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Bustamante U. MA, Tello M, Carvache-Franco M, Carvache-Franco O, Carvache-Franco W. Statistical determination of service quality gaps in primary health care in Guayas, Ecuador. PLoS One 2024; 19:e0299994. [PMID: 38489322 PMCID: PMC10942063 DOI: 10.1371/journal.pone.0299994] [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] [Received: 08/16/2023] [Accepted: 02/19/2024] [Indexed: 03/17/2024] Open
Abstract
The present work determines the gaps between expectations and perceptions about the quality of the service that patients and families receive in primary health care (PHC) in Guayas, Ecuador. A descriptive, cross-sectional and non-experimental study was carried out, primarily prospective with respect to expectations and retrospective with respect to perceptions of service quality. For its development, a random sample of 533 users from the northern and southern urban sectors of the city of Guayaquil was determined, who were asked to answer a questionnaire. Their responses were collected using a seven-point scale intended to determine magnitudes of gaps, which were confirmed using the Wilcoxon test. The results reveal a significant gap between women, specifically those over 21 years of age who have studied at the technological and university level, and those who work. In general, the five dimensions of quality present significant gaps, highlighting that the lowest gap occurs when the medical professional listens attentively and treats the patient with kindness. Instead, the largest gap occurs because there are no available or easily accessible times for medical appointments. Finally, the dimension that indicates the gaps that service providers best resolve are the empathy items, recording the smallest deviations; On the contrary, the reliability dimension presents the greatest deviation, thus showing higher degrees of dissatisfaction, in both cases significant.
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Affiliation(s)
- Miguel A. Bustamante U.
- Facultad de Economía y Negocios, Escuela de Ingeniería Comercial, Universidad de Talca, Dos Norte 685, Talca, Chile
- Sistema de Posgrado, Universidad Católica de Santiago de Guayaquil, Av. Carlos Julio Arosemena Km. 1½ vía Daule, Guayaquil, Ecuador
| | - Michelle Tello
- Sistema de Posgrado, Universidad Católica de Santiago de Guayaquil, Av. Carlos Julio Arosemena Km. 1½ vía Daule, Guayaquil, Ecuador
| | | | | | - Wilmer Carvache-Franco
- Facultad de Ciencias Sociales y Humanísticas, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo Km 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador
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Ochoa Pacheco P, Coello-Montecel D, Tello M, Lasio V, Armijos A. How do project managers' competencies impact project success? A systematic literature review. PLoS One 2023; 18:e0295417. [PMID: 38060504 PMCID: PMC10703200 DOI: 10.1371/journal.pone.0295417] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/21/2023] [Indexed: 12/18/2023] Open
Abstract
Despite the existence of systematic literature reviews focused on examining the factors contributing to project success, there remains a scarcity of reviews addressing the relationship between the project managers' competencies and project success. To fill this gap in the literature, this review aimed to evaluate peer-reviewed articles, published between 2010 and 2022, and analyze the impact of project managers' competencies on project success. The Web of Science, Scopus, ScienceDirect, and ProQuest electronic databases were first consulted in September 2021, with an update in August and October 2022. A total of 232 titles were analyzed. Ten articles met the criteria and were fully reviewed. A content analysis and a citation network were carried out to analyze the included articles. The analysis revealed that the existing literature has primarily explored the influence of competencies from the personal and social dimensions, such as leadership, communication, and emotional intelligence, on project success. Conversely, competencies from other dimensions have received less attention in the literature. In addition, this review contributes to the literature by providing a holistic categorization of competencies associated with project success and examining and organizing project success criteria into three dimensions.
