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Campillo-Balderas JA, Lazcano A, Cottom-Salas W, Jácome R, Becerra A. Pangenomic Analysis of Nucleo-Cytoplasmic Large DNA Viruses. I: The Phylogenetic Distribution of Conserved Oxygen-Dependent Enzymes Reveals a Capture-Gene Process. J Mol Evol 2023; 91:647-668. [PMID: 37526693 PMCID: PMC10598087 DOI: 10.1007/s00239-023-10126-z] [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] [Received: 07/25/2022] [Accepted: 06/21/2023] [Indexed: 08/02/2023]
Abstract
The Nucleo-Cytoplasmic Large DNA Viruses (NCLDVs) infect a wide range of eukaryotic species, including amoeba, algae, fish, amphibia, arthropods, birds, and mammals. This group of viruses has linear or circular double-stranded DNA genomes whose size spans approximately one order of magnitude, from 100 to 2500 kbp. The ultimate origin of this peculiar group of viruses remains an open issue. Some have argued that NCLDVs' origin may lie in a bacteriophage ancestor that increased its genome size by subsequent recruitment of eukaryotic and bacterial genes. Others have suggested that NCLDVs families originated from cells that underwent an irreversible process of genome reduction. However, the hypothesis that a number of NCLDVs sequences have been recruited from the host genomes has been largely ignored. In the present work, we have performed pangenomic analyses of each of the seven known NCLDVs families. We show that these families' core- and shell genes have cellular homologs, supporting possible escaping-gene events as part of its evolution. Furthermore, the detection of sequences that belong to two protein families (small chain ribonucleotide reductase and Erv1/Air) and to one superfamily [2OG-Fe(II) oxygenases] that are for distribution in all NCLDVs core and shell clusters encoding for oxygen-dependent enzymes suggests that the highly conserved core these viruses originated after the Proterozoic Great Oxidation Event that transformed the terrestrial atmosphere 2.4-2.3 Ga ago.
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Affiliation(s)
- J A Campillo-Balderas
- Facultad de Ciencias, UNAM, Cd. Universitaria, Apdo. Postal 70-407, 04510, Mexico City, DF, Mexico
| | - A Lazcano
- Facultad de Ciencias, UNAM, Cd. Universitaria, Apdo. Postal 70-407, 04510, Mexico City, DF, Mexico
- El Colegio Nacional, Donceles 104, Centro Histórico, 06020, Mexico City, CP, Mexico
| | - W Cottom-Salas
- Facultad de Ciencias, UNAM, Cd. Universitaria, Apdo. Postal 70-407, 04510, Mexico City, DF, Mexico
- Escuela Nacional Preparatoria, Plantel 8 Miguel E. Schulz, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - R Jácome
- Facultad de Ciencias, UNAM, Cd. Universitaria, Apdo. Postal 70-407, 04510, Mexico City, DF, Mexico
| | - A Becerra
- Facultad de Ciencias, UNAM, Cd. Universitaria, Apdo. Postal 70-407, 04510, Mexico City, DF, Mexico.
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Becerra A, Iša P, Gutiérrez-Escolano AL, Velázquez FR, Torres J, Arias CF, Estrada-Garcia T. Differential virome composition and richness between children's diarrheagenic stools kept at ultra-low temperatures for long-term. J Infect Dev Ctries 2023; 17:93-101. [PMID: 36795932 DOI: 10.3855/jidc.17572] [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: 10/23/2022] [Accepted: 10/30/2022] [Indexed: 02/17/2023] Open
Abstract
INTRODUCTION Diarrhoeal illness is the second cause of morbidity/mortality among children from less-developed regions worldwide. Nonetheless, there is scarce information regarding their gut microbiome. AIM Microbiome characterization, with an emphasis on the virome, of children's stools with diarrhoea, by a commercial microbiome array. METHODOLOGY Nucleic acids extraction, optimised for viral identification, of stool samples from 20 Mexican children with diarrhoea (10 children < 2 and 10 ≥ 2-years-old), collected 16 years ago and kept at -70 °C, were analysed for the presence of viruses, bacteria, archaea, protozoa, and fungi species sequences. RESULTS Only viral and bacterial species sequences were identified among children's stools. Most stool samples harboured species belonging to the bacteriophages (95%), anellovirus (60%), diarrhoeagenic viruses (40%), and non-human pathogens viruses (45% avian virus and 40% plant viruses) groups. Among the children's stools, virome inter-individual species composition was observed, even in presence of illness. The < 2-years-old children group has significantly higher viral richness (p = 0.01), conferred mainly by bacteriophages and diarrheagenic-viruses (p = 0.01) species, in comparison with the ≥ 2-years-old group. CONCLUSIONS The virome of stools of children with diarrhoea revealed inter-individual viral species composition. Similarly, to the few virome studies in healthy young children, the bacteriophages group was the most abundant. A significantly higher viral richness, conferred by bacteriophages and diarrheagenic-viral species, was observed among < 2-years-old children in comparison with older children. Stools preserved at -70 °C for long term can successfully be used for microbiome studies.
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Affiliation(s)
- Adriana Becerra
- Department of Molecular Biomedicine, Centro de Investigación y de Estudios Avanzados del IPN. Ciudad de México. Mexico City. Mexico
| | - Pavel Iša
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Ana Lorena Gutiérrez-Escolano
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del IPN. Mexico City. Mexico
| | - Federico Raúl Velázquez
- Unidad de Investigación en Enfermedades Infecciosas, Unidad Médica de Alta Especialidad, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Ciudad de Mexico, Mexico
| | - Javier Torres
- Unidad de Investigación en Enfermedades Infecciosas, Unidad Médica de Alta Especialidad, Hospital de Pediatría, Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Ciudad de Mexico, Mexico
| | - Carlos Federico Arias
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Teresa Estrada-Garcia
- Department of Molecular Biomedicine, Centro de Investigación y de Estudios Avanzados del IPN. Ciudad de México. Mexico City. Mexico
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Guelbert G, Venier AC, Cismondi IA, Becerra A, Vazquez JC, Fernández EA, De Paul AL, Guelbert N, Noher I, Pesaola F. Neuronal ceroid lipofuscinosis in the South American-Caribbean region: An epidemiological overview. Front Neurol 2022; 13:920421. [PMID: 36034292 PMCID: PMC9412946 DOI: 10.3389/fneur.2022.920421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 07/22/2022] [Indexed: 11/13/2022] Open
Abstract
Neuronal ceroid lipofuscinoses (NCLs) comprise 13 hereditary neurodegenerative pathologies of very low frequency that affect individuals of all ages around the world. All NCLs share a set of symptoms that are similar to other diseases. The exhaustive collection of data from diverse sources (clinical, genetic, neurology, ophthalmology, etc.) would allow being able in the future to define this group with greater precision for a more efficient diagnostic and therapeutic approach. Despite the large amount of information worldwide, a detailed study of the characteristics of the NCLs in South America and the Caribbean region (SA&C) has not yet been done. Here, we aim to present and analyse the multidisciplinary evidence from all the SA&C with qualitative weighting and biostatistical evaluation of the casuistry. Seventy-one publications from seven countries were reviewed, and data from 261 individuals (including 44 individuals from the Cordoba cohort) were collected. Each NCL disease, as well as phenotypical and genetic data were described and discussed in the whole group. The CLN2, CLN6, and CLN3 disorders are the most frequent in the region. Eighty-seven percent of the individuals were 10 years old or less at the onset of symptoms. Seizures were the most common symptom, both at onset (51%) and throughout the disease course, followed by language (16%), motor (15%), and visual impairments (11%). Although symptoms were similar in all NCLs, some chronological differences could be observed. Sixty DNA variants were described, ranging from single nucleotide variants to large chromosomal deletions. The diagnostic odyssey was probably substantially decreased after medical education activities promoted by the pharmaceutical industry and parent organizations in some SA&C countries. There is a statistical deviation in the data probably due to the approval of the enzyme replacement therapy for CLN2 disease, which has led to a greater interest among the medical community for the early description of this pathology. As a general conclusion, it became clear in this work that the combined bibliographical/retrospective evaluation approach allowed a general overview of the multidisciplinary components and the epidemiological tendencies of NCLs in the SA&C region.
