1
|
Zuiani A, Dulberger CL, De Silva NS, Marquette M, Lu YJ, Palowitch GM, Dokic A, Sanchez-Velazquez R, Schlatterer K, Sarkar S, Kar S, Chawla B, Galeev A, Lindemann C, Rothenberg DA, Diao H, Walls AC, Addona TA, Mensa F, Vogel AB, Stuart LM, van der Most R, Srouji JR, Türeci Ö, Gaynor RB, Şahin U, Poran A. A multivalent mRNA monkeypox virus vaccine (BNT166) protects mice and macaques from orthopoxvirus disease. Cell 2024; 187:1363-1373.e12. [PMID: 38366591 DOI: 10.1016/j.cell.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/13/2023] [Accepted: 01/12/2024] [Indexed: 02/18/2024]
Abstract
In response to the 2022 outbreak of mpox driven by unprecedented human-to-human monkeypox virus (MPXV) transmission, we designed BNT166, aiming to create a highly immunogenic, safe, accessible, and scalable next-generation vaccine against MPXV and related orthopoxviruses. To address the multiple viral forms and increase the breadth of immune response, two candidate multivalent mRNA vaccines were evaluated pre-clinically: a quadrivalent vaccine (BNT166a; encoding the MPXV antigens A35, B6, M1, H3) and a trivalent vaccine (BNT166c; without H3). Both candidates induced robust T cell responses and IgG antibodies in mice, including neutralizing antibodies to both MPXV and vaccinia virus. In challenge studies, BNT166a and BNT166c provided complete protection from vaccinia, clade I, and clade IIb MPXV. Furthermore, immunization with BNT166a was 100% effective at preventing death and at suppressing lesions in a lethal clade I MPXV challenge in cynomolgus macaques. These findings support the clinical evaluation of BNT166, now underway (NCT05988203).
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Özlem Türeci
- BioNTech SE, Mainz, Germany; HI-TRON - Helmholtz Institute for Translational Oncology Mainz by DKFZ, Mainz, Germany
| | | | - Uğur Şahin
- BioNTech SE, Mainz, Germany; TRON gGmbH - Translational Oncology at the University Medical Center of the Johannes Gutenberg University, Mainz, Germany.
| | | |
Collapse
|
2
|
Falendysz EA, Lopera JG, Rocke TE, Osorio JE. Monkeypox Virus in Animals: Current Knowledge of Viral Transmission and Pathogenesis in Wild Animal Reservoirs and Captive Animal Models. Viruses 2023; 15:v15040905. [PMID: 37112885 PMCID: PMC10142277 DOI: 10.3390/v15040905] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Mpox, formerly called monkeypox, is now the most serious orthopoxvirus (OPXV) infection in humans. This zoonotic disease has been gradually re-emerging in humans with an increasing frequency of cases found in endemic areas, as well as an escalating frequency and size of epidemics outside of endemic areas in Africa. Currently, the largest known mpox epidemic is spreading throughout the world, with over 85,650 cases to date, mostly in Europe and North America. These increased endemic cases and epidemics are likely driven primarily by decreasing global immunity to OPXVs, along with other possible causes. The current unprecedented global outbreak of mpox has demonstrated higher numbers of human cases and greater human-to-human transmission than previously documented, necessitating an urgent need to better understand this disease in humans and animals. Monkeypox virus (MPXV) infections in animals, both naturally occurring and experimental, have provided critical information about the routes of transmission; the viral pathogenicity factors; the methods of control, such as vaccination and antivirals; the disease ecology in reservoir host species; and the conservation impacts on wildlife species. This review briefly described the epidemiology and transmission of MPXV between animals and humans and summarizes past studies on the ecology of MPXV in wild animals and experimental studies in captive animal models, with a focus on how animal infections have informed knowledge concerning various aspects of this pathogen. Knowledge gaps were highlighted in areas where future research, both in captive and free-ranging animals, could inform efforts to understand and control this disease in both humans and animals.
Collapse
|
3
|
Americo JL, Earl PL, Moss B. Virulence differences of mpox (monkeypox) virus clades I, IIa, and IIb.1 in a small animal model. Proc Natl Acad Sci U S A 2023; 120:e2220415120. [PMID: 36787354 PMCID: PMC9974501 DOI: 10.1073/pnas.2220415120] [Citation(s) in RCA: 53] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/19/2023] [Indexed: 02/15/2023] Open
Abstract
Human mpox (monkeypox), a disease with similarities to smallpox, is endemic in Africa where it has persisted as a zoonosis with limited human-to-human spread. Unexpectedly, the disease expanded globally in 2022 driven by human-to-human transmission outside of Africa. It is not yet known whether the latter is due solely to behavioral and environmental factors or whether the mpox virus is adapting to a new host. Genome sequencing has revealed differences between the current outbreak strains, classified as clade IIb, and the prior clade IIa and clade I viruses, but whether these differences contribute to virulence or transmission has not been determined. We demonstrate that the wild-derived inbred castaneous mouse provides an exceptional animal model for investigating clade differences in mpox virus virulence and show that the order is clade I > clade IIa > clade IIb.1. The greatly reduced replication of the clade IIb.1 major outbreak strain in mice and absence of lethality at 100 times the lethal dose of a closely related clade IIa virus, despite similar multiplication in cell culture, suggest that clade IIb is evolving diminished virulence or adapting to other species.
