1
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Deng J, Shu H, Wang L, Zou X. Modeling virus-stimulated proliferation of CD4 + T-cell, cell-to-cell transmission and viral loss in HIV infection dynamics. Math Biosci 2024; 377:109302. [PMID: 39276975 DOI: 10.1016/j.mbs.2024.109302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 07/23/2024] [Accepted: 09/10/2024] [Indexed: 09/17/2024]
Abstract
Human immunodeficiency virus (HIV) can persist in infected individuals despite prolonged antiretroviral therapy and it may spread through two modes: virus-to-cell and cell-to-cell transmissions. Understanding viral infection dynamics is pivotal for elucidating HIV pathogenesis. In this study, we incorporate the loss term of virions, and both virus-to-cell and cell-to-cell infection modes into a within-host HIV model, which also takes into consideration the proliferation of healthy target cells stimulated by free viruses. By constructing suitable Lyapunov function and applying geometric methods, we establish global stability results of the infection free equilibrium and the infection persistent equilibrium, respectively. Our findings highlight the crucial role of the basic reproduction number in the threshold dynamics. Moreover, we use the loss rate of virions as the bifurcation parameter to investigate stability switches of the positive equilibrium, local Hopf bifurcation, and its global continuation. Numerical simulations validate our theoretical results, revealing rich viral dynamics including backward bifurcation, saddle-node bifurcation, and bistability phenomenon in the sense that the infection free equilibrium and a limit cycle are both locally asymptotically stable. These insights contribute to a deeper understanding of HIV dynamics and inform the development of effective therapeutic strategies.
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Affiliation(s)
- Jiawei Deng
- School of Mathematics and Information Sciences, Guangzhou University, Guangzhou 510006, China
| | - Hongying Shu
- School of Mathematics and Information Sciences, Guangzhou University, Guangzhou 510006, China.
| | - Lin Wang
- Department of Mathematics and Statistics, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada
| | - Xingfu Zou
- Department of Mathematics, University of Western Ontario, London, ON, N6A 5B7, Canada
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2
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Hetrick B, Siddiqui S, Spear M, Guo J, Liang H, Fu Y, Yang Z, Doyle-Meyers L, Pahar B, Veazey RS, Dufour J, Andalibi A, Ling B, Wu Y. Suppression of viral rebound by a Rev-dependent lentiviral particle in SIV-infected rhesus macaques. Gene Ther 2024:10.1038/s41434-024-00467-9. [PMID: 39025983 DOI: 10.1038/s41434-024-00467-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 07/03/2024] [Accepted: 07/10/2024] [Indexed: 07/20/2024]
Abstract
Persistence of human immunodeficiency virus (HIV) reservoirs prevents viral eradication, and consequently HIV-infected patients require lifetime treatment with antiretroviral therapy (ART) [1-5]. Currently, there are no effective therapeutics to prevent HIV rebound upon ART cessation. Here we describe an HIV/SIV Rev-dependent lentiviral particle that can be administered to inhibit viral rebound [6-9]. Using simian immunodeficiency virus (SIV)-infected rhesus macaques as a model, we demonstrate that the administration of pre-assembled SIV Rev-dependent lentiviral particles into SIVmac239-infected Indian rhesus macaques can lead to reduction of viral rebound upon ART termination. One of the injected animals, KC50, controlled plasma and CNS viremia to an undetectable level most of the time for over two years after ART termination. Surprisingly, detailed molecular and immunological characterization revealed that viremia control was concomitant with the induction of neutralizing antibodies (nAbs) following the administration of the Rev-dependent vectors. This study emphasizes the importance of neutralizing antibodies (nAbs) for viremia control [10-15], and also provides proof of concept that the Rev-dependent vector can be used to target viral reservoirs, including the CNS reservoirs, in vivo. However, future large-scale in vivo studies are needed to understand the potential mechanisms of viremia control induced by the Rev-dependent vector.
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Affiliation(s)
- Brian Hetrick
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Summer Siddiqui
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
| | - Mark Spear
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Jia Guo
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Huizhi Liang
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Yajing Fu
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Zhijun Yang
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Lara Doyle-Meyers
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
| | - Bapi Pahar
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Fort Detrick, Frederick, MD, USA
| | - Ronald S Veazey
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
| | - Jason Dufour
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
| | - Ali Andalibi
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA
| | - Binhua Ling
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA, 70433, USA
- Host-Pathogen Interaction Program, Texas Biomedical Research Institute, 8715 W Military Dr., San Antonio, TX, 78227, USA
| | - Yuntao Wu
- Center for Infectious Disease Research, George Mason University, Manassas, VA, 20110, USA.
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3
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Lebrón JA, Ostos FJ, Martínez-Santa M, García-Moscoso F, López-López M, Moyá ML, Bernal E, Bachiller S, González-Ulloa G, Rodríguez-Lucena D, Lopes-Costa T, Fernández-Torres R, Ruiz-Mateos E, Pedrosa JM, Rafii-El-Idrissi Benhnia M, López-Cornejo P. Biocompatible metal-organic frameworks as promising platforms to eradicate HIV reservoirs ex vivo in people living with HIV. J Mater Chem B 2024; 12:5220-5237. [PMID: 38695162 DOI: 10.1039/d4tb00272e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
The HIV attacks the immune system provoking an infection that is considered a global health challenge. Despite antiretroviral treatments being effective in reducing the plasma viral load in the blood to undetectable levels in people living with HIV (PLWH), the disease is not cured and has become chronic. This happens because of the existence of anatomical and cellular viral reservoirs, mainly located in the lymph nodes and gastrointestinal tract, which are composed of infected CD4+ T cells with a resting memory phenotype and inaccessible to antiretroviral therapy. Herein, a new therapeutic strategy based on nanotechnology is presented. Different combinations of antiretroviral drugs (bictegravir/tenofovir/emtricitabine and nevirapine/tenofovir/emtricitabine) and toll-like receptor agonists were encapsulated into metal-organic frameworks (MOFs) PCN-224 and ZIF-8. The encapsulation efficiencies of all the drugs, as well as their release rate from the carriers, were measured. In vitro studies about the cell viability, the hemocompatibility, and the platelet aggregation of the MOFs were carried out. Epifluorescence microscopy assays confirmed the ability of ZIF-8 to target a carboxyfluorescein probe inside HeLa cell lines and PBMCs. These results pave the way for the use of these structures to eliminate latent HIV reservoirs from anatomical compartments through the activation of innate immune cells, and a higher efficacy of the triplet combinations of antiretroviral drugs.
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Affiliation(s)
- José A Lebrón
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García González 1, 41012 Seville, Spain.
| | - Francisco J Ostos
- Department of Medical Biochemistry, Molecular Biology, and Immunology, School of Medicine, University of Seville, 41009 Seville, Spain
- Institute of Biomedicine of Seville, IBiS/Virgen del Rocío University Hospital/CSIC/University of Seville, Clinical Unit of Infectious Diseases, Microbiology and Parasitology, 41013 Seville, Spain
| | - Marta Martínez-Santa
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García González 1, 41012 Seville, Spain.
| | - Francisco García-Moscoso
- Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Ctra. Utrera Km. 1, 41013, Seville, Spain
| | - Manuel López-López
- Department of Chemical Engineering, Physical Chemistry and Materials Science, Campus 'El Carmen', Faculty of Experimental Sciences, University of Huelva, 21071, Huelva, Spain
| | - María L Moyá
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García González 1, 41012 Seville, Spain.
| | - Eva Bernal
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García González 1, 41012 Seville, Spain.
| | - Sara Bachiller
- Department of Medical Biochemistry, Molecular Biology, and Immunology, School of Medicine, University of Seville, 41009 Seville, Spain
- Institute of Biomedicine of Seville, IBiS/Virgen del Rocío University Hospital/CSIC/University of Seville, Clinical Unit of Infectious Diseases, Microbiology and Parasitology, 41013 Seville, Spain
| | - Gabriel González-Ulloa
- Department of Medical Biochemistry, Molecular Biology, and Immunology, School of Medicine, University of Seville, 41009 Seville, Spain
- Institute of Biomedicine of Seville, IBiS/Virgen del Rocío University Hospital/CSIC/University of Seville, Clinical Unit of Infectious Diseases, Microbiology and Parasitology, 41013 Seville, Spain
| | - David Rodríguez-Lucena
- Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Ctra. Utrera Km. 1, 41013, Seville, Spain
| | - Tania Lopes-Costa
- Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Ctra. Utrera Km. 1, 41013, Seville, Spain
| | - Rut Fernández-Torres
- Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González, 1, 41012, Seville, Spain
| | - Ezequiel Ruiz-Mateos
- Institute of Biomedicine of Seville, IBiS/Virgen del Rocío University Hospital/CSIC/University of Seville, Clinical Unit of Infectious Diseases, Microbiology and Parasitology, 41013 Seville, Spain
| | - José M Pedrosa
- Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Ctra. Utrera Km. 1, 41013, Seville, Spain
| | - Mohammed Rafii-El-Idrissi Benhnia
- Department of Medical Biochemistry, Molecular Biology, and Immunology, School of Medicine, University of Seville, 41009 Seville, Spain
- Institute of Biomedicine of Seville, IBiS/Virgen del Rocío University Hospital/CSIC/University of Seville, Clinical Unit of Infectious Diseases, Microbiology and Parasitology, 41013 Seville, Spain
| | - Pilar López-Cornejo
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García González 1, 41012 Seville, Spain.
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4
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Deng Q, Guo T, Qiu Z, Chen Y. A mathematical model for HIV dynamics with multiple infections: implications for immune escape. J Math Biol 2024; 89:6. [PMID: 38762831 DOI: 10.1007/s00285-024-02104-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 12/15/2023] [Accepted: 04/25/2024] [Indexed: 05/20/2024]
Abstract
Multiple infections enable the recombination of different strains, which may contribute to viral diversity. How multiple infections affect the competition dynamics between the two types of strains, the wild and the immune escape mutant, remains poorly understood. This study develops a novel mathematical model that includes the two strains, two modes of viral infection, and multiple infections. For the representative double-infection case, the reproductive numbers are derived and global stabilities of equilibria are obtained via the Lyapunov direct method and theory of limiting systems. Numerical simulations indicate similar viral dynamics regardless of multiplicities of infections though the competition between the two strains would be the fiercest in the case of quadruple infections. Through sensitivity analysis, we evaluate the effect of parameters on the set-point viral loads in the presence and absence of multiple infections. The model with multiple infections predict that there exists a threshold for cytotoxic T lymphocytes (CTLs) to minimize the overall viral load. Weak or strong CTLs immune response can result in high overall viral load. If the strength of CTLs maintains at an intermediate level, the fitness cost of the mutant is likely to have a significant impact on the evolutionary dynamics of mutant viruses. We further investigate how multiple infections alter the viral dynamics during the combination antiretroviral therapy (cART). The results show that viral loads may be underestimated during cART if multiple-infection is not taken into account.
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Affiliation(s)
- Qi Deng
- School of Mathematics and Statistics, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
- Department of Mathematics, Wilfrid Laurier University, Waterloo, N2L 3C5, Canada
| | - Ting Guo
- Aliyun School of Big Data, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Zhipeng Qiu
- School of Mathematics and Statistics, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Yuming Chen
- Department of Mathematics, Wilfrid Laurier University, Waterloo, N2L 3C5, Canada.
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5
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Shan X, Li R, Ma X, Qiu G, Xiang Y, Zhang X, Wu D, Wang L, Zhang J, Wang T, Li W, Xiang Y, Song H, Niu D. Epidemiology, pathogenesis, immune evasion mechanism and vaccine development of porcine Deltacoronavirus. Funct Integr Genomics 2024; 24:79. [PMID: 38653845 DOI: 10.1007/s10142-024-01346-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 04/25/2024]
Abstract
Coronaviruses have been identified as pathogens of gastrointestinal and respiratory diseases in humans and various animal species. In recent years, the global spread of new coronaviruses has had profound influences for global public health and economies worldwide. As highly pathogenic zoonotic viruses, coronaviruses have become the focus of current research. Porcine Deltacoronavirus (PDCoV), an enterovirus belonging to the family of coronaviruses, has emerged on a global scale in the past decade and significantly influenced the swine industry. Moreover, PDCoV infects not only pigs but also other species, including humans, chickens and cattles, exhibiting a broad host tropism. This emphasizes the need for in-depth studies on coronaviruses to mitigate their potential threats. In this review, we provided a comprehensive summary of the current studies on PDCoV. We first reviewed the epidemiological investigations on the global prevalence and distribution of PDCoV. Then, we delved into the studies on the pathogenesis of PDCoV to understand the mechanisms how the virus impacts its hosts. Furthermore, we also presented some exploration studies on the immune evasion mechanisms of the virus to enhance the understanding of host-virus interactions. Despite current limitations in vaccine development for PDCoV, we highlighted the inhibitory effects observed with certain substances, which offers a potential direction for future research endeavors. In conclusion, this review summarized the scientific findings in epidemiology, pathogenesis, immune evasion mechanisms and vaccine development of PDCoV. The ongoing exploration of potential vaccine candidates and the insights gained from inhibitory substances have provided a solid foundation for future vaccine development to prevent and control diseases associated with PDCoV.
