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Ezcurra I, Puente Á, Cuadrado A, Tamayo I, Iruzubieta P, Arias-Loste MT, González FJ, Pellón R, Sánchez S, Crespo J, Acebo M, López-Hoyos M, Pérez R, Cuesta A, Antón Á, Echavarría V, Fábrega E, Crespo J, Fortea JI. No evidence of association between inherited thrombophilia and increased risk of liver fibrosis. United European Gastroenterol J 2023; 11:1010-1020. [PMID: 38015591 PMCID: PMC10720682 DOI: 10.1002/ueg2.12500] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/23/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND Preliminary evidence suggests that inherited hypercoagulable disorders can lead to an increased risk of significant liver fibrosis. OBJECTIVE We aimed to investigate the prevalence of significant fibrosis in patients with inherited thrombophilia, assessed by using liver stiffness (LS), and to compare this prevalence to that found in a large population-based cohort from the same region. METHODS This was a single-center, cross-sectional study. A complete laboratory analysis for liver disease, LS by transient elastography and an abdominal ultrasound were performed in patients with inherited thrombophilia diagnosed between May 2013-February 2017. These patients were propensity score matched (ratio 1:4) with a population-based cohort from the same region (PREVHEP-ETHON study; NCT02749864; N = 5988). RESULTS Of 241 patients with inherited thrombophilia, eight patients (3.3%) had significant fibrosis (LS ≥8 kPa). All of them had risk factors for liver disease and met diagnostic criteria for different liver diseases. After matching 221 patients with thrombophilia with 884 patients of the PREVHEP-ETHON cohort, the prevalence of significant fibrosis was similar between both cohorts (1.8% vs. 3.6%, p = 0.488). Multivariate analysis showed that age and liver disease risk factors, but not belonging to the thrombophilia cohort, were associated with the presence of significant fibrosis. The magnitude of the increased risk of significant fibrosis in patients with risk factors for liver disease was also similar in both cohorts. CONCLUSIONS Our findings do not provide evidence supporting an association between inherited thrombophilia and an increased risk of significant liver fibrosis, independent of the presence of liver-related causes of fibrosis.
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Affiliation(s)
- Iranzu Ezcurra
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Ángela Puente
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Antonio Cuadrado
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Ibai Tamayo
- Navarrabiomed, Health Research Institute, Pamplona, Spain
| | - Paula Iruzubieta
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - María Teresa Arias-Loste
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | | | - Raúl Pellón
- Radiology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Sara Sánchez
- Radiology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Juan Crespo
- Radiology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Mercedes Acebo
- Radiology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Marcos López-Hoyos
- Inmunology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Santander, Spain
| | - Rocío Pérez
- Hematology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Amalia Cuesta
- Hematology Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Ángela Antón
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Víctor Echavarría
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Emilio Fábrega
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Javier Crespo
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
| | - Jose Ignacio Fortea
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, Santander, Spain
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2
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González FJ, Sifuentes L, Ulloa-Arvizu R, Peiró MJP, Duarte G, Fernández IG. Group or individual housing does not reduce socio-sexual and reproductive responses in anestrous goats during the first contact with the photo-stimulated buck. Domest Anim Endocrinol 2023; 82:106772. [PMID: 36368185 DOI: 10.1016/j.domaniend.2022.106772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/02/2022] [Accepted: 10/17/2022] [Indexed: 11/03/2022]
Abstract
Herein, we examined the effect of the type of housing (individual vs group housing) of anestrus female goats on plasma cortisol concentrations and socio-sexual behaviors during first contact with photo-stimulated male goats and determined the impact on sexual and reproductive responses after 15 d of contact with photo-stimulated males. Therefore, after weaning, 10 females each were individually and group-housed, respectively. Ten bucks were rendered sexually active by exposure to artificially long days (16 h of light and 8 h of darkness per day) for 2.5 mo. During the naturally increasing photoperiod, 15-mo-old females were exposed and maintained with males. On day 0, during the first contact with males, individually- and group-housed females exhibited similar plasma cortisol concentrations (22.6 vs 27.4 ng/mL, respectively). Likewise, socio-sexual behaviors did not differ between examined groups on day 0. Moreover, the interval from first contact with males to the first estrus, short and normal ovulatory cycles, ovulation, fertility, and prolificacy rates were similar between differently housed females. Furthermore, mounting attempts did not differ between males in contact with either female group. In conclusion, individually- and group-housed anestrus females displayed elevated and similar plasma cortisol concentrations during first contact with photo-stimulated males and similar socio-sexual behaviors and reproductive responses when exposed to photo-stimulated males.
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Affiliation(s)
- F J González
- Centro de Investigación en Reproducción Caprina (CIRCA). Postgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez, 27054, Torreón, Coahuila, Mexico
| | - L Sifuentes
- Centro de Investigación en Reproducción Caprina (CIRCA). Postgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez, 27054, Torreón, Coahuila, Mexico
| | - R Ulloa-Arvizu
- Departamento de Genética y Bioestadística, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico
| | - M J Palomo Peiró
- Departamento de Medicina y Cirugía Animales, Universidad Autónoma de Barcelona, 08193, Bellaterra, Spain
| | - G Duarte
- Centro de Investigación en Reproducción Caprina (CIRCA). Postgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez, 27054, Torreón, Coahuila, Mexico
| | - I G Fernández
- Centro de Investigación en Reproducción Caprina (CIRCA). Postgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez, 27054, Torreón, Coahuila, Mexico.
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Odriozola A, Puente Á, Cuadrado A, Rivas C, Anton Á, González FJ, Pellón R, Fábrega E, Crespo J, Fortea JI. Portal Vein Thrombosis in the Setting of Cirrhosis: A Comprehensive Review. J Clin Med 2022; 11:6435. [PMID: 36362663 PMCID: PMC9655000 DOI: 10.3390/jcm11216435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 08/06/2023] Open
Abstract
Portal vein thrombosis constitutes the most common thrombotic event in patients with cirrhosis, with increased rates in the setting of advanced liver disease. Despite being a well-known complication of cirrhosis, the contribution of portal vein thrombosis to hepatic decompensation and overall mortality is still a matter of debate. The incorporation of direct oral anticoagulants and new radiological techniques for portal vein recanalization have expanded our therapeutic arsenal. However, the lack of large prospective observational studies and randomized trials explain the heterogenous diagnostic and therapeutic recommendations of current guidelines. This article seeks to make a comprehensive review of the pathophysiology, clinical features, diagnosis, and treatment of portal vein thrombosis in patients with cirrhosis.
