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Rodríguez-Mallon A, Encinosa Guzmán PE, Bello Y, Domingos A, Antunes S, Kopacek P, Santos AS, Velez R, Perner J, Ledesma Bravo FL, Frantova H, Erhart J, Rodríguez R, Fuentes A, Diago D, Joglar M, Méndez L, Estrada MP. Efficacy of the Vaccine Candidate Based on the P0 Peptide against Dermacentor nitens and Ixodes ricinus Ticks. Pathogens 2023; 12:1365. [PMID: 38003829 PMCID: PMC10675505 DOI: 10.3390/pathogens12111365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
The control of ticks through vaccination offers a sustainable alternative to the use of chemicals that cause contamination and the selection of resistant tick strains. However, only a limited number of anti-tick vaccines have reached commercial realization. In this sense, an antigen effective against different tick species is a desirable target for developing such vaccines. A peptide derived from the tick P0 protein (pP0) conjugated to a carrier protein has been demonstrated to be effective against the Rhipicephalus microplus, Rhipicephalus sanguineus, and Amblyomma mixtum tick species. The aim of this work was to assess the efficacy of this peptide when conjugated to the Bm86 protein against Dermacentor nitens and Ixodes ricinus ticks. An RNAi experiment using P0 dsRNA from I. ricinus showed a dramatic reduction in the feeding of injected female ticks on guinea pigs. In the follow-up vaccination experiments, rabbits were immunized with the pP0-Bm86 conjugate and challenged simultaneously with larvae, nymphs, and the adults of I. ricinus ticks. In the same way, horses were immunized with the pP0-Bm86 conjugate and challenged with D. nitens larva. The pP0-Bm86 conjugate showed efficacies of 63% and 55% against I. ricinus and D. nitens ticks, respectively. These results, combined with previous reports of efficacy for this conjugate, show the promising potential for its development as a broad-spectrum anti-tick vaccine.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Pedro E. Encinosa Guzmán
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Yamil Bello
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Ana Domingos
- Global Health and Tropical Medicine, GHTM, Associate Laboratory in Translation and Innovation towards Global Health, LA-REAL, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL, Rua da Junqueira 100, 1349-008 Lisboa, Portugal; (A.D.); (S.A.)
| | - Sandra Antunes
- Global Health and Tropical Medicine, GHTM, Associate Laboratory in Translation and Innovation towards Global Health, LA-REAL, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL, Rua da Junqueira 100, 1349-008 Lisboa, Portugal; (A.D.); (S.A.)
| | - Petr Kopacek
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic; (P.K.); (J.P.); (H.F.)
| | - Ana Sofia Santos
- Centro de Estudos de Vetores e Doenças Infeciosas Dr. Francisco Cambournac, Instituto Nacional de Saúde Doutor Ricardo Jorge (CEVDI-INSA), 2965-575 Águas de Moura, Portugal; (A.S.S.); (R.V.)
- Instituto de Saúde Ambiental, Faculdade de Medicina, Universidade de Lisboa, 1649-004 Lisboa, Portugal
| | - Rita Velez
- Centro de Estudos de Vetores e Doenças Infeciosas Dr. Francisco Cambournac, Instituto Nacional de Saúde Doutor Ricardo Jorge (CEVDI-INSA), 2965-575 Águas de Moura, Portugal; (A.S.S.); (R.V.)
| | - Jan Perner
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic; (P.K.); (J.P.); (H.F.)
| | - Frank L. Ledesma Bravo
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Helena Frantova
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic; (P.K.); (J.P.); (H.F.)
| | - Jan Erhart
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic; (P.K.); (J.P.); (H.F.)
| | - Rafmary Rodríguez
- National Laboratory of Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Artemisa 32500, Cuba; (R.R.); (A.F.)
| | - Alier Fuentes
- National Laboratory of Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Artemisa 32500, Cuba; (R.R.); (A.F.)
| | - David Diago
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Marisdania Joglar
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
| | - Luis Méndez
- National Laboratory of Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Artemisa 32500, Cuba; (R.R.); (A.F.)
| | - Mario Pablo Estrada
- Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, Havana 10600, Cuba; (P.E.E.G.); (F.L.L.B.); (D.D.); (M.J.); (M.P.E.)
