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Azcondo MT, Yuste M, Pérez-Flores JC, Muñoz-Gil D, García-Martín S, Muñoz-Noval A, Orench IP, García-Alvarado F, Amador U. Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr 2 CoNb 1-x Ti x O 6-δ (0≤x≤1) as Cathode Materials for Solid Oxide Fuel Cells. ChemSusChem 2017; 10:2978-2989. [PMID: 28594114 DOI: 10.1002/cssc.201700648] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 05/22/2017] [Indexed: 06/07/2023]
Abstract
The perovskite series Sr2 CoNb1-x Tix O6-δ (0≤x≤1) was investigated in the full compositional range to assess its potential as cathode material for solid oxide fuel cell (SOFC). The variation of transport properties and thus, the area specific resistances (ASR) are explained by a detailed investigation of the defect chemistry. Increasing the titanium content from x=0-1 produces both oxidation of Co3+ to Co4+ (from 0 up to 40 %) and oxygen vacancies (from 6.0 to 5.7 oxygen atom/formula unit), although each charge compensation mechanism predominates in different compositional ranges. Neutron diffraction reveals that samples with high Ti-contents lose a significant amount of oxygen upon heating above 600 K. Oxygen is partially recovered upon cooling as the oxygen release and uptake show noticeably different kinetics. The complex defect chemistry of these compounds, together with the compositional changes upon heating/cooling cycles and atmospheres, produce a complicated behavior of electrical conductivity. Cathodes containing Sr2 CoTiO6-δ display low ASR values, 0,13 Ω cm2 at 973 K, comparable to those of the best compounds reported so far, being a very promising cathode material for SOFC.
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Affiliation(s)
- María Teresa Azcondo
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad CEU San Pablo, Boadilla del Monte, 28668, Madrid, Spain
| | - Mercedes Yuste
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad CEU San Pablo, Boadilla del Monte, 28668, Madrid, Spain
| | - Juan Carlos Pérez-Flores
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad CEU San Pablo, Boadilla del Monte, 28668, Madrid, Spain
| | - Daniel Muñoz-Gil
- Departamento de Química Inorgánica, Facultad Ciencias Químicas, Universidad Complutense, 28040, Madrid, Spain
| | - Susana García-Martín
- Departamento de Química Inorgánica, Facultad Ciencias Químicas, Universidad Complutense, 28040, Madrid, Spain
| | - Alvaro Muñoz-Noval
- Instituto de Ciencia de Materiales de Madrid-ICMM/CSIC, Madrid, Spain and SpLine Spanish CRG Beamline at the ESRF, Grenoble, France
| | - Inés Puente Orench
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza and Institut Laue-Langevin, CS20156, 38042, Grenoble Cedex 9, France
| | - Flaviano García-Alvarado
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad CEU San Pablo, Boadilla del Monte, 28668, Madrid, Spain
| | - Ulises Amador
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad CEU San Pablo, Boadilla del Monte, 28668, Madrid, Spain
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Álvarez B, Escalona Z, Uenishi H, Toki D, Revilla C, Yuste M, Del Moral MG, Alonso F, Ezquerra A, Domínguez J. Molecular and functional characterization of porcine Siglec-3/CD33 and analysis of its expression in blood and tissues. Dev Comp Immunol 2015; 51:238-250. [PMID: 25892023 DOI: 10.1016/j.dci.2015.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 04/08/2015] [Accepted: 04/09/2015] [Indexed: 06/04/2023]
Abstract
A cDNA clone encoding a 380 a-a type 1 transmembrane protein with homology to human Siglec-3/CD33 was obtained from a swine small intestine library. An analysis of protein sequence identified two immunoglobulin-like domains, a transmembrane region, and a carboxi-terminal tail with two tyrosine-based signalling motifs. Binding assays of Siglec-3 transfected CHO cells to polyacrylamide glycoconjugates showed a preference for α2-6-linked sialic acids. Using mAbs raised against a fragment containing the two Ig-like domains, porcine Siglec-3 was found to be expressed on monocytes and granulocytes, and their bone marrow precursors. It was also detected in lymph node, splenic and alveolar macrophages. MAbs immunoprecipitated, from granulocyte lysates, a protein of 51-60 kDa under both non-reducing and reducing conditions. MAbs were also used to analyse functional activity of Siglec-3 on bone marrow and blood cells. Engagement of Siglec-3 by mAb had no apparent effect on cell proliferation or cytokine production.
