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Ding Y, Jiang X, Jing H, Liu G, Cheng J. Recombinant HBsAg-S and RFRP-3 DNA vaccine promotes reproduction hormone secretion in sheep. Theriogenology 2023; 201:68-75. [PMID: 36842263 DOI: 10.1016/j.theriogenology.2023.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/12/2023]
Abstract
RF-amide related peptides (RFRP) have been proposed as critical regulators of gonadotropin secretion in mammals. This study was designed to construct a DNA vaccine and investigate the effect of vaccine encoding RFRP-3 on reproduction physiology in ewe. A recombinant vaccine was constructed using two copies of the RFRP-3 gene and HBsAg-S that generate a fusion protein to induce an immunology response. Results showed this recombinant vaccine could produce a significant antibody titer in the treated animals (P < 0.05). The specific RFRP-3 antibody response induced by the vaccine was detected at week 2 with a peak at week 6 after the initial immunization. Furthermore, we found that ewes inoculated with pVAX-tPA-HBsAg-S-2RFRP-asd vaccine significantly raised the concentration of GnRH, LH and E2 in serum compared to the control group. LH and E2 concentration in the treated ewes (Group T) was significantly higher than that in control ewes (Group C) at weeks 10, 12 and 14 after the initial immunization, respectively (P < 0.05). Therefore, RFRP-3 can be used as a target for DNA immunization to promote reproductive hormone secretion in ewes and RFRP-3 gene immunization might be a candidate tool to regulate mammal reproduction.
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Affiliation(s)
- Yi Ding
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Key Laboratory of Smart Farming for Agricultural Animals, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xunping Jiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Key Laboratory of Smart Farming for Agricultural Animals, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Haijing Jing
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Key Laboratory of Smart Farming for Agricultural Animals, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Guiqiong Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Key Laboratory of Smart Farming for Agricultural Animals, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
| | - Junjun Cheng
- Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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Plant-Produced Mouse-Specific Zona Pellucida 3 Peptide Induces Immune Responses in Mice. Vaccines (Basel) 2023; 11:vaccines11010153. [PMID: 36679998 PMCID: PMC9866649 DOI: 10.3390/vaccines11010153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 01/12/2023] Open
Abstract
Contraceptive vaccines are designed to stimulate autoimmune responses to molecules involved in the reproductive process. A mouse-specific peptide from zona pellucida 3 (mZP3) has been proposed as a target epitope. Here, we employed a plant expression system for the production of glycosylated mZP3 and evaluated the immunogenicity of plant-produced mZP3-based antigens in a female BALB/c mouse model. In the mZP3-1 antigen, mZP3 fused with a T-cell epitope of tetanus toxoid, a histidine tag, and a SEKDEL sequence. A fusion antigen (GFP-mZP3-1) and a polypeptide antigen containing three repeats of mZP3 (mZP3-3) were also examined. Glycosylation of mZP3 should be achieved by targeting proteins to the endoplasmic reticulum. Agrobacterium-mediated transient expression of antigens resulted in successful production of mZP3 in Nicotiana benthamiana. Compared with mZP3-1, GFP-mZP3-1 and mZP3-3 increased the production of the mZP3 peptide by more than 20 and 25 times, respectively. The glycosylation of the proteins was indicated by their size and their binding to a carbohydrate-binding protein. Both plant-produced GFP-mZP3-1 and mZP3-3 antigens were immunogenic in mice; however, mZP3-3 generated significantly higher levels of serum antibodies against mZP3. Induced antibodies recognized native zona pellucida of wild mouse, and specific binding of antibodies to the oocytes was observed in immunohistochemical studies. Therefore, these preliminary results indicated that the plants can be an efficient system for the production of immunogenic mZP3 peptide, which may affect the fertility of wild mice.
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New trends in immunocastration and its potential to improve animal welfare: a mini review. Trop Anim Health Prod 2022; 54:369. [DOI: 10.1007/s11250-022-03348-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/04/2022] [Indexed: 11/06/2022]
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Ahmed S, Dongdong B, Jiayu Z, Liu G, Ding Y, Jiang X, Teketay W, Jing H. Immunocastration with gene vaccine (KISS1) induces a cell-mediated immune response in ram testis: A transcriptome evaluation. Reprod Domest Anim 2022; 57:653-664. [PMID: 35247007 DOI: 10.1111/rda.14106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/27/2022] [Indexed: 11/29/2022]
Abstract
Immunocastration vaccines achieve their effects through neutralization of the endogenous hormone by the humoral antibody produced against the immunized genes. But there is little information regarding cell-mediated immune response on the gonadal function of the immunized model is available. In this study, we used ram as a model animal to identify the cellular immune response in testicular tissues of rams immunized with intranasal KISS1 gene vaccine. The immune castration model was evaluated by sexual behaviors, spermatogenesis, and serum hormone profiles after the KISS1 gene immunization. Transcriptome analysis of testicular tissues was carried out to identify the expressions of protein-coding genes involved in cellular immunity. The results showed that we successfully constructed the KISS1 immune castration ram model, in which testicular growth and development, testosterone and kisspeptin-54 levels, and sexual function were suppressed in immunized rams (P <0.05). Using HiseqTM 2000 high sequencing for ram testicular, we identified 21 differentially expressed genes (DEGs) related to cellular immunity, of which, 14 genes were up-regulated and seven genes were down-regulated in the testis of the immunized group (P<0.05). The Gene Ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment showed that these differentially expressed genes were enriched in the antigen presentation process mediated by MHC class I and the cytotoxic pathway mediated by natural killer cells. It is concluded that KISS1 gene vaccine induced the cell-mediated immune response in testicular tissue to suppress reproductive activities in rams.
