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Ramos G, De Luca R, Narayanan H, Feidl F, Sokolov M, von Stosch M, Butté A. Hybrid modeling of chromatographic columns enables fast process development. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- G. Ramos
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - R. De Luca
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - H. Narayanan
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - F. Feidl
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - M. Sokolov
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - M. von Stosch
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
| | - A. Butté
- DataHow AG Downstream Modeling Zürichstr. 137 8600 Dübendorf Switzerland
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Boone C, Melber D, Ballas J, Ramos G, Kelly T, McHale M, Picel A, Roberts A, Berman Z. Abstract No. 133 ▪ FEATURED ABSTRACT Multivessel pelvic embolization during cesarean hysterectomy for placenta accreta spectrum: A single-center experience and comparison to internal iliac artery balloon occlusion. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Hardy S, Patrick R, Liesinger L, Pöttler M, Rech L, Gindlhuber J, Mabotuwana N, Ashour D, Stangl V, Bigland M, Murtha L, Starkey M, Scherr D, Hansbro P, Höfler G, Ramos G, Cochain C, Harvey R, Birner-Gruenberger R, Boyle A, Rainer P. Extracellular Matrix Protein 1 as a Mediator of Inflammation-Induced Fibrosis After Myocardial Infarction. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dolejsi T, Schuetz T, Delgobo M, Tortola L, Bauer A, Ruschitzka F, Penninger J, Ramos G, Haubner B. Adult T-cells impair neonatal cardiac regeneration. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiac remodeling and subsequent heart failure remain critical issues after myocardial infarction (MI). Complete cardiac regeneration was shown recently in a neonatal mouse model of MI. This cardiac regenerative potential is limited to the first few postnatal days and its decline parallels with the maturation of the adaptive immune system.
Purpose
Herein, we hypothesized that the T-cell maturation status critically impacts the myocardial healing outcomes in neonates and contributes to the shift from regenerative to scarring phenotype observed shortly after birth.
Methods
The post-MI immune responses were characterized in postnatal day one (P1, regenerative) compared to seven-day old (P7, scarring) mice subjected to permanent left anterior descending artery (LAD) ligation. The myocardial leukocyte infiltrate was phenotyped by flow cytometry at 36 hours and five days after LAD ligation. Next, we studied neonatal post-MI repair in lymphocyte-deficient Rag2 knock-out (KO) mice subjected to LAD ligation. Moreover, we adoptively transferred syngeneic splenic Thy 1.1+ T-cells obtained from adult donors into P1 versus P7 recipients and then assessed their impact on post-MI healing.
Results
LAD ligation induced a robust early inflammatory response (36h post-MI) in both age groups. The in situ inflammation was, nevertheless, rapidly resolved in P1-, but not in P7-infarcted animals. The distinct age groups showed a similar profile of cardiac myeloid cell infiltration but showed remarkable differences in the lymphoid compartment. P1-infarcted mice showed an early recruitment of γδT-cells, whereas P7-infarcted mice exhibited a prominent infiltration of αβT-cells. Of note, neonatal cardiac regeneration was not altered in neonatal lymphocyte-deficient (Rag2 KO) animals. However, the adoptive transfer of adult T-cells had several consequences in neonatal and one week old mice subjected to ischemic injury. P1-infarcted mice transferred with adult T-cells showed an adult-like healing phenotype, marked by an irreversible cardiac functional impairment (assessed by echocardiography) and increased fibrosis. This is in sharp contrast to the regenerative phenotype typically observed in untreated age-matched controls. Furthermore, P7-infarcted mice transferred with adult T-cell showed significantly decreased survival rate after LAD ligation.
Conclusion
Neonatal hearts demonstrate rapid clearance of the ischemia-induced leukocyte infiltration, further reflecting the known fact of fast cardiac regeneration in newborn rodents. Of note, the adoptive transfer of adult T-cells into neonate recipients partially blocked cardiac regeneration and promoted an irreversible functional impairment. These data indicate that the cardiac repair process, and its related “regeneration vs. scarring” dichotomy, is critically impacted by the T-cell development status.
