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Gomes LGR, Dutra JCF, Profeta R, Dias MV, García GJY, Rodrigues DLN, Goés Neto A, Aburjaile FF, Tiwari S, Soares SC, Azevedo V, Jaiswal AK. Systematic review of reverse vaccinology and immunoinformatics data for non-viral sexually transmitted infections. AN ACAD BRAS CIENC 2023; 95:e20230617. [PMID: 38055447 DOI: 10.1590/0001-3765202320230617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/27/2023] [Indexed: 12/08/2023] Open
Abstract
Sexually Transmitted Infections (STIs) are a public health burden rising in developed and developing nations. The World Health Organization estimates nearly 374 million new cases of curable STIs yearly. Global efforts to control their spread have been insufficient in fulfilling their objective. As there is no vaccine for many of these infections, these efforts are focused on education and condom distribution. The development of vaccines for STIs is vital for successfully halting their spread. The field of immunoinformatics is a powerful new tool for vaccine development, allowing for the identification of vaccine candidates within a bacterium's genome and allowing for the design of new genome-based vaccine peptides. The goal of this review was to evaluate the usage of immunoinformatics in research focused on non-viral STIs, identifying fields where research efforts are concentrated. Here we describe gaps in applying these techniques, as in the case of Treponema pallidum and Trichomonas vaginalis.
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Affiliation(s)
- Lucas Gabriel R Gomes
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Joyce C F Dutra
- Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Microbiologia, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Rodrigo Profeta
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Mariana V Dias
- Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Glen J Y García
- Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Bioinformática, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Diego Lucas N Rodrigues
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
- Universidade Federal de Minas Gerais (UFMG), Escola de Veterinária, Departamento de Medicina Veterinária, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Aristóteles Goés Neto
- Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Microbiologia, Laboratório de Biologia Molecular e Computacional de Fungos, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Flávia F Aburjaile
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
- Universidade Federal de Minas Gerais (UFMG), Escola de Veterinária, Departamento de Medicina Veterinária, Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Sandeep Tiwari
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
- Universidade Federal da Bahia, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-115 Salvador, BA, Brazil
- Universidade Federal da Bahia, Instituto de Ciências da Saúde, Av. Reitor Miguel Calmon, s/n, Vale do Canela, 40110-902 Salvador, BA, Brazil
| | - Siomar C Soares
- Universidade Federal do Triângulo Mineiro (UFTM), Instituto de Ciências Biológicas e Naturais, Departamento de Microbiologia, Imunologia, e Parasitologia, Rua Vigário Carlos, 100, Abadia, 38025-180 Uberaba, MG, Brazil
| | - Vasco Azevedo
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Arun K Jaiswal
- Programa de Pós-Graduação em Bioinformática, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Laboratório de Genética Celular e Molecular (LGCM), Av. Pres. Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
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Duncan SA, Sahu R, Dixit S, Singh SR, Dennis VA. Suppressors of Cytokine Signaling (SOCS)1 and SOCS3 Proteins Are Mediators of Interleukin-10 Modulation of Inflammatory Responses Induced by Chlamydia muridarum and Its Major Outer Membrane Protein (MOMP) in Mouse J774 Macrophages. Mediators Inflamm 2020; 2020:7461742. [PMID: 32684836 PMCID: PMC7333066 DOI: 10.1155/2020/7461742] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/10/2020] [Indexed: 12/26/2022] Open
Abstract
