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Dutschke A, Jensen MM, Nanque JP, Medina C, Sanha FC, Holm M, Wejse C, Jespersen S, Hønge BL. Clinical presentations and outcomes of HIV-1 and HIV-2 among infected children in Guinea-Bissau: a nationwide study. Public Health 2024; 230:38-44. [PMID: 38492260 DOI: 10.1016/j.puhe.2024.02.008] [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: 09/27/2023] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 03/18/2024]
Abstract
OBJECTIVES Disease progression, loss to follow-up, and mortality of HIV-2 compared with HIV-1 in children is not well understood. This is the first nationwide study reporting outcomes in children with the two HIV types in Guinea-Bissau. STUDY DESIGN Nationwide retrospective follow-up study. METHODS This is a retrospective follow-up study among HIV-infected children <15 years at nine ART centers from 2006 to 2021. Baseline parameters and disease outcomes for children with HIV-2 and HIV-1 were compared. RESULTS The annual number of children diagnosed with HIV peaked in 2017. HIV-2 (n = 64) and HIV-1 (n = 1945) infected children were different concerning baseline median age (6.5 vs 3.1 years, P < 0.01), but had similar levels of severe immunodeficiency (P = 0.58) and severe anemia (P = 0.26). Within the first year of follow-up, 36.3% were lost, 5.9% died, 2.7% had transferred clinic, and 55.2% remained for follow-up. Mortality (HR = 1.05 95% CI: 0.53-2.08 for HIV-2) and attrition (HR = 0.86 95% CI: 0.62-1.19 for HIV-2) rates were similar for HIV types. CONCLUSIONS The decline in children diagnosed per year since 2017 is possibly due to lower HIV prevalence, lack of HIV tests, and the SARS-CoV-2 epidemic. Children with HIV-2 were twice as old as HIV-1 infected when diagnosed, which suggests a slower disease progression. However, once they develop immunosuppression mortality is similar.
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Affiliation(s)
- A Dutschke
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau; Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark; GloHAU, Center for Global Health, School of Public Health, Aarhus University, Aarhus, Denmark.
| | - M M Jensen
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau; Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - J P Nanque
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau
| | - C Medina
- National HIV Programme, Ministry of Health, Guinea-Bissau
| | - F C Sanha
- Department of Pediatrics, Hospital Nacional Simão Mendes, Bissau, Guinea-Bissau
| | - M Holm
- Department of Paediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - C Wejse
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau; Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - S Jespersen
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau; Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - B L Hønge
- Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau; Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
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Acevedo-Rodriguez JG, Zamudio C, Kojima N, Krapp F, Tsukayama P, Sal Y Rosas Celi VG, Baldeon D, Neciosup-Vera CS, Medina C, Gonzalez-Lagos E, Castro L, Fowlkes A, Azziz-Baumgartner E, Gotuzzo E. Influenza incidence, lineages, and vaccine effectiveness estimates in Lima, Peru, 2023. Lancet Microbe 2024; 5:e308-e309. [PMID: 38219756 DOI: 10.1016/s2666-5247(23)00392-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 01/16/2024]
Affiliation(s)
| | - Carlos Zamudio
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Noah Kojima
- US Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Fiorella Krapp
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Pablo Tsukayama
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | | | - Dante Baldeon
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | | | - Carlos Medina
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Elsa Gonzalez-Lagos
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Laura Castro
- US Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ashley Fowlkes
- US Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Eduardo Gotuzzo
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 15102, Peru.
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Huenuvil-Pacheco I, Jaramillo A, Abreu N, Garrido-Miranda K, Sánchez-Sanhueza G, González-Rocha G, Medina C, Montoya L, Sanhueza J, Melendrez M. Biocidal effects of organometallic materials supported on ZSM-5 Zeolite: Influence of the physicochemical and surface properties. Heliyon 2024; 10:e27182. [PMID: 38455576 PMCID: PMC10918221 DOI: 10.1016/j.heliyon.2024.e27182] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/09/2024] Open
Abstract
Antifouling coatings containing biocidal agents can be used to prevent the accumulation of biotic deposits on submerged surfaces; however, several commercial biocides can negatively affect the ecosystem. In this study, various formulations of a potential biocide product comprising copper nanoparticles and capsaicin supported on zeolite ZSM-5 were analyzed to determine the influence of the concentration of each component. The incorporation of copper was evidenced by scanning electron microscopy and energy dispersive spectroscopy. Similarly, Fourier-transform infrared spectroscopy confirmed that capsaicin was supported on the zeolite surface. The presence of capsaicin on the external zeolite surface significantly reduced the surface area of the zeolite. Finally, bacterial growth inhibition analysis showed that copper nanoparticles inhibited the growth of strains Idiomarina loihiensis UCO25, Pseudoalteromonas sp. UCO92, and Halomonas boliviensis UCO24 while the organic component acted as a reinforcing biocide.
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Affiliation(s)
- I. Huenuvil-Pacheco
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, 01145 Francisco Salazar, Temuco 4780000, Chile
- Department of Chemical Engineering, University of Concepción, Concepción 4070386, Chile
| | - A.F. Jaramillo
- Department of Mechanical Engineering, Universidad de La Frontera, 01145 Francisco Salazar, Temuco 4780000, Chile
- Departamento de Ingeniería Mecánica, Universidad de Córdoba, Cr 6 #76-103, Montería 230002, Colombia
| | - N.J. Abreu
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, 01145 Francisco Salazar, Temuco 4780000, Chile
- Centro de Manejo de Residuos y Bioenergía, BIOREN, Universidad de La Frontera, 01145 Francisco Salazar, Temuco 4780000, Chile
| | - K. Garrido-Miranda
- Agriaquaculture Nutritional Genomic Center (CGNA), Temuco 4780000, Chile
- Núcleo de Investigación en Bioproductos y Materiales Avanzados (BIOMA), Universidad Católica de Temuco, Avenida Rudecindo Ortega 02950, Campus San Juan Pablo II, Temuco 4780000, Chile
| | - G. Sánchez-Sanhueza
- Department of Restorative Dentistry, Faculty of Dentistry, Universidad de Concepción, 1550 Roosevelt St, Concepcion 4030000, Chile
| | - G. González-Rocha
- Laboratorio de Investigación en Agentes Antibacterianos, Departamento de Microbiología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción 4030000, P.O. Box C-160, Chile
| | - C. Medina
- Department of Mechanical Engineering (DIM), Faculty of Engineering, University of Concepción, Edmundo Larenas 219, Concepcion 4070409, Chile
| | - L.F. Montoya
- Department of Chemical Engineering, University of Concepción, Concepción 4070386, Chile
| | - J.P. Sanhueza
- Department of Materials Engineering (DIMAT), Faculty of Engineering, Universidad de Concepción, 315 Edmundo Larenas, Concepcion, 4070415, Chile
| | - M.F. Melendrez
- Facultad de Ciencias para el Cuidado de la Salud, Universidad San Sebastían, Campus Las Tres Pascualas, Lientur 1457, Concepción, 4060000, Chile
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Tuninetti V, Forcael D, Valenzuela M, Martínez A, Ávila A, Medina C, Pincheira G, Salas A, Oñate A, Duchêne L. Assessing Feed-Forward Backpropagation Artificial Neural Networks for Strain-Rate-Sensitive Mechanical Modeling. Materials (Basel) 2024; 17:317. [PMID: 38255487 PMCID: PMC10821052 DOI: 10.3390/ma17020317] [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] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/21/2023] [Accepted: 11/01/2023] [Indexed: 01/24/2024]
Abstract
The manufacturing processes and design of metal and alloy products can be performed over a wide range of strain rates and temperatures. To design and optimize these processes using computational mechanics tools, the selection and calibration of the constitutive models is critical. In the case of hazardous and explosive impact loads, it is not always possible to test material properties. For this purpose, this paper assesses the efficiency and the accuracy of different architectures of ANNs for the identification of the Johnson-Cook material model parameters. The implemented computational tool of an ANN-based parameter identification strategy provides adequate results in a range of strain rates required for general manufacturing and product design applications. Four ANN architectures are studied to find the most suitable configuration for a reduced amount of experimental data, particularly for cases where high-impact testing is constrained. The different ANN structures are evaluated based on the model's predictive capability, revealing that the perceptron-based network of 66 inputs and one hidden layer of 30 neurons provides the highest prediction accuracy of the effective flow stress-strain behavior of Ti64 alloy and three virtual materials.
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Affiliation(s)
- Víctor Tuninetti
- Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, Chile; (D.F.); (A.M.)
| | - Diego Forcael
- Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, Chile; (D.F.); (A.M.)
| | - Marian Valenzuela
- Doctoral Program in Sciences of Natural Resources, Universidad de La Frontera, Temuco 4811230, Chile;
| | - Alex Martínez
- Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, Chile; (D.F.); (A.M.)
| | - Andrés Ávila
- Centro de Excelencia de Modelación y Computación Científica, Universidad de La Frontera, Temuco 4811322, Chile;
| | - Carlos Medina
- Department of Mechanical Engineering, Faculty of Engineering, University of Concepción, Concepción 4070138, Chile; (C.M.); (A.S.)
| | - Gonzalo Pincheira
- Department of Industrial Technologies, Faculty of Engineering, Universidad of Talca, Curicó 3340000, Chile;
| | - Alexis Salas
- Department of Mechanical Engineering, Faculty of Engineering, University of Concepción, Concepción 4070138, Chile; (C.M.); (A.S.)
| | - Angelo Oñate
- Department of Mechanical Engineering, Faculty of Engineering, Universidad del Bío-Bío, Concepción 4081112, Chile;
- Department of Materials Engineering (DIMAT), Faculty of Engineering, Universidad de Concepcion, Concepción 4070138, Chile
| | - Laurent Duchêne
- Department ArGEnCo-MSM, University of Liège, 4000 Liège, Belgium;
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Cutiño AM, Del Carmen Sánchez-Aguilar M, Ruiz-Sáinz JE, Del Rosario Espuny M, Ollero FJ, Medina C. A Novel System to Selective Tagging of Sinorhizobium fredii Symbiotic Plasmids. Methods Mol Biol 2024; 2751:247-259. [PMID: 38265722 DOI: 10.1007/978-1-0716-3617-6_17] [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: 01/25/2024]
Abstract
Conventional systems used to tag and transfer symbiotic plasmids (pSyms) of rhizobial strains are based in mutagenesis with transposons. In those processes, numerous clones must be analyzed to find one of them with the transposon inserted in the pSym. Following this strategy, the insertion might interrupt a gene that can affect the symbiotic phenotype of the bacteria tagged. Here, we have developed a new system based in homologous recombination that generates Sinorhizobium fredii strains with pSyms tagged by the insertion of a suicide vector which harbor a truncated copy of S. fredii HH103 nodZ gene, a mob site, and a kanamycin-resistant gene. When it is introduced by conjugation in a S. fredii strain, the vector integrates in pSym by only one recombination event. This pSym tagged can be transferred in matting experiments to other strains in the presence of a helper plasmid. Following this method, we have tagged several strains and transferred their pSyms to a recipient strain demonstrating the potential of this new system.
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Affiliation(s)
- Ana María Cutiño
- Department of Microbiology, University of Seville, Seville, Spain
| | | | | | | | | | - Carlos Medina
- Department of Microbiology, University of Seville, Seville, Spain.
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6
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Jiménez-Guerrero I, López-Baena FJ, Medina C. Microscope Subcellular Localization of Plant-Interacting Bacterial Effectors in Animal Cell Cultures. Methods Mol Biol 2024; 2751:165-178. [PMID: 38265716 DOI: 10.1007/978-1-0716-3617-6_11] [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: 01/25/2024]
Abstract
Eukaryote-interacting bacteria have developed along the evolution of an arsenal of tools to interact with potential hosts and to evade their defensive responses. Among these tools, the effector proteins are gaining a special importance due to the high diversity of molecular actions that they play in the host cell, with the final aim of taking the control over the cell. Bacteria inject these effectors into the cytosol of the host cells through distinct ways, as the type III secretion system. The study of the effectors' molecular roles inside the host cell is challenging, due in part to the lack of traceability of such proteins once they are delivered by the bacteria. Here, we describe in depth a methodology that combines the increase of the bacterial effector concentration by protein expression systems with the use of heterologous hosts to facilitate the visualization of the subcellular targeting of the effector inside the host cell by fluorescence microscopy.
