ITP and healthy control groups. Patients with AA genotype at rs17446593 (p = 0.009) and GG genotype at rs17446614 (p = 0.009) suffered more severe bleeding than patients without them. Carriers of haplotype Grs17446593Ars17446614Crs2721068Trs2755213 were protective to severe bleeding (p = 0.002). The AA genotype at rs17446593 was significantly higher in ITP patients sensitive to glucocorticoid treatment than in those insensitive to glucocorticoid treatment (p = 0.03). Haplotype Grs17446593Grs17446614Trs2721068Trs2755213 increases the risk of glucocorticoid resistance (p = 0.007). Although FOXO1 gene polymorphisms were not associated with susceptibility to ITP, the AA genotype at rs17446593 and GG genotype at rs17446614 were associated with bleeding severity. Haplotype GACT have a protective effect against severe bleeding. Patients with AA genotype at rs17446593 may tend to have good responds to glucocorticoid treatment. However, the FOXO1 gene haplotype GGTT increases the risk of glucocorticoid-resistant. Trial registration: ChiCTR1900022419.
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Affiliation(s)
- Xingjuan Xie
- Hematologic Disease Laboratory, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University); Key Laboratory of Major Diseases in Children, Ministry of Education; Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Hao Gu
- Hematologic Disease Laboratory, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University); Key Laboratory of Major Diseases in Children, Ministry of Education; Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
- Department of Immunology, Ministry of Education Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jingyao Ma
- Department of Hematology, Beijing Key Laboratory of Pediatric Hematology Oncology; Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Lingling Fu
- Department of Hematology, Beijing Key Laboratory of Pediatric Hematology Oncology; Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jie Ma
- Department of Hematology, Beijing Key Laboratory of Pediatric Hematology Oncology; Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jialu Zhang
- Department of Hematology, Beijing Key Laboratory of Pediatric Hematology Oncology; Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Runhui Wu
- Department of Hematology, Beijing Key Laboratory of Pediatric Hematology Oncology; Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Zhenping Chen
- Hematologic Disease Laboratory, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University); Key Laboratory of Major Diseases in Children, Ministry of Education; Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
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DNA methylation at birth in monozygotic twins discordant for pediatric acute lymphoblastic leukemia. Nat Commun 2022; 13:6077. [PMID: 36241624 PMCID: PMC9568651 DOI: 10.1038/s41467-022-33677-z] [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: 10/08/2021] [Accepted: 09/28/2022] [Indexed: 01/11/2023] Open
Abstract
Aberrant DNA methylation constitutes a key feature of pediatric acute lymphoblastic leukemia at diagnosis, however its role as a predisposing or early contributor to leukemia development remains unknown. Here, we evaluate DNA methylation at birth in 41 leukemia-discordant monozygotic twin pairs using the Illumina EPIC array on archived neonatal blood spots to identify epigenetic variation associated with development of pediatric acute lymphoblastic leukemia, independent of genetic influence. Through conditional logistic regression we identify 240 significant probes and 10 regions associated with the discordant onset of leukemia. We identify a significant negative coefficient bias, indicating DNA hypomethylation in cases, across the array and enhanced in open sea, shelf/shore, and gene body regions compared to promoter and CpG island regions. Here, we show an association between global DNA hypomethylation and future development of pediatric acute lymphoblastic leukemia across disease-discordant genetically identical twins, implying DNA hypomethylation may contribute more generally to leukemia risk.
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DNA Methylation Is Correlated with Oxidative Stress in Myelodysplastic Syndrome-Relevance as Complementary Prognostic Biomarkers. Cancers (Basel) 2021; 13:cancers13133138. [PMID: 34201739 PMCID: PMC8268426 DOI: 10.3390/cancers13133138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary Myelodysplastic syndrome (MDS) is a hematological malignancy with a high propensity to evolve to acute myeloid leukemia. Oxidative stress and abnormal DNA methylation are important in this neoplasia’s development and progression. We investigate whether oxidative stress parameters were correlated with localized and global DNA methylations in the peripheral blood of patients with MDS. We found that oxidative stress was positively correlated with DNA methylation and associated with worse overall survival. Biologically, these facts suggest a relationship between oxidative stress and DNA methylation, two common pathogenic mechanisms involved in MDS. Clinically, our findings can improve an MDS patient’s management if used as complementary prognostic biomarkers. Abstract Oxidative stress and abnormal DNA methylation have been implicated in cancer, including myelodysplastic syndromes (MDSs). This fact leads us to investigate whether oxidative stress is correlated with localized and global DNA methylations in the peripheral blood of MDS patients. Sixty-six MDS patients and 26 healthy individuals were analyzed. Several oxidative stress and macromolecule damage parameters were analyzed. Localized (gene promotor) and global DNA methylations (5-mC and 5-hmC levels; LINE-1 methylation) were assessed. MDS patients had lower levels of reduced glutathione and total antioxidant status (TAS) and higher levels of peroxides, nitric oxide, peroxides/TAS, and 8-hydroxy-2-deoxyguanosine compared with controls. These patients had higher 5-mC levels and lower 5-hmC/5-mC ratio and LINE-1 methylation and increased methylation frequency of at least one methylated gene. Peroxide levels and peroxide/TAS ratio were higher in patients with methylated genes than those without methylation and negatively correlated with LINE-1 methylation and positively with 5-mC levels. The 5-hmC/5-mC ratio was significantly associated with progression to acute leukemia and peroxide/TAS ratio with overall survival. This study points to a relationship between oxidative stress and DNA methylation, two common pathogenic mechanisms involved in MDS, and suggests the relevance of 5-hmC/5-mC and peroxide/TAS ratios as complementary prognostic biomarkers.
