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Selvam D, D'silva A, Panchapakesan A, Gohil Y, Singh J, Hanna LE, Ranga U. The expression of HIV-1 tat in Lactococcus lactis. Protein Expr Purif 2024; 217:106443. [PMID: 38360084 DOI: 10.1016/j.pep.2024.106443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/17/2024]
Abstract
Efficient expression of functional proteins in heterologous hosts has become the pivotal focus of modern biotechnology and biomedical research. To this end, multiple alternatives to E. coli are being explored for recombinant protein expression. L. lactis, being a gram-positive organism, circumvents the need for an endotoxin removal step during protein purification. We report here the optimisation of the expression of HIV-1 Tat, a notoriously difficult protein, in Lactococcus lactis system. We evaluated five different promoters in two different Lactococcus lactis strains and examined the effect of pH, glucose, and induction time on the yield and purity of Tat. Finally, the recombinant Tat was functionally competent in transactivating the HIV-1 promoter in HLM-1 reporter cells. Our work provides a scaffold for future work on the expression of toxic proteins in Lactococcus lactis.
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Affiliation(s)
- Deepak Selvam
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India; National Institute for Research in Tuberculosis, Chennai, India
| | - Anish D'silva
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Arun Panchapakesan
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Yuvrajsinh Gohil
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Jayendra Singh
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | | | - Udaykumar Ranga
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India.
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2
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Shmakova A, Hugot C, Kozhevnikova Y, Schwager Karpukhina A, Tsimailo I, Gérard L, Boutboul D, Oksenhendler E, Szewczyk-Roszczenko O, Roszczenko P, Buzun K, Sheval EV, Germini D, Vassetzky Y. Chronic HIV-1 Tat action induces HLA-DR downregulation in B cells: A mechanism for lymphoma immune escape in people living with HIV. J Med Virol 2024; 96:e29423. [PMID: 38285479 DOI: 10.1002/jmv.29423] [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: 09/25/2023] [Revised: 01/03/2024] [Accepted: 01/11/2024] [Indexed: 01/30/2024]
Abstract
Despite the success of combination antiretroviral therapy, people living with human immunodeficiency virus (HIV) still have an increased risk of Epstein-Barr virus (EBV)-associated B cell malignancies. In the HIV setting, B cell physiology is altered by coexistence with HIV-infected cells and the chronic action of secreted viral proteins, for example, HIV-1 Tat that, once released, efficiently penetrates noninfected cells. We modeled the chronic action of HIV-1 Tat on B cells by ectopically expressing Tat or TatC22G mutant in two lymphoblastoid B cell lines. The RNA-sequencing analysis revealed that Tat deregulated the expression of hundreds of genes in B cells, including the downregulation of a subset of major histocompatibility complex (MHC) class II-related genes. Tat-induced downregulation of HLA-DRB1 and HLA-DRB5 genes led to a decrease in HLA-DR surface expression; this effect was reproduced by coculturing B cells with Tat-expressing T cells. Chronic Tat presence decreased the NF-ᴋB pathway activity in B cells; this downregulated NF-ᴋB-dependent transcriptional targets, including MHC class II genes. Notably, HLA-DRB1 and surface HLA-DR expression was also decreased in B cells from people with HIV. Tat-induced HLA-DR downregulation in B cells impaired EBV-specific CD4+ T cell response, which contributed to the escape from immune surveillance and could eventually promote B cell lymphomagenesis in people with HIV.
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Affiliation(s)
- Anna Shmakova
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
- Koltzov Institute of Developmental Biology, Moscow, Russia
| | - Coline Hugot
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
| | - Yana Kozhevnikova
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
| | - Anna Schwager Karpukhina
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
- Koltzov Institute of Developmental Biology, Moscow, Russia
| | - Ivan Tsimailo
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
| | - Laurence Gérard
- Service d'Immunopathologie Clinique, Hôpital St Louis, APHP, Paris, France
| | - David Boutboul
- Service d'Immunopathologie Clinique, Hôpital St Louis, APHP, Paris, France
| | - Eric Oksenhendler
- Service d'Immunopathologie Clinique, Hôpital St Louis, APHP, Paris, France
| | - Olga Szewczyk-Roszczenko
- Department of Synthesis and Technology of Drugs, Medical University of Bialystok, Bialystok, Poland
| | - Piotr Roszczenko
- Department of Biotechnology, Medical University of Bialystok, Bialystok, Poland
| | - Kamila Buzun
- Department of Pharmaceutical Sciences, Poznan University of Medical Sciences, Poznan, Poland
| | - Eugene V Sheval
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
- Department of Cell Biology and Histology, Lomonosov Moscow State University, Moscow, Russia
| | - Diego Germini
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
| | - Yegor Vassetzky
- CNRS, UMR 9018, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
- Koltzov Institute of Developmental Biology, Moscow, Russia
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3
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Yang X, Zhang J, Cheng Y, Cui M, Jiang Z, Fan C, Chen J, Qi L, Liu H, Bao D. Tenofovir disoproxil fumarate mediates neuronal injury by inducing neurotoxicity. Eur J Clin Microbiol Infect Dis 2023; 42:1195-1205. [PMID: 37604947 DOI: 10.1007/s10096-023-04654-1] [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: 12/16/2022] [Accepted: 08/07/2023] [Indexed: 08/23/2023]
Abstract
PURPOSE Highly active antiretroviral therapy (HAART) is an accepted treatment option for patients with virus infection. Mounting evidence indicated that persistent HAART treatment is implicated with increased morbidity of HIV-associated neurocognitive disorders (HAND) in patients. Tenofovir disoproxil fumarate (TDF), a novel nucleotide reverse transcriptase inhibitor (NRTI), was used in patients with HIV co-infected with HBV. And it is still a vital first-line antiretroviral compounds in HAART. However, whether persistent treatment with TDF is involved in HAND development remains to be further elucidated. In this study, we aimed to discuss the neurotoxicity of TDF. METHODS We used SH-SY5Y cells and primary neuronal cells to evaluate the neurotoxicity of TDF in vitro. The cytotoxicity of TDF on SH-SY5Y cells and primary neuronal cells was evaluated by the cell viability and LDH levels by MTT assay and LDH kit, respectively. Hoechst 33342 staining, TUNEL assay and flow cytometry were performed to evaluate the cells apoptosis. The intracellular reactive oxygen species (ROS) and malondialdehyde (MDA) production were measured by commercial kits. In addition, the activation level of caspase-3 was evaluated using spectrophotometry and western blotting. RESULTS Our results showed that TDF treatment significantly induced cell viability and induced apoptosis of SH-SY5Y cells and primary neuronal cells. Furthermore, the ROS levels and MDA productions were significantly up-regulated in nerve cells treated with TDF. CONCLUSION: Our findings indicated that TDF may induce neuronal cell apoptosis through increasing the intracellular ROS and the expression level of caspase-3, which may be related to the increasing prevalence of HAND.
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Affiliation(s)
- Xiaotian Yang
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Juanmei Zhang
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
- Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, Zhengzhou, 450001, Henan, China
| | - Yanhong Cheng
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
- Shenzhen Beike Bio-Technology Co., Ltd, Shenzhen, 518000, Guangdong, China
| | - Mengmeng Cui
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Zhixiong Jiang
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Chunhui Fan
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Jiaxing Chen
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Lixia Qi
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China
| | - Hongliang Liu
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China.
- Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, Zhengzhou, 450001, Henan, China.
| | - Dengke Bao
- Laboratory of Cancer Biomarkers and Liquid Biopsy, School of Pharmacy, Henan University, Kaifeng, 475004, Henan, China.
- Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, Zhengzhou, 450001, Henan, China.
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Shoraka S, Samarasinghe AE, Ghaemi A, Mohebbi SR. Host mitochondria: more than an organelle in SARS-CoV-2 infection. Front Cell Infect Microbiol 2023; 13:1228275. [PMID: 37692170 PMCID: PMC10485703 DOI: 10.3389/fcimb.2023.1228275] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/07/2023] [Indexed: 09/12/2023] Open
Abstract
Since December 2019, the world has been facing viral pandemic called COVID-19 (Coronavirus disease 2019) caused by a new beta-coronavirus named severe acute respiratory syndrome coronavirus-2, or SARS-CoV-2. COVID-19 patients may present with a wide range of symptoms, from asymptomatic to requiring intensive care support. The severe form of COVID-19 is often marked by an altered immune response and cytokine storm. Advanced age, age-related and underlying diseases, including metabolic syndromes, appear to contribute to increased COVID-19 severity and mortality suggesting a role for mitochondria in disease pathogenesis. Furthermore, since the immune system is associated with mitochondria and its damage-related molecular patterns (mtDAMPs), the host mitochondrial system may play an important role during viral infections. Viruses have evolved to modulate the immune system and mitochondrial function for survival and proliferation, which in turn could lead to cellular stress and contribute to disease progression. Recent studies have focused on the possible roles of mitochondria in SARS-CoV-2 infection. It has been suggested that mitochondrial hijacking by SARS-CoV-2 could be a key factor in COVID-19 pathogenesis. In this review, we discuss the roles of mitochondria in viral infections including SARS-CoV-2 infection based on past and present knowledge. Paying attention to the role of mitochondria in SARS-CoV-2 infection will help to better understand the pathophysiology of COVID-19 and to achieve effective methods of prevention, diagnosis, and treatment.
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Affiliation(s)
- Shahrzad Shoraka
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Amali E. Samarasinghe
- Division of Pulmonology, Allergy and Immunology, Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States
- Children’s Foundation Research Institute, Memphis, TN, United States
| | - Amir Ghaemi
- Department of Virology, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Reza Mohebbi
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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5
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Mataramvura H, Bunders MJ, Duri K. Human immunodeficiency virus and antiretroviral therapy-mediated immune cell metabolic dysregulation in children born to HIV-infected women: potential clinical implications. Front Immunol 2023; 14:1182217. [PMID: 37350953 PMCID: PMC10282157 DOI: 10.3389/fimmu.2023.1182217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/25/2023] [Indexed: 06/24/2023] Open
Abstract
Commencing lifelong antiretroviral therapy (ART) immediately following HIV diagnosis (Option B+) has dramatically improved the health of HIV-infected women and their children, with the majority being of HIV-exposed children born uninfected (HEU). This success has led to an increasing population of HIV-infected women receiving ART during pregnancy and children exposed to ART in utero. Nonetheless, a small proportion of children are still infected with HIV (HEI) each year. HEI children suffer from reduced immunocompetence and host-defence, due to CD4+ T lymphocyte depletion, but also dysregulation of other immune cells including CD8+ T lymphocytes, natural killer (NK) cells, macrophages including B lymphocytes. Furthermore, although HEU children are uninfected, altered immune responses are observed and associated with increased vulnerability to infections. The mechanisms underlying immune dysregulation in HEU children remain poorly described. Building on early studies, emerging data suggests that HIV/ART exposure early in life affects cell metabolic function of HEU children. Prenatal HIV/ART exposure has been associated with dysregulation of mitochondria, including impaired DNA polymerase activity. Furthermore, dysregulation of oxidative phosphorylation (OXPHOS) causes a decreased generation of adenosine triphosphate (ATP) and increased production of reactive oxygen species (ROS), resulting in oxidative stress. These altered metabolic processes can affect immune cell viability and immune responses. Recent studies have indicated that immune-metabolic dysregulation may contribute to HIV-associated pathogenesis and clinical observations associated with HIV and ART exposure in HEU/HEI children. Given the critical role metabolic processes in immune cell functioning, immune-metabolic dysregulation in HEU and HEI children may have implications in effective host-defence responses against pathogens, as well as efficacy of standard ART regimens and future novel HIV cure approaches in HEI children. At the same time, targeting metabolic pathways of immune cells may provide safer and novel approaches for HIV cure strategies. Here, we review the current literature investigating immune-metabolic dysregulation in paediatric HIV pathogenesis.
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Affiliation(s)
- Hope Mataramvura
- Immunology Unit, University of Zimbabwe Faculty of Medicine and Health Sciences (UZ-FMHS), Harare, Zimbabwe
| | - Madeleine J. Bunders
- III. Medical Department, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
- Department of Virus Immunology, Leibniz Institute of Virology, Hamburg, Germany
| | - Kerina Duri
- Immunology Unit, University of Zimbabwe Faculty of Medicine and Health Sciences (UZ-FMHS), Harare, Zimbabwe
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6
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Kharbanda KK, Chokshi S, Tikhanovich I, Weinman SA, New-Aaron M, Ganesan M, Osna NA. A Pathogenic Role of Non-Parenchymal Liver Cells in Alcohol-Associated Liver Disease of Infectious and Non-Infectious Origin. BIOLOGY 2023; 12:255. [PMID: 36829532 PMCID: PMC9953685 DOI: 10.3390/biology12020255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/30/2023] [Accepted: 02/02/2023] [Indexed: 02/08/2023]
Abstract
Now, much is known regarding the impact of chronic and heavy alcohol consumption on the disruption of physiological liver functions and the induction of structural distortions in the hepatic tissues in alcohol-associated liver disease (ALD). This review deliberates the effects of alcohol on the activity and properties of liver non-parenchymal cells (NPCs), which are either residential or infiltrated into the liver from the general circulation. NPCs play a pivotal role in the regulation of organ inflammation and fibrosis, both in the context of hepatotropic infections and in non-infectious settings. Here, we overview how NPC functions in ALD are regulated by second hits, such as gender and the exposure to bacterial or viral infections. As an example of the virus-mediated trigger of liver injury, we focused on HIV infections potentiated by alcohol exposure, since this combination was only limitedly studied in relation to the role of hepatic stellate cells (HSCs) in the development of liver fibrosis. The review specifically focusses on liver macrophages, HSC, and T-lymphocytes and their regulation of ALD pathogenesis and outcomes. It also illustrates the activation of NPCs by the engulfment of apoptotic bodies, a frequent event observed when hepatocytes are exposed to ethanol metabolites and infections. As an example of such a double-hit-induced apoptotic hepatocyte death, we deliberate on the hepatotoxic accumulation of HIV proteins, which in combination with ethanol metabolites, causes intensive hepatic cell death and pro-fibrotic activation of HSCs engulfing these HIV- and malondialdehyde-expressing apoptotic hepatocytes.
