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Guan G, Zhang T, Ning J, Tao C, Gao N, Zeng Z, Guo H, Chen CC, Yang J, Zhang J, Gu W, Yang E, Liu R, Guo X, Ren S, Wang L, Wei G, Zheng S, Gao Z, Chen X, Lu F, Chen X. Higher TP53BP2 expression is associated with HBsAg loss in peginterferon-α-treated patients with chronic hepatitis B. J Hepatol 2024; 80:41-52. [PMID: 37858684 DOI: 10.1016/j.jhep.2023.09.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 08/15/2023] [Accepted: 09/26/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND & AIMS HBsAg loss is only observed in a small proportion of patients with chronic hepatitis B (CHB) who undergo interferon treatment. Investigating the host factors crucial for functional cure of CHB can aid in identifying individuals who would benefit from peginterferon-α (Peg-IFNα) therapy. METHODS We conducted a genome-wide association study (GWAS) by enrolling 48 patients with CHB who achieved HBsAg loss after Peg-IFNα treatment and 47 patients who didn't. In the validation stage, we included 224 patients, of whom 90 had achieved HBsAg loss, to validate the identified significant single nucleotide polymorphisms. To verify the functional involvement of the candidate genes identified, we performed a series of in vitro and in vivo experiments. RESULTS GWAS results indicated a significant association between the rs7519753 C allele and serum HBsAg loss in patients with CHB after Peg-IFNα treatment (p = 4.85 × 10-8, odds ratio = 14.47). This association was also observed in two independent validation cohorts. Expression quantitative trait locus analysis revealed higher hepatic TP53BP2 expression in individuals carrying the rs7519753 C allele (p = 2.90 × 10-6). RNA-sequencing of liver biopsies from patients with CHB after Peg-IFNα treatment revealed that hepatic TP53BP2 levels were significantly higher in the HBsAg loss group compared to the HBsAg persistence group (p = 0.035). In vitro and in vivo experiments demonstrated that loss of TP53BP2 decreased interferon-stimulated gene levels and the anti-HBV effect of IFN-α. Mechanistically, TP53BP2 was found to downregulate SOCS2, thereby facilitating JAK/STAT signaling. CONCLUSION The rs7519753 C allele is associated with elevated hepatic TP53BP2 expression and an increased probability of serum HBsAg loss post-Peg-IFNα treatment in patients with CHB. TP53BP2 enhances the response of the hepatocyte to IFN-α by suppressing SOCS2 expression. IMPACT AND IMPLICATIONS Chronic hepatitis B (CHB) remains a global public health issue. Although current antiviral therapies are more effective in halting disease progression, only a few patients achieve functional cure for hepatitis B with HBsAg loss, highlighting the urgent need for a cure for CHB. This study revealed that the rs7519753 C allele, which is associated with high expression of hepatic TP53BP2, significantly increases the likelihood of serum HBsAg loss in patients with CHB undergoing Peg-IFNα treatment. This finding not only provides a promising predictor for HBsAg loss but identifies a potential therapeutic target for Peg-IFNα treatment. We believe our results are of great interest to a wide range of stakeholders based on their potential clinical implications.
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Affiliation(s)
- Guiwen Guan
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Ting Zhang
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Jing Ning
- Department of Gastroenterology, Peking University Third Hospital, Beijing, China
| | - Changyu Tao
- Department of Human Anatomy and Histology and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Na Gao
- Department of Infectious Diseases, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China; Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Zhenzhen Zeng
- Department of Nuclear Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Huili Guo
- Department of Infectious Diseases, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China; Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Chia-Chen Chen
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China; National Heart and Lung Institute Faculty of Medicine (NHLI), Imperial College London, Hammersmith campus, W12 0NN, London, UK
| | - Jing Yang
- School of Medicine, Shihezi University, Shihezi 832002, Xinjiang, China
| | - Jing Zhang
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Weilin Gu
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Ence Yang
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Ren Liu
- BGI-Shenzhen, Shenzhen 518083, China
| | - Xiaosen Guo
- Forensics Genomics International (FGI), BGI-Shenzhen, Shenzhen 518083, China
| | - Shan Ren
- First Department of Liver Disease Center, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Lin Wang
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Guochao Wei
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Sujun Zheng
- First Department of Liver Disease Center, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Zhiliang Gao
- Department of Infectious Diseases, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, China; Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, Guangdong 510080, China.
| | - Xinyue Chen
- First Department of Liver Disease Center, Beijing Youan Hospital, Capital Medical University, Beijing, China.
| | - Fengmin Lu
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China; Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Peking University Hepatology Institute, Peking University People's Hospital, Beijing 100044, China.
| | - Xiangmei Chen
- Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing 100191, China.
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Feraoun Y, Palgen JL, Joly C, Tchitchek N, Marcos-Lopez E, Dereuddre-Bosquet N, Gallouet AS, Contreras V, Lévy Y, Martinon F, Le Grand R, Beignon AS. The Route of Vaccine Administration Determines Whether Blood Neutrophils Undergo Long-Term Phenotypic Modifications. Front Immunol 2022; 12:784813. [PMID: 35058925 PMCID: PMC8764446 DOI: 10.3389/fimmu.2021.784813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/09/2021] [Indexed: 11/13/2022] Open
Abstract
Innate immunity modulates adaptive immunity and defines the magnitude, quality, and longevity of antigen-specific T- and B- cell immune memory. Various vaccine and administration factors influence the immune response to vaccination, including the route of vaccine delivery. We studied the dynamics of innate cell responses in blood using a preclinical model of non-human primates immunized with a live attenuated vaccinia virus, a recombinant Modified vaccinia virus Ankara (MVA) expressing a gag-pol-nef fusion of HIV-1, and mass cytometry. We previously showed that it induces a strong, early, and transient innate response, but also late phenotypic modifications of blood myeloid cells after two months when injected subcutaneously. Here, we show that the early innate effector cell responses and plasma inflammatory cytokine profiles differ between subcutaneous and intradermal vaccine injection. Additionally, we show that the intradermal administration fails to induce more highly activated/mature neutrophils long after immunization, in contrast to subcutaneous administration. Different batches of antibodies, staining protocols and generations of mass cytometers were used to generate the two datasets. Mass cytometry data were analyzed in parallel using the same analytical pipeline based on three successive clustering steps, including SPADE, and categorical heatmaps were compared using the Manhattan distance to measure the similarity between cell cluster phenotypes. Overall, we show that the vaccine per se is not sufficient for the late phenotypic modifications of innate myeloid cells, which are evocative of innate immune training. Its route of administration is also crucial, likely by influencing the early innate response, and systemic inflammation, and vaccine biodistribution.
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Affiliation(s)
- Yanis Feraoun
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Jean-Louis Palgen
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Candie Joly
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Nicolas Tchitchek
- UMR_S 959, Immunology-Immunopathology-Immunotherapy (i3), Sorbonne Université and Inserm, Paris, France
| | - Ernesto Marcos-Lopez
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Nathalie Dereuddre-Bosquet
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Anne-Sophie Gallouet
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Vanessa Contreras
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Yves Lévy
- INSERM U955, Henri Mondor Hospital, University of Paris East, Créteil, France.,Vaccine Research Institute (VRI), Créteil, France
| | - Frédéric Martinon
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Roger Le Grand
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
| | - Anne-Sophie Beignon
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-Immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Fontenay-aux-Roses, France
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Gu W, Ueda Y, Dansako H, Satoh S, Kato N. Antiviral mechanism of preclinical antimalarial compounds possessing multiple antiviral activities. FASEB Bioadv 2021; 3:356-373. [PMID: 33977235 PMCID: PMC8103717 DOI: 10.1096/fba.2020-00107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/18/2021] [Accepted: 02/09/2021] [Indexed: 11/15/2022] Open
Abstract
We previously found that N‐89 and its derivative, N‐251, which are being developed as antimalarial compounds, showed multiple antiviral activities including hepatitis C virus (HCV). In this study, we focused on the most characterized anti‐HCV activity of N‐89(N‐251) to clarify their antiviral mechanisms. We first prepared cells exhibiting resistance to N‐89(N‐251) than the parental cells by serial treatment of HCV–RNA‐replicating parental cells with N‐89(N‐251). Then, we newly generated HCV–RNA‐replicating cells with the replacement of HCV–RNAs derived from N‐89(N‐251)‐resistant cells and parental cells. Using these cells, we examined the degree of inhibition of HCV–RNA replication by N‐89(N‐251) and found that the host and viral factors contributed almost equally to the resistance to N‐89(N‐251). To further examine the contribution of the host factors, we selected several candidate genes by cDNA microarray analysis and found that the upregulated expression of at least RAC2 and CKMT1B genes independently and differently contributed to the acquisition of an N‐89(N‐251)‐resistant phenotype. For the viral factors, we selected several mutation candidates by the genetic comparative analysis of HCV–RNAs and showed that at least one M414I mutation in the HCV NS5B contributed to the resistance to N‐89. Moreover, we demonstrated that the combination of host factors (RAC2 and/or CKMT1B) and a viral factor (M414I mutation) additively increased the resistance to N‐89. In summary, we identified the host and viral factors contributing to the acquisition of N‐89(N‐251)‐resistance in HCV–RNA replication. These findings will be useful for clarification of the antiviral mechanism of N‐89(N‐251).