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Affiliation(s)
- Aitor Odriozola
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Ángela Puente
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Antonio Cuadrado
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Coral Rivas
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Ángela Anton
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | | | - Raúl Pellón
- Radiology Department, Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Emilio Fábrega
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - Javier Crespo
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
| | - José Ignacio Fortea
- Gastroenterology and Hepatology Department, Clinical and Translational Research in Digestive Diseases, Valdecilla Research Institute (IDIVAL), Marqués de Valdecilla University Hospital, 39008 Santander, Spain
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4
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Sanchez JE, Mendoza-Santoyo F, Cantu-Valle J, Velazquez-Salazar J, José Yacaman M, González FJ, Diaz de Leon R, Ponce A. Electric radiation mapping of silver/zinc oxide nanoantennas by using electron holography. J Appl Phys 2015; 117:034306. [PMID: 25641981 PMCID: PMC4297280 DOI: 10.1063/1.4906102] [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] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 12/17/2014] [Indexed: 06/04/2023]
Abstract
In this work, we report the fabrication of self-assembled zinc oxide nanorods grown on pentagonal faces of silver nanowires by using microwaves irradiation. The nanostructures resemble a hierarchal nanoantenna and were used to study the far and near field electrical metal-semiconductor behavior from the electrical radiation pattern resulting from the phase map reconstruction obtained using off-axis electron holography. As a comparison, we use electric numerical approximations methods for a finite number of ZnO nanorods on the Ag nanowires and show that the electric radiation intensities maps match closely the experimental results obtained with electron holography. The time evolution of the radiation pattern as generated from the nanostructure was recorded under in-situ radio frequency signal stimulation, in which the generated electrical source amplitude and frequency were varied from 0 to 5 V and from 1 to 10 MHz, respectively. The phase maps obtained from electron holography show the change in the distribution of the electric radiation pattern for individual nanoantennas. The mapping of this electrical behavior is of the utmost importance to gain a complete understanding for the metal-semiconductor (Ag/ZnO) heterojunction that will help to show the mechanism through which these receiving/transmitting structures behave at nanoscale level.
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Affiliation(s)
- J E Sanchez
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
| | - F Mendoza-Santoyo
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
| | - J Cantu-Valle
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
| | - J Velazquez-Salazar
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
| | - M José Yacaman
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
| | - F J González
- Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología, Universidad Autónoma de San Luís Potosí , San Luis Potosí 78210, Mexico
| | - R Diaz de Leon
- Instituto Tecnológico de San Luis Potosí , San Luis Potosi 78437, Mexico
| | - A Ponce
- Department of Physics and Astronomy, University of Texas at San Antonio , San Antonio 78249, USA
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5
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Oyanguren B, Sánchez V, González FJ, de Felipe A, Esteban L, López-Sendón JL, Garcia-Barragán N, Martínez-San Millán J, Masjuán J, Corral I. Limbic encephalitis: a clinical-radiological comparison between herpetic and autoimmune etiologies. Eur J Neurol 2013; 20:1566-70. [PMID: 23941332 DOI: 10.1111/ene.12249] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [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: 05/16/2013] [Accepted: 07/08/2013] [Indexed: 01/17/2023]
Abstract
BACKGROUND Herpetic (HE) and autoimmune (AE) encephalitis share clinical and radiological features. We compared both types of encephalitis with the aim of making a differential clinical-radiological pattern. MATERIALS AND METHODS All cases with a clinical diagnosis of encephalitis who attended our hospital between 1999 and 2012 were reviewed. We selected those cases with positive polymerase chain reaction for herpes simplex virus 1 (HSV-1) in the cerebrospinal fluid (CSF), and those with antineuronal antibodies or paraneoplastic etiology. We compared epidemiological, clinical, CSF, electroencephalographic and radiological findings. RESULTS Twelve patients with positive polymerase chain reaction for HSV-1, and 10 patients with antineuronal antibody or paraneoplastic etiology were found. The only features found exclusively in one group were the presence of psychiatric symptoms and tumors in AE. Acute onset of symptoms, fever and aphasia were more frequent in HE, which showed higher level of proteins and erythrocyte count in CSF. Neuroimaging was abnormal in all cases of HE, but only in 60% of AE. Insular and diffuse temporal lobe involvement and absence of basal ganglia involvement were more frequent in HE, and mesial temporal involvement in AE. The highest diagnostic values for differentiating HE from AE were the association of acute onset of symptoms and fever (sensitivity 0.92, specificity 1), and the absence of basal ganglia involvement (sensitivity 0.82, specificity 1). CONCLUSIONS There are few differences between HE and AE. Psychiatric symptoms and association with tumors were unique for AE. Acute onset with fever and absence of basal ganglia involvement in magnetic resonance imaging support a diagnosis of HE.
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Affiliation(s)
- B Oyanguren
- Department of Neurology, Hospital Universitario Ramón y Cajal, IRYCIS (Health Research Institute), Madrid, Spain
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6
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González FJ, Alda J, Moreno-Cruz B, Martínez-Escanamé M, Ramírez-Elías MG, Torres-Álvarez B, Moncada B. Use of Raman spectroscopy for the early detection of filaggrin-related atopic dermatitis. Skin Res Technol 2011; 17:45-50. [PMID: 20923461 DOI: 10.1111/j.1600-0846.2010.00461.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Filaggrin (FLG) gene mutations, which result in complete or incomplete loss of proFLG/FLG peptides, have been reported as an important predisposing factor for atopic dermatitis (AD) and secondary atopic phenotypes such as atopic asthma. METHOD The presence of the protein FLG in the skin was evaluated at birth on 12 infants using Raman spectroscopy; these 12 infants were monitored for 1 year to see whether they developed AD. Three different statistical analysis procedures, two of which involved principal component analysis (PCA), were performed on the Raman spectra in order to determine the FLG content. RESULTS The infants who had a lower FLG content, determined using any of the three statistical analysis procedures proposed, were also the ones that clinically developed AD. CONCLUSION The results suggest that Raman spectroscopy and statistical analysis such as PCA could be used as an early detection procedure for FLG -related AD and as a possible quantitative marker for FLG gene mutations.