Funding Acknowledgement
Type of funding source: Public Institution(s). Main funding source(s): Innsbruck Medical University, Medizinischer Forschungsfonds Tirol
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Affiliation(s)
- T Dolejsi
- Innsbruck Medical University, Innsbruck, Austria
| | - T Schuetz
- Innsbruck Medical University, Innsbruck, Austria
| | - M Delgobo
- Comprehensive Heart Failure Center (CHFC), Wurzburg, Germany
| | - L Tortola
- Swiss Federal Institute of Technology Zurich (ETH Zurich), Zurich, Switzerland
| | - A Bauer
- Innsbruck Medical University, Innsbruck, Austria
| | | | | | - G Ramos
- Comprehensive Heart Failure Center (CHFC), Wurzburg, Germany
| | - B.J Haubner
- University Hospital Zurich, Zurich, Switzerland
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Cisarik PM, Brise L, Ramos G. Anisocoria assessment in subjects with dark irides - Custom-built infrared screening device vs. millimeter ruler. J Optom 2020; 13:235-241. [PMID: 32331923 PMCID: PMC7520532 DOI: 10.1016/j.optom.2020.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 02/25/2020] [Accepted: 03/01/2020] [Indexed: 06/11/2023]
Abstract
PURPOSE Detection of anisocoria in those with dark irides is difficult, and failure to detect anisocoria can have dire consequences. Whether infrared pupillometry and gross measurement would yield different prevalence rates for anisocoria in those with dark irides is unknown. We compared the frequency of anisocoria in healthy adults with dark irides assessed with mm ruler versus infrared pupillometry. METHODS Pupil diameters in light (L) and dark (D) conditions were obtained to identify anisocoria in 59 human subjects with dark irides using two techniques. To avoid bias, gross measurements (S) with ruler were taken first. Pupils were imaged under infrared illumination mounted in a spectacle frame with mm tape attached. Adobe Photoshop was used to measure pupil sizes on the digital images (O). RESULTS Proportions of anisocoria by group were SL .034, OL .130, SD 0.00, OD .135. Fisher's exact test showed that anisocoria in dim light was more frequent with the infrared photo technique. Exact binomial probability testing showed that the anisocoria in SL and SD conditions was not different from an expected proportion of 5%; whereas anisocoria in OL condition was not different from an expected proportion of 20%, and anisocoria in OD condition was not different from expected proportions of 10, 15, and 20%. CONCLUSIONS In people with dark irides, ruler measurements of pupil size underestimate the frequency of anisoria in dim lighting conditions compared to the use of infrared pupillometry. Whether detection rates of pathologic anisocoria differ with measurement technique remain to be explored.
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Affiliation(s)
- Patricia M Cisarik
- Southern College of Optometry, 1245 Madison Avenue, Memphis, TN 38117, United States.
| | - Lindsey Brise
- Southern College of Optometry, 1245 Madison Avenue, Memphis, TN 38117, United States
| | - Greyson Ramos
- Southern College of Optometry, 1245 Madison Avenue, Memphis, TN 38117, United States
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Ramos G, Vaz JR, Mendonça GV, Pezarat-Correia P, Rodrigues J, Alfaras M, Gamboa H. Fatigue Evaluation through Machine Learning and a Global Fatigue Descriptor. J Healthc Eng 2020; 2020:6484129. [PMID: 31998469 PMCID: PMC6969995 DOI: 10.1155/2020/6484129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/19/2019] [Accepted: 11/11/2019] [Indexed: 12/22/2022]
Abstract
Research in physiology and sports science has shown that fatigue, a complex psychophysiological phenomenon, has a relevant impact in performance and in the correct functioning of our motricity system, potentially being a cause of damage to the human organism. Fatigue can be seen as a subjective or objective phenomenon. Subjective fatigue corresponds to a mental and cognitive event, while fatigue referred as objective is a physical phenomenon. Despite the fact that subjective fatigue is often undervalued, only a physically and mentally healthy athlete is able to achieve top performance in a discipline. Therefore, we argue that physical training programs should address the preventive assessment of both subjective and objective fatigue mechanisms in order to minimize the risk of injuries. In this context, our paper presents a machine-learning system capable of extracting individual fatigue descriptors (IFDs) from electromyographic (EMG) and heart rate variability (HRV) measurements. Our novel approach, using two types of biosignals so that a global (mental and physical) fatigue assessment is taken into account, reflects the onset of fatigue by implementing a combination of a dimensionless (0-1) global fatigue descriptor (GFD) and a support vector machine (SVM) classifier. The system, based on 9 main combined features, achieves fatigue regime classification performances of 0.82 ± 0.24, ensuring a successful preventive assessment when dangerous fatigue levels are reached. Training data were acquired in a constant work rate test (executed by 14 subjects using a cycloergometry device), where the variable under study (fatigue) gradually increased until the volunteer reached an objective exhaustion state.
