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Calvo A, Pastor Y, Rosas-Val P, Gamazo C. Unveiling the immunomodulatory effect of the novel probiotic Akkermansia muciniphila and its protective effect in vitro. Microbiol Res 2024; 283:127677. [PMID: 38490028 DOI: 10.1016/j.micres.2024.127677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/26/2024] [Accepted: 03/05/2024] [Indexed: 03/17/2024]
Abstract
Akkermansia muciniphila, a bacterium found in the human microbiota, has gained interest due to its potential health benefits. Previous studies have linked its absence to inflammatory disorders, while also suggesting its role in maintaining a healthy gut barrier. However, there is limited information on its specific effects on the immune system. Therefore, the aim of this research was to analyze the in vitro response triggered by A. muciniphila employing RAW 264.7 macrophages. The study focused on investigating the production of cytokines and nitric oxide, along with evaluating the expression of inflammatory surface cellular markers. Additionally, we assessed its potential to protect against intestinal infections, using Salmonella enterica serovar Enteritidis as a model. Our findings reveal a modulation effect of A. muciniphila with pro-inflammatory features, including the release of pro-inflammatory cytokines and upregulation of CD40 and CD80 surface markers, in contrast with previous reported data. Importantly, A. muciniphila could protect against Salmonella infection by promoting macrophage activation, appearing as a promising probiotic candidate for the control of intestinal infections.
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Affiliation(s)
- Alba Calvo
- Department of Microbiology and Parasitology, University of Navarra, Pamplona 31008, Spain; IdiSNA, Navarra Institute for Health Research, Pamplona 31008, Spain
| | - Yadira Pastor
- Department of Microbiology and Parasitology, University of Navarra, Pamplona 31008, Spain; IdiSNA, Navarra Institute for Health Research, Pamplona 31008, Spain
| | - Pablo Rosas-Val
- Department of Microbiology and Parasitology, University of Navarra, Pamplona 31008, Spain
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, University of Navarra, Pamplona 31008, Spain; IdiSNA, Navarra Institute for Health Research, Pamplona 31008, Spain.
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Pastor Y, Calvo A, Salvador-Erro J, Gamazo C. Refining Immunogenicity through Intradermal Delivery of Outer Membrane Vesicles against Shigella flexneri in Mice. Int J Mol Sci 2023; 24:16910. [PMID: 38069232 PMCID: PMC10706920 DOI: 10.3390/ijms242316910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/23/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
Shigellosis remains a global health concern, especially in low- and middle-income countries. Despite improvements in sanitation, the absence of a licensed vaccine for human use has prompted global health organizations to support the development of a safe and effective multivalent vaccine that is cost-effective and accessible for limited-resource regions. Outer Membrane Vesicles (OMVs) have emerged in recent years as an alternative to live attenuated or whole-inactivated vaccines due to their immunogenicity and self-adjuvating properties. Previous works have demonstrated the safety and protective capacity of OMVs against Shigella flexneri infection in mouse models when administered through mucosal or intradermal routes. However, some immunological properties, such as the cellular response or cross-protection among different Shigella strains, remained unexplored. In this study, we demonstrate that intradermal immunization of OMVs with needle-free devices recruits a high number of immune cells in the dermis, leading to a robust cellular response marked by antigen-specific cytokine release and activation of effector CD4 T cells. Additionally, functional antibodies are generated, neutralizing various Shigella serotypes, suggesting cross-protective capacity. These findings highlight the potential of OMVs as a promising vaccine platform against shigellosis and support intradermal administration as a simple and painless vaccination strategy to address this health challenge.
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Affiliation(s)
| | | | | | - Carlos Gamazo
- Department of Microbiology and Parasitology, Navarra Medical Research Institute (IdiSNA), University of Navarra, 31008 Pamplona, Spain; (Y.P.); (A.C.); (J.S.-E.)
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3
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Berzosa M, Delgado-López A, Irache JM, Gamazo C. Optimization of Enterotoxigenic Escherichia coli (ETEC) Outer Membrane Vesicles Production and Isolation Method for Vaccination Purposes. Microorganisms 2023; 11:2088. [PMID: 37630648 PMCID: PMC10458947 DOI: 10.3390/microorganisms11082088] [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: 07/19/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
The study addresses Enterotoxigenic Escherichia coli (ETEC), a significant concern in low-income countries. Despite its prevalence, there is no licensed vaccine against ETEC. Bacterial vesicle-based vaccines are promising due to their safety and diverse virulence factors. However, cost-effective production requires enhancing vesicle yield while considering altered properties due to isolation methods. The proposed method involves heat treatment and ultrafiltration to recover vesicles from bacterial cultures. Two vesicle types, collected from heat-treated (HT-OMV) or untreated (NT-OMV) cultures, were compared. Vesicles were isolated via ultrafiltration alone ("complete") or with ultracentrifugation ("sediment"). Preliminary findings suggest complete HT-OMV vesicles are suitable for an ETEC vaccine. They express important proteins (OmpA, OmpX, OmpW) and virulence factors (adhesin TibA). Sized optimally (50-200 nm) for mucosal vaccination, they activate macrophages, inducing marker expression (CD40, MHCII, CD80, CD86) and Th1/Th2 cytokine release (IL-6, MCP-1, TNF-α, IL12p70, IL-10). This study confirms non-toxicity in RAW 264.7 cells and the in vivo ability of complete HT-OMV to generate significant IgG2a/IgG1 serum antibodies. Results suggest promise for a cost-effective ETEC vaccine, requiring further research on in vivo toxicity, pathogen-specific antibody detection, and protective efficacy.
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Affiliation(s)
- Melibea Berzosa
- Department of Microbiology and Parasitology, Navarra Medical Research Institute (IdiSNA), University of Navarra, 31008 Pamplona, Spain
| | - Alberto Delgado-López
- Department of Microbiology and Parasitology, Navarra Medical Research Institute (IdiSNA), University of Navarra, 31008 Pamplona, Spain
| | - Juan Manuel Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, 31008 Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Navarra Medical Research Institute (IdiSNA), University of Navarra, 31008 Pamplona, Spain
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Rosas-Val P, Adhami M, Brotons-Canto A, Gamazo C, Irache JM, Larrañeta E. 3D printing of microencapsulated Lactobacillus rhamnosus for oral delivery. Int J Pharm 2023; 641:123058. [PMID: 37207858 DOI: 10.1016/j.ijpharm.2023.123058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/21/2023]
Abstract
3D Printing is an innovative technology within the pharma and food industries that allows the design and manufacturing of novel delivery systems. Orally safe delivery of probiotics to the gastrointestinal tract faces several challenges regarding bacterial viability, in addition to comply with commercial and regulatory standpoints. Lactobacillus rhamnosus CNCM I-4036 (Lr) was microencapsulated in generally recognised as safe (GRAS) proteins, and then assessed for robocasting 3D printing. Microparticles (MP-Lr) were developed and characterised, prior to being 3D printed with pharmaceutical excipients. MP-Lr showed a size of 12.3 ± 4.1 µm and a non-uniform wrinkled surface determined by Scanning Electron Microscopy (SEM). Bacterial quantification by plate counting accounted for 8.68 ±0.6 CFU/g of live bacteria encapsulated within. Formulations were able to keep the bacterial dose constant upon contact with gastric and intestinal pH. Printlets consisted in oval-shape formulations (15 mm × 8 mm × 3.2 mm) of ca. 370 mg of total weight, with a uniform surface. After the 3D printing process, bacterial viability remained even as MP-Lr protected bacteria alongside the process (log reduction of 0.52, p>0.05) in comparison with non-encapsulated probiotic (log reduction of 3.05). Moreover, microparticle size was not altered during the 3D printing process. We confirmed the success of this technology for developing an orally safe formulation, GRAS category, of microencapsulated Lr for gastrointestinal vehiculation.
