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SERPINB2, an Early Responsive Gene to Epigallocatechin Gallate, Inhibits Migration and Promotes Apoptosis in Esophageal Cancer Cells. Cells 2022; 11:cells11233852. [PMID: 36497110 PMCID: PMC9738437 DOI: 10.3390/cells11233852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/13/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
Esophageal cancer is a lethal disease that frequently occurs in developing countries, the incidence of which could be declined by drinking EGCG-enriched drinks or food. SERPINB2, whose complex functions and regulations are not yet fully understood, are induced by multiple inflammatory molecules and anti-tumor agents. Here, we identify 2444 EGCG-regulated genes in esophageal cancer cells, including SERPINB2. EGCG treatment recruits NF-κB at the promoter and enhancers of SERPINB2 and activates gene transcription, which is repressed by NF-κB knockdown or inhibition. Loss of SERPINB2 leads to a faster migration rate and less expression of Caspase-3 in cancer cells. Our study demonstrates that SERPINB2 is a new tumor-suppressor gene involved in cell movement and apoptosis and could be a therapeutic target for esophageal cancer.
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2
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SERPINB2-its regulation and interplay with aryl hydrocarbon receptor. J Appl Genet 2021; 62:99-105. [PMID: 33387293 DOI: 10.1007/s13353-020-00606-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 11/27/2020] [Accepted: 12/22/2020] [Indexed: 12/19/2022]
Abstract
Despite many years of intensive investigation, real biological role of SERPINB2 is largely unknown. However, recent high throughput studies suggest its function in inflammation, influence on autoimmune disorders, and modulation of processes leading to carcinogenesis. SERPINB2 expression is acutely upregulated by many different stimuli, among others by aryl hydrocarbon receptor ligands. Mechanisms of regulation of SERPINB2 expression, involvement of the gene in processes leading to inflammation or carcinogenesis, and its interplay with aryl hydrocarbon receptor are subject of present review.
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3
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Brauze D, Kiwerska K, Bednarek K, Grenman R, Janiszewska J, Giefing M, Jarmuz-Szymczak M. Expression of Serpin Peptidase Inhibitor B2 (SERPINB2) is regulated by Aryl hydrocarbon receptor (AhR). Chem Biol Interact 2019; 309:108700. [DOI: 10.1016/j.cbi.2019.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 04/30/2019] [Accepted: 06/06/2019] [Indexed: 12/19/2022]
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Griemert EV, Recarte Pelz K, Engelhard K, Schäfer MK, Thal SC. PAI-1 but Not PAI-2 Gene Deficiency Attenuates Ischemic Brain Injury After Experimental Stroke. Transl Stroke Res 2019; 10:372-380. [PMID: 29978354 PMCID: PMC6647425 DOI: 10.1007/s12975-018-0644-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 11/17/2022]
Abstract
After stroke, secondary brain damage is influenced by the extent of fibrin clot formation. This is counteracted by the endogenous fibrinolysis. Of major interest are the key players of the fibrinolytic plasminogen activator system including the urokinase plasminogen activator (uPA), the tissue-type plasminogen activator (tPA), and their endogenous inhibitors plasminogen activator inhibitor 1 (PAI-1) and PAI-2. The role of PAI-1 in brain injury is well established, whereas the importance of PAI-2 is unknown at present. The objectives of the present were twofold: first, to characterize the time-dependent cerebral mRNA expression of the plasminogen activator system (PAS) after brain ischemia and second, to investigate the impact of PAI-1 and PAI-2 on brain infarct volume using gene-deficient mice. Adult C57Bl/6J mice were subjected to unilateral transient middle cerebral artery occlusion (MCAO) followed by reperfusion for 3, 24, 72, or 120 h. Quantitative PCR revealed that brain mRNA expression levels of the PAS components, and particularly of PAI-1 (237-fold) and PAI-2 (19-fold), peaked at 24 h after stroke. Accordingly, PAI-1 plasma activity was strongly increased. Brain infarct volume in TTC (2,3,5-triphenyltetrazolium chloride)-stained brain sections was significantly smaller 24 h after MCAO in PAI-1-deficient mice (- 31%), but not in PAI-2-deficient mice (- 6%). Thus, endogenous upregulation of PAI-1, but not of PAI-2, might contribute to increased brain damage after acute ischemic stroke. The present study therefore shows that PAI-2 is induced by brain ischemia, but does not play an important or relevant role for secondary brain damage after brain injury.
