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Téblick L, Lipovac M, Molenberghs F, Delputte P, De Vos WH, Vorsters A. HPV-specific antibodies in female genital tract secretions captured via first-void urine retain their neutralizing capacity. Hum Vaccin Immunother 2024; 20:2330168. [PMID: 38567541 PMCID: PMC10993920 DOI: 10.1080/21645515.2024.2330168] [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: 02/15/2024] [Accepted: 03/11/2024] [Indexed: 04/04/2024] Open
Abstract
Human papillomavirus (HPV) vaccines, primarily relying on neutralizing antibodies, have proven highly effective. Recently, HPV-specific antibodies have been detected in the female genital tract secretions captured by first-void urine (FVU), offering a minimally invasive diagnostic approach. In this study, we investigated whether HPV16-specific antibodies present in FVU samples retain their neutralizing capacity by using pseudovirion-based neutralization assays. Paired FVU and serum samples (vaccinated n = 25, unvaccinated n = 25, aged 18-25) were analyzed using two orthogonal pseudovirion-based neutralization assays, one using fluorescence microscopy and the other using luminescence-based spectrophotometry. Results were compared with HPV16-specific IgG concentrations and correlations between neutralizing antibodies in FVU and serum were explored. The study demonstrated the presence of neutralizing antibodies in FVU using both pseudovirion-based neutralization assays, with the luminescence-based assay showing higher sensitivity for FVU samples, while the fluorescence microscopy-based assay exhibited better specificity for serum and overall higher reproducibility. High Spearman correlation values were calculated between HPV16-IgG and HPV16-neutralizing antibodies for both protocols (rs: 0.54-0.94, p < .001). Significant Spearman correlations between FVU and serum concentrations were also established for all assays (rs: 0.44-0.91, p < .01). This study demonstrates the continued neutralizing ability of antibodies captured with FVU, supporting the hypothesis that HPV vaccination may reduce autoinoculation and transmission risk to the sexual partner. Although further protocol optimizations are warranted, these findings provide a foundation for future research and larger cohort studies that could have implications for the optimal design, evaluation, and implementation of HPV vaccination programs.
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Affiliation(s)
- Laura Téblick
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Marijana Lipovac
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Freya Molenberghs
- Laboratory of Cell Biology and Histology, University of Antwerp, Antwerp, Belgium
| | - Peter Delputte
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp, Belgium
| | - Winnok H. De Vos
- Laboratory of Cell Biology and Histology, University of Antwerp, Antwerp, Belgium
- Antwerp Centre for Advanced Microscopy, University of Antwerp, Antwerp, Belgium
- µNEURO Centre of Research Excellence, University of Antwerp, Antwerp, Belgium
| | - Alex Vorsters
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
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Lee J, Naoe Y, Bang U, Nakagama Y, Saito A, Kido Y, Hotta A. Neutralization sensitivity of SARS-CoV-2 Omicron variants FL.1 and GE.1 by therapeutic antibodies and XBB sera. Virology 2024; 595:110067. [PMID: 38653156 DOI: 10.1016/j.virol.2024.110067] [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: 05/18/2023] [Revised: 02/22/2024] [Accepted: 03/21/2024] [Indexed: 04/25/2024]
Abstract
Two SARS-CoV-2 XBB sub-variants, FL.1 and GE.1, have been increasing in prevalence worldwide, but limited information is available about their ability to evade the immune system. FL.1 and GE.1 are emerging Omicron XBB variants possessing additional mutations in the spike RBD raising concerns of increased neutralization escape. In this study, we assessed the neutralizing ability of eleven FDA-approved monoclonal antibody combinations against different Omicron variants, including BA.2.75, BA.2.76, BA.4/5, XBB.1.5, and CH.1.1. Among the eleven antibodies, Sotrovimab was the only antibody to show broad neutralization ability against XBB.1.5. However, Sotrovimab showed attenuated neutralization efficiency against recently emerging XBB sub-lineages EG.5, FL.1, and GE.1 compared to XBB.1.5. Additionally, XBB.1.5 seropositive convalescent sera displayed lower neutralization activity against EG.5, FL.1, and GE.1. Overall, our findings present enhanced immune evasion capacity of emerging XBB variants and emphasize the importance of continued monitoring of novel variants.
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Affiliation(s)
- Joseph Lee
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan
| | - Youichi Naoe
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan
| | - Uikyu Bang
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan
| | - Yu Nakagama
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Akatsuki Saito
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, 889-2192, Japan; Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan; Center for Animal Disease Control, University of Miyazaki, Miyazaki, 889-2192, Japan
| | - Yasutoshi Kido
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Akitsu Hotta
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan.
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Wang G, Jiang N, Yu H, Niu X, Huang M, Zhang Y, Zhang W, Han J, Xu M, Liu R, Wu Z, Han J, Wang S, Gao L, Cui H, Zhang Y, Chen Y, Gao Y, Qi X. Loop P DE of viral capsid protein is involved in immune escape of the emerging novel variant infectious bursal disease virus. Vet Microbiol 2024; 293:110094. [PMID: 38636175 DOI: 10.1016/j.vetmic.2024.110094] [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: 02/27/2024] [Revised: 04/06/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
Infectious bursa disease (IBD) is an acute, highly contactable, lethal, immunosuppressive infectious disease caused by the Infectious bursa disease virus (IBDV). Currently, the emerged novel variant IBDV (nVarIBDV) and the sustainedly prevalent very virulent IBDV (vvIBDV) are the two most prevalent strains of IBDV in China. The antigenic properties of the two prevalent strains differed significantly, which led to the escape of nVarIBDV from the immune protection provided by the existing vvIBDV vaccine. However, the molecular basis of the nVarIBDV immune escape remains unclear. In this study, we demonstrated, for the first time, that residues 252, 254, and 256 in the PDE of VP2 are involved in the immune escape of the emerging nVarIBDV. Firstly, the IFA-mediated antigen-antibody affinity assay showed that PBC and PDE of VP2 could affect the affinity of vvIBDV antiserum to VP2, of which PDE was more significant. The key amino acids of PDE influencing the antigen-antibody affinity were also identified, with G254N being the most significant, followed by V252I and I256V. Then the mutated virus with point or combined mutations was rescued by reverse genetics. it was further demonstrated that mutations of V252I, G254N, and I256V in PDE could individually or collaboratively reduce antigen-antibody affinity and interfere with antiserum neutralization, with G254N being the most significant. This study revealed the reasons for the widespread prevalence of nVarIBDV in immunized chicken flocks and provided innovative ideas for designing novel vaccines that match the antigen of the epidemic strain.
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Affiliation(s)
- Guodong Wang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Nan Jiang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Hangbo Yu
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Xinxin Niu
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Mengmeng Huang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yulong Zhang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Wenying Zhang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Jinze Han
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Mengmeng Xu
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Runhang Liu
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Ziwen Wu
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Jingzhe Han
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Suyan Wang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Li Gao
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Hongyu Cui
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yanping Zhang
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yuntong Chen
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yulong Gao
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China.
| | - Xiaole Qi
- Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; World Organization for Animal Health (WOAH) Reference Laboratory for Infectious Bursal Disease, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China.
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Pasev M, Trifonova A, Velichkov A, Terzieva V. Duration of antibody response to the receptor binding domain of SARS-CoV-2 in infected or vaccinated individuals - A one year retrospective cohort study. Int Immunopharmacol 2024; 133:112084. [PMID: 38621337 DOI: 10.1016/j.intimp.2024.112084] [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: 11/21/2023] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 04/17/2024]
Abstract
The 2019 coronavirus (COVID-19) pandemic raised many scientific and medical questions. Of interest are the duration and effectiveness of the humoral immune response, especially since part of the pandemic occurred in the presence of anti-SARS-CoV-2 vaccines. We retrospectively studied 564 serum samples from 393 post-infected and vaccinated individuals to investigate the longevity and magnitude of the anti-spike IgG response. Our results showed that SARS-CoV-2 anti-spike IgG antibodies are retained for nine-twelve months, in both groups. In the vaccinated group we found higher IgG levels, but with a steeper decrease in titer over the study period. The recovered group's antibody levels correlated well with the national infection trendline for 2021. Both groups showed different, but distinct neutralizing capabilities towards RBD. The anti-Spike IgG response was sustained and efficient, independently of the triggering event, infection or vaccination, with the adaptive capacity against new viral variants being more valuable after infection.
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Affiliation(s)
- Martin Pasev
- Department of Clinical Microbiology and Virology, University Hospital Lozenetz, Sofia University "Sv. Kliment Ohridski", Sofia, Bulgaria
| | - Angelina Trifonova
- Department of Clinical Microbiology and Virology, University Hospital Lozenetz, Sofia University "Sv. Kliment Ohridski", Sofia, Bulgaria
| | - Andrey Velichkov
- Laboratory of Reproductive OMICs Technologies, Institute of Biology and Immunology of Reproduction "Acad. Kiril Bratanov", Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Velislava Terzieva
- Department of Clinical Microbiology and Virology, University Hospital Lozenetz, Sofia University "Sv. Kliment Ohridski", Sofia, Bulgaria; Laboratory of Reproductive OMICs Technologies, Institute of Biology and Immunology of Reproduction "Acad. Kiril Bratanov", Bulgarian Academy of Sciences, Sofia, Bulgaria.
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Müller-Kräuter H, Mezzacapo J, Klüver M, Baumgart S, Becker D, Fathi A, Pfeiffer S, Krähling V. Quantitative assay to analyze neutralization and inhibition of authentic Middle East respiratory syndrome coronavirus. Med Microbiol Immunol 2024; 213:6. [PMID: 38722338 PMCID: PMC11082005 DOI: 10.1007/s00430-024-00789-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 04/05/2024] [Indexed: 05/12/2024]
Abstract
To date, there is no licensed vaccine for Middle East respiratory syndrome coronavirus (MERS-CoV). Therefore, MERS-CoV is one of the diseases targeted by the Coalition for Epidemic Preparedness Innovations (CEPI) vaccine development programs and has been classified as a priority disease by the World Health Organization (WHO). An important measure of vaccine immunogenicity and antibody functionality is the detection of virus-neutralizing antibodies. We have developed and optimized a microneutralization assay (MNA) using authentic MERS-CoV and standardized automatic counting of virus foci. Compared to our standard virus neutralization assay, the MNA showed improved sensitivity when analyzing 30 human sera with good correlation of results (Spearman's correlation coefficient r = 0.8917, p value < 0.0001). It is important to use standardized materials, such as the WHO international standard (IS) for anti-MERS-CoV immunoglobulin G, to compare the results from clinical trials worldwide. Therefore, in addition to the neutralizing titers (NT50 = 1384, NT80 = 384), we determined the IC50 and IC80 of WHO IS in our MNA to be 0.67 IU/ml and 2.6 IU/ml, respectively. Overall, the established MNA is well suited to reliably quantify vaccine-induced neutralizing antibodies with high sensitivity.
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Affiliation(s)
- Helena Müller-Kräuter
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Jolanda Mezzacapo
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Michael Klüver
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
- German Center for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Marburg, Germany
| | - Sara Baumgart
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Dirk Becker
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
- German Center for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Marburg, Germany
| | - Anahita Fathi
- Institute for Infection Research and Vaccine Development, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany
| | - Sebastian Pfeiffer
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Verena Krähling
- Institute of Virology, Philipps University Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany.
- German Center for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Marburg, Germany.
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Abdollahnia A, Bahmani K, Aliahmadi A, As'habi MA, Ghassempour A. Mass spectrometric analysis of Odonthobuthus Doriae scorpion venom and its non-neutralized fractions after interaction with commercial antivenom. Sci Rep 2024; 14:10389. [PMID: 38710718 DOI: 10.1038/s41598-024-59150-z] [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: 12/17/2023] [Accepted: 04/08/2024] [Indexed: 05/08/2024] Open
Abstract
It is believed that antivenoms play a crucial role in neutralizing venoms. However, uncontrolled clinical effects appear in patients stung by scorpions after the injection of antivenom. In this research, non-neutralized components of the venom of the Iranian scorpion Odonthobuthus doriae were analyzed after interacting with the commercial antivenom available in the market. The venom and antivenom interaction was performed, then centrifuged, and the supernatant was analyzed by high-performance liquid chromatography (HPLC). Two peaks of Odonthobuthus doriae venom were observed in the chromatogram of the supernatant. Two components were isolated by HPLC and analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) instruments. Peptide sequencing was done by Liquid Chromatography Quadrupole Time-of-Flight Tandem Mass Spectrometry (LC-Q-TOF MS/MS). Results indicate that the components of scorpion venom mainly have a molecular weight below 10 kDa, consisting of toxic peptides that disrupt the function of sodium and potassium channels. The MALDI-TOF MS results show that two toxic peptides with molecular masses of 6941 Da and 6396 Da were not neutralized by the antivenom. According to the MS/MS sequencing data, the components have been related to peptides A0A5P8U2Q6_MESEU and A0A0U4FP89_ODODO, which belong to the sodium and potassium channels toxins family, respectively.
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Affiliation(s)
- Adel Abdollahnia
- Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C. Evin, Tehran, Iran
| | - Kiumars Bahmani
- Department of Pharmacology and Toxicology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atousa Aliahmadi
- Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C. Evin, Tehran, Iran
| | - Mohammad Ali As'habi
- Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C. Evin, Tehran, Iran
| | - Alireza Ghassempour
- Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C. Evin, Tehran, Iran.