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Affiliation(s)
- Pablo Rosas-Val
- Nucaps Nanotechnology S.L., Spain; Department of Microbiology & Parasitology, University of Navarra, Spain
| | | | | | - Carlos Gamazo
- Department of Microbiology & Parasitology, University of Navarra, Spain
| | - Juan M Irache
- Department of Technology & Pharmaceutical Chemistry, University of Navarra, Spain
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Peñalva R, Martínez-López AL, Gamazo C, Gonzalez-Navarro CJ, González-Ferrero C, Virto-Resano R, Brotons-Canto A, Vitas AI, Collantes M, Peñuelas I, Irache JM. Encapsulation of Lactobacillus plantarum in casein-chitosan microparticles facilitates the arrival to the colon and develops an immunomodulatory effect. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Berzosa M, Pastor Y, Gamazo C, Irache JM. Development of a Bacterial Nanoparticle Vaccine Against Escherichia coli. Methods Mol Biol 2022; 2410:357-365. [PMID: 34914057 DOI: 10.1007/978-1-0716-1884-4_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Currently, different subunit-based vaccine strategies against enterobacteria are being investigated. Among those, bacterial outer membrane vesicles (OMV) are promising candidates because of their immunogenic properties and safety. In order to develop an effective vaccine against this kind of pathogens, it is important to induce both systemic and mucosal immunity. For that reason, the oral route of administration would be an adequate option; although it still represents a challenge due to the particular and harsh conditions of the gut. To overcome these inconveniences, different strategies have been proposed, including the use of polymeric nanoparticles based on the copolymer between methyl vinyl ether and maleic anhydride (Gantrez AN). In the present work, a simple procedure for the preparation of heat-induced OMV (named as HT) obtained from Enterotoxigenic Escherichia coli (ETEC) loaded into these poly(anhydride) nanoparticles is described.
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Affiliation(s)
- Melibea Berzosa
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, Pamplona, Spain
| | - Yadira Pastor
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, Pamplona, Spain.
| | - Juan Manuel Irache
- Department of Technology and Pharmaceutical Chemistry, University of Navarra, Pamplona, Spain
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Berzosa M, Nemeskalova A, Zúñiga-Ripa A, Salvador-Bescós M, Larrañeta E, Donnelly RF, Gamazo C, Irache JM. Immune Response after Skin Delivery of a Recombinant Heat-Labile Enterotoxin B Subunit of Enterotoxigenic Escherichia coli in Mice. Pharmaceutics 2022; 14:pharmaceutics14020239. [PMID: 35213971 PMCID: PMC8875158 DOI: 10.3390/pharmaceutics14020239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 12/27/2021] [Revised: 01/18/2022] [Accepted: 01/18/2022] [Indexed: 02/07/2023] Open
Abstract
Enterotoxigenic Escherichia coli (ETEC) infections have been identified as a major cause of acute diarrhoea in children in developing countries, associated with substantial morbidity and mortality rates. Additionally, ETEC remains the most common cause of acute diarrhea of international travellers to endemic areas. The heat-labile toxin (LT) is a major virulence factor of ETEC, with a significant correlation between the presence of antibodies against LT and protection in infected patients. In the present work, we constructed a recombinant LTB unit (rLTB) and studied the capacity of this toxoid incorporated in microneedles (rLTB-MN) to induce a specific immune response in mice. MN were prepared from aqueous blends of the polymer Gantrez AN® [poly (methyl vinyl ether-co-maleic anhydride)], which is not cytotoxic and has been shown to possess immunoadjuvant properties. The mechanical and dissolution properties of rLTB-MNs were evaluated in an in vitro Parafilm M® model and in mice and pig skin ex vivo models. The needle insertion ranged between 378 µm and 504 µm in Parafilm layers, and MNs fully dissolved within 15 min of application inside porcine skin. Moreover, female and male BALB/c mice were immunized through ear skin with one single dose of 5 μg·rLTB in MNs, eliciting significant fecal anti-LT IgA antibodies, higher in female than in male mice. Moreover, we observed an enhanced production of IL-17A by spleen cells in the immunized female mice, indicating a mucosal non-inflammatory and neutralizing mediated response. Further experiments will now be required to validate the protective capacity of this new rLTB-MN formulation against this deadly non-vaccine-preventable disease.
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Affiliation(s)
- Melibea Berzosa
- Department of Microbiology and Parasitology, Institute of Tropical Health, IDISNA, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.Z.-R.); (M.S.-B.)
| | - Alzbeta Nemeskalova
- Department of Microbiology and Parasitology, Institute of Tropical Health, IDISNA, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.Z.-R.); (M.S.-B.)
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Amaia Zúñiga-Ripa
- Department of Microbiology and Parasitology, Institute of Tropical Health, IDISNA, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.Z.-R.); (M.S.-B.)
| | - Miriam Salvador-Bescós
- Department of Microbiology and Parasitology, Institute of Tropical Health, IDISNA, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.Z.-R.); (M.S.-B.)
| | - Eneko Larrañeta
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (E.L.); (R.F.D.)
| | - Ryan F. Donnelly
- Medical Biology Centre, School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (E.L.); (R.F.D.)
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Institute of Tropical Health, IDISNA, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.Z.-R.); (M.S.-B.)
- Correspondence: (C.G.); (J.M.I.)
| | - Juan M. Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, 31008 Pamplona, Spain
- Correspondence: (C.G.); (J.M.I.)
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8
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Berzosa M, Nemeskalova A, Calvo A, Quincoces G, Collantes M, Pareja F, Gamazo C, Irache JM. Oral Immunogenicity of Enterotoxigenic Escherichia coli Outer Membrane Vesicles Encapsulated into Zein Nanoparticles Coated with a Gantrez ® AN-Mannosamine Polymer Conjugate. Pharmaceutics 2022; 14:123. [PMID: 35057017 PMCID: PMC8780369 DOI: 10.3390/pharmaceutics14010123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/07/2021] [Accepted: 12/28/2021] [Indexed: 12/24/2022] Open
Abstract
Enterotoxigenic Escherichia coli (ETEC) represents a major cause of morbidity and mortality in the human population. In particular, ETEC infections affect children under the age of five from low-middle income countries. However, there is no licensed vaccine against this pathogen. ETEC vaccine development is challenging since this pathotype expresses a wide variety of antigenically diverse virulence factors whose genes can be modified due to ETEC genetic plasticity. To overcome this challenge, we propose the use of outer membrane vesicles (OMVs) isolated from two ETEC clinical strains. In these OMVs, proteomic studies revealed the presence of important immunogens, such as heat-labile toxin, colonization factors, adhesins and mucinases. Furthermore, these vesicles proved to be immunogenic after subcutaneous administration in BALB/c mice. Since ETEC is an enteropathogen, it is necessary to induce both systemic and mucosal immunity. For this purpose, the vesicles, free or encapsulated in zein nanoparticles coated with a Gantrez®-mannosamine conjugate, were administered orally. Biodistribution studies showed that the encapsulation of OMVs delayed the transit through the gut. These results were confirmed by in vivo study, in which OMV encapsulation resulted in higher levels of specific antibodies IgG2a. Further studies are needed to evaluate the protection efficacy of this vaccine approach.
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Affiliation(s)
- Melibea Berzosa
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.C.); (C.G.)
| | - Alzbeta Nemeskalova
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.C.); (C.G.)
- Department of Analytical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Alba Calvo
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.C.); (C.G.)
| | - Gemma Quincoces
- Department of Nuclear Medicine, Clínica Universidad de Navarra, 31008 Pamplona, Spain; (G.Q.); (M.C.); (F.P.)
| | - María Collantes
- Department of Nuclear Medicine, Clínica Universidad de Navarra, 31008 Pamplona, Spain; (G.Q.); (M.C.); (F.P.)
| | - Felix Pareja
- Department of Nuclear Medicine, Clínica Universidad de Navarra, 31008 Pamplona, Spain; (G.Q.); (M.C.); (F.P.)