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Affiliation(s)
- Weilin Gu
- Department of Tumor Virology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Youki Ueda
- Department of Tumor Virology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Hiromichi Dansako
- Department of Tumor Virology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Shinya Satoh
- Department of Tumor Virology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Nobuyuki Kato
- Department of Tumor Virology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
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4
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Ayala-Suárez R, Díez-Fuertes F, Calonge E, De La Torre Tarazona HE, Gracia-Ruíz de Alda M, Capa L, Alcamí J. Insight in miRNome of Long-Term Non-Progressors and Elite Controllers Exposes Potential RNAi Role in Restraining HIV-1 Infection. J Clin Med 2020; 9:jcm9082452. [PMID: 32751854 PMCID: PMC7464121 DOI: 10.3390/jcm9082452] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/17/2020] [Accepted: 07/29/2020] [Indexed: 12/14/2022] Open
Abstract
Long-term non-progressors (LTNP) and elite controllers (EC) represent spontaneous natural models of efficient HIV-1 response in the absence of treatment. The main purposes of this work are to describe the miRNome of HIV-1 infected patients with different extreme phenotypes and identify potentially altered pathways regulated by differentially expressed (DE) miRNAs. The miRNomes from peripheral blood mononuclear cells (PBMCs) of dual phenotype EC-LTNP or LTNP with detectable viremia and HIV-infected patients with typical progression before and after treatment, were obtained through miRNA-Seq and compared among them. The administration of treatment produces 18 DE miRNAs in typical progressors. LTNP condition shows 14 DE miRNA when compared to typical progressors, allowing LTNP phenotype differentiation. A set of four miRNAs: miR-144-3p, miR-18a-5p, miR-451a, and miR-324 is strongly downregulated in LTNP and related to protein regulation as AKT, mTOR, ERK or IKK, involved in immune response pathways. Deregulation of 28 miRNA is observed between EC-LTNP and viremic-LTNP, including previously described anti-HIV miRNAs: miR-29a, associated with LTNP phenotype, and miR-155, targeting different pre-integration complexes such as ADAM10 and TNPO3. A holistic perspective of the changes observed in the miRNome of patients with different phenotypes of HIV-control and non-progression is provided.
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Affiliation(s)
- Rubén Ayala-Suárez
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
| | - Francisco Díez-Fuertes
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
- HIV Unit, Hospital Clínic de Barcelona, 08036 Barcelona, Spain
- Correspondence: (F.D.-F.); (J.A.); Tel.: +34-91-822-3234 (F.D.-F.); +34-91-822-3943 (J.A.)
| | - Esther Calonge
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
| | - Humberto Erick De La Torre Tarazona
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
| | - María Gracia-Ruíz de Alda
- Sección de Enfermedades Infecciosas, Medicina Interna, Complejo Hospitalario de Navarra, 31008 Pamplona, Spain;
| | - Laura Capa
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
| | - José Alcamí
- AIDS Immunopathology Unit, National Center for Microbiology, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain; (R.A.-S.); (E.C.); (H.E.D.L.T.T.); (L.C.)
- HIV Unit, Hospital Clínic de Barcelona, 08036 Barcelona, Spain
- Correspondence: (F.D.-F.); (J.A.); Tel.: +34-91-822-3234 (F.D.-F.); +34-91-822-3943 (J.A.)
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5
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Moar P, Sushmita K, Kateriya S, Tandon R. Transcriptional profiling indicates cAMP-driven reversal of HIV latency in monocytes occurs via transcription factor SP-1. Virology 2020; 542:40-53. [PMID: 32056667 DOI: 10.1016/j.virol.2020.01.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/11/2020] [Accepted: 01/14/2020] [Indexed: 01/16/2023]
Abstract
Latent HIV reservoir is a major barrier to absolute HIV cure. Studies on latency reversal agents (LRA) have by far focused mainly on CD4+ T-lymphocytes, while myeloid reservoirs remain under-represented despite their persistence and key contribution to HIV pathogenesis. cAMP has been shown to increase HIV-1 transcription in latently-infected monocytes/macrophages. In this communication, we explored the potential of commercially available pharmacological drugs and phosphodiesterase inhibitors to reactivate HIV in latently-infected monocytic cell-line, U1. We showed that increased levels of intracellular cAMP reverse HIV latency in vitro, which is specific to cells of the myeloid lineage. High throughput RNA-seq analysis revealed that cAMP modulates transcriptional profile of latently HIV-infected cells and provides favourable cellular environment for HIV to produce viral proteins. This reactivation of latent HIV was inhibited by Mithramycin A, a selective Sp1 inhibitor, indicating that the reversal of HIV latency in monocytes is driven by transcription factor Sp1.
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Affiliation(s)
- Preeti Moar
- Laboratory of AIDS Research and Immunology, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Kumari Sushmita
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Suneel Kateriya
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Ravi Tandon
- Laboratory of AIDS Research and Immunology, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India.
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6
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Jiang X, He M, Bai J, Chan CB, Wong AOL. Signal Transduction for TNFα-Induced Type II SOCS Expression and Its Functional Implication in Growth Hormone Resistance in Carp Hepatocytes. Front Endocrinol (Lausanne) 2020; 11:20. [PMID: 32082258 PMCID: PMC7003395 DOI: 10.3389/fendo.2020.00020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 01/13/2020] [Indexed: 01/15/2023] Open
Abstract
In mammals, local production of tumor necrosis factor α (TNFα) inhibits growth hormone (GH)-induced IGF-I expression at tissue level and contributes to GH resistance caused by sepsis/endotoxemia and inflammation. Although the loss of GH responsiveness can be mediated by a parallel rise in SOCS expression, the signaling mechanisms for TNFα-induced SOCS expression at the hepatic level have not been characterized and the comparative aspects of the phenomenon, especially in lower vertebrates, are still unknown. Recently, type II SOCS, including SOCS1-3 and CISH, have been cloned in grass carp and shown to act as the feedback repressors for GH signaling via JAK2/STAT5 pathway. To shed light on the mechanisms for TNFα-induced GH resistance in fish model, grass carp TNFα was cloned and confirmed to be a single-copy gene expressed in various tissues including the liver. In carp hepatocytes, incubation with the endotoxin LPS induced TNFα expression with parallel rises in SOCS1-3 and CISH mRNA levels. Similar to LPS, TNFα treatment could block GH-induced IGF-I/-II mRNA expression and elevate SOCS1, SOCS3, and CISH transcript levels. However, TNFα was not effective in altering SOCS2 expression. In parallel experiment, LPS blockade of IGF-I/-II signals caused by GH could be partially reverted by TNFα receptor antagonism. At hepatocyte level, TNFα induction also triggered rapid phosphorylation of IκBα, MEK1/2, ERK1/2, MKK3/6, P38MAPK, Akt, JAK2, and STAT1,3,5, and TNFα-induced SOCS1, SOCS3, and CISH mRNA expression could be negated by inhibiting the IKK/NFκB, MAPK, PI3K/Akt, and JAK/STAT cascades. Our findings, as a whole, suggest that local production of TNFα may interfere with IGF-I/-II induction by GH in the carp liver by up-regulation of SOCS1, SOCS3, and CISH via IKK/NFκB, MAPK, PI3K/Akt, and JAK/STAT-dependent mechanisms, which may contribute to GH resistance induced by endotoxin in carp species.
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7
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Luo X, Chen XX, Qiao S, Li R, Xie S, Zhou X, Deng R, Zhou EM, Zhang G. Porcine Reproductive and Respiratory Syndrome Virus Enhances Self-Replication via AP-1-Dependent Induction of SOCS1. THE JOURNAL OF IMMUNOLOGY 2019; 204:394-407. [PMID: 31826939 DOI: 10.4049/jimmunol.1900731] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/07/2019] [Indexed: 12/25/2022]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has caused tremendous economic losses in the swine industry since its emergence in the late 1980s. PRRSV exploits various strategies to evade immune responses and establish chronic persistent infections. Suppressor of cytokine signaling (SOCS) 1, a member of the SOCS family, is a crucial intracellular negative regulator of innate immunity. In this study, it was shown that SOCS1 can be co-opted by PRRSV to evade host immune responses, facilitating viral replication. It was observed that PRRSV induced SOCS1 production in porcine alveolar macrophages, monkey-derived Marc-145 cells, and porcine-derived CRL2843-CD163 cells. SOCS1 inhibited the expression of IFN-β and IFN-stimulated genes, thereby markedly enhancing PRRSV replication. It was observed that the PRRSV N protein has the ability to upregulate SOCS1 production and that nuclear localization signal-2 (NLS-2) is essential for SOCS1 induction. Moreover, SOCS1 upregulation was dependent on p38/AP-1 and JNK/AP-1 signaling pathways rather than classical type I IFN signaling pathways. In summary, to our knowledge, the findings of this study uncovered the molecular mechanism that underlay SOCS1 induction during PRRSV infection, providing new insights into viral immune evasion and persistent infection.