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Affiliation(s)
- Xueting Shan
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China
| | - Rui Li
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China
| | - Xiang Ma
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China
- Jinhua Jinfan Feed Co., Ltd, Jinhua, 321000, Zhejiang, China
| | - Guoqiang Qiu
- Deqing County Ecological Forestry Comprehensive Service Center, Deqing, 313200, Zhejiang, China
| | - Yi Xiang
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China
- The Central Hospital of Jinhua City, Jinhua, 321000, Zhejiang, China
| | - Xiaojun Zhang
- Jinhua Academy of Agricultural Sciences, Jinhua, 321000, Zhejiang, China
| | - De Wu
- Postdoctoral Research Station, Jinhua Development Zone, Jinhua, 321000, Zhejiang, China
| | - Lu Wang
- The Agriculture and Rural Affairs Bureau of Jinhua City, Jinhua, 321000, Zhejiang, China
| | - Jianhong Zhang
- The Agriculture and Rural Affairs Bureau of Jinhua City, Jinhua, 321000, Zhejiang, China
| | - Tao Wang
- Nanjing Kgene Genetic Engineering Co., Ltd, Nanjing, 211300, Jiangsu, China
| | - Weifen Li
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Yun Xiang
- Jinhua Academy of Agricultural Sciences, Jinhua, 321000, Zhejiang, China.
| | - Houhui Song
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China.
| | - Dong Niu
- College of Animal Science and Technology & College of Veterinary Medicine, Key Laboratory of Applied Technology on Green-Eco- Healthy Animal Husbandry of Zhejiang Province, Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Joint Laboratory for Animal Health Big Data Analytics, Zhejiang A&F University, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, 666 Wusu street, Lin'an District, Hangzhou, 311300, Zhejiang, China.
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6
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Shu H, Jin HY, Wang XS, Wu J. Viral infection dynamics with immune chemokines and CTL mobility modulated by the infected cell density. J Math Biol 2024; 88:43. [PMID: 38491217 DOI: 10.1007/s00285-024-02065-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 12/05/2023] [Accepted: 02/09/2024] [Indexed: 03/18/2024]
Abstract
We study a viral infection model incorporating both cell-to-cell infection and immune chemokines. Based on experimental results in the literature, we make a standing assumption that the cytotoxic T lymphocytes (CTL) will move toward the location with more infected cells, while the diffusion rate of CTL is a decreasing function of the density of infected cells. We first establish the global existence and ultimate boundedness of the solution via a priori energy estimates. We then define the basic reproduction number of viral infection R 0 and prove (by the uniform persistence theory, Lyapunov function technique and LaSalle invariance principle) that the infection-free steady state E 0 is globally asymptotically stable ifR 0 < 1 . WhenR 0 > 1 , then E 0 becomes unstable, and another basic reproduction number of CTL response R 1 becomes the dynamic threshold in the sense that ifR 1 < 1 , then the CTL-inactivated steady state E 1 is globally asymptotically stable; and ifR 1 > 1 , then the immune response is uniform persistent and, under an additional technical condition the CTL-activated steady state E 2 is globally asymptotically stable. To establish the global stability results, we need to prove point dissipativity, obtain uniform persistence, construct suitable Lyapunov functions, and apply the LaSalle invariance principle.
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Affiliation(s)
- Hongying Shu
- School of Mathematics and Information Science, Shaanxi Normal University, Xi'an, 710062, China
| | - Hai-Yang Jin
- Department of Mathematics, South China University of Technology, Guangzhou, 510640, China
| | - Xiang-Sheng Wang
- Department of Mathematics, University of Louisiana at Lafayette, Lafayette, LA, 70503, USA
| | - Jianhong Wu
- Department of Mathematics and Statistics, York University, Toronto, ON, M3J 1P3, Canada.
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7
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Hikichi Y, Grover JR, Schäfer A, Mothes W, Freed EO. Epistatic pathways can drive HIV-1 escape from integrase strand transfer inhibitors. SCIENCE ADVANCES 2024; 10:eadn0042. [PMID: 38427738 PMCID: PMC10906922 DOI: 10.1126/sciadv.adn0042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/26/2024] [Indexed: 03/03/2024]
Abstract
People living with human immunodeficiency virus (HIV) receiving integrase strand transfer inhibitors (INSTIs) have been reported to experience virological failure in the absence of resistance mutations in integrase. To elucidate INSTI resistance mechanisms, we propagated HIV-1 in the presence of escalating concentrations of the INSTI dolutegravir. HIV-1 became resistant to dolutegravir by sequentially acquiring mutations in the envelope glycoprotein (Env) and the nucleocapsid protein. The selected Env mutations enhance the ability of the virus to spread via cell-cell transfer, thereby increasing the multiplicity of infection (MOI). While the selected Env mutations confer broad resistance to multiple classes of antiretrovirals, the fold resistance is ~2 logs higher for INSTIs than for other classes of drugs. We demonstrate that INSTIs are more readily overwhelmed by high MOI than other classes of antiretrovirals. Our findings advance the understanding of how HIV-1 can evolve resistance to antiretrovirals, including the potent INSTIs, in the absence of drug-target gene mutations.
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Affiliation(s)
- Yuta Hikichi
- Virus-Cell Interaction Section, HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA
| | - Jonathan R. Grover
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, USA
| | - Alicia Schäfer
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, USA
| | - Walther Mothes
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, USA
| | - Eric O. Freed
- Virus-Cell Interaction Section, HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA
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8
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Woottum M, Yan S, Sayettat S, Grinberg S, Cathelin D, Bekaddour N, Herbeuval JP, Benichou S. Macrophages: Key Cellular Players in HIV Infection and Pathogenesis. Viruses 2024; 16:288. [PMID: 38400063 PMCID: PMC10893316 DOI: 10.3390/v16020288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/12/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
Although cells of the myeloid lineages, including tissue macrophages and conventional dendritic cells, were rapidly recognized, in addition to CD4+ T lymphocytes, as target cells of HIV-1, their specific roles in the pathophysiology of infection were initially largely neglected. However, numerous studies performed over the past decade, both in vitro in cell culture systems and in vivo in monkey and humanized mouse animal models, led to growing evidence that macrophages play important direct and indirect roles as HIV-1 target cells and in pathogenesis. It has been recently proposed that macrophages are likely involved in all stages of HIV-1 pathogenesis, including virus transmission and dissemination, but above all, in viral persistence through the establishment, together with latently infected CD4+ T cells, of virus reservoirs in many host tissues, the major obstacle to virus eradication in people living with HIV. Infected macrophages are indeed found, very often as multinucleated giant cells expressing viral antigens, in almost all lymphoid and non-lymphoid tissues of HIV-1-infected patients, where they can probably persist for long period of time. In addition, macrophages also likely participate, directly as HIV-1 targets or indirectly as key regulators of innate immunity and inflammation, in the chronic inflammation and associated clinical disorders observed in people living with HIV, even in patients receiving effective antiretroviral therapy. The main objective of this review is therefore to summarize the recent findings, and also to revisit older data, regarding the critical functions of tissue macrophages in the pathophysiology of HIV-1 infection, both as major HIV-1-infected target cells likely found in almost all tissues, as well as regulators of innate immunity and inflammation during the different stages of HIV-1 pathogenesis.
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Affiliation(s)
- Marie Woottum
- Institut Cochin, Inserm U1016, CNRS UMR-8104, Université Paris Cité, 75014 Paris, France; (M.W.); (S.Y.); (S.S.)
| | - Sen Yan
- Institut Cochin, Inserm U1016, CNRS UMR-8104, Université Paris Cité, 75014 Paris, France; (M.W.); (S.Y.); (S.S.)
| | - Sophie Sayettat
- Institut Cochin, Inserm U1016, CNRS UMR-8104, Université Paris Cité, 75014 Paris, France; (M.W.); (S.Y.); (S.S.)
| | - Séverine Grinberg
- CNRS UMR-8601, Université Paris Cité, 75006 Paris, France; (S.G.); (D.C.); (N.B.); (J.-P.H.)
| | - Dominique Cathelin
- CNRS UMR-8601, Université Paris Cité, 75006 Paris, France; (S.G.); (D.C.); (N.B.); (J.-P.H.)
| | - Nassima Bekaddour
- CNRS UMR-8601, Université Paris Cité, 75006 Paris, France; (S.G.); (D.C.); (N.B.); (J.-P.H.)
| | - Jean-Philippe Herbeuval
- CNRS UMR-8601, Université Paris Cité, 75006 Paris, France; (S.G.); (D.C.); (N.B.); (J.-P.H.)
| | - Serge Benichou
- Institut Cochin, Inserm U1016, CNRS UMR-8104, Université Paris Cité, 75014 Paris, France; (M.W.); (S.Y.); (S.S.)
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9
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Cafaro A, Schietroma I, Sernicola L, Belli R, Campagna M, Mancini F, Farcomeni S, Pavone-Cossut MR, Borsetti A, Monini P, Ensoli B. Role of HIV-1 Tat Protein Interactions with Host Receptors in HIV Infection and Pathogenesis. Int J Mol Sci 2024; 25:1704. [PMID: 38338977 PMCID: PMC10855115 DOI: 10.3390/ijms25031704] [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: 12/30/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
Each time the virus starts a new round of expression/replication, even under effective antiretroviral therapy (ART), the transactivator of viral transcription Tat is one of the first HIV-1 protein to be produced, as it is strictly required for HIV replication and spreading. At this stage, most of the Tat protein exits infected cells, accumulates in the extracellular matrix and exerts profound effects on both the virus and neighbor cells, mostly of the innate and adaptive immune systems. Through these effects, extracellular Tat contributes to the acquisition of infection, spreading and progression to AIDS in untreated patients, or to non-AIDS co-morbidities in ART-treated individuals, who experience inflammation and immune activation despite virus suppression. Here, we review the role of extracellular Tat in both the virus life cycle and on cells of the innate and adaptive immune system, and we provide epidemiological and experimental evidence of the importance of targeting Tat to block residual HIV expression and replication. Finally, we briefly review vaccine studies showing that a therapeutic Tat vaccine intensifies ART, while its inclusion in a preventative vaccine may blunt escape from neutralizing antibodies and block early events in HIV acquisition.
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Affiliation(s)
- Aurelio Cafaro
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (L.S.); (R.B.); (M.C.); (F.M.); (S.F.); (M.R.P.-C.); (A.B.); (P.M.)
| | | | | | | | | | | | | | | | | | | | - Barbara Ensoli
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (L.S.); (R.B.); (M.C.); (F.M.); (S.F.); (M.R.P.-C.); (A.B.); (P.M.)
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10
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Mazurov D, Herschhorn A. Ultrasensitive quantification of HIV-1 cell-to-cell transmission in primary human CD4 + T cells measures viral sensitivity to broadly neutralizing antibodies. mBio 2024; 15:e0242823. [PMID: 38063394 PMCID: PMC10790777 DOI: 10.1128/mbio.02428-23] [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: 09/06/2023] [Accepted: 11/07/2023] [Indexed: 01/17/2024] Open
Abstract
IMPORTANCE HIV-1 can efficiently transmit from one cell to another but accurate quantification of this mode of transmission is still challenging. Here, we developed an ultrasensitive assay to measure HIV-1 transmission between cells and to evaluate HIV-1 escape from broadly neutralizing antibodies in primary human T cells. This assay will contribute to understanding the fundamental mechanisms of HIV-1 cell-to-cell transmission, allow evaluation of pre-existing or acquired HIV-1 resistance in clinical trials, and can be adapted to study the biology of other retroviruses.
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Affiliation(s)
- Dmitriy Mazurov
- Division of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Alon Herschhorn
- Division of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, Minnesota, USA
- Institute for Engineering in Medicine, Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota, USA
- Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, Minnesota, USA
- The College of Veterinary Medicine Graduate Program, University of Minnesota, Minneapolis, Minnesota, USA
- Molecular Pharmacology and Therapeutics Graduate Program, University of Minnesota, Minneapolis, Minnesota, USA
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11
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Abstract
Most enveloped viruses encode viral fusion proteins to penetrate host cell by membrane fusion. Interestingly, many enveloped viruses can also use viral fusion proteins to induce cell-cell fusion, both in vitro and in vivo, leading to the formation of syncytia or multinucleated giant cells (MGCs). In addition, some non-enveloped viruses encode specialized viral proteins that induce cell-cell fusion to facilitate viral spread. Overall, viruses that can induce cell-cell fusion are nearly ubiquitous in mammals. Virus cell-to-cell spread by inducing cell-cell fusion may overcome entry and post-entry blocks in target cells and allow evasion of neutralizing antibodies. However, molecular mechanisms of virus-induced cell-cell fusion remain largely unknown. Here, I summarize the current understanding of virus-induced cell fusion and syncytia formation.
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Affiliation(s)
- Maorong Xie
- Division of Infection and Immunity, UCL, London, UK.
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12
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Lustig G, Ganga Y, Rodel HE, Tegally H, Khairallah A, Jackson L, Cele S, Khan K, Jule Z, Reedoy K, Karim F, Bernstein M, Ndung’u T, Moosa MYS, Archary D, de Oliveira T, Lessells R, Neher RA, Abdool Karim SS, Sigal A. SARS-CoV-2 infection in immunosuppression evolves sub-lineages which independently accumulate neutralization escape mutations. Virus Evol 2023; 10:vead075. [PMID: 38361824 PMCID: PMC10868398 DOI: 10.1093/ve/vead075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 11/11/2023] [Accepted: 12/21/2023] [Indexed: 02/17/2024] Open
Abstract
One mechanism of variant formation may be evolution during long-term infection in immunosuppressed people. To understand the viral phenotypes evolved during such infection, we tested SARS-CoV-2 viruses evolved from an ancestral B.1 lineage infection lasting over 190 days post-diagnosis in an advanced HIV disease immunosuppressed individual. Sequence and phylogenetic analysis showed two evolving sub-lineages, with the second sub-lineage replacing the first sub-lineage in a seeming evolutionary sweep. Each sub-lineage independently evolved escape from neutralizing antibodies. The most evolved virus for the first sub-lineage (isolated day 34) and the second sub-lineage (isolated day 190) showed similar escape from ancestral SARS-CoV-2 and Delta-variant infection elicited neutralizing immunity despite having no spike mutations in common relative to the B.1 lineage. The day 190 isolate also evolved higher cell-cell fusion and faster viral replication and caused more cell death relative to virus isolated soon after diagnosis, though cell death was similar to day 34 first sub-lineage virus. These data show that SARS-CoV-2 strains in prolonged infection in a single individual can follow independent evolutionary trajectories which lead to neutralization escape and other changes in viral properties.