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Affiliation(s)
- Kusum K. Kharbanda
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Shilpa Chokshi
- Institute of Hepatology, Foundation for Liver Research, London SE5 9NT, UK
- Faculty of Life Sciences and Medicine, King’s College London, London SE5 8AF, UK
| | - Irina Tikhanovich
- Department of Internal Medicine, University of Kansas Medical Center, Kansas City, MO 66160, USA
| | - Steven A. Weinman
- Department of Internal Medicine, University of Kansas Medical Center, Kansas City, MO 66160, USA
- Research Service, Kansas City Veterans Administration Medical Center, Kansas City, MO 64128, USA
| | - Moses New-Aaron
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Murali Ganesan
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Natalia A. Osna
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
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7
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Fan J, Lv X, Yang S, Geng S, Yang J, Zhao Y, Zhang Z, Liu Z, Guan G, Luo J, Zeng Q, Yin H, Niu Q. OGG1 inhibition suppresses African swine fever virus replication. Virol Sin 2023; 38:96-107. [PMID: 36435451 PMCID: PMC10006199 DOI: 10.1016/j.virs.2022.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 11/18/2022] [Indexed: 11/26/2022] Open
Abstract
African swine fever virus (ASFV) is an important pathogen that causes a highly contagious and lethal disease in swine, for which neither a vaccine nor treatment is available. The DNA repair enzyme 8-oxoguanine DNA glycosylase 1 (OGG1), which excises the oxidative base lesion 8-oxo-7,8-dihydroguanine (8-oxoG), has been linked to the pathogenesis of different diseases associated with viral infections. However, the role of OGG1-base excision repair (BER) in ASFV infection has been poorly investigated. Our study aimed to characterize the alteration of host reactive oxygen species (ROS) and OGG1 and to analyse the role of OGG1 in ASFV infection. We found that ASFV infection induced high levels and dynamic changes in ROS and 8-oxoG and consistently increased the expression of OGG1. Viral yield, transcription level, and protein synthesis were reduced in ASFV-infected primary alveolar macrophages (PAMs) treated by TH5487 or SU0268 inhibiting OGG1. The expression of BER pathway associated proteins of ASFV was also suppressed in OGG1-inhibited PAMs. Furthermore, OGG1 was found to negatively regulate interferon β (IFN-β) production during ASFV infection and IFN-β could be activated by OGG1 inhibition with TH5487 and SU0268, which blocked OGG1 binding to 8-oxoG. Additionally, the interaction of OGG1 with viral MGF360-14-L protein could disturb IFN-β production to further affect ASFV replication. These results suggest that OGG1 plays the crucial role in successful viral infection and OGG1 inhibitors SU0268 or TH5487 could be used as antiviral agents for ASFV infection.
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Affiliation(s)
- Jie Fan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China; African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Xinqian Lv
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Saixia Yang
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Shuxian Geng
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China; African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Jifei Yang
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Yaru Zhao
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Zhonghui Zhang
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Zhijie Liu
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Guiquan Guan
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Jianxun Luo
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China
| | - Qiaoying Zeng
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China.
| | - Hong Yin
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, 225009, China
| | - Qingli Niu
- African Swine Fever Regional Laboratory of China (Lanzhou), State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China.
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8
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Clinical Investigation of Leukocyte DNA Damage in COVID-19 Patients. Curr Issues Mol Biol 2023; 45:963-974. [PMID: 36826007 PMCID: PMC9955698 DOI: 10.3390/cimb45020062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/11/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023] Open
Abstract
This prospective cross-sectional study aimed to evaluate leukocyte DNA damage in coronavirus disease (COVID-19) patients. In this study, 50 COVID-19-positive patients attending the Erzurum City Hospital Internal Medicine Outpatient Clinic and 42 control group patients were included. DNA damage was detected in living cells through leukocyte isolation in 50 COVID-19-positive patients using the comet assay method. DNA tail/head (olive) moments were evaluated and compared. White blood cells (WBC), red blood cells (RBC), hemoglobin (HGB), neutrophils (NEU), lymphocytes (LYM), eosinophils (EO), monocytes (MONO), basophils (BASO), platelets (PLT), and the neutrophil/lymphocyte ratio (NLR) were analyzed. The RBC, lymphocyte, eosinophil, and monocyte means were significantly higher in the control group (p < 0.05), whereas the HGB and neutrophile means were significantly higher in the study group (p < 0.05). There were significant negative correlations between COVID-19 and RBC (r = -0.863), LYM (r = -0.542), EO (r = -0.686), and MONO (r = -0.385). Meanwhile, there were significant positive correlations between COVID-19 and HGB (r = 0.863), NEU (r = 0.307), tail moment (r = 0.598), and olive moment (r = 0.582). Both the tail and olive moment mean differences were significantly higher in the study group, with higher ranges (p < 0.05). COVID-19 infection caused statistically significant increases in both the tail and olive damage percentage in patients, causing DNA damage. Lastly, the NLR rate was associated with the presence and progression of COVID-19.
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9
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Xue Y, Gan B, Zhou Y, Wang T, Zhu T, Peng X, Zhang X, Zhou Y. Advances in the Mechanistic Study of the Control of Oxidative Stress Injury by Modulating HDAC6 Activity. Cell Biochem Biophys 2023; 81:127-139. [PMID: 36749475 PMCID: PMC9925596 DOI: 10.1007/s12013-022-01125-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/14/2022] [Indexed: 02/08/2023]
Abstract
Oxidative stress is defined as an injury resulting from a disturbance in the dynamic equilibrium of the redox environment due to the overproduction of active/radical oxygen exceeding the antioxidative ability of the body. This is a key step in the development of various diseases. Oxidative stress is modulated by different factors and events, including the modification of histones, which are the cores of nucleosomes. Histone modification includes acetylation and deacetylation of certain amino acid residues; this process is catalyzed by different enzymes. Histone deacetylase 6 (HDAC6) is a unique deacetylating protease that also catalyzes the deacetylation of different nonhistone substrates to regulate various physiologic processes. The intimate relationship between HDAC6 and oxidative stress has been demonstrated by different studies. The present paper aims to summarize the data obtained from a mechanistic study of HDAC6 and oxidative stress to guide further investigations on mechanistic characterization and drug development.
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Affiliation(s)
- Yuanye Xue
- grid.410560.60000 0004 1760 3078Department of Pathophysiology, Guangdong Medical University, Dongguan, 523808 China
| | - Bing Gan
- grid.410560.60000 0004 1760 3078The Third Affiliated Hospital of Guangdong Medical University, Fo Shan, 528000 Guangdong China
| | - Yanxing Zhou
- grid.410560.60000 0004 1760 3078School of Medical Technology, Guangdong Medical University, Dongguan, 523808 China
| | - Tingyu Wang
- grid.410560.60000 0004 1760 3078Department of Pathophysiology, Guangdong Medical University, Dongguan, 523808 China
| | - Tong Zhu
- grid.410560.60000 0004 1760 3078Department of Pathophysiology, Guangdong Medical University, Dongguan, 523808 China
| | - Xinsheng Peng
- Biomedical Innovation Center, Guangdong Medical University, Dongguan, 523808, China. .,Institute of Marine Medicine, Guangdong Medical University, Zhanjiang, 524023, China.
| | - Xiangning Zhang
- Department of Pathophysiology, Guangdong Medical University, Dongguan, 523808, China.
| | - Yanfang Zhou
- Department of Pathophysiology, Guangdong Medical University, Dongguan, 523808, China.
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10
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Valyaeva AA, Tikhomirova MA, Potashnikova DM, Bogomazova AN, Snigiryova GP, Penin AA, Logacheva MD, Arifulin EA, Shmakova AA, Germini D, Kachalova AI, Saidova AA, Zharikova AA, Musinova YR, Mironov AA, Vassetzky YS, Sheval EV. Ectopic expression of HIV-1 Tat modifies gene expression in cultured B cells: implications for the development of B-cell lymphomas in HIV-1-infected patients. PeerJ 2022; 10:e13986. [PMID: 36275462 PMCID: PMC9586123 DOI: 10.7717/peerj.13986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/11/2022] [Indexed: 01/19/2023] Open
Abstract
An increased frequency of B-cell lymphomas is observed in human immunodeficiency virus-1 (HIV-1)-infected patients, although HIV-1 does not infect B cells. Development of B-cell lymphomas may be potentially due to the action of the HIV-1 Tat protein, which is actively released from HIV-1-infected cells, on uninfected B cells. The exact mechanism of Tat-induced B-cell lymphomagenesis has not yet been precisely identified. Here, we ectopically expressed either Tat or its TatC22G mutant devoid of transactivation activity in the RPMI 8866 lymphoblastoid B cell line and performed a genome-wide analysis of host gene expression. Stable expression of both Tat and TatC22G led to substantial modifications of the host transcriptome, including pronounced changes in antiviral response and cell cycle pathways. We did not find any strong action of Tat on cell proliferation, but during prolonged culturing, Tat-expressing cells were displaced by non-expressing cells, indicating that Tat expression slightly inhibited cell growth. We also found an increased frequency of chromosome aberrations in cells expressing Tat. Thus, Tat can modify gene expression in cultured B cells, leading to subtle modifications in cellular growth and chromosome instability, which could promote lymphomagenesis over time.
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Affiliation(s)
- Anna A. Valyaeva
- School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia,Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia,Department of Cell Biology and Histology, School of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Maria A. Tikhomirova
- School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia,Koltzov Institute of Developmental Biology, Moscow, Russia
| | - Daria M. Potashnikova
- Department of Cell Biology and Histology, School of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Alexandra N. Bogomazova
- Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russia,Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
| | | | | | - Maria D. Logacheva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia,Skolkovo Institute of Science and Technology, Moscow, Russia
| | - Eugene A. Arifulin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Anna A. Shmakova
- Koltzov Institute of Developmental Biology, Moscow, Russia,UMR9018 (CNRS – Institut Gustave Roussy – Université Paris Saclay), Centre National de Recherche Scientifique, Villejuif, France, France
| | - Diego Germini
- UMR9018 (CNRS – Institut Gustave Roussy – Université Paris Saclay), Centre National de Recherche Scientifique, Villejuif, France, France
| | - Anastasia I. Kachalova
- Department of Cell Biology and Histology, School of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Aleena A. Saidova
- Department of Cell Biology and Histology, School of Biology, Lomonosov Moscow State University, Moscow, Russia,Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Moscow, Russia
| | - Anastasia A. Zharikova
- School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia,Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yana R. Musinova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia,Koltzov Institute of Developmental Biology, Moscow, Russia
| | - Andrey A. Mironov
- School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia,Institute for Information Transmission Problems, Moscow, Russia
| | - Yegor S. Vassetzky
- Koltzov Institute of Developmental Biology, Moscow, Russia,UMR9018 (CNRS – Institut Gustave Roussy – Université Paris Saclay), Centre National de Recherche Scientifique, Villejuif, France, France
| | - Eugene V. Sheval
- School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia,Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia,Department of Cell Biology and Histology, School of Biology, Lomonosov Moscow State University, Moscow, Russia
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11
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Halcrow PW, Kumar N, Quansah DNK, Baral A, Liang B, Geiger JD. Endolysosome Iron Chelation Inhibits HIV-1 Protein-Induced Endolysosome De-Acidification-Induced Increases in Mitochondrial Fragmentation, Mitophagy, and Cell Death. Cells 2022; 11:1811. [PMID: 35681506 PMCID: PMC9180803 DOI: 10.3390/cells11111811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/19/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
People with human immunodeficiency virus-1 (PLWH) experience high rates of HIV-1-associated neurocognitive disorders (HANDs); clinical symptoms range from being asymptomatic to experiencing HIV-associated dementia. Antiretroviral therapies have effectively prolonged the life expectancy related to PLWH; however, the prevalence of HANDs has increased. Implicated in the pathogenesis of HANDs are two HIV-1 proteins, transactivator of transcription (Tat) and gp120; both are neurotoxic and damage mitochondria. The thread-like morphological features of functional mitochondria become fragmented when levels of reactive oxygen species (ROS) increase, and ROS can be generated via Fenton-like chemistry in the presence of ferrous iron (Fe2+). Endolysosomes are central to iron trafficking in cells and contain readily releasable Fe2+ stores. However, it is unclear whether the endolysosome store is sufficient to account for insult-induced increases in levels of ROS, mitochondrial fragmentation, autophagy, and cell death. Using U87MG astrocytoma and SH-SY5Y neuroblastoma cells, we determined that chloroquine (CQ), Tat, and gp120 all (1) de-acidified endolysosomes, (2) decreased endolysosome numbers and increased endolysosome sizes, (3) increased mitochondrial numbers (fragmentation), (4) increased autophagosome numbers, (5) increased autolysosome numbers, (6) increased mitochondrial fragments within endolysosomes, and (7) increased cell death. These effects were all blocked by the endolysosome-specific iron chelator deferoxamine (DFO). Thus, the endolysosome de-acidification-induced release of endolysosome Fe2+ is sufficient to account for inter-organellar signaling events and cell biology consequences of HIV-1 proteins, including mitochondrial fragmentation, autophagy, and cell death.
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Affiliation(s)
| | | | | | | | | | - Jonathan D. Geiger
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Room 110, Grand Forks, ND 58203, USA; (P.W.H.); (N.K.); (D.N.K.Q.); (A.B.); (B.L.)
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12
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Jiménez-Osorio AS, Jaen-Vega S, Fernández-Martínez E, Ortíz-Rodríguez MA, Martínez-Salazar MF, Jiménez-Sánchez RC, Flores-Chávez OR, Ramírez-Moreno E, Arias-Rico J, Arteaga-García F, Estrada-Luna D. Antiretroviral Therapy-Induced Dysregulation of Gene Expression and Lipid Metabolism in HIV+ Patients: Beneficial Role of Antioxidant Phytochemicals. Int J Mol Sci 2022; 23:5592. [PMID: 35628408 PMCID: PMC9146859 DOI: 10.3390/ijms23105592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 12/02/2022] Open
Abstract
Human immunodeficiency virus (HIV) infection has continued to be the subject of study since its discovery nearly 40 years ago. Significant advances in research and intake of antiretroviral therapy (ART) have slowed the progression and appearance of the disease symptoms and the incidence of concomitant diseases, which are the leading cause of death in HIV+ persons. However, the prolongation of ART is closely related to chronic degenerative diseases and pathologies caused by oxidative stress (OS) and alterations in lipid metabolism (increased cholesterol levels), both of which are conditions of ART. Therefore, recent research focuses on using natural therapies to diminish the effects of ART and HIV infection: regulating lipid metabolism and reducing OS status. The present review summarizes current information on OS and cholesterol metabolism in HIV+ persons and how the consumption of certain phytochemicals can modulate these. For this purpose, MEDLINE and SCOPUS databases were consulted to identify publications investigating HIV disease and natural therapies and their associated effects.