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Affiliation(s)
- Sohail Ahmed
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Bo Dongdong
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Zhao Jiayu
- Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Guiqiong Liu
- Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Yi Ding
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xunping Jiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Wassie Teketay
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Haijing Jing
- Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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5
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Chang AM, Chen CC, Hou DL, Ke GM, Lee JW. Effects of a Recombinant Gonadotropin-Releasing Hormone Vaccine on Reproductive Function in Adult Male ICR Mice. Vaccines (Basel) 2021; 9:808. [PMID: 34451933 PMCID: PMC8402355 DOI: 10.3390/vaccines9080808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 12/01/2022] Open
Abstract
Gonadotropin-releasing hormone (GnRH) regulates the reproductive endocrine system in mammals. The GnRH immunocontraception vaccine can aid animal population control and management. We evaluated a recombinant GnRH fusion protein with the adjuvant MONTANIDE ISA 206 VG as a GnRH vaccine in adult male ICR mice by evaluating anti-GnRH antibodies; concentrations of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and testosterone; testis size and histomorphology; and semen quality. Response was assessed after intramuscular administration of the vaccine to mice in weeks 0, 4, and 8. The vaccine induced specific antibody response by week 5, with peak of antibody levels observed by week 13 and a declining level thereafter until the end of the study at week 24. Furthermore, it reduced serum FSH, LH, and testosterone concentrations. The vaccinated mice exhibited testicular atrophy and reduced sperm quality, concentration, morphology, and viability compared to control males. The outcomes of pairings of treated males with untreated females revealed reduced mating, pregnancy rates and number of litters compared to control pairings. Assessment of this GnRH vaccine in different species could assist its development for future applications.
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Affiliation(s)
- Ai-Mei Chang
- International Program in Animal Vaccine Technology, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (A.-M.C.); (G.-M.K.)
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Chen-Chih Chen
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Institute of Wildlife Conservation, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan;
| | - Ding-Liang Hou
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan;
| | - Guan-Ming Ke
- International Program in Animal Vaccine Technology, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (A.-M.C.); (G.-M.K.)
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan;
- Institute of Animal Vaccine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Jai-Wei Lee
- International Program in Animal Vaccine Technology, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; (A.-M.C.); (G.-M.K.)
- Department of Tropical Agriculture and International Cooperation, International College, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
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Wassie T, Fanmei Z, Jiang X, Liu G, Girmay S, Min Z, Chenhui L, Bo DD, Ahmed S. Recombinant B2L and Kisspeptin-54 DNA Vaccine Induces Immunity Against Orf Virus and Inhibits Spermatogenesis In Rats. Sci Rep 2019; 9:16262. [PMID: 31700161 PMCID: PMC6838309 DOI: 10.1038/s41598-019-52744-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 10/08/2019] [Indexed: 02/06/2023] Open
Abstract
Orf is a highly contagious zoonotic disease of small ruminants caused by Parapoxvirus. Kisspeptin, encoded by the KISS1 gene with its cognate receptor GPR-54 is recognized as an upstream orchestrator in the hypothalamic-pituitary-gonadal axis. This study was designed to construct a DNA vaccine that produces a fused peptide composed of a major immunodominant protein of the orf virus (B2L) and kisspeptin-54, a neuropeptide with recognized roles in mammalian reproductive biology. The administration of this recombinant vaccine is shown to produce a significant antibody and cell-mediated immune response directed against B2L compared to the control group (p < 0.05). Furthermore, we found that rats inoculated with PBK-asd vaccine up-regulated antigen-mediated splenocyte proliferation and significantly raised antigen-specific tumor necrosis factor-alpha (TNFα-), interferon-gamma (IFN-ϒ) and interleukin (IL-2) compared to the control group (p < 0.05). This recombinant vaccine also stimulated antibody responses to kisspeptin and decreased serum luteinizing hormone and testosterone levels. Moreover, the current recombinant vaccine caused testicular atrophy and arrested spermatogenesis. It is concluded that this recombinant B2L and Kisspeptin-54 vaccine could be a promising approach for construction of bivalent orf virus and immunocastration vaccine. Furthermore, we concluded that the orf virus envelope protein (B2L) could be used as an immunomodulator for kisspeptin-54 to produce a strong antibody response.