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Combined Application of Pan-AKT Inhibitor MK-2206 and BCL-2 Antagonist Venetoclax in B-Cell Precursor Acute Lymphoblastic Leukemia. Int J Mol Sci 2021; 22:ijms22052771. [PMID: 33803402 PMCID: PMC7967241 DOI: 10.3390/ijms22052771] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/05/2021] [Accepted: 03/06/2021] [Indexed: 12/12/2022] Open
Abstract
Aberrant PI3K/AKT signaling is a hallmark of acute B-lymphoblastic leukemia (B-ALL) resulting in increased tumor cell proliferation and apoptosis deficiency. While previous AKT inhibitors struggled with selectivity, MK-2206 promises meticulous pan-AKT targeting with proven anti-tumor activity. We herein, characterize the effect of MK-2206 on B-ALL cell lines and primary samples and investigate potential synergistic effects with BCL-2 inhibitor venetoclax to overcome limitations in apoptosis induction. MK-2206 incubation reduced AKT phosphorylation and influenced downstream signaling activity. Interestingly, after MK-2206 mono application tumor cell proliferation and metabolic activity were diminished significantly independently of basal AKT phosphorylation. Morphological changes but no induction of apoptosis was detected in the observed cell lines. In contrast, primary samples cultivated in a protective microenvironment showed a decrease in vital cells. Combined MK-2206 and venetoclax incubation resulted in partially synergistic anti-proliferative effects independently of application sequence in SEM and RS4;11 cell lines. Venetoclax-mediated apoptosis was not intensified by addition of MK-2206. Functional assessment of BCL-2 inhibition via Bax translocation assay revealed slightly increased pro-apoptotic signaling after combined MK-2206 and venetoclax incubation. In summary, we demonstrate that the pan-AKT inhibitor MK-2206 potently blocks B-ALL cell proliferation and for the first time characterize the synergistic effect of combined MK-2206 and venetoclax treatment in B-ALL.
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Rusetska N, Kober P, Król SK, Boresowicz J, Maksymowicz M, Kunicki J, Bonicki W, Bujko M. Invasive and Noninvasive Nonfunctioning Gonadotroph Pituitary Tumors Differ in DNA Methylation Level of LINE-1 Repetitive Elements. J Clin Med 2021; 10:560. [PMID: 33546126 PMCID: PMC7913198 DOI: 10.3390/jcm10040560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/11/2022] Open
Abstract
PURPOSE Epigenetic dysregulation plays a role in pituitary tumor pathogenesis. Some differences in DNA methylation were observed between invasive and noninvasive nonfunctioning gonadotroph tumors. This study sought to determine the role of DNA methylation changes in repetitive LINE-1 elements in nonfunctioning gonadotroph pituitary tumors. METHODS We investigated LINE-1 methylation levels in 80 tumors and normal pituitary glands with bisulfite-pyrosequencing. Expression of two LINE-1 open reading frames (L1-ORF1 and L1-ORF2) was analyzed with qRT-PCR in tumor samples and mouse gonadotroph pituitary cells treated with DNA methyltransferase inhibitor. Immunohistochemical staining against L1-ORF1p was also performed in normal pituitary glands and tumors. RESULTS Hypomethylation of LINE-1 was observed in pituitary tumors. Tumors characterized by invasive growth revealed lower LINE-1 methylation level than noninvasive ones. LINE-1 methylation correlated with overall DNA methylation assessed with HM450K arrays and negatively correlated with L1-ORF1 and L1-ORF2 expression. Treatment of αT3-1 gonadotroph cells with 5-Azacytidine clearly increased the level of L1-ORF1 and L1-ORF2 mRNA; however, its effect on LβT2 cells was less pronounced. Immunoreactivity against L1-ORF1p was higher in tumors than normal tissue. No difference in L1-ORF1p expression was observed in invasive and noninvasive tumors. CONCLUSION Hypomethylation of LINE-1 is related to invasive growth and influences transcriptional activity of transposable elements.
