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Samareh B, Klimenkova O, Aghaallaei N, Cheng L, Zikic A, Loghmani H, Müller P, Suttorp M, Welte K, Skokowa J, Morishima T. NAMPT-mediated deacetylation of HCLS1 protein promotes clonogenic growth of pediatric CML cells. Exp Hematol 2025:104801. [PMID: 40349748 DOI: 10.1016/j.exphem.2025.104801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2024] [Revised: 04/21/2025] [Accepted: 04/30/2025] [Indexed: 05/14/2025]
Abstract
Pediatric chronic myeloid leukemia (CML) is a rare hematological malignancy with biological features that differ from that of adult patients. In pediatric CML patients the burden of tumor cells is higher resulting in a delayed achievement of deep molecular response (DMR) upon treatment with tyrosine kinase inhibitors (TKIs, e.g. imatinib) than what has been reported in adults. Therefore, the probability to develop resistance to TKIs in children with CML is higher than in adults due to much longer exposure to TKIs. Moreover, in children with CML, long-term treatment with imatinib causes hematologic and non-hematologic toxicities. Improvements of CML therapy in pediatric patients based on the targeting of hematopoiesis-specific BCR::ABL1 downstream effectors are needed. Here, we report elevated levels of the Nicotinamide phosphoribosyltransferase (NAMPT) in mononuclear cells of chronic phase CML (CP-CML) pediatric patients and in blastic phase CML cell lines. NAMPT inhibition abrogated in vitro clonogenic capacity and proliferation of CML cells. NAMPT deacetylates and activates the hematopoietic-specific lyn-substrate 1 (HCLS1) protein, which is essential for the proliferation of CML cells. Moreover, IL1RAP - a marker of myeloid leukemia initiating cells - and LEF-1 - a transcription factor of Wnt signaling - are downstream targets of NAMPT/HCLS1 pathway. Together, our results reveal new treatment avenues of pediatric CML patients by targeting NAMPT-mediated deacetylation of the hematopoietic-specific HCLS1 protein. Teaser Abstract Pediatric chronic myeloid leukemia (CML) patients need long-term tyrosine kinase inhibitor treatment which causes toxicities. Therefore, improvements of CML therapy in pediatric patients are needed. Here, we report elevated levels of the Nicotinamide phosphoribosyltransferase (NAMPT) in chronic phase pediatric CML cells. NAMPT inhibition abrogated in vitro clonogenic capacity and proliferation of CML cells. NAMPT deacetylates and activates the hematopoietic-specific lyn-substrate 1 (HCLS1) protein. Moreover, IL1RAP - a marker of myeloid leukemia initiating cells - is a downstream target of NAMPT/HCLS1 pathway. Together, our results reveal new treatment avenues of pediatric CML patients.
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Affiliation(s)
- Bardia Samareh
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Olga Klimenkova
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Narges Aghaallaei
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Lijuan Cheng
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Andrew Zikic
- Faculty of Medicine, University of Toronto, 1 King´s College Cir, Toronto, ON M5S 1A8, Canada
| | - Houra Loghmani
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Patrick Müller
- Friedrich Miescher Laboratory of the Max Planck Society, Max-Planck-Ring 9, 72076 Tübingen, Germany
| | - Meinolf Suttorp
- Pediatric Hematology and Oncology, Medical Faculty, Technical University Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Karl Welte
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany; Department of Pediatric Hematology, Oncology and Bone Marrow Transplantation, University Hospital Tübingen, Hoppe-Seyler-Strasse 1, 72076 Tübingen, Germany
| | - Julia Skokowa
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
| | - Tatsuya Morishima
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany.
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Andrysik Z, Espinosa JM. Harnessing p53 for targeted cancer therapy: new advances and future directions. Transcription 2025; 16:3-46. [PMID: 40031988 PMCID: PMC11970777 DOI: 10.1080/21541264.2025.2452711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2024] [Revised: 01/07/2025] [Accepted: 01/08/2025] [Indexed: 03/05/2025] Open
Abstract
The transcription factor p53 is the most frequently impaired tumor suppressor in human cancers. In response to various stress stimuli, p53 activates transcription of genes that mediate its tumor-suppressive functions. Distinctive characteristics of p53 outlined here enable a well-defined program of genes involved in cell cycle arrest, apoptosis, senescence, differentiation, metabolism, autophagy, DNA repair, anti-viral response, and anti-metastatic functions, as well as facilitating autoregulation within the p53 network. This versatile, anti-cancer network governed chiefly by a single protein represents an immense opportunity for targeted cancer treatment, since about half of human tumors retain unmutated p53. During the last two decades, numerous compounds have been developed to block the interaction of p53 with the main negative regulator MDM2. However, small molecule inhibitors of MDM2 only induce a therapeutically desirable apoptotic response in a limited number of cancer types. Moreover, clinical trials of the MDM2 inhibitors as monotherapies have not met expectations and have revealed hematological toxicity as a characteristic adverse effect across this drug class. Currently, combination treatments are the leading strategy for enhancing efficacy and reducing adverse effects of MDM2 inhibitors. This review summarizes efforts to identify and test therapeutics that work synergistically with MDM2 inhibitors. Two main types of drugs have emerged among compounds used in the following combination treatments: first, modulators of the p53-regulated transcriptome (including chromatin modifiers), translatome, and proteome, and second, drugs targeting the downstream pathways such as apoptosis, cell cycle arrest, DNA repair, metabolic stress response, immune response, ferroptosis, and growth factor signaling. Here, we review the current literature in this field, while also highlighting overarching principles that could guide target selection in future combination treatments.
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Affiliation(s)
- Zdenek Andrysik
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Linda Crnic Institute for Down Syndrome, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Joaquin M. Espinosa
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Linda Crnic Institute for Down Syndrome, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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3
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Kusuma IY, Habibie H, Bahar MA, Budán F, Csupor D. Anticancer Effects of Secoiridoids-A Scoping Review of the Molecular Mechanisms behind the Chemopreventive Effects of the Olive Tree Components Oleocanthal, Oleacein, and Oleuropein. Nutrients 2024; 16:2755. [PMID: 39203892 PMCID: PMC11357637 DOI: 10.3390/nu16162755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Revised: 08/09/2024] [Accepted: 08/14/2024] [Indexed: 09/03/2024] Open
Abstract
The olive tree (Olea europaea) and olive oil hold significant cultural and historical importance in Europe. The health benefits associated with olive oil consumption have been well documented. This paper explores the mechanisms of the anti-cancer effects of olive oil and olive leaf, focusing on their key bioactive compounds, namely oleocanthal, oleacein, and oleuropein. The chemopreventive potential of oleocanthal, oleacein, and oleuropein is comprehensively examined through this systematic review. We conducted a systematic literature search to identify eligible articles from Scopus, PubMed, and Web of Science databases published up to 10 October 2023. Among 4037 identified articles, there were 88 eligible articles describing mechanisms of chemopreventive effects of oleocanthal, oleacein, and oleuropein. These compounds have the ability to inhibit cell proliferation, induce cell death (apoptosis, autophagy, and necrosis), inhibit angiogenesis, suppress tumor metastasis, and modulate cancer-associated signalling pathways. Additionally, oleocanthal and oleuropein were also reported to disrupt redox hemostasis. This review provides insights into the chemopreventive mechanisms of O. europaea-derived secoiridoids, shedding light on their role in chemoprevention. The bioactivities summarized in the paper support the epidemiological evidence demonstrating a negative correlation between olive oil consumption and cancer risk. Furthermore, the mapped and summarized secondary signalling pathways may provide information to elucidate new synergies with other chemopreventive agents to complement chemotherapies and develop novel nutrition-based anti-cancer approaches.
