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Ghafouri F, Dehghanian Reyhan V, Sadeghi M, Miraei-Ashtiani SR, Kastelic JP, Barkema HW, Shirali M. Integrated Analysis of Transcriptome Profiles and lncRNA-miRNA-mRNA Competing Endogenous RNA Regulatory Network to Identify Biological Functional Effects of Genes and Pathways Associated with Johne's Disease in Dairy Cattle. Noncoding RNA 2024; 10:38. [PMID: 39051372 PMCID: PMC11270299 DOI: 10.3390/ncrna10040038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/25/2024] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Paratuberculosis or Johne's disease (JD), a chronic granulomatous gastroenteritis caused by Mycobacterium avium subsp. paratuberculosis (MAP), causes huge economic losses and reduces animal welfare in dairy cattle herds worldwide. At present, molecular mechanisms and biological functions involved in immune responses to MAP infection of dairy cattle are not clearly understood. Our purpose was to integrate transcriptomic profiles and competing endogenous RNA (ceRNA) network analyses to identify key messenger RNAs (mRNAs) and regulatory RNAs involved in molecular regulation of peripheral blood mononuclear cells (PBMCs) for MAP infection in dairy cattle. In total, 28 lncRNAs, 42 miRNAs, and 370 mRNAs were identified by integrating gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses. In this regard, we identified 21 hub genes (CCL20, CCL5, CD40, CSF2, CXCL8, EIF2AK2, FOS, IL10, IL17A, IL1A, IL1B, IRF1, MX2, NFKB1, NFKBIA, PTGS2, SOCS3, TLR4, TNF, TNFAIP3, and VCAM1) involved in MAP infection. Furthermore, eight candidate subnets with eight lncRNAs, 29 miRNAs, and 237 mRNAs were detected through clustering analyses, whereas GO enrichment analysis of identified RNAs revealed 510, 22, and 11 significantly enriched GO terms related to MAP infection in biological process, molecular function, and cellular component categories, respectively. The main metabolic-signaling pathways related to MAP infection that were enriched included the immune system process, defense response, response to cytokine, leukocyte migration, regulation of T cell activation, defense response to bacterium, NOD-like receptor, B cell receptor, TNF, NF-kappa B, IL-17, and T cell receptor signaling pathways. Contributions of transcriptome profiles from MAP-positive and MAP-negative sample groups plus a ceRNA regulatory network underlying phenotypic differences in the intensity of pathogenicity of JD provided novel insights into molecular mechanisms associated with immune system responses to MAP infection in dairy cattle.
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Affiliation(s)
- Farzad Ghafouri
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 77871-31587, Iran; (F.G.); (V.D.R.); (S.R.M.-A.)
| | - Vahid Dehghanian Reyhan
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 77871-31587, Iran; (F.G.); (V.D.R.); (S.R.M.-A.)
| | - Mostafa Sadeghi
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 77871-31587, Iran; (F.G.); (V.D.R.); (S.R.M.-A.)
| | - Seyed Reza Miraei-Ashtiani
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 77871-31587, Iran; (F.G.); (V.D.R.); (S.R.M.-A.)
| | - John P. Kastelic
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (J.P.K.); (H.W.B.)
| | - Herman W. Barkema
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (J.P.K.); (H.W.B.)
| | - Masoud Shirali
- School of Biological Sciences, Queen’s University Belfast, Belfast BT9 5AJ, UK
- Agri-Food and Biosciences Institute, Hillsborough BT26 6DR, UK
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Zeng C, Zhu X, Li H, Huang Z, Chen M. The Role of Interferon Regulatory Factors in Liver Diseases. Int J Mol Sci 2024; 25:6874. [PMID: 38999981 PMCID: PMC11241258 DOI: 10.3390/ijms25136874] [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] [Received: 05/07/2024] [Revised: 06/12/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
The interferon regulatory factors (IRFs) family comprises 11 members that are involved in various biological processes such as antiviral defense, cell proliferation regulation, differentiation, and apoptosis. Recent studies have highlighted the roles of IRF1-9 in a range of liver diseases, including hepatic ischemia-reperfusion injury (IRI), alcohol-induced liver injury, Con A-induced liver injury, nonalcoholic fatty liver disease (NAFLD), cirrhosis, and hepatocellular carcinoma (HCC). IRF1 is involved in the progression of hepatic IRI through signaling pathways such as PIAS1/NFATc1/HDAC1/IRF1/p38 MAPK and IRF1/JNK. The regulation of downstream IL-12, IL-15, p21, p38, HMGB1, JNK, Beclin1, β-catenin, caspase 3, caspase 8, IFN-γ, IFN-β and other genes are involved in the progression of hepatic IRI, and in the development of HCC through the regulation of PD-L1, IL-6, IL-8, CXCL1, CXCL10, and CXCR3. In addition, IRF3-PPP2R1B and IRF4-FSTL1-DIP2A/CD14 pathways are involved in the development of NAFLD. Other members of the IRF family also play moderately important functions in different liver diseases. Therefore, given the significance of IRFs in liver diseases and the lack of a comprehensive compilation of their molecular mechanisms in different liver diseases, this review is dedicated to exploring the molecular mechanisms of IRFs in various liver diseases.
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Affiliation(s)
- Chuanfei Zeng
- Department of Gastroenterology, Renmin Hospital of Wuhan University, No. 99 Zhang Zhidong Road, Wuhan 430060, China
| | - Xiaoqin Zhu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, No. 99 Zhang Zhidong Road, Wuhan 430060, China
| | - Huan Li
- Department of Gastroenterology, Renmin Hospital of Wuhan University, No. 99 Zhang Zhidong Road, Wuhan 430060, China
| | - Ziyin Huang
- Department of Gastroenterology, Renmin Hospital of Wuhan University, No. 99 Zhang Zhidong Road, Wuhan 430060, China
| | - Mingkai Chen
- Department of Gastroenterology, Renmin Hospital of Wuhan University, No. 99 Zhang Zhidong Road, Wuhan 430060, China
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Zhou B, Zhou N, Liu Y, Dong E, Peng L, Wang Y, Yang L, Suo H, Tao J. Identification and validation of CCR5 linking keloid with atopic dermatitis through comprehensive bioinformatics analysis and machine learning. Front Immunol 2024; 15:1309992. [PMID: 38476235 PMCID: PMC10927814 DOI: 10.3389/fimmu.2024.1309992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 02/02/2024] [Indexed: 03/14/2024] Open
Abstract
There is sufficient evidence indicating that keloid is strongly associated with atopic dermatitis (AD) across ethnic groups. However, the molecular mechanism underlying the association is not fully understood. The aim of this study is to discover the underlying mechanism of the association between keloid and AD by integrating comprehensive bioinformatics techniques and machine learning methods. The gene expression profiles of keloid and AD were downloaded from the Gene Expression Omnibus (GEO) database. A total of 449 differentially expressed genes (DEGs) were found to be shared in keloid and AD using the training datasets of GEO (GSE158395 and GSE121212). The hub genes were identified using the protein-protein interaction network and Cytoscape software. 20 of the most significant hub genes were selected, which were mainly involved in the regulation of the inflammatory and immune response. Through two machine learning algorithms of LASSO and SVM-RFE, CCR5 was identified as the most important key gene. Subsequently, upregulated CCR5 gene expression was confirmed in validation GEO datasets (GSE188952 and GSE32924) and clinical samples of keloid and AD. Immune infiltration analysis showed that T helper (Th) 1, 2 and 17 cells were significantly enriched in the microenvironment of both keloid and AD. Positive correlations were found between CCR5 and Th1, Th2 and Th17 cells. Finally, two TFs of CCR5, NR3C2 and YY1, were identified, both of which were downregulated in keloid and AD tissues. Our study firstly reveals that keloid and AD shared common inflammatory and immune pathways. Moreover, CCR5 plays a key role in the pathogenesis association between keloid and AD. The common pathways and key genes may shed light on further mechanism research and targeted therapy, and may provide therapeutic interventions of keloid with AD.
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Affiliation(s)
- Bin Zhou
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Nuoya Zhou
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Yan Liu
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Enzhu Dong
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Lianqi Peng
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Yifei Wang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Liu Yang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Huinan Suo
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
| | - Juan Tao
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China
- Hubei Engineering Research Center for Skin Repair and Theranostics, Wuhan, Hubei, China
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Perevalova AM, Gulyaeva LF, Pustylnyak VO. Roles of Interferon Regulatory Factor 1 in Tumor Progression and Regression: Two Sides of a Coin. Int J Mol Sci 2024; 25:2153. [PMID: 38396830 PMCID: PMC10889282 DOI: 10.3390/ijms25042153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
IRF1 is a transcription factor well known for its role in IFN signaling. Although IRF1 was initially identified for its involvement in inflammatory processes, there is now evidence that it provides a function in carcinogenesis as well. IRF1 has been shown to affect several important antitumor mechanisms, such as induction of apoptosis, cell cycle arrest, remodeling of tumor immune microenvironment, suppression of telomerase activity, suppression of angiogenesis and others. Nevertheless, the opposite effects of IRF1 on tumor growth have also been demonstrated. In particular, the "immune checkpoint" molecule PD-L1, which is responsible for tumor immune evasion, has IRF1 as a major transcriptional regulator. These and several other properties of IRF1, including its proposed association with response and resistance to immunotherapy and several chemotherapeutic drugs, make it a promising object for further research. Numerous mechanisms of IRF1 regulation in cancer have been identified, including genetic, epigenetic, transcriptional, post-transcriptional, and post-translational mechanisms, although their significance for tumor progression remains to be explored. This review will focus on the established tumor-suppressive and tumor-promoting functions of IRF1, as well as the molecular mechanisms of IRF1 regulation identified in various cancers.
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Affiliation(s)
- Alina M. Perevalova
- Zelman Institute for the Medicine and Psychology, Novosibirsk State University, Pirogova Street, 1, Novosibirsk 630090, Russia; (A.M.P.)
- Federal Research Center of Fundamental and Translational Medicine, Timakova Street, 2/12, Novosibirsk 630117, Russia
| | - Lyudmila F. Gulyaeva
- Zelman Institute for the Medicine and Psychology, Novosibirsk State University, Pirogova Street, 1, Novosibirsk 630090, Russia; (A.M.P.)
- Federal Research Center of Fundamental and Translational Medicine, Timakova Street, 2/12, Novosibirsk 630117, Russia
| | - Vladimir O. Pustylnyak
- Zelman Institute for the Medicine and Psychology, Novosibirsk State University, Pirogova Street, 1, Novosibirsk 630090, Russia; (A.M.P.)
- Federal Research Center of Fundamental and Translational Medicine, Timakova Street, 2/12, Novosibirsk 630117, Russia
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5
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Ocansey DKW, Qian F, Cai P, Ocansey S, Amoah S, Qian Y, Mao F. Current evidence and therapeutic implication of PANoptosis in cancer. Theranostics 2024; 14:640-661. [PMID: 38169587 PMCID: PMC10758053 DOI: 10.7150/thno.91814] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024] Open
Abstract
Regulated cell death (RCD) is considered a critical pathway in cancer therapy, contributing to eliminating cancer cells and influencing treatment outcomes. The application of RCD in cancer treatment is marked by its potential in targeted therapy and immunotherapy. As a type of RCD, PANoptosis has emerged as a unique form of programmed cell death (PCD) characterized by features of pyroptosis, apoptosis, and necroptosis but cannot be fully explained by any of these pathways alone. It is regulated by a multi-protein complex called the PANoptosome. As a relatively new concept first described in 2019, PANoptosis has been shown to play a role in many diseases, including cancer, infection, and inflammation. This study reviews the application of PCD in cancer, particularly the emergence and implication of PANoptosis in developing therapeutic strategies for cancer. Studies have shown that the characterization of PANoptosis patterns in cancer can predict survival and response to immunotherapy and chemotherapy, highlighting the potential for PANoptosis to be used as a therapeutic target in cancer treatment. It also plays a role in limiting the spread of cancer cells. PANoptosis allows for the elimination of cancer cells by multiple cell death pathways and has the potential to address various challenges in cancer treatment, including drug resistance and immune evasion. Moreover, active investigation of the mechanisms and potential therapeutic agents that can induce PANoptosis in cancer cells is likely to yield effective cancer treatments and improve patient outcomes. Research on PANoptosis is still ongoing, but it is a rapidly evolving field with the potential to lead to new treatments for various diseases, including cancer.