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Affiliation(s)
- Natalia Rusetska
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (N.R.); (P.K.); (S.K.K.); (J.B.)
| | - Paulina Kober
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (N.R.); (P.K.); (S.K.K.); (J.B.)
| | - Sylwia Katarzyna Król
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (N.R.); (P.K.); (S.K.K.); (J.B.)
| | - Joanna Boresowicz
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (N.R.); (P.K.); (S.K.K.); (J.B.)
| | - Maria Maksymowicz
- Department of Pathology and Laboratory Diagnostics, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland;
| | - Jacek Kunicki
- Department of Neurosurgery, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (J.K.); (W.B.)
| | - Wiesław Bonicki
- Department of Neurosurgery, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (J.K.); (W.B.)
| | - Mateusz Bujko
- Department of Molecular and Translational Oncology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (N.R.); (P.K.); (S.K.K.); (J.B.)
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Karalexi MA, Dessypris N, Ma X, Spector LG, Marcotte E, Clavel J, Pombo-de-Oliveira MS, Heck JE, Roman E, Mueller BA, Hansen J, Auvinen A, Lee PC, Schüz J, Magnani C, Mora AM, Dockerty JD, Scheurer ME, Wang R, Bonaventure A, Kane E, Doody DR, Erdmann F, Kang AY, Metayer C, Milne E, Petridou ET. Age-, sex- and disease subtype-related foetal growth differentials in childhood acute myeloid leukaemia risk: A Childhood Leukemia International Consortium analysis. Eur J Cancer 2020; 130:1-11. [PMID: 32163883 DOI: 10.1016/j.ejca.2020.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 12/18/2019] [Accepted: 01/14/2020] [Indexed: 02/01/2023]
Abstract
AIM Evidence for an association of foetal growth with acute myeloid leukaemia (AML) is inconclusive. AML is a rare childhood cancer, relatively more frequent in girls, with distinct features in infancy. In the context of the Childhood Leukemia International Consortium (CLIC), we examined the hypothesis that the association may vary by age, sex and disease subtype using data from 22 studies and a total of 3564 AML cases. METHODS Pooled estimates by age, sex and overall for harmonised foetal growth markers in association with AML were calculated using the International Fetal and Newborn Growth Consortium for the 21st Century Project for 17 studies contributing individual-level data; meta-analyses were, thereafter, conducted with estimates provided ad hoc by five more studies because of administrative constraints. Subanalyses by AML subtype were also performed. RESULTS A nearly 50% increased risk was observed among large-for-gestational-age infant boys (odds ratio [OR]: 1.49, 95% confidence interval [CI]: 1.03-2.14), reduced to 34% in boys aged <2 years (OR: 1.34, 95% CI: 1.05-1.71) and 25% in boys aged 0-14 years (OR: 1.25, 95% CI: 1.06-1.46). The association of large for gestational age became stronger in boys with M0/M1subtype (OR: 1.80, 95% CI: 1.15-2.83). Large birth length for gestational age was also positively associated with AML (OR: 1.38, 95% CI: 1.00-1.92) in boys. By contrast, there were null associations in girls, as well as with respect to associations of decelerated foetal growth markers. CONCLUSIONS Accelerated foetal growth was associated with AML, especially in infant boys and those with minimally differentiated leukaemia. Further cytogenetic research would shed light into the underlying mechanisms.
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Affiliation(s)
- Maria A Karalexi
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nick Dessypris
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Xiaomei Ma
- Department of Chronic Disease Epidemiology, Yale School of Public Health, Cancer Prevention and Control, Yale Comprehensive Cancer Centre, Yale School of Medicine, CT, USA
| | - Logan G Spector
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Erin Marcotte
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Jacqueline Clavel
- CRESS, UMR-S1153, INSERM, Paris-Descartes University, Villejuif, France; National Registry of Childhood Cancers, APHP, Hôpital Paul-Brousse, CHU de Nancy, France
| | | | - Julia E Heck
- Department of Epidemiology, School of Public Health, University of California, Los Angeles, CA, USA
| | - Eve Roman
- Epidemiology and Cancer Statistics Group, Department of Health Sciences, University of York, Heslington, York, United Kingdom
| | - Beth A Mueller
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA; Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA
| | - Johnni Hansen
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anssi Auvinen
- Faculty of Social Sciences, University of Tampere, Tampere, Finland
| | - Pei-Chen Lee
- Department of Health Care Management, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
| | - Joachim Schüz
- International Agency for Research on Cancer (IARC), Section of Environment and Radiation, Lyon, France
| | - Corrado Magnani
- Cancer Epidemiology Unit, Department of Translational Medicine, CPO Piedmont and University of Eastern Piedmont, Novara, Italy
| | - Ana M Mora
- Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional, Heredia, Costa Rica
| | - John D Dockerty
- Department of Preventative and Social Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Michael E Scheurer
- Baylor College of Medicine, Department of Pediatrics Texas Children's Cancer Center, TX, USA
| | - Rong Wang
- Department of Chronic Disease Epidemiology, Yale School of Public Health, Cancer Prevention and Control, Yale Comprehensive Cancer Centre, Yale School of Medicine, CT, USA
| | | | - Eleanor Kane
- Epidemiology and Cancer Statistics Group, Department of Health Sciences, University of York, Heslington, York, United Kingdom
| | - David R Doody
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Friederike Erdmann
- International Agency for Research on Cancer (IARC), Section of Environment and Radiation, Lyon, France; Danish Cancer Society Research Center, Childhood Cancer Research Group, Copenhagen, Denmark
| | - Alice Y Kang
- School of Public Health, University of California, Berkeley, CA, USA
| | - Catherine Metayer
- School of Public Health, University of California, Berkeley, CA, USA
| | - Elizabeth Milne
- Telethon Institute for Child Health Research, Center for Child Health Research, University of Western Australia, WA, Australia
| | - Eleni Th Petridou
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Clinical Epidemiology Unit, Department of Medicine, Karolinska Institute, Stockholm, Sweden.