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Affiliation(s)
- Guillermo Guelbert
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Servicio de Enfermedades Metabólicas Hereditarias, Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
| | - Ana Clara Venier
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigación en Ciencias de la Salud, Consejo Nacional de Investigaciones Científicas y Técnicas, Córdoba, Argentina
| | - Ines Adriana Cismondi
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Adriana Becerra
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Servicio de Enfermedades Metabólicas Hereditarias, Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
| | - Juan Carlos Vazquez
- Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas, Universidad Católica de Córdoba, Consejo Nacional de Investigaciones Científicas y Técnicas, Córdoba, Argentina
| | - Elmer Andrés Fernández
- Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas, Universidad Católica de Córdoba, Consejo Nacional de Investigaciones Científicas y Técnicas, Córdoba, Argentina
| | - Ana Lucía De Paul
- Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigación en Ciencias de la Salud, Consejo Nacional de Investigaciones Científicas y Técnicas, Córdoba, Argentina
| | - Norberto Guelbert
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Servicio de Enfermedades Metabólicas Hereditarias, Clínica Universitaria “Reina Fabiola”, Córdoba, Argentina
| | - Ines Noher
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Universidad Nacional de Córdoba, Córdoba, Argentina
- *Correspondence: Ines Noher ;
| | - Favio Pesaola
- Programa de Investigación Translacional de Lipofuscinosis Ceroidea Neuronal (NCL Program), Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
- Department of Pediatrics, Washington University in Saint Louis School of Medicine, St. Louis, MO, United States
- Favio Pesaola ;
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Silvera-Ruiz SM, Gemperle C, Peano N, Olivero V, Becerra A, Häberle J, Gruppi A, Larovere LE, Motrich RD. Immune Alterations in a Patient With Hyperornithinemia-Hyperammonemia-Homocitrullinuria Syndrome: A Case Report. Front Immunol 2022; 13:861516. [PMID: 35711415 PMCID: PMC9196877 DOI: 10.3389/fimmu.2022.861516] [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: 01/24/2022] [Accepted: 05/02/2022] [Indexed: 11/13/2022] Open
Abstract
The hyperornithinemia-hyperammonemia-homocitrullinuria (HHH) syndrome is a rare autosomal recessive inborn error of the urea cycle caused by mutations in the SLC25A15 gene. Besides the well-known metabolic complications, patients often present intercurrent infections associated with acute hyperammonemia and metabolic decompensation. However, it is currently unknown whether intercurrent infections are associated with immunological alterations besides the known metabolic imbalances. Herein, we describe the case of a 3-years-old girl affected by the HHH syndrome caused by two novel SLC25A15 gene mutations associated with immune phenotypic and functional alterations. She was admitted to the hospital with an episode of recurrent otitis, somnolence, confusion, and lethargy. Laboratory tests revealed severe hyperammonemia, elevated serum levels of liver transaminases, hemostasis alterations, hyperglutaminemia and strikingly increased orotic aciduria. Noteworthy, serum protein electrophoresis showed a reduction in the gamma globulin fraction. Direct sequencing of the SLC25A15 gene revealed two heterozygous non-conservative substitutions in the exon 5: c.649G>A (p.Gly217Arg) and c.706A>G (p.Arg236Gly). In silico analysis indicated that both mutations significantly impair protein structure and function and are consistent with the patient clinical status confirming the diagnosis of HHH syndrome. In addition, the immune analysis revealed reduced levels of serum IgG and striking phenotypic and functional alterations in the T and B cell immune compartments. Our study has identified two non-previously described mutations in the SLC25A15 gene underlying the HHH syndrome. Moreover, we are reporting for the first time functional and phenotypic immunologic alterations in this rare inborn error of metabolism that would render the patient immunocompromised and might be related to the high frequency of intercurrent infections observed in patients bearing urea cycle disorders. Our results point out the importance of a comprehensive analysis to gain further insights into the underlying pathophysiology of the disease that would allow better patient care and quality of life.
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Affiliation(s)
- Silene M Silvera-Ruiz
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina.,Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Hospital de Niños de la Santísima Trinidad, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Corinne Gemperle
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Natalia Peano
- Fundación para el Progreso de la Medicina, Córdoba, Argentina
| | | | - Adriana Becerra
- División de Enfermedades Metabólicas, Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
| | - Johannes Häberle
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Adriana Gruppi
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Laura E Larovere
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Hospital de Niños de la Santísima Trinidad, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina.,Cátedra de Clínica Pediátrica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Ruben D Motrich
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Moran-Garcia N, Lopez-Saucedo C, Becerra A, Meza-Segura M, Hernandez-Cazares F, Guerrero-Baez J, Galindo-Gómez S, Tsutsumi V, Schnoor M, Méndez-Tenorio A, Nataro JP, Estrada-Garcia T. A Novel Adult Murine Model of Typical Enteroaggregative Escherichia coli Infection Reveals Microbiota Dysbiosis, Mucus Secretion, and AAF/II-Mediated Expression and Localization of β-Catenin and Expression of MUC1 in Ileum. Front Cell Infect Microbiol 2022; 12:885191. [PMID: 35706909 PMCID: PMC9190437 DOI: 10.3389/fcimb.2022.885191] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
Typical enteroaggregative Escherichia coli (tEAEC) is a diarrheagenic E. coli pathotype associated with pediatric and traveler’s diarrhea. Even without diarrhea, EAEC infections in children also lead to increased gut inflammation and growth shortfalls. EAEC strain’s defining phenotype is the aggregative adherence pattern on epithelial cells attributable to the aggregative adherence fimbriae (AAF). EAEC only causes diarrhea in humans; therefore, not much is known of the exact intestinal region of infection and damage or its interactions with intestinal enterocytes in vivo and in situ. This study aimed to develop a new tEAEC mouse model of infection, characterize the microbiota of infected mice, and evaluate in situ the expression of host adherence and surface molecules triggering EAEC infection and the role of the EAEC AAF-II in adherence. Six-week-old C57BL/6 mice, without previous antibiotic treatment, were orally challenged with EAEC 042 strain or EAEC 042 AAF-II mutant (ΔAAF/II) strain, or DAEC-MXR strain (diffusely adherent E. coli clinical isolate), and with saline solution (control group). Paraffin sections of the colon and ileum were stained with H&E and periodic acid-Schiff. ZO-1, β-catenin, MUC1, and bacteria were analyzed by immunofluorescence. EAEC-infected mice, in comparison with DAEC-MXR-infected and control mice, significantly lost weight during the first 3 days. After 7 days post-infection, mucus production was increased in the colon and ileum, ZO-1 localization remained unaltered, and morphological alterations were more pronounced in the ileum since increased expression and apical localization of β-catenin in ileal enterocytes were observed. EAEC-infected mice developed dysbiosis 21 days post-infection. At 4 days post-infection, EAEC strain 042 formed a biofilm on ileal villi and increased the expression and apical localization of β-catenin in ileal enterocytes; these effects were not seen in animals infected with the 042 ΔAAF/II strain. At 3 days post-infection, MUC1 expression on ileal enterocytes was mainly detectable among infected mice and colocalized with 042 strains on the enterocyte surface. We developed a novel mouse model of EAEC infection, which mimics human infection, not an illness, revealing that EAEC 042 exerts its pathogenic effects in the mouse ileum and causes dysbiosis. This model is a unique tool to unveil early molecular mechanisms of EAEC infection in vivo and in situ.
