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Piret J, Boivin G. Management of Cytomegalovirus Infections in the Era of the Novel Antiviral Players, Letermovir and Maribavir. Infect Dis Rep 2024; 16:65-82. [PMID: 38247977 PMCID: PMC10801527 DOI: 10.3390/idr16010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/08/2024] [Accepted: 01/12/2024] [Indexed: 01/23/2024] Open
Abstract
Cytomegalovirus (CMV) infections may increase morbidity and mortality in immunocompromised patients. Until recently, standard antiviral drugs against CMV were limited to viral DNA polymerase inhibitors (val)ganciclovir, foscarnet and cidofovir with a risk for cross-resistance. These drugs may also cause serious side effects. This narrative review provides an update on new antiviral agents that were approved for the prevention and treatment of CMV infections in transplant recipients. Letermovir was approved in 2017 for CMV prophylaxis in CMV-seropositive adults who received an allogeneic hematopoietic stem cell transplant. Maribavir followed four years later, with an indication in the treatment of adult and pediatric transplant patients with refractory/resistant CMV disease. The target of letermovir is the CMV terminase complex (constituted of pUL56, pUL89 and pUL51 subunits). Letermovir prevents the cleavage of viral DNA and its packaging into capsids. Maribavir is a pUL97 kinase inhibitor, which interferes with the assembly of capsids and the egress of virions from the nucleus. Both drugs have activity against most CMV strains resistant to standard drugs and exhibit favorable safety profiles. However, high-level resistance mutations may arise more rapidly in the UL56 gene under letermovir than low-grade resistance mutations. Some mutations emerging in the UL97 gene under maribavir can be cross-resistant with ganciclovir. Thus, letermovir and maribavir now extend the drug arsenal available for the management of CMV infections and their respective niches are currently defined.
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Affiliation(s)
| | - Guy Boivin
- Centre de Recherche en Infectiologie, CHU de Québec-Université Laval, Quebec City, QC G1V 4G2, Canada;
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Lapeyre L, Piret J, Rhéaume C, Pons V, Uyar O, Préfontaine P, Rivest S, Boivin G. Herpes Simplex Virus 1 Infection Does Not Increase Amyloid-β Pathology in APP/PS1 Mice. J Alzheimers Dis 2024; 97:171-178. [PMID: 38143354 DOI: 10.3233/jad-230746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Using APP/PS1 mice that overproduce amyloid-β (Aβ) peptides, we investigated whether intranasal infection with a neurovirulent clinical strain of herpes simplex virus 1 (HSV-1) before Aβ deposition could accelerate or increase Alzheimer's disease-like pathology. After HSV-1 infection, APP/PS1 mice presented a similar disease as wild type animals based on body weight changes, clinical symptoms, and survival rates. The number and volume of Aβ plaques, the number of microglia, and the percentages of circulating monocyte subsets were similar in APP/PS1 mice infected or not with HSV-1. Thus, intranasal infection with HSV-1 does not alter Aβ pathology in this mouse model.
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Affiliation(s)
- Lina Lapeyre
- Research Center in infectious diseases, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Jocelyne Piret
- Research Center in infectious diseases, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Chantal Rhéaume
- Research Center in infectious diseases, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Vincent Pons
- Neuroscience laboratory, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Olus Uyar
- Research Center in infectious diseases, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Paul Préfontaine
- Neuroscience laboratory, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Serge Rivest
- Neuroscience laboratory, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Center in infectious diseases, Research center of the CHU de Québec-Laval University, Quebec City, QC, Canada
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Piret J, Boivin G. The impact of trained immunity in respiratory viral infections. Rev Med Virol 2024; 34:e2510. [PMID: 38282407 DOI: 10.1002/rmv.2510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/30/2024]
Abstract
Epidemic peaks of respiratory viruses that co-circulate during the winter-spring seasons can be synchronous or asynchronous. The occurrence of temporal patterns in epidemics caused by some respiratory viruses suggests that they could negatively interact with each other. These negative interactions may result from a programme of innate immune memory, known as trained immunity, which may confer broad protective effects against respiratory viruses. It is suggested that stimulation of innate immune cells by a vaccine or a pathogen could induce their long-term functional reprogramming through an interplay between metabolic and epigenetic changes, which influence the transcriptional response to a secondary challenge. During the coronavirus disease 2019 pandemic, the circulation of most respiratory viruses was prevented by non-pharmacological interventions and then resumed at unusual periods once sanitary measures were lifted. With time, respiratory viruses should find again their own ecological niches. This transition period provides an opportunity to study the interactions between respiratory viruses at the population level.
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Affiliation(s)
- Jocelyne Piret
- Research Center of the CHU de Québec-Université Laval, Quebec City, Quebec, Canada
| | - Guy Boivin
- Research Center of the CHU de Québec-Université Laval, Quebec City, Quebec, Canada
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Piret J, Boivin G. Corrigendum: Pandemics throughout history. Front Microbiol 2022; 13:988058. [PMID: 36238591 PMCID: PMC9552760 DOI: 10.3389/fmicb.2022.988058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 09/09/2022] [Indexed: 11/21/2022] Open
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Kunitskaya A, Sabour N, Herbst L, Piret J. Immunotherapy: IMPACT FROM TRANSIENT EXTREME MICROENVIRONMENT CONDITIONS ON T-CELLS DURING BIOPROCESSING. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00357-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Piret J, Goyette N, Boivin G. In vitro activity of letermovir against human cytomegalovirus isolates with different drug susceptibility phenotypes. Antiviral Res 2022; 202:105328. [PMID: 35490740 DOI: 10.1016/j.antiviral.2022.105328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 11/16/2022]
Abstract
Letermovir (LTV) is approved for the prophylaxis of human cytomegalovirus (HCMV) infection in adult seropositive recipients of an allogeneic hematopoietic stem cell transplant. Here, we report on the in vitro activity of LTV against a large panel of clinical HCMV isolates and recombinant viruses with different drug susceptibility phenotypes to currently-approved DNA polymerase inhibitors or maribavir. No pre-existing mutations conferring resistance to LTV were detected by Sanger sequencing in clinical HCMV isolates susceptible or resistant to DNA polymerases inhibitors. The susceptibility of LTV against the different recombinant HCMV mutants with amino acid substitutions in the UL97 kinase or in the UL54 DNA polymerase was similar to that of the wild type virus. LTV was also effective against recombinant HCMV harboring UL97 mutations conferring resistance to maribavir.
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Affiliation(s)
- Jocelyne Piret
- CHU de Québec-Université Laval, Quebec City, Quebec, Canada
| | | | - Guy Boivin
- CHU de Québec-Université Laval, Quebec City, Quebec, Canada.
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Abstract
Multiple respiratory viruses can concurrently or sequentially infect the respiratory tract and lead to virus‒virus interactions. Infection by a first virus could enhance or reduce infection and replication of a second virus, resulting in positive (additive or synergistic) or negative (antagonistic) interaction. The concept of viral interference has been demonstrated at the cellular, host, and population levels. The mechanisms involved in viral interference have been evaluated in differentiated airway epithelial cells and in animal models susceptible to the respiratory viruses of interest. A likely mechanism is the interferon response that could confer a temporary nonspecific immunity to the host. During the coronavirus disease pandemic, nonpharmacologic interventions have prevented the circulation of most respiratory viruses. Once the sanitary restrictions are lifted, circulation of seasonal respiratory viruses is expected to resume and will offer the opportunity to study their interactions, notably with severe acute respiratory syndrome coronavirus 2.
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Abstract
Human herpesviruses are large double-stranded DNA viruses belonging to the Herpesviridae family. The main characteristics of these viruses are their ability to establish a lifelong latency into the host with a potential to reactivate periodically. Primary infections and reactivations with herpesviruses are responsible for a large spectrum of diseases and may result in severe complications in immunocompromised patients. The viral DNA polymerase is a key enzyme in the replicative cycle of herpesviruses, and the target of most antiviral agents (i.e., nucleoside, nucleotide and pyrophosphate analogs). However, long-term prophylaxis and treatment with these antivirals may lead to the emergence of drug-resistant isolates harboring mutations in genes encoding viral enzymes that phosphorylate drugs (nucleoside analogs) and/or DNA polymerases, with potential cross-resistance between the different analogs. Drug resistance mutations mainly arise in conserved regions of the polymerase and exonuclease functional domains of these enzymes. In the polymerase domain, mutations associated with resistance to nucleoside/nucleotide analogs may directly or indirectly affect drug binding or incorporation into the primer strand, or increase the rate of extension of DNA to overcome chain termination. In the exonuclease domain, mutations conferring resistance to nucleoside/nucleotide analogs may reduce the rate of excision of incorporated drug, or continue DNA elongation after drug incorporation without excision. Mutations associated with resistance to pyrophosphate analogs may alter drug binding or the conformational changes of the polymerase domain required for an efficient activity of the enzyme. Novel herpesvirus inhibitors with a potent antiviral activity against drug-resistant isolates are thus needed urgently.
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Affiliation(s)
| | - Guy Boivin
- CHU de Québec-Université Laval, Quebec City, QC, Canada.
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Uyar O, Plante PL, Piret J, Venable MC, Carbonneau J, Corbeil J, Boivin G. A novel bioluminescent herpes simplex virus 1 for in vivo monitoring of herpes simplex encephalitis. Sci Rep 2021; 11:18688. [PMID: 34548521 PMCID: PMC8455621 DOI: 10.1038/s41598-021-98047-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/26/2021] [Indexed: 11/22/2022] Open
Abstract
Herpes simplex virus 1 (HSV-1) is responsible for herpes simplex virus encephalitis (HSE), associated with a 70% mortality rate in the absence of treatment. Despite intravenous treatment with acyclovir, mortality remains significant, highlighting the need for new anti-herpetic agents. Herein, we describe a novel neurovirulent recombinant HSV-1 (rHSV-1), expressing the fluorescent tdTomato and Gaussia luciferase (Gluc) enzyme, generated by the Clustered regularly interspaced short palindromic repeats (CRISPR)—CRISPR-associated protein 9 (Cas9) (CRISPR-Cas9) system. The Gluc activity measured in the cell culture supernatant was correlated (P = 0.0001) with infectious particles, allowing in vitro monitoring of viral replication kinetics. A significant correlation was also found between brain viral titers and Gluc activity in plasma (R2 = 0.8510, P < 0.0001) collected from BALB/c mice infected intranasally with rHSV-1. Furthermore, evaluation of valacyclovir (VACV) treatment of HSE could also be performed by analyzing Gluc activity in mouse plasma samples. Finally, it was also possible to study rHSV-1 dissemination and additionally to estimate brain viral titers by in vivo imaging system (IVIS). The new rHSV-1 with reporter proteins is not only as a powerful tool for in vitro and in vivo antiviral screening, but can also be used for studying different aspects of HSE pathogenesis.
