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Micelly-Moreno J, Barreto-Santamaría A, Arévalo-Pinzón G, Firacative C, Gómez BL, Escandón P, Patarroyo MA, Muñoz JE. Therapeutic Use of the Antimicrobial Peptide PNR20 to Resolve Disseminated Candidiasis in a Murine Model. J Fungi (Basel) 2023; 9:1149. [PMID: 38132750 PMCID: PMC10744665 DOI: 10.3390/jof9121149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023] Open
Abstract
Invasive fungal infections (IFIs) caused by Candida species are an emerging threat globally, given that patients at-risk and antifungal resistance are increasing. Antimicrobial peptides (AMPs) have shown good therapeutic capacity against different multidrug-resistant (MDR) microorganisms. This study evaluated the activity of the synthetic peptide, PNR20, against Candida albicans ATCC 10231 and a MDR Colombian clinical isolate of Candida auris. Perturbation of yeast cell surface was evaluated using scanning electron microscopy. Cell viability of Vero cells was determined to assess peptide toxicity. Additionally, survival, fungal burden, and histopathology of BALB/c mice infected intravenously with each Candida species and treated with PNR20 were analyzed. Morphological alterations were identified in both species, demonstrating the antifungal effect of PNR20. In vitro, Vero cells' viability was not affected by PNR20. All mice infected with either C. albicans or C. auris and treated with PNR20 survived and had a significant reduction in the fungal burden in the kidney compared to the control group. The histopathological analysis in mice infected and treated with PNR20 showed more preserved tissues, without the presence of yeast, compared to the control groups. This work shows that the utilization of PNR20 is a promising therapeutic alternative against disseminated candidiasis.
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Affiliation(s)
- Jeisson Micelly-Moreno
- Faculty of Health Sciences, Universidad Colegio Mayor de Cundinamarca, Bogota 110311, Colombia;
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogota 111221, Colombia; (C.F.); (B.L.G.)
| | - Adriana Barreto-Santamaría
- Receptor-Ligand Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogota 111321, Colombia;
| | - Gabriela Arévalo-Pinzón
- Microbiology Department, Faculty of Sciences, Pontificia Universidad Javeriana, Carrera 7 #40–62, Bogota 110231, Colombia;
| | - Carolina Firacative
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogota 111221, Colombia; (C.F.); (B.L.G.)
| | - Beatriz L. Gómez
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogota 111221, Colombia; (C.F.); (B.L.G.)
| | - Patricia Escandón
- Microbiology Group, Instituto Nacional de Salud, Bogota 111321, Colombia;
| | - Manuel A. Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogota 111321, Colombia;
- Microbiology Department, Faculty of Medicine, Universidad Nacional de Colombia, Bogota 111321, Colombia
| | - Julián E. Muñoz
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogota 111221, Colombia; (C.F.); (B.L.G.)
- Public Health Research Group, School of Medicine and Health Sciences, Universidad del Rosario, Bogota 111221, Colombia
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2
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Torres R, Barreto-Santamaría A, Arévalo-Pinzón G, Firacative C, Gómez BL, Escandón P, Patarroyo MA, Muñoz JE. In Vitro Antifungal Activity of Three Synthetic Peptides against Candida auris and Other Candida Species of Medical Importance. Antibiotics (Basel) 2023; 12:1234. [PMID: 37627654 PMCID: PMC10451292 DOI: 10.3390/antibiotics12081234] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 08/27/2023] Open
Abstract
Candidiasis is an opportunistic infection affecting immunosuppressed and hospitalized patients, with mortality rates approaching 40% in Colombia. The growing pharmacological resistance of Candida species and the emergence of multidrug-resistant Candida auris are major public health problems. Therefore, different antimicrobial peptides (AMPs) are being investigated as therapeutic alternatives to control candidiasis effectively and safely. This work aimed to evaluate the in vitro antifungal activity of three synthetic AMPs, PNR20, PNR20-1, and 35409, against ATCC reference strains of Candida albicans, Candida glabrata, Candida parapsilosis, Candida krusei, and Candida tropicalis, and clinical isolates of C. auris. Antifungal susceptibility testing, determined by broth microdilution, showed that the AMPs have antifungal activity against planktonic cells of all Candida species evaluated. In C. auris and C. albicans, the peptides had an effect on biofilm formation and cell viability, as determined by the XTT assay and flow cytometry, respectively. Also, morphological alterations in the membrane and at the intracellular level of these species were induced by the peptides, as observed by transmission electron microscopy. In vitro, the AMPs had no cytotoxicity against L929 murine fibroblasts. Our results showed that the evaluated AMPs are potential therapeutic alternatives against the most important Candida species in Colombia and the world.
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Affiliation(s)
- Richar Torres
- Faculty of Health Sciences, Universidad Colegio Mayor de Cundinamarca, Bogotá 110311, Colombia;
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogotá 111221, Colombia; (C.F.); (B.L.G.)
| | - Adriana Barreto-Santamaría
- Receptor-Ligand Department Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 111321, Colombia; (A.B.-S.); (G.A.-P.)
| | - Gabriela Arévalo-Pinzón
- Receptor-Ligand Department Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 111321, Colombia; (A.B.-S.); (G.A.-P.)
| | - Carolina Firacative
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogotá 111221, Colombia; (C.F.); (B.L.G.)
| | - Beatriz L. Gómez
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogotá 111221, Colombia; (C.F.); (B.L.G.)
| | - Patricia Escandón
- Microbiology Group, Instituto Nacional de Salud, Bogotá 111321, Colombia;
| | - Manuel Alfonso Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 111321, Colombia;
- Microbiology Department, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá 111321, Colombia
| | - Julián E. Muñoz
- Studies in Translational Microbiology and Emerging Diseases (MICROS) Research Group, School of Medicine and Health Sciences, Universidad de Rosario, Bogotá 111221, Colombia; (C.F.); (B.L.G.)