The immunopathology of chlamydial diseases is exacerbated by a broad-spectrum of inflammatory mediators, which we reported are inhibited by IL-10 in macrophages. However, the chlamydial protein moiety that induces the inflammatory mediators and the mechanisms by which IL-10 inhibits them are unknown. We hypothesized that Chlamydia major outer membrane protein (MOMP) mediates its disease pathogenesis, and the suppressor of cytokine signaling (SOCS)1 and SOCS3 proteins are mediators of the IL-10 inhibitory actions. Our hypothesis was tested by exposing mouse J774 macrophages to chlamydial stimulants (live Chlamydia muridarum and MOMP) with and without IL-10. MOMP significantly induced several inflammatory mediators (IL-6, IL-12p40, CCL5, CXCL10), which were dose-dependently inhibited by IL-10. Chlamydial stimulants induced the mRNA gene transcripts and protein expression of SOCS1 and SOCS3, with more SOCS3 expression. Notably, IL-10 reciprocally regulated their expression by reducing SOCS1 and increasing SOCS3. Specific inhibitions of MAPK pathways revealed that p38, JNK, and MEK1/2 are required for inducing inflammatory mediators as well as SOCS1 and SOCS3. Chlamydial stimulants triggered an M1 pro-inflammatory phenotype evidently by an enhanced nos2 (M1 marker) expression, which was skewed by IL-10 towards a more M2 anti-inflammatory phenotype by the increased expression of mrc1 and arg1 (M2 markers) and the reduced SOCS1/SOCS3 ratios. Neutralization of endogenously produced IL-10 augmented the secretion of inflammatory mediators, reduced SOCS3 expression, and skewed the chlamydial M1 to an M2 phenotype. Inhibition of proteasome degradation increased TNF but decreased IL-10, CCL5, and CXCL10 secretion by suppressing SOCS1 and SOCS3 expressions and dysregulating their STAT1 and STAT3 transcription factors. Our data show that SOCS1 and SOCS3 are regulators of IL-10 inhibitory actions, and underscore SOCS proteins as therapeutic targets for IL-10 control of inflammation for Chlamydia and other bacterial inflammatory diseases.
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Affiliation(s)
- Skyla A. Duncan
- Center for NanoBiotechnology Research (CNBR), Department of Biological Sciences, Alabama State University, 1627 Harris Way, Montgomery, AL 36104, USA
| | - Rajnish Sahu
- Center for NanoBiotechnology Research (CNBR), Department of Biological Sciences, Alabama State University, 1627 Harris Way, Montgomery, AL 36104, USA
| | - Saurabh Dixit
- Center for NanoBiotechnology Research (CNBR), Department of Biological Sciences, Alabama State University, 1627 Harris Way, Montgomery, AL 36104, USA
| | - Shree R. Singh
- Center for NanoBiotechnology Research (CNBR), Department of Biological Sciences, Alabama State University, 1627 Harris Way, Montgomery, AL 36104, USA
| | - Vida A. Dennis
- Center for NanoBiotechnology Research (CNBR), Department of Biological Sciences, Alabama State University, 1627 Harris Way, Montgomery, AL 36104, USA
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Hill AM, Salmond GPC. Microbial gas vesicles as nanotechnology tools: exploiting intracellular organelles for translational utility in biotechnology, medicine and the environment. MICROBIOLOGY (READING, ENGLAND) 2020; 166:501-509. [PMID: 32324529 PMCID: PMC7376271 DOI: 10.1099/mic.0.000912] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/21/2020] [Indexed: 12/12/2022]
Abstract
A range of bacteria and archaea produce gas vesicles as a means to facilitate flotation. These gas vesicles have been purified from a number of species and their applications in biotechnology and medicine are reviewed here. Halobacterium sp. NRC-1 gas vesicles have been engineered to display antigens from eukaryotic, bacterial and viral pathogens. The ability of these recombinant nanoparticles to generate an immune response has been quantified both in vitro and in vivo. These gas vesicles, along with those purified from Anabaena flos-aquae and Bacillus megaterium, have been developed as an acoustic reporter system. This system utilizes the ability of gas vesicles to retain gas within a stable, rigid structure to produce contrast upon exposure to ultrasound. The susceptibility of gas vesicles to collapse when exposed to excess pressure has also been proposed as a biocontrol mechanism to disperse cyanobacterial blooms, providing an environmental function for these structures.