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Affiliation(s)
- Dickson Kofi Wiredu Ocansey
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang 222006, Jiangsu, P.R. China
- Directorate of University Health Services, University of Cape Coast, Cape Coast CC0959347, Central Region, Ghana
| | - Fei Qian
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang 212300, Jiangsu, P.R. China
| | - Peipei Cai
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang 222006, Jiangsu, P.R. China
| | - Stephen Ocansey
- Department of Optometry and Vision Science, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast CC0959347, Central Region, Ghana
| | - Samuel Amoah
- Directorate of University Health Services, University of Cape Coast, Cape Coast CC0959347, Central Region, Ghana
| | - Yingchen Qian
- Department of Pathology, Nanjing Jiangning Hospital, Nanjing 211100, Jiangsu, P.R. China
| | - Fei Mao
- Department of Laboratory Medicine, Lianyungang Clinical College, Jiangsu University, Lianyungang 222006, Jiangsu, P.R. China
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6
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Kopiasz Ł, Dziendzikowska K, Oczkowski M, Harasym J, Gromadzka-Ostrowska J. Low-molar-mass oat beta-glucan impacts autophagy and apoptosis in early stages of induced colorectal carcinogenesis in rats. Int J Biol Macromol 2024; 254:127832. [PMID: 37924897 DOI: 10.1016/j.ijbiomac.2023.127832] [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] [Received: 05/16/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 11/06/2023]
Abstract
Oat beta-glucan is one of the soluble dietary fibre fractions with a wide spectrum of biological activities such as anti-inflammatory and anti-tumour properties. In the present study, the effect of low-molar-mass oat beta-glucan isolate (OβGl) on the level of autophagy and apoptosis in the colorectum of rats with induced early stages of colorectal cancer was investigated. Forty-five male Sprague-Dawley rats were divided into two main groups: control and azoxymethane-induced early-stage colorectal carcinogenesis (CRC). Both groups were divided into three dietary subgroups fed standard feed without OβGl (OβGl-), with 1 % of OβGl (OβGl+1 %) or with 3 % of OβGl (OβGl+3 %). The expression of autophagy (LC3B, beclin-1) and apoptosis (caspase-3, cleaved caspase-3, BAX, BCL-2 and PARP-1) markers was determined by immunohistochemistry, Western blot and PCR analysis. The obtained results showed that the expression of LC3B, caspase-3 and cleaved caspase-3 in the CRC mucosa, and LC3B-II expression in the CRC wall were higher in the OβGl+3 % compared to the OβGl- rats. A higher BAX/BCL-2 ratio was also observed in the CRC OβGl+1 % rats compared to the other CRC animals. In summary, OβGl+3 % has a modulatory effect, stimulating autophagy and the extrinsic apoptosis pathway, while OβGl+1 % has a stimulatory effect on the intrinsic apoptosis pathway.
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Affiliation(s)
- Łukasz Kopiasz
- Department of Dietetics, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland.
| | - Katarzyna Dziendzikowska
- Department of Dietetics, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland.
| | - Michał Oczkowski
- Department of Dietetics, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland.
| | - Joanna Harasym
- Department of Biotechnology and Food Analysis, Wroclaw University of Economics and Business, 53-345 Wroclaw, Poland.
| | - Joanna Gromadzka-Ostrowska
- Department of Dietetics, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland.
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Manetsch P, Böhi F, Nowak K, Leslie Pedrioli DM, Hottiger MO. PARP7-mediated ADP-ribosylation of FRA1 promotes cancer cell growth by repressing IRF1- and IRF3-dependent apoptosis. Proc Natl Acad Sci U S A 2023; 120:e2309047120. [PMID: 38011562 DOI: 10.1073/pnas.2309047120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 10/26/2023] [Indexed: 11/29/2023] Open
Abstract
PARP7 was reported to promote tumor growth in a cell-autonomous manner and by repressing the antitumor immune response. Nevertheless, the molecular mechanism of how PARP7-mediated ADP-ribosylation exerts these effects in cancer cells remains elusive. Here, we identified PARP7 as a nuclear and cysteine-specific mono-ADP-ribosyltransferase that modifies targets critical for regulating transcription, including the AP-1 transcription factor FRA1. Loss of FRA1 ADP-ribosylation via PARP7 inhibition by RBN-2397 or mutation of the ADP-ribosylation site C97 increased FRA1 degradation by the proteasome via PSMC3. The reduction in FRA1 protein levels promoted IRF1- and IRF3-dependent cytokine as well as proapoptotic gene expression, culminating in CASP8-mediated apoptosis. Furthermore, high PARP7 expression was indicative of the PARP7 inhibitor response in FRA1-positive lung and breast cancer cells. Collectively, our findings highlight the connected roles of PARP7 and FRA1 and emphasize the clinical potential of PARP7 inhibitors for FRA1-driven cancers.
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Affiliation(s)
- Patrick Manetsch
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
- Molecular Life Science Ph.D. Program, Life Science Zurich Graduate School, University of Zurich, 8057 Zurich, Switzerland
| | - Flurina Böhi
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
- Cancer Biology Ph.D. Program, Life Science Zurich Graduate School, University of Zurich, 8057 Zurich, Switzerland
| | - Kathrin Nowak
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
| | - Deena M Leslie Pedrioli
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
| | - Michael O Hottiger
- Department of Molecular Mechanisms of Disease, University of Zurich, 8057 Zurich, Switzerland
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8
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Rundberg Nilsson AJ, Xian H, Shalapour S, Cammenga J, Karin M. IRF1 regulates self-renewal and stress responsiveness to support hematopoietic stem cell maintenance. SCIENCE ADVANCES 2023; 9:eadg5391. [PMID: 37889967 PMCID: PMC10610924 DOI: 10.1126/sciadv.adg5391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 09/27/2023] [Indexed: 10/29/2023]
Abstract
Hematopoietic stem cells (HSCs) are tightly controlled to maintain a balance between blood cell production and self-renewal. While inflammation-related signaling is a critical regulator of HSC activity, the underlying mechanisms and the precise functions of specific factors under steady-state and stress conditions remain incompletely understood. We investigated the role of interferon regulatory factor 1 (IRF1), a transcription factor that is affected by multiple inflammatory stimuli, in HSC regulation. Our findings demonstrate that the loss of IRF1 from mouse HSCs significantly impairs self-renewal, increases stress-induced proliferation, and confers resistance to apoptosis. In addition, given the frequent abnormal expression of IRF1 in leukemia, we explored the potential of IRF1 expression level as a stratification marker for human acute myeloid leukemia. We show that IRF1-based stratification identifies distinct cancer-related signatures in patient subgroups. These findings establish IRF1 as a pivotal HSC controller and provide previously unknown insights into HSC regulation, with potential implications to IRF1 functions in the context of leukemia.
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Affiliation(s)
- Alexandra J. S. Rundberg Nilsson
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego, La Jolla, CA, USA
- Division of Molecular Medicine and Gene Therapy, Institution for Laboratory Medicine, Medical Faculty, Lund University, Lund, Sweden
- Lund Stem Cell Center, Medical Faculty, Lund University, Lund, Sweden
| | - Hongxu Xian
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Shabnam Shalapour
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jörg Cammenga
- Division of Molecular Medicine and Gene Therapy, Institution for Laboratory Medicine, Medical Faculty, Lund University, Lund, Sweden
- Lund Stem Cell Center, Medical Faculty, Lund University, Lund, Sweden
| | - Michael Karin
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego, La Jolla, CA, USA
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Mozooni Z, Golestani N, Bahadorizadeh L, Yarmohammadi R, Jabalameli M, Amiri BS. The role of interferon-gamma and its receptors in gastrointestinal cancers. Pathol Res Pract 2023; 248:154636. [PMID: 37390758 DOI: 10.1016/j.prp.2023.154636] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/20/2023] [Accepted: 06/20/2023] [Indexed: 07/02/2023]
Abstract
Gastrointestinal malignancies are the most prevalent type of cancer around the world. Even though numerous studies have evaluated gastrointestinal malignancies, the actual underlying mechanism is still unknown. These tumors have a poor prognosis and are frequently discovered at an advanced stage. Globally, there is an increase in the incidence and mortality of gastrointestinal malignancies, including those of the stomach, esophagus, colon, liver, and pancreas. Growth factors and cytokines are signaling molecules that are part of the tumor microenvironment and play a significant role in the development and spread of malignancies. IFN-γ induce its effects by activation of intracellular molecular networks. The main pathway involved in IFN-γ signaling is the JAK/STAT pathway, which regulates the transcription of hundreds of genes and mediates various biological responses. IFN-γ receptor is composed of two IFN-γR1 chains and two IFN-γR2 chains. Binding to IFN-γ, causes the intracellular domains of IFN-γR2 to oligomerize and transphosphorylate with IFN-γR1 which activates downstream signaling components: JAK1 and JAK2. These activated JAKs phosphorylate the receptor, creating binding sites for STAT1. STAT1 is then phosphorylated by JAK, resulting in the formation of STAT1 homodimers (gamma activated factors or GAFs) that translocate to the nucleus and regulate gene expression. The balance between positive and negative regulation of this pathway is crucial for immune responses and tumorigenesis. In this paper, we evaluate the dynamic roles of IFN- γ and its receptors in gastrointestinal cancers and present evidence that inhibiting IFN- γ signaling may be an effective treatment strategy.
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Affiliation(s)
- Zahra Mozooni
- Institute of Immunology and Infectious Diseases, Antimicrobial Resistance Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Golestani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Leyla Bahadorizadeh
- Institute of Immunology and Infectious Diseases, Antimicrobial Resistance Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Internal Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Reyhaneh Yarmohammadi
- Doctoral Student Carolina University Winston, Salem, NC, USA; Skin and Stem Cell Research Center Tehran University of Medical Sciences, Tehran, Iran
| | | | - Bahareh Shateri Amiri
- Department of Internal Medicine, School of Medicine Hazrat-e Rasool General Hospital, Iran University of Medical Sciences, Tehran, Iran
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Nasimi Shad A, Fanoodi A, Maharati A, Akhlaghipour I, Moghbeli M. Molecular mechanisms of microRNA-301a during tumor progression and metastasis. Pathol Res Pract 2023; 247:154538. [PMID: 37209575 DOI: 10.1016/j.prp.2023.154538] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 05/22/2023]
Abstract
Cancer is known as one of the leading causes of human deaths globally. Late diagnosis is considered as one of the main reasons for the high mortality rate among cancer patients. Therefore, the introduction of early diagnostic tumor markers can improve the efficiency of therapeutic modalities. MicroRNAs (miRNAs) have a key role in regulation of cell proliferation and apoptosis. MiRNAs deregulation has been frequently reported during tumor progressions. Since, miRNAs have a high stability in body fluids; they can be used as the reliable non-invasive tumor markers. Here, we discussed the role of miR-301a during tumor progressions. MiR-301a mainly functions as an oncogene via the modulation of transcription factors, autophagy, epithelial-mesenchymal transition (EMT), and signaling pathways. This review paves the way to suggest miR-301a as a non-invasive marker for the early tumor diagnosis. MiR-301a can also be suggested as an effective target in cancer therapy.
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Affiliation(s)
- Arya Nasimi Shad
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Fanoodi
- Student Research Committee, Faculty of Medicine, Birjand University of Medical Sciences, Mashhad, Iran
| | - Amirhosein Maharati
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iman Akhlaghipour
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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11
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Wang J, Du L, Chen X. Oncolytic virus: A catalyst for the treatment of gastric cancer. Front Oncol 2022; 12:1017692. [PMID: 36505792 PMCID: PMC9731121 DOI: 10.3389/fonc.2022.1017692] [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: 08/12/2022] [Accepted: 11/02/2022] [Indexed: 11/25/2022] Open
Abstract
Gastric cancer (GC) is a leading contributor to global cancer incidence and mortality. According to the GLOBOCAN 2020 estimates of incidence and mortality for 36 cancers in 185 countries produced by the International Agency for Research on Cancer (IARC), GC ranks fifth and fourth, respectively, and seriously threatens the survival and health of people all over the world. Therefore, how to effectively treat GC has become an urgent problem for medical personnel and scientific workers at this stage. Due to the unobvious early symptoms and the influence of some adverse factors such as tumor heterogeneity and low immunogenicity, patients with advanced gastric cancer (AGC) cannot benefit significantly from treatments such as radical surgical resection, radiotherapy, chemotherapy, and targeted therapy. As an emerging cancer immunotherapy, oncolytic virotherapies (OVTs) can not only selectively lyse cancer cells, but also induce a systemic antitumor immune response. This unique ability to turn unresponsive 'cold' tumors into responsive 'hot' tumors gives them great potential in GC therapy. This review integrates most experimental studies and clinical trials of various oncolytic viruses (OVs) in the diagnosis and treatment of GC. It also exhaustively introduces the concrete mechanism of invading GC cells and the viral genome composition of adenovirus and herpes simplex virus type 1 (HSV-1). At the end of the article, some prospects are put forward to determine the developmental directions of OVTs for GC in the future.
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Affiliation(s)
- Junqing Wang
- School of the 1st Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Linyong Du
- Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, China,*Correspondence: Xiangjian Chen, ; Linyong Du,
| | - Xiangjian Chen
- School of the 1st Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China,*Correspondence: Xiangjian Chen, ; Linyong Du,
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12
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Zhu W, Tan L, Ma T, Yin Z, Gao J. Long noncoding RNA SNHG8 promotes chemoresistance in gastric cancer via binding with hnRNPA1 and stabilizing TROY expression. Dig Liver Dis 2022; 54:1573-1582. [PMID: 35354542 DOI: 10.1016/j.dld.2022.02.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/30/2022]
Abstract
AIMS To determine SNHG8's function and potential mechanisms in gastric cancer (GC) chemoresistance. METHODS We assessed SNHG8 expression in GC cell lines, GC/CDDP cell lines (cell lines treated with cisplatin), and 42 GC tissues and SNHG8 levels in the lncRNA microarray analysis of AGS/CDDP and AGS cell lines. We also examined GC cell viability in vivo and in vitro and its apoptosis level with Flow cytometry assays. SNHG8 was localized in subcells using fluorescence in situ hybridization (FISH) and cell fraction assays, hnRNPA1's link to SNHG8 was determined utilizing RNA immunoprecipitation (RIP) and FISH assays, gene expression profiles were assessed employing RNA transcriptome sequencing, and hnRNPA1's relationship with TROY was ascertained with the RIP assay. RESULTS SNHG8 increased significantly in GC cell lines and GC tissues. However, a decrease in its expression promoted sensitivity to chemotherapy and inhibited DNA damage repair in vitro and in vivo. SNHG8 appeared to regulate TROY expression via linking with hnRNPA1. Reducing TROY levels considerably stimulated GC cell chemosensitivity, whereas heightening them partially rescued the rate of chemoresistance caused by downregulating SNHG8. CONCLUSION In summary, the "SNHG8/hnRNPA1-TROY" axis is crucial to GC chemoresistance.
