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Karampatsas K, Hall T, Voysey M, Carreras-Abad C, Cochet M, Ramkhelawon L, Peregrine E, Andrews N, Heath PT, Le Doare K. Antibody kinetics between birth and three months of life in healthy infants with natural exposure to Group B streptococcus: A UK cohort study. Vaccine 2024; 42:3230-3238. [PMID: 38627147 DOI: 10.1016/j.vaccine.2024.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 03/11/2024] [Accepted: 04/04/2024] [Indexed: 04/29/2024]
Abstract
INTRODUCTION Capsular polysaccharide (CPS) serotype-specific Immunoglobulin G (IgG) in cord blood has been proposed as a correlate of protection against invasive Group B Streptococcus (iGBS) disease. Although protective levels are required in infants throughout the window of vulnerability up to 3 months of age, little is known regarding the kinetics of GBS-specific IgG over this period. METHODS We enrolled 33 healthy infants born to mothers colonized with GBS. We collected cord blood and infant blood samples either at one (21-35 days), two (49-63 days), or three months of age (77-91 days). We measured GBS serotype-specific CPS IgG concentrations and calculated the decay rate using a mixed-effects model. We further explored whether the antibody kinetics were affected by common maternal and infant factors and estimated the correlation between IgG concentration at birth and one, two, and three months of age. RESULTS The half-life estimate of IgG concentration for homologous and non-homologous GBS serotypes in paired samples with detectable IgG levels at both time points was 27.4 (95 % CI: 23.5-32.9) days. The decay rate did not vary by maternal age (p = 0.7), ethnicity (p = 0.1), gravida (p = 0.1), gestation (p = 0.7), and infant sex (p = 0.1). Predicted IgG titres above the assay lower limit of quantification on day 30 strongly correlated with titres at birth (Spearman correlation coefficient 0.71 [95 % CI: 0.60-0.80]). CONCLUSION Our results provide a basis for future investigations into the use of antibody kinetics in defining a serocorrelate of protection against late-onset iGBS disease.
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Affiliation(s)
- Konstantinos Karampatsas
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom.
| | - Tom Hall
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom
| | - Merryn Voysey
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Clara Carreras-Abad
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom
| | - Madeleine Cochet
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom
| | - Laxmee Ramkhelawon
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom
| | - Elisabeth Peregrine
- Department of Obstetrics and Gynaecology, Kingston Hospital NHS Foundation Trust, London, United Kingdom
| | - Nick Andrews
- UK Health Security Agency, London, United Kingdom
| | - Paul T Heath
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom
| | - Kirsty Le Doare
- Centre for Neonatal and Paediatric Infection, St. George's, University of London, London, United Kingdom; Pathogen Immunology Group, UK Health Security Agency, Porton Down, United Kingdom; Makerere University Johns Hopkins University, Kampala, Uganda
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Harris E. Cost-effective Global Strep B Vaccination Would Prevent Infant Deaths. JAMA 2023; 329:1143. [PMID: 36947071 DOI: 10.1001/jama.2023.4005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
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Pinho-Ribeiro FA, Deng L, Neel DV, Erdogan O, Basu H, Yang D, Choi S, Walker AJ, Carneiro-Nascimento S, He K, Wu G, Stevens B, Doran KS, Levy D, Chiu IM. Bacteria hijack a meningeal neuroimmune axis to facilitate brain invasion. Nature 2023; 615:472-481. [PMID: 36859544 PMCID: PMC10593113 DOI: 10.1038/s41586-023-05753-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 01/23/2023] [Indexed: 03/03/2023]
Abstract
The meninges are densely innervated by nociceptive sensory neurons that mediate pain and headache1,2. Bacterial meningitis causes life-threatening infections of the meninges and central nervous system, affecting more than 2.5 million people a year3-5. How pain and neuroimmune interactions impact meningeal antibacterial host defences are unclear. Here we show that Nav1.8+ nociceptors signal to immune cells in the meninges through the neuropeptide calcitonin gene-related peptide (CGRP) during infection. This neuroimmune axis inhibits host defences and exacerbates bacterial meningitis. Nociceptor neuron ablation reduced meningeal and brain invasion by two bacterial pathogens: Streptococcus pneumoniae and Streptococcus agalactiae. S. pneumoniae activated nociceptors through its pore-forming toxin pneumolysin to release CGRP from nerve terminals. CGRP acted through receptor activity modifying protein 1 (RAMP1) on meningeal macrophages to polarize their transcriptional responses, suppressing macrophage chemokine expression, neutrophil recruitment and dural antimicrobial defences. Macrophage-specific RAMP1 deficiency or pharmacological blockade of RAMP1 enhanced immune responses and bacterial clearance in the meninges and brain. Therefore, bacteria hijack CGRP-RAMP1 signalling in meningeal macrophages to facilitate brain invasion. Targeting this neuroimmune axis in the meninges can enhance host defences and potentially produce treatments for bacterial meningitis.
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Affiliation(s)
- Felipe A Pinho-Ribeiro
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
- Division of Dermatology, John T. Milliken Department of Medicine, Washington University School of Medicine in St Louis, St Louis, MO, USA
| | - Liwen Deng
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Dylan V Neel
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Ozge Erdogan
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, MA, USA
| | - Himanish Basu
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Daping Yang
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Samantha Choi
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Alec J Walker
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Simone Carneiro-Nascimento
- Departments of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Kathleen He
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Glendon Wu
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Beth Stevens
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA, USA
| | - Kelly S Doran
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Dan Levy
- Harvard Medical School, Boston, MA, USA
- Departments of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Isaac M Chiu
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
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Sun Z, Huang W, Zheng Y, Liu P, Yang W, Guo Z, Kong D, Lv Q, Zhou X, Du Z, Jiang H, Jiang Y. Fpr2/CXCL1/2 Controls Rapid Neutrophil Infiltration to Inhibit Streptococcus agalactiae Infection. Front Immunol 2021; 12:786602. [PMID: 34899755 PMCID: PMC8652123 DOI: 10.3389/fimmu.2021.786602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/05/2021] [Indexed: 11/24/2022] Open
Abstract
Streptococcus agalactiae, also known as group B streptococcus (GBS), can cause pneumonia, meningitis, and bacteremia, making it a pathogen that can increase the risk of death in newborns and immunodeficient individuals. Neutrophils are the first barrier to a host's innate immune defense against these infections. Fpr2(Formyl peptide receptor 2) is an important chemotactic receptor of neutrophils, though its activation would cause pro- and anti-inflammatory effects. In this study, we found that mice without Fpr2 receptor were highly susceptible to GBS infections. These mice demonstrated decreased chemotaxis to neutrophils, decreased bactericidal ability of neutrophils, and high mortality. RNA-seq and Luminex assay indicated that Fpr2 activates key signal molecules downstream and produces chemokines CXCL1/2 to chemotaxis neutrophils. Like Fpr2-/-, CXCL1/2 or neutrophil depletion impairs host's ability to defend against GBS infection. Altogether, these data indicate that Fpr2 contributes to a host's ability to control GBS infection and that a lack of Fpr2 was associated with selective impairment during the production of chemokines CXCL1 and CXCL2 as well as neutrophil recruitment. Here, We clarified that Fpr2, as a chemotactic receptor, could not only directly chemotactic neutrophils, but also regulate the production of chemokines to control infection by chemotactic neutrophils.
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Affiliation(s)
- Zeyu Sun
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Wenhua Huang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Wenbo Yang
- Changchun University of Chinese Medicine, Changchun, China
| | - Zinan Guo
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Xinyu Zhou
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Zongmin Du
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
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Baeringsdottir B, Erlendsdottir H, Bjornsdottir ES, Martins ER, Ramirez M, Haraldsson A, Thorkelsson T. Group B streptococcal infections in infants in Iceland: clinical and microbiological factors. J Med Microbiol 2021; 70:001426. [PMID: 34554080 PMCID: PMC8697508 DOI: 10.1099/jmm.0.001426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/19/2021] [Indexed: 02/04/2023] Open
Abstract
Introduction. Group B streptococcus (GBS) is a leading cause of invasive neonatal infections. These have been divided into early-onset disease (EOD; <7 days) and late-onset disease (LOD; 7-89 days), with different GBS clonal complexes (CCs) associated with different disease presentations.Hypothesis. Different GBS CCs are associated with timing of infection (EOD or LOD) and clinical presentation (sepsis, meningitis or pneumonia).Aim. To study infant GBS infections in Iceland from 1975 to 2019. Are specific GBS CCs related to disease presentation? Is CC17 overrepresented in infant GBS infections in Iceland?Methodology. All culture-confirmed invasive GBS infections in infants (<90 days) in Iceland from 1975 to 2019 were included. Clinical information was gathered from medical records.Results. A total of 127 invasive GBS infections in infants were diagnosed, but 105 infants were included in the study. Of these, 56 had EOD and 49 had LOD. The incidence of GBS infections declined from 2000 onwards but increased again at the end of the study period. Furthermore, there was a significant increase in LOD over the study period (P=0.0001). The most common presenting symptoms were respiratory difficulties and fever and the most common presentation was sepsis alone. Approximately one-third of the cases were caused by GBS CC17 of serotype III with surface protein RIB and pili PI-1+PI-2b or PI-2b. CC17 was significantly associated with LOD (P<0.001).Conclusion. CC17 is a major cause of GBS infection in infants in Iceland. This clone is associated with LOD, which has been increasing in incidence. Because intrapartum antibiotic prophylaxis only prevents EOD, it is important to continue the development of a GBS vaccine in order to prevent LOD infections.
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Affiliation(s)
| | - Helga Erlendsdottir
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Clinical Microbiology, Landspitali University Hospital, Reykjavik, Iceland
| | | | - Elisabete R. Martins
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Mário Ramirez
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Asgeir Haraldsson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- The Children’s Hospital, Landspitali University Hospital, Reykjavik, Iceland
| | - Thordur Thorkelsson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- The Children’s Hospital, Landspitali University Hospital, Reykjavik, Iceland
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Xie C, Wang Z, Li Y, Wu F, Lu Y, Xia H, Tang J, Jian J, Kwok KW. Conservation of structural and interactional features of CD226 and Necl5 molecules from Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2021; 116:74-83. [PMID: 34033910 DOI: 10.1016/j.fsi.2021.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
CD226 interacts with its ligand Necl5 as a costimulatory signal. In this study, we cloned a CD226 from Nile tilapia (Oreochromis niloticus, named OnCD226) and a Necl5 (named OnNecl5). The open reading frame of OnCD226 was 1071 bp, encoding a protein of 356 amino acids. Sequence alignment analysis indicated that OnCD226 contained two Ig-like domains in ectodomain. The open reading frame of OnNecl5 was 1155 bp, encoding a protein of 384 amino acids, and there are three lg-like domains in the extracellular domain. In healthy tilapia, OnCD226 was distributed in all tested tissues and relatively higher in the brain, while OnNecl5 was relatively higher in the skin. After Streptococcus agalactiae infection, OnCD226 has the same up-regulated expression pattern as OnNecl5 in different tissues. After HKLs stimulation with S. agalactiae and Poly I:C, respectively. OnCD226 was significantly up-regulated (0.01 < p < 0.05) at 12 h and extremely significant up-regulation was observed (p < 0.01) at 48 h and 96 h, the peak was observed at 96 h after stimulation by S. agalactiae. After stimulation by Poly I:C, OnCD226 expression was extremely significant (p < 0.01) at 72 h and 96 h, the peak was observed at 96 h. After stimulation by Keyhole limpet hemocyanin (KLH), a classical T cell-dependent antigen, the expression of OnCD226 was significantly up-regulated in blood, head kidney, spleen, and thymus. Moreover, when compared with the first challenge, the gene expression of OnCD226 which response to the second challenge was up-regulated earlier. Subcellular co-localization studies showed that OnCD226 and OnNecl5 were distributed mainly in the cytomembrane. Yeast two-hybrid results, indicated a strong interaction between OnCD226 and OnNecl5. These results suggested that OnCD226 plays an important role during pathogens infection, and the interaction between CD226 and Necl5 is conserved in Nile tilapia.
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Affiliation(s)
- Caixia Xie
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China
| | - Zhiwen Wang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China
| | - Yuan Li
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China
| | - Fan Wu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China
| | - Yishan Lu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China.
| | - Hongli Xia
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 51820, China
| | - Jufen Tang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China
| | - Jichang Jian
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China
| | - Kevin Wh Kwok
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong
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Ching JJ, Shuib AS, Abdullah N, Majid NA, Taufek NM, Sutra J, Amal Azmai MN. Hot water extract of Pleurotus pulmonarius stalk waste enhances innate immune response and immune-related gene expression in red hybrid tilapia Oreochromis sp. following challenge with pathogen-associated molecular patterns. Fish Shellfish Immunol 2021; 116:61-73. [PMID: 34157396 DOI: 10.1016/j.fsi.2021.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/01/2021] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
In aquaculture, commercial fish such as red hybrid tilapia are usually raised at high density to boost the production within a short period of time. This overcrowded environment, however, may cause stress to the cultured fish and increase susceptibility to infectious diseases. Antibiotics and chemotherapeutics are used by fish farmers to overcome these challenges, but this may increase the production cost. Studies have reported on the potential of mushroom polysaccharides that can act as immunostimulants to enhance the immune response and disease resistance in fish. In the current study, hot water extract (HWE) from mushroom stalk waste (MSW) was used to formulate fish feed and hence administered to red hybrid tilapia to observe the activation of immune system. Upon 30 days of feeding, the fish were challenged with pathogen-associated molecular patterns (PAMPs) such as lipopolysaccharides (LPS) and polyinosinic:polycytidylic acid (poly (I:C)) to mimic bacterial and viral infection, respectively. HWE supplementation promoted better feed utilisation in red hybrid tilapia although it did not increase the body weight gain and specific growth rate compared to the control diet. The innate immunological parameters such as phagocytic activity and respiratory burst activity were significantly higher in HWE-supplemented group than that of the control group following PAMPs challenges. HWE-supplemented diet also resulted in higher mRNA transcription of il1b and tnfa in midgut, spleen and head kidney at 1-day post PAMPs injection. Tlr3 exhibited the highest upregulation in the HWE fed fish injected with poly (I:C). At 3-days post PAMPs injection, both ighm and tcrb expression were upregulated significantly in the spleen and head kidney. Results showed that HWE supplementation enhances the immune responses of red hybrid tilapia and induced a higher serum bactericidal activity against S. agalactiae.