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Affiliation(s)
- Amy M. Hill
- Department of Biochemistry, Tennis Court Road, University of Cambridge, Cambridge, CB2 1QW, UK
| | - George P. C. Salmond
- Department of Biochemistry, Tennis Court Road, University of Cambridge, Cambridge, CB2 1QW, UK
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Alkhidir AAI, Holland MJ, Elhag WI, Williams CA, Breuer J, Elemam AE, El Hussain KMK, Ournasseir MEH, Pickering H. Whole-genome sequencing of ocular Chlamydia trachomatis isolates from Gadarif State, Sudan. Parasit Vectors 2019; 12:518. [PMID: 31685017 PMCID: PMC6829945 DOI: 10.1186/s13071-019-3770-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 10/25/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Trachoma, caused by ocular Chlamydia trachomatis, is the leading infectious cause of blindness worldwide. Sudan first reported trachoma in the 1930s and has since been consistently endemic. Ocular C. trachomatis previously isolated from trachoma patients in Sudan in 1963 was antigenically identical to an isolate from Saudi Arabia (A/SA1). No contemporary ocular C. trachomatis whole genome sequences have been reported from Sudan. METHODS This study sequenced twenty ocular C. trachomatis isolates to improve understanding of pathogen diversity in North-East Africa and examine for genomic variation specific to Sudan, possibly related to the persistence of trachoma in surveyed communities. High quality, whole genome sequences were obtained from 12/20 isolates. RESULTS All isolates were serovar A and had tarP and trpA sequences typical of classical, ocular C. trachomatis isolates. The Sudanese isolates formed a closely related subclade within the T2-trachoma clade of C. trachomatis phylogeny distinct from geographically disparate ocular isolates, with little intra-population diversity. We found 333 SNPs that were conserved in Sudanese ocular isolates but rare compared to other ocular C. trachomatis populations, which were focused in two genomic loci (CTA0172-CTA0173 and CTA0482). CONCLUSIONS Limited intra-population diversity and geographical clustering of ocular C. trachomatis suggests minimal transmission between and slow diversification within trachoma-endemic communities. However, diversity may have been higher pre-treatment in these communities. Over-representation of Sudan-specific SNPs in three genes suggests they may have an impact on C. trachomatis growth and transmission in this population.
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Affiliation(s)
| | - Martin J Holland
- Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
| | - Wafa Ibrahim Elhag
- Faculty of Medical Laboratory Sciences, Al-Neelain University, Khartoum, Sudan
| | | | - Judith Breuer
- Division of Infection and Immunity, University College London, London, UK.,Microbiology, Virology, and Infection Control, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | | | | | | | - Harry Pickering
- Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
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Duncan SA, Dixit S, Sahu R, Martin D, Baganizi DR, Nyairo E, Villinger F, Singh SR, Dennis VA. Prolonged Release and Functionality of Interleukin-10 Encapsulated within PLA-PEG Nanoparticles. NANOMATERIALS 2019; 9:nano9081074. [PMID: 31357440 PMCID: PMC6723354 DOI: 10.3390/nano9081074] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/09/2019] [Accepted: 07/24/2019] [Indexed: 01/12/2023]
Abstract
Inflammation, as induced by the presence of cytokines and chemokines, is an integral part of chlamydial infections. The anti-inflammatory cytokine, interleukin (IL)-10, has been reported to efficiently suppress the secretion of inflammatory cytokines triggered by Chlamydia in mouse macrophages. Though IL-10 is employed in clinical applications, its therapeutic usage is limited due to its short half-life. Here, we document the successful encapsulation of IL-10 within the biodegradable polymeric nanoparticles of PLA-PEG (Poly (lactic acid)-Poly (ethylene glycol), to prolong its half-life. Our results show the encapsulated-IL-10 size (~238 nm), zeta potential (−14.2 mV), polydispersity index (0.256), encapsulation efficiency (~77%), and a prolonged slow release pattern up to 60 days. Temperature stability of encapsulated-IL-10 was favorable, demonstrating a heat capacity of up to 89 °C as shown by differential scanning calorimetry analysis. Encapsulated-IL-10 modulated the release of IL-6 and IL-12p40 in stimulated macrophages in a time- and concentration-dependent fashion, and differentially induced SOCS1 and SOCS3 as induced by chlamydial stimulants in macrophages. Our finding offers the tremendous potential for encapsulated-IL-10 not only for chlamydial inflammatory diseases but also biomedical therapeutic applications.