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Affiliation(s)
- B Álvarez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - Z Escalona
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - H Uenishi
- National Institute of Agrobiological Sciences (NIAS), 2 Ikenodai, Tsukuba, Ibaraki 305-8602, Japan
| | - D Toki
- Institute of Japan Association for Techno-innovation in Agriculture, Forestry and Fisheries, 446-1 Ippaizuka, Kamiyokoba, Tsukuba, Ibaraki 305-0854, Japan
| | - C Revilla
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - M Yuste
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - M Gómez Del Moral
- Dpto. de Biología Celular y de Inmunología, Facultad de Medicina, Universidad Complutense de Madrid, Avda. Complutense s/n, Madrid 28040, Spain
| | - F Alonso
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - A Ezquerra
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain
| | - J Domínguez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, Madrid 28040, Spain.
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Escalona Z, Álvarez B, Uenishi H, Toki D, Yuste M, Revilla C, del Moral MG, Alonso F, Ezquerra A, Domínguez J. Molecular characterization of porcine Siglec-10 and analysis of its expression in blood and tissues. Dev Comp Immunol 2015; 48:116-123. [PMID: 25280627 DOI: 10.1016/j.dci.2014.09.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 09/26/2014] [Accepted: 09/26/2014] [Indexed: 06/03/2023]
Abstract
Siglecs are sialic acid binding Ig-like proteins involved in the control of leukocyte responses. In this study we describe the characterization of a porcine orthologue of Siglec-10. A cDNA clone was obtained from a porcine library which encodes a protein with sequence homology to human Siglec-10. This cDNA codes for a type I transmembrane protein containing four Ig-like domains, a transmembrane region, and a cytoplasmic tail with three tyrosine-based motifs, including a membrane-proximal Grb2-binding motif, and two ITIM motifs. When expressed on transfected cells, porcine Siglec-10 was able to bind red blood cells in a sialic acid-dependent manner. Monoclonal antibodies were developed against this protein and used to examine its cell and tissue distribution in the pig. Siglec-10 was found to be expressed on blood B cells and B cell areas of the spleen and lymph nodes. A weak expression was also detected on monocytes.
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Affiliation(s)
- Z Escalona
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - B Álvarez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - H Uenishi
- National Institute of Agrobiological Sciences (NIAS), 2 Ikenodai, Tsukuba, Ibaraki 305-8602, Japan
| | - D Toki
- Institute of Japan Association for Techno-innovation in Agriculture, Forestry and Fisheries, 446-1 Ippaizuka, Kamiyokoba, Tsukuba, Ibaraki 305-0854, Japan
| | - M Yuste
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - C Revilla
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - M Gómez del Moral
- Dpto. de Biología Celular y de Inmunología, Facultad de Medicina, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain
| | - F Alonso
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - A Ezquerra
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - J Domínguez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain.
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Escalona Z, Álvarez B, Uenishi H, Toki D, Yuste M, Revilla C, Gómez del Moral M, Alonso F, Ezquerra A, Domínguez J. Molecular characterization and expression of porcine Siglec-5. Dev Comp Immunol 2014; 44:206-216. [PMID: 24382335 DOI: 10.1016/j.dci.2013.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 12/20/2013] [Accepted: 12/21/2013] [Indexed: 06/03/2023]
Abstract
In this study we describe the characterization of the porcine orthologue of Siglec-5. A cDNa clone was obtained from a porcine cDNa library derived from swine small intestine which encodes a 555 a-a type 1 transmembrane protein with sequence homology to human Siglec-5. This protein consists of four Ig-like domains, a transmembrane region, and a cytoplasmic tail with two tyrosine-based signalling motifs. When expressed as a recombinant protein fused to the Fc region of human IgG1, porcine Siglec-5 was able to bind porcine red blood cells in a sialic acid-dependent manner. Monoclonal antibodies (mAb) were developed against porcine Siglec-5 and used to analyse its expression in bone marrow and blood cells, and lymphoid tissues. Porcine Siglec-5 expression was mainly restricted to myelomonocytic cells and their precursors, being detected also, although at low levels, on plasmacytoid dendritic cells and B lymphocytes. In lymphoid tissues, ellipsoids of the spleen and subcapsular and medullar sinuses of lymph nodes were positive for Siglec-5. These mAbs were able to precipitate, from granulocyte lysates, a protein of approximately 85 kDa under non-reducing conditions, indicating that porcine Siglec-5 is expressed as a monomer in the plasma membrane.