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (M.B.); (A.N.); (A.C.); (C.G.)
| | - Juan Manuel Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, 31008 Pamplona, Spain
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9
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Abstract
A simple procedure for obtaining outer membrane vesicles from Salmonella enterica and the use of hydrogels as vaccine delivery system is described. A heat treatment in saline solution of whole bacteria rendered the release of outer membrane vesicles containing relevant antigenic components. The immunogenicity of these antigens when administered by the intranasal route may be improved after embedment into hydrogels to increase residence half-time and thus activate the mucosal immune system.
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Affiliation(s)
- Yadira Pastor
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Isaiah Ting
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Melibea Berzosa
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Juan M Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology, University of Navarra, Pamplona, Spain.
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Matías J, Pastor Y, Irache JM, Gamazo C. Protective Passive Immunity in Escherichia coli ETEC-Challenged Neonatal Mice Conferred by Orally Immunized Dams with Nanoparticles Containing Homologous Outer Membrane Vesicles. Vaccines (Basel) 2020; 8:vaccines8020286. [PMID: 32521603 PMCID: PMC7350024 DOI: 10.3390/vaccines8020286] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 11/17/2022] Open
Abstract
Enterotoxigenic Escherichia coli (ETEC) strains are a major cause of illness and death in mammals, including neonatal, recently weaned pigs and infant human beings. We have previously shown that outer membrane vesicles (OMV) obtained from ETEC serotypes encapsulated into zein nanoparticles, coated with a Gantrez-mannosamine polymer conjugate (OMV-NP), were immunogenic in mice and sows. In the present study, we show that pups from vaccinated mice were protected against ETEC F4 serotype challenge through maternal passive immunization. OMV from F4 cultures were collected and characterized. Two-week-pregnant BALB/c mice were orally immunized with a single dose of vesicles (0.2 mg) either free (OMV) or encapsulated into nanoparticles (OMV-NP). Evaluation of the antibodies in serum (IgG1, Ig2a or IgA) and feces (IgA) of dams immunized with OMV-NP revealed an enhancement of specific immunogenicity. The antibody response conferred by the nanoparticle adjuvant was also correlated with IL-6 and IL-10 splenic levels. Each mother was allowed to feed her progeny for one week. Suckling pups presented specific IgA in feces demonstrating their passive immunization through colostrum intake. Two weeks after the pups were born, they were infected orally with a single dose of F4 E. coli (1.2 × 108 CFU/pup). Results showed that 70% of the pups from dams immunized with OMV-NP were protected. In contrast, 80% of the pups from dams immunized with free OMV died as a result of the experimental challenge. These findings support the use of zein nanoparticles coated with a Gantrez-mannosamine shield as adjuvant delivery system for the oral immunization during pregnancy to confer immunity to the offspring through maternal immunization
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Affiliation(s)
- Jose Matías
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (J.M.); (Y.P.)
| | - Yadira Pastor
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (J.M.); (Y.P.)
| | - Juan M. Irache
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, 31008 Pamplona, Spain;
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain; (J.M.); (Y.P.)
- Correspondence:
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11
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Pastor Y, Ting I, Martínez AL, Irache JM, Gamazo C. Intranasal delivery system of bacterial antigen using thermosensitive hydrogels based on a Pluronic-Gantrez conjugate. Int J Pharm 2020; 579:119154. [PMID: 32081801 DOI: 10.1016/j.ijpharm.2020.119154] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/12/2020] [Accepted: 02/15/2020] [Indexed: 02/07/2023]
Abstract
Thermosensitive hydrogels have been studied as feasible needle-avoidance alternative to vaccine delivery. In this work, we report the development of a new thermal-sensitive hydrogel for intranasal vaccine delivery. This delivery system was formulated with a combination of the polymer Gantrez® AN119 and the surfactant Pluronic® F127 (PF127), with a high biocompatibility, biodegradability and immunoadjuvant properties. Shigella flexneri outer membrane vesicles were used as the antigen model. A stable and easy-to-produce thermosensitive hydrogel which allowed the incorporation of the OMV-antigenic complex was successfully synthetized. A rapid gel formation was achieved at body temperature, which prolonged the OMV-antigens residence time in the nasal cavity of BALB/c mice when compared to intranasal delivery of free-OMVs. In addition, the bacterial antigens showed a fast release profile from the hydrogel in vitro, with a peak at 30 min of incubation at 37 °C. Hydrogels appeared to be non-cytotoxic in the human epithelial HeLa cell line and nose epithelium as well, as indicated by the absence of histopathological features. Immunohistochemical studies revealed that after intranasal administration the OMVs reached the nasal associated lymphoid tissue. These results support the use of here described thermosensitive hydrogels as a potential platform for intranasal vaccination.
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Affiliation(s)
- Yadira Pastor
- Department of Microbiology and Parasitology, Institute of Tropical Health University of Navarra, 31008 Pamplona, Spain
| | - Isaiah Ting
- Department of Microbiology and Parasitology, Institute of Tropical Health University of Navarra, 31008 Pamplona, Spain
| | - Ana Luisa Martínez
- Department of Technology and Pharmaceutical Chemistry, University of Navarra, Spain
| | - Juan Manuel Irache
- Department of Technology and Pharmaceutical Chemistry, University of Navarra, Spain
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, Institute of Tropical Health University of Navarra, 31008 Pamplona, Spain.
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12
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Pastor Y, Camacho AI, Zúñiga-Ripa A, Merchán A, Rosas P, Irache JM, Gamazo C. Towards a subunit vaccine from a Shigella flexneri ΔtolR mutant. Vaccine 2018; 36:7509-7519. [PMID: 30420041 DOI: 10.1016/j.vaccine.2018.10.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 05/17/2018] [Revised: 09/12/2018] [Accepted: 10/17/2018] [Indexed: 11/24/2022]
Abstract
Disruption of one or more components of the Tol-Pal system, involved in maintaining the integrity of the outer membrane of Gram-negative bacteria, has been proposed as a method to increase the yield obtained from natural production of outer membrane vesicles (OMV). We present a new OMV-based product, obtained from genetically modified Shigella flexneri 2a with a non-polar deletion in tolR and heat-inactivated (HT-ΔtolR). The S. flexneri ΔtolR strain lead to a higher release of vesicles, more than 8-times when compared to the yield obtained from chemically inactivated wild type strain. S. flexneri mutant strain appeared to be more sensitive to different chemical compounds, including antibiotics, bile salts or human complement and it was also less virulent in both in vitro and in vivo assays. The mutation produced some changes in the LPS O-chain and protein expression. S. flexneri ΔtolR was enriched in long and very long LPS O-chain and expressed a different pattern of surface proteins or lipoproteins. In vitro toxicity and activation properties were determined in Raw 267.4 macrophage cell line. HT-ΔtolR antigenic complex was non-cytotoxic and activation markers, such as MHC-II or CD40, were highly expressed during incubation with this product. Finally, preliminary studies on the antibody response elicited by HT-ΔtolR demonstrated a robust and diverse response in mice. Considering these promising results, HT-ΔtolR antigenic extract appears as a new potential vaccine candidate to face shigellosis.
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Affiliation(s)
- Yadira Pastor
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Ana Isabel Camacho
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Amaia Zúñiga-Ripa
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Aritz Merchán
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Pablo Rosas
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Juan M Irache
- Department of Pharmaceutical Technology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology, Institute of Tropical Health - University of Navarra, 31008 Pamplona, Spain.
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Abstract
Allergic diseases are reaching epidemic proportions in developed countries. In particular, food allergy is increasing in prevalence and severity, thus becoming an important socioeconomic burden. Numerous cell types and cell populations, which form an intricate and balanced network, are involved in an immune response. This balance is occasionally disturbed, leading to the onset of different diseases, such as allergic diseases. Antihistamines and corticosteroids provide some degree of relief from the symptoms of allergic conditions. However, the only treatment that can revert the disease is immunotherapy. Nevertheless, specific immunotherapy has at least 2 major drawbacks: it is time-consuming, and it can produce local and even systemic allergic side effects. Immunotherapy's potential goes beyond our current knowledge of the immune response; nevertheless, we can still design strategies to reach a safer immune modulation for treating allergies. This review deals with the use of adjuvants to reduce the undesirable side effects associated with specific allergen immunotherapy. For example, nanoparticles used as immunoadjuvants are offering promising results in preclinical assays.
