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Calado CRC. Antigenic and conserved peptides from diverse Helicobacter pylori antigens. Biotechnol Lett 2022; 44:535-545. [PMID: 35277779 PMCID: PMC8916697 DOI: 10.1007/s10529-022-03238-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 02/14/2022] [Indexed: 12/20/2022]
Abstract
Since the revolutionary finding of Helicobacter pylori as a common bacterial infection, that a high research effort for its eradication has been conducted. Epitope based-vaccine presents advantages over protein-based, as they can be designed to contain epitopes from diverse proteins, therefore, more easily representing the immune-variability of the bacterial population, while minimizing the toxicity associated to some whole proteins. In the present work, an iterative method, to design antigenic and conserved B-epitopes from diverse virulent factors of H. pylori, was established. The method considered the trade-off between epitopes antigenicity and conservation among the bacterial population. For the method validation, five virulent factors from H. pylori were selected. From each virulent factor, two epitopes were predicted, each with twelve residues of aminoacids. The corresponding ten peptides were synthesised and evaluated by enzyme-linked immunosorbent assay using polyclonal antibodies raised against a specific H. pylori strain. All ten peptides were recognised by the antibodies and were consequently antigenic and conserved. This result could strongly contribute to the design of a multivalent epitope-based vaccine, representing the immunogenetic variability within the bacterial population, leading to a sustained and effective immunogenic protection.
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Affiliation(s)
- Cecília R C Calado
- CIMOSM - Centro de Investigação em Modelação e Otimização de Sistemas Multifuncionais, ISEL - Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro 1, 1959-007, Lisboa, Portugal.
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2
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Keikha M, Eslami M, Yousefi B, Ghasemian A, Karbalaei M. Potential antigen candidates for subunit vaccine development against
Helicobacter pylori
infection. J Cell Physiol 2019; 234:21460-21470. [PMID: 31188484 DOI: 10.1002/jcp.28870] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Masoud Keikha
- Antimicrobial Resistance Research Center, Bu‐Ali Research Institute Mashhad University of Medical Sciences Mashhad Iran
- Department of Microbiology and Virology, School of Medicine Mashhad University of Medical Sciences Mashhad Iran
| | - Majid Eslami
- Cancer Research Center Semnan University of Medical Sciences Semnan Iran
| | - Bahman Yousefi
- Department of Immunology Semnan University of Medical Sciences Semnan Iran
| | - Abdolmajid Ghasemian
- Department of Biology, Tehran Central Branch Islamic Azad University Tehran Iran
| | - Mohsen Karbalaei
- Department of Microbiology and Virology, School of Medicine Mashhad University of Medical Sciences Mashhad Iran
- Department of Microbiology and Virology, School of Medicine Jiroft University of Medical Sciences Jiroft Iran
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Kaminski ZJ, Relich I, Konieczna I, Kaca W, Kolesinska B. Cross-Reactivity of Polyclonal Antibodies againstCanavalia ensiformis(Jack Bean) Urease andHelicobacter pyloriUrease Subunit A Fragments. Chem Biodivers 2017; 15. [DOI: 10.1002/cbdv.201700444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/16/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Zbigniew Jerzy Kaminski
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 94-050 Lodz Poland
| | - Inga Relich
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 94-050 Lodz Poland
| | - Iwona Konieczna
- Department of Microbiology; Jan Kochanowski University; Swietokrzyska 11 25-406 Kielce Poland
| | - Wieslaw Kaca
- Department of Microbiology; Jan Kochanowski University; Swietokrzyska 11 25-406 Kielce Poland
| | - Beata Kolesinska
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 94-050 Lodz Poland
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Expression and Antigenic Evaluation of Helicobacter pylori UreB Fragment. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.41645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Effect of Different Adjuvants on Protection and Side-Effects Induced by Helicobacter suis Whole-Cell Lysate Vaccination. PLoS One 2015; 10:e0131364. [PMID: 26115373 PMCID: PMC4482594 DOI: 10.1371/journal.pone.0131364] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/01/2015] [Indexed: 02/07/2023] Open
Abstract
Helicobacter suis (H. suis) is a widespread porcine gastric pathogen, which is also of zoonotic importance. The first goal of this study was to investigate the efficacy of several vaccine adjuvants (CpG-DNA, Curdlan, Freund's Complete and Incomplete, Cholera toxin), administered either subcutaneously or intranasally along with H. suis whole-cell lysate, to protect against subsequent H. suis challenge in a BALB/c infection model. Subcutaneous immunization with Freund's complete (FC)/lysate and intranasal immunization with Cholera toxin (CT)/lysate were shown to be the best options for vaccination against H. suis, as determined by the amount of colonizing H. suis bacteria in the stomach, although adverse effects such as post-immunization gastritis/pseudo-pyloric metaplasia and increased mortality were observed, respectively. Therefore, we decided to test alternative strategies, including sublingual vaccine administration, to reduce the unwanted side-effects. A CCR4 antagonist that transiently inhibits the migration of regulatory T cells was also included as a new adjuvant in this second study. Results confirmed that immunization with CT (intranasally or sublingually) is among the most effective vaccination protocols, but increased mortality was still observed. In the groups immunized subcutaneously with FC/lysate and CCR4 antagonist/lysate, a significant protection was observed. Compared to the FC/lysate immunized group, gastric pseudo-pyloric metaplasia was less severe or even absent in the CCR4 antagonist/lysate immunized group. In general, an inverse correlation was observed between IFN-γ, IL-4, IL-17, KC, MIP-2 and LIX mRNA expression and H. suis colonization density, whereas lower IL-10 expression levels were observed in partially protected animals.