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Affiliation(s)
- Paola Ochoa Pacheco
- ESPAE Graduate School of Management, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador
| | - David Coello-Montecel
- ESPAE Graduate School of Management, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador
| | - Michelle Tello
- ESPAE Graduate School of Management, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador
| | - Virginia Lasio
- ESPAE Graduate School of Management, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador
| | - Alfredo Armijos
- ESPAE Graduate School of Management, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador
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3
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Johnson J, Cognetti D, Curry J, Mott F, Kochuparambil S, McDonald D, Fidler M, Vasan N, Razaq M, Tahara M, Biel M, Tello M, Garcia-Guzman M, Sun E, Gillenwater A. Integrated data review evaluating safety, pharmacokinetics (PK) and immunogenicity of RM-1929 photoimmunotherapy (PIT) in subjects with locoregional, recurrent head and neck squamous cell carcinoma (rHNSCC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz252.029] [Citation(s) in RCA: 3] [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: 11/14/2022] Open
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4
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Ferrer P, Tello M, Montecinos L, Tordecilla R, Rodríguez C, Beltrán C, Guzmán MA, Ferrés M, Pérez CM, Afani A. Prevalence of R5 and X4 HIV variants in antiretroviral treatment experienced patients with virologic failure. J Clin Virol 2014; 60:290-4. [PMID: 24793966 DOI: 10.1016/j.jcv.2014.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 04/01/2014] [Accepted: 04/06/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Antiretroviral therapy (ART) inhibits virus replication. Nevertheless, ART has the disadvantage of generate selective resistance and adverse events. Coreceptor antagonists are a family of antiretroviral drugs that are used with the prior knowledge of patients HIV tropism. OBJECTIVES The purpose of this work was to estimate the prevalence of R5 and X4 variants among Chilean patients under antiretroviral therapy and virological failure and investigate variables such as plasma viral load (pVL) and CD4 cell count in the population studied. STUDY DESIGN HIV RNA or proviral DNA was extracted from 454 consecutives patients and tropism testing was performed using a genotypic method performed with Geno2pheno setting a cutoff value for FPR 5.75%. RESULTS Among 454 individuals analyzed, 299 (66%) harbouring exclusively R5 variants. They not displayed a better clinical profile than individuals harbouring X4 strains (22%). For R5 patients the median of pVL and CD4 cell count were 268,000copies/mL, and 223cells/μL respectively. For X4 samples the values were 368,000copies/mL and 214cells/μL [P>0.05]). Only, 53 patients (12%) could not be analyzed and were categorized as non-reportable. CONCLUSIONS The genotypic method confirmed that R5 strains were more prevalent despite the fact that patients were treatment-experienced for several years. The genotypic strategy proved to be a faster and cost-effective option as compared to phenotypic assays. According to our results, two of every three patients under antiretroviral therapy and with virologic failure harbour R5 strains, and may be candidates for use of a CCR5 antagonist.
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Affiliation(s)
- P Ferrer
- Laboratorio de Medicina Molecular, Hospital Clínico Universidad de Chile, Santiago, Chile.
| | - M Tello
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.
| | - L Montecinos
- Laboratorio de Infectología y Virología Molecular, División de Pediatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Marcoleta 391, Santiago, Chile.
| | - R Tordecilla
- Laboratorio de Medicina Molecular, Hospital Clínico Universidad de Chile, Santiago, Chile.
| | - C Rodríguez
- Laboratorio de Medicina Molecular, Hospital Clínico Universidad de Chile, Santiago, Chile.
| | - C Beltrán
- Departamento de Infectología, Complejo Asistencial Barros Luco. Facultad de Medicina, Universidad de Santiago de Chile, and Chilean AIDS Cohort (ChiAC), Santiago, Chile.
| | - M A Guzmán
- Laboratorio de Medicina Molecular, Hospital Clínico Universidad de Chile, Santiago, Chile.
| | - M Ferrés
- Laboratorio de Infectología y Virología Molecular, División de Pediatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Marcoleta 391, Santiago, Chile.
| | - C M Pérez
- Laboratorio de Infectología y Virología Molecular, División de Pediatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Marcoleta 391, Santiago, Chile.
| | - A Afani
- Laboratorio de Medicina Molecular, Hospital Clínico Universidad de Chile, Santiago, Chile.