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Affiliation(s)
- Olus Uyar
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Pediatrics and Microbiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Pier-Luc Plante
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Molecular Medicine and Big Data Research Centre, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Pediatrics and Microbiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Marie-Christine Venable
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Pediatrics and Microbiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Julie Carbonneau
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Pediatrics and Microbiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Jacques Corbeil
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Molecular Medicine and Big Data Research Centre, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU de Québec-Laval University Research Center and Department of Pediatrics and Microbiology, Faculty of Medicine, Laval University, Quebec City, QC, Canada.
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Enlow W, Bordeleau M, Piret J, Ibáñez FG, Uyar O, Venable MC, Goyette N, Carbonneau J, Tremblay ME, Boivin G. Microglia are involved in phagocytosis and extracellular digestion during Zika virus encephalitis in young adult immunodeficient mice. J Neuroinflammation 2021; 18:178. [PMID: 34399779 PMCID: PMC8369691 DOI: 10.1186/s12974-021-02221-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/16/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Zika virus (ZIKV) has been associated with several neurological complications in adult patients. METHODS We used a mouse model deficient in TRIF and IPS-1 adaptor proteins, which are involved in type I interferon production, to study the role of microglia during brain infection by ZIKV. Young adult mice were infected intravenously with the contemporary ZIKV strain PRVABC59 (1 × 105 PFUs/100 µL). RESULTS Infected mice did not present overt clinical signs of the disease nor body weight loss compared with noninfected animals. However, mice exhibited a viremia and a brain viral load that were maximal (1.3 × 105 genome copies/mL and 9.8 × 107 genome copies/g of brain) on days 3 and 7 post-infection (p.i.), respectively. Immunohistochemistry analysis showed that ZIKV antigens were distributed in several regions of the brain, especially the dorsal hippocampus. The number of Iba1+/TMEM119+ microglia remained similar in infected versus noninfected mice, but their cell body and arborization areas significantly increased in the stratum radiatum and stratum lacunosum-moleculare layers of the dorsal hippocampus cornu ammoni (CA)1, indicating a reactive state. Ultrastructural analyses also revealed that microglia displayed increased phagocytic activities and extracellular digestion of degraded elements during infection. Mice pharmacologically depleted in microglia with PLX5622 presented a higher brain viral load compared to untreated group (2.8 × 1010 versus 8.5 × 108 genome copies/g of brain on day 10 p.i.) as well as an increased number of ZIKV antigens labeled with immunogold in the cytoplasm and endoplasmic reticulum of neurons and astrocytes indicating an enhanced viral replication. Furthermore, endosomes of astrocytes contained nanogold particles together with digested materials, suggesting a compensatory phagocytic activity upon microglial depletion. CONCLUSIONS These results indicate that microglia are involved in the control of ZIKV replication and/or its elimination in the brain. After depletion of microglia, the removal of ZIKV-infected cells by phagocytosis could be partly compensated by astrocytes.
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Affiliation(s)
- William Enlow
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Maude Bordeleau
- Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada.,Neurosciences Axis, Centre de recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Jocelyne Piret
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Fernando González Ibáñez
- Neurosciences Axis, Centre de recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada.,Department of Molecular Medicine, Université Laval, Quebec City, QC, Canada.,Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Olus Uyar
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Marie-Christine Venable
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Nathalie Goyette
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Julie Carbonneau
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Marie-Eve Tremblay
- Neurosciences Axis, Centre de recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada. .,Department of Molecular Medicine, Université Laval, Quebec City, QC, Canada. .,Division of Medical Sciences, University of Victoria, Victoria, BC, Canada. .,Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada. .,Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, BC, Canada.
| | - Guy Boivin
- Centre de Recherche en Infectiologie, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC, Canada.
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G. Pedroza R, Saleh S, Russo V, Dickman C, Getsios S, Wadsworth S, Piret J. Engineering the design of cell encapsulated alginate fibres for the treatment of diabetes. Cytotherapy 2021. [DOI: 10.1016/s1465324921005089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Zarrouk K, Zhu X, Goyette N, Piret J, Shi R, Boivin G. Differential impact of various substitutions at codon 715 in region II of HSV-1 and HCMV DNA polymerases. Antiviral Res 2021; 188:105046. [PMID: 33588012 DOI: 10.1016/j.antiviral.2021.105046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 01/13/2023]
Abstract
This study aimed at understanding the impact of different substitutions at codon 715 localized in the region II of the palm domain of herpes simplex virus 1 (HSV-1) and human cytomegalovirus (HCMV) DNA polymerases (pol). Here, we report a new theoretical mutation V715S that confers resistance of HSV-1 to foscarnet/acyclovir (5.6- and 9.2-fold increases EC50 values compared to wild type, respectively) and of HCMV to foscarnet/ganciclovir (2.8- and 2.9-fold increases in EC50 values compared to wild type, respectively). To further analyze the importance of this amino acid, we investigated the impact of the already known mutations V715M and V715G on the replicative capacities and drug susceptibilities of both viruses as well as on the activity and drug inhibition of the DNA pol. The V715G recombinant HSV-1 mutant was resistant to foscarnet and acyclovir (3.4- and 4.6-fold EC50 increase, respectively) whereas the V715M mutant was susceptible to foscarnet and resistant to acyclovir (3.4-fold EC50 increase). The V715G recombinant HCMV mutant did not grow and the V715M mutant was resistant to foscarnet (3.7-fold EC50 increase) and susceptible to ganciclovir. Finally, we showed by three-dimensional modeling that the differential impact of these mutations on the viral replicative capacity and drug resistance profile was related to different hydrophobic local environments for V715 in the DNA pol of the two viruses. Furthermore, we hypothesize that the DNA pol of HSV-1 is more tolerant to changes at this residue compared to that of HCMV because of a more hydrophobic environment stabilizing the region.
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Affiliation(s)
- Karima Zarrouk
- Research Center in Infectious Diseases, CHU de Québec- Laval University, Quebec City, QC, Canada
| | - Xiaojun Zhu
- Department of Biochemistry, Microbiology and Bioinformatics, PROTEO, And Institute of Integrative and Systems Biology, Laval University, Quebec City, QC, Canada
| | - Nathalie Goyette
- Research Center in Infectious Diseases, CHU de Québec- Laval University, Quebec City, QC, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases, CHU de Québec- Laval University, Quebec City, QC, Canada
| | - Rong Shi
- Department of Biochemistry, Microbiology and Bioinformatics, PROTEO, And Institute of Integrative and Systems Biology, Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU de Québec- Laval University, Quebec City, QC, Canada.
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Abstract
The emergence and spread of infectious diseases with pandemic potential occurred regularly throughout history. Major pandemics and epidemics such as plague, cholera, flu, severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) have already afflicted humanity. The world is now facing the new coronavirus disease 2019 (COVID-19) pandemic. Many infectious diseases leading to pandemics are caused by zoonotic pathogens that were transmitted to humans due to increased contacts with animals through breeding, hunting and global trade activities. The understanding of the mechanisms of transmission of pathogens to humans allowed the establishment of methods to prevent and control infections. During centuries, implementation of public health measures such as isolation, quarantine and border control helped to contain the spread of infectious diseases and maintain the structure of the society. In the absence of pharmaceutical interventions, these containment methods have still been used nowadays to control COVID-19 pandemic. Global surveillance programs of water-borne pathogens, vector-borne diseases and zoonotic spillovers at the animal-human interface are of prime importance to rapidly detect the emergence of infectious threats. Novel technologies for rapid diagnostic testing, contact tracing, drug repurposing, biomarkers of disease severity as well as new platforms for the development and production of vaccines are needed for an effective response in case of pandemics.
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Affiliation(s)
- Jocelyne Piret
- CHU de Québec - Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- CHU de Québec - Laval University, Quebec City, QC, Canada
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Abstract
The discovery of the nucleoside analogue, acyclovir, represented a milestone in the management of infections caused by herpes simplex virus and varicella-zoster virus. Ganciclovir, another nucleoside analogue, was then used for the management of systemic and organ-specific human cytomegalovirus diseases. The pyrophosphate analogue, foscarnet, and the nucleotide analogue, cidofovir, have been approved subsequently and constitute the second-line antiviral drugs. However, the viral DNA polymerase is the ultimate target of all these antiviral agents with a possible emergence of cross-resistance between these drugs. Recently, letermovir that targets the viral terminase complex was approved for the prophylaxis of human cytomegalovirus infections in hematopoietic stem cell transplant recipients. Other viral targets such as the protein kinase and the helicase-primase complex are also evaluated for the development of novel potent inhibitors against herpesviruses.
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Affiliation(s)
| | - Guy Boivin
- CHU de Québec-Laval University, Quebec City, QC, Canada.
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15
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Piret J, Schibler M, Pham VD, Hantz S, Giannotti F, Masouridi-Levrat S, Kaiser L, Goyette N, Alain S, Shi R, Boivin G. Compartmentalization of a Multidrug-Resistant Cytomegalovirus UL54 Mutant in a Stem Cell Transplant Recipient with Encephalitis. J Infect Dis 2020; 220:1302-1306. [PMID: 31199457 DOI: 10.1093/infdis/jiz298] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 06/10/2019] [Indexed: 11/13/2022] Open
Abstract
We report a case of cytomegalovirus encephalitis in a hematopoietic stem cell transplant recipient. A previously uncharacterized V787E mutation in UL54 was identified in cerebrospinal fluid but not plasma specimens. For the V787E recombinant virus, the half maximal effective concentrations for ganciclovir, foscarnet, and cidofovir were 8.6-, 3.4- and 2.9-fold higher than for wild-type virus, and the replicative capacity was lower. The introduction of a bulkier and negatively charged glutamate residue at position 787 could destabilize the finger domain of UL54 DNA polymerase. Viral genotyping of cerebrospinal fluid is warranted in subjects with cytomegalovirus encephalitis, owing to the low penetration of antivirals in this compartment.