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Affiliation(s)
- Teketay Wassie
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Zeng Fanmei
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xunping Jiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China. .,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China.
| | - Guiqiong Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Laboratory of Sheep and Goat Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Shishay Girmay
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Zhang Min
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Liu Chenhui
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Dong Dong Bo
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Sohail Ahmed
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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7
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Tesema B, Zhao JY, Jiang XP, Liu GQ, Han YG, Wassie T. Kisspeptin recombinant oral vaccine: A master gene vaccine inhibiting the reproductive physiology and behavior of ram lambs. Vaccine 2019; 37:4630-4636. [DOI: 10.1016/j.vaccine.2017.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/21/2017] [Accepted: 09/03/2017] [Indexed: 12/27/2022]
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Rima UK, Bari ASM, Hossain MZ, Khan MAH. Plasmid DNA vaccine coding eight repeats of gonadotrophin-releasing hormone induced atrophy of prostate in male mice. Prostate Int 2018; 6:151-156. [PMID: 30505818 PMCID: PMC6251954 DOI: 10.1016/j.prnil.2018.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/17/2017] [Accepted: 01/04/2018] [Indexed: 11/26/2022] Open
Abstract
Background Prostate hyperplasia and neoplasia are major illness of men and elderly dogs. Treatment of prostate cancer requires androgen deprivation surgery or therapy to prevent metastases and alleviate pain. Recently, six DNA vaccines have entered clinical trials against prostate cancer in humans with limited success. There is a need for new therapies that delay the establishment of malignancy and prolong survival. Materials and methods A plasmid DNA vaccine coding for eight gonadotrophin-releasing hormone (GnRH-I) interspersed in eight T-helper epitopes was used. Sexually mature male mice were immunized with the vaccine in hemagglutinating virus of Japanese envelope vector and boosted in nonionized surfactant vesicles in study weeks 0, 3, 6, 9, and 12. Plasma anti-GnRH-I antibody response, serum testosterone concentration, and effect on prostate were evaluated. Results Results of an indirect enzyme linked immunosorbent assay (ELISA) showed anti-GnRH-I antibody response (OD value) detected in the study week 3 (0.613 ± 0.179) with a highest response in the week 12 (1.205 ± 0.219). Serum testosterone concentration (ng/ml) in vaccinated mice was significantly reduced (P > 0.000, 0.761 ± 0.531) in the study week 24 in contrast to control serum (7.583 ± 1.251). Group average gross combined weight of prostate and seminal vesicles of vaccinated mice was significantly (P < 0.000) reduced in the study week 24 (319.75 ± 89.19 mg) in contrast to control weight (563.25 ± 108.60 mg). Sections of prostate stained with Goldner's trichrome showed profuse pink color secretion in control tubules, which however was absent in the vaccinated prostate. The lining epithelium of the vaccinated prostate was atrophied and did not enfold in its lumen. Conclusions Immunization strategy designed with the plasmid DNA vaccine in hemagglutinating virus of Japanese envelope and nonionized surfactant vesicles can be the genetic immunization platform. This vaccine bears potentials in terms of reducing serum testosterone concentration and induction of atrophy of prostate. Targeted ablation of native GnRH-I by genetic immunization could offer leverage to vaccinologists, seeking therapeutic target to control and prevent malignancy of prostate.
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Affiliation(s)
- Umme K Rima
- Department of Medicine, Surgery and Obstetrics, Faculty of Veterinary & Animal Science, Hajee Mohammad Danesh Science & Technology University, Dinajpur, Bangladesh
| | - Abu S M Bari
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Mohammad Z Hossain
- Department of Livestock Services, Ministry of Livestock and Fisheries, Bangladesh
| | - Mohammad A H Khan
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
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9
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Connell DJ, Gebril A, Khan MAH, Patwardhan SV, Kubiak-Ossowska K, Ferro VA, Mulheran PA. Rationalising drug delivery using nanoparticles: a combined simulation and immunology study of GnRH adsorbed to silica nanoparticles. Sci Rep 2018; 8:17115. [PMID: 30459397 PMCID: PMC6244087 DOI: 10.1038/s41598-018-35143-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 10/26/2018] [Indexed: 11/30/2022] Open
Abstract
Silica nanoparticles (SiNPs) have been shown to have significant potential for drug delivery and as adjuvants for vaccines. We have simulated the adsorption of GnRH-I (gonadotrophin releasing hormone I) and a cysteine-tagged modification (cys-GnRH-I) to model silica surfaces, as well as its conjugation to the widely-used carrier protein bovine serum albumin (BSA). Our subsequent immunological studies revealed no significant antibody production was caused by the peptide-SiNP systems, indicating that the treatment was not effective. However, the testosterone response with the native peptide-SiNPs indicated a drug effect not found with cys-GnRH-I-SiNPs; this behaviour is explained by the specific orientation of the peptides at the silica surface found in the simulations. With the BSA systems, we found significant testosterone reduction, particularly for the BSA-native conjugates, and an antibody response that was notably higher with the SiNPs acting as an adjuvant; this behaviour again correlates well with the epitope presentation predicted by the simulations. The range of immunological and hormone response can therefore be interpreted and understood by the simulation results and the presentation of the peptides to solution, paving the way for the future rational design of drug delivery and vaccine systems guided by biomolecular simulation.
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Affiliation(s)
- David J Connell
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Ayman Gebril
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Mohammad A H Khan
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Siddharth V Patwardhan
- Department of Chemical and Biological Engineering, The University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Karina Kubiak-Ossowska
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Valerie A Ferro
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Paul A Mulheran
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK.