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Affiliation(s)
- Joo Jie Ching
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Adawiyah Suriza Shuib
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Noorlidah Abdullah
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Nazia Abdul Majid
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Norhidayah Mohd Taufek
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; AquaNutri Biotech Research Laboratory, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Jumria Sutra
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Mohammad Noor Amal Azmai
- Aquatic Animal Health and Therapeutics Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia; Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
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Wangkaghart E, Deville S, Wang B, Srisapoome P, Wang T, Secombes CJ. Immune response and protective efficacy of two new adjuvants, Montanide™ ISA 763B VG and Montanide™ GEL02, administered with a Streptococcus agalactiae ghost vaccine in Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2021; 116:19-29. [PMID: 34153428 DOI: 10.1016/j.fsi.2021.06.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/03/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
Streptococcus agalactiae is one of the most important pathogens infecting tilapia worldwide and causes meningoencephalitis, septicemia and high mortalities with considerable losses. Various types of vaccines have been developed against S. agalactiae infection, such as inactivated vaccines, live attenuated vaccines and subunit vaccines. Bacterial ghosts (BGs) are nonliving, empty cell envelopes and have been reported as novel vaccine candidates. Therefore, the main aims of this study were to develop an S. agalactiae ghost vaccine (SAGV) and to evaluate the immune response and protective effect of SAGV against S. agalactiae with two novel adjuvants, Montanide™ ISA 763B VG and Montanide™ GEL02. Nile tilapia, mean weight 50 g, were divided into four groups as follows; 1) fish injected with PBS as control, 2) fish injected with the SAGV alone; 3) fish injected with the SAGV+Montanide™ ISA 763B VG; and 4) fish injected with SAGV+Montanide™ GEL02. Following vaccination, innate immunity parameters including serum lysozyme, myeloperoxidase, catalase, and bactericidal activity were all significantly enhanced. Moreover, specific serum IgM antibodies were induced and reached their highest level 2-8 weeks post vaccination. Importantly, the relative percent survival of tilapia vaccinated against the SAGV formulated with both adjuvants was 80-93%. Furthermore, the transcription of immune-related genes (IgM, TCRβ, IL-1β, IL-8 and TNFα) were up-regulated in tilapia after vaccination, indicating that both cellular and humoral immune responses were induced by these adjuvanted vaccines. In summary, Montanide™ ISA 763B VG and Montanide™ GEL02 can enhance immunoprotection induced by the SAGV vaccine against streptococcosis, demonstrating that both have value as potential adjuvants of fish vaccines.
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Affiliation(s)
- Eakapol Wangkaghart
- Research Unit of Excellence for Tropical Fisheries and Technology, Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, Thailand.
| | - Sebastien Deville
- SEPPIC, Paris La Défense, 50 Boulevard National, CS 90020, 92257, La Garenne Colombes Cedex, France.
| | - Bei Wang
- Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animal, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, PR China.
| | - Prapansak Srisapoome
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Jatujak, Bangkok, 10900, Thailand.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.
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Marcusso PF, da Silva Claudiano G, Yunis-Aguinaga J, de Almeida Marinho-Neto F, Eto SF, Fernandes DC, Rosolem MC, Salvador R, Engracia de Moraes JR, Ruas de Moraes F. Immunogenicity in Oreochromis niloticus vaccinated with sonicated antigens against streptococcosis. Fish Shellfish Immunol 2021; 115:134-141. [PMID: 34098067 DOI: 10.1016/j.fsi.2021.04.030] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Streptococcosis causes great economic losses in intensive culture of tilapia. Vaccination is the most effective and safest way to tackle infectious diseases. Thus, this study sought the more effective and safer antigenic fraction after sonication of Streptococcus agalactiae to elaborate a vaccine against streptococcosis in Nile tilapia. For this, twenty-one days after vaccination with different fractions (soluble and insoluble) of S. agalactiae, the fish were challenged with the homologous strain (LD50). Then, samples were taken at zero, 14, 28, 60 and 90 days post-vaccination (DPV, n = 7). Blood and organs (cranial kidney, spleen and liver) were collected from vaccinated and unvaccinated fish. Finally, insoluble fraction vaccine presented the best effect, resulting in a 100% relative percent of survival (RPS) and without clinical manifestations. In view of the results, it was to evaluate the role of the insoluble fraction of the antigen in the protective immunity against streptococcosis. The results indicate that the spleen might be the main organ in the vaccine response in Nile tilapia due to the great morphological and immunological differences in vaccinated fish, evidenced by the greater of melanomacrophage centers (MMC) and IgM + lymphocytes in relation to the non-vaccinated fish. At 60 DPV, it was observed the peak of the protective immunity related to the maximum concentration of proteins, circulating leukocytes, antibody titers in the serum and tissue changes with greater expression of IgM + and MMC number in the spleen and kidney of Oreochromis niloticus. Vaccination with insoluble fraction of S. agalactiae was safe and provided effective protection against streptococcosis with maximum protective response at 60 DPV.
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Affiliation(s)
- Paulo Fernandes Marcusso
- Institute of Agricultural Sciences, Federal University of the Jequitinhonha and Mucuri Valleys, Israel; Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil.
| | - Gustavo da Silva Claudiano
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil; Institute of Biodiversity and Forests, Federal University of Western Pará, UFOPA, Pará, Brazil; Postgraduated Program in Aquaculture/Aquaculture Center São Paulo State University (UNESP) Jaboticabal, São Paulo, Brazil.
| | - Jefferson Yunis-Aguinaga
- Scientific University of the South, Lima, Peru; Sea Institute of Peru, Callao, Peru; Postgraduated Program in Aquaculture/Aquaculture Center São Paulo State University (UNESP) Jaboticabal, São Paulo, Brazil.
| | - Fausto de Almeida Marinho-Neto
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil.
| | - Silas Fernandes Eto
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil; Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista, Brazil.
| | - Dayanne Carla Fernandes
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil; Institute of Chemistry, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil.
| | - Mayara Caroline Rosolem
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil; Veterinary Pathologist Autonomous,.Brazil.
| | | | - Julieta Rodini Engracia de Moraes
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil; Postgraduated Program in Aquaculture/Aquaculture Center São Paulo State University (UNESP) Jaboticabal, São Paulo, Brazil.
| | - Flávio Ruas de Moraes
- Department of Pathology, Theriogenology and One Health, Faculty of Agrarian and Veterinarian Sciences, São Paulo State University (UNESP), Unesp, Brazil.
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10
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Huang Y, Han X, Peng H, Li A, Li R. Expression profile of the fish immune enzyme l-amino acid oxidase (LAAO) after Streptococcus agalactiae infection in zebrafish (Danio rerio). Dev Comp Immunol 2021; 119:104040. [PMID: 33561521 DOI: 10.1016/j.dci.2021.104040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/02/2021] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
l-amino acid oxidase (LAAO) is a recently discovered novel fish immune enzyme. To explore the role of LAAO in the immune system of bony fishes, we cloned the full-length coding sequence (CDS) of LAAO of the zebrafish Danio rerio (ZF-LAAO), conducted bioinformatics analysis of ZF-LAAO, and analyzed its expression profile in zebrafish infected with the pathogen Streptococcus agalactiae. The CDS of ZF-LAAO was 1,515 base pairs long, and the encoded protein of ZF-LAAO contained an 18 amino acid signal peptide. ZF-LAAO contained the conserved domains of the LAAO family (dinucleotide binding motif and GG-motif), 2 N-glycosylation sites, and 2 O-glycosylation sites, and it was a stable hydrophilic exocrine protein. Similarity of the amino acid sequence of ZF-LAAO with LAAOs of 14 other bony fish species was >50% in all cases. The greatest similarity (79.45%) was with the LAAO of Anabarilius grahami, and these two LAAOs were grouped together in the phylogenetic tree. In wild-type zebrafish infected with S. agalactiae, changes in ZF-LAAO gene (zflaao) expression occurred mainly in the early stage of infection, and the changes in zflaao expression were more pronounced than those of the immune enzyme lysozyme (LYZ). The expression levels of both LYZ gene of zebrafish (zflyz) and zflaao were significantly elevated at 6 h after infection (p < 0.001), but zflyz expression in the spleen decreased at 12 h whereas zflaao expression in the liver and spleen peaked at 12 h. These results provided a reference for functional studies of the novel immune enzyme LAAO in bony fish.
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Affiliation(s)
- Yuxi Huang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Key Laboratory of Marine Animal Disease Control and Prevention, College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xiao Han
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Key Laboratory of Marine Animal Disease Control and Prevention, College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Huan Peng
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Key Laboratory of Marine Animal Disease Control and Prevention, College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Anxing Li
- Key Laboratory for Aquatic Products Safety of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ruijun Li
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Key Laboratory of Marine Animal Disease Control and Prevention, College of Fisheries and Life Science, Dalian Ocean University, Dalian, China.
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11
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Gao FY, Pang JC, Wang M, Lu MX, Liu ZG, Cao JM, Ke XL, Yi MM. Structurally diverse genes encode TLR13 in Nile tilapia: The two receptors can recognize Streptococcus 23S RNA and conduct signal transduction through MyD88. Mol Immunol 2021; 132:60-78. [PMID: 33545626 DOI: 10.1016/j.molimm.2021.01.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/15/2021] [Accepted: 01/19/2021] [Indexed: 12/26/2022]
Abstract
Toll-like receptors (TLRs) play a crucial role in the innate immune system, which is the first line of defence against pathogens and pathogenic products in fish. In the present study, we cloned the full-length cDNA and genome sequences of two TLR13 s (OnTLR13a, OnTLR13b) from Nile tilapia (Oreochromis niloticus). TLR family motifs, i.e., the leucine-rich repeat (LRR) domains and Toll/interleukin (IL)-1 receptor (TIR) domains, were conserved in the putative proteins OnTLR13a and OnTLR13b, with fifteen LRR domains and one TIR domain. Four exons and three introns were identified in the OnTLR13a genome sequence, and three exons and two introns were identified in the OnTLR13b genome sequence. In healthy Nile tilapia tissues, OnTLR13a and OnTLR13b were ubiquitously expressed in all 11 tested tissues/organs. The highest expression levels were observed in the spleen (OnTLR13a) and blood (OnTLR13b), and the lowest expression levels were observed in the liver (OnTLR13a) and stomach (OnTLR13b). The expression level of OnTLR13b at 5.5 days postfertilization (dpf) was significantly higher than that at the other 8 time points (2.5, 3.5, 4.5, 5, 6, 6.5, 7.5 and 8.5 dpf). Upon stimulation with an intraperitoneal injection of 200 μL (107 CFU/mL) Streptococcus agalactiae, the expression levels of OnTLR13a and OnTLR13b were significantly upregulated in the intestine and gill. After cotransfection with MyD88, OnTLR13a significantly increased MyD88-dependent NF-κB activation in 293 T cells. However, OnTLR13b significantly impaired MyD88-dependent NF-κB activation. In addition, TLR13a slightly increased MyD88-dependent AP-1 activation, and TLR13b significantly increased MyD88-dependent AP-1 activation. TLR13a significantly increased MyD88-dependent interferon-β (IFN-β) activation, and TLR13b had no effect on MyD88-dependent IFN-β activation. These findings suggest that although the deduced protein structure of OnTLR13 is evolutionarily conserved between OnTLR13 and other TLR members, its signal transduction function is markedly different. Co-immunoprecipitation (Co-IP) assays showed that both OnTLR13a and OnTLR13b could interact with OnMyD88. RNA pulldown assays showed that TLR13a and TLR13b could combine with the 23S rRNA of S. agalactiae. These results indicate that TLR13a and TLR13b play important roles in the innate immune response against bacterial infection in Nile tilapia.
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Affiliation(s)
- Feng-Ying Gao
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
| | - Ji-Cai Pang
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Miao Wang
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
| | - Mai-Xin Lu
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China.
| | - Zhi-Gang Liu
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
| | - Jian-Meng Cao
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
| | - Xiao-Li Ke
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
| | - Meng-Meng Yi
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, China
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12
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Hu Q, Ao Q, Zhu J. Response of chemokine receptors CXCR2 and integrin β2 after Streptococcus agalactiae and Aeromonas hydrophila challenge in GIFT strain of Nile tilapia Oreochromis niloticus. Dev Comp Immunol 2021; 115:103897. [PMID: 33132113 DOI: 10.1016/j.dci.2020.103897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/12/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
CXCR2 is a G-protein-coupled cell surface chemokine receptor, and integrins are heterodimeric transmembrane (TM) glycoproteins. These proteins work together to activate neutrophils in the immune defense, but knowledge of their function in tilapia is limited. RACE technology was used to clone the full length of the Nile tilapia Oreochromis niloticus Cxcr2 gene, which included a 954 bp open reading frame encoding 318 amino acids, and the integrin β2 gene, with a 2373 bp open reading frame and 791 amino acids. Sequence analyses showed that Cxcr2 and integrin β2 are conserved among species. Expression profile was performed using qRT-PCR and indicated that Cxcr2 and integrin β2 were distributed throughout the examined organ tissues, with highest expression observed in the immune tissues. Expression of Cxcr2 and integrin β2 were increased after challenged with Streptococcus agalactiae or Aeromonas hydrophila. Results suggest that Cxcr2 and integrin β2 genes play a role in immune response in Nile tilapia and provide basic data for molecular-assistant selection of disease-resistant bloodstock to improve the production.