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Affiliation(s)
- Angélica Saraí Jiménez-Osorio
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
| | - Sinaí Jaen-Vega
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
| | - Eduardo Fernández-Martínez
- Laboratorio de Química Medicinal y Farmacología, Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Calle Dr. Eliseo Ramírez Ulloa no. 400, Col. Doctores, Pachuca Hidalgo 42090, Mexico;
| | - María Araceli Ortíz-Rodríguez
- Facultad de Nutrición, Universidad Autónoma del Estado de Morelos, Iztaccíhuatl 100 Col. Los Volcanes, Cuernavaca 62350, Mexico;
| | - María Fernanda Martínez-Salazar
- Facultad de Ciencias del Deporte, Facultad de Farmacia Universidad Autónoma del Estado de Morelos, Av. Universidad No. 1001 Col. Chamilpa, Cuernavaca 62209, Mexico;
| | - Reyna Cristina Jiménez-Sánchez
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
| | - Olga Rocío Flores-Chávez
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
| | - Esther Ramírez-Moreno
- Área Académica de Nutrición, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico;
| | - José Arias-Rico
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
| | - Felipe Arteaga-García
- Coordinación de Enseñanza e Investigación, Hospital del Niño DIF Hidalgo, Carretera México-Pachuca km 82, Pachuca de Soto 42080, Mexico;
| | - Diego Estrada-Luna
- Área Académica de Enfermería, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado Hidalgo, Circuito Ex Hacienda La Concepción S/N, Carretera Pachuca-Actopan, San Agustín Tlaxiaca 42160, Mexico; (A.S.J.-O.); (S.J.-V.); (R.C.J.-S.); (O.R.F.-C.); (J.A.-R.)
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13
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Liu N, Shi F, Yang L, Liao W, Cao Y. Oncogenic viral infection and amino acid metabolism in cancer progression: Molecular insights and clinical implications. Biochim Biophys Acta Rev Cancer 2022; 1877:188724. [DOI: 10.1016/j.bbcan.2022.188724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 03/15/2022] [Accepted: 03/15/2022] [Indexed: 02/08/2023]
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14
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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: 3.0] [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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15
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Liu A, Wei Q, Lin H, Ding Y, Sun YV, Zhao D, He J, Ma Z, Li F, Zhou S, Chen X, Shen W, Gao M, He N. Baseline Characteristics of Mitochondrial DNA and Mutations Associated With Short-Term Posttreatment CD4+T-Cell Recovery in Chinese People With HIV. Front Immunol 2022; 12:793375. [PMID: 34970271 PMCID: PMC8712318 DOI: 10.3389/fimmu.2021.793375] [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: 10/12/2021] [Accepted: 11/16/2021] [Indexed: 11/25/2022] Open
Abstract
Background Mitochondrial DNA (mtDNA) profiles and contributions of mtDNA variants to CD4+T-cell recovery in Euramerican people living with HIV (PLWH) may not be transferred to East-Asian PLWH, highlighting the need to consider more regional studies. We aimed to identify mtDNA characteristics and mutations that explain the variability of short-term CD4+T-cell recovery in East-Asian PLWH. Method Eight hundred fifty-six newly reported antiretroviral therapy (ART)-naïve Chinese PLWH from the Comparative HIV and Aging Research in Taizhou (CHART) cohort (Zhejiang Province, Eastern China) were enrolled. MtDNA was extracted from peripheral whole blood of those PLWH at HIV diagnosis, amplified, and sequenced using polymerase chain reaction and gene array. Characterization metrics such as mutational diversity and momentum were developed to delineate baseline mtDNA mutational patterns in ART-naïve PLWH. The associations between mtDNA genome-wide single nucleotide variants and CD4+T-cell recovery after short-term (within ~48 weeks) ART in 724 PLWH were examined using bootstrapping median regressions. Results Of 856 participants, 74.18% and 25.82% were male and female, respectively. The median age was 37 years; 94.51% were of the major Han ethnicity, and 69.04% and 28.62% were of the heterosexual and homosexual transmission, respectively. We identified 2,352 types of mtDNA mutations and mtDNA regions D-loop, ND5, CYB, or RNR1 with highest mutational diversity or volume. Female PLWH rather than male PLWH at the baseline showed remarkable age-related uptrends of momentum and mutational diversity as well as correlations between CD4+T <200 (cells/μl) and age-related uptrends of mutational diversity in many mtDNA regions. After adjustments of important sociodemographic and clinical variables, m.1005T>C, m.1824T>C, m.3394T>C, m.4491G>A, m.7828A>G, m.9814T>C, m.10586G>A, m.12338T>C, m.13708G>A, and m.14308T>C (at the Bonferroni-corrected significance) were negatively associated with short-term CD4+T-cell recovery whereas m.93A>G, m.15218A>G, and m.16399A>G were positively associated with short-term CD4+T-cell recovery. Conclusion Our baseline mtDNA characterization stresses the attention to East-Asian female PLWH at risk of CD4+T-cell loss-related aging and noncommunicable chronic diseases. Furthermore, mtDNA variants identified in regression analyses account for heterogeneity in short-term CD4+T-cell recovery of East-Asian PLWH. These results may help individualize the East-Asian immune recovery strategies under complicated HIV management caused by CD4+T-cell loss.
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Affiliation(s)
- Anni Liu
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China.,Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY, United States
| | - Qian Wei
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Haijiang Lin
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China.,Department of AIDS/STD Control and Prevention, Taizhou City Center for Disease Control and Prevention, Taizhou, China
| | - Yingying Ding
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Yan V Sun
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, United States.,Department of Biomedical Informatics, School of Medicine, Emory University, Atlanta, GA, United States
| | - Dan Zhao
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Jiayu He
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Zhonghui Ma
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Feihu Li
- School of Mathematical Sciences, Fudan University, Shanghai, China
| | - Sujuan Zhou
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Xiaoxiao Chen
- Department of AIDS/STD Control and Prevention, Taizhou City Center for Disease Control and Prevention, Taizhou, China
| | - Weiwei Shen
- Department of AIDS/STD Control and Prevention, Taizhou City Center for Disease Control and Prevention, Taizhou, China
| | - Meiyang Gao
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Na He
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.,Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China.,Key Laboratory of Health Technology Assessment, National Commission of Health, Fudan University, Shanghai, China
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16
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Petitdemange C, Funderburg N, Zaunders J, Corbeau P. Editorial: Infectious Agent-Induced Chronic Immune Activation: Causes, Phenotypes, and Consequences. Front Immunol 2021; 12:740556. [PMID: 34956176 PMCID: PMC8702517 DOI: 10.3389/fimmu.2021.740556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/22/2021] [Indexed: 11/17/2022] Open
Affiliation(s)
| | - Nicholas Funderburg
- School of Health and Rehabilitation Sciences, Ohio State University, Columbus, OH, United States
| | - John Zaunders
- St Vincent’s Centre for Applied Medical Research, St Vincent’s Hospital, Sydney, NSW, Australia
| | - Pierre Corbeau
- CHU de Nîmes, Institut de Génétique Humaine CNRS-Université de Montpellier, UMR9002, Montpellier, France
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17
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Wang XH, Song TZ, Zheng HY, Li YH, Zheng YT. Jejunal epithelial barrier disruption triggered by reactive oxygen species in early SIV infected rhesus macaques. Free Radic Biol Med 2021; 177:143-155. [PMID: 34687865 DOI: 10.1016/j.freeradbiomed.2021.10.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 10/07/2021] [Accepted: 10/16/2021] [Indexed: 01/03/2023]
Abstract
Intestinal epithelial barrier destruction occurs earlier than mucosal immune dysfunction in the acute stage of human immunodeficiency virus (HIV) and simian immunodeficiency virus (SIV) infections. At present, however, the cause of compromised gastrointestinal integrity in early SIV infection remains unknown. In the current study, we investigated the effects of SIV infection on epithelial barrier integrity and explored oxidative stress-mediated DNA damage and apoptosis in epithelial cells from early acute SIVmac239-infected Chinese rhesus macaques (Macaca mulatta). Results showed that the sensitive molecular marker of small intestinal barrier dysfunction, i.e., intestinal fatty acid-binding protein (IFABP), was significantly increased in plasma at 14 days post-SIV infection. SIV infection induced a profound decrease in the expression of tight junction proteins, including claudin-1, claudin-3, and zonula occludens (ZO)-1, as well as a significant increase in the active form of caspase-3 level in epithelial cells. RNA sequencing (RNA-seq) analysis suggested that differentially expressed genes between pre- and post-SIV-infected jejuna were enriched in pathways involved in cell redox homeostasis, oxidoreductase activity, and mitochondria. Indeed, a SIV-mediated increase in reactive oxygen species (ROS) in the epithelium and macrophages, as well as an increase in hydrogen peroxide (H2O2) and decrease in glutathione (GSH)/glutathione disulfide (GSSG) antioxidant defense, were observed in SIV-infected jejuna. In addition, the accumulation of mitochondrial dysfunction and DNA oxidative damage led to an increase in senescence-associated β-galactosidase (SA-β-gal) and early apoptosis in intestinal epithelial cells. Furthermore, HIV-1 Tat protein-induced epithelial monolayer disruption in HT-29 cells was rescued by antioxidant N-acetylcysteine (NAC). These results indicate that mitochondrial dysfunction and oxidative stress in jejunal epithelial cells are primary contributors to gut epithelial barrier disruption in early SIV-infected rhesus macaques.
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Affiliation(s)
- Xue-Hui Wang
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, National Kunming High Level Biosafety Research Center for Nonhuman Primate, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China
| | - Tian-Zhang Song
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, National Kunming High Level Biosafety Research Center for Nonhuman Primate, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China
| | - Hong-Yi Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, National Kunming High Level Biosafety Research Center for Nonhuman Primate, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China
| | - Yi-Hui Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, National Kunming High Level Biosafety Research Center for Nonhuman Primate, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, 650204, China
| | - Yong-Tang Zheng
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, National Kunming High Level Biosafety Research Center for Nonhuman Primate, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, 650204, China.
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18
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Chronic Exposure to HIV-Derived Protein Tat Impairs Endothelial Function via Indirect Alteration in Fat Mass and Nox1-Mediated Mechanisms in Mice. Int J Mol Sci 2021; 22:ijms222010977. [PMID: 34681637 PMCID: PMC8540571 DOI: 10.3390/ijms222010977] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/03/2021] [Accepted: 10/07/2021] [Indexed: 12/15/2022] Open
Abstract
People living with human immunodeficiency virus (HIV) (PLWH) have increased risk for atherosclerosis-related cardiovascular disease (CVD), the main cause of death in this population. Notwithstanding, the mechanisms of HIV-associated vascular pathogenesis are not fully elucidated. Therefore, we sought to determine whether HIV-regulatory protein Tat mediates HIV-induced endothelial dysfunction via NADPH oxidase 1 (Nox1)-dependent mechanisms. Body weight, fat mass, leptin levels, expression of reactive oxygen species (ROS)-producing enzymes and vascular function were assessed in C57BL/6 male mice treated with Tat for 3 days and 4 weeks. Aortic rings and human endothelial cells were also treated with Tat for 2–24 h in ex vivo and in vitro settings. Chronic (4 weeks) but not acute (3 days and 2–24 h) treatment with Tat decreased body weight, fat mass, and leptin levels and increased the expression of Nox1 and its coactivator NADPH oxidase Activator 1 (NoxA1). This was associated with impaired endothelium-dependent vasorelaxation. Importantly, specific inhibition of Nox1 with GKT771 and chronic leptin infusion restored endothelial function in Tat-treated mice. These data rule out direct effects of HIV-Tat on endothelial function and imply the contribution of reductions in adipose mass and leptin production which likely explain upregulated expression of Nox1 and NoxA1. The Nox1 and leptin system may provide potential targets to improve vascular function in HIV infection-associated CVD.
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Khan N, Halcrow PW, Lakpa LK, Rehan M, Chen X, Geiger JD. Endolysosome iron restricts Tat-mediated HIV-1 LTR transactivation by increasing HIV-1 Tat oligomerization and β-catenin expression. J Neurovirol 2021; 27:755-773. [PMID: 34550543 DOI: 10.1007/s13365-021-01016-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 08/06/2021] [Accepted: 08/24/2021] [Indexed: 12/31/2022]
Abstract
HIV-1 transactivator of transcription (Tat) protein is required for HIV-1 replication, and it has been implicated in the pathogenesis of HIV-1-associated neurocognitive disorder (HAND). HIV-1 Tat can enter cells via receptor-mediated endocytosis where it can reside in endolysosomes; upon its escape from these acidic organelles, HIV-1 Tat can enter the cytosol and nucleus where it activates the HIV-1 LTR promoter. Although it is known that HIV-1 replication is affected by the iron status of people living with HIV-1 (PLWH), very little is known about how iron affects HIV-1 Tat activation of the HIV-1 LTR promoter. Because HIV-1 proteins de-acidify endolysosomes and endolysosome de-acidification affects subcellular levels and actions of iron, we tested the hypothesis that the endolysosome pool of iron is sufficient to affect Tat-induced HIV-1 LTR transactivation. Ferric (Fe3+) and ferrous (Fe2+) iron both restricted Tat-mediated HIV-1 LTR transactivation. Chelation of endolysosome iron with deferoxamine (DFO) and 2-2 bipyridyl, but not chelation of cytosolic iron with deferiprone and deferasirox, significantly enhanced Tat-mediated HIV-1 LTR transactivation. In the presence of iron, HIV-1 Tat increasingly oligomerized and DFO prevented the oligomerization. DFO also reduced protein expression levels of the HIV-1 restriction agent beta-catenin in the cytosol and nucleus. These findings suggest that DFO increases HIV-1 LTR transactivation by increasing levels of the more active dimeric form of Tat relative to the less active oligomerized form of Tat, increasing the escape of dimeric Tat from endolysosomes, and/or reducing beta-catenin protein expression levels. Thus, intracellular iron might play a significant role in regulating HIV-1 replication, and these findings raise cautionary notes for chelation therapies in PLWH.
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Affiliation(s)
- Nabab Khan
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Peter W Halcrow
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Leo K Lakpa
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Mohd Rehan
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Xuesong Chen
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA
| | - Jonathan D Geiger
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58203, USA.