- Public Health Research Group, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia
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3
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Ortega Suero G, Abenza Abildúa MJ, Serrano Munuera C, Rouco Axpe I, Arpa Gutiérrez FJ, Adarmes Gómez AD, Rodríguez de Rivera FJ, Quintans Castro B, Posada Rodríguez I, Vadillo Bermejo A, Domingo Santos Á, Blanco Vicente E, Infante Ceberio I, Pardo Fernández J, Costa Arpín E, Painous Martí C, Muñoz JE, Mir Rivera P, Montón Álvarez F, Bataller Alberola L, Gascón Bayarri J, Casasnovas Pons C, Vélez Santamaría V, López de Munain A, Fernández-Eulate G, Gazulla Abío J, Sanz Gallego I, Rojas Bartolomé L, Ayo Martín Ó, Segura Martín T, González Mingot C, Baraldés Rovira M, Sivera Mascaró R, Cubo Delgado E, Echavarría Íñiguez A, Vázquez Sánchez F, Bártulos Iglesias M, Casadevall Codina MT, Martínez Fernández EM, Labandeira Guerra C, Alemany Perna B, Carvajal Hernández A, Fernández Moreno C, Palacín Larroy M, Caballol Pons N, Ávila Rivera A, Navacerrada Barrero FJ, Lobato Rodríguez R, Sobrido Gómez MJ. Epidemiology of ataxia and hereditary spastic paraplegia in Spain: a cross-sectional study. Neurologia 2023:S2173-5808(23)00023-8. [PMID: 37120112 DOI: 10.1016/j.nrleng.2023.04.003] [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: 08/17/2020] [Accepted: 01/01/2021] [Indexed: 05/01/2023] Open
Abstract
INTRODUCTION Ataxia and hereditary spastic paraplegia are rare neurodegenerative syndromes. We aimed to determine the prevalence of these disorders in Spain in 2019. PATIENTS AND METHODS We conducted a cross-sectional, multicentre, retrospective, descriptive study of patients with ataxia and hereditary spastic paraplegia in Spain between March 2018 and December 2019. RESULTS We gathered data from a total of 1933 patients from 11 autonomous communities, provided by 47 neurologists or geneticists. Mean (SD) age in our sample was 53.64 (20.51) years; 982 patients were men (50.8%) and 951 were women (49.2%). The genetic defect was unidentified in 920 patients (47.6%). A total of 1371 patients (70.9%) had ataxia and 562 (29.1%) had hereditary spastic paraplegia. Prevalence rates for ataxia and hereditary spastic paraplegia were estimated at 5.48 and 2.24 cases per 100 000 population, respectively. The most frequent type of dominant ataxia in our sample was SCA3, and the most frequent recessive ataxia was Friedreich ataxia. The most frequent type of dominant hereditary spastic paraplegia in our sample was SPG4, and the most frequent recessive type was SPG7. CONCLUSIONS In our sample, the estimated prevalence of ataxia and hereditary spastic paraplegia was 7.73 cases per 100 000 population. This rate is similar to those reported for other countries. Genetic diagnosis was not available in 47.6% of cases. Despite these limitations, our study provides useful data for estimating the necessary healthcare resources for these patients, raising awareness of these diseases, determining the most frequent causal mutations for local screening programmes, and promoting the development of clinical trials.
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Affiliation(s)
- G Ortega Suero
- Servicio de Neurología, Hospital Alcázar de San Juan, Complejo La Mancha-Centro, Ciudad Real, Spain
| | - M J Abenza Abildúa
- Servicio de Neurología, Hospital Universitario Infanta Sofía, Madrid, Spain.
| | | | - I Rouco Axpe
- Servicio de Neurología, Hospital Universitario de Cruces, Bilbao, Spain
| | - F J Arpa Gutiérrez
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Asesoría Docente de Neurología, Hospital Clínico San Carlos, Madrid, Spain
| | - A D Adarmes Gómez
- Servicio de Neurología, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | | | - B Quintans Castro
- Fundación Pública Galega de Medicina Xenómica, Santiago de Compostela, Spain
| | - I Posada Rodríguez
- Servicio de Neurología, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - A Vadillo Bermejo
- Servicio de Neurología, Hospital Universitario Mancha Centro, Ciudad Real, Spain
| | - Á Domingo Santos
- Servicio de Neurología, Hospital G. Tomelloso, Ciudad Real, Spain
| | | | - I Infante Ceberio
- Servicio de Neurología, Hospital Universitario Marqués de Valdecilla, Cantabria, Spain
| | - J Pardo Fernández
- Servicio de Neurología, Hospital Clínico Santiago de Compostela, Galicia, Spain
| | - E Costa Arpín
- Servicio de Neurología, Hospital Clínico Santiago de Compostela, Galicia, Spain
| | - C Painous Martí
- Servicio de Neurología, Unidad de Neurogenética, Hospital Universitario Clinic, Barcelona, Spain
| | - J E Muñoz
- Servicio de Neurología, Unidad de Neurogenética, Hospital Universitario Clinic, Barcelona, Spain
| | - P Mir Rivera
- Servicio de Neurología, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - F Montón Álvarez
- Servicio de Neurología, Hospital Nuestra señora de Candelaria, Tenerife, Spain
| | | | - J Gascón Bayarri
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, Spain
| | - C Casasnovas Pons
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, Spain
| | - V Vélez Santamaría
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, Spain
| | - A López de Munain
- Servicio de Neurología, Hospital Universitario Donostia, San Sebastián, Spain
| | - G Fernández-Eulate
- Servicio de Neurología, Hospital Universitario Donostia, San Sebastián, Spain
| | - J Gazulla Abío
- Servicio de Neurología, Hospital Universitario Miguel Servet, Zaragoza, Spain
| | - I Sanz Gallego
- Servicio de Neurología, Hospital Universitario Sonsoles, Ávila, Spain
| | - L Rojas Bartolomé
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, Spain
| | - Ó Ayo Martín
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, Spain
| | - T Segura Martín
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, Spain
| | - C González Mingot
- Servicio de Neurología, Hospital Universitario Arnau de Vilanova, Lleida, Spain
| | - M Baraldés Rovira
- Servicio de Neurología, Hospital Universitario Arnau de Vilanova, Lleida, Spain
| | - R Sivera Mascaró
- Servicio de Neurología, Hospital Francesc de Borja, Gandía, Spain
| | - E Cubo Delgado
- Servicio de Neurología, Hospital Universitario de Burgos, Burgos, Spain
| | | | - F Vázquez Sánchez
- Servicio de Neurología, Hospital Universitario de Burgos, Burgos, Spain