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Affiliation(s)
- Wenzhong Zhu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Lulu Tan
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Tiantian Ma
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zhijie Yin
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jinbo Gao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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13
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Parker J, Roth O. Comparative assessment of immunological tolerance in fish with natural immunodeficiency. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2022; 132:104393. [PMID: 35276317 DOI: 10.1016/j.dci.2022.104393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/24/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Natural occurrences of immunodeficiency by definition should lead to compromised immune function. The major histocompatibility complexes (MHC) are key components of the vertebrate adaptive immune system, charged with mediating allorecognition and antigen presentation functions. To this end, the genomic loss of the MHC II pathway in Syngnathus pipefishes raises questions regarding their immunological vigilance and allorecognition capabilities. Utilising allograft and autograft fin-transplants, we compared the allorecognition immune responses of two pipefish species, with (Nerophis ophidion) and without (Syngnathus typhle) a functional MHC II. Transcriptome-wide assessments explored the immunological tolerance and potential compensatory measures occupying the role of the absent MHC II. Visual observations suggested a more acute rejection response in N. ophidion allografts compared with S. typhle allografts. Differentially expressed genes involved in innate immunity, angiogenesis and tissue recovery were identified among transplantees. The intriguing upregulation of the cytotoxic T-cell implicated gzma in S. typhle allografts, suggests a prominent MHC I related response, which may compensate for the MHC II and CD4 loss. MHC I related downregulation in N. ophidion autografts hints at an immunological tolerance related reaction. These findings may indicate alternative measures evolved to cope with the MHC II genomic loss enabling the maintenance of appropriate tolerance levels. This study provides intriguing insights into the immune and tissue recovery mechanisms associated with syngnathid transplantation, and can be a useful reference for future studies focusing on transplantation transcriptomics in non-model systems.
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Affiliation(s)
- Jamie Parker
- Marine Evolutionary Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, D-24105, Kiel, Germany; Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany.
| | - Olivia Roth
- Marine Evolutionary Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, D-24105, Kiel, Germany; Marine Evolutionary Biology, Christian-Albrechts-University, D-24118, Kiel, Germany
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14
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Porazzi P, Petruk S, Pagliaroli L, De Dominici M, Deming D, Puccetti MV, Kushinsky S, Kumar G, Minieri V, Barbieri E, Deliard S, Grande A, Trizzino M, Gardini A, Canaani E, Palmisiano N, Porcu P, Ertel A, Fortina PM, Eischen CM, Mazo A, Calabretta B. Targeting chemotherapy to de-condensed H3K27me3-marked chromatin of AML cells enhances leukemia suppression. Cancer Res 2021; 82:458-471. [PMID: 34903608 DOI: 10.1158/0008-5472.can-21-1297] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 09/15/2021] [Accepted: 12/03/2021] [Indexed: 11/16/2022]
Abstract
Despite treatment with intensive chemotherapy, acute myeloid leukemia (AML) remains an aggressive malignancy with a dismal outcome in most patients. We found that AML cells exhibit an unusually rapid accumulation of the repressive histone mark H3K27me3 on nascent DNA. In cell lines, primary cells and xenograft mouse models, inhibition of the H3K27 histone methyltransferase EZH2 to de-condense the H3K27me3-marked chromatin of AML cells enhanced chromatin accessibility and chemotherapy-induced DNA damage, apoptosis, and leukemia suppression. These effects were further promoted when chromatin de-condensation of AML cells was induced upon S-phase entry after release from a transient G1 arrest mediated by CDK4/6 inhibition. In the p53-null KG-1 and THP-1 AML cell lines, EZH2 inhibitor and doxorubicin co-treatment induced transcriptional reprogramming that was, in part, dependent on de-repression of H3K27me3-marked gene promoters and led to increased expression of cell death-promoting and growth-inhibitory genes. In conclusion, decondensing H3K27me3-marked chromatin by EZH2 inhibition represents a promising approach to improve the efficacy of DNA-damaging cytotoxic agents in AML patients. This strategy might allow for a lowering of chemotherapy doses with a consequent reduction of treatment-related side effects in elderly AML patients or those with significant comorbidities.
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Affiliation(s)
- Patrizia Porazzi
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University
| | - Svetlana Petruk
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center,, Thomas Jefferson University
| | - Luca Pagliaroli
- Department of Biochemistry and Molecular Biology and Sidney Kimmel Cancer Center,, Thomas Jefferson University
| | | | - David Deming
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center,, Thomas Jefferson University
| | - Matthew V Puccetti
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University
| | - Saul Kushinsky
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University
| | - Gaurav Kumar
- Department of Cancer Biology, Thomas Jefferson University
| | - Valentina Minieri
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University
| | - Elisa Barbieri
- Gene Expression and Regulation Program, The Wistar Institute
| | - Sandra Deliard
- Gene Expression and Regulation Program, The Wistar Institute
| | - Alexis Grande
- Department of Life Sciences, University of Modena and Reggio Emilia
| | - Marco Trizzino
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center,, Thomas Jefferson University
| | | | - Eli Canaani
- The Department of Molecular Cell Biology, Weizmann Institute of Science
| | | | | | - Adam Ertel
- Department of Cancer Biology, Thomas Jefferson University
| | | | | | - Alexander Mazo
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center,, Thomas Jefferson University
| | - Bruno Calabretta
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University
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15
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Chen S, Lóssio CF, Verbeke I, Verduijn J, Parakhonskiy B, Van der Meeren L, Chen P, De Zaeytijd J, Skirtach AG, Van Damme EJM. The type-1 ribosome-inactivating protein OsRIP1 triggers caspase-independent apoptotic-like death in HeLa cells. Food Chem Toxicol 2021; 157:112590. [PMID: 34601042 DOI: 10.1016/j.fct.2021.112590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/04/2021] [Accepted: 09/29/2021] [Indexed: 01/07/2023]
Abstract
Ribosome-inactivating proteins (RIPs) are capable of removing a specific adenine from 28S ribosomal RNA, thus inhibiting protein biosynthesis in an irreversible manner. In this study, recombinant OsRIP1, a type 1 RIP from rice (Oryza sativa L.), was investigated for its anti-proliferative properties. Human cervical cancer HeLa cells were incubated in the presence of OsRIP1 for 24-72 h. OsRIP1 treatment yielded an anti-proliferation response of the HeLa cells and resulted in apoptotic-like blebbing of the plasma membrane without causing DNA fragmentation. OsRIP1 labeled with FITC accumulated at the cell surface. Pull-down assays identified ASPP1 (Apoptosis-Stimulating Protein of p53 1) and IFITM3 (interferon-induced transmembrane protein 3) as potential interaction partners for OsRIP1. Transcript levels for several critical genes related to different signaling pathways were quantified by RT-qPCR. OsRIP1 provoked HeLa cells to undergo caspase-independent cell death, associated with a significant transcriptional upregulation of the apoptotic gene PUMA, interferon regulatory factor 1 (IRF1) and the autophagy-related marker LC3. No changes in caspase activities were observed. Together, these data suggest that apoptotic-like events were involved in OsRIP1-driven caspase-independent cell death that might trigger the IRF1 signaling pathway and LC3-mediated autophagy.
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Affiliation(s)
- Simin Chen
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Cláudia Figueiredo Lóssio
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium; Department of Biochemistry and Molecular Biology, The Federal University of Ceará, Fortaleza, Ceará, 2853, Brazil
| | - Isabel Verbeke
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Joost Verduijn
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Bogdan Parakhonskiy
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Louis Van der Meeren
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Pengyu Chen
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium; Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Jeroen De Zaeytijd
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - André G Skirtach
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium; Center for Advanced Light Microscopy, Ghent University, 9000, Ghent, Belgium
| | - Els J M Van Damme
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium; Center for Advanced Light Microscopy, Ghent University, 9000, Ghent, Belgium.
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16
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Woznicki JA, Saini N, Flood P, Rajaram S, Lee CM, Stamou P, Skowyra A, Bustamante-Garrido M, Regazzoni K, Crawford N, McDade SS, Longley DB, Aza-Blanc P, Shanahan F, Zulquernain SA, McCarthy J, Melgar S, McRae BL, Nally K. TNF-α synergises with IFN-γ to induce caspase-8-JAK1/2-STAT1-dependent death of intestinal epithelial cells. Cell Death Dis 2021; 12:864. [PMID: 34556638 PMCID: PMC8459343 DOI: 10.1038/s41419-021-04151-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 08/16/2021] [Accepted: 09/08/2021] [Indexed: 12/25/2022]
Abstract
Rewiring of host cytokine networks is a key feature of inflammatory bowel diseases (IBD) such as Crohn's disease (CD). Th1-type cytokines-IFN-γ and TNF-α-occupy critical nodes within these networks and both are associated with disruption of gut epithelial barrier function. This may be due to their ability to synergistically trigger the death of intestinal epithelial cells (IECs) via largely unknown mechanisms. In this study, through unbiased kinome RNAi and drug repurposing screens we identified JAK1/2 kinases as the principal and nonredundant drivers of the synergistic killing of human IECs by IFN-γ/TNF-α. Sensitivity to IFN-γ/TNF-α-mediated synergistic IEC death was retained in primary patient-derived intestinal organoids. Dependence on JAK1/2 was confirmed using genetic loss-of-function studies and JAK inhibitors (JAKinibs). Despite the presence of biochemical features consistent with canonical TNFR1-mediated apoptosis and necroptosis, IFN-γ/TNF-α-induced IEC death was independent of RIPK1/3, ZBP1, MLKL or caspase activity. Instead, it involved sustained activation of JAK1/2-STAT1 signalling, which required a nonenzymatic scaffold function of caspase-8 (CASP8). Further modelling in gut mucosal biopsies revealed an intercorrelated induction of the lethal CASP8-JAK1/2-STAT1 module during ex vivo stimulation of T cells. Functional studies in CD-derived organoids using inhibitors of apoptosis, necroptosis and JAKinibs confirmed the causative role of JAK1/2-STAT1 in cytokine-induced death of primary IECs. Collectively, we demonstrate that TNF-α synergises with IFN-γ to kill IECs via the CASP8-JAK1/2-STAT1 module independently of canonical TNFR1 and cell death signalling. This non-canonical cell death pathway may underpin immunopathology driven by IFN-γ/TNF-α in diverse autoinflammatory diseases such as IBD, and its inhibition may contribute to the therapeutic efficacy of anti-TNFs and JAKinibs.
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Affiliation(s)
| | - Nisha Saini
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Peter Flood
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Ciaran M Lee
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | | | | | | | - Nyree Crawford
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Simon S McDade
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Daniel B Longley
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - Pedro Aza-Blanc
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Fergus Shanahan
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Medicine, University College Cork, Cork, Ireland
| | - Syed A Zulquernain
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Medicine, University College Cork, Cork, Ireland
| | - Jane McCarthy
- Department of Gastroenterology, Mercy University Hospital, Cork, Ireland
| | - Silvia Melgar
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Bradford L McRae
- Immunology Discovery, Abbvie Bioresearch Center, Worcester, MA, 01605, USA
| | - Ken Nally
- APC Microbiome Ireland, University College Cork, Cork, Ireland. .,School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland.
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17
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T0901317, an Agonist of Liver X Receptors, Attenuates Neuronal Apoptosis in Early Brain Injury after Subarachnoid Hemorrhage in Rats via Liver X Receptors/Interferon Regulatory Factor/P53 Upregulated Modulator of Apoptosis/Dynamin-1-Like Protein Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8849131. [PMID: 34194609 PMCID: PMC8181056 DOI: 10.1155/2021/8849131] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/29/2020] [Accepted: 05/12/2021] [Indexed: 12/28/2022]
Abstract
Methods Subarachnoid hemorrhage (SAH) models of Sprague-Dawley rats were established with perforation method. T0901317 was injected intraperitoneally 1-hour post-SAH. GSK2033, an inhibitor of LXRs, and interferon regulatory factor (IRF-1) CRISPR activation were injected intracerebroventricularly to evaluate potential signaling pathway. The severity of SAH, neurobehavior test in both short- and long-term and apoptosis was measured with Western blot and immunofluorescence staining. Results Expression of LXR-α and IRF-1 increased and peaked at 24 h post-SAH, while LXR-β remained unaffected in SAH+vehicle group compared with Sham group. Post-SAH T0901317 treatment attenuated neuronal impairments in both short- and long-term and decreased neuronal apoptosis, the expression of IRF-1, P53 upregulated modulator of apoptosis (PUMA), dynamin-1-like protein (Drp1), Bcl-2-associated X protein (Bax) and cleaved caspase-3, and increasing B-cell lymphoma 2 (Bcl-2) at 24 h from modeling. GSK2033 inhibited LXRs and reversed T0901317's neuroprotective effects. IRF-1 CRISPR activation upregulated the expression of IRF-1 and abolished the treatment effects of T0901317. Conclusion T0901317 attenuated neuronal apoptosis via LXRs/IRF-1/PUMA/Drp1 pathway in SAH rats.