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20
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Ensoli B, Moretti S, Borsetti A, Maggiorella MT, Buttò S, Picconi O, Tripiciano A, Sgadari C, Monini P, Cafaro A. New insights into pathogenesis point to HIV-1 Tat as a key vaccine target. Arch Virol 2021; 166:2955-2974. [PMID: 34390393 PMCID: PMC8363864 DOI: 10.1007/s00705-021-05158-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/09/2021] [Indexed: 02/07/2023]
Abstract
Despite over 30 years of enormous effort and progress in the field, no preventative and/or therapeutic vaccines against human immunodeficiency virus (HIV) are available. Here, we briefly summarize the vaccine strategies and vaccine candidates that in recent years advanced to efficacy trials with mostly unsatisfactory results. Next, we discuss a novel and somewhat contrarian approach based on biological and epidemiological evidence, which led us to choose the HIV protein Tat for the development of preventive and therapeutic HIV vaccines. Toward this goal, we review here the role of Tat in the virus life cycle as well as experimental and epidemiological evidence supporting its key role in the natural history of HIV infection and comorbidities. We then discuss the preclinical and clinical development of a Tat therapeutic vaccine, which, by improving the functionality and homeostasis of the immune system and by reducing the viral reservoir in virologically suppressed vaccinees, helps to establish key determinants for intensification of combination antiretroviral therapy (cART) and a functional cure. Future developments and potential applications of the Tat therapeutic vaccine are also discussed, as well as the rationale for its use in preventative strategies. We hope this contribution will lead to a reconsideration of the current paradigms for the development of HIV/AIDS vaccines, with a focus on targeting of viral proteins with key roles in HIV pathogenesis.
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Affiliation(s)
- Barbara Ensoli
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy.
| | - Sonia Moretti
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Alessandra Borsetti
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Maria Teresa Maggiorella
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Stefano Buttò
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Orietta Picconi
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Antonella Tripiciano
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Cecilia Sgadari
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Paolo Monini
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Aurelio Cafaro
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
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21
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Shytaj IL, Procopio FA, Tarek M, Carlon‐Andres I, Tang H, Goldman AR, Munshi M, Kumar Pal V, Forcato M, Sreeram S, Leskov K, Ye F, Lucic B, Cruz N, Ndhlovu LC, Bicciato S, Padilla‐Parra S, Diaz RS, Singh A, Lusic M, Karn J, Alvarez‐Carbonell D, Savarino A. Glycolysis downregulation is a hallmark of HIV-1 latency and sensitizes infected cells to oxidative stress. EMBO Mol Med 2021; 13:e13901. [PMID: 34289240 PMCID: PMC8350904 DOI: 10.15252/emmm.202013901] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 12/12/2022] Open
Abstract
HIV-1 infects lymphoid and myeloid cells, which can harbor a latent proviral reservoir responsible for maintaining lifelong infection. Glycolytic metabolism has been identified as a determinant of susceptibility to HIV-1 infection, but its role in the development and maintenance of HIV-1 latency has not been elucidated. By combining transcriptomic, proteomic, and metabolomic analyses, we here show that transition to latent HIV-1 infection downregulates glycolysis, while viral reactivation by conventional stimuli reverts this effect. Decreased glycolytic output in latently infected cells is associated with downregulation of NAD+ /NADH. Consequently, infected cells rely on the parallel pentose phosphate pathway and its main product, NADPH, fueling antioxidant pathways maintaining HIV-1 latency. Of note, blocking NADPH downstream effectors, thioredoxin and glutathione, favors HIV-1 reactivation from latency in lymphoid and myeloid cellular models. This provides a "shock and kill effect" decreasing proviral DNA in cells from people living with HIV/AIDS. Overall, our data show that downmodulation of glycolysis is a metabolic signature of HIV-1 latency that can be exploited to target latently infected cells with eradication strategies.
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Affiliation(s)
- Iart Luca Shytaj
- Department of Infectious DiseasesItalian Institute of HealthRomeItaly
- Department of Infectious DiseasesHeidelberg University HospitalHeidelbergGermany
- Infectious Diseases DepartmentFederal University of São PauloSão PauloBrazil
| | - Francesco Andrea Procopio
- Service of Immunology and AllergyLausanne University HospitalUniversity of LausanneLausanneSwitzerland
| | - Mohammad Tarek
- Bioinformatics DepartmentArmed Forces College of Medicine (AFCM)CairoEgypt
| | - Irene Carlon‐Andres
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
- Department of Infectious DiseasesFaculty of Life Sciences & MedicineKing’s College LondonLondonUK
- Randall Division of Cell and Molecular BiophysicsKing’s College LondonLondonUK
| | | | | | | | | | - Mattia Forcato
- Department of Life SciencesUniversity of Modena and Reggio EmiliaModenaItaly
| | - Sheetal Sreeram
- Department of Molecular Biology and MicrobiologyCase Western Reserve UniversityClevelandOHUSA
| | - Konstantin Leskov
- Department of Molecular Biology and MicrobiologyCase Western Reserve UniversityClevelandOHUSA
| | - Fengchun Ye
- Department of Molecular Biology and MicrobiologyCase Western Reserve UniversityClevelandOHUSA
| | - Bojana Lucic
- Department of Infectious DiseasesHeidelberg University HospitalHeidelbergGermany
- German Center for Infection ResearchHeidelbergGermany
| | - Nicolly Cruz
- Infectious Diseases DepartmentFederal University of São PauloSão PauloBrazil
| | - Lishomwa C Ndhlovu
- Division of Infectious DiseasesDepartment of MedicineWeill Cornell MedicineNew YorkNYUSA
| | - Silvio Bicciato
- Department of Life SciencesUniversity of Modena and Reggio EmiliaModenaItaly
| | - Sergi Padilla‐Parra
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
- Department of Infectious DiseasesFaculty of Life Sciences & MedicineKing’s College LondonLondonUK
- Randall Division of Cell and Molecular BiophysicsKing’s College LondonLondonUK
| | - Ricardo Sobhie Diaz
- Infectious Diseases DepartmentFederal University of São PauloSão PauloBrazil
| | - Amit Singh
- Indian Institute of ScienceBangaloreIndia
| | - Marina Lusic
- Department of Infectious DiseasesHeidelberg University HospitalHeidelbergGermany
- German Center for Infection ResearchHeidelbergGermany
| | - Jonathan Karn
- Department of Molecular Biology and MicrobiologyCase Western Reserve UniversityClevelandOHUSA
| | - David Alvarez‐Carbonell
- Department of Molecular Biology and MicrobiologyCase Western Reserve UniversityClevelandOHUSA
| | - Andrea Savarino
- Department of Infectious DiseasesItalian Institute of HealthRomeItaly
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Ali A, Mishra R, Kaur H, Chandra Banerjea A. HIV-1 Tat: An update on transcriptional and non-transcriptional functions. Biochimie 2021; 190:24-35. [PMID: 34242726 DOI: 10.1016/j.biochi.2021.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 06/24/2021] [Accepted: 07/01/2021] [Indexed: 01/05/2023]
Abstract
Over the past decades, much have been learned about HIV-1 virus and its molecular strategies for pathogenesis. However, HIV-1 still remains an enigmatic virus, particularly because of its unique proteins. Establishment of latency and reactivation is still a puzzling question and various temporal and spatial dynamics between HIV-1 proteins itself have given us new way of thinking about its pathogenesis. HIV-1 replication depends on Tat which is a small unstructured protein and subjected to various post-translational modifications for its myriad of functions. HIV-1 Tat protein modulates the functions of various strategic cellular pathways like proteasomal machinery and inflammatory pathways to aid in HIV-1 pathogenesis. Many of the recent findings have shown that Tat is associated with exosomes, cleared from HIV-1 infected cells through its degradation by diverse routes ranging from lysosomal to proteasomal pathways. HIV-1 Tat was also found to be associated with other HIV-1 proteins including Vpr, Nef, Nucleocapsid (NC) and Rev. Interaction of Tat with Vpr and Nef increases its transactivation function, whereas, interaction of Tat with NC or Rev leads to Tat protein degradation and hence suppression of Tat functions. Research in the recent years has established that Tat is not only important for HIV-1 promoter transactivation and virus replication but also modulating multiple cellular and molecular functions leading to HIV-1 pathogenicity. In this review we discussed various transcriptional and non-transcriptional HIV-1 Tat functions which modulate host cell metabolism during HIV-1 pathogenesis.
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Affiliation(s)
- Amjad Ali
- Virology Lab, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India; Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, 01605, USA.
| | - Ritu Mishra
- Virology Lab, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Harsimrut Kaur
- Department of Chemistry and Biochemistry, School of Basic Sciences and Research, Sharda University, Knowledge Park III, Greater Noida, Uttar Pradesh, 201310, India.
| | - Akhil Chandra Banerjea
- Virology Lab, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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23
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Alves de Souza Rios L, Mapekula L, Mdletshe N, Chetty D, Mowla S. HIV-1 Transactivator of Transcription (Tat) Co-operates With AP-1 Factors to Enhance c-MYC Transcription. Front Cell Dev Biol 2021; 9:693706. [PMID: 34277639 PMCID: PMC8278106 DOI: 10.3389/fcell.2021.693706] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/07/2021] [Indexed: 12/19/2022] Open
Abstract
HIV-1 infection often leads to the development of co-morbidities including cancer. Burkitt lymphoma (BL) is one of the most over-represented non-Hodgkin lymphoma among HIV-infected individuals, and displays a highly aggressive phenotype in this population group, with comparatively poorer outcomes, despite these patients being on anti-retroviral therapy. Accumulating evidence indicates that the molecular pathogenesis of HIV-associated malignancies is unique, with components of the virus playing an active role in driving oncogenesis, and in order to improve patient prognosis and treatment, a better understanding of disease pathobiology and progression is needed. In this study, we found HIV-1 Tat to be localized within the tumor cells of BL patients, and enhanced expression of oncogenic c-MYC in these cells. Using luciferase reporter assays we show that HIV-1 Tat enhances the c-MYC gene promoter activity and that this is partially mediated via two AP-1 binding elements located at positions -1128 and -1375 bp, as revealed by mutagenesis experiments. We further demonstrate, using pull-down assays, that Tat can exist within a protein complex with the AP-1 factor JunB, and that this complex can bind these AP-1 sites within the c-MYC promoter, as shown by in vivo chromatin immunoprecipitation assays. Therefore, these findings show that in HIV-infected individuals, Tat infiltrates B-cells, where it can enhance the expression of oncogenic factors, which contributes toward the more aggressive disease phenotype observed in these patients.
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Affiliation(s)
| | - Lungile Mapekula
- Division of Haematology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Nontlantla Mdletshe
- Division of Haematology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Dharshnee Chetty
- Division of Anatomical Pathology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Shaheen Mowla
- Division of Haematology, Department of Pathology, University of Cape Town, Cape Town, South Africa
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Abstract
Despite widely available antiretroviral therapy, lymphoma remains the leading cause of death for human immunodeficiency virus (HIV)-infected persons in economically developed countries. Even a few months of drug interruptions can lead to drops in the CD4 cell count, HIV viremia, and an increased risk of lymphoma. Currently, good HIV control facilitates intensive therapies appropriate to the lymphoma, including autologous and even allogeneic hematopoietic stem cell transplantation. Nonetheless, HIV-related lymphomas have unique aspects, including pathogenetic differences driven by the presence of HIV and often coinfection with oncogenic viruses. Future therapies might exploit these differences. Lymphoma subtypes also differ in the HIV-infected population, and the disease has a higher propensity for advanced-stage, aggressive presentation and extranodal disease. Other unique aspects include the need to avoid potential interactions between antiretroviral therapy and chemotherapeutic agents and the need for HIV-specific supportive care such as infection prophylaxis. Overall, the care of these patients has progressed sufficiently that recent guidelines from the American Society of Clinical Oncology advocate the inclusion of HIV-infected patients alongside HIV-negative patients in cancer clinical trials when appropriate. This article examines HIV lymphoma and includes Burkitt lymphoma in the general population.
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Gutiérrez-Sevilla JE, Cárdenas-Bedoya J, Escoto-Delgadillo M, Zúñiga-González GM, Pérez-Ríos AM, Gómez-Meda BC, González-Enríquez GV, Figarola-Centurión I, Chavarría-Avila E, Torres-Mendoza BM. Genomic instability in people living with HIV. Mutat Res 2021; 865:503336. [PMID: 33865542 DOI: 10.1016/j.mrgentox.2021.503336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 01/06/2023]
Abstract
The increased life expectancy of people living with HIV (PLWH) receiving antiretroviral treatment (ART) has transformed HIV infection into a chronic disease. However, patients may be at risk of accelerated aging and the accumulation of cellular damage, which may trigger the development of cancer. We evaluated genomic instability in HIV-positive individuals with different viral loads receiving antiretroviral treatment (ART) and in HIV ART-naïve individuals. We included 67 participants divided into four groups: group 1 (n = 24) HIV patients receiving reverse-transcriptase inhibitors (tenofovir/ emtricitabine/ efavirenz and abacavir/ lamivudine/ efavirenz), group 2 (n = 22) HIV patients receiving protease inhibitors combined with other antiretroviral drugs (tenofovir/ emtricitabine with ritonavir/ atazanavir or lopinavir/ ritonavir, and darunavir/ ritonavir/ raltegravir), group 3 (n = 13) HIV ART-naïve patients, and group 4 (n = 8) healthy individuals (controls). Nuclear abnormalities in buccal mucosal samples (micronuclei, binucleated cells, nuclear buds, karyorrhexis, karyolysis, and pyknosis) were quantified. Simultaneously, blood samples were taken to quantify CD4+, CD8+, and HIV viral load. There was a significant age difference between HIV ART-naïve patients and receiving ART groups. Infection time was longer in HIV patients with ART than in ART-naïve patients. There were no differences in sex, smoking, alcohol consumption, or number of micronucleated cells between the study groups. We found higher frequencies of binucleated cells and nuclear buds in HIV patients, HIV ART-naïve, and HIV ART patients compared to the control group. We found a positive correlation between nuclear buds and CD4/CD8 ratio in the HIV ART-naïve group. In conclusion, PLWH showed increased genomic instability. The CD4/CD8 ratio affects the numbers of nuclear buds and binucleated cells. These findings are pertinent to mechanisms of damage and possible strategies to mitigate carcinogenesis in PLWH.