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Affiliation(s)
- Carlos Gamazo
- a Dept. Microbiology , Instituto de Investigación Sanitaria de Navarra (Idisna), University of Navarra , Pamplona , Spain
| | - Carmen D'Amelio
- b Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Gabriel Gastaminza
- c Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Marta Ferrer
- d Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Juan M Irache
- e Dept. Pharmacy and Pharmaceutical Technology , University of Navarra , Pamplona , Spain
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Brotons-Canto A, Gamazo C, Martín-Arbella N, Abdulkarim M, Matías J, Gumbleton M, Irache JM. Evaluation of nanoparticles as oral vehicles for immunotherapy against experimental peanut allergy. Int J Biol Macromol 2018; 110:328-335. [DOI: 10.1016/j.ijbiomac.2017.09.109] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 09/27/2017] [Indexed: 01/07/2023]
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Matías J, Berzosa M, Pastor Y, Irache JM, Gamazo C. Maternal Vaccination. Immunization of Sows during Pregnancy against ETEC Infections. Vaccines (Basel) 2017; 5:vaccines5040048. [PMID: 29211052 PMCID: PMC5748614 DOI: 10.3390/vaccines5040048] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/20/2017] [Accepted: 12/03/2017] [Indexed: 12/18/2022] Open
Abstract
The immunology of pregnancy is an evolving consequence of multiple reciprocal interactions between the maternal and the fetal-placental systems. The immune response must warrant the pregnancy outcome (including tolerance to paternal antigens), but at the same time, efficiently respond to pathogenic challenges. Enterotoxigenic Escherichia coli (ETEC) strains are a major cause of illness and death in neonatal and recently weaned pigs. This review aims to give an overview of the current rationale on the maternal vaccination strategies for the protection of the newborn pig against ETEC. Newborn piglets are immunodeficient and naturally dependent on the maternal immunity transferred by colostrum for protection—a maternal immunity that can be obtained by vaccinating the sow during pregnancy. Our current knowledge of the interactions between the pathogen strategies, virulence factors, and the host immune system is aiding the better design of vaccination strategies in this particular and challenging host status. Challenges include the need for better induction of immunity at the mucosal level with the appropriate use of adjuvants, able to induce the most appropriate and long-lasting protective immune response. These include nanoparticle-based adjuvants for oral immunization. Experiences can be extrapolated to other species, including humans.
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Affiliation(s)
- Jose Matías
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (IDISNA), C/Irunlarrea, 1, 31080 Pamplona, Spain.
| | - Melibea Berzosa
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (IDISNA), C/Irunlarrea, 1, 31080 Pamplona, Spain.
| | - Yadira Pastor
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (IDISNA), C/Irunlarrea, 1, 31080 Pamplona, Spain.
| | - Juan M Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (IDISNA), C/Irunlarrea, 1, 31080 Pamplona, Spain.
| | - Carlos Gamazo
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (IDISNA), C/Irunlarrea, 1, 31080 Pamplona, Spain.
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Tamayo I, Gamazo C, de Souza Rebouças J, Irache JM. Topical immunization using a nanoemulsion containing bacterial membrane antigens. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Gamazo C, García-Azpíroz M, Souza Rebouças JD, Gastaminza G, Ferrer M, Irache JM. Oral immunotherapy using polymeric nanoparticles loaded with peanut proteins in a murine model of fatal anaphylaxis. Immunotherapy 2017; 9:1205-1217. [DOI: 10.2217/imt-2017-0111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Carlos Gamazo
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (Idisna), C/Irunlarrea, 1; 31080 - Pamplona, Spain
| | - Maddi García-Azpíroz
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (Idisna), C/Irunlarrea, 1; 31080 - Pamplona, Spain
| | - Juliana De Souza Rebouças
- Department of Microbiology, University of Navarra, Instituto de Investigación Sanitaria de Navarra (Idisna), C/Irunlarrea, 1; 31080 - Pamplona, Spain
- Laboratory of Microbiology & Immunoregulation, Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Brazil
| | - Gabriel Gastaminza
- Department of Allergology & Clinical Immunology, Clínica Universidad de Navarra, Navarra, Spain
| | - Marta Ferrer
- Department of Allergology & Clinical Immunology, Clínica Universidad de Navarra, Navarra, Spain
| | - Juan M Irache
- Department of Pharmacy & Pharmaceutical Technology, University of Navarra, Navarra, Spain
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Pastor Y, Camacho A, Gil AG, Ramos R, Ceráin ALD, Peñuelas I, Irache JM, Gamazo C. Effective protection of mice against Shigella flexneri with a new self-adjuvant multicomponent vaccine. J Med Microbiol 2017; 66:946-958. [PMID: 28721849 DOI: 10.1099/jmm.0.000527] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
PURPOSE The aim of this study was to develop an immunogenic protective product against Shigella flexneri by employing a simple and safe heat treatment-based strategy. METHODOLOGY The physicochemical characteristics of naturally produced (OMV) and heat-induced (HT) outer-membrane vesicles from S. flexneri were examined, including a comparison of the protein content of the products. Toxicological and biodistribution studies, and a preliminary experiment to examine the protective effectiveness of HT in a murine model of S. flexneri infection, were also included. RESULTS This method simultaneously achieves complete bacterial inactivation and the production of the HT vaccine product, leading to a safe working process. The obtained HT complex presented a similar morphology (electron microscopy) and chemical composition to the classical OMV, although it was enriched in some immunogens, such as lipoproteins, OmpA or OmpC, among others. The HT formulation was not toxic and biodistribution studies performed in mice demonstrated that the vaccine product remained in the small intestine after nasal administration. Finally, a single dose of HT administered nasally was able to protect mice against S. flexneri 2a. CONCLUSION The convenient and safe manufacturing process, and the preliminary biological evaluation, support the use of the self-adjuvanted HT complex as a new vaccine candidate to face shigellosis. Further development is required, such as additional immune analyses, to evaluate whether this new subunit vaccine can be useful in achieving full protection against Shigella.
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Affiliation(s)
- Yadira Pastor
- Department of Microbiology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
| | - Ana Camacho
- Department of Microbiology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
| | - Ana Gloria Gil
- Department of Toxicology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
| | - Rocío Ramos
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Institute of Tropical Health, University of Navarra 31008, Pamplona, Spain
| | - Adela López de Ceráin
- Department of Toxicology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
| | - Iván Peñuelas
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Institute of Tropical Health, University of Navarra 31008, Pamplona, Spain
| | - Juan M Irache
- Department of Pharmaceutical Technology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology, Institute of Tropical Health, University of Navarra, 31008 Pamplona, Spain
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Sabaeifard P, Abdi-Ali A, Gamazo C, Irache JM, Soudi MR. Improved effect of amikacin-loaded poly(D,L-lactide-co-glycolide) nanoparticles against planktonic and biofilm cells of Pseudomonas aeruginosa. J Med Microbiol 2017; 66:137-148. [DOI: 10.1099/jmm.0.000430] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Parastoo Sabaeifard
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
- Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Ahya Abdi-Ali
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain
| | - Juan Manuel Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Mohammad Reza Soudi
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
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Penalva R, González-Navarro CJ, Gamazo C, Esparza I, Irache JM. Zein nanoparticles for oral delivery of quercetin: Pharmacokinetic studies and preventive anti-inflammatory effects in a mouse model of endotoxemia. Nanomedicine: Nanotechnology, Biology and Medicine 2017; 13:103-110. [DOI: 10.1016/j.nano.2016.08.033] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 07/18/2016] [Accepted: 08/29/2016] [Indexed: 10/21/2022]
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Braz L, Grenha A, Ferreira D, Rosa da Costa AM, Gamazo C, Sarmento B. Chitosan/sulfated locust bean gum nanoparticles: In vitro and in vivo evaluation towards an application in oral immunization. Int J Biol Macromol 2016; 96:786-797. [PMID: 28049014 DOI: 10.1016/j.ijbiomac.2016.12.076] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 11/11/2016] [Revised: 12/11/2016] [Accepted: 12/30/2016] [Indexed: 01/02/2023]
Abstract
This work proposes the design of nanoparticles based on locus bean gum (LBG) and chitosan to be used as oral immunoadjuvant for vaccination purposes. LBG-based nanoparticles were prepared by mild polyelectrolyte complexation between chitosan (CS) and a synthesized LBG sulfate derivative (LBGS). Morphological characterization suggested that nanoparticles present a solid and compact structure with spherical-like shape. Sizes around 180-200nm and a positive surface charge between +9mV and +14mV were obtained. CS/LBGS nanoparticles did not affect cell viability of Caco-2 cells after 3h and 24h of exposure when tested at concentrations up to 1.0mg/mL. Two model antigens (a particulate acellular extract HE of Salmonella enterica serovar Enteritidis, and ovalbumin as soluble antigen) were associated to CS/LBGS nanoparticles with efficiencies around 26% for ovalbumin and 32% for HE, which resulted in loading capacities up to 12%. The process did not affect the antigenicity of the associated antigens. BALB/c mice were orally immunized with ovalbumin-loaded nanoparticles (100μg), and results indicate an adjuvant effect of the CS/LBGS nanoparticles, eliciting a balanced Th1/Th2 immune response. Thus, CS/LBGS nanoparticles are promising as antigen mucosal delivery strategy, with particular interest for oral administration.