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Affiliation(s)
- G. Ramos
- PLUX Wireless Biosignals S.A, Avenida 5 Outubro 70, 1050-59 Lisbon, Portugal
| | - J. R. Vaz
- Department of Biomechanics and Center for Research in Human Movement Variability, University of Nebraska at Omaha, Omaha, NE, USA
- Universidade Europeia, Laureate International Universities, Lisbon, Portugal
- Neuromuscular Research Lab, CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal
| | - G. V. Mendonça
- Neuromuscular Research Lab, CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal
| | - P. Pezarat-Correia
- Neuromuscular Research Lab, CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal
| | - J. Rodrigues
- Laboratory for Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Faculty of Sciences and Technology of NOVA University of Lisbon, Caparica, Portugal
| | - M. Alfaras
- PLUX Wireless Biosignals S.A, Avenida 5 Outubro 70, 1050-59 Lisbon, Portugal
- Universitat Jaume I, Castelló de la Plana, Spain
| | - H. Gamboa
- Laboratory for Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Faculty of Sciences and Technology of NOVA University of Lisbon, Caparica, Portugal
- Department of Physics, Faculty of Sciences and Technology of NOVA University of Lisbon, Caparica, Portugal
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Bacaret W, Cabrera M, Ramos G, Varela R, Donoso W. Metástasis inusuales en carcinoma de células renales. Rev Urol 2018. [DOI: 10.1055/s-0038-1645860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Introducción y Objetivos El carcinoma renal de células claras (CCR), es la neoplasia renal más frecuente. Hasta el 30% de los casos presentan enfermedad sistémica, siendo las más usuales: pulmón, ganglios, hígado y cerebro. El objetivo de este trabajo es informar casos poco frecuentes de metástasis por CCR y establecer posibles factores relacionados con las metástasis.
Métodos y Materiales revisión retrospectiva de historias clínicas en el instituto nacional de cancerología de los pacientes con carcinoma de células renales metastásico entre los años 2013 a 2017. Se identificaron 6 casos con sitios de metástasis inusuales en pacientes del servicio de urología oncológica del instituto nacional de cancerología, destacando histopatología e inmunohistoquímica de los especímenes quirúrgicos tanto del primario como de la metástasis, reportando marcadores específicos y clasificaciones según corresponda.
Resultados Caso 1 Metástasis a duodeno, Caso 2 metástasis a ovario, caso 3 metástasis a testículo, caso 4 metástasis a piel, caso 5 metástasis a glándula tiroides, caso 6 metástasis a mama y piel. Se evaluaron diferentes variables y se analizaron con base en la literatura.
Conclusiones Consideramos que la edad, el tabaquismo, el grado histológico, la invasión de la vena renal, el tamaño tumoral y el estadio pueden ser factores predisponentes para ese comportamiento.