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Torres-Ayuso P, Tello M, Merida J, Avila-Flores A. 217 Essential Role of Diacylglycerol Kinase Activity in Breast Cancer Growth and Metabolism. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70912-7] [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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Martínez L, Tello M, Díaz M, Román E, Garcia R, Huttel Y. Aspect-ratio and lateral-resolution enhancement in force microscopy by attaching nanoclusters generated by an ion cluster source at the end of a silicon tip. Rev Sci Instrum 2011; 82:023710. [PMID: 21361604 DOI: 10.1063/1.3556788] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
One of the factors that limit the spatial resolution in atomic force microscopy (AFM) is the physical size of the probe. This limitation is particularly severe when the imaged structures are comparable in size to the tip's apex. The resolution in the AFM is usually enhanced by using sharp tips with high aspect ratios. In the present paper we propose an approach to modify AFM tips that consists of depositing nanoclusters on standard silicon tips. We show that the use of those tips leads to atomic force microscopy images of higher aspect ratios and spatial resolution. The present approach has two major properties. It provides higher aspect-ratio images of nanoscale objects and, at the same time, enables to functionalize the AFM tips by depositing nanoparticles with well-controlled chemical composition.
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Affiliation(s)
- L Martínez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
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7
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Lagos R, Tello M, Mercado G, García V, Monasterio O. Antibacterial and antitumorigenic properties of microcin E492, a pore-forming bacteriocin. Curr Pharm Biotechnol 2009; 10:74-85. [PMID: 19149591 DOI: 10.2174/138920109787048643] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microcins are a family of low-molecular weight bacteriocins produced and secreted by Gram-negative bacteria. This review is focused on microcin E492, a pore-forming bacteriocin produced by Klebsiella pneumoniae RYC492 that exerts its antibacterial action on related strains. The steps necessary for the production of active microcin E492 involve post-translational modification with a catechol-type siderophore at the C-terminal and proteolytic processing during export to the extracellular space. This bacteriocin has a modular structure, with a toxic domain at the N-terminal and an uptake domain at the C-terminal of the mature protein. The mechanism by which the C-terminal of microcin E492 is recognized by catecholate siderophore receptors is called the "Trojan horse" strategy, because the C-terminal structure mimics essential bacterial elements, which are recognized by the respective receptors and translocated across the outer membrane to exert antibacterial action. The C-terminal uptake module can be exchanged and used with other toxic domains. Microcin E492 also has a cytotoxic effect on malignant human cell lines. The cytotoxic mechanism is through apoptosis, a desired mechanism for cancer therapy. The ability of microcin E492 to form amyloid-like fibrils constitutes a property that can be exploited in the formulation of this bacteriocin as an antitumoral agent, because these fibrils can behave as stable depots to ensure the sustained release of a biologically active molecule. Alternatively, live bacteria can be used as a continuous source of microcin E492 production in specific tumors.
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Affiliation(s)
- R Lagos
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
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8
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Affiliation(s)
- E Mateu
- Department de Sanitat i Anatomia Animals, Facultat de Veterinària, Edifici V, Universitat Autònama de Barcelona, 08193 Bellaterra, Spain
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9
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de la Torre E, Tello M, Mateu EM, Torre E. Use of biochemical kinetic data to determine strain relatedness among Salmonella enterica subsp. enterica isolates. J Clin Microbiol 2005; 43:5419-24. [PMID: 16272463 PMCID: PMC1287792 DOI: 10.1128/jcm.43.11.5419-5424.2005] [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: 11/20/2022] Open
Abstract
Classical biotyping characterizes strains by creating biotype profiles that consider only positive and negative results for a predefined set of biochemical tests. This method allows Salmonella subspecies to be distinguished but does not allow serotypes and phage types to be distinguished. The objective of this study was to determine the relatedness of isolates belonging to distinct Salmonella enterica subsp. enterica serotypes by using a refined biotyping process that considers the kinetics at which biochemical reactions take place. Using a Vitek GNI+ card for the identification of gram-negative organisms, we determined the biochemical kinetic reactions (28 biochemical tests) of 135 Salmonella enterica subsp. enterica strains of pig origin collected in Spain from 1997 to 2002 (59 Salmonella serotype Typhimurium strains, 25 Salmonella serotype Typhimurium monophasic variant strains, 25 Salmonella serotype Anatum strains, 12 Salmonella serotype Tilburg strains, 7 Salmonella serotype Virchow strains, 6 Salmonella serotype Choleraesuis strains, and 1 Salmonella enterica serotype 4,5,12:-:- strain). The results were expressed as the colorimetric and turbidimetric changes (in percent) and were used to enhance the classical biotype profile by adding kinetic categories. A hierarchical cluster analysis was performed by using the enhanced profiles and resulted in 14 clusters. Six major clusters grouped 94% of all isolates with a similarity of > or =95% within any given cluster, and eight clusters contained a single isolate. The six major clusters grouped not only serotypes of the same type but also phenotypic serotype variations into individual clusters. This suggests that metabolic kinetic reaction data from the biochemical tests commonly used for classic Salmonella enterica subsp. enterica biotyping can possibly be used to determine the relatedness between isolates in an easy and timely manner.