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Affiliation(s)
- Gila Lustig
- Centre for the AIDS Programme of Research in South Africa, 719 Umbilo Road, Durban 4001, South Africa
| | - Yashica Ganga
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Hylton E Rodel
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- Division of Infection and Immunity, University College London, UCL Cruciform Building Gower Street, London WC1E 6BT, UK
| | - Houriiyah Tegally
- KwaZulu-Natal Research Innovation and Sequencing Platform, 719 Umbilo Road, Durban 4001, South Africa
- Centre for Epidemic Response and Innovation, School of Data Science and Computational Thinking, Stellenbosch University, Francie Van Zijl Drive, Cape Town 7505, South Africa
| | - Afrah Khairallah
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Laurelle Jackson
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Sandile Cele
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
| | - Khadija Khan
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
| | - Zesuliwe Jule
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Kajal Reedoy
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Farina Karim
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
| | - Mallory Bernstein
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
| | - Thumbi Ndung’u
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- Division of Infection and Immunity, University College London, UCL Cruciform Building Gower Street, London WC1E 6BT, UK
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
- HIV Pathogenesis Programme, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
- Ragon Institute of MGH, MIT and Harvard University, 400 Technology Square, Cambridge, MA 02139, USA
| | - Mahomed-Yunus S Moosa
- Department of Infectious Diseases, Nelson R. Mandela School of Clinical Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
| | - Derseree Archary
- Centre for the AIDS Programme of Research in South Africa, 719 Umbilo Road, Durban 4001, South Africa
| | - Tulio de Oliveira
- KwaZulu-Natal Research Innovation and Sequencing Platform, 719 Umbilo Road, Durban 4001, South Africa
- Centre for Epidemic Response and Innovation, School of Data Science and Computational Thinking, Stellenbosch University, Francie Van Zijl Drive, Cape Town 7505, South Africa
- Department of Global Health, University of Washington, 3980 15th Avenue NE, Seattle, WA 98105, USA
| | - Richard Lessells
- KwaZulu-Natal Research Innovation and Sequencing Platform, 719 Umbilo Road, Durban 4001, South Africa
| | - Richard A Neher
- SIB Swiss Institute of Bioinformatics, Quartier Sorge - Bâtiment Amphipôle, Lausanne 1015, Switzerland
- Biozentrum, University of Basel, Spitalstrasse 41 4056, Basel, Switzerland
| | - Salim S Abdool Karim
- Centre for the AIDS Programme of Research in South Africa, 719 Umbilo Road, Durban 4001, South Africa
- Department of Epidemiology, Mailman School of Public Health, Columbia University, 722 West 168th Street, New York, NY 10032, United States
| | - Alex Sigal
- Centre for the AIDS Programme of Research in South Africa, 719 Umbilo Road, Durban 4001, South Africa
- Africa Health Research Institute, 719 Umbilo Road, Durban 4001, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 719 Umbilo Road, Durban 4001, South Africa
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13
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Wu F, Simonetti FR. Learning from Persistent Viremia: Mechanisms and Implications for Clinical Care and HIV-1 Cure. Curr HIV/AIDS Rep 2023; 20:428-439. [PMID: 37955826 PMCID: PMC10719122 DOI: 10.1007/s11904-023-00674-w] [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] [Accepted: 10/11/2023] [Indexed: 11/14/2023]
Abstract
PURPOSE OF REVIEW In this review, we discuss what persistent viremia has taught us about the biology of the HIV-1 reservoir during antiretroviral therapy (ART). We will also discuss the implications of this phenomenon for HIV-1 cure research and its clinical management. RECENT FINDINGS While residual viremia (RV, 1-3 HIV-1 RNA copies/ml) can be detected in most of people on ART, some individuals experience non-suppressible viremia (NSV, > 20-50 copies/mL) despite optimal adherence. When issues of drug resistance and pharmacokinetics are ruled out, this persistent virus in plasma is the reflection of virus production from clonally expanded CD4+ T cells carrying proviruses. Recent work has shown that a fraction of the proviruses source of NSV are not infectious, due to defects in the 5'-Leader sequence. However, additional viruses and host determinants of NSV are not fully understood. The study of NSV is of prime importance because it represents a challenge for the clinical care of people on ART, and it sheds light on virus-host interactions that could advance HIV-1 remission research.
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Affiliation(s)
- Fengting Wu
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, 733 N Broadway, Baltimore, MD, 21205, USA
| | - Francesco R Simonetti
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, 733 N Broadway, Baltimore, MD, 21205, USA.
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14
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Calado M, Pires D, Conceição C, Santos-Costa Q, Anes E, Azevedo-Pereira JM. Human immunodeficiency virus transmission-Mechanisms underlying the cell-to-cell spread of human immunodeficiency virus. Rev Med Virol 2023; 33:e2480. [PMID: 37698498 DOI: 10.1002/rmv.2480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/25/2023] [Accepted: 09/04/2023] [Indexed: 09/13/2023]
Abstract
Despite the success of combined antiretroviral therapy in controlling viral load and reducing the risk of human immunodeficiency virus (HIV) transmission, an estimated 1.5 million new infections occurred worldwide in 2021. These new infections are mainly the result of sexual intercourse and thus involve cells present on the genital mucosa, such as dendritic cells (DCs), macrophages (Mø) and CD4+ T lymphocytes. Understanding the mechanisms by which HIV interacts with these cells and how HIV exploits these interactions to establish infection in a new human host is critical to the development of strategies to prevent and control HIV transmission. In this review, we explore how HIV has evolved to manipulate some of the physiological roles of these cells, thereby gaining access to strategic cellular niches that are critical for the spread and pathogenesis of HIV infection. The interaction of HIV with DCs, Mø and CD4+ T lymphocytes, and the role of the intercellular transfer of viral particles through the establishment of the infectious or virological synapses, but also through membrane protrusions such as filopodia and tunnelling nanotubes (TNTs), and cell fusion or cell engulfment processes are presented and discussed.
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Affiliation(s)
- Marta Calado
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
| | - David Pires
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
- Center for Interdisciplinary Research in Health, Católica Medical School, Universidade Católica Portuguesa, Rio de Mouro, Portugal
| | - Carolina Conceição
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
| | - Quirina Santos-Costa
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
| | - Elsa Anes
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
| | - José Miguel Azevedo-Pereira
- Faculty of Pharmacy, Host-Pathogen Interactions Unit, Research Institute for Medicines, iMed-ULisboa, Universidade de Lisboa, Lisboa, Portugal
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15
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Bou JV, Taguwa S, Matsuura Y. Trick-or-Trap: Extracellular Vesicles and Viral Transmission. Vaccines (Basel) 2023; 11:1532. [PMID: 37896936 PMCID: PMC10611016 DOI: 10.3390/vaccines11101532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/15/2023] [Accepted: 09/23/2023] [Indexed: 10/29/2023] Open
Abstract
Extracellular vesicles (EVs) are lipid membrane-enclosed particles produced by most cells, playing important roles in various biological processes. They have been shown to be involved in antiviral mechanisms such as transporting antiviral molecules, transmitting viral resistance, and participating in antigen presentation. While viral transmission was traditionally thought to occur through independent viral particles, the process of viral infection is complex, with multiple barriers and challenges that viruses must overcome for successful infection. As a result, viruses exploit the intercellular communication pathways of EVs to facilitate cluster transmission, increasing their chances of infecting target cells. Viral vesicle transmission offers two significant advantages. Firstly, it enables the collective transmission of viral genomes, increasing the chances of infection and promoting interactions between viruses in subsequent generations. Secondly, the use of vesicles as vehicles for viral transmission provides protection to viral particles against environmental factors, while also expanding the cell tropism allowing viruses to reach cells in a receptor-independent manner. Understanding the role of EVs in viral transmission is crucial for comprehending virus evolution and developing innovative antiviral strategies, therapeutic interventions, and vaccine approaches.
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Affiliation(s)
- Juan-Vicente Bou
- Laboratory of Virus Control, Center for Infectious Disease Education and Research, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shuhei Taguwa
- Laboratory of Virus Control, Center for Infectious Disease Education and Research, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
- Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Center for Advanced Modalities and DDS, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yoshiharu Matsuura
- Laboratory of Virus Control, Center for Infectious Disease Education and Research, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
- Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Center for Advanced Modalities and DDS, Osaka University, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
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16
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Gong K, Lai Y. Development trends of immune activation during HIV infection in recent three decades: a bibliometric analysis based on CiteSpace. Arch Microbiol 2023; 205:283. [PMID: 37432538 DOI: 10.1007/s00203-023-03624-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/18/2023] [Accepted: 07/02/2023] [Indexed: 07/12/2023]
Abstract
This study aimed to evaluate and pinpoint the status, hot areas, and frontiers of immune activation during HIV infection utilizing CiteSpace. From 1990 to 2022, we searched for studies on immune activation during HIV infection in the Web of Science Core Collection. CiteSpace was used to visually analyze the publications to identify the research status and pertinent research hotspots and frontiers in terms of the countries, institutions, authors, references, journals, and keywords. The Web of Science Core Collection yielded 5321 articles on immune activation during HIV infection. With 2854 and 364 articles, the United States and the University of California, San Francisco were the leading nation and institution in this domain. Steven G. Deeks has published 95 papers and is the most published author. The top cited articles on microbial translocation as a significant factor during HIV infection were published by Brenchley et al. Research on molecular/biology/genetics is often referenced in publications in the journals of molecular/biology/immunology. Inflammation, risk, mortality, cardiovascular disease, persistence, and biomarkers will be high-frequency words that are hot topics of research. According to the results, there was a strong collaboration between countries and organizations but little collaboration among authors. Molecular biology, immunology, and medicine are the main study subjects. The current hot topics in research are inflammation, risk, mortality, cardiovascular disease, persistence, and biomarkers. Future studies should concentrate on reducing the pathological changes caused by inflammation and altering the mechanisms of immune activation to reduce the size of the viral reservoir.
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Affiliation(s)
- Kang Gong
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yu Lai
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
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17
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Bruce JW, Park E, Magnano C, Horswill M, Richards A, Potts G, Hebert A, Islam N, Coon JJ, Gitter A, Sherer N, Ahlquist P. HIV-1 virological synapse formation enhances infection spread by dysregulating Aurora Kinase B. PLoS Pathog 2023; 19:e1011492. [PMID: 37459363 PMCID: PMC10374047 DOI: 10.1371/journal.ppat.1011492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 07/27/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023] Open
Abstract
HIV-1 spreads efficiently through direct cell-to-cell transmission at virological synapses (VSs) formed by interactions between HIV-1 envelope proteins (Env) on the surface of infected cells and CD4 receptors on uninfected target cells. Env-CD4 interactions bring the infected and uninfected cellular membranes into close proximity and induce transport of viral and cellular factors to the VS for efficient virion assembly and HIV-1 transmission. Using novel, cell-specific stable isotope labeling and quantitative mass spectrometric proteomics, we identified extensive changes in the levels and phosphorylation states of proteins in HIV-1 infected producer cells upon mixing with CD4+ target cells under conditions inducing VS formation. These coculture-induced alterations involved multiple cellular pathways including transcription, TCR signaling and, unexpectedly, cell cycle regulation, and were dominated by Env-dependent responses. We confirmed the proteomic results using inhibitors targeting regulatory kinases and phosphatases in selected pathways identified by our proteomic analysis. Strikingly, inhibiting the key mitotic regulator Aurora kinase B (AURKB) in HIV-1 infected cells significantly increased HIV activity in cell-to-cell fusion and transmission but had little effect on cell-free infection. Consistent with this, we found that AURKB regulates the fusogenic activity of HIV-1 Env. In the Jurkat T cell line and primary T cells, HIV-1 Env:CD4 interaction also dramatically induced cell cycle-independent AURKB relocalization to the centromere, and this signaling required the long (150 aa) cytoplasmic C-terminal domain (CTD) of Env. These results imply that cytoplasmic/plasma membrane AURKB restricts HIV-1 envelope fusion, and that this restriction is overcome by Env CTD-induced AURKB relocalization. Taken together, our data reveal a new signaling pathway regulating HIV-1 cell-to-cell transmission and potential new avenues for therapeutic intervention through targeting the Env CTD and AURKB activity.
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Affiliation(s)
- James W. Bruce
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Institute for Molecular Virology, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Eunju Park
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Institute for Molecular Virology, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Chris Magnano
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- Department of Computer Sciences, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Mark Horswill
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Institute for Molecular Virology, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Alicia Richards
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Gregory Potts
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Alexander Hebert
- Department of Biomolecular Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Nafisah Islam
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- Department of Computer Sciences, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Joshua J. Coon
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Department of Biomolecular Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
| | - Anthony Gitter
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- Department of Computer Sciences, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Department of Biostatistics and Medical Informatics, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Nathan Sherer
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Institute for Molecular Virology, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Paul Ahlquist
- John and Jeanne Rowe Center for Research in Virology, Morgridge Institute for Research, Madison, Wisconsin, United States of America
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Institute for Molecular Virology, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
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18
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Valdebenito S, Ono A, Rong L, Eugenin EA. The role of tunneling nanotubes during early stages of HIV infection and reactivation: implications in HIV cure. NEUROIMMUNE PHARMACOLOGY AND THERAPEUTICS 2023; 2:169-186. [PMID: 37476291 PMCID: PMC10355284 DOI: 10.1515/nipt-2022-0015] [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: 11/04/2022] [Accepted: 11/30/2022] [Indexed: 07/22/2023]
Abstract
Tunneling nanotubes (TNTs), also called cytonemes or tumor microtubes, correspond to cellular processes that enable long-range communication. TNTs are plasma membrane extensions that form tubular processes that connect the cytoplasm of two or more cells. TNTs are mostly expressed during the early stages of development and poorly expressed in adulthood. However, in disease conditions such as stroke, cancer, and viral infections such as HIV, TNTs proliferate, but their role is poorly understood. TNTs function has been associated with signaling coordination, organelle sharing, and the transfer of infectious agents such as HIV. Here, we describe the critical role and function of TNTs during HIV infection and reactivation, as well as the use of TNTs for cure strategies.