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Affiliation(s)
- W. Bacaret
- Residente em Urología Universidad Nacional de Colombia, Bogotá, Colombia
| | - M. Cabrera
- Urólogo, Instituto Nacional de Cancerología, Bogotá, Colombia
| | - G. Ramos
- Urólogo, Instituto Nacional de Cancerología, Bogotá, Colombia
| | - R. Varela
- Profesor Asociado de Urología, Universidad Nacional de Colombia, Bogotá, Colombia
| | - W. Donoso
- Profesor Asociado de Urología, Universidad Nacional de Colombia, Bogotá, Colombia
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Agroyannis B, Dalamangas A, Tzanatos H, Konstadinidou I, Fourtounas K, Kopelias J, Ramos G, Koutsikos D. Relationship between Echinocytosis and Erythrocyte Sedimentation Rate (ESR) in Hemodialysis (HD). Int J Artif Organs 2018. [DOI: 10.1177/039139889301601212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- B. Agroyannis
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - A. Dalamangas
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - H. Tzanatos
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - I. Konstadinidou
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - K. Fourtounas
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - J. Kopelias
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - G. Ramos
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
| | - D. Koutsikos
- Department of Nephrology, Aretaieon University Hospital, Athens, Greece
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Ceballos-Soto F, Nieto-Perez M, Ramos G. Design of a pulse transformer for the ohmic heating system of a small tokamak. Fusion Engineering and Design 2017. [DOI: 10.1016/j.fusengdes.2017.05.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pankatz M, Abeck I, Ramos G. Vermittlung von Kindern und Jugendlichen mit Adipositas in Freizeitangebote. Gesundheitswesen 2016. [DOI: 10.1055/s-0036-1586691] [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: 10/21/2022]
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De la Lama J, Fernandez J, Punzano J, Nicolas M, Nin S, Mengual R, Ramirez J, Raya AL, Ramos G. Using Six Sigma tools to improve internal processes in a hospital center through three pilot projects. International Journal of Healthcare Management 2013. [DOI: 10.1179/2047971913y.0000000044] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ramos G, Brotschi B, Latal B, Bernet V, Wagner B, Hagmann C. Therapeutic hypothermia in term infants after perinatal encephalopathy: the last 5 years in Switzerland. Early Hum Dev 2013; 89:159-64. [PMID: 23116611 DOI: 10.1016/j.earlhumdev.2012.09.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 07/25/2012] [Accepted: 09/17/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Therapeutic hypothermia (TH) following perinatal asphyxial encephalopathy in term infants improves mortality and neurodevelopmental outcome. In Europe, most neonatal units perform active cooling whereas in Switzerland passive cooling is predominantly used. AIMS (i) To determine how many infants were cooled within the last 5years in Switzerland, (ii) to assess the cooling methods, (iii) to evaluate the variation of temperature of different cooling methods, and (iv) to evaluate the use of neuromonitoring. STUDY DESIGN Retrospective cohort study. PATIENTS Notes of all cooled term infants between March 2005 and December 2010 in 9 perinatal and two paediatric intensive care centres were retrospectively reviewed. Active cooling was compared to passive cooling alone and to passive cooling in combination with gel packs. RESULTS 150 infants were cooled. Twenty-seven (18.2%) were cooled actively, 34 (23%) passively and 87 (58.8%) passively in combination with gel packs. Variation of temperature was significantly different between the three methods. Passive cooling had a significant higher variation of temperature (SD of 0.89) than both passive cooling in combination with gel packs (SD of 0.79) and active cooling (SD of 0.76). aEEG before TH was obtained in 35.8% of the infants and 86.5% had full EEG. One cUS was performed in 95.3% and MRI in 62.2% of the infants. CONCLUSION Target temperature can be achieved with all three cooling methods. Passive cooling has the highest variation of temperature. Neuromonitoring should be improved in Swiss neonatal and paediatric intensive care units. Our results stress the importance of national registries.
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Affiliation(s)
- G Ramos
- Clinic of Neonatology, University Hospital Zurich, Zurich, Switzerland
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Carneiro NK, Oda JMM, Losi Guembarovski R, Ramos G, Oliveira BV, Cavalli IJ, de S. F. Ribeiro EM, Gonçalves MSB, Watanabe MAE. Possible association between TGF-β1 polymorphism and oral cancer. Int J Immunogenet 2013; 40:292-8. [DOI: 10.1111/iji.12037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 11/23/2012] [Accepted: 12/12/2012] [Indexed: 01/29/2023]
Affiliation(s)
- N. K. Carneiro
- Department of Pathological Sciences; Biological Science Center; Laboratory of Molecular Genetic and Immunology; State University of Londrina; Londrina; PR; Brazil