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Affiliation(s)
- F J González
- Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología, Universidad Autónoma de San Luis Potosí, SLP, México.
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7
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González FJ, Caturla JM, Fernández M, Carrasco R, Marco P, Sánchez J, Benlloch S. [Prognosis value of thrombin activatable fibrinolysis inhibitor concentration and C1040T polymorphism in acute myocardial infarction treated with fibrinolysis]. Med Intensiva 2011; 34:513-22. [PMID: 20627371 DOI: 10.1016/j.medin.2010.05.001] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 04/28/2010] [Accepted: 05/01/2010] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To analyze the prognostic value of thrombin activatable fibrinolysis inhibitor (TAFI) and C1040T polymorphism in acute myocardial infarction treated with fibrinolysis. To analyze C1040T polymorphism influence on its plasma level. DESIGN An observational, prospective study performed from November 2003 to November 2005 and with a 3 month follow-up. SETTING Intensive Medicine Service from a university-affiliated teaching hospital. PATIENTS A total of 53 patients with acute myocardial infarction with persistent ST segment elevation treated with the same fibrinolytic therapy. A control group of 53 biologically similar subjects was included. INTERVENTIONS None. MAIN MEASUREMENTS Baseline characteristics; frequency of wild-type genotype (Thr325Thr) and of those corresponding to the mutation (Thr325LLe and LLe325lle), TAFI levels at 6 h, 34 h and 3 months post-fibrinolysis; ejection fraction; Killip-Kimball; reperfusion; ischemic recurrence; death. RESULTS No relationship was found between biological features and TAFI concentration. The latter was significantly higher in infarct patients (p<0.01) and in the mutation group (p<0.01). The homozygotic mutation (Ile325Ile) was significantly higher in infarct patients (p<0.01). Reperfusion was significantly associated with lower body mass index (p=0.02. OR 0.22. 95% CI), ejection fraction (p=0.004. OR 0.91. 95% CI), triglyceride level (p=0.01. OR 1.02. 95% CI) and cholesterol levels (p=0.001. OR=0.84. 95% CI). Mutation was associated to a significant fall in post-fibrinolysis concentration TAFI antigen and functional TAFI (p=0.01) and (p=0.02), and lower frequency of reperfusion. Reperfusion was associated with a significant post-fibrinolysis reduction in the level of TAFI antigen (p=0.02). Recurrence was associated to a significantly higher post-fibrinolysis level (p=0.05. OR=0.84. 95% CI). This was more frequent in mutation. Post-fibrinolysis TAFI antigen concentration was significantly lower in non-recurrence patients (p=0.028. OR=1.03. 95% CI). CONCLUSIONS A higher concentration of TAFI is associated to a worse prognosis in reperfusion and recurrence in acute myocardial infarction treated with fibrinolysis. Homozygotic mutation was more frequent in myocardial infarction patients. Wild genotype is associated to a better prognosis. Mutation is associated to a higher expression of TAFI.
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Affiliation(s)
- F J González
- Servicio de Medicina Intensiva, Hospital General Universitario de Alicante, Alicante, España.
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8
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Martín ML, Turias IJ, González FJ, Galindo PL, Trujillo FJ, Puntonet CG, Gorriz JM. Prediction of CO maximum ground level concentrations in the Bay of Algeciras, Spain using artificial neural networks. Chemosphere 2008; 70:1190-1195. [PMID: 17920656 DOI: 10.1016/j.chemosphere.2007.08.039] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 08/14/2007] [Accepted: 08/16/2007] [Indexed: 05/25/2023]
Abstract
The region of the Bay of Algeciras is a very industrialized area where very few air pollution studies have been carried out. The main objective of this work has been the use of artificial neural networks (ANNs) as a predictive tool of high levels of ambient carbon monoxide (CO). Two approaches have been used: multilayer perceptron models (MLPs) with backpropagation learning rule and k-Nearest Neighbours (k-nn) classifiers, in order to predict future peaks of carbon monoxide. A resampling strategy with twofold cross-validation allowed the statistical comparison of the different topologies and models considered in the study. The procedure of random resampling permits an adequate and robust multiple comparisons of the tested models and allow us to select a group of best models.
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Affiliation(s)
- M L Martín
- EPS de Algeciras, Universidad de Cádiz, Avda Ramón Puyol s/n, 11202 Algeciras (Cádiz), Spain.
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9
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Piedra T, Ruíz E, González FJ, Arnaiz J, Lastra P, López-Rasines G. Fournier's gangrene: a radiologic emergency. ACTA ACUST UNITED AC 2006; 31:500-2. [PMID: 16947074 DOI: 10.1007/s00261-006-9035-x] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Accepted: 08/31/2005] [Indexed: 11/25/2022]
Abstract
Fournier's gangrene (FG) is a life-threatening, necrotizing infection involving the soft tissues of the scrotal area. Because of potential severe complications, it is important to diagnose the disease as early as possible. We present the CT findings of FG in a young male that came to the Emergency Department for genital pain and tenderness.
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Affiliation(s)
- Tatiana Piedra
- Department of Radiology, Hospital Universitario Marqués de Valdecilla, Av. Valdecilla s/n 39008, Santander, Cantabria, Spain.