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Affiliation(s)
- Skyla A Duncan
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Saurabh Dixit
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Rajnish Sahu
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - David Martin
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Dieudonné R Baganizi
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Elijah Nyairo
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Francois Villinger
- New Iberia Research Center, University of Louisiana at Lafayette, 4401 W Admiral Doyle Drive, New Iberia, LA 70560, USA
| | - Shree R Singh
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA
| | - Vida A Dennis
- Center for NanoBiotechnology & Life Sciences Research, Department of Biological Sciences, Alabama State University, 915 South Jackson Street, Montgomery, AL 36104, USA.
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ZHang T, Li H, Lan X, ZHang CH, Yang ZH, Cao W, Fen N, Liu Y, Yan Y, Yasheng A, Ma X. The bioinformatics analyses reveal novel antigen epitopes in major outer membrane protein of Chlamydia trachomatis. Indian J Med Microbiol 2018; 35:522-528. [PMID: 29405144 DOI: 10.4103/ijmm.ijmm_17_251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE The aim of this study was to predict the T-cell and B-cell epitopes in major outer membrane protein (MOMP) of Chlamydia trachomatis (CT) by using online software and also to analyse the secondary structure of MOMP through bioinformatics tools. MATERIALS AND METHODS The predictions of secondary structure of MOMP protein were carried out using SOPMA software, and the prediction of B-cell epitopes in MOMP protein was carried out using IEDB and LEPS software, while the T-cell epitopes were predicted by the software of IEBD and SYFPEITHI. The predictions from the software were combined with MOMP protein characteristics, including surface features, hydrophilicity, flexibility, accessibility and plasticity, to analyse the common epitope areas' response by T-cells and B-cells. RESULTS In the secondary structure of CT MOMP, the alpha-helices accounted for 41.62% of total amino acid, while the beta sheets and random coil accounted for 19.80% and 32.49%, respectively. Predictions combined with MOMP protein surface features, hydrophilicity, flexibility, accessibility and plasticity were further characterised, and three high-score B-cell epitope areas were found as located in 24-31, 307-311 and 318-327 amino acids of MOMP protein, respectively; in the meanwhile, three high-score T-cell epitope areas were found in 234-236, 323-329 and 338-343 amino acids of MOMP using major histocompatibility complex (MHC) class I HLA-A 0201 restrictive T-cell epitope analyser. CONCLUSION We established the methods by using the biological information network technologies for looking the T-cell antigen epitopes and B-cell antigen epitopes in MOMP of CT, and three novel T-cell epitopes as well as three novel B-cell epitopes were identified in the current study. It provides important information for further studying the antigenicity of CT MOMP protein and also provides useful information for developing highly efficient subunit vaccines for CT.
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Affiliation(s)
- Tao ZHang
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Huijun Li
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Xi Lan
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University; Shenzhen Hospital of Southern Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - CHuntao ZHang
- College of Basic Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - ZHangsheng Yang
- Department of Microbiology and Immunologya and Pathology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Wenyan Cao
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Ning Fen
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Yumei Liu
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Yi Yan
- College of Basic Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Amanguli Yasheng
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
| | - Xiumin Ma
- State Key Laboratory Incubation Base of Xinjiang Major Diseases Research (2010DS890294) and Xinjiang Key Laboratory of Echinococcosis, First Affiliated Hospital of Xinjiang Medical University; College of Basic Medicine of Xinjiang Medical University, Urumqi, Xinjiang 830011, P.R. China
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Sharma M, Dash P, Sahoo PK, Dixit A. Th2-biased immune response and agglutinating antibodies generation by a chimeric protein comprising OmpC epitope (323–336) of Aeromonas hydrophila and LTB. Immunol Res 2017; 66:187-199. [DOI: 10.1007/s12026-017-8953-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Jiang P, Cai Y, Chen J, Ye X, Mao S, Zhu S, Xue X, Chen S, Zhang L. Evaluation of tandem Chlamydia trachomatis MOMP multi-epitopes vaccine in BALB/c mice model. Vaccine 2017; 35:3096-3103. [PMID: 28456528 DOI: 10.1016/j.vaccine.2017.04.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 03/31/2017] [Accepted: 04/12/2017] [Indexed: 11/29/2022]
Abstract
Chlamydia trachomatis (Ct), an obligate intracellular parasite, is the leading cause of bacterial sexually transmitted diseases worldwide. The best solution to control the spread of Ct is to develop safe and effective vaccines. However, an effective vaccine has not been developed due to some challenges such as selection of appropriate candidate antigens and an effective delivery system. In our previous study, we have developed a Ct vaccine that comprises a multi-epitope peptide of Ct major outer membrane protein (MOMP370-387) and Hepatitis B virus core antigen (HBcAg). The vaccine was evaluated in a murine model with chlamydial genital infection. The results indicated that Ct MOMP multi-epitope delivered by HBcAg could be an effective vaccine for the prevention of Ct. In this study, another two epitopes were selected from the MOMP protein and tandemly linked with MOMP370-387 to enhance the immunogenicity and the protective effect of the candidate vaccine. Our results revealed that both the immunogenicity and the protective effect of the tandem Ct MOMP multi-epitopes were much better than that of the single epitope. Therefore, vaccines based on the tandem Ct MOMP multi-epitopes could be more effective immune prophylactics to prevent Ct infection than the single epitope in murine model system.