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Affiliation(s)
- Juan Ernesto Gutiérrez-Sevilla
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Laboratorio de Mutagénesis, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Maestría en Microbiología Médica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Jhonathan Cárdenas-Bedoya
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Martha Escoto-Delgadillo
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Guadalajara, Mexico
| | - Guillermo Moisés Zúñiga-González
- Laboratorio de Mutagénesis, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico
| | - Alma Minerva Pérez-Ríos
- Servicio de Infectología, Hospital General Regional 110, Instituto Mexicano del Seguro Social, Guadalajara, Mexico
| | - Belinda Claudia Gómez-Meda
- Instituto de Genética Humana "Dr. Enrique Corona Rivera", Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Gracia Viviana González-Enríquez
- Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Izchel Figarola-Centurión
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Doctorado en Genética Humana, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Efraín Chavarría-Avila
- Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Blanca Miriam Torres-Mendoza
- Laboratorio de Inmunodeficiencias y Retrovirus Humanos, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Mexico; Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico.
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Akbay B, Germini D, Bissenbaev AK, Musinova YR, Sheval EV, Vassetzky Y, Dokudovskaya S. HIV-1 Tat Activates Akt/mTORC1 Pathway and AICDA Expression by Downregulating Its Transcriptional Inhibitors in B Cells. Int J Mol Sci 2021; 22:ijms22041588. [PMID: 33557396 PMCID: PMC7915967 DOI: 10.3390/ijms22041588] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/25/2021] [Accepted: 02/01/2021] [Indexed: 01/26/2023] Open
Abstract
HIV-1 infects T cells, but the most frequent AIDS-related lymphomas are of B-cell origin. Molecular mechanisms of HIV-1-induced oncogenic transformation of B cells remain largely unknown. HIV-1 Tat protein may participate in this process by penetrating and regulating gene expression in B cells. Both immune and cancer cells can reprogram communications between extracellular signals and intracellular signaling pathways via the Akt/mTORC1 pathway, which plays a key role in the cellular response to various stimuli including viral infection. Here, we investigated the role of HIV-1 Tat on the modulation of the Akt/mTORC1 pathway in B cells. We found that HIV-1 Tat activated the Akt/mTORC1 signaling pathway; this leads to aberrant activation of activation-induced cytidine deaminase (AICDA) due to inhibition of the AICDA transcriptional repressors c-Myb and E2F8. These perturbations may ultimately lead to an increased genomic instability and proliferation that might cause B cell malignancies.
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Affiliation(s)
- Burkitkan Akbay
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France; (B.A.); (D.G.); (Y.V.)
- Department of Molecular Biology and Genetics, Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan;
| | - Diego Germini
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France; (B.A.); (D.G.); (Y.V.)
| | - Amangeldy K. Bissenbaev
- Department of Molecular Biology and Genetics, Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan;
- Scientific Research Institute of Biology and Biotechnology Problems, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Yana R. Musinova
- Koltzov Institute of Developmental Biology of Russian Academy of Sciences, 119991 Moscow, Russia;
- Belozersky Institute of Physicochemical Biology, Moscow State University, 119899 Moscow, Russia;
| | - Evgeny V. Sheval
- Belozersky Institute of Physicochemical Biology, Moscow State University, 119899 Moscow, Russia;
| | - Yegor Vassetzky
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France; (B.A.); (D.G.); (Y.V.)
- Koltzov Institute of Developmental Biology of Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Svetlana Dokudovskaya
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France; (B.A.); (D.G.); (Y.V.)
- Correspondence:
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New-Aaron M, Ganesan M, Dagur RS, Kharbanda KK, Poluektova LY, Osna NA. Pancreatogenic Diabetes: Triggering Effects of Alcohol and HIV. BIOLOGY 2021; 10:108. [PMID: 33546230 PMCID: PMC7913335 DOI: 10.3390/biology10020108] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/29/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023]
Abstract
Multiorgan failure may not be completely resolved among people living with HIV despite HAART use. Although the chances of organ dysfunction may be relatively low, alcohol may potentiate HIV-induced toxic effects in the organs of alcohol-abusing, HIV-infected individuals. The pancreas is one of the most implicated organs, which is manifested as diabetes mellitus or pancreatic cancer. Both alcohol and HIV may trigger pancreatitis, but the combined effects have not been explored. The aim of this review is to explore the literature for understanding the mechanisms of HIV and alcohol-induced pancreatotoxicity. We found that while premature alcohol-inducing zymogen activation is a known trigger of alcoholic pancreatitis, HIV entry through C-C chemokine receptor type 5(CCR5)into pancreatic acinar cells may also contribute to pancreatitis in people living with HIV (PLWH). HIV proteins induce oxidative and ER stresses, causing necrosis. Furthermore, infiltrative immune cells induce necrosis on HIV-containing acinar cells. When necrotic products interact with pancreatic stellate cells, they become activated, leading to the release of both inflammatory and profibrotic cytokines and resulting in pancreatitis. Effective therapeutic strategies should block CCR5 and ameliorate alcohol's effects on acinar cells.
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Affiliation(s)
- Moses New-Aaron
- Department of Environmental Health, Occupational Health and Toxicology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Veteran Affairs Nebraska—Western Iowa Health Care System, Omaha, NE 68105, USA; (M.G.); (R.S.D.); (K.K.K.)
| | - Murali Ganesan
- Veteran Affairs Nebraska—Western Iowa Health Care System, Omaha, NE 68105, USA; (M.G.); (R.S.D.); (K.K.K.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Raghubendra Singh Dagur
- Veteran Affairs Nebraska—Western Iowa Health Care System, Omaha, NE 68105, USA; (M.G.); (R.S.D.); (K.K.K.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Kusum K. Kharbanda
- Veteran Affairs Nebraska—Western Iowa Health Care System, Omaha, NE 68105, USA; (M.G.); (R.S.D.); (K.K.K.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Larisa Y. Poluektova
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Natalia A. Osna
- Department of Environmental Health, Occupational Health and Toxicology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Veteran Affairs Nebraska—Western Iowa Health Care System, Omaha, NE 68105, USA; (M.G.); (R.S.D.); (K.K.K.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198, USA;
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Isaguliants M, Bayurova E, Avdoshina D, Kondrashova A, Chiodi F, Palefsky JM. Oncogenic Effects of HIV-1 Proteins, Mechanisms Behind. Cancers (Basel) 2021; 13:305. [PMID: 33467638 PMCID: PMC7830613 DOI: 10.3390/cancers13020305] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/28/2020] [Accepted: 01/04/2021] [Indexed: 02/08/2023] Open
Abstract
People living with human immunodeficiency virus (HIV-1) are at increased risk of developing cancer, such as Kaposi sarcoma (KS), non-Hodgkin lymphoma (NHL), cervical cancer, and other cancers associated with chronic viral infections. Traditionally, this is linked to HIV-1-induced immune suppression with depletion of CD4+ T-helper cells, exhaustion of lymphopoiesis and lymphocyte dysfunction. However, the long-term successful implementation of antiretroviral therapy (ART) with an early start did not preclude the oncological complications, implying that HIV-1 and its antigens are directly involved in carcinogenesis and may exert their effects on the background of restored immune system even when present at extremely low levels. Experimental data indicate that HIV-1 virions and single viral antigens can enter a wide variety of cells, including epithelial. This review is focused on the effects of five viral proteins: envelope protein gp120, accessory protein negative factor Nef, matrix protein p17, transactivator of transcription Tat and reverse transcriptase RT. Gp120, Nef, p17, Tat, and RT cause oxidative stress, can be released from HIV-1-infected cells and are oncogenic. All five are in a position to affect "innocent" bystander cells, specifically, to cause the propagation of (pre)existing malignant and malignant transformation of normal epithelial cells, giving grounds to the direct carcinogenic effects of HIV-1.
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Affiliation(s)
- Maria Isaguliants
- Gamaleya Research Center for Epidemiology and Microbiology, 123098 Moscow, Russia; (E.B.); (D.A.)
- M.P. Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, 108819 Moscow, Russia;
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 17177 Stockholm, Sweden;
- Department of Research, Riga Stradins University, LV-1007 Riga, Latvia
| | - Ekaterina Bayurova
- Gamaleya Research Center for Epidemiology and Microbiology, 123098 Moscow, Russia; (E.B.); (D.A.)
- M.P. Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, 108819 Moscow, Russia;
| | - Darya Avdoshina
- Gamaleya Research Center for Epidemiology and Microbiology, 123098 Moscow, Russia; (E.B.); (D.A.)
- M.P. Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, 108819 Moscow, Russia;
| | - Alla Kondrashova
- M.P. Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, 108819 Moscow, Russia;
| | - Francesca Chiodi
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 17177 Stockholm, Sweden;
| | - Joel M. Palefsky
- Department of Medicine, University of California, San Francisco, CA 94117, USA;
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Thangaraj A, Chivero ET, Tripathi A, Singh S, Niu F, Guo ML, Pillai P, Periyasamy P, Buch S. HIV TAT-mediated microglial senescence: Role of SIRT3-dependent mitochondrial oxidative stress. Redox Biol 2020; 40:101843. [PMID: 33385630 PMCID: PMC7779826 DOI: 10.1016/j.redox.2020.101843] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/10/2020] [Accepted: 12/20/2020] [Indexed: 02/07/2023] Open
Abstract
The advent of combined antiretroviral treatment (cART) as a treatment for HIV-1 infection has not only resulted in a dramatic decrease in the peripheral viral load but has also led to increased life expectancy of the infected individuals. Paradoxically, increased lifespan is accompanied with higher prevalence of age-related comorbidities, including HIV-associated neurocognitive disorders (HAND). Present study was aimed at exploring the role of HIV TAT protein in mediating microglial mitochondrial oxidative stress, ultimately resulting in neuroinflammation and microglial senescence. Our findings demonstrated that exposure of mouse primary microglial cells (mPMs) to HIV TAT protein resulted in a senescence-like phenotype, that was characterized by elevated expression of both p16 and p21 proteins, increased numbers of senescence-associated-β-galactosidase positive cells, augmented cell-cycle arrest, increased release of proinflammatory cytokines and decreased telomerase activity. Additionally, exposure of mPMs to HIV TAT also resulted downregulation of SIRT3 with a concomitant increase in mitochondrial oxidative stress. Dual luciferase reporter assay identified miR-505 as a novel target of SIRT3, which was upregulated in mPMs exposed to HIV TAT. Furthermore, transient transfection of mPMs with either the SIRT3 plasmid or miRNA-505 inhibitor upregulated the expression of SIRT3 and mitochondrial antioxidant enzymes, with a concomitant decrease in microglial senescence. These in vitro findings were also validated in the prefrontal cortices and striatum of HIV transgenic rats as well as cART-treated HIV-infected individuals. In summary, this study underscores a yet undiscovered novel mechanism(s) underlying HIV TAT-mediated induction of senescence phenotype in microglia, involving the miR-505-SIRT3 axis-mediated induction of mitochondrial oxidative stress. HIV TAT induces senescence-like phenotype in microglia. HIV TAT decreases SIRT3 with concomitant increase of mitochondrial ROS. Overexpression of SIRT3 attenuated HIV TAT-mediated microglial senescence. miR-505 negatively regulate SIRT3 expression. miR-505 inhibition prevents SIRT3-mediated mitochondria stress and glial senescence.
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Affiliation(s)
- Annadurai Thangaraj
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Ernest T Chivero
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Ashutosh Tripathi
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Seema Singh
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Fang Niu
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Ming-Lei Guo
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Prakash Pillai
- Division of Neurobiology, Department of Zoology, Faculty of Science, The M.S. University of Baroda, Vadodara, India
| | - Palsamy Periyasamy
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA
| | - Shilpa Buch
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198-5880, USA.
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Hermes DJ, Jacobs IR, Key MC, League AF, Yadav-Samudrala BJ, Xu C, McLane VD, Nass SR, Jiang W, Meeker RB, Ignatowska-Jankowska BM, Lichtman AH, Li Z, Wu Z, Yuan H, Knapp PE, Hauser KF, Fitting S. Escalating morphine dosing in HIV-1 Tat transgenic mice with sustained Tat exposure reveals an allostatic shift in neuroinflammatory regulation accompanied by increased neuroprotective non-endocannabinoid lipid signaling molecules and amino acids. J Neuroinflammation 2020; 17:345. [PMID: 33208151 PMCID: PMC7672881 DOI: 10.1186/s12974-020-01971-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/29/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Human immunodeficiency virus type-1 (HIV-1) and opiates cause long-term inflammatory insult to the central nervous system (CNS) and worsen disease progression and HIV-1-related neuropathology. The combination of these proinflammatory factors reflects a devastating problem as opioids have high abuse liability and continue to be prescribed for certain patients experiencing HIV-1-related pain. METHODS Here, we examined the impact of chronic (3-month) HIV-1 transactivator of transcription (Tat) exposure to short-term (8-day), escalating morphine in HIV-1 Tat transgenic mice that express the HIV-1 Tat protein in a GFAP promoter-regulated, doxycycline (DOX)-inducible manner. In addition to assessing morphine-induced tolerance in nociceptive responses organized at spinal (i.e., tail-flick) and supraspinal (i.e., hot-plate) levels, we evaluated neuroinflammation via positron emission tomography (PET) imaging using the [18F]-PBR111 ligand, immunohistochemistry, and cytokine analyses. Further, we examined endocannabinoid (eCB) levels, related non-eCB lipids, and amino acids via mass spectrometry. RESULTS: Tat-expressing [Tat(+)] transgenic mice displayed antinociceptive tolerance in the tail withdrawal and hot-plate assays compared to control mice lacking Tat [Tat(-)]. This tolerance was accompanied by morphine-dependent increases in Iba-1 ± 3-nitrotryosine immunoreactive microglia, and alterations in pro- and anti-inflammatory cytokines, and chemokines in the spinal cord and striatum, while increases in neuroinflammation were absent by PET imaging of [18F]-PBR111 uptake. Tat and morphine exposure differentially affected eCB levels, non-eCB lipids, and specific amino acids in a region-dependent manner. In the striatum, non-eCB lipids were significantly increased by short-term, escalating morphine exposure, including peroxisome proliferator activator receptor alpha (PPAR-α) ligands N-oleoyl ethanolamide (OEA) and N-palmitoyl ethanolamide (PEA), as well as the amino acids phenylalanine and proline. In the spinal cord, Tat exposure increased amino acids leucine and valine, while morphine decreased levels of tyrosine and valine but did not affect eCBs or non-eCB lipids. CONCLUSION Overall results demonstrate that 3 months of Tat exposure increased morphine tolerance and potentially innate immune tolerance evidenced by reductions in specific cytokines (e.g., IL-1α, IL-12p40) and microglial reactivity. In contrast, short-term, escalating morphine exposure acted as a secondary stressor revealing an allostatic shift in CNS baseline inflammatory responsiveness from sustained Tat exposure.