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Affiliation(s)
| | | | - Carlos Medina
- Department of Microbiology, University of Seville, Seville, Spain.
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Jadhav SG, Setten RL, Medina C, Cui XS, Dowdy SF. Design, Synthesis, and Biochemical Analysis of a Molecule Designed to Enhance Endosomal Escape. AAPS J 2023; 26:10. [PMID: 38133698 DOI: 10.1208/s12248-023-00876-5] [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: 08/28/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
RNA therapeutics, including siRNAs, ASOs, and PMOs, have great potential to treat human disease. However, RNA therapeutics are too large, too charged, and/or too hydrophilic to cross the cellular membrane and are instead taken up into cells by endocytosis. Unfortunately, the vast majority of RNA therapeutics remain trapped inside endosomes (≥ 99%), which is the sole reason preventing their use to treat cancer, COVID, and other diseases. In contrast, enveloped viruses, such as influenza, also have an endosomal escape problem, but have evolved a highly efficient endosomal escape mechanism using trimeric hemagglutinin (HA) fusogenic protein. HA contains an outer hydrophilic domain (HA1) that masks an inner hydrophobic fusogenic/endosomal escape domain (HA2). Once inside endosomes, HA1 is shed to expose HA2 that, due to hydrophobicity, buries itself into the endosomal lipid bilayer, driving escape into the cytoplasm in a non-toxic fashion. To begin to address the RNA therapeutics rate-limiting endosomal escape problem, we report here a first step in the design and synthesis of a universal endosomal escape domain (uEED) that biomimics the enveloped virus escape mechanism. uEED contains an outer hydrophilic mask covalently attached to an inner hydrophobic escape domain. In plasma, uEED is inert and highly metabolically stable; however, when placed in endo/lysosomal conditions, uEED is activated by enzymatic removal of the hydrophilic mask, followed by self-immolation of the linker resulting in exposure of the hydrophobic indole ring domain in the absence of any hydrophilic tags. Thus, uEED is a synthetic biomimetic of the highly efficient viral endosomal escape mechanism.
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Affiliation(s)
- Satish G Jadhav
- Department of Cellular & Molecular Medicine, UCSD School of Medicine, 9500 Gilman Dr, MC0686, La Jolla, California, 92093-0686, USA
- Ionis Pharmaceuticals, Carlsbad, California, 92008, USA
| | - Ryan L Setten
- Department of Cellular & Molecular Medicine, UCSD School of Medicine, 9500 Gilman Dr, MC0686, La Jolla, California, 92093-0686, USA
- , San Diego, California, USA
| | - Carlos Medina
- Department of Cellular & Molecular Medicine, UCSD School of Medicine, 9500 Gilman Dr, MC0686, La Jolla, California, 92093-0686, USA
- Genedit, South San Francisco, California, USA
| | - Xian-Shu Cui
- Department of Cellular & Molecular Medicine, UCSD School of Medicine, 9500 Gilman Dr, MC0686, La Jolla, California, 92093-0686, USA
| | - Steven F Dowdy
- Department of Cellular & Molecular Medicine, UCSD School of Medicine, 9500 Gilman Dr, MC0686, La Jolla, California, 92093-0686, USA.
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Navarro-Gómez P, Fuentes-Romero F, Pérez-Montaño F, Jiménez-Guerrero I, Alías-Villegas C, Ayala-García P, Almozara A, Medina C, Ollero FJ, Rodríguez-Carvajal MÁ, Ruiz-Sainz JE, López-Baena FJ, Vinardell JM, Acosta-Jurado S. A complex regulatory network governs the expression of symbiotic genes in Sinorhizobium fredii HH103. Front Plant Sci 2023; 14:1322435. [PMID: 38186594 PMCID: PMC10771577 DOI: 10.3389/fpls.2023.1322435] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/04/2023] [Indexed: 01/09/2024]
Abstract
Introduction The establishment of the rhizobium-legume nitrogen-fixing symbiosis relies on the interchange of molecular signals between the two symbionts. We have previously studied by RNA-seq the effect of the symbiotic regulators NodD1, SyrM, and TtsI on the expression of the symbiotic genes (the nod regulon) of Sinorhizobium fredii HH103 upon treatment with the isoflavone genistein. In this work we have further investigated this regulatory network by incorporating new RNA-seq data of HH103 mutants in two other regulatory genes, nodD2 and nolR. Both genes code for global regulators with a predominant repressor effect on the nod regulon, although NodD2 acts as an activator of a small number of HH103 symbiotic genes. Methods By combining RNA-seq data, qPCR experiments, and b-galactosidase assays of HH103 mutants harbouring a lacZ gene inserted into a regulatory gene, we have analysed the regulatory relations between the nodD1, nodD2, nolR, syrM, and ttsI genes, confirming previous data and discovering previously unknown relations. Results and discussion Previously we showed that HH103 mutants in the nodD2, nolR, syrM, or ttsI genes gain effective nodulation with Lotus japonicus, a model legume, although with different symbiotic performances. Here we show that the combinations of mutations in these genes led, in most cases, to a decrease in symbiotic effectiveness, although all of them retained the ability to induce the formation of nitrogen-fixing nodules. In fact, the nodD2, nolR, and syrM single and double mutants share a set of Nod factors, either overproduced by them or not generated by the wild-type strain, that might be responsible for gaining effective nodulation with L. japonicus.
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Affiliation(s)
- Pilar Navarro-Gómez
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
- Departamento de Biología Molecular e Ingeniería Bioquímica, Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide/Consejo Superior de Investigaciones Científicas/Junta de Andalucía, Sevilla, Spain
| | | | | | | | - Cynthia Alías-Villegas
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
- Departamento de Biología Molecular e Ingeniería Bioquímica, Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide/Consejo Superior de Investigaciones Científicas/Junta de Andalucía, Sevilla, Spain
| | | | - Andrés Almozara
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
| | - Carlos Medina
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
| | | | | | | | | | | | - Sebastián Acosta-Jurado
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
- Departamento de Biología Molecular e Ingeniería Bioquímica, Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide/Consejo Superior de Investigaciones Científicas/Junta de Andalucía, Sevilla, Spain
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Martinez LE, Gilardoni C, Medina C, Cremonte F, Etchegoin JA. The elucidation of the life cycle of Saccocoelioides nanii Szidat, 1954 (Digenea: Haploporidae) using molecular techniques. J Helminthol 2023; 97:e80. [PMID: 37919931 DOI: 10.1017/s0022149x23000597] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
In South America, the knowledge of trematode diversity parasitizing freshwater fishes is still scarce, as less than 5% of the freshwater fish fauna has been examined for parasites. A similar situation applies to studies on digenean life cycles, which have become increasingly rare. Among the digenean families parasitizing freshwater fishes in the region, Haploporidae is considered the richest in species diversity. However, information about the developmental stages of haploporid life cycles remains fragmentary. Particularly, in Argentina, nine cercariae attributed to the family Haploporidae have been described using morphological analysis, and only two life cycles of this family have been completely elucidated. In this study a new type of cercaria, morphologically assigned to the family Haploporidae and collected from the snail Heleobia parchappii (Cochliopidae) in Los Padres shallow lake, Buenos Aires province, was identified using morphological and molecular techniques. The molecular analysis, based on 28S and ITS2 sequences, revealed that the cercariae were 100% identical to adult specimens of Saccocoelioides nanii (Haploporidae) parasitizing the fish Prochilodus lineatus (Prochilodontidae) from Los Talas, Buenos Aires province. Our results not only provide information about the life cycle of S.nanii but also show that a molecular and morphological approach can be extremely useful in identifying the developmental stages of digeneans and elucidating their life cycles.
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Affiliation(s)
- L E Martinez
- Instituto de Investigaciones en Producción Sanidad y Ambiente (IIPROSAM), CONICET-Universidad Nacional de Mar del Plata, Centro de Asociación Simple CIC-PBA, Juan B. Justo 2550 (7600), Mar del Plata, Buenos Aires, Argentina
| | - C Gilardoni
- Instituto de Biología de Organismos Marinos (IBIOMAR-CONICET), Boulevard Brown 2915, (9120), Puerto Madryn, Chubut, Argentina
| | - C Medina
- Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Boulevard Brown 2915, (9120), Puerto Madryn, Chubut, Argentina
| | - F Cremonte
- Instituto de Biología de Organismos Marinos (IBIOMAR-CONICET), Boulevard Brown 2915, (9120), Puerto Madryn, Chubut, Argentina
| | - J A Etchegoin
- Instituto de Investigaciones en Producción Sanidad y Ambiente (IIPROSAM), CONICET-Universidad Nacional de Mar del Plata, Centro de Asociación Simple CIC-PBA, Juan B. Justo 2550 (7600), Mar del Plata, Buenos Aires, Argentina
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Barzallo D, Lazo R, Medina C, Guashpa C, Tacuri C, Palmay P. Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere. Polymers (Basel) 2023; 15:3329. [PMID: 37631387 PMCID: PMC10459782 DOI: 10.3390/polym15163329] [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: 06/11/2023] [Revised: 07/13/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Currently, catalytic pyrolysis has become a versatile and highly useful technology in the treatment of different plastic wastes. Thus, the development of selective catalysts to carry out cracking reactions and obtain a greater fraction of the desired products is essential. This study focuses on the synthesis of monometallic (Ni) and bimetallic (Ni-Zn) catalysts supported on ZSM-5 zeolite using an impregnation and co-impregnation method, respectively. The obtained catalysts were characterized by FTIR spectroscopy, N2 adsorption/desorption measurements, scanning electron microscopy (SEM) and energy dispersive X-Ray spectroscopy (EDS), temperature programmed NH3 desorption (TPD-NH3) and thermogravimetric analysis (TGA). In this way, a mixture of polystyrene and polypropylene recycled with a catalyst/plastic waste ratio of 1:500 was used for pyrolysis tests. The best results were obtained using the Ni-Zn/ZSM-5 catalyst, which included better impregnation, increased surface acidity, decreased dispersion and a shorter reaction time in the catalytic pyrolysis process. Under the optimized conditions, catalytic pyrolysis showed an excellent performance to generate hydrocarbons of greater industrial interest.
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Affiliation(s)
- Diego Barzallo
- Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador;
- Department of Chemistry, University of Balearic Islands, Cra. Valldemossa 7.5 km, 07122 Palma de Mallorca, Spain
| | - Rafael Lazo
- Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador;
| | - Carlos Medina
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Carlos Guashpa
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Carla Tacuri
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Paúl Palmay
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
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Romero LM, Araya N, Palacio DA, Sánchez-Sanhueza GA, Pérez EG, Solís FJ, Meléndrez MF, Medina C. Study of the Antibacterial Capacity of a Biomaterial of Zeolites Saturated with Copper Ions (Cu 2+) and Supported with Copper Oxide (CuO) Nanoparticles. Nanomaterials (Basel) 2023; 13:2140. [PMID: 37513151 PMCID: PMC10384100 DOI: 10.3390/nano13142140] [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] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023]
Abstract
In this work, copper (II) ions were saturated and copper oxide nanoparticles (CuO NPs) were supported in natural zeolite from Chile; this was achieved by making the adsorbent material come into contact with a copper ion precursor solution and using mechanical agitation, respectively. The kinetic and physicochemical process of the adsorption of copper ions in the zeolite was studied, as well as the effect of the addition of CuO NPs on the antibacterial properties. The results showed that the saturation of copper (II) ions in the zeolite is an efficient process, obtaining a 27 g L-1 concentration of copper ions in a time of 30 min. The TEM images showed that a good dispersion of the CuO NPs was obtained via mechanical stirring. The material effectively inhibited the growth of Gram-negative and Gram-positive bacteria that have shown resistance to methicillin and carbapenem. Furthermore, the zeolite saturated with copper at the same concentration had a better bactericidal effect than the zeolite supported with CuO NPs. The results suggested that the ease of processing and low cost of copper (II) ion-saturated zeolitic material could potentially be used for dental biomedical applications, either directly or as a bactericidal additive for 3D printing filaments.