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Affiliation(s)
| | | | - Adriana Becerra
- Department of Molecular Biomedicine, CINVESTAV-IPN, Mexico City, Mexico
| | - Mario Meza-Segura
- Department of Molecular Biomedicine, CINVESTAV-IPN, Mexico City, Mexico
| | | | | | - Silvia Galindo-Gómez
- Department of Infectomics and Molecular Pathogenesis, CINVESTAV-IPN, Mexico City, Mexico
| | - Víctor Tsutsumi
- Department of Infectomics and Molecular Pathogenesis, CINVESTAV-IPN, Mexico City, Mexico
| | - Michael Schnoor
- Department of Molecular Biomedicine, CINVESTAV-IPN, Mexico City, Mexico
| | - Alfonso Méndez-Tenorio
- Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - James P. Nataro
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Teresa Estrada-Garcia
- Department of Molecular Biomedicine, CINVESTAV-IPN, Mexico City, Mexico
- *Correspondence: Teresa Estrada-Garcia,
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Laróvere LE, Fairbanks LD, Jinnah HA, Guelbert NB, Escuredo E, Becerra A, Kremer RDD. Lesch-Nyhan Disease and Its Variants: Phenotypic and Mutation Spectrum of Hypoxanthine-Guanine Phosphoribosyltransferase Deficiency in Argentine Patients. J inborn errors metab screen 2021. [DOI: 10.1590/2326-4594-jiems-2020-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Laura E. Laróvere
- Universidad Nacional de Córdoba, Argentina; Consejo de Investigaciones Científicas y Tecnológicas, Argentina
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Pesaola F, Guelbert G, Venier AC, Cismondi IA, Becerra A, Vazquez JCG, Fernandez E, De Paul AL, Guelbert N, Noher I. “Atypical” Phenotypes of Neuronal Ceroid Lipofuscinosis: The Argentine Experience in the Genomic Era. J inborn errors metab screen 2021. [DOI: 10.1590/2326-4594-jiems-2021-0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Favio Pesaola
- Universidad Nacional de Córdoba, Argentina; Instituto de Investigación en Ciencias de la Salud, Argentina
| | - Guillermo Guelbert
- Universidad Nacional de Córdoba, Argentina; Hospital de Niños de la Provincia de Córdoba, Argentina
| | - Ana Clara Venier
- Universidad Nacional de Córdoba, Argentina; Instituto de Investigación en Ciencias de la Salud, Argentina
| | - Inés Adriana Cismondi
- Universidad Nacional de Córdoba, Argentina; Universidad Nacional de Córdoba, Argentina
| | - Adriana Becerra
- Universidad Nacional de Córdoba, Argentina; Hospital de Niños de la Provincia de Córdoba, Argentina
| | | | | | - Ana Lucia De Paul
- Instituto de Investigación en Ciencias de la Salud, Argentina; Universidad Nacional de Córdoba, Argentina
| | - Norberto Guelbert
- Universidad Nacional de Córdoba, Argentina; Clínica Universitaria Reina Fabiola, Argentina
| | - Inés Noher
- Universidad Nacional de Córdoba, Argentina
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Li R, Dworkin R, Chapman B, Becerra A, Yang L, Mooney C, Seplaki C. Prevalence, Incidence, and Recovery Rate of Impactful Chronic Pain, and Predictors for the Recovery Process in Later Life. Ann Epidemiol 2020. [DOI: 10.1016/j.annepidem.2020.08.051] [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: 10/23/2022]
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Bahamondes L, Laporte M, Margatho D, de Amorim HSF, Brasil C, Charles CM, Becerra A, Hidalgo MM. Maternal health among Venezuelan women migrants at the border of Brazil. BMC Public Health 2020; 20:1771. [PMID: 33228642 PMCID: PMC7682772 DOI: 10.1186/s12889-020-09912-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/17/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Guaranteeing the sexual and reproductive health and rights (SRHR) of populations living in fragile and humanitarian settings is essential and constitutes a basic human right. Compounded by the inherent vulnerabilities of women in crises, substantial complications are directly associated with increased risks of poor SRHR outcomes for displaced populations. The migration of Venezuelans, displaced due to current economic circumstances, is one of the largest in Latin America's history. This study aims to provide an overview of the sexual and reproductive health (SRH) issues affecting migrant Venezuelan women in the state of Roraima, Brazil. METHODS Face-to-face interviews were conducted from 24 to 30 November 2019. Data collection covered various issues involving access to and use of SRH services by 405 migrant Venezuelan women aged 18-49 years. The Minimum Initial Service Package readiness assessment tools, available from the Inter-Agency Working Group on Reproductive Health in Crises, were used in the data collection. RESULTS Most commonly, the women reported unmet family planning needs. Of these, a significant proportion reported being unable to obtain contraceptive methods, particularly long-acting reversible contraceptives, either due to the woman's inability to access them or their unavailability at healthcare centres. Although a significant proportion of women were largely satisfied with the attention received at the maternity hospital, both before and during childbirth, 24.0% of pregnant or postpartum women failed to receive any prenatal or postnatal care. CONCLUSION Meeting the essential SRHR needs of migrant Venezuelan women in Roraima, Brazil is a challenge that has yet to be fully addressed. Given the size of this migrant population, the Brazilian healthcare system has failed to adapt sufficiently to meet their needs; however, problems with healthcare provision are similar for migrants and Brazilian citizens. Efforts need to be encouraged not only in governmental health sectors, but also with academic, non-governmental and international organisations, including a coordinated approach to ensure a comprehensive SRHR response. Given the current high risks associated with the SARS-CoV-2 pandemic, meeting the SRHR needs of migrant populations has become more critical than ever.
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Affiliation(s)
- L Bahamondes
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil.
| | - M Laporte
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil
| | - D Margatho
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil
| | - H S F de Amorim
- Direction of Basic Attention Care, Health Secretary, State of Roraima, Boa Vista, RR, Brazil
| | - C Brasil
- Direction of Basic Attention Care, Health Secretary, Municipality of Boa Vista, Boa Vista, RR, Brazil
| | - C M Charles
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil
| | - A Becerra
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil
| | - M M Hidalgo
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Caixa Postal 6181, Campinas, SP, 13084-971, Brazil
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Becerra A, Mahmut A. STREPTOCOCCUS VIRIDANS AORTIC PARAVALVULAR ABSCESS IN A PROSTHETIC VALVE OF AN IMMUNOCOMPETENT HOST WITH MARFAN’S SYNDROME. Chest 2020. [DOI: 10.1016/j.chest.2020.05.254] [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: 10/24/2022] Open
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de Rooij J, Terova O, Hermans P, Detmers F, Becerra A. Aav downstream processing – are we ready for industrial scale gene therapy? Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.495] [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: 10/24/2022]
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Silvera-Ruiz SM, Arranz JA, Häberle J, Angaroni CJ, Bezard M, Guelbert N, Becerra A, Peralta F, de Kremer RD, Laróvere LE. Urea cycle disorders in Argentine patients: clinical presentation, biochemical and genetic findings. Orphanet J Rare Dis 2019; 14:203. [PMID: 31426867 PMCID: PMC6700778 DOI: 10.1186/s13023-019-1177-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 03/27/2019] [Accepted: 08/13/2019] [Indexed: 12/30/2022] Open
Abstract
Background The incidence, prevalence, and molecular epidemiology of urea cycle disorders (UCDs) in Argentina remain underexplored. The present study is the first to thoroughly assess the clinical and molecular profiles of UCD patients examined at a single reference center in Argentina. Results Forty-nine UCD cases were collected. About half (26/49, 53%) manifested neonatally with classical presentation and had a high mortality (25/26, 96%). Ornithine transcarbamylase deficiency (OTCD) was the most common UCD (26 patients). Argininosuccinate synthetase deficiency (ASSD) was detected in 19 cases, while argininosuccinate lyase deficiency (ASLD) was diagnosed in 4 cases. Molecular genetic analysis revealed 8 private OTC mutations and two large deletion/duplication events in the OTC gene. Most mutations in the ASS1 and ASL genes were recurrent missense changes, and four alterations were novel. The clinical outcome of our UCD cohort was poor, with an overall mortality of 57% (28/49 cases), and a 28% (6/21) disability rate among the survivors. Conclusions Most patients in our case series showed severe neonatal onset, with high morbidity/mortality. We detected in total 19 mutations, most of them recurrent and of high frequency worldwide. Noteworthy, we highlight the presence of a geographic cluster with high prevalence of a point mutation in the ASS1 gene. This study suggests that these disorders may be more frequent than commonly assumed, and stresses the need for increased awareness amongst health professionals and greater availability of diagnostic tools for accurate identification, early diagnosis, and timely treatment. Electronic supplementary material The online version of this article (10.1186/s13023-019-1177-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Silene M Silvera-Ruiz
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina.