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Lao González T, Ávalos Olivera I, Rodríguez-Mallon A. Mammalian Cell Culture as a Platform for Veterinary Vaccines. Methods Mol Biol 2022; 2411:37-62. [PMID: 34816397 DOI: 10.1007/978-1-0716-1888-2_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
For more than three decades, mammalian cells have been the host par excellence for the recombinant protein production for therapeutic purposes in humans. Due to the high cost of media and other supplies used for cell growth, initially this expression platform was only used for the production of proteins of pharmaceutical importance including antibodies. However, large biotechnological companies that used this platform continued research to improve its technical and economic feasibility. The main qualitative improvement was obtained when individual cells could be cultured in a liquid medium similar to bacteria and yeast cultures. Another important innovation for growing cells in suspension was the improvement in chemically defined media that does not contain macromolecules; they were cheaper to culture as any other microbial media. These scientific milestones have reduced the cost of mammalian cell culture and their use in obtaining proteins for veterinary use. The ease of working with mammalian cell culture has permitted the use of this expression platform to produce active pharmaceutic ingredients for veterinary vaccines. In this chapter, the protocol to obtain recombinant mammalian cell lines will be described.
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Affiliation(s)
- Thailín Lao González
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Ileanet Ávalos Olivera
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Alina Rodríguez-Mallon
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, Havana, Cuba.
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Encinosa Guzmán PE, Fernández Cuétara C, Cano Argüelles AL, Fuentes Castillo A, García Martínez Y, Rodríguez Fernández R, Fernández Afonso Y, Bello Soto Y, González Alfaro Y, Méndez L, Díaz García A, Estrada MP, Rodríguez-Mallon A. Characterization of two Cuban colonies of Rhipicephalus microplus ticks. Vet Parasitol Reg Stud Reports 2021; 25:100591. [PMID: 34474784 DOI: 10.1016/j.vprsr.2021.100591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 05/10/2021] [Accepted: 05/16/2021] [Indexed: 11/30/2022]
Abstract
Rhipicephalus microplus (Canestrini, 1888) is one of the species with medical and economic relevance that has been reported in the list of Cuban tick species. Some morphological characterizations about the R. microplus species in Cuba have been published; however, molecular studies are lacking. Molecular phylogenetic analyses have grouped R. annulatus, R. australis and three clades of R. microplus in a complex named R. microplus. The present study aimed to characterize two R. microplus tick isolates, established as colonies at the Cuban National Laboratory of Parasitology. Morphological characterization of adult specimens was carried out by using Scanning Electron Microscopy. The sequences of mitochondrial genes: 12S rRNA, 16S rRNA and the subunit I of cytochrome c oxidase (coxI) and one nuclear sequence: internal transcribed spacer 2 (its2) were used for phylogenetic analyses. The life cycle under laboratory conditions for both isolates was also characterized. Tick specimens of both colonies showed morphological characteristics comparable with those distinctive for the R. microplus species. Phylogenies based on mitochondrial gene sequences identified congruently the Cuban tick colonies within the clade A of R. microplus. The life cycle of both isolates under laboratory conditions lasted 65 ± 5 days and the reproductive performance of female ticks of each colony also were similar with approximately 2500 larvae obtained from fully engorged female ticks. This study constitutes the first molecular characterization of ticks from the R. microplus species in Cuba.