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Affiliation(s)
- Xuegang Luo
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, People's Republic of China.,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Xin-Xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Sha Xie
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Xinyu Zhou
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - Ruiguang Deng
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and
| | - En-Min Zhou
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, People's Republic of China
| | - Gaiping Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, People's Republic of China; .,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, People's Republic of China; and.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, Jiangsu, People's Republic of China
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8
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Sood V, Lata S, Ramachandran VG, Banerjea AC. Suppressor of Cytokine Signaling 3 (SOCS3) Degrades p65 and Regulate HIV-1 Replication. Front Microbiol 2019; 10:114. [PMID: 30766526 PMCID: PMC6365456 DOI: 10.3389/fmicb.2019.00114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 01/18/2019] [Indexed: 01/11/2023] Open
Abstract
Human Immunodeficiency Virus-1 (HIV-1) is known to induce the expression of SOCS3 which is a negative feed-back regulator of inflammatory responses. Here, we demonstrate that reactivation of latent HIV-1 leads to degradation of SOCS3 at early time points. Interestingly, SOCS3 degradation following transfection of HIV-1 RNA as well as polyIC in THP-1 cells further confirmed the role of viral RNA signaling in SOCS3 biology. Degradation of SOCS3 contributes toward viral RNA induced inflammatory responses. NF-κB signaling is also induced upon HIV-1 infection which leads to the production of pro-inflammatory cytokines to control the viral spread. Further investigations revealed that SOCS3 inhibits the expression and activity of p65 by interacting with it and inducing its ubiquitin-dependent proteasomal degradation. SH2 domain was critical for SOCS3-p65 interaction and p65 degradation. We also found that expression of SOCS3 promotes HIV-1 replication. Thus, HIV-1 downregulates SOCS3 in early phase of infection to promote inflammatory responses for large production of activated cells which are suitable for viral spread and induces SOCS3 later on to limit inflammatory responses and ensure viral survival.
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Affiliation(s)
- Vikas Sood
- Department of Microbiology, University College of Medical Sciences and GTB Hospital, New Delhi, India.,Virology Lab II, National Institute of Immunology, New Delhi, India
| | - Sneh Lata
- Department of Microbiology, University College of Medical Sciences and GTB Hospital, New Delhi, India.,Virology Lab II, National Institute of Immunology, New Delhi, India
| | | | - Akhil C Banerjea
- Virology Lab II, National Institute of Immunology, New Delhi, India
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9
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Leber A, Hontecillas R, Zoccoli-Rodriguez V, Bassaganya-Riera J. Activation of LANCL2 by BT-11 Ameliorates IBD by Supporting Regulatory T Cell Stability Through Immunometabolic Mechanisms. Inflamm Bowel Dis 2018; 24:1978-1991. [PMID: 29718324 PMCID: PMC6241665 DOI: 10.1093/ibd/izy167] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Inflammatory bowel disease (IBD) afflicts 5 million people and is increasing in prevalence. There is an unmet clinical need for safer and effective treatments for IBD. The BT-11 is a small molecule oral therapeutic that ameliorates IBD by targeting lanthionine synthetase C-like 2 (LANCL2) and has a benign safety profile in rats. METHODS Mdr1a-/-, dextran sodium sulphate , and adoptive transfer mouse models of colitis were employed to validate therapeutic efficacy and characterize the mechanisms of therapeutic efficacy of BT-11. In vitro cultures of CD4+ T cell differentiation and human peripheral blood mononuclear cells from Crohn's disease patients were used to determine its potential for human translation. RESULTS BT-11 reduces inflammation in multiple mouse models of IBD. Oral treatment with BT-11 increases the numbers of lamina propria regulatory T cells (Tregs) in a LANCL2-dependent manner. In vitro, BT-11 increases the differentiation in Treg phenotypes, the upregulation of genes implicated in Treg cell stability, and conditions Treg cells to elicit greater suppressive actions. These immunoregulatory effects are intertwined with the ability of BT-11 to regulate late stage glycolysis and tricarboxylic acid cycle. Immunometabolic mechanistic findings translate into human peripheral blood mononuclear cells from healthy individuals and Crohn's disease patients. CONCLUSIONS BT-11 is a safe, efficacious oral therapeutic for IBD with a human translatable mechanism of action that involves activation of LANCL2, immunometabolic modulation of CD4+ T cell subsets leading to stable regulatory phenotypes in the colonic LP.
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Affiliation(s)
| | | | | | - Josep Bassaganya-Riera
- Landos Biopharma Inc, Blacksburg, VA,Correspondence address: Dr Josep Bassaganya-Riera Landos Biopharma Inc, 1800 Kraft Drive, Suite 216 Blacksburg VA 24060. E-mail:
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10
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IL-23 signaling in Th17 cells is inhibited by HIV infection and is not restored by HAART: Implications for persistent immune activation. PLoS One 2017; 12:e0186823. [PMID: 29091911 PMCID: PMC5665519 DOI: 10.1371/journal.pone.0186823] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/09/2017] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES HIV infection causes a profound depletion of gut derived Th17 cells, contributing to loss of mucosal barrier function and an increase in microbial translocation, thus driving systemic immune activation. Despite normalization of circulating CD4+ T cell counts with highly active antiretroviral therapy (HAART), Th17 frequency and function often remain impaired. Given the importance of interleukin (IL)-23 in the generation and stabilization of Th17 cells we hypothesized that impaired IL-23 signaling causes persistent Th17 dysfunction in HIV infection. METHODS The effects of in vitro HIV infection on responses to IL-23 in Th17 cells were examined. These included the production of IL-17, phosphorylated STAT3 (pSTAT3) and the transcription of retinoic acid orphan receptor C (RORC) gene. Blood derived Th17 cells from untreated and HAART-treated HIV-infected individuals were also examined for the IL-23 induced production of phosphorylated STAT3 (pSTAT3) and the expression of the IL-23 receptors. RESULTS In vitro HIV infection significantly inhibited IL-17 production and IL-23 induced pSTAT3 while expression of RORC RNA was unaffected. Th17 cells isolated from untreated and HAART-treated HIV-infected individuals showed complete loss of IL-23 induced pSTAT3 without a decrease in the expression of the IL-23 receptors. CONCLUSIONS This study is the first to demonstrate an effect of HIV on the IL-23 signaling pathway in Th17 cells. We show that in vitro and in vivo HIV infection results in impaired IL-23 signaling which is not reversed by HAART nor is it a result of reduced receptor expression, suggesting that HIV interferes with IL-23-activated signaling pathways. These findings may explain the inability of HAART to restore Th17 frequency and function and the resulting persistent chronic immune activation observed in HIV infected individuals.
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11
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Gajanayaka N, O'Hara S, Konarski Y, Fernandes J, Muthumani K, Kozlowski M, Angel JB, Kumar A. HIV and HIV-Tat inhibit LPS-induced IL-27 production in human macrophages by distinct intracellular signaling pathways. J Leukoc Biol 2017; 102:925-939. [PMID: 28698313 DOI: 10.1189/jlb.4a0716-332rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 07/09/2017] [Accepted: 07/11/2017] [Indexed: 11/24/2022] Open
Abstract
Monocyte-derived Mϕs (MDMs) from HIV-infected patients and MDM infected in vitro with HIV exhibit a reduced ability to secrete various cytokines, including IL-12. Recently, IL-27, an IL-12 family cytokine, was shown to inhibit HIV replication in Mϕ. Whether HIV infection or HIV accessory protein(s) impact IL-27 production in Mϕs remains unknown. Herein, we show that in vitro HIV infection, as well as intracellular HIV-Tat (Tat) and Tat peptides, inhibit LPS-induced IL-27 production in human MDMs, suggesting impairment of the TLR4 signaling pathway. To understand the signaling pathways governing HIV or Tat-mediated inhibition of LPS-induced IL-27 production, we first demonstrated that p38 MAPK, PI3K, Src-homology region 2 domain-containing tyrosine phosphatase 1 (SHP-1), and Src kinases regulate LPS-induced IL-27 production in MDMs. Tat caused down-regulation of TNFR-associated factor (TRAF)-6 and inhibitor of apoptosis 1 (cIAP-1) and subsequently decreased phosphorylation of downstream PI3K and p38 MAPKs, which were implicated in LPS-induced IL-27 production. Whereas SHP-1 and Src kinases regulated LPS-induced IL-27 production, Tat did not inhibit these kinases, suggesting that they were not involved in Tat-mediated inhibition of LPS-induced IL-27 production. In contrast to Tat, in vitro HIV infection of MDM inhibited LPS-induced IL-27 production via inhibition of p38 MAPK activation. Overall, HIV and Tat inhibit LPS-induced IL-27 production in human macrophages via distinct mechanisms: Tat through the inhibition of cIAP-1-TRAF-6 and subsequent inhibition of PI3K and p38 MAPKs, whereas HIV through the inhibition of p38 MAPK activation.
