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Zhou T, Yin SJ, Wang P, Fan YX, Li ZR, Yang Q, Huang YH, Meng R, He GH. Association between TNF-α gene polymorphisms and susceptibility of myelodysplastic syndromes: a meta-analysis. Hematology 2021; 26:1046-1056. [PMID: 34895100 DOI: 10.1080/16078454.2021.2009647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVE Myelodysplastic syndromes (MDS) constitute a heterogeneous group of clonal hematological diseases. Previous investigations reported that tumor necrosis factor-alpha (TNF-α) gene polymorphisms were associated with MDS susceptibility, but the results remained controversial. Thus, we conducted a meta-analysis to higher elucidate the correlation between TNF-α gene polymorphisms and MDS susceptibility. METHODS The PubMed, Cochrane Library, Embase, Chinese National Knowledge Infrastructure (CNKI), and Wan Fang databases were searched for eligible literatures published up to July 2021. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were applied to evaluate the strength of association. RESULTS Eight studies involving 1180 MDS patients and 1387 controls were included in this meta-analysis. For the TNF-α G308A polymorphism, we confirmed that the G allele (G versus A: P = 0.001), GG genotypes (GG versus GA: P = 0.005; GG versus GA + AA: P = 0.002), and GG + AA genotypes (GG + AA versus GA: P = 0.008) was significantly associated with decreased MDS susceptibility according to different genetic models. Furthermore, the G308A polymorphism was significantly correlated with decreased occurrence risk of MDS in the Caucasian population as compared with Asians in the above four genetic models (P < 0.05). However, no significant association was observed between the TNF-α G238A polymorphism and MDS risk. CONCLUSION This research showed that TNF-α G308A polymorphism might be a potential biomarker in early clinical screening of MDS, which would contribute to improving the individualized prevention of MDS patients in clinic.
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Affiliation(s)
- Tao Zhou
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China.,College of Pharmacy, Dali University, Yunnan Dali, People's Republic of China
| | - Sun-Jun Yin
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China
| | - Ping Wang
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China
| | - Yu-Xin Fan
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China.,College of Pharmacy, Dali University, Yunnan Dali, People's Republic of China
| | - Zhi-Ran Li
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China.,College of Pharmacy, Dali University, Yunnan Dali, People's Republic of China
| | - Qin Yang
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China.,College of Pharmacy, Dali University, Yunnan Dali, People's Republic of China
| | - Yan-Hua Huang
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China.,College of Pharmacy, Dali University, Yunnan Dali, People's Republic of China
| | - Rui Meng
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China
| | - Gong-Hao He
- Department of Clinical Pharmacy, 920th Hospital of Joint Logistics Support Force of People's Liberation Army, Kunming, People's Republic of China
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Youn M, Huang H, Chen C, Kam S, Wilkes MC, Chae HD, Sridhar KJ, Greenberg PL, Glader B, Narla A, Lin S, Sakamoto KM. MMP9 inhibition increases erythropoiesis in RPS14-deficient del(5q) MDS models through suppression of TGF-β pathways. Blood Adv 2019; 3:2751-2763. [PMID: 31540902 PMCID: PMC6759738 DOI: 10.1182/bloodadvances.2019000537] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/23/2019] [Indexed: 12/11/2022] Open
Abstract
The del(5q) myelodysplastic syndrome (MDS) is a distinct subtype of MDS, associated with deletion of the ribosomal protein S14 (RPS14) gene that results in macrocytic anemia. This study sought to identify novel targets for the treatment of patients with del(5q) MDS by performing an in vivo drug screen using an rps14-deficient zebrafish model. From this, we identified the secreted gelatinase matrix metalloproteinase 9 (MMP9). MMP9 inhibitors significantly improved the erythroid defect in rps14-deficient zebrafish. Similarly, treatment with MMP9 inhibitors increased the number of colony forming unit-erythroid colonies and the CD71+ erythroid population from RPS14 knockdown human BMCD34+ cells. Importantly, we found that MMP9 expression is upregulated in RPS14-deficient cells by monocyte chemoattractant protein 1. Double knockdown of MMP9 and RPS14 increased the CD71+ population compared with RPS14 single knockdown, suggesting that increased expression of MMP9 contributes to the erythroid defect observed in RPS14-deficient cells. In addition, transforming growth factor β (TGF-β) signaling is activated in RPS14 knockdown cells, and treatment with SB431542, a TGF-β inhibitor, improved the defective erythroid development of RPS14-deficient models. We found that recombinant MMP9 treatment decreases the CD71+ population through increased SMAD2/3 phosphorylation, suggesting that MMP9 directly activates TGF-β signaling in RPS14-deficient cells. Finally, we confirmed that MMP9 inhibitors reduce SMAD2/3 phosphorylation in RPS14-deficient cells to rescue the erythroid defect. In summary, these study results support a novel role for MMP9 in the pathogenesis of del(5q) MDS and the potential for the clinical use of MMP9 inhibitors in the treatment of patients with del(5q) MDS.