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Affiliation(s)
- Pengfei Jiang
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Yiqi Cai
- Department of General Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Jun Chen
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Xiaoxian Ye
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Shanshan Mao
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Shanli Zhu
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Xiangyang Xue
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Shao Chen
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China
| | - Lifang Zhang
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, PR China.
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Sharma M, Dixit A. Immune response characterization and vaccine potential of a recombinant chimera comprising B-cell epitope of Aeromonas hydrophila outer membrane protein C and LTB. Vaccine 2016; 34:6259-6266. [PMID: 27832917 DOI: 10.1016/j.vaccine.2016.10.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/28/2016] [Accepted: 10/24/2016] [Indexed: 10/20/2022]
Abstract
Aeromonas hydrophila is one of the most virulent fish pathogens, causing colossal economic losses to the aquaculture industry annually. The absence of a safe and effective vaccine makes it very difficult to control this infection. Outer membrane proteins have been widely illustrated to confer protective immunity against a broad spectrum of gram negative bacteria. In the current study, we have analyzed the ability of B-cell epitopes of A. hydrophila's outer membrane protein C (OmpC) to confer protection against bacterial virulence. Bioinformatic algorithms were used to predict linear B-cell epitopes of OmpC and the corresponding nucleotide sequences were cloned in translational fusion with heat labile enterotoxin B subunit (LTB) of E. coli. Of the three recombinant LTB.epitope fusion proteins evaluated, antisera against the fusion protein comprising the epitope stretch of 143-175 amino acids gave maximum cross reactivity with the parent protein OmpC. The anti-fusion protein antisera contained both OmpC- and LTB-specific antibodies. The fusion proteins' LTB moiety retained its ability to bind to the GM1 ganglioside receptor, an essential requirement for its adjuvanicity. Antibody isotyping, cytokine ELISA, and cytokine array analysis revealed a Th2 skewed type immune response along with the presence of some relevant Th17 and Th1 cytokines involved in conferring protective immunity. Surface exposure of the epitope143-175 on live A. hydrophila membrane was investigated and validated using bacterial agglutination and flow cytometry analysis using anti-fusion protein antisera. Our results strongly support the potential of B-cell epitope143-175 of OmpC of A. hydrophila, in fusion with the LTB, as an effective and promising vaccine candidate against this bacterium.
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Affiliation(s)
- Mahima Sharma
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India
| | - Aparna Dixit
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India.