| | - J. M. M. Oda
- Department of Pathological Sciences; Biological Science Center; Laboratory of Molecular Genetic and Immunology; State University of Londrina; Londrina; PR; Brazil
| | - R. Losi Guembarovski
- Department of Pathological Sciences; Biological Science Center; Laboratory of Molecular Genetic and Immunology; State University of Londrina; Londrina; PR; Brazil
| | - G. Ramos
- Service of Head and Neck; Erasto Gaertner Hospital; Curitiba; PR; Brazil
| | - B. V. Oliveira
- Service of Head and Neck; Erasto Gaertner Hospital; Curitiba; PR; Brazil
| | - I. J. Cavalli
- Department of Genetic; Human Cytogenetic and Oncogenetic Laboratory; Federal University of Parana; Curitiba; PR; Brazil
| | - E. M. de S. F. Ribeiro
- Department of Genetic; Human Cytogenetic and Oncogenetic Laboratory; Federal University of Parana; Curitiba; PR; Brazil
| | - M. S. B. Gonçalves
- Laboratory of Histocompatibility; State University of Londrina; Londrina; PR; Brazil
| | - M. A. E. Watanabe
- Department of Pathological Sciences; Biological Science Center; Laboratory of Molecular Genetic and Immunology; State University of Londrina; Londrina; PR; Brazil
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Abstract
We present PivotPaths, an interactive visualization for exploring faceted information resources. During both work and leisure, we increasingly interact with information spaces that contain multiple facets and relations, such as authors, keywords, and citations of academic publications, or actors and genres of movies. To navigate these interlinked resources today, one typically selects items from facet lists resulting in abrupt changes from one subset of data to another. While filtering is useful to retrieve results matching specific criteria, it can be difficult to see how facets and items relate and to comprehend the effect of filter operations. In contrast, the PivotPaths interface exposes faceted relations as visual paths in arrangements that invite the viewer to `take a stroll' through an information space. PivotPaths supports pivot operations as lightweight interaction techniques that trigger gradual transitions between views. We designed the interface to allow for casual traversal of large collections in an aesthetically pleasing manner that encourages exploration and serendipitous discoveries. This paper shares the findings from our iterative design-and-evaluation process that included semi-structured interviews and a two-week deployment of PivotPaths applied to a large database of academic publications.
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Luis J, Cadena C, Zedillo B, Reyes J, Ramos G, Martínez M. Testosterone replacement induced paternal behaviour in the Mexican volcano mouseNeotomodon alstoni(Rodentia Muridae). ETHOL ECOL EVOL 2012. [DOI: 10.1080/03949370.2012.661374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Affiliation(s)
- G Ramos
- Gastroenterology Department, Hospital de Santo António dos Capuchos, Centro Hospitalar de Lisboa Central E. P. E., Lisbon, Portugal.
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Al-Khan A, Aye IL, Barsoum I, Borbely A, Cebral E, Cerchi G, Clifton VL, Collins S, Cotechini T, Davey A, Flores-Martin J, Fournier T, Franchi AM, Fretes RE, Graham CH, Godbole G, Hansson SR, Headley PL, Ibarra C, Jawerbaum A, Kemmerling U, Kudo Y, Lala PK, Lassance L, Lewis RM, Menkhorst E, Morris C, Nobuzane T, Ramos G, Rote N, Saffery R, Salafia C, Sarr D, Schneider H, Sibley C, Singh AT, Sivasubramaniyam TS, Soares MJ, Vaughan O, Zamudio S, Lash GE. IFPA Meeting 2010 Workshops Report II: Placental pathology; trophoblast invasion; fetal sex; parasites and the placenta; decidua and embryonic or fetal loss; trophoblast differentiation and syncytialisation. Placenta 2011; 32 Suppl 2:S90-9. [PMID: 21236487 DOI: 10.1016/j.placenta.2010.12.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 12/21/2010] [Accepted: 12/21/2010] [Indexed: 11/29/2022]
Abstract
Workshops are an important part of the IFPA annual meeting. At IFPA Meeting 2010 diverse topics were discussed in twelve themed workshops, six of which are summarized in this report. 1. The placental pathology workshop focused on clinical correlates of placenta accreta/percreta. 2. Mechanisms of regulation of trophoblast invasion and spiral artery remodeling were discussed in the trophoblast invasion workshop. 3. The fetal sex and intrauterine stress workshop explored recent work on placental sex differences and discussed them in the context of whether boys live dangerously in the womb.4. The workshop on parasites addressed inflammatory responses as a sign of interaction between placental tissue and parasites. 5. The decidua and embryonic/fetal loss workshop focused on key regulatory mediators in the decidua, embryo and fetus and how alterations in expression may contribute to different diseases and adverse conditions of pregnancy. 6. The trophoblast differentiation and syncytialisation workshop addressed the regulation of villous cytotrophoblast differentiation and how variations may lead to placental dysfunction and pregnancy complications.