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Affiliation(s)
- Ikhwan Yuda Kusuma
- Institute of Clinical Pharmacy, University of Szeged, 6725 Szeged, Hungary; (I.Y.K.); (M.A.B.)
- Pharmacy Study Program, Universitas Harapan Bangsa, Purwokerto 53182, Indonesia
| | - Habibie Habibie
- Department of Pharmacy, Faculty of Pharmacy, Hasanuddin University, Makassar 90245, Indonesia;
| | - Muh. Akbar Bahar
- Institute of Clinical Pharmacy, University of Szeged, 6725 Szeged, Hungary; (I.Y.K.); (M.A.B.)
- Department of Pharmacy, Faculty of Pharmacy, Hasanuddin University, Makassar 90245, Indonesia;
| | - Ferenc Budán
- Institute of Physiology, University of Pécs, 7624 Pécs, Hungary
| | - Dezső Csupor
- Institute of Clinical Pharmacy, University of Szeged, 6725 Szeged, Hungary; (I.Y.K.); (M.A.B.)
- Institute for Translational Medicine, University of Pécs, 7624 Pécs, Hungary
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Torices S, Daire L, Simon S, Naranjo O, Mendoza L, Teglas T, Fattakhov N, Adesse D, Toborek M. Occludin: a gatekeeper of brain Infection by HIV-1. Fluids Barriers CNS 2023; 20:73. [PMID: 37840143 PMCID: PMC10577960 DOI: 10.1186/s12987-023-00476-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/09/2023] [Indexed: 10/17/2023] Open
Abstract
Compromised structure and function of the blood-brain barrier (BBB) is one of the pathological hallmarks of brain infection by HIV-1. BBB damage during HIV-1 infection has been associated with modified expression of tight junction (TJ) proteins, including occludin. Recent evidence indicated occludin as a redox-sensitive, multifunctional protein that can act as both an NADH oxidase and influence cellular metabolism through AMPK kinase. One of the newly identified functions of occludin is its involvement in regulating HIV-1 infection. Studies suggest that occludin expression levels and the rate of HIV-1 infection share a reverse, bidirectional relationship; however, the mechanisms of this relationship are unclear. In this review, we describe the pathways involved in the regulation of HIV-1 infection by occludin. We propose that occludin may serve as a potential therapeutic target to control HIV-1 infection and to improve the lives of people living with HIV-1.
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Affiliation(s)
- Silvia Torices
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Leah Daire
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Sierra Simon
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Oandy Naranjo
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Luisa Mendoza
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Timea Teglas
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Nikolai Fattakhov
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
| | - Daniel Adesse
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA
- Laboratório de Biologia Estrutural, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Michal Toborek
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, 528E Gautier Bldg. 1011 NW 15th Street Miami, Miami, FL, 11336, USA.
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Adolph RS, Beck E, Schweimer K, Di Fonzo A, Weyand M, Rösch P, Wöhrl BM, Steegborn C. Molecular Mechanism of Sirtuin 1 Inhibition by Human Immunodeficiency Virus 1 Tat Protein. Life (Basel) 2023; 13:life13040949. [PMID: 37109478 PMCID: PMC10144703 DOI: 10.3390/life13040949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/20/2023] [Accepted: 03/30/2023] [Indexed: 04/08/2023] Open
Abstract
Sirtuins are NAD+-dependent protein lysine deacylases implicated in metabolic regulation and aging-related dysfunctions. The nuclear isoform Sirt1 deacetylates histones and transcription factors and contributes, e.g., to brain and immune cell functions. Upon infection by human immunodeficiency virus 1 (HIV1), Sirt1 deacetylates the viral transactivator of transcription (Tat) protein to promote the expression of the viral genome. Tat, in turn, inhibits Sirt1, leading to the T cell hyperactivation associated with HIV infection. Here, we describe the molecular mechanism of Tat-dependent sirtuin inhibition. Using Tat-derived peptides and recombinant Tat protein, we mapped the inhibitory activity to Tat residues 34–59, comprising Tat core and basic regions and including the Sirt1 deacetylation site Lys50. Tat binds to the sirtuin catalytic core and inhibits Sirt1, Sirt2, and Sirt3 with comparable potencies. Biochemical data and crystal structures of sirtuin complexes with Tat peptides reveal that Tat exploits its intrinsically extended basic region for binding to the sirtuin substrate binding cleft through substrate-like β-strand interactions, supported by charge complementarity. Tat Lys50 is positioned in the sirtuin substrate lysine pocket, although binding and inhibition do not require prior acetylation and rely on subtle differences to the binding of regular substrates. Our results provide mechanistic insights into sirtuin regulation by Tat, improving our understanding of physiological sirtuin regulation and the role of this interaction during HIV1 infection.
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Affiliation(s)
- Ramona S. Adolph
- Department of Biochemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Eileen Beck
- Department of Biochemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Kristian Schweimer
- Department of Biopolymers, University of Bayreuth, 95440 Bayreuth, Germany
| | - Andrea Di Fonzo
- Department of Biochemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Michael Weyand
- Department of Biochemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Paul Rösch
- Department of Biopolymers, University of Bayreuth, 95440 Bayreuth, Germany
| | - Birgitta M. Wöhrl
- Department of Biopolymers, University of Bayreuth, 95440 Bayreuth, Germany
| | - Clemens Steegborn
- Department of Biochemistry, University of Bayreuth, 95440 Bayreuth, Germany
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6
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Figarola-Centurión I, Escoto-Delgadillo M, González-Enríquez GV, Gutiérrez-Sevilla JE, Vázquez-Valls E, Torres-Mendoza BM. Sirtuins Modulation: A Promising Strategy for HIV-Associated Neurocognitive Impairments. Int J Mol Sci 2022; 23:643. [PMID: 35054829 PMCID: PMC8775450 DOI: 10.3390/ijms23020643] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/24/2021] [Accepted: 12/29/2021] [Indexed: 02/01/2023] Open
Abstract
HIV-Associated neurocognitive disorder (HAND) is one of the major concerns since it persists in 40% of this population. Nowadays, HAND neuropathogenesis is considered to be caused by the infected cells that cross the brain-blood barrier and produce viral proteins that can be secreted and internalized into neurons leading to disruption of cellular processes. The evidence points to viral proteins such as Tat as the causal agent for neuronal alteration and thus HAND. The hallmarks in Tat-induced neurodegeneration are endoplasmic reticulum stress and mitochondrial dysfunction. Sirtuins (SIRTs) are NAD+-dependent deacetylases involved in mitochondria biogenesis, unfolded protein response, and intrinsic apoptosis pathway. Tat interaction with these deacetylases causes inhibition of SIRT1 and SIRT3. Studies revealed that SIRTs activation promotes neuroprotection in neurodegenerative diseases such Alzheimer's and Parkinson's disease. Therefore, this review focuses on Tat-induced neurotoxicity mechanisms that involve SIRTs as key regulators and their modulation as a therapeutic strategy for tackling HAND and thereby improving the quality of life of people living with HIV.