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10
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Cardoza RE, Vizcaíno JA, Hermosa MR, Sousa S, González FJ, Llobell A, Monte E, Gutiérrez S. Cloning and characterization of the erg1 gene of Trichoderma harzianum: effect of the erg1 silencing on ergosterol biosynthesis and resistance to terbinafine. Fungal Genet Biol 2006. [PMID: 16466954 DOI: 10.1016/j.frb.2005.11.002] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Trichoderma species are commonly used as biocontrol agents of different plant-pathogenic fungi. Terpene compounds are involved in the biocontrol process due to their antifungal properties (e.g., ergokonins and viridins) but additionally their structural function in the cell membranes (ergosterol) is essential. We report here the characterization of the T. harzianum erg1 gene, encoding a squalene epoxidase, a key enzyme in the biosynthesis of triterpene derivatives such as ergosterol. In T. harzianum the partial silencing of the erg1 gene gave rise to transformants with a higher level of sensitivity to terbinafine, an antifungal compound that acts specifically over the squalene epoxidase activity. In addition, these silenced transformants produced lower levels of ergosterol than the wild type strain. Finally, the silencing of the erg1 gene resulted in an increase in the expression level of the erg7 gene that encodes the oxidosqualene lanosterol-cyclase, another enzyme of the terpene biosynthesis pathway.
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MESH Headings
- Antifungal Agents/pharmacology
- Cloning, Molecular
- DNA, Fungal/chemistry
- DNA, Fungal/genetics
- Drug Resistance, Fungal/genetics
- Ergosterol/biosynthesis
- Gene Expression Regulation, Fungal
- Gene Silencing
- Genetic Complementation Test
- Intramolecular Transferases/genetics
- Microbial Sensitivity Tests
- Molecular Sequence Data
- Naphthalenes/pharmacology
- Phylogeny
- RNA, Fungal/analysis
- RNA, Messenger/analysis
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Squalene Monooxygenase/genetics
- Squalene Monooxygenase/physiology
- Terbinafine
- Transcription, Genetic
- Trichoderma/drug effects
- Trichoderma/genetics
- Trichoderma/physiology
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Affiliation(s)
- R E Cardoza
- Spanish-Portuguese Center of Agricultural Research (CIALE), Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental lab 208, Spain
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11
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Cardoza RE, Vizcaíno JA, Hermosa MR, Sousa S, González FJ, Llobell A, Monte E, Gutiérrez S. Cloning and characterization of the erg1 gene of Trichoderma harzianum: Effect of the erg1 silencing on ergosterol biosynthesis and resistance to terbinafine. Fungal Genet Biol 2006; 43:164-78. [PMID: 16466954 DOI: 10.1016/j.fgb.2005.11.002] [Citation(s) in RCA: 46] [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] [Received: 10/07/2005] [Revised: 11/18/2005] [Accepted: 11/24/2005] [Indexed: 10/25/2022]
Abstract
Trichoderma species are commonly used as biocontrol agents of different plant-pathogenic fungi. Terpene compounds are involved in the biocontrol process due to their antifungal properties (e.g., ergokonins and viridins) but additionally their structural function in the cell membranes (ergosterol) is essential. We report here the characterization of the T. harzianum erg1 gene, encoding a squalene epoxidase, a key enzyme in the biosynthesis of triterpene derivatives such as ergosterol. In T. harzianum the partial silencing of the erg1 gene gave rise to transformants with a higher level of sensitivity to terbinafine, an antifungal compound that acts specifically over the squalene epoxidase activity. In addition, these silenced transformants produced lower levels of ergosterol than the wild type strain. Finally, the silencing of the erg1 gene resulted in an increase in the expression level of the erg7 gene that encodes the oxidosqualene lanosterol-cyclase, another enzyme of the terpene biosynthesis pathway.
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MESH Headings
- Antifungal Agents/pharmacology
- Cloning, Molecular
- DNA, Fungal/chemistry
- DNA, Fungal/genetics
- Drug Resistance, Fungal/genetics
- Ergosterol/biosynthesis
- Gene Expression Regulation, Fungal
- Gene Silencing
- Genetic Complementation Test
- Intramolecular Transferases/genetics
- Microbial Sensitivity Tests
- Molecular Sequence Data
- Naphthalenes/pharmacology
- Phylogeny
- RNA, Fungal/analysis
- RNA, Messenger/analysis
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Squalene Monooxygenase/genetics
- Squalene Monooxygenase/physiology
- Terbinafine
- Transcription, Genetic
- Trichoderma/drug effects
- Trichoderma/genetics
- Trichoderma/physiology
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Affiliation(s)
- R E Cardoza
- Spanish-Portuguese Center of Agricultural Research (CIALE), Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental lab 208, Spain
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12
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Zapata PD, Colas B, López-Ruiz P, Ropero RM, Martín RM, Rodríguez FJ, González FJ, López JI, Angulo JC. [Phosphotyrosine phosphatase SHP-1, somatostatin and prostate cancer]. Actas Urol Esp 2004; 28:269-85. [PMID: 15248398 DOI: 10.1016/s0210-4806(04)73075-2] [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: 11/20/2022]
Abstract
We review the mechanisms involved in prostatic growth based on androgens and product of neuroendocrine secretion, with special reference to the role of somatostatin (SS) in the inhibition of neoplastic growth. Our contributions in the field confirm the antiproliferative effect of SS on the prostate is mediated by phosphotyrosine phosphatase SHP-1, that is present in human prostate. This enzyme plays a role in the control of prostatic cell proliferation and in the progression of prostate cancer. Besides, we consider its presence may determine the therapeutic potential of SS in the control of prostate cancer.