| | | | | | | | - C Labandeira Guerra
- Servicio de Neurología, Hospital Universitario Álvaro Cunqueiro, Vigo, Spain
| | - B Alemany Perna
- Servicio de Neurología, Hospital Universitario Josep Trueta, Girona, Spain
| | - A Carvajal Hernández
- Servicio de Neurología, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | | | | | - N Caballol Pons
- Sección de Neurología, Hospital Moisés Broggi, Sant Joan Despí, Barcelona, Spain
| | - A Ávila Rivera
- Servicio de Neurología, Hospital General L´Hospitalet, Barcelona, Spain
| | | | - R Lobato Rodríguez
- Sección de Neurología, Hospital Universitario Infanta Sofía, Madrid, Spain
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4
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Ortega Suero G, Abenza Abildúa MJ, Serrano Munuera C, Rouco Axpe I, Arpa Gutiérrez FJ, Adarmes Gómez AD, Rodríguez de Rivera FJ, Quintans Castro B, Posada Rodríguez I, Vadillo Bermejo A, Domingo Santos Á, Blanco Vicente E, Infante Ceberio I, Pardo Fernández J, Costa Arpín E, Painous Martí C, Muñoz JE, Mir Rivera P, Montón Álvarez F, Bataller Alberola L, Gascón Bayarri J, Casasnovas Pons C, Vélez Santamaría V, López Munain A, Fernández García Eulate G, Gazulla Abío J, Sanz Gallego I, Rojas Bartolomé L, Ayo Martín Ó, Segura Martín T, González Mingot C, Baraldés Rovira M, Sivera Mascaró R, Cubo Delgado E, Echevarría Íñiguez A, Vázquez Sánchez F, Bártulos Iglesias M, Casadevall Codina MT, Martínez Fernández EM, Labandeira Guerra C, Alemany Perna B, Carvajal Hernández A, Fernández Moreno C, Palacín Larroy M, Caballol Pons N, Ávila Rivera A, Navacerrada Barrero FJ, Lobato Rodríguez R, Sobrido Gómez MJ. Epidemiology of ataxia and hereditary spastic paraplegia in Spain: a cross-sectional study. Neurologia 2021; 38:S0213-4853(21)00021-9. [PMID: 33775475 DOI: 10.1016/j.nrl.2021.01.006] [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: 08/17/2020] [Accepted: 01/01/2021] [Indexed: 10/21/2022] Open
Abstract
INTRODUCTION Ataxia and hereditary spastic paraplegia are rare neurodegenerative syndromes. We aimed to determine the prevalence of these disorders in Spain in 2019. PATIENTS AND METHODS We conducted a cross-sectional, multicentre, retrospective, descriptive study of patients with ataxia and hereditary spastic paraplegia in Spain between March 2018 and December 2019. RESULTS We gathered data from a total of 1.809 patients from 11 autonomous communities, provided by 47 neurologists or geneticists. Mean (SD) age in our sample was 53.64 (20.51) years; 920 patients were men (50.8%) and 889 were women (49.2%). The genetic defect was unidentified in 920 patients (47.6%). A total of 1371 patients (70.9%) had ataxia and 562 (29.1%) had hereditary spastic paraplegia. Prevalence rates for ataxia and hereditary spastic paraplegia were estimated at 5.48 and 2.24 cases per 100 000 population, respectively. The most frequent type of dominant ataxia in our sample was SCA3, and the most frequent recessive ataxia was Friedreich ataxia. The most frequent type of dominant hereditary spastic paraplegia in our sample was SPG4, and the most frequent recessive type was SPG7. CONCLUSIONS In our sample, the estimated prevalence of ataxia and hereditary spastic paraplegia was 7.73 cases per 100 000 population. This rate is similar to those reported for other countries. Genetic diagnosis was not available in 47.6% of cases. Despite these limitations, our study provides useful data for estimating the necessary healthcare resources for these patients, raising awareness of these diseases, determining the most frequent causal mutations for local screening programmes, and promoting the development of clinical trials.
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Affiliation(s)
- G Ortega Suero
- Servicio de Neurología, Hospital Alcázar de San Juan, Complejo La Mancha-Centro, Ciudad Real, España
| | - M J Abenza Abildúa
- Servicio de Neurología, Hospital Universitario Infanta Sofía, Madrid, España.
| | - C Serrano Munuera
- Servicio de Neurología, Hospital Sant Joan de Déu, Martorell, España
| | - I Rouco Axpe
- Servicio de Neurología, Hospital Universitario de Cruces, Bilbao, España
| | - F J Arpa Gutiérrez
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Asesoría Docente de Neurología, Hospital Clínico San Carlos, Madrid, España
| | - A D Adarmes Gómez
- Servicio de Neurología, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - F J Rodríguez de Rivera
- Servicio de Neurología, Hospital Universitario La Paz-Carlos III-Cantoblanco, Madrid, España
| | - B Quintans Castro
- Fundación Pública Galega de Medicina Xenómica, Santiago de Compostela, España
| | - I Posada Rodríguez
- Servicio de Neurología, Hospital Universitario 12 de Octubre, Madrid, España
| | - A Vadillo Bermejo
- Servicio de Neurología, Hospital Universitario Mancha Centro, Ciudad Real, España
| | - Á Domingo Santos
- Servicio de Neurología, Hospital G. Tomelloso, Ciudad Real, España
| | - E Blanco Vicente
- Servicio de Neurología, Hospital Villarrobledo, Albacete, España
| | - I Infante Ceberio
- Servicio de Neurología, Hospital Universitario Marqués de Valdecilla, Cantabria, España
| | - J Pardo Fernández
- Servicio de Neurología, Hospital Clínico Santiago de Compostela, Galicia, España
| | - E Costa Arpín
- Servicio de Neurología, Hospital Clínico Santiago de Compostela, Galicia, España
| | - C Painous Martí
- Servicio de Neurología, Unidad de Neurogenética, Hospital Universitario Clinic, Barcelona, España
| | - J E Muñoz
- Servicio de Neurología, Unidad de Neurogenética, Hospital Universitario Clinic, Barcelona, España
| | - P Mir Rivera
- Servicio de Neurología, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - F Montón Álvarez
- Servicio de Neurología, Hospital Nuestra señora de Candelaria, Tenerife, España
| | | | - J Gascón Bayarri
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, España
| | - C Casasnovas Pons
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, España
| | - V Vélez Santamaría
- Servicio de Neurología, Hospital Universitario Bellvitge, Barcelona, España
| | - A López Munain
- Servicio de Neurología, Hospital Universitario Donostia, San Sebastián, España
| | | | - J Gazulla Abío
- Servicio de Neurología, Hospital Universitario Miguel Servet, Zaragoza, España
| | - I Sanz Gallego