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Affiliation(s)
- A Al-Khan
- Department of Obstetrics and Gynaecology, University of California San Diego, San Diego, CA, USA
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Tupasi TE, Radhakrishna S, Chua JA, Mangubat NV, Guilatco R, Galipot M, Ramos G, Quelapio MID, Beltran G, Legaspi J, Vianzon RG, Lagahid J. Significant decline in the tuberculosis burden in the Philippines ten years after initiating DOTS. Int J Tuberc Lung Dis 2009; 13:1224-1230. [PMID: 19793426] [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: 05/28/2023] Open
Abstract
BACKGROUND The Philippines ranks ninth among the 22 high-burden countries for tuberculosis (TB). OBJECTIVE To measure the burden of pulmonary tuberculosis (PTB) in the Philippines and determine the impact of the DOTS strategy. MATERIALS AND METHODS The 2007 nationwide TB prevalence survey covered 50 clusters selected by multi-stage stratified random sampling from Metro Manila and other urban and rural areas. Subjects aged >or=10 years were screened radiographically for PTB to identify subjects for sputum examination and determine the prevalence of bacteriologically confirmed PTB, i.e., smear- and/or culture-positive PTB. RESULTS In subjects aged >or=10 years, the 2007 prevalence of radiographic PTB was 6.3% (95%CI 5.5-7.1), bacteriologically confirmed PTB was 6.6 per 1000 (95%CI 5.1-8.1) and sputum smear-positive PTB was 2.6/1000 (95%CI 1.7-3.6). For the total population, the corresponding estimates were respectively 4.7%, 4.9/1000 and 2.0/1000. Between 1997 and 2007, there was a 31% reduction in bacteriologically confirmed PTB (P < 0.02) and a 27% reduction in smear-positive PTB (P = 0.18). This decline occurred despite the increasing poverty in the population. CONCLUSION The survey demonstrated a significant decline in the TB burden 10 years after the implementation of DOTS, facilitated by a strategic public-private partnership.
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Affiliation(s)
- T E Tupasi
- Tropical Disease Foundation, Makati Medical Center, Makati, The Philippines.
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Leichsenring A, Losi-Guembarovski R, Maciel ME, Losi-Guembarovski A, Oliveira BW, Ramos G, Cavalcanti TCS, Bicalho MG, Cavalli IJ, Cólus IMS, Ribeiro EMSF. CYP1A1 and GSTP1 polymorphisms in an oral cancer case-control study. ACTA ACUST UNITED AC 2007; 39:1569-74. [PMID: 17160265 DOI: 10.1590/s0100-879x2006001200007] [Citation(s) in RCA: 21] [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] [Received: 03/30/2006] [Accepted: 09/06/2006] [Indexed: 11/22/2022]
Abstract
CYP1A1 and GSTP1 polymorphisms have been associated with a higher risk to develop several cancers, including oral squamous cell carcinoma (OSCC), which is closely related to tobacco and alcohol consumption. Both genes code for enzymes that have an important role in activating or detoxifying carcinogenic elements found in tobacco and other compounds, and polymorphic variants of these genes may result in alterations of the enzymatic activity. The CYP1A1 gene codes for the enzyme aryl hydrocarbon hydroxylase, which is responsible for the metabolism of polycyclic aromatic hydrocarbons. The investigated polymorphism, Ile/Val, seems to increase the activity of the enzyme in homozygous individuals, leading to an accumulation of carcinogens. The Ile/Val polymorphism occurs because of an A->G transition at exon 7, resulting in the CYP1A1*2B allele. The GSTP1*B variant shows an A->G transition at exon 5, changing the amino acid Ile to Val, with a reduced catalytic activity of the enzyme. Due to this reduction, the carriers of mutant alleles lost the capability to metabolize carcinogens, which could be responsible for a higher susceptibility to cancer. We conducted a case-control study in a group of 72 cases with newly diagnosed OSCC and 60 healthy controls matched for age, gender, smoking habits, and ethnicity. We used PCR methods to identify the allelic variants CYP1A1*2B and GSTP1*B. The data obtained showed no statistically significant association of allelic or genotypic variants of CYP1A1*2B (OR = 1.06; 95% CI = 0.49-2.29) and GSTP1*B (OR = 1.40; 95% CI = 0.70-2.79) with OSCC.
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Affiliation(s)
- A Leichsenring
- Laboratório de Citogenética Humana e Oncogenética, Departamento de Genética, Universidade Federal do Paraná, 81531-970 Curitiba, PR, Brazil.