Collapse
Affiliation(s)
- Jeffrey L. Americo
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20814
| | - Patricia L. Earl
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20814
| | - Bernard Moss
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20814
| |
Collapse
|
4
|
Interferon α/β Decoy Receptor Encoded by a Variant in the Dryvax Smallpox Vaccine Contributes to Virulence and Correlates with Severe Vaccine Side Effects. mBio 2022; 13:e0010222. [PMID: 35189701 PMCID: PMC8903894 DOI: 10.1128/mbio.00102-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Although providing long-lasting immunity, smallpox vaccination was associated with local and systemic reactions and rarely with severe complications, including progressive vaccinia and postvaccinia encephalitis. As the Dryvax smallpox vaccine consists of a population of variants, we investigated a particularly pathogenic isolate called clone 3 (CL3). Virus replication was monitored by inserting the gene encoding firefly luciferase (Luc) into the genomes of CL3 and ACAM2000, the second-generation smallpox vaccine derived from a less virulent clone. Greater luminescence occurred following intranasal or intraperitoneal inoculation of mice with CL3-Luc than ACAM2000-Luc. Previous genome sequencing of CL3 and ACAM2000 revealed numerous differences that could affect pathogenicity. We focused on a 4.2-kbp segment, containing several open reading frames, in CL3 that is absent from ACAM2000 and determined that lower virulence of the latter was associated with a truncation of the interferon α/β (IFN-α/β) decoy receptor. Truncation of the decoy receptor in CL3-Luc and repair of the truncated version in ACAM2000-Luc decreased and increased virulence, respectively. Blockade of the mouse type 1 IFN receptor increased the virulence of ACAM2000-Luc to that of CL3-Luc, consistent with the role of IFN in attenuating the former. The severities of disease following intracranial inoculation of immunocompetent mice and intraperitoneal inoculation of T cell-depleted mice were also greater in viruses expressing the full-length decoy receptor. Previous evidence for the low affinity of a similarly truncated decoy receptor for IFN and the presence of a full-length decoy receptor in virus isolated from a patient with progressive vaccinia support our findings.
Collapse
|
5
|
Morgan CN, Matheny AM, Nakazawa YJ, Kling C, Gallardo-Romero N, Seigler L, Barbosa Costa G, Hutson C, Maghlakelidze G, Olson V, Doty JB. Laboratory Infection of Novel Akhmeta Virus in CAST/EiJ Mice. Viruses 2020; 12:v12121416. [PMID: 33317132 PMCID: PMC7763702 DOI: 10.3390/v12121416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/22/2022] Open
Abstract
Akhmeta virus is a zoonotic Orthopoxvirus first identified in 2013 in the country of Georgia. Subsequent ecological investigations in Georgia have found evidence that this virus is widespread in its geographic distribution within the country and in its host-range, with rodents likely involved in its circulation in the wild. Yet, little is known about the pathogenicity of this virus in rodents. We conducted the first laboratory infection of Akhmeta virus in CAST/EiJ Mus musculus to further characterize this novel virus. We found a dose-dependent effect on mortality and weight loss (p < 0.05). Anti-orthopoxvirus antibodies were detected in the second- and third-highest dose groups (5 × 104 pfu and 3 × 102 pfu) at euthanasia by day 10, and day 14 post-infection, respectively. Anti-orthopoxvirus antibodies were not detected in the highest dose group (3 × 106 pfu), which were euthanized at day 7 post-infection and had high viral load in tissues, suggesting they succumbed to disease prior to mounting an effective immune response. In order of highest burden, viable virus was detected in the nostril, lung, tail, liver and spleen. All individuals tested in the highest dose groups were DNAemic. Akhmeta virus was highly pathogenic in CAST/EiJ Mus musculus, causing 100% mortality when ≥3 × 102 pfu was administered.
Collapse
Affiliation(s)
- Clint N. Morgan
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
- Correspondence: ; Tel.: +1-404-639-0844
| | - Audrey M. Matheny
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
- Oak Ridge Institute for Science and Education, CDC Fellowship Program, Oak Ridge, TN 37830, USA
| | - Yoshinori J. Nakazawa
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
| | - Chantal Kling
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
- Oak Ridge Institute for Science and Education, CDC Fellowship Program, Oak Ridge, TN 37830, USA
| | - Nadia Gallardo-Romero
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
| | - Laurie Seigler
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
- Kāpili Services, LLC, An Alaka’ina Foundation Company, Honolulu, HI 96814, USA
| | - Galileu Barbosa Costa
- Núcleo de Epidemiologia e Bioestatística, Centro de Pesquisas Gonçalo Moniz, Fiocruz, Bahia 40296-710, Brazil;
| | - Christina Hutson
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
| | - Giorgi Maghlakelidze
- U.S. Centers for Disease Control and Prevention, South Caucuses Office, Tbilisi 0177, Georgia;
| | - Victoria Olson
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
| | - Jeffrey B. Doty
- Poxvirus & Rabies Branch, National Center for Emerging Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Division of High-Consequence Pathogens & Pathology, Atlanta, GA 30329, USA; (A.M.M.); (Y.J.N.); (C.K.); (N.G.-R.); (L.S.); (C.H.); (V.O.); (J.B.D.)
| |
Collapse
|
6
|
Alakunle E, Moens U, Nchinda G, Okeke MI. Monkeypox Virus in Nigeria: Infection Biology, Epidemiology, and Evolution. Viruses 2020; 12:E1257. [PMID: 33167496 PMCID: PMC7694534 DOI: 10.3390/v12111257] [Citation(s) in RCA: 353] [Impact Index Per Article: 88.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/22/2020] [Accepted: 10/30/2020] [Indexed: 12/16/2022] Open
Abstract
Monkeypox is a zoonotic disease caused by monkeypox virus (MPXV), which is a member of orthopoxvirus genus. The reemergence of MPXV in 2017 (at Bayelsa state) after 39 years of no reported case in Nigeria, and the export of travelers' monkeypox (MPX) from Nigeria to other parts of the world, in 2018 and 2019, respectively, have raised concern that MPXV may have emerged to occupy the ecological and immunological niche vacated by smallpox virus. This review X-rays the current state of knowledge pertaining the infection biology, epidemiology, and evolution of MPXV in Nigeria and worldwide, especially with regard to the human, cellular, and viral factors that modulate the virus transmission dynamics, infection, and its maintenance in nature. This paper also elucidates the role of recombination, gene loss and gene gain in MPXV evolution, chronicles the role of signaling in MPXV infection, and reviews the current therapeutic options available for the treatment and prevention of MPX. Additionally, genome-wide phylogenetic analysis was undertaken, and we show that MPXV isolates from recent 2017 outbreak in Nigeria were monophyletic with the isolate exported to Israel from Nigeria but do not share the most recent common ancestor with isolates obtained from earlier outbreaks, in 1971 and 1978, respectively. Finally, the review highlighted gaps in knowledge particularly the non-identification of a definitive reservoir host animal for MPXV and proposed future research endeavors to address the unresolved questions.