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Tiwari AK, Aggarwal G, Kale P, Yadav N, Kumar V, Singh G, Cheirmaraj K, Krishnan K. Determination of optimum levels of binding antibody units (BAU) of new quantitative chemiluminescent immuno-assay (CLIA) in COVID-19 vaccinated volunteer blood donors. Transfus Apher Sci 2024; 63:103937. [PMID: 38678985 DOI: 10.1016/j.transci.2024.103937] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 03/23/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND For assessment of COVID-19 vaccine efficacy, neutralization activity of anti-SARS-CoV-2 antibody is measured. This study was undertaken to determine optimum levels of binding antibody units (BAU/ml) in new quantitative chemiluminescent assay (CLIA) that corresponded to neutralizing potential (30% inhibition) of sVNT assay. METHODS Ninety-one blood samples were analyzed by CLIA and sVNT assays. Test samples (n = 75) were collected from blood donors post-2nd vaccination dose, while control samples (n = 16) were archived pre-COVID donor samples. Correlation between CLIA and sVNT was calculated and receiver operating characteristic (ROC) curve was drawn and analyzed. RESULTS Results indicated excellent correlation between 57.5 BAU/ml on CLIA and 30%inhibition on sVNT assay. ROC curve analysis revealed that the area under the curve (AUC) was 0.971. DISCUSSION The present study determined that 57.5 BAU/ml on CLIA corresponded to 30% inhibition on sVNT assay. Periodic quantitative analysis.
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Affiliation(s)
- Aseem Kumar Tiwari
- Department of Transfusion Medicine Medanta-The Medicity, Sector-38, Gurgaon, India.
| | - Geet Aggarwal
- Department of Transfusion Medicine Medanta-The Medicity, Sector-38, Gurgaon, India
| | - Pratibha Kale
- Department of Clinical Microbiology Institute of Liver and Biliary Sciences, New Delhi, India
| | - Neeti Yadav
- Department of Transfusion Medicine Medanta-The Medicity, Sector-38, Gurgaon, India
| | - Virendra Kumar
- Department of Microbiology College of Life Sciences, Jiwaji University Gwalior, India
| | - Gargi Singh
- Medanta Institute of Education and Research Medanta-The Medicity, Sector-38, Gurgaon, India
| | - K Cheirmaraj
- Independent Laboratory Consultant, Chennai, Tamil Nadu, India
| | - K Krishnan
- Laboratory Medicine, Thane West, Mumbai 400606, India
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Tan S, Liu Z, Cong M, Zhong X, Mao Y, Fan M, Jiao F, Qiao H. Dandelion-derived vesicles-laden hydrogel dressings capable of neutralizing Staphylococcus aureus exotoxins for the care of invasive wounds. J Control Release 2024; 368:355-371. [PMID: 38432468 DOI: 10.1016/j.jconrel.2024.02.045] [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: 11/05/2023] [Revised: 02/01/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
Delayed wound healing caused by bacterial infection remains a major challenge in clinical treatment. Exotoxins incorporated in bacterial extracellular vesicles play a key role as the disease-causing virulence factors. Safe and specific antivirulence agents are expected to be developed as an effective anti-bacterial infection strategy, instead of single antibiotic therapy. Plant-derived extracellular vesicle-like nanoparticles have emerged as promising therapeutic agents for skin diseases, but the elucidations of specific mechanisms of action and clinical transformation still need to be advanced. Here, dandelion-derived extracellular vesicle-like nanoparticles (TH-EVNs) are isolated and exert antivirulence activity through specifically binding to Staphylococcus aureus (S. aureus) exotoxins, thereby protecting the host cell from attack. The neutralization of TH-EVNs against exotoxins has considerable binding force and stability, showing complete detoxification effect in vivo. Then gelatin methacryloyl hydrogel is developed as TH-EVNs-loaded dressing for S. aureus exotoxin-invasive wounds. Hydrogel dressings demonstrate good physical and mechanical properties, thus achieving wound retention and controlled release of TH-EVNs, in addition to promoting cell proliferation and migration. In vivo results show accelerated re-epithelialization, promotion of collagen maturity and reduction of inflammation after treatment. Collectively, the developed TH-EVNs-laden hydrogel dressings provide a potential therapeutic approach for S. aureus exotoxin- associated trauma.
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Affiliation(s)
- Shenyu Tan
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhuoya Liu
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Minghui Cong
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xiaoqing Zhong
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yinping Mao
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Mingjie Fan
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Fangwen Jiao
- Department of Pathogen Biology, School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Hongzhi Qiao
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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9
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Zhang L, Wang J, Wang S, Wang C, Yang F, Li T. Chemical characteristics of long-term acid rain and its impact on lake water chemistry: A case study in Southwest China. J Environ Sci (China) 2024; 138:121-131. [PMID: 38135381 DOI: 10.1016/j.jes.2023.03.028] [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: 01/07/2023] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 12/24/2023]
Abstract
The chemical composition of acid rain and its impact on lake water chemistry in Chongqing, China, from 2000 to 2020 were studied in this study. The regional acid rain intensity is affected jointly by the acid gas emissions and the neutralization of alkaline substances. The pH of precipitation experienced three stages of fluctuating decline, continuous improvement, and a slight correction. Precipitation pH showed inflection points in 2010, mainly due to the total control actions of SO2 and NOx implemented in 2011. The total ion concentrations in rural areas and urban areas were 489.08 µeq/L and 618.57 µeq/L, respectively. The top four ions were SO42-, Ca2+, NH4+ and NO3-, which accounted for more than 90% of the total ion concentration, indicating the anthropogenic effects. Before 2010, SO42- fluctuated greatly while NO3- continued to rise; however, after 2010, both SO42- and NO3- began to decline rapidly, with the rates of -12.03 µeq/(L·year) and -4.11 µeq/(L·year). Because the decline rate of SO42- was 2.91 times that of NO3-, the regional acid rain has changed from sulfuric acid rain to mixed sulfuric and nitric acid rain. The lake water is weakly acidic, with an average pH of 5.86, and the acidification frequency is 30.00%. Acidification of lake water is jointly affected by acid deposition and acid neutralization capacity of lake water. Acid deposition has a profound impact on water acidification, and nitrogen (N) deposition, especially reduced N deposition, should be the focus of future research.
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Affiliation(s)
- Liuyi Zhang
- Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou 404000, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jia Wang
- Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou 404000, China
| | - Shuxiao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
| | - Chunbo Wang
- Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou 404000, China
| | - Fumo Yang
- Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou 404000, China; College of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, China; National Engineering Research Center on Flue Gas Desulfurization, Chengdu 610065, China
| | - Tingzhen Li
- Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou 404000, China.
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10
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Mendoza-Tobar LL, Clement H, Arenas I, Guerrero-Vargas JA, Hernandez-Orihuela L, Cardoso-Arenas S, Sepulveda-Arias JC, Corzo G. Antimicrobial, toxicological, and antigenic characteristics of three scorpion venoms from Colombia: Centruroides margaritatus, Tityus pachyurus and Tityus n. sp. aff. metuendus. Acta Trop 2024; 252:107134. [PMID: 38286350 DOI: 10.1016/j.actatropica.2024.107134] [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: 12/09/2023] [Revised: 01/25/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024]
Abstract
The venom fractions of three buthid scorpion species from Colombia, C. margaritatus, T. pachyurus and T. n. sp. aff. metuendus, were examined for antimicrobial and toxicity toward mice and insects. The three venoms were separated into individual fractions using RP-HPLC, resulting in 85 fractions from C. margaritatus, 106 from T. pachyurus, and 70 from T. n. sp. aff. metuendus. The major fractions from the three scorpion venoms, which were eluted between 35 and 50 min, were tested for antimicrobial activity and toxicity. It was confirmed that the venom of the three species contains fractions with antimicrobial peptides that were evaluated against two bacterial strains of public health importance, Pseudomonas aeruginosa and Staphylococcus aureus. The venom of C. margaritatus had two antimicrobial fractions that showed activity against the named tested strains. The venom of T. pachyurus had three fractions that showed activity against S. aureus and two against both bacterial strains. Finally, the venom of T. n. sp. aff. metuendus had one fraction that showed activity against S. aureus, and five fractions showed activity against both bacterial strains. Also, some peptide fractions from the three venoms were toxic to mice. Last, the venoms of C. margaritatus and T. pachyurus were used as immunogens to obtain neutralizing antibodies against its respective venoms and to observe antibody recognition to related and unrelated scorpion venoms. A total of 15 mg of lyophilized antibodies were able to neutralize 1.5⋅LD50 of the venoms from T. n. sp. aff. metuendus, T. pachyurus and C. margaritatus, respectively. This information provides valuable insights into the diversity of each species' venom and their potential role in antimicrobial and venom toxicity.
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Affiliation(s)
- Leydy Lorena Mendoza-Tobar
- Programa de Doctorado en Ciencias Biomédicas, Facultad de Ciencias de la Salud, Grupo Infección e Inmunidad - Universidad Tecnológica de Pereira, Pereira 660003, Colombia; Grupo de Investigaciones Herpetológicas y Toxinológicas, Centro de Investigaciones Biomédicas-Bioterio, Departamento de Biología, Facultad de Ciencias Naturales, Exactas y de la Educación, Universidad del Cauca, Popayán 190002, Colombia
| | - Herlinda Clement
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM. Apartado Postal 510-3, Cuernavaca, Morelos 61500, Mexico
| | - Ivan Arenas
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM. Apartado Postal 510-3, Cuernavaca, Morelos 61500, Mexico
| | - Jimmy Alexander Guerrero-Vargas
- Grupo de Investigaciones Herpetológicas y Toxinológicas, Centro de Investigaciones Biomédicas-Bioterio, Departamento de Biología, Facultad de Ciencias Naturales, Exactas y de la Educación, Universidad del Cauca, Popayán 190002, Colombia
| | - Lorena Hernandez-Orihuela
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM. Apartado Postal 510-3, Cuernavaca, Morelos 61500, Mexico
| | - Samuel Cardoso-Arenas
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM. Apartado Postal 510-3, Cuernavaca, Morelos 61500, Mexico
| | - Juan Carlos Sepulveda-Arias
- Programa de Doctorado en Ciencias Biomédicas, Facultad de Ciencias de la Salud, Grupo Infección e Inmunidad - Universidad Tecnológica de Pereira, Pereira 660003, Colombia
| | - Gerardo Corzo
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM. Apartado Postal 510-3, Cuernavaca, Morelos 61500, Mexico.
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11
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Cheng SMS, Mok CKP, Li JKC, Chan KKP, Luk KS, Lee BHW, Gu H, Chan KCK, Tsang LCH, Yiu KYS, Ling KKC, Tang YS, Luk LLH, Yu JKM, Pekosz A, Webby RJ, Cowling BJ, Hui DSC, Peiris M. Cross-neutralizing antibody against emerging Omicron subvariants of SARS-CoV-2 in infection-naïve individuals with homologous BNT162b2 or BNT162b2(WT + BA.4/5) bivalent booster vaccination. Virol J 2024; 21:70. [PMID: 38515117 PMCID: PMC10956325 DOI: 10.1186/s12985-024-02335-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/02/2024] [Indexed: 03/23/2024] Open
Abstract
Since the emergence of SARS-CoV-2, different variants and subvariants successively emerged to dominate global virus circulation as a result of immune evasion, replication fitness or both. COVID-19 vaccines continue to be updated in response to the emergence of antigenically divergent viruses, the first being the bivalent RNA vaccines that encodes for both the Wuhan-like and Omicron BA.5 subvariant spike proteins. Repeated infections and vaccine breakthrough infections have led to complex immune landscapes in populations making it increasingly difficult to assess the intrinsic neutralizing antibody responses elicited by the vaccines. Hong Kong's intensive COVID-19 containment policy through 2020-2021 permitted us to identify sera from a small number of infection-naïve individuals who received 3 doses of the RNA BNT162b2 vaccine encoding the Wuhan-like spike (WT) and were boosted with a fourth dose of the WT vaccine or the bivalent WT and BA.4/5 spike (WT + BA.4/5). While neutralizing antibody to wild-type virus was comparable in both vaccine groups, BNT162b2 (WT + BA.4/BA.5) bivalent vaccine elicited significantly higher plaque neutralizing antibodies to Omicron subvariants BA.5, XBB.1.5, XBB.1.16, XBB.1.9.1, XBB.2.3.2, EG.5.1, HK.3, BA.2.86 and JN.1, compared to BNT162b2 monovalent vaccine. The single amino acid substitution that differentiates the spike of JN.1 from BA.2.86 resulted in a profound antigenic change.
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Affiliation(s)
- Samuel M S Cheng
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chris K P Mok
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- SH Ho Research Centre for Emerging Infectious Diseases, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - John K C Li
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ken K P Chan
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kristine S Luk
- Princess Margaret Hospital, Hospital Authority, Hong Kong SAR, China
| | - Ben H W Lee
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Haogao Gu
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Karl C K Chan
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Leo C H Tsang
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Karen Y S Yiu
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ken K C Ling
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yun Sang Tang
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Leo L H Luk
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Jennifer K M Yu
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Andrew Pekosz
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Richard J Webby
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Benjamin J Cowling
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - David S C Hui
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- SH Ho Research Centre for Emerging Infectious Diseases, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Malik Peiris
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
- Centre for Immunology and Infection, Hong Kong Science Park, Hong Kong SAR, China.
