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Persson G, Restori KH, Emdrup JH, Schussek S, Klausen MS, Nicol MJ, Katkere B, Rønø B, Kirimanjeswara G, Sørensen AB. DNA immunization with in silico predicted T-cell epitopes protects against lethal SARS-CoV-2 infection in K18-hACE2 mice. Front Immunol 2023; 14:1166546. [PMID: 37114047 PMCID: PMC10126292 DOI: 10.3389/fimmu.2023.1166546] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/16/2023] [Indexed: 04/29/2023] Open
Abstract
The global SARS-CoV-2 pandemic caused significant social and economic disruption worldwide, despite highly effective vaccines being developed at an unprecedented speed. Because the first licensed vaccines target only single B-cell antigens, antigenic drift could lead to loss of efficacy against emerging SARS-CoV-2 variants. Improving B-cell vaccines by including multiple T-cell epitopes could solve this problem. Here, we show that in silico predicted MHC class I/II ligands induce robust T-cell responses and protect against severe disease in genetically modified K18-hACE2/BL6 mice susceptible to SARS-CoV-2 infection.
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Affiliation(s)
| | - Katherine H. Restori
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, United States
| | | | | | | | - McKayla J. Nicol
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, United States
| | - Bhuvana Katkere
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, United States
| | | | - Girish Kirimanjeswara
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, United States
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Arora J, Patel DR, Nicol MJ, Field CJ, Restori KH, Wang J, Froelich NE, Katkere B, Terwilliger JA, Weaver V, Luley E, Kelly K, Kirimanjeswara GS, Sutton TC, Cantorna MT. Vitamin D and the Ability to Produce 1,25(OH) 2D Are Critical for Protection from Viral Infection of the Lungs. Nutrients 2022; 14:3061. [PMID: 35893921 PMCID: PMC9332570 DOI: 10.3390/nu14153061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 01/27/2023] Open
Abstract
Vitamin D supplementation is linked to improved outcomes from respiratory virus infection, and the COVID-19 pandemic renewed interest in understanding the potential role of vitamin D in protecting the lung from viral infections. Therefore, we evaluated the role of vitamin D using animal models of pandemic H1N1 influenza and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. In mice, dietary-induced vitamin D deficiency resulted in lung inflammation that was present prior to infection. Vitamin D sufficient (D+) and deficient (D-) wildtype (WT) and D+ and D- Cyp27B1 (Cyp) knockout (KO, cannot produce 1,25(OH)2D) mice were infected with pandemic H1N1. D- WT, D+ Cyp KO, and D- Cyp KO mice all exhibited significantly reduced survival compared to D+ WT mice. Importantly, survival was not the result of reduced viral replication, as influenza M gene expression in the lungs was similar for all animals. Based on these findings, additional experiments were performed using the mouse and hamster models of SARS-CoV-2 infection. In these studies, high dose vitamin D supplementation reduced lung inflammation in mice but not hamsters. A trend to faster weight recovery was observed in 1,25(OH)2D treated mice that survived SARS-CoV-2 infection. There was no effect of vitamin D on SARS-CoV-2 N gene expression in the lung of either mice or hamsters. Therefore, vitamin D deficiency enhanced disease severity, while vitamin D sufficiency/supplementation reduced inflammation following infections with H1N1 influenza and SARS-CoV-2.
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Affiliation(s)
- Juhi Arora
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Devanshi R. Patel
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - McKayla J. Nicol
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Cassandra J. Field
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Katherine H. Restori
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Jinpeng Wang
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Nicole E. Froelich
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Bhuvana Katkere
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Josey A. Terwilliger
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Veronika Weaver
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Erin Luley
- Animal Diagnostic Laboratory, The Pennsylvania State University, University Park, PA 16802, USA; (E.L.); (K.K.)
| | - Kathleen Kelly
- Animal Diagnostic Laboratory, The Pennsylvania State University, University Park, PA 16802, USA; (E.L.); (K.K.)
| | - Girish S. Kirimanjeswara
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Troy C. Sutton
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
| | - Margherita T. Cantorna
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA; (J.A.); (D.R.P.); (M.J.N.); (C.J.F.); (K.H.R.); (J.W.); (N.E.F.); (B.K.); (J.A.T.); (V.W.); (G.S.K.)