Collapse
Affiliation(s)
- Emmanuel Alakunle
- Department of Natural and Environmental Sciences, Biomedical Science Concentration, School of Arts and Sciences, American University of Nigeria, 98 Lamido Zubairu Way, PMB 2250 Yola, Nigeria;
| | - Ugo Moens
- Molecular Inflammation Research Group, Institute of Medical Biology, University i Tromsø (UIT)—The Arctic University of Norway, N-9037 Tromsø, Norway;
| | - Godwin Nchinda
- Laboratory of Vaccinology and Immunology, The Chantal Biya International Reference Center for Research on the Prevention and Management HIV/AIDS (CIRCB), P.O Box 3077 Yaoundé-Messa, Cameroon;
- Department of Pharmaceutical Microbiology & Biotechnology, Faculty of Pharmaceutical Sciences, Nnamdi Azikiwe University, P.O Box 420110 Awka, Nigeria
| | - Malachy Ifeanyi Okeke
- Department of Natural and Environmental Sciences, Biomedical Science Concentration, School of Arts and Sciences, American University of Nigeria, 98 Lamido Zubairu Way, PMB 2250 Yola, Nigeria;
| |
Collapse
|
7
|
IMVAMUNE ® and ACAM2000 ® Provide Different Protection against Disease When Administered Postexposure in an Intranasal Monkeypox Challenge Prairie Dog Model. Vaccines (Basel) 2020; 8:vaccines8030396. [PMID: 32698399 PMCID: PMC7565152 DOI: 10.3390/vaccines8030396] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 02/07/2023] Open
Abstract
The protection provided by smallpox vaccines when used after exposure to Orthopoxviruses is poorly understood. Postexposu re administration of 1st generation smallpox vaccines was effective during eradication. However, historical epidemiological reports and animal studies on postexposure vaccination are difficult to extrapolate to today’s populations, and 2nd and 3rd generation vaccines, developed after eradication, have not been widely tested in postexposure vaccination scenarios. In addition to concerns about preparedness for a potential malevolent reintroduction of variola virus, humans are becoming increasingly exposed to naturally occurring zoonotic orthopoxviruses and, following these exposures, disease severity is worse in individuals who never received smallpox vaccination. This study investigated whether postexposure vaccination of prairie dogs with 2nd and 3rd generation smallpox vaccines was protective against monkeypox disease in four exposure scenarios. We infected animals with monkeypox virus at doses of 104 pfu (2× LD50) or 106 pfu (170× LD50) and vaccinated the animals with IMVAMUNE® or ACAM2000® either 1 or 3 days after challenge. Our results indicated that postexposure vaccination protected the animals to some degree from the 2× LD50, but not the 170× LD5 challenge. In the 2× LD50 challenge, we also observed that administration of vaccine at 1 day was more effective than administration at 3 days postexposure for IMVAMUNE®, but ACAM2000® was similarly effective at either postexposure vaccination time-point. The effects of postexposure vaccination and correlations with survival of total and neutralizing antibody responses, protein targets, take formation, weight loss, rash burden, and viral DNA are also presented.
Collapse
|
8
|
Earl PL, Americo JL, Moss B. Natural killer cells expanded in vivo or ex vivo with IL-15 overcomes the inherent susceptibility of CAST mice to lethal infection with orthopoxviruses. PLoS Pathog 2020; 16:e1008505. [PMID: 32320436 PMCID: PMC7197867 DOI: 10.1371/journal.ppat.1008505] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 05/04/2020] [Accepted: 03/26/2020] [Indexed: 02/05/2023] Open
Abstract
The wild-derived inbred CAST/EiJ mouse, one of eight founder strains in the Collaborative Cross panel, is an exceptional model for studying monkeypox virus (MPXV), an emerging human pathogen, and other orthopoxviruses including vaccinia virus (VACV). Previous studies suggested that the extreme susceptibility of the CAST mouse to orthopoxviruses is due to an insufficient innate immune response. Here, we focused on the low number of natural killer (NK) cells in the naïve CAST mouse as a contributing factor to this condition. Administration of IL-15 to CAST mice transiently increased NK and CD8+ T cells that could express IFN-γ, indicating that the progenitor cells were capable of responding to cytokines. However, the number of NK cells rapidly declined indicating a defect in their homeostasis. Furthermore, IL-15-treated mice were protected from an otherwise lethal challenge with VACV or MPXV. IL-15 decreased virus spread and delayed death even when CD4+/CD8+ T cells were depleted with antibody, supporting an early protective role of the expanded NK cells. Purified splenic NK cells from CAST mice proliferated in vitro in response to IL-15 and could be activated with IL-12/IL-18 to secrete interferon-γ. Passive transfer of non-activated or activated CAST NK cells reduced VACV spread but only the latter completely prevented death at the virus dose used. Moreover, antibodies to interferon-γ abrogated the protection by activated NK cells. Thus, the inherent susceptibility of CAST mice to orthopoxviruses can be explained by a low level of NK cells and this vulnerability can be overcome either by expanding their NK cells in vivo with IL-15 or by passive transfer of purified NK cells that were expanded and activated in vitro. With the eradication of smallpox, monkeypox virus (MPXV) remains the only poxvirus causing significant mortality in humans. Although endemic in parts of Africa, human infections have occurred in the United States, the United Kingdom and Israel due to travelers or imported animals. Contrary to its name, MPXV primarily infects rodents and secondarily infects humans and other primates. The wild-derived CAST mouse is an excellent small animal model for studying the pathogenicity of MPXV and related orthopoxviruses including vaccinia virus (VACV) and for evaluating therapeutics. We previously found that the susceptibility of CAST mice is correlated with low numbers of natural killer (NK) cells and a delayed interferon-γ response. Here we showed that in vivo administration of the cytokine IL-15 transiently raised NK cell numbers and protected CAST mice from systemic infections with VACV and MPXV. CAST mouse NK cells that were purified and expanded in vitro with IL-15 also provided protection, further demonstrating the important role of NK cells. The rapid decline in NK cell numbers following cessation of IL-15 administration or NK cell transfer suggests that a low level of NK cell homeostasis contributes to the susceptibility of CAST mice to virus infection.