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Affiliation(s)
- Jocelyne Piret
- Centre de recherche en infectiologie, CHU de Québec-Université Laval
| | - Manuel Schibler
- Laboratory of Virology and Infectious Diseases Division, Geneva, Switzerland
| | - Van Dung Pham
- Institut de Biologie Intégrative et des Systèmes, Université Laval.,Département de Biochimie, de Microbiologie et de Bio-informatique, PROTEO, Quebec City, Canada
| | - Sébastien Hantz
- INSERM, CHU Limoges, RESINFIT, Université de Limoges.,Laboratoire de Bactériologie-Virologie-Hygiène, CHU Limoges.,National Reference Center for Herpesviruses, Limoges, France
| | | | | | - Laurent Kaiser
- Laboratory of Virology and Infectious Diseases Division, Geneva, Switzerland
| | - Nathalie Goyette
- Centre de recherche en infectiologie, CHU de Québec-Université Laval
| | - Sophie Alain
- INSERM, CHU Limoges, RESINFIT, Université de Limoges.,Laboratoire de Bactériologie-Virologie-Hygiène, CHU Limoges.,National Reference Center for Herpesviruses, Limoges, France
| | - Rong Shi
- Institut de Biologie Intégrative et des Systèmes, Université Laval.,Département de Biochimie, de Microbiologie et de Bio-informatique, PROTEO, Quebec City, Canada
| | - Guy Boivin
- Centre de recherche en infectiologie, CHU de Québec-Université Laval
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Jones ST, Cagno V, Janeček M, Ortiz D, Gasilova N, Piret J, Gasbarri M, Constant DA, Han Y, Vuković L, Král P, Kaiser L, Huang S, Constant S, Kirkegaard K, Boivin G, Stellacci F, Tapparel C. Modified cyclodextrins as broad-spectrum antivirals. Sci Adv 2020; 6:eaax9318. [PMID: 32064341 PMCID: PMC6989148 DOI: 10.1126/sciadv.aax9318] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 11/22/2019] [Indexed: 05/18/2023]
Abstract
Viral infections kill millions of people and new antivirals are needed. Nontoxic drugs that irreversibly inhibit viruses (virucidal) are postulated to be ideal. Unfortunately, all virucidal molecules described to date are cytotoxic. We recently developed nontoxic, broad-spectrum virucidal gold nanoparticles. Here, we develop further the concept and describe cyclodextrins, modified with mercaptoundecane sulfonic acids, to mimic heparan sulfates and to provide the key nontoxic virucidal action. We show that the resulting macromolecules are broad-spectrum, biocompatible, and virucidal at micromolar concentrations in vitro against many viruses [including herpes simplex virus (HSV), respiratory syncytial virus (RSV), dengue virus, and Zika virus]. They are effective ex vivo against both laboratory and clinical strains of RSV and HSV-2 in respiratory and vaginal tissue culture models, respectively. Additionally, they are effective when administrated in mice before intravaginal HSV-2 inoculation. Lastly, they pass a mutation resistance test that the currently available anti-HSV drug (acyclovir) fails.
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Affiliation(s)
- Samuel T. Jones
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
- Department of Materials, University of Manchester, Manchester M13 9PL, UK
| | - Valeria Cagno
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva 1211, Switzerland
| | - Matej Janeček
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
| | - Daniel Ortiz
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Natalia Gasilova
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jocelyne Piret
- CHU of Québec-Laval University, Québec City, Québec, Canada
| | - Matteo Gasbarri
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
| | - David A. Constant
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yanxiao Han
- Department of Chemistry, University of Illinois, Chicago, IL 60607, USA
| | - Lela Vuković
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, TX 79966, USA
| | - Petr Král
- Department of Chemistry, University of Illinois, Chicago, IL 60607, USA
- Department of Physics, and Department of Biopharmaceutical Sciences, University of Illinois, Chicago, IL 60612, USA
| | - Laurent Kaiser
- Division of Infectious diseases, University Hospitals of Geneva, Geneva, Switzerland
| | | | | | - Karla Kirkegaard
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Guy Boivin
- CHU of Québec-Laval University, Québec City, Québec, Canada
| | - Francesco Stellacci
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
- Department of Bionengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
- Corresponding author. (C.T.); (F.S.)
| | - Caroline Tapparel
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva 1211, Switzerland
- Corresponding author. (C.T.); (F.S.)
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17
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Enlow W, Piret J, Boivin G. Droplet Digital PCR and Immunohistochemistry Techniques to Detect Zika Virus in the Central Nervous System of Mice. Methods Mol Biol 2020; 2142:41-57. [PMID: 32367357 DOI: 10.1007/978-1-0716-0581-3_4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Detection of Zika virus (ZIKV) in the central nervous system (CNS) is a critical step when studying the pathogenesis of the infection in animal models. Both viral load determination and immunohistochemistry (IHC) staining are useful methods to quantitatively and qualitatively characterize viral infections in target tissues. Here, we describe viral RNA load determination by droplet digital PCR as well as protein detection by polymer-based IHC as effective techniques to quantify and localize ZIKV in the CNS of mice.
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Affiliation(s)
- William Enlow
- Research Center in Infectious Diseases, CHU of Québec-Laval University, Québec City, QC, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases, CHU of Québec-Laval University, Québec City, QC, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU of Québec-Laval University, Québec City, QC, Canada.
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18
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Bibert S, Piret J, Quinodoz M, Collinet E, Zoete V, Michielin O, Menasria R, Meylan P, Bihl T, Erard V, Fellmann F, Rivolta C, Boivin G, Bochud PY. Herpes simplex encephalitis in adult patients with MASP-2 deficiency. PLoS Pathog 2019; 15:e1008168. [PMID: 31869396 PMCID: PMC6944389 DOI: 10.1371/journal.ppat.1008168] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 01/06/2020] [Accepted: 10/29/2019] [Indexed: 12/17/2022] Open
Abstract
We report here two cases of Herpes simplex virus encephalitis (HSE) in adult patients with very rare, previously uncharacterized, non synonymous heterozygous G634R and R203W substitution in mannan-binding lectin serine protease 2 (MASP2), a gene encoding a key protease of the lectin pathway of the complement system. None of the 2 patients had variants in genes involved in the TLR3-interferon signaling pathway. Both MASP2 variants induced functional defects in vitro, including a reduced (R203W) or abolished (G634R) protein secretion, a lost capability to cleave MASP-2 precursor into its active form (G634R) and an in vivo reduced antiviral activity (G634R). In a murine model of HSE, animals deficient in mannose binding lectins (MBL, the main pattern recognition molecule associated with MASP-2) had a decreased survival rate and an increased brain burden of HSV-1 compared to WT C57BL/6J mice. Altogether, these data suggest that MASP-2 deficiency can increase susceptibility to adult HSE. Human herpes virus type 1 (HSV-1) infects a large number of individuals during their life, with manifestations usually limited to mild and self-limiting inflammation of the oral mucosa (cold sore). However, HSV-1 can cause a very severe disease of the brain called Herpes simplex encephalitis (HSE) in 1 out of 250’000–500’000 individuals per year. The reasons why HSV-1 can cause such a devastating disease in a very limited number of individuals are unknown. Increasing evidence suggests that susceptibility to HSE in children can results from genetic variations in the immune system, in particular in a viral detection pathway called the Toll-like receptor 3 (TLR3)–interferon (IFN) axis. Fewer data are available to explain HSE in adult patients. Here, we describe two adult patients with HSE who carry mutations in a gene called mannan-binding lectin serine protease 2 (MASP2), which is part of an immune pathway different from the TLR3-IFN axis, called the lectin pathway of the complement system. We demonstrate that MASP2 mutations induce functional defects in immune defense against HSV-1 that prevent viral replication. Mice deficient in the lectin pathway have higher mortality compared to wild-type mice after HSV-1 infection. Altogether, our study suggests that susceptibility to HSE in adults relies of immune deficiencies that are different from those causing HSE in children.
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Affiliation(s)
- Stéphanie Bibert
- Infectious Diseases Service, Department of Medicine, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jocelyne Piret
- Research center in Infectious Diseases, CHU of Quebec and Laval University, Quebec city, Canada
| | - Mathieu Quinodoz
- Department of Computational Biology, Unit of Medical Genetics, University of Lausanne, Lausanne Switzerland
| | - Emilie Collinet
- Infectious Diseases Service, Department of Medicine, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Vincent Zoete
- Ludwig Institute for Cancer research, University of Lausanne, Lausanne, Switzerland
- Molecular Modeling Group, Swiss Institute of Bioinformatics, Quartier Sorge, Génopode, Lausanne, Switzerland
| | - Olivier Michielin
- Ludwig Institute for Cancer research, University of Lausanne, Lausanne, Switzerland
- Molecular Modeling Group, Swiss Institute of Bioinformatics, Quartier Sorge, Génopode, Lausanne, Switzerland
- Department of Oncology, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Rafik Menasria
- Research center in Infectious Diseases, CHU of Quebec and Laval University, Quebec city, Canada
| | - Pascal Meylan
- Infectious Diseases Service, Department of Medicine, University Hospital and University of Lausanne, Lausanne, Switzerland
- Institute of Microbiology, Department of Laboratory Medicine, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Titus Bihl
- Canton Hospital of Fribourg, Fribourg, Switzerland
| | | | - Florence Fellmann
- Department of Genetics, Laboratoire National de Santé, Dudelange, Luxembourg
| | - Carlo Rivolta
- Department of Computational Biology, Unit of Medical Genetics, University of Lausanne, Lausanne Switzerland
- Department of Genetics and Genome Biology, University of Leicester, Leicester, United Kingdom
| | - Guy Boivin
- Research center in Infectious Diseases, CHU of Quebec and Laval University, Quebec city, Canada
| | - Pierre-Yves Bochud
- Infectious Diseases Service, Department of Medicine, University Hospital and University of Lausanne, Lausanne, Switzerland
- * E-mail:
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19
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de La Vega MA, Piret J, Griffin BD, Rhéaume C, Venable MC, Carbonneau J, Couture C, das Neves Almeida R, Tremblay RR, Magalhães KG, Park YK, Roberts CC, Maslow JN, Sardesai NY, Kim JJ, Muthumani K, Weiner DB, Kobinger GP, Boivin G. Zika-Induced Male Infertility in Mice Is Potentially Reversible and Preventable by Deoxyribonucleic Acid Immunization. J Infect Dis 2019; 219:365-374. [PMID: 30053014 DOI: 10.1093/infdis/jiy336] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 06/01/2018] [Indexed: 11/13/2022] Open
Abstract
Background Zika virus (ZIKV) infection has been associated with prolonged viral excretion in human semen and causes testicular atrophy and infertility in 10-week-old immunodeficient mice. Methods Male IFNAR-/- mice, knockout for type I interferon receptor, were immunized with GLS-5700, a deoxyribonucleic acid-based vaccine, before a subcutaneous ZIKV challenge with 6 × 105 plaque-forming units at 13 weeks of age. On day 28 postinfection, testes and epididymides were collected in some mice for histological and functional analyses, whereas others were mated with naive female wild-type C57BL/6J. Results Although all mice challenged with ZIKV developed viremia, most of them were asymptomatic, showed no weight loss, and survived infection. On day 28 postinfection, none of the unvaccinated, infected mice (9 of 9) exhibited abnormal spermatozoa counts or motility. However, 33% (3 of 9) and 36% (4 of 11) of mated males from this group were infertile, from 2 independent studies. Contrarily, males from the noninfected and the vaccinated, infected groups were all fertile. On days 75 and 207 postinfection, partial recovery of fertility was observed in 66% (2 of 3) of the previously infertile males. Conclusions This study reports the effects of ZIKV infection on male fertility in a sublethal, immunodeficient mouse model and the efficacy of GLS-5700 vaccination in preventing male infertility.