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10
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DNA Vaccine Targeting Gonadotropin-Releasing Hormone Receptor and Its Application in Animal Contraception. Mol Biotechnol 2018; 61:73-83. [PMID: 30448908 DOI: 10.1007/s12033-018-0137-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Overpopulation of free-roaming and wildlife animals negatively affects economy and public health in many parts of the world. Contraceptive vaccines are viewed as a valuable option for reducing numbers of unwanted animals. This study develops vaccines for potential use in animal contraception exploiting a DNA platform. Objectives of the study were to generate DNA constructs directed against gonadotropin-releasing hormone receptor (GnRHR), a crucial molecular player in animal reproduction, and characterize them for ability to promote immune responses and suppression of reproductive parameters in vivo. DNA constructs were created to encode for a recombinant protein composed of two domains: GnRHR, the target antigen, and ubiquitin (Ub), a support protein. Ub-GnRHR constructs administered intramuscularly or intradermally or containing different promoters were compared. CMV and EF1α promoters were shown to be superior to CAG. In fertility trials, mice immunized intradermally with Ub-GnRHR construct driven by EF1α had a significantly lower number of fetuses. Importantly, the impaired fertility was achieved with a single DNA immunization and without the use of adjuvants. The study demonstrated for the first time that targeting the GnRH receptor with DNA-based vaccines could be a viable option for animal contraception.
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11
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Potent effect of KISS1-54 DNA vaccine compared with KISS1-10 DNA vaccine in inhibiting the fertility of female rats. Vaccine 2018; 36:6631-6639. [DOI: 10.1016/j.vaccine.2018.09.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 09/09/2018] [Accepted: 09/23/2018] [Indexed: 12/13/2022]
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12
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Yao Z, Si W, Tian W, Ye J, Zhu R, Li X, Ji S, Zheng Q, Liu Y, Fang F. Effect of active immunization using a novel GnRH vaccine on reproductive function in rats. Theriogenology 2018; 111:1-8. [PMID: 29407422 DOI: 10.1016/j.theriogenology.2018.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 01/13/2018] [Accepted: 01/18/2018] [Indexed: 11/29/2022]
Abstract
To investigate the effect of gonadotropin-releasing hormone 2-multiple antigen peptide (GnRH2-MAP) on reproductive function. In our study, 20-day-old male rats (n = 90) were randomly allocated to one of three treatment groups: GnRH2-MAP immunization, GnRH2 immunization, and non-immunized control groups. The immunized animals were administered three doses of GnRH2-MAP or GnRH2 vaccines from 0 to 6 weeks at 2-week intervals. The control group only received oil adjuvant. Blood and right testis samples were collected, and the left testis was weighed and its volume was measured at 0, 2, 4, 6, 8, 10 and 12 weeks after the first immunization. The serum antibody titer and testosterone concentration were determined by ELISA, and the right testis samples were collected for histological analysis. The results revealed that the serum of vaccinated rats elicited a significantly higher antibody titer and a lower T concentration compared with the control group two weeks after the first immunization (P < 0.05), but the highest antibody titer and lowest T concentration were found in animals treated with GnRH2-MAP (P < 0.05). The second immunization resulted in a significant decrease in testicular weight and volume (P < 0.05) in both immunized groups compared to the control, but these values were significantly lower in the GnRH2-MAP group than in the GnRH2 group. Furthermore, seminiferous tubules revealed more significant atrophy in the GnRH2-MAP group than in the GnRH2 group, and no sperm were observed in rats of the GnRH2-MAP group. Thus, GnRH2-MAP may be an effective antigen and a potential immunocastration vaccine with higher effectiveness.
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Affiliation(s)
- Zhiqiu Yao
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Wenyu Si
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Weiguo Tian
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Jing Ye
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Rongfei Zhu
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Xiumei Li
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Shichun Ji
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Qianqian Zheng
- Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Ya Liu
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China
| | - Fugui Fang
- Anhui Provincial Key Laboratory of Genetic Resources Protection and Biological Breeding in Local Livestock and Poultry, 130 Changjiang West Road, Hefei, Anhui 230036, China; Department of Animal Veterinary Science, College of Animal Sciences and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, China.
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Han YG, Liu GQ, Jiang XP, Xiang XL, Huang YF, Nie B, Zhao JY, Nabeel I, Tesema B. Reversibility and safety of KISS1 metastasis suppressor gene vaccine in immunocastration of ram lambs. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 31:835-841. [PMID: 29268573 PMCID: PMC5933981 DOI: 10.5713/ajas.17.0629] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/13/2017] [Accepted: 12/11/2017] [Indexed: 01/27/2023]
Abstract
Objective The aim of this study was to investigate the reversibility and safety of KISS1 metastasis suppressor (KISS1) gene vaccine in immunocastration. Methods Six eight-week old ram lambs were randomly divided into vaccinated and control groups. The vaccine (1 mg/ram lamb) was injected at weeks 0, 3, and 6 of the study. Blood samples were collected from the jugular vein before primary immunization and at weeks 2, 4, 6, 10, 14, 22, and 30 after primary immunization. All ram lambs were slaughtered at 38 weeks of age, and samples were collected. Results The specific anti-KISS1 antibody titers in vaccinated animals were significantly higher and the serum testosterone level was significantly lower than those in the control groups from week 4 to 14 after primary immunization (p<0.05). No significant difference was observed at weeks 22 and 30 after the primary immunization. Similar results were also found for scrotal circumference, testicular weight, length, breadth, and spermatogenesis in seminiferous tubules in week 30 after primary immunization. KS (KISS1-hepatitis B surface antigen S) fusion fragment of KISS1 gene vaccine was not detected in host cell genomic DNA of 9 tissues of the vaccinated ram lambs by polymerase chain reaction. Conclusion The effects of KISS1 gene vaccine in immunocastration were reversible and no integration events were recorded.