| | - José A Arranz
- Unitat Metab, Hospital Vall d'Hebron, Barcelona, Spain
| | - Johannes Häberle
- University Children's Hospital and Children's Research Center, Zurich, Switzerland
| | - Celia J Angaroni
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina
| | - Miriam Bezard
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina
| | - Norberto Guelbert
- Sección Enfermedades Metabólicas, Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
| | - Adriana Becerra
- Sección Enfermedades Metabólicas, Hospital de Niños de la Santísima Trinidad, Córdoba, Argentina
| | - Fernanda Peralta
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina
| | - Raquel Dodelson de Kremer
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina
| | - Laura E Laróvere
- Centro de Estudio de las Metabolopatías Congénitas, Hospital de Niños de la Santísima Trinidad, Cátedra de Clínica Pediátrica, Fac. Cs. Médicas, UNC, Ferroviarios 1250, CP 5014, Córdoba, Argentina
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Moreno-Arrones OM, Becerra A, Vano-Galvan S. Therapeutic experience with oral finasteride for androgenetic alopecia in female-to-male transgender patients. Clin Exp Dermatol 2017; 42:743-748. [DOI: 10.1111/ced.13184] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2016] [Indexed: 11/29/2022]
Affiliation(s)
| | - A. Becerra
- Dermatology Department; Hospital Universitario Ramon y Cajal; Madrid Spain
| | - S. Vano-Galvan
- Dermatology Department; Hospital Universitario Ramon y Cajal; Madrid Spain
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Triguero J, García A, Molina A, San Miguel C, Notario P, Villegas T, Becerra A, Expósito M, Muffak K, Álvarez MJ, Fundora Y. Complications Associated With Liver Transplantation in Recipients With Body Mass Index >35 kg/m(2): Would It Be a Poor Prognosis Predictive Factor? Transplant Proc 2016; 47:2650-2. [PMID: 26680062 DOI: 10.1016/j.transproceed.2015.10.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/04/2015] [Accepted: 10/07/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND Obesity is a global epidemic that continues to increase in a great number of countries, and it has become a major public health problem in Spain. Unfortunately, the impact of obesity on survival in liver transplantation (LT) recipients is underestimated and controversial. The aim of this study was to determine if obesity is a risk factor for morbidity and mortality after LT. METHODS In a retrospective cohort study of the records of 180 consecutive patients who had undergone to LT from 2007 to 2013, 11 obese patients with body mass index (BMI) >35 kg/m(2) were identified. Their data have been compared with recipients with BMI 20-25 kg/m(2). RESULTS There were no differences in demographic data, Child-Pugh score, Model for End-Stage Liver Disease score, or cause of liver failure. BMI >35 kg/m(2) recipients had a significantly higher rate of portal vein thrombosis before LT, compared with the BMI 20-25 kg/m(2) group (36.5% vs 13.9%; P = .041). There were also no differences in development of post-reperfusion syndrome. The groups were also comparable concerning morbidity rate after LT, stay in the intensive care unit, and global hospital stay. However, the mortality rate was significantly higher in the obese group compared with the nonobese group (72.7% vs 38.9%; P = .032). CONCLUSIONS The results of the study clearly demonstrate higher mortality rates in obese patients undergoing LT; thus, it is fair to consider obesity as a poor prognosis predictive factor concerning mortality rate.
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Affiliation(s)
- J Triguero
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain.
| | - A García
- Biostatistical and Epidemiological Support Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - A Molina
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - C San Miguel
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - P Notario
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - T Villegas
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - A Becerra
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - M Expósito
- Biostatistical and Epidemiological Support Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - K Muffak
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - M J Álvarez
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - Y Fundora
- General, Digestive Surgery, and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
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San Miguel C, Vílchez A, Villegas T, Granero KM, Becerra A, López MÁ, Expósito M, Fundora Y. Influence of Waiting List in Recurrence Disease of Hepatocellular Carcinoma. Transplant Proc 2015; 47:2636-8. [PMID: 26680057 DOI: 10.1016/j.transproceed.2015.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/04/2015] [Accepted: 10/07/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND We describe the results of our liver transplantation (LT) patients for hepatocellular carcinoma (HCC) in 2004 to 2012 to determine the differences on the basis of time on the waiting list to establish the risk of recurrence of liver disease. METHODS Clinical variables were recorded for both donors and recipients as well as variables of diagnosis, the use of transarterial chemoembolization during the waiting list time (WLT), complications, re-transplantation, and exitus. Fifty-eight patients were analyzed. Mean age was 57 ± 8 years (men, 83%; 48 patients). Viral etiology of HCC was 50% (n = 29); alcoholic, 26% (n = 15); and others, 24% (n = 14). RESULTS Exitus was established in 24 patients (41%); only 5 patients (7%) were attributable to HCC. In the cohort of patients with less than 6 months of WLT, we registered both higher rates of downstaging protocols (10.7% vs 7.5%) and tumor size (3 cm vs 2 cm) compared with the other group. Bivariate studies were conducted according to the WLT (WLT <6 months, WLT ≥6 months), finding differences in recurrence of liver disease (P < .05). This fact was confirmed after a binary logistic regression. CONCLUSIONS Our results in a subgroup of less than 6 months of WLT included patients with increased tumor size or presentation of multiple nodes, with a worse prognosis and therefore to be prioritized in the treatment of LT. Therefore, in our population there is a significant risk of tumor recurrence in patients with less WLT for LT, but it cannot be overestimated to all type of patients with HCC.
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Affiliation(s)
- C San Miguel
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain.
| | - A Vílchez
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - T Villegas
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - K M Granero
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - A Becerra
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - M Á López
- Hepatology Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - M Expósito
- Department of Research, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
| | - Y Fundora
- General, Digestive Surgery and Liver Transplantation Department, Virgen de las Nieves University Hospital (University Hospital Centre of Granada), Granada, Spain
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16
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San Miguel C, Muffak K, Triguero J, Becerra A, Villegas T, Nogueras F, Expósito M, Fundora Y. Role of Transarterial Chemoembolization to Downstage Hepatocellular Carcinoma Within the Milan Criteria. Transplant Proc 2015; 47:2631-3. [DOI: 10.1016/j.transproceed.2015.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 10/04/2015] [Accepted: 10/07/2015] [Indexed: 12/18/2022]
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17
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San Miguel C, Fundora Y, Triguero J, Muffak K, Villegas T, Becerra A, Garrote D, Ferrón J. Immunosuppression Strategies in the Treatment of Hepatocellular Carcinoma in Virgen de las Nieves University Hospital. Transplant Proc 2015; 47:2371-3. [DOI: 10.1016/j.transproceed.2015.08.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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18
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Kohan R, Pesaola F, Guelbert N, Pons P, Oller-Ramírez AM, Rautenberg G, Becerra A, Sims K, Xin W, Cismondi IA, Noher de Halac I. The neuronal ceroid lipofuscinoses program: A translational research experience in Argentina. Biochim Biophys Acta Mol Basis Dis 2015; 1852:2301-11. [PMID: 25976102 DOI: 10.1016/j.bbadis.2015.05.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 04/28/2015] [Revised: 04/29/2015] [Accepted: 05/05/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND The Argentinean program was initiated more than a decade ago as the first experience of systematic translational research focused on NCL in Latin America. The aim was to overcome misdiagnoses and underdiagnoses in the region. SUBJECTS 216 NCL suspected individuals from 8 different countries and their direct family members. METHODS Clinical assessment, enzyme testing, electron microscopy, and DNA screening. RESULTS AND DISCUSSION 1) The study confirmed NCL disease in 122 subjects. Phenotypic studies comprised epileptic seizures and movement disorders, ophthalmology, neurophysiology, image analysis, rating scales, enzyme testing, and electron microscopy, carried out under a consensus algorithm; 2) DNA screening and validation of mutations in genes PPT1 (CLN1), TPP1 (CLN2), CLN3, CLN5, CLN6, MFSD8 (CLN7), and CLN8: characterization of variant types, novel/known mutations and polymorphisms; 3) Progress of the epidemiological picture in Latin America; and 4) NCL-like pathology studies in progress. The Translational Research Program was highly efficient in addressing the misdiagnosis/underdiagnosis in the NCL disorders. The study of "orphan diseases" in a public administrated hospital should be adopted by the health systems, as it positively impacts upon the family's quality of life, the collection of epidemiological data, and triggers research advances. This article is part of a Special Issue entitled: "Current Research on the Neuronal Ceroid Lipofuscinoses (Batten Disease)".