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Affiliation(s)
- Minyoung Youn
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Haigen Huang
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA; and
| | - Cheng Chen
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA; and
| | - Sharon Kam
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Mark C Wilkes
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Hee-Don Chae
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | | | | | - Bertil Glader
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Anupama Narla
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Shuo Lin
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA; and
| | - Kathleen M Sakamoto
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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3
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Yu W, Chen G, Sun Y, Gao S, Li W, Cui J, Sun J. Gastric carcinoma subsequent to myelodysplastic syndrome with t (1; 19) chromosome translocation: A rare case report and its potential mechanisms. Medicine (Baltimore) 2018; 97:e11535. [PMID: 30045276 PMCID: PMC6078750 DOI: 10.1097/md.0000000000011535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/21/2018] [Indexed: 11/28/2022] Open
Abstract
RATIONALE Myelodysplastic syndrome (MDS) is a heterogeneous malignant hematologic disease with median overall survival ranging from six months to more than ten years. Solid tumor rarely occurs in combination with MDS and the underlying pathogenesis and prognostic significance still remain controversial. PATIENT CONCERNS Here we report a relative low risk myelodysplastic syndrome-refractory cytopenia with multilineage dysplasia (MDS-RCMD) patient, with a rare t(1; 19)chromosome translocation. This patient also suffered from gastric carcinoma. DIAGNOSES Gastric carcinoma, Myelodysplastic syndrome with t (1; 19) chromosome translocation. INTERVENTIONS This patient received radical operation for gastric carcinoma and erythropoietin infusion. OUTCOMES The patient took follow up visits every 2 to 3 months in past years and now he is in stable disease without further treatment. LESSONS We reviewed the mechanism of MDS complicated by solid tumor and concluded the potential mechanisms of this patient. The interactions between potential factors may play a role in oncogenesis which, however, need an in-depth study of its operating mechanism.