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12
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Dashti N, Golsaz-Shirazi F, Jeddi-Tehrani M, Zarnani AH, Amiri MM, Shokri F. Comparative Immunogenicity and Neutralization Potency of Four Approved COVID-19 Vaccines in BALB/c Mice. Iran J Immunol 2024; 21:1-14. [PMID: 38433582 DOI: 10.22034/iji.2024.101060.2728] [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] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Background Since the outbreak of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), several vaccine candidates have been developed within a short period of time. Although the potency of these vaccines was evaluated individually, their comparative potency was not comprehensively evaluated. Objective To compare the immunogenicity and neutralization efficacy of four approved COVID-19 vaccines in Iran, including: PastoCovac Plus, Sinopharm, SpikoGen, and Noora in BALB/c mice. Methods Different groups of female BALB/c mice were vaccinated with three doses of each vaccine. The serum levels of antibodies against the viral receptor binding domain (anti-RBD) and spike (anti-spike) protein as well as the vaccine formulation (anti-vaccine) were evaluated using enzyme-linked immunosorbent assay (ELISA). The neutralization efficacy of these four vaccines was assessed through four neutralization assays: conventional virus neutralization test (cVNT), pseudotype virus neutralization test (pVNT), surrogate virus neutralization test (sVNT), and inhibition flow cytometry. Results All four vaccines induced seroconversion in vaccinated animals. All vaccines successfully induced high levels of anti-vaccine antibody; however, PastoCovac Plus and Sinopharm vaccines induced significantly higher levels of anti-RBD antibody titer compared to Noora and SpikoGen. Moreover, the results of the antibody response were corroborated by the virus neutralization tests, which revealed very weak neutralization potency by Noora and SpikoGen in all tests. Conclusion Our results indicate significant immunogenicity and neutralization efficacy induced by PastoCovac Plus and Sinopharm, but not by Noora and SpikoGen. This suggests the need for additional comparative assessment of the potency and efficacy of these four vaccines in vaccinated subjects.
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Affiliation(s)
- Navid Dashti
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Forough Golsaz-Shirazi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Amir-Hassan Zarnani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Reproductive Immunology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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13
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Lavell AHA, Schramade AE, Sikkens JJ, van der Straten K, van Dort KA, Slim MA, Appelman B, van Vught LA, Vlaar APJ, Kootstra NA, van Gils MJ, Smulders YM, de Jongh RT, Bomers MK. 25-Hydroxyvitamin D concentrations do not affect the humoral or cellular immune response following SARS-CoV-2 mRNA vaccinations. Vaccine 2024; 42:1478-1486. [PMID: 37775466 DOI: 10.1016/j.vaccine.2023.08.025] [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: 03/10/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND To improve effectiveness of vaccination against SARS-CoV-2, it is important to identify factors that influence the immune response induced by vaccination. Evidence for the role of vitamin D in immune response against SARS-CoV-2 is contradictory. It is therefore of interest whether 25-hydroxyvitamin D (25[OH]D) concentrations affect the humoral and/or cellular response following SARS-CoV-2 vaccination. METHODS In this prospective cohort study, blood samples were collected from 98 SARS-CoV-2 naive health care workers (HCW) receiving the first two doses of either BNT162b2 or mRNA-1273 in 2021. Wild-type spike (S) protein binding and neutralizing antibodies were determined approximately three weeks after the first dose and four to five weeks after the second dose. Antigen specific T-cells and functionality (proliferative response and interferon gamma [IFN-γ] release) were determined in 18 participants four weeks after the second dose of BNT162b2. We studied the association between 25(OH)D concentrations, which were determined prior to vaccination, and humoral and cellular immune responses following vaccination. RESULTS We found no association between 25(OH)D concentrations (median 55.9 nmol/L [IQR 40.5-69.8]) and binding or neutralizing antibody titers after complete vaccination (fold change of antibody titers per 10 nmol/L 25(OH)D increase: 0.98 [95% CI 0.93-1.04] and 1.03 [95% CI: 0.96-1.11], respectively), adjusted for age, sex and type of mRNA vaccine. Subsequently, continuous 25(OH)D concentrations were divided into commonly used clinical categories (<25 nmol/L [n = 6, 6%], 25-49 nmol/L [n = 33, 34%], 50-75 nmol/L [n = 37, 38%] and ≥75 nmol/L [n = 22, 22%]), but no association with the humoral immune response following vaccination was found. Also, 25(OH)D concentrations were not associated with the SARS-CoV-2 specific T cell response. CONCLUSION No association was found between 25(OH)D concentrations and the humoral or cellular immune response following mRNA vaccination against SARS-CoV-2. Based on our findings there is no rationale to advise vitamin D optimization preceding SARS-CoV-2 vaccination in HCW with moderate vitamin D status.
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Affiliation(s)
- A H A Lavell
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands
| | - A E Schramade
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands
| | - J J Sikkens
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands
| | - K van der Straten
- Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Laboratory of Experimental Virology, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Internal Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - K A van Dort
- Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Experimental Immunology, 1105 AZ, the Netherlands
| | - M A Slim
- Amsterdam UMC Location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, Amsterdam 1105 AZ, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Intensive Care, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - B Appelman
- Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, Amsterdam 1105 AZ, the Netherlands
| | - L A van Vught
- Amsterdam UMC Location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, Amsterdam 1105 AZ, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Intensive Care, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - A P J Vlaar
- Amsterdam UMC Location University of Amsterdam, Department of Intensive Care, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A.), Meibergdreef 9, Amsterdam 1105 AZ, the Netherlands
| | - N A Kootstra
- Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Experimental Immunology, 1105 AZ, the Netherlands
| | - M J van Gils
- Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Laboratory of Experimental Virology, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Y M Smulders
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands
| | - R T de Jongh
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Gastroenterology Endocrinology Metabolism Research Institute, Amsterdam, the Netherlands
| | - M K Bomers
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Internal Medicine, Department of Infectious Diseases and Department of Endocrinology and Metabolism, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands; Amsterdam Institute for Infection & Immunity, Amsterdam, the Netherlands.
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14
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Chumbe A, Grobben M, Capella-Pujol J, Koekkoek SM, Zon I, Slamanig S, Merat SJ, Beaumont T, Sliepen K, Schinkel J, van Gils MJ. A panel of hepatitis C virus glycoproteins for the characterization of antibody responses using antibodies with diverse recognition and neutralization patterns. Virus Res 2024; 341:199308. [PMID: 38171391 PMCID: PMC10821612 DOI: 10.1016/j.virusres.2024.199308] [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: 09/13/2023] [Revised: 12/28/2023] [Accepted: 01/01/2024] [Indexed: 01/05/2024]
Abstract
A vaccine against Hepatitis C virus (HCV) is urgently needed to limit the spread of HCV. The large antigenic diversity of the HCV glycoprotein E1E2 makes it difficult to design a vaccine but also to fully understand the antibody response after infection or vaccination. Here we designed a panel of HCV pseudoparticles (HCVpps) that cover a wide range of genetically and antigenically diverse E1E2s. We validate our panel using neutralization and a binding antibody multiplex assay (BAMA). The panel of HCVpps includes E1E2 glycoproteins from acute and chronically infected cases in the Netherlands, as well as E1E2 glycoproteins from previously reported HCVs. Using eight monoclonal antibodies targeting multiple antigenic regions on E1E2, we could categorize four groups of neutralization sensitive viruses with viruses showing neutralization titers over a 100-fold range. One HCVpp (AMS0230) was extremely neutralization resistant and only neutralized by AR4-targeting antibodies. In addition, using binding antibody multiplex competition assay, we delineated mAb epitopes and their interactions. The binding and neutralization sensitivity of the HCVpps were confirmed using patient sera. At the end, eleven HCVpps with unique antibody binding and neutralization profiles were selected as the final panel for standardized HCV antibody assessments. In conclusion, this HCVpp panel can be used to evaluate antibody binding and neutralization breadth and potency as well as delineate the epitopes targeted in sera from patients or candidate vaccine trials. The HCVpp panel in combination with the established antibody competition assay present highly valuable tools for HCV vaccine development and evaluation.
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Affiliation(s)
- Ana Chumbe
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Marloes Grobben
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Joan Capella-Pujol
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Sylvie M Koekkoek
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Ian Zon
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Stefan Slamanig
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | | | - Tim Beaumont
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands; AIMM Therapeutics, Amsterdam, the Netherlands
| | - Kwinten Sliepen
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands
| | - Janke Schinkel
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands.
| | - Marit J van Gils
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious Diseases, Amsterdam, the Netherlands.
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15
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Zhang B, Han Q, Liu Q, Wang Y, Bao J. Recycling of waste calcium carbonate in lignocellulosic biorefining chain for chiral lactic acid production. Bioresour Technol 2024; 395:130303. [PMID: 38199439 DOI: 10.1016/j.biortech.2024.130303] [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: 12/04/2023] [Revised: 12/28/2023] [Accepted: 01/06/2024] [Indexed: 01/12/2024]
Abstract
One of the major end-products of lignocellulosic biorefining chain is the solid residues containing various compounds. The present approach to solid residues treatment is combustion for generation of heat and electricity. This study investigated the potential for recycling of the combustion ash from the solid residues after lignocellulosic dry biorefining process. A range of characterizations showed that the combustion ash contained a high amount of calcium carbonate. By recycling the ash as the neutralizer in biorefining process, the waste calcium carbonate in the ash was efficiently utilized for pretreated biomass neutralization and can replace 40 % of calcium hydroxide for lactic acid production. The chiral L-lactic acid titer reached 102.4 ± 3.6 g/L from 20 % (w/w) solids loading of wheat straw. Three feasible strategies of ash recycling for the investigated biorefinery concept were further proposed base on the rigorous calcium mass calculation, which can efficiently reduce the consumption of neutralizers.
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Affiliation(s)
- Bin Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Qingmei Han
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Qi Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ya Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Beisi Road, Shihezi, Xinjiang 800032, China
| | - Jie Bao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
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16
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Zhao R, Wu X, Zhu G, Zhang X, Liu F, Mu W. Revealing the release and migration mechanism of heavy metals in typical carbonate tailings, East China. J Hazard Mater 2024; 464:132978. [PMID: 37984137 DOI: 10.1016/j.jhazmat.2023.132978] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/07/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023]
Abstract
Refining the occurrence characteristics of tailings hazardous materials at source is of great importance for pollution management and ecological reclamation. However, the release and transport of heavy metals (HMs) from tailings under rainfall drenching in simulated real-world environments is less well portrayed, particularly highlighting the inherent neutralisation in tailings wastes under superimposed dynamic conditions. In this study, dynamic leaching columns simulating actual conditions were used to observe the release and transport of HMs from tailings under acid rainfall infiltration at spatial and temporal scales. The release rate of trace elements (e.g., As, Cr, Ni, Pb, Cd) is high. Neutralisation in the presence of carbonate rocks in the gangue reduces HMs release intensity from tailings with high heavy metal content, along with the precipitation of iron oxides and chromium-bearing minerals, etc. In addition, the vertical differentiation of HMs is more relevant to physical processes. In the absence of carbonate rocks in gangue, the lowest pH value is reached within 1.2 h after acid rain infiltrates the tailings. At the same time, Cu, Zn and Cd are released significantly from the minerals at the superficial level. The release of As(III) is mainly concentrated in the early and late stages of water-rock contact.
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Affiliation(s)
- Rong Zhao
- Key Laboratory of Groundwater Conservation of MWR, China University of Geosciences, Beijing 100083, PR China; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Xiong Wu
- Key Laboratory of Groundwater Conservation of MWR, China University of Geosciences, Beijing 100083, PR China; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Ge Zhu
- Department of Hydrogeology and Environmental Geology, China Geological Survey, Beijing 100011, PR China
| | - Xiao Zhang
- Key Laboratory of Groundwater Conservation of MWR, China University of Geosciences, Beijing 100083, PR China; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Fei Liu
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China; MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Wenping Mu
- School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China
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17
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Lim ASS, Tan KY, Tan CH. Immunoreactivity and neutralization efficacy of Pakistani Viper Antivenom (PVAV) against venoms of Saw-scaled Vipers (Echis carinatus subspp.) and Western Russell's Vipers (Daboia russelii) from the Indian subcontinent. Acta Trop 2024; 250:107099. [PMID: 38097152 DOI: 10.1016/j.actatropica.2023.107099] [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: 10/19/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/31/2023]
Abstract
Snakebite envenoming (SBE) is a priority Neglected Tropical Disease listed by the World Health Organization. South Asia is heavily affected, and virtually all countries in the region import polyvalent antivenom products from India for clinical use. The imported antivenoms, however, have suboptimal effectiveness due to geographical venom variation. Recently, a domestic bivalent product, named Pakistani Viper Antivenom (PVAV) has been developed specifically for Pakistani vipers, Echis carinatus sochureki and Daboia russelii. As a bivalent viperid antivenom, it is unknown yet if PVAV exhibits higher immunological binding and neutralization activities against viper venoms from distant locales compared with polyvalent antivenoms manufactured in India. This study thus examined the preclinical efficacy of PVAV against venoms of Western Russell's Vipers and Saw-scaled Viper subspecies from selected locales in the Indian subcontinent. PVAV generally outperformed the commonly used VINS polyvalent antivenom (VPAV, manufactured in India) in binding toward venoms, and showed superior or comparable neutralization efficacy against the venom procoagulant and hemorrhagic effects of Saw-scaled Vipers as well as Russell's Vipers from Pakistan and Sri Lanka. Based on normalized potency values, PVAV is far more potent than VPAV in neutralizing the lethality of all viper venoms, except that of the Indian Russell's Viper. The study shows conserved antigenicity of toxins responsible for major toxicity across these viperid venoms, and suggests the feasible production of a viper-specific antivenom with higher potency and broader geographical utility for the region.