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Affiliation(s)
- Lina M Romero
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, Universidad de Concepción, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile
| | - Nicolas Araya
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, Universidad de Concepción, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile
| | - Daniel A Palacio
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, 129 Edmundo Larenas, Concepcion 4070409, Chile
| | - Gabriela A Sánchez-Sanhueza
- Department of Restorative Dentistry, Faculty of Dentistry, Universidad de Concepción, Concepcion 4070409, Chile
| | - Eduardo G Pérez
- Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, San Nicolas de los Garza, Nuevo Leon 66451, Mexico
| | - Francisco J Solís
- Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, San Nicolas de los Garza, Nuevo Leon 66451, Mexico
| | - Manuel F Meléndrez
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, Universidad de Concepción, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile
- Unidad de Desarrollo Tecnológico, 2634 Av. Cordillera, Parque Industrial Coronel, Box 4051, Concepcion 4191996, Chile
| | - Carlos Medina
- Department of Mechanical Engineering (DIM), Faculty of Engineering, Universidad de Concepción, Edmundo Larenas 270, Concepcion 4070409, Chile
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Ben Ltaief L, Sishodia K, Mandal S, De S, Krishnan SR, Medina C, Pal N, Richter R, Fennel T, Mudrich M. Efficient Indirect Interatomic Coulombic Decay Induced by Photoelectron Impact Excitation in Large Pure Helium Nanodroplets. Phys Rev Lett 2023; 131:023001. [PMID: 37505945 DOI: 10.1103/physrevlett.131.023001] [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] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 06/05/2023] [Indexed: 07/30/2023]
Abstract
Ionization of matter by energetic radiation generally causes complex secondary reactions that are hard to decipher. Using large helium nanodroplets irradiated by extreme ultraviolet (XUV) photons, we show that the full chain of processes ensuing primary photoionization can be tracked in detail by means of high-resolution electron spectroscopy. We find that elastic and inelastic scattering of photoelectrons efficiently induces interatomic Coulombic decay (ICD) in the droplets. This type of indirect ICD even becomes the dominant process of electron emission in nearly the entire XUV range in large droplets with radius ≳40 nm. Indirect ICD processes induced by electron scattering likely play an important role in other condensed-phase systems exposed to ionizing radiation as well, including biological matter.
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Affiliation(s)
- L Ben Ltaief
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - K Sishodia
- Quantum Center of Excellence for Diamond and Emergent Materials and Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - S Mandal
- Indian Institute of Science Education and Research, Pune 411008, India
| | - S De
- Quantum Center of Excellence for Diamond and Emergent Materials and Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - S R Krishnan
- Quantum Center of Excellence for Diamond and Emergent Materials and Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - C Medina
- Institute of Physics, University of Freiburg, 79104 Freiburg, Germany
| | - N Pal
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - R Richter
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - T Fennel
- Institute for Physics, University of Rostock, 18051 Rostock, Germany
| | - M Mudrich
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
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13
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Jiménez-Guerrero I, López-Baena FJ, Medina C. Multitask Approach to Localize Rhizobial Type Three Secretion System Effector Proteins Inside Eukaryotic Cells. Plants (Basel) 2023; 12:plants12112133. [PMID: 37299112 DOI: 10.3390/plants12112133] [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] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/25/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023]
Abstract
Rhizobia can establish mutually beneficial interactions with legume plants by colonizing their roots to induce the formation of a specialized structure known as a nodule, inside of which the bacteria are able to fix atmospheric nitrogen. It is well established that the compatibility of such interactions is mainly determined by the bacterial recognition of flavonoids secreted by the plants, which in response to these flavonoids trigger the synthesis of the bacterial Nod factors that drive the nodulation process. Additionally, other bacterial signals are involved in the recognition and the efficiency of this interaction, such as extracellular polysaccharides or some secreted proteins. Some rhizobial strains inject proteins through the type III secretion system to the cytosol of legume root cells during the nodulation process. Such proteins, called type III-secreted effectors (T3E), exert their function in the host cell and are involved, among other tasks, in the attenuation of host defense responses to facilitate the infection, contributing to the specificity of the process. One of the main challenges of studying rhizobial T3E is the inherent difficulty in localizing them in vivo in the different subcellular compartments within their host cells, since in addition to their low concentration under physiological conditions, it is not always known when or where they are being produced and secreted. In this paper, we use a well-known rhizobial T3E, named NopL, to illustrate by a multitask approach where it localizes in heterologous hosts models, such as tobacco plant leaf cells, and also for the first time in transfected and/or Salmonella-infected animal cells. The consistency of our results serves as an example to study the location inside eukaryotic cells of effectors in distinct hosts with different handling techniques that can be used in almost every research laboratory.
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Affiliation(s)
- Irene Jiménez-Guerrero
- Departamento de Microbiología, Universidad de Sevilla, Avenida de Reina Mercedes, 6, 41012 Sevilla, Spain
| | | | - Carlos Medina
- Departamento de Microbiología, Universidad de Sevilla, Avenida de Reina Mercedes, 6, 41012 Sevilla, Spain
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Palmay P, Pillajo L, Andrade M, Medina C, Barzallo D. Kinetic Analysis of Thermal Degradation of Recycled Polypropylene and Polystyrene Mixtures Using Regenerated Catalyst from Fluidized Catalytic Cracking Process (FCC). Polymers (Basel) 2023; 15:polym15092035. [PMID: 37177182 PMCID: PMC10180723 DOI: 10.3390/polym15092035] [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: 03/27/2023] [Revised: 04/16/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
The pyrolysis process is a thermochemical recycling process that in recent years has gained importance due to its application in plastic waste, which is one of the biggest environmental problems today. Thus, it is essential to carry out kinetic and thermodynamic analyses to understand the thermocatalytic degradation processes involved in plastic waste mixtures. In this sense, the main objective of this study is to analyze the degradation kinetics of the specific mixture of polypropylene (25%) and polystyrene (75%) with 10% mass of regenerated FCC catalyst which was recovered from conventional refining processes using 3 heating rates at 5, 10 and 15 K min-1 by thermogravimetric analysis (TGA). The obtained TGA data were compared with the isoconversional models used in this work that include Friedman (FR), Kissinger Akahira Sunose (KAS), Flynn-Wall-Ozawa (FWO), Starink (ST) and Miura-Maki (MM) in order to determine the one that best fits the experimental data and to analyze the activation energy and the pre-exponential factor; the model is optimized by means of the difference of minimum squares. Activation energy values between 148 and 308 kJ/mol were obtained where the catalytic action has been notorious, decreasing the activation energy values with respect to thermal processes.
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Affiliation(s)
- Paul Palmay
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador
| | - Leslie Pillajo
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador
| | - Mónica Andrade
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador
| | - Carlos Medina
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador
| | - Diego Barzallo
- Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador
- Environmental Analytical Chemistry Group, University of Balearic Islands, Cra. Valldemossa 7.5 Km, 07122 Palma de Mallorca, Spain
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Salas A, Berrio ME, Martel S, Díaz-Gómez A, Palacio DA, Tuninetti V, Medina C, Meléndrez MF. Towards recycling of waste carbon fiber: Strength, morphology and structural features of recovered carbon fibers. Waste Manag 2023; 165:59-69. [PMID: 37086657 DOI: 10.1016/j.wasman.2023.04.017] [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] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/29/2023] [Accepted: 04/09/2023] [Indexed: 05/03/2023]
Abstract
Carbon fiber is one of the most widely used materials in high demand applications due to its high specific properties, however, its post-recycling properties limit its use to low performance applications. In this research, the carbon fiber recovering is examined using two methods: two-step pyrolysis and microwave-assisted thermolysis. The results indicate that the fibers recovered by pyrolysis show reduced surface and structural damage, maintaining the original mechanical properties of the fiber with losses below 5%. The fibers recovered by microwaves undergo significant surface changes that reduce their tensile strength by up to 60% and changes in their graphitic structure, increasing their degree of crystallinity by Raman index ID/IG from 1.98 to 2.86 and their amorphous degree by ID"/IG ratio from 0.411 to 1.599. Recovering fibers from microwave technique is 70% faster compared to two step pyrolysis, and provides recycled fibers with superior surface activation with the presence of polar functional groups -OH, -CO, and -CH that react with the epoxy matrix. The thermal, morphological, structural and mechanical characterizations of the recovered fibers detailed in this work provide valuable findings to evaluate their direct reuse in new composite materials.
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Affiliation(s)
- A Salas
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile; Department of Mechanical Engineering (DIM), Faculty of Engineering, University of Concepción, 219 Edmundo Larenas, Concepcion 4070409, Chile
| | - M E Berrio
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile
| | - S Martel
- Department of Mechanical Engineering (DIM), Faculty of Engineering, University of Concepción, 219 Edmundo Larenas, Concepcion 4070409, Chile
| | - A Díaz-Gómez
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile
| | - Daniel A Palacio
- Department of Polymers, Faculty of Chemistry, University of Concepción, Concepción, Chile
| | - V Tuninetti
- Department of Mechanical Engineering, Universidad de La Frontera, Francisco Salazar 01145, Temuco 4780000, Chile.
| | - C Medina
- Department of Mechanical Engineering (DIM), Faculty of Engineering, University of Concepción, 219 Edmundo Larenas, Concepcion 4070409, Chile
| | - M F Meléndrez
- Interdisciplinary Group of Applied Nanotechnology (GINA), Hybrid Materials Laboratory (HML), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion 4070409, Chile.
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Glucksman E, Medina C, Phillips J, Schlussel R, Glucksman S. New onset urinary incontinence in a pediatric patient with transverse myelitis. Urol Case Rep 2023; 46:102322. [PMID: 36687744 PMCID: PMC9852600 DOI: 10.1016/j.eucr.2023.102322] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/03/2023] [Accepted: 01/10/2023] [Indexed: 01/13/2023] Open
Abstract
Transverse myelitis is an inflammatory disorder of the spinal cord that can present with a wide array of lower urinary tract symptoms including urinary retention, frequency, urgency, and urge incontinence. We report a case of a 15 year old male with new onset urinary incontinence who initially presented to the urologist and was subsequently diagnosed with transverse myelitis.
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Affiliation(s)
- Eitan Glucksman
- Department of Urology, Westchester Medical Center, Valhalla, NY, USA,Corresponding author. Department of Urology, Westchester Medical Center, 19 Skyline Drive 1S-B45a Valhalla, NY, 10595, USA.
| | - Carlos Medina
- Department of Urology, Westchester Medical Center, Valhalla, NY, USA
| | - John Phillips
- Department of Urology, Westchester Medical Center, Valhalla, NY, USA
| | - Richard Schlussel
- Department of Urology, Westchester Medical Center, Valhalla, NY, USA
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Fahmy UA, Ahmed OAA, Badr-Eldin SM, Aldawsari HM, Okbazghi SZ, Awan ZA, Bakhrebah MA, Alomary MN, Abdulaal WH, Medina C, Alhakamy NA. Optimized Nanostructured Lipid Carriers Integrated into in situ Nasal Gel for Enhancing Brain Delivery of Flibanserin [Retraction]. Int J Nanomedicine 2023; 18:2253-2254. [PMID: 37143899 PMCID: PMC10153520 DOI: 10.2147/ijn.s419019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023] Open
Abstract
[This retracts the article DOI: 10.2147/IJN.S258791.].
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Laseca N, Morales R, Molina A, Anaya G, Medina C, Demyda-Peyrás S. 163 Genome-wide association study to identify candidate genomic regions for cow fertility in Retinta cattle breed. Reprod Fertil Dev 2022. [DOI: 10.1071/rdv35n2ab163] [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: 12/12/2022] Open
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Jiménez-Guerrero I, Medina C, Vinardell JM, Ollero FJ, López-Baena FJ. The Rhizobial Type 3 Secretion System: The Dr. Jekyll and Mr. Hyde in the Rhizobium–Legume Symbiosis. Int J Mol Sci 2022; 23:ijms231911089. [PMID: 36232385 PMCID: PMC9569860 DOI: 10.3390/ijms231911089] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/08/2022] [Accepted: 09/14/2022] [Indexed: 01/14/2023] Open
Abstract
Rhizobia are soil bacteria that can establish a symbiotic association with legumes. As a result, plant nodules are formed on the roots of the host plants where rhizobia differentiate to bacteroids capable of fixing atmospheric nitrogen into ammonia. This ammonia is transferred to the plant in exchange of a carbon source and an appropriate environment for bacterial survival. This process is subjected to a tight regulation with several checkpoints to allow the progression of the infection or its restriction. The type 3 secretion system (T3SS) is a secretory system that injects proteins, called effectors (T3E), directly into the cytoplasm of the host cell, altering host pathways or suppressing host defense responses. This secretion system is not present in all rhizobia but its role in symbiosis is crucial for some symbiotic associations, showing two possible faces as Dr. Jekyll and Mr. Hyde: it can be completely necessary for the formation of nodules, or it can block nodulation in different legume species/cultivars. In this review, we compile all the information currently available about the effects of different rhizobial effectors on plant symbiotic phenotypes. These phenotypes are diverse and highlight the importance of the T3SS in certain rhizobium–legume symbioses.