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Affiliation(s)
- P D Zapata
- Departamento de Bioquímica, Universidad de Alcalá, Servicio de Urología, Hospital Príncipe de Asturias, Alcalá de Henares, Madrid
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13
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Affiliation(s)
- M F Guerra
- Department of Oral & Maxillofacial Surgery, University Hospital La Princesa (Autónoma University), Madrid, Spain
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14
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Guerra MF, Gías LN, Campo FJ, Pérez JS, de Artiñano FO, González FJ. The partial double-barrel free vascularized fibular graft: a solution for long mandibular defects. Plast Reconstr Surg 2000; 105:1902-3. [PMID: 10809131 DOI: 10.1097/00006534-200004050-00059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Guerra MF, Pérez JS, Díez JL, González FJ. Supraomohyoid cellulitis from placement of a dental implant. Plast Reconstr Surg 2000; 105:1900-1. [PMID: 10809129 DOI: 10.1097/00006534-200004050-00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Pérez JM, Granados JE, González FJ, Ruiz-Martinez I, Soriguer RC. Hematologic parameters of the Spanish ibex (Capra pyrenaica). J Zoo Wildl Med 1999; 30:550-4. [PMID: 10749444] [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: 02/16/2023] Open
Abstract
Thirteen hematologic parameters were measured in 52 Spanish ibexes (Capra pyrenaica) from Sierra Nevada Natural Park, southern Spain. The animals were captured, maintained in captivity, and physically restrained for blood collection. We compared hematologic values for healthy ibexes with animals infected with sarcoptic mites and animals treated for scabies and recovered. Ibexes with scabies showed a decreased number of erythrocytes, a higher mean corpuscular volume and mean corpuscular hemoglobin, and increased numbers of band neutrophils. The number of lymphocytes was significantly higher in animals that had recovered from scabies as compared with infested ones. The only difference observed between healthy and recovered animals was in the number of monocytes, which remained significantly higher in animals that had recovered from scabies. No hemoparasites were found in this study.
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Affiliation(s)
- J M Pérez
- Department of Animal and Plant Biology and Ecology, Jaén University, Faculty of Experimental Sciences, Paraje Las lagunillas, Spain
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17
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18
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González FJ, Iturralde P, Calderón J, González S, Guevara M, Colin L, González-Hermosillo JA. [Congenital atrioventricular junction tachycardia. Favorable response to anti-arrhythmia agents]. Arch Inst Cardiol Mex 1999; 69:55-62. [PMID: 10367094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The congenital junctional ectopic tachycardia, is an unusual tachyarrhythmia, with early clinic manifestation and poor antiarrhythmic drugs response with a great infant mortality reaching rates of 35%. It deserves a special attention in its timely detection as well as in its appropriate handling with different modalities of pharmacological and nonpharmacological therapy. We reported two cases in which age of presentation of tachyarrhythmia was at three months and whose particularity was the good response to antiarrhythmic drugs; verapamil and later propafenone, used for the acute stages and a combination of propafenone plus propranolol initially for the chronic stage. Due to intolerance it was necessary to change the treatment after a year for sotalol and digital with good response. We review the literature about this topic.
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Affiliation(s)
- F J González
- Departamento de Electrocardiografía y Electrofisiología, Instituto Nacional de Cardiología Ignacio Chávez INCICH, México D.F
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19
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González FJ, Leyva L, Posadas S, Luque I, Blanca M, Santamaría L, Juarez C. Participation of T lymphocytes in cutaneous allergic reactions to drugs. Clin Exp Allergy 1998; 28 Suppl 4:3-6. [PMID: 9761022] [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: 02/09/2023]
Abstract
Immunological mechanisms implicated in drug allergic reactions are not yet well understood, but there is 'in vivo' and 'in vitro' evidence that T lymphocytes are involved in these hypersensitivity reactions. The cutaneous lymphocyte-associated antigen (CLA) is the skin homing receptor and is involved in targeting a skin-selective memory T lymphocyte to cutaneous sites of chronic inflammation. We have seen that CLA expression is increased in circulating T lymphocytes of patients who develop a drug allergic cutaneous reaction, these cells are activated and their CLA values tend to become normal in parallel with the disappearance of skin symptoms, demonstrating that CD3+ CLA+ cells are involved in the immunological mechanisms responsible for the pathogenesis of the chronic inflammation process in cutaneous drug reactions.
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Affiliation(s)
- F J González
- Department of Internal Medicine, Carlos Haya Hospital, Malaga, Spain
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20
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Domínguez A, Fermiñán E, Sánchez M, González FJ, Pérez-Campo FM, García S, Herrero AB, San Vicente A, Cabello J, Prado M, Iglesias FJ, Choupina A, Burguillo FJ, Fernández-Lago L, López MC. Non-conventional yeasts as hosts for heterologous protein production. Int Microbiol 1998; 1:131-42. [PMID: 10943351] [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
Yeasts are an attractive group of lower eukaryotic microorganisms, some of which are used in several industrial processes that include brewing, baking and the production of a variety of biochemical compounds. More recently, yeasts have been developed as host organisms for the production of foreign (heterologous) proteins. Saccharomyces cerevisiae has usually been the yeast of choice, but an increasing number of alternative non-Saccharomyces yeasts has now become accessible for modern molecular genetics techniques. Some of them exhibit certain favourable traits such as high-level secretion or very strong and tightly regulated promoters, offering significant advantages over traditional bakers' yeast. In the present work, the current status of Kluyveromyces lactis, Yarrowia lipolytica, Hansenula polymorpha and Pichia pastoris (the best-known alternative yeast systems) is reviewed. The advantages and limitations of these systems are discussed in relation to S. cerevisiae.
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Affiliation(s)
- A Domínguez
- Departamento de Microbiología y Genética/Instituto de Microbiología Bioquímica/CSIC, Universidad de Salamanca, Spain.