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Affiliation(s)
- Z Escalona
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - B Álvarez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - H Uenishi
- National Institute of Agrobiological Sciences (NIAS), 2 Ikenodai, Tsukuba, Ibaraki 305-8602, Japan
| | - D Toki
- National Institute of Agrobiological Sciences (NIAS), 2 Ikenodai, Tsukuba, Ibaraki 305-8602, Japan
| | - M Yuste
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - C Revilla
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - M Gómez del Moral
- Dpto. de Biología Celular, Facultad de Medicina, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain
| | - F Alonso
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - A Ezquerra
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain
| | - J Domínguez
- Dpto. de Biotecnología, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra de la Coruña Km 7.5, 28040 Madrid, Spain.
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Martín MA, Ollé G, Pellejero JA, Torruella R, Yuste M, Pou N. [Comparison of the post-surgical analgesic effectiveness of tibial (at internal malleolus level) and common peroneal nerve block with infiltration of the surgical wound in Outpatient Surgery of the hallux valgus]. ACTA ACUST UNITED AC 2012; 59:197-203. [PMID: 22551481 DOI: 10.1016/j.redar.2012.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 02/10/2012] [Indexed: 10/28/2022]
Abstract
INTRODUCTION To compare the post-operative analgesic effectiveness of blocking the posterior tibial and the common peroneal nerves against that of wound infiltration using local anaesthesia, in ambulatory surgery of hallux valgus. MATERIAL AND METHODS A randomised clinical study was conducted on ambulatory patients subjected to Hallux valgus surgery, assigned into two groups: BNP: peripheral nerve blockage: posterior tibial and the common peroneal with 80mg of lidocaine, 100mg of mepivacaine and 25mg of levobupivacaine. INF: surgical wound infiltration with 50mg of levobupivacaine. The following aspects were evaluated during the first 24h after surgery: pain level using a visual analogue scale (VAS), the need to use rescue analgesia, and the incidence of secondary effects and readmissions due to pain. RESULTS A total of 111 Patients were included (55 BNP, 56 INF), 93 per cent were women and the average age was 59 (SD10) years. The average VAS score in the first 24h was 2.9 (SD1.7) for the BNP group and 2.7 (SD1.6) for the INF group (P=.62). Less than half (42%) of patients needed rescue anaesthetic with tramadol, with no significant differences between the groups (P=.28). A 33 per cent had secondary postoperative effects were observed in 33% of cases, with a significant difference between INF and BNP (P=.01). One patient from INF group, had to be admitted for pain. CONCLUSIONS The peripheral nerve block and wound infiltration are valid techniques for controlling pain at home after ambulatory surgery of hallux valgus, therefore both methods appear to be safe in an outpatient setting.
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Affiliation(s)
- M A Martín
- Servicio de Anestesiología y Reanimación, Hospital de Mataró, Mataró, Barcelona, España
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Yuste M, Pérez-Flores JC, de Paz JR, Azcondo MT, García-Alvarado F, Amador U. New perovskite materials of the La2−xSrxCoTiO6 series. Dalton Trans 2011; 40:7908-15. [DOI: 10.1039/c1dt10196j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
In this study, the antimicrobial activity of a commercial beta-glucanase preparation against wine spoilage yeasts such as Cryptococcus albidus, Dekkera bruxellensis, Pichia membranifaciens, Saccharomyces cerevisiae, Zygosaccharomyces bailii, and Zygosaccharomyces bisporus has been evaluated. Yeast species tested showed different sensitivities to the enzyme preparation. In vitro assays in laboratory medium (GPY) showed inhibition by the beta-glucanase preparation of D. bruxellensis and Z. bailii growth with IC(50) and MIC values approximately 3 to 4-fold greater than the recommended dose for improving wine filtration. Wine spoilage experiments showed antimicrobial action against D. bruxellensis and Z. bailii although with reduced effectiveness to that showed in laboratory medium. Under the conditions tested, the addition of beta-glucanase did not affect wine enological parameters. Our data suggest the potential use of beta-glucanases as antimicrobial agents in wine and indicate that the application of antimicrobial enzymes for yeast spoilage control deserves further investigation.