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Affiliation(s)
- Izchel Figarola-Centurión
- Doctorado en Genética Humana, Departamento de Biología Molecular y Genómica, Universidad de Guadalajara, Guadalajara 44340, Mexico;
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (M.E.-D.); (J.E.G.-S.)
| | - Martha Escoto-Delgadillo
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (M.E.-D.); (J.E.G.-S.)
- Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Guadalajara 44600, Mexico
| | - Gracia Viviana González-Enríquez
- Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Mexico;
| | - Juan Ernesto Gutiérrez-Sevilla
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (M.E.-D.); (J.E.G.-S.)
- Microbiología Médica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Eduardo Vázquez-Valls
- Generación de Recursos Profesionales, Investigación y Desarrollo, Secretaria de Salud, Jalisco, Guadalajara 44100, Mexico;
| | - Blanca Miriam Torres-Mendoza
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara 44340, Mexico; (M.E.-D.); (J.E.G.-S.)
- Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Mexico;
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Zamaraev AV, Zhivotovsky B, Kopeina GS. Viral Infections: Negative Regulators of Apoptosis and Oncogenic Factors. BIOCHEMISTRY (MOSCOW) 2021. [PMID: 33202204 PMCID: PMC7590567 DOI: 10.1134/s0006297920100077] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The disruption of apoptotic cell death process is closely associated with the etiology of various diseases, including cancer. Permanent viral infections can cause different types of cancers. Oncogenic viruses manipulate both external and internal apoptosis pathways, and inhibit the activity of proapoptotic proteins and signaling pathways, which facilitates carcinogenesis. Ineffective immune surveillance or immune response suppression can induce uncontrolled virus propagation and host cell proliferation. In this review, we discuss current data that provide insights into mechanisms of apoptotic death suppression by viruses and their role in oncogenesis.
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Affiliation(s)
- A V Zamaraev
- Faculty of Basic Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
| | - B Zhivotovsky
- Faculty of Basic Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia.,Institute of Environmental Medicine, Karolinska Institute, Stockholm, SE-171 77, Sweden
| | - G S Kopeina
- Faculty of Basic Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia.
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8
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Cardozo CM, Hainaut P. Viral strategies for circumventing p53: the case of severe acute respiratory syndrome coronavirus. Curr Opin Oncol 2021; 33:149-158. [PMID: 33405482 PMCID: PMC7924916 DOI: 10.1097/cco.0000000000000713] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Virtually all viruses have evolved molecular instruments to circumvent cell mechanisms that may hamper their replication, dissemination, or persistence. Among these is p53, a key gatekeeper for cell division and survival that also regulates innate immune responses. This review summarizes the strategies used by different viruses and discusses the mechanisms deployed by SARS-CoV to target p53 activities. RECENT FINDINGS We propose a typology for the strategies used by different viruses to address p53 functions: hit and run (e.g. IAV, ZIKV), hide and seek (e.g. HIV1), kidnap and exploit (e.g. EBV, HSV1), dominate and suppress (e.g. HR HPV). We discuss the mechanisms by which SARS nsp3 protein targets p53 for degradation and we speculate on the significance for Covid-19 pathogenesis and risk of cancer. SUMMARY p53 may operate as an intracellular antiviral defense mechanism. To circumvent it, SARS viruses adopt a kidnap and exploit strategy also shared by several viruses with transforming potential. This raises the question of whether SARS infections may make cells permissive to oncogenic DNA damage.
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Affiliation(s)
- Camila Martin Cardozo
- Institute for Advanced Biosciences, Inserm 1209 CNRS 5309 University Grenoble-Alpes, Grenoble, France
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9
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Tagliari CFDS, de Oliveira CN, Vogel GM, da Silva PB, Linden R, Lazzaretti RK, Notti RK, Sprinz E, Mattevi VS. Investigation of SIRT1 gene variants in HIV-associated lipodystrophy and metabolic syndrome. Genet Mol Biol 2020; 43:e20190142. [PMID: 32106282 PMCID: PMC7198015 DOI: 10.1590/1678-4685-gmb-2019-0142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 11/21/2019] [Indexed: 01/17/2023] Open
Abstract
HIV-infected individuals on chronic use of highly active antiretroviral therapy (HAART) are more likely to develop adipose tissue and metabolic disorders, such as lipodystrophy (LD) and metabolic syndrome (MetS). The development of these phenotypes is known to be multifactorial. Thus, variants in genes implicated in adipogenesis and lipid metabolism may increase susceptibility to LD and MetS. Sirtuin 1 (SIRT1) may influence the outcome of these disturbances due to its role in the regulation of transcription factors involved in energy regulation. Therefore, we genotyped four polymorphisms located in SIRT1 (rs2273773 T>C, rs12413112 G>A, rs7895833 A>G, rs12049646 T>C) in 832 HIV-infected patients receiving HAART by real-time polymerase chain reaction. The prevalence of LD was 55.8% and MetS was 35.3%. Lipoatrophy was the most prevalent subtype in all samples (38.0%) and showed significant difference between white and non-white individuals (P = 0.002). None of the genetic variants investigated in SIRT1 was associated with LD and MetS. White individuals and those in longer time of HAART use were more likely to develop LD. We concluded that these SIRT1 polymorphisms are not predictive factors to the development of lipodystrophy and metabolic syndrome in HIV-infected individuals from Brazil.