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Wang H, Tong Z, Li J, Xiao K, Ren F, Xie L. Genetic variants in Forkhead box O1 associated with predisposition to sepsis in a Chinese Han population. BMC Infect Dis 2019; 19:781. [PMID: 31492105 PMCID: PMC6731606 DOI: 10.1186/s12879-019-4330-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 07/29/2019] [Indexed: 12/02/2022] Open
Abstract
Background Genetic variant is one of the causes of sepsis patients’ mortality. Now, many studies have identified several SNPs related to sepsis. However, none of these studies were identified in a genome-wide way. We aimed to detect genetic polymorphisms of sepsis patients. Methods The blood samples of eight normal controls and ten sepsis patients were collected for whole exome sequencing. Then, Single Nucleotide Polymorphisms (SNPs) were selected according to quality score and number of sepsis patients who had this variants. Synonymous mutations were removed. Genes including these remaining variants were used for functional analyses. After analyses, the remaining SNPs and indels were validated in 149 normal controls and 156 sepsis patients. Finally, serum levels of proteins coded by genes including these SNPs were evaluated. Results After whole exome sequencing, 97 SNPs and one indel site were left. Then, functional screening was performed. Only seven SNPs were used for further validation. As a result, the rs2721068 in dominant model and rs17446614 in recessive model were associated with sepsis, and the ORs of these two SNPs were 3.24 (95%CI, 1.25, 8.44) and 0.47 (0.026, 0.88), respectively. These two SNPs were both located in Forkhead box O1 (FOXO1) gene. For rs2721068 (T/T, T/C-C/C) and rs17446614 (A/A-A/G, G/G), serum levels of foxo1 in sepsis patients were both significantly lower in normal controls. Conclusions We firstly reported that the rs2721068 and rs17446614 were correlated to genetic predisposition to sepsis. Electronic supplementary material The online version of this article (10.1186/s12879-019-4330-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Huijuan Wang
- Department of Respiratory Medicine, Chinese PLA General Hospital, 28th Fuxing Road, Beijing, 100853, China.,Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Beijing Institute of Respiratory Medicine, Capital Medical University, Beijing, 100020, China
| | - Zhaohui Tong
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Beijing Institute of Respiratory Medicine, Capital Medical University, Beijing, 100020, China
| | - Jia Li
- Department of Nanlou Respiratory Medicine, Chinese PLA General Hospital, 28th Fuxing Road, Beijing, 100853, China
| | - Kun Xiao
- Department of Respiratory Medicine, Chinese PLA General Hospital, 28th Fuxing Road, Beijing, 100853, China
| | - Feifei Ren
- Department of Respiratory Medicine, Chinese PLA General Hospital, 28th Fuxing Road, Beijing, 100853, China
| | - Lixin Xie
- Department of Respiratory Medicine, Chinese PLA General Hospital, 28th Fuxing Road, Beijing, 100853, China.