Collapse
Affiliation(s)
- Patricia L. Earl
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Jeffrey L. Americo
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Bernard Moss
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| |
Collapse
|
9
|
Ventura JD, Beloor J, Allen E, Zhang T, Haugh KA, Uchil PD, Ochsenbauer C, Kieffer C, Kumar P, Hope TJ, Mothes W. Longitudinal bioluminescent imaging of HIV-1 infection during antiretroviral therapy and treatment interruption in humanized mice. PLoS Pathog 2019; 15:e1008161. [PMID: 31805155 PMCID: PMC6917343 DOI: 10.1371/journal.ppat.1008161] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/17/2019] [Accepted: 10/29/2019] [Indexed: 12/24/2022] Open
Abstract
Non-invasive bioluminescent imaging (NIBLI) of HIV-1 infection dynamics allows for real-time monitoring of viral spread and the localization of infected cell populations in living animals. In this report, we describe full-length replication-competent GFP and Nanoluciferase (Nluc) expressing HIV-1 reporter viruses from two clinical transmitted / founder (T/F) strains: TRJO.c and Q23.BG505. By infecting humanized mice with these HIV-1 T/F reporter viruses, we were able to directly monitor longitudinal viral spread at whole-animal resolution via NIBLI at a sensitivity of as few as 30-50 infected cells. Bioluminescent signal strongly correlated with HIV-1 infection and responded proportionally to virus suppression in vivo in animals treated daily with a combination antiretroviral therapy (cART) regimen. Longitudinal NIBLI following cART withdrawal visualized tissue-sites that harbored virus during infection recrudescence. Notably, we observed rebounding infection in the same lymphoid tissues where infection was first observed prior to ART treatment. Our work demonstrates the utility of our system for studying in vivo viral infection dynamics and identifying infected tissue regions for subsequent analyses.
Collapse
Affiliation(s)
- John D. Ventura
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, United States of America
| | - Jagadish Beloor
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States of America
| | - Edward Allen
- Department of Cellular and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States of America
| | - Tongyu Zhang
- School of Molecular and Cellular Biology, College of Liberal Arts and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Kelsey A. Haugh
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, United States of America
| | - Pradeep D. Uchil
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, United States of America
| | - Christina Ochsenbauer
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Collin Kieffer
- School of Molecular and Cellular Biology, College of Liberal Arts and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Priti Kumar
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States of America
| | - Thomas J. Hope
- Department of Cellular and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States of America
| | - Walther Mothes
- Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT, United States of America
| |
Collapse
|
10
|
Reynolds MG, Doty JB, McCollum AM, Olson VA, Nakazawa Y. Monkeypox re-emergence in Africa: a call to expand the concept and practice of One Health. Expert Rev Anti Infect Ther 2019; 17:129-139. [PMID: 30625020 PMCID: PMC6438170 DOI: 10.1080/14787210.2019.1567330] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 01/03/2019] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Monkeypox is a re-emerging viral zoonosis that occurs naturally in heavily forested regions of West and Central Africa. Inter-human transmission of monkeypox virus, although limited, drives outbreaks, particularly in household and health-care settings. But the available evidence suggests that without repeated zoonotic introductions, human infections would eventually cease to occur. Therefore, interrupting virus transmission from animals to humans is key to combating this disease. Areas covered: Herein we review laboratory and field studies examining the susceptibility of various animal taxa to monkeypox virus infection, and note the competence of various species to serve as reservoirs or transmission hosts. In addition, we discuss early socio-ecologic theories of monkeypox virus transmission in rural settings and review current modes of ecologic investigation - including ecologic niche modeling, and ecologic sampling - in light of their potential to identify specific animal species and features of the environment that are associated with heightened risk for human disease. Expert opinion: The role of disease ecology and scientific research in ongoing disease prevention efforts should be reinforced, particularly for wildlife-associated zoonoses such as monkeypox. Such efforts alongside those aimed at nurturing 'One Health' collaborations may ultimately hold the greatest promise for reducing human infections with this pathogen.
Collapse
Affiliation(s)
- Mary G. Reynolds
- US Centers for Disease Control and Prevention, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Jeffry B. Doty
- US Centers for Disease Control and Prevention, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Andrea M. McCollum
- US Centers for Disease Control and Prevention, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Victoria A. Olson
- US Centers for Disease Control and Prevention, Poxvirus and Rabies Branch, Atlanta, GA, USA
| | - Yoshinori Nakazawa
- US Centers for Disease Control and Prevention, Poxvirus and Rabies Branch, Atlanta, GA, USA
| |
Collapse
|
11
|
Perdiguero B, Gómez CE, Esteban M. Bioluminescence Imaging as a Tool for Poxvirus Biology. Methods Mol Biol 2019; 2023:269-285. [PMID: 31240684 DOI: 10.1007/978-1-4939-9593-6_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Bioluminescence imaging, with luciferase as a reporter-encoding gene, has been successfully and widely used for studies to follow viral infection in an organism and to measure therapeutic efficacy of antiviral agents in small animal models. Bioluminescence is produced by the reaction of a luciferase enzyme stably inserted into the viral genome with a defined substrate systemically delivered into the animal. The light emitted is captured allowing the detection of viral infection sites and the quantification of viral replication in the context of tissues of a living animal. The goal of this chapter is to provide a technical background for the evaluation of poxvirus infection in cells and animals through bioluminescence imaging technology using luciferase-expressing recombinant poxviruses.