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Affiliation(s)
- Marc-Antoine de La Vega
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec, Canada.,Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada
| | - Jocelyne Piret
- Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada
| | - Bryan D Griffin
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg.,Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada
| | - Chantal Rhéaume
- Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada
| | | | - Julie Carbonneau
- Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada
| | - Christian Couture
- Département d'Anatomo-Pathologie, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Canada.,Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Université Laval, Québec, Canada
| | | | - Roland R Tremblay
- Unité de Recherche en Reproduction, Santé de la Mère et de l'Enfant, Centre de Recherche du CHU de Québec - Université Laval, Canada
| | - Kelly G Magalhães
- Laboratory of Immunology and Inflammation, University of Brasilia, Brazil
| | | | | | - Joel N Maslow
- GeneOne Life Science Inc., Seoul, Korea.,Department of Medicine, Morristown Medical Center, New Jersey
| | | | - J Joseph Kim
- Inovio Pharmaceuticals, Inc., Plymouth Meeting, Pennsylvania
| | | | | | - Gary P Kobinger
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec, Canada.,Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada.,Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada.,Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia
| | - Guy Boivin
- Département de Microbiologie-Infectiologie et d'Immunologie, Université Laval, Québec, Canada.,Centre de Recherche en Infectiologie du CHU de Québec - Université Laval, Canada
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20
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Piret J, Boivin G. Clinical development of letermovir and maribavir: Overview of human cytomegalovirus drug resistance. Antiviral Res 2019; 163:91-105. [PMID: 30690043 DOI: 10.1016/j.antiviral.2019.01.011] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/17/2019] [Accepted: 01/18/2019] [Indexed: 01/28/2023]
Abstract
The prevention and treatment of human cytomegalovirus (HCMV) infections is based on the use of antiviral agents that currently target the viral DNA polymerase and that may cause serious side effects. The search for novel inhibitors against HCMV infection led to the discovery of new molecular targets, the viral terminase complex and the viral pUL97 kinase. The most advanced compounds consist of letermovir (LMV) and maribavir (MBV). LMV inhibits the cleavage of viral DNA and its packaging into capsids by targeting the HCMV terminase complex. LMV is safe and well tolerated and exhibits pharmacokinetic properties that allow once daily dosing. LMV showed efficacy in a phase III prophylaxis study in hematopoietic stem cell transplant (HSCT) recipients seropositive for HCMV. LMV was recently approved under the trade name Prevymis™ for prophylaxis of HCMV infection in adult seropositive recipients of an allogeneic HSCT. Amino acid substitutions conferring resistance to LMV selected in vitro map primarily to the pUL56 and rarely to the pUL89 and pUL51 subunits of the HCMV terminase complex. MBV is an inhibitor of the viral pUL97 kinase activity and interferes with the morphogenesis and nuclear egress of nascent viral particles. MBV is safe and well tolerated and has an excellent oral bioavailability. MBV was effective for the treatment of HCMV infections (including those that are refractory or drug-resistant) in transplant recipients in two phase II studies and is further evaluated in two phase III trials. Mutations conferring resistance to MBV map to the UL97 gene and can cause cross-resistance to ganciclovir. MBV-resistant mutations also emerged in the UL27 gene in vitro and could compensate for the inhibition of pUL97 kinase activity by MBV. Thus, LMV and probably MBV will broaden the armamentarium of antiviral drugs available for the prevention and treatment of HCMV infections.
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Affiliation(s)
- Jocelyne Piret
- Research Center in Infectious Diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada.
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21
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Canivet C, Rhéaume C, Lebel M, Piret J, Gosselin J, Boivin G. Both IRF3 and especially IRF7 play a key role to orchestrate an effective cerebral inflammatory response in a mouse model of herpes simplex virus encephalitis. J Neurovirol 2018; 24:761-768. [PMID: 30094631 DOI: 10.1007/s13365-018-0666-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/03/2018] [Accepted: 07/12/2018] [Indexed: 11/26/2022]
Abstract
The impact of a deficiency in interferon regulatory factor (IRF)3 and IRF7 was evaluated in an herpes simplex virus encephalitis (HSE) model. Compared to wild type (WT), the mortality rates of infected IRF3-/- and IRF7-/- mice were higher and associated with increased brain viral titers. At a critical time post-infection, IRF7-/- mice exhibited a deficit in IFN-β production. At a later time point, levels of type I IFNs and cytokines were increased in brains of both deficient mice compared to WT. Our results suggest that IRF3, and especially IRF7, are important for an effective control of inflammatory responses during HSE.
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Affiliation(s)
- Coraline Canivet
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Chantal Rhéaume
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Manon Lebel
- Laboratory of Innate Immunology of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Jean Gosselin
- Laboratory of Innate Immunology of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul. Laurier, Quebec City, QC, G1V 4G2, Canada.
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22
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Piret J, Carbonneau J, Rhéaume C, Baz M, Boivin G. Predominant role of IPS-1 over TRIF adaptor proteins in early innate immune response against Zika virus in mice. J Gen Virol 2018; 99:209-218. [PMID: 29297844 DOI: 10.1099/jgv.0.000992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Toll-like receptors and RNA helicases are involved in the control of RNA virus infection through production of type I interferons (IFNs). To delineate the relative contributions of these signalling pathways in the innate immune response and the control of Zika virus (ZIKV) pathogenesis, the impact of a deficiency in TRIF and/or IPS-1 adaptor proteins was investigated in mice. Mice were infected intravenously with ZIKV and monitored for clinical signs for 14 days. Groups of mice were sacrificed on days 1, 3 and 7 post-infection (p.i.) and viral RNA was measured by digital droplet PCR in serum, spleen, brain and eyes. Some mice were sacrificed at 12 h p.i. for determination of the levels of IFN-α/-β (ELISA), cytokines/chemokines (Luminex) and total/phosphorylated IRF3 and IRF7 (Western blotting). All groups of mice infected with ZIKV exhibited no clinical signs of infection. However, IPS-1-/- and TRIF-/-xIPS-1-/- mice developed higher viraemia than WT and TRIF-/- groups on days 1, 3 and 7. TRIF-/-xIPS-1-/- mice presented higher viral RNA levels in spleen, brain and eyes over time than TRIF-/-, IPS-1-/- and WT groups. At 12 h, IFN-α/-β and cytokine/chemokine levels in spleen were significantly decreased in IPS-1-/- and TRIF-/-xIPS-1-/- compared to WT and TRIF-/-. On day 1 p.i., IFN-β levels were significantly reduced in spleen of TRIF-/-xIPS-1-/- mice compared to all other groups. These data suggest that IPS-1 plays a more important role than TRIF in the early type I IFN response and that both IPS-1 and TRIF are involved at later stages of ZIKV infection.
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Affiliation(s)
- Jocelyne Piret
- Research center in infectious diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
| | - Julie Carbonneau
- Research center in infectious diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
| | - Chantal Rhéaume
- Research center in infectious diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
| | - Mariana Baz
- Research center in infectious diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research center in infectious diseases, CHU of Quebec and Laval University, Quebec City, QC, Canada
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23
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Griffin BD, Muthumani K, Warner BM, Majer A, Hagan M, Audet J, Stein DR, Ranadheera C, Racine T, De La Vega MA, Piret J, Kucas S, Tran KN, Frost KL, De Graff C, Soule G, Scharikow L, Scott J, McTavish G, Smid V, Park YK, Maslow JN, Sardesai NY, Kim JJ, Yao XJ, Bello A, Lindsay R, Boivin G, Booth SA, Kobasa D, Embury-Hyatt C, Safronetz D, Weiner DB, Kobinger GP. DNA vaccination protects mice against Zika virus-induced damage to the testes. Nat Commun 2017; 8:15743. [PMID: 28589934 PMCID: PMC5467228 DOI: 10.1038/ncomms15743] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/24/2017] [Indexed: 12/13/2022] Open
Abstract
Zika virus (ZIKV) is an emerging pathogen causally associated with serious sequelae in fetuses, inducing fetal microcephaly and other neurodevelopment defects. ZIKV is primarily transmitted by mosquitoes, but can persist in human semen and sperm, and sexual transmission has been documented. Moreover, exposure of type-I interferon knockout mice to ZIKV results in severe damage to the testes, epididymis and sperm. Candidate ZIKV vaccines have shown protective efficacy in preclinical studies carried out in animal models, and several vaccines have entered clinical trials. Here, we report that administration of a synthetic DNA vaccine encoding ZIKV pre-membrane and envelope (prME) completely protects mice against ZIKV-associated damage to the testes and sperm and prevents viral persistence in the testes following challenge with a contemporary strain of ZIKV. These data suggest that DNA vaccination merits further investigation as a potential means to reduce ZIKV persistence in the male reproductive tract.