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Affiliation(s)
- Luis Braz
- CIQA-Centre of Research in Chemistry of Algarve, Faculty of Sciences and Technology, Campus de Gambelas, 8005-139 Faro, Portugal; School of Health-University of Algarve, Avenida Dr. Adelino da Palma Carlos, 8000-510 Faro, Portugal; Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal; CBMR-Centre for Biomedical Research, University of Algarve, Faculty of Sciences and Technology, Campus de Gambelas, 8005-139 Faro, Portugal.
| | - Ana Grenha
- CBMR-Centre for Biomedical Research, University of Algarve, Faculty of Sciences and Technology, Campus de Gambelas, 8005-139 Faro, Portugal; CCMAR-Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Domingos Ferreira
- UCIBIO, REQUIMTE, Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Ana M Rosa da Costa
- CIQA-Centre of Research in Chemistry of Algarve, Faculty of Sciences and Technology, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Carlos Gamazo
- Department of Microbiology, University of Navarra, 31008 Pamplona, Spain
| | - Bruno Sarmento
- i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; INEB, Instituto de Engenharia Biomédica, Biocarrier Group, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra, 1317, 4585-116 Gandra, Portugal.
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García-Talavera P, Díaz-Soto G, Montes A, Villanueva J, Cobo A, Gamazo C, Ruiz M, González-Selma M. Contribution of early SPECT/CT to 99mTc-MIBI double phase scintigraphy in primary hyperparathyroidism: Diagnostic value and correlation between uptake and biological parameters. Rev Esp Med Nucl Imagen Mol 2016. [DOI: 10.1016/j.remnie.2016.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
INTRODUCTION Allergic diseases constitute one of the most common causes of chronic illness in developed countries. The main mechanism determining allergy is an imbalance between Th1 and Th2 response towards Th2. AREAS COVERED This review describes the mechanisms underlying the natural tolerance to food components and the development of an allergic response in sensitized individuals. Furthermore, therapeutic approaches proposed to manage these abnormal immunologic responses food are also presented and discussed. EXPERT OPINION In the past, management of food allergies has consisted of the education of patients to avoid the ingestion of the culprit food and to initiate the therapy (e.g. self-injectable epinephrine) in case of accidental ingestion. In recent years, sublingual/oral immunotherapies based on the continuous administration of small amounts of the allergen have been developed. However, the long periods of time needed to obtain significant desensitization and the generation of adverse effects, limit their use. In order to solve these drawbacks, strategies to induce tolerance are being studied, such as the use of either adjuvant immunotherapy in order to facilitate the reversion of the Th2 response towards Th1 or the use of monoclonal antibodies to block the main immunogenic elements.
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Affiliation(s)
- Ana Brotons-Canto
- a Department of Pharmacy and Pharmaceutical Technology , University of Navarra , Pamplona , Spain
| | - Nekane Martín-Arbella
- a Department of Pharmacy and Pharmaceutical Technology , University of Navarra , Pamplona , Spain
| | - Carlos Gamazo
- b Department of Microbiology , University of Navarra , Pamplona , Spain
| | - Juan M Irache
- a Department of Pharmacy and Pharmaceutical Technology , University of Navarra , Pamplona , Spain
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Sabaeifard P, Abdi-Ali A, Soudi MR, Gamazo C, Irache JM. Amikacin loaded PLGA nanoparticles against Pseudomonas aeruginosa. Eur J Pharm Sci 2016; 93:392-8. [PMID: 27575877 DOI: 10.1016/j.ejps.2016.08.049] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 06/01/2016] [Revised: 08/23/2016] [Accepted: 08/25/2016] [Indexed: 01/19/2023]
Abstract
Amikacin is a very effective aminoglycoside antibiotic but according to its high toxicity, the use of this antibiotic has been limited. The aim of this study was to formulate and characterize amikacin loaded PLGA nanoparticles. Nanoparticles were synthetized using a solid-in-oil-in-water emulsion technique with different ratio of PLGA 50:50 (Resomer 502H) to drug (100:3.5, 80:3.5 and 60:3.5), two different concentrations of stabilizer (pluronic F68) (0.5% or 1%) and varied g forces to recover the final products. The most efficient formulation based on drug loading (26.0±1.3μg/mg nanoparticle) and encapsulation efficiency (76.8±3.8%) was the one obtained with 100:3.5 PLGA:drug and 0.5% luronic F68, recovered by 20,000×g for 20min. Drug release kinetic study indicated that about 50% of the encapsulated drug was released during the first hour of incubation in phospahte buffer, pH7.4, 37°C, 120rpm. Using different cell viability/cytotoxicity assays, the optimized formulation showed no toxicity against RAW macrophages after 2 and 24h of exposure. Furthermore, released drug was active and maintained its bactericidal activity against Pseudomonas aeruginosa in vitro. These results support the effective utilization of the PLGA nanoparticle formulation for amikacin in further in vivo studies.
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Affiliation(s)
- Parastoo Sabaeifard
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran; Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain; Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Ahya Abdi-Ali
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Mohammad Reza Soudi
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Carlos Gamazo
- Department of Microbiology and Parasitology, University of Navarra, Pamplona, Spain.