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Medina C, Krawczyk MC, Millan J, Blake MG, Boccia MM. Oxytocin-Cholinergic Central Interaction: Implications for Non-Social Memory Formation. Neuroscience 2022; 497:73-85. [PMID: 35752429 DOI: 10.1016/j.neuroscience.2022.06.028] [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: 01/17/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 10/17/2022]
Abstract
Oxytocin (OT) and vasopressin (AVP) are two closely related neuropeptides implicated in learning and memory processes, anxiety, nociception, addiction, feeding behavior and social information processing. Regarding learning and memory, OT has induced long-lasting impairment in different behaviors, while the opposite was observed with AVP. We have previously evaluated the effect of peripheral administration of OT or its antagonist (AOT) on the inhibitory avoidance response of mice and on the modulation of cholinergic mechanisms. Here, we replicate and validate those results, but this time through central administration of neuropeptides, considering their poor passage through the blood-brain barrier (BBB). When we delivered OT (0.10 ng/mouse) and its antagonist (0.10 ng/mouse) through intracerebroventricular (ICV) injections, the neuropeptide impaired and AOT enhanced the behavioral performance on an inhibitory avoidance response evaluated 48 h after training in a dose-dependent manner. On top of that, we investigated a possible central interaction between OT and the cholinergic system. Administration of anticholinesterases inhibitors with access to the central nervous system (CNS), the activation of muscarinic acetylcholine (Ach) receptors and the increase of evoked ACh release using linopirdine (Lino) (3-10 µg/kg, IP), reversed the impairment of retention performance induced by OT. Besides, either muscarinic or nicotinic antagonists with unrestricted access to the CNS reduced the magnitude of the performance-facilitating effect of AOT's central infusion. We suggest that OT might induce a cholinergic hypofunction state, resulting in an impairment of IA memory formation, a process for which the cholinergic system is crucially necessary.
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Affiliation(s)
- C Medina
- Laboratorio de Neurofarmacología de los Procesos de Memoria, Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
| | - M C Krawczyk
- Laboratorio de Neurofarmacología de los Procesos de Memoria, Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
| | - J Millan
- Laboratorio de Neurofarmacología de los Procesos de Memoria, Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
| | - M G Blake
- Instituto de Fisiología y Biofísica (IFIBIO UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
| | - M M Boccia
- Laboratorio de Neurofarmacología de los Procesos de Memoria, Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.
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Pandher M, Song A, Mahajan J, Srinivasan N, Berg C, Fernandez G, Chang C, Medina C, Alwaal A, Weiss R. Characterization of Pediatric Genital Injuries Due to Consumer Products from 2011 to 2020. Urology 2022; 167:201-206. [DOI: 10.1016/j.urology.2022.05.007] [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] [Received: 03/03/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 10/18/2022]
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Wagner K, Pingle SR, Walker K, Floridia E, Medina C, Rowe CK. Harnessing the epic electronic medical record to track indwelling ureteral stents in a pediatric population. J Pediatr Urol 2022; 18:23.e1-23.e5. [PMID: 34750074 DOI: 10.1016/j.jpurol.2021.10.007] [Citation(s) in RCA: 2] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/22/2021] [Accepted: 10/11/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Retention of indwelling ureteral stents due to loss to follow-up can result in significant harm to patients, often requiring multiple trips to the operating room. Despite widespread use of electronic medical records, there are few standardized options for urologists to track ureteral stents and no data on the rate of retained stents in a pediatric population. OBJECTIVE This pilot quality improvement project aims to: 1) develop a simple process to track indwelling ureteral stents using the Epic electronic medical record and 2) determine the incidence of forgotten stents in a pediatric population. METHODS We identified that operating room staff scan a barcode for ureteral stents at the time of surgery to log the stent as "Implanted" in the patient's medical record. The stent can later be marked as "Explanted" at the time of removal. A report was designed within Epic to identify all patients with a ureteral stent implanted from April 2014 to June 2019 at our hospital. We reviewed the records of patients whose stents had never been marked as "Explanted" to determine if any had a retained stent. A workflow was then designed to ensure staff would mark stents as "Explanted" at the time of removal and to periodically run the report within Epic to ensure that all patients with ureteral stents in place have appropriate follow-up. RESULTS Our report identified 152 ureteral stents with a status of "Implanted". 3 patients did not have evidence of stent removal documented in their medical record. Follow up with these patients revealed stent removal at an outside location. DISCUSSION Current approaches to stent tracking are laborious with limitations to adherence. The Epic software directly incorporates stent tracking into the individual patient chart allowing for easy implementation and follow up. Our study revealed no retained stents in our pediatric population. CONCLUSIONS All patients with ureteral stents placed at a single institution over a 5-year period were easily identified using an automated Epic report. Through this report, we will prevent morbidity associated with stent retention. This technique could easily be implemented at other hospital systems that use Epic, and similar reporting tools could be designed within other electronic medical record systems. The incidence of ureteral stent retention in the pediatric population is likely significantly lower than for their adult counterparts.
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Affiliation(s)
- Kathryn Wagner
- Department of Urology, University of Connecticut School of Medicine, 200 Academic Way, Farmington, CT, 06032, USA
| | - Srinath-Reddi Pingle
- Department of Urology, University of Connecticut School of Medicine, 200 Academic Way, Farmington, CT, 06032, USA
| | - Kathryn Walker
- Ambulatory Care Systems, Connecticut Children's, 282 Washington Street, Hartford, CT, 06106, USA
| | - Erin Floridia
- Division of Pediatric Urology, Connecticut Children's, 282 Washington Street, Hartford, CT, 06106, USA
| | - Carlos Medina
- Division of Pediatric Urology, Connecticut Children's, 282 Washington Street, Hartford, CT, 06106, USA
| | - Courtney K Rowe
- Division of Pediatric Urology, Connecticut Children's, 282 Washington Street, Hartford, CT, 06106, USA.
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Jaramillo AF, Martinez JC, Flores P, Medina C, Rojas D, Díaz-Gómez A, Fuentealba C, Meléndrez MF. Condensed tannin resins extracted from Pinus radiata bark as a support matrix in carbon nanofiber-reinforced polymers. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-020-03530-8] [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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Blatter M, Medina C, Shell K, Rijkenhuizen ABM. Unilateral left-sided nephrectomy in a horse with ureteropyelonephritis. PFERDEHEILKUNDE 2022. [DOI: 10.21836/pem20220104] [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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Medina C, Monge A, Romero M, López-Ridaura R, Barquera S, Romieu I, Denova-Gutiérrez E, Lajous M. Reliability and validity of the Mexican teachers' physical activity questionnaire (MTPAQ) in a subsample of female Mexican teachers. BMC Sports Sci Med Rehabil 2021; 13:143. [PMID: 34758874 PMCID: PMC8582186 DOI: 10.1186/s13102-021-00371-4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 11/01/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Reliable and valid instruments are needed to estimate physical activity levels. The purposes of this study were to estimate the reliability and validity of the Physical Activity Questionnaire (MTPAQ) in a subsample of the Mexican Teachers Cohort study. METHODS We completed telephone interviews and clinical examinations of 82 teachers. Two MTPAQ, five International Physical Activity Questionnaire (IPAQ)-long form, and two accelerometer (AC) measures were used to determine physical activity levels throughout 24 months. Moderate and walking physical activity (MWPA min/week), vigorous physical activity (VPA min/week), and moderate-to-vigorous physical activity minutes per week (MVPA min/week) were estimated for each instrument. Pearson, Intra-class correlations and deattenuated adjustments were used to determine the reliability and validity of MTPAQ. RESULTS MWPA and MVPA min/week of MTPAQs were moderately correlated (r ≥ 0.54) to min/week of IPAQ-long form. MWPA and MVPA min/week average MTPAQ and MTPAQ1 and average AC, AC1 and AC2 were fairly correlated (r ≥ 0.20). A higher correlation was observed when correlation coefficients were attenuated (r ≥ 0.32). CONCLUSIONS MTPAQ1 is a reliable and valid tool to measure physical activity levels.
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Affiliation(s)
- C Medina
- Center for Nutrition and Health Research, Mexican National Institute of Public Health (INSP), Avenida Universidad 655, Santa María Ahuacatitlán, 62100, Cuernavaca, Morelos, Mexico
| | - A Monge
- Center for Research on Population Health, National Institute of Public Health, Mexico City, Mexico
| | - M Romero
- Center for Research in Evaluation and Surveys, National Institute of Public Health, Mexico City, Mexico
| | - R López-Ridaura
- National Center for Preventive Programs and Disease Control. Ministry of Health, Mexico City, Mexico
| | - S Barquera
- Center for Nutrition and Health Research, Mexican National Institute of Public Health (INSP), Avenida Universidad 655, Santa María Ahuacatitlán, 62100, Cuernavaca, Morelos, Mexico
| | - I Romieu
- Section of Nutrition and Metabolism. International Agency for Research on Cancer, Lyon, France
| | - E Denova-Gutiérrez
- Center for Nutrition and Health Research, Mexican National Institute of Public Health (INSP), Avenida Universidad 655, Santa María Ahuacatitlán, 62100, Cuernavaca, Morelos, Mexico.
| | - M Lajous
- Center for Research on Population Health, National Institute of Public Health, Mexico City, Mexico
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Troncoso R, Medina C, Reategui J. REPRODUCTIVE PERFORMANCE OF BROWN SWISS AND MESTIZO BOVINE IN HUMID TROPIC. SPERMOVA 2021. [DOI: 10.18548/aspe/0009.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The ability of ruminants to regulate body temperature depends on the genotype. Dairy breeds are generally more sensitive to heat stress than beef breeds. Higher-producing animals are more susceptible to heat stress because they generate more metabolic heat. The objective of evaluating reproductive performance as a response of adaptability to the management and climatic conditions of the Humid Tropics. 78 animals were used (40 Brown Swiss, from Puno and 38 Mestizas from local origin) raised in humid tropic conditions. Parametric statistics are presented as analysis of measures of central tendency and dispersion, non-parametric statistics by frequency analysis, the χ2 test of independence was used to detect differences, α = 0.05. The categorized and continuous dependent variables were evaluated with Student's t test using SPSS Software v.23. The mean age at first estrus in Brown Swiss was 12.43 months, in mestizo cattle 18.68 months (P <0.05). Average age of first calving in Brown Swiss of 25.25 months versus mestizo cattle 28.34 months (P <0.05). Interval from calving to the first service in Brown Swiss was 99.29 days. Open days observed in Brown Swiss was 107.29 days. The pregnancy rate at the first service in Brown Swiss was 70.0% pregnancy at the first service and 30.0% at the second service, for the mestizo genotype it was 68.4% at the first service, 28.9 at the second and 2.6 at the third service (P> 0.05; X2 = 0.50; p = 0.47). It is concluded that bovine animals of the Brown Swiss genotype have a good reproductive performance in the Humid Tropic climate compared to the Mestizo genotype
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Mejía F, Medina C, Cornejo E, Morello E, Vásquez S, Alave J, Schwalb A, Málaga G. Oxygen saturation as a predictor of mortality in hospitalized adult patients with COVID-19 in a public hospital in Lima, Peru. PLoS One 2020; 15:e0244171. [PMID: 33370364 PMCID: PMC7769479 DOI: 10.1371/journal.pone.0244171] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/06/2020] [Indexed: 01/10/2023] Open
Abstract
INTRODUCTION Peru is among the top ten countries with the highest number of coronavirus disease 2019 (COVID-19) cases worldwide. The aim of the study was to describe the clinical features of hospitalized adult patients with COVID-19 and to determine the prognostic factors associated with in-hospital mortality. METHODS We conducted a retrospective cohort study among adult patients with COVID-19 admitted to Hospital Cayetano Heredia; a tertiary care hospital in Lima, Peru. The primary outcome was in-hospital mortality. Multivariate Cox proportional hazards regression was used to identify factors independently associated with in-hospital mortality. RESULTS A total of 369 patients (median age 59 years [IQR:49-68]; 241 (65.31%) male) were included. Most patients (68.56%) reported at least one comorbidity; more frequently: obesity (42.55%), diabetes mellitus (21.95%), and hypertension (21.68%). The median duration of symptoms prior to hospital admission was 7 days (IQR: 5-10). Reported in-hospital mortality was 49.59%. By multiple Cox regression, oxygen saturation (SaO2) values of less than 90% on admission correlated with mortality, presenting 1.86 (95%CI: 1.02-3.39), 4.44 (95%CI: 2.46-8.02) and 7.74 (95%CI: 4.54-13.19) times greater risk of death for SaO2 of 89-85%, 84-80% and <80%, respectively, when compared to patients with SaO2 >90%. Additionally, age >60 years was associated with 1.88 times greater mortality. CONCLUSIONS Oxygen saturation below 90% on admission is a strong predictor of in-hospital mortality in patients with COVID-19. In settings with limited resources, efforts to reduce mortality in COVID-19 should focus on early identification of hypoxemia and timely access to hospital care.