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Affiliation(s)
- Qiaomu Hu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, China.
| | - Qiuwei Ao
- Guangxi Academy of Fishery Sciences, Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Nanning,Guangxi 530021, China
| | - Jiajie Zhu
- Guangxi Academy of Fishery Sciences, Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Nanning,Guangxi 530021, China.
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13
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Li K, Qiu H, Yan J, Shen X, Wei X, Duan M, Yang J. The involvement of TNF-α and TNF-β as proinflammatory cytokines in lymphocyte-mediated adaptive immunity of Nile tilapia by initiating apoptosis. Dev Comp Immunol 2021; 115:103884. [PMID: 33045273 DOI: 10.1016/j.dci.2020.103884] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/06/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
Tumor necrosis factors (TNFs) are pleiotropic cytokines with important functions in homeostasis and disease pathogenesis. Recent advances have shown that TNFs are also involved in the regulation of adaptive immune responses. However, the knowledge about how TNF participates in and regulates adaptive immune response in early vertebrates is still limited. In present study, we identified two isoforms of TNF, TNF-α and TNF-β, from Nile tilapia Oreochromis niloticus (On-TNF-α and β). After analyzing the sequence characteristics, we investigated their regulatory roles in adaptive immune response of this fish species. On-TNF-α and β are evolutionarily conserved compare with their homologs from other vertebrates. Both TNFs were distributed in a wide range of tissues in O. niloticus, and with relative higher expression level in gill. After the animals were infected by Streptococcus agalactiae, mRNA levels of On-TNF-α and TNF-β in spleen lymphocytes were significantly upregulated during the primary response stage of adaptive immunity. Meanwhile, both TNF proteins in spleen lymphocytes were also dramatically elevated during the adaptive immune stage after bacterial infection. These results indicate the potential participation of On-TNF-α and TNF-β in adaptive immune response of Nile tilapia. Furthermore, On-TNF-α and β transcripts were obviously augmented, once spleen lymphocytes were activated by T cell-specific mitogen PHA. More importantly, both recombinant On-TNF-α and β could induce the apoptosis of head-kidney leukocytes of Nile tilapia. And On-TNF-β but not On-TNF-α promoted the apoptosis by activating caspase-8 in the target cells. Altogether, our study revealed that TNF-α and TNF-β participated in the lymphocyte-mediated adaptive immune response of Nile tilapia by initiating the apoptosis, and thus shed novel perspective for the regulatory mechanism of adaptive immunity in teleost.
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Affiliation(s)
- Kang Li
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Hong Qiu
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Jie Yan
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Xiaotong Shen
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Xiumei Wei
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Ming Duan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China.
| | - Jialong Yang
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai 200241, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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14
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Thu Lan NG, Salin KR, Longyant S, Senapin S, Dong HT. Systemic and mucosal antibody response of freshwater cultured Asian seabass (Lates calcarifer) to monovalent and bivalent vaccines against Streptococcus agalactiae and Streptococcus iniae. Fish Shellfish Immunol 2021; 108:7-13. [PMID: 33217566 DOI: 10.1016/j.fsi.2020.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/22/2020] [Accepted: 11/14/2020] [Indexed: 05/08/2023]
Abstract
Asian seabass, Lates calcarifer farming in Southeast Asia, encounters serious disease challenges caused by Streptococcus agalactiae and Streptococcus iniae. However, a vaccine for disease prevention is not yet available. In this study, we investigated the mucosal and systemic antibody (IgM) response kinetics of the Asian seabass following primary immunization with oil-based formalin-killed vaccines (FKVs) prepared from S. agalactiae and S. iniae (monovalent Sa, monovalent Si, and bivalent Sa-Si) and secondary booster with the respective water-based FKVs. The efficacy of vaccines was subsequently evaluated by an experimental challenge. The results revealed similar antibody response kinetics in both systemic and mucosal systems. However, the immune response in the fish vaccinated with the monovalent vaccines was superior to those fish received the bivalent vaccine in terms of specific antibody titer. The fish that received monovalent vaccines required 1-2 weeks to raise a significant level of specific antibody titer in both systemic and mucosal systems while those vaccinated with bivalent vaccine required three weeks. Following booster at day 21, both systemic and mucosal antibody titers in all vaccinated groups had reached the peak at day 28 and gradually declined in the following weeks but remained significantly higher than control until the end of the experiment (day 63). In the challenge test, both monovalent and bivalent vaccines were found to be highly efficacious, with the relative percentage survival (RPS) ranging from 75 to 85%. In summary, this study explored the 63-days antibody response kinetics (both mucosal and systemic systems) of Asian seabass to monovalent and bivalent inactivated vaccines and confirmed that the combination of S. agalactiae and S. iniae in a single injectable vaccine is possible.
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Affiliation(s)
- Nguyen Giang Thu Lan
- School of Biotechnology, International University-Vietnam National University, Ho Chi Minh City, Viet Nam; Aquaculture and Aquatic Resources Management, Department of Food, Agriculture and Bioresources, School of Environment Resources and Development, Asian Institute of Technology, Khlong Luang, Pathumthani, 12120, Thailand
| | - Krishna R Salin
- Aquaculture and Aquatic Resources Management, Department of Food, Agriculture and Bioresources, School of Environment Resources and Development, Asian Institute of Technology, Khlong Luang, Pathumthani, 12120, Thailand.
| | - Siwaporn Longyant
- Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Saengchan Senapin
- Fish Health Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand; National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Ha Thanh Dong
- Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, 10300, Thailand.
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15
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Vaz MJ, Purrier SA, Bonakdar M, Chamby AB, Ratner AJ, Randis TM. The Impact of Circulating Antibody on Group B Streptococcus Intestinal Colonization and Invasive Disease. Infect Immun 2020; 89:e00348-20. [PMID: 33077619 PMCID: PMC7927928 DOI: 10.1128/iai.00348-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 10/01/2020] [Indexed: 12/17/2022] Open
Abstract
Gastrointestinal (GI) colonization with group B Streptococcus (GBS) is an important precursor to late-onset (LO) disease in infants. The host-pathogen interactions that mediate progression to invasive disease remain unknown due, in part, to a paucity of robust model systems. Passively acquired maternal GBS-specific antibodies protect newborns from early-onset disease, yet their impact on GI colonization and LO disease is unexplored. Using murine models of both perinatal and postnatal GBS acquisition, we assessed the kinetics of GBS GI colonization, progression to invasive disease, and the role of GBS-specific IgG production in exposed offspring and juvenile mice at age 12 and 14 days, respectively. We defined LO disease as >7 days of life in the perinatal model. We studied the impact of maternal immunization using a whole-cell GBS vaccine on the duration of intestinal colonization and progression to invasive disease after postnatal GBS exposure in offspring. Animals exhibit sustained GI colonization following both perinatal and postnatal exposure to GBS, with 21% and 27%, respectively, developing invasive disease. Intestinal colonization with GBS induces an endogenous IgG response within 20 days of exposure. Maternal vaccination with whole-cell GBS induces production of GBS-specific IgG in dams that is vertically transmitted to their offspring but does not decrease the duration of GBS intestinal colonization or reduce LO mortality following postnatal GBS exposure. Both perinatal and postnatal murine models of GBS acquisition closely recapitulate the human disease state, in which GBS colonizes the intestine and causes LO disease. We demonstrate both endogenous production of anti-GBS IgG in juvenile mice and vertical transfer of antibodies to offspring following maternal vaccination. These models serve as a platform to study critical host-pathogen interactions that mediate LO GBS disease.
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Affiliation(s)
- Michelle J Vaz
- Department of Pediatrics, NYU School of Medicine, New York, New York, USA
| | - Sheryl A Purrier
- Department of Pediatrics, Yale School of Medicine, New Haven, Connecticut, USA
| | - Maryam Bonakdar
- Pathobiology Graduate Program, Brown University, Providence, Rhode Island, USA
| | - Anna B Chamby
- The University of Vermont, Larner College of Medicine, Burlington, Vermont, USA
| | - Adam J Ratner
- Department of Pediatrics, NYU School of Medicine, New York, New York, USA
- Department of Microbiology, NYU School of Medicine, New York, New York, USA
| | - Tara M Randis
- Department of Pediatrics, University of South Florida, Tampa, Florida, USA
- Department of Molecular Medicine, University of South Florida, Tampa, Florida, USA
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16
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Carboni F, Adamo R. Structure-based glycoconjugate vaccine design: The example of Group B Streptococcus type III capsular polysaccharide. Drug Discov Today Technol 2020; 35-36:23-33. [PMID: 33388125 DOI: 10.1016/j.ddtec.2020.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 10/22/2020] [Accepted: 11/05/2020] [Indexed: 06/12/2023]
Abstract
Microbial surface polysaccharides are important virulence factors and targets for vaccine development. Glycoconjugate vaccines, obtained by covalently linking carbohydrates and proteins, are well established tools for prevention of bacterial infections. Elucidation of the minimal portion involved in the interactions with functional antibodies is of utmost importance for the understanding of their mechanism of induction of protective immune responses and the design of synthetic glycan based vaccines. Typically, this is achieved by combination of different techniques, which include ELISA, glycoarray, Surface Plasmon Resonance in conjunction with approaches for mapping at atomic level the position involved in binding, such as Saturation Transfer NMR and X-ray crystallography. This review provides an overview of the structural studies performed to map glycan epitopes (glycotopes), with focus on the highly complex structure of Group B Streptococcus type III (GBSIII) capsular polysaccharide. Furthermore, it describes the rational process followed to translate the obtained information into the design of a protective glycoconjugate vaccine based on a well-defined synthetic glycan epitope.
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17
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Ramos-Espinoza FC, Cueva-Quiroz VA, Yunis-Aguinaga J, Alvarez-Rubio NC, Paganoti de Mello N, Engrácia de Moraes JR. Efficacy of two adjuvants administrated with a novel hydrogen peroxide-inactivated vaccine against Streptococcus agalactiae in Nile tilapia fingerlings. Fish Shellfish Immunol 2020; 105:350-358. [PMID: 32717322 DOI: 10.1016/j.fsi.2020.07.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/08/2020] [Accepted: 07/22/2020] [Indexed: 05/26/2023]
Abstract
Streptococcus agalactiae is considered the main bacterial pathogen in cultured Nile tilapia. Formaldehyde-inactivated vaccines are the most accepted method for prevention and control of the disease. However, alternative inactivation methods for S. agalactiae vaccines have not been fully explored. Recently, we developed a hydrogen peroxide-inactivated vaccine against S. agalactiae with moderate efficacy, with the possibility to improve vaccine efficacy by adding adjuvants. The current study compared the efficacy of aluminum hydroxide and Freund's incomplete adjuvant (FIA) incorporated into a novel hydrogen peroxide-inactivated intraperitoneal vaccine against S. agalactiae for Nile tilapia fingerlings. The relative percentage survival (RPS) for aluminum hydroxide-adjuvanted vaccine (59.3%), and FIA-adjuvanted vaccine (77.8%) were higher than the vaccine without adjuvant (40.7%). In addition, fish immunized with aluminum hydroxide-adjuvanted vaccine had significantly higher levels of specific antibodies than control fish at 4 weeks post vaccination (wpv). Blood lymphocytes counts showed a decrease in vaccinated groups when compared to control fish, suggesting white cells migration to the tissues where antigen presentation is ongoing. Fish that received FIA-adjuvanted vaccine exhibited persistence of adjuvant deposits on intraperitoneal surfaces for at least 4 wpv that may be related to its superior performance compared to aluminum hydroxide adjuvanted vaccine, which did not evidence any type of deposit at any sampling times. The results observed in this study demonstrate that hydrogen peroxide-inactivated vaccine administered with either aluminum hydroxide or FIA induce optimal levels of protection, with a superior performance for FIA vaccine, which could be a good alternative to conventional formaldehyde-inactivated vaccines against S. agalactiae, due to its shorter manufacture time, and less toxicity.
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Affiliation(s)
- Fernando Carlos Ramos-Espinoza
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Victor Alexander Cueva-Quiroz
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Jefferson Yunis-Aguinaga
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil; Aquatic Pathobiology Laboratory, Sea Institute of Peru (IMARPE), Esquina Gamarra y GeneralValle s/n, Chucuito, Callao, Peru
| | - Norquis Caled Alvarez-Rubio
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Nicoli Paganoti de Mello
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil
| | - Julieta Rodini Engrácia de Moraes
- Aquaculture Center of Unesp (Caunesp), Sao Paulo State University (Unesp). Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil; Department of Veterinary Pathology, School of Agricultural and Veterinary Sciences (FCAV), Unesp, Via Prof. Paulo Donato Castellane, km 05, 14884-900, Jaboticabal, SP, Brazil.