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Affiliation(s)
- Romina Kohan
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina; Facultad de Odontología, Universidad Nacional de Córdoba, Haya de la Torre s/n, 5000 Córdoba, Argentina.
| | - Favio Pesaola
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, C1033AAJ CABA, Argentina.
| | - Norberto Guelbert
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina.
| | - Patricia Pons
- Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Haya de la Torre esq. Enrique Barros, 1º piso, 5000 Córdoba, Argentina.
| | - Ana María Oller-Ramírez
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina.
| | - Gisela Rautenberg
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina.
| | - Adriana Becerra
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina.
| | - Katherine Sims
- Massachussets General Hospital, Neurology Department, Center for Genetic Research [CHGR], Boston, MA 02114, USA.
| | - Winnie Xin
- Massachussets General Hospital, Neurology Department, Center for Genetic Research [CHGR], Boston, MA 02114, USA.
| | - Inés Adriana Cismondi
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina; Facultad de Odontología, Universidad Nacional de Córdoba, Haya de la Torre s/n, 5000 Córdoba, Argentina.
| | - Inés Noher de Halac
- Centro de Estudio de las Metabolopatías Congénitas (CEMECO), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Ferroviarios 1250, 5014 Córdoba, Argentina; Facultad de Odontología, Universidad Nacional de Córdoba, Haya de la Torre s/n, 5000 Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, C1033AAJ CABA, Argentina.
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Simon F, Echeverria C, Montorfano I, Becerra A, Varela D, Hermosilla T, Cabello-Verrugio C, Armisen R. P173Vascular endothelial fibrosis induced by endotoxin: characteristics, mechanism and therapeutic perspectives. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu082.109] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zambudio N, Fundora Y, Muffak K, Villegas T, Becerra A, Garrote D, Ferrón JA. Experience of the transplant unit from Virgen de las Nieves Hospital in using liver grafts from asystolic donors. Transplant Proc 2013; 45:3573-4. [PMID: 24314962 DOI: 10.1016/j.transproceed.2013.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/18/2022]
Abstract
Given the shortage of donors, it has become increasingly necessary to use alternative sources to meet the growing demand for organs, and evolution in the use of asystolic donors is proving to be an important resource in helping to meet those needs. The goal of this study is to describe the initial results of our experience with Type II asystolic donation. An observational retrospective study was conducted to analyze the variables of four cases in this type of donation. After the analysis we conclude that, despite the limited number of cases in our series, the results are compatible with larger series and permit us to continue to value this method as a resource for broadening the donor pool.
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Affiliation(s)
- N Zambudio
- Hospital Virgen de las Nieves, Granada, Spain
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San Miguel C, Fundora Y, Muffak K, Villegas T, Becerra A, Garrote D, Ferrón JA. Liver transplantation using low-weight recipients from a graft split program. Transplant Proc 2013; 45:3644-6. [PMID: 24314983 DOI: 10.1016/j.transproceed.2013.10.034] [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: 11/19/2022]
Abstract
We present our experience with a split liver (SL) program shared with the children's liver transplantation (LT) program from 2 different hospitals in the use of partial grafts from cadaver donors in brain death. We describe an observational, retrospective study, which included patients who underwent a SL transplantation in our center between January 2006 and December 2012. Clinical variables were recorded of both donors and recipients and their data were analyzed using SPSS 19.0 software. Of a total of 204 LT, 4 (2%) patients were treated with a SL. The causes of LT were alcoholic cirrhosis in 2 cases, cryptogenic cirrhosis, and primary biliary cirrhosis (PBC). In all cases there was a temporary portocaval shunt. The confluence of the hepatic veins of the recipient was anastomosed to the donor vena cava and arterial anastomosis was performed. The reconstruction was hepato-choledochal in all cases. There were no cases of postreperfusion syndrome or vascular thrombosis and no retransplantation was necessary. Currently, 3 of the 4 cases are still alive. Death in the other patient was due to mesenteric ischemia. Our center has participated in the development of a protocol that considers the indication of this technique provided expert groups are involved in its development, regardless of hospital level. This will expand the pool of donors and partially solve the current problems with available grafting.
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Affiliation(s)
- C San Miguel
- Virgen de las Nieves University Hospital, Granada, Spain
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Villegas T, Olmedo C, Muffak-Granero K, Comino A, Becerra A, Villar JM, Fundora Y, Garrote D, Bueno P, Ferrón JA. Study of superoxide dysmutase isozyme activities in hepatitis C virus-positive cirrhotic liver transplant recipients. Transplant Proc 2012; 44:2087-8. [PMID: 22974918 DOI: 10.1016/j.transproceed.2012.07.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- T Villegas
- General and Digestive Surgery Service, Virgen de las Nieves University Hospital, Granada, Spain
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Schmidt DJ, Pickett BE, Camacho D, Comach G, Xhaja K, Lennon NJ, Rizzolo K, de Bosch N, Becerra A, Nogueira ML, Mondini A, da Silva EV, Vasconcelos PF, Muñoz-Jordán JL, Santiago GA, Ocazionez R, Gehrke L, Lefkowitz EJ, Birren BW, Henn MR, Bosch I. A phylogenetic analysis using full-length viral genomes of South American dengue serotype 3 in consecutive Venezuelan outbreaks reveals a novel NS5 mutation. Infect Genet Evol 2011; 11:2011-9. [PMID: 21964598 PMCID: PMC3565618 DOI: 10.1016/j.meegid.2011.09.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 09/05/2011] [Accepted: 09/08/2011] [Indexed: 11/24/2022]
Abstract
Dengue virus currently causes 50-100 million infections annually. Comprehensive knowledge about the evolution of Dengue in response to selection pressure is currently unavailable, but would greatly enhance vaccine design efforts. In the current study, we sequenced 187 new dengue virus serotype 3 (DENV-3) genotype III whole genomes isolated from Asia and the Americas. We analyzed them together with previously-sequenced isolates to gain a more detailed understanding of the evolutionary adaptations existing in this prevalent American serotype. In order to analyze the phylogenetic dynamics of DENV-3 during outbreak periods; we incorporated datasets of 48 and 11 sequences spanning two major outbreaks in Venezuela during 2001 and 2007-2008, respectively. Our phylogenetic analysis of newly sequenced viruses shows that subsets of genomes cluster primarily by geographic location, and secondarily by time of virus isolation. DENV-3 genotype III sequences from Asia are significantly divergent from those from the Americas due to their geographical separation and subsequent speciation. We measured amino acid variation for the E protein by calculating the Shannon entropy at each position between Asian and American genomes. We found a cluster of seven amino acid substitutions having high variability within E protein domain III, which has previously been implicated in serotype-specific neutralization escape mutants. No novel mutations were found in the E protein of sequences isolated during either Venezuelan outbreak. Shannon entropy analysis of the NS5 polymerase mature protein revealed that a G374E mutation, in a region that contributes to interferon resistance in other flaviviruses by interfering with JAK-STAT signaling was present in both the Asian and American sequences from the 2007-2008 Venezuelan outbreak, but was absent in the sequences from the 2001 Venezuelan outbreak. In addition to E, several NS5 amino acid changes were unique to the 2007-2008 epidemic in Venezuela and may give additional insight into the adaptive response of DENV-3 at the population level.