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Affiliation(s)
- E de la Torre
- Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
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10
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Tello M, San Paulo A, Rodríguez TR, Blanco MC, García R. Imaging cobalt nanoparticles by amplitude modulation atomic force microscopy: comparison between low and high amplitude solutions. Ultramicroscopy 2003; 97:171-5. [PMID: 12801669 DOI: 10.1016/s0304-3991(03)00041-x] [Citation(s) in RCA: 12] [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] [Indexed: 10/27/2022]
Abstract
In many situations of interest amplitude modulation AFM is characterized by the coexistence of two solutions with different physical properties. Here, we compare the performance of those solutions in the imaging of cobalt nanoparticles. We show that imaging with the high amplitude solution implies an irreversible deformation of the nanoparticles while repeated imaging with the low solution does not produce noticeable changes in the nanoparticles. Theoretical simulations show that the maximum tip-surface force in the high amplitude solution is about 14nN while in the low amplitude solution is about -4nN. We attribute the differences in the high and low amplitude images to the differences in the exerted forces on the sample.
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Affiliation(s)
- M Tello
- Instituto de Microelectrónica de Madrid, CSIC, Isaac Newton 8, Tres Cantos, 28760, Madrid, Spain
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11
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de la Torre E, Zapata D, Tello M, Mejía W, Frías N, García Peña FJ, Mateu EM, Torre E. Several Salmonella enterica subsp. enterica serotype 4,5,12:i:- phage types isolated from swine samples originate from serotype typhimurium DT U302. J Clin Microbiol 2003; 41:2395-400. [PMID: 12791855 PMCID: PMC156524 DOI: 10.1128/jcm.41.6.2395-2400.2003] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [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: 11/20/2022] Open
Abstract
Pulsed-field gel electrophoresis, plasmid profiling, and phage typing were used to characterize and determine possible genetic relationships between 48 Salmonella enterica subsp. enterica isolates of pig origin collected in Catalonia, Spain, from 1998 to 2000. The strains were grouped into 23 multidrug-resistant fljB-lacking S. enterica serovar 4,5,12:i:- isolates, 24 S. enterica serovar Typhimurium isolates, and 1 S. enterica serovar 4,5,12:-:- isolate. After combining the XbaI and BlnI macrorestriction profiles (XB profile), we observed 29 distinct subtypes which were grouped into seven main patterns. All 23 of the 4,5,12:i:- serovar strains and 10 serovar Typhimurium isolates were found to have pattern AR, and similarities of >78% were detected among the subtypes. Three of the serovar Typhimurium DT U302 strains (strains T3, T4, and T8) were included in the same 4,5,12:i:- serovar cluster and shared a plasmid profile (profile I) and a pattern of multidrug resistance (resistance to ampicillin, chloramphenicol, streptomycin, sulfonamide, tetracycline, gentamicin, and trimethoprim-sulfamethoxazole) commonly found in monophasic isolates. This led us to the conclusion that strains of the S. enterica 4,5,12:i:- serovar might have originated from an S. enterica serovar Typhimurium DT U302 strain.