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Affiliation(s)
| | - Cáren Nunes de Oliveira
- Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Laboratório de Biologia Molecular, Porto Alegre, RS, Brazil
| | - Greice Meyer Vogel
- Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Laboratório de Biologia Molecular, Porto Alegre, RS, Brazil
| | - Patrícia Baptista da Silva
- Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Laboratório de Biologia Molecular, Porto Alegre, RS, Brazil
| | - Rafael Linden
- Universidade Feevale, Instituto de Ciências da Saúde, Laboratório de Toxicologia Analítica, Novo Hamburgo, RS, Brazil
| | - Rosmeri Kuhmmer Lazzaretti
- Universidade Federal do Rio Grande do Sul, Hospital de Clínicas de Porto Alegre, Departamento de Doenças Infecciosas, Porto Alegre, RS, Brazil
| | - Regina Kuhmmer Notti
- Universidade Federal do Rio Grande do Sul, Hospital de Clínicas de Porto Alegre, Departamento de Doenças Infecciosas, Porto Alegre, RS, Brazil
| | - Eduardo Sprinz
- Universidade Federal do Rio Grande do Sul, Hospital de Clínicas de Porto Alegre, Departamento de Doenças Infecciosas, Porto Alegre, RS, Brazil
| | - Vanessa Suñé Mattevi
- Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Laboratório de Biologia Molecular, Porto Alegre, RS, Brazil
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10
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Paim AC, Badley AD, Cummins NW. Mechanisms of Human Immunodeficiency Virus-Associated Lymphocyte Regulated Cell Death. AIDS Res Hum Retroviruses 2020; 36:101-115. [PMID: 31659912 PMCID: PMC7044792 DOI: 10.1089/aid.2019.0213] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Human immunodeficiency virus-1 (HIV-1) causes CD4 T cell depletion through a number of mechanisms, including programmed cell death pathways (both apoptotic and nonapoptotic). In the setting of HIV-1 infection, the enhanced lymphocyte cell death occurs as a consequence of complex interactions between the host immune system and viral factors, which are reviewed herein. On the other hand, the main challenge to HIV-1 eradication is the development of latent infection in a subset of long lived cells, including CD4+ T cells and macrophages, which resist HIV-induced cell death. Understanding the potential mechanisms of how HIV-1 induces lymphocyte cell death is critical to the "kick and kill" cure strategy, which relies on the effective killing of reactivated, HIV-1-infected cells.
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Affiliation(s)
- Ana C. Paim
- Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota
| | - Andrew D. Badley
- Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota
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Tian S, Yan Y, Qi X, Li X, Li Z. Treatment of Type II Collagen-Induced Rat Rheumatoid Arthritis Model by Interleukin 10 (IL10)-Mesenchymal Stem Cells (BMSCs). Med Sci Monit 2019; 25:2923-2934. [PMID: 31005957 PMCID: PMC6489530 DOI: 10.12659/msm.911184] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 09/11/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis model (CIA) rats were treated by tail vein injection of IL-10-modified bone marrow mesenchymal stem cells (BMSCs) to investigate its feasibility and intrinsic molecular mechanism. MATERIAL AND METHODS The CIA rat model was established by induction type II collagen, and IL-10-modified BMSCs was established by transfecting BMSCs with adenovirus. IL-10-modified BMSCs were used to treat the CIA rats. The therapeutic effect was evaluated by measuring the changes in body weight, ankle swelling, and forced swimming time, as well as observation of synovial hyperplasia and cartilage tissue repair by HE staining. Western blot analysis and ELISA were used to detect gene expression. RESULTS After 4 weeks and 8 weeks of treatment with IL10-BMSCs, the body weight, swelling value, resting time, and forced swimming struggle time of CIA rats were significantly higher than those of BMSCs-treated and -untreated CIA rats (P<0.05). Compared to BMSCs-treated CIA model rats, after treatment with IL10-BMSCs, the repair rate of osteoarticular cartilage was higher and the inhibition of synovial proliferation was better, and serum IL-17, IL-1ß, and TNF-alpha levels were lower. We found that the protein level of SIRT1 in peripheral blood mononuclear cells was lower, the protein level in spleen was higher, and phosphorylation of p65 protein in peripheral blood mononuclear cells was reduced. CONCLUSIONS The efficacy of tail vein injection of IL-10-modified BMSCs in treatment of CIA rats was superior to that of BMSCs alone, which may be related to the more pronounced suppression of IL-10-modified BMSCs in peripheral blood inflammation and spleen immune response.
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Affiliation(s)
- Shuai Tian
- Department of Geratology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Yunyu Yan
- Department of CT/MRI, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Xiangbei Qi
- Department of Orthopaedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Xu Li
- Department of Orthopaedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Zhiyong Li
- Department of Orthopaedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
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12
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Tang J, Zhou S, Zhou F, Wen X. Inhibitory effect of tanshinone IIA on inflammatory response in rheumatoid arthritis through regulating β-arrestin 2. Exp Ther Med 2019; 17:3299-3306. [PMID: 30988705 PMCID: PMC6447808 DOI: 10.3892/etm.2019.7371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 08/31/2018] [Indexed: 12/12/2022] Open
Abstract
The current study aimed to investigate the inhibitory effect of tanshinone IIA (Tan IIA) on the inflammatory response in patients with rheumatoid arthritis (RA) and explore its mechanism. A total of 50 patients with RA were randomly separated into the control group (15 cases) and the research group (35 cases). The tumor necrosis factor (TNF)-α and interleukin (IL)-6 levels in serum were determined, and peripheral blood mononuclear cells (PBMCs) were separated from patients with RA and cultured in vitro. The effects of the β-arrestin 2 small interfering (si)RNA incubation, lipopolysaccharide (LPS) stimulation or Tan IIA incubation on TNF-α and IL-6 levels, and the expression levels of β-arrestin 2, NAD-dependent protein deacetylase sirtuin-1 (SIRT1) and transcription factor p65 (p65) proteins were investigated. Prior to treatment, no significant differences in TNF-α and IL-6 levels in serum of patients with RA were identified between the research and control groups. Following treatment, the TNF-α and IL-6 levels in the serum of patients with RA in the research group were significantly lower compared with those in the research group prior to treatment and those in the control group following treatment (P<0.05). Tan IIA inhibited the LPS-induced secretion of TNF-α and IL-6, upregulated the LPS-inhibited expression of the β-arrestin 2 and SIRT1 proteins, and downregulated the LPS-induced expression of the p65 protein in the PBMCs of patients with RA. The β-arrestin 2 small interfering (si)RNA significantly upregulated the secretion of TNF-α and IL-6, inhibited the expression of the SIRT1 protein and upregulated the expression of the p65 protein in PBMCs of patients with RA. Tan II A effectively increased the weight of rats with rheumatoid arthritis, and reduced the circumference of the left posterior ankle, the posterior plantar metatarsal thickness, and the content of serum TNF-α and IL-6. Tan IIA did not significantly reverse these β-arrestin 2 siRNA-induced changes. Tan IIA inhibited the inflammatory response in PBMCs of patients with RA by upregulating β-arrestin 2 expression.