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Markley RL, Restori KH, Katkere B, Sumner SE, Nicol MJ, Tyryshkina A, Nettleford SK, Williamson DR, Place DE, Dewan KK, Shay AE, Carlson BA, Girirajan S, Prabhu KS, Kirimanjeswara GS. Macrophage Selenoproteins Restrict Intracellular Replication of Francisella tularensis and Are Essential for Host Immunity. Front Immunol 2021; 12:701341. [PMID: 34777335 PMCID: PMC8586653 DOI: 10.3389/fimmu.2021.701341] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 09/24/2021] [Indexed: 12/13/2022] Open
Abstract
The essential micronutrient Selenium (Se) is co-translationally incorporated as selenocysteine into proteins. Selenoproteins contain one or more selenocysteines and are vital for optimum immunity. Interestingly, many pathogenic bacteria utilize Se for various biological processes suggesting that Se may play a role in bacterial pathogenesis. A previous study had speculated that Francisella tularensis, a facultative intracellular bacterium and the causative agent of tularemia, sequesters Se by upregulating Se-metabolism genes in type II alveolar epithelial cells. Therefore, we investigated the contribution of host vs. pathogen-associated selenoproteins in bacterial disease using F. tularensis as a model organism. We found that F. tularensis was devoid of any Se utilization traits, neither incorporated elemental Se, nor exhibited Se-dependent growth. However, 100% of Se-deficient mice (0.01 ppm Se), which express low levels of selenoproteins, succumbed to F. tularensis-live vaccine strain pulmonary challenge, whereas 50% of mice on Se-supplemented (0.4 ppm Se) and 25% of mice on Se-adequate (0.1 ppm Se) diet succumbed to infection. Median survival time for Se-deficient mice was 8 days post-infection while Se-supplemented and -adequate mice was 11.5 and >14 days post-infection, respectively. Se-deficient macrophages permitted significantly higher intracellular bacterial replication than Se-supplemented macrophages ex vivo, corroborating in vivo observations. Since Francisella replicates in alveolar macrophages during the acute phase of pneumonic infection, we hypothesized that macrophage-specific host selenoproteins may restrict replication and systemic spread of bacteria. F. tularensis infection led to an increased expression of several macrophage selenoproteins, suggesting their key role in limiting bacterial replication. Upon challenge with F. tularensis, mice lacking selenoproteins in macrophages (TrspM) displayed lower survival and increased bacterial burden in the lung and systemic tissues in comparison to WT littermate controls. Furthermore, macrophages from TrspM mice were unable to restrict bacterial replication ex vivo in comparison to macrophages from littermate controls. We herein describe a novel function of host macrophage-specific selenoproteins in restriction of intracellular bacterial replication. These data suggest that host selenoproteins may be considered as novel targets for modulating immune response to control a bacterial infection.
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Affiliation(s)
- Rachel L. Markley
- Pathobiology Graduate Program, The Pennsylvania State University, University Park, PA, United States,Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Katherine H. Restori
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Bhuvana Katkere
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Sarah E. Sumner
- Pathobiology Graduate Program, The Pennsylvania State University, University Park, PA, United States,Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - McKayla J. Nicol
- Pathobiology Graduate Program, The Pennsylvania State University, University Park, PA, United States,Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Anastasia Tyryshkina
- Neuroscience Graduate Program, Huck Institute of the Life Sciences, The Pennsylvania State University, University Park, PA, United States,Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, United States
| | - Shaneice K. Nettleford
- Pathobiology Graduate Program, The Pennsylvania State University, University Park, PA, United States,Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - David R. Williamson
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States
| | - David E. Place
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN, United States
| | - Kalyan K. Dewan
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Department of Infectious Diseases, The University of Georgia, Athens, GA, United States
| | - Ashley E. Shay
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, United States
| | - Bradley A. Carlson
- Office of Research Support, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Santhosh Girirajan
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, United States
| | - K. Sandeep Prabhu
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, University Park, PA, United States
| | - Girish S. Kirimanjeswara
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States,Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, University Park, PA, United States,*Correspondence: Girish S. Kirimanjeswara,
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Yang J, Restori KH, Xu M, Song EH, Zhao L, Hu S, Lyu P, Wang WB, Xiong N. Preferential Perinatal Development of Skin-Homing NK1.1 + Innate Lymphoid Cells for Regulation of Cutaneous Microbiota Colonization. iScience 2020; 23:101014. [PMID: 32283522 PMCID: PMC7155142 DOI: 10.1016/j.isci.2020.101014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 03/10/2020] [Accepted: 03/24/2020] [Indexed: 12/30/2022] Open
Abstract