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18
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Ma Y, Hao L, Liang Z, Ma J, Ke H, Kang H, Yang H, Wu J, Feng G, Liu Z. Characterization of novel antigenic vaccine candidates for nile tilapia (Oreochromis niloticus) against Streptococcus agalactiae infection. Fish Shellfish Immunol 2020; 105:405-414. [PMID: 32712231 DOI: 10.1016/j.fsi.2020.07.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/23/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Streptococcus agalactiae is one of the important pathogens responsible for high mortality and economic losses of the tilapia industry worldwide. Based on ten serovars of S. agalactiae infection, subunit vaccine with conserved antigens is promising strategy corresponding stimulated long-term immunity and provides protection for animals against different serotypes of S. agalactiae. In the present study, eight proteins (AP, AL, LivK, ESAT6, essA, essB, essC and esaA) were selected from the S. agalactiae serotype Ia genome as immunogenic antigens with bioinformation and immune experiment assays. These recombinant proteins were successfully obtained through expression in Escherichia coli and the immunogenicity was assessed in tilapia challenge model. The results showed that the recombinant proteins caused high-level-specific antibodies production and high lysozyme activities, suggesting that the recombinant proteins induced specific humoral immune response and innate immune response of tilapia. The signficant increase were observed in the cytokines levels of TNF-α, IL-1β, IFN-γ, cc1, cc2 and immune-related genes levels of CD8α and MHC factors in the spleen and head kidney tissues, suggesting that the recombinant proteins induced immune response of tilapia through cytokines signal pathway and activated high cytotoxic T-lymphocyte (CTL) activity of tilapia. Furthermore, vaccinated tilapia conferred high levels of protection against challenge with a lethal dose of highly virulent serovar Ⅰa (highest RPS was 91.60% in AL and essC protein groups). Our results indicated that the eight recombinant proteins induced high level of immune responses and offered protection against S. agalactiae infection, could be potential subunit vaccine candidates.
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Affiliation(s)
- Yanping Ma
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Le Hao
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Zhiling Liang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Jiangyao Ma
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Hao Ke
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Huahua Kang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China; Zhaoqing Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Zhaoqing, China
| | - Hongwei Yang
- College of Animal Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Jing Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Guoqing Feng
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China
| | - Zhenxing Liu
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences; Key Laboratory of Livestock Disease Prevention of Guangdong Province; Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, PRC, Guangzhou, China.
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19
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Oldrini D, del Bino L, Arda A, Carboni F, Henriques P, Angiolini F, Quintana JI, Calloni I, Romano MR, Berti F, Jimenez‐Barbero J, Margarit I, Adamo R. Structure-Guided Design of a Group B Streptococcus Type III Synthetic Glycan-Conjugate Vaccine. Chemistry 2020; 26:7018-7025. [PMID: 32058627 PMCID: PMC7317837 DOI: 10.1002/chem.202000284] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 01/17/2020] [Revised: 02/13/2020] [Indexed: 12/15/2022]
Abstract
Identification of glycan functional epitopes is of paramount importance for rational design of glycoconjugate vaccines. We recently mapped the structural epitope of the capsular polysaccharide from type III Group B Streptococcus (GBSIII), a major cause of invasive disease in newborns, by using a dimer fragment (composed of two pentasaccharide repeating units) obtained by depolymerization complexed with a protective mAb. Although reported data had suggested a highly complex epitope contained in a helical structure composed of more than four repeating units, we showed that such dimer conjugated to a carrier protein with a proper glycosylation degree elicited functional antibodies comparably to the full-length conjugated polysaccharide. Here, starting from the X-ray crystallographic structure of the polysaccharide fragment-mAb complex, we synthesized a hexasaccharide comprising exclusively the relevant positions involved in binding. Combining competitive surface plasmon resonance and saturation transfer difference NMR spectroscopy as well as in-silico modeling, we demonstrated that this synthetic glycan was recognized by the mAb similarly to the dimer. The hexasaccharide conjugated to CRM197 , a mutant of diphtheria toxin, elicited a robust functional immune response that was not inferior to the polysaccharide conjugate, indicating that it may suffice as a vaccine antigen. This is the first evidence of an X-ray crystallography-guided design of a synthetic carbohydrate-based conjugate vaccine.
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Affiliation(s)
- Davide Oldrini
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | - Linda del Bino
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | - Ana Arda
- Chemical Glycobiology Lab, CIC bioGUNEBasque Research Technology Alliance (BRTA)Bizkaia Technology Park48160DerioSpain
| | - Filippo Carboni
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | - Pedro Henriques
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | | | - Jon I. Quintana
- Chemical Glycobiology Lab, CIC bioGUNEBasque Research Technology Alliance (BRTA)Bizkaia Technology Park48160DerioSpain
| | - Ilaria Calloni
- Chemical Glycobiology Lab, CIC bioGUNEBasque Research Technology Alliance (BRTA)Bizkaia Technology Park48160DerioSpain
| | - Maria R. Romano
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | - Francesco Berti
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
| | - Jesus Jimenez‐Barbero
- Chemical Glycobiology Lab, CIC bioGUNEBasque Research Technology Alliance (BRTA)Bizkaia Technology Park48160DerioSpain
- IkerbasqueBasque Foundation for Science48013BilbaoBizkaiaSpain
- Department Organic Chemistry IIUniversity of the Basque Country UPV/EHU48940LeioaBizkaiaSpain
| | | | - Roberto Adamo
- Research CenterGlaxoSmithKline PlcVia Fiorentina 153100SienaItaly
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20
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Ahmed N, Giorgakoudi K, Usuf E, Okomo U, Clarke E, Kampmann B, Le Doare K, Trotter C. Potential cost-effectiveness of a maternal Group B streptococcal vaccine in The Gambia. Vaccine 2020; 38:3096-3104. [PMID: 32147298 DOI: 10.1016/j.vaccine.2020.02.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/18/2020] [Accepted: 02/24/2020] [Indexed: 01/16/2023]
Abstract
OBJECTIVE To estimate neonatal health benefits and healthcare provider costs of a theoretical Group B streptococcal (GBS) hexavalent maternal vaccination programme in The Gambia, a low-income setting in West Africa. METHODS A static decision analytic cost-effectiveness model was developed from the healthcare provider perspective. Demographic data and acute care costs were available from studies in The Gambia undertaken in 2012-2015. Further model parameters were taken from United Nations and World Health Organisation sources, supplemented by data from a global systematic review of GBS and literature searches. As vaccine efficacy is not known, we simulated vaccine efficacy estimates of 50-90%. Costs are reported in US dollars. Cost-effectiveness thresholds of one (US$473, very cost effective) and three (US$1420, cost effective) times Gambian GDP were used. RESULTS Vaccination with a hexavalent vaccine would avert 24 GBS disease cases (55%) and 768 disability adjusted life years compared to current standard of care (no interventions to prevent GBS disease). At vaccine efficacy of 70%, the programme is cost-effective at a maximum vaccine price per dose of 12 US$ (2016 US$), and very cost-effective at a maximum of $3/dose. The total costs of vaccination at $12 is $1,056,962 for one annual cohort of Gambian pregnant women. One-way sensitivity analysis showed that GBS incidence was the most influential parameter on the cost effectiveness ratio. CONCLUSION The introduction of a hexavalent vaccine would considerably reduce the current burden of GBS disease in The Gambia but to be cost-effective, the vaccine price per dose would need to be $12/dose or less.
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Affiliation(s)
- N Ahmed
- Imperial College London, London, UK
| | - K Giorgakoudi
- School of Health Sciences, City, University of London, London, UK; NIHR Biomedical Research Centre, Royal Marsden NHS Foundation Trust, Insititute of Cancer Research, London, UK
| | - E Usuf
- Medical Research Council Unit The Gambia (MRCG) @LSHTM, Fajara, Gambia
| | - U Okomo
- Medical Research Council Unit The Gambia (MRCG) @LSHTM, Fajara, Gambia
| | - E Clarke
- Medical Research Council Unit The Gambia (MRCG) @LSHTM, Fajara, Gambia
| | - B Kampmann
- Medical Research Council Unit The Gambia (MRCG) @LSHTM, Fajara, Gambia
| | - K Le Doare
- Medical Research Council Unit The Gambia (MRCG) @LSHTM, Fajara, Gambia; St George's University of London, London, UK; West African Global Health Alliance, Dakar, Senegal
| | - C Trotter
- University of Cambridge, Cambridge, UK.
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21
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Zhang D, Gao Y, Li Q, Ke X, Liu Z, Lu M, Shi C. An effective live attenuated vaccine against Streptococcus agalactiae infection in farmed Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2020; 98:853-859. [PMID: 31751658 DOI: 10.1016/j.fsi.2019.11.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 10/19/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Streptococcus agalactiae is an important pathogen associated with various aquatic animals, especially tilapia. Streptococcosis has greatly limited the healthy development of tilapia aquaculture in recent times. The development of novel effective vaccines is important for the prevention and control of streptococcosis in fish. We previously constructed a non-encapsulated S. agalactiae strain △cps by the in-frame deletion method. Here, we evaluated whether this mutant △cps is safe for tilapia and suitable for protection against streptococcosis. We observed that the △cps strain was non-pathogenic to tilapia, and there was no reversion of virulence when it was passaged in tilapia. Moreover, the △cps strain survived for at least 11 d in the main immune organs of tilapia. The tilapia vaccinated via intraperitoneal (IP) injection with △cps strain induced a high antibody titer, and the IgM antibody levels were significantly higher in the vaccinated group than in the control group. The vaccination protected tilapia against the S. agalactiae challenge with a relative percent survival of 90.47%. In addition, tilapia immunized with the △cps strain showed significantly higher expression level of IFN-γ, IL-1β, MyD88, IgM, and MHC-Iα in the head kidney than those in the control during the entire observation period. The expression of MHC-IIβ was inhibited during 1-7 d of immunization. These results revealed that the △cps strain is able to induce humoral and cell-mediated immune response in tilapia. Therefore, the strain △cps has a broad application prospect as a target for attenuation in vaccine development.
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Affiliation(s)
- Defeng Zhang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Yanxia Gao
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Qingyong Li
- Fisheries Research and Extension Center of Huizhou, Huizhou, 516002, China
| | - Xiaoli Ke
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Zhigang Liu
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Maixin Lu
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China.
| | - Cunbin Shi
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China; Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
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22
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Wang Q, Fu T, Li X, Luo Q, Huang J, Sun Y, Wang X. Cross-immunity in Nile tilapia vaccinated with Streptococcus agalactiae and Streptococcus iniae vaccines. Fish Shellfish Immunol 2020; 97:382-389. [PMID: 31841691 DOI: 10.1016/j.fsi.2019.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/01/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
Streptococcus agalactiae and Streptococcus iniae are major bacterial pathogens of tilapia that can cause high mortality concomitant with large economic losses to aquaculture. Although development of vaccines using formalin-killed bacteria to control these diseases has been attempted, the mechanism of immunity against streptococcal infections and the cross-protective ability of these two bacteria remains unclear. To explore the immunological role of these vaccines, we compared the immune responses of tilapia after immunization with both vaccines and compared the relative percent survival (RPS) and cross-immunization protection of tilapia after separate infection with S. agalactiae and S. iniae. All results revealed that vaccinated fish had significantly higher (P < 0.05) levels of specific antibodies than control fish 14 days post secondary vaccination (PSV) and 7 days post challenge. In vaccinated fish, the mRNA expression of interleukin-8 (IL-8), interleukin-12 (IL-12), caspase-3 (C-3), tumour necrosis factor (TNF), and interferon (IFN) was significantly up regulated (P < 0.05) in the head kidney after immunized; similar results were found for IL-8, TNF and IFN in the posterior kidney, meanwhile the expression levels of C-3 and IFN were significantly increased (P < 0.05) in the spleen of vaccinated fish. Additionally, the levels of acid phosphatase (ACP), alkaline phosphatase (AKP), superoxide dismutase (SOD), and lysozyme (LZM) in vaccinated fish were improved at different degree when compared to the control fish. These results showed that vaccination with formalin-killed cells (FKCs) of either S. agalactiae or S. iniae conferred protection against infection by the corresponding pathogen in Nile tilapia, resulting in RPS values of 92.3% and 91.7%, respectively. Furthermore, cross-protection was observed, as the S. agalactiae FKC vaccine protected fish from S. iniae infection, and vice versa. These results suggested that the S. agalactiae and S. iniae FKC vaccines can induce immune responses and generate excellent protective effects in Nile tilapia.
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Affiliation(s)
- Qishuo Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China
| | - Tianzeng Fu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 272000, PR China
| | - Xincang Li
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, PR China
| | - Qian Luo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Jinjing Huang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Yongcan Sun
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Xuepeng Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 272000, PR China.
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23
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Kurian A, Van Doan H, Tapingkae W, Elumalai P. Modulation of mucosal parameters, innate immunity, growth and resistance against Streptococcus agalactiae by enrichment of Nile tilapia (Oreochromis niloticus) diet with Leucas aspera. Fish Shellfish Immunol 2020; 97:165-172. [PMID: 31846780 DOI: 10.1016/j.fsi.2019.12.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/11/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
The present study aimed at evaluating the possible effects of Leucas aspera as immunostimulant on mucosal and serum immunity, as well as on growth and resistance against Streptococcus agalactiae infection in Nile tilapia (Oreochromis niloticus) fingerlings. In a 45 days trial, fish were fed experimental diets containing L. aspera 0 g kg-1 (Diet 1- control), 1 g kg-1 (Diet 2), 2 g kg-1(Diet 3), 4 g kg-1 (Diet 4) and 8 g kg-1 (Diet 5). The results revealed a significant increase in the specific growth rate (SGR), weight gain (WG), and final weight (FW) in fish fed diet 3 (2 g kg-1) of L. aspera compared to the control and other supplemented groups (P < 0.05). Also, feeding on diet 3 (2 g kg-1) of L. aspera enriched diet significantly (P < 0.05) increased lysozyme activities in the serum and mucus, serum peroxidase and phagocytosis activity. However, significant (P < 0.05) increase in mucus peroxidase activity was reported in fish fed diet 4 (4 g kg-1) and diet 5 (8 g kg-1) of L. aspera, whereas significantly higher (P < 0.05) alternative complement activity was reported in fish fed diet 2 (1 g kg-1) of L. aspera. At the end of the experiment, nine fish per replication were selected for a challenge test against S. agalactiae. The dietary supplementation of L. aspera significantly reduced the mortality rate and increased the resistance of Nile tilapia following by challenge with S. agalactiae. The highest post challenge survival of 100% was observed in tilapia fed diet 5 (8 g kg-1) following by 92.6% of RPS in fish fed diet 4 (4 g kg-1) and 88.9% in diet 3 (2 g kg-1), 77.8% in diet 2 (1 g kg-1) and 74.1% in diet 1(0 g kg-1).