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Affiliation(s)
- Wenqing Yu
- Cancer Center, the First Hospital of Jilin Unversity, Jilin
- Department of Hematology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai
| | - Gaoyang Chen
- Research Center ,the Second Hospital of Jilin UniversityJilin
| | - Yunpeng Sun
- Cardiovascular Surgery Department, the First Hospital of Jilin Unversity, Jilin, People's Republic of China
| | - Sujun Gao
- Cancer Center, the First Hospital of Jilin Unversity, Jilin
| | - Wei Li
- Cancer Center, the First Hospital of Jilin Unversity, Jilin
| | - Jiuwei Cui
- Cancer Center, the First Hospital of Jilin Unversity, Jilin
| | - Jingnan Sun
- Cancer Center, the First Hospital of Jilin Unversity, Jilin
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4
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Asayama T, Tamura H, Ishibashi M, Kuribayashi-Hamada Y, Onodera-Kondo A, Okuyama N, Yamada A, Shimizu M, Moriya K, Takahashi H, Inokuchi K. Functional expression of Tim-3 on blasts and clinical impact of its ligand galectin-9 in myelodysplastic syndromes. Oncotarget 2017; 8:88904-88917. [PMID: 29179486 PMCID: PMC5687656 DOI: 10.18632/oncotarget.21492] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 08/23/2017] [Indexed: 12/20/2022] Open
Abstract
T-cell immunoglobulin mucin-3 (Tim-3), an inhibitory immune checkpoint receptor, is highly expressed on acute myeloid leukemia cells and its ligand galectin-9 is reported to drive leukemic progression by binding with Tim-3. However, it remains unclear whether the Tim-3–galectin-9 pathway is associated with the pathophysiology of myelodysplastic syndromes (MDS). Thus, we investigated the expression and function of Tim-3 and the clinical impact of its ligand galectin-9 in MDS. Tim-3 expression levels on MDS blasts by CD45/side-scatter or CD34/CD45 gating were increased as MDS progressed to the advanced stage. Tim-3 expression in the MDS blasts was upregulated in the presence of the cell culture supernatant of human stromal cells or the MDS-related cytokine transforming growth factor-β1. The proliferation of Tim-3+ MDS blasts was inhibited by the blockade of anti-Tim-3 antibody. Furthermore, plasma levels of galectin-9 were elevated as MDS progressed to the advanced stage in 70 MDS/acute leukemia transformed from MDS patients and was a prognostic factor in 40 MDS patients. Our data demonstrated that the Tim-3-galectin-9 pathway is associated with the pathogenesis and disease progression of MDS. These findings provide new insight into potential immunotherapy targeting the galectin-9–Tim-3 pathway in MDS.
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Affiliation(s)
- Toshio Asayama
- Department of Hematology, Nippon Medical School, Tokyo, Japan
| | - Hideto Tamura
- Department of Hematology, Nippon Medical School, Tokyo, Japan
| | | | | | | | - Namiko Okuyama
- Department of Hematology, Nippon Medical School, Tokyo, Japan
| | - Akiko Yamada
- Department of Hematology, Nippon Medical School, Tokyo, Japan
| | - Masumi Shimizu
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Keiichi Moriya
- Department of Hematology, Nippon Medical School, Tokyo, Japan
| | - Hidemi Takahashi
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Koiti Inokuchi
- Department of Hematology, Nippon Medical School, Tokyo, Japan
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5
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Influence of TNF and IL6 gene polymorphisms on the severity of cytopenias in Argentine patients with myelodysplastic syndromes. Ann Hematol 2017; 96:1287-1295. [DOI: 10.1007/s00277-017-3036-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 05/26/2017] [Indexed: 01/05/2023]
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6
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Loukov D, Naidoo A, Puchta A, Marin JLA, Bowdish DME. Tumor necrosis factor drives increased splenic monopoiesis in old mice. J Leukoc Biol 2016; 100:121-9. [DOI: 10.1189/jlb.3ma0915-433rr] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 03/12/2016] [Indexed: 12/24/2022] Open
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7
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Chen W, Zhu H, Yu L, Lu Z, Yao Z, Xiao Y. TNF-α -308 G>A polymorphism and risk of bone marrow failure syndrome: A meta-analysis. Gene 2015; 565:1-8. [PMID: 25895473 DOI: 10.1016/j.gene.2015.04.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/17/2015] [Accepted: 04/09/2015] [Indexed: 11/19/2022]
Abstract