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21
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González FJ, Montes J, Martin F, López MC, Fermiñán E, Catalán J, Galán MA, Domínguez A. Molecular cloning of TvDAO1, a gene encoding a D-amino acid oxidase from Trigonopsis variabilis and its expression in Saccharomyces cerevisiae and Kluyveromyces lactis. Yeast 1997; 13:1399-408. [PMID: 9434346 DOI: 10.1002/(sici)1097-0061(199712)13:15<1399::aid-yea187>3.0.co;2-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [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: 02/05/2023] Open
Abstract
The DAO1 gene of Trigonopsis variabilis encoding a D-amino acid oxidase (EC 1.4.3.3) was isolated from genomic clones selected for their specific hybridization to synthetic oligodeoxyribonucleotide probes based on regions of the enzyme that have been conserved through evolution. The nucleotide sequence of the gene predicts a protein with similarities to human, pig, rabbit, mouse and Fusarium solani D-amino acid oxidases. The open reading frame of the T. variabilis DAO1 gene was interrupted by an intron. The Dao1p sequence displays two regions, one in the N-terminal section--the FAD binding site--and the other near the C-terminal region that contains conserved signatures found in all the D-amino acid oxidases. The three C-terminal amino acids suggest that the enzyme may be located in peroxisomes. Northern blot experiments showed that no transcriptional activation occurred in the presence of D-methionine. The cDNA encoding Dao1p was expressed in Saccharomyces cerevisiae and Kluyveromyces lactis. Both yeast species are able to synthesize a functional enzyme under the control of the GAL1 promoter. In K. lactis, up to six times more enzyme units per gram of dry weight are produced with a multicopy plasmid in comparison with the wild-type strain of T. variabilis. The yeast expression system we describe may constitute an alternative source for the production of D-amino acid oxidases at industrial level.
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Affiliation(s)
- F J González
- Departamento de Microbiología y Genética, Universidad de Salamanca, Spain
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22
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Grande L, Rimola A, Cugat E, Alvarez L, García-Valdecasas JC, Taurá P, Beltrán J, Fuster J, Lacy AM, González FJ, Tabet J, Cifuentes A, Rull R, Ramos C, Visa J, Rodés J. Effect of venovenous bypass on perioperative renal function in liver transplantation: results of a randomized, controlled trial. Hepatology 1996; 23:1418-28. [PMID: 8675159 DOI: 10.1002/hep.510230618] [Citation(s) in RCA: 68] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Although venovenous bypass (VVBP) has been suggested to protect the kidneys during liver transplantation and its systematic use has therefore been recommended, this beneficial effect of VVBP has not been clearly demonstrated. In a prospective, randomized, controlled trial, 77 patients receiving liver transplants for chronic liver disease were allocated to be supported with VVBP (group 1, 38 patients) or not (group 2, 39 patients). Both groups were similar in relation to preoperative clinical and laboratory data and operative transfusion requirements. Inulin clearance and urinary beta(2)-microglobulin and N-acetyl-beta-D-glucosaminidase (NAG) excretion (to determine glomerular filtration rate and tubular damage, respectively) were measured at different perioperative periods (anesthesia induction, hepatectomy, anhepatic phase, biliary anastomosis, and 24 hours after surgery). A significant decrease in inulin clearance and increase in tubular damage markers were observed in the anhepatic phase, which only partly improved in the subsequent phases. No significant differences were observed between groups 1 and 2 at any perioperative phase, except during the anhepatic phase, in which a more marked renal function impairment occurred in group 2 patients. However, renal function on the 7th postoperative day and the need for hemodialysis/ hemofiltration during the 1st week were similar in both groups. Among 40 variables analyzed, only low mean arterial pressure at anesthesia induction was identified as an independent predictor for early postoperative severe renal failure (inulin clearance < 10 mL/min/1.73 m(2) at the 24th postoperative hour), with no significant relationship between this complication and the use of venovenous bypass. Renal function markedly deteriorates during liver transplantation, and renal impairment persists during the early postoperative period. Because VVBP support is not associated with any clear benefit in renal function, its systematic use does not seem to be justified.
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Affiliation(s)
- L Grande
- Department of Surgery, Hospital Clinic i Provincial, University of Barcelona, Spain
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23
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González FJ, Cosme A, Garmendia G, Villar JM, Horcajada JP, Arenas JI. [Secondary actinomycosis of the abdominal wall simulating a neoplasm]. Rev Esp Enferm Dig 1993; 83:293-4. [PMID: 8494664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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24
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González FJ, de Cabo A, Morán MJ, Manzano JM. [Team cohesiveness: opinions of a group of primary health care professionals from Salamanca]. Aten Primaria 1993; 11:302-4. [PMID: 8499537] [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: 01/31/2023] Open
Abstract
OBJECTIVE To assess the view of a group of Primary care professionals on their level of perception of group cohesiveness in their teams' work dynamic. DESIGN A descriptive and sectional study. SETTING Four urban health centres in Salamanca with a recognised teaching activity. PARTICIPANTS Both health professionals and those outside the Health Service, working in Primary Care, who had been members of their teams for more than a year (N = 90). MEASUREMENTS AND MAIN RESULTS Descriptive statistics and "Chi squared" tests were employed. PARTICIPATION 72%. A high level of agreement on the need for team work (95.23%). They perceived their group cohesiveness as being very low (84.21% affirmed that they encounter problems of cohesiveness). The main statements concerning this lack of cohesiveness were: "lack of common objectives" (25.5%), "intolerance between workers" (20.13%), "work not shared" (19.46%) and "the taking of decisions individually" (19.44%). The main causes given were: lack of support from Management (23.74%) and too little training for team work (21.58%). CONCLUSIONS There is a high degree of conviction that the team work model is the most efficacious way of developing Primary Care. However in three of the four teams questioned, there were serious problems preventing the teams' reaching an adequate level of group cohesiveness.
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25
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González FJ, Fauste C, Burguillo FJ, Dominguez A. Kinetic behaviour of a repressible acid phosphatase from the yeast Yarrowia lipolytica: a comparative study between the solubilized enzyme, the enzyme bound to cell-wall fragments and the enzyme bound to intact cells. Biochim Biophys Acta 1993; 1162:17-27. [PMID: 8448180 DOI: 10.1016/0167-4838(93)90122-8] [Citation(s) in RCA: 12] [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: 01/30/2023]
Abstract
(1) The substrate specificities and types of inhibitors of a repressible acid phosphatase from the yeast Yarrowia lipolytica as solubilized enzyme, enzyme bound to cell-wall fragments and enzyme bound to the intact cell were found to be essentially the same. (2) A similar pattern for the activation of the enzymatic activity by ionic strength was found for solubilized enzyme, the enzyme in cell-wall fragments and the enzyme in intact cells. (3) v[S] studies with all three locations of the enzyme revealed non-linear Eadie-Hofstee plots with concave-up curves of the negative cooperativity type; these were correctly fitted with a rate equation of 2:2 degree polynomial quotient. In all cases, the same behaviour was obtained and no new kinetic properties were observed when the enzyme was bound to the cell-wall matrix with respect to the solubilized enzyme. (4) Inhibition by phosphate was characterized for the three locations of the enzyme by v[I] and v[S] studies. The same pattern of partial inhibition and non-Michaelian inhibition of 'non-competitive' nature was observed for all three forms. (5) The above results are interpreted in terms of the hypothesis that the cell wall of Y. lipolytica has a slight negative charge but behaves as a permeable matrix that does not lead to novel characteristics regarding the catalytic and regulatory properties shown by the enzyme molecule in free solution.