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Affiliation(s)
- Yan-Guo Han
- Chongqing Key Laboratory of Forage & Herbivore, Chongqing Engineering Research Centre for Herbivores Resource Protection and Utilization, College of Animal Science and Technology, Southwest University, Chongqing 400715, China.,Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Gui-Qiong Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xun-Ping Jiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xing-Long Xiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yong-Fu Huang
- Chongqing Key Laboratory of Forage & Herbivore, Chongqing Engineering Research Centre for Herbivores Resource Protection and Utilization, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Bin Nie
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jia-Yu Zhao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ijaz Nabeel
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Birhanu Tesema
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Siel D, Loaiza A, Vidal S, Caruffo M, Paredes R, Ramirez G, Lapierre L, Briceño C, Pérez O, Sáenz L. The immune profile induced is crucial to determine the effects of immunocastration over gonadal function, fertility, and GnRH-I expression. Am J Reprod Immunol 2017; 79. [PMID: 29048721 DOI: 10.1111/aji.12772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/18/2017] [Indexed: 01/29/2023] Open
Abstract
PROBLEM Immunocastration or vaccination against the GnRH-I hormone is a promising alternative to reproductive control in different animal species. Given the low immunogenicity of this hormone, the use of adjuvants becomes necessary. METHOD OF STUDY This study evaluated the effects of three adjuvants that induce different immune response profiles over gonadal function, fertility, and expression of GnRH-I. Female mice (n = 6) were vaccinated at days 1 and 30 with a recombinant antigen for immunocastration and different adjuvants that induced preferentially Th1/Th2, Th2, and Th1 immune profiles. RESULTS Th1/Th2 response is the most efficient to block reproductive activity in vaccinated animals, reducing the number of luteal bodies and pre-ovulatory follicles. Th2 and Th1/Th2 responses induced an increase in GnRH-I at the hypothalamus. CONCLUSION The immune profile induced by different adjuvants is essential on the effects over fertility, gonadal function, and hypothalamic GnRH-I expression in immunocastrated animals.
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Affiliation(s)
- Daniela Siel
- Laboratory of Veterinary Vaccines, Department of Animal Biology, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Alexandra Loaiza
- Laboratory of Veterinary Vaccines, Department of Animal Biology, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Sonia Vidal
- Laboratory of Veterinary Vaccines, Department of Animal Biology, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Mario Caruffo
- Laboratory of Veterinary Vaccines, Department of Animal Biology, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Rodolfo Paredes
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Santiago, Chile
| | - Galia Ramirez
- Department of Preventive Medicine, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Lisette Lapierre
- Department of Preventive Medicine, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Cristóbal Briceño
- Department of Preventive Medicine, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
| | - Oliver Pérez
- Immunology Department, Instituto de Ciencias Básicas y Preclínicas "Victoria de Girón", Universidad de Ciencias Médicas de La Habana, La Habana, Cuba
| | - Leonardo Sáenz
- Laboratory of Veterinary Vaccines, Department of Animal Biology, Faculty of Veterinary and Animal Science, Universidad de Chile, Santiago, Chile
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Han YG, Ye WJ, Liu GQ, Jiang XP, Ijaz N, Zhao JY, Tesema B. Hepatitis B Surface Antigen S Gene is an Effective Carrier Molecule for Developing GnRH DNA Immunocastration Vaccine in Mice. Reprod Domest Anim 2016; 51:445-50. [DOI: 10.1111/rda.12692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Accepted: 03/19/2016] [Indexed: 01/20/2023]
Affiliation(s)
- YG Han
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
- Chongqing Key Laboratory of Forage & Herbivore; Chongqing Engineering Research Centre for Herbivores Resource Protection and Utilization; College of Animal Science and Technology; Southwest University; Chongqing China
| | - WJ Ye
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
| | - GQ Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
| | - XP Jiang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
| | - N Ijaz
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
| | - JY Zhao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
| | - B Tesema
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education; College of Animal Science and Technology; Huazhong Agricultural University; Wuhan China
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Chang C, Varamini P, Giddam AK, Mansfeld FM, D'Occhio MJ, Toth I. Investigation of Structure-Activity Relationships of Synthetic Anti-Gonadotropin Releasing Hormone Vaccine Candidates. ChemMedChem 2015; 10:901-10. [DOI: 10.1002/cmdc.201500036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Indexed: 11/05/2022]
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Han Y, Liu G, Jiang X, Ijaz N, Tesema B, Xie G. KISS1 can be used as a novel target for developing a DNA immunocastration vaccine in ram lambs. Vaccine 2015; 33:777-82. [DOI: 10.1016/j.vaccine.2014.12.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/14/2014] [Accepted: 12/17/2014] [Indexed: 12/23/2022]