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Affiliation(s)
- Andy Shing Seng Lim
- Venom Research and Toxicology Laboratory, Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Kae Yi Tan
- Protein and Interactomics Laboratory, Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Choo Hock Tan
- Venom Research and Toxicology Laboratory, Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
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18
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Schump MD, Bernstein DI, Bravo FJ, Neff CP. Selection, activity, and nuclease stabilization of cross-neutralizing DNA aptamers targeting HSV-1 and HSV-2. Virology 2024; 589:109916. [PMID: 37925791 DOI: 10.1016/j.virol.2023.109916] [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: 07/30/2023] [Revised: 10/03/2023] [Accepted: 10/19/2023] [Indexed: 11/07/2023]
Abstract
Cross-neutralizing aptamers targeting both HSV-1 and HSV-2 were developed by selecting against the ectodomains of glycoprotein D (gD) from both viruses in parallel as well as sequentially using the SELEX method. Since gD facilitates viral invasion, sterically blocking the host-receptor interaction prevents infection. Candidate aptamers were screened, and lead aptamers were identified that exhibited exceptional neutralizing activity against both viruses in vitro. The specificity of the aptamers was confirmed by comparing their activity to scrambled versions of themselves. Modifications of the lead compounds were tested to define critical motifs to guide development. Stability of the aptamers was increased using phosphorothioate backbone linkages, and 2' methoxy substitutions of terminal and key internal bases. Aptamers were applied in a guinea pig vaginal HSV-2 infection model and found to reduce both the viral load of infected animals and the severity of the resulting disease. These results suggest that cross-neutralizing aptamers can be developed into on-demand antiviral interventions effective against both HSV-1 and HSV-2.
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Affiliation(s)
- Michael D Schump
- Apspeeda Biosciences, 12635 E. Montview Blvd., Ste 100, Aurora, CO, USA
| | - David I Bernstein
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Fernando J Bravo
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Charles P Neff
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
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19
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Moullan N, Asiago J, Stecco K, Hadi S, Albizem M, Tieu H, Hock B, Fenwick C, Lin K, Lengsfeld T, Poffenbarger L, Liu D, Trono D, Pantaleo G, Venkayya R, Bhuyan P. A First-in-Human Randomized Study to Assess the Safety, Tolerability, Pharmacokinetics, and Neutralization Profile of Two Investigational Long-Acting Anti-SARS-CoV-2 Monoclonal Antibodies. Infect Dis Ther 2024; 13:173-187. [PMID: 38221576 PMCID: PMC10828317 DOI: 10.1007/s40121-023-00908-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 12/14/2023] [Indexed: 01/16/2024] Open
Abstract
INTRODUCTION COVID-19 remains a significant risk for the immunocompromised given their lower responsiveness to vaccination or infection. Therefore, passive immunity through long-acting monoclonal antibodies (mAbs) offers a needed approach for pre-exposure prophylaxis (PrEP). Our study evaluated safety, anti-SARS-CoV-2 neutralizing activity, nasal penetration, and pharmacokinetics (PK) of two half-life-extended investigational mAbs, AER001 and AER002, providing the first demonstration of upper airway penetration of mAbs with the LS-modification. METHODS This randomized, double-blind, placebo-controlled phase I study enrolled healthy adults (n = 80) who received two long-acting COVID mAbs (AER001 and AER002), AER002 alone, or placebo. The dose ranged from 100 mg (mg) to 1200 mg per mAb component. The primary objective was to describe the safety and tolerability following intravenous (IV) administration. Secondary objectives were to describe PK, anti-drug antibodies (ADA), neutralization activity levels, and safety evaluation through 6 months of follow-up. RESULTS The majority (97.6%) of the reported adverse events (AE) post administration were of grade 1 severity. There were no serious adverse events (SAE) or ADAs. AER001 and AER002 successfully achieved an extended half-life of 105 days and 97.5 days, respectively. Participants receiving AER001 and AER002 (300 mg each) or AER002 (300 mg) alone showed 15- and 26-fold higher neutralization levels against D614G and omicron BA.1 than the placebo group 24 h post-administration. Single 300 or 1200 mg IV dose of AER001 and AER002 resulted in nasal mucosa transudation of approximately 2.5% and 2.7%, respectively. CONCLUSION AER001 and AER002 showed an acceptable safety profile and extended half-life. High serum neutralization activity was observed against D614G and Omicron BA.1 compared to the placebo group. These data support that LS-modified mAbs can achieve durability, safety, potency, and upper airway tissue penetration and will guide the development of the next generation of mAbs for COVID-19 prevention and treatment. TRIAL REGISTRATION EudraCT Number 2022-001709-35 (COV-2022-001).
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Affiliation(s)
| | | | | | | | | | | | - Björn Hock
- Lavaux Biotech Consulting, Yens, Switzerland
| | | | - Kai Lin
- Aerium Therapeutics, Boston, MA, USA
| | | | | | - David Liu
- Aerium Therapeutics, Boston, MA, USA
| | - Didier Trono
- School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Giuseppe Pantaleo
- Service of Immunology and Allergy, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- Swiss Vaccine Research Institute, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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20
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Santibanez S, Mankertz A. Measles Foci Reduction Neutralization Test (FRNT). Methods Mol Biol 2024; 2808:209-224. [PMID: 38743373 DOI: 10.1007/978-1-0716-3870-5_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
The plaque reduction neutralization test (PRNT) and the enzyme-linked immunosorbent assay (ELISA) are both widely used to assess immunity to infectious diseases such as measles, but they use two different measurement principles: ELISA measures the ability of antibodies to bind to virus components, while the PRNT detects the aptitude of antibodies to prevent the infection of a susceptible cell. As a result, detection of measles virus (MV) neutralizing antibodies is the gold standard for assessing immunity to measles. However, the assay is laborious and requires experience and excellent technical skills. In addition, the result is only available after several days. Therefore, the classical PRNT is not suitable for high-throughput testing. By using an immunocolorimetric assay (ICA) to detect MV-infected cells, the standard PRNT has been developed into a focus reduction neutralization test (FRNT). This assay is faster and has improved specificity. The FRNT described here is extremely useful when immunity to measles virus needs to be assessed in patients with a specific medical condition, such as immunocompromised individuals in whom presumed residual immunity needs to be assessed. The FRNT is not generally recommended for use with large numbers of specimens, such as in a seroprevalence study.
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Affiliation(s)
- Sabine Santibanez
- National Reference Center Measles, Mumps, Rubella, Robert Koch-Institute, Berlin, Germany
| | - Annette Mankertz
- National Reference Center Measles, Mumps, Rubella, Robert Koch-Institute, Berlin, Germany.
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21
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Zarzosa V, Lomonte B, Zamudio F, Ponce-López R, Olvera-Rodríguez F, Borja M, Alagón A, Neri-Castro E. Venom of the neotropical rattlesnake, Crotalus culminatus: Intraspecific variation, neutralization by antivenoms, and immunogenicity in rabbits. Biochimie 2024; 216:160-174. [PMID: 37890695 DOI: 10.1016/j.biochi.2023.10.014] [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: 08/18/2023] [Revised: 10/20/2023] [Accepted: 10/22/2023] [Indexed: 10/29/2023]
Abstract
Crotalus culminatus is a medically significant species of rattlesnake in Mexico [1]. While the proteomic composition of its venom has been previously reported for both juvenile and adult specimens, there has been limited research into its functional properties, with only a few studies, including one focusing on coagulotoxicity mechanisms. In this study, we aimed to compare the biochemical and biological activities of the venom of juvenile and adult snakes. Additionally, we assessed antibody production using the venoms of juveniles and adults as immunogens in rabbits. Our findings reveal lethality and proteolytic activity differences between the venoms of juveniles and adults. Notably, juvenile venoms exhibited high proportions of crotamine, while adult venoms displayed a reduction of this component. A commercially available antivenom demonstrated effective neutralization of lethality of both juvenile and adult venoms in mice. However, it failed to neutralize the paralytic activity induced by crotamine, which, in contrast, was successfully inhibited by antibodies obtained from hyperimmunized rabbits. These results suggest the potential inclusion of C. culminatus venom from juveniles in commercial antivenom immunization schemes to generate antibodies targeting this small myotoxin.
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Affiliation(s)
- Vanessa Zarzosa
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica
| | - Fernando Zamudio
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico
| | - Roberto Ponce-López
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico
| | - Felipe Olvera-Rodríguez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico
| | - Miguel Borja
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Avenida Universidad s/n, Fracc, Filadelfia, C.P. 35010, Gómez Palacio, Dgo., Mexico
| | - Alejandro Alagón
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico.
| | - Edgar Neri-Castro
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Avenida Universidad s/n, Fracc, Filadelfia, C.P. 35010, Gómez Palacio, Dgo., Mexico; Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad 2001, Chamilpa, C.P. 62210, Cuernavaca, Mor., Mexico.
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22
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Shi H, Sun J, Zeng Y, Wang X, Liu S, Zhang L, Shao E. Immune escape of SARS-CoV-2 variants to therapeutic monoclonal antibodies: a system review and meta-analysis. Virol J 2023; 20:266. [PMID: 37968649 PMCID: PMC10652597 DOI: 10.1186/s12985-023-01977-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/25/2023] [Indexed: 11/17/2023] Open
Abstract
BACKGROUND Omicron's high transmissibility and variability present new difficulties for COVID-19 vaccination prevention and therapy. In this article, we analyzed the sensitivity of vaccine-induced antibodies as well as the effect of booster vaccinations against Omicron sublineages. METHODS We looked for Randomized Controlled Trials and cohort studies that reported the COVID-19 vaccines against Omicron sublineages up to 28 July 2022 through PubMed, the Cochrane Library, EMBASE, and Web of Science. Quantitative synthesis was carried out using Stata 16.0 and RevMa5.3, then the serum NT50 and antibody sensitivity to neutralize Omicron sublineages were assessed before and after booster vaccination. This study was registered with PROSPERO number CRD42022350477. RESULTS This meta-analysis included 2138 patients from 20 studies, and the booster vaccination against Omicron sublineages showed a significant difference compared to 2 dosage: BA.1/BA.1.1 (SMD = 0.80, 95% CI: 0.75-0.85, P = 0.00), BA.2/BA.2.12.1 (SMD = 0.77, 95% CI: 0.69-0.85, P = 0.00), BA.3 (SMD = 0.91, 95% CI: 0.83-1.0, P = 0.00), and BA.4/5 (SMD = 0.77, 95% CI: 0.60-0.94, P = 0.00). The sensitivity of vaccines-induced antibodies decreased by at least 5-folds after booster vaccination, particularly in the case of BA.4/5 which had the most notable decline in vaccine effectiveness. CONCLUSION After the booster vaccination, the NT50 and the neutralization ability of vaccine-induced antibodies increased, but the susceptibility of antibodies decreased compared with the control virus, which may be a clue for future Omicron sublineages prevention.
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Affiliation(s)
- Huichun Shi
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Jiajia Sun
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450099, China
| | - Yigang Zeng
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Xiaomeng Wang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Shanshan Liu
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China
| | - Lijun Zhang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China.
| | - Enming Shao
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China.
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23
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Degn LLT, Bech D, Christiansen G, Birkelund S. Lack of neutralization of Chlamydia trachomatis infection by high avidity monoclonal antibodies to surface-exposed major outer membrane protein variable domain IV. Mol Immunol 2023; 163:163-173. [PMID: 37801817 DOI: 10.1016/j.molimm.2023.09.015] [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: 05/13/2023] [Revised: 07/21/2023] [Accepted: 09/17/2023] [Indexed: 10/08/2023]
Abstract
Chlamydia trachomatis is the leading cause of sexually transmitted diseases causing frequent, long-lasting, and often asymptomatic recurrent infections resulting in severe reproductive complications. C. trachomatis is an intracellular Gram-negative bacterium with a biphasic developmental cycle in which extracellular, infectious elementary bodies (EB) alternate with the intracellular replicating reticulate bodies (RB). The outer membrane of EB consists of a tight disulfide cross-linking protein network. The most essential protein is the 42 kDa major outer membrane protein (MOMP) that contributes to the rigid structural integrity of the outer membrane. MOMP is a transmembrane protein with a β-barrel structure consisting of four variable domains (VD) separated by five constant domains. VDIV possesses surface-exposed species-specific epitopes recognized by the immune system and, therefore, functions as a candidate for vaccine development. To analyze the protective contribution of antibodies for a MOMP vaccine, we investigated the specificity and binding characteristics of two monoclonal antibodies (MAb)224.2 and MAb244.4 directed against C. trachomatis serovar D MOMP. By immunoelectron microscopy, we found that both MAb bind to the surface of C. trachomatis EB. By epitope mapping, we characterized the MOMP epitope as linear consisting of 6 amino acids: 322TIAGAGD328. By ELISA it was shown that both antibodies bind with a higher avidity to the chlamydial surface compared to binding to monomeric MOMP, indicating that the antibodies bind divalently to the surface of C. trachomatis EB. Despite strong binding to the chlamydial surface, the antibodies only partially reduced the infectivity. This may be explained by the observation that even though both MAb covered the EB surface, antibodies could not be regularly detected on EB after the uptake into the host cell.
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Affiliation(s)
- Laura Lind Throne Degn
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark; Department of Clinical Medicine, Department of Clinical Immunology, Aalborg University Hospital, Urbansgade 32, 9000 Aalborg, Denmark
| | - Ditte Bech
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark
| | - Gunna Christiansen
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark
| | - Svend Birkelund
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark.