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Jiang P, Du W, Xiong Y, Lv Y, Feng J, Zhu S, Xue X, Chen S, Zhang L. Hepatitis B virus core antigen as a carrier for Chlamydia trachomatis MOMP multi-epitope peptide enhances protection against genital chlamydial infection. Oncotarget 2016; 6:43281-92. [PMID: 26657117 PMCID: PMC4791232 DOI: 10.18632/oncotarget.6533] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 11/26/2015] [Indexed: 12/26/2022] Open
Abstract
Chlamydia trachomatis (Ct) is the leading cause of sexually transmitted diseases worldwide. There is no safe and effective vaccine to control the spread of Ct. In development of Ct vaccine, selection of appropriate candidate antigens and an effective delivery system may be the main challenges. Multi-epitope of major outer membrane protein (MOMPm) is the most suitable candidate for a Ct vaccine, while hepatitis B virus core antigen (HBcAg) has unique advantages as vaccine delivery system. Therefore, in this study, we evaluated the immunogenicity and protective immune response of a novel candidate vaccine in a murine model of chlamydial genital infection. This candidate vaccine comprises MOMPm peptide delivered with HBcAg. Our results of Ct-specific serum IgG and secretory IgA assay, cytokine assay, and cytotoxic T-lymphocyte assay revealed that immunogenicity of the candidate vaccine was much better than that of the corresponding synthetic MOMPm peptide. Furthermore, the protective effect of the candidate vaccine was also shown much better than that of the synthetic peptide by calculating the isolation of Chlamydia from vaginal swabs and histopathological analysis. Taken together, our results indicate that HBcAg carrying Ct MOMPm could be an effective immune prophylactic for chlamydial infection.
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Affiliation(s)
- Pengfei Jiang
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Wangqi Du
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Yirong Xiong
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Yan Lv
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Juan Feng
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Shanli Zhu
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Xiangyang Xue
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Shao Chen
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
| | - Lifang Zhang
- Institute of Molecular Virology and Immunology, Department of Microbiology and Immunology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China
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11
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Genital Chlamydia trachomatis: understanding the roles of innate and adaptive immunity in vaccine research. Clin Microbiol Rev 2016; 27:346-70. [PMID: 24696438 DOI: 10.1128/cmr.00105-13] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Chlamydia trachomatis is the leading cause of bacterial sexually transmitted disease worldwide, and despite significant advances in chlamydial research, a prophylactic vaccine has yet to be developed. This Gram-negative obligate intracellular bacterium, which often causes asymptomatic infection, may cause pelvic inflammatory disease (PID), ectopic pregnancies, scarring of the fallopian tubes, miscarriage, and infertility when left untreated. In the genital tract, Chlamydia trachomatis infects primarily epithelial cells and requires Th1 immunity for optimal clearance. This review first focuses on the immune cells important in a chlamydial infection. Second, we summarize the research and challenges associated with developing a chlamydial vaccine that elicits a protective Th1-mediated immune response without inducing adverse immunopathologies.
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12
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Zhang L, Zeng Z, Hu C, Bellis SL, Yang W, Su Y, Zhang X, Wu Y. Controlled and targeted release of antigens by intelligent shell for improving applicability of oral vaccines. Biomaterials 2016; 77:307-19. [DOI: 10.1016/j.biomaterials.2015.11.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 11/06/2015] [Indexed: 12/31/2022]
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13
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Montanaro J, Inic-Kanada A, Ladurner A, Stein E, Belij S, Bintner N, Schlacher S, Schuerer N, Mayr UB, Lubitz W, Leisch N, Barisani-Asenbauer T. Escherichia coli Nissle 1917 bacterial ghosts retain crucial surface properties and express chlamydial antigen: an imaging study of a delivery system for the ocular surface. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:3741-54. [PMID: 26229437 PMCID: PMC4516183 DOI: 10.2147/dddt.s84370] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
To target chronic inflammatory ocular surface diseases, a drug delivery platform is needed that is safe, possesses immunomodulatory properties, and can be used either for drug delivery, or as a foreign antigen carrier. A new therapeutic approach that we have previously proposed uses nonliving bacterial ghosts (BGs) as a carrier-delivery system which can be engineered to carry foreign antigens and/or be loaded with therapeutic drugs. The parent strain chosen for development of our BG delivery system is the probiotic Escherichia coli strain Nissle 1917 (EcN), whose intrinsic properties trigger the innate immune system with the flagella and fimbriae used to attach and stimulate epithelial cells. In previous studies, we have shown that EcN BGs are safe for the ocular surface route, but evidence that EcN BGs retain flagella and fimbriae after transformation, has never been visually confirmed. In this study, we used different visualization techniques to determine whether flagella and fimbriae are retained on EcN BGs engineered either for drug delivery or as a foreign antigen carrier. We have also shown by immunoelectron microscopy that EcN retains two foreign antigens after processing to become EcN BGs. Furthermore, we demonstrated that BGs derived from EcN and expressing a foreign antigen attachment to conjunctival epithelial cells in vitro without causing reduced cell viability. These results are an important step in constructing a delivery system based on a nonliving probiotic that is suitable for use in ocular surface diseases pairing immunomodulation and targeted delivery.