- Servicio de Neurología, Hospital Universitario Sonsoles, Ávila, España
| | - L Rojas Bartolomé
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, España
| | - Ó Ayo Martín
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, España
| | - T Segura Martín
- Servicio de Neurología, Hospital Universitario de Albacete, Albacete, España
| | - C González Mingot
- Servicio de Neurología, Hospital Universitario Arnau de Vilanova, Lleida, España
| | - M Baraldés Rovira
- Servicio de Neurología, Hospital Universitario Arnau de Vilanova, Lleida, España
| | - R Sivera Mascaró
- Servicio de Neurología, Hospital Francesc de Borja, Gandía, España
| | - E Cubo Delgado
- Servicio de Neurología, Hospital Universitario de Burgos, Burgos, España
| | | | - F Vázquez Sánchez
- Servicio de Neurología, Hospital Universitario de Burgos, Burgos, España
| | | | | | | | - C Labandeira Guerra
- Servicio de Neurología, Hospital Universitario Álvaro Cunqueiro, Vigo, España
| | - B Alemany Perna
- Servicio de Neurología, Hospital Universitario Josep Trueta, Girona, España
| | - A Carvajal Hernández
- Servicio de Neurología, Hospital Universitario Virgen de las Nieves, Granada, España
| | | | | | - N Caballol Pons
- Sección de Neurología, Hospital Moisés Broggi, Sant Joan Despí, Barcelona, España
| | - A Ávila Rivera
- Servicio de Neurología, Hospital General ĹHospitalet, Barcelona, España
| | | | - R Lobato Rodríguez
- Sección de Neurología, Hospital Universitario Infanta Sofía, Madrid, España
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Lopes RG, Muñoz JE, Barros LM, Alves-Jr SL, Taborda CP, Stambuk BU. The secreted acid trehalase encoded by the CgATH1 gene is involved in Candida glabrata virulence. Mem Inst Oswaldo Cruz 2020; 115:e200401. [PMID: 33146242 PMCID: PMC7607559 DOI: 10.1590/0074-02760200401] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 10/05/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Candida glabrata yeast is the second cause of candidiasis worldwide. Differs from other yeasts since assimilates only glucose and trehalose (a characteristic used in rapid identification tests for this pathogen) by secreting into the medium a highly active acid trehalase encoded by the CgATH1 gene. OBJECTIVE This study aimed to characterise the function of the acid trehalase in the physiopathology of C. glabrata. METHODS Gene deletion was performed to obtain a mutant ath1Δ strain, and the ability of the ath1Δ strain to grow in trehalase, or the presence of trehalase activity in the ath1Δ yeast cells, was verified. We also tested the virulence of the ath1Δ strain in a murine model of infection. FINDINGS The ath1Δ mutant strain grows normally in the presence of glucose, but loses its ability to grow in trehalose. Due to the high acid trehalase activity present in wild-type cells, the cytoplasmic neutral trehalase activity is only detected in the ath1Δ strain. We also observed a significantly lower virulence of the ath1Δ strain in a murine model of infection with either normal or immunocompromised mice. MAIN CONCLUSIONS The acid trehalase is involved in the hydrolysis of external trehalose by C. glabrata, and the enzyme also plays a major virulence role during infectivity.
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Affiliation(s)
- Rafael G Lopes
- Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Departamento de Bioquímica, Florianópolis, SC, Brasil
| | - Julián E Muñoz
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, São Paulo, SP, Brasil.,Universidade de São Paulo, Faculdade de Medicina, Instituto de Medicina Tropical de São Paulo, Departamento de Dermatologia, Laboratório de Micologia Médica/LIM53, São Paulo, SP, Brasil.,Universidad del Rosario, Escuela de Medicina y Ciencias de la Salud, Bogotá, Colombia
| | - Ludmila M Barros
- Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Departamento de Bioquímica, Florianópolis, SC, Brasil
| | - Sergio L Alves-Jr
- Universidade Federal da Fronteira Sul, Laboratório de Bioquímica e Genética, Chapecó, SC, Brasil
| | - Carlos P Taborda
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, São Paulo, SP, Brasil.,Universidade de São Paulo, Faculdade de Medicina, Instituto de Medicina Tropical de São Paulo, Departamento de Dermatologia, Laboratório de Micologia Médica/LIM53, São Paulo, SP, Brasil
| | - Boris U Stambuk
- Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Departamento de Bioquímica, Florianópolis, SC, Brasil
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6
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Muñoz JE, Ramirez LM, Dias LDS, Rivas LA, Ramos LS, Santos ALS, Taborda CP, Parra-Giraldo CM. Pathogenicity Levels of Colombian Strains of Candida auris and Brazilian Strains of Candida haemulonii Species Complex in Both Murine and Galleria mellonella Experimental Models. J Fungi (Basel) 2020; 6:jof6030104. [PMID: 32664191 PMCID: PMC7558079 DOI: 10.3390/jof6030104] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/09/2020] [Revised: 07/04/2020] [Accepted: 07/05/2020] [Indexed: 02/07/2023] Open
Abstract
Candida auris and Candida haemulonii complex (C. haemulonii, C. haemulonii var. vulnera and C. duobushaemulonii) are phylogenetically related species that share some physiological features and habits. In the present study, we compared the virulence of these yeast species using two different experimental models: (i) Galleria mellonella larvae to evaluate the survival rate, fungal burden, histopathology and phagocytosis index and (ii) BALB/c mice to evaluate the survival. In addition, the fungal capacity to form biofilm over an inert surface was analyzed. Our results showed that in both experimental models, the animal survival rate was lower when infected with C. auris strains than the C. haemulonii species complex. The hemocytes of G. mellonella showed a significantly reduced ability to phagocytize the most virulent strains forming the C. haemulonii species complex. Interestingly, for C. auris, it was impossible to measure the phagocytosis index due to a general lysis of the hemocytes. Moreover, it was observed a greater capability of biofilm formation by C. auris compared to C. haemulonii species complex. In conclusion, we observed that C. auris and C. haemulonii complex have different levels of pathogenicity in the experimental models employed in the present study.