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Jiang S, Hong M, Su S, Song M, Tian Y, Cui P, Song S, Wang Y, Li F, Fang F. Effect of active immunization against GnRH-I on the reproductive function in cat. Anim Sci J 2015; 86:747-54. [DOI: 10.1111/asj.12355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 10/03/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Shudong Jiang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Meizhen Hong
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Shiping Su
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Min Song
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Yuan Tian
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Pei Cui
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Shuang Song
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Yaoyao Wang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
| | - Fubao Li
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
- Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding; Hefei Anhui China
- Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province; Hefei Anhui China
| | - Fugui Fang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding; College of Animal Sciences and Technology; Anhui Agricultural University; Hefei Anhui China
- Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding; Hefei Anhui China
- Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province; Hefei Anhui China
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Liu Y, Tian Y, Zhao X, Jiang S, Li F, Zhang Y, Zhang X, Li Y, Zhou J, Fang F. Immunization of dogs with recombinant GnRH-1 suppresses the development of reproductive function. Theriogenology 2014; 83:314-9. [PMID: 25468551 DOI: 10.1016/j.theriogenology.2014.06.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 11/17/2022]
Abstract
This study was designed to evaluate the effect of active immunization using recombinant GnRH-I protein on reproductive function in dogs. Six male and six female dogs were randomly assigned to either a control group or an immunization group (n = 3 males or 3 females/group). Dogs (aged 16 weeks) were immunized against GnRH-I with a maltose-binding protein-gonadotropin-releasing hormone I hexamer generated by recombinant DNA technology. Blood samples were taken at 4-week intervals after immunization. The serum concentrations of testosterone and estradiol and anti-GnRH-I antibodies were determined by RIA and ELISA, respectively. The results showed that active immunization with recombinant GnRH-I increased the serum levels of anti-GnRH antibodies (P < 0.05) and reduced the serum concentrations of testosterone (P < 0.05) and estradiol (P < 0.05) as compared with the controls. At 28 weeks of age, testes and ovaries were taken surgically for morphologic evaluation. Histologic studies performed on testicular and ovarian tissues revealed clear signs of atrophy in the recombinant GnRH-I-immunized dogs and a significant reduction (P < 0.05) in the weights and sizes of paired testes and ovaries in the treated dogs. Microscopically, spermatogonia were visible, but no spermatids and spermatozoa were detected in the seminiferous tubules. Neither early antral nor antral follicles were found in the immunized group. These results demonstrate that recombinant GnRH-I is an effective immunogen in dogs.
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Affiliation(s)
- Ya Liu
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Yuan Tian
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Xijie Zhao
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Shudong Jiang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Fubao Li
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Yunhai Zhang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiaorong Zhang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Yunsheng Li
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Jie Zhou
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
| | - Fugui Fang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Anhui Provincial Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China; Engineering Research Center of Reproduction and breeding in Sheep of Anhui Province, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China.
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Detection of antibodies against customized epitope: use of a coating antigen employing VEGF as fusion partner. Appl Microbiol Biotechnol 2014; 98:6659-66. [PMID: 24595426 DOI: 10.1007/s00253-014-5618-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 02/10/2014] [Accepted: 02/11/2014] [Indexed: 10/25/2022]
Abstract
Diagnosis of many infectious, autoimmune diseases and cancers depends on the detection of specific antibodies against peptide epitope by enzyme-linked immunosorbent assay (ELISA). However, small peptides are difficult to be coated on the plate surfaces. In this study, we selected GnRH as a model hapten to evaluate whether VEGF121 would be suitable as an irrelevant hapten-carrier to develop a universal platform for specific antibodies detection. Firstly, GnRH was fused to the C terminus of VEGF121 and the resultant fusion protein VEGF-GnRH expressed effectively as inclusion bodies in Escherichia coli. Thereafter, VEGF-GnRH was easily purified to near homogeneity with a yield of about 235 mg from 2.1 L induced culture. At last, VEGF-GnRH was used to perform ELISA and western blot, and our results suggested that VEGF-GnRH was capable of detecting anti-GnRH antibodies in sera both qualitatively and quantitatively. Indeed, previous studies of our laboratory had demonstrated that other fusion proteins such as VEGF-Aβ10, VEGF-GRP, VEGF-CETPC, and VEGF-βhCGCTP37 were able to detect their corresponding antibodies specifically. Therefore, VEGF121 may be a suitable irrelevant fusion partner of important diagnostic peptide markers. Our works would shed some light on the development of a universal platform for detection of specific antibodies.