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Affiliation(s)
- Fernando Mejía
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
- Hospital Cayetano Heredia, Lima, Peru
- * E-mail:
| | - Carlos Medina
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
- Hospital Cayetano Heredia, Lima, Peru
| | - Enrique Cornejo
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
- Hospital Cayetano Heredia, Lima, Peru
| | | | | | - Jorge Alave
- Hospital Cayetano Heredia, Lima, Peru
- School of Medicine, Universidad Peruana Unión, Lima, Peru
| | - Alvaro Schwalb
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
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Villa B, García E, Pradena M, Flores P, Medina C, Campos-Requena VH, Urbano BF. SURFACE MODIFICATION OF RUBBER FROM END-OF-LIFE TIRES FOR USE IN CONCRETE: A DESIGN OF EXPERIMENTS APPROACH. J Chil Chem Soc 2020. [DOI: 10.4067/s0717-97072020000404988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Diaz Exposito A, Ruiz Salas A, Medina C, Barrera A, Alzueta J, Gomez Doblas J. Threshold stability using active fixation LV lead. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0805] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
The proper functioning of the CRT devices depends on the correct positioning of the electrodes, sometimes being compromised by the absence of suitable epicardial veins, leads instability or unacceptable high thresholds, among other. In 2017, a novel quadripolar active fixation LV lead was released with an innovative helical mechanism that expands to attach the lead within the vessel.
Objectives
Study the impact of the active fixation LV lead on threshold stability and dislocations.
Methods
We included 127 consecutive patients undergoing CRT between September 2017 to December 2019 in one hospital. They were randomly assigned: 62p active fixation VI leads vs 65p standard VI leads. LV thresholds, capture losses and dislocations were collected at standard pacing checks (1 week, 2 months, 6 months).
Results
The mean age of the sample was 73,9±8,4 years. 75% patients were male and 48,4% suffered ischemic cardiomyopathy. The two groups were similar according to this variables. 5 (7.7%) dislocations were reported in the control group against 2 (3.2%) in the active fixation group (n.s). The mean threshold (V) at the moment of the implant was 1,4 in the active fixation vs 1,41 in the standard LV leads; at the first visit 1,55 vs 1,99; at two months 1,59 vs 2,13 and at six months 1,74 vs 2,48.
The threshold stability is shown in Figure 1.
Conclusions
– The active fixation LV lead provides higher threshold stability than the conventional one.
– There is a non-significant tendency to reduce dislocations.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A Ruiz Salas
- University Hospital Virgen de la Victoria, Malaga, Spain
| | - C Medina
- University Hospital Virgen de la Victoria, Malaga, Spain
| | - A Barrera
- University Hospital Virgen de la Victoria, Malaga, Spain
| | - J Alzueta
- University Hospital Virgen de la Victoria, Malaga, Spain
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Jiménez-Guerrero I, Acosta-Jurado S, Medina C, Ollero FJ, Alias-Villegas C, Vinardell JM, Pérez-Montaño F, López-Baena FJ. The Sinorhizobium fredii HH103 type III secretion system effector NopC blocks nodulation with Lotus japonicus Gifu. J Exp Bot 2020; 71:6043-6056. [PMID: 32589709 DOI: 10.1093/jxb/eraa297] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 06/19/2020] [Indexed: 05/06/2023]
Abstract
The broad-host-range bacterium Sinorhizobium fredii HH103 cannot nodulate the model legume Lotus japonicus Gifu. This bacterium possesses a type III secretion system (T3SS), a specialized secretion apparatus used to deliver effector proteins (T3Es) into the host cell cytosol to alter host signaling and/or suppress host defence responses to promote infection. However, some of these T3Es are recognized by specific plant receptors and hence trigger a strong defence response to block infection. In rhizobia, T3Es are involved in nodulation efficiency and host-range determination, and in some cases directly activate host symbiosis signalling in a Nod factor-independent manner. In this work, we show that HH103 RifR T3SS mutants, unable to secrete T3Es, gain nodulation with L. japonicus Gifu through infection threads, suggesting that plant recognition of a T3E could block the infection process. To identify the T3E involved, we performed nodulation assays with a collection of mutants that affect secretion of each T3E identified in HH103 RifR so far. The nopC mutant could infect L. japonicus Gifu by infection thread invasion and switch the infection mechanism in Lotus burttii from intercellular infection to infection thread formation. Lotus japonicus gene expression analysis indicated that the infection-blocking event occurs at early stages of the symbiosis.
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Affiliation(s)
- Irene Jiménez-Guerrero
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
| | | | - Carlos Medina
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
| | | | - Cynthia Alias-Villegas
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
| | - José María Vinardell
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
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Cruz-Barrera M, Flórez-Zapata N, Lemus-Diaz N, Medina C, Galindo CC, González-Acero LX, Correa L, Camacho B, Gruber J, Salguero G. Integrated Analysis of Transcriptome and Secretome From Umbilical Cord Mesenchymal Stromal Cells Reveal New Mechanisms for the Modulation of Inflammation and Immune Activation. Front Immunol 2020; 11:575488. [PMID: 33117373 PMCID: PMC7561386 DOI: 10.3389/fimmu.2020.575488] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 06/29/2020] [Accepted: 09/03/2020] [Indexed: 12/19/2022] Open
Abstract
Mesenchymal stromal cells (MSC) have been used in over 800 clinical trials with encouraging results in the field of transplant medicine and chronic inflammatory diseases. Today, Umbilical Cord (UC)-derived MSC are the second leading source used for clinical purposes, mainly due to its easy access and superior immune modulatory effects. Although the underlying molecular mechanisms of immune suppressive activities have not been fully understood, research over the last decade strongly suggests that MSC-mediated benefits are closely related to activation of secretome networks. Nevertheless, recent findings also point to cytokine-independent mechanisms as key players of MSC-mediated immune modulation. Here, we set up a robust in vitro immune assay using phytohemagglutinin- or anti-CD3/CD28-treated human peripheral blood mononuclear cells in cell-to-cell interaction or in cell-contact independent format with UC-MSC and conducted integrated transcriptome and secretome analyses to dissect molecular pathways driving UC-MSC-mediated immune modulation. Under inflammatory stimuli, multiparametric analyses of the secretome led us to identify cytokine/chemokine expression patterns associated with the induction of MSC-reprogrammed macrophages and T cell subsets ultimately leading to immune suppression. UC-MSC transcriptome analysis under inflammatory challenge allowed the identification of 47 differentially expressed genes, including chemokines, anti- and pro-inflammatory cytokines and adhesion molecules found also in UC-MSC-immunosupressive secretomes, including the novel candidate soluble IL-2R. This study enabled us to track functionally activated UC-MSC during immune suppression and opened an opportunity to explore new pathways involved in immunity control by UC-MSC. We propose that identified immunomodulatory molecules and pathways could potentially be translated into clinical settings in order to improve UC-MSC-therapy quality and efficacy.
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Affiliation(s)
- Mónica Cruz-Barrera
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Nathalia Flórez-Zapata
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia.,Universidad EIA, Envigado, Colombia
| | - Nicolás Lemus-Diaz
- Junior Research Group Medical RNA Biology, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
| | - Carlos Medina
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Cristian-Camilo Galindo
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Lorena-Xiomara González-Acero
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Luz Correa
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Bernardo Camacho
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
| | - Jens Gruber
- Junior Research Group Medical RNA Biology, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
| | - Gustavo Salguero
- Advanced Therapies Unit, Instituto Distrital de Ciencia Biotecnología e Innovación en Salud - IDCBIS, Bogotá, Colombia
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Fahmy UA, Ahmed OAA, Badr-Eldin SM, Aldawsari HM, Okbazghi SZ, Awan ZA, Bakhrebah MA, Alomary MN, Abdulaal WH, Medina C, Alhakamy NA. Optimized Nanostructured Lipid Carriers Integrated into In Situ Nasal Gel for Enhancing Brain Delivery of Flibanserin. Int J Nanomedicine 2020; 15:5253-5264. [PMID: 32801690 PMCID: PMC7386805 DOI: 10.2147/ijn.s258791] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 04/25/2020] [Accepted: 07/04/2020] [Indexed: 12/13/2022] Open
Abstract
Background and Aim Flibanserin (FLB) is a multifunctional serotonergic agent used for treating hypoactive sexual desire disorder in premenopausal women via oral administration. FLB has a reported limited oral bioavailability of 33% that could be attributed to the drug’s first-pass metabolism. In addition, FLB has a pH-dependent solubility that could be a challenging factor for drug dissolution in the body neutral fluid, and consequently, absorption via mucosal barriers. Thus, this work aims at investigating the potential of utilizing nanostructured lipid carriers (NLCs) to overcome the aforementioned drawbacks and to enhance nose-to-brain drug delivery. Methods Box-Behnken design was applied to explore the impact of solid lipid % (SL%, X1), liquid lipid % (LL%, X2), and sonication time (ST, X3) on particle size. The optimized NLC formulation was characterized and incorporated into gellan gum in situ gel. The prepared gel was subjected to in vitro drug release, in vivo pharmacokinetic performance, and histopathological assessment in rats. Results Statistical analysis revealed a significant negative effect for both SL% and ST on NLCs size. In contrast, a significant positive effect was observed for the LL%. The optimized formulation showed spherical shape with vesicular size of 114.63 nm. The optimized FLB-NLC in situ gel exhibited adequate stability and enhanced in vitro release compared to raw FLB control gel. The plasma and brain concentrations of the drug after nasal administration in rats increased by more than 3–6-fold, respectively, compared to raw FLB in situ gel. In addition, the histopathological studies revealed the absence of any pathological signs. Conclusion The aforementioned results highlight the safety of FLB-NLC in situ nasal gel and its potential to improve the drug bioavailability and brain delivery.