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18
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Therapeutic Implications of a Polymethoxylated Flavone, Tangeretin, in the Management of Cancer via Modulation of Different Molecular Pathways. Adv Pharmacol Pharm Sci 2021; 2021:4709818. [PMID: 33748757 PMCID: PMC7954633 DOI: 10.1155/2021/4709818] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/25/2021] [Accepted: 02/25/2021] [Indexed: 12/27/2022] Open
Abstract
Chemotherapeutics can induce oxidative stress, inflammation, apoptosis, mitochondrial dysfunction, and abnormalities in neurotransmitter metabolism leading to toxicity. Because there have been no therapeutic strategies developed to target inflammation and oxidative stress, there is a continuing need for new and improved therapy. As a result, there has been increasing interest in complementary and alternative medicine with anticancer potential. Studies have shown that the antioxidant activities and anti-inflammatory effects of citrus fruits are promising natural phytochemicals in the development of new anticancer agents. Tangeretin is a naturally polymethoxylated flavone compound extracted from the citrus peel that has shown significant intestinal absorption and adequate bioavailability, with the added benefit of promoting longevity. In addition, tangeretin is known to exhibit considerable selective toxicity to many types of cancer cell proliferation such as ovarian, brain, blood, and skin cancer. Evidence indicates that tangeretin acts through several mechanisms including growth inhibition, induction of apoptosis, autophagy, antiangiogenesis, and estrogenic-like effects. Furthermore, tangeretin works through mitigating levels of inflammatory mediators in the immune system. Using tangeretin in combination with clinically applied anticancer drugs could be a good strategy for increasing the efficiency of these agents and protecting noncancerous cells from damage caused by chemotherapy. The purpose of this review is to highlight the protective effects of a novel natural product, tangeretin against chemotherapeutic-induced toxicity. The development of chemoprevention strategies can lead to significant health care improvement in cancer survivors. Thus, study outcomes may attract more investigators to conduct tangeretin-related research and find out potentially significant impacts on health care of cancer patients and decreased health problems associated with chemotherapeutics-induced toxicity.
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19
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Tian X, Ahsan N, Lulla A, Lev A, Abbosh P, Dicker DT, Zhang S, El-Deiry WS. P53-independent partial restoration of the p53 pathway in tumors with mutated p53 through ATF4 transcriptional modulation by ERK1/2 and CDK9. Neoplasia 2021; 23:304-325. [PMID: 33582407 PMCID: PMC7890376 DOI: 10.1016/j.neo.2021.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/20/2021] [Accepted: 01/25/2021] [Indexed: 12/17/2022] Open
Abstract
A long-term goal in the cancer-field has been to develop strategies for treating p53-mutated tumors. A novel small-molecule, PG3-Oc, restores p53 pathway-signaling in tumor cells with mutant-p53, independently of p53/p73. PG3-Oc partially upregulates the p53-transcriptome (13.7% of public p53 target-gene dataset; 15.2% of in-house dataset) and p53-proteome (18%, HT29; 16%, HCT116-p53−/−). Bioinformatic analysis indicates critical p53-effectors of growth-arrest (p21), apoptosis (PUMA, DR5, Noxa), autophagy (DRAM1), and metastasis-suppression (NDRG1) are induced by PG3-Oc. ERK1/2- and CDK9-kinases are required to upregulate ATF4 by PG3-Oc which restores p53 transcriptomic-targets in cells without functional-p53. PG3-Oc represses MYC (ATF4-independent), and upregulates PUMA (ATF4-dependent) in mediating cell death. With largely nonoverlapping transcriptomes, induced-ATF4 restores p53 transcriptomic targets in drug-treated cells including functionally important mediators such as PUMA and DR5. Our results demonstrate novel p53-independent drug-induced molecular reprogramming involving ERK1/2, CDK9, and ATF4 to restore upregulation of p53 effector genes required for cell death and tumor suppression.
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Affiliation(s)
- Xiaobing Tian
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, The Warren Alpert Medical School, Brown University, Providence, RI, USA; The Joint Program in Cancer Biology, Brown University and Lifespan Health System, Providence, RI, USA; Department of Pathology and Laboratory Medicine, Brown University Alpert Medical School, Providence, RI, USA; Division of Biology and Medicine, Brown University, Providence, RI, USA; Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Nagib Ahsan
- The Joint Program in Cancer Biology, Brown University and Lifespan Health System, Providence, RI, USA; COBRE Center for Cancer Research Development, Proteomics Core Facility, Rhode Island Hospital, Providence, RI, USA; Division of Biology and Medicine, Brown University, Providence, RI, USA
| | - Amriti Lulla
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Avital Lev
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Philip Abbosh
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - David T Dicker
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, The Warren Alpert Medical School, Brown University, Providence, RI, USA; The Joint Program in Cancer Biology, Brown University and Lifespan Health System, Providence, RI, USA; Department of Pathology and Laboratory Medicine, Brown University Alpert Medical School, Providence, RI, USA; Division of Biology and Medicine, Brown University, Providence, RI, USA; Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Shengliang Zhang
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, The Warren Alpert Medical School, Brown University, Providence, RI, USA; The Joint Program in Cancer Biology, Brown University and Lifespan Health System, Providence, RI, USA; Department of Pathology and Laboratory Medicine, Brown University Alpert Medical School, Providence, RI, USA; Division of Biology and Medicine, Brown University, Providence, RI, USA; Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Wafik S El-Deiry
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, The Warren Alpert Medical School, Brown University, Providence, RI, USA; The Joint Program in Cancer Biology, Brown University and Lifespan Health System, Providence, RI, USA; Department of Pathology and Laboratory Medicine, Brown University Alpert Medical School, Providence, RI, USA; Division of Biology and Medicine, Brown University, Providence, RI, USA; Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA; Hematology-Oncology Division, Department of Medicine, Rhode Island Hospital and Brown University, Providence, RI, USA.
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20
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Shen Y, Sun Z, Mao S, Zhang Y, Jiang W, Wang H. IRF-1 contributes to the pathological phenotype of VSMCs during atherogenesis by increasing CCL19 transcription. Aging (Albany NY) 2020; 13:933-943. [PMID: 33424012 PMCID: PMC7835033 DOI: 10.18632/aging.202204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/20/2020] [Indexed: 02/03/2023]
Abstract
Atherosclerosis (AS) is a chronic inflammatory disease that mainly involves the large and middle arteries, but the specific mechanism is not precise. Chemokine ligand 19 (CCL19) has been reported highly expressed in peripheral blood of patients with atherosclerosis, but its role lacks explicit data. By ELISA assay and immunohistochemical (IHC) analysis, we found that the CCL19 was significantly up-regulated in AS. Therefore, we tried to clarify whether CCL19 expression was related to the progression of AS. QRT-PCR and western blot demonstrated that overexpression of CCL19 promoted the secretion of inflammatory factors and the deposition of the extracellular matrix, and facilitated the proliferation and migration of VSMCS. Besides, knockdown of CCL19 reduced the inflammation, collagen secretion, proliferation and migration of VSMCS induced by PGDF-BB. The results of database analysis, chromatin immunoprecipitation (ChIP) and luciferase assay showed that interferon regulatory factor 1 (IRF-1) activated the expression of CCL19 at the transcriptional level. Importantly, silencing IRF-1 inhibited atherosclerosis in high-fat-fed mice, inhibited the proliferation and migration of VSMCS, and down-regulated the expression of CCL19. Summing up, the results demonstrated that IRF-1 contributed to the pathological phenotype of VSMCs during atherogenesis by increasing CCL19 transcription.
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Affiliation(s)
- Yongbin Shen
- Department of Vascular Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Zhanfeng Sun
- Department of Vascular Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Shuran Mao
- Department of Plastic Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Yingnan Zhang
- Department of Vascular Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Weiliang Jiang
- Department of Vascular Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Haitao Wang
- Department of Vascular Surgery, The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, China
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21
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Rho SB, Lee SH, Byun HJ, Kim BR, Lee CH. IRF-1 Inhibits Angiogenic Activity of HPV16 E6 Oncoprotein in Cervical Cancer. Int J Mol Sci 2020; 21:ijms21207622. [PMID: 33076322 PMCID: PMC7589982 DOI: 10.3390/ijms21207622] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/13/2020] [Indexed: 12/15/2022] Open
Abstract
HPV16 E6 oncoprotein is a member of the human papillomavirus (HPV) family that contributes to enhanced cellular proliferation and risk of cervical cancer progression via viral infection. In this study, interferon regulatory factor-1 (IRF-1) regulates cell growth inhibition and transcription factors in immune response, and acts as an HPV16 E6-binding cellular molecule. Over-expression of HPV16 E6 elevated cell growth by attenuating IRF-1-induced apoptosis and repressing p21 and p53 expression, but activating cyclin D1 and nuclear factor kappa B (NF-κB) expression. The promoter activities of p21 and p53 were suppressed, whereas NF-κB activities were increased by HPV16 E6. Additionally, the cell viability of HPV16 E6 was diminished by IRF-1 in a dose-dependent manner. We found that HPV16 E6 activated vascular endothelial growth factor (VEGF)-induced endothelial cell migration and proliferation as well as phosphorylation of VEGFR-2 via direct interaction in vitro. HPV16 E6 exhibited potent pro-angiogenic activity and clearly enhanced the levels of hypoxia-inducible factor-1α (HIF-1α). By contrast, the loss of function of HPV16 E6 by siRNA-mediated knockdown inhibited the cellular events. These data provide direct evidence that HPV16 E6 facilitates tumour growth and angiogenesis. HPV16 E6 also activates the PI3K/mTOR signalling cascades, and IRF-1 suppresses HPV16 E6-induced tumourigenesis and angiogenesis. Collectively, these findings suggest a biological mechanism underlying the HPV16 E6-related activity in cervical tumourigenesis.
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Affiliation(s)
- Seung Bae Rho
- Division of Translational Science, Research Institute, National Cancer Center, Goyang, Gyeonggido 411-769, Korea;
| | - Seung-Hoon Lee
- Department of Life Science, Yong In University, Yongin, Gyeonggido 449-714, Korea;
| | - Hyun-Jung Byun
- Phamaceutical Biochemistry, College of Pharmacy and Integrated Research Institute for Drug, Dongguk University, Goyang 100-715, Korea;
| | - Boh-Ram Kim
- Phamaceutical Biochemistry, College of Pharmacy and Integrated Research Institute for Drug, Dongguk University, Goyang 100-715, Korea;
- Correspondence: (B.-R.K.); (C.H.L.); Tel.: +82-31-961-5213 (B.-R.K. & C.H.L.)
| | - Chang Hoon Lee
- Phamaceutical Biochemistry, College of Pharmacy and Integrated Research Institute for Drug, Dongguk University, Goyang 100-715, Korea;
- Correspondence: (B.-R.K.); (C.H.L.); Tel.: +82-31-961-5213 (B.-R.K. & C.H.L.)
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22
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Constantinou C, Miranda AMA, Chaves P, Bellahcene M, Massaia A, Cheng K, Samari S, Rothery SM, Chandler AM, Schwarz RP, Harding SE, Punjabi P, Schneider MD, Noseda M. Human pluripotent stem cell-derived cardiomyocytes as a target platform for paracrine protection by cardiac mesenchymal stromal cells. Sci Rep 2020; 10:13016. [PMID: 32747668 PMCID: PMC7400574 DOI: 10.1038/s41598-020-69495-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 05/22/2020] [Indexed: 12/14/2022] Open
Abstract
Ischemic heart disease remains the foremost cause of death globally, with survivors at risk for subsequent heart failure. Paradoxically, cell therapies to offset cardiomyocyte loss after ischemic injury improve long-term cardiac function despite a lack of durable engraftment. An evolving consensus, inferred preponderantly from non-human models, is that transplanted cells benefit the heart via early paracrine signals. Here, we tested the impact of paracrine signals on human cardiomyocytes, using human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) as the target of mouse and human cardiac mesenchymal stromal cells (cMSC) with progenitor-like features. In co-culture and conditioned medium studies, cMSCs markedly inhibited human cardiomyocyte death. Little or no protection was conferred by mouse tail tip or human skin fibroblasts. Consistent with the results of transcriptomic profiling, functional analyses showed that the cMSC secretome suppressed apoptosis and preserved cardiac mitochondrial transmembrane potential. Protection was independent of exosomes under the conditions tested. In mice, injecting cMSC-conditioned media into the infarct border zone reduced apoptotic cardiomyocytes > 70% locally. Thus, hPSC-CMs provide an auspicious, relevant human platform to investigate extracellular signals for cardiac muscle survival, substantiating human cardioprotection by cMSCs, and suggesting the cMSC secretome or its components as potential cell-free therapeutic products.
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Affiliation(s)
- Chrystalla Constantinou
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
| | - Antonio M A Miranda
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Patricia Chaves
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Mohamed Bellahcene
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Andrea Massaia
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Kevin Cheng
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
| | - Sara Samari
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Stephen M Rothery
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
| | - Anita M Chandler
- Kardia Therapeutics, Houston, TX, 77030, USA
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, TX, 77005, USA
| | - Richard P Schwarz
- Kardia Therapeutics, Houston, TX, 77030, USA
- CV Ventures, LLC, Blue Bell, PA, 19422, USA
| | - Sian E Harding
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
| | - Prakash Punjabi
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK
- Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, W12 0HS, UK
| | - Michael D Schneider
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK.
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK.
| | - Michela Noseda
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, UK.
- British Heart Foundation Centre for Research Excellence and Centre for Regenerative Medicine, Imperial College London, London, W12 0NN, UK.