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Affiliation(s)
- Bryan D Griffin
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Kar Muthumani
- The Wistar Institute, 3601 Spruce Street, Philadelphia, Pennsylvania 19104, USA
| | - Bryce M Warner
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Anna Majer
- Molecular Pathobiology, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada MB R3E 3R2
| | - Mable Hagan
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Jonathan Audet
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Derek R Stein
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Charlene Ranadheera
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Trina Racine
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Microbiology and Immunology, Faculty of Medicine, Laval University, 1050 avenue de la Médecine, Québec City, Québec, Canada G1V 0A6
| | - Marc-Antoine De La Vega
- Department of Microbiology and Immunology, Faculty of Medicine, Laval University, 1050 avenue de la Médecine, Québec City, Québec, Canada G1V 0A6
| | - Jocelyne Piret
- Research Center in Infectious Diseases of the CHU of Québec and Laval University, 2705 boulevard Laurier, Québec City, Quebec, Canada G1V 4G2
| | - Stephanie Kucas
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Veterinary Technical Services, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Kaylie N Tran
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Kathy L Frost
- Molecular Pathobiology, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada MB R3E 3R2
| | - Christine De Graff
- Veterinary Technical Services, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Geoff Soule
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Leanne Scharikow
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Jennifer Scott
- Heartland Fertility &Gynecology Clinic, 701-1661 Portage Avenue, Winnipeg, Manitoba, Canada R3J 3T7
| | - Gordon McTavish
- Heartland Fertility &Gynecology Clinic, 701-1661 Portage Avenue, Winnipeg, Manitoba, Canada R3J 3T7
| | - Valerie Smid
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3M4
| | - Young K Park
- GeneOne Life Science Inc., 223 Teheran-Ro, Gangnam-Gu, Seoul, Korea
| | - Joel N Maslow
- GeneOne Life Science Inc., 223 Teheran-Ro, Gangnam-Gu, Seoul, Korea
| | - Niranjan Y Sardesai
- Inovio Pharmaceuticals Inc., 660 West Germantown Pike, Plymouth Meeting, Pennsylvania 19462, USA
| | - J Joseph Kim
- Inovio Pharmaceuticals Inc., 660 West Germantown Pike, Plymouth Meeting, Pennsylvania 19462, USA
| | - Xiao-Jian Yao
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Alexander Bello
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Robbin Lindsay
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - Guy Boivin
- Research Center in Infectious Diseases of the CHU of Québec and Laval University, 2705 boulevard Laurier, Québec City, Quebec, Canada G1V 4G2
| | - Stephanie A Booth
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Molecular Pathobiology, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada MB R3E 3R2
| | - Darwyn Kobasa
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9
| | - Carissa Embury-Hyatt
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3M4
| | - David Safronetz
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, 745 Bannatyne Avenue, Winnipeg, Manitoba, Canada R3E 0J9.,Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, Manitoba, Canada R3E 3R2
| | - David B Weiner
- The Wistar Institute, 3601 Spruce Street, Philadelphia, Pennsylvania 19104, USA
| | - Gary P Kobinger
- Department of Microbiology and Immunology, Faculty of Medicine, Laval University, 1050 avenue de la Médecine, Québec City, Québec, Canada G1V 0A6.,Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, 3400 Spruce Street Philadelphia, Pennsylvania 19104-4238, USA
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Menasria R, Canivet C, Piret J, Gosselin J, Boivin G. Protective role of CX3CR1 signalling in resident cells of the central nervous system during experimental herpes simplex virus encephalitis. J Gen Virol 2017; 98:447-460. [PMID: 27902351 DOI: 10.1099/jgv.0.000667] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
CX3CR1 is an important chemokine receptor expressed on the surface of microglia and blood leukocytes, including monocytes. Signalling through this receptor influences the immune activity of microglia and monocyte trafficking into the central nervous system (CNS) in several neurological diseases. During experimental herpes simplex virus 1 (HSV-1) encephalitis (HSE), CX3CR1 deficiency has been reported to exacerbate the outcome of the disease. However, the precise contribution of CX3CR1 expressed in resident cells of the CNS or peripheral monocytes in protection against HSE remains unclear. To dissect the role of CX3CR1 during HSE, we reconstituted irradiated C57BL/6 WT and CX3CR1-/- mice with CX3CR1-/- (CX3CR1-/-→WT) and WT (WT→CX3CR1-/-) bone marrow cells, respectively. Our results showed that following intranasal infection with 1.2×106 p.f.u. of HSV-1, mortality rates were significantly higher in CX3CR1-/- (61.7 %) and WT→CX3CR1-/- (66.2 %) compared to WT (16.6 %; P=0.012 and P=0.016, respectively) and CX3CR1-/-→WT animals (20 %; P=0.013 and P=0.011, respectively). Higher mortality rates in CX3CR1-/- and WT→CX3CR1-/- mice were associated with increased infectious viral titres and wider HSV dissemination in brains, as well as an overproduction of inflammatory cytokines and chemokines including IL-1β, IL-6, IFN-γ, C-C motif ligand 2 and C-C motif ligand 5. Furthermore, CX3CR1 deficiency in resident cells of the CNS resulted in excessive and sustained Ly6Chi inflammatory monocyte and neutrophil infiltration into the brain. These data suggest that CX3CR1 deficiency in resident cells of the CNS affects mouse survival, HSV-1 replication control and cerebral inflammatory response whereas its deficiency in the haematopoietic system does not appear to influence the outcome of HSE.
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Affiliation(s)
- Rafik Menasria
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul Laurier, Quebec City, QC G1V 4G2, Canada
| | - Coraline Canivet
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul Laurier, Quebec City, QC G1V 4G2, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul Laurier, Quebec City, QC G1V 4G2, Canada
| | - Jean Gosselin
- Laboratory of Innate Immunology of the CHU of Quebec and Laval University, 2705 Boul Laurier, Quebec City, QC G1V 4G2, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases of the CHU of Quebec and Laval University, 2705 Boul Laurier, Quebec City, QC G1V 4G2, Canada
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Zarrouk K, Piret J, Boivin G. Herpesvirus DNA polymerases: Structures, functions and inhibitors. Virus Res 2017; 234:177-192. [PMID: 28153606 DOI: 10.1016/j.virusres.2017.01.019] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 01/10/2017] [Accepted: 01/22/2017] [Indexed: 11/25/2022]
Abstract
Human herpesviruses are large double-stranded DNA viruses belonging to the Herpesviridae family. These viruses have the ability to establish lifelong latency into the host and to periodically reactivate. Primary infections and reactivations of herpesviruses cause a large spectrum of diseases and may lead to severe complications in immunocompromised patients. The viral DNA polymerase is a key enzyme in the lytic phase of the infection by herpesviruses. This review focuses on the structures and functions of viral DNA polymerases of herpes simplex virus (HSV) and human cytomegalovirus (HCMV). DNA polymerases of HSV (UL30) and HCMV (UL54) belong to B family DNA polymerases with which they share seven regions of homology numbered I to VII as well as a δ-region C which is homologous to DNA polymerases δ. These DNA polymerases are multi-functional enzymes exhibiting polymerase, 3'-5' exonuclease proofreading and ribonuclease H activities. Furthermore, UL30 and UL54 DNA polymerases form a complex with UL42 and UL44 processivity factors, respectively. The mechanisms involved in their polymerisation activity have been elucidated based on structural analyses of the DNA polymerase of bacteriophage RB69 crystallized under different conformations, i.e. the enzyme alone or in complex with DNA and with both DNA and incoming nucleotide. All antiviral agents currently used for the prevention or treatment of HSV and HCMV infections target the viral DNA polymerases. However, long-term administration of these antivirals may lead to the emergence of drug-resistant isolates harboring mutations in genes encoding viral enzymes that phosphorylate drugs (i.e., nucleoside analogues) and/or DNA polymerases.
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Affiliation(s)
- Karima Zarrouk
- Research Center in Infectious Diseases, CHU de Québec and Laval University, Quebec City, Quebec, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases, CHU de Québec and Laval University, Quebec City, Quebec, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU de Québec and Laval University, Quebec City, Quebec, Canada.
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Menasria R, Canivet C, Piret J, Gosselin J, Boivin G. Both Cerebral and Hematopoietic Deficiencies in CCR2 Result in Uncontrolled Herpes Simplex Virus Infection of the Central Nervous System in Mice. PLoS One 2016; 11:e0168034. [PMID: 27930721 PMCID: PMC5145225 DOI: 10.1371/journal.pone.0168034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 11/23/2016] [Indexed: 12/11/2022] Open
Abstract
CCR2 is a chemokine receptor expressed on the surface of blood leukocytes, particularly «Ly6Chi» inflammatory monocytes and microglia. Signaling through this receptor is thought to influence the immune activity of microglia as well as monocytes egress from the bone marrow (BM) and their trafficking into the central nervous system (CNS) in several neurological diseases. During experimental herpes simplex virus 1 (HSV-1) encephalitis (HSE), CCR2 deficiency has been reported to exacerbate the outcome of the disease. However, the precise contribution of CCR2 expressed in cells of the CNS or peripheral monocytes in the protection against HSE remains unclear. To dissect the differential role of CCR2 during HSE, chimeric mice with receptor deficiency in the brain or blood cells were generated by transplanting wild-type (WT) C57BL/6 or CCR2-/- BM-derived cells in CCR2-/- (WT→CCR2-/-) and WT (CCR2-/-→WT) mice, respectively. Our results indicate that following intranasal infection with 1.2x106 plaque forming units of HSV-1, CCR2 deficiency in hematopoietic cells and, to a lesser extent, in CNS exacerbates the outcome of HSE. Mortality rates of CCR2-/- (71.4%) and CCR2-/-→WT (57.1%) mice were significantly higher than that of WT (15.3%; P<0.01 and P<0.05, respectively) but the difference did not reach statistical significance for WT→CCR2-/- animals (42.8%; P = 0.16). Both peripheral and CNS deficiencies in CCR2 resulted in increased infectious viral titers and wider dissemination of HSV antigens in the brain as well as an overproduction of inflammatory cytokines and chemokines including IL-1β, IL-6, CCL2, CCL3 and CCL5. Furthermore, CCR2 deficiency in the hematopoietic system altered monocytes egress from the BM and their recruitment to the CNS, which may contribute to the failure in HSV-1 containment. Collectively, these data suggest that CCR2 expressed on cells of CNS and especially on peripheral monocytes is important for the control of HSV-1 replication and inflammatory environment during experimental HSE.
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Affiliation(s)
- Rafik Menasria
- Research Center in Infectious Diseases, CHU of Quebec Research Center, Department of microbiology-immunology and infectious diseases, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Coraline Canivet
- Research Center in Infectious Diseases, CHU of Quebec Research Center, Department of microbiology-immunology and infectious diseases, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Jocelyne Piret
- Research Center in Infectious Diseases, CHU of Quebec Research Center, Department of microbiology-immunology and infectious diseases, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Jean Gosselin
- Laboratory of Innate Immunity, CHU of Quebec Research Center, Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU of Quebec Research Center, Department of microbiology-immunology and infectious diseases, Faculty of Medicine, Laval University, Quebec City, QC, Canada
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Drouot E, Piret J, Boivin G. Artesunate demonstrates in vitro synergism with several antiviral agents against human cytomegalovirus. Antivir Ther 2016; 21:535-539. [DOI: 10.3851/imp3028] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/20/2016] [Indexed: 10/22/2022]
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Connan D, Ectors F, Piret J, Antoine N, Grobet L. Efficient automatable and aseptic vitrification of human pluripotent stem cells using bio-safe and chemically defined media. Cryobiology 2015. [DOI: 10.1016/j.cryobiol.2015.10.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
Herpes simplex viruses are large double-stranded DNA viruses. These viruses have the ability to establish a lifelong latency in sensory ganglia and to invade and replicate in the CNS. Apart from relatively benign mucosal infections, HSV is responsible for severe illnesses including HSV encephalitis (HSE). HSE is the most common cause of sporadic, potentially fatal viral encephalitis in Western countries. If left untreated, the mortality rate associated with HSE is approximately 70%. Despite antiviral therapy, the mortality is still higher than 30%, and almost 60% of surviving individuals develop neurological sequelae. It is suggested that direct virus-related and indirect immune-mediated mechanisms contribute to the damages occurring in the CNS during HSE. In this manuscript, we describe the innate immune response to HSV, the development of HSE in mice knock-out for proteins of the innate immune system as well as inherited deficiencies in key components of the signaling pathways involved in the production of type I interferon that could predispose individuals to develop HSE. Finally, we review several immunomodulatory strategies aimed at modulating the innate immune response at a critical time after infection that were evaluated in mouse models and could be combined with antiviral therapy to improve the prognosis of HSE. In conclusion, the cerebral innate immune response that develops during HSE is a "double-edged sword" as it is critical to control viral replication in the brain early after infection, but, if left uncontrolled, may also result in an exaggerated inflammatory response that could be detrimental to the host.