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Affiliation(s)
- Amitha Kurian
- School of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies Panangad, Kochi, 682 506, Kerala, India
| | - Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Wanaporn Tapingkae
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Preetham Elumalai
- School of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies Panangad, Kochi, 682 506, Kerala, India.
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24
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Han XQ, Gao F, Lu M, Liu ZG, Wang M, Ke XL, Gao YX. Identification and characterisation of tumour necrosis factor receptor (TNFR) associated factor 3 from Nile tilapia, Oreochromis niloticus. J Fish Biol 2020; 96:185-193. [PMID: 31721203 DOI: 10.1111/jfb.14203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
In this study, we cloned the complementary (c)DNA sequences of tumour necrosis factor receptor (TNFR)-associated factor 3 (traf3) in Nile tilapia, Oreochromis niloticus. The expression patterns of the traf3 gene were investigated and preliminary functional analyses were performed. In healthy fish, traf3 transcript was broadly expressed in all examined tissues, with the highest expression level in the blood and the lowest in the liver. The traf3 gene reached its highest expression at 8 days post-fertilisation (dpf) during embryonic development. Moreover, we found that expression of traf3 was clearly altered following stimulation with Streptococcus agalactiae in vivo and that traf3 could be induced by lipopolysaccharides (LPS), Poly I: C and S. agalactiae WC1535 in Nile tilapia macrophages. Overexpression in 293T cells showed that Traf3 protein was mainly distributed in the cytoplasm and could significantly increase nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation. Taken together, these results implied that traf3 could play important roles in the immune response to pathogen invasion.
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Affiliation(s)
- Xue-Qing Han
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
- National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
| | - Fengying Gao
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
| | - Maixin Lu
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
| | - Zhi-Gang Liu
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
| | - Miao Wang
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
| | - Xiao-Li Ke
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
| | - Yan-Xia Gao
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou, China
- National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China
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25
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Niu J, Huang Y, Liu X, Luo G, Tang J, Wang B, Lu Y, Cai J, Jian J. Functional characterization of galectin-3 from Nile tilapia (Oreochromis niloticus) and its regulatory role on monocytes/macrophages. Fish Shellfish Immunol 2019; 95:268-276. [PMID: 31655269 DOI: 10.1016/j.fsi.2019.10.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 10/18/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Galectin-3 is a kind of β-galactoside-binding lectin involved in host defense against pathogen infection. However, the immune functions of fish galectin-3 remain poorly understood. In this study, the roles of a fish galectin-3 (OnGal-3) from Nile tilapia (Oreochromis niloticus) on the binding activity on bacterial pathogens or PAMPs, the agglutinating activity on bacterial pathogens and the regulatory effects on monocytes/macrophages activity were investigated. After in vitro challenge of Streptococcus agalactiae and Aeromonas hydrophila, OnGal-3 expressions were significantly up-regulated in monocytes/macrophages. In addition, recombinant OnGal-3(rOnGal-3) protein showed strong binding activity on bacterial pathogens or PAMPs. Also, rOnGal-3 agglutinated Gram-positive and Gram-negative bacteria. Moreover, rOnGal-3 could induce the inflammatory factors expressions in monocytes/macrophages and enhance phagocytosis and respiratory burst activity of monocytes/macrophages. These results suggest that fish galectin-3 participates in anti-bacterial immune response through recognizing pathogens and modulating monocytes/macrophages activity.
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Affiliation(s)
- Jinzhong Niu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China
| | - Yu Huang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China
| | - Xinchao Liu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China
| | - Guoling Luo
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China
| | - Jufen Tang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China
| | - Bei Wang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China
| | - Yishan Lu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China
| | - Jia Cai
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China; Guangxi Key Lab for Marine Biotechnology, Guangxi Institute of Oceanography, Guangxi Academy of Sciences, Beihai, 536000, China.
| | - Jichang Jian
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, China.
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26
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Vekemans J, Moorthy V, Friede M, Alderson MR, Sobanjo-Ter Meulen A, Baker CJ, Heath PT, Madhi SA, Mehring-Le Doare K, Saha SK, Schrag S, Kaslow DC. Maternal immunization against Group B streptococcus: World Health Organization research and development technological roadmap and preferred product characteristics. Vaccine 2019; 37:7391-7393. [PMID: 29398277 PMCID: PMC6892248 DOI: 10.1016/j.vaccine.2017.09.087] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 09/28/2017] [Indexed: 01/08/2023]
Abstract
Group B streptococcus, found in the vagina or lower gastrointestinal tract of about 10-40% of women of reproductive age, is a leading cause of early life invasive bacterial disease, potentially amenable to prevention through maternal immunization during pregnancy. Following a consultation process with global stakeholders, the World Health Organization is herein proposing priority research and development pathways and preferred product characteristics for GBS vaccines, with the aim to facilitate and accelerate vaccine licensure, policy recommendation for wide scale use and implementation.
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Affiliation(s)
| | | | | | | | | | | | - Paul T Heath
- Vaccine Institute, St Georges, University of London, London, UK
| | - Shabir A Madhi
- Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | | | - Samir K Saha
- Child Health Research Foundation, Dhaka Shishu Hospital, Institute of Child Health, Dhaka, Bangladesh
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27
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Li L, Liu Y, Huang T, Liang W, Chen M. Development of an attenuated oral vaccine strain of tilapia Group B Streptococci serotype Ia by gene knockout technology. Fish Shellfish Immunol 2019; 93:924-933. [PMID: 31374315 DOI: 10.1016/j.fsi.2019.07.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
Our previous studies demonstrated that the deletion of D2 fragment in tilapia Streptococcus agalactiae(GBS) attenuated strain YM001 is the main reason for the loss of virulence to tilapia. In this study, a Δ2 mutant that deletion of D2 fragment in parental virulent strain HN016 was constructed, and the safety, stability, immunogenicity, and growth characteristics, as well as the virulence mechanism of Δ2 mutant were evaluated. The results showed that Δ2 mutant was not pathogenic to tilapia, and the virulent revertants were not observed after 50 generations of passage. The RPS reached 96.11% at 15 days and 93.05% at 30 days, respectively, after intraperitoneal injection, while RPS reached 74.80% at 15 days and 53.16% at 30 days, respectively, after oral immunization. The growth of Δ2 mutant was significantly faster than YM001, and genes that were enriched in the nitrogen metabolism and arginine biosynthesis signaling pathway (arc, glnA, and gdhA) were identified as important candidate genes responsible for growth rate of S. agalactiae. The absence of D2 fragment affected the expression of Sip, therefore influencing the bacterial virulence. Altogether, this study demonstrated that deletion of D2 fragment in HN016 causes the loss of virulence to tilapia, and Δ2 mutant is a promising, better attenuated oral vaccine strain of S. agalactiae compared to YM001.
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Affiliation(s)
- Liping Li
- Guangxi Academy of Fishery Sciences, Qingshan Road NO.8, Nanning, 530021, China
| | - Yu Liu
- Guangxi Academy of Fishery Sciences, Qingshan Road NO.8, Nanning, 530021, China
| | - Ting Huang
- Guangxi Academy of Fishery Sciences, Qingshan Road NO.8, Nanning, 530021, China
| | - Wanwen Liang
- Guangxi Academy of Fishery Sciences, Qingshan Road NO.8, Nanning, 530021, China
| | - Ming Chen
- Guangxi Academy of Fishery Sciences, Qingshan Road NO.8, Nanning, 530021, China.
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28
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Laith AA, Abdullah MA, Nurhafizah WWI, Hussein HA, Aya J, Effendy AWM, Najiah M. Efficacy of live attenuated vaccine derived from the Streptococcus agalactiae on the immune responses of Oreochromis niloticus. Fish Shellfish Immunol 2019; 90:235-243. [PMID: 31009810 DOI: 10.1016/j.fsi.2019.04.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/30/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
Streptococcus agalactiae species have been recognized as the main pathogen causing high mortality in fish leading to significant worldwide economical losses to the aquaculture industries. Vaccine development has become a priority in combating multidrug resistance in bacteria; however, there is a lack of commercial live attenuated vaccine (LAV) against S. agalactiae in Malaysia. The aim of this study is to compare two methods using attenuated bacteria as live vaccine and to evaluate the efficacy of selected LAV on the immune responses and resistance of Oreochromis niloticus (tilapia) against S. agalactiae. The LAV derived from S. agalactiae had been weakened using the chemical agent Acriflavine dye (LAV1), whereas the second vaccine was weakened using serial passages of bacteria on broth media (LAV2). Initial immunization was carried out only on day one, given twice-in the morning and evening, for the 42 day period. Serum samples were collected to determine the systemic antibody (IgM) responses and lysozymal (LSZ) activity using ELISA. On day 43 after immunization, the fish were injected intraperitoneally (i.p) with 0.1 mL of S. agalactiae at LD50 = 1.5 × 105 (CFU)/fish. Fish were monitored daily for 10 days. Clinical signs, mortality and the relative percent of survival (RPS) were recorded. Trial 1 results showed a significant increased (P < 0.05) in serum IgM titers and LSZ activity as compared to LAV2 and the control group (unvaccinated fish). The efficacy of LAV1 was proven effective as determined by the RPS values, LAV1 at 81.58% as compared to LAV2 at 65.79%. Trial 2 of LAV1 and control group were further determined by administering primary and booster doses revealed a RPS value for LAV1 of 82.05%, with the significant enhancement on the immune responses of tilapia as compared to control group. In conclusion, LAV revealed to elevate antibody IgM levels, LSZ activity and provide long-term protection when added to feed. LAV is a low-cost vaccine shown to rapidly increase the immune response of fish and increase survival rates of fish against S. agalactiae infection.
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Affiliation(s)
- A A Laith
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - M A Abdullah
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - W W I Nurhafizah
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - H A Hussein
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - J Aya
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - A W M Effendy
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - M Najiah
- School of Fisheries and Aquaculture Sciences, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Tropical Aquaculture, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
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29
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Bian X, Wu S, Yin X, Mu L, Yan F, Kong L, Guo Z, Wu L, Ye J. Lyn is involved in host defense against S. agalactiae infection and BCR signaling in Nile tilapia (Oreochromis niloticus). Dev Comp Immunol 2019; 96:1-8. [PMID: 30822451 DOI: 10.1016/j.dci.2019.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Lyn, a member of Src protein kinase family, plays a crucial role in immune reactions against pathogenic infection. In this study, Lyn from Nile tilapia (Oreochromis niloticus) (OnLyn) was identified and characterized at expression pattern against bacterial infection, and regulation function in BCR signaling. The open reading frame of OnLyn contained 1536 bp of nucleotide sequence encoded a protein of 511 amino acids. The OnLyn protein was highly conversed to other species Lyn, including SH3, SH2 and a catalytic Tyr kinase (TyrKc) domain. Transcriptional expression analysis revealed that OnLyn was detected in all examined tissues and was highly expressed in the head kidney. The up-regulation OnLyn expression was observed in the head kidney and spleen following challenge with Streptococcus agalactiae (S. agalactiae) in vivo, and was also displayed in head kidney leukocytes challenge with S. agalactiae and LPS in vitro. In addition, after induction with mouse anti-OnIgM mAb in vitro, the OnLyn expression and phosphorylation of OnLyn (Y507) were significantly up-regulated in the head kidney leukocytes. Moreover, after treatment with AZD0530 and mouse anti-OnIgM monoclonal antibody, the down-regulation of cytoplasmic free-Ca2+ concentration was detected in the head kidney leukocytes in vitro. Taken together, the findings of this study revealed that OnLyn might play potential roles in BCR signaling and get involved in host defense against bacterial infection in Nile tilapia.
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Affiliation(s)
- Xia Bian
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Siwei Wu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Xiaoxue Yin
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Liangliang Mu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Fangfang Yan
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Linghe Kong
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Zheng Guo
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Liting Wu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China.
| | - Jianmin Ye
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China.
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30
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Abu-Elala NM, Samir A, Wasfy M, Elsayed M. Efficacy of Injectable and Immersion Polyvalent Vaccine against Streptococcal Infections in Broodstock and Offspring of Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2019; 88:293-300. [PMID: 30807857 DOI: 10.1016/j.fsi.2019.02.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 05/19/2023]
Abstract
A vaccine against streptococcosis, lactococcosis and enterococcosis in tilapia was formulated, ME-VAC Aqua Strept, as a polyvalent inactivated vaccine containing Streptococcus agalactiae, S. iniae, Lactococcus garvieae and Enterococcus faecalis along with a nano-particulate adjuvant. Use of ME-VAC Aqua Strept by injection or immersion resulted in an improved non-specific and adaptive immunity of broodstock and offspring. Intra-peritoneal vaccination of tilapia broodstock increased the total leukocyte count, phagocytosis, lysozyme activity, antibody titer, number of seeds/vaccinated broodstock, seeds quality and survival rates. Also, immersion mass vaccination of tilapia larvae provided a long period of protection up to three months, with a relative percent of survivability (RPS) not less than 60% at this time. To our knowledge, this vaccine may be the first to offer a combined protection against streptococcosis, lactococcosis and enterococcosis in tilapia. The results support the use of this vaccine as an effective tool for disease control and well-being of fish.
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Affiliation(s)
- Nermeen M Abu-Elala
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.
| | - Ahmed Samir
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.
| | - Momtaz Wasfy
- Middle East for Veterinary Vaccines Company, Second Industrial Area, ElSalihya El-Gededa, El-Sharkia, 44671, Egypt.
| | - Magdy Elsayed
- Department of Infectious Disease, Faculty of Veterinary Medicine, Cairo University, Egypt. Middle East for Veterinary Vaccines Company, Second Industrial Area, ElSalihya El-Gededa, El-Sharkia, 44671, Egypt.