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Affiliation(s)
- Silvana Valdebenito
- Department of Neurobiology, University of Texas Medical Branch (UTMB), Galveston, TX, USA
| | - Akira Ono
- Department of Microbiology & Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Libin Rong
- Department of Mathematics, University of Florida, Gainesville, FL, USA
| | - Eliseo A. Eugenin
- Department of Neurobiology, University of Texas Medical Branch (UTMB), Galveston, TX, USA
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19
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Abstract
Acquired immunodeficiency syndrome (AIDS), caused by the human immunodeficiency virus (HIV), has become a heavy burden of disease and an important public health problem in the world. Although current antiretroviral therapy (ART) is effective at suppressing the virus in the blood, HIV still remains in two different types of reservoirs-the latently infected cells (represented by CD4+ T cells) and the tissues containing those cells, which may block access to ART, HIV-neutralizing antibodies and latency-reversing agents. The latter is the focus of our review, as blood viral load drops below detectable levels after ART, a deeper and more systematic understanding of the HIV tissue reservoirs is imperative. In this review, we take the lymphoid system (including lymph nodes, gut-associated lymphoid tissue, spleen and bone marrow), nervous system, respiratory system, reproductive system (divided into male and female), urinary system as the order, focusing on the particularity and importance of each tissue in HIV infection, the infection target cell types of each tissue, the specific infection situation of each tissue quantified by HIV DNA or HIV RNA and the evidence of compartmentalization and pharmacokinetics. In summary, we found that the present state of HIV in different tissues has both similarities and differences. In the future, the therapeutic principle we need to follow is to respect the discrepancy on the basis of grasping the commonality. The measures taken to completely eliminate the virus in the whole body cannot be generalized. It is necessary to formulate personalized treatment strategies according to the different characteristics of the HIV in the various tissues, so as to realize the prospect of curing AIDS as soon as possible.
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Affiliation(s)
- Kangpeng Li
- Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Bo Liu
- Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Rui Ma
- Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Qiang Zhang
- Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing, China
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20
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Rong SY, Guo T, Smith JT, Wang X. The role of cell-to-cell transmission in HIV infection: insights from a mathematical modeling approach. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:12093-12117. [PMID: 37501434 DOI: 10.3934/mbe.2023538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
HIV infection remains a serious global public health problem. Although current drug treatment is effective and can reduce plasma viral loads below the level of detection, it cannot eradicate the virus. The reasons for the low virus persistence despite long-term therapy have not been fully elucidated. In addition, multiple HIV infection, i.e., infection of a cell by multiple viruses, is common and can facilitate viral recombination and mutations, evading the immune system and conferring resistance to drug treatment. The mechanisms for multiple HIV infection formation and their respective contributions remain unclear. To answer these questions, we developed a mathematical modeling framework that encompasses cell-free viral infection and cell-to-cell spread. We fit sub-models that only have one transmission route and the full model containing both to the multi-infection data from HIV-infected patients, and show that the multi-infection data can only be reproduced if these two transmission routes are both considered. Computer simulations with the best-fitting parameter values indicate that cell-to-cell spread leads to the majority of multiple infection and also accounts for the majority of overall infection. Sensitivity analysis shows that cell-to-cell spread has reduced susceptibility to treatment and may explain low HIV persistence. Taken together, this work indicates that cell-to-cell spread plays a crucial role in the development of HIV multi-infection and low HIV persistence despite long-term therapy, and therefore has important implications for understanding HIV pathogenesis and developing more effective treatment strategies to control or even eliminate the disease.
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Affiliation(s)
| | - Ting Guo
- Aliyun School of Big Data, Changzhou University, Changzhou 213164, China
- Department of Mathematics, University of Florida, Gainesville, FL 32611, USA
| | - J Tyler Smith
- Department of Mathematics, University of Florida, Gainesville, FL 32611, USA
| | - Xia Wang
- School of Mathematics and Statistics, Xinyang Normal University, Xinyang 464000, China
- Department of Mathematics, University of Florida, Gainesville, FL 32611, USA
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21
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Xia S, Xiao W, Zhu X, Liao S, Guo J, Zhou J, Xiao S, Fang P, Fang L. Porcine deltacoronavirus resists antibody neutralization through cell-to-cell transmission. Emerg Microbes Infect 2023; 12:2207688. [PMID: 37125733 DOI: 10.1080/22221751.2023.2207688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Porcine deltacoronavirus (PDCoV) is an emerging enteric coronavirus that has been reported to infect a variety of animals and even humans. Cell-cell fusion has been identified as an alternative pathway for the cell-to-cell transmission of certain viruses, but the ability of PDCoV to exploit this transmission model, and the relevant mechanisms, have not been fully elucidated. Herein, we provide evidence that cell-to-cell transmission is the main mechanism supporting PDCoV spread in cell culture and that this efficient spread model is mediated by spike glycoprotein-driven cell-cell fusion. We found that PDCoV efficiently spread to non-susceptible cells via cell-to-cell transmission, and demonstrated that functional receptor porcine aminopeptidase N and cathepsins in endosomes are involved in the cell-to-cell transmission of PDCoV. Most importantly, compared with non-cell-to-cell infection, the cell-to-cell transmission of PDCoV was resistant to neutralizing antibodies and immune sera that potently neutralized free viruses. Taken together, our study revealed key characteristics of the cell-to-cell transmission of PDCoV and provided new insights into the mechanism of PDCoV infection.
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Affiliation(s)
- Sijin Xia
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Wenwen Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xuerui Zhu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Shusen Liao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Jiahui Guo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Junwei Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Puxian Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
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22
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Zhang J, Yang W, Roy S, Liu H, Roberts R, Wang L, Shi L, Ma W. Tight junction protein occludin is an internalization factor for SARS-CoV-2 infection and mediates virus cell-to-cell transmission. Proc Natl Acad Sci U S A 2023; 120:e2218623120. [PMID: 37068248 PMCID: PMC10151465 DOI: 10.1073/pnas.2218623120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 03/13/2023] [Indexed: 04/19/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spreads efficiently by spike-mediated, direct cell-to-cell transmission. However, the underlying mechanism is poorly understood. Herein, we demonstrate that the tight junction protein occludin (OCLN) is critical to this process. SARS-CoV-2 infection alters OCLN distribution and expression and causes syncytium formation that leads to viral spread. OCLN knockdown fails to alter SARS-CoV-2 binding but significantly lowers internalization, syncytium formation, and transmission. OCLN overexpression also has no effect on virus binding but enhances virus internalization, cell-to-cell transmission, and replication. OCLN directly interacts with the SARS-CoV-2 spike, and the endosomal entry pathway is involved in OCLN-mediated cell-to-cell fusion rather than in the cell surface entry pathway. All SARS-CoV-2 strains tested (prototypic, alpha, beta, gamma, delta, kappa, and omicron) are dependent on OCLN for cell-to-cell transmission, although the extent of syncytium formation differs between strains. We conclude that SARS-CoV-2 utilizes OCLN as an internalization factor for cell-to-cell transmission.
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Affiliation(s)
- Jialin Zhang
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - Wenyu Yang
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - Sawrab Roy
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - Heidi Liu
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - R. Michael Roberts
- Division of Animal Sciences, College of Agriculture, Food, & Natural Resources, University of Missouri, Columbia, MO65211
- Christopher S Bond Life Sciences Center, University of Missouri, Columbia, MO65211
| | - Liping Wang
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - Lei Shi
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
| | - Wenjun Ma
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO65211
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO65211
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23
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Pasternak AO, Berkhout B. HIV persistence: silence or resistance? Curr Opin Virol 2023; 59:101301. [PMID: 36805974 DOI: 10.1016/j.coviro.2023.101301] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/05/2022] [Accepted: 12/19/2022] [Indexed: 02/19/2023]
Abstract
Despite decades of suppressive antiretroviral therapy, human immunodeficiency virus (HIV) reservoirs in infected individuals persist and fuel viral rebound once therapy is interrupted. The persistence of viral reservoirs is the main obstacle to achieving HIV eradication or a long-term remission. The last decade has seen a profound change in our understanding of the mechanisms behind HIV persistence, which appears to be much more complex than originally assumed. In addition to the persistence of transcriptionally silent proviruses in a stable latent reservoir that is invisible to the immune system, HIV is increasingly recognized to persist by resistance to the immune clearance, which appears to play a surprisingly prominent role in shaping the reservoir. In this review, we discuss some emerging insights into the mechanisms of HIV persistence, as well as their implications for the development of strategies towards an HIV cure.
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Affiliation(s)
- Alexander O Pasternak
- Laboratory of Experimental Virology, Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands.
| | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
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24
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Lowen AC, Ferreri LM. Exclusion of latecomers yields a patchwork of viral subpopulations within hosts. PLoS Biol 2023; 21:e3001994. [PMID: 36848649 PMCID: PMC9910647 DOI: 10.1371/journal.pbio.3001994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
Viruses arriving late to an individual cell are blocked from replicating, an effect called superinfection exclusion. A study in PLOS Biology indicates that this exclusion at the level of individual cells gives rise to a heterogenous landscape of infection within a host.
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Affiliation(s)
- Anice C. Lowen
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Lucas M. Ferreri
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
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25
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Interleukin-27 Promotes Divergent Effects on HIV-1 Infection in Peripheral Blood Mononuclear Cells through BST-2/Tetherin. J Virol 2023; 97:e0175222. [PMID: 36602368 PMCID: PMC9888194 DOI: 10.1128/jvi.01752-22] [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] [Indexed: 01/06/2023] Open
Abstract
Interleukin-27 (IL-27) is able to inhibit HIV-1 replication in peripheral blood mononuclear cells (PBMCs), macrophages, and dendritic cells. Here, we identify that IL-27 can produce opposing effects on HIV-1 replication in PBMCs and that the HIV-1 restriction factor BST-2/Tetherin is involved in both inhibitory and enhancing effects on HIV-1 infection induced by IL-27. IL-27 inhibited HIV-1 replication when added to cells 2 h after infection, promoting the prototypical BST-2/Tetherin-induced virion accumulation at the cell membrane of HIV-1-infected PBMCs. BST-2/Tetherin gene expression was significantly upregulated in the IL-27-treated PBMCs, with a simultaneous increase in the number of BST-2/Tetherin+ cells. The silencing of BST-2/Tetherin diminished the anti-HIV-1 effect of IL-27. In contrast, IL-27 increased HIV-1 production when added to infected cells 4 days after infection. This enhancing effect was prevented by BST-2/Tetherin gene knockdown, which also permitted IL-27 to function again as an HIV-1 inhibitory factor. These contrasting roles of IL-27 were associated with the dynamic of viral production, since the IL-27-mediated enhancement of virus replication was prevented by antiretroviral treatment of infected cells, as well as by keeping cells under agitation to avoid cell-to-cell contact. Likewise, inhibition of CD11a, an integrin associated with HIV-1 cell-to-cell transmission, abrogated the IL-27 enhancement of HIV-1 production. Our findings illustrate the complexity of the HIV-1-host interactions and may impact the potential therapeutic use of IL-27 and other soluble mediators that induce BST-2/Tetherin expression for HIV-1 infection. IMPORTANCE Here, we describe new findings related to the ability of the cytokine IL-27 to regulate the growth of HIV-1 in CD4+ T lymphocytes. IL-27 has long been considered a potent inhibitor of HIV-1 replication, a notion based on several reports showing that this cytokine controls HIV-1 infection in peripheral blood mononuclear cells (PBMCs), monocyte-derived macrophages, and dendritic cells. However, our present results are contrary to the current knowledge that IL-27 acts only as a powerful downregulator of HIV-1 replication. We observed that IL-27 can either prevent or enhance viral growth in PBMCs, an outcome dependent on when this cytokine is added to the infected cells. We detected that the increase of HIV-1 dissemination is due to enhanced cell-to-cell transmission with the involvement of the interferon-induced HIV-1 restriction factor BST-2/Tetherin and CD11a (LFA-1), an integrin that participates in formation of virological synapse.
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26
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Deng J, Shu H, Wang L, Wang XS. Viral dynamics with immune responses: effects of distributed delays and Filippov antiretroviral therapy. J Math Biol 2023; 86:37. [PMID: 36695964 DOI: 10.1007/s00285-023-01869-w] [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: 07/15/2022] [Revised: 10/17/2022] [Accepted: 01/06/2023] [Indexed: 01/26/2023]
Abstract
In this paper, we propose a general viral infection model to incorporate two infection modes (virus-to-cell mode and cell-to-cell mode), the CTL immune response, and the distributed intracellular delays during the processes of viral infection, viral production, and CTLs recruitment. We investigate the existence, the uniqueness, and the global stability of three equilibria: infection-free equilibrium [Formula: see text], immune-inactivated equilibrium [Formula: see text] and immune-activated equilibrium [Formula: see text], respectively. We prove that the viral dynamics are determined by two threshold parameters: the basic reproduction number for infection [Formula: see text] and the basic reproduction number for immune response [Formula: see text]. We also numerically explore the viral dynamics beyond stability. We use bifurcation diagrams to show that increasing the delay in CTL immune cell recruitment can induce a switch in viral load from a stable constant level to sustained oscillations, and then back to a stable equilibrium. We also compare the contributions of the two infection modes to the total infection level and identify the key parameters that would affect the percentages of virus-to-cell infection and cell-to-cell infection. Finally, we explore how Filippov control can be applied in antiretroviral therapy to reduce the viral loads.