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Richter A, Roolf C, Hamed M, Gladbach YS, Sender S, Konkolefski C, Knübel G, Sekora A, Fuellen G, Vollmar B, Murua Escobar H, Junghanss C. Combined Casein Kinase II inhibition and epigenetic modulation in acute B-lymphoblastic leukemia. BMC Cancer 2019; 19:202. [PMID: 30841886 PMCID: PMC6404304 DOI: 10.1186/s12885-019-5411-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/26/2019] [Indexed: 02/06/2023] Open
Abstract
Background The tumor suppressor protein phosphatase and tensin homolog (PTEN) is a key regulator of the PI3K/AKT pathway which is frequently altered in a variety of tumors including a subset of acute B-lymphoblastic leukemias (B-ALL). While PTEN mutations and deletions are rare in B-ALL, promoter hypermethylation and posttranslational modifications are the main pathways of PTEN inactivation. Casein Kinase II (CK2) is often upregulated in B-ALL and phosphorylates both PTEN and DNA methyltransferase 3A, resulting in increased PI3K/AKT signaling and offering a potential mechanism for further regulation of tumor-related pathways. Methods Here, we evaluated the effects of CK2 inhibitor CX-4945 alone and in combination with hypomethylating agent decitabine on B-ALL proliferation and PI3K/AKT pathway activation. We further investigated if CX-4945 intensified decitabine-induced hypomethylation and identified aberrantly methylated biological processes after CK2 inhibition. In vivo tumor cell proliferation in cell line and patient derived xenografts was assessed by longitudinal full body bioluminescence imaging and peripheral blood flow cytometry of NSG mice. Results CX-4945 incubation resulted in CK2 inhibition and PI3K pathway downregulation thereby inducing apoptosis and anti-proliferative effects. CX-4945 further affected methylation patterns of tumor-related transcription factors and regulators of cellular metabolism. No overlap with decitabine-affected genes or processes was detected. Decitabine alone revealed only modest anti-proliferative effects on B-ALL cell lines, however, if combined with CX-4945 a synergistic inhibition was observed. In vivo assessment of CX-4945 in B-ALL cell line xenografts resulted in delayed proliferation of B-ALL cells. Combination with DEC further decelerated B-ALL expansion significantly and decreased infiltration in bone marrow and spleen. Effects in patient-derived xenografts all harboring a t(4;11) translocation were heterogeneous. Conclusions We herein demonstrate the anti-leukemic potential of CX-4945 in synergy with decitabine in vitro as well as in vivo identifying CK2 as a potentially targetable kinase in B-ALL. Electronic supplementary material The online version of this article (10.1186/s12885-019-5411-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anna Richter
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Catrin Roolf
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Mohamed Hamed
- Institute for Biostatistics and Informatics in Medicine and Ageing, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057, Rostock, Germany
| | - Yvonne Saara Gladbach
- Institute for Biostatistics and Informatics in Medicine and Ageing, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057, Rostock, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany.,Division of Applied Bioinformatics, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT) Heidelberg, Heidelberg, Germany
| | - Sina Sender
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Christoph Konkolefski
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Gudrun Knübel
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Anett Sekora
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Georg Fuellen
- Institute for Biostatistics and Informatics in Medicine and Ageing, Rostock University Medical Center, Ernst-Heydemann-Straße 8, 18057, Rostock, Germany
| | - Brigitte Vollmar
- Small Animal Imaging Core Facility, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany
| | - Hugo Murua Escobar
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Christian Junghanss
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany.
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Ramos KN, Ramos IN, Zeng Y, Ramos KS. Genetics and epigenetics of pediatric leukemia in the era of precision medicine. F1000Res 2018; 7. [PMID: 30079227 PMCID: PMC6053694 DOI: 10.12688/f1000research.14634.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/11/2018] [Indexed: 01/06/2023] Open
Abstract
Pediatric leukemia represents a heterogeneous group of diseases characterized by germline and somatic mutations that manifest within the context of disturbances in the epigenetic machinery and genetic regulation. Advances in genomic medicine have allowed finer resolution of genetic and epigenetic strategies that can be effectively used to risk-stratify patients and identify novel targets for therapy. This review discusses the genetic and epigenetic mechanisms of leukemogenesis, particularly as it relates to acute lymphocytic leukemias, the mechanisms of epigenetic control of leukemogenesis, namely DNA methylation, histone modifications, microRNAs, and LINE-1 retroelements, and highlights opportunities for precision medicine therapeutics in further guiding disease management. Future efforts to broaden the integration of advances in genomic and epigenomic science into the practice of pediatric oncology will not only identify novel therapeutic strategies to improve clinical outcomes but also improve the quality of life for this unique patient population. Recent findings in precision therapeutics of acute lymphocytic leukemias over the past three years, along with some provocative areas of epigenetics research, are reviewed here.
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Affiliation(s)
- Kristie N Ramos
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Arizona College of Medicine-Tucson, Tucson, USA
| | - Irma N Ramos
- Department of Promotion Health Sciences, University of Arizona Mel and Enid Zucherman College of Public Health, Tucson, USA
| | - Yi Zeng
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, University of Arizona College of Medicine-Tucson, Tucson, USA.,University of Arizona Cancer Center, Tucson, USA
| | - Kenneth S Ramos
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Arizona College of Medicine-Tucson, Tucson, USA.,University of Arizona Cancer Center, Tucson, USA.,Department of Medicine, Division of Clinical Support and Data Analytics, University of Arizona College of Medicine-Phoenix, Phoenix, USA
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10
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Miousse IR, Kutanzi KR, Koturbash I. Effects of ionizing radiation on DNA methylation: from experimental biology to clinical applications. Int J Radiat Biol 2017; 93:457-469. [PMID: 28134023 PMCID: PMC5411327 DOI: 10.1080/09553002.2017.1287454] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE Ionizing radiation (IR) is a ubiquitous environmental stressor with genotoxic and epigenotoxic capabilities. Terrestrial IR, predominantly a low-linear energy transfer (LET) radiation, is being widely utilized in medicine, as well as in multiple industrial applications. Additionally, an interest in understanding the effects of high-LET irradiation is emerging due to the potential of exposure during space missions and the growing utilization of high-LET radiation in medicine. CONCLUSIONS In this review, we summarize the current knowledge of the effects of IR on DNA methylation, a key epigenetic mechanism regulating the expression of genetic information. We discuss global, repetitive elements and gene-specific DNA methylation in light of exposure to high and low doses of high- or low-LET IR, fractionated IR exposure, and bystander effects. Finally, we describe the mechanisms of IR-induced alterations to DNA methylation and discuss ways in which that understanding can be applied clinically, including utilization of DNA methylation as a predictor of response to radiotherapy and in the manipulation of DNA methylation patterns for tumor radiosensitization.