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Affiliation(s)
- Douglas J Hermes
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Ian R Jacobs
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Megan C Key
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Alexis F League
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | | | - Changqing Xu
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Virginia D McLane
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Sara R Nass
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Wei Jiang
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
- Division of Infectious Diseases, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Rick B Meeker
- Department of Neurology, University of North Carolina, Chapel Hill, NC, USA
| | | | - Aron H Lichtman
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Zibo Li
- Department of Radiology, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Zhanhong Wu
- Department of Radiology, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Hong Yuan
- Department of Radiology, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Pamela E Knapp
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, USA
| | - Kurt F Hauser
- Department of Pharmacology & Toxicology, Virginia Commonwealth University, Richmond, VA, USA
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, USA
| | - Sylvia Fitting
- Department of Psychology & Neuroscience, University of North Carolina, Chapel Hill, NC, USA.
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Ghosh D, Karmakar P. Insight into anti-oxidative carbohydrate polymers from medicinal plants: Structure-activity relationships, mechanism of actions and interactions with bovine serum albumin. Int J Biol Macromol 2020; 166:1022-1034. [PMID: 33166557 DOI: 10.1016/j.ijbiomac.2020.10.258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 01/06/2023]
Abstract
Recently, research associated with natural anti-oxidants leads to the chemical characterization of many compounds possessing strong anti-oxidant activity. Among these anti-oxidants, naturally occurring carbohydrate polymers containing pectic arabinogalactans esterified with phenolic acids in monomeric and dimeric forms are noteworthy. The presence of highly branched arabinogalactan type II side chains and sugar linked phenolic acid residues have been resolved as important parameters. The anti-oxidant activity of these compounds depend on their ability to convert free radicals into stable by-products and themselves oxidized to more stable and less reactive resonance stabilized radicals. Moreover, these carbohydrate polymers form water soluble stable complexes with protein. Such findings support their applications in a diversity of fields including food industry and pharmacy. This review highlights experimental evidences supporting that the carbohydrate polymers containing phenolic polysaccharides may become promising drug candidate for the prevention of aging and age related diseases.
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Affiliation(s)
- Debjani Ghosh
- Bhatar Girls' High School, Bhatar, Purba Bardhaman, West Bengal, India.
| | - Parnajyoti Karmakar
- Government General Degree College at Kalna-I, Medgachi, Muragacha, Purba Bardhaman, West Bengal, India
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Doke M, Jeganathan V, McLaughlin JP, Samikkannu T. HIV-1 Tat and cocaine impact mitochondrial epigenetics: effects on DNA methylation. Epigenetics 2020; 16:980-999. [PMID: 33100130 PMCID: PMC8451453 DOI: 10.1080/15592294.2020.1834919] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Human immunodeficiency virus (HIV) infection and the psychostimulant drug cocaine are known to induce epigenetic changes in DNA methylation that are linked with the severity of viral replication and disease progression, which impair neuronal functions. Increasing evidence suggests that changes in DNA methylation and hydroxymethylation occur in mitochondrial DNA (mtDNA) and represent mitochondrial genome epigenetic modifications (mitoepigenetic modifications). These modifications likely regulate both mtDNA replication and gene expression. However, mtDNA methylation has not been studied extensively in the contexts of cocaine abuse and HIV-1 infection. In the present study, epigenetic factors changed the levels of the DNA methyltransferases (DNMTs) DNMT1, DNMT3a, and DNMT3b, the Ten-eleven translocation (TET) enzymes 1, 2, and 3, and mitochondrial DNMTs (mtDNMTs) both in vitro and in vivo. These changes resulted in alterations in mtDNA methylation levels at CpG and non-CpG sites in human primary astrocytes as measured using targeted next-generation bisulphite sequencing (TNGBS). Moreover, mitochondrial methylation levels in the MT-RNR1, MT-ND5, MT-ND1, D-loop and MT-CYB regions of mtDNA were lower in the HIV-1 Tat and cocaine treatment groups than in the control group. In summary, the present findings suggest that mitoepigenetic modification in the human brain causes the mitochondrial dysfunction that gives rise to neuro-AIDS.
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Affiliation(s)
- Mayur Doke
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, Kingsville, TX, USA
| | - Venkatesh Jeganathan
- Department of Autoimmune and Musculoskeletal Disease, The Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - Jay P McLaughlin
- Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Thangavel Samikkannu
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, Kingsville, TX, USA
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Mdletshe N, Nel A, Shires K, Mowla S. HIV Nef enhances the expression of oncogenic c-MYC and activation-induced cytidine deaminase in Burkitt lymphoma cells, promoting genomic instability. Infect Agent Cancer 2020. [DOI: 10.1186/s13027-020-00320-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Non-Hodgkin lymphoma is of high prevalence among HIV-infected people. In particular, the incidence of HIV-associated Burkitt lymphoma (BL) remains high despite the advent of Highly Active Anti-Retroviral Therapy. Recent evidence shows that serum-soluble HIV proteins can enhance oncogenesis, particularly in lymphoid tissues. This study sought to define the role of HIV protein Negative regulatory factor (Nef) in BL development by assessing its effect on key lymphoma driver genes.
Methods
A recombinant Nef protein was used to assess changes in expressions of activation-induced cytidine deaminase (AICDA/AID) and c-MYC in B lymphocytes exposed extracellularly to the protein. Additionally, changes in the promoter activities of these genes were measured using a Nef-expressing cellular model and reporter assays. Confocal microscopy was used to observe c-MYC and AID expression and localization, and genomic integrity via the recruitment of phosphorylated γ-H2AX, in Nef-exposed cells.
Results
mRNA transcription of c-MYC and AICDA were significantly enhanced in lymphoma cells, up to 2-fold for c-MYC and up to 4-fold for AICDA, when exposed to varying concentrations of Nef (0–1000 ng/ml) and for different periods of time (3, 6 and 12 h). The protein expressions of AID and c-MYC followed a similar pattern and these effects were specific to BL but not lymphoblastoid cells. While the promoter activity of c-MYC was enhanced in the presence of Nef in a dose-dependent manner, the same was not observed for AICDA. Both AID and c-MYC accumulated within the cytoplasmic and nuclear spaces of Nef-exposed lymphoma cells, with a concomitant increase in DNA double strand breaks within the genome.
Conclusions
Exposure to HIV Nef leads to significant increases in AID and c-MYC, leading to genomic instability, potentially enhancing the oncogenic potential of Burkitt lymphoma. Our findings align with that of others to show that HIV proteins can directly contribute to the development and pathogenesis of HIV-associated lymphoma and accounts for the elevated incidence of BL observed in the HIV-infected population.
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Atallah-Yunes SA, Murphy DJ, Noy A. HIV-associated Burkitt lymphoma. LANCET HAEMATOLOGY 2020; 7:e594-e600. [PMID: 32735838 DOI: 10.1016/s2352-3026(20)30126-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 12/30/2022]
Abstract
Burkitt lymphoma is a rare and aggressive non-Hodgkin lymphoma with three classifications: endemic, sporadic, and immunodeficiency-related. High-intensity chemotherapeutic regimens have considerably improved overall survival for patients with Burkitt lymphoma. In this Review of HIV-associated Burkitt lymphoma, we summarise expert opinion and provide general recommendations for the treatment of Burkitt lymphoma in patients with HIV on the basis of retrospective and prospective studies, taking into consideration immune status, CD4 cell counts, the presence of systemic disease, and the risk of CNS involvement or relapse. We also discuss the role of rituximab and antiretroviral therapy. We highlight the reasons behind the possible different mechanisms of lymphomagenesis in HIV-associated Burkitt lymphoma and endemic Burkitt lymphoma, which indicate that HIV might have either a direct or indirect oncogenic role in Burkitt lymphoma. We discuss the possible mechanisms by which HIV and HIV proteins could directly contribute to lymphomagenesis. Identifying these mechanisms might lead to the development of therapies that have fewer toxic effects than high-intensity chemotherapeutic regimens.
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Affiliation(s)
- Suheil Albert Atallah-Yunes
- Department of Medicine, University of Massachusetts Medical School-Baystate Medical Center, Springfield, MA, USA
| | - Dermot J Murphy
- Department of Medicine, Mercy Medical Center, Springfield, MA, USA
| | - Ariela Noy
- Department of Medicine, Memorial Sloan Kettering Cancer Center, Weill Medical College of Cornell University, New York, NY, USA.
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Activation-induced cytidine deaminase: in sickness and in health. J Cancer Res Clin Oncol 2020; 146:2721-2730. [PMID: 32772231 DOI: 10.1007/s00432-020-03348-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 08/04/2020] [Indexed: 12/17/2022]
Abstract
Activation Induced cytidine Deaminase (AID) is an essential enzyme of the adaptive immune system. Its canonical activity is restricted to B lymphocytes, playing an essential role in the diversification of antibodies by enhancing specificity and changing affinity. This is possible through its DNA deaminase function, leading to mutations in DNA. In the last decade, AID has been assigned an additional function: that of a powerful DNA demethylator. Adverse cellular conditions such as chronic inflammation can lead to its deregulation and overexpression. It is an important driver of B-cell lymphoma due to its natural ability to modify DNA through deamination, leading to mutations and epigenetic changes. However, the deregulation of AID is not restricted to lymphoid cells. Recent findings have provided new insights into the role that this protein plays in the development of non-lymphoid cancers, with some research shedding light on novel AID-driven mechanisms of cellular transformation. In this review, we provide an updated narrative of the normal physiological functions of AID. Additionally, we review and discuss the recent research studies that have implicated AID in carcinogenesis in varying tissue types including lymphoid and non-lymphoid cancers. We review the mechanisms, whereby AID promotes carcinogenesis and highlight important areas of future research.
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Darbinian N, Darbinyan A, Merabova N, Selzer ME, Amini S. HIV-1 and HIV-1-Tat Induce Mitochondrial DNA Damage in Human Neurons. JOURNAL OF HIV AND AIDS 2020; 6:176. [PMID: 33506104 PMCID: PMC7837619 DOI: 10.16966/2380-5536.176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Mitochondrial dysregulation is a key event in HIV-1 infection. Recent studies have suggested that age-related neurodegenerative disorders are associated with increased mitochondrial DNA (mtDNA) damage. As accelerated ageing was found in HIV-1 patients, we hypothesized that HIV-1 infection or HIV-1 proteins can lead to mtDNA damage. Unrepaired mtDNA impairs mitochondrial function, which can lead to oxidative stress and cell death. Investigations of mechanisms of mtDNA damage are limited by the lack of available human models. METHODS We compared mtDNA or nDNA (nuclear DNA) damage in human cortical neurons and PBMC cells. Primary neuronal cultures were incubated with conditioned media from HIV-1 infected PBMC, or HIV-1 viral proteins Tat or Vpr. Total genomic DNA (nuclear and mtDNA) was isolated using the QIAamp Kit. Nuclear and mtDNA were amplified using the long q-PCR/Gene Amp XL Kit. Real-Time RT-PCR using mitochondrial energy metabolism array was performed to assess mitochondrial energy metabolism markers. Superoxide dismutase (SOD) activity in neuronal cells was measured by the OxiSelect SOD Activity Assay. Reactive oxygen species (ROS) were determined by the confocal microscopy. ATP levels were analyzed using ATP determination biochemical assay. Mitochondrial, cytoplasmic and nuclear proteins were studied by quantitative western-blot assay. RESULTS We show that both treatment of neuronal cells with HIV-1 conditioned media, or infection of PBMC with HIV-1 increase mtDNA damage in cells. mtDNA damage was also seen in neuronal cells, incubated with HIV-1 proteins, Tat and Vpr. Next, we confirmed that mtDNA damage was also increased in neuronal cells transfected by Tat expressing plasmids. We showed that mtDNA was not damaged in neuronal cells following treatment with heat inactivated HIV-1 or Tat protein. Further, we demonstrated that HIV-1 or Tat caused more mtDNA damage compared to nuclear DNA damage in neuronal cells. Finally, we showed that Tat dysregulates RNA expression of several genes regulating mitochondrial energy metabolism, suggesting involvement of Tat in mitochondrial bioenergetics in human neurons. Finally, our hypothesis was confirmed by qWestern analysis of mitochondrial and apoptotic proteins demonstrating the accumulation of apoptotic Bax and Bad proteins in mitochondrial fraction of Tat-treated neuronal cells, suggesting toxic effects of Tat on mitochondrial survival. CONCLUSION We showed an increase of mtDNA damage in primary neurons, treated with HIV-1 proteins and in PBMC, infected with HIV-1. Increased mtDNA damage can lead to neurodegeneration, and cause neuronal apoptosis. Our system presents a suitable model to study mtDNA changes during HIV-1 infection.
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Affiliation(s)
- Nune Darbinian
- Center for Neural Repair and Rehabilitation, Lewis Katz School of Medicine, Temple University, Philadelphia, USA
| | - Armine Darbinyan
- Department of Pathology, Yale University School of Medicine, New Haven, USA
| | - Nana Merabova
- Center for Neural Repair and Rehabilitation, Lewis Katz School of Medicine, Temple University, Philadelphia, USA
| | - Michael E Selzer
- Center for Neural Repair and Rehabilitation, Lewis Katz School of Medicine, Temple University, Philadelphia, USA
| | - Shohreh Amini
- Department of Biology, College of Science and Technology, Temple University, Philadelphia, USA
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Oncogenic Properties of the EBV ZEBRA Protein. Cancers (Basel) 2020; 12:cancers12061479. [PMID: 32517128 PMCID: PMC7352903 DOI: 10.3390/cancers12061479] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 12/14/2022] Open
Abstract
Epstein Barr Virus (EBV) is one of the most common human herpesviruses. After primary infection, it can persist in the host throughout their lifetime in a latent form, from which it can reactivate following specific stimuli. EBV reactivation is triggered by transcriptional transactivator proteins ZEBRA (also known as Z, EB-1, Zta or BZLF1) and RTA (also known as BRLF1). Here we discuss the structural and functional features of ZEBRA, its role in oncogenesis and its possible implication as a prognostic or diagnostic marker. Modulation of host gene expression by ZEBRA can deregulate the immune surveillance, allow the immune escape, and favor tumor progression. It also interacts with host proteins, thereby modifying their functions. ZEBRA is released into the bloodstream by infected cells and can potentially penetrate any cell through its cell-penetrating domain; therefore, it can also change the fate of non-infected cells. The features of ZEBRA described in this review outline its importance in EBV-related malignancies.