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Affiliation(s)
- Niranjala Gajanayaka
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada.,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Shifawn O'Hara
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada.,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Yulia Konarski
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada.,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Jason Fernandes
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Kar Muthumani
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Maya Kozlowski
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Jonathan B Angel
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada.,Ottawa Hospital Research Institute, Ottawa, Ontario, Canada; and
| | - Ashok Kumar
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, Ontario, Canada; .,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada.,Department Pathology and Laboratory Medicine, University of Ottawa, Ottawa, Ontario, Canada
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12
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Ensoli B, Nchabeleng M, Ensoli F, Tripiciano A, Bellino S, Picconi O, Sgadari C, Longo O, Tavoschi L, Joffe D, Cafaro A, Francavilla V, Moretti S, Pavone Cossut MR, Collacchi B, Arancio A, Paniccia G, Casabianca A, Magnani M, Buttò S, Levendal E, Ndimande JV, Asia B, Pillay Y, Garaci E, Monini P. HIV-Tat immunization induces cross-clade neutralizing antibodies and CD4(+) T cell increases in antiretroviral-treated South African volunteers: a randomized phase II clinical trial. Retrovirology 2016; 13:34. [PMID: 27277839 PMCID: PMC4899930 DOI: 10.1186/s12977-016-0261-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/14/2016] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Although combined antiretroviral therapy (cART) has saved millions of lives, it is incapable of full immune reconstitution and virus eradication. The transactivator of transcription (Tat) protein is a key human immunodeficiency virus (HIV) virulence factor required for virus replication and transmission. Tat is expressed and released extracellularly by infected cells also under cART and in this form induces immune dysregulation, and promotes virus reactivation, entry and spreading. Of note, anti-Tat antibodies are rare in natural infection and, when present, correlate with asymptomatic state and reduced disease progression. This suggested that induction of anti-Tat antibodies represents a pathogenesis-driven intervention to block progression and to intensify cART. Indeed Tat-based vaccination was safe, immunogenic and capable of immune restoration in an open-label, randomized phase II clinical trial conducted in 168 cART-treated volunteers in Italy. To assess whether B-clade Tat immunization would be effective also in patients with different genetic background and infecting virus, a phase II trial was conducted in South Africa. METHODS The ISS T-003 was a 48-week randomised, double-blinded, placebo-controlled trial to evaluate immunogenicity (primary endpoint) and safety (secondary endpoint) of B-clade Tat (30 μg) given intradermally, three times at 4-week intervals, in 200 HIV-infected adults on effective cART (randomised 1:1) with CD4(+) T-cell counts ≥200 cells/µL. Study outcomes also included cross-clade anti-Tat antibodies, neutralization, CD4(+) T-cell counts and therapy compliance. RESULTS Immunization was safe and well-tolerated and induced durable, high titers anti-Tat B-clade antibodies in 97 % vaccinees. Anti-Tat antibodies were cross-clade (all vaccinees tested) and neutralized Tat-mediated entry of oligomeric B-clade and C-clade envelope in dendritic cells (24 participants tested). Anti-Tat antibody titers correlated positively with neutralization. Tat vaccination increased CD4(+) T-cell numbers (all participants tested), particularly when baseline levels were still low after years of therapy, and this had a positive correlation with HIV neutralization. Finally, in cART non-compliant patients (24 participants), vaccination contained viral load rebound and maintained CD4(+) T-cell numbers over study entry levels as compared to placebo. CONCLUSIONS The data indicate that Tat vaccination can restore the immune system and induces cross-clade neutralizing anti-Tat antibodies in patients with different genetic backgrounds and infecting viruses, supporting the conduct of phase III studies in South Africa. Trial registration ClinicalTrials.gov NCT01513135, 01/23/2012.
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Affiliation(s)
- Barbara Ensoli
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.
| | | | - Fabrizio Ensoli
- Laboratory of Clinical Pathology and Microbiology, San Gallicano Institute, Istituti Fisioterapici Ospitalieri, Rome, Italy
| | - Antonella Tripiciano
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,Laboratory of Clinical Pathology and Microbiology, San Gallicano Institute, Istituti Fisioterapici Ospitalieri, Rome, Italy
| | - Stefania Bellino
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,National Center for Epidemiology, Surveillance and Health Promotion, Istituto Superiore di Sanità, Rome, Italy
| | - Orietta Picconi
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy
| | - Cecilia Sgadari
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy
| | - Olimpia Longo
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,Italian Medicines Agency, Rome, Italy
| | - Lara Tavoschi
- Head Office, National AIDS Center, Istituto Superiore di Sanità, Cape Town, South Africa.,European Center for Disease Prevention and Control, Stockholm, Sweden
| | - Daniel Joffe
- Head Office, National AIDS Center, Istituto Superiore di Sanità, Cape Town, South Africa
| | - Aurelio Cafaro
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy
| | - Vittorio Francavilla
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,Laboratory of Clinical Pathology and Microbiology, San Gallicano Institute, Istituti Fisioterapici Ospitalieri, Rome, Italy
| | - Sonia Moretti
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy
| | | | | | - Angela Arancio
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,Laboratory of Clinical Pathology and Microbiology, San Gallicano Institute, Istituti Fisioterapici Ospitalieri, Rome, Italy
| | - Giovanni Paniccia
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy.,Laboratory of Clinical Pathology and Microbiology, San Gallicano Institute, Istituti Fisioterapici Ospitalieri, Rome, Italy
| | - Anna Casabianca
- Department of Biomolecular Science, University of Urbino, Urbino, Italy
| | - Mauro Magnani
- Department of Biomolecular Science, University of Urbino, Urbino, Italy
| | - Stefano Buttò
- National AIDS Center, Istituto Superiore di Sanità, Rome, Italy
| | - Elise Levendal
- South African Medical Research Council, Cape Town, South Africa.,Health Systems Trust, Cape Town, South Africa
| | | | - Bennett Asia
- National Department of Health, Pretoria, South Africa
| | - Yogan Pillay
- National Department of Health, Pretoria, South Africa
| | - Enrico Garaci
- Istituto Superiore di Sanità, Rome, Italy.,University of Tor Vergata, Rome, Italy
| | - Paolo Monini
- Head Office, National AIDS Center, Istituto Superiore di Sanità, Cape Town, South Africa
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13
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Aparecida Silva Barbosa A, Freitas Versiani A, Fonseca da Cunha Sousa L, Silva de Miranda A, Gasparini MR, Brant F, Silva DG, Luisa Quintino-de-Carvalho I, Marianetti Soriani F, Guimarães da Fonseca F, César Vasconcelos A, da Silva Barcelos L, Martins Teixeira M, Lúcio Teixeira A, Machado FS, Barbosa-Stancioli EF, Rachid MA. Role of the suppressor of cytokine signaling 2 (SOCS2) during meningoencephalitis caused by Bovine herpesvirus 5 (BoHV-5). Comp Immunol Microbiol Infect Dis 2016; 47:26-31. [PMID: 27477504 DOI: 10.1016/j.cimid.2016.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 04/17/2016] [Accepted: 05/12/2016] [Indexed: 11/17/2022]
Abstract
The role of suppressors of cytokine signaling (SOCS) in meningoencephalitis caused by Bovine herpesvirus 5 (BoHV-5) was evaluated by intracranial infection in C57BL/6 wild-type mice (WT) and SOCS2 deficient mice (SOCS2(-/-)). Both infected groups presented weight loss, ruffled fur and hunched posture. Additionally, infected SOCS2(-/-) mice showed swollen chamfer and progressive depression. Infected WT animals developed mild meningitis, characterized by infiltration of mononuclear cells. Moreover, viral DNA was detected in liver and lung from infected WT group. This group also showed elevated brain levels of IFN-γ, IL-10, CXCL1 and CCL5, when compared with non-infected WT animals. Brain inflammation was exacerbated in infected SOCS2(-/-) mice with widespread distribution of the virus and increased brain levels of TNF-α, IFN-γ, IL-10, IL-12, CXCL1 and CCL5, when compared with WT infected mice. Moreover, infected SOCS2 deficient mice exhibited reduced brain mRNA expression of IFNα and IFNβ and increased expression of mRNA of SOCS1, compared with infected WT mice. Taken together, our study provides an insight into the role of SOCS2 in modulating the immune response to BoHV-5 infection.
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Affiliation(s)
| | - Alice Freitas Versiani
- Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | | | - Aline Silva de Miranda
- Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | | | - Fátima Brant
- Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | - Daniele Gonçalves Silva
- Departamentos de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | | | | | | | - Anilton César Vasconcelos
- Departamentos de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | - Lucíola da Silva Barcelos
- Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | - Mauro Martins Teixeira
- Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | - Antônio Lúcio Teixeira
- Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, School of Medicine, University of Texas Health Science Center at Houston, TX, USA.
| | - Fabiana Simão Machado
- Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
| | | | - Milene Alvarenga Rachid
- Departamentos de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, MG, Brazil.