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Affiliation(s)
- Isabelle R Miousse
- a Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health , University of Arkansas for Medical Sciences , Little Rock , AR , USA
| | - Kristy R Kutanzi
- a Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health , University of Arkansas for Medical Sciences , Little Rock , AR , USA
| | - Igor Koturbash
- a Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health , University of Arkansas for Medical Sciences , Little Rock , AR , USA
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11
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Liu Y, Sun L, Fong P, Yang J, Zhang Z, Yin S, Jiang S, Liu X, Ju H, Huang L, Bai J, Gong K, Yan S, Zhang C, Shao G. An association between overexpression of DNA methyltransferase 3B4 and clear cell renal cell carcinoma. Oncotarget 2017; 8:19712-19722. [PMID: 28160561 PMCID: PMC5386716 DOI: 10.18632/oncotarget.14966] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 01/03/2017] [Indexed: 12/20/2022] Open
Abstract
It is well known that abnormal DNA methylations occur frequently in kidney cancer. However, it remains unclear exactly which types of DNA methyltransferases (DNMT) contribute to the pathologies of kidney cancers. In order to determine the functions of DNA methyltransferase in kidney tumorigenesis on the molecular level, we examined the mRNA expression levels of DNMT1, DNMT3A, DNMT3B, and DNMT3B variants in renal cell carcinoma tissue. Both mRNA and protein levels of DNMT3B4, a splice variant of DNMT3B, were increased in renal cell carcinoma tissue compared with adjacent control tissues. Additionally, Alu elements and long interspersed nuclear elements (LINE-1) were hypomethylated in renal cell carcinoma tissue. Meanwhile, methylation of the promoter for RASSF1A, a tumor suppressor gene, was moderately increased in renal cell carcinoma tissue, while RASSF1A expression was decreased. Thus, our data suggest that the overexpression of DNMT3B4 may play an important role in human kidney tumorigenesis through chromosomal instability and methylation of RASSF1A.
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Affiliation(s)
- You Liu
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Liantao Sun
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Peter Fong
- Department of Neurology, University of California San Francisco, San Francisco, CA, USA
| | - Jie Yang
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Zhuxia Zhang
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Shuihui Yin
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Shuyuan Jiang
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Xiaolei Liu
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Hongge Ju
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Lihua Huang
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Jing Bai
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Kerui Gong
- Department of Oral and Maxillofacial Surgery, University of California San Francsico, San Francisco, CA, USA
| | - Shaochun Yan
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
| | - Chunyang Zhang
- Department of Neurology, First Affiliated Hospital of Baotou Medical College, Inner Mongolia, PRC
| | - Guo Shao
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Inner Mongolia, PRC
- Institute for Hypoxia Medicine, Capital Medical University, Beijing, PRC
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12
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Liu J, Xie K, Chen W, Zhu M, Shen W, Yuan J, Cheng Y, Geng L, Wang Y, Li Z, Zhang J, Jin G, Dai J, Ma H, Du J, Wang M, Zhang Z, Hu Z, Wu T, Shen H. Genetic variants, PM2.5 exposure level and global DNA methylation level: A multi-center population-based study in Chinese. Toxicol Lett 2017; 269:77-82. [DOI: 10.1016/j.toxlet.2017.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 01/31/2017] [Accepted: 02/05/2017] [Indexed: 01/08/2023]
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13
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Prada-Arismendy J, Arroyave JC, Röthlisberger S. Molecular biomarkers in acute myeloid leukemia. Blood Rev 2016; 31:63-76. [PMID: 27639498 DOI: 10.1016/j.blre.2016.08.005] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 08/24/2016] [Accepted: 08/26/2016] [Indexed: 12/11/2022]
Abstract
Acute myeloid leukemia (AML) is the most common acute leukemia in adults. The pathophysiology of this disease is just beginning to be understood at the cellular and molecular level, and currently cytogenetic markers are the most important for risk stratification and treatment of AML patients. However, with the advent of new technologies, the detection of other molecular markers such as point mutations and characterization of epigenetic and proteomic profiles, have begun to play an important role in how the disease is approached. Recent evidence shows that the identification of new AML biomarkers contributes to a better understanding of the molecular basis of the disease, is significantly useful in screening, diagnosis, prognosis and monitoring of AML, as well as the possibility of predicting each individual's response to treatment. This review summarizes the most relevant molecular (genetic, epigenetic, and protein) biomarkers associated with acute myeloid leukemia and discusses their clinical importance in terms of risk prediction, diagnosis and prognosis.