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24
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Lassaunière R, Polacek C, Linnea Tingstedt J, Fomsgaard A. Preclinical evaluation of a SARS-CoV-2 variant B.1.351-based candidate DNA vaccine. Vaccine 2023; 41:6505-6513. [PMID: 37726179 DOI: 10.1016/j.vaccine.2023.09.021] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/22/2023] [Accepted: 09/12/2023] [Indexed: 09/21/2023]
Abstract
The SARS-CoV-2 pandemic revealed the critical shortfalls of global vaccine availability for emergent pathogens and the need for exploring additional vaccine platforms with rapid update potential in response to new variants. Thus, it remains essential, for the present evolving SARS-CoV-2/Covid-19 and future pandemics, to continuously develop and characterize new and different vaccine platforms. Here, we describe an expression-optimized DNA vaccine candidate based on the SARS-CoV-2 spike protein of the Beta variant (B.1.351), pNTC-Spike.351, and, in animal models, compare its immunogenicity with a similar DNA vaccine encoding the ancestral index strain spike protein, pNTC-Spike. Both DNA vaccines induced neutralizing antibodies and a Th1 biased immune response. In contrast to the index-specific vaccine, the Beta-specific DNA vaccine induced antibodies in mice and rabbits that, even at low levels, efficiently neutralize the otherwise antibody resistant Beta variant. It similarly neutralized unrelated variants bearing the neutralization resistant E484K spike mutation. Intensive priming using two vaccinations with pNTC-Spike and a single booster immunization with the pNTC-Spike.351 induced a more robust neutralizing antibody response with comparable magnitude against different variants of concern. Thus, DNA vaccine technology with heterologous spike protein prime-boost should be explored further using the Beta derived pNTC-Spike.351 to broaden neutralizing antibody responses against emerging variants of concern.
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Affiliation(s)
- Ria Lassaunière
- Department of Virus and Microbiological Special Diagnostic, Statens Serum Institut, Copenhagen, Denmark
| | - Charlotta Polacek
- Department of Virus and Microbiological Special Diagnostic, Statens Serum Institut, Copenhagen, Denmark
| | - Jeanette Linnea Tingstedt
- Department of Virus and Microbiological Special Diagnostic, Statens Serum Institut, Copenhagen, Denmark
| | - Anders Fomsgaard
- Department of Virus and Microbiological Special Diagnostic, Statens Serum Institut, Copenhagen, Denmark; Infectious Disease Research Unit, Clinical Institute, University of Southern Denmark, Odense, Denmark.
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25
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Rheinbaben F, Köhnlein J, Schmidt N, Hildebrandt C, Werner S. To reduce cytotoxicity when testing the virucidal activity of chemical disinfectants and biocides: The "T-25 method" as an alternative to "large-volume-plating". Heliyon 2023; 9:e20728. [PMID: 37876415 PMCID: PMC10590779 DOI: 10.1016/j.heliyon.2023.e20728] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 09/28/2023] [Accepted: 10/04/2023] [Indexed: 10/26/2023] Open
Abstract
When testing the virucidal activity of biocides, the non-inactivated residual virus is titrated on cell cultures by the end point dilution method on 96-well tissue culture plates. However, residues of the biocide to be tested also come into contact with the cell cultures in varying concentrations and thus can lead to cytotoxic effects even at high levels of dilution. In the European standards for testing biocides, in particular disinfectants, methods such as Large-Volume-Plating (LVP) method and, in some guidelines, gel filtration procedures are described for reducing cytotoxic effects in the case of highly cytotoxic products, if the classical dilution method proves to be impractical. In order to enable the testing of highly cytotoxic biocides for their activity against viruses, an alternative method for reducing cytotoxicity is introduced, which is based on a procedure of isolating infectious viruses from cytotoxic patients' materials such as stool and can be applied when the other methods fail.
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Affiliation(s)
| | | | | | | | - S. Werner
- HygCen Germany GmbH, Schwerin, Germany
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26
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Tang J, Fu M, Xu C, Xue B, Zhou A, Chen S, Zhao H, Zhou Y, Chen J, Yang Q, Chen X. Development of a novel virus-like particle-based vaccine for preventing tick-borne encephalitis virus infection. Virol Sin 2023; 38:767-777. [PMID: 37328107 PMCID: PMC10590693 DOI: 10.1016/j.virs.2023.06.003] [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: 03/12/2023] [Accepted: 06/12/2023] [Indexed: 06/18/2023] Open
Abstract
Tick-borne encephalitis virus (TBEV) is an important tick-borne pathogen that poses as a serious public health concern. The coverage and immunogenicity of the currently available vaccines against TBEV are relatively low; therefore, it is crucial to develop novel and effective vaccines against TBEV. The present study describes a novel strategy for the assembly of virus-like particles (VLPs) by co-expressing the structural (core/prM/E) and non-structural (NS2B/NS3Pro) proteins of TBEV. The efficacy of the VLPs was subsequently evaluated in C57BL/6 mice, and the resultant IgG serum could neutralize both Far-Eastern and European subtypes of TBEV. These findings indicated that the VLP-based vaccine elicited the production of cross-subtype reactive antibodies. The VLPs provided protection to mice lacking the type I interferon receptor (IFNAR-/-) against lethal TBEV challenge, with undetectable viral load in brain and intestinal tissues. Furthermore, the group that received the VLP vaccine did not exhibit significant pathological changes and the inflammatory factors were significantly suppressed compared to the control group. Immunization with the VLP vaccine induced the production of multiple-cytokine-producing antiviral CD4+ T cells in vivo, including TNF-α+, IL-2+, and IFN-γ+ T cells. Altogether, the findings suggest that noninfectious VLPs can serve as a potentially safe and effective vaccine candidate against diverse subtypes of TBEV.
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Affiliation(s)
- Jielin Tang
- Guangzhou National Laboratory, Guangzhou, 510005, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Muqing Fu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Chonghui Xu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Bao Xue
- Guangzhou National Laboratory, Guangzhou, 510005, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Anqi Zhou
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Sijie Chen
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - He Zhao
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Yuan Zhou
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Jizheng Chen
- Guangzhou National Laboratory, Guangzhou, 510005, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China; State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, 511436, China
| | - Qi Yang
- Guangzhou National Laboratory, Guangzhou, 510005, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China.
| | - Xinwen Chen
- Guangzhou National Laboratory, Guangzhou, 510005, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China; State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, 511436, China.
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Cantu JC, Barnes RA, Gamboa BM, Keister AS, Echchgadda I, Ibey BL. Effect of nanosecond pulsed electric fields (nsPEFs) on coronavirus survival. AMB Express 2023; 13:95. [PMID: 37689615 PMCID: PMC10492771 DOI: 10.1186/s13568-023-01601-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/30/2023] [Indexed: 09/11/2023] Open
Abstract
Previous work demonstrated inactivation of influenza virus by GHz frequency electromagnetic fields. Despite theoretical and experimental results, the underlying mechanism driving this inactivation remains unknown. One hypothesis is that the electromagnetic field is causing damage to the virion membrane (and therefore changing spike protein orientation) rendering the virus unable to attach and infect host cells. Towards examining this hypothesis, our group employed nanosecond pulsed electric fields (nsPEFs) as a surrogate to radiofrequency (RF) exposure to enable exploration of dose response thresholds of electric field-induced viral membrane damage. In summary, Bovine coronavirus (BCoV) was exposed, in suspension, to mono and bipolar 600-ns pulsed electric fields (nsPEFs) at two amplitudes (12.5 and 25 kV/cm) and pulse numbers [0 (sham), 1, 5, 10, 100, and 1000] at a 1 Hz (Hz) repetition rate. The temperature rise immediately after exposure(s) was measured using thermocouples to differentiate effects of the electric field (E-field) and heating (i.e., the thermal gradient). Inactivation of BCoV was evaluated by infecting HRT-18G host cells and assessing differences in virus infectivity days after exposure. Our results show that 600 nsPEFs, both bipolar and monopolar, can reduce the infectivity of coronaviruses at various amplitudes, pulse numbers, and pulse polarity. Interestingly, we observed that bipolar exposures appeared to be more efficient at lower exposure intensities than monopolar pulses. Future work should focus on experiments to identify the mechanism underlying nsPEF-induced viral inactivation.
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Affiliation(s)
- Jody C Cantu
- General Dynamics Information Technology, JBSA Fort Sam Houston, San Antonio, TX, USA
| | - Ronald A Barnes
- Air Force Research Laboratory, 711Th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, USA
| | - Bryan M Gamboa
- Air Force Research Laboratory, 711Th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, USA
| | - Allen S Keister
- Air Force Research Laboratory, 711Th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, USA
| | - Ibtissam Echchgadda
- Air Force Research Laboratory, 711Th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, USA.
| | - Bennett L Ibey
- Air Force Research Laboratory, 711Th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, USA
- Air Force Office of Scientific Research, Air Force Research Laboratory, Arlington, VA, USA
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Song YC, Liu SJ, Lee HJ, Liao HC, Liu CT, Wu MY, Yen HR. Humoral and cellular immunity in three different types of COVID-19 vaccines against SARS-CoV-2 variants in a real-world data analysis. J Microbiol Immunol Infect 2023; 56:705-717. [PMID: 37055256 PMCID: PMC10065040 DOI: 10.1016/j.jmii.2023.03.008] [Citation(s) in RCA: 4] [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: 08/08/2022] [Revised: 12/07/2022] [Accepted: 03/23/2023] [Indexed: 04/03/2023]
Abstract
BACKGROUND An effective vaccine response is currently a critical issue in the control of COVID-19. Little is known about humoral and cellular immunity comparing protein-based vaccine with other types of vaccines. The relevance of basal immunity to antibody production is also unknown. METHODS Seventy-eight individuals were enrolled in the study. The primary outcome were the level of spike-specific antibodies and neutralizing antibodies measured by ELISA. Secondary measures included memory T cells and basal immunity estimated by flow cytometry and ELISA. Correlations for all parameters were calculated using the nonparametric Spearman correlation method. RESULTS We observed that two doses of mRNA-based Moderna mRNA-1273 (Moderna) vaccine produced the highest total spike-binding antibody and neutralizing ability against the wild-type (WT), Delta, and Omicron variants. The protein-based MVC-COV1901 (MVC) vaccine developed in Taiwan produced higher spike-binding antibodies against Delta and Omicron variants and neutralizing ability against the WT strain than the adenovirus-based AstraZeneca-Oxford AZD1222 (AZ) vaccine. Moderna and AZ vaccination produced more central memory T cells in PBMC than the MVC vaccine. However, the MVC vaccine had the lowest adverse effects compared to the Moderna and AZ vaccines. Surprisingly, the basal immunity represented by TNF-α, IFN-γ, and IL-2 prior to vaccination was negatively correlated with the production of spike-binding antibodies and neutralizing ability. CONCLUSION This study compared memory T cells, total spike-binding antibody levels, and neutralizing capacity against WT, Delta, and Omicron variants between the MVC vaccine and the widely used Moderna and AZ vaccines, which provides valuable information for future vaccine development strategies.
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Affiliation(s)
- Ying-Chyi Song
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Chinese Medicine Research Center, China Medical University, Taichung, Taiwan; Research Center of Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Shih-Jen Liu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan; Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hui-Ju Lee
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Chinese Medicine Research Center, China Medical University, Taichung, Taiwan; Research Center of Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Hung-Chun Liao
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan; Department of Life Sciences, National Tsing Hua University, Hsinchu, Taiwan
| | - Chuan-Teng Liu
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan; Research Center of Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Mei-Yao Wu
- Research Center of Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Post-Baccalaureate Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hung-Rong Yen
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan; Research Center of Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan; Department of Laboratory Science and Biotechnology, Asia University, Taichung, Taiwan.
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Rajabi A, Mogheiseh A, Nazifi S, Ahrari-Khafi M, Dehghanian A, Vesal N, Bigham-Sadegh A. Effect of direct therapeutic ultrasound exposure of ovaries on histopathology, inflammatory response, and oxidative stress in dogs. BMC Vet Res 2023; 19:88. [PMID: 37474957 PMCID: PMC10360222 DOI: 10.1186/s12917-023-03657-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Accepted: 07/14/2023] [Indexed: 07/22/2023] Open
Abstract
BACKGROUND This research was designed to evaluate the effects of therapeutic ultrasound waves on ovarian germinal tissue and inflammatory cytokines (interleukin-6 (IL-6), IL1β, tumor necrosis factor-α (TNF-α)), acute phase proteins (serum amyloid A (SAA), C reactive protein (CRP)) and oxidative stress (total antioxidant capacity (TAC), and malondialdehyde (MDA)) in dogs. Twenty-six clinically healthy adult mix-breed female dogs were aligned into three groups. Laparotomy was performed in control (n = 6) and treatment (T5, n = 10; T10, n = 10) groups. The ultrasonic exposure of ovaries in treatment groups was performed during laparotomy by round motions of the therapeutic ultrasonic transducer on both ovaries (1 MHz frequency, 1.5 W⁄cm2) for 5 min in the T5 group and for 10 min in the T10 group. Blood samples were collected from the jugular vein into a plain glass tube on days 0 (before laparotomy), 3, 6, and 9 after surgery. All control and treatment groups' dogs were ovariectomized for histological evaluation on day 60 after laparotomy or laparotomy + ultrasound exposure. RESULTS Direct exposure of ovaries with therapeutic ultrasound waves induced inflammation and oxidative stress comparison with the control group. Histopathological evaluation of treated ovaries with ultrasound waves indicated a decreased number of primordial follicles (ovarian reserve) and oocyte preservation scores compared with ovaries in the control group. CONCLUSIONS These changes may cause subfertility in the long term. It seems that inflammatory response and oxidative stress are factors in the permanent damage of ovarian tissue.