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14
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Jiang X, Xiao J, He M, Ma A, Wong AOL. Type II SOCS as a feedback repressor for GH-induced Igf1 expression in carp hepatocytes. J Endocrinol 2016; 229:171-86. [PMID: 27271287 DOI: 10.1530/joe-15-0423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 03/14/2016] [Indexed: 01/16/2023]
Abstract
Type II suppressor of cytokine signaling (SOCS) serve as feedback repressors for cytokines and are known to inhibit growth hormone (GH) actions. However, direct evidence for SOCS modulation of GH-induced insulin-like growth factor 1 (Igf1) expression is lacking, and the post-receptor signaling for SOCS expression at the hepatic level is still unclear. To shed light on the comparative aspects of SOCS in GH functions, grass carp was used as a model to study the role of type II SOCS in GH-induced Igf1 expression. Structural identity of type II SOCS, Socs1-3 and cytokine-inducible SH2-containing protein (Cish), was established in grass carp by 5'/3'-RACE, and their expression at both transcript and protein levels were confirmed in the liver by RT-PCR and LC/MS/MS respectively. In carp hepatocytes, GH treatment induced rapid phosphorylation of JAK2, STATs, MAPK, PI3K, and protein kinase B (Akt) with parallel rises in socs1-3 and cish mRNA levels, and these stimulatory effects on type II SOCS were shown to occur before the gradual loss of igf1 gene expression caused by prolonged exposure of GH. Furthermore, GH-induced type II SOCS gene expression could be negated by inhibiting JAK2, STATs, MEK1/2, P38 (MAPK), PI3K, and/or Akt respectively. In CHO cells transfected with carp GH receptor, over-expression of these newly cloned type II SOCS not only suppressed JAK2/STAT5 signaling with GH treatment but also inhibited GH-induced grass carp Igf1 promoter activity. These results, taken together, suggest that type II SOCS could be induced by GH in the carp liver via JAK2/STATs, MAPK, and PI3K/Akt cascades and serve as feedback repressors for GH signaling and induction of igf1 gene expression.
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Affiliation(s)
- Xue Jiang
- School of Biological SciencesUniversity of Hong Kong, Pokfulam, Hong Kong
| | - Jia Xiao
- School of Biological SciencesUniversity of Hong Kong, Pokfulam, Hong Kong
| | - Mulan He
- School of Biological SciencesUniversity of Hong Kong, Pokfulam, Hong Kong
| | - Ani Ma
- School of Biological SciencesUniversity of Hong Kong, Pokfulam, Hong Kong
| | - Anderson O L Wong
- School of Biological SciencesUniversity of Hong Kong, Pokfulam, Hong Kong
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15
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Navari M, Etebari M, De Falco G, Ambrosio MR, Gibellini D, Leoncini L, Piccaluga PP. The presence of Epstein-Barr virus significantly impacts the transcriptional profile in immunodeficiency-associated Burkitt lymphoma. Front Microbiol 2015; 6:556. [PMID: 26113842 PMCID: PMC4462103 DOI: 10.3389/fmicb.2015.00556] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 05/20/2015] [Indexed: 11/20/2022] Open
Abstract
Burkitt lymphoma (BL) is an aggressive neoplasm derived from mature, antigen-experienced B-lymphocytes. Three clinical/epidemiological variants have been recognized, named sporadic, endemic and immunodeficiency-associated BL (ID-BL). Although they are listed within a unique entity in the current WHO Classification, recent evidence indicated genetic and transcriptional differences among the three sub-groups. Further, the presence of latently persisting Epstein-Barr virus (EBV) has been associated with specific features in endemic and sporadic cases. In this study, we explored for the first time whether EBV infection could be related with a specific molecular profile in immunodeficiency-associated cases. We studied 30 BL cases, including nine occurring in HIV-positive patients (5 EBV-positive and 4 EBV-negative) by gene and microRNA (miRNA) expression profiling. We found that ID-BL presented with different profiles based on EBV presence. Specifically, 252 genes were differentially expressed, some of them being involved in intracellular signaling and apoptosis regulation. Furthermore, 28 miRNAs including both EBV-encoded (N = 18) and cellular (N = 10) ones were differentially regulated. Of note, genes previously demonstrated to be targeted by such miRNA were consistently found among differentially expressed genes, indicating the relevant contribution of miRNA to the molecular profile of the examined cases. Grippingly, 17 out of the 252 differentially expressed genes turned out to be potentially targeted by both cellular and EBV-encoded miRNA, suggesting a complex interaction and not excluding a potential synergism. In conclusion, we documented transcriptional differences based on the presence of EBV in ID-BL, and suggested a complex interaction between cellular and viral molecules in the determination of the global molecular profile of the tumor.
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Affiliation(s)
- Mohsen Navari
- Hematopathology Section, Department of Experimental, Diagnostic, and Specialty Medicine, S. Orsola-Malpighi Hospital, Bologna University School of Medicine Bologna, Italy ; Department of Basic Sciences, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh, Iran
| | - Maryam Etebari
- Hematopathology Section, Department of Experimental, Diagnostic, and Specialty Medicine, S. Orsola-Malpighi Hospital, Bologna University School of Medicine Bologna, Italy
| | - Giulia De Falco
- School of Biological and Chemical Sciences, Queen Mary University of London London, UK
| | - Maria R Ambrosio
- Department of Medical Biotechnology, University of Siena Siena, Italy
| | - Davide Gibellini
- Microbiology and Virology Unit, Department of Pathology and Diagnostic, University of Verona Verona, Italy
| | - Lorenzo Leoncini
- Department of Medical Biotechnology, University of Siena Siena, Italy
| | - Pier Paolo Piccaluga
- Hematopathology Section, Department of Experimental, Diagnostic, and Specialty Medicine, S. Orsola-Malpighi Hospital, Bologna University School of Medicine Bologna, Italy
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16
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Krishnan G, Chatterjee N. Differential immune mechanism to HIV-1 Tat variants and its regulation by AEA [corrected]. Sci Rep 2015; 5:9887. [PMID: 25943894 PMCID: PMC4421801 DOI: 10.1038/srep09887] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 03/18/2015] [Indexed: 01/06/2023] Open
Abstract
In the retina, Müller glia is a dominant player of immune response. The HIV-1 transactivator viral protein (Tat) induces production of several neurotoxic cytokines in retinal cells. We show that HIV-1 clades Tat B and C act differentially on Müller glia, which is reflected in apoptosis, activation of cell death pathway components and pro-inflammatory cytokines. The harsher immune-mediated pathology of Tat B, as opposed to milder effects of Tat C, manifests at several signal transduction pathways, notably, MAPK, STAT, SOCS, the NFκB signalosome, and TTP. In activated cells, anandamide (AEA), acting as an immune-modulator, suppresses Tat B effect through MKP-1 but Tat C action via MEK-1. AEA lowers nuclear NF-κB and TAB2 for both variants while elevating IRAK1BP1 in activated Müller glia. Müller glia exposed to Tat shows enhanced PBMC attachment. Tat-induced increase in leukocyte adhesion to Müller cells can be mitigated by AEA, involving both CB receptors. This study identifies multiple signalling components that drive immune-mediated pathology and contribute to disease severity in HIV clades. We show that the protective effects of AEA occur at various stages in cytokine generation and are clade-dependant.
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Affiliation(s)
- Gopinath Krishnan
- 1] L&T Department of Ocular Pathology, Vision Research Foundation, Sankara Nethralaya, 41 College Road, Chennai, 600006 India [2] Research Scholar, CeNTAB, School of Chemical and Biotechnology, SASTRA University, Tanjore, India
| | - Nivedita Chatterjee
- L&T Department of Ocular Pathology, Vision Research Foundation, Sankara Nethralaya, 41 College Road, Chennai, 600006 India
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17
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Luzzi A, Morettini F, Gazaneo S, Mundo L, Onnis A, Mannucci S, Rogena EA, Bellan C, Leoncini L, De Falco G. HIV-1 Tat induces DNMT over-expression through microRNA dysregulation in HIV-related non Hodgkin lymphomas. Infect Agent Cancer 2014; 9:41. [PMID: 25705251 PMCID: PMC4334912 DOI: 10.1186/1750-9378-9-41] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/14/2014] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND A close association between HIV infection and the development of cancer exists. Although the advent of highly active antiretroviral therapy has changed the epidemiology of AIDS-associated malignancies, a better understanding on how HIV can induce malignant transformation will help the development of novel therapeutic agents. METHODS HIV has been reported to induce the expression of DNMT1 in vitro, but still no information is available about the mechanisms regulating DNMT expression in HIV-related B-cell lymphomas. In this paper, we investigated the expression of DNMT family members (DNMT1, DNMT3a/b) in primary cases of aggressive B-cell lymphomas of HIV-positive subjects. RESULTS Our results confirmed the activation of DNMT1 by HIV in vivo, and reported for the first time a marked up-regulation of DNMT3a and DNMT3b in HIV-positive aggressive B-cell lymphomas. DNMT up-regulation in HIV-positive tumors correlated with down-regulation of specific microRNAs, as the miR29 family, the miR148-152 cluster, known to regulate their expression. Literature reports the activation of DNMTs by the human polyomavirus BKV large T-antigen and adenovirus E1a, through the pRb/E2F pathway. We have previously demonstrated that the HIV Tat protein is able to bind to the pocket proteins and to inactivate their oncosuppressive properties, resulting in uncontrolled cell proliferation. Therefore, we focused on the role of Tat, due to its capability to be released from infected cells and to dysregulate uninfected ones, using an in vitro model in which Tat was ectopically expressed in B-cells. CONCLUSIONS Our findings demonstrated that the ectopic expression of Tat was per se sufficient to determine DNMT up-regulation, based on microRNA down-regulation, and that this results in aberrant hypermethylation of target genes and microRNAs. These results point at a direct role for Tat in participating in uninfected B-cell lymphomagenesis, through dysregulation of the epigenetical control of gene expression.