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Affiliation(s)
- Jing Tang
- Orthopaedics Rehabilitation Center, Zhejiang Rehabilitation Medical Center, Hangzhou, Zhejiang 310051, P.R. China
| | - Siwei Zhou
- Orthopaedics Rehabilitation Center, Zhejiang Rehabilitation Medical Center, Hangzhou, Zhejiang 310051, P.R. China
| | - Fanghua Zhou
- Orthopaedics Rehabilitation Center, Zhejiang Rehabilitation Medical Center, Hangzhou, Zhejiang 310051, P.R. China
| | - Xiumei Wen
- Department of Emergency, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310005, P.R. China
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13
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Gatla HR, Muniraj N, Thevkar P, Yavvari S, Sukhavasi S, Makena MR. Regulation of Chemokines and Cytokines by Histone Deacetylases and an Update on Histone Decetylase Inhibitors in Human Diseases. Int J Mol Sci 2019; 20:E1110. [PMID: 30841513 PMCID: PMC6429312 DOI: 10.3390/ijms20051110] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/26/2019] [Accepted: 02/28/2019] [Indexed: 12/12/2022] Open
Abstract
Histone acetyltransferases (HATs) and histone deacetylases (HDACs) counteract with each other to regulate gene expression by altering chromatin structure. Aberrant HDAC activity was reported in many human diseases including wide range of cancers, viral infections, cardiovascular complications, auto-immune diseases and kidney diseases. HDAC inhibitors are small molecules designed to block the malignant activity of HDACs. Chemokines and cytokines control inflammation, immunological and other key biological processes and are shown to be involved in various malignancies. Various HDACs and HDAC inhibitors were reported to regulate chemokines and cytokines. Even though HDAC inhibitors have remarkable anti-tumor activity in hematological cancers, they are not effective in treating many diseases and many patients relapse after treatment. However, the role of HDACs and cytokines in regulating these diseases still remain unclear. Therefore, understanding exact mechanisms and effector functions of HDACs are urgently needed to selectively inhibit them and to establish better a platform to combat various malignancies. In this review, we address regulation of chemokines and cytokines by HDACs and HDAC inhibitors and update on HDAC inhibitors in human diseases.
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Affiliation(s)
- Himavanth Reddy Gatla
- Department of Pediatric Oncology, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.
| | - Nethaji Muniraj
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA.
| | - Prashanth Thevkar
- Department of Microbiology, New York University, New York, NY 10016, USA.
| | - Siddhartha Yavvari
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
| | - Sahithi Sukhavasi
- Center for Distance Learning, GITAM University, Visakhapatnam, AP 530045, India.
| | - Monish Ram Makena
- Department of Physiology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.
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14
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Chen L, Keppler OT, Schölz C. Post-translational Modification-Based Regulation of HIV Replication. Front Microbiol 2018; 9:2131. [PMID: 30254620 PMCID: PMC6141784 DOI: 10.3389/fmicb.2018.02131] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 08/20/2018] [Indexed: 12/13/2022] Open
Abstract
Human immunodeficiency virus (HIV) relies heavily on the host cellular machinery for production of viral progeny. To exploit cellular proteins for replication and to overcome host factors with antiviral activity, HIV has evolved a set of regulatory and accessory proteins to shape an optimized environment for its replication and to facilitate evasion from the immune system. Several cellular pathways are hijacked by the virus to modulate critical steps during the viral life cycle. Thereby, post-translational modifications (PTMs) of viral and cellular proteins gain increasingly attention as modifying enzymes regulate virtually every step of the viral replication cycle. This review summarizes the current knowledge of HIV-host interactions influenced by PTMs with a special focus on acetylation, ubiquitination, and phosphorylation of proteins linked to cellular signaling and viral replication. Insights into these interactions are surmised to aid development of new intervention strategies.
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Affiliation(s)
- Lin Chen
- Max von Pettenkofer-Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Oliver T Keppler
- Max von Pettenkofer-Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Christian Schölz
- Max von Pettenkofer-Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
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15
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Aloni-Grinstein R, Charni-Natan M, Solomon H, Rotter V. p53 and the Viral Connection: Back into the Future ‡. Cancers (Basel) 2018; 10:cancers10060178. [PMID: 29866997 PMCID: PMC6024945 DOI: 10.3390/cancers10060178] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 01/14/2023] Open
Abstract
The discovery of the tumor suppressor p53, through its interactions with proteins of tumor-promoting viruses, paved the way to the understanding of p53 roles in tumor virology. Over the years, accumulating data suggest that WTp53 is involved in the viral life cycle of non-tumor-promoting viruses as well. These include the influenza virus, smallpox and vaccinia viruses, the Zika virus, West Nile virus, Japanese encephalitis virus, Human Immunodeficiency Virus Type 1, Human herpes simplex virus-1, and more. Viruses have learned to manipulate WTp53 through different strategies to improve their replication and spreading in a stage-specific, bidirectional way. While some viruses require active WTp53 for efficient viral replication, others require reduction/inhibition of WTp53 activity. A better understanding of WTp53 functionality in viral life may offer new future clinical approaches, based on WTp53 manipulation, for viral infections.
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Affiliation(s)
- Ronit Aloni-Grinstein
- Department of Molecular Cell Biology, Weizmann Institute of Science, 76100 Rehovot, Israel.
- Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Box 19, 74100 Ness-Ziona, Israel.
| | - Meital Charni-Natan
- Department of Molecular Cell Biology, Weizmann Institute of Science, 76100 Rehovot, Israel.
| | - Hilla Solomon
- Department of Molecular Cell Biology, Weizmann Institute of Science, 76100 Rehovot, Israel.
| | - Varda Rotter
- Department of Molecular Cell Biology, Weizmann Institute of Science, 76100 Rehovot, Israel.
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Expression profiling of chromatin-modifying enzymes and global DNA methylation in CD4+ T cells from patients with chronic HIV infection at different HIV control and progression states. Clin Epigenetics 2018; 10:20. [PMID: 29449904 PMCID: PMC5812196 DOI: 10.1186/s13148-018-0448-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 01/24/2018] [Indexed: 12/19/2022] Open
Abstract
Background Integration of human immunodeficiency virus type 1 (HIV-1) into the host genome causes global disruption of the chromatin environment. The abundance level of various chromatin-modifying enzymes produces these alterations and affects both the provirus and cellular gene expression. Here, we investigated potential changes in enzyme expression and global DNA methylation in chronically infected individuals with HIV-1 and compared these changes with non-HIV infected individuals. We also evaluated the effect of viral replication and degree of disease progression over these changes. Results Individuals with HIV-1 had a significant surge in the expression of DNA and histone methyltransferases (DNMT3A and DNMT3B, SETDB1, SUV39H1) compared with non-infected individuals, with the exception of PRMT6, which was downregulated. Some histone deacetylases (HDAC2 and HDAC3) were also upregulated in patients with HIV. Among individuals with HIV-1 with various degrees of progression and HIV control, the group of treated patients with undetectable viremia showed greater differences with the other two groups (untreated HIV-1 controllers and non-controllers). These latter two groups exhibited a similar behavior between them. Of interest, the overexpression of genes that associate with viral protein Tat (such as SETDB1 along with DNMT3A and HDAC1, and SIRT-1) was more prevalent in treated patients. We also observed elevated levels of global DNA methylation in individuals with HIV-1 in an inverse correlation with the CD4/CD8 ratio. Conclusions The current study shows an increase in chromatin-modifying enzymes and remodelers and in global DNA methylation in patients with chronic HIV-1 infection, modulated by various levels of viral control and progression.