The influence of the TNF-α -308 G>A polymorphism on bone marrow failure syndrome susceptibility is unclear. We have conducted a meta-analysis of all relevant published studies. We searched PubMed, Chinese Biomedical Literature and China National Knowledge Infrastructure databases up to February 2015. Odds ratios (ORs) with 95% confidence intervals (CIs) were applied to assess the strength of associations. Eleven case-control studies with a total sample size of 909 cases and 1803 controls were eligible to assess the association between the TNF-α -308 G>A polymorphism and susceptibility to bone marrow failure syndrome. Overall, the TNF-α -308 G>A polymorphism was significantly associated with an increased risk of bone marrow failure syndrome in any genetic model. In stratified analysis by disease type, there was a significant association between the TNF-α -308 G>A polymorphism and increased risk of aplastic anemia but no significant association with myelodysplastic syndrome (AA vs. GG: OR=2.23, 95% CI=1.23-4.05, P=0.006; recessive model: OR=3.52, 95% CI=1.30-9.53, P=0.010). In subgroup analysis by ethnicity, there were significant associations between the TNF-α -308 G>A polymorphism and increased risk of bone marrow failure syndrome for Caucasians in two models, but not in Asian populations (AA vs. GG: OR=2.66, 95% CI=1.36-5.21, P=0.003; recessive model: OR=2.68, 95% CI=1.37-5.24, P=0.002). In conclusion, our meta-analysis suggests that the TNF-α -308 G>A polymorphism may contribute to the risk of bone marrow failure syndrome, particularly among Caucasian and aplastic anemia patients. Further investigations are needed to clarify the role of the TNF-α -308 G>A polymorphism in bone marrow failure syndrome.
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Affiliation(s)
- Wancheng Chen
- Department of Hematology, First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China; Department of Hematology, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - Haili Zhu
- Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Lili Yu
- Cancer Research Institute, Southern Medical University, Guangzhou 510515, China
| | - Ziyuan Lu
- Department of Hematology, First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
| | - Zhuoxin Yao
- Department of Hematology, First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China; Department of Hematology, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - Yang Xiao
- Department of Hematology, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China.
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8
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Abstract
Myelodysplastic syndromes (MDS) are characterized by ineffective hematopoiesis that leads to peripheral cytopenias. We observed that SMAD7, a negative regulator of transforming growth factor-beta (TGF-β) receptor-I kinase, is markedly reduced in MDS and leads to ineffective hematopoiesis by overactivation of TGF-β signaling. To determine the cause of SMAD7 reduction in MDS, we analyzed the 3'UTR of the gene and determined that it contains a highly conserved putative binding site for microRNA-21. We observed significantly elevated levels of miR-21 in MDS marrow samples when compared with age-matched controls. miR-21 was shown to directly bind to the 3'UTR of SMAD7 and reduce its expression in hematopoietic cells. Next, we tested the role of miR-21 in regulating TGF-β signaling in a TGF-β-overexpressing transgenic mouse model that develops progressive anemia and dysplasia and thus serves as a model of human bone marrow failure. Treatment with a chemically modified miR-21 inhibitor led to significant increases in hematocrit and led to an increase in SMAD7 expression in vivo. Inhibition of miR-21 also led to an increase in erythroid colony formation from primary MDS bone marrow progenitors, demonstrating its ability in stimulating hematopoiesis in vitro. Taken together, these studies demonstrate the role of miR-21 in regulating overactivated TGF-β signaling in MDS.
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9
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Belli CB, Bestach Y, Sieza Y, Gelemur M, Giunta M, Flores MG, Watman N, Bengió R, Larripa I. The presence of -308A TNFα is associated with anemia and thrombocytopenia in patients with myelodysplastic syndromes. Blood Cells Mol Dis 2011; 47:255-8. [DOI: 10.1016/j.bcmd.2011.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 08/23/2011] [Accepted: 09/01/2011] [Indexed: 10/16/2022]
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10
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Baldridge MT, King KY, Goodell MA. Inflammatory signals regulate hematopoietic stem cells. Trends Immunol 2011; 32:57-65. [PMID: 21233016 DOI: 10.1016/j.it.2010.12.003] [Citation(s) in RCA: 272] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/02/2010] [Accepted: 12/09/2010] [Indexed: 02/06/2023]
Abstract
Hematopoietic stem cells (HSCs) are the progenitors of all blood and immune cells, yet their role in immunity is not well understood. Most studies have focused on the ability of committed lymphoid and myeloid precursors to replenish immune cells during infection. Recent studies, however, have indicated that HSCs also proliferate in response to systemic infection and replenish effector immune cells. Inflammatory signaling molecules including interferons, tumor necrosis factor-α and Toll-like receptors are essential to the HSC response. Observing the biology of HSCs through the lens of infection and inflammation has led to the discovery of an array of immune-mediators that serve crucial roles in HSC regulation and function.