Collapse
Affiliation(s)
- Beatriz Perdiguero
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, CSIC, Madrid, Spain
| | - Carmen Elena Gómez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, CSIC, Madrid, Spain
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, CSIC, Madrid, Spain.
| |
Collapse
|
12
|
Poltorak A, Apalko S, Sherbak S. Wild-derived mice: from genetic diversity to variation in immune responses. Mamm Genome 2018; 29:577-584. [PMID: 30056578 DOI: 10.1007/s00335-018-9766-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 07/23/2018] [Indexed: 10/28/2022]
Abstract
Classical inbred mouse strains have historically been instrumental in mapping immunological traits. However, most of the classical strains originate from a relatively limited number of founder animals, largely within the Mus musculus domesticus subspecies. Therefore, their genetic diversity is ultimately limited. For this reason, it is not feasible to use these mice for exhaustive interrogation of immune signaling pathways. In order to investigate networks through forward genetic analysis, larger genetic diversity is required than is introduced under laboratory conditions. Recently, inbred strains from other mouse subspecies were established such as Mus musculus castaneus and Mus musculus musculus, which diverged from a shared common ancestor with Mus musculus domesticus more than one million years ago. A direct genomic comparison clearly demonstrates the evolutionary divergence that has occurred between wild-derived mice and the classical inbred strains. When compared to classical inbred strains, wild-derived mice exhibit polymorphisms every 100-200 base pairs. Studying the molecular basis of these traits provides us with insight into how the immune system can evolve regulatory features to accommodate environment-specific constraints. Because most wild-derived strains are able to breed with classical inbred mice, they represent a rich source of evolutionarily significant diversity for forward genetic studies. These organisms are an emerging, though still largely unexplored, model for the identification and study of novel immunological genes.
Collapse
Affiliation(s)
- Alexander Poltorak
- Department of Immunology, Tufts University, Boston, MA, 02111, USA. .,Petrozavodsk State University, Karelia, Russian Federation.
| | | | - Sergei Sherbak
- City Hospital, 40, St. Petersburg, Russian Federation.,St. Petersburg State University, St. Petersburg, Russian Federation
| |
Collapse
|
13
|
Avci P, Karimi M, Sadasivam M, Antunes-Melo WC, Carrasco E, Hamblin MR. In-vivo monitoring of infectious diseases in living animals using bioluminescence imaging. Virulence 2017; 9:28-63. [PMID: 28960132 PMCID: PMC6067836 DOI: 10.1080/21505594.2017.1371897] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Traditional methods of localizing and quantifying the presence of pathogenic microorganisms in living experimental animal models of infections have mostly relied on sacrificing the animals, dissociating the tissue and counting the number of colony forming units. However, the discovery of several varieties of the light producing enzyme, luciferase, and the genetic engineering of bacteria, fungi, parasites and mice to make them emit light, either after administration of the luciferase substrate, or in the case of the bacterial lux operon without any exogenous substrate, has provided a new alternative. Dedicated bioluminescence imaging (BLI) cameras can record the light emitted from living animals in real time allowing non-invasive, longitudinal monitoring of the anatomical location and growth of infectious microorganisms as measured by strength of the BLI signal. BLI technology has been used to follow bacterial infections in traumatic skin wounds and burns, osteomyelitis, infections in intestines, Mycobacterial infections, otitis media, lung infections, biofilm and endodontic infections and meningitis. Fungi that have been engineered to be bioluminescent have been used to study infections caused by yeasts (Candida) and by filamentous fungi. Parasitic infections caused by malaria, Leishmania, trypanosomes and toxoplasma have all been monitored by BLI. Viruses such as vaccinia, herpes simplex, hepatitis B and C and influenza, have been studied using BLI. This rapidly growing technology is expected to continue to provide much useful information, while drastically reducing the numbers of animals needed in experimental studies.
Collapse
Affiliation(s)
- Pinar Avci
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,b Department of Dermatology , Harvard Medical School , Boston , MA , USA
| | - Mahdi Karimi
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,c Department of Medical Nanotechnology , School of Advanced Technologies in Medicine, Iran University of Medical Sciences , Tehran , Iran.,d Cellular and Molecular Research Center, Iran University of Medical Sciences , Tehran , Iran
| | - Magesh Sadasivam
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,e Amity Institute of Nanotechnology, Amity University Uttar Pradesh , Noida , India
| | - Wanessa C Antunes-Melo
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,f University of Sao Paulo , Sao Carlos-SP , Brazil
| | - Elisa Carrasco
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,g Department of Biosciences , Durham University , Durham , United Kingdom
| | - Michael R Hamblin
- a Wellman Center for Photomedicine, Massachusetts General Hospital , Boston , MA , USA.,b Department of Dermatology , Harvard Medical School , Boston , MA , USA.,h Harvard-MIT Division of Health Sciences and Technology , Cambridge , MA , USA
| |
Collapse
|
14
|
Insufficient Innate Immunity Contributes to the Susceptibility of the Castaneous Mouse to Orthopoxvirus Infection. J Virol 2017; 91:JVI.01042-17. [PMID: 28747505 DOI: 10.1128/jvi.01042-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 07/19/2017] [Indexed: 11/20/2022] Open
Abstract
The castaneous (CAST) mouse, a wild-derived inbred strain, is highly susceptible to orthopoxvirus infection by intranasal and systemic routes. The 50% lethal intraperitoneal dose of vaccinia virus (VACV) was 3 PFU for CAST mice, whereas BALB/c mice survived 106 PFU. At all times and in all organs analyzed, virus titers were higher in CAST than in BALB/c mice. In individual CAST mice, luciferase-expressing VACV was seen to replicate rapidly leading to death, whereas virus levels increased for a few days and then declined in BALB/c mice. Increases in gamma interferon (IFN-γ) and tumor necrosis factor alpha (TNF-α) were delayed and low in CAST mice compared to BALB/c mice following VACV infection or poly(I-C) inoculation, consistent with differences in innate immune responses. In addition, naive CAST mice had considerably lower numbers of NK and T cells than BALB/c mice. The percentage of IFN-γ-producing CD4+ and CD8+ T cells increased following infection of CAST mice only after considerable virus spread, and the absolute cell numbers remained low. Administration of exogenous IFN-γ or -α to CAST mice before or during the first days of infection suppressed virus replication and prolonged survival, allowing the mice to make adaptive CD4+ and CD8+ T cell responses that were necessary to clear the virus after cessation of interferon treatment. Thus, insufficient innate cytokine and cellular immune responses contribute to the unique susceptibility of CAST mice to VACV, whereas the adaptive immune response can be protective only if virus replication is suppressed during the first several days of infection.IMPORTANCE Most inbred mouse strains are relatively resistant to orthopoxviruses. The castaneous (CAST) mouse is a notable exception, exhibiting extreme vulnerability to monkeypox virus, cowpox virus, and vaccinia virus and thus providing a unique model for studying pathogenicity, immunity, vaccines, and antiviral drugs. To fully utilize the CAST mouse for such purposes, it is necessary to understand the basis for virus susceptibility. We showed that naive CAST mice make low IFN-γ and TNF-α responses and have low levels of NK cells and CD4+ and CD8+ T cells compared to a resistant classical inbred mouse strain. Attenuating virus replication with one or more doses of exogenous IFN-α or -γ before or during the first few days of infection enabled the development of adaptive cellular immunity and clearance of virus. Further genetic studies may reveal the basis for the low innate immunity.