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Mesquita I, Vergnes B, Silvestre R. Alterations on Cellular Redox States upon Infection and Implications for Host Cell Homeostasis. EXPERIENTIA SUPPLEMENTUM (2012) 2018; 109:197-220. [PMID: 30535600 DOI: 10.1007/978-3-319-74932-7_4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The cofactors nicotinamide adenine dinucleotide (NAD+) and its phosphate form, NADP+, are crucial molecules present in all living cells. The delicate balance between the oxidized and reduced forms of these molecules is tightly regulated by intracellular metabolism assuring the maintenance of homeostatic conditions, which are essential for cell survival and proliferation. A recent cluster of data has highlighted the importance of the intracellular NAD+/NADH and NADP+/NADPH ratios during host-pathogen interactions, as fluctuations in the levels of these cofactors and in precursors' bioavailability may condition host response and, therefore, pathogen persistence or elimination. Furthermore, an increasing interest has been given towards how pathogens are capable of hijacking host cell proteins in their own advantage and, consequently, alter cellular redox states and immune function. Here, we review the basic principles behind biosynthesis and subcellular compartmentalization of NAD+ and NADP+, as well as the importance of these cofactors during infection, with a special emphasis on pathogen-driven modulation of host NAD+/NADP+ levels and contribution to the associated immune response.
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Affiliation(s)
- Inês Mesquita
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Baptiste Vergnes
- MIVEGEC (IRD 224-CNRS 5290-Université Montpellier), Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Ricardo Silvestre
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal.
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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18
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HIV-1 Tat potently stabilises Mdm2 and enhances viral replication. Biochem J 2017; 474:2449-2464. [PMID: 28468838 PMCID: PMC5509382 DOI: 10.1042/bcj20160825] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 04/23/2017] [Accepted: 05/02/2017] [Indexed: 12/31/2022]
Abstract
Murine double minute 2 (Mdm2) is known to enhance the transactivation potential of human immunodeficiency virus (HIV-1) Tat protein by causing its ubiquitination. However, the regulation of Mdm2 during HIV-1 infection and its implications for viral replication have not been well studied. Here, we show that the Mdm2 protein level increases during HIV-1 infection and this effect is mediated by HIV-1 Tat protein. Tat appears to stabilise Mdm2 at the post-translational level by inducing its phosphorylation at serine-166 position through AKT. Although p53 is one of the key players for Mdm2 induction, Tat-mediated stabilisation of Mdm2 appears to be independent of p53. Moreover, the non-phosphorylatable mutant of Mdm2 (S166A) fails to interact with Tat and shows decreased half-life in the presence of Tat compared with wild-type Mdm2. Furthermore, the non-phosphorylatable mutant of Mdm2 (S166A) is unable to support HIV-1 replication. Thus, HIV-1 Tat appears to stabilise Mdm2, which in turn enhances Tat-mediated viral replication. This study highlights the importance of post-translational modifications of host cellular factors in HIV-1 replication and pathogenesis.
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19
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Yang T, Li S, Zhang X, Pang X, Lin Q, Cao J. Resveratrol, sirtuins, and viruses. Rev Med Virol 2015; 25:431-45. [DOI: 10.1002/rmv.1858] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 09/19/2015] [Indexed: 12/25/2022]
Affiliation(s)
- Tao Yang
- College of Food Science and Technology; Central South University of Forestry and Technology; Changsha Hunan Province China
| | - Shugang Li
- Construction Corps Key Laboratory of Deep Processing on Featured Agricultural Products in South Xinjiang; Tarim University; Alar Xinjiang China
| | - Xuming Zhang
- Department of Microbiology and Immunology; University of Arkansas for Medical Sciences; Little Rock AR USA
| | - Xiaowu Pang
- Departments of Oral Pathology, College of Dentistry; Howard University; Washington DC USA
| | - Qinlu Lin
- College of Food Science and Technology; Central South University of Forestry and Technology; Changsha Hunan Province China
| | - Jianzhong Cao
- College of Food Science and Technology; Central South University of Forestry and Technology; Changsha Hunan Province China
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20
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Hou H, Wang JZ, Liu BG, Zhang T. Pin1 liberates the human immunodeficiency virus type-1 (HIV-1): Must we stop it? Gene 2015; 565:9-14. [PMID: 25913034 DOI: 10.1016/j.gene.2015.04.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 03/07/2015] [Accepted: 04/20/2015] [Indexed: 11/16/2022]
Abstract
Acquired immune deficiency syndrome (AIDS) is mainly caused by the human immunodeficiency virus type-1 (HIV-1). To our knowledge, this is the first review focusing on the vital role of Pin1 in the infection of HIV-1 and the development of AIDS. We and others have demonstrated that Pin1, the only known cis-to-trans isomerase recognizing the pThr/pSer-Pro motifs in proteins, plays striking roles in several human diseases. Interestingly, recent evidence gradually indicates that Pin1 regulates several key steps of the life cycle of HIV-1, including the uncoating of the HIV-1 core, the reverse transcription of the RNA genome of HIV-1, and the integration of the HIV-1 cDNA into human chromosomes. Whereas inhibiting Pin1 suppresses all of these key steps and attenuates the replication of HIV-1, at the same time different PIN1 gene variants are correlated with the susceptibility to HIV-1 infection. Furthermore, Pin1 potentially promotes HIV-1 infection by activating multiple oncogenes and inactivating multiple tumor suppressors, extending the life span of HIV-infected cells. These descriptions suggest Pin1 as a promising therapeutic target for the prevention of HIV-1 and highlight the possibility of blocking the development of AIDS by Pin1 inhibitors.