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Affiliation(s)
- Anna Luzzi
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Federica Morettini
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Sara Gazaneo
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Lucia Mundo
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Anna Onnis
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Susanna Mannucci
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Emily A Rogena
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
- />Department of Pathology, University of Nairobi, Nairobi, Kenya
| | - Cristiana Bellan
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Lorenzo Leoncini
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Giulia De Falco
- />Department of Medical Biotechnologies, University of Siena, Siena, Italy
- />School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
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Ma F, Liu D. 17β-trenbolone, an anabolic-androgenic steroid as well as an environmental hormone, contributes to neurodegeneration. Toxicol Appl Pharmacol 2014; 282:68-76. [PMID: 25461682 DOI: 10.1016/j.taap.2014.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 11/12/2014] [Accepted: 11/17/2014] [Indexed: 01/17/2023]
Abstract
Both genetic and environmental factors contribute to neurodegenerative disorders. In a large number of neurodegenerative diseases (for example, Alzheimer's disease (AD)), patients do not carry the mutant genes. Other risk factors, for example the environmental factors, should be evaluated. 17β-trenbolone is a kind of environmental hormone as well as an anabolic-androgenic steroid. 17β-trenbolone is used as a growth promoter for livestock in the USA. Also, a large portion of recreational exercisers inject 17β-trenbolone in large doses and for very long time to increase muscle and strength. 17β-trenbolone is stable in the environment after being excreted. In the present study, 17β-trenbolone was administered to adult and pregnant rats and the primary hippocampal neurons. 17β-trenbolone's distribution and its effects on serum hormone levels and Aβ42 accumulation in vivo and its effects on AD related parameters in vitro were assessed. 17β-trenbolone accumulated in adult rat brain, especially in the hippocampus, and in the fetus brain. It altered Aβ42 accumulation. 17β-trenbolone induced apoptosis of primary hippocampal neurons in vitro and resisted neuroprotective function of testosterone. Presenilin-1 protein expression was down-regulated while β-amyloid peptide 42 (Aβ42) production and caspase-3 activities were increased. Both androgen and estrogen receptors mediated the processes. 17β-trenbolone played critical roles in neurodegeneration. Exercisers who inject large doses of trenbolone and common people who are exposed to 17β-trenbolone by various ways are all influenced chronically and continually. Identification of such environmental risk factors will help us take early prevention measure to slow down the onset of neurodegenerative disorders.
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Affiliation(s)
- Fucui Ma
- Wenzhou Institute of Biomaterials and Engineering, No. 16 Xinshan Road, Hi-tech Industry Park, Wenzhou, PR China; Key Laboratory of Animal Resistance, College of Life Science, Shandong Normal University, 88 East Wenhua Road, Jinan 250014, PR China.
| | - Daicheng Liu
- Key Laboratory of Animal Resistance, College of Life Science, Shandong Normal University, 88 East Wenhua Road, Jinan 250014, PR China.
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Bouwman RD, Palser A, Parry CM, Coulter E, Rasaiyaah J, Kellam P, Jenner RG. Human immunodeficiency virus Tat associates with a specific set of cellular RNAs. Retrovirology 2014; 11:53. [PMID: 24990269 PMCID: PMC4086691 DOI: 10.1186/1742-4690-11-53] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 06/18/2014] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Human Immunodeficiency Virus 1 (HIV-1) exhibits a wide range of interactions with the host cell but whether viral proteins interact with cellular RNA is not clear. A candidate interacting factor is the trans-activator of transcription (Tat) protein. Tat is required for expression of virus genes but activates transcription through an unusual mechanism; binding to an RNA stem-loop, the transactivation response element (TAR), with the host elongation factor P-TEFb. HIV-1 Tat has also been shown to alter the expression of host genes during infection, contributing to viral pathogenesis but, whether Tat also interacts with cellular RNAs is unknown. RESULTS Using RNA immunoprecipitation coupled with microarray analysis, we have discovered that HIV-1 Tat is associated with a specific set of human mRNAs in T cells. mRNAs bound by Tat share a stem-loop structural element and encode proteins with common biological roles. In contrast, we do not find evidence that Tat associates with microRNAs or the RNA-induced silencing complex (RISC). The interaction of Tat with cellular RNA requires an intact RNA binding domain and Tat RNA binding is linked to an increase in RNA abundance in cell lines and during infection of primary CD4+ T cells by HIV. CONCLUSIONS We conclude that Tat interacts with a specific set of human mRNAs in T cells, many of which show changes in abundance in response to Tat and HIV infection. This work uncovers a previously unrecognised interaction between HIV and its host that may contribute to viral alteration of the host cellular environment.
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Affiliation(s)
| | | | | | | | | | | | - Richard G Jenner
- MRC Centre for Medical Molecular Virology, Division of Infection and Immunity, University College London, London WC1E 6BT, UK.
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20
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Douville RN, Nath A. Human endogenous retroviruses and the nervous system. HANDBOOK OF CLINICAL NEUROLOGY 2014; 123:465-85. [PMID: 25015500 DOI: 10.1016/b978-0-444-53488-0.00022-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Renée N Douville
- Department of Microbiology, University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Avindra Nath
- Section of Infections of the Nervous System, National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD, USA.
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Delgado-Ortega M, Marc D, Dupont J, Trapp S, Berri M, Meurens F. SOCS proteins in infectious diseases of mammals. Vet Immunol Immunopathol 2012; 151:1-19. [PMID: 23219158 PMCID: PMC7112700 DOI: 10.1016/j.vetimm.2012.11.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 10/31/2012] [Accepted: 11/13/2012] [Indexed: 12/17/2022]
Abstract
As for most biological processes, the immune response to microbial infections has to be tightly controlled to remain beneficial for the host. Inflammation is one of the major consequences of the host's immune response. For its orchestration, this process requires a fine-tuned interplay between interleukins, endothelial cells and various types of recruited immune cells. Suppressors of cytokine signalling (SOCS) proteins are crucially involved in the complex control of the inflammatory response through their actions on various signalling pathways including the JAK/STAT and NF-κB pathways. Due to their cytokine regulatory functions, they are frequent targets for exploitation by infectious agents trying to escape the host's immune response. This review article aims to summarize our current knowledge regarding SOCS family members in the different mammalian species studied so far, and to display their complex molecular interactions with microbial pathogens.
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Affiliation(s)
- Mario Delgado-Ortega
- Institut National de la Recherche Agronomique (INRA), UMR1282 Infectiologie et Santé Publique, F-37380 Nouzilly, France
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22
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Caveolin-1 suppresses human immunodeficiency virus-1 replication by inhibiting acetylation of NF-κB. Virology 2012; 432:110-9. [PMID: 22748181 DOI: 10.1016/j.virol.2012.05.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 03/24/2012] [Accepted: 05/22/2012] [Indexed: 12/22/2022]
Abstract
Caveolin-1 is an integral membrane protein primarily responsible for the formation of membrane structures known as caveolae. Caveolae are specialized lipid rafts involved in protein trafficking, cholesterol homeostasis, and a number of signaling functions. It has been demonstrated that caveolin-1 suppresses HIV-1 protein expression. We found that co-transfecting cells with HIV-1 and caveolin-1 constructs, results in a marked decrease in the level of HIV-1 transcription relative to cells transfected with HIV-1 DNA alone. Correspondingly, reduction of endogenous caveolin-1 expression by siRNA-mediated silencing resulted in an enhancement of HIV-1 replication. Further, we observed a loss of caveolin-mediated suppression of HIV-1 transcription in promoter studies with reporters containing mutations in the NF-κB binding site. Our analysis of the posttranslational modification status of the p65 subunit of NF-κB demonstrates hypoacetylation of p65 in the presence of caveolin-1. Since hypoacetylated p65 has been shown to inhibit transcription, we conclude that caveolin-1 inhibits HIV-1 transcription through a NF-κB-dependent mechanism.