Collapse
|
15
|
Falendysz EA, Lopera JG, Doty JB, Nakazawa Y, Crill C, Lorenzsonn F, Kalemba LN, Ronderos MD, Mejia A, Malekani JM, Karem K, Carroll DS, Osorio JE, Rocke TE. Characterization of Monkeypox virus infection in African rope squirrels (Funisciurus sp.). PLoS Negl Trop Dis 2017; 11:e0005809. [PMID: 28827792 PMCID: PMC5578676 DOI: 10.1371/journal.pntd.0005809] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 08/31/2017] [Accepted: 07/17/2017] [Indexed: 12/18/2022] Open
Abstract
Monkeypox (MPX) is a zoonotic disease endemic in Central and West Africa and is caused by Monkeypox virus (MPXV), the most virulent Orthopoxvirus affecting humans since the eradication of Variola virus (VARV). Many aspects of the MPXV transmission cycle, including the natural host of the virus, remain unknown. African rope squirrels (Funisciurus spp.) are considered potential reservoirs of MPXV, as serosurveillance data in Central Africa has confirmed the circulation of the virus in these rodent species [1,2]. In order to understand the tissue tropism and clinical signs associated with infection with MPXV in these species, wild-caught rope squirrels were experimentally infected via intranasal and intradermal exposure with a recombinant MPXV strain from Central Africa engineered to express the luciferase gene. After infection, we monitored viral replication and shedding via in vivo bioluminescent imaging, viral culture and real time PCR. MPXV infection in African rope squirrels caused mortality and moderate to severe morbidity, with clinical signs including pox lesions in the skin, eyes, mouth and nose, dyspnea, and profuse nasal discharge. Both intranasal and intradermal exposures induced high levels of viremia, fast systemic spread, and long periods of viral shedding. Shedding and luminescence peaked at day 6 post infection and was still detectable after 15 days. Interestingly, one sentinel animal, housed in the same room but in a separate cage, also developed severe MPX disease and was euthanized. This study indicates that MPXV causes significant pathology in African rope squirrels and infected rope squirrels shed large quantities of virus, supporting their role as a potential source of MPXV transmission to humans and other animals in endemic MPX regions.
Collapse
Affiliation(s)
- Elizabeth A. Falendysz
- US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, United States of America
| | - Juan G. Lopera
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Jeffrey B. Doty
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Yoshinori Nakazawa
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Colleen Crill
- US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, United States of America
| | - Faye Lorenzsonn
- US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, United States of America
| | | | - Monica D. Ronderos
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Andres Mejia
- Animal Services (Pathology), Wisconsin National Primate Research Center, University of Wisconsin, Madison, Wisconsin, United States of America
| | | | - Kevin Karem
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Darin S. Carroll
- Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Jorge E. Osorio
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Tonie E. Rocke
- US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, United States of America
| |
Collapse
|
16
|
Lorenzo MM, Sanchez-Puig JM, Blasco R. Vaccinia virus and Cowpox virus are not susceptible to the interferon-induced antiviral protein MxA. PLoS One 2017; 12:e0181459. [PMID: 28727764 PMCID: PMC5519081 DOI: 10.1371/journal.pone.0181459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 06/19/2017] [Indexed: 12/16/2022] Open
Abstract
MxA protein is expressed in response to type I and type III Interferon and constitute an important antiviral factor with broad antiviral activity to diverse RNA viruses. In addition, some studies expand the range of MxA antiviral activity to include particular DNA viruses like Monkeypox virus (MPXV) and African Swine Fever virus (ASFV). However, a broad profile of activity of MxA to large DNA viruses has not been established to date. Here, we investigated if some well characterized DNA viruses belonging to the Poxviridae family are sensitive to human MxA. A cell line inducibly expressing MxA to inhibitory levels showed no anti-Vaccinia virus (VACV) virus activity, indicating either lack of susceptibility of the virus, or the existence of viral factors capable of counteracting MxA inhibition. To determine if VACV resistance to MxA was due to a virus-encoded anti-MxA activity, we performed coinfections of VACV and the MxA-sensitive Vesicular Stomatitis virus (VSV), and show that VACV does not protect VSV from MxA inhibition in trans. Those results were extended to several VACV strains and two CPXV strains, thus confirming that those Orthopoxviruses do not block MxA action. Overall, these results point to a lack of susceptibility of the Poxviridae to MxA antiviral activity.