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Affiliation(s)
- Jacqueline Montanaro
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Aleksandra Inic-Kanada
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Angela Ladurner
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Elisabeth Stein
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Sandra Belij
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Nora Bintner
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Simone Schlacher
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Nadine Schuerer
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | | | | | - Nikolaus Leisch
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
| | - Talin Barisani-Asenbauer
- Laura Bassi Centres of Expertise, OCUVAC - Centre of Ocular Inflammation and Infection, Centre for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
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14
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Sharma M, Dixit A. Identification and immunogenic potential of B cell epitopes of outer membrane protein OmpF of Aeromonas hydrophila in translational fusion with a carrier protein. Appl Microbiol Biotechnol 2015; 99:6277-91. [DOI: 10.1007/s00253-015-6398-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 01/08/2015] [Accepted: 01/08/2015] [Indexed: 01/10/2023]
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15
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Zhu S, Feng Y, Chen J, Lin X, Xue X, Chen S, Zhong X, Li W, Zhang L. Identification of linear B-cell epitopes within Tarp of Chlamydia trachomatis. J Pept Sci 2014; 20:916-22. [PMID: 25377871 DOI: 10.1002/psc.2689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 08/10/2014] [Accepted: 08/18/2014] [Indexed: 11/10/2022]
Abstract
Chlamydia trachomatis is one of the most prevalent sexually transmitted pathogens. There is currently no commercially available vaccine against C. trachomatis. Chlamydial translocated actin-recruiting phosphoprotein (Tarp) can induce cellular and humoral immune responses in murine models and has been regarded as a potential vaccine candidate. In this report, the amino acid sequence of Tarp was analyzed using computer-assisted techniques to scan B-cell epitopes, and six possible linear B-cell epitopes peptides (aa80-95, aa107-123, aa152-170, aa171-186, aa239-253 and aa497-513) with high predicted antigenicity and high conservation were investigated. Sera from mice immunized with these potential immunodominant peptides was analyzed by ELISA, which showed that epitope 152-170 elicited serum immunoglobulin G (IgG) response and epitope 171-186 elicited both serum IgG and mucosal secretory immunoglobulin A response. The response of immune sera of epitope 171-186 to endogenous Tarp antigen obtained from the Hela229 cells infected with C. trachomatis was confirmed by Western blot and indirect fluorescence assay. In addition, binding of the antibodies against epitope 171-186 to endogenous Tarp was further confirmed by competitive ELISA. Our results demonstrated that the putative epitope (aa171-186) was an immunodominant B-cell epitope of Tarp. If proven protective and safe, this epitope, in combination with other well-documented epitopes, might be included into a candidate epitope-based vaccine against C. trachomatis.
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Affiliation(s)
- Shanli Zhu
- Department of Microbiology and Immunology, Wenzhou Medical University, Wenzhou, 325000, China
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16
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Huang JH, Wen M, Tang LJ, Xie HL, Fu L, Liang YZ, Lu HM. Using random forest to classify linear B-cell epitopes based on amino acid properties and molecular features. Biochimie 2014; 103:1-6. [PMID: 24721579 DOI: 10.1016/j.biochi.2014.03.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 03/27/2014] [Indexed: 11/18/2022]
Abstract
Identification and characterization of B-cell epitopes in target antigens was one of the key steps in epitopes-driven vaccine design, immunodiagnostic tests, and antibody production. Experimental determination of epitopes was labor-intensive and expensive. Therefore, there was an urgent need of computational methods for reliable identification of B-cell epitopes. In current study, we proposed a novel peptide feature description method which combined peptide amino acid properties with chemical molecular features. Based on these combined features, a random forest (RF) classifier was adopted to classify B-cell epitopes and non-epitopes. RF is an ensemble method that uses recursive partitioning to generate many trees for aggregating the results; and it always produces highly competitive models. The classification accuracy, sensitivity, specificity, Matthews correlation coefficient (MCC), and area under the curve (AUC) values for current method were 78.31%, 80.05%, 72.23%, 0.5836, and 0.8800, respectively. These results showed that an appropriate combination of peptide amino acid features and chemical molecular features with a RF model could enhance the prediction performance of linear B-cell epitopes. Finally, a freely online service was available at http://sysbio.yznu.cn/Research/Epitopesprediction.aspx.