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Affiliation(s)
- Arian Rajabi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Fars, Iran
| | - Asghar Mogheiseh
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Fars, Iran
| | - Saeed Nazifi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Fars, Iran
| | | | - AmirReza Dehghanian
- Department of Pathobiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Fars, Iran
| | - Nasser Vesal
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Fars, Iran
| | - Amin Bigham-Sadegh
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Fars, Iran
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Yamaguchi K, Shimizu H, Takahashi K, Nagatomo T, Nishimura T, Matsumoto M, Koshizuka T, Mori H, Inoue N, Torikai M. Characterization of epitopes of human monoclonal antibodies against cytomegalovirus glycoprotein B for neutralization and antibody-dependent phagocytosis. Vaccine 2023; 41:4497-4507. [PMID: 37321896 DOI: 10.1016/j.vaccine.2023.06.003] [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: 02/25/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 06/17/2023]
Abstract
As congenital cytomegalovirus (CMV) infections are the leading non-genetic cause of sensorineural hearing loss and significant neurological disabilities in children, the development of CMV vaccines should be given the highest public health priority. Although MF59-adjuvanted glycoprotein B (gB) vaccine (gB/MF59) is safe and immunogenic, its efficacy in terms of protection from natural infection was around 50 % in clinical trials. Although gB/MF59 induced high antibody titers, anti-gB antibodies contributed little to the neutralization of infection. Recent studies have found that non-neutralizing functions, including antibody-dependent phagocytosis of virions and virus-infected cells, are likely to play important roles in pathogenesis and vaccine design. Previously, we isolated human monoclonal antibodies (MAbs) that reacted with the trimeric form of gB ectodomain and found that preferential epitopes for neutralization were present on Domains (Doms) I and II of gB, while there were abundant non-neutralizing antibodies targeting Dom IV. In this study, we analyzed the phagocytosis activities of these MAbs and found the following: 1) MAbs effective for phagocytosis of the virions targeted Doms I and II, 2) the MAbs effective for phagocytosis of the virions and those of virus-infected cells were generally distinct, and 3) the antibody-dependent phagocytosis showed little correlation with neutralizing activities. Taking account of the frequency and levels of neutralization and phagocytosis, incorporation of the epitopes on Doms I and II into developing vaccines is considered desirable for the prevention of viremia.
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Affiliation(s)
| | | | - Keita Takahashi
- Microbiology & Immunology, Gifu Pharmaceutical University, Japan
| | | | | | | | - Tetsuo Koshizuka
- Microbiology & Immunology, Gifu Pharmaceutical University, Japan
| | - Hiroaki Mori
- Kikuchi Research Center, KM Biologics Co., Ltd, Japan
| | - Naoki Inoue
- Microbiology & Immunology, Gifu Pharmaceutical University, Japan.
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Mousa H, Thanassoulas A, Zughaier SM. ApoM binds endotoxin contributing to neutralization and clearance by High Density Lipoprotein. Biochem Biophys Rep 2023; 34:101445. [PMID: 36915826 PMCID: PMC10006442 DOI: 10.1016/j.bbrep.2023.101445] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023] Open
Abstract
Background HDL possesses anti-inflammatory properties, however, the exact mechanism is not fully understood. Endotoxin is a potent inducers of TLR4 signaling, leading to inflammatory mediators' release. It has been estimated that TLR4 recognizes about 5% of circulating lipopolysaccharide whereas 95% is cleared by plasma lipoproteins, mainly HDL. ApoM is required for HDL biogenesis and 95% of plasma ApoM is found associated with HDL, both are significantly reduced during sepsis. Aim The aim of this study is to investigate whether ApoM binds endotoxin and contributes to anti-inflammatory activity of HDL. Methods Isothermal Titration Calorimetry (ITC) was used to determine the binding of ultrapure E. coli LPS to the recombinant ApoM protein. Purified human HDL and recombinant ApoM was used to investigate LPS neutralization using human and murine macrophages and computational simulation was performed. Result ApoM shows high affinity for E. coli LPS, forming 1:1 complexes with Kd values below 1 μΜ, as revealed by ITC. The binding process is strongly exothermic and enthalpy-driven (ΔrH = -36.5 kJ/mol), implying the formation of an extensive network of interactions between ApoM and LPS in the bound state. Computational simulation also predicted high-affinity binding between ApoM and E. coli LPS and the best scoring models showed E. coli LPS docking near the calyx of ApoM without blocking the pocket. The biological significance of this interaction was further demonstrated in macrophages where purified HDL neutralized an E. coli LPS effect and significantly reduced TNFα release from human THP-1 cells. Conclusion ApoM binds LPS to facilitate endotoxin neutralization and clearance by HDL.
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Affiliation(s)
- Hanaa Mousa
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Angelos Thanassoulas
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha, P.O. Box 2713, Qatar
| | - Susu M Zughaier
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha, P.O. Box 2713, Qatar
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Liu YQ, Song QW, Mo CR, Yu WW, Hu CY. Effect of neutralization treatment on properties of chitosan/bamboo leaf flavonoids/nano-metal oxide composite films and application of films in antioxidation of rapeseed oil. Int J Biol Macromol 2023; 242:124951. [PMID: 37211071 DOI: 10.1016/j.ijbiomac.2023.124951] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/24/2023] [Accepted: 05/16/2023] [Indexed: 05/23/2023]
Abstract
Neutralization treatment improved the slow-release antioxidant food packaging function of chitosan (CS)/bamboo leaf flavone (BLF)/nano-metal oxides composite films. The film cast from the CS composite solution neutralized by KOH solution had good thermal stability. The elongation at break of the neutralized CS/BLF film was increased by about 5 times, which provided the possibility for its packaging application. After 24 h of soaking in different pH solutions, the unneutralized films swelled severely and even dissolved, while the neutralized films maintained the basic structure with a small degree of swelling, and the release trend of BLF conformed to the logistic function (R2 ≥ 0.9186). The films had a good ability to resist free radicals, which was related to the release amount of BLF and the pH of the solution. The antimicrobial neutralized CS/BLF/nano-ZnO film, like the nano-CuO and Fe3O4 films, were effective in inhibiting the increase in peroxide value and 2-thiobarbituric acid induced by thermal oxygen oxidation of rapeseed oil and had no toxicity to normal human gastric epithelial cells. Therefore, the neutralized CS/BLF/nano-ZnO film is likely to become an active food packaging material for oil-packed food, which can prolong the shelf life of packaged food.
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Affiliation(s)
- Yi-Qi Liu
- Department of Food Science & Engineering, Jinan University, Huangpu West Avenue 601, Guangzhou City 510632, Guangdong, China
| | - Qiao-Wei Song
- Packaging Engineering Institute, Jinan University, Qianshan Road 206, Zhuhai, Guangdong 519070, China
| | - Chun-Ru Mo
- Department of Food Science & Engineering, Jinan University, Huangpu West Avenue 601, Guangzhou City 510632, Guangdong, China
| | - Wen-Wen Yu
- Department of Food Science & Engineering, Jinan University, Huangpu West Avenue 601, Guangzhou City 510632, Guangdong, China
| | - Chang-Ying Hu
- Department of Food Science & Engineering, Jinan University, Huangpu West Avenue 601, Guangzhou City 510632, Guangdong, China.
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Frackiewicz A, Kalaska B, Miklosz J, Mogielnicki A. The methods for removal of direct oral anticoagulants and heparins to improve the monitoring of hemostasis: a narrative literature review. Thromb J 2023; 21:58. [PMID: 37208753 DOI: 10.1186/s12959-023-00501-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 05/10/2023] [Indexed: 05/21/2023] Open
Abstract
The assessment of hemostasis is necessary to make suitable decisions on the management of patients with thrombotic disorders. In some clinical situations, for example, during thrombophilia screening, the presence of anticoagulants in sample makes diagnosis impossible. Various elimination methods may overcome anticoagulant interference. DOAC-Stop, DOAC-Remove and DOAC Filter are available methods to remove direct oral anticoagulants in diagnostic tests, although there are still reports on their incomplete efficacy in several assays. The new antidotes for direct oral anticoagulants - idarucizumab and andexanet alfa - could be potentially useful, but have their drawbacks. The necessity to remove heparins is also arising as heparin contamination from central venous catheter or therapy with heparin disturbs the appropriate hemostasis assessment. Heparinase and polybrene are already present in commercial reagents but a fully-effective neutralizer is still a challenge for researchers, thus promising candidates remain in the research phase.
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Affiliation(s)
| | - Bartlomiej Kalaska
- Department of Pharmacodynamics, Medical University of Bialystok, Bialystok, Poland.
| | - Joanna Miklosz
- Department of Pharmacodynamics, Medical University of Bialystok, Bialystok, Poland
| | - Andrzej Mogielnicki
- Department of Pharmacodynamics, Medical University of Bialystok, Bialystok, Poland
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Dhandapani A, Iqbal J, Kumar RN, Bhardwaj A, Shukla D, Raman RS, Prasad SVL, Murthy BMS. Characterization of fine particulate matter water-soluble inorganic ions and estimation of aerosol acidity at three COALESCE network sites - Mysuru, Bhopal, and Mesra - in India. Environ Sci Pollut Res Int 2023; 30:69241-69257. [PMID: 37133667 DOI: 10.1007/s11356-023-27032-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 04/11/2023] [Indexed: 05/04/2023]
Abstract
The study was carried out to understand the chemical, spatiotemporal characteristics of water-soluble inorganic ions (WSIIs), their association with PM2.5 mass, and aerosol acidity in three COALESCE (carbonaceous aerosol emissions, source apportionment, and climate impacts) network sites of India (Mesra - Eastern India, Bhopal - Central India and Mysuru - Southern India). Alternate-day 24-h integrated bulk PM2.5 samples were collected during 2019 along with on-site meteorological parameters. Annual average PM2.5 concentrations were 67 ± 46 µg m-3, 54 ± 47 µg m-3, and 30 ± 24 µg m-3 at Mesra, Bhopal, and Mysuru, respectively. PM2.5 concentrations exceeded the annual mean (40 µg m-3) recommended by the National Ambient Air Quality Standards (NAAQS) at Mesra and Bhopal. WSIIs existed in PM2.5 mass at Mesra (50.5%), Bhopal (39.6%), and Mysuru (29.2%). SO42-, NO3-, and NH4+ (SNA) were major secondary inorganic ions in total WSIIs, with an annual average of 88.4% in Mesra and 82.0% in Bhopal 78.4% in Mysuru. Low NO3-/SO42- ratios annually at Mesra (0.41), Bhopal (0.44), and Mysuru (0.24) indicated that stationary sources dominated vehicular emissions (1.0). Aerosol acidity varied from region to region and season to season depending on the presence of NH4+, the dominant counter-ion to neutralize anions. Aerosols were near-neutral or alkaline at all three sites, except during the pre-monsoon season in Mysuru. An assessment of neutralization pathways for major anions [SO42- + NO3-] suggests that they mainly existed as sulfate and nitrate salts such as ammonium sulfate ((NH4)2SO4) and ammonium bisulfate (NH4HSO4) in conjunction with ammonium nitrate (NH4NO3).
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Affiliation(s)
- Abisheg Dhandapani
- Department of Civil and Environmental Engineering, Birla Institute of Technology, Mesra, Ranchi, 835215, Jharkhand, India
| | - Jawed Iqbal
- Department of Civil and Environmental Engineering, Birla Institute of Technology, Mesra, Ranchi, 835215, Jharkhand, India
| | - Radhakrishnan Naresh Kumar
- Department of Civil and Environmental Engineering, Birla Institute of Technology, Mesra, Ranchi, 835215, Jharkhand, India.
| | - Ankur Bhardwaj
- Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Deeksha Shukla
- Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Ramya Sunder Raman
- Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
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Iwaki M, Kenri T, Senoh M. An ELISA system for tetanus toxoid potency tests: An alternative to lethal challenge. Biologicals 2023; 82:101681. [PMID: 37130447 DOI: 10.1016/j.biologicals.2023.101681] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/27/2023] [Accepted: 04/24/2023] [Indexed: 05/04/2023] Open
Abstract
For a long time, a widely used method for tetanus toxoid (Ttd) potency has been the challenge test, in which animals are immunized and then challenged with tetanus toxin in lethal or non-lethal way. In the context of animal welfare, an alternative is desired because the method causes unsustainable distress to animals. We aimed to replace the system for describing test results, in which scores are assigned to symptoms exhibited by challenged animals, with scores assigned to antibody ELISA titers in immunized mouse sera. The potency values and confidence intervals calculated by the absorbance score system were equivalent to those calculated by the symptom score system. We also attempted to utilize the raw ELISA absorbance instead of the assigned absorbance score and obtained similar results. ELISA may serve as an alternative to the lethal challenge for Ttd potency tests, not only in Japan but also in other countries in which mouse challenge tests are employed.
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Affiliation(s)
- Masaaki Iwaki
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan; Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, Tokyo, Japan.
| | - Tsuyoshi Kenri
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan.
| | - Mitsutoshi Senoh
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan.