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Affiliation(s)
- Megan T Baldridge
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
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11
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Zhou L, McMahon C, Bhagat T, Alencar C, Yu Y, Fazzari M, Sohal D, Heuck C, Gundabolu K, Ng C, Mo Y, Shen W, Wickrema A, Kong G, Friedman E, Sokol L, Mantzaris I, Mantzaris G, Pellagatti A, Boultwood J, Platanias LC, Steidl U, Yan L, Yingling JM, Lahn MM, List A, Bitzer M, Verma A. Reduced SMAD7 leads to overactivation of TGF-beta signaling in MDS that can be reversed by a specific inhibitor of TGF-beta receptor I kinase. Cancer Res 2010; 71:955-63. [PMID: 21189329 DOI: 10.1158/0008-5472.can-10-2933] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Even though myelodysplastic syndromes (MDS) are characterized by ineffective hematopoiesis, the molecular alterations that lead to marrow failure have not been well elucidated. We have previously shown that the myelosuppressive TGF-β pathway is constitutively activated in MDS progenitors. Because there is conflicting data about upregulation of extracellular TGF-β levels in MDS, we wanted to determine the molecular basis of TGF-β pathway overactivation and consequent hematopoietic suppression in this disease. We observed that SMAD7, a negative regulator of TGF-β receptor I (TBRI) kinase, is markedly decreased in a large meta-analysis of gene expression studies from MDS marrow-derived CD34(+) cells. SMAD7 protein was also found to be significantly decreased in MDS marrow progenitors when examined immunohistochemically in a bone marrow tissue microarray. Reduced expression of SMAD7 in hematopoietic cells led to increased TGF-β-mediated gene transcription and enhanced sensitivity to TGF-β-mediated suppressive effects. The increased TGF-β signaling due to SMAD7 reduction could be effectively inhibited by a novel clinically relevant TBRI (ALK5 kinase) inhibitor, LY-2157299. LY-2157299 could inhibit TGF-β-mediated SMAD2 activation and hematopoietic suppression in primary hematopoietic stem cells. Furthermore, in vivo administration of LY-2157299 ameliorated anemia in a TGF-β overexpressing transgenic mouse model of bone marrow failure. Most importantly, treatment with LY-2157199 stimulated hematopoiesis from primary MDS bone marrow specimens. These studies demonstrate that reduction in SMAD7 is a novel molecular alteration in MDS that leads to ineffective hematopoiesis by activating of TGF-β signaling in hematopoietic cells. These studies also illustrate the therapeutic potential of TBRI inhibitors in MDS.