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23
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Lim B, Jun HJ, Kim AY, Kim S, Choi J, Kim J. The TFG-TEC fusion gene created by the t(3;9) translocation in human extraskeletal myxoid chondrosarcomas encodes a more potent transcriptional activator than TEC. Carcinogenesis 2012; 33:1450-8. [PMID: 22581839 DOI: 10.1093/carcin/bgs164] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The t(3;9)(q11-q12;q22) translocation associated with human extraskeletal myxoid chondrosarcomas results in a chimeric molecule in which the N-terminal domain (NTD) of the TFG (TRK-fused gene) is fused to the TEC (Translocated in Extraskeletal Chondrosarcoma) gene. Little is known about the biological function of TFG-TEC. Because the NTDs of TFG-TEC and TEC are structurally different, and the TFG itself is a cytoplasmic protein, the functional consequences of this fusion in extraskeletal myxoid chondrosarcomas were examined. The results showed that the chimeric gene encoded a nuclear protein that bound DNA with the same sequence specificity as the parental TEC protein. Comparison of the transactivation properties of TFG-TEC and TEC indicated that the former has higher transactivation activity for a known target reporter containing TEC-binding sites. Additional reporter assays for TFG (NTD) showed that the TGF (NTD) of TFG-TEC induced a 12-fold increase in the activation of luciferase from a reporter plasmid containing GAL4 binding sites when fused to the DNA-binding domain of GAL4, indicating that the TFG (NTD) of the TFG-TEC protein has intrinsic transcriptional activation properties. Finally, deletion analysis of the functional domains of TFG (NTD) indicated that the PB1 (Phox and Bem1p) and SPYGQ-rich region of TFG (NTD) were capable of activating transcription and that full integrity of TFG (NTD) was necessary for full transactivation. These results suggest that the oncogenic effect of the t(3;9) translocation may be due to the TFG-TEC chimeric protein and that fusion of the TFG (NTD) to the TEC protein produces a gain-of-function chimeric product.
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Affiliation(s)
- Bobae Lim
- Laboratory of Molecular and Cellular Biology, Department of Life Science, Sogang University Seoul 121-742, Korea
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24
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Trovato M, Krebs SJ, Haigwood NL, De Berardinis P. Delivery strategies for novel vaccine formulations. World J Virol 2012; 1:4-10. [PMID: 24175206 PMCID: PMC3782264 DOI: 10.5501/wjv.v1.i1.4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/16/2011] [Accepted: 09/25/2011] [Indexed: 02/05/2023] Open
Abstract
A major challenge in vaccine design is to identify antigen presentation and delivery systems capable of rapidly stimulating both the humoral and cellular components of the immune system to elicit a strong and sustained immunity against different viral isolates. Approaches to achieve this end involve live attenuated and inactivated virions, viral vectors, DNA, and protein subunits. This review reports the state of current antigen delivery, and focuses on two innovative systems recently established at our labs. These systems are the filamentous bacteriophage fd and an icosahedral scaffold formed by the acyltransferase component (E2 protein) of the pyruvate dehydrogenase complex of Bacillus stearothermophilus.
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Affiliation(s)
- Maria Trovato
- Maria Trovato, Piergiuseppe De Berardinis, Institute of Protein Biochemistry, CNR, Naples 80131, Italy
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25
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Hu J, Lou D, Carow B, Winerdal ME, Rottenberg M, Wikström AC, Norstedt G, Winqvist O. LPS regulates SOCS2 transcription in a type I interferon dependent autocrine-paracrine loop. PLoS One 2012; 7:e30166. [PMID: 22291912 PMCID: PMC3264591 DOI: 10.1371/journal.pone.0030166] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 12/11/2011] [Indexed: 02/06/2023] Open
Abstract
Recent studies suggest that SOCS2 is involved in the regulation of TLR signaling. In this study, we found that the expression of SOCS2 is regulated in human monocyte-derived DC by ligands stimulating TLR2, 3, 4, 5, 8 and 9 signaling. SOCS2 induction by LPS was dependent on the type I IFN regulated transcription factors IRF1 and IRF3 as shown by using silencing RNAs for IRFs. Blocking endogenous type I IFN signaling, by neutralizing antibodies to the receptor IFNAR2, abolished SOCS2 mRNA expression after TLR4 stimulation. Transcription factors STAT3, 5 and 6 displayed putative binding sites in the promoter regions of the human SOCS2 gene. Subsequent silencing experiments further supported that STAT3 and STAT5 are involved in LPS induced SOCS2 regulation. In mice we show that SOCS2 mRNA induction is 45% lower in bone marrow derived macrophages derived from MyD88−/− mice, and do not increase in BMMs from IRF3−/− mice after BCG infection. In conclusion, our results suggest that TLR4 signaling indirectly increases SOCS2 in late phase mainly via the production of endogenous type I IFN, and that subsequent IFN receptor signaling activates SOCS2 via STAT3 and STAT5.
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Affiliation(s)
- Jin Hu
- Translational Immunology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Trauma Orthopedic and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, People's Republic of China
| | - DaoHua Lou
- Translational Immunology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Berit Carow
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Malin E. Winerdal
- Translational Immunology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Martin Rottenberg
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | | | - Gunnar Norstedt
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Ola Winqvist
- Translational Immunology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
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HIV-1 trans-activator protein dysregulates IFN-γ signaling and contributes to the suppression of autophagy induction. AIDS 2011; 25:15-25. [PMID: 21099673 DOI: 10.1097/qad.0b013e328340fd61] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE AND DESIGN HIV-1 transactivator protein, Tat, has been identified as an activator of HIV-1 replication. It also dysregulates cytokine production and apoptosis in T-cells. Of the various cell death processes, autophagy is a self-digestion and degradation mechanism that recycles the contents of the cytosol, including macromolecules and cellular organelles, resulting in self-repair and conservation for survival. Recent reports demonstrated that autophagosomes can be activated by interferon-γ (IFN-γ) to participate in immune defence by processing foreign antigens for the recognition and killing of intracellular pathogens. As we previously showed that HIV-1 Tat perturbs IFN-γ signaling through the suppression of STAT1 phosphorylation and consequently inhibits major histocompatibility complex class-II antigen expression, we postulate that Tat plays a role in regulating autophagy. METHODS The role of STAT1 in IFN-γ-induced autophagy in primary human blood macrophages was examined using a small molecule inhibitor or siRNA specific for STAT1. The effect of HIV-1 Tat on autophagy was investigated by pretreating the macrophages with HIV-1 Tat and followed by IFN-γ stimulation. The expressions of autophagy-associated genes and their effects on engulfing mycobacteria were examined. RESULTS The activation of STAT1 resulted in IFN-γ-induced LC3B protein expression and autophagosome formation. As postulated, HIV-1 Tat protein suppressed IFN-γ-induced autophagy processes, including LC3B expression. Additionally, HIV-1 Tat restricted the capturing of mycobacteria by autophagosomes. CONCLUSION HIV-1 Tat suppressed the induction of autophagy-associated genes and inhibited the formation of autophagosomes. Perturbation of such cellular processes by HIV-1 would impair the effective containment of invading pathogens, thereby providing a favorable environment for opportunistic microbes in HIV-infected individuals.
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27
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Isolation and identification of anti-inflammatory constituents from Ligusticum chuanxiong and their underlying mechanisms of action on microglia. Neuropharmacology 2010; 60:823-31. [PMID: 21146552 DOI: 10.1016/j.neuropharm.2010.12.002] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 12/01/2010] [Accepted: 12/01/2010] [Indexed: 01/02/2023]
Abstract
Stroke is the third most common cause of death worldwide. Recent findings showed that the severity of cerebrovascular diseases including ischemic stroke correlates with inflammation mediated responses in the neural cells. During ischemia, inflammatory mediators including tumor necrosis factor-alpha (TNF-α) and nitric oxide are produced by microglia, which play a central role in the pathogenesis of the disease. Ligusticum chuanxiong (LCX) is a commonly used traditional Chinese medicine (TCM) for empiric treatment of cerebrovascular and cardiovascular diseases for many centuries. By applying a bioactivity-guided fractionation scheme, two compounds with inhibition on neuroinflammation were isolated from LCX. Using chromatographic and spectrometric methods, they were identified to be senkyunolide A and Z-ligustilide. They could inhibit the production of proinflammatory mediators in lipopolysaccharide (LPS)-stimulated murine BV-2 microglial cells and human peripheral blood monocyte derived macrophages. In addition, both compounds protected Neuro-2a cells from neuroinflammatory toxicity induced by the conditioned culture media produced by LPS-stimulated BV-2 cells. The underlying mechanisms of action of senkyunolide A were further delineated. Its inhibitory effects were shown to be independent of the phosphorylation of mitogen-activated protein kinases (MAPK) and translocation of nuclear factor kappa B (NF-κB). However, senkyunolide A could increase the degradation of TNF-α mRNA and reduce its half life by 43%. In conclusion, bioactivity-guided fractionation is an effective way of isolating bioactive compounds from medicinal herbs. In addition, senkyunolide A and Z-ligustilide isolated from LCX may be considered as potential complementary drug candidates for treating inflammatory processes associated with cerebrovascular diseases.
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Abstract
Over the past decade, a family of host proteins known as suppressors of cytokine signaling (SOCS) have emerged as frequent targets of viral exploitation. Under physiologic circumstances, SOCS proteins negatively regulate inflammatory signaling pathways by facilitating ubiquitination and proteosomal degradation of pathway machinery. Their expression is tightly regulated to prevent excessive inflammation while maintaining protective antipathogenic responses. Numerous viruses, however, have developed mechanisms to induce robust host SOCS protein expression following infection, essentially "hijacking" SOCS function to promote virus survival. To date, SOCS proteins have been shown to inhibit protective antiviral signaling pathways, allowing viruses to evade the host immune response, and to ubiquitinate viral proteins, facilitating intracellular viral trafficking and progeny virus assembly. Importantly, manipulation of SOCS proteins not only facilitates progression of the viral life cycle but also powerfully shapes the presentation of viral disease. SOCS proteins can define host susceptibility to infection, contribute to peripheral disease manifestations such as immune dysfunction and cancer, and even modify the efficacy of therapeutic interventions. Looking toward the future, it is clear that a better understanding of the role of SOCS proteins in viral diseases will be essential in our struggle to modulate and even eliminate the pathogenic effects of viruses on the host.