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23
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Identification of STXBP6-IRF1 positive feedback loop in regulation of PD-L1 in cancer. Cancer Immunol Immunother 2020; 70:275-287. [PMID: 32700091 DOI: 10.1007/s00262-020-02678-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/17/2020] [Indexed: 02/06/2023]
Abstract
The clinical success of immune checkpoint blockade against diverse human cancers highlights the critical importance of insightful understanding into mechanisms underlying PD-L1 regulation. IFN-γ released by intratumoral lymphocytes regulates PD-L1 expression in tumor cells through JAK-STAT-IRF1 pathway, while the molecular events prime IRF1 to translocate into nucleus are still obscure. Here we identified STXBP6, previously recognized involving in SNARE complex assembly, negatively regulates PD-L1 transcription via retention of IRF1 in cytoplasm. IFN-γ exposure stimulates accumulation of cytosolic IRF1, which eventually saturates STXBP6 and triggers nuclear translocation of IRF1. Nuclear IRF1 in turn inhibits STXBP6 expression and thereby liberates more IRF1 to migrate to nucleus. Therefore, we identified a novel positive feedback loop between STXBP6 and IRF1 in regulation of PD-L1 expression in cancer. Furthermore, we demonstrate STXBP6 overexpression significantly inhibits T cell activation both in vitro and in vivo. These findings offer new insight into the complexity of PD-L1 expression in cancer and suggest a valuable measure to predict the response to PD-1/PD-L1-based immunotherapy.
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24
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Karki R, Sharma BR, Lee E, Banoth B, Malireddi RKS, Samir P, Tuladhar S, Mummareddy H, Burton AR, Vogel P, Kanneganti TD. Interferon regulatory factor 1 regulates PANoptosis to prevent colorectal cancer. JCI Insight 2020; 5:136720. [PMID: 32554929 DOI: 10.1172/jci.insight.136720] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/20/2020] [Indexed: 12/11/2022] Open
Abstract
Interferon regulatory factor 1 (IRF1) regulates diverse biological functions, including modulation of cellular responses involved in tumorigenesis. Genetic mutations and altered IRF1 function are associated with several cancers. Although the function of IRF1 in the immunobiology of cancer is emerging, IRF1-specific mechanisms regulating tumorigenesis and tissue homeostasis in vivo are not clear. Here, we found that mice lacking IRF1 were hypersusceptible to colorectal tumorigenesis. IRF1 functions in both the myeloid and epithelial compartments to confer protection against AOM/DSS-induced colorectal tumorigenesis. We further found that IRF1 also prevents tumorigenesis in a spontaneous mouse model of colorectal cancer. The attenuated cell death in the colons of Irf1-/- mice was due to defective pyroptosis, apoptosis, and necroptosis (PANoptosis). IRF1 does not regulate inflammation and the inflammasome in the colon. Overall, our study identified IRF1 as an upstream regulator of PANoptosis to induce cell death during colitis-associated tumorigenesis.
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Affiliation(s)
- Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Bhesh Raj Sharma
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Ein Lee
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.,Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Balaji Banoth
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - R K Subbarao Malireddi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Parimal Samir
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Shraddha Tuladhar
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Harisankeerth Mummareddy
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.,Emory College of Arts and Sciences, Emory University, Atlanta, Georgia, USA
| | - Amanda R Burton
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Peter Vogel
- Animal Resources Center and Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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25
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Du Q, Luo J, Yang MQ, Liu Q, Heres C, Yan YH, Stolz D, Geller DA. iNOS/NO is required for IRF1 activation in response to liver ischemia-reperfusion in mice. Mol Med 2020; 26:56. [PMID: 32517688 PMCID: PMC7285570 DOI: 10.1186/s10020-020-00182-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/02/2020] [Indexed: 12/17/2022] Open
Abstract
Background Ischemia and reperfusion (I/R) induces cytokines, and up-regulates inducible nitric oxide synthase (iNOS), interferon regulatory factor-1(IRF1) and p53 up-regulated modulator of apoptosis (PUMA), which contribute to cell death and tissue injury. However, the mechanisms that I/R induces IRF1-PUMA through iNOS/NO is still unknown. Methods Ischemia was induced by occluding structures in the portal triad (hepatic artery, portal vein, and bile duct) to the left and median liver lobes for 60 min, and reperfusion was initiated by removal of the clamp. Induction of iNOS, IRF1 and PUMA in response to I/R were analyzed. I/R induced IRF1 and PUMA expression were compared between iNOS wild-type and iNOS knockout (KO) mice. Human iNOS gene transfected-cells were used to determine iNOS/NO signals targeting IRF1. To test whether HDAC2 was involved in the mediation of iNOS/NO-induced IRF1 transcriptional activities and its target gene (PUMA and p21) expression, NO donors were used in vitro and in vivo. Results IRF1 nuclear translocation and PUMA transcription elevation were markedly induced following I/R in the liver of iNOS wild-type mice compared with that in knock-out mice. Furthermore, I/R induced hepatic HDAC2 expression and activation, and decreased H3AcK9 expression in iNOS wild-type mice, but not in the knock-out mice. Mechanistically, over-expression of human iNOS gene increased IRF1 transcriptional activity and PUMA expression, while iNOS inhibitor L-NIL reversed these effects. Cytokine-induced PUMA through IRF1 was p53 dependent. IRF1 and p53 synergistically up-regulated PUMA expression. iNOS/NO-induced HDAC2 mediated histone H3 deacetylation and promoted IRF1 transcriptional activity. Moreover, treating the cells with romidepsin, an HDAC1/2 inhibitor decreased NO-induced IRF1 and PUMA expression. Conclusions This study demonstrates a novel mechanism that iNOS/NO is required for IRF1/PUMA signaling through a positive-feedback loop between iNOS and IRF1, in which HDAC2-mediated histone modification is involved to up-regulate IRF1 in response to I/R in mice.
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Affiliation(s)
- Qiang Du
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA
| | - Jing Luo
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA.,Department of Surgery, The Second Xiangya Hospital of Central South University, 139 Renmin Middle Road, Changsha, Hunan, People's Republic of China, 410011
| | - Mu-Qing Yang
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA.,Department of Surgery, Shanghai Tenth People's Hospital, Tenth People's Hospital of Tongji University, 301 Middle Yanchang Road, Shanghai, 200072, People's Republic of China
| | - Quan Liu
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA.,Southern University of Science and Technology, School of Medicine, 1088 Xueyuan Blvd. , Nanshan District, Shenzhen, Guangdong, People's Republic of China, 518055
| | - Caroline Heres
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA
| | - Yi-He Yan
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA
| | - Donna Stolz
- Department of Cellular Biology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - David A Geller
- Thomas E. Starzl Transplant Institute, Department of Surgery, University of Pittsburgh, 3471 Fifth Avenue, Kaufmann Medical Building, Suite 300, Pittsburgh, PA, 15213, USA.
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26
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Dong K, Du Q, Cui X, Wan P, Kaltenmeier C, Luo J, Yan B, Yan Y, Geller DA. MicroRNA-301a (miR-301a) is induced in hepatocellular carcinoma (HCC) and down- regulates the expression of interferon regulatory factor-1. Biochem Biophys Res Commun 2020; 524:273-279. [PMID: 31987500 PMCID: PMC7857543 DOI: 10.1016/j.bbrc.2020.01.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/05/2020] [Indexed: 12/21/2022]
Abstract
Hepatocellular carcinoma (HCC) tumors evade death in part by downregulating expression of the tumor suppressor gene Interferon regulatory factor-1 (IRF-1). However, the molecular mechanisms accounting for IRF-1 suppression in HCC have not been well described. In this study, we identified a novel microRNA-301a (miR-301a) binding site in the 3'-untranslated region (3'- UTR) of the human IRF-1 gene and hypothesized a functional role for miR-301a in regulating HCC growth. We show that miR-301a is markedly upregulated in primary HCC tumors and HCC cell lines, while IRF-1 is down-regulated in a post-transcriptional manner. MiR-301a regulates basal and inducible IRF-1 expression in HCC cells with an inverse relationship between miR-301a and IRF-1 expression in HCC cells. Chronic hypoxia induces miR-301a in HCC in vitro and decreases IRF-1 expression. Finally, miR-301a inhibition increases apoptosis and decreases HCC cell proliferation. These findings suggest that targeting of IRF-1 by miR-301a contributes to the molecular basis for IRF-1 downregulation in HCC and provides new insight into the regulation of HCC by miRNAs.
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Affiliation(s)
- Kun Dong
- Department of Pediatric Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Qiang Du
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Xiao Cui
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Peiqi Wan
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | | | - Jing Luo
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Bing Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Yihe Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - David A Geller
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA.
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27
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Tan L, Yuan J, Zhu W, Tao K, Wang G, Gao J. Interferon regulatory factor-1 suppresses DNA damage response and reverses chemotherapy resistance by downregulating the expression of RAD51 in gastric cancer. Am J Cancer Res 2020; 10:1255-1270. [PMID: 32368400 PMCID: PMC7191096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023] Open
Abstract
Recent studies have shown that IRF-1 plays a significant role in various tumour-induced chemoresistance, but its role and mechanism in gastric cancer-associated chemoresistance are not clear. Our study showed that IRF-1 expression could reverse gastric cancer-related chemoresistance. Dysregulated DNA repair is an important cause of chemoresistance. We established a chemoresistant gastric cancer cell line and found that drug-resistant gastric cancer cells had increased DNA repair ability and that IRF-1 regulated DNA damage repair. Further studies showed that IRF-1 inhibited the expression of RAD51 directly by binding to the RAD51 promoter to affect DNA damage repair; this binding reversed resistance. However, restoring the expression of RAD51 halted the inhibitory effect of IRF-1 partially. Also, we revealed that the overexpression of IRF-1 in a mouse model synergized with chemotherapeutic drugs to inhibit tumour growth. Finally, IRF-1 expression correlated with RAD51 expression in gastric cancer specimens. The expression of IRF-1 and RAD51 are both related to the survival duration of patients with gastric cancer. These results suggest that targeting IRF-1-RAD51 could be an effective approach to reversing multidrug resistance in gastric cancer.
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Affiliation(s)
- Lulu Tan
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
| | - Jingsheng Yuan
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
| | - Wenzhong Zhu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
| | - Kaixiong Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
| | - Guobing Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
| | - Jinbo Gao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan 430022, Hubei, P. R. China
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28
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Peng K, Fan X, Li Q, Wang Y, Chen X, Xiao P, Passerini AG, Simon SI, Sun C. IRF-1 mediates the suppressive effects of mTOR inhibition on arterial endothelium. J Mol Cell Cardiol 2020; 140:30-41. [PMID: 32087218 DOI: 10.1016/j.yjmcc.2020.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 01/16/2020] [Accepted: 02/18/2020] [Indexed: 12/29/2022]
Abstract
AIMS Mammalian target of rapamycin (mTOR) inhibitors used in drug-eluting stents (DES) to control restenosis have been found to delay endothelialization and increase incidence of late-stent thrombosis through mechanisms not completely understood. We revealed that mTOR inhibition (mTORi) upregulated the expression of cell growth suppressor IRF-1 in primary human arterial endothelial cells (HAEC). This study aimed to examine how mTOR-regulated IRF-1 expression contributes to the suppressive effect of mTORi on arterial endothelial proliferation. METHODS AND RESULTS Western blotting, quantitative PCR, and a dual-luciferase reporter assay indicated that mTOR inhibitors rapamycin and torin 1 upregulated IRF-1 expression and increased its transcriptional activity. IRF-1 in turn contributed to the suppressive effect of mTORi by mediating HAEC apoptosis and cell cycle arrest in part through upregulation of caspase 1 and downregulation of cyclin D3, as revealed by CCK-8 assay, Annexin V binding assay, measurement of activated caspase 3, BrdU incorporation assay, and matrigel tube formation assay. In a mouse model of femoral artery wire injury, administration of rapamycin inhibited EC recovery, an effect alleviated by EC deficiency of IRF-1. Chromatin immunoprecipitation assay with HAEC and rescue expression of wild type or dominant-negative IRF-1 in EC isolated from Irf1-/- mice confirmed transcriptional regulation of IRF-1 on the expression of CASP1 and CCND3. Furthermore, mTORi activated multiple PKC members, among which PKCζ was responsible for the growth-inhibitory effect on HAEC. Activated PKCζ increased IRF1 transcription through JAK/STAT-1 and NF-κB signaling. Finally, overexpression of wild type or mutant raptor incapable of binding mTOR indicated that mTOR-free raptor contributed to PKCζ activation in mTOR-inhibited HAEC. CONCLUSIONS The study reveals an IRF-1-mediated mechanism that contributes to the suppressive effects of mTORi on HAEC proliferation. Further study may facilitate the development of effective strategies to reduce the side effects of DES used in coronary interventions.
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Affiliation(s)
- Kai Peng
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China
| | - Xing Fan
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China
| | - Qiannan Li
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China
| | - Yiying Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China
| | - Xiaolin Chen
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China
| | - Pingxi Xiao
- Department of Cardiology, The affiliated Sir Run Run Hospital of Nanjing Medical University, Nanjing, China
| | - Anthony G Passerini
- Department of Biomedical Engineering, University of California Davis, Davis, CA, United States of America
| | - Scott I Simon
- Department of Biomedical Engineering, University of California Davis, Davis, CA, United States of America
| | - ChongXiu Sun
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China; Key laboratory of Human Functional Genomics of Jiang Province, Nanjing, China.