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Affiliation(s)
- Li Zhou
- Albert Einstein College of Medicine, Bronx, New York 10461, USA
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12
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Parnes A, Nikiforow S, Berliner N, Vanasse GJ. Single nucleotide polymorphisms in the human TNF gene are associated with anaemia and neutropenia in a cohort of patients with de novo myelodysplastic syndrome. Br J Haematol 2010; 150:700-1. [PMID: 20618340 DOI: 10.1111/j.1365-2141.2010.08254.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Ma W, Kantarjian H, Zhang K, Zhang X, Wang X, Chen C, Donahue AC, Zhang Z, Yeh CH, O'Brien S, Garcia-Manero G, Caporaso N, Landgren O, Albitar M. Significant association between polymorphism of the erythropoietin gene promoter and myelodysplastic syndrome. BMC MEDICAL GENETICS 2010; 11:163. [PMID: 21078205 PMCID: PMC2992491 DOI: 10.1186/1471-2350-11-163] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 11/16/2010] [Indexed: 12/16/2022]
Abstract
Background Myelodysplastic syndrome (MDS) may be induced by certain mutagenic environmental or chemotherapeutic toxins; however, the role of susceptibility genes remains unclear. The G/G genotype of the single-nucleotide polymorphism (SNP) rs1617640 in the erythropoietin (EPO) promoter has been shown to be associated with decreased EPO expression. We examined the association of rs1617640 genotype with MDS. Methods We genotyped the EPO rS1617640 SNP in 189 patients with MDS, 257 with acute myeloid leukemia (AML), 106 with acute lymphoblastic leukemia, 97 with chronic lymphocytic leukemia, 353 with chronic myeloid leukemia, and 95 healthy controls. Results The G/G genotype was significantly more common in MDS patients (47/187; 25.1%) than in controls (6/95; 6.3%) or in patients with other leukemias (101/813; 12.4%) (all P < 0.001). Individuals with the G/G genotype were more likely than those with other genotypes to have MDS (odd ratio = 4.98; 95% CI = 2.04-12.13). Clinical and follow up data were available for 112 MDS patients and 186 AML patients. There was no correlation between EPO promoter genotype and response to therapy or overall survival in MDS or AML. In the MDS group, the GG genotype was significantly associated with shorter complete remission duration, as compared with the TT genotype (P = 0.03). Time to neutrophils recovery after therapy was significantly longer in MDS patients with the G/G genotype (P = 0.02). Conclusions These findings suggest a strong association between the rs1617640 G/G genotype and MDS. Further studies are warranted to investigate the utility of screening for this marker in individuals exposed to environmental toxins or chemotherapy.
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Affiliation(s)
- Wanlong Ma
- Department of Hematology/Oncology, Quest Diagnostics Nichols Institute, San Juan Capistrano, CA, USA
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14
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Feng Y, Wen J, Chang CCJ. p38 Mitogen-activated protein kinase and hematologic malignancies. Arch Pathol Lab Med 2009; 133:1850-6. [PMID: 19886722 DOI: 10.5858/133.11.1850] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2009] [Indexed: 11/06/2022]
Abstract
CONTEXT p38 mitogen-activated protein kinase (MAPK) signaling has been implicated in responses ranging from apoptosis to cell cycle, induction of expression of cytokine genes, and differentiation. This plethora of activators conveys the complexity of the p38 pathway. This complexity is further complicated by the observation that the downstream effects of p38 MAPK activation may be different depending on types of stimuli, cell types, and various p38 MAPK isoforms involved. OBJECTIVE This review focuses on the recent advancement of the p38 MAPK isoforms as well as the roles of p38 MAPK in hematologic malignancies. DATA SOURCES Review of pertinent published literature and work in our laboratory. CONCLUSIONS In some hematologic malignancies, activation of p38 plays a key role in promoting or inhibiting proliferation and also in increasing resistance to chemotherapeutic agents. The importance of different p38 isoforms in various cellular functions has been acknowledged recently. Further understanding of these isoforms will allow the design of more specific inhibitors to target particular isoforms to maximize the treatment effect and minimize the side effects for treating hematopoietic malignancies.