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Affiliation(s)
- Eva-Verena Griemert
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Kirsten Recarte Pelz
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Kristin Engelhard
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Michael K Schäfer
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Serge C Thal
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstrasse 1, 55131, Mainz, Germany.
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Jin T, Suk Kim H, Ki Choi S, Hye Hwang E, Woo J, Suk Ryu H, Kim K, Moon A, Kyung Moon W. microRNA-200c/141 upregulates SerpinB2 to promote breast cancer cell metastasis and reduce patient survival. Oncotarget 2018; 8:32769-32782. [PMID: 28427146 PMCID: PMC5464826 DOI: 10.18632/oncotarget.15680] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 02/12/2017] [Indexed: 11/25/2022] Open
Abstract
The microRNA-200 (miR-200) family is associated with tumor metastasis and poor patient prognosis. We found that miR-200c/141 cluster overexpression upregulated SerpinB2 in the MDA-MB-231 triple-negative (TN) breast cancer cell line. We observed transcription factor (c-Jun, c-Fos, and FosB) upregulation, nuclear localization of c-Jun, and increased SerpinB2 promoter-directed chloramphenicol acetyltransferase activity in miR-200c/141 cluster-overexpressing cells relative to controls. Additionally, miR-124a and miR-26b, which directly target SepinB2, were downregulated compared to controls. In mouse xenograft models, miR-200c/141 cluster overexpression promoted lymph node and lung metastasis, and siRNA-mediated SerpinB2 knockdown decreased lung metastasis, suggesting that SerpinB2 mediates miR-200c/141-induced lung metastasis. We also explored the clinical significance of SerpinB2 protein status through analysis of primary breast tumor samples and The Cancer Genome Atlas (TCGA) data. High SerpinB2 levels were associated with reduced survival and increased lymph node metastasis in breast cancer patients. SerpinB2 was overexpressed in the TN breast cancer subtype as compared to the luminal subtype. The present study demonstrates that SerpinB2 promotes miR-200c/141 cluster overexpression-induced breast cancer cell metastasis, and SerpinB2 overexpression correlates with increased metastatic potential and unfavorable outcomes in breast cancer patients. SerpinB2 may be a useful biomarker for assessing metastasis risk in breast cancer patients.
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Affiliation(s)
- Tiefeng Jin
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea.,Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China
| | - Hoe Suk Kim
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea
| | - Sul Ki Choi
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea.,Department of Biomedical Science, Seoul National University College of Medicine, Seoul National University, Jongno-gu, Seoul 03080, Korea
| | - Eun Hye Hwang
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea
| | - Jisu Woo
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea
| | - Han Suk Ryu
- Department of Pathology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea
| | - Kwangsoo Kim
- Division of Clinical Bioinformatics, Biomedical Research Institute, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea
| | - Aree Moon
- Duksung Innovative Drug Center College of Pharmacy, Duksung Women's University, Dobong-gu, Seoul 01369, Korea
| | - Woo Kyung Moon
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul 03080, Korea.,Department of Biomedical Science, Seoul National University College of Medicine, Seoul National University, Jongno-gu, Seoul 03080, Korea
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Shin DW, Kwon YJ, Ye DJ, Baek HS, Lee JE, Chun YJ. Auranofin Suppresses Plasminogen Activator Inhibitor-2 Expression through Annexin A5 Induction in Human Prostate Cancer Cells. Biomol Ther (Seoul) 2017; 25:177-185. [PMID: 27956714 PMCID: PMC5340543 DOI: 10.4062/biomolther.2016.223] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 10/04/2016] [Accepted: 10/17/2016] [Indexed: 12/13/2022] Open
Abstract
Auranofin has been developed as antirheumatic drugs, which is currently under clinical development for the treatment of chronic lymphocytic leukemia. Previous report showed that auranofin induced apoptosis by enhancement of annexin A5 expression in PC-3 cells. To understand the role of annexin A5 in auranofin-mediated apoptosis, we performed microarray data analysis to study annexin A5-controlled gene expression in annexin A5 knockdown PC-3 cells. Of differentially expressed genes, plasminogen activator inhibitor (PAI)-2 was increased by annexin A5 siRNA confirmed by qRT-PCR and western blot. Treatment with auranofin decreased PAI-2 and increased annexin A5 expression as well as promoting apoptosis. Furthermore, auranofin-induced apoptosis was recovered by annexin A5 siRNA but it was promoted by PAI-2 siRNA. Interestingly, knockdown of annexin A5 rescued PAI-2 expression suppressed by auranofin. Taken together, our study suggests that induction of annexin A5 by auranofin may enhance apoptosis through suppression of PAI-2 expression in PC-3 cells.