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Vermoote M, Flahou B, Pasmans F, Ducatelle R, Haesebrouck F. Protective efficacy of vaccines based on the Helicobacter suis urease subunit B and γ-glutamyl transpeptidase. Vaccine 2013; 31:3250-6. [PMID: 23707444 DOI: 10.1016/j.vaccine.2013.05.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 03/18/2013] [Accepted: 05/10/2013] [Indexed: 01/01/2023]
Abstract
Helicobacter suis causes gastric lesions in pigs and humans. This study aimed to evaluate the protective efficacy of immunization with combinations of the H. suis urease subunit B (UreB) and γ-glutamyl transpeptidase (GGT), both recombinantly expressed in Escherichia coli (rUreB and rGGT, respectively). Mice were intranasally immunized with rUreB, rGGT or a combination of both proteins, administered simultaneously or sequentially. Control groups consisted of non-immunized and non-challenged mice (negative controls), sham-immunized and H. suis-challenged mice (sham-immunized controls), and finally, H. suis whole-cell lysate-immunized and H. suis challenged mice. Cholera toxin was used as mucosal adjuvant. All immunizations induced a significant reduction of gastric H. suis colonization, which was least pronounced in the groups immunized with rGGT and rUreB only. Consecutive immunization with rGGT followed by rUreB and immunization with the bivalent vaccine improved the protective efficacy compared to immunization with single proteins, with a complete clearance of infection observed in 50% of the animals. Immunization with whole-cell lysate induced a similar reduction of gastric bacterial colonization compared to rGGT and rUreB in combinations. Gastric lesions, however, were less pronounced in mice immunized with combinations of rUreB and rGGT compared to mice immunized with whole-cell lysate. In conclusion, vaccination with a combination of rGGT and rUreB protected mice against a subsequent H. suis infection and was not associated with severe post-vaccination gastric inflammation, indicating that it may be a promising method for control of H. suis infections.
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Affiliation(s)
- Miet Vermoote
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
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Ameri Shah Reza M, Mousavi Gargari SL, Rasooli I, Jalali Nadoushan M, Ebrahimizadeh W. Inhibition of H. pylori colonization and prevention of gastritis in murine model. World J Microbiol Biotechnol 2012; 28:2513-9. [PMID: 22806157 DOI: 10.1007/s11274-012-1059-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 04/14/2012] [Indexed: 01/15/2023]
Abstract
Helicobacter pylori is a Gram-negative spiral bacterium that colonizes human gastric mucosa causing infection. In this study aiming at inhibition of H. pylori infection we made an attempt to evaluate immunogenicity of the total (UreC) and C-terminal (UreCc) fragments of H. pylori urease. Total UreC and its C-terminal fragment were expressed in E. coli. Recombinant proteins were analyzed by SDS-PAGE and western blot and then purified by Ni-NTA affinity chromatography. Female C57BL6/j mice were immunized with the purified proteins (UreC and UreCc). Antibody titers from isolated sera were measured by ELISA. Immunized mice were then challenged by oral gavage with live H. pylori Sydney strain SS1. Total of 109 CFU were inoculated into stomach of immunized and unimmunized healthy mice three times each at one day interval. Eight weeks after the last inoculation, the blood sample was collected and the serum antibody titer was estimated by ELISA. Stomach tissues from control and experimental animal groups were studied histopathologically. UreC and UreCc yielded recombinant proteins of 61 and 31 kDa respectively. ELIZA confirmed establishment of immunity and the antibodies produced thereby efficiently recognized H. pylori and inhibited its colonization in vivo. Pathological analysis did not reveal established infection in immunized mice challenged with H. pylori. The results support the idea that UreC and UreCc specific antibodies contribute to protection against H. pylori infections.