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Affiliation(s)
- M Enrique
- Dept. de Biotecnología de Alimentos, Inst. de Agroquímica y Tecnología de Alimentos, Consejo Superior de Investigaciones Científicas (CSIC), Burjassot, Valencia, Spain
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Abstract
Carcinoid syndrome is a rare disorder caused when elevated levels of vasoactive substances secreted by a carcinoid tumor fail to be metabolized by the liver. This can occur for a variety of reasons including metastatic invasion of the organ. Carcinoid syndrome results in elevated levels of 5-hydroxyindoleacetic acid in the urine. Clinical manifestations include: flushing, diarrhea, bronchospasm, and heart failure. We describe a patient with carcinoid syndrome and hepatic metastases, in whom the key symptom of persistent facial edema resulted in conspicuous leonine facies; there was a partial response to treatment with oral isotretinoin and intramuscular lanreotide. Differential diagnosis was made with other conditions causing facial edema. A review is performed of the various skin manifestations of carcinoid syndrome, highlighting their role in the early diagnosis and treatment of the disorder.
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Affiliation(s)
- M Yuste
- Servicio de Dermatología, Hospital Universitario de Salamanca, Salamanca, España.
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Yuste M, Romo A, Nieto G, Unamuno P. Facies leonina en el síndrome carcinoide. Actas Dermo-Sifiliográficas 2010. [DOI: 10.1016/j.ad.2010.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Yuste M, Romo A, de Unamuno P. [Antibiotic prophylaxis in dermatologic surgery]. Actas Dermosifiliogr 2008; 99:683-689. [PMID: 19087806] [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] Open
Abstract
This article discusses factors to take into consideration for the rational use of antibiotics to prevent postoperative infection in dermatologic surgery. The treatment of choice is described.
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Affiliation(s)
- M Yuste
- Servicio de Dermatología, Hospital Universitario de Salamanca, España.
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Yuste M, De La Fuente R, Ruiz-Santa-Quiteria JA, Cid D, Orden JA. Detection of the astA (EAST1) Gene in Attaching and Effacing Escherichia coli from Ruminants. ACTA ACUST UNITED AC 2006; 53:75-7. [PMID: 16626403 DOI: 10.1111/j.1439-0450.2006.00919.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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]
Abstract
A total of 206 attaching and effacing Escherichia coli strains from ruminants were analysed for the presence of the astA (EAST1) and bfpA genes. None of these strains was bfpA-positive. The percentage of enteropathogenic E. coli (EPEC) strains astA-positive found in healthy cattle (15.6%) suggests that this animal species may be a significant reservoir of atypical EPEC potentially pathogenic for humans.
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Affiliation(s)
- M Yuste
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain
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Braña MF, Gradillas A, Gómez A, Acero N, Llinares F, Muñoz-Mingarro D, Abradelo C, Rey-Stolle F, Yuste M, Campos J, Gallo MA, Espinosa A. Synthesis, Biological Activity, and Quantitative Structure−Activity Relationship Study of Azanaphthalimide and Arylnaphthalimide Derivatives. J Med Chem 2004; 47:2236-42. [PMID: 15084122 DOI: 10.1021/jm0310784] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [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: 11/30/2022]
Abstract
A series of quinoline derivatives as aza analogues of the naphthalene chromophore and a series of "nonfused" tricyclic aromatic systems, in particular 5-arylquinolines and 5- or 6-aryl and heteroaryl naphthalene systems, were synthesized and evaluated for growth-inhibitory properties in several human cell lines. The analysis of quantitative structure-antitumor activity relationships for the growth-inhibitory properties is also reported. Findings suggest that these compounds may not express their cytotoxicity via interaction on DNA.
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Affiliation(s)
- Miguel F Braña
- Departamento de Ciencias Químicas, Universidad San Pablo CEU, Urbanización Montepríncipe, 28668-Boadilla del Monte, Madrid, Spain.
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Braña MF, Cacho M, García MA, de Pascual-Teresa B, Ramos A, Domínguez MT, Pozuelo JM, Abradelo C, Rey-Stolle MF, Yuste M, Báñez-Coronel M, Lacal JC. New Analogues of Amonafide and Elinafide, Containing Aromatic Heterocycles: Synthesis, Antitumor Activity, Molecular Modeling, and DNA Binding Properties. J Med Chem 2004; 47:1391-9. [PMID: 14998328 DOI: 10.1021/jm0308850] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.9] [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: 11/28/2022]
Abstract
Amonafide- and elinafide-related mono and bisintercalators, modified by the introduction of a pi-excedent furan or thiophene ring fused to the naphthalimide moiety, have been synthesized. These compounds have shown an interesting antitumor profile. The best compound, 9, was 2.5-fold more potent than elinafide against human colon carcinoma cells (HT-29). Molecular dynamic simulations and physicochemical experiments have demonstrated that these compounds are capable of forming stable DNA complexes. These results, together with those previously reported by us for imidazo- and pyrazinonaphthalimide analogues, have prompted us to propose that the DNA binding process does not depend on the electronic nature of the fused heterocycle.