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Xia S, Xiao W, Zhu X, Liao S, Guo J, Zhou J, Xiao S, Fang P, Fang L. Porcine deltacoronavirus resists antibody neutralization through cell-to-cell transmission. Emerg Microbes Infect 2023; 12:2207688. [PMID: 37125733 DOI: 10.1080/22221751.2023.2207688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Porcine deltacoronavirus (PDCoV) is an emerging enteric coronavirus that has been reported to infect a variety of animals and even humans. Cell-cell fusion has been identified as an alternative pathway for the cell-to-cell transmission of certain viruses, but the ability of PDCoV to exploit this transmission model, and the relevant mechanisms, have not been fully elucidated. Herein, we provide evidence that cell-to-cell transmission is the main mechanism supporting PDCoV spread in cell culture and that this efficient spread model is mediated by spike glycoprotein-driven cell-cell fusion. We found that PDCoV efficiently spread to non-susceptible cells via cell-to-cell transmission, and demonstrated that functional receptor porcine aminopeptidase N and cathepsins in endosomes are involved in the cell-to-cell transmission of PDCoV. Most importantly, compared with non-cell-to-cell infection, the cell-to-cell transmission of PDCoV was resistant to neutralizing antibodies and immune sera that potently neutralized free viruses. Taken together, our study revealed key characteristics of the cell-to-cell transmission of PDCoV and provided new insights into the mechanism of PDCoV infection.
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Affiliation(s)
- Sijin Xia
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Wenwen Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xuerui Zhu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Shusen Liao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Jiahui Guo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Junwei Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Puxian Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
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Sharma R, Shukla S, Singh U, Gupta S, Jain A. Effect of time, temperature and pH on Mycobacterium tuberculosis culture positivity of gastric aspirate: An experimental study. Indian J Tuberc 2023; 70:190-196. [PMID: 37100576 DOI: 10.1016/j.ijtb.2022.04.009] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 04/28/2022] [Indexed: 04/28/2023]
Abstract
BACKGROUND The culture of gastric aspirate (GA) has been used for bacteriological confirmation of pulmonary tuberculosis in children and patients who are unable to expectorate. Sodium bicarbonate neutralization of gastric aspirates is commonly recommended to increase culture positivity. We aim to study Mycobacterium tuberculosis (MTB) culture positivity of GA collected from confirmed case of pulmonary tuberculosis after storing it at different temperature, pH & time. METHODS GA specimens from 865 patients of either sex predominately non-expectorating children/adults with suspected pulmonary TB were collected. Gastric lavage was performed in the morning after an overnight fasting (at least 6hrs fasting). The GA specimens were tested by CBNAAT (GeneXpert) and AFB microscopy & those who were positive on CBNAAT were further processed with MTB culture on Growth Indicator Tube (MGIT™) culture. pH neutralized and non-neutralized CBNAAT positive GA specimens were culture within 2 hours of collection and 24 hours after storage at 4 °C & room temperature. RESULTS MTB was detected in 6.8% of collected GA specimens by CBNAAT. Culture positivity of neutralized GA specimens when processed within 2 hours of collection, was higher compared to paired non-neutralized GA specimens. Neutralized GA specimens had higher contamination rate than non-neutralized GA specimens. Storage of GA specimens at $Deg C had better culture yield than those stored at room temperature. CONCLUSION Early neutralization of acid in Gastric aspirate (GA) is essential for better culture positivity of M. tuberculosis (MTB). If there is a delay in processing GA, it should be kept at 4 °C after neutralization; however, positivity decreases with time.
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Affiliation(s)
- Rajeev Sharma
- Department of Microbiology, King George's Medical University, Lucknow, UP, 226003, India
| | - Suruchi Shukla
- Department of Microbiology, King George's Medical University, Lucknow, UP, 226003, India
| | - Urmila Singh
- Department of Microbiology, King George's Medical University, Lucknow, UP, 226003, India
| | - Sarika Gupta
- Department of Pediatrics, King George's Medical University, Lucknow, UP, 226003, India
| | - Amita Jain
- Department of Microbiology, King George's Medical University, Lucknow, UP, 226003, India.
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Bhattacharya M, Chatterjee S, Lee SS, Chakraborty C. Therapeutic applications of nanobodies against SARS-CoV-2 and other viral infections: Current update. Int J Biol Macromol 2023; 229:70-80. [PMID: 36586649 PMCID: PMC9797221 DOI: 10.1016/j.ijbiomac.2022.12.284] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/15/2022] [Accepted: 12/25/2022] [Indexed: 12/30/2022]
Abstract
In the last two years, the world encountered the SARS-CoV-2 virus, which is still dominating the population due to the absence of a viable treatment. To eradicate the global pandemic, scientists, doctors, and researchers took an exceptionally significant initiative towards the development of effective therapeutics to save many lifes. This review discusses about the single-domain antibodies (sdAbs), also called nanobodies, their structure, and their types against the infections of dreadful SARS-CoV-2 virus. A precise description highlights the nanobodies and their therapeutic application against the other selected viruses. It aims to focus on the extraordinary features of these antibodies compared to the conventional therapeutics like mAbs, convalescent plasma therapy, and vaccines. The stable structure of these nanobodies along with the suitable mechanism of action also confers greater resistance to the evolving variants with numerous mutations. The nanobodies developed against SARS-CoV-2 and its mutant variants have shown the greater neutralization potential than the primitive ones. Engineering of these specialized antibodies by modern biotechnological approaches will surely be more beneficial in treating this COVID-19 pandemic along with certain other viral infections.
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Affiliation(s)
- Manojit Bhattacharya
- Department of Zoology, Fakir Mohan University, Vyasa Vihar, Balasore 756020, Odisha, India
| | - Srijan Chatterjee
- Institute for Skeletal Aging & Orthopaedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Sang-Soo Lee
- Institute for Skeletal Aging & Orthopaedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Chiranjib Chakraborty
- Department of Biotechnology, School of Life Science and Biotechnology, Adamas University, Kolkata, West Bengal 700126, India.
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Ren Y, Cao X, Wu P, Li L. Experimental insights into the formation of secondary minerals in acid mine drainage-polluted karst rivers and their effects on element migration. Sci Total Environ 2023; 858:160076. [PMID: 36356774 DOI: 10.1016/j.scitotenv.2022.160076] [Citation(s) in RCA: 5] [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: 08/05/2022] [Revised: 11/02/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
Acid mine drainage (AMD) threatens the water quality and safety of karst river water (KRW), and the formation of secondary iron or aluminum-bearing minerals during the mixing of AMD with KRW plays a crucial role in the migration of elements. However, the variations in the mineralogical, morphological and elemental compositions of secondary minerals and their influences on the migration of elements during AMD-KRW mixing have not been systematically studied. In this study, we mixed different proportions of AMD and KRW in a laboratory experiment to simulate seasonal hydrological conditions in a river to understand the major and trace elemental distributions in the mixed water and in precipitates and we discuss the formation process for the secondary minerals. The results showed that AMD can lead to a decrease in pH and DO and an increase in heavy metals and rare earth elements (REEs) in KRW. With the biological or chemical oxidation of Fe2+, Fe3+ combines with SO42- to form schwertmannite or hydrolyzes to form Fe(OH)3(s) and FeOOH(s), accompanied by the formation of amorphous Al hydroxide, resulting in a decrease in pH and an increase in Eh. Schwertmannite had strong adsorption and coprecipitation effects on Mn, Cr, Cu and As, so the adsorption and coprecipitation effects of schwertmannite on REEs were inhibited, while the migration of REEs were mainly affected by Al hydroxides. Therefore, after the AMD mixes with KRW, it not only causes severe water and sediment pollution but also adsorbs and enriches high concentrations of heavy metals in the secondary minerals formed during the mixing process, creating a major ecological hazard that requires further attention.
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Affiliation(s)
- Yeye Ren
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 500025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang 500025, China
| | - Xingxing Cao
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 500025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang 500025, China.
| | - Pan Wu
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 500025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang 500025, China
| | - Linwei Li
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 500025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang 500025, China
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Gómez-Robles J, Rey-Suárez P, Pereañez JA, Lomonte B, Núñez V. Antibodies against a single fraction of Micrurus dumerilii venom neutralize the lethal effect of whole venom. Toxicol Lett 2023; 374:77-84. [PMID: 36528173 DOI: 10.1016/j.toxlet.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
The coralsnake Micrurus dumerilii (Elapidae) is reported to cause envenomings of medical importance. Previous studies characterized the protein composition of its venom, with phospholipase A2 (PLA2) proteins the most abundant. However, it is unknown which venom components are responsible for its lethal toxicity. Fractionation of M. dumerilii venom from Colombia was carried out using RP-HPLC and each fraction was screened for lethal effect in mice at a dose of 20 μg by intraperitoneal route. Results showed that only one fraction, F9, was lethal. This fraction displayed PLA2 activity, induced indirect hemolysis in vitro, as well as edema and myotoxicity in vivo. SDS-PAGE of unreduced F9 evidenced two bands of 8 and 15 kDa, respectively, consistent with the detection of proteins with masses of 13,217.77 Da, 7144.06 Da, and 7665.55 Da. Tryptic digestion of F9 followed by nESI-MS/MS revealed peptide sequences matching proteins of the three-finger toxin (3FTx) and PLA2 families. Immunization of a rabbit with F9 proteins elicited antibody titers up to 1:10,000 by ELISA. After serum fractionation with caprylic acid, the obtained IgG was able to neutralize the lethal effect of the complete venom of M. dumerilii using a challenge of 2 ×LD50 at the IgG/venom ratio of 50:1 (w/w). In conclusion, present results show that the lethal effect of M. dumerilii venom in mice is mainly driven by one fraction which contains 3FTx and PLA2 proteins. The antibodies produced against this fraction cross-recognized other PLA2s and neutralized the lethal effect of whole M. dumerilii venom, pointing out to the potential usefulness of F9 as a relevant antigen for improving current coral snake antivenoms.
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Muniz EG, Sano-Martins IS, Saraiva MDGG, Monteiro WM, Magno ES, Oliveira SS. Biological characterization of the Bothrops brazili snake venom and its neutralization by Brazilian Bothrops antivenom produced by the Butantan Institute. Toxicon 2023; 223:107010. [PMID: 36586491 DOI: 10.1016/j.toxicon.2022.107010] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
We evaluated the ability of the Bothrops antivenom produced by the Butantan Institute to neutralize the lethal, hemorrhagic, myotoxic and phospholipase A2 activities induced by B. brazili venom from Rondônia state, Brazil, and verified its cross-reactivity against this venom. This antivenom neutralized the cited biological activities. It also showed cross-reactivity with this venom, and preferentially recognized components with a relative mass above 66 kDa. Our results suggest that Brazilian Bothrops antivenom can be used in B. brazili envenomation in this region.
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Affiliation(s)
- Emiro G Muniz
- Department of Epidemiology and Public Health, Dr Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, 69040-000, Brazil
| | - Ida S Sano-Martins
- Pathophysiology Laboratory, Butantan Institute, São Paulo, 05503-900, Brazil
| | - Maria das Graças G Saraiva
- Department of Epidemiology and Public Health, Dr Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, 69040-000, Brazil; Research Department, Dr Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, 69040-000, Brazil
| | - Wuelton Marcelo Monteiro
- Teaching and Research Directorate, Dr Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, 69040-000, Brazil
| | - Evela S Magno
- Department of Epidemiology and Public Health, Dr Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, 69040-000, Brazil
| | - Sâmella S Oliveira
- Research Management, Hospital Foundation of Hematology and Hemotherapy of Amazonas, Manaus, 69050-001, Brazil; Teaching and Research Center, Francisca Mendes Heart Hospital Foundation, Manaus, 69097-720, Brazil.
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Susik J, Ptasznik S. The first stage of refining of post-fermentation corn oil with a high content of free fatty acids and phytosterols - Comparison of neutralisation by an ion-exchange resin without solvent and base neutralisation. Food Res Int 2023; 164:112302. [PMID: 36737900 DOI: 10.1016/j.foodres.2022.112302] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 11/29/2022] [Accepted: 12/03/2022] [Indexed: 12/13/2022]
Abstract
Post-fermentation crude corn oil obtained as a by-product in the production of bioethanol from maize grains is characterized by a very high content of free fatty acids. Refining of post-fermentation corn oil will give a product that will be different from the refined oil obtained by extracting oil from corn germs. From the point of view of refining vegetable oils, the neutralisation of this oil is the most important process. Anionic ion-exchange resin was used in the research in a way to avoid the use of harmful organic solvents and a comparatively standard method of neutralising free fatty acids based on the use of a sodium hydroxide solution. Ion-exchange resin can be used in the processes of neutralising vegetable oil with an average content of free fatty acids, then the oil is neutralised in miscela. In the research, no organic solvent was used, but to reduce the flow resistance, a system based on an adjustable reduced pressure in the range of 300-50 mbar was used, to maintain a constant contact time of the oil with the resin in each cycle. The aim of the research was to obtain neutral oil with a high content of biologically active substances such as phytosterols and carotenoids. Both methods showed a reduction of free fatty acids up to 93-96 % and a similar refining loss of 18-19 %. The use of an ion-exchange resin allowed to obtain an oil in which the phytosterol content increased by 5 % for β-sitosterol, by 6.3 % for ϭ5-avenasterol, and the carotenoid content was reduced by 35 %. An increase in the number of fatty acids, such as 18:1 cis-oleic acid and 18:2 cis-linoleic, was observed.