Proper immune cell development at early ontogenic stages is critical for life-long health. How resident immune cells are established in barrier tissues at neonatal stages to provide early protection is an important but still poorly understood question. We herein report that a developmentally programmed preferential generation of skin-homing group 1 innate lymphoid cells (ILC1s) at perinatal stages helps regulate early skin microbiota colonization. We found that a population of skin-homing NK1.1+ ILC1s was preferentially generated in the perinatal thymi of mice. Unique thymic environments and progenitor cells are responsible for the preferential generation of skin-homing NK1.1+ ILC1s at perinatal stages. In the skin, NK1.1+ ILC1s regulate proper microbiota colonization and control the opportunistic pathogen Pseudomonas aeruginosa in neonatal mice. These findings provide insight into the development and function of tissue-specific immune cells at neonatal stages, a critical temporal window for establishment of local tissue immune homeostasis.
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Affiliation(s)
- Jie Yang
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA
| | - Katherine H Restori
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA
| | - Ming Xu
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
| | - Eun Hyeon Song
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
| | - Luming Zhao
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA
| | - Shaomin Hu
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA
| | - Pingyun Lyu
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA
| | - Wei-Bei Wang
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
| | - Na Xiong
- Department of Veterinary and Biomedical Sciences, Centre for Molecular Immunology and Infectious Disease, The Pennsylvania State University, 115 Henning Building, University Park, PA 16802, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA; Department of Medicine-Division of Dermatology and Cutaneous Surgery, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA.
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Restori KH, Srinivasa BT, Ward BJ, Fixman ED. Neonatal Immunity, Respiratory Virus Infections, and the Development of Asthma. Front Immunol 2018; 9:1249. [PMID: 29915592 PMCID: PMC5994399 DOI: 10.3389/fimmu.2018.01249] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 05/18/2018] [Indexed: 12/27/2022] Open
Abstract
Infants are exposed to a wide range of potential pathogens in the first months of life. Although maternal antibodies acquired transplacentally protect full-term neonates from many systemic pathogens, infections at mucosal surfaces still occur with great frequency, causing significant morbidity and mortality. At least part of this elevated risk is attributable to the neonatal immune system that tends to favor T regulatory and Th2 type responses when microbes are first encountered. Early-life infection with respiratory viruses is of particular interest because such exposures can disrupt normal lung development and increase the risk of chronic respiratory conditions, such as asthma. The immunologic mechanisms that underlie neonatal host-virus interactions that contribute to the subsequent development of asthma have not yet been fully defined. The goals of this review are (1) to outline the differences between the neonatal and adult immune systems and (2) to present murine and human data that support the hypothesis that early-life interactions between the immune system and respiratory viruses can create a lung environment conducive to the development of asthma.
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Affiliation(s)
- Katherine H Restori
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Bharat T Srinivasa
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Brian J Ward
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Elizabeth D Fixman
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada.,Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montréal, QC, Canada
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Srinivasa BT, Restori KH, Shan J, Cyr L, Xing L, Lee S, Ward BJ, Fixman ED. STAT6 inhibitory peptide given during RSV infection of neonatal mice reduces exacerbated airway responses upon adult reinfection. J Leukoc Biol 2016; 101:519-529. [PMID: 27566834 DOI: 10.1189/jlb.4a0215-062rr] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 06/09/2016] [Accepted: 08/02/2016] [Indexed: 11/24/2022] Open
Abstract
Respiratory syncytial virus (RSV)-related hospitalization during infancy is strongly associated with the subsequent development of asthma. Early life RSV infection results in a Th2-biased immune response, which is also typical of asthma. Murine models of neonatal RSV infection have been developed to examine the possible contribution of RSV-driven Th2 responses to the development of airway hyper-responsiveness later in childhood. We have investigated the ability of a cell-penetrating STAT6 inhibitory peptide (STAT6-IP), when delivered selectively during neonatal RSV infection, to modify pathogenesis induced upon secondary RSV reinfection of adults 6 wk later. Neonatal STAT6-IP treatment inhibited the development of airway hyper-responsiveness (AHR) and significantly reduced lung eosinophilia and collagen deposition in adult mice following RSV reinfection. STAT6-IP-treated, RSV-infected neonates had reduced levels of both IL-4 and alternatively activated macrophages (AAMs) in the lungs. Our findings suggest that targeting STAT6 activity at the time of early-life RSV infection may effectively reduce the risk of subsequent asthma development.