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Heredero RL, Uribe-Patarroyo N, Belenguer T, Ramos G, Sánchez A, Reina M, Pillet VM, Alvarez-Herrero A. Liquid-crystal variable retarders for aerospace polarimetry applications. Appl Opt 2007; 46:689-98. [PMID: 17279156 DOI: 10.1364/ao.46.000689] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We present the optical effects of different tests that simulate the aerospace environment on the liquid-crystal variable retarders (LCVRs) used in the Imaging Magnetograph eXperiment postfocal instrument of the SUNRISE payload within the NASA Long Duration Balloon program. Analysis of the influence of vacuum, temperature, vibration, and gamma and ultraviolet radiation is performed by measuring the effects of these tests on the optical retardance, the response time, the wavefront distortion, and the transmittance, including some in situ measurements. Outgassing measurements of the different parts of the LCVRs are also shown. From the results obtained it can be concluded that these optical devices are suitable and seem to be excellent candidates for aerospace platforms.
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Affiliation(s)
- R L Heredero
- Laboratorio de Instrumentación Espacial, Instituto Nacional de Técnica Aerospacial, Madrid, Spain
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22
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Ramos G, Flageat G, Queiroz G, Nacif G, Fiorentino R, Arata A, Capalbo L, Shilton J. Massive Hospital Admission of Patients with Respiratory Failure Resulting from Smoke Inhalation Injury: The Cromagnon Republic Tragedy. J Burn Care Res 2006; 27:842-7. [PMID: 17091080 DOI: 10.1097/01.bcr.0000245412.23015.fe] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- G Ramos
- Intensive Care Unit, Cosme Argerich Hospital, Buenos Aires, Argentina
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Ramos G, Bolgiani A, Patiño O, Prezzavento G, Guastavino P, Durlach R, Fernandez Caniggia L, Benaim F. Antiseptic-impregnated central venous catheters: their evaluation in burn patients. Ann Burns Fire Disasters 2006; 19:63-7. [PMID: 21991025 PMCID: PMC3188027] [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] [Subscribe] [Scholar Register] [Received: 08/29/2005] [Indexed: 05/31/2023]
Abstract
Central venous catheter-related infections are an important source of morbidity and mortality in burn patients. Antiseptic impregnated catheters have been recommended to prevent infections related to central venous lines in high-risk patients who require short-term catheters. This prospective, randomized, and controlled study compared the efficacy of standard and antiseptic devices in reducing catheter-related infections in burn patients. Twenty-two patients were included in the study with an average age of 47.6 yr and an average burned total body surface area of 38.7%. Thirty-eight silver-sulphadiazine, chlorhexidine catheters were compared with 40 non-antiseptic catheters. No differences in bacteraemia or colonization rates were observed between standard and antiseptic-coated catheters. Antiseptic catheters were more effective in reducing S. epidermidiscolonization than standard catheters (4% vs 31%, p < 0.01). However, Gram-negative bacilli were responsible more often than Gram-positive cocci for catheter tip colonization (53% vs 46%) and they were responsible for all the bacteraemias (5.1%) related to catheters in the present study. We conclude that antiseptic-impregnated catheters could be more effective for Gram-positive cocci and could therefore be less effective in patients with high Gram-negative bacilli bloodstream infection prevalence, as burn patients are.