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Affiliation(s)
- Jian-Hua Huang
- Research Center of Modernization of Traditional Chinese Medicines, Central South University, Changsha 410083, PR China
| | - Ming Wen
- Research Center of Modernization of Traditional Chinese Medicines, Central South University, Changsha 410083, PR China
| | - Li-Juan Tang
- Criminal Investigation Detachment, Guilin Public Security Bureau, Guilin 541213, PR China
| | - Hua-Lin Xie
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, PR China
| | - Liang Fu
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, PR China
| | - Yi-Zeng Liang
- Research Center of Modernization of Traditional Chinese Medicines, Central South University, Changsha 410083, PR China.
| | - Hong-Mei Lu
- Research Center of Modernization of Traditional Chinese Medicines, Central South University, Changsha 410083, PR China.
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17
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Cambridge CD, Singh SR, Waffo AB, Fairley SJ, Dennis VA. Formulation, characterization, and expression of a recombinant MOMP Chlamydia trachomatis DNA vaccine encapsulated in chitosan nanoparticles. Int J Nanomedicine 2013; 8:1759-71. [PMID: 23690681 PMCID: PMC3656902 DOI: 10.2147/ijn.s42723] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Chlamydia trachomatis is a bacterial sexually transmitted infection affecting millions of people worldwide. Previous vaccination attempts have employed the recombinant major outer membrane protein (MOMP) of C. trachomatis nonetheless, with limited success, perhaps, due to stability, degradation, and delivery issues. In this study we cloned C. trachomatis recombinant MOMP DNA (DMOMP) and encapsulated it in chitosan nanoparticles (DMCNP) using the complex coacervation technique. Physiochemical characterizations of DMCNP included transmission and scanning electron microcopy, Fourier transform infrared and ultraviolet-visible spectroscopy, and zeta potential. Encapsulated DMOMP was 167–250 nm, with a uniform spherical shape and homogenous morphology, and an encapsulation efficiency > 90%. A slow release pattern of encapsulated DMOMP, especially in acidic solution, was observed over 7 days. The zeta potential of DMCNP was ~8.80 mV, which indicated that it was highly stable. Toxicity studies of DMCNP (25–400 μg/mL) to Cos-7 cells using the MTT assay revealed minimal toxicity over 24–72 hours with >90% viable cells. Ultra-violet visible (UV-vis) spectra indicated encapsulated DMOMP protection by chitosan, whereas agarose gel electrophoresis verified its protection from enzymatic degradation. Expression of MOMP protein in DMCNP-transfected Cos-7 cells was demonstrated via Western blotting and immunofluorescence microscopy. Significantly, intramuscular injection of BALB/c mice with DMCNP confirmed the delivery of encapsulated DMOMP, and expression of the MOMP gene transcript in thigh muscles and spleens. Our data show that encapsulation of DMOMP in biodegradable chitosan nanoparticles imparts stability and protection from enzymatic digestion, and enhances delivery and expression of DMOMP in vitro and in mice. Further investigations of the nanoencapsulated DMCNP vaccine formulation against C. trachomatis in mice are warranted.
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Affiliation(s)
- Chino D Cambridge
- Center for NanoBiotechnology Research (CNBR), Alabama State University, Montgomery, AL, USA
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18
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Childs TS, Webley WC. In vitro assessment of halobacterial gas vesicles as a Chlamydia vaccine display and delivery system. Vaccine 2012; 30:5942-8. [DOI: 10.1016/j.vaccine.2012.07.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Revised: 06/06/2012] [Accepted: 07/18/2012] [Indexed: 12/30/2022]
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