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MESH Headings
- Biomarkers, Tumor
- DNA Methylation
- Disease Susceptibility
- Epigenesis, Genetic
- Genetic Variation
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/mortality
- Mutation
- Prognosis
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Affiliation(s)
- Jeanette Prada-Arismendy
- Grupo de Investigación e Innovación Biomédica, Instituto Tecnológico Metropolitano, Medellín, Colombia.
| | - Johanna C Arroyave
- Grupo de Investigación e Innovación Biomédica, Instituto Tecnológico Metropolitano, Medellín, Colombia
| | - Sarah Röthlisberger
- Grupo de Investigación e Innovación Biomédica, Instituto Tecnológico Metropolitano, Medellín, Colombia
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14
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Bronzini I, Aresu L, Paganin M, Marchioretto L, Comazzi S, Cian F, Riondato F, Marconato L, Martini V, Te Kronnie G. DNA methylation and targeted sequencing of methyltransferases family genes in canine acute myeloid leukaemia, modelling human myeloid leukaemia. Vet Comp Oncol 2016; 15:910-918. [PMID: 27098563 DOI: 10.1111/vco.12231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 02/11/2016] [Accepted: 03/11/2016] [Indexed: 01/13/2023]
Abstract
Tumours shows aberrant DNA methylation patterns, being hypermethylated or hypomethylated compared with normal tissues. In human acute myeloid leukaemia (hAML) mutations in DNA methyltransferase (DNMT3A) are associated to a more aggressive tumour behaviour. As AML is lethal in dogs, we defined global DNA methylation content, and screened the C-terminal domain of DNMT3 family of genes for sequence variants in 39 canine acute myeloid leukaemia (cAML) cases. A heterogeneous pattern of DNA methylation was found among cAML samples, with subsets of cases being hypermethylated or hypomethylated compared with healthy controls; four recurrent single nucleotide variations (SNVs) were found in DNMT3L gene. Although SNVs were not directly correlated to whole genome DNA methylation levels, all hypomethylated cAML cases were homozygous for the deleterious mutation at p.Arg222Trp. This study contributes to understand genetic modifications of cAML, leading up to studies that will elucidate the role of methylome alterations in the pathogenesis of AML in dogs.
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Affiliation(s)
- I Bronzini
- Oncohematology Laboratory, Department of Women's and Children's Health, University of Padova, Padova, Italy
| | - L Aresu
- Department of Comparative Biomedicine and Food Science, University of Padova, Padova, Italy
| | - M Paganin
- Oncohematology Laboratory, Department of Women's and Children's Health, University of Padova, Padova, Italy
| | - L Marchioretto
- Department of Cellular Biotechnology and Hematology, Sapienza University of Rome, Rome, Italy
| | - S Comazzi
- Department of Veterinary Science and Public Health, University of Milan, Milano, Italy
| | - F Cian
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - F Riondato
- Department of Veterinary Sciences, University of Turin, Turin, Italy
| | - L Marconato
- Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy
| | - V Martini
- Department of Veterinary Science and Public Health, University of Milan, Milano, Italy
| | - G Te Kronnie
- Oncohematology Laboratory, Department of Women's and Children's Health, University of Padova, Padova, Italy
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15
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Kurdyukov S, Bullock M. DNA Methylation Analysis: Choosing the Right Method. BIOLOGY 2016; 5:biology5010003. [PMID: 26751487 PMCID: PMC4810160 DOI: 10.3390/biology5010003] [Citation(s) in RCA: 343] [Impact Index Per Article: 42.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 12/16/2015] [Accepted: 12/22/2015] [Indexed: 01/10/2023]
Abstract
In the burgeoning field of epigenetics, there are several methods available to determine the methylation status of DNA samples. However, choosing the method that is best suited to answering a particular biological question still proves to be a difficult task. This review aims to provide biologists, particularly those new to the field of epigenetics, with a simple algorithm to help guide them in the selection of the most appropriate assay to meet their research needs. First of all, we have separated all methods into two categories: those that are used for: (1) the discovery of unknown epigenetic changes; and (2) the assessment of DNA methylation within particular regulatory regions/genes of interest. The techniques are then scrutinized and ranked according to their robustness, high throughput capabilities and cost. This review includes the majority of methods available to date, but with a particular focus on commercially available kits or other simple and straightforward solutions that have proven to be useful.
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Affiliation(s)
- Sergey Kurdyukov
- Genomics Core facility, Kolling Institute of Medical Research, University of Sydney, Sydney 2065, Australia.
| | - Martyn Bullock
- Cancer Genetics Laboratory, Kolling Institute of Medical Research, University of Sydney, Sydney 2065, Australia.