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Affiliation(s)
- Pedro E Encinosa Guzmán
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Claudia Fernández Cuétara
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Ana Laura Cano Argüelles
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Alier Fuentes Castillo
- National Laboratory of Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Artemisa CP32500, Cuba
| | - Yuselys García Martínez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | | | - Yilian Fernández Afonso
- Centro de Estudios Avanzados de Cuba, Km 1 1/2 Carretera de San Antonio, Valle Grande, La Lisa, Habana CP17100, Cuba
| | - Yami Bello Soto
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Yorexis González Alfaro
- Centro de Estudios Avanzados de Cuba, Km 1 1/2 Carretera de San Antonio, Valle Grande, La Lisa, Habana CP17100, Cuba
| | - Luis Méndez
- National Laboratory of Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Artemisa CP32500, Cuba
| | - Angelina Díaz García
- Centro de Estudios Avanzados de Cuba, Km 1 1/2 Carretera de San Antonio, Valle Grande, La Lisa, Habana CP17100, Cuba
| | - Mario Pablo Estrada
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Alina Rodríguez-Mallon
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), 31st Avenue and 190, P.O. Box 6162, Havana 10600, Cuba.
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Rodríguez-Mallon A, Encinosa Guzmán PE, Bello Soto Y, Rosales Perdomo K, Montero Espinosa C, Vargas M, Estrada García MP. A chemical conjugate of the tick P0 peptide is efficacious against Amblyomma mixtum. Transbound Emerg Dis 2020; 67 Suppl 2:175-177. [PMID: 31975511 DOI: 10.1111/tbed.13455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/06/2019] [Accepted: 12/12/2019] [Indexed: 11/29/2022]
Abstract
After Rhipicephalus microplus, the most important tick species affecting livestock industry in Cuba belong to the Amblyomma genus. There are few reports of effective vaccine antigens for these species. Recently, vaccination and challenge trials using a peptide from the P0 acidic ribosomal protein of R. microplus ticks (pP0) as antigen have shown an efficacy around 90% against tick species from the Rhipicephalus genus. Given the high degree of sequence conservation among tick species, pP0 could be an antigen of versatile use in anti-tick vaccine formulations. In this paper, seven rabbits were immunized with a chemical conjugate of pP0 to keyhole limpet haemocyanin. Rabbits were challenged with an average of 1,900 Amblyomma mixtum larvae from a Cuban tick strain. The average number of recovered fed larvae and the viability of larvae in the moulting process were significantly lower in vaccinated animals compared with the control group. The overall vaccine efficacy of the P0 peptide antigen is 54% according to the calculated parameters.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Pedro E Encinosa Guzmán
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Yamil Bello Soto
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Karen Rosales Perdomo
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Carlos Montero Espinosa
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Milagros Vargas
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Mario Pablo Estrada García
- Department of Animal Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
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Lorenzo E, Méndez L, Rodríguez E, Gonzalez N, Cabrera G, Pérez C, Pimentel R, Sordo Y, Molto MP, Sardina T, Rodríguez-Mallon A, Estrada MP. Plasticity of the HEK-293 cells, related to the culture media, as platform to produce a subunit vaccine against classical swine fever virus. AMB Express 2019; 9:139. [PMID: 31486941 PMCID: PMC6728104 DOI: 10.1186/s13568-019-0864-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 08/23/2019] [Indexed: 01/27/2023] Open
Abstract
Classical swine fever (CSF) is a contagious disease that causes a high mortality to domestic and wild pigs. Its causative agent is an enveloped Pestivirus named Classical Swine Fever Virus (CSFV). Due to the huge economic affectations produced by this disease to porcine industry, several vaccines have been developed using principally the CSFV E2 glycoprotein. Recently, a subunit vaccine based on this structural protein of the CSFV fused to the porcine CD154 molecule as immunomodulator named E2-CD154 was assayed by us. This chimeric protein was produced in the Human Embryonic Kidney (HEK-293) cell line. In this work, the growth and the expression profiles of HEK-293 E2-CD154 cells in four commercially available culture media were studied. The oligosaccharide structures in the N-glycosylation patterns of the E2-CD154 protein produced by this cell line in 10 L fermenters with two different culture media were also analyzed. In addition, the neutralizing antibody response generated in mice vaccinated with these antigens was assayed. Our results suggest that the culture media CDM4HEK293 and SFM4HEK293 which are recommended for HEK-293 growth are the best choice to growth the cell clone expressing the E2-CD154 protein. The glycosylation pattern and the neutralizing antibody response generated by the E2-CD154 protein were independent of the culture medium used which demonstrates the high reproducibility and consistency among protein batches produced by HEK-293 cells even in different culture conditions.