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Affiliation(s)
- Julián E. Muñoz
- MICROS Group, Medicine Traslacional Institute, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, D.C. 111221, Colombia;
| | - Laura M. Ramirez
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C. 110231, Colombia; (L.M.R.); (L.A.R.)
| | - Lucas dos Santos Dias
- Department of Microbiology, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, SP 05508-060, Brazil; (L.d.S.D.); (C.P.T.)
| | - Laura A. Rivas
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C. 110231, Colombia; (L.M.R.); (L.A.R.)
| | - Lívia S. Ramos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes, Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, Brazil; (L.S.R.); (A.L.S.S.)
| | - André L. S. Santos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes, Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, Brazil; (L.S.R.); (A.L.S.S.)
| | - Carlos P. Taborda
- Department of Microbiology, Biomedical Sciences Institute, University of São Paulo (USP), São Paulo, SP 05508-060, Brazil; (L.d.S.D.); (C.P.T.)
- Laboratory of Medical Mycology-LIM53/IMTSP, University of São Paulo (USP), São Paulo, SP 05508-060, Brazil
| | - Claudia M. Parra-Giraldo
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C. 110231, Colombia; (L.M.R.); (L.A.R.)
- Correspondence: ; Tel.: +57-1-3208320 (ext. 4305)
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Silva LBR, Dias LS, Rittner GMG, Muñoz JE, Souza ACO, Nosanchuk JD, Travassos LR, Taborda CP. Dendritic Cells Primed with Paracoccidioides brasiliensis Peptide P10 Are Therapeutic in Immunosuppressed Mice with Paracoccidioidomycosis. Front Microbiol 2017; 8:1057. [PMID: 28659882 PMCID: PMC5469887 DOI: 10.3389/fmicb.2017.01057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 05/26/2017] [Indexed: 01/23/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is an endemic systemic mycosis in Latin America, with the highest prevalence in Brazil, Colombia, and Venezuela. Fungi of the Paracoccidioides genus are etiologic agents of the disease. The 15 amino acid peptide P10 is derived from gp43, the main diagnostic antigen of Paracoccidioides brasiliensis. We previously reported that P10-pulsed dendritic cells (DCs) induce a protective response against P. brasiliensis. Presently, dexamethasone-treated BALB/c mice were intratracheally infected with P. brasiliensis Pb18 to establish the therapeutic efficacy of P10-pulsed DCs. Immunosuppressed and infected animals that received DCs had a reduction in their fungal burden, and this result was most pronounced in mice receiving DCs primed with P10. The efficacy of therapeutic DCs was significantly augmented by concomitant treatment with trimethoprim-sulfamethoxazole. Additionally, primed-DCs with or without the antifungal drug induced a beneficial Th1-biased immune response and significantly reduced tissue damage. In conclusion, these studies with immunocompromised mice demonstrate that P10-pulsed DCs with or without concomitant antifungal drugs are potently effective in combating invasive PCM. These findings support further translational studies to validate the use of P10-primed DCs for PCM in immunocompetent and immunosuppressed hosts.
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Affiliation(s)
- Leandro B R Silva
- Laboratory of Medical Mycology, Tropical Medicine Institute USP-LIM53, University of São PauloSão Paulo, Brazil
| | - Lucas S Dias
- Department of Microbiology, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
| | - Glauce M G Rittner
- Department of Microbiology, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
| | - Julián E Muñoz
- Department of Microbiology, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
| | - Ana C O Souza
- Department of Microbiology, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
| | - Joshua D Nosanchuk
- Department of Medicine, Albert Einstein College of Medicine, BronxNY, United States.,Department of Microbiology and Immunology, Albert Einstein College of Medicine, BronxNY, United States
| | - Luiz R Travassos
- Department of Microbiology, Immunology and Parasitology, Federal University of São PauloSão Paulo, Brazil
| | - Carlos P Taborda
- Laboratory of Medical Mycology, Tropical Medicine Institute USP-LIM53, University of São PauloSão Paulo, Brazil.,Department of Microbiology, Institute of Biomedical Sciences, University of São PauloSão Paulo, Brazil
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Muñoz JE, Luft VD, Amorim J, Magalhães A, Thomaz L, Nosanchuk JD, Travassos LR, Taborda CP. Immunization with P10 peptide increases specific immunity and protects immunosuppressed BALB/c mice infected with virulent yeasts of Paracoccidioides brasiliensis. Mycopathologia 2014; 178:177-88. [PMID: 25135302 DOI: 10.1007/s11046-014-9801-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 08/07/2014] [Indexed: 11/29/2022]
Abstract
Paracoccidioidomycosis is a systemic granulomatous disease caused by Paracoccidioides spp. A peptide from the major diagnostic antigen gp43, named P10, induces a T-CD4(+) helper-1 immune response in mice and protects against intratracheal challenge with virulent P. brasiliensis. Previously, we evaluated the efficacy of the P10 peptide alone or combined with antifungal drugs in mice immunosuppressed and infected with virulent isolate of P. brasiliensis. In the present work, our data suggest that P10 immunization leads to an effective cellular immune response associated with an enhanced T cell proliferative response. P10-stimulated splenocytes increased nitric oxide (NO) production and induced high levels of IFN-γ, IL-1β and IL-12. Furthermore, significantly increased concentrations of pro-inflammatory cytokines were also observed in lung homogenates of immunized mice. P10 immunization was followed by minimal fibrosis in response to infection. Combined with antifungal drugs, P10 immunization most significantly improved survival of anergic infected mice. Administration of either itraconazole or sulfamethoxazole/trimethoprim together with P10 immunization resulted in 100 % survival up to 200 days post-infection, whereas untreated mice died within 80 days. Hence, our data show that P10 immunization promotes a strong specific immune response even in immunocompromised hosts and thus P10 treatment represents a powerful adjuvant therapy to chemotherapy.