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Affiliation(s)
- Bharat T Srinivasa
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; and
| | - Katherine H Restori
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; and
| | - Jichuan Shan
- Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Louis Cyr
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; and
| | - Li Xing
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; and
| | - Soojin Lee
- Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Brian J Ward
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; and
| | - Elizabeth D Fixman
- Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
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Restori KH, McDaniel KL, Wray AE, Cantorna MT, Ross AC. Streptococcus pneumoniae-induced pneumonia and Citrobacter rodentium-induced gut infection differentially alter vitamin A concentrations in the lung and liver of mice. J Nutr 2014; 144:392-8. [PMID: 24431327 PMCID: PMC3927551 DOI: 10.3945/jn.113.186569] [Citation(s) in RCA: 8] [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] [Indexed: 01/31/2023] Open
Abstract
In the developing world, vitamin A (VA) deficiency is endemic in populations that are also at great risk of morbidity and mortality because of pneumococcal pneumonia and enteric infections. To better understand how lung and gastrointestinal pathogens affect VA status, we assessed VA concentrations in serum, lung, and liver during an invasive pneumonia infection induced by Streptococcus pneumoniae serotype 3, and a noninvasive gut infection induced by Citrobacter rodentium, in vitamin A-adequate (VAA) and vitamin A-deficient (VAD) mice. For pneumonia infection, mice were immunized with pneumococcal polysaccharide serotype 3 (PPS3), or not (infected-control), 5 d prior to intranasal inoculation with S. pneumoniae. Two days post-inoculation, immunization was protective against systemic infection regardless of VA status as PPS3 immunization decreased bacteremia compared with infected-control mice (P < 0.05). Retinol concentrations in the lung were higher in infected-control VAA mice (15.7 nmol/g: P < 0.05) compared with PPS3-immunized mice (8.23 nmol/g), but this was not associated with increased lung bacterial burden. VAA mice had reduced severity of C. rodentium-induced gut infection as measured by fecal bacterial shedding compared with VAD mice (P < 0.05). Liver retinol and retinyl ester concentrations in VAA mice decreased at the peak of infection (retinol, 8.1 nmol/g; retinyl esters, 985 nmol/g; P < 0.05, compared with uninfected mice; retinol, 29.5 nmol/g; retinyl esters, 1730 nmol/g), whereas tissue VA concentrations were low in VAD mice during both infections. Colonic mucin gene expression was also depressed at peak infection compared with uninfected mice (P < 0.05). Overall, pneumonia had less effect on VA status than gastrointestinal infection, predominantly owing to reduced hepatic VA storage at the peak of gut infection.