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31
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Yin X, Yang Y, Han K, Wu L, Wu H, Bian X, Wei X, Guo Z, Mu L, Ye J. Purification and functional characterization of serum transferrin from Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2019; 88:36-46. [PMID: 30831243 DOI: 10.1016/j.fsi.2019.02.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/22/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Transferrin (TF), an iron-binding multifunctional protein, could participate in the iron-withholding strategy, an effective antimicrobial defense mechanism in innate immunity, and is involved in host defense against pathogenic infection. In this study, a TF homologue (OnTF) was purified from serum of Nile tilapia (Oreochromis niloticus) through a two-step affinity chromatography, and characterized its antibacterial function and the role in inflammatory response. The identification by mass spectrometry showed that peptide sequence of the purified OnTF was highly consistent with its amino acids sequence, containing two conserved iron binding lobes: N-lobe and C-lobe. The native OnTF was able to bond iron ions, and possessed capability to inhibit the growth of both bacterial pathogens (Streptococcus agalactiae and Aeromonas hydrophila) in vitro. Upon infections of S. agalactiae and A. hydrophila, the expression of OnTF protein was significantly up-regulated in vivo and in vitro. In addition, the OnTF participated in the regulation of inflammation, migration, and enhancement of phagocytosis and respiratory burst activity in head kidney macrophages/monocytes. Taken together, the results of this study indicated that OnTF is likely to involve in innate immunity to play a role in host defense against bacterial infection in Nile tilapia.
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Affiliation(s)
- Xiaoxue Yin
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Yanjian Yang
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Kailiang Han
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Liting Wu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Hairong Wu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Xia Bian
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Xiufang Wei
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Zheng Guo
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China
| | - Liangliang Mu
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China.
| | - Jianmin Ye
- School of Life Sciences, South China Normal University, Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou, 510631, PR China.
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32
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Liu L, Lu DQ, Xu J, Luo HL, Li AX. Development of attenuated erythromycin-resistant Streptococcus agalactiae vaccine for tilapia (Oreochromis niloticus) culture. J Fish Dis 2019; 42:693-701. [PMID: 30893488 DOI: 10.1111/jfd.12977] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/11/2019] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
Streptococcus agalactiae is an important pathogen in fish, causing great losses of intensive tilapia farming. To develop a potential live attenuated vaccine, a re-attenuated S. agalactiae (named TFJ-ery) was developed from a natural low-virulence S. agalactiae strain TFJ0901 through selection of resistance to erythromycin. The biological characteristics, virulence, stability and the immunization protective efficacy to tilapia of TFJ-ery were determined. The results indicated that TFJ-ery grew at a slower rate than TFJ0901. The capsule thickness of TFJ-ery was significantly less (p < 0.05) than TFJ0901. When Nile tilapia were intraperitoneally (IP) injected with TFJ-ery, the mortality of fish was decreased than that injected with TFJ0901. The RPS of fish immunized with TFJ-ery at a dose of 5.0 × 107 CFU was 95.00%, 93.02% and 100.00% at 4, 8 and 16 weeks post-vaccination, respectively. ELISA results showed that the vaccinated fish produced significantly higher (p < 0.05) antibody titres compared to those of control at 2 or 4 weeks post-vaccination. Taken together, our results suggest that erythromycin could be used to attenuate S. agalactiae, and TFJ-ery is a potent attenuated vaccine candidate to protect tilapia against S. agalactiae infections.
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Affiliation(s)
- Ling Liu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Dan-Qi Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Jun Xu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Heng-Li Luo
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - An-Xing Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China
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Yao YY, Chen DD, Cui ZW, Zhang XY, Zhou YY, Guo X, Li AH, Zhang YA. Oral vaccination of tilapia against Streptococcus agalactiae using Bacillus subtilis spores expressing Sip. Fish Shellfish Immunol 2019; 86:999-1008. [PMID: 30590166 DOI: 10.1016/j.fsi.2018.12.060] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 12/21/2018] [Accepted: 12/23/2018] [Indexed: 06/09/2023]
Abstract
Streptococcus agalactiae infections are becoming an increasing problem in aquaculture because of significant morbidity and mortality, which restricts the healthy development of tilapia aquaculture. To seek safe and effective prevention measures, a Bacillus subtilis GC5 surface displayed vaccine was prepared and applied orally in tilapia. The study first showed that recombinant spores can engraft in the tilapia intestine. Then, the effect of protection and the immune responses were evaluated. The results of ELISA showed that Sip-specific antibody in the sera of GC5-Sip-immunized fish can be detected after the first oral administration when compared to the phosphate buffer saline (PBS) control group, and the levels of specific IgM gradually strengthened with boosting, so does the specific antibody against bacteria, proving that humoral immunity was induced. Quantitative real-time PCR (qRT-PCR) results showed that the immune-related gene expression of the gut and spleen exhibited a different rising trend in the GC5-Sip group, revealing that innate immune response and local as well as systemic cellular immunity were induced. The outcome of fish immunized with GC5-Sip spores provided a relative percent survival (RPS) of 41.7% against S. agalactiae and GC5 group had an RPS of 24.2%, indicating that GC5-Sip was safe and effective in protecting tilapia against bacterial infection. Our study demonstrated that the oral administration of B. subtilis spores expressing Sip could cause an effective immune response and offer good resistance to bacterial infection. Our work may lead to the development of new ideas for immunoprophylaxis against S. agalactiae infection.
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Affiliation(s)
- Yuan-Yuan Yao
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Dan-Dan Chen
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zheng-Wei Cui
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xiang-Yang Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yuan-Yuan Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xia Guo
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Ai-Hua Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, China.
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; State Key Laboratory of Aquaculture Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China.
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34
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Li W, Li Y, Hu YZ, Mo XB, Xu GH, Xie LW, Li AX. GroEL, a novel vaccine candidate of piscine Streptococcus agalactiae identified by immunoproteome. Fish Shellfish Immunol 2019; 84:377-383. [PMID: 30308296 DOI: 10.1016/j.fsi.2018.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/05/2018] [Accepted: 10/07/2018] [Indexed: 06/08/2023]
Abstract
Streptococcus agalactiae is the major etiological agent of streptococcosis, which is responsible for huge economic losses in fishery, particularly in tilapia (Oreochromis niloticus) aquaculture. A research priority to control streptococcosis is to develop vaccines, so we sought to figure out the immunogenic proteins of S. agalactiae and screen the vaccine candidates for streptococcosis in the present study. Immunoproteomics, a technique involving two-dimensional gel electrophoresis (2-DE) followed by immunoblotting and mass spectrometry (MS), was employed to investigate the immunogenic proteins of S. agalactiae THN0901. Whole-cell soluble proteins were separated using 2-DE, and the immunogenic proteins were detected by western blotting using rabbit anti-S. agalactiae sera. A total of 17 immunoreactive spots on the soluble protein profile, corresponding to 15 different proteins, were identified by MALDI-TOF/TOF MS. Among the immunogenic proteins, GroEL attracted our attention as it was demonstrated to be immunogenic and protective against other streptococci. Nevertheless, to date, there have been no published reports on the immunogenicity and protective efficacy of GroEL against piscine S. agalactiae. Therefore, recombinant GroEL (rGroEL) was expressed in Escherichia coli BL21 (DE3) and purified by affinity chromatography. Immunization of tilapia with rGroEL resulted in an increase in antibody titers and conferred protection against S. agalactiae, with the relative percentage survival of 68.61 ± 7.39%. The immunoproteome in the present study narrows the scope of vaccine candidates, and the evaluation of GroEL immunogenicity and protective efficacy shows that GroEL forms an ideal candidate molecule in subunit vaccine against S. agalactiae.
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Affiliation(s)
- Wei Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals, The School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, PR China; State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, 510070, Guangdong Province, PR China
| | - Yun Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals, The School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, PR China
| | - Ya-Zhou Hu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals, The School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, PR China
| | - Xu-Bing Mo
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals, The School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, PR China
| | - Guo-Huan Xu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, 510070, Guangdong Province, PR China
| | - Li-Wei Xie
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, 510070, Guangdong Province, PR China
| | - An-Xing Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals, The School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, 510275, Guangdong Province, PR China.
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Wei X, Li B, Wu L, Yin X, Zhong X, Li Y, Wang Y, Guo Z, Ye J. Interleukin-6 gets involved in response to bacterial infection and promotes antibody production in Nile tilapia (Oreochromis niloticus). Dev Comp Immunol 2018; 89:141-151. [PMID: 30142358 DOI: 10.1016/j.dci.2018.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/16/2018] [Accepted: 08/16/2018] [Indexed: 06/08/2023]
Abstract
Interleukin 6 (IL-6), a pleiotropic cytokine, plays an important role in humoral immune response, not only inducing the differentiation of B cells into plasma cells, but also promoting antibody-secreting cells (ASCs) to produce antibodies. In this study, Nile tilapia (Oreochromis niloticus) IL-6 (OnIL-6) was identified and characterized at expression level in response to bacterial infection and promotion of antibody production. The open reading frame of OnIL-6 ORF is consisted of 663 bp encoding a polypeptide of 220 amino acids. The deduced OnIL-6 protein contained an IL-6/G-CSF family signature, two conserved cysteine, and four α-helix bundles, which was highly homologous to other species. Spatial mRNA expression analysis revealed that the highest expression of OnIL-6 was observed in the thymus. After in vivo challenges of lipopolysaccharide (LPS) and Streptococcus agalactia (S. agalactiae), OnIL-6 expressions were significantly up-regulated in head kidney and spleen. The similar up-regulation of OnIL-6 was observed in the head kidney and spleen leukocytes in vitro stimulation with LPS and S. agalactiae. In addition, inducement with the recombinant OnIL-6 ((r)OnIL-6) in vitro caused significant increases in expressions of both sIgM and mIgM. Moreover, the (r)OnIL-6 stimulation enhanced the secretion of sIgM (more especially in P50 plasma-like B cells) and the production of mIgM in P60 and P70 B cell subsets (resting B cells, activated B cells and plasmablast-like B cells) in vitro. Taken together, this study indicated that OnIL-6 might be involved in host defense against bacterial infection and promote the production of antibody in Nile tilapia.
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Affiliation(s)
- Xiufang Wei
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Bingxi Li
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Liting Wu
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Xiaoxue Yin
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Xiaofang Zhong
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Yuan Li
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Yuhong Wang
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Zheng Guo
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Jianmin Ye
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China.
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Wang J, He RZ, Lu GL, Luo HL, Lu DQ, Li AX. Vaccine-induced antibody level as the parameter of the influence of environmental salinity on vaccine efficacy in Nile tilapia. Fish Shellfish Immunol 2018; 82:522-530. [PMID: 30118846 DOI: 10.1016/j.fsi.2018.08.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/12/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
To effectively increase production and improve economic returns, the co-culture of Nile tilapia (Oreochromis niloticus) and marine shrimp has been adopted in many countries, including China. Although O. niloticus is an euryhaline fish that can tolerate elevated salinities and even full-strength seawater, fluctuations in salinity levels can undoubtedly induce stress and affect the immune response of this fish. Therefore, this study assessed the impact of salinity on vaccine efficacy in Nile tilapia, which used serum antibody level as a surrogate marker to detect vaccine efficacy. Nile tilapia were acclimatized to 0, 10, 20, or 30 ppt salinity, and then immunized with a formalin-inactivated Streptococcus agalactiae vaccine. Significantly lower levels of antibody in vaccinated fish were found at 20 and 30 ppt salinity compared to 0 and 10 ppt salinity. White blood cell counts, absolute blood lymphocyte counts, and serum bactericidal activity levels were all significantly lower in vaccinated fish at 20 and 30 ppt salinity. Elevated cortisol levels were detected in all of the fish exposure to salinity. Concentrations of serum electrolytes (Na+ and Cl-) were significantly higher in fish at 30 ppt salinity, as compared to fish at lower salinities. Furthermore, the mRNA transcription levels of three of the immune-related genes analyzed (IgM, IL-1β, and IFN-γ, but not Hsp70) were significantly inhibited in the vaccinated fish at 20 and 30 ppt salinity. A suppressed immune response and decreased vaccine efficacy were also indicated by the lower survival rate of vaccinated fish at 20 ppt salinity when challenged with S. agalactiae. Therefore, salinities ≥20 ppt negatively affected antibody production in Nile tilapia, ultimately affecting vaccine efficacy.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Run-Zhen He
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Ge-Ling Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Heng-Li Luo
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Dan-Qi Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China.
| | - An-Xing Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory of Improved Variety Reproduction in Aquatic Economic Animals and Institute of Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, Shandong Province, PR China.
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Dobrut A, Brzozowska E, Górska S, Pyclik M, Gamian A, Bulanda M, Majewska E, Brzychczy-Włoch M. Epitopes of Immunoreactive Proteins of Streptococcus Agalactiae: Enolase, Inosine 5'-Monophosphate Dehydrogenase and Molecular Chaperone GroEL. Front Cell Infect Microbiol 2018; 8:349. [PMID: 30333963 PMCID: PMC6176014 DOI: 10.3389/fcimb.2018.00349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 09/11/2018] [Indexed: 11/13/2022] Open
Abstract
Three Streptococcus agalactiae (group B streptococci, GBS) immunoreactive proteins: enolase (47.4 kDa), inosine 5'-monophosphate dehydrogenase (IMPDH) (53 kDa) and molecular chaperone GroEL (57 kDa) were subjected to investigation. Enolase protein was described in our previous paper, whereas IMPDH and GroEL were presented for the first time. The aim of our paper was to provide mapping of specific epitopes, highly reactive with umbilical cord blood serum. Bioinformatic analyses allowed to select 32 most likely epitopes for enolase, 36 peptides for IMPDH and 41 immunoreactive peptides for molecular chaperone GroEL, which were synthesized by PEPSCAN. Ten peptides: two in enolase, one in IMPDH and seven in molecular chaperone GroEL have been identified as potentially highly selective epitopes that can be used as markers in rapid immunological diagnostic tests or constitute a component of an innovative vaccine against GBS infections.