| | - Juan Manuel Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
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Barón J, Mulero P, Pedraza M, Gamazo C, de la Cruz C, Ruiz M, Ayuso M, Cebrián M, García-Talavera P, Marco J, Guerrero A. HaNDL syndrome: Correlation between focal deficits topography and EEG or SPECT abnormalities in a series of 5 new cases. Neurología (English Edition) 2016. [DOI: 10.1016/j.nrleng.2015.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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García-Talavera P, Díaz-Soto G, Montes AA, Villanueva JG, Cobo A, Gamazo C, Ruiz MÁ, González-Selma ML. Contribution of early SPECT/CT to 99mTc-MIBI double phase scintigraphy in primary hyperparathyroidism: Diagnostic value and correlation between uptake and biological parameters. Rev Esp Med Nucl Imagen Mol 2016; 35:351-357. [PMID: 27132216 DOI: 10.1016/j.remn.2016.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 01/10/2016] [Revised: 02/11/2016] [Accepted: 03/01/2016] [Indexed: 11/17/2022]
Abstract
AIM To evaluate the value of 99mTc-MIBI double-phase scintigraphy (DPS) and early SPECT/CT in the pre-surgical assessment of patients with primary hyperparathyroidism (PHPT). Also, to calculate the correlation between uptake and some biological parameters. MATERIAL AND METHODS Forty patients with PHPT were included: 37 solitary adenomas, 1 hyperplasia, and 2 double adenomas. Fifteen patients had ectopic glands. DPS and early SPECT/CT were acquired in all patients. Ultrasound was performed in 31/40. All patients underwent surgery, intra-operative iPTH measurements, and histopathological examinations. Qualitative DPS uptake was assessed and correlated to pre-surgical calcium, iPTH levels, gland weight, and maximum diameter. RESULTS In the planar study, there were 23 positive cases, 8 doubtful, and 9 negatives. With the SPECT/CT, 8/9 negatives cases were located. All doubtful cases were confirmed as positives. Gland location improved in 16 cases (12 ectopic). DPS+SPECT/CT failed to detect a solitary adenoma and at least one gland in three cases of multiglandular disease (MGD). The sensitivity by patient was: DPS 72.5%, DPS+SPECT/CT 90%, and ultrasound 42%. Ultrasound and scintigraphy (DPS+SPECT/CT) were concordant in 16/31 patients. For the rest of them, scintigraphy proved correct in 14/15, and both techniques failed in one case. There was a significant correlation between level of uptake and iPTH level, gland weight, and maximum diameter. CONCLUSION Early SPECT/CT improves sensitivity and the locating of parathyroid pathological glands and increases diagnostic confidence. iPTH level, glandular size, and weight are related to the qualitative assessment of 99mTc-MIBI uptake in early DPS.
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Affiliation(s)
- P García-Talavera
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Salamanca, Salamanca, Spain.
| | - G Díaz-Soto
- Servicio de Endocrinología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - A A Montes
- Servicio de Radiodiagnóstico, Hospital Universitario Río Hortega, Valladolid, Spain
| | - J G Villanueva
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - A Cobo
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - C Gamazo
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - M Á Ruiz
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - M L González-Selma
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
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Gamazo C, Bussmann H, Giemsa S, Camacho A, Unsihuay D, Martín-Arbella N, Irache J. Interactions of poly (anhydride) nanoparticles with macrophages in light of their vaccine adjuvant properties. Int J Pharm 2015; 496:922-30. [DOI: 10.1016/j.ijpharm.2015.10.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/05/2015] [Accepted: 10/07/2015] [Indexed: 01/12/2023]
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Gamazo C, Martín-Arbella N, Brotons A, Camacho AI, Irache JM. Mimicking microbial strategies for the design of mucus-permeating nanoparticles for oral immunization. Eur J Pharm Biopharm 2015; 96:454-63. [PMID: 25615880 PMCID: PMC7126451 DOI: 10.1016/j.ejpb.2015.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 01/07/2015] [Accepted: 01/12/2015] [Indexed: 02/06/2023]
Abstract
Dealing with mucosal delivery systems means dealing with mucus. The name mucosa comes from mucus, a dense fluid enriched in glycoproteins, such as mucin, which main function is to protect the delicate mucosal epithelium. Mucus provides a barrier against physiological chemical and physical aggressors (i.e., host secreted digestive products such as bile acids and enzymes, food particles) but also against the potentially noxious microbiota and their products. Intestinal mucosa covers 400m(2) in the human host, and, as a consequence, is the major portal of entry of the majority of known pathogens. But, in turn, some microorganisms have evolved many different approaches to circumvent this barrier, a direct consequence of natural co-evolution. The understanding of these mechanisms (known as virulence factors) used to interact and/or disrupt mucosal barriers should instruct us to a rational design of nanoparticulate delivery systems intended for oral vaccination and immunotherapy. This review deals with this mimetic approach to obtain nanocarriers capable to reach the epithelial cells after oral delivery and, in parallel, induce strong and long-lasting immune and protective responses.
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Affiliation(s)
- Carlos Gamazo
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Nekane Martín-Arbella
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Ana Brotons
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Ana I Camacho
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - J M Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain.
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Abstract
INTRODUCTION Gene vaccines are an interesting and emerging alternative for the prevention of infectious diseases, as well as in the treatment of other pathologies including cancer, allergies, autoimmune diseases, or even drug dependencies. When applied to the target organism, these vaccines induce the expression of encoded antigens and elicit the corresponding immune response, with the potential ability of being able to induce antibody-, helper T cell-, and cytotoxic T cell-mediated immune responses. AREAS COVERED Special attention is paid to the variety of adjuvants that may be co-administered to enhance and/or to modulate immune responses, and to the methods of delivery. Finally, this article reviews the efficacy data of gene vaccines against infectious diseases released from current clinical trials. EXPERT OPINION Taken together, this approach will have a major impact on future strategies for the prevention of infectious diseases. Better-designed nucleic acid constructs, novel delivery technologies, as well as the clarification of the mechanisms for antigen presentation will improve the potential applications of this vaccination strategy against microbial pathogens.
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Affiliation(s)
- Małgorzata Anna Marć
- a 1 Jagiellonian University Medical College, Faculty of Pharmacy, Department of Pharmaceutical Biochemistry , Medyczna 9, PL 30-688 Cracow, Poland
| | - Enrique Domínguez-Álvarez
- b 2 Jagiellonian University Medical College, Faculty of Pharmacy, Department of Technology and Biotechnology of Drugs , Medyczna 9, PL 30-688 Cracow, Poland
| | - Carlos Gamazo
- c 3 University of Navarra, Institute of Tropical Health (ISTUN), Department of Microbiology and Parasitology , Irunlarrea 1, 31008 Pamplona, Spain
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Penalva R, Esparza I, Larraneta E, González-Navarro CJ, Gamazo C, Irache JM. Zein-Based Nanoparticles Improve the Oral Bioavailability of Resveratrol and Its Anti-inflammatory Effects in a Mouse Model of Endotoxic Shock. J Agric Food Chem 2015; 63:5603-5611. [PMID: 26027429 DOI: 10.1021/jf505694e] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Resveratrol offers pleiotropic health benefits including a reported ability to inhibit lipopolysaccharide (LPS)-induced cytokine production. The aim of this work was to prepare, characterize, and evaluate a resveratrol nanoparticulate formulation based on zein. For this purpose, the oral bioavailability of the encapsulated polyphenol as well as its anti-inflammatory effects in a mouse model of endotoxic shock was studied. The resveratrol-loaded nanoparticles displayed a mean size of 307 ± 3 nm, with a negative zeta potential (-51.1 ± 1.55 mV), and a polyphenol loading of 80.2 ± 3.26 μg/mg. In vitro, the release of resveratrol from the nanoparticles was found to be pH independent and adjusted well to the Peppas-Sahlin kinetic model, suggesting a mechanism based on the combination of diffusion and erosion of the nanoparticle matrix. Pharmacokinetic studies demonstrated that zein-based nanoparticles provided high and prolonged plasma levels of the polyphenol for at least 48 h. The oral bioavailability of resveratrol when administered in these nanoparticles increased up to 50% (19.2-fold higher than for the control solution of the polyphenol). Furthermore, nanoparticles administered daily for 7 days at 15 mg/kg were able to diminish the endotoxic symptoms induced in mice by the intraperitoneal administration of LPS (i.e., hypothermia, piloerection, and stillness). In addition, serum tumor necrosis factor-alpha (TNF-α) levels were slightly lower (approximately 15%) than those observed in the control.