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The Tat Protein of HIV-1 Prevents the Loss of HSV-Specific Memory Adaptive Responses and Favors the Control of Viral Reactivation. Vaccines (Basel) 2020; 8:vaccines8020274. [PMID: 32512757 PMCID: PMC7349931 DOI: 10.3390/vaccines8020274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/27/2020] [Accepted: 06/01/2020] [Indexed: 02/07/2023] Open
Abstract
The development of therapeutic strategies to control the reactivation of the Herpes Simplex Virus (HSV) is an unaddressed priority. In this study, we evaluated whether Tat, a HIV-1 protein displaying adjuvant functions, could improve previously established HSV-specific memory responses and prevent viral reactivation. To this aim, mice were infected with non-lethal doses of HSV-1 and, 44 days later, injected or not with Tat. Mice were then monitored to check their health status and measure memory HSV-specific cellular and humoral responses. The appearance of symptoms associated with HSV-reactivation was observed at significantly higher frequencies in the control group than in the Tat-treated mice. In addition, the control animals experienced a time-dependent decrease in HSV-specific Immunoglobulin G (IgG), while the Tat-treated mice maintained antibody titers over time. IgG levels were directly correlated with the number of HSV-specific CD8+ T cells, suggesting an effect of Tat on both arms of the adaptive immunity. Consistent with the maintenance of HSV-specific immune memory, Tat-treated mice showed a better control of HSV-1 re-infection. Although further studies are necessary to assess whether similar effects are observed in other models, these results indicate that Tat exerts a therapeutic effect against latent HSV-1 infection and re-infection by favoring the maintenance of adaptive immunity.
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Sil S, Hu G, Liao K, Niu F, Callen S, Periyasamy P, Fox HS, Buch S. HIV-1 Tat-mediated astrocytic amyloidosis involves the HIF-1α/lncRNA BACE1-AS axis. PLoS Biol 2020; 18:e3000660. [PMID: 32453744 PMCID: PMC7274476 DOI: 10.1371/journal.pbio.3000660] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 06/05/2020] [Accepted: 04/28/2020] [Indexed: 12/22/2022] Open
Abstract
Increased life expectancy of patients diagnosed with HIV in the current era of antiretroviral therapy is unfortunately accompanied with the prevalence of HIV-associated neurocognitive disorders (HANDs) and risk of comorbidities such as Alzheimer-like pathology. HIV-1 transactivator of transcription (Tat) protein has been shown to induce the production of toxic neuronal amyloid protein and also enhance neurotoxicity. The contribution of astrocytes in Tat-mediated amyloidosis remains an enigma. We report here, in simian immunodeficiency virus (SIV)+ rhesus macaques and patients diagnosed with HIV, brain region-specific up-regulation of amyloid precursor protein (APP) and Aβ (40 and 42) in astrocytes. In addition, we find increased expression of β-site cleaving enzyme (BACE1), APP, and Aβ in human primary astrocytes (HPAs) exposed to Tat. Mechanisms involved up-regulation of hypoxia-inducible factor (HIF-1α), its translocation and binding to the long noncoding RNA (lncRNA) BACE1-antisense transcript (BACE1-AS), resulting, in turn, in the formation of the BACE1-AS/BACE1 RNA complex, subsequently leading to increased BACE1 protein, and activity and generation of Aβ-42. Gene silencing approaches confirmed the regulatory role of HIF-1α in BACE1-AS/BACE1 in Tat-mediated amyloidosis. This is the first report implicating the role of the HIF-1α/lncRNABACE1-AS/BACE1 axis in Tat-mediated induction of astrocytic amyloidosis, which could be targeted as adjunctive therapies for HAND-associated Alzheimer-like comorbidity.
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Affiliation(s)
- Susmita Sil
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Guoku Hu
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Ke Liao
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Fang Niu
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Shannon Callen
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Palsamy Periyasamy
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Howard S. Fox
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Shilpa Buch
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail:
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Simenauer A, Nozik-Grayck E, Cota-Gomez A. The DNA Damage Response and HIV-Associated Pulmonary Arterial Hypertension. Int J Mol Sci 2020; 21:ijms21093305. [PMID: 32392789 PMCID: PMC7246454 DOI: 10.3390/ijms21093305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 12/17/2022] Open
Abstract
The HIV-infected population is at a dramatically increased risk of developing pulmonary arterial hypertension (PAH), a devastating and fatal cardiopulmonary disease that is rare amongst the general population. It is increasingly apparent that PAH is a disease with complex and heterogeneous cellular and molecular pathologies, and options for therapeutic intervention are limited, resulting in poor clinical outcomes for affected patients. A number of soluble HIV factors have been implicated in driving the cellular pathologies associated with PAH through perturbations of various signaling and regulatory networks of uninfected bystander cells in the pulmonary vasculature. While these mechanisms are likely numerous and multifaceted, the overlapping features of PAH cellular pathologies and the effects of viral factors on related cell types provide clues as to the potential mechanisms driving HIV-PAH etiology and progression. In this review, we discuss the link between the DNA damage response (DDR) signaling network, chronic HIV infection, and potential contributions to the development of pulmonary arterial hypertension in chronically HIV-infected individuals.
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Affiliation(s)
- Ari Simenauer
- Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Eva Nozik-Grayck
- Cardiovascular Pulmonary Research Labs and Pediatric Critical Care Medicine, University of Colorado Denver, Pediatric Critical Care Medicine, Aurora, CO 80045, USA;
| | - Adela Cota-Gomez
- Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
- Correspondence: ; Tel.: +1-(303)-724-6085
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Manes TL, Simenauer A, Geohring JL, Flemming J, Brehm M, Cota-Gomez A. The HIV-Tat protein interacts with Sp3 transcription factor and inhibits its binding to a distal site of the sod2 promoter in human pulmonary artery endothelial cells. Free Radic Biol Med 2020; 147:102-113. [PMID: 31863909 PMCID: PMC7039131 DOI: 10.1016/j.freeradbiomed.2019.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/03/2019] [Accepted: 12/16/2019] [Indexed: 12/16/2022]
Abstract
Redox imbalance results in damage to cellular macromolecules and interferes with signaling pathways, leading to an inflammatory cellular and tissue environment. As such, the cellular oxidative environment is tightly regulated by several redox-modulating pathways. Many viruses have evolved intricate mechanisms to manipulate these pathways for their benefit, including HIV-1, which requires a pro-oxidant cellular environment for optimal replication. One such virulence factor responsible for modulating the redox environment is the HIV Transactivator of transcription (Tat). Tat is of particular interest as it is actively secreted by infected cells and internalized by uninfected bystander cells where it can elicit pro-oxidant effects resulting in inflammation and damage. Previously, we demonstrated that Tat regulates basal expression of Superoxide Dismutase 2 (sod2) by altering the binding of the Sp-transcription factors at regions relatively near (approx. -210 nucleotides) upstream of the transcriptional start site. Now, using in silico analysis and a series of sod2 promoter reporter constructs, we have identified putative clusters of Sp-binding sites located further upstream of the proximal sod2 promoter, between nucleotides -3400 to -210, and tested their effect on basal transcription and for their sensitivity to HIV-1 Tat. In this report, we demonstrate that under basal conditions, maximal transcription requires a cluster of Sp-binding sites in the -584 nucleotide region, which is extremely sensitive to Tat. Using chromatin immunoprecipitation (ChIP) we demonstrate that Tat results in altered occupancy of Sp1 and Sp3 at this distal Tat-sensitive regulatory element and strongly stimulated endogenous expression of SOD2 in human pulmonary artery endothelial cells (HPAEC). We also report altered expression of Sp1 and Sp3 in Tat-expressing HPAEC as well as in the lungs of HIV-1 infected humanized mice. Lastly, Tat co-immunoprecipitated with endogenous Sp3 but not Sp1 and did not alter the acetylation state of Sp3. Thus, here, we have defined a novel and important cis-acting factor in HIV-1 Tat-mediated regulation of SOD2, demonstrated that modulation of Sp1 and Sp3 activity by Tat promotes SOD2 expression in primary human pulmonary artery endothelial cells and determined that pulmonary levels of Sp3 as well as SOD2 are increased in the lungs of a mouse model of HIV infection.
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Affiliation(s)
- Terrin L Manes
- University of Colorado Anschutz Medical Campus, Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, 12700 E. 19th Avenue, Mailstop C272, Aurora, CO, 80045, USA
| | - Ari Simenauer
- University of Colorado Anschutz Medical Campus, Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, 12700 E. 19th Avenue, Mailstop C272, Aurora, CO, 80045, USA
| | - Jason L Geohring
- University of Colorado Anschutz Medical Campus, Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, 12700 E. 19th Avenue, Mailstop C272, Aurora, CO, 80045, USA
| | - Juliana Flemming
- University of Colorado Anschutz Medical Campus, Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, 12700 E. 19th Avenue, Mailstop C272, Aurora, CO, 80045, USA
| | - Michael Brehm
- University of Massachusetts Medical School, 368 Plantation Street, AS7-2053, Worcester, MA, 01605, USA
| | - Adela Cota-Gomez
- University of Colorado Anschutz Medical Campus, Department of Medicine Division of Pulmonary Sciences and Critical Care Medicine, 12700 E. 19th Avenue, Mailstop C272, Aurora, CO, 80045, USA.
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HIV-1 Reverse Transcriptase Promotes Tumor Growth and Metastasis Formation via ROS-Dependent Upregulation of Twist. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:6016278. [PMID: 31885806 PMCID: PMC6915010 DOI: 10.1155/2019/6016278] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 11/01/2019] [Accepted: 11/05/2019] [Indexed: 12/15/2022]
Abstract
HIV-induced immune suppression results in the high prevalence of HIV/AIDS-associated malignancies including Kaposi sarcoma, non-Hodgkin lymphoma, and cervical cancer. HIV-infected people are also at an increased risk of “non-AIDS-defining” malignancies not directly linked to immune suppression but associated with viral infections. Their incidence is increasing despite successful antiretroviral therapy. The mechanism behind this phenomenon remains unclear. Here, we obtained daughter clones of murine mammary gland adenocarcinoma 4T1luc2 cells expressing consensus reverse transcriptase of HIV-1 subtype A FSU_A strain (RT_A) with and without primary mutations of drug resistance. In in vitro tests, mutations of resistance to nucleoside inhibitors K65R/M184V reduced the polymerase, and to nonnucleoside inhibitors K103N/G190S, the RNase H activities of RT_A. Expression of these RT_A variants in 4T1luc2 cells led to increased production of the reactive oxygen species (ROS), lipid peroxidation, enhanced cell motility in the wound healing assay, and upregulation of expression of Vimentin and Twist. These properties, particularly, the expression of Twist, correlated with the levels of expression RT_A and/or the production of ROS. When implanted into syngeneic BALB/C mice, 4T1luc2 cells expressing nonmutated RT_A demonstrated enhanced rate of tumor growth and increased metastatic activity, dependent on the level of expression of RT_A and Twist. No enhancement was observed for the clones expressing mutated RT_A variants. Plausible mechanisms are discussed involving differential interactions of mutated and nonmutated RTs with its cellular partners involved in the regulation of ROS. This study establishes links between the expression of HIV-1 RT, production of ROS, induction of EMT, and enhanced propagation of RT-expressing tumor cells. Such scenario can be proposed as one of the mechanisms of HIV-induced/enhanced carcinogenesis not associated with immune suppression.
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Sall FB, El Amine R, Markozashvili D, Tsfasman T, Oksenhendler E, Lipinski M, Vassetzky Y, Germini D. HIV-1 Tat protein induces aberrant activation of AICDA in human B-lymphocytes from peripheral blood. J Cell Physiol 2019; 234:15678-15685. [PMID: 30701532 DOI: 10.1002/jcp.28219] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/10/2019] [Indexed: 01/24/2023]
Abstract
Individuals infected with human immunodeficiency virus (HIV) are at increased risk for Burkitt lymphoma, a B-cell malignancy which occurs after a chromosomal translocation rearranging the MYC oncogene with an immunoglobulin gene locus, usually the IGH heavy chain gene locus. We have previously reported that the HIV protein Tat which circulates in all HIV-positive individuals whatever their immune status caused an increased rate of colocalization between IGH and MYC in B-cells nuclei. We here present in vitro evidence that Tat activates the expression of the AICDA gene that encodes the activation-induced cytidine deaminase whose physiological function is to create double-strand breaks for immunoglobulin gene maturation. In the presence of Tat, DNA damage was observed concomitantly in both MYC and IGH, followed by DNA repair by nonhomologous end joining. AICDA was further found overexpressed in vivo in peripheral blood B-cells from HIV-infected individuals. Thus, the capacity of Tat to spontaneously penetrate B-cells could be sufficient to favor the occurrence of MYC-IGH oncogenic rearrangements during erroneous repair, a plausible cause for the increased incidence of Burkitt lymphoma in the HIV-infected population.
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Affiliation(s)
- Fatimata Bintou Sall
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France
| | - Rawan El Amine
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France
| | - Diana Markozashvili
- Laboratory of Synthetic Biology, Peter the Great St. Petersburg Polytechnic University, St.Petersburg, Russia
| | - Tatyana Tsfasman
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France
| | - Eric Oksenhendler
- Department of Clinical Immunology, Hôpital Saint-Louis, Paris, France
| | - Marc Lipinski
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France
| | - Yegor Vassetzky
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France.,Koltzov Institute of Developmental Biology, Moscow, Russia
| | - Diego Germini
- Department of UMR8126, Institut Gustave Roussy, Villejuif, France.,LIA 1066 French-Russian Joint Cancer Research Laboratory, Villejuif, France
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Zhao X, Ma X, Guo J, Mi M, Wang K, Zhang C, Tang X, Chang L, Huang Y, Tong D. Circular RNA CircEZH2 Suppresses Transmissible Gastroenteritis Coronavirus-induced Opening of Mitochondrial Permeability Transition Pore via Targeting MiR-22 in IPEC-J2. Int J Biol Sci 2019; 15:2051-2064. [PMID: 31592229 PMCID: PMC6775298 DOI: 10.7150/ijbs.36532] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 06/22/2019] [Indexed: 12/18/2022] Open
Abstract
Transmissible gastroenteritis (TGE) is a contagious and infectious disease that is characterized by severe vomiting and diarrhea of swine , especially piglet, and caused by transmissible gastroenteritis coronavirus (TGEV) . TGEV infection provokes mitochondrial damage of porcine intestinal epthelial cell (IPEC), which is responsible for inflammation and cell death. In our previous study, we have demonstrated that circular RNA circEZH2 was down-regulated during TGEV infection and promoted the activation of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) via targeting miR-22 in porcine intestinal epithelial cell line (IPEC-J2). Activation of NF-κB is an important factor for mitochondrial damage. Mitochondrial permeability transition pore (mPTP) opening is a key reason for mitochondrial damage. So, we speculate that circEZH2 may regulate TGEV-induced mPTP opening via NF-kB pathway. In the present study, we found that mPTP opening of IPEC-J2 was occured during TGEV infection and suppressed by circEZH2 via attaching miR-22. Hexokinase 2 (HK2) and interleukin 6 (IL-6) were identified as the targets of miR-22. Silencing HK2 enhanced TGEV-induced mPTP opening, while no effect on NF-κB pathway. Silencing IL-6 promoted TGEV-induced mPTP opening and inhibited NF-κB pathway. Inhibitor of NF-κB increased TGEV-induced mPTP opening. The data revealed that TGEV-induced mPTP opening was regulated via two pathways: circEZH2/miR-22/HK2 axis and circEZH2/miR-22/IL-6/NF-κB axis.