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Affiliation(s)
- F J González
- Departamento de Química Física, Facultad de Farmacia, Universidad de Salamanca, Spain
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26
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García-Valdecasas JC, González FJ, Grande L, Rimola A, Navasa M, Fuster J, Lacy AM, Cugat E, Visa J. The use of the University of Wisconsin (UW) and Euro-Collins (EC) solutions either alone or in a combined method. Transpl Int 1992; 5:77-80. [PMID: 1627243 DOI: 10.1007/bf00339220] [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: 12/27/2022]
Abstract
From June 1988 to October 1990, a total of 100 orthotopic liver transplantations (OLTs) in 91 patients were performed at the Hospital Clínic of Barcelona. Euro-Collins (EC) solution was used as the flush and storage solution in 29 livers, and the University of Wisconsin (UW) solution was used in 24. A combined method, consisting of flushing and harvesting the liver with UW solution through the portal vein and with EC solution through the aorta, was used in the remaining 47 livers. Livers harvested using such a combined method showed substantially better postoperative function in terms of AST, ALT, and prothrombin activity than those harvested in EC solution alone. Although AST and ALT values were lower in patients whose livers were harvested using the combined method than with UW alone, differences were not significant. On the other hand, prothrombin activity was consistently better in the UW group. Bilirubin levels, platelet count, and bile output showed no difference among the three groups. We conclude that the combined use of UW and EC solutions for flushing and harvesting is not hazardous to human liver preservation and, in fact, may considerably reduce the amount of UW solution needed and, consequently, the costs.
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Muros MA, Aránega AE, Vélez C, González FJ, Fernández JE, Alvarez L, Aránega A. Changes in tropomyosin during primary culture of embryonic myocardiocytes. Cell Biol Int Rep 1992; 16:451-64. [PMID: 1628318 DOI: 10.1016/s0309-1651(06)80064-0] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We chose the Hamburger and Hamilton's stage 29 (HH 29) to investigate the expression of tropomyosin in chick myocardiocytes during 14 days on culture. Throughout 14 days of cell culture, changes in cell morphology were accompanied by a redistribution of tropomyosin in different cell compartments. We used FACScan, SDS-PAGE and densitometric analysis to quantify total cell tropomyosin and concentrations of this protein in different cell fractions. Tropomyosin was found mostly in the cytoskeletal fraction than in the cytoplasmic. When we compared the densitometric values from SDS-PAGE of cells in different stages of development we found that in HH 19, tropomyosin was more abundant in the cytoplasmic than in the cytoskeletal fraction. By HH 29, the two fractions had become inverted, and in HH 39, tropomyosin was clearly more abundant in the cytoskeletal than in the cytoplasmic fraction. In the IFI analysis, tropomyosin was found to label the Stress fiber-like structures (SFL) in different patterns depending on the area of the cell which expressed this protein.
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Affiliation(s)
- M A Muros
- Department of Morphological Sciences, School of Medicine, University of Granada, Spain
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28
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García-Valdecasas JC, González FJ, Grande L, Rimola A, Fuster J, Lacy AM, Cugat E, Visa J. Study of liver preservation: efficacy of a combined method using the UW solution. Transplant Proc 1992; 24:130-2. [PMID: 1539208] [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: 12/27/2022]
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29
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Vélez C, Aránega AE, Muros MA, González FJ, Prados-Salazar JC, Alvarez L, Aránega A. Quantification and distribution of troponin-T in cultures of chick embryo myocardiocytes. Acta Anat (Basel) 1992; 145:269-76. [PMID: 1466240 DOI: 10.1159/000147376] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We analyzed the distribution and labeling patterns of troponin-T, a protein involved in the regulation of striated muscle contraction, in myocardiocytes obtained from chick embryos in Hamburger and Hamilton's stage 25 and 39, and cultured for 8 days. Troponin-T expression was examined with indirect immunofluorescence, densitometry, fluorescence-activated cell sorting, electrophoresis and immunoblotting. The patterns of expression of troponin-T were compared with those of actin to determine possible correlations in different stages of chick embryo development and culture. Our findings show that in both stages of embryonic development, the cellular accumulation of troponin-T changed after 8 days of culture. Our results revealed a quantitative modification with time: after 4 days of culture there was a significant increase in this protein, followed by a slight additional increase after 8 days of culture. Flow cytometry findings confirmed these trends over time, showing a significant increase in positive cells after 4 days, followed by a smaller rise after 8 days of culture. In comparison with actin, this pattern was similar only in cells from Hamburger and Hamilton's stage 25 embryos.
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Affiliation(s)
- C Vélez
- Department of Morphological Sciences, School of Medicine, University of Granada, Spain
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30
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García-Valdecasas JC, González FJ, Grande L, Rimola A, Fuster J, Lacy AM, Cugat E, Visa J. Study of liver preservation: the use of University of Wisconsin or Euro-Collins solutions alone or in a combined method. Transplant Proc 1991; 23:2453-5. [PMID: 1926429] [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: 12/29/2022]
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31
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Aránega A, González FJ, Aránega AE, Muros MA, Fernández JE, Vélez C, Prados J, Alvarez L. Effects of fibric acid derivatives on accumulation of actin in myocardiocytes. Int J Cardiol 1991; 33:47-54. [PMID: 1937982 DOI: 10.1016/0167-5273(91)90151-e] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We used sodium dodecylsulphate polyacrylamide gel electrophoresis and immunoblotting to analyze the effects of the fibric acid derivatives bezafibrate, fenofibrate and gemfibrozil on the accumulation of actin in the cytoplasmic and cytoskeletal fraction of cultured myocardiocytes. All three drugs tested modified cellular and subcellular actin in different ways, and the findings are thought to be related with the secondary effect of arrhythmia known to be caused by these drugs. Bezafibrate and gemfibrozil more markedly affected accumulation of actin by myocytes, while fenofibrate interfered less notably with the accumulation of this protein.