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Affiliation(s)
- Jocelyne Piret
- Research Center in Infectious Diseases, CHU de Québec and Laval University, Quebec City, Quebec, Canada
| | - Guy Boivin
- Research Center in Infectious Diseases, CHU de Québec and Laval University, Quebec City, Quebec, Canada
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Nemery E, Gabriel A, Grulke S, Piret J, Toppets V, Antoine N. Mechanoreceptors in the Anterior Horn of the Equine Medial Meniscus: an Immunohistochemical Approach. Anat Histol Embryol 2015; 45:131-9. [PMID: 25904399 DOI: 10.1111/ahe.12181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/04/2015] [Indexed: 11/29/2022]
Abstract
Lameness due to stifle and especially meniscal lesions is frequent in equine species. In humans, mechanoreceptors involved in proprioceptive function are well studied. Given the high incidence of meniscal injuries in horses, and the lack of information concerning them in equine menisci, our objective was to study these corpuscles in six healthy anterior horns of the equine medial meniscus, which is the most common localisation reported for equine meniscal injuries. Immunohistochemical stainings were performed using antibodies against high molecular weight neurofilaments and glial fibrillary acidic proteins. From a purely fundamental point of view, our work highlights for the first time the presence of Ruffini, Pacini and Golgi corpuscles in equine meniscus. They were found, isolated or in clusters and always located at the vicinity of blood vessels, at the level of the anterior horn of the equine medial meniscus. This morphological approach could serve as a basis for clinical studies, to evaluate the impact of these corpuscles on the poor sportive prognosis in equine meniscal tears.
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Affiliation(s)
- E Nemery
- Anatomy Unit, Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster - B43a, Liège, B-4000, Belgium
| | - A Gabriel
- Anatomy Unit, Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster - B43a, Liège, B-4000, Belgium
| | - S Grulke
- Large Animal Surgical Section, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster -Equine Clinic B41, Liège, B-4000, Belgium
| | - J Piret
- Histology Unit, Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster - B43a, Liège, B-4000, Belgium
| | - V Toppets
- Histology Unit, Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster - B43a, Liège, B-4000, Belgium
| | - N Antoine
- Histology Unit, Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liège, 20 Boulevard de Colonster - B43a, Liège, B-4000, Belgium
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Kishore BK, Van Schepdael A, Laurent G, Lambricht P, Claes PJ, Piret J, Tulkens PM, Maldague P. Co-oxydextran as a protectant against gentamicin-induced renal lysosomal phospholipidosis and focal tubular necrosis. Perspectives and limitations. Contrib Nephrol 2015; 101:213-9. [PMID: 7682169 DOI: 10.1159/000422134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- B K Kishore
- Laboratoire de Chimie Physiologique, Université Catholique de Louvain, Belgium
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Shikh Alsook MK, Gabriel A, Salouci M, Piret J, Alzamel N, Moula N, Denoix JM, Antoine N, Baise E. Characterization of collagen fibrils after equine suspensory ligament injury: an ultrastructural and biochemical approach. Vet J 2015; 204:117-22. [PMID: 25795168 DOI: 10.1016/j.tvjl.2015.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 12/12/2014] [Accepted: 02/09/2015] [Indexed: 11/17/2022]
Abstract
Suspensory ligament (SL) injuries are an important cause of lameness in horses. The mechanical properties of connective tissue in normal and pathological ligaments are mainly related to fibril morphology, as well as collagen content and types. The purpose of this study was to evaluate, using biochemical and ultrastructural approaches, the alterations in collagen fibrils after injury. Eight Warmblood horses with visible signs of injury in only one forelimb SL were selected and specimens were examined by transmission electron microscope (TEM). Collagen types I, III and V were purified by differential salt precipitation after collagen extraction with acetic acid containing pepsin. TEM revealed abnormal organization as well as alterations in the diameter and shape of fibrils after SL injury. The bands corresponding to types I, III and V collagen were assessed by densitometry after sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Densitometric analysis indicated that the proportions of type III and type V collagen were higher (P < 0.001) in damaged tissues compared with normal tissues with a mean increase of 20.9% and 17.3%, respectively. Concurrently, a decrease (P < 0.001) in type I collagen within damaged tissues was recorded with a mean decrease of 15.2%. These alterations could be the hallmark of a decrease in the tissue quality and mechanical properties of the ligament. The findings provide new insight for subsequent research on tissue regeneration that may lead to the development of future treatment strategies for SL injury.
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Affiliation(s)
- M K Shikh Alsook
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
| | - A Gabriel
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Salouci
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J Piret
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Alzamel
- Pathology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Moula
- Sustainable Animal Production Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J-M Denoix
- CIRALE -14430 Goustranville, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Paris, France
| | - N Antoine
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - E Baise
- FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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Boivin N, Menasria R, Piret J, Rivest S, Boivin G. The combination of valacyclovir with an anti-TNF alpha antibody increases survival rate compared to antiviral therapy alone in a murine model of herpes simplex virus encephalitis. Antiviral Res 2014; 100:649-53. [PMID: 24416771 DOI: 10.1016/j.antiviral.2013.10.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The added benefit of combining valacyclovir (VACV), an antiviral agent, with etanercept (ETA), an anti-tumor necrosis factor alpha (TNF-α) antibody, for the treatment of herpes simplex virus type 1 (HSV-1) encephalitis (HSE) was evaluated in a mouse model. BALB/c mice were infected intranasally with 1.85 × 104 plaque forming units of HSV-1. Groups of mice received a single intraperitoneal injection of vehicle or ETA (400 μg/mouse) on day 3 post-infection combined or not with VACV (1 mg/ml of drinking water) from days 3 to 21 post-infection. On day 5 post-infection, groups of mice were sacrificed for determination of viral DNA load, detection of ETA in brain homogenates and for in situ hybridization. The survival rate of mice was significantly increased when VACV was administered in combination with ETA (38.5% for VACV vs 78.6% for combined treatment; P = 0.04) although VACV or ETA alone had no significant effect compared to the vehicle. The benefit of combined therapy was still present when treatment was delayed until day 4 post-infection. The viral DNA load was significantly reduced in mice treated with VACV alone (P < 0.01) or combined with ETA (P < 0.05) compared to the uninfected group whereas ETA alone had no effect. These results reinforce the notion that both virus-induced and immune-related mechanisms participate in the pathogenesis of HSE and suggest that potent antiviral agent could be combined with immune-based therapy, such as a TNF-α inhibitor, to improve prognosis of HSE.
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Affiliation(s)
- Nicolas Boivin
- Research Centers in Infectious Diseases CHUQ-CHUL and Laval University, Quebec City, QC, Canada
| | - Rafik Menasria
- Research Centers in Infectious Diseases CHUQ-CHUL and Laval University, Quebec City, QC, Canada
| | - Jocelyne Piret
- Research Centers in Infectious Diseases CHUQ-CHUL and Laval University, Quebec City, QC, Canada
| | - Serge Rivest
- Research Centers in Infectious Diseases CHUQ-CHUL and Laval University, Quebec City, QC, Canada
| | - Guy Boivin
- Research Centers in Infectious Diseases CHUQ-CHUL and Laval University, Quebec City, QC, Canada.
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Piret J, Boivin G. Antiviral drug resistance in herpesviruses other than cytomegalovirus. Rev Med Virol 2014; 24:186-218. [DOI: 10.1002/rmv.1787] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 01/23/2014] [Accepted: 01/29/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Jocelyne Piret
- Research Center in Infectious Diseases; Laval University; Quebec City QC Canada
| | - Guy Boivin
- Research Center in Infectious Diseases; Laval University; Quebec City QC Canada
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Bounaadja L, Piret J, Goyette N, Boivin G. Analysis of HHV-6 mutations in solid organ transplant recipients at the onset of cytomegalovirus disease and following treatment with intravenous ganciclovir or oral valganciclovir. J Clin Virol 2013; 58:279-82. [PMID: 23871165 DOI: 10.1016/j.jcv.2013.06.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 01/26/2023]
Abstract
BACKGROUND Human herpesvirus 6 (HHV-6) and human cytomegalovirus (HCMV) are major opportunistic pathogens in solid organ transplant (SOT) recipients. The use of antivirals for the treatment of HCMV disease can result in the development of drug resistance mutations in HCMV and also potentially in HHV-6. OBJECTIVES The emergence of HHV-6 drug resistance mutations was evaluated in SOT recipients at the onset of HCMV disease and following treatment with ganciclovir (GCV) or valganciclovir (VGCV). STUDY DESIGN Detection of HHV-6 was performed by real-time PCR from whole blood samples serially obtained from SOT recipients treated for HCMV disease with an induction dose of intravenous GCV or oral VGCV for 21 days followed by VGCV maintenance for 28 days in both arms. Baseline and last positive HHV-6 samples were tested for mutations in the genes encoding the protein kinase (U69) and the DNA polymerase (U38). RESULTS The rate of HHV-6 viraemia among SOT patients with HCMV disease at baseline was 3.2% (5/155). All isolates belonged to the HHV-6B species. Mutations L213I and Y479H were detected at baseline and at later times in the U69 kinase. Mutation L213I was previously reported as polymorphism whereas the role of mutation Y479H in drug resistance is unknown. Mutations D854E and E855Q found in the DNA polymerase were known as natural variants. CONCLUSIONS The incidence of HHV-6 viraemia in SOT recipients with established HCMV disease before initiation of antiviral therapy was low. Treatment with GCV or VGCV did not induce the emergence of HHV-6 drug resistance mutations.