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21
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Massei G, Cowan D. Fertility control to mitigate human–wildlife conflicts: a review. WILDLIFE RESEARCH 2014. [DOI: 10.1071/wr13141] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
As human populations grow, conflicts with wildlife increase. Concurrently, concerns about the welfare, safety and environmental impacts of conventional lethal methods of wildlife management restrict the options available for conflict mitigation. In parallel, there is increasing interest in using fertility control to manage wildlife. The present review aimed at analysing trends in research on fertility control for wildlife, illustrating developments in fertility-control technologies and delivery methods of fertility-control agents, summarising the conclusions of empirical and theoretical studies of fertility control applied at the population level and offering criteria to guide decisions regarding the suitability of fertility control to mitigate human–wildlife conflicts. The review highlighted a growing interest in fertility control for wildlife, underpinned by increasing numbers of scientific studies. Most current practical applications of fertility control for wild mammals use injectable single-dose immunocontraceptive vaccines mainly aimed at sterilising females, although many of these vaccines are not yet commercially available. One oral avian contraceptive, nicarbazin, is commercially available in some countries. Potential new methods of remote contraceptive delivery include bacterial ghosts, virus-like particles and genetically modified transmissible and non-transmissible organisms, although none of these have yet progressed to field testing. In parallel, new species-specific delivery systems have been developed. The results of population-level studies of fertility control indicated that this approach may increase survival and affect social and spatial behaviour of treated animals, although the effects are species- and context-specific. The present studies suggested that a substantial initial effort is generally required to reduce population growth if fertility control is the sole wildlife management method. However, several empirical and field studies have demonstrated that fertility control, particularly of isolated populations, can be successfully used to limit population growth and reduce human–wildlife conflicts. In parallel, there is growing recognition of the possible synergy between fertility control and disease vaccination to optimise the maintenance of herd immunity in the management of wildlife diseases. The review provides a decision tree that can be used to determine whether fertility control should be employed to resolve specific human–wildlife conflicts. These criteria encompass public consultation, considerations about animal welfare and feasibility, evaluation of population responses, costs and sustainability.
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22
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Gebril AM, Lamprou DA, Alsaadi MM, Stimson WH, Mullen AB, Ferro VA. Assessment of the antigen-specific antibody response induced by mucosal administration of a GnRH conjugate entrapped in lipid nanoparticles. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2013; 10:971-9. [PMID: 24374362 DOI: 10.1016/j.nano.2013.12.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 11/28/2013] [Accepted: 12/18/2013] [Indexed: 01/14/2023]
Abstract
UNLABELLED Vaccines administered parenterally have been developed against gonadotrophin-releasing hormone (GnRH) for anti-fertility and anti-cancer purposes. The aim of this study was to demonstrate whether mucosal delivery using GnRH immunogens entrapped in lipid nanoparticles (LNP) could induce anti-GnRH antibody titers. Immunogens consisting of KLH (keyhole limpet hemocyanin) conjugated to either GnRH-I or GnRH-III analogues were entrapped in LNP. Loaded non-ionic surfactant vesicles (NISVs) were administered subcutaneously, while nasal delivery was achieved using NISV in xanthan gum and oral delivery using NISV containing deoxycholate (bilosomes). NISV and bilosomes had similar properties: they were spherical, in the nanometre size range, with a slightly negative zeta potential and surface properties that changed with protein loading and inclusion of xanthan gum. Following immunization in female BALB/c mice, systemic antibody responses were similar for both GnRH-I and GnRH-III immunization. Only nasal delivery proved to be successful in terms of producing systemic and mucosal antibodies. FROM THE CLINICAL EDITOR The main research question addressed in this study was whether mucosal delivery using gonadotrophin-releasing hormone immunogens entrapped in lipid nanoparticles could induce anti-GnRH antibody titers. Only nasal delivery proved to be successful in terms of producing systemic and mucosal antibodies with this approach.
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Affiliation(s)
- Ayman M Gebril
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK; Faculty of Veterinary Medicine, Omar Al-Mukhtar University, Al-Bayda, Libya
| | - Dimitrios A Lamprou
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK
| | - Manal M Alsaadi
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK
| | - William H Stimson
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK
| | - Alexander B Mullen
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK
| | - Valerie A Ferro
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow, UK.
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Samoylov A, Cox N, Cochran A, Wolfe K, Donovan C, Kutzler M, Petrenko V, Baker H, Samoylova T. Generation and characterization of phage-GnRH chemical conjugates for potential use in cat and dog immunocontraception. Reprod Domest Anim 2013; 47 Suppl 6:406-11. [PMID: 23279551 DOI: 10.1111/rda.12061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Overpopulation of cats and dogs is a serious worldwide problem that demands novel, safe and cost-effective solutions. The objective of this study was to generate and characterize phage-peptide conjugates with gonadotropin-releasing hormone (GnRH) for potential use as an immunocontraceptive. A filamentous phage vector f5-8 with wild-type phage coat proteins was used as a carrier for construction of chemical conjugates with GnRH, a peptide that acts as a master reproductive hormone. In such conjugates, the phage body plays the role of a carrier protein, while multiple copies of GnRH peptide stimulate production of neutralizing anti-GnRH antibodies potentially leading to contraceptive effects. To generate the constructs, four different GnRH-based peptides were synthesized and conjugated to phage particles in a two-step procedure: (i) peptides were reacted with phage to form a conjugate using 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride chemistry (EDC) and (ii) the conjugates were separated from remaining free peptides by dialysis. Formation and specificity of phage-GnRH conjugates were confirmed by three independent methods: spectrophotometry, electron microscopy and ELISA. When the conjugates were tested for interaction with sera collected from cats and dogs immunized with GnRH-based vaccines in independent studies, strong specific ELISA signals were obtained, suggesting the potential use of the conjugates for cat and dog immunosterilization. The ability of the conjugates to stimulate production of anti-GnRH antibodies in vivo was evaluated in mice. While optimization of dose, immunization route and adjuvant still requires investigation, our preliminary results demonstrated the presence of anti-GnRH antibodies in sera of mice immunized with such conjugates. Fertility trials in cats and dogs will be needed to evaluate contraceptive potentials of the phage-GnRH peptide chemical conjugates.
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Affiliation(s)
- A Samoylov
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.