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16
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Miousse IR, Chalbot MCG, Lumen A, Ferguson A, Kavouras IG, Koturbash I. Response of transposable elements to environmental stressors. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2015; 765:19-39. [PMID: 26281766 PMCID: PMC4544780 DOI: 10.1016/j.mrrev.2015.05.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 12/21/2022]
Abstract
Transposable elements (TEs) comprise a group of repetitive sequences that bring positive, negative, as well as neutral effects to the host organism. Earlier considered as "junk DNA," TEs are now well-accepted driving forces of evolution and critical regulators of the expression of genetic information. Their activity is regulated by epigenetic mechanisms, including methylation of DNA and histone modifications. The loss of epigenetic control over TEs, exhibited as loss of DNA methylation and decondensation of the chromatin structure, may result in TEs reactivation, initiation of their insertional mutagenesis (retrotransposition) and has been reported in numerous human diseases, including cancer. Accumulating evidence suggests that these alterations are not the simple consequences of the disease, but often may drive the pathogenesis, as they can be detected early during disease development. Knowledge derived from the in vitro, in vivo, and epidemiological studies, clearly demonstrates that exposure to ubiquitous environmental stressors, many of which are carcinogens or suspected carcinogens, are capable of causing alterations in methylation and expression of TEs and initiate retrotransposition events. Evidence summarized in this review suggests that TEs are the sensitive endpoints for detection of effects caused by such environmental stressors, as ionizing radiation (terrestrial, space, and UV-radiation), air pollution (including particulate matter [PM]-derived and gaseous), persistent organic pollutants, and metals. Furthermore, the significance of these effects is characterized by their early appearance, persistence and presence in both, target organs and peripheral blood. Altogether, these findings suggest that TEs may potentially be introduced into safety and risk assessment and serve as biomarkers of exposure to environmental stressors. Furthermore, TEs also show significant potential to become invaluable surrogate biomarkers in clinic and possible targets for therapeutic modalities for disease treatment and prevention.
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Affiliation(s)
- Isabelle R Miousse
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Marie-Cecile G Chalbot
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Annie Lumen
- Division of Biochemical Toxicology, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR 72079, USA.
| | - Alesia Ferguson
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Ilias G Kavouras
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Igor Koturbash
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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17
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Shimizu R, Kanno K, Sugiyama A, Ohata H, Araki A, Kishikawa N, Kimura Y, Yamamoto H, Kodama M, Kihira K, Tazuma S. Cholangiocyte senescence caused by lysophosphatidylcholine as a potential implication in carcinogenesis. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2015; 22:675-82. [PMID: 25921542 DOI: 10.1002/jhbp.256] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/23/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND The incidence of biliary tract cancer in patients with pancreaticobiliary maljunction or intrahepatic cholelithiasis is markedly high with undefined mechanism. In these diseases, biliary lysophosphatidylcholine (LPC) level is reportedly increased. This study investigated the influence of LPC on cholangiocytes focusing on cellular senescence and its potential contribution to carcinogenesis. METHODS Cultured MMNK-1, an immortalized human cholangiocyte was treated with LPC in vitro and its effect was evaluated. RESULTS Lysophosphatidylcholine demonstrated cytotoxicity with generation of intracellular reactive oxygen species. Accordingly, LPC provoked oxidative DNA injury, whereas the gene expressions of DNA repair enzyme (OGG1, MUTYH, MTH1) remained unchanged. Interestingly, LPC caused global DNA hypomethylation, which is frequently observed in cancer tissues. Microarray analysis identified differentially regulated genes in response to LPC, which included the components of senescence-associated secretory phenotype (SASP) including interleukin-8 (IL-8), IL-6, transforming growth factor-β and plasminogen activator inhibitor-1. Significant induction of these genes was further confirmed by quantitative real-time polymerase chain reaction. In addition to upregulation of p21 gene expression, senescence-associated beta-galactosidase activity, a widely used marker of cellular senescence was significantly induced by the treatment of LPC. CONCLUSIONS Based on these data, cholangiocyte senescence and SASP caused by LPC are potential pathogenic mechanisms in the development of biliary tract cancer.
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Affiliation(s)
- Rina Shimizu
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Keishi Kanno
- Department of General Internal Medicine, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku,, Hiroshima, 734-8551, Japan
| | - Akiko Sugiyama
- Department of General Internal Medicine, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku,, Hiroshima, 734-8551, Japan
| | - Hiroki Ohata
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Anna Araki
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Nobusuke Kishikawa
- Department of General Internal Medicine, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku,, Hiroshima, 734-8551, Japan
| | - Yasuhiro Kimura
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Hiroya Yamamoto
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Masanobu Kodama
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Kenji Kihira
- Department of Pharmaceutical Services, Hiroshima University Hospital, Hiroshima, Japan
| | - Susumu Tazuma
- Department of General Internal Medicine, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku,, Hiroshima, 734-8551, Japan
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