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Affiliation(s)
- Usama A Fahmy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Osama A A Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Shaimaa M Badr-Eldin
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Hibah M Aldawsari
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Solomon Z Okbazghi
- Global Analytical and Pharmaceutical Development, Alexion Pharmaceuticals, New Haven, Connecticut, NE 06510, USA
| | - Zuhier A Awan
- Department of Clinical Biochemistry, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Muhammed A Bakhrebah
- Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Kingdom of Saudi Arabia
| | - Mohammad N Alomary
- Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Kingdom of Saudi Arabia
| | - Wesam H Abdulaal
- Department of Biochemistry, Cancer Metabolism and Epigenetic Unit, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Carlos Medina
- School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin Ireland
| | - Nabil A Alhakamy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
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O’Sullivan S, Wang J, Radomski MW, Gilmer JF, Medina C. Novel Barbiturate-Nitrate Compounds Inhibit the Upregulation of Matrix Metalloproteinase-9 Gene Expression in Intestinal Inflammation through a cGMP-Mediated Pathway. Biomolecules 2020; 10:biom10050808. [PMID: 32466182 PMCID: PMC7277209 DOI: 10.3390/biom10050808] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 02/07/2023] Open
Abstract
Matrix metalloproteinase-9 is upregulated in inflammatory bowel disease. Barbiturate nitrate hybrid compounds have been designed to inhibit MMP secretion and enzyme activity. In this study, we investigated the mechanism of action of barbiturate-nitrate hybrid compounds and their component parts using models of intestinal inflammation in vitro. Cytokine-stimulated Caco-2 cells were used in all in vitro experiments. The NO donors SNAP and DETA-NONOate were used to study the effect of NO on MMP-9 mRNA. Mechanistic elucidation was carried out using the soluble guanylate cyclase (sGC) inhibitor, ODQ, and the cGMP analogue, 8-Bromo-cGMP. Further experiments were carried out to elucidate the role of NF-κB. NO donors exerted an inhibitory effect on MMP-9 mRNA in cytokine-stimulated cells. While the non-nitrate barbiturates had a limited effect on MMP-9 expression, the hybrid compounds inhibited MMP-9 expression through its NO-mimetic properties. No effect could be observed on mRNA for MMP-1 or MMP-2. The sGC inhibitior, ODQ, abolished the nitrate-barbiturate inhibition of MMP-9 gene expression, an effect which was reversed by 8-Br-cGMP. This study shows that the barbiturate scaffold is suitable for hybrid design as an MMP-9 inhibitor in cytokine-stimulated Caco-2 cells. The inhibition of MMP-9 levels was largely mediated through a reduction in its mRNA by a sGC/cGMP pathway mediated mechanism.
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Rodríguez G, Sáez Del Bosque IF, Asensio E, Sánchez de Rojas MI, Medina C. Construction and demolition waste applications and maximum daily output in Spanish recycling plants. Waste Manag Res 2020; 38:423-432. [PMID: 32072878 DOI: 10.1177/0734242x20904437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 06/10/2023]
Abstract
The pursuit of construction sustainability has driven the use of partially or wholly waste-based eco-materials. New applications are being sought for recycled aggregate (RA) to further the use of this material and ensure the survival of the construction and demolition waste (C&DW) industry. RA, currently used in the construction of pavements, fills and embankments and only incipiently to manufacture structural or non-structural concrete, is a mere 8.99% of the total aggregate extracted in EU countries where RA is produced. Against this backdrop, the utility of this study lies in the overview afforded of RA typology, the application of the product in bound or unbound materials, the pursuit of new applications, structural or otherwise, and the assessment of daily maximum output by C&DW recycling facilities in Spain. The findings show that irrespective of its origin, RA most commonly adopts the form of wet mix macadam, gravel or sand used primarily in unbound applications with only dubious quality standards. Plant managers contend that RA from clean waste can feasibly be used in bound applications that require higher-performance materials. Maximum daily output varies widely, with capacity under 200 t d-1 in 30% of the plants. One of the conclusions drawn is that the current business model is in need of revision, with an emphasis on aggregate quality control (certification) and the adoption of technology for separating out impurities, pollutants and undesirable materials to improve the quality of RA.
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Affiliation(s)
- G Rodríguez
- Higher Technical School of Civil Engineering, University of Granada, Spain
| | - I F Sáez Del Bosque
- Research Institute for Sustainable Land Development (INTERRA), University of Extremadura, Spain
| | - E Asensio
- Eduardo Torroja Institute for Construction Sciences, Spain
| | - M I Sánchez de Rojas
- Eduardo Torroja Institute for Construction Sciences, Spain
- UEX-CSIC Partnering Unit, Spain
| | - C Medina
- Research Institute for Sustainable Land Development (INTERRA), University of Extremadura, Spain
- UEX-CSIC Partnering Unit, Spain
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Acosta-Jurado S, Alias-Villegas C, Navarro-Gómez P, Almozara A, Rodríguez-Carvajal MA, Medina C, Vinardell JM. Sinorhizobium fredii HH103 syrM inactivation affects the expression of a large number of genes, impairs nodulation with soybean and extends the host-range to Lotus japonicus. Environ Microbiol 2020; 22:1104-1124. [PMID: 31845498 DOI: 10.1111/1462-2920.14897] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 12/12/2019] [Indexed: 12/22/2022]
Abstract
Sinorhizobium fredii HH103 RifR is a broad host-range rhizobial strain able to nodulate with soybean and Lotus burttii, but it is ineffective with L. japonicus. Here, we study the role of the HH103 RifR SyrM protein in the regulation of gene expression and its relevance in symbiosis with those three legumes. RNAseq analyses show that HH103 SyrM is an important transcriptional regulator not only in the presence of inducer flavonoids but also in its absence. Lack of SyrM increases Nod factors production and decreases genistein-mediated repression of exopolysaccharide production in HH103. In symbiosis, mutation of syrM partially impaired interaction with soybean but improves effectiveness with L. burttii and extends the host-rage to L. japonicus Gifu. In addition, HH103 syrM mutants enter in both Lotus species by infection threads, whereas HH103 uses the more primitive intercellular infection to enter into L. burttii roots These symbiotic phenotypes were previously observed in two other HH103 mutants affected in symbiotic regulators, nodD2 and nolR, revealing that in S. fredii HH103 numerous transcriptional regulators finely modulate symbiotic gene expression.
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Affiliation(s)
- Sebastián Acosta-Jurado
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
| | - Cynthia Alias-Villegas
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
| | - Pilar Navarro-Gómez
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
| | - Andrés Almozara
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
| | - Miguel A Rodríguez-Carvajal
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Calle Profesor García González 1, C. P. 41012, Sevilla, Spain
| | - Carlos Medina
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
| | - José-María Vinardell
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, C.P, 41012, Sevilla, Spain
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Jespersen S, Månsson F, Lindman J, Wejse C, Medina C, da Silva ZJ, Te D, Medstrand P, Esbjörnsson J, Hønge BL. HIV treatment in Guinea-Bissau: room for improvement and time for new treatment options. AIDS Res Ther 2020; 17:3. [PMID: 32019545 PMCID: PMC6998355 DOI: 10.1186/s12981-020-0259-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/16/2019] [Accepted: 01/21/2020] [Indexed: 11/10/2022] Open
Abstract
Despite advances in the treatment quality of HIV throughout the world, several countries are still facing numerous obstacles in delivering HIV treatment at a sufficiently high quality, putting patients' lives in jeopardy. The aim of this status article is to give an overview of HIV treatment outcomes in the West African country, Guinea-Bissau, and to assess how newer treatment strategies such as long-acting injectable drugs or an HIV cure may limit or stop the HIV epidemic in this politically unstable and low-resource setting. Several HIV cohorts in Guinea-Bissau have been established and are used as platforms for epidemiological, virological, immunological and clinical studies often with a special focus on HIV-2, which is prevalent in the country. The Bandim Health Project, a demographic surveillance site, has performed epidemiological HIV surveys since 1987 among an urban population in the capital Bissau. The Police cohort, an occupational cohort of police officers, has enabled analyses of persons seroconverting with estimated times of seroconversion among HIV-1 and HIV-2-infected individuals, allowing incidence measurements while the Bissau HIV Cohort and a newer Nationwide HIV Cohort have provided clinical data on large numbers of HIV-infected patients. The HIV cohorts in Guinea-Bissau are unique platforms for research and represent real life in many African countries. Poor adherence, lack of HIV viral load measurements, inadequate laboratory facilities, high rates of loss to follow-up, mortality, treatment failure and resistance development, are just some of the challenges faced putting the goal of "90-90-90″ for Guinea-Bissau well out of reach by 2020. Maintaining undetectable viral loads on treatment as a prerequisite of a cure strategy seems not possible at the moment. Thinking beyond one-pill-once-a-day, long-acting antiretroviral treatment options such as injectable drugs or implants may be a better treatment option in settings like Guinea-Bissau and may even pave the way for an HIV cure. If the delivery of antiretroviral treatment in sub-Saharan Africa in a sustainable way for the future should be improved by focusing on existing treatment options or through focusing on new treatment options remains to be determined.
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Medina C, Aserlind A, Mohamed A, Galli J, Potter J. Should women living with HIV be screened for pelvic floor disorder during a routine gynecological care visit? Am J Obstet Gynecol 2019. [DOI: 10.1016/j.ajog.2019.10.031] [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: 10/25/2022]
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Yébenes JC, Lorencio C, Esteban E, Espinosa L, Badia JM, Capdevila JA, Cisteró B, Moreno S, Calbo E, Jiménez-Fábrega X, Clèries M, Faixedas MT, Ferrer R, Vela E, Medina C, Rodríguez A, Netto C, Armero E, Solsona M, Lopez R, Granes A, Perez-Claveria V, Artigas A, Estany J. Interhospital Sepsis Code in Catalonia (Spain): Territorial model for initial care of patients with sepsis. Med Intensiva 2019; 44:36-45. [PMID: 31542182 DOI: 10.1016/j.medin.2019.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 04/08/2019] [Revised: 05/10/2019] [Accepted: 05/27/2019] [Indexed: 12/29/2022]
Abstract
Sepsis is a syndromic entity with high prevalence and mortality. The management of sepsis is standardized and exhibits time-dependent efficiency. However, the management of patients with sepsis is complex. The heterogeneity of the forms of presentation can make it difficult to detect and manage such cases, in the same way as differences in training, professional competences or the availability of health resources. The Advisory Commission for Patient Care with Sepsis (CAAPAS), comprising 7 scientific societies, the Emergency Medical System (SEM) and the Catalan Health Service (CatSalut), have developed the Interhospital Sepsis Code (CSI) in Catalonia (Spain). The general objective of the CSI is to increase awareness, promote early detection and facilitate initial care and interhospital coordination to attend septic patients in a homogeneous manner throughout Catalonia.
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Affiliation(s)
- J C Yébenes
- Servei de Medicina Intensiva, Hospital de Mataró, Mataró, España.
| | - C Lorencio
- Servei de Medicina Intensiva, Hospital Universitari Dr. Josep Trueta, Girona, España
| | - E Esteban
- Servei de Medicina Intensiva, Hospital Sant Joan de Déu, Barcelona, España
| | - L Espinosa
- Consorci Sanitari de Barcelona, CatSalut-Servei Català de la Salut, Barcelona, España
| | - J M Badia
- Servei de Cirurgia General, Hospital Fundació Asil de Granollers, Granollers, España
| | - J A Capdevila
- Servei de Medicina Interna, Hospital de Mataró, Mataró, España
| | - B Cisteró
- Servei d'Urgències, Corporació Sanitària Parc Taulí, Sabadell, España
| | - S Moreno
- Àrea Bàsica de Salut Gràcia, Barcelona, España
| | - E Calbo
- Servei de Medicina Interna-Malalties Infeccioses, Hospital Mutua de Terrassa, Terrassa, España
| | | | - M Clèries
- Unitat d'Informació i Coneixement, CatSalut-Servei Català de la Salut, Barcelona, España
| | - M T Faixedas
- Oficina Tècnica dels Registres de Codis d'Activació, CatSalut-Servei Català de la Salut, Barcelona, España
| | - R Ferrer
- Servei de Medicina Intensiva, Hospital Universitari Vall d'Hebron, Barcelona, España
| | - E Vela
- Unitat d'Informació i Coneixement, CatSalut-Servei Català de la Salut, Barcelona, España
| | - C Medina
- Oficina Tècnica dels Registres de Codis d'Activació, CatSalut-Servei Català de la Salut, Barcelona, España
| | - A Rodríguez
- Servei de Medicina Intensiva, Hospital Universitari Joan XXIII, Tarragona, España
| | - C Netto
- Servei d'Urgències, Corporació Sanitària Parc Taulí, Sabadell, España
| | - E Armero
- Servei d'Urgències, Hospital Comarcal de Blanes, Blanes, España
| | - M Solsona
- Servei de Medicina Intensiva, Hospital de Mataró, Mataró, España
| | - R Lopez
- Consorci Sanitari de Barcelona, CatSalut-Servei Català de la Salut, Barcelona, España
| | - A Granes
- Sistema d'Emergències Mèdiques (SEM)
| | | | - A Artigas
- Servei de Medicina Intensiva, Corporació Sanitària Parc Taulí, Sabadell, España
| | - J Estany
- Consorci Sanitari de Barcelona, CatSalut-Servei Català de la Salut, Barcelona, España
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Hante NK, Medina C, Santos-Martinez MJ. Effect on Platelet Function of Metal-Based Nanoparticles Developed for Medical Applications. Front Cardiovasc Med 2019; 6:139. [PMID: 31620449 PMCID: PMC6759469 DOI: 10.3389/fcvm.2019.00139] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022] Open
Abstract
Nanomaterials have been recently introduced as potential diagnostic and therapeutic tools in the medical field. One of the main concerns in relation to the use of nanomaterials in humans is their potential toxicity profile and blood compatibility. In fact, and due to their small size, NPs can translocate into the systemic circulation even after dermal contact, inhalation, or oral ingestion. Once in the blood stream, nanoparticles become in contact with the different components of the blood and can potentially interfere with normal platelet function leading to bleeding or thrombosis. Metallic NPs have been already used for diagnosis and treatment purposes due to their unique characteristics. However, the potential interactions between metallic NPs and platelets has not been widely studied and reported. This review focuses on the factors that can affect platelet activation and aggregation by metal NPs and the nature of such interactions, providing a summary of the effect of various metal NPs on platelet function available in the literature.