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Affiliation(s)
- Hai Hou
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Jing-Zhang Wang
- Affiliated Hospital, College of Medicine, Hebei University of Engineering, Handan 056002, Hebei, PR China.
| | - Bao-Guo Liu
- Affiliated Hospital, College of Medicine, Hebei University of Engineering, Handan 056002, Hebei, PR China
| | - Ting Zhang
- Affiliated Hospital, College of Medicine, Hebei University of Engineering, Handan 056002, Hebei, PR China
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21
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Torma F, Koltai E, Nagy E, Ziaaldini MM, Posa A, Koch LG, Britton SL, Boldogh I, Radak Z. Exercise Increases Markers of Spermatogenesis in Rats Selectively Bred for Low Running Capacity. PLoS One 2014; 9:e114075. [PMID: 25493948 PMCID: PMC4262201 DOI: 10.1371/journal.pone.0114075] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 11/03/2014] [Indexed: 01/14/2023] Open
Abstract
The oxidative stress effect of exercise training on testis function is under debate. In the present study we used a unique rat model system developed by artificial selection for low and high intrinsic running capacity (LCR and HCR, respectively) to evaluate the effects of exercise training on apoptosis and spermatogenesis in testis. Twenty-four 13-month-old male rats were assigned to four groups: control LCR (LCR-C), trained LCR (LCR-T), control HCR (HCR-C), and trained HCR (HCR-T). Ten key proteins connecting aerobic exercise capacity and general testes function were assessed, including those that are vital for mitochondrial biogenesis. The VO2 max of LCR-C group was about 30% lower than that of HCR-C rats, and the SIRT1 levels were also significantly lower than HCR-C. Twelve weeks of training significantly increased maximal oxygen consumption in LCR by nearly 40% whereas HCR remained unchanged. LCR-T had significantly higher levels of peroxisome proliferator-activated receptor-gamma coactivator-1 (PGC-1α), decreased levels of reactive oxygen species and increased acetylated p53 compared to LCR-C, while training produced no significant changes for these measures in HCR rats. BAX and Blc-2 were not different among all four groups. The levels of outer dense fibers -1 (Odf-1), a marker of spermatogenesis, increased in LCR-T rats, but decreased in HCR-TR rats. Moreover, exercise training increased the levels of lactate dehydrogenase C (LDHC) only in LCR rats. These data suggest that rats with low inborn exercise capacity can increase whole body oxygen consumption and running exercise capacity with endurance training and, in turn, increase spermatogenesis function via reduction in ROS and heightened activity of p53 in testes.
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Affiliation(s)
- Ferenc Torma
- Research Institute of Sport Science, Semmelweis University, Budapest, Hungary
| | - Erika Koltai
- Research Institute of Sport Science, Semmelweis University, Budapest, Hungary
| | - Enikő Nagy
- Research Institute of Sport Science, Semmelweis University, Budapest, Hungary
| | | | - Aniko Posa
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Lauren G. Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Steven L. Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Istvan Boldogh
- Department of Microbiology and Immunology, Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, Texas, United States of America
| | - Zsolt Radak
- Research Institute of Sport Science, Semmelweis University, Budapest, Hungary
- * E-mail:
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Mbita Z, Hull R, Dlamini Z. Human immunodeficiency virus-1 (HIV-1)-mediated apoptosis: new therapeutic targets. Viruses 2014; 6:3181-227. [PMID: 25196285 PMCID: PMC4147692 DOI: 10.3390/v6083181] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/12/2014] [Accepted: 07/08/2014] [Indexed: 12/18/2022] Open
Abstract
HIV has posed a significant challenge due to the ability of the virus to both impair and evade the host’s immune system. One of the most important mechanisms it has employed to do so is the modulation of the host’s native apoptotic pathways and mechanisms. Viral proteins alter normal apoptotic signaling resulting in increased viral load and the formation of viral reservoirs which ultimately increase infectivity. Both the host’s pro- and anti-apoptotic responses are regulated by the interactions of viral proteins with cell surface receptors or apoptotic pathway components. This dynamic has led to the development of therapies aimed at altering the ability of the virus to modulate apoptotic pathways. These therapies are aimed at preventing or inhibiting viral infection, or treating viral associated pathologies. These drugs target both the viral proteins and the apoptotic pathways of the host. This review will examine the cell types targeted by HIV, the surface receptors exploited by the virus and the mechanisms whereby HIV encoded proteins influence the apoptotic pathways. The viral manipulation of the hosts’ cell type to evade the immune system, establish viral reservoirs and enhance viral proliferation will be reviewed. The pathologies associated with the ability of HIV to alter apoptotic signaling and the drugs and therapies currently under development that target the ability of apoptotic signaling within HIV infection will also be discussed.
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Affiliation(s)
- Zukile Mbita
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
| | - Rodney Hull
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
| | - Zodwa Dlamini
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
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23
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Ertl R, Klein D. Transcriptional profiling of the host cell response to feline immunodeficiency virus infection. Virol J 2014; 11:52. [PMID: 24642186 PMCID: PMC3999937 DOI: 10.1186/1743-422x-11-52] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 03/12/2014] [Indexed: 11/22/2022] Open
Abstract
Background Feline immunodeficiency virus (FIV) is a widespread pathogen of the domestic cat and an important animal model for human immunodeficiency virus (HIV) research. In contrast to HIV, only limited information is available on the transcriptional host cell response to FIV infections. This study aims to identify FIV-induced gene expression changes in feline T-cells during the early phase of the infection. Illumina RNA-sequencing (RNA-seq) was used identify differentially expressed genes (DEGs) at 24 h after FIV infection. Results After removal of low-quality reads, the remaining sequencing data were mapped against the cat genome and the numbers of mapping reads were counted for each gene. Regulated genes were identified through the comparison of FIV and mock-infected data sets. After statistical analysis and the removal of genes with insufficient coverage, we detected a total of 69 significantly DEGs (44 up- and 25 down-regulated genes) upon FIV infection. The results obtained by RNA-seq were validated by reverse transcription qPCR analysis for 10 genes. Discussion and conclusion Out of the most distinct DEGs identified in this study, several genes are already known to interact with HIV in humans, indicating comparable effects of both viruses on the host cell gene expression and furthermore, highlighting the importance of FIV as a model system for HIV. In addition, a set of new genes not previously linked to virus infections could be identified. The provided list of virus-induced genes may represent useful information for future studies focusing on the molecular mechanisms of virus-host interactions in FIV pathogenesis.
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Affiliation(s)
- Reinhard Ertl
- VetCore Facility for Research, University of Veterinary Medicine Vienna, Vienna, Austria.
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Li S, Kong L, Yu X, Zheng Y. Host-virus interactions: from the perspectives of epigenetics. Rev Med Virol 2014; 24:223-41. [PMID: 24677359 DOI: 10.1002/rmv.1783] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/23/2013] [Accepted: 01/16/2014] [Indexed: 12/25/2022]
Abstract
Chromatin structure and histone modifications play key roles in gene regulation. Some virus genomes are organized into chromatin-like structure, which undergoes different histone modifications facilitating complex functions in virus life cycles including replication. Here, we present a comprehensive summary of recent research in this field regarding the interaction between viruses and host epigenetic factors with emphasis on how chromatin modifications affect viral gene expression and virus infection. We also describe the strategies employed by viruses to manipulate the host epigenetic program to facilitate virus replication as well as the underlying mechanisms. Together, knowledge from this field not only generates novel insights into virus life cycles but may also have important therapeutic implications.