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Affiliation(s)
- Lotfi Bounaadja
- Infectious Diseases Research Center of the CHU of Québec, and Laval University, Quebec City, Quebec, Canada G1V 4G2
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Shikh Alsook MK, Antoine N, Piret J, Moula N, Busoni V, Denoix JM, Gabriel A. Morphometric analyses of the body and the branches of the normal third interosseous muscle (suspensory ligament) in Standardbreds. Anat Histol Embryol 2013; 42:461-70. [PMID: 23464541 DOI: 10.1111/ahe.12038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 01/01/2013] [Indexed: 11/30/2022]
Abstract
The third interosseous muscle (suspensory ligament, TIOM) is composed of connective tissue (CT) with a variable proportion of muscle (MT) and adipose tissue (AT). The aim of our study is to quantify the CT, MT and AT within the body and the branches of right thoracic and pelvic limbs TIOM in sound horses to determine whether there are differences in CT, MT and AT between age, sex, limbs and levels. Right limbs from 11 sound horses were collected. Samples from 6 levels of the TIOM were embedded in paraffin or in Tissue-Tek(®) . Most of the paraffin sections were shredded. Using the cryosection, some artefacts appeared. Cryoprotection was carried out, which produced the best results. Hematoxylin-phloxine-saffron and Hematoxylin-eosin gave a good contrast of colours between the tissues observed allowing the use of an image analysis programme to calculate percentage of each tissue within the TIOM. The percentage of MT and AT decreased significantly (P < 0.0001), whereas the percentage of CT increased significantly (P < 0.0001) with age and when descending from the proximal to the distal level of the TIOM. The percentage of MT was significantly higher (P < 0.0001) in females than males, while the percentage of CT was significantly higher (P < 0.0001) in males than females. The percentage of AT was significantly higher (P = 0.0278) in pelvic limbs than in thoracic limbs. These results confirm the variation in tissue composition within the TIOM of sound horses.
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Affiliation(s)
- M K Shikh Alsook
- Department of Morphology and Pathology, Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
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Boivin N, Menasria R, Piret J, Boivin G. Modulation of TLR9 response in a mouse model of herpes simplex virus encephalitis. Antiviral Res 2012; 96:414-21. [PMID: 23043942 DOI: 10.1016/j.antiviral.2012.09.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 09/24/2012] [Accepted: 09/27/2012] [Indexed: 01/20/2023]
Abstract
We evaluated the effects of agonists and antagonist of toll-like receptor (TLR) 9 in comparison with a TLR3 agonist in a mouse model of herpes simplex virus type 1 (HSV-1) encephalitis (HSE). BALB/c mice received a single intranasal dose of either a TLR3 agonist (polyinosinic:polycytidylic acid; PIC), TLR9 agonists (oligodeoxynucleotides (ODNs) 1585, 1826 or 2395) or a TLR9 antagonist (ODN 2088), 1 day before and, for selected groups, 3 days after infection with HSV-1. Mice that received the pre-treatment with vehicle, PIC, ODNs 1585, 1826, 2395 and 2088 before infection had survival rates of 25%, 65%, 55%, 40%, 55% and 30%, respectively (P<0.05 for PIC and ODNs 1585 and 2395 versus vehicle). Infected mice subsequently treated with vehicle, ODNs 2395 and 2088 had survival rates of 9%, 0% and 30%, respectively (P<0.05, ODN 2088 versus other groups). The pre-treatment of mice with ODN 2395 reduced both the viral load (P<0.05 at day 5) and the production of CCL2, IL-6 and CCL5 at days 3, 4 and 5 (P<0.05 for IL-6 at day 3 and P<0.05 for CCL2 and CCL5 at day 4). Treatment of infected mice with ODN 2088 reduced the production of the same cytokines (P=0.07 for CCL2 and P=0.09 for IL-6 at day 5). Pre-treatment of mice with TLR9 agonists before infection reduces brain viral load and cytokine levels resulting in increased HSE survival rates. On the other hand, TLR9 antagonists can be helpful to control the inflammatory response that could be detrimental after infection.
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Affiliation(s)
- Nicolas Boivin
- Research Center in Infectious Diseases, CHUQ-CHUL and Laval University, Quebec City, QC, Canada.
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Sloma I, Imren S, Beer PA, Zhao Y, Lecault V, Leung D, Raghuram K, Brimacombe C, Lambie K, Piret J, Hansen C, Humphries RK, Eaves CJ. Ex vivo expansion of normal and chronic myeloid leukemic stem cells without functional alteration using a NUP98HOXA10homeodomain fusion gene. Leukemia 2012; 27:159-69. [PMID: 22868969 PMCID: PMC3542630 DOI: 10.1038/leu.2012.196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
HOX genes have been implicated as regulators of normal and leukemic stem cell functionality, but the extent to which these activities are linked is poorly understood. Previous studies revealed that transduction of primitive mouse hematopoietic cells with a NUP98HOXA10homeodomain (NA10HD) fusion gene enables a subsequent rapid and marked expansion in vitro of hematopoietic stem cell numbers without causing their transformation or deregulated expansion in vivo. To determine whether forced expression of NA10HD in primitive human cells would have a similar effect, we compared the number of long-term culture-initiating cells (LTC-ICs) present in cultures of lenti-NA10HD versus control virus-transduced CD34(+) cells originally isolated from human cord blood and chronic phase (CP) chronic myeloid leukemia (CML) patients. We found that NA10HD greatly increases outputs of both normal and Ph(+)/BCR-ABL(+) LTC-ICs, and this effect is particularly pronounced in cultures containing growth factor-producing feeders. Interestingly, NA10HD did not affect the initial cell cycle kinetics of the transduced cells nor their subsequent differentiation. Moreover, immunodeficient mice repopulated with NA10HD-transduced CP-CML cells for more than 8 months showed no evidence of altered behavior. Thus, NA10HD provides a novel tool to enhance both normal and CP-CML stem cell expansion in vitro, without apparently altering other properties.
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Affiliation(s)
- I Sloma
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
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Piret J, Bergeron MG. Should microbicides be controlled by women or by physicians? Int J Infect Dis 2010; 14 Suppl 3:e14-7. [PMID: 20932483 DOI: 10.1016/j.ijid.2010.02.2256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Revised: 10/19/2009] [Accepted: 02/25/2010] [Indexed: 11/24/2022] Open
Abstract
In 2007, nearly 7000 new cases of HIV infection occurred each day. There is a constant increase in the proportion of women newly infected with HIV in the global population; this increase is particularly high in some areas of the world such as sub-Saharan Africa. Microbicides are products that are being developed to empower women against HIV. First- and second-generation microbicides are broad-spectrum products that include surface active agents, vaginal defense enhancers, and blocking agents. Third-generation microbicides are HIV-specific and include replication and entry inhibitors formulated as gels or as vaginal rings. However, there is a concern that antiretroviral-based microbicides could lead to drug resistance if they are used by HIV-positive women who are unaware of their HIV status. To reach the highest number of women possible, microbicides should be available over-the-counter, which might not be the case with antiretroviral-based formulations. In contrast, non-antiretroviral-based microbicides will have the advantage of being initiated and controlled by women themselves and they will not jeopardize the use of life-saving drugs.
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Affiliation(s)
- Jocelyne Piret
- Centre de Recherche en Infectiologie, Université Laval, CHUQ, Pavillon CHUL, 2705 Boulevard Laurier, Québec, Canada.
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Mbopi-Keou FX, Trottier S, Omar RF, Nkele NN, Fokoua S, Mbu ER, Giguere JF, Domingo MC, Piret J, Tsague L, Zekeng L, Mwatha A, Mâsse B, Bergeron MG. A randomized, double-blind, placebo-controlled safety and acceptability study of two Invisible Condom® formulations in women from Cameroon. Contraception 2009; 80:484-92. [DOI: 10.1016/j.contraception.2009.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 03/05/2009] [Accepted: 03/31/2009] [Indexed: 11/16/2022]
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Piret J, Bergeron MG. HIV/AIDS therapy and prevention: The two solitudes. Can J Infect Dis Med Microbiol 2009; 20:e15-e18. [PMID: 20514153 PMCID: PMC2706402 DOI: 10.1155/2009/462643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 12/08/2008] [Indexed: 05/29/2023]
Affiliation(s)
| | - Michel G Bergeron
- Correspondence: Dr Michel G Bergeron, Centre de recherche en infectiologie, Centre Hospitalier Universitaire de Québec, Pavillon CHUL, 2705 Blvd Laurier, RC-709, Québec, Québec G1V 4G2. Telephone 418-654-2705, fax 418-654-2197, e-mail
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Piret J, Gourde P, Cormier H, Désormeaux A, Beauchamp D, Tremblay MJ, Juhász J, Bergeron MG. Efficacy of Gel Formulations Containing free and Liposomal Foscarnet in a Murine Model of Cutaneous HSV-1 Infection. J Liposome Res 2008. [DOI: 10.3109/08982109909024785] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Piret J, Laforest G, Bussières M, Bergeron MG. Subchronic (26- and 52-week) toxicity and irritation studies of a novel microbicidal gel formulation containing sodium lauryl sulfate in animal models. J Appl Toxicol 2008; 28:164-74. [PMID: 17549701 DOI: 10.1002/jat.1262] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The safety of an ethylene oxide/propylene oxide gel formulation containing sodium lauryl sulfate (2%, w/w), that could be a potent candidate as a topical microbicide, has been evaluated. More specifically, the subchronic (26- and 52-week) toxicity of the formulation when applied intravaginally as well as its irritating potential for the rectal, penile, eye, skin and buccal mucosa have been examined in animal models. The results showed that the vaginal administration of the gel formulation containing sodium lauryl sulfate once and twice daily (with doses 12 +/- 2 h apart) for 26 weeks to rats and for 52 weeks to rabbits induced slight to moderate histopathological alterations. When the formulation was applied intrarectally to male and female rabbits once and twice daily (with doses 12 +/- 2 h apart) for 14 days, no macroscopic or microscopic changes were reported. For both vaginal and rectal dosing, no effect was seen on the haematology, coagulation and serum chemistry parameters as well as on the body weight of animals and the relative organ weights. Other sporadic macroscopic and histopathological findings were incidental in origin and of no toxicological significance. The gel formulation containing sodium lauryl sulfate was considered as mildly irritating for the penile mucosa of rabbits, non-irritating for the eye of rabbits, mildly irritating for the skin in a rabbit model and non-irritating for the hamster cheek pouch. It is suggested that the gel formulation containing sodium lauryl sulfate is safe for most tissues that could be exposed to the product under normal use.