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29
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Interferon regulatory factor-1 reverses chemoresistance by downregulating the expression of P-glycoprotein in gastric cancer. Cancer Lett 2019; 457:28-39. [DOI: 10.1016/j.canlet.2019.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/31/2019] [Accepted: 05/06/2019] [Indexed: 02/08/2023]
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30
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Ohsugi T, Yamaguchi K, Zhu C, Ikenoue T, Takane K, Shinozaki M, Tsurita G, Yano H, Furukawa Y. Anti-apoptotic effect by the suppression of IRF1 as a downstream of Wnt/β-catenin signaling in colorectal cancer cells. Oncogene 2019; 38:6051-6064. [PMID: 31292489 DOI: 10.1038/s41388-019-0856-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 02/27/2019] [Accepted: 04/16/2019] [Indexed: 12/29/2022]
Abstract
Impaired Wnt signaling pathway plays a crucial role in the development of colorectal cancer through activation of the β-catenin/TCF7L2 complex. Although genes upregulated by Wnt/β-catenin signaling have been intensively studied, the roles of downregulated genes are poorly understood. Previously, we reported that interferon-induced proteins with tetratricopeptide repeats 2 (IFIT2) was downregulated by the Wnt/β-catenin signaling, and that the suppressed expression of IFIT2 conferred antiapoptotic property to colorectal cancer (CRC) cells. However, the mechanisms underlying how Wnt/β-catenin signaling regulates IFIT2 remain to be elucidated. In this study, we have uncovered that the expression of IFIT2 is induced by IRF1, which is negatively regulated by the Wnt/β-catenin signaling. In addition, we found that downregulation of IRF1 is mediated by its degradation through the ubiquitination-proteasome pathway, and that decreased activity of a deubiquitinase complex containing USP1 and UAF1 is involved in the degradation of IRF1 by Wnt/β-catenin signaling. These data should provide better understanding of the Wnt signaling pathway and human carcinogenesis.
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Affiliation(s)
- Tomoyuki Ohsugi
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Kiyoshi Yamaguchi
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Chi Zhu
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Tsuneo Ikenoue
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Kiyoko Takane
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Masaru Shinozaki
- Department of Surgery, IMSUT Hospital, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Giichiro Tsurita
- Department of Surgery, IMSUT Hospital, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan
| | - Hideaki Yano
- Department of Surgery, Center Hospital of the National Center for Global Health and Medicine, Tokyo, 162-8655, Japan
| | - Yoichi Furukawa
- Division of Clinical Genome Research, Advanced Clinical Research Center, Institute of Medical Science, the University of Tokyo, Tokyo, 108-8639, Japan.
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31
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MIR17HG-miR-18a/19a axis, regulated by interferon regulatory factor-1, promotes gastric cancer metastasis via Wnt/β-catenin signalling. Cell Death Dis 2019; 10:454. [PMID: 31186404 PMCID: PMC6560107 DOI: 10.1038/s41419-019-1685-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/18/2019] [Accepted: 05/23/2019] [Indexed: 12/24/2022]
Abstract
MIR17HG, located on chromosome 13, is a class of Pri-miRNAs that generates six miRNAs: miR-17, miR-18a, miR-19a, miR-20a, miR-19b-1 and miR-92-1. These miRNAs are ubiquitously overexpressed in diverse tumour types and exhibit complex biological links to tumour metastasis. We demonstrated that MIR17HG-derived miR-18a and miR-19a coordinately mediate gastric cancer cell metastasis by directly inhibiting SMAD2 expression and upregulating Wnt/β-catenin signalling. Based on previous studies, we hypothesised that an investigation of MIR17HG inhibition would be beneficial to clinical gastric cancer treatment, and systematically coupled bioinformatics analyses brought interferon regulatory factor-1 (IRF-1) to our attention. We then established stable clones in gastric cancer cells containing a doxycycline-inducible IRF-1 expression system and found that the expression of IRF-1 downregulates the embedded miRNAs of MIR17HG in gastric cancer cells and inhibits gastric cancer cell metastasis by attenuating Wnt/β-catenin signalling. Further rescue assays confirmed the crucial roles of miR-18a and miR-19a in the IRF-1-mediated inhibition of Wnt/β-catenin signalling. We also demonstrated that IRF-1 binds to the transcriptional site in the MIR17HG promoter and inhibits MIR17HG expression. Moreover, IFN-γ induced the IRF-1-mediated downregulation of MIR17HG in gastric cancer cells. Our hypothesis was supported by the results of immunohistochemistry analyses of clinical gastric cancer samples, and we also demonstrated the role of IRF-1 in inhibiting MIR17HG expression and tumour metastasis in vivo. We conclude that IRF-1 inhibits gastric cancer metastasis by downregulating MIR17HG-miR-18a/miR-19a axis expression and attenuating Wnt/β-catenin signalling.
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32
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IRF-1 Intervention in the Classical ROS-Dependent Release of NETs during LPS-Induced Acute Lung Injury in Mice. Inflammation 2019; 42:387-403. [PMID: 30315525 DOI: 10.1007/s10753-018-0903-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Previously, we demonstrated that neutrophil extracellular traps (NETs) play an essential role in lipopolysaccharide (LPS)-induced acute lung injury. However, the underlying mechanism is unclear. In this study, we showed that knockout of interferon regulatory factor 1 (IRF-1) in mice strongly attenuated the generation of NETs and reactive oxygen species (ROS) production in neutrophils from bronchoalveolar lavage fluid and alleviated LPS-induced lung injury and systemic inflammation. Our in vitro experiments demonstrated that LPS-stimulated platelets induce NET release through two distinct processes: an ROS-independent early/rapid NETosis and a later ROS-dependent classical NETosis. Notably, the classical ROS-dependent pathway plays a dominant role in the generation of NETs. Furthermore, we showed that IRF-1 knockout does not affect the formation of NETs in early/rapid NETosis, but significantly attenuates ROS production and the generation of NETs in classical NETosis, which determines the total levels of NETs released by LPS-stimulated platelets. In conclusion, IRF-1 deficiency plays a key role in moderating the excessive NETs formed via ROS in the classical pathway and retaining the protective role of the low-NET levels generated in early/rapid NETosis, which may serve as a novel target in acute lung injury/acute respiratory distress syndrome.
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33
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Fries GR, Khan S, Stamatovich S, Dyukova E, Walss-Bass C, Lane SD, Schmitz JM, Wardle MC. Anhedonia in cocaine use disorder is associated with inflammatory gene expression. PLoS One 2018; 13:e0207231. [PMID: 30408130 PMCID: PMC6224118 DOI: 10.1371/journal.pone.0207231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 10/27/2018] [Indexed: 12/22/2022] Open
Abstract
Treatments for Cocaine Use Disorder (CUD) are variably effective, and there are no FDA-approved medications. One approach to developing new treatments for CUD may be to investigate and target poor prognostic signs. One such sign is anhedonia (i.e. a loss of pleasure or interest in non-drug rewards), which predicts worse outcomes in existing CUD treatments. Inflammation is thought to underlie anhedonia in many other disorders, but the relationship between anhedonia and inflammation has not been investigated in CUD. Therefore, we assessed peripheral genome-wide gene expression in n = 48 individuals with CUD with high (n = 24) vs. low (n = 24) levels of anhedonia, defined by a median split of self-reported anhedonia. Our hypothesis was that individuals with high anhedonia would show differential gene expression in inflammatory pathways. No individual genes were significantly different between the low and high anhedonia groups when using t-tests with a stringent false discovery rate correction (FDR-corrected p < 0.05). However, an exploratory analysis identified 166 loci where t-tests suggested group differences at a nominal p < 0.05. We used DAVID, a bioinformatics tool that provides functional interpretations of complex lists of genes, to examine representation of this gene list in known pathways. It confirmed that mechanisms related to immunity were the top significant associations with anhedonia in the sample. Further, the two top differentially expressed genes in our sample, IRF1 and GBP5, both have primary inflammation and immune functions, and were significantly negatively correlated with total scores on our self-report of anhedonia across all 48 subjects. These results suggest that prioritizing development of anti-inflammatory medications for CUD may pay dividends, particularly in combination with treatment-matching strategies using either phenotypic measures of anhedonia or biomarkers of inflammatory gene expression to individualize treatment.
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Affiliation(s)
- Gabriel Rodrigo Fries
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Sarwar Khan
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Sydney Stamatovich
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Elena Dyukova
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Consuelo Walss-Bass
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Scott D. Lane
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Joy M. Schmitz
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
| | - Margaret C. Wardle
- Department of Psychiatry and Behavioral Science, University of Texas Health Science Center at Houston, Houston, TX, United States of America
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Jeong SI, Kim JW, Ko KP, Ryu BK, Lee MG, Kim HJ, Chi SG. XAF1 forms a positive feedback loop with IRF-1 to drive apoptotic stress response and suppress tumorigenesis. Cell Death Dis 2018; 9:806. [PMID: 30042418 PMCID: PMC6057933 DOI: 10.1038/s41419-018-0867-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/18/2018] [Accepted: 07/11/2018] [Indexed: 12/30/2022]
Abstract
X-linked inhibitor of apoptosis (XIAP)-associated factor 1 (XAF1) is a proapoptotic tumor suppressor that is frequently inactivated in multiple human cancers. However, the molecular basis for the XAF1-mediated growth inhibition remains largely undefined. Here, we report that XAF1 forms a positive feedback loop with interferon regulatory factor-1 (IRF-1) and functions as a transcriptional coactivator of IRF-1 to suppress tumorigenesis. Under various stressful conditions, XAF1 transcription is activated by IRF-1, and elevated XAF1 stabilizes and activates IRF-1. Mechanistically, XAF1 binds to the multifunctional domain 2 of IRF-1 via the zinc finger domain 6, thereby hindering C-terminus of Hsc70-interacting protein (CHIP) interaction with and ubiquitination of IRF-1. Activation of the IRF-1−XAF1 loop greatly increases stress-induced apoptosis and decreases the invasive capability of tumor cells. Oncogenic Ras and growth factors interfere with the IRF-1−XAF1 interplay via Erk-mediated repression of XAF1 transcription. Furthermore, XAF1 enhances IRF-1-mediated transcription of proapoptotic genes via the XAF1-IRF-1 complex formation on these target promoters. Meanwhile, XAF1 inhibits NF-κB-mediated tumor cell malignancy by reinforcing IRF-1 binding to a subset of coregulated promoters. Expression levels of IRF-1 and XAF1 correlate tightly in both cancer cell lines and primary tumors, and XAF1-induced tumor regression is markedly attenuated in IRF-1-depleted tumors. Collectively, this study identifies a novel mechanism of XAF1-mediated tumor suppression, uncovering XAF1 as a feedback coactivator of IRF-1 under stressful conditions.
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Affiliation(s)
- Seong-In Jeong
- Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Jung-Wook Kim
- Department of Internal Medicine, Kyung Hee University Hospital, Seoul, 02447, Korea
| | - Kyung-Phil Ko
- Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Byung-Kyu Ryu
- Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Min-Goo Lee
- Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Hyo-Jong Kim
- Department of Internal Medicine, Kyung Hee University Hospital, Seoul, 02447, Korea
| | - Sung-Gil Chi
- Department of Life Sciences, Korea University, Seoul, 02841, Korea.
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35
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Interferon regulatory factor 1 inactivation in human cancer. Biosci Rep 2018; 38:BSR20171672. [PMID: 29599126 PMCID: PMC5938431 DOI: 10.1042/bsr20171672] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/18/2018] [Accepted: 03/28/2018] [Indexed: 11/28/2022] Open
Abstract
Interferon regulatory factors (IRFs) are a group of closely related proteins collectively referred to as the IRF family. Members of this family were originally recognized for their roles in inflammatory responses; however, recent research has suggested that they are also involved in tumor biology. This review focusses on current knowledge of the roles of IRF-1 and IRF-2 in human cancer, with particular attention paid to the impact of IRF-1 inactivation. The different mechanisms underlying IRF-1 inactivation and their implications for human cancers and the potential importance of IRF-1 in immunotherapy are also summarized.
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36
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Zhang HM, Li SP, Yu Y, Wang Z, He JD, Xu YJ, Zhang RX, Zhang JJ, Zhu ZJ, Shen ZY. Bi-directional roles of IRF-1 on autophagy diminish its prognostic value as compared with Ki67 in liver transplantation for hepatocellular carcinoma. Oncotarget 2018; 7:37979-37992. [PMID: 27191889 PMCID: PMC5122365 DOI: 10.18632/oncotarget.9365] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 04/27/2016] [Indexed: 12/14/2022] Open
Abstract
The prognostic values of IRF-1 and Ki-67 for liver transplantation (LT) of hepatocellular carcinoma (HCC) were investigated, as well as the mechanisms of IRF-1 in tumor suppression. Adult orthotropic liver transplantation cases (N = 127) were involved in the analysis. A significant decreased recurrence free survival (RFS) was found in the Ki-67 positive groups. Ki-67, tumor microemboli, the Milan and UCSF criteria were found to be independent risk factors for RFS. In LT for HCC beyond the Milan criteria, a significant decrease in RFS was found in the IRF-1 negative groups. In SK-Hep1 cells, an increase in apoptosis and decrease in autophagy were observed after IFN-γ stimulation, which was accompanied with increasing IRF-1 levels. When IRF-1 siRNA or a caspase inhibitor were used, reductions in LC3-II were diminished or disappeared after IFN-γ stimulation, suggesting that IFN-γ inhibited autophagy via IRF-1 expression and caspase activation. However, after IRF-1 siRNA was introduced, a reduction in LC3-II was found. Thus basic expression of IRF-1 was also necessary for autophagy. IRF-1 may be used as a potential target for HCC treatment based on its capacity to affect apoptosis and autophagy. Ki-67 shows great promise for the prediction of HCC recurrence in LT and can be used as an aid in the selection of LT candidates.