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Affiliation(s)
- Shanshan Li
- Department of Plant Pathology & Microbiology, Iowa State University, Ames, IA, USA
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Abstract
The implementation of new antiretroviral therapies targeting transcription of early viral proteins in postintegrated HIV-1 can aid in overcoming current therapy limitations. Using high-throughput screening assays, we have previously described a novel Tat-dependent HIV-1 transcriptional inhibitor named 6-bromoindirubin-3'-oxime (6BIO). The screening of 6BIO derivatives yielded unique compounds that show potent inhibition of HIV-1 transcription. We have identified a second-generation derivative called 18BIOder as an inhibitor of HIV-1 Tat-dependent transcription in TZM-bl cells and a potent inhibitor of GSK-3β kinase in vitro. Structurally, 18BIOder is half the molecular weight and structure of its parental compound, 6BIO. More importantly, we also have found a different GSK-3β complex present only in HIV-1-infected cells. 18BIOder preferentially inhibits this novel kinase complex from infected cells at nanomolar concentrations. Finally, we observed that neuronal cultures treated with Tat protein are protected from Tat-mediated cytotoxicity when treated with 18BIOder. Overall, our data suggest that HIV-1 Tat-dependent transcription is sensitive to small-molecule inhibition of GSK-3β.
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Rai P, Plagov A, Lan X, Chandel N, Singh T, Lederman R, Ayasolla KR, Mathieson PW, Saleem MA, Husain M, Malhotra A, Chander PN, Singhal PC. mTOR plays a critical role in p53-induced oxidative kidney cell injury in HIVAN. Am J Physiol Renal Physiol 2013; 305:F343-54. [PMID: 23678040 PMCID: PMC3742868 DOI: 10.1152/ajprenal.00135.2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 05/08/2013] [Indexed: 11/22/2022] Open
Abstract
Oxidative stress has been implicated to contribute to HIV-induced kidney cell injury; however, the role of p53, a modulator of oxidative stress, has not been evaluated in the development of HIV-associated nephropathy (HIVAN). We hypothesized that mammalian target of rapamycin (mTOR) may be critical for the induction of p53-mediated oxidative kidney cell injury in HIVAN. To test our hypothesis, we evaluated the effect of an mTOR inhibitor, rapamycin, on kidney cell p53 expression, downstream signaling, and kidney cell injury in both in vivo and in vitro studies. Inhibition of the mTOR pathway resulted in downregulation of renal tissue p53 expression, associated downstream signaling, and decreased number of sclerosed glomeruli, tubular microcysts, and apoptosed and 8-hydroxy deoxyguanosine (8-OHdG)-positive (+ve) cells in Tg26 mice. mTOR inhibition not only attenuated kidney cell expression of p66ShcA and phospho-p66ShcA but also reactivated the redox-sensitive stress response program in the form of enhanced expression of manganese superoxide dismutase (MnSOD) and catalase. In in vitro studies, the mTOR inhibitor also provided protection against HIV-induced podocyte apoptosis. Moreover, mTOR inhibition downregulated HIV-induced podocyte (HP/HIV) p53 expression. Since HP/HIV silenced for mTOR displayed a lack of expression of p53 as well as attenuated podocyte apoptosis, this suggests that mTOR is critical for kidney cell p53 activation and associated oxidative kidney cell injury in the HIV milieu.
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Affiliation(s)
- Partab Rai
- Department of Medicine, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, Great Neck, NY, USA
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Guise AJ, Budayeva HG, Diner BA, Cristea IM. Histone deacetylases in herpesvirus replication and virus-stimulated host defense. Viruses 2013; 5:1607-32. [PMID: 23807710 PMCID: PMC3738950 DOI: 10.3390/v5071607] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 06/17/2013] [Accepted: 06/18/2013] [Indexed: 02/06/2023] Open
Abstract
Emerging evidence highlights a critical role for protein acetylation during herpesvirus infection. As prominent modulators of protein acetylation, histone deacetylases (HDACs) are essential transcriptional and epigenetic regulators. Not surprisingly, viruses have evolved a wide array of mechanisms to subvert HDAC functions. Here, we review the mechanisms underlying HDAC regulation during herpesvirus infection. We next discuss the roles of acetylation in host defense against herpesvirus infection. Finally, we provide a perspective on the contribution of current mass spectrometry-based “omic” technologies to infectious disease research, offering a systems biology view of infection.
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Affiliation(s)
| | | | | | - Ileana M. Cristea
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-609-258-9417; Fax: +1-609-258-4575
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Chaudhuri AD, Yelamanchili SV, Marcondes MCG, Fox HS. Up-regulation of microRNA-142 in simian immunodeficiency virus encephalitis leads to repression of sirtuin1. FASEB J 2013; 27:3720-9. [PMID: 23752207 DOI: 10.1096/fj.13-232678] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
MicroRNA (miR)-142 is up-regulated in the brain in HIV and SIV encephalitis (SIVE). We identified the cell types where miR-142 is up-regulated and its relevant downstream target. Fluorescent in situ hybridization combined with immunofluorescent labeling revealed that miR-142-3p and -5p are expressed within hippocampal neurons and myeloid cells in SIVE. Sirtuin1 (SIRT1) was predicted as a potential miR-142 target by analysis of its 3'-UTR and bioinformatic analysis of factors linked to altered hippocampal gene expression profile in SIVE. Overexpression of pre-miR-142 in HEK293T cells led to a 3.7-fold decrease in SIRT1 protein level. Examination of the individual effects of miR-142-5p and miR-142-3p through overexpression and inhibition studies revealed that significant effects on SIRT1 occurred only with miR-142-5p. Luciferase reporter assays revealed a 2.3-fold inhibition of expression due to interaction of miR-142 with the SIRT1 3'-UTR, mutation analysis revealed that only the miR-142-5p target site was active. MiR-142 expression in primary human neurons led to a small (1.3-fold) but significant decrease in SIRT1 protein level. Furthermore, qRT-PCR revealed up-regulation of miR-142-3p (6.4-fold) and -5p (3.9-fold) and down-regulation of SIRT1 (33-fold) in macrophages/microglia from animals with SIVE. We have therefore elucidated a miR-mediated mechanism of regulation of SIRT1 expression in SIVE.
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Affiliation(s)
- Amrita Datta Chaudhuri
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198-5800, USA
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The role of thiamine in HIV infection. Int J Infect Dis 2012; 17:e221-7. [PMID: 23274124 DOI: 10.1016/j.ijid.2012.11.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 11/21/2012] [Accepted: 11/24/2012] [Indexed: 12/15/2022] Open
Abstract
Patients infected with HIV have a high prevalence of thiamine deficiency. Genetic studies have provided the opportunity to determine which proteins link thiamine to HIV pathology, i.e., renin-angiotensin system, poly(ADP-ribosyl) polymerase 1, Sp1 promoter gene, transcription factor p53, apoptotic factor caspase 3, and glycogen synthetase kinase 3β. Thiamine also affects HIV through non-genomic factors, i.e., matrix metalloproteinase, vascular endothelial growth factor, heme oxygenase 1, the prostaglandins, cyclooxygenase 2, reactive oxygen species, and nitric oxide. In conclusion, thiamine may benefit HIV patients, but further investigation of the role of thiamine in HIV infection is needed.
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