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Affiliation(s)
- Jiawei Deng
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, 710062, People's Republic of China
| | - Hongying Shu
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, 710062, People's Republic of China.
| | - Lin Wang
- Department of Mathematics and Statistics, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada
| | - Xiang-Sheng Wang
- Department of Mathematics, University of Louisiana at Lafayette, Lafayette, LA, 70503, USA
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27
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Wang Y, Liu J, Zhang X, Heffernan JM. An HIV stochastic model with cell-to-cell infection, B-cell immune response and distributed delay. J Math Biol 2023; 86:35. [PMID: 36695912 DOI: 10.1007/s00285-022-01863-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 12/07/2022] [Accepted: 12/15/2022] [Indexed: 01/26/2023]
Abstract
In this study, a delayed HIV stochastic model with virus-to-cell infection, cell-to-cell transmission and B-cell immune response is proposed. We first transform the stochastic differential equation with distributed delay into a high-dimensional degenerate stochastic differential equation, and then theoretically analyze the dynamic behaviour of the degenerate model. The unique global solution of the model is given by rigorous analysis. By formulating suitable Lyapunov functions, the existence of the stationary Markov process is obtained if the stochastic B-cell-activated reproduction number is greater than one. We also use the law of large numbers theorem and the spectral radius analysis method to deduce that the virus can be cleared if the stochastic B-cell-inactivated reproduction number is less than one. Through uncertainty and sensitivity analysis, we obtain key parameters that determine the value of the stochastic B-cell-activated reproduction number. Numerically, we examine that low level noise can maintain the number of the virus and B-cell populations at a certain range, while high level noise is helpful for the elimination of the virus. Furthermore, the effect of the cell-to-cell infection on model behaviour, and the influence of the key parameters on the size of the stochastic B-cell-activated reproduction number are also investigated.
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Affiliation(s)
- Yan Wang
- College of Science, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Jun Liu
- College of Science, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Xinhong Zhang
- College of Science, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Jane M Heffernan
- Modelling Infection and Immunity Lab, Centre for Disease Modelling, Department of Mathematics and Statistics, York University, Toronto, M3J 1P3, Canada.
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28
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Deng J, Jiang P, Shu H. Viral infection dynamics with mitosis, intracellular delays and immune response. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:2937-2963. [PMID: 36899566 DOI: 10.3934/mbe.2023139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In this paper, we propose a delayed viral infection model with mitosis of uninfected target cells, two infection modes (virus-to-cell transmission and cell-to-cell transmission), and immune response. The model involves intracellular delays during the processes of viral infection, viral production, and CTLs recruitment. We verify that the threshold dynamics are determined by the basic reproduction number $ R_0 $ for infection and the basic reproduction number $ R_{IM} $ for immune response. The model dynamics become very rich when $ R_{IM} > 1 $. In this case, we use the CTLs recruitment delay $ \tau_3 $ as the bifurcation parameter to obtain stability switches on the positive equilibrium and global Hopf bifurcation diagrams for the model system. This allows us to show that $ \tau_3 $ can lead to multiple stability switches, the coexistence of multiple stable periodic solutions, and even chaos. A brief simulation of two-parameter bifurcation analysis indicates that both the CTLs recruitment delay $ \tau_3 $ and the mitosis rate $ r $ have a strong impact on the viral dynamics, but they do behave differently.
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Affiliation(s)
- Jiawei Deng
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an 710062, China
| | - Ping Jiang
- School of Management, Shanghai University of International Business and Economics, Shanghai 201620, China
| | - Hongying Shu
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an 710062, China
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29
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Wu Y. HIV Preintegration Transcription and Host Antagonism. Curr HIV Res 2023; 21:160-171. [PMID: 37345240 PMCID: PMC10661980 DOI: 10.2174/1570162x21666230621122637] [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: 04/21/2023] [Revised: 05/25/2023] [Accepted: 06/08/2023] [Indexed: 06/23/2023]
Abstract
Retrovirus integration is an obligatory step for the viral life cycle, but large amounts of unintegrated DNA (uDNA) accumulate during retroviral infection. For simple retroviruses, in the absence of integration, viral genomes are epigenetically silenced in host cells. For complex retroviruses such as HIV, preintegration transcription has been found to occur at low levels from a large population of uDNA even in the presence of host epigenetic silencing mechanisms. HIV preintegration transcription has been suggested to be a normal early process of HIV infection that leads to the syntheses of all three classes of viral transcripts: multiply-spliced, singly-spliced, and unspliced genomic RNA; only viral early proteins such as Nef are selectively translated at low levels in blood CD4 T cells and macrophages, the primary targets of HIV. The initiation and persistence of HIV preintegration transcription have been suggested to rely on viral accessory proteins, particularly virion Vpr and de novo Tat generated from uDNA; both proteins have been shown to antagonize host epigenetic silencing of uDNA. In addition, stimulation of latently infected resting T cells and macrophages with cytokines, PKC activator, or histone deacetylase inhibitors has been found to greatly upregulate preintegration transcription, leading to low-level viral production or even replication from uDNA. Functionally, Nef synthesized from preintegration transcription is biologically active in modulating host immune functions, lowering the threshold of T cell activation, and downregulating surface CD4, CXCR4/CCR5, and HMC receptors. The early Tat activity from preintegration transcription antagonizes repressive minichromatin assembled onto uDNA. The study of HIV preintegration transcription is important to understanding virus-host interaction and antagonism, viral persistence, and the mechanism of integrase drug resistance. The application of unintegrated lentiviral vectors for gene therapy also offers a safety advantage for minimizing retroviral vector-mediated insertional mutagenesis.
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Affiliation(s)
- Yuntao Wu
- Center for Infectious Disease Research, George Mason University, Manassas, Virginia, United States
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30
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Towards a new combination therapy with vectored immunoprophylaxis for HIV: Modeling "shock and kill" strategy. Math Biosci 2023; 355:108954. [PMID: 36525996 DOI: 10.1016/j.mbs.2022.108954] [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: 03/15/2022] [Revised: 09/23/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022]
Abstract
Latently infected cells are considered as a major barrier to curing Human Immunodeficiency Virus (HIV) infection. Reactivation of latently infected cells followed by killing the actively infected cells may be a potential strategy ("shock and kill") to purge the latent reservoir. Based on vectored immunoprophylaxis (VIP) experiment that can elicit bNAbs, in this paper a mathematical model is formulated to explore the efficacy of "shock and kill" strategy with VIP. We derive the basic reproduction number R0 of the model and show that R0 completely determines the dynamics of the model: if R0<1, the disease-free equilibrium is globally asymptotically stable; if R0>1, the system is uniformly persistent. Numerical simulations suggest that the "shock and kill" strategy with VIP can effectively control HIV infection while this strategy cannot eradicate the reservoir without VIP although it can alleviate the HIV infection. To model the administration of drugs and vaccine more realistically, pharmacokinetics and pulse vaccination are incorporated into the model of ordinary differential equations. The resultants are described by impulsive differential equations. The thresholds are obtained for the frequency and strength of the vaccination to eliminate the viruses. Furthermore, the most appropriate times are numerically investigated for starting a short-term latency-reversing agents (LRAs) treatment relative to ART considering the toxicity of LRAs. The results show that LRAs treatment at the beginning of ART might be a better option. These results have important implications for the design of HIV cure-related clinical trials.
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31
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Fernandez-de Céspedes MV, Hoffman HK, Carter H, Simons LM, Naing L, Ablan SD, Scheiblin DA, Hultquist JF, van Engelenburg SB, Freed EO. Rab11-FIP1C Is Dispensable for HIV-1 Replication in Primary CD4 + T Cells, but Its Role Is Cell Type Dependent in Immortalized Human T-Cell Lines. J Virol 2022; 96:e0087622. [PMID: 36354340 PMCID: PMC9749476 DOI: 10.1128/jvi.00876-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/11/2022] [Indexed: 11/12/2022] Open
Abstract
The HIV-1 envelope glycoprotein (Env) contains a long cytoplasmic tail harboring highly conserved motifs that direct Env trafficking and incorporation into virions and promote efficient virus spread. The cellular trafficking factor Rab11a family interacting protein 1C (FIP1C) has been implicated in the directed trafficking of Env to sites of viral assembly. In this study, we confirm that small interfering RNA (siRNA)-mediated depletion of FIP1C in HeLa cells modestly reduces Env incorporation into virions. To determine whether FIP1C is required for Env incorporation and HIV-1 replication in physiologically relevant cells, CRISPR-Cas9 technology was used to knock out the expression of this protein in several human T-cell lines-Jurkat E6.1, SupT1, and H9-and in primary human CD4+ T cells. FIP1C knockout caused modest reductions in Env incorporation in SupT1 cells but did not inhibit virus replication in SupT1 or Jurkat E6.1 T cells. In H9 cells, FIP1C knockout caused a cell density-dependent defect in virus replication. In primary CD4+ T cells, FIP1C knockout had no effect on HIV-1 replication. Furthermore, human T-cell leukemia virus type 1 (HTLV-1)-transformed cell lines that are permissive for HIV-1 replication do not express FIP1C. Mutation of an aromatic motif in the Env cytoplasmic tail (Y795W) implicated in FIP1C-mediated Env incorporation impaired virus replication independently of FIP1C expression in SupT1, Jurkat E6.1, H9, and primary T cells. Together, these results indicate that while FIP1C may contribute to HIV-1 Env incorporation in some contexts, additional and potentially redundant host factors are likely required for Env incorporation and virus dissemination in T cells. IMPORTANCE The incorporation of the HIV-1 envelope (Env) glycoproteins, gp120 and gp41, into virus particles is critical for virus infectivity. gp41 contains a long cytoplasmic tail that has been proposed to interact with host cell factors, including the trafficking factor Rab11a family interacting protein 1C (FIP1C). To investigate the role of FIP1C in relevant cell types-human T-cell lines and primary CD4+ T cells-we used CRISPR-Cas9 to knock out FIP1C expression and examined the effect on HIV-1 Env incorporation and virus replication. We observed that in two of the T-cell lines examined (Jurkat E6.1 and SupT1) and in primary CD4+ T cells, FIP1C knockout did not disrupt HIV-1 replication, whereas FIP1C knockout reduced Env expression and delayed replication in H9 cells. The results indicate that while FIP1C may contribute to Env incorporation in some cell lines, it is not an essential factor for efficient HIV-1 replication in primary CD4+ T cells.
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Affiliation(s)
| | | | - Hannah Carter
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA
| | - Lacy M. Simons
- Division of Infectious Diseases, Center for Pathogen Genomics and Microbial Evolution, Havey Institute for Global Health, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Lwar Naing
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA
| | - Sherimay D. Ablan
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA
| | - David A. Scheiblin
- Optical Microscopy and Analysis Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Judd F. Hultquist
- Division of Infectious Diseases, Center for Pathogen Genomics and Microbial Evolution, Havey Institute for Global Health, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | | | - Eric O. Freed
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA
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32
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Lustig G, Ganga Y, Rodel H, Tegally H, Jackson L, Cele S, Khan K, Jule Z, Reedoy K, Karim F, Bernstein M, Moosa MYS, Archary D, de Oliveira T, Lessells R, Abdool Karim SS, Sigal A. SARS-CoV-2 evolves increased infection elicited cell death and fusion in an immunosuppressed individual. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2022:2022.11.23.22282673. [PMID: 36451879 PMCID: PMC9709797 DOI: 10.1101/2022.11.23.22282673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The milder clinical manifestations of Omicron infection relative to pre-Omicron SARS CoV-2 raises the possibility that extensive evolution results in reduced pathogenicity. To test this hypothesis, we quantified induction of cell fusion and cell death in SARS CoV-2 evolved from ancestral virus during long-term infection. Both cell fusion and death were reduced in Omicron BA.1 infection relative to ancestral virus. Evolved virus was isolated at different times during a 6-month infection in an immunosuppressed individual with advanced HIV disease. The virus isolated 16 days post-reported symptom onset induced fusogenicity and cell death at levels similar to BA.1. However, fusogenicity was increased in virus isolated at 6 months post-symptoms to levels intermediate between BA.1 and ancestral SARS-CoV-2. Similarly, infected cell death showed a graded increase from earlier to later isolates. These results may indicate that, at least by the cellular measures used here, evolution in long-term infection does not necessarily attenuate the virus.