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Suárez M, Sordo Y, Prieto Y, Rodríguez MP, Méndez L, Rodríguez EM, Rodríguez-Mallon A, Lorenzo E, Santana E, González N, Naranjo P, Frías MT, Carpio Y, Estrada MP. A single dose of the novel chimeric subunit vaccine E2-CD154 confers early full protection against classical swine fever virus. Vaccine 2017; 35:4437-4443. [DOI: 10.1016/j.vaccine.2017.05.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/18/2017] [Accepted: 05/07/2017] [Indexed: 01/07/2023]
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Abstract
Ticks are responsible for the transmission of viral, bacterial, and protozoal diseases of man and animals and also produce significant economic losses to cattle industry. The use of acaricides constitutes a major component of integrated tick control strategies. However, this is accompanied by the selection of acaricide-resistant ticks and contamination of environment and milk and meat products with drug residues. These issues highlight the need for alternative approaches to control tick infestations and have triggered the search for tick protective antigens for vaccine development. Vaccination as a tick control method has been practiced since the introduction of TickGARD and Gavac that were developed using the midgut glycoprotein Bm86 as antigen. Gavac within integrated tick management systems has proven to reduce the number of acaricidal applications per year that are required to control some strains of R. microplus ticks in different geographical regions. Nevertheless, it has limited or no efficacy against other tick species. These issues have stimulated research for additional tick protective antigens with critical functions in the tick. This chapter presents methodologies for the design and test of molecules as antigens against ticks. Considerations about different methods for the tick control compared to the immunological methods, the desirable characteristics for an anti-tick vaccine and the obstacles encountered for developing this kind of vaccines are discussed. Detailed methodologies for the establishment of a biological model to test new molecules as immunogens against ticks and to perform challenge trials with this model are presented. General considerations in the efficacy calculation for any anti-tick vaccine are also discussed.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, Avenue 31 between 158 and 190, P.O. Box 6162, Havana, 10600, Cuba.
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Rodríguez-Mallon A, Encinosa PE, Méndez-Pérez L, Bello Y, Rodríguez Fernández R, Garay H, Cabrales A, Méndez L, Borroto C, Estrada MP. High efficacy of a 20 amino acid peptide of the acidic ribosomal protein P0 against the cattle tick, Rhipicephalus microplus. Ticks Tick Borne Dis 2015; 6:530-7. [PMID: 25958782 DOI: 10.1016/j.ttbdis.2015.04.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 11/16/2022]
Abstract
Current strategies to control cattle ticks use integrated control programs (ICP) that include vaccination. Reduction in the use of chemicals and in the cost of tick control, the delay or elimination of acaricide resistance and the decreasing of environmental pollution are the advantages of using these programs. This integrated program is potentially applicable to all genotypes of chemical resistant ticks. However, the problem here is to improve the efficacy of anti-tick vaccines. The P0 protein is a structural component of the ribosome of all organisms. We have identified an immunogenic region of ribosomal protein P0 from Rhipicephalus spp. ticks that is not very conserved compared to the orthologous protein in their hosts. A synthetic 20 amino acid peptide from this sequence was effective as a vaccine against Rhipicephalus sanguineus infestations in an immunization and challenge experiment using rabbits. In this paper, the same peptide used as vaccine against the cattle tick Rhipicephalus Boophilus microplus shows a significant diminution in the number of engorged females recovered, in the weight of females and the weight of egg masses. The number of eggs hatched was also significantly reduced for the vaccinated group, with an overall effectivity for the antigen pP0 of 96%. These results, together with the conserved sequence of the P0 peptide among ticks, suggest that this antigen could be a good broad spectrum vaccine candidate. It would be expected to be active against many species of ticks and thus has promise in an ICP for effective control of ticks and thereby to improve the efficiency and productivity of the livestock industry.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba.