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Affiliation(s)
- Nadhim Kamil Hante
- The School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- College of Pharmacy, University of Kufa, Najaf, Iraq
| | - Carlos Medina
- The School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Maria Jose Santos-Martinez
- The School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- School of Medicine, Trinity College Dublin, The University of Dublin, Dublin, Ireland
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Dempsey E, Abautret-Daly Á, Docherty NG, Medina C, Harkin A. Persistent central inflammation and region specific cellular activation accompany depression- and anxiety-like behaviours during the resolution phase of experimental colitis. Brain Behav Immun 2019; 80:616-632. [PMID: 31063848 DOI: 10.1016/j.bbi.2019.05.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/18/2019] [Accepted: 05/03/2019] [Indexed: 02/08/2023] Open
Abstract
Depression and anxiety-related psychological symptoms are increasingly recognised as important co-morbidities in patients with inflammatory bowel disease (IBD). Dextran sulfate sodium (DSS) -induced colitis is an animal model of IBD in which afferent activation of the gut-brain axis can be assessed and explored as a source of behavioural change. Exposure of adult male Wistar rats to DSS (5%) in drinking water induced distal colitis. In parallel to local inflammatory responses in the gut wall, increased expression of IL-6 and iNOS was found in the cerebral cortex and an increase in ventricular volume. Immunoreactivity of immediate early gene FosB/ΔFosB activation was measured as an index of cellular activation and was increased in the nucleus accumbens and dorsal raphe nucleus in acutely colitic animals. Following resolution of the acute colitic response, sustained anhedonia in the saccharin preference test, immobility in the forced swim test, reduced burying behaviour in the marble burying test, and mild signs of anxiety in the elevated plus maze and light/dark box were observed. Central increases in iNOS expression persisted during the recovery phase and mapped to reactive microglia, particularly those found in the parenchyma surrounding circumventricular regions. Evidence of associated nitration was also found. Sustained increases in ventricular volume and reduced T2 magnetic resonance relaxometry time in cortical regions were observed during the recovery period. FosB/ΔFosB activation was evident in the dorsal raphe during recovery. Persistent central inflammation and cellular activation may underpin the emergence of symptoms of depression and anxiety in experimental colitis.
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Affiliation(s)
- Elaine Dempsey
- Neuropsychopharmacology Research Group, Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland; School of Pharmacy & Pharmaceutical Sciences, Trinity College, Dublin 2, Ireland
| | - Áine Abautret-Daly
- Neuropsychopharmacology Research Group, Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland; School of Pharmacy & Pharmaceutical Sciences, Trinity College, Dublin 2, Ireland
| | - Neil G Docherty
- Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland; Department of Physiology, School of Medicine, Trinity College, Dublin 2, Ireland
| | - Carlos Medina
- School of Pharmacy & Pharmaceutical Sciences, Trinity College, Dublin 2, Ireland; Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
| | - Andrew Harkin
- Neuropsychopharmacology Research Group, Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland; School of Pharmacy & Pharmaceutical Sciences, Trinity College, Dublin 2, Ireland.
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López-Baena FJ, Vinardell JM, Medina C. Regulation of Protein Secretion Systems Mediated by Cyclic Diguanylate in Plant-Interacting Bacteria. Front Microbiol 2019; 10:1289. [PMID: 31263457 PMCID: PMC6584795 DOI: 10.3389/fmicb.2019.01289] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 02/27/2019] [Accepted: 05/23/2019] [Indexed: 11/13/2022] Open
Abstract
The ubiquitous second messenger cyclic diguanylate (c-di-GMP) is involved in the regulation of different processes in bacteria. In phytopathogens, intracellular fluctuations in the concentration of this molecule contribute to the lifestyle switching from a motile and virulent stage to a sessile and biofilm-forming phase. Among the virulence mechanisms used by bacterial pathogens, different specific type secretion systems (TSSs) and the effector proteins that they translocate are included. Some of these TSS are conceived to suppress host immune responses during bacterial colonization. The modulation of the expression of secretion systems components and/or effector proteins can be influenced by c-di-GMP levels at transcriptional, translational, or post-translational levels and can take place directly by binding to specific or global regulators, or via transducer proteins. Different genera of plant-interacting bacteria have been analyzed to shed some light in the implications of c-di-GMP in the regulation of host plant colonization through protein secretion systems. Expression of (1) adhesins secreted by Type 1 secretion systems to bind the host plant in Pectobacterium (formerly Erwinia) and some beneficial Pseudomonas strains; (2) catalytic exoproteins delivered by Type 2 secretion systems to break plant cell wall in Dickeya; (3) effectors secreted by Type 3 secretion systems to suppress plant immunity in Xanthomonas; or (4) the activity of Type 6 secretion systems to export an ATPase in Pseudomonas, are finely tuned by c-di-GMP levels. In this minireview, we summarize the knowledge available about the implications of c-di-GMP in the regulation of protein secretion in different plant-interacting bacteria. Topic: Secretion systems and effector proteins of phytopathogenic and beneficial bacteria regulated by NSM.
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Affiliation(s)
| | - Jose María Vinardell
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
| | - Carlos Medina
- Departamento de Microbiología, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain
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Jaramillo AF, Riquelme SA, Sánchez-Sanhueza G, Medina C, Solís-Pomar F, Rojas D, Montalba C, Melendrez MF, Pérez-Tijerina E. Comparative Study of the Antimicrobial Effect of Nanocomposites and Composite Based on Poly(butylene adipate-co-terephthalate) Using Cu and Cu/Cu 2O Nanoparticles and CuSO 4. Nanoscale Res Lett 2019; 14:158. [PMID: 31073776 PMCID: PMC6509317 DOI: 10.1186/s11671-019-2987-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/22/2019] [Indexed: 05/28/2023]
Abstract
Nanocomposites and a composite based on poly(butylene adipate-co-terephthalate) (PBAT) were synthesized using commercial copper nanoparticles (Cu-NPs), copper/cuprous oxide nanoparticles (Cu|Cu2O-NPs), and copper sulfate (CuSO4), respectively. The Cu|Cu2O-NPs were synthesized using chemical reduction and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The synthesis of Cu|Cu2O-NPs yielded a mixture of Cu and Cu2O, with metal Cu having a spherical morphology of approximately 40 nm in diameter and Cu2O with a diameter of 150 nm. To prepare the nanocomposites (NCs) and the composite material (MC), the NPs and the CuSO4 salt were incorporated into the PBAT matrix in concentrations of 1, 3, and 5% p/p via an ex situ method. Fourier transform infrared spectroscopy (FTIR), a tensile test, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and agar diffusion assays were used for structural, thermomechanical, and antimicrobial characterization. Results showed that the reinforcements did not modify the chemical structure of the PBAT and only slightly increased the percentage of crystallization. The mechanical and thermal properties of the PBAT did not change much with the addition of fillers, except for a slight increase in tensile strength and thermal stability, respectively. The agar diffusion antimicrobial assays showed that the NCs and MCs had good inhibitory responses against the nonresistant strains Enterococcus faecalis, Streptococcus mutans, and Staphylococcus aureus. The MCs based on CuSO4 had the highest biocidal effect, even against the resistant bacteria Acinetobacter baumannii.
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Affiliation(s)
- A. F. Jaramillo
- Department of Mechanical Engineering, Universidad de La Frontera, Francisco Salazar 01145, 4780000 Temuco, Chile
| | - S. A. Riquelme
- Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepción, 270 Edmundo Larenas, Box 160-C, 4070409 Concepción, Chile
| | - G. Sánchez-Sanhueza
- Department of Restorative Dentistry, Endodontic Discipline, Faculty of Dentistry, University of Concepción, Concepción, Chile
| | - C. Medina
- Department of Mechanical Engineering (DIM), Faculty of Engineering, University of Concepción, 219 Edmundo Larenas, Concepción, Chile
| | - F. Solís-Pomar
- Nanoscience and Nanotechnology Laboratory, Faculty of Physical-Mathematical Sciences, Universidad Autónoma de Nuevo León, 66451 San Nicolas de los Garza, Nuevo León México
| | - D. Rojas
- Advanced Nanocomposites Research Group (GINA), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepción, 270 Edmundo Larenas, Box 160-C, 4070409 Concepción, Chile
| | - C. Montalba
- Departamento de Tecnologías Industriales, Universidad de Talca, Camino a Los Niches KM 1, Curicó, Chile
| | - M. F. Melendrez
- Advanced Nanocomposites Research Group (GINA), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepción, 270 Edmundo Larenas, Box 160-C, 4070409 Concepción, Chile
| | - E. Pérez-Tijerina
- Nanoscience and Nanotechnology Laboratory, Faculty of Physical-Mathematical Sciences, Universidad Autónoma de Nuevo León, 66451 San Nicolas de los Garza, Nuevo León México
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Villalobos RJ, Medina C, Canales C, Melendrez M, Flores PF. Development of nanocomposite materials with thermostable matrix from nanoreinforcement of titanium dioxide (TNPS and TNTS) and zinc oxide (ZNPS and ZNBS) on epoxy resin matrix. ACTA ACUST UNITED AC 2019. [DOI: 10.34294/j.jsta.19.6.42] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Camacho M, Medina C, Rodríguez-Navarro DN, Temprano Vera F. Biodiversity of rhizobia present in plant nodules of Biserrula pelecinus across Southwest Spain. Syst Appl Microbiol 2019; 42:415-421. [PMID: 30952451 DOI: 10.1016/j.syapm.2019.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 12/17/2018] [Revised: 03/14/2019] [Accepted: 03/18/2019] [Indexed: 11/29/2022]
Abstract
Biodiversity studies of native Mesorhizobium spp. strains able to nodulate the annual herbaceous legume Biserrula pelecinus L. in soils from Southwest Spain have been carried out. One or two isolates per plant, 30 in total, were randomly selected for further characterization. There was no association between the presence of mesorhizobia nodulating-B. pelecinus and the chemical or textural properties of the soils. The isolates were tested for their symbiotic effectiveness on this forage legume under greenhouse conditions and characterized on the basis of physiological parameters: carbon source utilisation (API 50CH), 16S rRNA sequencing and ERIC-PCR, lipopolysaccharide, protein and plasmid profiles. Our results show that in spite of the great diversity found among the native isolates, most of them belong to the genus Mesorhizobium, the exception being strain B24 which sequence matches 97.52% with Neorhizobium huautlense; this is the first description of a Neorhizobium strain effectively nodulating-biserrula plants. Results of a field trial indicated that some of these isolates could be recommended as inoculants for this legume. B24=DSM 28743=CECT 8815; ENA (HF955513) 16S rRNA sequences of isolates B13, B18, B26, B30 and B1 are deposited at ENA under numbers LS999402 to LS999406, respectively.