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Affiliation(s)
- DJ Schmidt
- University of Massachusetts Medical School, Worcester, MA, US. Current address DJS: Tuft University Veternary School, North Grafton, MA
| | - BE Pickett
- University of Alabama at Birmingham, Birmingham, AL. Current address BEP: University of Texas Southwestern Medical Center, Dallas, TX, US
| | - D Camacho
- Biomed, Universidad de Carabobo, Maracay, Venezuela
| | - G Comach
- Biomed, Universidad de Carabobo, Maracay, Venezuela
| | - K Xhaja
- University of Massachusetts Medical School, Worcester, MA, US. Current address DJS: Tuft University Veternary School, North Grafton, MA
| | | | - K Rizzolo
- University of Massachusetts Medical School, Worcester, MA, US. Current address DJS: Tuft University Veternary School, North Grafton, MA
- Broad Institute. Cambridge, MA, US
| | - N de Bosch
- Banco Metropolitano de Caracas, Universidad Central de Venezuela, Caracas, Venezuela
| | - A Becerra
- University of Massachusetts Medical School, Worcester, MA, US. Current address DJS: Tuft University Veternary School, North Grafton, MA
- Banco Metropolitano de Caracas, Universidad Central de Venezuela, Caracas, Venezuela
| | - ML Nogueira
- Faculdade de Medicina de São José do Rio Preto, Laboratório de Pesquisas em Virologia, Departamento de Doenças Infecciosas e Parasitárias, São José do Rio Preto, SP, Brazil
| | - A Mondini
- Faculdade de Medicina de São José do Rio Preto, Laboratório de Pesquisas em Virologia, Departamento de Doenças Infecciosas e Parasitárias, São José do Rio Preto, SP, Brazil
| | - EV da Silva
- Instituto Nacional de Ciência e Tecnologia em Dengue, Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Belo Horizonte and Instituto Nacional de Ciência e Tecnologia para Febres Hemorrágicas Virais (INCT-FHV), Instituto Evandro Chagas, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - PF Vasconcelos
- Instituto Nacional de Ciência e Tecnologia em Dengue, Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Belo Horizonte and Instituto Nacional de Ciência e Tecnologia para Febres Hemorrágicas Virais (INCT-FHV), Instituto Evandro Chagas, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - JL Muñoz-Jordán
- Centers for Disease Control and Prevention, San Juan, Puerto Rico, US
| | - GA Santiago
- Centers for Disease Control and Prevention, San Juan, Puerto Rico, US
| | - R Ocazionez
- Universidad Industrial de Santander, Santander, Colombia
| | - L Gehrke
- Massachusetts Institute of Technology. Division of Heath Science and Technology. Cambridge, MA, US
| | - EJ Lefkowitz
- University of Alabama at Birmingham, Birmingham, AL. Current address BEP: University of Texas Southwestern Medical Center, Dallas, TX, US
| | | | - MR Henn
- Broad Institute. Cambridge, MA, US
| | - I Bosch
- University of Massachusetts Medical School, Worcester, MA, US. Current address DJS: Tuft University Veternary School, North Grafton, MA
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Espinosa MD, Olmedo C, Muffak-Granero K, Comino A, Nogueras MF, Villegas MT, Becerra A, Garrote D, Bueno P, Ferron JA. Preoperative natriuretic peptide-B values and ascites in male liver transplant recipients. Transplant Proc 2011; 43:705-7. [PMID: 21486579 DOI: 10.1016/j.transproceed.2011.01.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 01/16/2023]
Abstract
Plasma preoperative values of natriuretic B peptide (pro-BNP) were correlated with ascites in men experiencing hepatic cirrhosis due to different etiologies on the active waiting list for liver transplantation. The study was performed in 54 male recipients of a liver transplant. Written informed consent was obtained from the patients or their relatives, and the study protocol was approved by our local Clinical Research (Ethics) Committee. Male patients were classified into two groups: group 1 included patients with alcoholic hepatic cirrhosis (n = 30) distributed as 19 men with no ascites, four with nonrefractory ascites, and seven with refractory ascites; group 2 included cases of viral hepatitis cirrhosis (n = 24) distributed as 13 men with no ascites, nine with non-refractory ascites, and two with refractory ascites. A group of six healthy male volunteers was used to establish normal (basal) values of pro-BNP and left auricular diameter (LAD). Pro-BNP values were determined in plasma samples by an electrochemiluminiscence immunoassay. Pro-BNP plasma levels in patients with alcoholic cirrhosis were threefold greater among patients with no ascites or no refractory ascites compared with healthy men, whereas pro-BNP values were fivefold enhanced among alcoholic patients with refractory ascites. The viral hepatitis cirrhosis group showed pro-BNP plasma values 1.5-fold enhanced in men with no ascites, whereas pro-BNP reached fivefold with either nonrefractory or refractory ascites. The enhanced pro-BNP plasma levels indicated advanced hepatic degradation, seemingly related to the presence of refractory ascites associated with cirrhosis.
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Affiliation(s)
- M-D Espinosa
- Virgen de las Nieves University Hospital, Granada, Spain
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25
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Gonzalez G, Becerra A, Rodriguez Melo F, Campos T. [Clinical mycology and antifungals in the pediatric population]. Drugs Today (Barc) 2008; 44 Suppl 4:7-21. [PMID: 19536370] [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: 05/27/2023]
Abstract
Infections caused by Candida spp. and Aspergillus spp. account for 90% of all fungal infections and are the most significant causes of human morbidity and mortality. Candida albicans causes between 50 and 60% of all nosocomial fungal infections. The wet mount test and culture are the screening methods used in leading clinical laboratories for the detection of Candida spp. However, yeasts should be strictly classified mainly based on their physiological and biochemical characteristics, through a series of morphological and biochemical laboratory tests. As a result of the increase in systemic fungal infections and the spread of antifungal medications, it was necessary to establish standardized in vitro sensitivity tests as a guideline for the therapeutic decision-making process. Among antifungal agents available today we find antimycotics such as amphotericin B, 5-fluorocytosine (5-FC), fluconazole, voriconazole, posaconazole, and ravuconazole. Additionally, there is the recently developed group of echinocandines, which includes caspofungin, micafungin and anidulafungine.
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Affiliation(s)
- G Gonzalez
- Hospital Universitario de Nuevo Leon, Monterrey, Nuevo Leon, Mexico
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26
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Pola ML, Algarra M, Becerra A, Hernandez* M. Cyclodextrin Enhanced Spectrofluorimetric Determination of Melatonin in Pharmaceuticals and Urine. ANAL LETT 2008. [DOI: 10.1080/00032710008543097] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Martin-Lazaro J, Lucio M, Zamora J, Maties M, Ripoll E, Becerra A. T01-P-018 Classical and emergent cardiovascular risk factors in patients with metabolic syndrome. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80535-5] [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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28
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Becerra A, Martin-Lázaro J, Zamora J, Lucio M, Llopis J, Maties M, Aguilar V, Martinez-Para M. W09.206 Insulin resistance and metabolic syndrome in an obese population. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90205-5] [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: 11/28/2022]
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30
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De Luis DA, Becerra A, Lahera M, Botella JI, Varela C. A randomized cross-over study comparing cabergoline and quinagolide in the treatment of hyperprolactinemic patients. J Endocrinol Invest 2000; 23:428-34. [PMID: 11005266 DOI: 10.1007/bf03343751] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Quinagolide (QUI) and cabergoline (CAB) are dopamine agonists recently introduced for the treatment of hyperprolactinemia. In the present study, these drugs have been compared in terms of effectiveness and tolerability. Twenty patients (18 females and 2 males) with hyperprolactinemia (8 with microprolactinomas, 6 with idiopathic hyperprolactinemia and 6 with empty sella turcica syndrome) were treated with oral QUI (75 microg once daily) and CAB (0,5 mg twice weekly), in a randomized cross-over trial with placebo between both drugs. Each drug was administered for 12 weeks, separated by other 12 weeks with placebo. PRL levels decreased with both drugs at 2 or 4 weeks of starting the treatment, without differences between both drugs at weeks 4, 8 and 12. At week 12, normal PRL levels (<20 ng/ml) were attained in 90% patients with CAB and only in 75% patients with QUI (p<0.05). After discontinuation of treatment, significant increase in serum PRL was higher after QUI withdrawal than after CAB. Clinical efficacy of both treatments was similar in terms of improvement amenorrhea, oligomenorrhea, galactorrhea, and impotence. All patients completed both cycles of treatment, and the most frequent side-effects were nausea, headache and dizziness, without significant differences between CAB (30%) and QUI (55%). Our study indicates that, at the doses employed here, CAB showed a high percentage of patients with normal PRL at the end of treatment and long-lasting efficacy in the levels of PRL. Clinical response and side-effects were similar in both drugs.