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Affiliation(s)
- Yongdong Feng
- Department of Pathology, The Methodist Hospital and The Methodist Hospital Research Institute, Houston, Texas, USA
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15
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Zou JX, Rollison DE, Boulware D, Chen DT, Sloand EM, Pfannes LV, Goronzy JJ, Bai F, Painter JS, Wei S, Cosgrove D, List AF, Epling-Burnette PK. Altered naive and memory CD4+ T-cell homeostasis and immunosenescence characterize younger patients with myelodysplastic syndrome. Leukemia 2009; 23:1288-96. [PMID: 19282834 PMCID: PMC3252820 DOI: 10.1038/leu.2009.14] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 12/16/2008] [Accepted: 12/31/2008] [Indexed: 01/10/2023]
Abstract
Response to immunosuppressive therapy (IST) in younger patients with myelodysplastic syndrome (MDS) has been linked to a T-cell-dominant autoimmune process that impairs hematopoiesis. Analysis of the age-adjusted CD4:CD8 ratio in 76 MDS patients compared with 54 healthy controls showed that inadequate CD4+, rather than expansion of CD8+ T cells, was associated with a lower ratio in a group that included both lower and higher risk MDS patients defined by the International Prognostic Scoring System. In younger MDS patients, naive and memory phenotypes defined by CD45RA and CD62L display showed depletion of naive CD4+ and CD8+ T cells, suggesting a possible relationship to IST responsiveness. To determine the correlation between T-cell subset distribution, T-cell turnover and autoimmunity, a cohort of 20 patients were studied before and after IST. The CD4:CD8 ratio correlated inversely with the proliferative T-cell index before treatment in IST-responsive patients, suggesting that proliferation may be linked to accelerated CD4+ T-cell turnover and hematopoietic failure. Our data show seminal findings that both CD4+ and CD8+ T-cell subsets are dysregulated in MDS. Association between these T-cell defects and response to IST suggests that aberrant T-cell homeostasis and chronic activation are critical determinants influencing autoimmune hematopoietic suppression in younger patients.
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Affiliation(s)
- JX Zou
- Immunology Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - DE Rollison
- Division of Cancer Prevention and Control at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - D Boulware
- Biostatistics Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - D-T Chen
- Biostatistics Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - EM Sloand
- NIH, NHLBI, Hematology Branch, Bethesda, MD, USA
| | - LV Pfannes
- NIH, NHLBI, Hematology Branch, Bethesda, MD, USA
| | - JJ Goronzy
- Lowance Center for Human Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - F Bai
- Immunology Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - JS Painter
- Immunology Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - S Wei
- Immunology Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - D Cosgrove
- Division of Hematologic Malignancies, H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - AF List
- Division of Hematologic Malignancies, H. Lee Moffitt Cancer Center, Tampa, FL, USA
| | - PK Epling-Burnette
- Immunology Program at the H. Lee Moffitt Cancer Center, Tampa, FL, USA
- Lowance Center for Human Immunology, Emory University School of Medicine, Atlanta, GA, USA
- James A. Haley VA Hospital, Tampa, FL, USA
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Abstract
MDS is characterized by ineffective hematopoiesis that leads to peripheral cytopenias. Development of effective treatments has been impeded by limited insight into pathogenic pathways governing dysplastic growth of hematopoietic progenitors. We demonstrate that smad2, a downstream mediator of transforming growth factor-beta (TGF-beta) receptor I kinase (TBRI) activation, is constitutively activated in MDS bone marrow (BM) precursors and is overexpressed in gene expression profiles of MDS CD34(+) cells, providing direct evidence of overactivation of TGF-beta pathway in this disease. Suppression of the TGF-beta signaling by lentiviral shRNA-mediated down-regulation of TBRI leads to in vitro enhancement of hematopoiesis in MDS progenitors. Pharmacologic inhibition of TBRI (alk5) kinase by a small molecule inhibitor, SD-208, inhibits smad2 activation in hematopoietic progenitors, suppresses TGF-beta-mediated gene activation in BM stromal cells, and reverses TGF-beta-mediated cell-cycle arrest in BM CD34(+) cells. Furthermore, SD-208 treatment alleviates anemia and stimulates hematopoiesis in vivo in a novel murine model of bone marrow failure generated by constitutive hepatic expression of TGF-beta1. Moreover, in vitro pharmacologic inhibition of TBRI kinase leads to enhancement of hematopoiesis in varied morphologic MDS subtypes. These data directly implicate TGF-beta signaling in the pathobiology of ineffective hematopoiesis and identify TBRI as a potential therapeutic target in low-risk MDS.
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