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Affiliation(s)
- A Aránega
- Basic Cardiovascular Research Section, School of Medicine, University of Granada, Spain
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32
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González FJ, Aránega AE, Linares A, Fernández JE, Muros MA, Vélez C, Alvarez L, Aránega A. Influence of fibric acid derivatives on intermediate filament proteins in myocardiocyte cultures. Life Sci 1991; 48:1091-9. [PMID: 1997786 DOI: 10.1016/0024-3205(91)90511-9] [Citation(s) in RCA: 3] [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: 12/29/2022]
Abstract
We analyzed desmin and vimentin accumulation in chick myocardiocyte cultures treated with the fibric acid derivatives bezafibrate, fenofibrate and gemfibrozil. The most noteworthy finding was the 50% decrease in the cytoplasmic desmin fraction in cells treated with gemfibrozil in comparison to control cultures, and the 19% increase in the cytoskeletal fraction in cultures treated with gemfibrozil and with bezafibrate. Vimentin accumulation by cells treated with bezafibrate was similar to that in control cultures, however the cytoskeletal vimentin fraction rose by 26% after treatment with gemfibrozil, and fell 13% after treatment with fenofibrate. No vimentin was found in the cytoplasmic fraction of cell treated with bezafibrate. Given the role of intermediate filaments in heart muscle contraction, fibric acid derivative- induced changes in the cytoplasmic and cytoskeletal concentrations of intermediate filament proteins may be related with the secondary effects of these drugs on heart rate.
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Affiliation(s)
- F J González
- Departament of Morphological Sciences, School of Medicine, University of Granada, Spain
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33
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Muros MA, Vélez C, Aránega A, González FJ, Aránega AE, Fernández JE, Alvarez L. [Modulation of cardiac contractility in myogenesis using antidesmin monoclonal antibody]. Rev Esp Cardiol 1990; 43:323-7. [PMID: 2392612] [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: 12/31/2022]
Abstract
The cytoskeleton of the myocardiocyte is a complex network of protein filaments. The intermediate filaments, consisting fundamentally of desmin, are considered markers of cellular differentiation. We used indirect immunofluorescence with specific monoclonal antibody to characterize the expression of desmin during the different phases of heart maturation, and demonstrated a direct relationship between the expression of this protein and myocardiocyte development. Our results show that in auricular myocardiocytes, desmin is present in early stages of development, whereas in ventricular myocardiocytes, this protein, which is intimately involved in contractile function, first appears in HH stage 25.
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Affiliation(s)
- M A Muros
- Departamento de Ciencias Morfológicas, Facultad de Medicina de Granada, Universidad de Granada
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Dronda F, Moreno S, Montilla de Mora P, González FJ, Hernández JM, Fortún J, Buzón L. [Pneumonia caused by Mycoplasma pneumoniae]. Enferm Infecc Microbiol Clin 1989; 7:312-5. [PMID: 2490446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Mycoplasma pneumoniae is a common causative agent of community acquired pneumonia. To assess its epidemiological, clinical and evolutive features in our area, we retrospectively analyzed 88 instances which occurred during 10 years. Both sexes were similarly involved, with a higher incidence in younger patients (mean age: 22 years). A clear seasonal predominance was not detected during the study period. In nearly one half of instance there were similar respiratory episodes in the same household. Cough was a constant symptom, followed by fever and headache. The absence of leukocytosis and the presence of cryoagglutinins were suggestive data. Pulmonary infiltration in the chest radiogram was unilateral in most cases, with a segmental distribution and predominating in the lower lobes. Hilar lymph nodes, pleural effusion and cavitation were present in a limited number of instances. All patients were cured without sequelae. The occurrence of particular epidemiological, clinical and laboratory data may be very helpful in suggesting the diagnosis of pneumonia due to Mycoplasma pneumoniae.
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Franco M, Tapia E, Gabbai F, Cermeño JL, Calleja C, Pérez JM, Barrios R, Torres G, González FJ, Alvarado JA. [A change in glomerular permeability in renovascular hypertension. Participation of angiotensin and structural lesions]. Arch Inst Cardiol Mex 1986; 56:13-24. [PMID: 2943240] [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: 01/03/2023]
Abstract
To characterize the decrease in glomerular permeability that occurs in contralateral kidney of renovascular hypertension, glomerular hemodynamics were studied in Goldblatt hypertensive and normotensive control rats. The effects of converting enzyme inhibition (captopril) and renal vasodilatation induced with hyperoncotic plasma were evaluated: in addition, glomerular morphometry was performed. In hypertension, glomerular capillary pressure was increased, ultrafiltration coefficient was decreased, single-nephron filtration rate was normal and afferent resistance was elevated. Captopril rose glomerular filtration rate only in normotensive rats, but ultrafiltration coefficient increased in both groups. Hyperoncotic plasma induced a 98% increment in filtration rate and ultrafiltration coefficient rose by 48% in normotensive group. In hypertensive rats, filtration rate increased only 15% and ultrafiltration coefficient diminished 6%, morphometric studies showed dilatation of capillary loops and a larger glomerular volume. Similar response to captopril in both groups of rats suggest that the reduction in ultrafiltration coefficient in hypertension is not dependent of angiotensin; lack of response to hyperoncotic plasma suggests that it could be produced by structural changes in capillary wall that diminish hydraulic permeability since the larger glomerular volume indicates a greater area for filtration.
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