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Affiliation(s)
- Dong-Won Shin
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yeo-Jung Kwon
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Dong-Jin Ye
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hyoung-Seok Baek
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Joo-Eun Lee
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Young-Jin Chun
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
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Wahlmüller FC, Yang H, Furtmüller M, Geiger M. Regulation of the Extracellular SERPINA5 (Protein C Inhibitor) Penetration Through Cellular Membranes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017. [PMID: 28639251 DOI: 10.1007/5584_2017_60] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It is generally accepted that the phospholipid bilayer of the cell membrane is impermeable for proteins and peptides and that these molecules require special mechanisms for their transport from the extra- to the intracellular space. Recently there is increasing evidence that certain proteins/peptides can also directly cross the phospholipid membrane. SERPINA5 (protein C inhibitor) is a secreted protease inhibitor with broad protease reactivity and wide tissue distribution. It binds glycosaminoglycans and certain phospoholipids, which can modulate its inhibitory activity. SERPINA5 has been shown to be internalized by platelets, granulocytes, HL-60 promyelocytic leukemia cells, and by Jurkat lymphoma cells. Once inside the cell it can translocate to the nucleus. There are several indications that SERPINA5 can directly cross the phospholipid bilayer of the cell membrane. In this review we will describe what is known so far about the conditions, as well as the cellular and molecular requirements for SERPINA5 translocation through the cell membrane and for its penetration of pure phospholipid vesicles.
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Affiliation(s)
- Felix C Wahlmüller
- Department of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria
| | - Hanjiang Yang
- Department of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria
| | - Margareta Furtmüller
- Department of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria
| | - Margarethe Geiger
- Department of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria.
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Hu P, Liu M, Zhang D, Wang J, Niu H, Liu Y, Wu Z, Han B, Zhai W, Shen Y, Chen L. Global identification of the genetic networks and cis-regulatory elements of the cold response in zebrafish. Nucleic Acids Res 2015; 43:9198-213. [PMID: 26227973 PMCID: PMC4627065 DOI: 10.1093/nar/gkv780] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 07/20/2015] [Indexed: 12/17/2022] Open
Abstract
The transcriptional programs of ectothermic teleosts are directly influenced by water temperature. However, the cis- and trans-factors governing cold responses are not well characterized. We profiled transcriptional changes in eight zebrafish tissues exposed to mildly and severely cold temperatures using RNA-Seq. A total of 1943 differentially expressed genes (DEGs) were identified, from which 34 clusters representing distinct tissue and temperature response expression patterns were derived using the k-means fuzzy clustering algorithm. The promoter regions of the clustered DEGs that demonstrated strong co-regulation were analysed for enriched cis-regulatory elements with a motif discovery program, DREME. Seventeen motifs, ten known and seven novel, were identified, which covered 23% of the DEGs. Two motifs predicted to be the binding sites for the transcription factors Bcl6 and Jun, respectively, were chosen for experimental verification, and they demonstrated the expected cold-induced and cold-repressed patterns of gene regulation. Protein interaction modeling of the network components followed by experimental validation suggested that Jun physically interacts with Bcl6 and might be a hub factor that orchestrates the cold response in zebrafish. Thus, the methodology used and the regulatory networks uncovered in this study provide a foundation for exploring the mechanisms of cold adaptation in teleosts.