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29
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Abstract
Over the past decade, a family of host proteins known as suppressors of cytokine signaling (SOCS) have emerged as frequent targets of viral exploitation. Under physiologic circumstances, SOCS proteins negatively regulate inflammatory signaling pathways by facilitating ubiquitination and proteosomal degradation of pathway machinery. Their expression is tightly regulated to prevent excessive inflammation while maintaining protective antipathogenic responses. Numerous viruses, however, have developed mechanisms to induce robust host SOCS protein expression following infection, essentially "hijacking" SOCS function to promote virus survival. To date, SOCS proteins have been shown to inhibit protective antiviral signaling pathways, allowing viruses to evade the host immune response, and to ubiquitinate viral proteins, facilitating intracellular viral trafficking and progeny virus assembly. Importantly, manipulation of SOCS proteins not only facilitates progression of the viral life cycle but also powerfully shapes the presentation of viral disease. SOCS proteins can define host susceptibility to infection, contribute to peripheral disease manifestations such as immune dysfunction and cancer, and even modify the efficacy of therapeutic interventions. Looking toward the future, it is clear that a better understanding of the role of SOCS proteins in viral diseases will be essential in our struggle to modulate and even eliminate the pathogenic effects of viruses on the host.
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Bivalkar-Mehla S, Vakharia J, Mehla R, Abreha M, Kanwar JR, Tikoo A, Chauhan A. Viral RNA silencing suppressors (RSS): novel strategy of viruses to ablate the host RNA interference (RNAi) defense system. Virus Res 2010; 155:1-9. [PMID: 20951748 DOI: 10.1016/j.virusres.2010.10.003] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2010] [Revised: 09/28/2010] [Accepted: 10/05/2010] [Indexed: 12/13/2022]
Abstract
Pathogenic viruses have developed a molecular defense arsenal for their survival by counteracting the host anti-viral system known as RNA interference (RNAi). Cellular RNAi, in addition to regulating gene expression through microRNAs, also serves as a barrier against invasive foreign nucleic acids. RNAi is conserved across the biological species, including plants, animals and invertebrates. Viruses in turn, have evolved mechanisms that can counteract this anti-viral defense of the host. Recent studies of mammalian viruses exhibiting RNA silencing suppressor (RSS) activity have further advanced our understanding of RNAi in terms of host-virus interactions. Viral proteins and non-coding viral RNAs can inhibit the RNAi (miRNA/siRNA) pathway through different mechanisms. Mammalian viruses having dsRNA-binding regions and GW/WG motifs appear to have a high chance of conferring RSS activity. Although, RSSs of plant and invertebrate viruses have been well characterized, mammalian viral RSSs still need in-depth investigations to present the concrete evidences supporting their RNAi ablation characteristics. The information presented in this review together with any perspective research should help to predict and identify the RSS activity-endowed new viral proteins that could be the potential targets for designing novel anti-viral therapeutics.
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Affiliation(s)
- Shalmali Bivalkar-Mehla
- Dept of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
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31
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Role of HIV-1 Tat in AIDS pathogenesis: its effects on cytokine dysregulation and contributions to the pathogenesis of opportunistic infection. AIDS 2010; 24:1609-23. [PMID: 20588103 DOI: 10.1097/qad.0b013e32833ac6a0] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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32
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Akhtar LN, Qin H, Muldowney MT, Yanagisawa LL, Kutsch O, Clements JE, Benveniste EN. Suppressor of cytokine signaling 3 inhibits antiviral IFN-beta signaling to enhance HIV-1 replication in macrophages. THE JOURNAL OF IMMUNOLOGY 2010; 185:2393-404. [PMID: 20631305 DOI: 10.4049/jimmunol.0903563] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
HIV-1 replication within macrophages of the CNS often results in cognitive and motor impairment, which is known as HIV-associated dementia (HAD) in its most severe form. IFN-beta suppresses viral replication within these cells during early CNS infection, but the effect is transient. HIV-1 eventually overcomes this protective innate immune response to resume replication through an unknown mechanism, initiating the progression toward HAD. In this article, we show that Suppressor of Cytokine Signaling (SOCS)3, a molecular inhibitor of IFN signaling, may allow HIV-1 to evade innate immunity within the CNS. We found that SOCS3 is elevated in an in vivo SIV/macaque model of HAD and that the pattern of expression correlates with recurrence of viral replication and onset of CNS disease. In vitro, the HIV-1 regulatory protein transactivator of transcription induces SOCS3 in human and murine macrophages in a NF-kappaB-dependent manner. SOCS3 expression attenuates the response of macrophages to IFN-beta at proximal levels of pathway activation and downstream antiviral gene expression and consequently overcomes the inhibitory effect of IFN-beta on HIV-1 replication. These studies indicate that SOCS3 expression, induced by stimuli present in the HIV-1-infected brain, such as transactivator of transcription, inhibits antiviral IFN-beta signaling to enhance HIV-1 replication in macrophages. This consequence of SOCS3 expression in vitro, supported by a correlation with increased viral load and onset of CNS disease in vivo, suggests that SOCS3 may allow HIV-1 to evade the protective innate immune response within the CNS, allowing the recurrence of viral replication and, ultimately, promoting progression toward HAD.
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33
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Bruel T, Guibon R, Melo S, Guillén N, Salmon H, Girard-Misguich F, Meurens F. Epithelial induction of porcine suppressor of cytokine signaling 2 (SOCS2) gene expression in response to Entamoeba histolytica. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2010; 34:562-571. [PMID: 20045027 DOI: 10.1016/j.dci.2009.12.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 12/23/2009] [Accepted: 12/27/2009] [Indexed: 05/28/2023]
Abstract
Suppressor of cytokine signaling (SOCS) proteins are key physiological regulators of both innate and adaptive immunity. These proteins belong to the three major classes of modulators of cytokines signaling. In the following article, we used porcine polarized intestinal cells to study early response to the protozoan, Entamoeba histolytica, and we identified by rapid amplification of cDNA ends (RACE) PCR porcine SOCS1, SOCS4, SOCS5 and SOCS6 encoding sequences. With more than 92% identity predicted porcine SOCS proteins are very similar to their human counterparts. Among SOCS transcripts, only SOCS2 mRNA was significantly induced in epithelial intestinal cells in response to the cytolytic activity of the parasite. The transcriptomic profile obtained after 3h of co-culture of polarized intestinal cells with E. histolytica was clearly oriented toward inflammation and the recruitment of neutrophils. These transcriptomic data have been normalized with accuracy by the utilisation of multiple validated reference genes. The analysis offers a first set of reference genes useful for future studies in porcine intestinal cells. Our data shed light on the understanding of the early response of polarized intestinal cells to E. histolytica and identified a potential involvement of SOCS2 in the parasite regulation of the host response.
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Affiliation(s)
- Timothée Bruel
- Institut National de la Recherche Agronomique, UR1282, Infectiologie Animale et Santé Publique, Nouzilly, Tours, France
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Cheung BKW, Yim HCH, Lee NCM, Lau ASY. A novel anti-mycobacterial function of mitogen-activated protein kinase phosphatase-1. BMC Immunol 2009; 10:64. [PMID: 20017901 PMCID: PMC2804704 DOI: 10.1186/1471-2172-10-64] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Accepted: 12/17/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mycobacterium tuberculosis (MTB) is a major cause of morbidity and mortality in the world. To combat against this pathogen, immune cells release cytokines including tumor necrosis factor-alpha (TNF-alpha), which is pivotal in the development of protective granulomas. Our previous results showed that Bacillus Calmette Guerin (BCG), a mycobacterium used as a model to investigate the immune response against MTB, stimulates the induction of TNF-alpha via mitogen-activated protein kinase (MAPK) in human blood monocytes. Since MAPK phosphatase-1 (MKP-1) is known to regulate MAPK activities, we examined whether MKP-1 plays a role in BCG-induced MAPK activation and cytokine expression. RESULTS Primary human blood monocytes were treated with BCG and assayed for MKP-1 expression. Our results demonstrated that following exposure to BCG, there was an increase in the expression of MKP-1. Additionally, the induction of MKP-1 was regulated by p38 MAPK and extracellular signal-regulated kinase 1 and 2 (ERK1/2). Surprisingly, when MKP-1 expression was blocked by its specific siRNA, there was a significant decrease in the levels of phospho-MAPK (p38 MAPK and ERK1/2) and TNF-alpha inducible by BCG. CONCLUSIONS Since TNF-alpha is pivotal in granuloma formation, the results indicated an unexpected positive function of MKP-1 against mycobacterial infection as opposed to its usual phosphatase activity.
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Affiliation(s)
- Benny K W Cheung
- Cytokine Biology Group, Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, PR China.
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