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Affiliation(s)
- Hai-Ming Zhang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Shi-Peng Li
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Yao Yu
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Zhen Wang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Jin-Dan He
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Yan-Jie Xu
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Rong-Xin Zhang
- Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Jian-Jun Zhang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China
| | - Zhi-Jun Zhu
- Beijing Friendship Hospital, China Capital Medical University, Beijing, P. R. China
| | - Zhong-Yang Shen
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
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37
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Mahmoudi MB, Abed Khojasteh M, Alsahebfosoul F, Gharibdoost F, Mostafaei S, Ganjalikhani-Hakemi M, Mahmoudi M. Expressions of p53 and PUMA in fibroblasts of systemic sclerosis patients are normal at transcription level. J Cosmet Dermatol 2017; 17:549-554. [PMID: 28905491 DOI: 10.1111/jocd.12420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2017] [Indexed: 02/05/2023]
Abstract
BACKGROUND Systemic sclerosis (SSc) fibroblasts show resistance apoptosis mechanisms, which enhances the fibrosis stage of the disease. Impaired function of p53 upregulated modulator of apoptosis (PUMA) has been related to deficits in p53-dependant apoptosis pathway. This study aimed to evaluate the transcriptional levels of p53 and PUMA mRNAs in fibroblasts from SSc patients and compare it with healthy individuals. METHODS In this case-control study, skin biopsy samples were obtained from 19 patients with diffuse cutaneous SSc (DcSSc) and 16 healthy controls. Afterward, dermal fibroblasts were isolated and cultured. After extraction of total RNA from cultured fibroblasts, complementary DNA (cDNA) was synthesized. mRNA quantification was carried out using real-time PCR, SYBR Green PCR master mix, and specific primers for p53 and PUMA. RESULTS No significant alteration was observed in mRNA expression levels of p53 and PUMA (P = .99 and .23, respectively) in fibroblasts from SSc patients compared with controls. CONCLUSIONS Apoptosis pathways are impaired in fibroblasts from patients with SSc, leading to chronic fibrosis. Nonetheless, PUMA/p53 pathway may not be involved in dysfunction of apoptosis mechanisms in fibroblasts of patients with SSc.
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Affiliation(s)
| | - Majid Abed Khojasteh
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fereshteh Alsahebfosoul
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Farhad Gharibdoost
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shayan Mostafaei
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mahdi Mahmoudi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
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38
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Deng SY, Zhang LM, Ai YH, Pan PH, Zhao SP, Su XL, Wu DD, Tan HY, Zhang LN, Tsung A. Role of interferon regulatory factor-1 in lipopolysaccharide-induced mitochondrial damage and oxidative stress responses in macrophages. Int J Mol Med 2017; 40:1261-1269. [PMID: 28849179 PMCID: PMC5593470 DOI: 10.3892/ijmm.2017.3110] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/04/2017] [Indexed: 01/20/2023] Open
Abstract
Sepsis causes many early deaths; both macrophage mitochondrial damage and oxidative stress responses are key factors in its pathogenesis. Although the exact mechanisms responsible for sepsis-induced mitochondrial damage are unknown, the nuclear transcription factor, interferon regulatory factor-1 (IRF-1) has been reported to cause mitochondrial damage in several diseases. Previously, we reported that in addition to promoting systemic inflammation, IRF-1 promoted the apoptosis of and inhibited autophagy in macrophages. In the present study, we hypothesized that lipopolysaccharide (LPS)-induced IRF-1 activation in macrophages may promote mitochondrial damage and oxidative stress. In vitro, LPS was found to promote IRF-1 activation, reactive oxygen species (ROS) production, adenosine triphosphate (ATP) depletion, superoxide dismutase (SOD) consumption, malondialdehyde (MDA) accumulation and mitochondrial depolarization in macrophages in a time- and dose-dependent manner. These effects were abrogated in cells in which IRF-1 was knocked down. Furthermore, IRF-1 overexpression increased LPS-induced oxidative stress responses and mitochondrial damage. In vivo, peritoneal macrophages obtained from IRF-1 knockout (KO) mice produced less ROS and had less mitochondrial depolarization and damage following the administration of LPS, when compared to their wild-type (WT) counterparts. In addition, IRF-1 KO mice exhibited a decreased release of mitochondrial DNA (mtDNA) following the administration of LPS. Thus, IRF-1 may be a critical factor in augmenting LPS-induced oxidative stress and mitochondrial damage in macrophages.
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Affiliation(s)
- Song-Yun Deng
- Department of Intensive Care Unit, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Le-Meng Zhang
- Department of Intensive Care Unit, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Yu-Hang Ai
- Department of Intensive Care Unit, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Pin-Hua Pan
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Shuang-Ping Zhao
- Department of Intensive Care Unit, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Xiao-Li Su
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Dong-Dong Wu
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Hong-Yi Tan
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Li-Na Zhang
- Department of Intensive Care Unit, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Allan Tsung
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
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Shi WJ, Gao JB. Molecular mechanisms of chemoresistance in gastric cancer. World J Gastrointest Oncol 2016; 8:673-681. [PMID: 27672425 PMCID: PMC5027022 DOI: 10.4251/wjgo.v8.i9.673] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 06/07/2016] [Accepted: 06/29/2016] [Indexed: 02/05/2023] Open
Abstract
Gastric cancer is the fourth most common cancer and the second leading cause of cancer deaths worldwide. Chemotherapy is one of the major treatments for gastric cancer, but drug resistance limits the effectiveness of chemotherapy, which results in treatment failure. Resistance to chemotherapy can be present intrinsically before the administration of chemotherapy or it can develop during chemotherapy. The mechanisms of chemotherapy resistance in gastric cancer are complex and multifactorial. A variety of factors have been demonstrated to be involved in chemoresistance, including the reduced intracellular concentrations of drugs, alterations in drug targets, the dysregulation of cell survival and death signaling pathways, and interactions between cancer cells and the tumor microenvironment. This review focuses on the molecular mechanisms of chemoresistance in gastric cancer and on recent studies that have sought to overcome the underlying mechanisms of chemoresistance.
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40
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Yan Y, Liang Z, Du Q, Yang M, Geller DA. MicroRNA-23a downregulates the expression of interferon regulatory factor-1 in hepatocellular carcinoma cells. Oncol Rep 2016; 36:633-40. [PMID: 27279136 PMCID: PMC4933546 DOI: 10.3892/or.2016.4864] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 01/05/2016] [Indexed: 12/15/2022] Open
Abstract
Interferon regulatory factor-1 (IRF-1) is a tumor-suppressor gene induced by interferon-γ (IFNγ) and plays an important role in the cell death of hepatocellular carcinoma (HCC). HCC tumors evade death in part by downregulating IRF-1 expression, yet the molecular mechanisms accounting for IRF-1 suppression in HCC have not yet been characterized. Previous studies have shown that microRNA-23a (miR-23a) can suppress apoptosis by targeting IRF-1. Therefore, we hypothesized that miR-23a promotes HCC growth by downregulating IRF-1. For the in vivo studies, 7 cases of resected HCC and adjacent liver samples were analyzed. For the in vitro studies, IRF-1 mRNA and protein were examined in HepG2 and Huh-7 HCC cells after IFNγ stimulation by real-time PCR and western blotting, respectively. To determine the role of miR-23a in regulating IRF-1, HepG2 cells were transfected with an miR-23a mimic or inhibitor, and IRF-1 expression was examined. Binding of miR-23a was assessed by cloning the 528-bp human IRF-1 3'-untranslated region (3'UTR) into luciferase reporter plasmid pMIR-IRF-1-3'UTR. The results showed that IRF-1 mRNA expression was downregulated in the human HCC tumor tissues compared to that in the adjacent background liver tissues. IFNγ-induced IRF-1 protein was less in the HepG2 tumor cells compared to that in the primary human hepatocytes. miR-23a expression was inversely correlated with IRF-1, and addition of the miR-23a inhibitor increased basal IRF-1 mRNA and protein. Likewise, the miR-23a mimic downregulated IFNγ-induced IRF-1 protein expression, while the miR-23a inhibitor increased IRF-1. Furthermore, the miR-23a mimic repressed IRF-1-3'UTR reporter activity, while the miR-23a inhibitor increased the reporter activity. These results demonstrated that IRF-1 expression is downregulated in human HCC tumors compared to that noted in the background liver. miR-23a downregulates the expression of IRF-1 in HCC cells, and the IRF-1 3'UTR has an miR‑23a binding site that binds miR-23a and decreases reporter activity. These findings suggest that the targeting of IRF-1 by miR-23a may be the molecular basis for IRF-1 downregulation in HCC and provide new insight into the regulation of HCC by miRNAs.
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Affiliation(s)
- Yihe Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Division of General Surgery
| | - Zhihai Liang
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Qiang Du
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Muqing Yang
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - David A. Geller
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
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Karpus ON, Hsiao CC, de Kort H, Tak PP, Hamann J. Intracellular delivery of poly(I:C) induces apoptosis of fibroblast-like synoviocytes via an unknown dsRNA sensor. Biochem Biophys Res Commun 2016; 477:343-9. [PMID: 27343555 DOI: 10.1016/j.bbrc.2016.06.104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 06/21/2016] [Indexed: 11/25/2022]
Abstract
Fibroblast-like synoviocytes (FLS) express functional membranous and cytoplasmic sensors for double-stranded (ds)RNA. Notably, FLS undergo apoptosis upon transfection with the synthetic dsRNA analog poly(I:C). We here studied the mechanism of intracellular poly(I:C) recognition and subsequent cell death in FLS. FLS responded similarly to poly(I:C) or 3pRNA transfection; however, only intracellular delivery of poly(I:C) induced significant cell death, accompanied by upregulation of pro-apoptotic proteins Puma and Noxa, caspase 3 cleavage, and nuclear segregation. Knockdown of the DExD/H-box helicase MDA5 did not affect the response to intracellular poly(I:C); in contrast, knockdown of RIG-I abrogated the response to 3pRNA. Knockdown of the downstream adaptor proteins IPS, STING, and TRIF or inhibition of TBK1 did not affect the response to intracellular poly(I:C), while knockdown of IFNAR blocked intracellular poly(I:C)-mediated signaling and cell death. We conclude that a so far unknown intracellular sensor recognizes linear dsRNA and induces apoptosis in FLS.
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Affiliation(s)
- Olga N Karpus
- Departments of Experimental Immunology and Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Cheng-Chih Hsiao
- Departments of Experimental Immunology and Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Hanneke de Kort
- Departments of Experimental Immunology and Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Paul P Tak
- Departments of Experimental Immunology and Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Jörg Hamann
- Departments of Experimental Immunology and Internal Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.
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Panfil AR, Dissinger NJ, Howard CM, Murphy BM, Landes K, Fernandez SA, Green PL. Functional Comparison of HBZ and the Related APH-2 Protein Provides Insight into Human T-Cell Leukemia Virus Type 1 Pathogenesis. J Virol 2016; 90:3760-72. [PMID: 26819304 PMCID: PMC4794683 DOI: 10.1128/jvi.03113-15] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/18/2016] [Indexed: 02/06/2023] Open
Abstract
UNLABELLED Human T-cell leukemia virus type 1 (HTLV-1) and type 2 (HTLV-2) are highly related retroviruses that transform T cells in vitro but have distinct pathological outcomes in vivo. HTLV-1 encodes a protein from the antisense strand of its proviral genome, the HTLV-1 basic leucine zipper factor (HBZ), which inhibits Tax-1-mediated viral transcription and promotes cell proliferation, a high proviral load, and persistence in vivo. In adult T-cell leukemia/lymphoma (ATL) cell lines and patient T cells, hbz is often the only viral gene expressed. The antisense strand of the HTLV-2 proviral genome also encodes a protein termed APH-2. Like HBZ, APH-2 is able to inhibit Tax-2-mediated viral transcription and is detectable in most primary lymphocytes from HTLV-2-infected patients. However, unlike HBZ, the loss of APH-2 in vivo results in increased viral replication and proviral loads, suggesting that HBZ and APH-2 modulate the virus and cellular pathways differently. Herein, we examined the effect of APH-2 on several known HBZ-modulated pathways: NF-κB (p65) transactivation, transforming growth factor β (TGF-β) signaling, and interferon regulatory factor 1 (IRF-1) transactivation. Like HBZ, APH-2 has the ability to inhibit p65 transactivation. Conversely, HBZ and APH-2 have divergent effects on TGF-β signaling and IRF-1 transactivation. Quantitative PCR and protein half-life experiments revealed a substantial disparity between HBZ and APH-2 transcript levels and protein stability, respectively. Taken together, our data further elucidate the functional differences between HBZ and APH-2 and how these differences can have profound effects on the survival of infected cells and, ultimately, pathogenesis. IMPORTANCE Human T-cell leukemia virus type 1 (HTLV-1) and type 2 (HTLV-2) are highly related retroviruses that have distinct pathological outcomes in infected hosts. Functional comparisons of HTLV-1 and HTLV-2 proteins provide a better understanding about how HTLV-1 infection is associated with disease and HTLV-2 infection is not. The HTLV genome antisense-strand genes hbz and aph-2 are often the only viral genes expressed in HTLV-infected T cells. Previously, our group found that HTLV-1 HBZ and HTLV-2 APH-2 had distinct effects in vivo and hypothesized that the differences in the interactions of HBZ and APH-2 with important cell signaling pathways dictate whether cells undergo proliferation, apoptosis, or senescence. Ultimately, these functional differences may affect how HTLV-1 causes disease but HTLV-2 generally does not. In the current study, we compared the effects of HBZ and APH-2 on several HTLV-relevant cellular pathways, including the TGF-β signaling, NF-κB activation, and IRF-1 transactivation pathways.