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Affiliation(s)
- Peng Hu
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Mingli Liu
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Dong Zhang
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Jinfeng Wang
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Hongbo Niu
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Yimeng Liu
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Zhichao Wu
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Bingshe Han
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Wanying Zhai
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Yu Shen
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Liangbiao Chen
- Key Laboratory of Aquacultural Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China
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Genome-wide expression profiles of necrotizing enterocolitis versus spontaneous intestinal perforation in human intestinal tissues: dysregulation of functional pathways. Ann Surg 2015; 260:1128-37. [PMID: 24368664 DOI: 10.1097/sla.0000000000000374] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To provide a comprehensive database of gene regulation and compare differentially regulated molecular networks in human tissues of necrotizing enterocolitis (NEC) and spontaneous intestinal perforation (SIP). BACKGROUND Both NEC and SIP are devastating surgical emergencies associated with high morbidity and mortality in preterm infants. Their pathophysiology and molecular mechanisms remain unclear. METHODS Differential whole genome microarray analysis was performed on intestinal tissues collected from NEC (n = 15) and SIP (n = 12) infants and compared with tissues collected from surgical-control patients with noninflammatory intestinal conditions (n = 14). Validation of 52 target gene expressions was performed by quantitative polymerase chain reaction. Regulatory networks of significantly affected genes were constructed according to functional pathways. RESULTS Extensive and significant changes of gene expression were observed in NEC tissues, which comprised multiple pathways of angiogenesis, arginine metabolism, cell adhesion and chemotaxis, extracellular matrix remodeling, hypoxia and oxidative stress, inflammation, and muscle contraction. These dysregulated genes could be networked downstream of key receptors, TLR2, TLR4, and TREM1, and mediated via NF-κB, AP-1, and HIF1A transcription factor pathways, indicating predominant microbial and inflammatory involvement. In contrast, SIP tissues exhibited much milder and less diversified expressional changes, with target genes significantly associated with G-protein-mediated muscle contraction and extracellular matrix remodeling. CONCLUSIONS The molecular evidence suggests that NEC and SIP are likely 2 different diseases caused by distinct etiology and pathophysiology. This first comprehensive database on differential gene expression profiles of human NEC and SIP tissues could lead to development of disease-specific diagnostic and prognostic biomarkers and new therapeutic strategies for improving outcomes.
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Shea-Donohue T, Zhao A, Antalis TM. SerpinB2 mediated regulation of macrophage function during enteric infection. Gut Microbes 2014; 5:254-8. [PMID: 24637799 PMCID: PMC4063854 DOI: 10.4161/gmic.28093] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Host defense is an orchestrated response involving changes in the expression of receptors and release of mediators from both immune and structural cells. There is a growing recognition of the important role of proteolytic pathways for the protective immune response to enteric pathogens. Enteric nematode infection induces a type 2 immune response with polarization of macrophages toward the alternatively activated phenotype (M2). The Th2 cytokines, IL-4, and IL-13, induce a STAT6-dependent upregulation of the expression of the protease inhibitor, serpinB2, which protects macrophages from apoptosis. M2 are critical to worm clearance and a novel role for serpinB2 is its regulation of the chemokine, CCL2, which is necessary for monocyte and/or macrophage influx into small intestine during infection. There is a growing list of factors including immune (LPS, Th2 cytokines) as well as hormonal (gastrin, 5-HT) that are linked to increased expression of serpinB2. Thus, serpinB2 represents an immune regulated factor that has multiple roles in the intestinal mucosa.