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Li HX, Mao XH, Shi Y, Ma Y, Wu YN, Zhang WJ, Luo P, Yu S, Zhou WY, Guo Y, Wu C, Guo G, Zou QM. Screening and identification of a novel B-cell neutralizing epitope from Helicobacter pylori UreB. Vaccine 2008; 26:6945-9. [PMID: 18948159 DOI: 10.1016/j.vaccine.2008.09.089] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Accepted: 09/24/2008] [Indexed: 01/10/2023]
Abstract
Urease plays a crucial role in the survival and pathogenesis of Helicobacter pylori (H. pylori), and antibody neutralizing the urease activity may be implicated for the protection against H. pylori infection. Previously, a neutralizing monoclonal antibody (MAb) 6E6 against UreB of H. pylori was developed. In this work, we try to identify the B-cell epitope recognized by neutralizing MAb 6E6. Following screening a series of truncated proteins of UreB, an epitope was primarily localized in the aa 200-230 of UreB. Subsequently, we screened the overlapping synthetic peptides covering the aa 200-230 and identified a novel B-cell epitope (U(211-225), IEAGAIGFKIHEDWG) that was recognized by specific MAb 6E6. The newly identified epitope may help understanding of the protective immunity against H. pylori and be implicated for vaccine development.
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Affiliation(s)
- Hai-Xia Li
- Department of Clinical Microbiology and Clinical Immunology, The Third Military Medical University, Chongqing 400038, People's Republic of China
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Jones KR, Cha JH, Merrell DS. Who's Winning the War? Molecular Mechanisms of Antibiotic Resistance in Helicobacter pylori. CURRENT DRUG THERAPY 2008; 3:190-203. [PMID: 21765819 DOI: 10.2174/157488508785747899] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The ability of clinicians to wage an effective war against many bacterial infections is increasingly being hampered by skyrocketing rates of antibiotic resistance. Indeed, antibiotic resistance is a significant problem for treatment of diseases caused by virtually all known infectious bacteria. The gastric pathogen Helicobacter pylori is no exception to this rule. With more than 50% of the world's population infected, H. pylori exacts a tremendous medical burden and represents an interesting paradigm for cancer development; it is the only bacterium that is currently recognized as a carcinogen. It is now firmly established that H. pylori infection is associated with diseases such as gastritis, peptic and duodenal ulceration and two forms of gastric cancer, gastric adenocarcinoma and mucosa-associated lymphoid tissue (MALT) lymphoma. With such a large percentage of the population infected, increasing rates of antibiotic resistance are particularly vexing for a treatment regime that is already fairly complicated; treatment consists of two antibiotics and a proton pump inhibitor. To date, resistance has been found to all primary and secondary lines of antibiotic treatment as well as to drugs used for rescue therapy.
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Affiliation(s)
- Kathleen R Jones
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
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Morihara F, Hifumi E, Yamada M, Nishizono A, Uda T. Therapeutic effects of molecularly designed antigen UREB138 for mice infected withHelicobacter pylori. Biotechnol Bioeng 2008; 100:634-43. [DOI: 10.1002/bit.21804] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Abstract
Helicobacter pylori infection is highly prevalent worldwide and is an important cause of gastritis, peptic ulcer disease, gastric mucosa-associated lymphoid tissue lymphoma (MALToma), and gastric adenocarcinoma. Infection is usually acquired during childhood and tends to persist unless treated. Because eradication requires treatment with multidrug regimens, prevention of initial infection by a suitable vaccine is attractive. Although immunization with H pylori protein subunits has been encouraging in animals, similar vaccine trials in humans have shown adjuvant-related adverse effects and only moderate effectiveness. Newer immunization approaches (use of DNA, live vectors, bacterial ghosts, and microspheres) are being developed. Several questions about when and whom to vaccinate will need to be appropriately answered, and a cost-effective vaccine production and delivery strategy will have to be useful for developing countries. For this review, we searched MEDLINE using the Medical Subject Heading (MeSH) terms Helicobacter pylori and vaccines for articles in English from 1990 to 2007.
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Affiliation(s)
- Kanishtha Agarwal
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN 55905, USA
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Frazer IH, Lowy DR, Schiller JT. Prevention of cancer through immunization: Prospects and challenges for the 21st century. Eur J Immunol 2008; 37 Suppl 1:S148-55. [PMID: 17972339 DOI: 10.1002/eji.200737820] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Persistent infection by several microbial agents is responsible for at least 15% of cancer globally, including most cancers of the liver, stomach, and cervix. The recent development of vaccines that can prevent infection and premalignant disease caused by human papillomaviruses (HPV), which cause virtually all cases of cervical cancer as well as some other cancers, has focused renewed attention on infection control as a means of reducing the global cancer burden. For vaccines to prevent cancer-causing infection with hepatitis C virus, Helicobacter pylori, or Epstein Barr virus, new vaccine technologies to induce more effective protective responses are required. For the two available cancer control vaccines, designed to prevent infection with HPV and hepatitis B virus, the major challenge is to promote effective vaccine deployment through education programs and increased affordability/accessibility for underserved populations, particularly in the developing world, where the cancer burden attributable to infection by these two viruses is greatest.
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Affiliation(s)
- Ian H Frazer
- Diamantina Institute for Cancer Immunology and Metabolic Medicine, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia.
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