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Affiliation(s)
- Miguel F Braña
- Departamentos de Ciencias Químicas, Facultad de Ciencias Experimentales y de la Salud, Universidad San Pablo CEU, Urbanización Montepríncipe, 28668-Boadilla del Monte, Madrid, Spain.
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Orden JA, Yuste M, Cid D, Piacesi T, Martínez S, Ruiz-Santa-Quiteria JA, De la Fuente R. Typing of the eae and espB genes of attaching and effacing Escherichia coli isolates from ruminants. Vet Microbiol 2004; 96:203-15. [PMID: 14519337 DOI: 10.1016/s0378-1135(03)00238-4] [Citation(s) in RCA: 24] [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: 11/23/2022]
Abstract
The types of the eae and espB genes of 178 attaching and effacing Escherichia coli (AEEC) strains isolated from diarrhoeic and healthy ruminants were investigated by PCR. Six types of the eae gene: beta (beta), gamma1 (gamma-1), gamma2 (gamma-2), epsilon (epsilon), zeta (zeta) and iota (iota), and three types of the espB gene: alpha, beta and gamma were identified in the strains studied. Moreover, three strains were negative to all the types of the eae gene tested. The types beta and gamma2 in healthy cattle, beta, gamma2 and epsilon in healthy sheep and goats, and beta in diarrhoeic calves, lambs and goat kids were the most frequent types of the eae gene among the strains studied. Although the eaebeta gene was the most prevalent among AEEC from healthy and diarrhoeic ruminants, the percentages of AEEC strains with this type found in this study in diarrhoeic animals (66.7-100%) were higher than those found in healthy animals (33.3-40.6%). Thus, these data suggest that AEEC strains with the eaebeta gene are associated with neonatal diarrhoea in ruminants. The eaegamma1, eaezeta and eaeiota genes were found in low percentages in the strains studied (4.5, 2.8 and 7.3%, respectively). All the types of the eae gene, except the type iota, showed a close correlation with the types of the espB gene: the eaebeta and eae epsilon genes with the espBbeta gene, the eaegamma2 and eaezeta genes with the espBalpha gene and the eaegamma1 gene with the espBgamma gene.
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Affiliation(s)
- J A Orden
- Departamento de Patología Animal I (Sanidad Animal), Facultad de Veterinaria, Universidad Complutense 28040, Madrid, Spain
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Braña MF, Cacho M, Ramos A, Domínguez MT, Pozuelo JM, Abradelo C, Rey-Stolle MF, Yuste M, Carrasco C, Bailly C. Synthesis, biological evaluation and DNA binding properties of novel mono and bisnaphthalimides. Org Biomol Chem 2003; 1:648-54. [PMID: 12929451 DOI: 10.1039/b209042b] [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: 11/21/2022]
Abstract
A novel series of mono and bisnaphthalimides was synthesized and their antiproliferative activities were evaluated against three tumor cell lines. Bisnaphthalimides 3 and 4, bearing a pyrazine ring fused to the naphthalimide system, showed activities in the order of 10(-8) microM, similar to elinafide. DNA binding properties and the ability to induce DNA damage were studied for some of the most active compounds.
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Affiliation(s)
- Miguel F Braña
- Departamento de CC. Químicas, Facultad de CC. Experimentales y de la Salud, Universidad San Pablo CEU, Urb. Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
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Braña MF, Cacho M, García MA, de Pascual-Teresa B, Ramos A, Acero N, Llinares F, Muñoz-Mingarro D, Abradelo C, Rey-Stolle MF, Yuste M. Synthesis, antitumor activity, molecular modeling, and DNA binding properties of a new series of imidazonaphthalimides. J Med Chem 2002; 45:5813-6. [PMID: 12477366 DOI: 10.1021/jm020950q] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of mono and bisintercalators based on the 5,8-dihydrobenz[de]imidazo[4,5-g]isoquinoline-4,6-dione system were synthesized and evaluated for growth inhibitory properties in several human cell lines. All target compounds showed activity in the micromolar range. Representative compounds were evaluated using UV--vis spectroscopy and viscosimetric determinations, showing that they behave as DNA intercalators. Molecular modeling techniques were used in order to rationalize the moderate activity observed for bisnaphthalimides.