Collapse
Affiliation(s)
- María M. Lorenzo
- Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (I.N.I.A.), Madrid, Spain
| | - Juana M. Sanchez-Puig
- Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (I.N.I.A.), Madrid, Spain
| | - Rafael Blasco
- Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (I.N.I.A.), Madrid, Spain
- * E-mail:
| |
Collapse
|
17
|
Novel Nonreplicating Vaccinia Virus Vector Enhances Expression of Heterologous Genes and Suppresses Synthesis of Endogenous Viral Proteins. mBio 2017; 8:mBio.00790-17. [PMID: 28588133 PMCID: PMC5461411 DOI: 10.1128/mbio.00790-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Viruses are used as expression vectors for protein synthesis, immunology research, vaccines, and therapeutics. Advantages of poxvirus vectors include the accommodation of large amounts of heterologous DNA, the presence of a cytoplasmic site of transcription, and high expression levels. On the other hand, competition of approximately 200 viral genes with the target gene for expression and immune recognition may be disadvantageous. We describe a vaccinia virus (VACV) vector that uses an early promoter to express the bacteriophage T7 RNA polymerase; has the A23R intermediate transcription factor gene deleted, thereby restricting virus replication to complementing cells; and has a heterologous gene regulated by a T7 promoter. In noncomplementing cells, viral early gene expression and DNA replication occurred normally but synthesis of intermediate and late proteins was prevented. Nevertheless, the progeny viral DNA provided templates for abundant expression of heterologous genes regulated by a T7 promoter. Selective expression of the Escherichia coli lac repressor gene from an intermediate promoter reduced transcription of the heterologous gene specifically in complementing cells, where large amounts might adversely impact VACV replication. Expression of heterologous proteins mediated by the A23R deletion vector equaled that of a replicating VACV, was higher than that of a nonreplicating modified vaccinia virus Ankara (MVA) vector used for candidate vaccines in vitro and in vivo, and was similarly immunogenic in mice. Unlike the MVA vector, the A23R deletion vector still expresses numerous early genes that can restrict immunogenicity as demonstrated here by the failure of the prototype vector to induce interferon alpha. By deleting immunomodulatory genes, we anticipate further improvements in the system. Vaccines provide an efficient and effective way of preventing infectious diseases. Nevertheless, new and better vaccines are needed. Vaccinia virus, which was used successfully as a live vaccine to eradicate smallpox, has been further attenuated and adapted as a recombinant vector for immunization against other pathogens. However, since the initial description of this vector system, only incremental improvements largely related to safety have been implemented. Here we described novel modifications of the platform that increased expression of the heterologous target gene and decreased expression of endogenous vaccinia virus genes while providing safety by preventing replication of the candidate vaccine except in complementing cells used for vector propagation.
Collapse
|
18
|
Earl PL, Americo JL, Moss B. Genetic studies of the susceptibility of classical and wild-derived inbred mouse strains to monkeypox virus. Virology 2015; 481:161-5. [PMID: 25791934 PMCID: PMC4437815 DOI: 10.1016/j.virol.2015.02.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 02/18/2015] [Accepted: 02/21/2015] [Indexed: 11/24/2022]
Abstract
Previously, we screened 38 inbred mouse strains for susceptibility to monkeypox virus (MPXV) and focused on wild-derived CAST mice because of their extreme vulnerability. Here, we provide further analysis of inbred mouse strains. NZW/Lac and C58 mice exhibited more weight loss than other classical inbred strains but all survived intranasal challenges with 10(4) to 10(6)PFU of MPXV. Mice from three wild derived strains, in addition to CAST, exhibited severe weight loss and died or were euthanized. LD50 values for CASA, MOLF and PERA were 100, 6800 and >10(5)PFU, respectively. CASA was inbred independently from the same founders as CAST, whereas MOLF and PERA are genetically and geographically distinct. The MPXV susceptibility of the F1 progeny of CAST and either C57BL/6 or BALB/c indicated that resistance is dominant. Back-crossing the F1 progeny of C57BL/6 and CAST to CAST suggested more than one independent resistant locus.
Collapse
Affiliation(s)
- Patricia L Earl
- Laboratory of Viral Diseases, 33 North Drive, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, Unites States
| | - Jeffrey L Americo
- Laboratory of Viral Diseases, 33 North Drive, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, Unites States
| | - Bernard Moss
- Laboratory of Viral Diseases, 33 North Drive, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, Unites States.
| |
Collapse
|
19
|
Franceschi V, Parker S, Jacca S, Crump RW, Doronin K, Hembrador E, Pompilio D, Tebaldi G, Estep RD, Wong SW, Buller MR, Donofrio G. BoHV-4-Based Vector Single Heterologous Antigen Delivery Protects STAT1(-/-) Mice from Monkeypoxvirus Lethal Challenge. PLoS Negl Trop Dis 2015; 9:e0003850. [PMID: 26086739 PMCID: PMC4473039 DOI: 10.1371/journal.pntd.0003850] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 05/27/2015] [Indexed: 01/13/2023] Open
Abstract
Monkeypox virus (MPXV) is the etiological agent of human (MPX). It is an emerging orthopoxvirus zoonosis in the tropical rain forest of Africa and is endemic in the Congo-basin and sporadic in West Africa; it remains a tropical neglected disease of persons in impoverished rural areas. Interaction of the human population with wildlife increases human infection with MPX virus (MPXV), and infection from human to human is possible. Smallpox vaccination provides good cross-protection against MPX; however, the vaccination campaign ended in Africa in 1980, meaning that a large proportion of the population is currently unprotected against MPXV infection. Disease control hinges on deterring zoonotic exposure to the virus and, barring that, interrupting person-to-person spread. However, there are no FDA-approved therapies against MPX, and current vaccines are limited due to safety concerns. For this reason, new studies on pathogenesis, prophylaxis and therapeutics are still of great interest, not only for the scientific community but also for the governments concerned that MPXV could be used as a bioterror agent. In the present study, a new vaccination strategy approach based on three recombinant bovine herpesvirus 4 (BoHV-4) vectors, each expressing different MPXV glycoproteins, A29L, M1R and B6R were investigated in terms of protection from a lethal MPXV challenge in STAT1 knockout mice. BoHV-4-A-CMV-A29LgD106ΔTK, BoHV-4-A-EF1α-M1RgD106ΔTK and BoHV-4-A-EF1α-B6RgD106ΔTK were successfully constructed by recombineering, and their capacity to express their transgene was demonstrated. A small challenge study was performed, and all three recombinant BoHV-4 appeared safe (no weight-loss or obvious adverse events) following intraperitoneal administration. Further, BoHV-4-A-EF1α-M1RgD106ΔTK alone or in combination with BoHV-4-A-CMV-A29LgD106ΔTK and BoHV-4-A-EF1α-B6RgD106ΔTK, was shown to be able to protect, 100% alone and 80% in combination, STAT1(-/-) mice against mortality and morbidity. This work demonstrated the efficacy of BoHV-4 based vectors and the use of BoHV-4 as a vaccine-vector platform.