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Affiliation(s)
- Rebeca Penalva
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
| | - Irene Esparza
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
| | - Eneko Larraneta
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
| | - Carlos J González-Navarro
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
| | - Carlos Gamazo
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
| | - Juan M Irache
- †Department of Pharmacy and Pharmaceutical Technology, ‡Department of Microbiology, and #Centre for Nutrition Research, University of Navarra, 31080 Pamplona, Spain
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Barón J, Mulero P, Pedraza MI, Gamazo C, de la Cruz C, Ruiz M, Ayuso M, Cebrián MC, García-Talavera P, Marco J, Guerrero AL. HaNDL syndrome: Correlation between focal deficits topography and EEG or SPECT abnormalities in a series of 5 new cases. Neurologia 2015; 31:305-10. [PMID: 25976938 DOI: 10.1016/j.nrl.2015.03.004] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 11/11/2014] [Accepted: 03/05/2015] [Indexed: 01/03/2023] Open
Abstract
INTRODUCTION Transient headache and neurological deficits with cerebrospinal fluid lymphocytosis (HaNDL) is characterised by migraine-like headache episodes accompanied by neurological deficits consisting of motor, sensory, or aphasic symptoms. Electroencephalogram (EEG) and single photon emission computed tomography (SPECT) may show focal abnormalities that correspond to the neurological deficits. We aim to evaluate the correlation between focal deficit topography and EEG or SPECT abnormalities in 5 new cases. PATIENTS We retrospectively reviewed patients attended in a tertiary hospital (January 2010-May 2014) and identified 5 patients (3 men, 2 women) with a mean age of 30.6 ± 7.7 (21-39) years. They presented 3.4 ± 2.6 episodes of headache (range, 2-8) of moderate to severe intensity and transient neurological deficits over a maximum of 5 weeks. Pleocytosis was detected in CSF in all cases (70 to 312 cells/mm3, 96.5-100% lymphocytes) with negative results from aetiological studies. RESULTS At least one EEG was performed in 4 patients and SPECT in 3 patients. Patient 1: 8 episodes; 4 left hemisphere, 3 right hemisphere, and 1 brainstem; 2 EEGs showing left temporal and bilateral temporal slowing; normal SPECT. Patient 2: 2 episodes, left hemisphere and right hemisphere; SPECT showed decreased left temporal blood flow. Patient 3: 3 left hemisphere deficits; EEG with bilateral frontal and temporal slowing. Patient 4: 2 episodes with right parieto-occipital topography and right frontal slowing in EEG. Patient 5: 2 episodes, right hemisphere and left hemisphere, EEG with right temporal slowing; normal SPECT. CONCLUSION The neurological deficits accompanying headache in HaNDL demonstrate marked clinical heterogeneity. SPECT abnormalities and most of all EEG abnormalities were not uncommon in our series and they did not always correlate to the topography of focal déficits.
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Affiliation(s)
- J Barón
- Servicio de Neurofisiología, Hospital Clínico Universitario de Valladolid
| | - P Mulero
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid
| | - M I Pedraza
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid
| | - C Gamazo
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid
| | - C de la Cruz
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid
| | - M Ruiz
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid
| | - M Ayuso
- Servicio de Neurofisiología, Hospital Clínico Universitario de Valladolid
| | - M C Cebrián
- Servicio de Neurofisiología, Hospital Clínico Universitario de Valladolid
| | - P García-Talavera
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid
| | - J Marco
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid
| | - A L Guerrero
- Servicio de Neurología, Hospital Clínico Universitario de Valladolid.
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García-Talavera P, Ruiz M, González-Selma M, Sainz-Esteban A, Cobo A, Villanueva J, Gamazo C, Olmos R. SPECT-CT finding of 99mTc-HMDP uptake in abdominal adenopathies in a patient with metastasic breast cancer. Rev Esp Med Nucl Imagen Mol 2015. [DOI: 10.1016/j.remnie.2015.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
A simple procedure for obtaining protective antigens from Gram-negative bacteria and their encapsulation into immunomodulatory nanoparticles is described. A heat treatment in saline solution of whole bacteria rendered the release of small membrane vesicles containing outer membrane components and also superficial appendages, such as fractions of fimbriae and flagella. The immunogenicity of these antigens may be improved after encapsulation into poly(anhydride) nanoparticles made from the copolymer of methyl vinyl ether and maleic anhydride (Gantrez AN(®)).
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Affiliation(s)
- Carlos Gamazo
- Department of Microbiology, University of Navarra, C/Irunlarrea no 1, 31008, Pamplona, Spain,
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García-Talavera P, Ruiz MA, González-Selma ML, Sainz-Esteban A, Cobo A, Villanueva JG, Gamazo C, Olmos R. SPECT-CT finding of (99m)Tc-HMDP uptake in abdominal adenopathies in a patient with metastasic breast cancer. Rev Esp Med Nucl Imagen Mol 2014; 34:203-4. [PMID: 25103143 DOI: 10.1016/j.remn.2014.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 07/01/2014] [Accepted: 07/02/2014] [Indexed: 11/29/2022]
Affiliation(s)
- P García-Talavera
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.
| | - M A Ruiz
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - M L González-Selma
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - A Sainz-Esteban
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - A Cobo
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - J G Villanueva
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - C Gamazo
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - R Olmos
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
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Abstract
Allergic diseases are one of the most prevalent diseases, reaching epidemic proportions in developed countries. An allergic reaction occurs after contact with an environmental protein, such as inhalants allergens (pollen, animal dander, house dust mites), or food proteins. This response is known as part of the type 2 immunity that is counterbalanced by Type 1 immunity and Tregs. Widely used allergen-specific immunotherapy (IT) is a long term treatment to induce such switch from Th2 to Th1 response. However, conventional IT requires multiple allergen injections over a long period of time and is not free of risk of producing allergic reactions. As a consequence, new safer and faster immunotherapeutic methods are required. This review deals with allergen IT using nanoparticles as allergen delivery system that will allow a different way of administration, reduce dose and diminish allergen exposure to IgE bound to mast cells or basophils.
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Affiliation(s)
- Carlos Gamazo
- University of Navarra Dept. Microbiology C/Irunlarrea, 1; 31080 - Pamplona, Spain
| | - Gabriel Gastaminza
- Department Allergy & Clinical Immunology, Clinica Universidad de Navarra Av. Pio XII 36, 31008 – Pamplona, Spain
| | - Marta Ferrer
- Department Allergy & Clinical Immunology, Clinica Universidad de Navarra Av. Pio XII 36, 31008 – Pamplona, Spain
| | - María L Sanz
- Department Allergy & Clinical Immunology, Clinica Universidad de Navarra Av. Pio XII 36, 31008 – Pamplona, Spain
| | - Juan M Irache
- University of Navarra Dept. Pharmacy & Pharmaceutical Technology C/Irunlarrea, 1; 31080 – Pamplona, Spain
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Imbuluzqueta E, Gamazo C, Lana H, Campanero MÁ, Salas D, Gil AG, Elizondo E, Ventosa N, Veciana J, Blanco-Prieto MJ. Hydrophobic gentamicin-loaded nanoparticles are effective against Brucella melitensis infection in mice. Antimicrob Agents Chemother 2013; 57:3326-33. [PMID: 23650167 PMCID: PMC3697350 DOI: 10.1128/aac.00378-13] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 04/27/2013] [Indexed: 12/17/2022] Open
Abstract
The clinical management of human brucellosis is still challenging and demands in vitro active antibiotics capable of targeting the pathogen-harboring intracellular compartments. A sustained release of the antibiotic at the site of infection would make it possible to reduce the number of required doses and thus the treatment-associated toxicity. In this study, a hydrophobically modified gentamicin, gentamicin-AOT [AOT is bis(2-ethylhexyl) sulfosuccinate sodium salt], was either microstructured or encapsulated in poly(lactic-co-glycolic acid) (PLGA) nanoparticles. The efficacy of the formulations developed was studied both in vitro and in vivo. Gentamicin formulations reduced Brucella infection in experimentally infected THP-1 monocytes (>2-log10 unit reduction) when using clinically relevant concentrations (18 mg/liter). Moreover, in vivo studies demonstrated that gentamicin-AOT-loaded nanoparticles efficiently targeted the drug both to the liver and the spleen and maintained an antibiotic therapeutic concentration for up to 4 days in both organs. This resulted in an improved efficacy of the antibiotic in experimentally infected mice. Thus, while 14 doses of free gentamicin did not alter the course of the infection, only 4 doses of gentamicin-AOT-loaded nanoparticles reduced the splenic infection by 3.23 logs and eliminated it from 50% of the infected mice with no evidence of adverse toxic effects. These results strongly suggest that PLGA nanoparticles containing chemically modified hydrophobic gentamicin may be a promising alternative for the treatment of human brucellosis.