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Affiliation(s)
- Julián E Muñoz
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 1374, São Paulo, SP, 05008-900, Brazil
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9
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Rittner GMG, Muñoz JE, Marques AF, Nosanchuk JD, Taborda CP, Travassos LR. Therapeutic DNA vaccine encoding peptide P10 against experimental paracoccidioidomycosis. PLoS Negl Trop Dis 2012; 6:e1519. [PMID: 22389734 PMCID: PMC3289603 DOI: 10.1371/journal.pntd.0001519] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [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: 04/08/2011] [Accepted: 12/23/2011] [Indexed: 11/18/2022] Open
Abstract
Paracoccidioidomycosis (PCM), caused by Paracoccidioides brasiliensis, is the most prevalent invasive fungal disease in South America. Systemic mycoses are the 10th most common cause of death among infectious diseases in Brazil and PCM is responsible for more than 50% of deaths due to fungal infections. PCM is typically treated with sulfonamides, amphotericin B or azoles, although complete eradication of the fungus may not occur and relapsing disease is frequently reported. A 15-mer peptide from the major diagnostic antigen gp43, named P10, can induce a strong T-CD4+ helper-1 immune response in mice. The TEPITOPE algorithm and experimental data have confirmed that most HLA-DR molecules can present P10, which suggests that P10 is a candidate antigen for a PCM vaccine. In the current work, the therapeutic efficacy of plasmid immunization with P10 and/or IL-12 inserts was tested in murine models of PCM. When given prior to or after infection with P. brasiliensis virulent Pb 18 isolate, plasmid-vaccination with P10 and/or IL-12 inserts successfully reduced the fungal burden in lungs of infected mice. In fact, intramuscular administration of a combination of plasmids expressing P10 and IL-12 given weekly for one month, followed by single injections every month for 3 months restored normal lung architecture and eradicated the fungus in mice that were infected one month prior to treatment. The data indicate that immunization with these plasmids is a powerful procedure for prevention and treatment of experimental PCM, with the perspective of being also effective in human patients. Paracoccidioidomycosis (PCM) is the predominant systemic mycosis in Latin America causing half of the total deaths among systemic fungal infectious diseases in Brazil. Chemotherapy is the standard treatment, but the long time required, severe cases of immunosuppression and frequent relapses indicate that additional methods should be introduced such as immunotherapy combined with antifungal drugs. Previously, the protective activity of P10, a peptide derived from the major diagnostic antigen gp43, was demonstrated, alone or combined with chemotherapy. P10 elicited a vigorous IFN-γ mediated Th-1 immune response. Presently, the reduction of fungal load, and even sterilization, was attempted using a specific DNA vaccine encoding P10. Plasmid pcDNA3 expression vector with P10 insert was tested as a vaccine in intratracheally infected BALB/c and B10.A mice. Our results showed that vaccination with pP10 induced a significant reduction of the fungal burden in the lung. Co-vaccination of pP10 with a plasmid encoding mouse IL-12 proved to be even more effective in the elimination of the fungus with virtual sterilization in a long term infection and treatment assay system. The data suggest that immunization with these plasmids, without the need of an adjuvant, could be used in the prevention and treatment of PCM in human patients.
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Affiliation(s)
- Glauce M. G. Rittner
- Institute of Biomedical Sciences, Department of Microbiology, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Julián E. Muñoz
- Institute of Biomedical Sciences, Department of Microbiology, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Alexandre F. Marques
- Institute of Biomedical Sciences, Department of Microbiology, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Joshua D. Nosanchuk
- Departments of Medicine, and Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Carlos P. Taborda
- Institute of Biomedical Sciences, Department of Microbiology, University of São Paulo, São Paulo, São Paulo, Brazil
- Medical Mycology Laboratory-IMTSP and LIM53/HCFMUSP, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Luiz R. Travassos
- Cell Biology Division, Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
- * E-mail:
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10
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Delgado JV, Martínez AM, Acosta A, Alvarez LA, Armstrong E, Camacho E, Cañón J, Cortés O, Dunner S, Landi V, Marques JR, Martín-Burriel I, Martínez OR, Martínez RD, Melucci L, Muñoz JE, Penedo MCT, Postiglioni A, Quiróz J, Rodellar C, Sponenberg P, Uffo O, Ulloa-Arvizu R, Vega-Pla JL, Villalobos A, Zambrano D, Zaragoza P, Gama LT, Ginja C. Genetic characterization of Latin-American Creole cattle using microsatellite markers. Anim Genet 2011; 43:2-10. [PMID: 22221019 DOI: 10.1111/j.1365-2052.2011.02207.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Genetic diversity in and relationships among 26 Creole cattle breeds from 10 American countries were assessed using 19 microsatellites. Heterozygosities, F-statistics estimates, genetic distances, multivariate analyses and assignment tests were performed. The levels of within-breed diversity detected in Creole cattle were considerable and higher than those previously reported for European breeds, but similar to those found in other Latin American breeds. Differences among breeds accounted for 8.4% of the total genetic variability. Most breeds clustered separately when the number of pre-defined populations was 21 (the most probable K value), with the exception of some closely related breeds that shared the same cluster and others that were admixed. Despite the high genetic diversity detected, significant inbreeding was also observed within some breeds, and heterozygote excess was detected in others. These results indicate that Creoles represent important reservoirs of cattle genetic diversity and that appropriate conservation measures should be implemented for these native breeds in order to minimize inbreeding and uncontrolled crossbreeding.
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Affiliation(s)
- J V Delgado
- Departamento de Genética, Universidad de Córdoba, Campus Rabanales Edificio Gregor Mendel, Córdoba, Spain
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11
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Amaral AC, Marques AF, Muñoz JE, Bocca AL, Simioni AR, Tedesco AC, Morais PC, Travassos LR, Taborda CP, Felipe MSS. Poly(lactic acid-glycolic acid) nanoparticles markedly improve immunological protection provided by peptide P10 against murine paracoccidioidomycosis. Br J Pharmacol 2010; 159:1126-32. [PMID: 20136827 DOI: 10.1111/j.1476-5381.2009.00617.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE The present study reports on the preparation and testing of a sustained delivery system for the immunomodulatory peptide P10 aimed at reducing the in vivo degradation of the peptide and the amount required to elicit a protective immune response against paracoccidioidomycosis. EXPERIMENTAL APPROACH BALB/c mice were infected with the yeast Paracoccidioides brasiliensis to mimic the chronic form of paracoccidioidomycosis. The animals were treated daily with sulfamethoxazole/trimethoprim alone or combined with peptide P10, either emulsified in Freund's adjuvant or entrapped in poly(lactic acid-glycolic acid) (PLGA) nanoparticles at different concentrations (1 microg, 5 microg, 10 microg, 20 microg or 40 microg.50 microL(-1)). Therapeutic efficacy was assessed as fungal burden in tissues and the immune response by quantitative determination of cytokines. KEY RESULTS Animals given combined chemotherapy and P10 nanotherapy presented a marked reduction of fungal load in the lungs, compared with the non-treated animals. After 30 days of treatment, P10 entrapped within PLGA (1 microg.50 microL(-1)) was more effective than 'free' P10 emulsified in Freund's adjuvant (20 microg.50 microL(-1)), as an adjuvant to chemotherapy. After treatment for 90 days, the higher doses of P10 entrapped within PLGA (5 or 10 microg.50 microL(-1)) were most effective. Treatment with P10 emulsified in Freund's adjuvant (20 microg.50 microL(-1)) or P10 entrapped within PLGA (1 microg.50 microL(-1)) were accompanied by high levels of interferon-gamma in lung. CONCLUSIONS AND IMPLICATIONS Combination of sulfamethoxazole/trimethoprim with the P10 peptide entrapped within PLGA demonstrated increased therapeutic efficacy against paracoccidioidomycosis. P10 incorporation into PLGA nanoparticles dramatically reduced the peptide amount necessary to elicit a protective effect.