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Affiliation(s)
- Anna Dobrut
- Department of Molecular Medical Microbiology, Chair of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Ewa Brzozowska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Sabina Górska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Marcelina Pyclik
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Andrzej Gamian
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Małgorzata Bulanda
- Department of Molecular Medical Microbiology, Chair of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Elzbieta Majewska
- Department of Clinical Obstetrics and Perinatology, University Hospital, Krakow, Poland
| | - Monika Brzychczy-Włoch
- Department of Molecular Medical Microbiology, Chair of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
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Wang Q, Wang X, Wang X, Feng R, Luo Q, Huang J. Generation of a novel Streptococcus agalactiae ghost vaccine and examination of its immunogenicity against virulent challenge in tilapia. Fish Shellfish Immunol 2018; 81:49-56. [PMID: 29969706 DOI: 10.1016/j.fsi.2018.06.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/20/2018] [Accepted: 06/30/2018] [Indexed: 06/08/2023]
Abstract
Streptococcus agalactiae (S. agalactiae) is a gram-positive pathogen that causes a wide range of infections in fish and other animals including humans. Bacterial ghosts (BGs) are nonliving, empty cell envelopes and are well represented as novel vaccine candidates. In this study, we examined the immunogenicity and protective efficacy of S. agalactiae ghosts (SAG) against a virulent challenge in tilapia. Nonliving SAG was generated by a culture with Penicillin and Streptolysin, and then treated with the MIC of sodium hydroxide. The formation of a transmembrane lysis tunnel structure in SAG was visualized by electron microscopy. To investigate the SAG as a vaccine candidate, fish were divided into three groups, A (SAG immunized), B [Formalin-inactivated S. agalactiae (FSA) immunized] and C (phosphate-buffered saline, PBS-immunized control). The IgM antibody responses were significantly stronger in the SAG-immunized group than in FSA-immunized group, which was higher than in the non-immunized control group (P < 0.05). Moreover, phagocytic activity (percent phagocytes, PP) was significantly higher (p < 0.05) in the SAG-immunized group than in FSA-immunized group, which was higher than in the non-immunized control group (P < 0.05). In addition, non-specific immune immunity, such as lysozyme and superoxide dismutase activities, in the SAG-immunized fish showed significantly higher activities than FSA-immunized fish and the control group fish (P < 0.05). Also, fish immunized with SAG and FSA showed significantly higher (p < 0.05) gene expression of IL-1β, TNF-α, IFN-γ and TGF-β in the head kidney and spleen than fish treated with PBS during the whole observed period. In addition, fish immunized with SAG showed significantly higher gene expression of L-1β, TNF-α, and TGF-β in the spleen than in the FSA-immunized fish. Although there was no significant (P > 0.05) difference of survival rate (SR) or relative percent survival (RPS) between SAG and FSA immunized groups, they were all significantly more protected against the S. agalactiae challenge (SR: 86.67%, RPS: 76.395) and (SR: 80.00%, RPS: 67.50%) respectively, compared to the PBS-treated group (SR: 33.33%). These results suggest that immunization with SAG induces immune responses and provides protection against a virulent S. agalactiae challenge.
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Affiliation(s)
- Qishuo Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Huaian research center, Institute of Hydrobiology, Chinese Academy of Sciences, Huaian 223000, PR China
| | - Xuepeng Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 272000, PR China.
| | - Xuemei Wang
- Shandong Yisheng Livestock Veterinary Science Institute, 264000, Yantai, PR China
| | - Ruijuan Feng
- Jiangsu Tianshen Co., Ltd., 223000, Huai'an, PR China
| | - Qian Luo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
| | - Jinjing Huang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention & Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, 271018, PR China
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Chen M, Ding M, Li Y, Zhong X, Liu S, Guo Z, Yin X, Fu S, Ye J. The complement component 1 q (C1q) in Nile tilapia (Oreochromis niloticus): Functional characterization in host defense against bacterial infection and effect on cytokine response in macrophages. Dev Comp Immunol 2018; 87:98-108. [PMID: 29890197 DOI: 10.1016/j.dci.2018.05.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 05/31/2018] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
Complement component 1q (C1q) is the initial protein of the classical complement pathway and plays an important role in immune response against bacterial infection. In this study, the full-length of C1q subcomponent A, B and C chain genes (C1qA, C1qB and C1qC) were identified and characterized from Nile tilapia (Oreochromis niloticus). Molecular characterization of these three C1q subcomponents (OnC1qs) harbored conserved amino acids through analyses of multiple sequence alignment and phylogenetic tree, which were homologous to other teleost species. Expression analysis revealed that the OnC1qs were highly expressed in liver. After the in vivo challenges of Streptococcus agalactiae and LPS, the mRNA expressions of OnC1qs were significantly up-regulated in liver. Meanwhile, the concentration variation of OnC1qs at the protein level from tilapia serum after challenge with S. agalactiae were measured by a competitive-inhibition ELISA. In addition, the up-regulation expressions of OnC1qs were also demonstrated in head kidney adherent leukocytes and the cell culture medium in vitro stimulation with S. agalactiae, Aeromonas hydrophila and LPS, respectively. Moreover, the recombinant OnC1qs enhanced expression of cytokines IL-6, IL-8 and IL-10 in head kidney adherent leukocytes, and were able to bind both heat-aggregated mouse IgG and IgM. Taken together, the results of this study indicated that OnC1qs might be involved in host defense against bacterial infection in Nile tilapia.
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Affiliation(s)
- Meng Chen
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Mingmei Ding
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Yuan Li
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Xiaofang Zhong
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Shuo Liu
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Zheng Guo
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Xiaoxue Yin
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Shengli Fu
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China
| | - Jianmin Ye
- Guangdong Provincial Key Laboratory for Health and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong, 510631, PR China.
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Wang Z, Huang Y, Li Y, Wang B, Lu Y, Xia L, Tang J, Jian J. Biological characterization, expression, and functional analysis of tumor necrosis factor receptor-associated factor 6 in Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2018; 80:497-504. [PMID: 29933111 DOI: 10.1016/j.fsi.2018.06.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/13/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
Nile tilapia (Oreochromis niloticus) is a pivotal economic fish that has been plagued by Streptococcus agalactiae infections for many years. Tumor necrosis factor receptor-associated factor 6 (TRAF6) is a crucial adaptor molecule of the interleukin-1 receptor/Toll-like receptor (IL-1/TLR) superfamily, which can trigger downstream signaling cascades involved in innate immunity. In this study, the full-length cDNA of TRAF6 was cloned from O. niloticus (named On-TRAF6), which has an open reading frame of 1716 bp, and encode a polypeptide of 571 amino acids. The predicted amino acid sequence of On-TRAF6 contained the characteristic motifs of TRAF proteins, including a Zinc finger of RING-type, two Zinc fingers of TRAF-type, and a MATH (meprin and TRAF homology) domain. Multiple sequence alignment revealed that On-TRAF6 shares a relatively high level of identity with those of other fishes (64-98%). In healthy tilapia, mRNA expression of On-TRAF6 could be detected in all the examined tissues and the highest expression occurred in the spleen. Moreover, we found that On-TRAF6 was involved immune response of Nile tilapia following the stimulation with Streptococcus agalactiae and polyinosinic: polycytidylic acid (Poly I:C) when determined by using qPCR. The result of subcellular localization showed that On-TRAF6 distributed in the cytoplasm, and over-expression of On-TRAF6 could strongly activated NF-кB pathway in HEK293T cells. These findings indicated that On-TRAF6 may play an important role in the immune response to intracellular bacteria in Nile tilapia.
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Affiliation(s)
- Zhiwen Wang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - Yu Huang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - Yuan Li
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - Bei Wang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - Yishan Lu
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China.
| | - Liqun Xia
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - Jufen Tang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
| | - JiChang Jian
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524025, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524025, China; Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, 524025, China
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Wang J, Lu DQ, Jiang B, Luo HL, Lu GL, Li AX. The effect of intermittent hypoxia under different temperature on the immunomodulation in Streptococcus agalactiae vaccinated Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol 2018; 79:181-192. [PMID: 29684601 DOI: 10.1016/j.fsi.2018.04.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/16/2018] [Accepted: 04/19/2018] [Indexed: 06/08/2023]
Abstract
Dissolved oxygen (DO) and temperature are the potential immunomodulators in fish and play the important roles in regulating immunity. We studied the effect of intermittent hypoxia under different temperature on the immunomodulation in vaccinated Nile tilapia (Oreochromis niloticus). The expression of immune-related genes, enzymatic activities, histology, cumulative mortality, and S. agalactiae clearance were assessed. Study conditions were intermittently hypoxic (4.0 ± 1.0 mg/L DO) at 30 ± 0.5 °C or 35 ± 0.5 °C. Interleukin-1beta (IL-1β), tumor necrosis factor alpha (TNF-α) and gamma interferon (IFN-γ) mRNA expression in spleen and head kidney were significantly lower in vaccinated hypoxic fish compared to the vaccinated normoxic fish. Levels of heat shock protein 70 (HSP70) in tissues showed an opposite tendency. Superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities were significantly lower in vaccinated hypoxic fish. Malondialdehyde levels were significantly greater under hypoxic conditions. In vitro studies evaluated the effects of intermittent hypoxia at different temperatures on cells of vaccinated O. niloticus. Phagocytic activity of peripheral blood leucocytes (PBLs) and intracellular reactive oxygen species (ROS) production in head kidney cells were significantly decreased by intermittent hypoxia at either 30 °C or 35 °C, while nitric oxide levels in tissues cells increased significantly under hypoxic conditions. These changes were well reflected by the further suppression modulation on S. agalactiae clearance in vaccinated O. niloticus and higher cumulative mortality by intermittent hypoxia. Taken together, intermittent hypoxia at either 30 °C or 35 °C could suppress immunomodulation in vaccinated Nile tilapia.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Dan-Qi Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Biao Jiang
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Heng-Li Luo
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - Ge-Ling Lu
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China
| | - An-Xing Li
- State Key Laboratory of Biocontrol/Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, Shandong Province, PR China.
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Mu L, Yin X, Xiao Y, Bian X, Yang Y, Wu L, Ye J. A C-type lectin (CL11X1-like) from Nile tilapia (Oreochromis niloticus) is involved in host defense against bacterial infection. Dev Comp Immunol 2018; 84:230-240. [PMID: 29481905 DOI: 10.1016/j.dci.2018.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 02/15/2018] [Indexed: 06/08/2023]
Abstract
Collectins, a subfamily of the C-type lectins, are able to bind non-self glycoconjugates on the surface of microorganisms and inhibit infection by direct neutralization, agglutination and/or opsonization, which play important roles in innate immunity. In this study, a CL11X1-like collectin (OnCL11X1) was identified from Nile tilapia (Oreochromis niloticus) and characterized at expression and agglutination functional levels. The open reading frame of OnCL11X1 is 840 bp of nucleotide sequence encoding polypeptides of 279 amino acids. The deduced amino acid sequence is highly homology to teleost and similar to mammalian CL11X1, containing a canonical collagen-like region, a carbohydrate recognition domain and a neck region. Expression analysis revealed that the OnCL11X1 was highly expressed in the liver, and widely exhibited in other tissues including kidney, intestines and spleen. In addition, the OnCL11X1 expression was significantly up-regulated in spleen and anterior kidney following challenges with a Gram-positive bacterial pathogen (Streptococcus agalactiae) and a Gram-negative bacterial pathogen (Aeromonas hydrophila). The up-regulation of OnCL11X1 expression was also demonstrated in hepatocytes and macrophages in vitro stimulation with S. agalactiae and A. hydrophila. Recombinant OnCL11X1 protein was able to agglutinate both S. agalactiae and A. hydrophila in vitro and promote the phagocytosis by macrophages. Taken together, the results of this study indicated that OnCL11X1, possessing apparent agglutination and opsonization ability to bacterial pathogens, might be involved in host defense against bacterial infection in Nile tilapia.
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Affiliation(s)
- Liangliang Mu
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Xiaoxue Yin
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Yanhui Xiao
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Xia Bian
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Yanjian Yang
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Liting Wu
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China
| | - Jianmin Ye
- Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, College of Life Sciences, South China Normal University, Guangdong 510631, PR China.
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Gupalova T, Leontieva G, Kramskaya T, Grabovskaya K, Bormotova E, Korjevski D, Suvorov A. Development of experimental GBS vaccine for mucosal immunization. PLoS One 2018; 13:e0196564. [PMID: 29727446 PMCID: PMC5935385 DOI: 10.1371/journal.pone.0196564] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 09/06/2017] [Accepted: 04/16/2018] [Indexed: 12/17/2022] Open
Abstract
Streptococcus agalactiae, or group B streptococcus (GBS), is an important pathogen as it is the leading cause of neonatal deaths due to sepsis, meningitis or bacterial pneumonia. Although the development of an effective and safe GBS vaccine is on the agenda of many research labs, there is no GBS vaccine on the market yet. In the present study we attempted to engineer a live vaccine strain based on Bac, a surface protein of GBS, incorporated into a surface fimbrial protein of probiotic Enterococcus. The resulting strain induced specific systemic and local immune responses in mice and provided protection against GBS when administered via the intranasal, oral or intravaginal immunization routes.