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Affiliation(s)
- Amanda R Panfil
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA
| | - Nathan J Dissinger
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA
| | - Cory M Howard
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA
| | - Brandon M Murphy
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA
| | - Kristina Landes
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA
| | - Soledad A Fernandez
- Center for Biostatistics, The Ohio State University, Columbus, Ohio, USA Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio, USA
| | - Patrick L Green
- Center for Retrovirus Research, The Ohio State University, Columbus, Ohio, USA Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, USA Comprehensive Cancer Center and Solove Research Institute, The Ohio State University, Columbus, Ohio, USA Department of Molecular Virology, Immunology, and Medical Genetics, The Ohio State University, Columbus, Ohio, USA
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43
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Chen CL, Chiang TH, Tseng PC, Wang YC, Lin CF. Loss of PTEN causes SHP2 activation, making lung cancer cells unresponsive to IFN-γ. Biochem Biophys Res Commun 2015; 466:578-84. [DOI: 10.1016/j.bbrc.2015.09.085] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 09/15/2015] [Indexed: 02/07/2023]
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44
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Smac mimetic-induced upregulation of interferon-β sensitizes glioblastoma to temozolomide-induced cell death. Cell Death Dis 2015; 6:e1888. [PMID: 26379193 PMCID: PMC4650438 DOI: 10.1038/cddis.2015.235] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/09/2015] [Accepted: 07/20/2015] [Indexed: 12/13/2022]
Abstract
Inhibitor of apoptosis (IAP) proteins are frequently expressed at high levels in cancer cells and represent attractive therapeutic targets. We previously reported that the Smac (second mitochondria-derived activator of caspases) mimetic BV6, which antagonizes IAP proteins, sensitizes glioblastoma cells to temozolomide (TMZ)-induced cell death in a nuclear factor-κB (NF-κB)-dependent manner. However, BV6-induced NF-κB target genes responsible for this synergistic interaction have remained elusive. Using whole-genome gene expression profiling, we here identify BV6-stimulated, NF-κB-dependent transcriptional upregulation of interferon-β (IFNβ) and IFN-mediated proapoptotic signaling as critical events that mediate BV6/TMZ-induced apoptosis. Knockdown of IFNβ significantly rescues cells from BV6/TMZ-induced cell death. Similarly, silencing of the corresponding receptor IFNα/β receptor (IFNAR) confers a significant protection against apoptosis, demonstrating that IFNβ and IFN signaling are required for BV6/TMZ-mediated cell death. Moreover, BV6 and TMZ cooperate to transcriptionally upregulate the proapoptotic B-cell lymphoma 2 family proteins Bax (Bcl-2-associated X protein) or Puma (p53-upregulated modulator of apoptosis). Knockdown of Bax or Puma significantly decreases BV6/TMZ-induced apoptosis, showing that both proteins are necessary for apoptosis. By identifying IFNβ as a key mediator of BV6/TMZ-induced apoptosis, our study provides novel insights into the underlying molecular mechanisms of Smac mimetic-mediated chemosensitization with important implications for the development of novel treatment strategies for glioblastoma.
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Zhao J, Chen C, Xiao JR, Wei HF, Zhou XH, Mao XX, Zhang WD, Qian R, Chen XL, He MQ, Yu XW, Zhao J. An Up-regulation of IRF-1 After a Spinal Cord Injury: Implications for Neuronal Apoptosis. J Mol Neurosci 2015; 57:595-604. [PMID: 26342280 PMCID: PMC4751177 DOI: 10.1007/s12031-015-0642-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 08/14/2015] [Indexed: 11/10/2022]
Abstract
IRF-1, a kind of transcription factor, is expressed in many cell types, except in early embryonal cells. IRF-1 has played an essential role in various physiological and pathological processes, including tumor immune surveillance, viral infection, development of immunity system and pro-inflammatory injury. However, the expression and function of IRF-1 in spinal cord injury (SCI) are still unknown. In this study, we have performed an acute SCI model in adult rats and investigated the dynamic changes of IRF-1 expression in the spinal cord. Western blot have shown that IRF-1 protein levels gradually increased, reaching a peak at day 3 and then gradually declined to a normal level at day 14 after SCI. Double immunofluorescence staining showed that IRF-1 immunoreactivity was found in neurons, but not in astrocytes and microglia. Additionally, colocalization of IRF-1/active caspase-3 was detected in neurons. In vitro, IRF-1 depletion, by short interfering RNA, obviously decreases neuronal apoptosis. In conclusion, this is the first description of IRF-1 expression in spinal cord injury. Our results suggested that IRF-1 might play crucial roles in CNS pathophysiology after SCI.
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Affiliation(s)
- Jian Zhao
- Department of Orthopedics, Shanghai Changzheng Hospital, Shanghai, 200000, China
| | - Chen Chen
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Jian-Ru Xiao
- Department of Orthopedics, Shanghai Changzheng Hospital, Shanghai, 200000, China
| | - Hai-Feng Wei
- Department of Orthopedics, Shanghai Changzheng Hospital, Shanghai, 200000, China
| | - Xu-hui Zhou
- Department of Orthopedics, Shanghai Changzheng Hospital, Shanghai, 200000, China
| | - Xing-Xing Mao
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Wei-dong Zhang
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Rong Qian
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Xin-lei Chen
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Ming-qing He
- Department of Geriatrics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226001, China
| | - Xiao-Wei Yu
- Department of Neurology, Affiliated Hospital of Nantong University Nantong Second People's Hospital, Nantong, Jiangsu Province, 226001, China. .,Department of Neurology, Affiliated Hospital of Nantong University Nantong Second People's Hospital, Nantong, Jiangsu Province, 226001, China.
| | - Jian Zhao
- Department of Orthopedics, Shanghai Changzheng Hospital, Shanghai, 200000, China.
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46
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Wan X, Ding X, Chen S, Song H, Jiang H, Fang Y, Li P, Guo J. The functional sites of miRNAs and lncRNAs in gastric carcinogenesis. Tumour Biol 2015; 36:521-32. [PMID: 25636450 PMCID: PMC4342515 DOI: 10.1007/s13277-015-3136-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/19/2015] [Indexed: 12/12/2022] Open
Abstract
Gastric cancer is one of the most common malignant diseases and has one of the highest mortality rates worldwide. Its molecular mechanisms are poorly understood. Recently, the functions of non-coding RNAs (ncRNAs) in gastric cancer have attracted wide attention. Although the expression levels of various ncRNAs are different, they may work together in a network and contribute to gastric carcinogenesis by altering the expression of oncogenes or tumor suppressor genes. They affect the cell cycle, apoptosis, motility, invasion, and metastasis. Dysregulated microRNAs (miRNAs) and long non-coding RNAs (lncRNAs), including miR-21, miR-106, H19, and ANRIL, directly or indirectly regulate carcinogenic factors or signaling pathways such as PTEN, CDK, caspase, E-cadherin, Akt, and P53. Greater recognition of the roles of miRNAs and lncRNAs in gastric carcinogenesis can provide new insight into the mechanisms of tumor development and identify targets for anticancer drug development.
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Affiliation(s)
- Xiangxiang Wan
- Department of Gastroenterology, Ningbo First Hospital, No. 59 Liuting Street, Ningbo, 315010, China
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Wang Y, Han E, Xing Q, Yan J, Arrington A, Wang C, Tully D, Kowolik CM, Lu DM, Frankel PH, Zhai J, Wen W, Horne D, Yip MLR, Yim JH. Baicalein upregulates DDIT4 expression which mediates mTOR inhibition and growth inhibition in cancer cells. Cancer Lett 2014; 358:170-179. [PMID: 25543165 DOI: 10.1016/j.canlet.2014.12.033] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/12/2014] [Accepted: 12/14/2014] [Indexed: 11/28/2022]
Abstract
Baicalein is a natural flavone that exhibits anticancer properties. Using microarrays we found that DDIT4 was the highest transcript induced by baicalein in cancer cells. We confirmed in multiple cancer cell lines large, dose-related expression of DDIT4 by quantitative RT-PCR and immunoblot, which correlates with growth inhibition. Time course experiments demonstrate that DDIT4 is rapidly inducible, with high expression maintained for several days in vitro. Induction of DDIT4 expression is p53 independent based on evaluation of p53 knockout cells. Since DDIT4 is known to inhibit mTORC1 activity we confirmed that baicalein suppresses phosphorylation of mTORC1 targets. Using RNA interference we demonstrate that mTORC1 activity and growth inhibition by baicalein is attenuated by knockdown of DDIT4. We furthermore demonstrate suppression of established tumors by baicalein in a mouse model of breast cancer with increased DDIT4 expression in the tumors. Finally, we demonstrate that baicalein upregulates DDIT4 and causes mTORC1 and growth inhibition in platinum resistant cancer cells in marked contrast to platinum chemotherapy treatment. These studies demonstrate that baicalein inhibits mTORC1 through DDIT4 expression, and may be useful in cancer chemotherapy and chemoprevention.
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Affiliation(s)
- Yujun Wang
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Ernest Han
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Quanhua Xing
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Jin Yan
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Amanda Arrington
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Charles Wang
- Molecular & Cellular Biology, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Dylan Tully
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Claudia M Kowolik
- Molecular & Cellular Biology, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA; Medical Oncology, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - David M Lu
- Molecular Medicine, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Paul H Frankel
- Biostatistics, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Jing Zhai
- Pathology, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - Wei Wen
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - David Horne
- Molecular Medicine, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - M L Richard Yip
- Molecular Medicine, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA
| | - John H Yim
- Departments of Surgery, Beckman Research Institute of City of Hope, 1500 E. Duarte Rd, Duarte, CA 91010, USA.
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Identification of IRF1 as critical dual regulator of Smac mimetic-induced apoptosis and inflammatory cytokine response. Cell Death Dis 2014; 5:e1562. [PMID: 25501823 PMCID: PMC4454156 DOI: 10.1038/cddis.2014.498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 10/13/2014] [Accepted: 10/20/2014] [Indexed: 12/02/2022]
Abstract
Smac (second mitochondria-derived activator of caspase) mimetics are considered as promising anticancer therapeutics and used to induce apoptosis by antagonizing inhibitor of apoptosis proteins, which are often abundantly expressed in cancer cells. Here, we identify interferon regulatory factor 1 (IRF1) as a novel critical regulator of Smac mimetic BV6-induced apoptosis and proinflammatory cytokine secretion with impact on the immune response. IRF1 knockdown rescues cells from BV6-induced apoptosis and attenuates BV6-stimulated upregulation of tumor necrosis factor-α (TNFα), indicating that IRF1 mediates BV6-triggered cell death, at least in part, by inducing TNFα. This notion is supported by data showing that exogenous supply of TNFα restores BV6-induced cell death in IRF-knockdown cells. Interestingly, IRF1 selectively controls the induction of nuclear factor-κB (NF-κB) target genes, as IRF1 depletion attenuates BV6-stimulated upregulation of TNFα and interleukin-8 (IL-8) but not p100 and RelB. Concomitant knockdown of IRF1 and p65 cooperate to inhibit BV6-induced cell death, implying a cooperative interaction of IRF1 and NF-κB. In addition, IRF1 silencing hampers TNFα induction by TNFα itself as an another prototypical NF-κB stimulus. Importantly, IRF1 depletion impedes BV6-stimulated secretion of additional proinflammatory cytokines such as granulocyte–macrophage colony-stimulating factor (GM-CSF), IL-8, IL-6 and monocyte chemoattractant protein-1, and migration of primary monocytes to BV6-treated tumor cells. In conclusion, this identification of IRF1 as a dual regulator of BV6-induced apoptosis and inflammatory cytokine secretion provides novel insights into determinants of sensitivity towards Smac mimetic and possible implications of Smac mimetic treatment on tumor microenvironment and immune response.
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AbuSara N, Razavi S, Derwish L, Komatsu Y, Licursi M, Hirasawa K. Restoration of IRF1-dependent anticancer effects by MEK inhibition in human cancer cells. Cancer Lett 2014; 357:575-81. [PMID: 25497010 DOI: 10.1016/j.canlet.2014.12.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/02/2014] [Accepted: 12/05/2014] [Indexed: 02/09/2023]
Abstract
Interferon regulatory factor (IRF1) is a potent antiviral, antitumor and immune regulatory protein. Recently, we found that activated Ras/MEK inhibits antiviral response by downregulating IRF1 expression and renders cancer cells susceptible to oncolytic viruses. In this study, we sought to determine whether IRF1 downregulation underlies oncogenesis induced by Ras/MEK activation in human cancer cells. Treatment of the MEK inhibitor U0126 promoted IRF1 expression in 7 of 11 cancer cell lines we tested. IRF1 promotion was also observed in human cancer cell lines treated with different MEK inhibitors or with RNAi oligonucleotides against extracellular signal-regulated kinases (ERKs). Restoration of the expression of antitumor genes, p27 and p53 upregulated modulator of apoptosis (PUMA), by MEK inhibition was less in IRF1 shRNA knockdown cancer cells than in vector control cancer cells, suggesting that Ras/MEK targets IRF1 for the downregulation of the antitumor genes. Moreover, apoptosis induction by U0126 was significantly reduced in IRF1 shRNA knockdown cells than vector control cells. This study demonstrates that IRF1 expression is suppressed by activated Ras/MEK in human cancer cells and that IRF1 plays essential roles in apoptosis induced by Ras/MEK inhibition.
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Affiliation(s)
- Nader AbuSara
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Seyd Razavi
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Leena Derwish
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Yumiko Komatsu
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Maria Licursi
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Kensuke Hirasawa
- Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.
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50
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The regulation role of interferon regulatory factor-1 gene and clinical relevance. Hum Immunol 2014; 75:1110-4. [DOI: 10.1016/j.humimm.2014.09.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 09/27/2014] [Accepted: 09/27/2014] [Indexed: 11/20/2022]
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