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Affiliation(s)
- Terez Shea-Donohue
- Department of Radiation Oncology; University of Maryland School of Medicine; Baltimore, MD USA,Department of Medicine; University of Maryland School of Medicine; Baltimore, MD USA,Department of Physiology; University of Maryland School of Medicine; Baltimore, MD USA,Correspondence to: Terez Shea-Donohue,
| | - Aiping Zhao
- Department of Radiation Oncology; University of Maryland School of Medicine; Baltimore, MD USA,Department of Medicine; University of Maryland School of Medicine; Baltimore, MD USA
| | - Toni M Antalis
- Department of Physiology; University of Maryland School of Medicine; Baltimore, MD USA,Center for Vascular and Inflammatory Diseases; University of Maryland School of Medicine; Baltimore, MD USA
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11
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Glass C, Wuertzer C, Cui X, Bi Y, Davuluri R, Xiao YY, Wilson M, Owens K, Zhang Y, Perkins A. Global Identification of EVI1 Target Genes in Acute Myeloid Leukemia. PLoS One 2013; 8:e67134. [PMID: 23826213 PMCID: PMC3694976 DOI: 10.1371/journal.pone.0067134] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 05/19/2013] [Indexed: 12/20/2022] Open
Abstract
The ecotropic virus integration site 1 (EVI1) transcription factor is associated with human myeloid malignancy of poor prognosis and is overexpressed in 8-10% of adult AML and strikingly up to 27% of pediatric MLL-rearranged leukemias. For the first time, we report comprehensive genomewide EVI1 binding and whole transcriptome gene deregulation in leukemic cells using a combination of ChIP-Seq and RNA-Seq expression profiling. We found disruption of terminal myeloid differentiation and cell cycle regulation to be prominent in EVI-induced leukemogenesis. Specifically, we identified EVI1 directly binds to and downregulates the master myeloid differentiation gene Cebpe and several of its downstream gene targets critical for terminal myeloid differentiation. We also found EVI1 binds to and downregulates Serpinb2 as well as numerous genes involved in the Jak-Stat signaling pathway. Finally, we identified decreased expression of several ATP-dependent P2X purinoreceptors genes involved in apoptosis mechanisms. These findings provide a foundation for future study of potential therapeutic gene targets for EVI1-induced leukemia.
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Affiliation(s)
- Carolyn Glass
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Charles Wuertzer
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Xiaohui Cui
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Yingtao Bi
- Molecular and Cellular Oncogenesis Program, Center for Systems and Computational Biology The Wistar Institute, Philadelphia, Pennsylvania, United States of America
| | - Ramana Davuluri
- Molecular and Cellular Oncogenesis Program, Center for Systems and Computational Biology The Wistar Institute, Philadelphia, Pennsylvania, United States of America
| | - Ying-Yi Xiao
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Michael Wilson
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Kristina Owens
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Yi Zhang
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Archibald Perkins
- Department of Pathology and Lab Medicine, University of Rochester Medical Center, Rochester, New York, United States of America
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The transcription factor C/EBP-β mediates constitutive and LPS-inducible transcription of murine SerpinB2. PLoS One 2013; 8:e57855. [PMID: 23472114 PMCID: PMC3589482 DOI: 10.1371/journal.pone.0057855] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 01/28/2013] [Indexed: 01/26/2023] Open
Abstract
SerpinB2 or plasminogen activator inhibitor type 2 (PAI-2) is highly induced in macrophages in response to inflammatory stimuli and is linked to the modulation of innate immunity, macrophage survival, and inhibition of plasminogen activators. Lipopolysaccharide (LPS), a potent bacterial endotoxin, can induce SerpinB2 expression via the toll-like receptor 4 (TLR4) by ∼1000-fold over a period of 24 hrs in murine macrophages. To map the LPS-regulated SerpinB2 promoter regions, we transfected reporter constructs driven by the ∼5 kb 5'-flanking region of the murine SerpinB2 gene and several deletion mutants into murine macrophages. In addition, we compared the DNA sequence of the murine 5′ flanking sequence with the sequence of the human gene for homologous functional regulatory elements and identified several regulatory cis-acting elements in the human SERPINB2 promoter conserved in the mouse. Mutation analyses revealed that a CCAAT enhancer binding (C/EBP) element, a cyclic AMP response element (CRE) and two activator protein 1 (AP-1) response elements in the murine SerpinB2 proximal promoter are essential for optimal LPS-inducibility. Electrophoretic mobility shift (EMSA) and chromatin immunoprecipitation (ChIP) assays demonstrated that LPS induces the formation of C/EBP-β containing complexes with the SerpinB2 promoter. Importantly, both constitutive and LPS-induced SerpinB2 expression was severely abrogated in C/EBP-β-null mouse embryonic fibroblasts (MEFs) and primary C/EBP-β-deficient peritoneal macrophages. Together, these data provide new insight into C/EBP-β-dependent regulation of inflammation-associated SerpinB2 expression.
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