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Increased survival time in mice vaccinated with a branched lysine multiple antigenic peptide containing B- and T-cell epitopes from T. gondii antigens. Vaccine 2011; 29:8619-23. [DOI: 10.1016/j.vaccine.2011.09.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 08/11/2011] [Accepted: 09/07/2011] [Indexed: 11/21/2022]
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Fang F, Liu Y, Pu Y, Wang L, Wang S, Zhang X. Immunogenicity of Recombinant Maltose-binding Protein (MBP)–Gonadotropin Releasing Hormone I (GnRH-I). Syst Biol Reprod Med 2010; 56:478-86. [DOI: 10.3109/19396368.2010.481005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
PRACTICAL RELEVANCE Reproduction control is an area of feline medicine that is assuming increasing importance in companion animal practice. Signs of oestrus such as increased vocalisation, rolling on the ground and a very short interoestrous interval may negatively influence the relationship between cat and owner, and prompt the owner to seek a method of reproduction control. In breeding catteries, control of reproduction may be needed as part of a planned breeding programme. CLINICAL CHALLENGES Surgical contraception is not always the owner's wish - especially when a cat may be intended for future breeding. Besides, ethical principles and animal welfare legislation in an increasing number of countries are imposing restrictions on this 'classical approach' to reproduction control. Progestins are routinely used as non-surgical alternatives in cases where fertility is to be preserved, but the associated risks of uterine disease, mammary tumours, fibroadenomatosis or diabetes mellitus have to be taken into account - especially in predisposed animals. Modern, effective pharmacological alternatives are available for managing oestrous suppression and unwanted pregnancy. Detailed knowledge of the physiology of the oestrous cycle in the cat is necessary to ensure that the appropriate treatment is chosen for the individual animal and its owner. AUDIENCE This article presents an update for small animal practitioners on these alternative methods; specifically, the use of slow-release GnRH agonists or melatonin implants for hormonal contraception, and the antiprogestin aglepristone for pregnancy termination. EVIDENCE BASE Several studies have documented the mode of action and risk of side effects of the traditional alternative to surgical castration - treatment with progestins. Evidence underpinning the safety and efficacy of GnRH agonists and melatonin implants for suppression of fertility in queens and toms is reviewed.
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Affiliation(s)
- Sandra Goericke-Pesch
- Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals, Justus-Liebig University, Frankfurter Strasse 106, 35392 Giessen, Germany.
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Fang F, Li H, Liu Y, Zhang Y, Tao Y, Li Y, Cao H, Wang S, Wang L, Zhang X. Active immunization with recombinant GnRH fusion protein in boars reduces both testicular development and mRNA expression levels of GnRH receptor in pituitary. Anim Reprod Sci 2010; 119:275-81. [PMID: 20129744 DOI: 10.1016/j.anireprosci.2010.01.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 12/18/2009] [Accepted: 01/08/2010] [Indexed: 11/25/2022]
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Belgorosky D, Sander VA, Yorio MPD, Faletti AG, Motta AB. Hyperandrogenism alters intraovarian parameters during early folliculogenesis in mice. Reprod Biomed Online 2010; 20:797-807. [PMID: 20362510 DOI: 10.1016/j.rbmo.2010.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 11/23/2009] [Accepted: 01/21/2010] [Indexed: 01/31/2023]
Abstract
This study aimed to investigate how hyperandrogenism affects early folliculogenesis. Hyperandrogenism was induced in prepuberal female BALB/c mice by daily s.c. injection of dehydroepiandrosterone (60 mg/kg body weight in 0.1 ml sesame oil) for 10 consecutive days. Although hyperandrogenism increased the growth rate of primary follicles, it also increased ovarian oxidative stress (evaluated by the increase in lipid peroxidation, the decrease in superoxide dismutase activity and the fact that glutathione content was not modified). By using the annexin V/cytometry assay it was found that the excess of androgens decreased viable ovarian cells and increased early apoptotic ones. The increased lipid peroxidation induced enhanced ovarian prostaglandin E production. In addition, hyperandrogenism increased the number of T lymphocytes that infiltrate ovarian tissue and modified their phenotype (decreased CD4+ or helper and increased the suppressor/cytotoxic CD8+). The excess of androgens decreased the ovarian expression of the long isoform of leptin receptor (Ob-Rb, the only isoform expressed in the ovarian tissue) when compared with controls. All these alterations increased serum concentrations of oestradiol, a pro-apoptotic agent. It is concluded that the excess of androgens impairs early follicular development by modulating some endocrine and immune parameters that are either directly or indirectly related to follicular atresia.
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Affiliation(s)
- Denise Belgorosky
- Laboratorio de Fisiopatología Ovárica, Centro de Estudios Farmacológicos y Botánicos (CEFYBO), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Departamento de Farmacología, Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, 1121ABG Buenos Aires, Argentina
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Cong H, Gu QM, Yin HE, Wang JW, Zhao QL, Zhou HY, Li Y, Zhang JQ. Multi-epitope DNA vaccine linked to the A2/B subunit of cholera toxin protect mice against Toxoplasma gondii. Vaccine 2008; 26:3913-21. [DOI: 10.1016/j.vaccine.2008.04.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 04/04/2008] [Accepted: 04/22/2008] [Indexed: 01/11/2023]
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