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Affiliation(s)
- Gila Lustig
- Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
| | - Yashica Ganga
- Africa Health Research Institute, Durban, South Africa
| | - Hylton Rodel
- Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
- Division of Infection and Immunity, University College London, London, UK
| | - Houriiyah Tegally
- KwaZulu-Natal Research Innovation and Sequencing Platform, Durban, South Africa
| | | | - Sandile Cele
- Africa Health Research Institute, Durban, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Khadija Khan
- Africa Health Research Institute, Durban, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Zesuliwe Jule
- Africa Health Research Institute, Durban, South Africa
| | - Kajal Reedoy
- Africa Health Research Institute, Durban, South Africa
| | - Farina Karim
- Africa Health Research Institute, Durban, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | | | - Mahomed-Yunus S Moosa
- Department of Infectious Diseases, Nelson R. Mandela School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - Derseree Archary
- Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
| | - Tulio de Oliveira
- KwaZulu-Natal Research Innovation and Sequencing Platform, Durban, South Africa
- Centre for Epidemic Response and Innovation (CERI), School of Data Science and Computational Thinking, Stellenbosch University, Stellenbosch, South Africa
- Department of Global Health, University of Washington, Seattle, USA
| | - Richard Lessells
- KwaZulu-Natal Research Innovation and Sequencing Platform, Durban, South Africa
| | - Salim S Abdool Karim
- Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, United States
| | - Alex Sigal
- Centre for the AIDS Programme of Research in South Africa, Durban, South Africa
- Africa Health Research Institute, Durban, South Africa
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
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Han M, Woottum M, Mascarau R, Vahlas Z, Verollet C, Benichou S. Mechanisms of HIV-1 cell-to-cell transfer to myeloid cells. J Leukoc Biol 2022; 112:1261-1271. [PMID: 35355323 DOI: 10.1002/jlb.4mr0322-737r] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/09/2022] [Indexed: 12/24/2022] Open
Abstract
In addition to CD4+ T lymphocytes, cells of the myeloid lineage such as macrophages, dendritic cells (DCs), and osteoclasts (OCs) are emerging as important target cells for HIV-1, as they likely participate in all steps of pathogenesis, including sexual transmission and early virus dissemination in both lymphoid and nonlymphoid tissues where they can constitute persistent virus reservoirs. At least in vitro, these myeloid cells are poorly infected by cell-free viral particles. In contrast, intercellular virus transmission through direct cell-to-cell contacts may be a predominant mode of virus propagation in vivo leading to productive infection of these myeloid target cells. HIV-1 cell-to-cell transfer between CD4+ T cells mainly through the formation of the virologic synapse, or from infected macrophages or dendritic cells to CD4+ T cell targets, have been extensively described in vitro. Recent reports demonstrate that myeloid cells can be also productively infected through virus homotypic or heterotypic cell-to-cell transfer between macrophages or from virus-donor-infected CD4+ T cells, respectively. These modes of infection of myeloid target cells lead to very efficient spreading in these poorly susceptible cell types. Thus, the goal of this review is to give an overview of the different mechanisms reported in the literature for cell-to-cell transfer and spreading of HIV-1 in myeloid cells.
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Affiliation(s)
- Mingyu Han
- Institut Cochin, Inserm U1016, Paris, France.,Centre National de la Recherche Scientifique CNRS UMR8104, Paris, France.,Faculty of Health, University of Paris Cité, Paris, France
| | - Marie Woottum
- Institut Cochin, Inserm U1016, Paris, France.,Centre National de la Recherche Scientifique CNRS UMR8104, Paris, France.,Faculty of Health, University of Paris Cité, Paris, France
| | - Rémi Mascarau
- Institut de Pharmacologie et Biologie Structurale, IPBS, Université de Toulouse, CNRS, Toulouse, France.,International Research Project (IRP) CNRS, Toulouse, France.,International Research Project (IRP), CNRS, Buenos Aires, Argentina
| | - Zoï Vahlas
- Institut de Pharmacologie et Biologie Structurale, IPBS, Université de Toulouse, CNRS, Toulouse, France.,International Research Project (IRP) CNRS, Toulouse, France.,International Research Project (IRP), CNRS, Buenos Aires, Argentina
| | - Christel Verollet
- Institut de Pharmacologie et Biologie Structurale, IPBS, Université de Toulouse, CNRS, Toulouse, France.,International Research Project (IRP) CNRS, Toulouse, France.,International Research Project (IRP), CNRS, Buenos Aires, Argentina
| | - Serge Benichou
- Institut Cochin, Inserm U1016, Paris, France.,Centre National de la Recherche Scientifique CNRS UMR8104, Paris, France.,Faculty of Health, University of Paris Cité, Paris, France
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A clinical review of HIV integrase strand transfer inhibitors (INSTIs) for the prevention and treatment of HIV-1 infection. Retrovirology 2022; 19:22. [PMID: 36273165 PMCID: PMC9588231 DOI: 10.1186/s12977-022-00608-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 09/26/2022] [Indexed: 12/13/2022] Open
Abstract
Integrase strand transfer inhibitors (INSTIs) have improved the treatment of human immunodeficiency virus (HIV). There are currently four approved for use in treatment-naïve individuals living with HIV; these include first generation raltegravir, elvitegravir, and second generation dolutegravir and bictegravir. The most recent INSTI, cabotegravir, is approved for (1) treatment of HIV infection in adults to replace current antiretroviral therapy in individuals who maintain virologic suppression on a stable antiretroviral regimen without history of treatment failure and no known resistance to its components and (2) pre-exposure prophylaxis in individuals at risk of acquiring HIV-1 infection. Cabotegravir can be administered intramuscularly as a monthly or bi-monthly injection depending on the indication. This long-acting combination has been associated with treatment satisfaction in clinical studies and may be helpful for individuals who have difficulty taking daily oral medications. Worldwide, second generation INSTIs are preferred for treatment-naïve individuals. Advantages of these INSTIs include their high genetic barrier to resistance, limited drug-drug interactions, excellent rates of virologic suppression, and favorable tolerability. Few INSTI resistance-associated mutations have been reported in clinical trials involving dolutegravir, bictegravir and cabotegravir. Other advantages of specific INSTIs include their use in various populations such as infants and children, acute HIV infection, and individuals of childbearing potential. The most common adverse events observed in clinical studies involving INSTIs included diarrhea, nausea, insomnia, fatigue, and headache, with very low rates of treatment discontinuation versus comparator groups. The long-term clinical implications of weight gain associated with second generation INSTIs dolutegravir and bictegravir warrants further study. This review summarizes key clinical considerations of INSTIs in terms of clinical pharmacology, drug-drug interactions, resistance, and provides perspective on clinical decision-making. Additionally, we summarize major clinical trials evaluating the efficacy and safety of INSTIs in treatment-naïve patients living with HIV as well as individuals at risk of acquiring HIV infection.
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Adams P, Berkhout B, Pasternak AO. Towards a molecular profile of antiretroviral therapy-free HIV remission. Curr Opin HIV AIDS 2022; 17:301-307. [PMID: 35938464 DOI: 10.1097/coh.0000000000000749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To summarize the current status and highlight recent findings on predictive biomarkers for posttreatment HIV control (PTC) and virological remission. While historically, many studies focused on virological markers, there is an increasing tendency to enter immune and metabolic factors into the equation. RECENT FINDINGS On the virological side, several groups reported that cell-associated HIV RNA could predict time to viral rebound. Recent data hints at the possible importance of the genic location and chromatin context of the integrated provirus, although these factors still need to be assessed in relation to PTC and virological remission. Evidence from immunological studies highlighted innate and humoral immunity as important factors for prolonged HIV remission. Interestingly, novel metabolic markers have emerged, which offer additional angles to our understanding of latency and viral rebound. SUMMARY Facilitating PTC and virological remission remain top priorities for the HIV cure research. We advocate for clear and precise definitions for both phenomena in order to avoid misconceptions and to strengthen the conclusions that can be drawn. As no one-size-fits-all marker has emerged yet, more biomarkers are on the horizon, and viral rebound is a complex and heterogeneous process, it is likely that a combination of various biomarkers in cohesion will be necessary for a more accurate prediction of antiretroviral therapy-free HIV remission.
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Affiliation(s)
- Philipp Adams
- Laboratory of Experimental Virology, Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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Ambikan AT, Svensson-Akusjärvi S, Krishnan S, Sperk M, Nowak P, Vesterbacka J, Sönnerborg A, Benfeitas R, Neogi U. Genome-scale metabolic models for natural and long-term drug-induced viral control in HIV infection. Life Sci Alliance 2022; 5:e202201405. [PMID: 35537851 PMCID: PMC9095731 DOI: 10.26508/lsa.202201405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/02/2022] [Accepted: 05/02/2022] [Indexed: 12/21/2022] Open
Abstract
Genome-scale metabolic models (GSMMs) can provide novel insights into metabolic reprogramming during disease progression and therapeutic interventions. We developed a context-specific system-level GSMM of people living with HIV (PLWH) using global RNA sequencing data from PBMCs with suppressive viremia either by natural (elite controllers, PLWHEC) or drug-induced (PLWHART) control. This GSMM was compared with HIV-negative controls (HC) to provide a comprehensive systems-level metabo-transcriptomic characterization. Transcriptomic analysis identified up-regulation of oxidative phosphorylation as a characteristic of PLWHART, differentiating them from PLWHEC with dysregulated complexes I, III, and IV. The flux balance analysis identified altered flux in several intermediates of glycolysis including pyruvate, α-ketoglutarate, and glutamate, among others, in PLWHART The in vitro pharmacological inhibition of OXPHOS complexes in a latent lymphocytic cell model (J-Lat 10.6) suggested a role for complex IV in latency reversal and immunosenescence. Furthermore, inhibition of complexes I/III/IV induced apoptosis, collectively indicating their contribution to reservoir dynamics.
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Affiliation(s)
- Anoop T Ambikan
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Sara Svensson-Akusjärvi
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Shuba Krishnan
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Maike Sperk
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Piotr Nowak
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
- Department of Medicine, Huddinge (MedH), Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Jan Vesterbacka
- Department of Medicine, Huddinge (MedH), Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Anders Sönnerborg
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
- Department of Medicine, Huddinge (MedH), Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Rui Benfeitas
- National Bioinformatics Infrastructure Sweden (NBIS), Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Ujjwal Neogi
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
- Manipal Institute of Virology (MIV), Manipal Academy of Higher Education, Manipal, Karnataka, India
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AlShamrani NH, Alshaikh MA, Elaiw AM, Hattaf K. Dynamics of HIV-1/HTLV-I Co-Infection Model with Humoral Immunity and Cellular Infection. Viruses 2022; 14:v14081719. [PMID: 36016341 PMCID: PMC9415130 DOI: 10.3390/v14081719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/30/2022] [Accepted: 07/30/2022] [Indexed: 12/04/2022] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1) and human T-lymphotropic virus type I (HTLV-I) are two retroviruses which infect the same target, CD4+ T cells. This type of cell is considered the main component of the immune system. Since both viruses have the same means of transmission between individuals, HIV-1-infected patients are more exposed to the chance of co-infection with HTLV-I, and vice versa, compared to the general population. The mathematical modeling and analysis of within-host HIV-1/HTLV-I co-infection dynamics can be considered a robust tool to support biological and medical research. In this study, we have formulated and analyzed an HIV-1/HTLV-I co-infection model with humoral immunity, taking into account both latent HIV-1-infected cells and HTLV-I-infected cells. The model considers two modes of HIV-1 dissemination, virus-to-cell (V-T-C) and cell-to-cell (C-T-C). We prove the nonnegativity and boundedness of the solutions of the model. We find all steady states of the model and establish their existence conditions. We utilize Lyapunov functions and LaSalle’s invariance principle to investigate the global stability of all the steady states of the model. Numerical simulations were performed to illustrate the corresponding theoretical results. The effects of humoral immunity and C-T-C transmission on the HIV-1/HTLV-I co-infection dynamics are discussed. We have shown that humoral immunity does not play the role of clearing an HIV-1 infection but it can control HIV-1 infection. Furthermore, we note that the omission of C-T-C transmission from the HIV-1/HTLV-I co-infection model leads to an under-evaluation of the basic HIV-1 mono-infection reproductive ratio.
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Affiliation(s)
- Noura H. AlShamrani
- Department of Mathematics, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Matuka A. Alshaikh
- Department of Mathematics, College of Science, Taif University, P.O. Box 11099, Taif 21974, Saudi Arabia
| | - Ahmed M. Elaiw
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
- Department of Mathematics, Faculty of Science, Al-Azhar University, Assiut Branch, Assiut 71524, Egypt
- Correspondence: or
| | - Khalid Hattaf
- Equipe de Recherche en Modélisation et Enseignement des Mathématiques (ERMEM), Centre Régional des Métiers de l’Education et de la Formation (CRMEF), Derb Ghalef, Casablanca 20340, Morocco
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38
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Bradshaw D, Taylor GP. HTLV-1 Transmission and HIV Pre-exposure Prophylaxis: A Scoping Review. Front Med (Lausanne) 2022; 9:881547. [PMID: 35572998 PMCID: PMC9103472 DOI: 10.3389/fmed.2022.881547] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/22/2022] [Indexed: 11/24/2022] Open
Abstract
HIV pre-exposure prophylaxis (HIV-PrEP) is effective in reducing the likelihood of HIV acquisition in HIV-negative people at high risk of exposure. Guidelines recommend testing for sexually transmitted infections (STIs) before starting, and periodically on PrEP, including bacterial infections, HIV, hepatitis C virus, and, for those who are non-immune, hepatitis B virus. Diagnosed infections can be promptly treated to reduce onward transmission. HTLV-1 is not mentioned; however, it is predominantly sexually transmitted, causes adult T-cell leukaemia/lymphoma (ATL) or myelopathy in 10% of those infected, and is associated with an increased risk of death in those without any classically HTLV-associated condition. The 2021 WHO Technical Report on HTLV-1 called for the strengthening of global public health measures against its spread. In this scoping review, we, therefore, (1) discuss the epidemiological context of HIV-PrEP and HTLV-1 transmission; (2) present current knowledge of antiretrovirals in relation to HTLV-1 transmission prevention, including nucleos(t)ide reverse transcriptase inhibitors (NRTIs) and integrase strand transfer inhibitors (INSTIs); and (3) identify knowledge gaps where data are urgently required to inform global public health measures to protect HIV-PrEP users from HTLV-1 acquisition. We suggest that systematic seroprevalence studies among PrEP-using groups, including men who have sex with men (MSM), people who inject drugs (PWIDs), and female sex workers (FSWs), are needed. Further data are required to evaluate antiretroviral efficacy in preventing HTLV-1 transmission from in vitro studies, animal models, and clinical cohorts. PrEP delivery programmes should consider prioritizing the long-acting injectable INSTI, cabotegravir, in HTLV-1 endemic settings.