Collapse
Affiliation(s)
| | - Scott Parker
- Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Sarah Jacca
- Department of Medical-Veterinary Science, University of Parma, Parma, Italy
| | - Ryan W. Crump
- Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Konstantin Doronin
- Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Edguardo Hembrador
- Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Daniela Pompilio
- Department of Medical-Veterinary Science, University of Parma, Parma, Italy
| | - Giulia Tebaldi
- Department of Medical-Veterinary Science, University of Parma, Parma, Italy
| | - Ryan D. Estep
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, United States of America
| | - Scott W. Wong
- Vaccine and Gene Therapy Institute, Oregon Health and Science University, Beaverton, Oregon, United States of America
| | - Mark R. Buller
- Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, United States of America
| | - Gaetano Donofrio
- Department of Medical-Veterinary Science, University of Parma, Parma, Italy
| |
Collapse
|
20
|
Reynolds SE, Moss B. Characterization of a large, proteolytically processed cowpox virus membrane glycoprotein conserved in most chordopoxviruses. Virology 2015; 483:209-17. [PMID: 25980741 DOI: 10.1016/j.virol.2015.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/01/2015] [Accepted: 04/08/2015] [Indexed: 11/17/2022]
Abstract
Most poxvirus proteins are either highly conserved and essential for basic steps in replication or less conserved and involved in host interactions. Homologs of the CPXV219 protein, encoded by cowpox virus, are present in nearly all chordopoxvirus genera and some species have multiple copies. The CPXV219 homologs have estimated masses of greater than 200 kDa, making them the largest known poxvirus proteins. We showed that CPXV219 was expressed early in infection and cleaved into N- and C-terminal fragments that remained associated. The protein has a signal peptide and transited the secretory pathway where extensive glycosylation and proteolytic cleavage occurred. CPXV219 was located by immunofluorescence microscopy in association with the endoplasmic reticulum, Golgi apparatus and plasma membrane. In non-permeabilized cells, CPXV219 was accessible to external antibody and biotinylation. Mutants that did not express CPXV219 replicated normally in cell culture and retained virulence in a mouse respiratory infection model.
Collapse
Affiliation(s)
- Sara E Reynolds
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Bernard Moss
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
| |
Collapse
|
21
|
Lopera JG, Falendysz EA, Rocke TE, Osorio JE. Attenuation of monkeypox virus by deletion of genomic regions. Virology 2015; 475:129-38. [PMID: 25462353 PMCID: PMC4720520 DOI: 10.1016/j.virol.2014.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/20/2014] [Accepted: 11/03/2014] [Indexed: 01/04/2023]
Abstract
Monkeypox virus (MPXV) is an emerging pathogen from Africa that causes disease similar to smallpox. Two clades with different geographic distributions and virulence have been described. Here, we utilized bioinformatic tools to identify genomic regions in MPXV containing multiple virulence genes and explored their roles in pathogenicity; two selected regions were then deleted singularly or in combination. In vitro and in vivo studies indicated that these regions play a significant role in MPXV replication, tissue spread, and mortality in mice. Interestingly, while deletion of either region led to decreased virulence in mice, one region had no effect on in vitro replication. Deletion of both regions simultaneously also reduced cell culture replication and significantly increased the attenuation in vivo over either single deletion. Attenuated MPXV with genomic deletions present a safe and efficacious tool in the study of MPX pathogenesis and in the identification of genetic factors associated with virulence.
Collapse
Affiliation(s)
- Juan G Lopera
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, USA.
| | | | - Tonie E Rocke
- National Wildlife Health Center, U.S. Geological Survey, Madison, WI, USA
| | - Jorge E Osorio
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, USA.
| |
Collapse
|
22
|
Earl PL, Americo JL, Cotter CA, Moss B. Comparative live bioluminescence imaging of monkeypox virus dissemination in a wild-derived inbred mouse (Mus musculus castaneus) and outbred African dormouse (Graphiurus kelleni). Virology 2015; 475:150-8. [PMID: 25462355 PMCID: PMC4280325 DOI: 10.1016/j.virol.2014.11.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 11/13/2014] [Accepted: 11/14/2014] [Indexed: 11/28/2022]
Abstract
Monkeypox virus belongs to the orthopoxvirus genus, infects rodents and monkeys in Africa, produces a smallpox-like zoonotic disease in humans, and has the potential for global spread and exploitation for bioterrorism. Several small animal models for studying monkeypox virus pathogenesis have been investigated. The African dormouse is a candidate natural host but is outbred and no immunological reagents exist. Although not a natural host, the CAST/EiJ mouse is inbred and animals and reagents are commercially available. We compared the dissemination of monkeypox virus by bioluminescence imaging in CAST/EiJ mice and dormice. In CAST/EiJ mice, intense replication occurred at the intranasal site of inoculation and virus spread rapidly to lungs and abdominal organs, which had a lower virus burden. Compared to CAST/EiJ mice, dormice exhibited a greater variation of virus spread, a slower time course, less replication in the head and chest, and more replication in abdominal organs prior to death.
Collapse
Affiliation(s)
- Patricia L Earl
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, United States
| | - Jeffrey L Americo
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, United States
| | - Catherine A Cotter
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, United States
| | - Bernard Moss
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, United States.
| |
Collapse
|