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Affiliation(s)
- Xiaomin Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Xuelian Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Jianxiong Guo
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Mi Mi
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Kaili Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Chuyi Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Xiaoyi Tang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Lingling Chang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Yong Huang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
| | - Dewen Tong
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
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Leonova E, Ošiņa K, Duburs G, Bisenieks E, Germini D, Vassetzky Y, Sjakste N. Metal ions modify DNA-protecting and mutagen-scavenging capacities of the AV-153 1,4-dihydropyridine. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 845:403077. [PMID: 31561891 DOI: 10.1016/j.mrgentox.2019.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 06/19/2019] [Accepted: 06/28/2019] [Indexed: 11/30/2022]
Abstract
1,4-Dihydropyridines (1,4-DHP) possess important biochemical and pharmacological properties, including antioxidant and antimutagenic activities. AV-153-Na, an antimutagenic and DNA-repair enhancing compound was shown to interact with DNA by intercalation. Here we studied DNA binding of several AV-153 salts to evaluate the impact of AV-153 modifications on its DNA binding capacity, the ability to scavenge the peroxynitrite, to protect HeLa and B-cells cells against DNA damage. Affinity of the AV-153 salts to DNA measured by a fluorescence assay was dependent on the metal ion forming a salt in position 4 of the 1,4-DHP, and it decreased as follows: Mg > Na > Ca > Li > Rb > K. AV-153-K and AV-153-Rb could not react chemically with peroxynitrite as opposed to AV-153-Mg and AV-153-Ca, the latter increased the decomposition rate of peroxynitrite. AV-153-Na and AV-153-Ca effectively reduced DNA damage induced by peroxynitrite in HeLa cells, while AV-153-K and AV-153-Rb were less effective, AV-153-Li did not protect the DNA, and AV-153-Mg even caused DNA damage itself. The Na, K, Ca and Mg AV-153 salts were also shown to reduce the level of DNA damage in human B-cells from healthy donors. Thus, metal ions modify both DNA-binding and DNA-protecting effects of the AV-153 salts.
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Affiliation(s)
- Elina Leonova
- University of Latvia, Jelgavas Street 1, Riga, LV1004, Latvia; Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia.
| | - Kristīne Ošiņa
- University of Latvia, Jelgavas Street 1, Riga, LV1004, Latvia.
| | - Gunars Duburs
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia.
| | - Egils Bisenieks
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia.
| | - Diego Germini
- Nuclear Organization and Pathologies, CNRS UMR-8126, Institut Gustave Roussy, 39, rue Camille-Desmoulins, 94805 Villejuif, France.
| | - Yegor Vassetzky
- Nuclear Organization and Pathologies, CNRS UMR-8126, Institut Gustave Roussy, 39, rue Camille-Desmoulins, 94805 Villejuif, France.
| | - Nikolajs Sjakste
- University of Latvia, Jelgavas Street 1, Riga, LV1004, Latvia; Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia.
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Mapekula L, Ramorola BR, Goolam Hoosen T, Mowla S. The interplay between viruses & host microRNAs in cancer - An emerging role for HIV in oncogenesis. Crit Rev Oncol Hematol 2019; 137:108-114. [PMID: 31014506 DOI: 10.1016/j.critrevonc.2019.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/16/2019] [Accepted: 02/17/2019] [Indexed: 12/12/2022] Open
Abstract
Human cancers attributed to viral infections represent a growing proportion of the global cancer burden, with these types of cancers being the leading cause of morbidity and mortality in some regions. The concept that viruses play a causal role in human cancers is not new, but the mechanism thereof, while well described for some viruses, still remains elusive and complex for others, especially in the case of HIV-associated B-cell derived cancers. In the last decade, compelling evidence has demonstrated that cellular microRNAs are deregulated in cancers, with an increasing number of studies identifying microRNAs as potential biomarkers for human cancer diagnosis, prognosis and therapeutic targets or tools. Recent research demonstrates that viruses and viral components manipulate host microRNA expressions to their advantage, and the emerging picture suggests that the virus/microRNA pathway interaction is defined by a plethora of complex mechanisms. In this review, we highlight the current knowledge on virus/microRNA pathway interactions in the context of cancer and provide new insights on HIV as an oncogenic virus.
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Affiliation(s)
- L Mapekula
- Division of Haematology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa
| | - B R Ramorola
- Division of Haematology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa
| | - T Goolam Hoosen
- Division of Haematology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa
| | - S Mowla
- Division of Haematology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa.
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Zhu XY, Guo DW, Lao QC, Xu YQ, Meng ZK, Xia B, Yang H, Li CQ, Li P. Sensitization and synergistic anti-cancer effects of Furanodiene identified in zebrafish models. Sci Rep 2019; 9:4541. [PMID: 30872660 PMCID: PMC6418268 DOI: 10.1038/s41598-019-40866-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 02/19/2019] [Indexed: 12/25/2022] Open
Abstract
Furanodiene is a natural terpenoid isolated from Rhizoma Curcumae, a well-known Chinese medicinal herb that presents anticancer effects in various types of cancer cell lines. In this study, we have successfully established zebrafish xenografts with 5 various human cancer cell lines; and validated these models with anti-cancer drugs used clinically for treating human cancer patients. We found that Furanodiene was therapeutically effective for human JF 305 pancreatic cancer cells and MCF-7 breast cancer cells xenotranplanted into zebrafish. Furanodiene showed a markedly synergistic anti-cancer effect when used in combination with 5-FU (5-Fluorouracil) for both human breast cancer MDA-MB-231 cells and human liver cancer BEL-7402 cells xenotransplanted into zebrafish. Unexpectedly, Furanodiene reversed multiple drug resistance in the zebrafish xenotransplanted with cis-Platinum-resistant human non-small cell lung cancer cells and Adriamycin-resistant human breast cancer cells. Furanodiene played its anti-cancer effects through anti-angiogenesis and inducing ROS production, DNA strand breaks and apoptosis. Furanodiene suppresseed efflux transporter Pgp (P-glycoprotein) function and reduced Pgp protein level, but no effect on Pgp related gene (MDR1) expression. These results suggest sensitizition and synergistic anti-cancer effects of Furanodiene that is worthy of a further investigation.
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Affiliation(s)
- Xiao-Yu Zhu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu Province, 210009, P. R. China.,Hunter Biotechnology, Inc, F1A, building 5, No. 88 Jiangling Road, Binjiang Zone, Hangzhou City, Zhejiang Province, 310051, P. R. China
| | - Dian-Wu Guo
- Minsheng Biopharma Research Institute, F8, building F, No. 1378 Wenyixi Road, Yuhang Zone, Hangzhou City, Zhejiang Province, 310011, P. R. China
| | - Qiao-Cong Lao
- Hunter Biotechnology, Inc, F1A, building 5, No. 88 Jiangling Road, Binjiang Zone, Hangzhou City, Zhejiang Province, 310051, P. R. China
| | - Yi-Qiao Xu
- Hunter Biotechnology, Inc, F1A, building 5, No. 88 Jiangling Road, Binjiang Zone, Hangzhou City, Zhejiang Province, 310051, P. R. China
| | - Zhao-Ke Meng
- Minsheng Biopharma Research Institute, F8, building F, No. 1378 Wenyixi Road, Yuhang Zone, Hangzhou City, Zhejiang Province, 310011, P. R. China
| | - Bo Xia
- Hunter Biotechnology, Inc, F1A, building 5, No. 88 Jiangling Road, Binjiang Zone, Hangzhou City, Zhejiang Province, 310051, P. R. China
| | - Hua Yang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu Province, 210009, P. R. China
| | - Chun-Qi Li
- Hunter Biotechnology, Inc, F1A, building 5, No. 88 Jiangling Road, Binjiang Zone, Hangzhou City, Zhejiang Province, 310051, P. R. China.
| | - Ping Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu Province, 210009, P. R. China.
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48
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Bao D, Wang J, Liu J, Qin T, Liu H. The attenuation of HIV-1 Tat-induced neurotoxicity by Salvianic acid A and Danshen granule. Int J Biol Macromol 2018; 124:863-870. [PMID: 30503790 DOI: 10.1016/j.ijbiomac.2018.11.146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 10/08/2018] [Accepted: 11/14/2018] [Indexed: 11/18/2022]
Abstract
The neurotoxicity of HIV-1 Tat protein contributes significantly to the pathogenesis of HAND, and hence the attractive therapeutic strategies focusing on Tat-induced neurotoxicity are warranted. Salvia miltiorrhiza have been known to antioxidant property and neuroprotective effects. The Danshen granule is the pharmaceutical dosage forms of Salvia miltiorrhiza and Salvianic acid A is an essential chemical constituent of Salvia miltiorrhiza. However, the protective effects of Salvianic acid A and Danshen granule on Tat-induced neurotoxicity remain unknown. Here, we found that Salvianic acid A and Danshen granule remarkable inhibited Tat-induced cell death, blocked LDH release and rescued dendritic spine loss. Furthermore, Salvianic acid A and Danshen granule significantly ameliorates Tat-induced intracellular ROS and MDA production, attenuates cell apoptosis. In addition, Salvianic acid A and Danshen granule pretreatment obviously increases antioxidant enzymatic activity of CAT, SOD and GSH-Px and inhibits apoptotic pathways. In conclusion, this study demonstrated that Salvianic acid A and Danshen granule provides substantial neuroprotection against Tat-induced neurotoxicity, which may be new therapeutic agent in Tat induced HAND or neurodegenerative diseases.
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Affiliation(s)
- Dengke Bao
- Henan Provincial People's Hospital, Henan University, Zhengzhou, Henan 450002, China; Laboratory of Cancer Biomarkers and Liquid Biopsy, Pharmaceutical College of Henan University, Kaifeng, Henan 475004, China
| | - Jingkai Wang
- Department of Nursing, Nanyang Medical College, Nan Yang, Henan 473000, China
| | - Junqi Liu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 453000, China
| | - Tao Qin
- Henan Provincial People's Hospital, Henan University, Zhengzhou, Henan 450002, China.
| | - Hongliang Liu
- Laboratory of Cancer Biomarkers and Liquid Biopsy, Pharmaceutical College of Henan University, Kaifeng, Henan 475004, China.
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Wang H, Ling L, Ai L, Bai L. HDAC6 inhibition induces the failure of mouse early embryonic development. J Cell Physiol 2018; 234:8752-8759. [PMID: 30370558 DOI: 10.1002/jcp.27534] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/10/2018] [Indexed: 11/08/2022]
Abstract
Histone deacetylases (HDACs) have been implicated in numerous biological events. However, to date, the role of HDAC6 in early embryos remains unknown. In the current study, Tubastatin A (TubA), a potent HDAC6 inhibitor, was used to block HDAC6 activity in mouse embryos. We found that TubA exposure significantly reduced the blastocyst formation of early embryos. Confocal microscopy revealed the markedly increased chromosomal congression failure in the mouse embryos treated with the HDAC6 inhibitor. Moreover, the HDAC6 inhibition resulted in the overproduction of reactive oxygen species (ROS) in embryos. In addition, we observed the accumulation of phosphorylated γH2AX in TubA-treated embryos, indicative of the increased DNA damage. In line with this, cell apoptosis of blastocysts was frequently detected in HDAC6-deficient embryos compared with their controls. Altogether, our data indicate that HDAC6 may serve as an important regulator of chromatin structure and mitochondrial function, determining the developmental potential of the early embryos of mouse.
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Affiliation(s)
- Hui Wang
- Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Li Ling
- Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Limei Ai
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Liping Bai
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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50
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Benzo(a)pyrene in Cigarette Smoke Enhances HIV-1 Replication through NF-κB Activation via CYP-Mediated Oxidative Stress Pathway. Sci Rep 2018; 8:10394. [PMID: 29991690 PMCID: PMC6039513 DOI: 10.1038/s41598-018-28500-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/14/2018] [Indexed: 02/06/2023] Open
Abstract
Smoking aggravates HIV-1 pathogenesis and leads to decreased responses to antiretroviral therapy. In this study, we aim to find a molecular mechanism that would explain smoking-induced HIV-1 replication. Benzo(a)pyrene (BaP), a major carcinogen in cigarette, requires metabolic activation through cytochrome P450s (CYPs) to exert its toxic effects. We hypothesized that CYP-mediated BaP metabolism generates reactive oxygen species (ROS), and the resultant oxidative stress aggravates HIV-1 replication. As expected, we observed ~3 to 4-fold increase in HIV-1 replication in U1 cells and human primary macrophages after chronic BaP exposure. We also observed ~30-fold increase in the expression of CYP1A1 at mRNA level, ~2.5-fold increase in its enzymatic activity as well as elevated ROS and cytotoxicity in U1 cells. The knock-down of the CYP1A1 gene using siRNA and treatment with selective CYP inhibitors and antioxidants significantly reduced HIV-1 replication. Further, we observed a nuclear translocation of NF-κB subunits (p50 and p65) after chronic BaP exposure, which was reduced by treatment with siRNA and antioxidants/CYP inhibitors. Suppression of NF-κB pathway using specific NF-κB inhibitors also significantly reduced HIV-1 replication. Altogether, our results suggest that BaP enhances HIV-1 replication in macrophages by a CYP-mediated oxidative stress pathway followed by the NF-κB pathway.
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