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Affiliation(s)
- Daniel Bradshaw
- Virus Reference Department, UK Health Security Agency, London, United Kingdom
- National Centre for Human Retrovirology, Imperial College Healthcare NHS Trust, London, United Kingdom
- *Correspondence: Daniel Bradshaw
| | - Graham Philip Taylor
- National Centre for Human Retrovirology, Imperial College Healthcare NHS Trust, London, United Kingdom
- Imperial College London, London, United Kingdom
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Abstract
The HIV Env glycoprotein is the surface glycoprotein responsible for viral entry into CD4+ immune cells. During infection, Env also serves as a primary target for antibody responses, which are robust but unable to control virus replication. Immune evasion by HIV-1 Env appears to employ complex mechanisms to regulate what antigenic states are presented to the immune system. Immunodominant features appear to be distinct from epitopes that interfere with Env functions in mediating infection. Further, cell-cell transmission studies indicate that vulnerable conformational states are additionally hidden from recognition on infected cells, even though the presence of Env at the cell surface is required for viral infection through the virological synapse. Cell-cell infection studies support that Env on infected cells is presented in distinct conformations from that on virus particles. Here we review data regarding the regulation of conformational states of Env and assess how regulated sorting of Env within the infected cell may underlie mechanisms to distinguish Env on the surface of virus particles versus Env on the surface of infected cells. These mechanisms may allow infected cells to avoid opsonization, providing cell-to-cell infection by HIV with a selective advantage during evolution within an infected individual. Understanding how distinct Env conformations are presented on cells versus viruses may be essential to designing effective vaccine approaches and therapeutic strategies to clear infected cell reservoirs.
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Affiliation(s)
- Connie Zhao
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Hongru Li
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Talia H. Swartz
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Benjamin K. Chen
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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40
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Kumata R, Iwanami S, Mar KB, Kakizoe Y, Misawa N, Nakaoka S, Koyanagi Y, Perelson AS, Schoggins JW, Iwami S, Sato K. Antithetic effect of interferon-α on cell-free and cell-to-cell HIV-1 infection. PLoS Comput Biol 2022; 18:e1010053. [PMID: 35468127 PMCID: PMC9037950 DOI: 10.1371/journal.pcbi.1010053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 03/23/2022] [Indexed: 01/23/2023] Open
Abstract
In HIV-1-infected individuals, transmitted/founder (TF) virus contributes to establish new infection and expands during the acute phase of infection, while chronic control (CC) virus emerges during the chronic phase of infection. TF viruses are more resistant to interferon-alpha (IFN-α)-mediated antiviral effects than CC virus, however, its virological relevance in infected individuals remains unclear. Here we perform an experimental-mathematical investigation and reveal that IFN-α strongly inhibits cell-to-cell infection by CC virus but only weakly affects that by TF virus. Surprisingly, IFN-α enhances cell-free infection of HIV-1, particularly that of CC virus, in a virus-cell density-dependent manner. We further demonstrate that LY6E, an IFN-stimulated gene, can contribute to the density-dependent enhancement of cell-free HIV-1 infection. Altogether, our findings suggest that the major difference between TF and CC viruses can be explained by their resistance to IFN-α-mediated inhibition of cell-to-cell infection and their sensitivity to IFN-α-mediated enhancement of cell-free infection.
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Affiliation(s)
- Ryuichi Kumata
- Division of Systems Virology, Department of Infectious Disease Control, International Research Center for Infectious Diseases, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Laboratory of Systems Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Faculty of Science, Kyoto University, Kyoto, Japan
| | - Shoya Iwanami
- interdisciplinary Biology Laboratory (iBLab), Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Katrina B. Mar
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Yusuke Kakizoe
- Mathematical Biology Laboratory, Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka, Japan
| | - Naoko Misawa
- Laboratory of Systems Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Shinji Nakaoka
- Laboratory of Mathematical Biology, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Japan
- PRESTO, Japan Science and Technology Agency, Saitama, Japan
| | - Yoshio Koyanagi
- Laboratory of Systems Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Alan S. Perelson
- Theoretical Biology and Biophysics, Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America
| | - John W. Schoggins
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Shingo Iwami
- interdisciplinary Biology Laboratory (iBLab), Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
- CREST, Japan Science and Technology Agency, Saitama, Japan
- MIRAI, Japan Science and Technology Agency, Saitama, Japan
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- NEXT-Ganken Program, Japanese Foundation for Cancer Research (JFCR), Tokyo, Japan
- Science Groove Inc., Fukuoka, Japan
| | - Kei Sato
- Division of Systems Virology, Department of Infectious Disease Control, International Research Center for Infectious Diseases, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Laboratory of Systems Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
- CREST, Japan Science and Technology Agency, Saitama, Japan
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41
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Rajah MM, Bernier A, Buchrieser J, Schwartz O. The Mechanism and Consequences of SARS-CoV-2 Spike-Mediated Fusion and Syncytia Formation. J Mol Biol 2022; 434:167280. [PMID: 34606831 PMCID: PMC8485708 DOI: 10.1016/j.jmb.2021.167280] [Citation(s) in RCA: 90] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022]
Abstract
Syncytia are formed when individual cells fuse. SARS-CoV-2 induces syncytia when the viral spike (S) protein on the surface of an infected cell interacts with receptors on neighboring cells. Syncytia may potentially contribute to pathology by facilitating viral dissemination, cytopathicity, immune evasion, and inflammatory response. SARS-CoV-2 variants of concern possess several mutations within the S protein that enhance receptor interaction, fusogenicity and antibody binding. In this review, we discuss the molecular determinants of S mediated fusion and the antiviral innate immunity components that counteract syncytia formation. Several interferon-stimulated genes, including IFITMs and LY6E act as barriers to S protein-mediated fusion by altering the composition or biophysical properties of the target membrane. We also summarize the effect that the mutations associated with the variants of concern have on S protein fusogenicity. Altogether, this review contextualizes the current understanding of Spike fusogenicity and the role of syncytia during SARS-CoV-2 infection and pathology.
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Affiliation(s)
- Maaran Michael Rajah
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, CNRS UMR 3569, Paris, France; Université de Paris, Sorbonne Paris Cité, Paris, France. https://twitter.com/MaaranRajah
| | - Annie Bernier
- Institut Curie, INSERM U932, Paris, France. https://twitter.com/nini_bernier
| | - Julian Buchrieser
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, CNRS UMR 3569, Paris, France. https://twitter.com/JBuchrieser
| | - Olivier Schwartz
- Virus & Immunity Unit, Department of Virology, Institut Pasteur, CNRS UMR 3569, Paris, France; Université de Paris, Sorbonne Paris Cité, Paris, France; Vaccine Research Institute, Creteil, France.
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42
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Lopez P, Ajibola O, Pagliuzza A, Zayats R, Koh WH, Herschhorn A, Chomont N, Murooka TT. T cell migration potentiates HIV infection by enhancing viral fusion and integration. Cell Rep 2022; 38:110406. [PMID: 35196491 DOI: 10.1016/j.celrep.2022.110406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 10/27/2021] [Accepted: 01/27/2022] [Indexed: 11/26/2022] Open
Abstract
T cells actively migrate along reticular networks within lymphoid organs in search for cognate antigen, but how these behaviors impact HIV entry and infection is unclear. Here, we show that migratory T cells in 3D collagen matrix display significantly enhanced infection and integration by cell-free R5-tropic lab adapted and transmitted/founder molecular HIV clones in the absence of exogenous cytokines or cationic polymers. Using two different collagen matrices that either support or restrict T cell migration, we observe high levels of HIV fusion in migratory T cells, whereas non-motile T cells display low viral entry and integration. Motile T cells were less sensitive to combination antiretroviral drugs and were able to freely migrate into regions with high HIV densities, resulting in high infection rates. Together, our studies indicate that the environmental context in which initial HIV-T cell encounters occur modulates HIV-1 entry and integration efficiencies.
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Affiliation(s)
- Paul Lopez
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Oluwaseun Ajibola
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Amelie Pagliuzza
- Department of Microbiology, Infectiology and Immunology, Centre de recherche du CHUM and Université de Montréal, Montreal, QC, Canada
| | - Romaniya Zayats
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Wan Hon Koh
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Alon Herschhorn
- Department of Medicine, Division of Infectious Diseases and International Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Nicolas Chomont
- Department of Microbiology, Infectiology and Immunology, Centre de recherche du CHUM and Université de Montréal, Montreal, QC, Canada
| | - Thomas T Murooka
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada; Department of Medical Microbiology and Infectious Disease, University of Manitoba, Winnipeg, MB, Canada.
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Mikaeloff F, Svensson Akusjärvi S, Ikomey GM, Krishnan S, Sperk M, Gupta S, Magdaleno GDV, Escós A, Lyonga E, Okomo MC, Tagne CT, Babu H, Lorson CL, Végvári Á, Banerjea AC, Kele J, Hanna LE, Singh K, de Magalhães JP, Benfeitas R, Neogi U. Trans cohort metabolic reprogramming towards glutaminolysis in long-term successfully treated HIV-infection. Commun Biol 2022; 5:27. [PMID: 35017663 PMCID: PMC8752762 DOI: 10.1038/s42003-021-02985-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/16/2021] [Indexed: 12/20/2022] Open
Abstract
Despite successful combination antiretroviral therapy (cART), persistent low-grade immune activation together with inflammation and toxic antiretroviral drugs can lead to long-lasting metabolic flexibility and adaptation in people living with HIV (PLWH). Our study investigated alterations in the plasma metabolic profiles by comparing PLWH on long-term cART(>5 years) and matched HIV-negative controls (HC) in two cohorts from low- and middle-income countries (LMIC), Cameroon, and India, respectively, to understand the system-level dysregulation in HIV-infection. Using untargeted and targeted LC-MS/MS-based metabolic profiling and applying advanced system biology methods, an altered amino acid metabolism, more specifically to glutaminolysis in PLWH than HC were reported. A significantly lower level of neurosteroids was observed in both cohorts and could potentiate neurological impairments in PLWH. Further, modulation of cellular glutaminolysis promoted increased cell death and latency reversal in pre-monocytic HIV-1 latent cell model U1, which may be essential for the clearance of the inducible reservoir in HIV-integrated cells.
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Affiliation(s)
- Flora Mikaeloff
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Sara Svensson Akusjärvi
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - George Mondinde Ikomey
- Center for the Study and Control of Communicable Diseases (CSCCD), Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, P.O. Box. 8445, Yaoundé, Cameroon
- Department of Microbiology, Haematology, Parasitology and Infectious Disease, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Shuba Krishnan
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Maike Sperk
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Soham Gupta
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Gustavo Daniel Vega Magdaleno
- Integrative Genomics of Ageing Group, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Alejandra Escós
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden
| | - Emilia Lyonga
- Center for the Study and Control of Communicable Diseases (CSCCD), Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, P.O. Box. 8445, Yaoundé, Cameroon
- Department of Microbiology, Haematology, Parasitology and Infectious Disease, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Marie Claire Okomo
- Center for the Study and Control of Communicable Diseases (CSCCD), Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, P.O. Box. 8445, Yaoundé, Cameroon
- Department of Microbiology, Haematology, Parasitology and Infectious Disease, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Claude Tayou Tagne
- Department of Microbiology, Haematology, Parasitology and Infectious Disease, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | - Hemalatha Babu
- Department of HIV/AIDS, National Institute for Research in Tuberculosis, ICMR, Chennai, 600031, India
- Division of Microbiology and Immunology, Yerkes National Primate Research Center, Emory Vaccine Center, Emory University, Atlanta, GA, 30329, USA
| | - Christian L Lorson
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, 65211, USA
| | - Ákos Végvári
- Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Akhil C Banerjea
- National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Julianna Kele
- Department of Physiology and Pharmacology, Neurovascular Biology and Health, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Luke Elizabeth Hanna
- Department of HIV/AIDS, National Institute for Research in Tuberculosis, ICMR, Chennai, 600031, India
| | - Kamal Singh
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, 65211, USA
| | - João Pedro de Magalhães
- Integrative Genomics of Ageing Group, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Rui Benfeitas
- National Bioinformatics Infrastructure Sweden (NBIS), Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, S-10691, Stockholm, Sweden
| | - Ujjwal Neogi
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm, Sweden.
- Manipal Institute of Virology (MIV), Manipal Academy of Higher Education, Manipal, Karnataka, India.
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HIV transmitting mononuclear phagocytes; integrating the old and new. Mucosal Immunol 2022; 15:542-550. [PMID: 35173293 PMCID: PMC9259493 DOI: 10.1038/s41385-022-00492-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 02/04/2023]
Abstract
In tissue, mononuclear phagocytes (MNP) are comprised of Langerhans cells, dendritic cells, macrophages and monocyte-derived cells. They are the first immune cells to encounter HIV during transmission and transmit the virus to CD4 T cells as a consequence of their antigen presenting cell function. To understand the role these cells play in transmission, their phenotypic and functional characterisation is important. With advancements in high parameter single cell technologies, new MNPs subsets are continuously being discovered and their definition and classification is in a state of flux. This has important implications for our knowledge of HIV transmission, which requires a deeper understanding to design effective vaccines and better blocking strategies. Here we review the historical research of the role MNPs play in HIV transmission up to the present day and revaluate these studies in the context of our most recent understandings of the MNP system.