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Affiliation(s)
- Miguel F Braña
- Departamentos de Química Orgánica y Farmacéutica, Facultad de Ciencias Experimentales y de la Salud, Universidad San Pablo CEU, Urbanización Montepríncipe, 28668-Boadilla del Monte, Madrid, Spain.
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18
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Selva O'Callaghan A, Yuste M, Armadansa L, Almirante Gragerab B, San José Laporte A, Vilardell Tarrés M. [The risk factors for Clostridium difficile infection in elderly patients. A case-control study]. Med Clin (Barc) 2000; 115:499-500. [PMID: 11093871 DOI: 10.1016/s0025-7753(00)71604-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 10/27/2022]
Abstract
BACKGROUND To study the main risk factors associated with Clostridium difficile infection in a geriatric unit. PATIENTS AND METHOD Retrospective case-control study. RESULTS In a multivariate analysis, tube feeding (OR = 6.73; IC 95%, 1.01-45.35) and length of antibiotic therapy (OR = 1.15; IC, 95% 1.01-1.28) were independent variables which associated with C. difficile infection. CONCLUSIONS Antibiotic treatment, tube feeding and fragility are associated with C. difficile infection.
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Affiliation(s)
- A Selva O'Callaghan
- Servicio de Medicina Interna, Hospital General Vall d'Hebron, Universitat Autònoma de Barcelona.
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Abstract
The budding yeast lyt1 mutation causes cell lysis. We report here that lyt1 is an allele of cdc15, a gene which encodes a protein kinase that functions late in the cell cycle. Neither cdc15-1 nor cdc15-lyt1 strains are able to septate at 37 degreesC, even though they may manage to rebud. Cells lyse after a shmoo-like projection appears at the distal pole of the daughter cell. Actin polarizes towards the distal pole but the septins remain at the mother-daughter neck. This morphogenetic response reflects entry into a new round of the cell cycle: the preference for polarization from the distal pole was lost in bud1 cdc15 double mutants; double cdc15-lyt1 cdc28-4 mutants, defective for START, did not develop apical projections and apical polarization was accompanied by DNA replication. The same phenomena were caused by mutations in the genes CDC14, DBF2, and TEM1, which are functionally related to CDC15. Apical polarization was delayed in cdc15 mutants as compared with budding in control cells and this delay was abolished in a septin mutant. Our results suggest that the delayed M/G1 transition in cdc15 mutants is due to a septin-dependent checkpoint that couples initiation of the cell cycle to the completion of cytokinesis.
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Affiliation(s)
- J Jiménez
- Departamento de Microbiología II, Facultad de Farmacia
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Abstract
Cutaneous lymphadenoma is an uncommon epithelial neoplasm with a controverted adnexal differentiation. We report a typical case of cutaneous lymphadenoma that developed on the left cheek of a 18-year-old woman. Histologically, the neoplasm consisted of lobules of basaloid cells with a peripheral palisading array and filled with a lymphocyte-predmoninant mixed cellular population. Numerous intralobular cells with ample amphopilic cytoplasm, large vesicular nuclei, and prominent nucleoli also were noticed. Immunohistochemical study showed labeling of these Reed-Sternberg-like large cells by antibodies against CD30 antigen. Our findings suggest that cutaneous lymphadenoma is a poorly differentiated adnexal neoplasm, probably trichoblastoma-related, where a singular interaction with several immune cells is established, including activated large lymphocytes analogous to those malignantly proliferating in Hodgkin's disease.
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Affiliation(s)
- E Rodríguez-Díaz
- Seccion de Dermatologia, Hospital Nuestra Señora de Sonsóles, Avila, España
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Abstract
We report a case of abscess formation after epidural analgesia, a rare complication that developed in our patient 13 days after placement of a thoracic epidural catheter for patient controlled analgesia. Culture of the pus grew methicillin-resistant Staphylococcus aureus. Although early diagnosis and rapid management have been reported to yield a satisfactory outcome, the case we describe ended in severe sequelae.
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Affiliation(s)
- M Yuste
- Department of Anaesthesiology, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
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Chaves F, González A, Aramendi T, Yuste M, Galván C. [Erythematopustular plaque of 7 month's duration]. Enferm Infecc Microbiol Clin 1991; 9:509-10. [PMID: 1805956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- F Chaves
- Servicio de Microbiología, Hospital Nuestra Señora de Sónsoles, Madrid
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