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Affiliation(s)
- André C Amaral
- Biological Sciences Institute, Universidade de Brasília, Brasília
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12
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Valls-Solé J, Muñoz JE, Valldeoriola F. Abnormalities of prepulse inhibition do not depend on blink reflex excitability: a study in Parkinson's disease and Huntington's disease. Clin Neurophysiol 2004; 115:1527-36. [PMID: 15203054 DOI: 10.1016/j.clinph.2004.02.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2004] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Prepulse inhibition of the blink reflex is a robust phenomenon with an interesting physiology and a large potential for clinical applicability. In the study presented here we investigated whether the blink reflex inhibition by a prepulse (BRIP) is influenced by the blink reflex excitability recovery (BRER). METHODS The study was undertaken in 20 patients with Parkinson's disease (PD), 20 patients with Huntington's disease (HD) and 20 healthy volunteers. BRER was determined by measuring the size of the response to a test supraorbital nerve stimulus as a percentage of the response to a conditioning stimulus at inter-stimuli intervals of 100-1000 ms. BRIP was determined as the percentage reduction induced in the response to a supraorbital nerve stimulus by either a low intensity auditory click or a weak third finger somatosensory stimulus, applied with a leading interval of 50-110 ms. RESULTS There was a negative correlation between the percentage BRER and the percentage BRIP (Pearson's correlation coefficient of -0.37). BRER was enhanced in 14 PD patients (70%) and 6 HD patients (30%), while it was depressed in 10 HD patients (50%). BRIP was significantly reduced in 15 PD patients (75%) and 16 HD patients (80%). No significant correlation was found between abnormally enhanced BRER and abnormally reduced BRIP in all patients as a group (chi(2)=2.4;P=0.11). A weak correlation was found in PD patients (P=0.019) and no correlation was observed in HD patients (P=0.8). CONCLUSIONS Our results indicate that an abnormally reduced BRIP was not always accompanied by an abnormally enhanced BRER in patients with HD. The two tests likely assess specific and distinct brainstem functions, and provide different types of information. While BRIP may be the result of a widespread integrative processing of sensory stimuli, BRER likely reflects the excitability of a chain of brainstem inter-neurons. SIGNIFICANCE BRER and BRIP provide independent information on the state of functionally separate circuits that converge on trigemino-facial brainstem inter-neurons.
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Affiliation(s)
- J Valls-Solé
- Unitat d'EMG, Servei de Neurologia, Institut d'Investigació Biomèdica August Pi i Sunyer, Hospital Clínic, Universitat de Barcelona, Villarroel, 170, Barcelona 08017, Spain.
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13
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Muñoz JE, Marín C, Tolosa E. SCH 23390-induced behavioral supersensitivity is not related to striatal c-fos levels. Brain Res 1997; 774:51-4. [PMID: 9452191 DOI: 10.1016/s0006-8993(97)81686-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Stereotyped behavior and striatal c-fos levels induced by chronic treatment with the D1 dopamine antagonist SCH 23390 have been investigated in rats which received subsequent subacute dopamine agonist treatment. SCH 23390 treatment (0.5 mg/kg/day) for 21 days increased both apomorphine-induced orofacial stereotypies and striatal c-fos levels. Treatment with the D1 dopamine agonist SKF 38393 (10 mg/kg/day) and the combination of SKF 38393 with the D2 dopamine agonist quinpirole (1 mg/kg/day), for 5 consecutive days, attenuated apomorphine-induced stereotypies without changing c-fos levels in rats previously treated with SCH 23390. These findings suggest that SCH 23390-induced behavioral supersensitivity and the increased striatal c-fos levels are concomitant but unrelated phenomena.
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Affiliation(s)
- J E Muñoz
- Universitat de Barcelona, Departament de Medicina, Hospital Clínic i Provincial de Barcelona, Spain
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Valldeoriola F, Valls-Solé J, Tolosa E, Nobbe FA, Muñoz JE, Martí J. The acoustic startle response is normal in patients with multiple system atrophy. Mov Disord 1997; 12:697-700. [PMID: 9380050 DOI: 10.1002/mds.870120511] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We investigated the acoustic startle response in eight patients with MSA and compared the results with those from a group of age matched healthy subjects. Onset latency and amplitude of the responses obtained in the orbicularis oculi, masseter and sternocleidomastoid muscles were not different in patients and control subjects. We conclude that, in spite of the pathological derangement described in brainstem reticular nuclei in MSA, the neuronal circuits mediating the auditory startle reflex are functionally preserved.
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Affiliation(s)
- F Valldeoriola
- Departament de Medicina Hospital Clínic Universitat de Barcelona, Spain
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15
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Bataller R, Salmerón JM, Muñoz JE, Obach V, Elizalde JI, Mas A, Tolosa E, Terés J. [Pyloric stenosis complicated by Wernicke-Korsakoff syndrome]. Gastroenterol Hepatol 1997; 20:131-3. [PMID: 9162533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Wernicke-Korsakoff syndrome (WKS) is a picture of oculomotor alterations, ataxia and confusion presented in chronic alcoholics. It has more rarely been described in non alcoholic patients with malnutrition. The case of a patient with ulcerous peptic disease of long evolution who consulted for a picture compatible with WKS following clinical manifestations of repeated vomiting secondary to complete pyloric stenosis is presented. The peculiarity of the picture and the convenience of prevention in malnourished patients receiving intravenous glucose sera is discussed.
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Affiliation(s)
- R Bataller
- Hospital Clinic i Provincial, Departament de Medicina, Universitat de Barcelona
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16
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Saiz A, Vila N, Muñoz JE, Martí MJ, Graus F, Tolosa E. [Wolfram's syndrome: correlation of clinical signs and neurological images]. Neurologia 1995; 10:107-9. [PMID: 7695938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Wolfram's syndrome is defined by the association of diabetes mellitus, diabetes insipidus, optic atrophy and nerve deafness. Other neurological anomalies, such as ataxia, nystagmus, tonic pupil, dizziness, dysarthria, dysphagia and epilepsy are rarely described and tend to appear later than the primary manifestations. We describe a patient with Wolfram's syndrome whose magnetic resonance image (MRI) of the head showed brainstem and cerebellar atrophy years before the appearance of clinical signs of brainstem disfunction. We conclude that alterations in MRI precede neurological symptoms by several years in Wolfram's syndrome.