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Affiliation(s)
- Jocelyne Piret
- Centre de recherche en infectiologie, Laval University, Quebec, Quebec, Canada, G1V 4G2
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Piret J, Schanck A, Delfosse S, Van Bambeke F, Kishore BK, Tulkens PM, Mingeot-Leclercq MP. Modulation of the in vitro activity of lysosomal phospholipase A1 by membrane lipids. Chem Phys Lipids 2005; 133:1-15. [PMID: 15589222 DOI: 10.1016/j.chemphyslip.2004.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2004] [Revised: 08/06/2004] [Accepted: 08/19/2004] [Indexed: 11/21/2022]
Abstract
Lysosomal phospholipases play a critical role for degradation of cellular membranes after their lysosomal segregation. We investigated the regulation of lysosomal phospholipase A1 by cholesterol, phosphatidylethanolamine, and negatively-charged lipids in correlation with changes of biophysical properties of the membranes induced by these lipids. Lysosomal phospholipase A1 activity was determined towards phosphatidylcholine included in liposomes of variable composition using a whole-soluble lysosomal fraction of rat liver as enzymatic source. Phospholipase A1 activity was then related to membrane fluidity, lipid phase organization and membrane potential as determined by fluorescence depolarization of DPH, 31P NMR and capillary electrophoresis. Phospholipase A1 activity was markedly enhanced when the amount of negatively-charged lipids included in the vesicles was increased from 10 to around 30% of total phospholipids and the intensity of this effect depended on the nature of the acidic lipids used (ganglioside GM1<phosphatidylinositol approximately phosphatidylserine approximately phosphatidylglycerol approximately phosphatidylpropanol<phosphatidic acid). For liposomes containing phosphatidylinositol, this increase of activity was not modified by the presence of phosphatidylethanolamine and enhanced by cholesterol only when the phosphatidylinositol content was lower than 18%. Our results, therefore show that both the surface-negative charge and the nature of the acidic lipid included in bilayers modulate the activity of phospholipase A1 towards phosphatidylcholine, while the change in lipid hydration or in fluidity of membrane are less critical. These observations may have physiological implications with respect to the rate of degradation of cellular membranes after their lysosomal segregation.
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Affiliation(s)
- Jocelyne Piret
- Unité de Pharmacologie Cellulaire et Moléculaire, Université catholique de Louvain 73.70, Avenue E. Mounier 73, B-1200 Brussels, Belgium.
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Ramirez O, Krummen L, Piret J, Konstantinov K. Cell Culture Engineering IX. Biotechnol Prog 2005; 21:1. [PMID: 15913286 DOI: 10.1021/bp040039y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Haineault C, Gourde P, Perron S, Désormeaux A, Piret J, Omar RF, Tremblay RR, Bergeron MG. Thermoreversible gel formulation containing sodium lauryl sulfate as a potential contraceptive device. Biol Reprod 2003; 69:687-94. [PMID: 12724280 DOI: 10.1095/biolreprod.102.014043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The contraceptive properties of a gel formulation containing sodium lauryl sulfate were investigated in both in vitro and in vivo models. Results showed that sodium lauryl sulfate inhibited, in a concentration-dependent manner, the activity of sheep testicular hyaluronidase. Sodium lauryl sulfate also completely inhibited human sperm motility as evaluated by the 30-sec Sander-Cramer test. The acid-buffering capacity of gel formulations containing sodium lauryl sulfate increased with the molarity of the citrate buffers used for their preparations. Furthermore, experiments in which semen was mixed with undiluted gel formulations in different proportions confirmed their physiologically relevant buffering capacity. Intravaginal application of the gel formulation containing sodium lauryl sulfate to rabbits before their artificial insemination with freshly ejaculated semen completely prevented egg fertilization. The gel formulation containing sodium lauryl sulfate was fully compatible with nonlubricated latex condoms. Taken together, these results suggest that the gel formulation containing sodium lauryl sulfate could represent a potential candidate for use as a topical vaginal spermicidal formulation to provide fertility control in women.
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Affiliation(s)
- Caroline Haineault
- Centre de Recherche en Infectiologie, Université Laval, Québec, Québec, Canada G1V 4G2
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Piret J, Roy S, Gagnon M, Landry S, Désormeaux A, Omar RF, Bergeron MG. Comparative study of mechanisms of herpes simplex virus inactivation by sodium lauryl sulfate and n-lauroylsarcosine. Antimicrob Agents Chemother 2002; 46:2933-42. [PMID: 12183250 PMCID: PMC127445 DOI: 10.1128/aac.46.9.2933-2942.2002] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The mechanisms of herpes simplex virus (HSV) inactivation by sodium lauryl sulfate (SLS) and n-lauroylsarcosine (LS), two anionic surfactants with protein denaturant potency, have been evaluated in cultured cells. Results showed that pretreatment of HSV type 1 (HSV-1) strain F and HSV-2 strain 333 with either surfactant inhibited, in a concentration- and time-dependent manner, their infectivities on Vero cells. SLS was a more potent inhibitor of HSV-2 strain 333 infectivity than LS with respect to the concentration (4.8-fold lower) and time (2.4-fold shorter) required to completely inactivate the virus. No inhibition of both herpesvirus strains infectivities was observed when Vero cells were pretreated with either surfactant. LS prevented the binding of HSV-2 strain 333 to cells without affecting the stable attachment and the rate of penetration into cells, whereas SLS exerted the opposite effect. Both SLS and LS inhibited, in a concentration-dependent manner, the HSV-2 strain 333-induced cytopathic effect, probably by affecting newly synthesized virions that come into contact with surfactant molecules present in culture medium. The pretreatment of HSV-2 strain 333 with specific combinations of SLS and LS concentrations inhibited the viral infectivity in a synergistic manner and resulted in only a small increase in their toxicities for exponentially growing Vero cells compared with that caused by each compound alone. Taken together, these results suggest that SLS and LS, alone or combined, could represent potent candidates as microbicides in topical vaginal formulations to prevent the transmission of herpes and possibly other pathogens that cause sexually transmitted diseases, including human immunodeficiency virus type 1.
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Affiliation(s)
- Jocelyne Piret
- Centre de Recherche en Infectiologie, Université Laval, Québec, Québec, Canada
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Abstract
The number of individuals infected with human immunodeficiency virus (HIV) and other pathogens causing sexually transmitted diseases (STDs) is growing dramatically worldwide. Globally, heterosexual transmission may account for as much as 85-90% of new cases of HIV infection. Latex condoms represent an effective barrier against sexually transmitted pathogens, but unfortunately, their use is not generalized. Therefore, there is an urgent need to develop safe and potent topical microbicides under the control of women to efficiently reduce the spread of sexually transmitted infections. Sodium lauryl sulfate (SLS), an anionic surfactant with protein denaturing potency, is a potent inhibitor of the infectivity of several enveloped (Herpes simplex viruses, HIV-1, Semliki Forest virus) and nonenveloped (papillomaviruses, reovirus, rotavirus and poliovirus) viruses. The mechanism of action of SLS involves the solubilization of the viral envelope and/or the denaturation of envelope and/or capsid proteins. Studies have shown that SLS is not toxic for cultured cell lines of different origins at concentrations that inactivate HIV-1, herpes and human papillomavirus in vitro. In addition, intravaginal pretreatment of mice with a gel formulation containing SLS, completely protected animals against Herpes simplex virus type-2 infection. The gel formulation containing SLS was also well-tolerated following repeated intravaginal administrations to rabbits. Taken together, these data suggest that SLS represents a potential candidate for the use as a topical microbicide to prevent the sexual transmission of HIV-1, herpes, human papillomavirus and possibly other sexually transmitted pathogens. The impact of such a preventive tool on public health can be enormous.
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Affiliation(s)
- J Piret
- Centre de Recherche en Infectiologie, Université Laval, Quebec, Canada
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Roy S, Gourde P, Piret J, Désormeaux A, Lamontagne J, Haineault C, Omar RF, Bergeron MG. Thermoreversible gel formulations containing sodium lauryl sulfate or n-Lauroylsarcosine as potential topical microbicides against sexually transmitted diseases. Antimicrob Agents Chemother 2001; 45:1671-81. [PMID: 11353610 PMCID: PMC90530 DOI: 10.1128/aac.45.6.1671-1681.2001] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The microbicidal efficacies of two anionic surfactants, sodium lauryl sulfate (SLS) and n-lauroylsarcosine (LS), were evaluated in cultured cells and in a murine model of herpes simplex type 2 (HSV-2) intravaginal infection. In vitro studies showed that SLS and LS were potent inhibitors of the infectivity of HSV-2 strain 333. The concentrations of SLS which inhibit viral infectivity by 50% (50% inhibitory dose) and 90% (90% inhibitory dose) were 32.67 and 46.53 microM, respectively, whereas the corresponding values for LS were 141.76 and 225.30 microM. In addition, intravaginal pretreatment of mice with thermoreversible gel formulations containing 2.5% SLS or 2.5% LS prior to the inoculation of HSV-2 strain 333 completely prevented the development of genital herpetic lesions and the lethality associated with infection. Of prime interest, no infectious virus could be detected in mouse vaginal mucosa. Both formulations still provided significant protection when viral challenge was delayed until 1 h after pretreatment. Finally, intravaginal application of gel formulations containing 2.5% SLS or 2.5% LS once daily for 14 days to rabbits did not induce significant irritations to the genital mucosa, as demonstrated from macroscopic and histopathologic examinations. These results suggest that thermoreversible gel formulations containing SLS or LS could represent potent and safe topical microbicides for the prevention of HSV-2 and possibly other sexually transmitted pathogens, including human immunodeficiency virus.
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Affiliation(s)
- S Roy
- Centre de Recherche en Infectiologie, Université Laval, Québec, Québec, Canada
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Piret J, Gagné N, Perron S, Désormeaux A, Tremblay MJ, Gourde P, Omar RF, Bergeron AM. Thermoreversible gel as a candidate barrier to prevent the transmission of HIV-1 and herpes simplex virus type 2. Sex Transm Dis 2001; 28:484-91. [PMID: 11473223 DOI: 10.1097/00007435-200108000-00012] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Sexually transmitted diseases (STDs) caused by HIV, herpes simplex virus (HSV), and other pathogens are spreading dramatically. The need to develop active products and vehicles to reduce this epidemic is urgent. GOAL The efficacy of a thermoreversible gel formulation as a possible barrier to prevent the transmission of pathogens causing STDs was evaluated. STUDY DESIGN This evaluation investigated the ability of the gel formulation to prevent infection of susceptible cells by HIV-1 and HSV-2 in vitro, the diffusion of radiolabeled herpes virus and micelles of polymer through an insertion membrane, and the electron microscopic appearance of herpes virus and gel alone or mixed together. RESULTS The gel formulation prevents infection of susceptible cells by HIV-1 and HSV-2. It acts as an effective artificial physical barrier against the herpes virus within the first 4 hours of incubation. Herpes virus is coated by the gel or entrapped within micelles of the gel, which could hinder its attachment to target cells and inhibit its infectivity. CONCLUSION This thermoreversible gel formulation represents an attractive matrix for the incorporation of microbicides to prevent the spread of STDs.
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Affiliation(s)
- J Piret
- Centre de Recherche en Infectiologie, Université Laval, Québec, Québec, Canada
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