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Affiliation(s)
- E de la Torre
- Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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12
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Hendricks JC, Williams JA, Panckeri K, Kirk D, Tello M, Yin JC, Sehgal A. A non-circadian role for cAMP signaling and CREB activity in Drosophila rest homeostasis. Nat Neurosci 2001; 4:1108-15. [PMID: 11687816 DOI: 10.1038/nn743] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the fruit fly, Drosophila melanogaster, rest shares features with mammalian sleep, including prolonged immobility, decreased sensory responsiveness and a homeostatic rebound after deprivation. To understand the molecular regulation of sleep-like rest, we investigated the involvement of a candidate gene, cAMP response-element binding protein (CREB). The duration of rest was inversely related to cAMP signaling and CREB activity. Acutely blocking CREB activity in transgenic flies did not affect the clock, but increased rest rebound. CREB mutants also had a prolonged and increased homeostatic rebound. In wild types, in vivo CREB activity increased after rest deprivation and remained elevated for a 72-hour recovery period. These data indicate that cAMP signaling has a non-circadian role in waking and rest homeostasis in Drosophila.
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Affiliation(s)
- J C Hendricks
- Center for Sleep and Respiratory Neurobiology, University of Pennsylvania, 991 Maloney Building, 3600 Spruce St, Philadelphia, Pennsylvania, 19104 USA.
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13
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Tello M, Seelenfreund D, Lobos S, Gaskell J, Cullen D, Vicuña R. Isolation and characterization of homokaryotic strains from the ligninolytic basidiomycete Ceriporiopsis subvermispora. FEMS Microbiol Lett 2001; 199:91-6. [PMID: 11356573 DOI: 10.1111/j.1574-6968.2001.tb10656.x] [Citation(s) in RCA: 14] [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: 11/28/2022] Open
Abstract
Genetic analyses of the lignin-degrading fungus Ceriporiopsis subvermispora is complicated by a dikaryotic nuclear condition and the absence of spore forms. Previous investigations had identified a family of closely related sequences encoding manganese peroxidase (MnP), but the relationship between genes and allelic variants could not be experimentally established. Addressing this issue, homokaryotic derivatives of C. subvermipora strain FP105752 were isolated from regenerated protoplasts. Designated CsA and CsB, their homokaryotic nature was established by polymerase chain reaction amplification and sequence analysis of the allelic variants of three MnP genes. Isoelectrofocusing revealed fewer MnP isoenzymes in filtrates of homokaryon cultures relative to the parental strain. The homokaryotic strains will simplify genetic analyses, particularly the identification of new genes.
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Affiliation(s)
- M Tello
- Departamento de Bioquímica y Biología Molecular , Faculdade de Ciencias Químicas y Farmacéuticas, Universidade de Chile, Santiago
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14
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Niño VM, Daza CE, Tello M. A criteria to classify biological activity of benzimidazoles from a model of structural similarity. J Chem Inf Comput Sci 2001; 41:495-504. [PMID: 11410023 DOI: 10.1021/ci000071h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have classified a set of 250 benzimidazoles using a criterion of structural similarity. This criterion has led us to several clusters, which keep a close relationship between the molecules belonging to each one of them and their pharmacological activity. To study the structural similarity we have built a mathematical space where chemical structures are pictured as vectors. A set of well-chosen descriptors was used as variables. These descriptors arise from graph theoretical studies and quantum mechanical calculations. Principal components analysis was employed to find the suitable dimension for the space. Finally, cluster analysis was performed to classify the set of molecules by similarity. A Euclidean metric was used as a similarity coefficient.
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Affiliation(s)
- V M Niño
- Grupo de Química Teórica, Universidad Nacional de Colombia, Santa Fe de Bogotá, D.C., Colombia
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15
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Tello M, Corsini G, Larrondo LF, Salas L, Lobos S, Vicuña R. Characterization of three new manganese peroxidase genes from the ligninolytic basidiomycete Ceriporiopsis subvermispora. Biochim Biophys Acta 2000; 1490:137-44. [PMID: 10786628 DOI: 10.1016/s0167-4781(99)00227-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three new genes (Cs-mnp2A, Cs-mnp2B and Cs-mnp3) coding for manganese-dependent peroxidase (MnP) have been identified in the white-rot basidiomycete Ceriporiopsis subvermispora. The mature proteins contain 366 (MnP2A and MnP2B) and 364 (MnP3) amino acids, which are preceded by leader sequences of 21 and 24 amino acids, respectively. Cs-mnp2A and Cs-mnp2B appear to be alleles, since the corresponding protein sequences differ in only five residues. The upstream region of Cs-mnp2B contains a TATA box, AP-1 and AP-2 sites, as well as sites for transcription regulation by metals (two), cAMP (two) and xenobiotics (one). Some of these elements are also found in the regulatory region of Cs-MnP3. Transcription of Cs-mnp2A and Cs-mnp2B, but not that of Cs-mnp3, is activated by manganese.