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Affiliation(s)
- A Saiz
- Servicio de Neurología, Hospital Clínic i Provincial, Barcelona
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17
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Muñoz JE, Viñolas N, Castro J, Graus F, Conde C, Castel T, Biete A, Tolosa E, Estapé J. [Cerebral metastasis of melanoma: study of 48 patients]. Med Clin (Barc) 1993; 101:684-7. [PMID: 8114524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Malignant melanoma is a frequent cause of cerebral metastases (CM). In the present study the characteristics of primitive melanomas of patients with CM, their forms of clinical presentation and treatment were analyzed. METHODS A retrospective study of the patients with melanoma and CM diagnosed between 1982 and 1991 was carried out. RESULTS Out of 786 patients with melanoma 48 were identified with CM. In 65% of the melanoma originated in cutaneous areas BANS (of bad prognosis). The median thickness of the tumor (Breslow's index) was of 3.6 mm. The median period of latency between diagnosis of the melanoma and the detection of CM was 22 months. Although recent hemorrhage of the CM was observed in the cranial computerized tomography in 20 of the 48 patients, only 7 presented clinical symptoms of ictus. In 23 patients the CM were the only evidence of metastases of the melanoma. The median survival was one month in the patients treated with only dexamethasone, 3.5 months in the chemotherapy group, 2.5 months for the group given radiotherapy and 6 months for those undergoing surgery. CONCLUSIONS Most of the patients with cerebral metastasis had a primitive melanoma with criteria of bad prognosis. The presence of hemorrhage in computerized tomography did not always correlate with clinical symptoms of ictus. Surgical treatment must be considered in patient with sole cerebral metastasis without evidence of distant disease.
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Affiliation(s)
- J E Muñoz
- Servicio de Neurología, Hospital Clínic i Provincial, Barcelona
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18
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Abstract
Two patients with postpolio syndrome are presented. The first case developed mild Parkinson's syndrome, for which she was treated with a levodopa/carbidopa combination followed by the institution of deprenyl. An unexpected improvement in the symptoms of postpolio syndrome was noted. The second patient who was unaffected by Parkinson's syndrome was started on deprenyl alone and reported a similar improvement in symptomatology.
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Affiliation(s)
- C R Bamford
- Department of Neurology, University of Arizona, Tucson 85724
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19
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García Gallego F, Carratalá J, Frutos A, Gamallo C, Mesa JM, Muñoz JE. [Rupture of the mitral posteromedial papillary muscle associated with myxomatous mitral valve]. Rev Esp Cardiol 1989; 42:693-6. [PMID: 2623303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report a 52 year old man, who without previous thoracic trauma, cardiac diseases or cardiovascular risk factors presented after mild epigastric discomfort acute pulmonary oedema. He did not present clinical, electrocardiographic and biochemical manifestation of acute myocardial infarction. He was hospitalized and 15 days later he was sent to our hospital intubated and with assisted respiration. Haemodynamic studies showed severe acute mitral regurgitation and absence of significant obstructing lesions in the coronaries arteries. He was operated few hours after admission. The surgeon found a dysplasic mitral valve and rupture of a head of the posteromedial papillary muscle. The anatomopathological studies discovered mitral myxoid degeneration and ischemic lesion of the papillary muscle. We review the literature of the exclusive infarction of the papillary muscles and their possible relationships with the mitral prolapse syndrome.
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Oliver JM, López de Sá E, Dominguez F, Sobrino JA, Muñoz JE, Iglesias A. Congenital right coronary artery-to-left atrium fistula detected by two-dimensional and Doppler echocardiography. Am Heart J 1987; 114:165-6. [PMID: 3604858 DOI: 10.1016/0002-8703(87)90322-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Plaza I, Oliver JM, Sotillo JF, Muñoz JE, Sobrino JA. [Bloodless determination of telesystolic stress of the left ventricle. Comparison with echohemodynamic and angiohemodynamic methods]. Rev Esp Cardiol 1984; 37:3-9. [PMID: 6739922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Iglesias A, Oliver J, Muñoz JE, Nuñez L. Quadricuspid aortic valve associated with fibromuscular subaortic stenosis and aortic regurgitation treated by conservative surgery. Chest 1981; 80:327-8. [PMID: 7196827 DOI: 10.1378/chest.80.3.327] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
A case of subaortic fibromuscular stenosis associated with a quadricuspid aortic valve with severe aortic insufficiency is reported. Correction of the anomaly was by resection of the subaortic stenosis and aortic valvuloplasty was performed with excellent clinical and hemodynamic results.
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Iglesias A, Aguado MG, Oliver J, Sotillo J, Muñoz JE, Artero G, Nuñez L. Surgical treatment of annulo aortic ectasia. Experience in eight consecutive patients. J Cardiovasc Surg (Torino) 1980; 21:681-6. [PMID: 7007393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Eight patients with ectasia of the aortic annulus due to cystic degeneration of the media are presented. All patients were operated with a technique similar to the one described by Bentall and De Bono. Six patients had the aortic valve replaced by a bioprosthesis and two patients with a St. Jude Medical Valve Prosthesis. Manoeuvers to avoid anastomotic tension, adequate myocardial protection, and a careful control of postbypass blood pressure are described. There was no early or late mortality. Patients have been followed for a mean period of twelve months. Seven patients are in grade I of the N.Y.H.A., and one in grade II. Five patients studied postoperatively with cardiac catheterization and angiography showed normal ventricular function, normal prosthetic function and no aneurysm or pseudoaneurysm in any of the suture lines and with a good coronary anatomy.
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Sobrino JA, Mate I, Muñoz JE, Sobrino N. Disappearance of right bundle branch block with left anterior hemiblock when associated with a type B pre-excitation syndrome. Am Heart J 1974; 87:497-500. [PMID: 4817107 DOI: 10.1016/0002-8703(74)90175-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Muñoz JE, Lufschanowski R, Leachman RD. [Clinical significance of coronary collateral circulation]. Rev Esp Cardiol 1973; 26:25-34. [PMID: 4712336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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