| | - Pedro E Encinosa
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Lídice Méndez-Pérez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Yamil Bello
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Rafmary Rodríguez Fernández
- Parasitology Department, National Laboratory for Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Havana, Cuba
| | - Hilda Garay
- Peptide Synthesis Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Ania Cabrales
- Peptide Synthesis Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Luis Méndez
- Parasitology Department, National Laboratory for Parasitology, Avenue San Antonio-Rincón, Km 1 1/2, Havana, Cuba
| | - Carlos Borroto
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
| | - Mario Pablo Estrada
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba
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Rodríguez-Mallon A, Fernández E, Encinosa PE, Bello Y, Méndez-Pérez L, Ruiz LC, Pérez D, González M, Garay H, Reyes O, Méndez L, Estrada MP. A novel tick antigen shows high vaccine efficacy against the dog tick, Rhipicephalus sanguineus. Vaccine 2012; 30:1782-9. [PMID: 22245603 DOI: 10.1016/j.vaccine.2012.01.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Revised: 01/03/2012] [Accepted: 01/04/2012] [Indexed: 11/28/2022]
Abstract
Ticks are acaridae ectoparasites that, while taking a blood meal, can transmit viruses, bacteria, protozoa and filarial nematodes, which cause a variety of human and animal illnesses. The use of chemical pesticides constitutes the primary measure for control of these ectoparasites. However, the intensive use of these chemicals has drawbacks such as the contamination of food, environmental pollution and development of resistance by ectoparasites. Vaccination is considered a promising alternative for controlling infestations by ectoparasites. Although emerging tick proteins have been identified recently, and have been proposed as potential targets for generating protective molecules, only a limited number of them have been evaluated in vaccine trials. More than 80 proteins are found in eukaryotic ribosomes. The protein P0 is essential for the assembly of the 60S ribosomal subunit. We have identified an immunogenic region of the ribosomal protein P0 from Rhipicephalus sp. ticks that is not very conserved compared to host P0. The efficacy of a 20 amino acid synthetic peptide from this sequence was assayed as a vaccine antigen against Rhipicephalus sanguineus infestations in an immunization and challenge experiment on rabbits. A remarkable diminution in the viability of newly molted nymphs from larvae fed on vaccinated rabbits was observed. The number of adults and the number of eggs hatching were significantly reduced, with an overall efficacy of 90%. Our results demonstrated that immunization with an immunogenic peptide of tick protein P0 greatly reduced survival of ticks, suggesting that it has promise as an effective tick control agent.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology, 31th Avenue and 190, P.O. Box 6162, Havana 10600, Cuba.
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Rodríguez-Mallon A, Cárdenas Y, Lugo JM, Oliva A, Morales A, Estrada MP. Competitive RT-PCR Strategy for Quantitative Evaluation of the Expression of Tilapia (Oreochromis niloticus) Growth Hormone Receptor Type I. Biol Proced Online 2009; 11:79-98. [PMID: 19495916 PMCID: PMC3055623 DOI: 10.1007/s12575-009-9002-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Accepted: 01/30/2009] [Indexed: 12/13/2022] Open
Abstract
Quantization of gene expression requires that an accurate measurement of a specific transcript is made. In this paper, a quantitative reverse transcription-polymerase chain reaction (RT-PCR) by competition for tilapia growth hormone receptor type I is designed and validated. This experimental procedure was used to determine the abundance of growth hormone receptor type I transcript in different tilapia tissues. The results obtained with this developed competitive RT-PCR were similar to real-time PCR results reported recently. This protocol provides a reliable alternative, but less expensive than real-time PCR to quantify specific genes.
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Affiliation(s)
- Alina Rodríguez-Mallon
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
| | - Yamilet Cárdenas
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
| | - Juana María Lugo
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
| | - Aymé Oliva
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
| | - Antonio Morales
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
| | - Mario Pablo Estrada
- Aquatic Biotechnology Department, Animal Biotechnology Division, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, 10 600, Cuba
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