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MESH Headings
- Administration, Intranasal
- Administration, Intravaginal
- Administration, Oral
- Animals
- Antibodies, Bacterial/biosynthesis
- Antibodies, Bacterial/blood
- Bacterial Load
- Bacterial Proteins/genetics
- Bacterial Proteins/immunology
- Enterococcus faecium/genetics
- Enterococcus faecium/immunology
- Female
- Fimbriae Proteins/genetics
- Fimbriae Proteins/immunology
- Immunity, Mucosal
- Mice
- Probiotics
- Streptococcal Infections/immunology
- Streptococcal Infections/microbiology
- Streptococcal Infections/prevention & control
- Streptococcal Vaccines/administration & dosage
- Streptococcal Vaccines/genetics
- Streptococcal Vaccines/immunology
- Streptococcus agalactiae/genetics
- Streptococcus agalactiae/immunology
- Streptococcus agalactiae/pathogenicity
- Vaccines, Conjugate/administration & dosage
- Vaccines, Conjugate/genetics
- Vaccines, Conjugate/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
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Affiliation(s)
- T. Gupalova
- Institute of Experimental Medicine, Saint-Petersburg, Russia
| | - G. Leontieva
- Institute of Experimental Medicine, Saint-Petersburg, Russia
- * E-mail:
| | - T. Kramskaya
- Institute of Experimental Medicine, Saint-Petersburg, Russia
| | - K. Grabovskaya
- Institute of Experimental Medicine, Saint-Petersburg, Russia
| | - E. Bormotova
- Institute of Experimental Medicine, Saint-Petersburg, Russia
| | - D. Korjevski
- Institute of Experimental Medicine, Saint-Petersburg, Russia
| | - A. Suvorov
- Institute of Experimental Medicine, Saint-Petersburg, Russia
- Saint Petersburg State University, Saint-Petersburg, Russia
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Lee H. Importance of Functional Assessment of Immunity against Group B Streptococcus. J Korean Med Sci 2018; 33:e129. [PMID: 29651822 PMCID: PMC5897160 DOI: 10.3346/jkms.2018.33.e129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hyunju Lee
- Department of Pediatrics, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongam, Korea.
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45
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Bowater RO, Dennis MM, Blyde D, Stone B, Barnes AC, Delamare-Deboutteville J, Horton MA, White M, Condon K, Jones R. Epizootics of Streptococcus agalactiae infection in captive rays from Queensland, Australia. J Fish Dis 2018; 41:223-232. [PMID: 28836670 DOI: 10.1111/jfd.12701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/14/2017] [Accepted: 07/23/2017] [Indexed: 06/07/2023]
Abstract
The aim of this study was to describe two epizootics of high mortalities from infection with Streptococcus agalactiae, occurring in captive rays held in a marine display aquarium in south-east Queensland, Australia, in 2009 and 2010. Five different species of rays were affected, including mangrove whiprays (Himantura granulata), estuary rays (Dasyatis fluviorum), eastern shovelnose rays (Aptychotrema rostrata), white-spotted eagle rays (Aetobatus narinari) and blue-spotted mask rays (Neotrygon kuhlii). This report describes the history of both epizootics including collection, quarantine and husbandry of rays, the disease epizootics, clinico-pathological features of the disease, antimicrobial therapy, autogenous vaccine production, and laboratory studies including clinical and histopathology, bacteriology, PCR, molecular serotyping and sequencing of the bacterium S. agalactiae.
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Affiliation(s)
- R O Bowater
- Department of Agriculture & Fisheries, Biosecurity Queensland, Townsville, QLD, Australia
| | - M M Dennis
- Ross University School of Veterinary Medicine, Basseterre, St. Kitts and Nevis
| | - D Blyde
- Sea World, Surfers Paradise, QLD, Australia
| | - B Stone
- QML Vetnostics, Brisbane, QLD, Australia
| | - A C Barnes
- School of Biological Sciences and Centre for Marine Science, The University of Queensland, Brisbane, QLD, Australia
| | - J Delamare-Deboutteville
- School of Biological Sciences and Centre for Marine Science, The University of Queensland, Brisbane, QLD, Australia
| | - M A Horton
- Sea World, Surfers Paradise, QLD, Australia
| | - M White
- Treidlia Biovet Pty Ltd, Seven Hills, NSW, Australia
| | - K Condon
- College of Public Health & Veterinary Sciences, James Cook University, Townsville, QLD, Australia
| | - R Jones
- The Aquarium Vet, Moorabbin, VIC, Australia
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Edwards MS, Rench MA, Rinaudo CD, Fabbrini M, Tuscano G, Buffi G, Bartolini E, Bonacci S, Baker CJ, Margarit I. Immune Responses to Invasive Group B Streptococcal Disease in Adults. Emerg Infect Dis 2018; 22:1877-1883. [PMID: 27767008 PMCID: PMC5088039 DOI: 10.3201/eid2211.160914] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Antibodies to capsular polysaccharides and pilus proteins develop in recovering adults. Immunization of nonpregnant adults could help prevent invasive group B Streptococcus (GBS) infections, but adult immune responses have not been investigated. We defined capsular polysaccharide (CPS) and pilus island (PI) surface antigen distribution and expression and immune responses to GBS infection in nonpregnant adults. Prospective surveillance from 7 hospitals in Houston, Texas, USA, identified 102 adults with GBS bacteremia; 43% had skin/soft tissue infection, 16% bacteremia without focus, and 12% osteomyelitis. CPS-specific IgG was determined by ELISA and pilus-specific IgG by multiplex immunoassay. CPS types were Ia (24.5%), Ib (12.7%), II (9.8%), III (16.7%), IV (13.7%), and V (12.7%); 9.8% were nontypeable by serologic methods. Pili, expressed by 89%, were most often PI-2a. CPS and pilus-specific IgG increased during convalescence among patients with strains expressing CPS or PI. All GBS expressed CPS or PI; 79% expressed both. Increased antibodies to CPS and PI during recovery suggests that GBS bacteremia in adults is potentially vaccine preventable.
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47
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Baldissera MD, Souza CF, Doleski PH, Moreira KLS, da Veiga ML, da Rocha MIUM, Santos RCV, Baldisserotto B. Involvement of cholinergic and adenosinergic systems on the branchial immune response of experimentally infected silver catfish with Streptococcus agalactiae. J Fish Dis 2018; 41:27-32. [PMID: 28699699 DOI: 10.1111/jfd.12665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 05/07/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
It has been recognized that the cholinergic and adenosinergic systems have an essential role in immune and inflammatory responses during bacterial fish pathogens, such as the enzymes acetylcholinesterase (AChE) and adenosine deaminase (ADA), which are responsible for catalysis of the anti-inflammatory molecules acetylcholine (ACh) and adenosine (Ado) respectively. Thus, the aim of this study was to investigate the involvement of the cholinergic and adenosinergic systems on the immune response and inflammatory process in gills of experimentally infected Rhamdia quelen with Streptococcus agalactiae. Acetylcholinesterase activity decreased, while ACh levels increased in gills of infected animals compared to uninfected animals. On the other hand, a significant increase in ADA activity with a concomitant decrease in Ado levels was observed in infected animals compared to uninfected animals. Based on this evidence, we concluded that infection by S. agalactiae in silver catfish alters the cholinergic and adenosinergic systems, suggesting the involvement of AChE and ADA activities on immune and inflammatory responses, regulating the ACh and Ado levels. In summary, the downregulation of AChE activity exerts an anti-inflammatory profile in an attempt to reduce or prevent the tissue damage, while the upregulation of ADA activity exerts a pro-inflammatory profile, contributing to disease pathophysiology.
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Affiliation(s)
- M D Baldissera
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - C F Souza
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - P H Doleski
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - K L S Moreira
- Department of Morphology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - M L da Veiga
- Department of Morphology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - M I U M da Rocha
- Department of Morphology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - R C V Santos
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - B Baldisserotto
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, Brazil
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Russell LB, Kim SY, Cosgriff B, Pentakota SR, Schrag SJ, Sobanjo-Ter Meulen A, Verani JR, Sinha A. Cost-effectiveness of maternal GBS immunization in low-income sub-Saharan Africa. Vaccine 2017; 35:6905-6914. [PMID: 29129451 PMCID: PMC5723707 DOI: 10.1016/j.vaccine.2017.07.108] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [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: 05/23/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 01/16/2023]
Abstract
BACKGROUND A maternal group B streptococcal (GBS) vaccine could prevent neonatal sepsis and meningitis. Its cost-effectiveness in low-income sub-Saharan Africa, a high burden region, is unknown. METHODS We used a decision tree model, with Markov nodes to project infants' lifetimes, to compare maternal immunization delivered through routine antenatal care with no immunization. 37 countries were clustered on the basis of economic and health resources and past public health performance. Vaccine efficacy for covered serotypes was ranged from 50% to 90%. The model projected EOGBS (early-onset) and LOGBS (late-onset) cases and deaths, disability-adjusted life years (DALYs), healthcare costs (2014 US$), and cost-effectiveness for a representative country in each of the four clusters: Guinea-Bissau, Uganda, Nigeria, and Ghana. Maximum vaccination costs/dose were estimated to meet two cost-effectiveness benchmarks, 0.5 GDP and GDP per capita/DALY, for ranges of disease incidence (reported and adjusted for under-reporting) and vaccine efficacy. RESULTS At coverage equal to the proportion of pregnant women with≥4 antenatal visits (ANC4) and serotype-specific vaccine efficacy of 70%, maternal GBS immunization would prevent one-third of GBS cases and deaths in Uganda and Nigeria, where ANC4 is 50%, 42-43% in Guinea-Bissau (ANC4=65%), and 55-57% in Ghana (ANC4=87%). At a vaccination cost of $7/dose, maternal immunization would cost $320-$350/DALY averted in Guinea-Bissau, Nigeria, and Ghana, less than half these countries' GDP per capita. In Uganda, which has the lowest case fatality ratios, the cost would be $573/DALY. If the vaccine prevents a small proportion of stillbirths, it would be even more cost-effective. Vaccination cost/dose, disease incidence, and case fatality were key drivers of cost/DALY in sensitivity analyses. CONCLUSION Maternal GBS immunization could be a cost-effective intervention in low-income sub-Saharan Africa, with cost-effectiveness ratios similar to other recently introduced vaccines. The vaccination cost at which introduction is cost-effective depends on disease incidence and vaccine efficacy. Clinical Trial registry name and registration number: Not applicable.
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Affiliation(s)
- Louise B Russell
- Institute for Health and Department of Economics, Rutgers University, New Brunswick, NJ, USA.
| | - Sun-Young Kim
- Department of Healthcare Management and Policy, School of Public Health, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
| | | | - Sri Ram Pentakota
- Department of Surgery, New Jersey Medical School, Rutgers University, Newark, NJ, USA.
| | - Stephanie J Schrag
- National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, USA.
| | | | - Jennifer R Verani
- National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, USA.
| | - Anushua Sinha
- Department of Health Systems and Policy, School of Public Health, Rutgers University, Piscataway, NJ, USA.
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49
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Zhu L, Yang Q, Huang L, Wang K, Wang X, Chen D, Geng Y, Huang X, Ouyang P, Lai W. Effectivity of oral recombinant DNA vaccine against Streptococcus agalactiae in Nile tilapia. Dev Comp Immunol 2017; 77:77-87. [PMID: 28757159 DOI: 10.1016/j.dci.2017.07.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/27/2017] [Accepted: 07/27/2017] [Indexed: 06/07/2023]
Abstract
The effects of oral vaccination by two immune routes (gavage and mixed fodder administration) using a recombinant DNA vaccine SL7207-pVAX1-sip against Streptococcus agalactiae were assessed. SL7207-pVAX1-sip significantly enhanced various innate immune responses of tilapia, such as total serum protein, superoxide dismutase activity, lysozyme activity, complement C3 concentration in serum, serum antibacterial activity, and interleukin 1β and tumor necrosis factor-α. Vaccinated fish had higher relative percent survival values (57% and 63% for gavage group and mix fodder administration, respectively) at 10 weeks after S. agalactiae infection. When administered mixed fodder, the DNA vaccine SL7207-pVAX1-sip against S. agalactiae may produce more effective protection. These findings can promote the application and development of DNA vaccines in aquaculture.
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Affiliation(s)
- Ling Zhu
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qian Yang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Lingyuan Huang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Chengdu LiLai Biotechnology Co., Ltd., Chengdu, Sichuan, China
| | - Kaiyu Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Xingli Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Defang Chen
- Department of Aquaculture, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Yi Geng
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Xiaoli Huang
- Department of Aquaculture, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Ping Ouyang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Weimin Lai
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
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50
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Puertas-Prieto A, Lara-Oya A, Liébana Martos C, Rodríguez-Granger J, Cobo F, Sampedro A, Padilla A, Gutiérrez-Fernández J, Manzanares-Galán S, Cueto-López M, Rosa-Fraile M, Navarro-Mari JM. Streptococcus agalactiae: prevention and vaccine development. Rev Esp Quimioter 2017; 30:312-318. [PMID: 28945063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Streptococcus agalactiae, group B Streptococcus (SGB), is the most important cause of morbi-mortality among newborn population, and an important pathogen among immunossupressed adult patients. Despite the advances in the treatment and prevention of neonatal infections as a consequence of implementation of national and international recommendations for prevention of infection, there are still some improvements for the final control of the disease. In this sense, the vaccination against SGB could be an effective measure for the prevention of disease in those cases where intrapartum prophylaxis is not useful and in adult patients with risk factors for invasive infection due to SGB. This review summarizes the efforts made until now in order to establish the control of the infection, and brings some information on the current state-of-the art of vaccines against SGB, in which different strategies in their design have been used.
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Affiliation(s)
| | | | | | - J Rodríguez-Granger
- Javier Rodríguez Granger, Servicio de Microbiología. Hospital Universitario Virgen de las Nieves. Avenida de las Fuerzas Armadas s/n C.P 18014 Granada, Spain.
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