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Affiliation(s)
- María Camacho
- IFAPA Centro Las Torres Tomejil, Ctra Sevilla-Cazalla Km 12, 2. 41200 Seville, Spain.
| | - Carlos Medina
- Department of Microbiology, Faculty of Biology, University of Seville, Avda. Reina Mercedes 6, 41012 Seville, Spain
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Paniz Mondolfi AE, Colmenares Garmendia A, Mendoza Pérez Y, Hernández-Pereira CE, Medina C, Vargas F, Sandoval D, Agüero J, Román D, Forlano-Riera M, Salas Y, Peraza M, Romero P, Aldana F, Castillo T, Santeliz S, Perez G, Suarez-Alvarado MJ, Morales-Panza RJ, Kato H. Autochthonous cutaneous leishmaniasis in urban domestic animals (Felis catus / Canis lupus familiaris) from central-western Venezuela. Acta Trop 2019; 191:252-260. [PMID: 30633896 DOI: 10.1016/j.actatropica.2019.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 10/04/2018] [Revised: 01/06/2019] [Accepted: 01/07/2019] [Indexed: 11/18/2022]
Abstract
Leishmaniasis is a zoonotic disease caused by intracellular protozoa of the Leishmania genus that are spread and transmitted by sandflies. Natural infection and clinical disease in domestic cats and dogs appear to be rare or perhaps largely under-reported in endemic areas. However, previous reports on infected domestic animals usually implicate the same Leishmania species that affect humans in tropical and subtropical areas of the world suggesting a potential role for zoonotic transmission. In the present study we assessed a representative sample of cats and dogs from endemic urban / suburban areas of Lara state in central western Venezuela. In both dogs and cats, cutaneous disease exhibits a spectrum of manifestations that range from single papules or nodules, which may evolve into ulcerative, plaque-like or scaly lesions. Cytochrome b (cyt b) PCR gene sequence analysis revealed L. mexicana as the causative agent in all cases, including two human cases proceeding from the same study area at the same time the study was carried out. In order to improve our understanding on feline/canine infection with Leishmania mexicana, and address potential zoonotic concerns it is necessary to characterize its enzootic reservoirs and vectors as well as the possible anthropophilic players linking to the peridomestic and domestic cycles.
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Affiliation(s)
- A E Paniz Mondolfi
- Clínica IDB Cabudare, Instituto de Investigaciones Biomédicas IDB, Department of Tropical Medicine and Infectious Diseases, Cabudare, Lara State 3023, Venezuela; Instituto Venezolano de los Seguros Sociales (IVSS), Caracas, Venezuela.
| | - A Colmenares Garmendia
- Infectious Diseases Research Incubator and the Zoonosis and Emerging Pathogens Regional Collaborative Network, Department of Tropical Medicine and Infectious Diseases, Clínica IDB Cabudare, Instituto de Investigaciones Biomédicas IDB, Cabudare, Lara State 3023, Venezuela; Health Sciences Department, School of Veterinary Medicine, Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - Y Mendoza Pérez
- Infectious Diseases Research Incubator and the Zoonosis and Emerging Pathogens Regional Collaborative Network, Department of Tropical Medicine and Infectious Diseases, Clínica IDB Cabudare, Instituto de Investigaciones Biomédicas IDB, Cabudare, Lara State 3023, Venezuela; Health Sciences Department, School of Veterinary Medicine, Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - C E Hernández-Pereira
- Infectious Diseases Research Incubator and the Zoonosis and Emerging Pathogens Regional Collaborative Network, Department of Tropical Medicine and Infectious Diseases, Clínica IDB Cabudare, Instituto de Investigaciones Biomédicas IDB, Cabudare, Lara State 3023, Venezuela; Health Sciences Department, College of Medicine. Universidad Centrooccidental Lisandro Alvarado. Barquisimeto, Lara State 3001, Venezuela
| | - C Medina
- Department of Public Health, Epidemiology and Zoonoses, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - F Vargas
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - D Sandoval
- Health Sciences Department, School of Veterinary Medicine, Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - J Agüero
- Departments of Small Animals and Dermatology, "Dr. Luis de Leon Clinic", Barquisimeto, Lara State 3023, Venezuela
| | - D Román
- Department of Surgery of Small Animals, INSUAGRO, Barquisimeto, Lara State, 3023, Venezuela
| | - M Forlano-Riera
- Department of Public Health, Veterinarian Parasitology, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - Y Salas
- Department of Medicine, Surgery and Pathology, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - M Peraza
- Department of Small Animals, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - P Romero
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - F Aldana
- Department of Small Animals, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - T Castillo
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - S Santeliz
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - G Perez
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - M J Suarez-Alvarado
- Infectious Diseases Research Incubator and the Zoonosis and Emerging Pathogens Regional Collaborative Network, Department of Tropical Medicine and Infectious Diseases, Clínica IDB Cabudare, Instituto de Investigaciones Biomédicas IDB, Cabudare, Lara State 3023, Venezuela; Health Sciences Department, College of Medicine. Universidad Centrooccidental Lisandro Alvarado. Barquisimeto, Lara State 3001, Venezuela
| | - R J Morales-Panza
- Department of Medicine and Surgery, School of Veterinary Medicine Universidad Centrooccidental Lisandro Alvarado, Cabudare, Lara State 3023, Venezuela
| | - H Kato
- Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Tochigi, Japan
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Shamskhou EA, Kratochvil MJ, Orcholski ME, Nagy N, Kaber G, Steen E, Balaji S, Yuan K, Keswani S, Danielson B, Gao M, Medina C, Nathan A, Chakraborty A, Bollyky PL, De Jesus Perez VA. Hydrogel-based delivery of Il-10 improves treatment of bleomycin-induced lung fibrosis in mice. Biomaterials 2019; 203:52-62. [PMID: 30852423 DOI: 10.1016/j.biomaterials.2019.02.017] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [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: 09/19/2018] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 02/06/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a life-threatening progressive lung disorder with limited therapeutic options. While interleukin-10 (IL-10) is a potent anti-inflammatory and anti-fibrotic cytokine, its utility in treating lung fibrosis has been limited by its short half-life. We describe an innovative hydrogel-based approach to deliver recombinant IL-10 to the lung for the prevention and reversal of pulmonary fibrosis in a mouse model of bleomycin-induced lung injury. Our studies show that a hyaluronan and heparin-based hydrogel system locally delivers IL-10 by capitalizing on the ability of heparin to reversibly bind IL-10 without bleeding or other complications. This formulation is significantly more effective than soluble IL-10 for both preventing and reducing collagen deposition in the lung parenchyma after 7 days of intratracheal administration. The anti-fibrotic effect of IL-10 in this system is dependent on suppression of TGF-β driven collagen production by lung fibroblasts and myofibroblasts. We conclude that hydrogel-based delivery of IL-10 to the lung is a promising therapy for fibrotic lung disorders.
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Affiliation(s)
- Elya A Shamskhou
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Michael J Kratochvil
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA; Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Mark E Orcholski
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Nadine Nagy
- Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Gernot Kaber
- Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Emily Steen
- Department of Surgery, Division of Pediatric Surgery, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, 77030, USA
| | - Swathi Balaji
- Department of Surgery, Division of Pediatric Surgery, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, 77030, USA
| | - Ke Yuan
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Sundeep Keswani
- Department of Surgery, Division of Pediatric Surgery, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, 77030, USA
| | - Ben Danielson
- Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Max Gao
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Carlos Medina
- Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Abinaya Nathan
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Ananya Chakraborty
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Paul L Bollyky
- Department of Medicine, Division of Infectious Disease, Stanford University, Stanford, CA, 94305, USA
| | - Vinicio A De Jesus Perez
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Stanford University, Stanford, CA, 94305, USA.
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Zaballos P, del Pozo L, Argenziano G, Medina C, Lacarrubba F, Ferrer B, Martin J, Llambrich A, Zalaudek I, Bañuls J. Dermoscopy of cutaneous smooth muscle neoplasms: a morphological study of 136 cases. J Eur Acad Dermatol Venereol 2019; 33:693-699. [DOI: 10.1111/jdv.15392] [Citation(s) in RCA: 8] [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] [Received: 06/21/2018] [Accepted: 10/12/2018] [Indexed: 11/30/2022]
Affiliation(s)
- P. Zaballos
- Dermatology Department Hospital Sant Pau i Santa Tecla Tarragona Spain
| | - L.J. del Pozo
- Dermatology Department Hospital Universitari Son Espases Palma Mallorca Spain
| | - G. Argenziano
- Dermatology Department Second University of Naples Naples Italy
| | - C. Medina
- Dermatology Department Hospital Universitario de Gran Canaria “Doctor Negrín” Gran Canaria Spain
| | - F. Lacarrubba
- Dermatology Department University of Catania Catania Italy
| | - B. Ferrer
- Dermatology Department Hospital General Universitario de Valencia Valencia Spain
| | - J.M. Martin
- Dermatology Department Hospital Clínico Universitario Valencia Spain
| | - A. Llambrich
- Dermatology Department Hospital de Son Llatzer Palma de Mallorca Spain
| | - I. Zalaudek
- Dermatology Department University of Trieste Trieste Italy
| | - J. Bañuls
- Dermatology Department Hospital Universitario de Alicante ISABIAL Miguel Hernandez University Sant Joan de Alicante Spain
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Beck KB, Hønge BL, Olesen JS, Petersen MS, Jespersen S, Wejse C, da Silva ZJ, Medina C, Té DDS, Moeller BK, Benn CS, Aaby P, Erikstrup C. Long-term effects of smallpox vaccination on expression of the HIV-1 co-receptor CCR5 in women. PLoS One 2018; 13:e0207259. [PMID: 30440008 PMCID: PMC6237380 DOI: 10.1371/journal.pone.0207259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 10/29/2018] [Indexed: 01/16/2023] Open
Abstract
Background Smallpox vaccinations were stopped globally in 1980. Recent studies have shown that in women, being smallpox vaccinated was associated with a reduced risk of HIV infection compared with not being smallpox vaccinated. At the initial infection, HIV-1 most often uses CCR5 as a co-receptor to infect the T-lymphocytes. We therefore investigated whether smallpox vaccination is associated with a down-regulation of CCR5 on the surface of peripheral T-lymphocytes in healthy women in Guinea-Bissau. Methods We included HIV seronegative women from Bissau, Guinea-Bissau, born before 1974, with and without a smallpox vaccination scar. Blood samples were stabilised in a TransFix buffer solution and stained for flow cytometry according to a T-cell maturation profile. Results Ninety-seven women were included in the study; 52 with a smallpox vaccination scar and 45 without a scar. No association between smallpox vaccination scar and CCR5 expression was found in any T-lymphocyte subtype. Conclusion Among HIV seronegative women, being smallpox vaccinated more than 40 years ago was not associated with a down-regulation of CCR5 receptors on the surface of peripheral T-lymphocytes.
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Affiliation(s)
- K. B. Beck
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
- * E-mail:
| | - B. L. Hønge
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - J. S. Olesen
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - M. S. Petersen
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - S. Jespersen
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - C. Wejse
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- GloHAU, Center for Global Health, Dept of Public Health, Aarhus University, Aarhus, Denmark
| | - Z. J. da Silva
- National HIV programme, Ministry of Health, Bissau, Guinea-Bissau
| | - C. Medina
- National HIV programme, Ministry of Health, Bissau, Guinea-Bissau
| | - D. D. S. Té
- National HIV programme, Ministry of Health, Bissau, Guinea-Bissau
| | - B. K. Moeller
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - C. S. Benn
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Research Center for Vitamins and Vaccines (CVIVA), Bandim Health Project, Statens Serum Institut, Copenhagen, Denmark
| | - P. Aaby
- Bandim Health Project, Indepth network, Bissau, Guinea-Bissau
- Research Center for Vitamins and Vaccines (CVIVA), Bandim Health Project, Statens Serum Institut, Copenhagen, Denmark
| | - C. Erikstrup
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
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49
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50
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Restrepo I, Medina C, Meruane V, Akbari-Fakhrabadi A, Flores P, Rodríguez-Llamazares S. The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends. Polímeros 2018. [DOI: 10.1590/0104-1428.03117] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- Iván Restrepo
- Universidad de Concepción, Chile; Universidad de Concepción, Chile
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