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Affiliation(s)
- Justyna Susik
- Waclaw Dąbrowski Institute of Agriculture and Food Biotechnology - State Research Institute, 02-532 Warszawa, Poland; Komagra Sp. z o.o., 43-100 Warsaw, Poland.
| | - Stanisław Ptasznik
- Waclaw Dąbrowski Institute of Agriculture and Food Biotechnology - State Research Institute, 02-532 Warszawa, Poland
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Fan Q, Wang L, Fu Y, Wang Z. Impacts of coexisting mineral on crystallinity and stability of Fe(II) oxidation products: Implications for neutralization treatment of acid mine drainage. J Hazard Mater 2023; 442:130060. [PMID: 36182886 DOI: 10.1016/j.jhazmat.2022.130060] [Citation(s) in RCA: 1] [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: 02/09/2022] [Revised: 09/14/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
The neutralization treatment of acid mine drainage involves the oxidation of Fe(II), but little is known about the effects of co-existing minerals on the oxidation and hydrolysis of Fe(II) to iron oxides. Here we investigated the transformation of fresh and heated Fe(II) oxidation coprecipitates, which were synthesized in the presence and the absence of five co-existing minerals (montmorillonite, kaolin, quartz (SiO2), aluminium oxide (Al2O3) and calcium carbonate (CaCO3)). In the FeSO4 system with montmorillonite or kaolin, the formation of lepidocrocite was inhibited with the increase of clay mineral contents. In the same system, heated coprecipitates of montmorillonite were mainly comprised of amorphous ferrihydrite and its transformation was retarded by the excess montmorillonite. In the FeCl2 system with SiO2, Al2O3 or CaCO3, akaganeite formation was inhibited with the increase in the corresponding mineral contents. In the same system, goethite formation was blocked by either CaCO3 or Al2O3 and the growth of lepidocrocite was inhibited by CaCO3 or SiO2. However, magnetite formation was enhanced by addition of CaCO3. These findings are important for predicting products of abiotic Fe(II) oxidation during the neutralization of acid mine drainage and for better understanding the transformation of amorphous iron oxides in the complicated environmental matrix.
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Affiliation(s)
- Qingya Fan
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Lingli Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Yu Fu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhaohui Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; State Key Laboratory of Mineral Processing, Beijing 102628, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, China.
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Del Rosario JMM, da Costa KAS, Temperton NJ. Pseudotyped Viruses for Influenza. Adv Exp Med Biol 2023; 1407:153-173. [PMID: 36920696 DOI: 10.1007/978-981-99-0113-5_8] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
We have developed an influenza hemagglutinin (HA) pseudotype (PV) library encompassing all influenza A (IAV) subtypes from HA1-HA18, influenza B (IBV) subtypes (both lineages), representative influenza C (ICV), and influenza D (IDV) viruses. These influenza HA (or hemagglutinin-esterase fusion (HEF) for ICV and IDV) pseudotypes have been used in a pseudotype microneutralization assay (pMN), an optimized luciferase reporter assay, that is highly sensitive and specific for detecting neutralizing antibodies against influenza viruses. This has been an invaluable tool in detecting the humoral immune response against specific hemagglutinin or hemagglutinin-esterase fusion proteins for IAV to IDV in serum samples and for screening antibodies for their neutralizing abilities. Additionally, we have also produced influenza neuraminidase (NA) pseudotypes for IAV N1-N9 subtypes and IBV lineages. We have utilized these NA-PV as surrogate antigens in in vitro assays to assess vaccine immunogenicity. These NA PV have been employed as the source of neuraminidase enzyme activity in a pseudotype enzyme-linked lectin assay (pELLA) that is able to measure neuraminidase inhibition (NI) titers of reference antisera, monoclonal antibodies, and postvaccination sera. Here we show the production of influenza HA, HEF, and NA PV and their employment as substitutes for wild-type viruses in influenza serological and neutralization assays. We also introduce AutoPlate, an easily accessible web app that can analyze data from pMN and pELLA quickly and efficiently, plotting inhibition curves and calculating half-maximal concentration (IC50) neutralizing antibody titers. These serological techniques coupled with user-friendly analysis tools are faster, safer, inexpensive alternatives to classical influenza assays while also offering the reliability and reproducibility to advance influenza research and make it more accessible to laboratories around the world.
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Affiliation(s)
- Joanne Marie M Del Rosario
- Viral Pseudotype Unit, Medway School of Pharmacy, University of Kent and Greenwich at Medway, Chatham, UK
| | - Kelly A S da Costa
- Viral Pseudotype Unit, Medway School of Pharmacy, University of Kent and Greenwich at Medway, Chatham, UK
| | - Nigel J Temperton
- Viral Pseudotype Unit, Medway School of Pharmacy, University of Kent and Greenwich at Medway, Chatham, UK.
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Holtkamp C, Schöler L, Anastasiou OE, Brune B, Fessmann K, Elsner C, Möhlendick B, Čiučiulkaitė I, Dudda M, Trilling M, Dittmer U, Spors J, Le-Trilling VTK. Antibody responses elicited by mRNA vaccination in firefighters persist six months and correlate inversely with age and directly with BMI. Heliyon 2023; 9:e12746. [PMID: 36597483 PMCID: PMC9801692 DOI: 10.1016/j.heliyon.2022.e12746] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 08/18/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022] Open
Abstract
Knowledge regarding the sustainability of immune responses after COVID-19 vaccination is important, e.g., to decide whom and when to booster. Thus, we analyzed antibody titers in firefighters six months after vaccination with the mRNA-based vaccine Comirnaty. SARS-CoV-2 spike-binding antibodies (bAb) were quantified and compared to peak responses determined in healthcare workers (HCW). For the firefighters, neutralizing antibodies (nAb) were also analyzed. Six months after the second vaccine dose, all analyzed firefighters had detectable bAb, and 91% exhibited nAb titers above 1:16. However, actual titers six months after vaccination were over 12-fold lower than in the HCW control group four weeks after vaccination. bAb and nAb responses showed a significant correlation, and age correlated inversely with antibody responses. Unexpectedly, participants with a body mass index over 25 had higher neutralization titers after six months. All participants with very low neutralization titers were offered booster vaccination. The booster vaccination improved the extent and sustainability of antibody responses.
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Affiliation(s)
- Caroline Holtkamp
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Lara Schöler
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Olympia E. Anastasiou
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Bastian Brune
- Emergency Medical Services, Fire Brigade Essen, Essen, Germany,Department of Trauma, Hand, and Reconstructive Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Kai Fessmann
- Emergency Medical Services, Fire Brigade Essen, Essen, Germany,Department of Trauma, Hand, and Reconstructive Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Carina Elsner
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Birte Möhlendick
- Institute of Pharmacogenetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ieva Čiučiulkaitė
- Institute of Pharmacogenetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Marcel Dudda
- Emergency Medical Services, Fire Brigade Essen, Essen, Germany,Department of Trauma, Hand, and Reconstructive Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Mirko Trilling
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ulf Dittmer
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Jörg Spors
- Emergency Medical Services, Fire Brigade Essen, Essen, Germany
| | - Vu Thuy Khanh Le-Trilling
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany,Corresponding author. University Hospital Essen, University of Duisburg-Essen, Institute for Virology, Virchowstr. 179, 45147 Essen, Germany
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Welch SR, Ritter JM, Schuh AJ, Genzer SC, Sorvillo TE, Harmon JR, Coleman-McCray JD, Jain S, Shrivastava-Ranjan P, Seixas JN, Estetter LB, Fair PS, Towner JS, Montgomery JM, Albariño CG, Spiropoulou CF, Spengler JR. Tissue replication and mucosal swab detection of Sosuga virus in Syrian hamsters in the absence of overt tissue pathology and clinical disease. Antiviral Res 2023; 209:105490. [PMID: 36521633 PMCID: PMC10999129 DOI: 10.1016/j.antiviral.2022.105490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/29/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022]
Abstract
Human infection with Sosuga virus (SOSV), a recently discovered pathogenic paramyxovirus, has been reported in one individual to date. No animal models of disease are currently available for SOSV. Here, we describe initial characterization of experimental infection in Syrian hamsters, including kinetics of virus dissemination and replication, and the corresponding clinical parameters, immunological responses, and histopathology. We demonstrate susceptibility of hamsters to infection in the absence of clinical signs or significant histopathologic findings in tissues.
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Affiliation(s)
- Stephen R Welch
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Jana M Ritter
- Infectious Diseases Pathology Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Amy J Schuh
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Sarah C Genzer
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Teresa E Sorvillo
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Jessica R Harmon
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - JoAnn D Coleman-McCray
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Shilpi Jain
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Punya Shrivastava-Ranjan
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Josilene Nascimento Seixas
- Infectious Diseases Pathology Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Lindsey B Estetter
- Infectious Diseases Pathology Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Pamela S Fair
- Infectious Diseases Pathology Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Jonathan S Towner
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Joel M Montgomery
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - César G Albariño
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Christina F Spiropoulou
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA
| | - Jessica R Spengler
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, USA.
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47
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Wu X, Nie J, Wang Y. Pseudotyped Virus for Papillomavirus. Adv Exp Med Biol 2023; 1407:85-103. [PMID: 36920693 DOI: 10.1007/978-981-99-0113-5_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Papillomavirus is difficult to culture in vitro, which limits its related research. The development of pseudotyped virus technology provides a valuable research tool for virus infectivity research, vaccine evaluation, infection inhibitor evaluation, and so on. Depending on the application fields, different measures have been developed to generate various kinds of pseudotyped papillomavirus. L1-based and L2-based HPV vaccines should be evaluated using different pseudotyped virus system. Pseudotyped papillomavirus animal models need high-titer pseudotyped virus and unique handling procedure to generate robust results. This paper reviewed the development, optimization, standardization, and application of various pseudotyped papillomavirus methods.
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48
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Wu J, Huang W, Wang Y. Pseudotyped Viruses for Phlebovirus. Adv Exp Med Biol 2023; 1407:253-64. [PMID: 36920701 DOI: 10.1007/978-981-99-0113-5_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Rift Valley fever virus (RVFV) is a member of the Phlebovirus genus, one of the 20 genera in the Phenuiviridae family. RVFV causes disease in animals and humans and is transmitted by sandflies or ticks. However, research into RVFV is limited by the requirement for biosafety level 3 (BSL-3) containment. Pseudotyped virus overcomes this limitation as it can be handled in a BSL-2 environment. Pseudotyped RVFV possesses an identical envelope protein structure to that of the authentic virus, simulating the same process of receptor binding and membrane fusion to host cells. Pseudotyped phleboviruses are therefore useful tools to study the infection mechanism of these viruses and for the screening of inhibitory drugs and the development of therapeutic monoclonal antibodies.
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49
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Ning T, Huang W, Min L, Yang Y, Liu S, Xu J, Zhang N, Xie SA, Zhu S, Wang Y. Pseudotyped Viruses for Orthohantavirus. Adv Exp Med Biol 2023; 1407:229-252. [PMID: 36920700 DOI: 10.1007/978-981-99-0113-5_12] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Orthohantaviruses, members of the Orthohantavirus genus of Hantaviridae family of the Bunyavirales order, are enveloped, negative-sense, single-stranded, tripartite RNA viruses. They are emerging zoonotic pathogens carried by small mammals including rodents, moles, shrews, and bats and are the etiologic agents of hemorrhagic fever with renal syndrome (HFRS) and hantavirus cardiopulmonary syndrome (HCPS) among humans. With the characteristics of low biological risk but strong operability, a variety of pseudotyped viruses have been constructed as alternatives to authentic orthohantaviruses to help delineate the roles of host factors in viral entry and other virus-host interactions, to assist in deciphering mechanisms of immune response and correlates of protection, to enhance our understanding of viral antigenic property, to characterize viral entry inhibitors, and to be developed as vaccines. In this chapter, we will discuss the general property of orthohantavirus, construction of pseudotyped orthohantaviruses based on different packaging systems, and their current applications.
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Affiliation(s)
- Tingting Ning
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Weijin Huang
- Division of HIV/AIDS and Sexually Transmitted Virus Vaccines, National Institutes for Food and Drug Control (NIFDC), Beijing, China
| | - Li Min
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Yi Yang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Si Liu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Junxuan Xu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Nan Zhang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Si-An Xie
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China
| | - Shengtao Zhu
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Disease, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Disease, Beijing, China.
| | - Youchun Wang
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China. .,Institute of Medical Biology, Chinese Academy of Medicine Sciences & Peking Union Medical College, Kunming, China.
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50
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Schulte C, Khayenko V, Maric HM. Peptide Microarray-Based Protein Interaction Studies Across Affinity Ranges: Enzyme Stalling, Cross-Linking, Depletion, and Neutralization. Methods Mol Biol 2023; 2578:143-159. [PMID: 36152285 DOI: 10.1007/978-1-0716-2732-7_10] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
While an ever-increasing number of protein-protein interactions were studied by peptide microarrays with great success, array-based investigations of transiently binding proteins, such as HDACs, and precise binding quantification, remained challenging. Here, we present an updated protocol for the preparation and use of peptide microarrays including the necessary adjustments for simple semi-quantitative and precise measurements across affinity ranges. This procedure describes the mass spectrometric controlled preparation of peptide microarrays in μSPOT format, and their application in binding profiling of recombinant, as well as endogenous, native proteins. We further highlight how cross-linking, blocking, and enzyme stalling can be leveraged to enhance sensitivity and describe how in situ on-chip binding neutralization can enhance the predictive value and robustness of the binding readout. Finally, we included examples for the integration of precise biophysical binding readouts that complement the traditional array-based binding assays.
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Affiliation(s)
- Clemens Schulte
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Wuerzburg, Wuerzburg, Germany
| | - Vladimir Khayenko
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Wuerzburg, Wuerzburg, Germany
| | - Hans Michael Maric
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Wuerzburg, Wuerzburg, Germany.
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