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Affiliation(s)
- D A De Luis
- Institute of Endocrinology and Nutrition, Medicine School, Valladolid, Spain.
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31
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Muros MA, Llamas-Elvira JM, Ramírez-Navarro A, Gómez MJ, Rodríguez-Fernández A, Muros T, López de la Torre M, Becerra A, Carreras JL. Utility of fluorine-18-fluorodeoxyglucose positron emission tomography in differentiated thyroid carcinoma with negative radioiodine scans and elevated serum thyroglobulin levels. Am J Surg 2000; 179:457-61. [PMID: 11004330 DOI: 10.1016/s0002-9610(00)00381-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [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: 11/27/2022]
Abstract
BACKGROUND This study aimed to determine the role of fluorine-18-fluorodeoxyglucose positron emission tomography (FDG-PET) in the follow-up of patients who underwent total thyroidectomy and iodine-131 ((131)I) ablation therapy for differentiated thyroid cancer and presented increased thyroglobulin levels with negative (131)I and thallium-201 ((201)Tl) scans. METHODS Two patients with follicular carcinoma and eight with papillary tumors underwent total thyroidectomy and (131)I therapy until the (131)I scan was negative. (131)I and (201)Tl scans were performed with negative results in all cases, while serum thyroglobulin measurements were all positive with negative thyroglobulin autoantibodies. One week after the (131)I scans, all the patients underwent FDG-PET whole-body scans. RESULTS The FDG-PET scan detected in 4 patients, a single focal increase of FDG uptake in one lymph node metastasis (subsequently confirmed histologically); in 1 patient, multiple pathological focal uptakes in brain, neck, and chest; and in 1 patient, two mild focal uptakes in the mediastinum, close to the tracheal branch. In 2 other patients, pathological FDG uptakes in cervical spine and mediastinum were not confirmed by other imaging techniques, and in the 2 remaining patients the scan results were inconclusive. The sensitivity of FDG-PET whole-body scan for detecting metastatic thyroid cancer was 60%. CONCLUSIONS This study indicates that the FDG-PET whole-body scan is a useful tool in the follow-up of patients with differentiated thyroid cancer, negative (131)I and (201)Tl scans and elevated serum thyroglobulin levels. The FDG-PET scan detects metastatic disease in 60% of patients with differentiated thyroid cancer, enabling surgical therapy to be performed on accessible lesions.
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Affiliation(s)
- M A Muros
- Nuclear Medicine, Virgen de las Nieves Hospital, Granada, Spain
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33
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Becerra A, Bellido D, Luengo A, Piédrola G, De Luis DA. Lipoprotein(a) and other lipoproteins in hypothyroid patients before and after thyroid replacement therapy. Clin Nutr 1999; 18:319-22. [PMID: 10601541 DOI: 10.1016/s0261-5614(98)80031-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 12/20/2022]
Abstract
AIMS To analyse the influence of thyroid hormones on serum lipoprotein(a) (Lp(a)) concentration and other lipid parameters, and hence potentially on coronary artery disease (CAD) risk. METHODS Thirty-six patients with hypothyroidism and 165 age-matched control euthyroid subjects were evaluated in a cross- sectional study, determining thyroid function tests and fasting serum lipids and lipoproteins. In a follow-up study for those hypothyroid patients the same determinations were repeated after normalization of thyroid state by levothyroxine (L-T(4)) replacement therapy. Patients needing other treatments were excluded. At baseline, patients with hypothyroidism had significantly higher levels of Lp(a), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), apolipoprotein (apo) A-I and apo B, and a higher TC/high-density lipoprotein cholesterol (HDL-C) ratio than control subjects. RESULTS Severity of the hypothyroid state, expressed by serum thyroid-stimulating hormone, was correlated with serum levels of Lp(a), LDL-C, and TC (r= 0.64, 0.52, 0.49, P= 0.005, P= 0.033, P= 0. 048, respectively). The pretreatment Lp(a) levels were also correlated with those of posttreatment Lp(a)(r= 0.68, P= 0.002). All patients, who presented basal Lp(a) levels higher than 30 mg/dl, showed a decrease in Lp(a) concentrations by L-T(4)therapy, and these normalized in eight cases (22.2%). Euthyroid state gave rise to a significant reduction of serum Lp(a) by 32.3%, of LDL-C by 22. 8%, of TC by 17%, of apo A-I by 9.6%, and of apo B by 9.3%. After L-T(4)therapy, CAD risk, expressed as TC/HDL-C ratio, decreased by 19.9%. CONCLUSIONS These results show that hypothyroidism is associated not only with elevated serum levels of LDL-C but also with elevated serum Lp(a) concentrations. Lp(a) levels may be at least partially modulated by thyroid hormone-dependent mechanisms, thus increasing the risk of developing premature atherosclerosis in hypothyroid state, that might be reduced by L-T(4)therapy.
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Affiliation(s)
- A Becerra
- Department of Endocrinology, Hospital Ramón y Cajal, Madrid, Spain
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34
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Peretó JG, Velasco AM, Becerra A, Lazcano A. Comparative biochemistry of CO2 fixation and the evolution of autotrophy. Int Microbiol 1999; 2:3-10. [PMID: 10943384] [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: 02/17/2023]
Abstract
Carbon dioxide fixation is a polyphyletic trait that has evolved in widely separated prokaryotic branches. The three principal CO2-assimilation pathways are (i) the reductive pentose-phosphate cycle, i.e. the Calvin-Benson cycle; (ii) the reductive citric acid (or Arnon) cycle; and (iii) the net synthesis of acetyl-CoA from CO/CO2, or Wood pathway. Sequence analysis and the comparative biochemistry of these routes suggest that all of them were shaped to a considerable extent by the evolutionary recruitment of enzymes. Molecular phylogenetic trees show that the Calvin-Benson cycle was a relatively late development in the (eu)bacterial branch, suggesting that some form(s) of carbon assimilation may have been operative before chlorophyll-based photosynthesis. On the other hand, the ample phylogenetic distribution of both the Arnon and the Wood pathways does not allow us to infer which one of them is older. However, different lines of evidence, including experimental reports on the NiS/FeS-mediated C-C bond formation from CO and CH3SH are used here to argue that the first CO2-fixation route may have been a semi-enzymatic Wood-like pathway.
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Affiliation(s)
- J G Peretó
- Department of Biochemistry and Molecular Biology, University of Valencia, Spain.