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Affiliation(s)
- Edurne Imbuluzqueta
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Carlos Gamazo
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Hugo Lana
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | | | - David Salas
- Department of Nutritional Sciences, Physiology and Toxicology, University of Navarra, Pamplona, Spain
| | - Ana Gloria Gil
- Department of Nutritional Sciences, Physiology and Toxicology, University of Navarra, Pamplona, Spain
| | - Elisa Elizondo
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona, Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Bellaterra, Spain
| | - Nora Ventosa
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona, Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Bellaterra, Spain
| | - Jaume Veciana
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona, Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Bellaterra, Spain
| | - María J. Blanco-Prieto
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
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García-Talavera P, Olmos R, Sainz-Esteban A, Ruiz M, González M, Gamazo C. Evaluation by SPECT-CT of an incidental finding of a thymoma and breast cancer in a myocardial perfusion SPECT with 99mTc-MIBI. Rev Esp Med Nucl Imagen Mol 2013. [DOI: 10.1016/j.remnie.2013.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Camacho A, Irache J, de Souza J, Sánchez-Gómez S, Gamazo C. Nanoparticle-based vaccine for mucosal protection against Shigella flexneri in mice. Vaccine 2013; 31:3288-94. [DOI: 10.1016/j.vaccine.2013.05.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/01/2013] [Accepted: 05/08/2013] [Indexed: 10/26/2022]
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Abstract
The burden of dysentery due to shigellosis among children in the developing world is still a major concern. A safe and efficacious vaccine against this disease is a priority, since no licensed vaccine is available. This review provides an update of vaccine achievements focusing on subunit vaccine strategies and the forthcoming strategies surrounding this approach. In particular, this review explores several aspects of the pathogenesis of shigellosis and the elicited immune response as being the basis of vaccine requirements. The use of appropriate Shigella antigens, together with the right adjuvants, may offer safety, efficacy and more convenient delivery methods for massive worldwide vaccination campaigns.
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Camacho A, Souza-Rebouças J, Irache J, Gamazo C. Towards a non-living vaccine against Shigella flexneri: From the inactivation procedure to protection studies. Methods 2013; 60:264-8. [DOI: 10.1016/j.ymeth.2012.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 09/22/2012] [Indexed: 11/27/2022] Open
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41
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Sánchez-Martínez M, Da Costa Martins R, Quincoces G, Gamazo C, Caicedo C, Irache J, Peñuelas I. Radiolabeling and biodistribution studies of polymeric nanoparticles as adjuvants for ocular vaccination against brucellosis. Rev Esp Med Nucl Imagen Mol 2013. [DOI: 10.1016/j.remnie.2013.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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42
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García-Talavera P, González M, Aís G, Olmos R, Ruiz M, Sainz A, Gamazo C, Gómez A. Fe de errores a: Valor de la SPECT-TAC en la localización de un adenoma de paratiroides ectópico retrofaríngeo como causa de hiperparatiroidismo primario persistente. Rev Esp Med Nucl Imagen Mol 2013. [DOI: 10.1016/j.remn.2012.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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García-Talavera P, Olmos R, Sainz-Esteban A, Ruiz MÁ, González ML, Gamazo C. Evaluation by SPECT-CT of an incidental finding of a thymoma and breast cancer in a myocardial perfusion SPECT with 99mTc-MIBI. Rev Esp Med Nucl Imagen Mol 2012; 32:260-2. [PMID: 23267742 DOI: 10.1016/j.remn.2012.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 10/27/2012] [Accepted: 10/29/2012] [Indexed: 10/27/2022]
Abstract
We present a case of a 78-year-old female with effort angina. A myocardial perfusion SPECT (MPS) showed increased tracer uptake in two synchronic tumor lesions, a thymoma and a breast cancer. This case highlights the contribution of SPECT-CT in the characterization of these findings and its essential role in rapid decision-making. The patient underwent surgery of both lesions that had gone undetected prior to the conduction of the MPS.
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Affiliation(s)
- P García-Talavera
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.
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44
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García-Talavera P, González ML, Aís G, Olmos R, Ruiz MÁ, Sainz A, Gamazo C, Gómez A. SPECT-CT in the localization of an ectopic retropharyngeal parathyroid adenoma as a cause for persistent primary hyperparathyroidism. Rev Esp Med Nucl Imagen Mol 2012; 31:275-7. [PMID: 23067531 DOI: 10.1016/j.remn.2012.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 01/31/2012] [Accepted: 02/01/2012] [Indexed: 10/28/2022]
Abstract
A common cause for surgical failure of primary hyperparathyroidism (pHPT) is the non-detection of an ectopic adenoma during the intervention. We present a case of a patient with pHPT in whom an ectopic gland was found in the right retropharyngeal space by means of a double phase (99m)Tc-methoxy-isobutyl-isonitrile ((99m)Tc-MIBI) scintigraphy and early SPECT-CT after several surgeries and imaging tests. The addition of a tomography to the planar scintigraphy increases its sensitivity and improves pathological parathyroid glands localization. The hybrid imaging is sometimes essential to obtain surgical success, as in the case of ectopic adenomas.
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Affiliation(s)
- P García-Talavera
- Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.
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45
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Rebouças JDS, Irache JM, Camacho AI, Esparza I, del Pozo V, Sanz ML, Ferrer M, Gamazo C. Development of poly(anhydride) nanoparticles loaded with peanut proteins: The influence of preparation method on the immunogenic properties. Eur J Pharm Biopharm 2012; 82:241-9. [DOI: 10.1016/j.ejpb.2012.06.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/31/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
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46
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Da Costa Martins R, Gamazo C, Sánchez-Martínez M, Barberán M, Peñuelas I, Irache JM. Conjunctival vaccination against Brucella ovis in mice with mannosylated nanoparticles. J Control Release 2012; 162:553-60. [DOI: 10.1016/j.jconrel.2012.07.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/20/2012] [Accepted: 07/21/2012] [Indexed: 01/18/2023]
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47
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García-Talavera P, Ruiz M, Montes A, Gamazo C, González M, Olmos R. Nasoalveolar cyst as a cause of false positive result in post-therapy 131I whole body scintigraphy. Rev Esp Med Nucl Imagen Mol 2012. [DOI: 10.1016/j.remnie.2012.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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48
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García-Talavera P, González M, Aís G, Olmos R, Ruiz M, Sainz A, Gamazo C, Gómez A. SPECT-CT in the localization of an ectopic retropharyngeal parathyroid adenoma as a cause for persistent primary hyperparathyroidism. Rev Esp Med Nucl Imagen Mol 2012. [DOI: 10.1016/j.remnie.2012.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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49
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Abstract
Ovine brucellosis is a very contagious zoonotic disease distributed worldwide and constitutes a very important zoosanitary and economic problem. The control of the disease includes animal vaccination and slaughter of infected flocks. However, the commercially available vaccine in most countries is based on the attenuated strain Brucella melitensis Rev 1, which presents important safety drawbacks. This review is focused on the most recent and promising acellular vaccine proposals.
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Affiliation(s)
- Raquel Da Costa Martins
- Department of Pharmaceutics and Pharmaceutical Technology, University of Navarra, C/Irunlarrea, 1 31008-Pamplona, Spain
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50
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Imbuluzqueta E, Lemaire S, Gamazo C, Elizondo E, Ventosa N, Veciana J, Van Bambeke F, Blanco-Prieto MJ. Cellular pharmacokinetics and intracellular activity against Listeria monocytogenes and Staphylococcus aureus of chemically modified and nanoencapsulated gentamicin. J Antimicrob Chemother 2012; 67:2158-64. [DOI: 10.1093/jac/dks172] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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