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Affiliation(s)
- M Tello
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago
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16
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Ramírez-Mayans J, Cervantes-Bustamante R, Zárate-Mondragón F, Mata-Rivera N, Tello M, Navarrete N, de Martínez CS. Hepatitis C virus antibodies in a Mexican population. Pediatr Infect Dis J 1998; 17:169-70. [PMID: 9493820 DOI: 10.1097/00006454-199802000-00021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- J Ramírez-Mayans
- Department of Gastroenterology, Instituto Nacional de Pediatría, Mexico City, Mexico
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Vilafranca M, Tello M, Pumarola M, Domingo M. Neural cells from dogs with spontaneous distemper encephalitis express class II major histocompatibility complex molecules. J Comp Pathol 1996; 114:43-50. [PMID: 8729079 DOI: 10.1016/s0021-9975(96)80061-2] [Citation(s) in RCA: 2] [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: 02/01/2023]
Abstract
Expression of class II major histocompatibility complex (MHC) molecules by non-immune cells (e.g., parenchymal cells) leads to the presentation of self-antigens, and may have a role in the pathogenesis of many diseases mediated by autoimmunity. Such diseases, characterized by demyelination of the central nervous system and expression of class II MHC molecules on neural cells, include multiple sclerosis, experimental allergic encephalitis and Theiler's murine encephalomyelitis virus infection. Canine distemper encephalitis probably does not have an autoimmune character, but it shares many similarities with the aforementioned diseases. For this reason, the expression of class II MHC molecules in the brains of dogs with canine distemper encephalitis was investigated immunohistochemically. The results presented here demonstrate that canine microglia and astrocytes "upregulate" class II MHC expression in cases of encephalitis associated with chronic canine distemper.
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Affiliation(s)
- M Vilafranca
- Department of Animal Pathology, Veterinary Faculty, Autonomous University of Barcelona, Bellaterra, Spain
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18
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Torre E, Tello M. Factors influencing fecal shedding of Campylobacter jejuni in dogs without diarrhea. Am J Vet Res 1993; 54:260-2. [PMID: 8430936] [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: 01/30/2023]
Abstract
Rectal swab specimens were collected from 362 apparently healthy dogs of different origin, age, breed, and sex. Specimens were obtained in summer, autumn, and winter. Ninety-five thermophilic Campylobacter spp were isolated: C jejuni biotype I, n = 57, C jejuni biotype II, n = 1, C coli, n = 36, and C laridis, n = 1. Biotypes of C jejuni recovered were the same as those associated with Campylobacter-induced enteritis in human beings. Prevalence of C jejuni was significantly (P < 0.05) greater: in dogs < 6 months old than in adult dogs; in dogs living under high density and cohabitation housing conditions for long periods; and in autumn.
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Affiliation(s)
- E Torre
- Department of Patologia i Produccions Animals, Facultat de Veterinaria, Universitat Autonoma de Barcelona, Bellaterra, Spain
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Hakmi H, Quero Jiménez M, González Diéquez C, Tello M, Maitre Azcárate MJ. [Hepatic hemangioendothelioma with interauricular communication]. An Esp Pediatr 1983; 18:498-504. [PMID: 6625371] [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: 01/21/2023]
Abstract
A case of hepatic hemangioendothelioma in an infant of 2 1/2 months of age is presented. This case showed clinical features of this malformation: cardiac failure, severe hepatomegaly and cutaneous hemangiomata. The cardiac failure was complicated by the presence of an atrial septal defect. This symptomatology persisted after the surgical closure of the cardiac defect. The control of cardiac failure was only possible by using high doses of metil-prednisolone (2 mg/kg/day). The scheme of management in the treatment with steroids was revised, and the good results obtained in this case and in other series recorded. The use of surgical techniques (hepatic artery ligation or lobectomy), and radiotherapy, is relegated to a secondary plane by these findings.
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