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Wang L, Sandmeyer A, Hübner W, Li H, Huser T, Chen BK. A Replication-Competent HIV Clone Carrying GFP-Env Reveals Rapid Env Recycling at the HIV-1 T Cell Virological Synapse. Viruses 2021; 14:v14010038. [PMID: 35062242 PMCID: PMC8781834 DOI: 10.3390/v14010038] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/08/2021] [Accepted: 12/17/2021] [Indexed: 12/24/2022] Open
Abstract
HIV-1 infection is enhanced by cell-cell adhesions between infected and uninfected T cells called virological synapses (VS). VS are initiated by the interactions of cell-surface HIV-1 envelope glycoprotein (Env) and CD4 on target cells and act as sites of viral assembly and viral transfer between cells. To study the process that recruits and retains HIV-1 Env at the VS, a replication-competent HIV-1 clone carrying an Env-sfGFP fusion protein was designed to enable live tracking of Env within infected cells. Combined use of surface pulse-labeling of Env and fluorescence recovery after photobleaching (FRAP) studies, enabled the visualization of the targeted accumulation and sustained recycling of Env between endocytic compartments (EC) and the VS. We observed dynamic exchange of Env at the VS, while the viral structural protein, Gag, was largely immobile at the VS. The disparate exchange rates of Gag and Env at the synapse support that the trafficking and/or retention of a majority of Env towards the VS is not maintained by entrapment by a Gag lattice or immobilization by binding to CD4 on the target cell. A FRAP study of an Env endocytosis mutant showed that recycling is not required for accumulation at the VS, but is required for the rapid exchange of Env at the VS. We conclude that the mechanism of Env accumulation at the VS and incorporation into nascent particles involves continuous internalization and targeted secretion rather than irreversible interactions with the budding virus, but that this recycling is largely dispensable for VS formation and viral transfer across the VS.
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Affiliation(s)
- Lili Wang
- Department of Medicine, Division of Infectious Disease, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (L.W.); (H.L.)
| | - Alice Sandmeyer
- Biomolecular Photonics, Department of Physics, University of Bielefeld, 33615 Bielefeld, Germany; (A.S.); (W.H.); (T.H.)
| | - Wolfgang Hübner
- Biomolecular Photonics, Department of Physics, University of Bielefeld, 33615 Bielefeld, Germany; (A.S.); (W.H.); (T.H.)
| | - Hongru Li
- Department of Medicine, Division of Infectious Disease, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (L.W.); (H.L.)
| | - Thomas Huser
- Biomolecular Photonics, Department of Physics, University of Bielefeld, 33615 Bielefeld, Germany; (A.S.); (W.H.); (T.H.)
| | - Benjamin K. Chen
- Department of Medicine, Division of Infectious Disease, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (L.W.); (H.L.)
- Correspondence:
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Kreger J, Komarova NL, Wodarz D. A hybrid stochastic-deterministic approach to explore multiple infection and evolution in HIV. PLoS Comput Biol 2021; 17:e1009713. [PMID: 34936647 PMCID: PMC8730440 DOI: 10.1371/journal.pcbi.1009713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 01/05/2022] [Accepted: 12/02/2021] [Indexed: 11/30/2022] Open
Abstract
To study viral evolutionary processes within patients, mathematical models have been instrumental. Yet, the need for stochastic simulations of minority mutant dynamics can pose computational challenges, especially in heterogeneous systems where very large and very small sub-populations coexist. Here, we describe a hybrid stochastic-deterministic algorithm to simulate mutant evolution in large viral populations, such as acute HIV-1 infection, and further include the multiple infection of cells. We demonstrate that the hybrid method can approximate the fully stochastic dynamics with sufficient accuracy at a fraction of the computational time, and quantify evolutionary end points that cannot be expressed by deterministic models, such as the mutant distribution or the probability of mutant existence at a given infected cell population size. We apply this method to study the role of multiple infection and intracellular interactions among different virus strains (such as complementation and interference) for mutant evolution. Multiple infection is predicted to increase the number of mutants at a given infected cell population size, due to a larger number of infection events. We further find that viral complementation can significantly enhance the spread of disadvantageous mutants, but only in select circumstances: it requires the occurrence of direct cell-to-cell transmission through virological synapses, as well as a substantial fitness disadvantage of the mutant, most likely corresponding to defective virus particles. This, however, likely has strong biological consequences because defective viruses can carry genetic diversity that can be incorporated into functional virus genomes via recombination. Through this mechanism, synaptic transmission in HIV might promote virus evolvability. The evolution of human immunodeficiency virus within patients is an important part of the disease process. In particular, the presence of mutants that are resistant against anti-viral drugs can result in challenges to the long-term control of the infection. To study disease progression, computer simulations have been useful. However, in some cases these simulations can be difficult because of the complexity of the model. Here, we use a computational complexity reducing algorithm to simulate mutant dynamics in large populations, which can approximate the full model at a fraction of the time. The use of this algorithm allows us to study different transmission methods, viral processes that occur between virus strains within individual cells, and important quantities such as the mutant distribution or the probability of mutant existence at a given infected cell population size. We find that the direct synaptic cell-to-cell transmission of the virus through virological synapses can have strong biological consequences because it can promote potentially defective viruses that carry genetic diversity which can be incorporated into functional virus genomes during infection. Through this process, synaptic transmission in human immunodeficiency virus might promote virus evolvability.
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Affiliation(s)
- Jesse Kreger
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, California, United States of America
- Department of Mathematics, University of California Irvine, Irvine, California, United States of America
- * E-mail:
| | - Natalia L. Komarova
- Department of Mathematics, University of California Irvine, Irvine, California, United States of America
| | - Dominik Wodarz
- Department of Mathematics, University of California Irvine, Irvine, California, United States of America
- Department of Population Health and Disease Prevention Program in Public Health Susan and Henry Samueli College of Health Sciences, University of California, Irvine, California, United States of America
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Single-chain variable fragments of broadly neutralizing antibodies prevent HIV cell-cell transmission. J Virol 2021; 96:e0193421. [PMID: 34935437 DOI: 10.1128/jvi.01934-21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Broadly neutralizing antibodies (bNAbs) are able to prevent HIV infection following passive administration. Single-chain variable fragments (scFv) may have advantages over IgG as their smaller size permits improved diffusion into mucosal tissues. We have previously shown that scFv of bNAbs retain significant breadth and potency against cell-free viral transmission in a TZM-bl assay. However, scFv have not been tested for their ability to block cell-cell transmission, a model in which full-sized bNAbs lose potency. We tested 4 scFv (CAP256.25, PGT121, 3BNC117 and 10E8v4) compared to IgG, in free-virus and cell-cell neutralization assays in A3.01 cells, against a panel of seven heterologous viruses. We show that free-virus neutralization titers in the TZM-bl and A3.01 assays were not significantly different, and confirm that scFv show a 1 to 32-fold reduction in activity in the cell-free model, compared to IgG. However, whereas IgG show 3.4 to 19-fold geometric mean potency loss in cell-cell neutralization compared to free-virus transmission, scFv had more comparable activity in the two assays, with only a 1.3 to 2.3-fold reduction. Geometric mean IC50 of scFv for cell-cell transmission ranged from 0.65 μg/ml (10E8v4) to 2.3 μg/ml (3BNC117) with IgG and scFv neutralization showing similar potency against cell-associated transmission. Therefore, despite the reduced activity of scFv in cell-free assays, their retention of activity in the cell-cell format may make scFv useful for the prevention of both modes of transmission in HIV prevention studies. Importance Broadly neutralizing antibodies (bNAbs) are a major focus for passive immunization against HIV, with the recently concluded HVTN AMP (Antibody Mediated Protection) trial providing proof of concept. Most studies focus on cell-free HIV, however cell-associated virus may play a significant role in HIV infection, pathogenesis and latency. Single-chain variable fragments (scFv) of antibodies may have increased tissue penetration, and reduced immunogenicity. We previously demonstrated that scFv of four HIV-directed bNAbs (CAP256-VRC26.25, PGT121, 3BNC117 and 10E8v4) retain significant potency and breadth against cell-free HIV. As some bNAbs have been shown to lose potency against cell-associated virus, we investigated the ability of bNAb scFv to neutralize this mode of transmission. We demonstrate that unlike IgG, scFv of bNAbs are able to neutralize cell-free and cell-associated virus with similar potency. These scFv, which show functional activity in the therapeutic range, may therefore be suitable for further development as passive immunity for HIV prevention.
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Lai M, Maori E, Quaranta P, Matteoli G, Maggi F, Sgarbanti M, Crucitta S, Pacini S, Turriziani O, Antonelli G, Heeney JL, Freer G, Pistello M. CRISPR/Cas9 Ablation of Integrated HIV-1 Accumulates Proviral DNA Circles with Reformed Long Terminal Repeats. J Virol 2021; 95:e0135821. [PMID: 34549986 PMCID: PMC8577360 DOI: 10.1128/jvi.01358-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 09/12/2021] [Indexed: 12/03/2022] Open
Abstract
Gene editing may be used to excise the human immunodeficiency virus type 1 (HIV-1) provirus from the host cell genome, possibly eradicating the infection. Here, using cells acutely or latently infected by HIV-1 and treated with long terminal repeat (LTR)-targeting CRISPR/Cas9, we show that the excised HIV-1 provirus persists for a few weeks and may rearrange in circular molecules. Although circular proviral DNA is naturally formed during HIV-1 replication, we observed that gene editing might increase proviral DNA circles with restored LTRs. These extrachromosomal elements were recovered and probed for residual activity through their transfection in uninfected cells. We discovered that they can be transcriptionally active in the presence of Tat and Rev. Although confirming that gene editing is a powerful tool to eradicate HIV-1 infection, this work highlights that, to achieve this goal, the LTRs must be cleaved in several pieces to avoid residual activity and minimize the risk of reintegration in the context of genomic instability, possibly caused by the off-target activity of Cas9. IMPORTANCE The excision of HIV-1 provirus from the host cell genome has proven feasible in vitro and, to some extent, in vivo. Among the different approaches, CRISPR/Cas9 is the most promising tool for gene editing. The present study underlines the remarkable effectiveness of CRISPR/Cas9 in removing the HIV-1 provirus from infected cells and investigates the fate of the excised HIV-1 genome. This study demonstrates that the free provirus may persist in the cell after editing and in appropriate circumstances may reactivate. As an episome, it might be transcriptionally active, especially in the presence of Tat and Rev. The persistence of the HIV-1 episome was strongly decreased by gene editing with multiple targets. Although gene editing has the potential to eradicate HIV-1 infection, this work highlights a potential issue that warrants further investigation.
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Affiliation(s)
- Michele Lai
- Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
- Laboratory of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Eyal Maori
- Laboratory of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Paola Quaranta
- Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Giulia Matteoli
- Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
- Laboratory of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Fabrizio Maggi
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
- Virology Unit, Pisa University Hospital, Pisa, Italy
| | | | - Stefania Crucitta
- Pharmacology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Simone Pacini
- Hematology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Ombretta Turriziani
- Laboratory of Virology, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
- Pasteur Institute-Cenci Bolognetti Foundation, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Guido Antonelli
- Laboratory of Virology, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
- Pasteur Institute-Cenci Bolognetti Foundation, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Jonathan L. Heeney
- Laboratory of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Giulia Freer
- Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Mauro Pistello
- Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
- Virology Unit, Pisa University Hospital, Pisa, Italy
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Elaiw AM, AlShamrani NH. Analysis of an HTLV/HIV dual infection model with diffusion. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2021; 18:9430-9473. [PMID: 34814353 DOI: 10.3934/mbe.2021464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In the literature, several HTLV-I and HIV single infections models with spatial dependence have been developed and analyzed. However, modeling HTLV/HIV dual infection with diffusion has not been studied. In this work we derive and investigate a PDE model that describes the dynamics of HTLV/HIV dual infection taking into account the mobility of viruses and cells. The model includes the effect of Cytotoxic T lymphocytes (CTLs) immunity. Although HTLV-I and HIV primarily target the same host, CD4+T cells, via infected-to-cell (ITC) contact, however the HIV can also be transmitted through free-to-cell (FTC) contact. Moreover, HTLV-I has a vertical transmission through mitosis of active HTLV-infected cells. The well-posedness of solutions, including the existence of global solutions and the boundedness, is justified. We derive eight threshold parameters which govern the existence and stability of the eight steady states of the model. We study the global stability of all steady states based on the construction of suitable Lyapunov functions and usage of Lyapunov-LaSalle asymptotic stability theorem. Lastly, numerical simulations are carried out in order to verify the validity of our theoretical results.
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Affiliation(s)
- A M Elaiw
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
- Department of Mathematics, Faculty of Science, Al-Azhar University, Assiut Branch, Assiut 71452, Egypt
| | - N H AlShamrani
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
- Department of Mathematics, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
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50
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Abstract
Tick-borne encephalitis virus (TBEV), of the genus Flavivirus, is a causative agent of severe encephalitis in endemic regions of northern Asia and central and northern Europe. Interferon induced transmembrane proteins (IFITMs) are restriction factors that inhibit the replication cycles of numerous viruses, including flaviviruses such as the West Nile virus, dengue virus, and Zika virus. Here, we demonstrate the role of IFITM1, IFITM2, and IFITM3 in the inhibition of TBEV infection and in protection against virus-induced cell death. We show the most significant role being that of IFITM3, including the dissection of its functional motifs by mutagenesis. Furthermore, through the use of CRISPR-Cas9-generated IFITM1/3-knockout monoclonal cell lines, we confirm the role and additive action of endogenous IFITMs in TBEV suppression. However, the results of co-culture assays suggest that TBEV might partially escape IFN- and IFITM-mediated suppression during high-density co-culture infection when the virus enters naïve cells directly from infected donor cells. Thus, cell-to-cell spread may constitute a strategy for virus escape from innate host defenses. Importance: TBEV infection may result in encephalitis, chronic illness or death. TBEV is endemic in northern Asia and Europe; however, due to climate change, new endemic centers arise. Although effective TBEV vaccines have been approved, vaccination coverage is low, and, due to the lack of specific therapeutics, infected individuals depend on their immune responses to control the infection. The IFITM proteins are components of the innate antiviral defenses that suppress cell entry of many viral pathogens. However, no studies regarding the role of IFITM proteins in the TBEV infection have been published so far. Understanding of antiviral innate immune responses is crucial for future development of antiviral strategies. Here, we show the important role of IFITM proteins in the inhibition of TBEV infection and virus-mediated cell death. However, our data suggest that TBEV cell-to-cell spread may be less prone to both IFN- and IFITM-mediated suppression, potentially facilitating escape from IFITM-mediated immunity.
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