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Abstract
Purine nucleotides are formed de novo by a widespread biochemical route that may be of monophyletic origin, or are synthesized from preformed purine bases and nucleosides through different salvage pathways. Three monophyletic sets of purine salvage enzymes, each of which catalyzes mechanistically similar reactions, can be identified: (a) adenine-, xanthine-, hypoxanthine- and guanine-phosphoribosyltransferases, which are all homologous among themselves, as well as to nucleoside phosphorylases; (b) adenine deaminase, adenosine deaminase, and adenosine monophophate deaminase; and (c) guanine reductase and inosine monophosphate dehydrogenase. These homologies support the idea that substrate specificity is the outcome of gene duplication, and that the purine nucleotide salvage pathways were assembled by a patchwork process that probably took place before the divergence of the three cell domains (Bacteria, Archaea, and Eucarya). Based on the ability of adenine PRTase to catalyze the condensation of PRPP with 4-aminoimidazole-5-carboxamide (AICA), a simpler scheme of purine nucleotide biosynthesis is presented. This hypothetical route requires the prior evolution of PRPP biosynthesis. Since it has been argued that PRPP, nucleosides, and nucleotides are susceptible to hydrolysis, they are very unlikely prebiotic compounds. If this is the case, it implies that many purine salvage pathways appeared only after the evolution of phosphorylated sugar biosynthetic pathways made ribosides available.
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Affiliation(s)
- A Becerra
- Facultad de Ciencias, UNAM, México, D.F., México
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36
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De Luis D, Aller R, De La Calle H, Becerra A, Boixeda D, Cantón R. P.111 The eradication of Helicobacter pylori infection improves the lipid concentrations in diabetic patients. Clin Nutr 1998. [DOI: 10.1016/s0261-5614(98)80267-7] [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: 11/29/2022]
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37
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Piédrola G, Becerra A, González O, Almodóvar F, De Teresa M, García Robles R. 4.P.405 Clinical markers of insulin sensitivity. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89934-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Morillas C, Royo R, Meliá C, Maciá M, Martínez-Triguero M, Peña H, Muñoz M, Becerra A, Hernández A. 4.P.120 Cardiovascular risk factors in men with morbid obesity. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89648-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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39
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Luengo A, Becerra A, Colas J, Ramos F, Conde M. 5-07-17 Cerebrovascular diseases and levels of LPA. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86251-x] [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: 10/18/2022]
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40
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Luengo A, Becerra A, Ramos F, Figuerola A, Colás J. 4-48-01 Mononeuropathy and diabetes. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86190-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Luengo A, Becerra A, Figuerola A, Ramos F, Conde M. 3-48-06 Polyneuropathy and diabetes. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85866-2] [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: 10/18/2022]
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Affiliation(s)
- A Becerra
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-407, Cd. Universitaria, 04510 México, D. F. México
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González E, Becerra A, Laserna JJ. Direct determination of diuretic drugs in urine by capillary zone electrophoresis using fluorescence detection. J Chromatogr B Biomed Appl 1996; 687:145-50. [PMID: 9001961 DOI: 10.1016/s0378-4347(96)00100-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Four diuretic drugs banned in sport (amiloride, triamterene, bendroflumethiazide and bumetanide) have been separated by capillary zone electrophoresis (CZE) and detected using conventional fluorescence spectrometry. The effect of pH on electrophoretic parameters such as migration time, peak efficiency and peak height is discussed. Complete separation of the four drugs is achieved in less than 8 min at pH 8. No interference due to endogenous urine components is observed and thus direct urine analysis is feasible. Analytical figures of merit including precision and limits of detection are presented. Limits of detection range between 0.5 fmol for triamterene and 21.6 fmol for bumetanide.
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Affiliation(s)
- E González
- Department of Analytical Chemistry, University of Málaga, Spain
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44
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Suárez JF, De Teresa J, González A, Castro-Aguilar MT, Espinosa MD, López de Hierro M, Marín JL, Becerra A. [Papillary tumor of the pancreas diagnosed by fine-needle aspiration]. Rev Esp Enferm Dig 1996; 88:53-5. [PMID: 8616004] [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: 01/31/2023]
Abstract
We report the case of a 48 year-old woman with an epigastric palpable mass identified by abdominal echography and computed tomography as a solid pancreatic tumor. A cytology taken by fine needle aspiration guided by computed tomography was diagnostic of papillary pancreatic tumor, which was confirmed by surgical resection. We emphasize the low frequency and good prognosis of this type of tumor after surgical resection, and the utility of image techniques and fine needle aspiration to obtain a preoperative diagnosis.
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Affiliation(s)
- J F Suárez
- Servicio de Aparato Digestivo, Hospital Virgen de las Nieves, Granada
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46
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Prados M, Aragón R, Carranco MI, Sánchez F, Guillén V, Becerra A. [Allergic rhinitis in the region of Mérida]. Acta Otorrinolaringol Esp 1993; 44:431-3. [PMID: 8155357] [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: 01/29/2023]
Abstract
We studied the whole of 3,047 patients who consult our unit because of a presumable allergic affection. The 20% to suffer from allergic rhinitis. The most frequent clinical presentation has been rhinitis allergic seasonal followed by perennial and to extend seasonal. We have diagnosed through by prick-test, specific IgE and ocular provocation test. The ethiology more common has been the grass pollen together olive followed pollen grass from seasonal rhinitis. The mites dust from perennial rhinitis and the grass and polisensitizations to seasonal extend.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Allergens/immunology
- Animals
- Child
- Child, Preschool
- Female
- Fungi/immunology
- Humans
- Male
- Middle Aged
- Mites/immunology
- Pollen/immunology
- Rhinitis, Allergic, Perennial/diagnosis
- Rhinitis, Allergic, Perennial/epidemiology
- Rhinitis, Allergic, Perennial/etiology
- Rhinitis, Allergic, Seasonal/diagnosis
- Rhinitis, Allergic, Seasonal/epidemiology
- Rhinitis, Allergic, Seasonal/etiology
- Spain/epidemiology
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Affiliation(s)
- M Prados
- Servicio de ORL, Hospital de Mérida
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Tallón Lobo S, Bueno C, Becerra A, Jociles J, Pérez-Miranda M. [Empty sella turcica associated with diabetes insipidus. A report of a new case]. Rev Clin Esp 1991; 189:45. [PMID: 1924933] [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: 12/29/2022]
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Maddahi J, Crues J, Berman DS, Mericle J, Becerra A, Garcia EV, Henderson R, Bradley W. Noninvasive quantification of left ventricular myocardial mass by gated proton nuclear magnetic resonance imaging. J Am Coll Cardiol 1987; 10:682-92. [PMID: 3624672 DOI: 10.1016/s0735-1097(87)80213-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The validity of cardiac nuclear magnetic resonance imaging for determination of left ventricular myocardial mass was evaluated in nine dogs. A gated spin echo-pulsing sequence was used for in vivo imaging, obtaining 0.7 cm thick slices of the heart spaced by 1 cm. On each imaged slice, the left ventricular surface area was reproducibly determined by planimetry and was multiplied by slice spacing and specific gravity of the myocardium (1.05) to obtain slice mass. Total left ventricular mass was calculated by adding slice masses in short-axis (method I), transaxial (method II) and vertical long-axis (method III) orientations using Simpson's rule. With each method, masses of the portions of the left ventricle subject to partial volume effect either were not accounted for or alternatively were estimated from the same or an orthogonal imaging plane. Calculated left ventricular mass was compared with the actual excised left ventricular weight. With NMR imaging of in situ nonbeating hearts, best results were obtained when either method I or method II was used and partial volume effect was estimated either from the same or an orthogonal plane. With in vivo NMR imaging, best results were noted when method I was used and mass of the partial volume apex was calculated from transaxial slices: Y (in vivo NMR image) = 8.3 + 0.99X, r = 0.996, SEE = 3.14. For this method, the interobserver reliability coefficient and standard error of the measurement were 0.97 and 5.4, respectively. Compared with method I, in vivo methods II and III were associated with larger errors (SEE ranging from 13.03 to 19.03) regardless of the approach used to estimate partial volume effect. It is concluded that NMR imaging is a highly accurate noninvasive method for in vivo measurement of left ventricular mass in dogs and offers promise for accurate measurement of left ventricular mass in patients.
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