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Affiliation(s)
| | | | | | - Margherita T. Cantorna
- Center for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Science, Pennsylvania State University, University Park, PA
| | - A. Catharine Ross
- Department of Nutritional Sciences,Center for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Science, Pennsylvania State University, University Park, PA,To whom correspondence should be addressed. E-mail:
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Soye KJ, Trottier C, Di Lenardo TZ, Restori KH, Reichman L, Miller WH, Ward BJ. In vitro inhibition of mumps virus by retinoids. Virol J 2013; 10:337. [PMID: 24225020 PMCID: PMC3829803 DOI: 10.1186/1743-422x-10-337] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [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: 01/04/2013] [Accepted: 10/30/2013] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Mumps virus (MuV) is a highly infectious paramyxovirus closely related to measles virus (MeV). Despite the availability of a mumps vaccine, outbreaks continue to occur and no treatment options are available. Vitamin A and other naturally occurring retinoids inhibit the replication of MeV in vitro. METHODS Anti-viral effects of retinoids were observed in cell culture using the myelomonocytic U937, NB4/R4, and Huh7/7.5 cells. Observations of anti-viral effect were quantified using TCID50 analysis. Molecular properties of the antiviral effect were analysed using quantitative RT-PCR and western blot. RESULTS The current work demonstrates that retinoids inhibit MuV in vitro due to up-regulation of type I interferon (IFN) and IFN stimulated genes. This effect is mediated by nuclear retinoid receptor signalling and RIG-I is required. The antiviral retinoid-induced state makes cells less permissive to viral replication from subsequent challenge with either MuV or MeV for less than 12 hours. CONCLUSIONS These results demonstrate that retinoids inhibit MuV replication in uninfected bystander cells through a retinoid inducible gene I (RIG-I), retinoic acid receptor (RAR) and IFN dependent manner making them refractory to subsequent rounds of viral replication. These observations raise the possibility that pharmacological doses of retinoids might have clinical benefit in MuV infection.
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Affiliation(s)
- Kaitlin J Soye
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
- Segal Cancer Centre, Lady Davis Institute for Medical Research, SMBD Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Claire Trottier
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
- Segal Cancer Centre, Lady Davis Institute for Medical Research, SMBD Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Thomas Z Di Lenardo
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
- Segal Cancer Centre, Lady Davis Institute for Medical Research, SMBD Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Katherine H Restori
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
- Segal Cancer Centre, Lady Davis Institute for Medical Research, SMBD Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Lee Reichman
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
| | - Wilson H Miller
- Segal Cancer Centre, Lady Davis Institute for Medical Research, SMBD Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Brian J Ward
- Research Institute of the McGill University Health Center, Department of Infectious Diseases, McGill University, Montreal, Quebec, Canada
- Montreal General Hospital, 1650 Cedar Ave., Room L10-309, Montreal, Quebec H3G 1A4, Canada
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Restori KH, Kennett MJ, Ross AC. Immunization with pneumococcal polysaccharide serotype 3 and lipopolysaccharide modulates lung and liver inflammation during a virulent Streptococcus pneumoniae infection in mice. Clin Vaccine Immunol 2013; 20:639-50. [PMID: 23389932 PMCID: PMC3647752 DOI: 10.1128/cvi.00593-12] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 01/25/2013] [Indexed: 11/20/2022]
Abstract
Vaccination reduces morbidity and mortality from pneumonia, but its effect on the tissue-level response to infection is still poorly understood. We evaluated pneumonia disease progression, acute-phase response, and lung gene expression profiles in mice inoculated intranasally with virulent Gram-positive Streptococcus pneumoniae serotype 3 (ST 3) with and without prior immunization with pneumococcal polysaccharide ST 3 (PPS3) or after coimmunization with PPS3 and a low dose of lipopolysaccharide (PPS3+LPS). Pneumonia severity was assessed in the acute phase at 5, 12, 24 and 48 h postinoculation (p.i.) and in the resolution phase at 7 days p.i. Primary PPS3-specific antibody production was upregulated, and IgM binding to pneumococci increased in PPS3-immunized mice. Immunizations with PPS3 or PPS3+LPS decreased bacterial recovery in the lung and blood at 24 and 48 h and increased survival. Microarray analysis of whole-lung RNA revealed significant changes in the acute-phase protein serum amyloid A (SAA) levels between noninfected and infected mice, and these changes were attenuated by immunization. SAA transcripts were higher in the liver and lungs of infected controls, and SAA protein was elevated in serum but decreased in PPS3-immunized mice. Thus, during a virulent pneumonia infection, prior immunization with PPS3 in an IgM-dependent manner as well as immunization with PPS3+LPS attenuated pneumonia severity and promoted resolution of infection, concomitant with significant regulation of cytokine gene expression levels in the lungs and acute-phase proteins in the lungs, liver, and serum.
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Affiliation(s)
- Katherine H. Restori
- Graduate Program in Immunology and Infectious Disease, The Huck Institute of Life Sciences
| | | | - A. Catharine Ross
- Department of Nutritional Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
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