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Affiliation(s)
- G Ramos
- Burns Unit (C.E.P.A.Q.), Benaim Foundation, German Hospital, Buenos Aires, Argentina
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McCutchan FE, Hoelscher M, Tovanabutra S, Piyasirisilp S, Sanders-Buell E, Ramos G, Jagodzinski L, Polonis V, Maboko L, Mmbando D, Hoffmann O, Riedner G, von Sonnenburg F, Robb M, Birx DL. In-depth analysis of a heterosexually acquired human immunodeficiency virus type 1 superinfection: evolution, temporal fluctuation, and intercompartment dynamics from the seronegative window period through 30 months postinfection. J Virol 2005; 79:11693-704. [PMID: 16140747 PMCID: PMC1212589 DOI: 10.1128/jvi.79.18.11693-11704.2005] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [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: 12/17/2022] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1) superinfection refers to the acquisition of another strain by an already infected individual. Here we report a comprehensive genetic analysis of an HIV-1 superinfection acquired heterosexually. The infected individual was in a high-risk cohort in Tanzania, was exposed to multiple subtypes, and was systematically evaluated every 3 months with a fluorescent multi-region genotyping assay. The subject was identified in the window period and was first infected with a complex ACD recombinant strain, became superinfected 6 to 9 months later with an AC recombinant, and was monitored for >2.5 years. The plasma viral load exceeded 400,000 copies/ml during the first 9 months of infection but resolved to the set point of 67,000 copies/ml by 3 months after superinfection; the CD4 cell count was 377 cells/mul at 30 months. Viral diversity was evaluated with techniques designed to fully sample the quasi-species, permitting direct observation of the evolution, temporal fluctuation, and intercompartment dynamics of the initial and superinfecting strains and recombinants derived from them. Within 3 months of superinfection, seven different molecular forms were detected in gag and six were detected in env. The proportions of forms fluctuated widely over time in plasma and peripheral blood mononuclear cells, illustrating how challenging the detection of dually infected individuals can be. Strain-specific nested PCR confirmed that the superinfecting strain was not present until the 9 month follow-up. This study further defines the parameters and dynamics of superinfection and will foster appropriate studies and approaches to gain a more complete understanding of risk factors for superinfection and its impact on clinical progression, epidemiology, and vaccine design.
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Affiliation(s)
- F E McCutchan
- US Military HIV Research Program, 1600 E. Gude Drive, Rockville, MD 20850, USA.
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Martínez-Escoriza J, Ballester H, Ramos G, Rogel S, Sastre J, Abad J. Evaluación de las nuevas técnicas quirúrgicas para tratar la incontinencia urinaria femenina. Clínica e Investigación en Ginecología y Obstetricia 2005. [DOI: 10.1016/s0210-573x(05)73484-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Benarroch S, Smith M, Ramos G. Standardized protocol for the use of oral midazolam. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)80993-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Reyes JC, Moscoso M, Vélez CN, Rodríguez F, Colón HM, Robles R, Parrilla I, Ramos G, Suárez CM, Mercado H, Suárez RA. Risk and protective factors associated with youth violence among secondary school students in a nationally representative sample in Puerto Rico. Bol Asoc Med P R 2004; 96:253-60. [PMID: 15803985] [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: 05/02/2023]
Abstract
During the past decade, youth violence has received increasing attention as a major public health issue in Puerto Rico as well as in the United States. This study sought to identify risk and protective factors of youth violence in a representative sample of school adolescents in Puerto Rico. Risk and protective factors were grouped into five domains: individual, family, peer group, school and community. From a total of 2,385 participants, 10.7% reported at least one violent behavior and 3.4% reported two or more violent behaviors. In multiple regression analysis the risk factors identified were male gender, junior grade students, having a favorable attitude towards antisocial behavior, use of ecstasy, involvement with antisocial peers and reporting antisocial parents. Participation in family decisions was the only protective factor associated with violence. Findings from this study could have important implications for the development of preventive programs for the adolescent population in Puerto Rico.
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Affiliation(s)
- J C Reyes
- Department of Family Medical and Community Health, Universidad Central del Caribe, Bayamón, PR
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Hervás G, Frutos P, Ramos G, Giráldez F, Mantecón A. Intraruminal administration of two doses of quebracho
tannins to sheep: effect on rumen degradation and total
tract digestibility, faecal recovery and toxicity. J Anim Feed Sci 2004. [DOI: 10.22358/jafs/67393/2004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zazueta C, Ramos G, Fernández-Muñoz JL, Rodríguez ME, Acevedo-Hernández G, Pless RC. A Radioisotopic Study of the Entry of Calcium Ion into the Maize Kernel During Nixtamalization. Cereal Chem 2002. [DOI: 10.1094/cchem.2002.79.4.500] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- C. Zazueta
- Departamento de Bioquímica, Instituto Nacional de Cardiología, Mexico City, Mexico, C.P. 14080
| | - G. Ramos
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del I.P.N., Unidad Querétaro, José Siurob 10, Col. Alameda, Querétaro, Mexico, C.P. 76040
| | - J. L. Fernández-Muñoz
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del I.P.N., Unidad Querétaro, José Siurob 10, Col. Alameda, Querétaro, Mexico, C.P. 76040
| | - M. E. Rodríguez
- Laboratorio de Física Aplicada y Tecnología Avanzada, Instituto de Física, UNAM, Campus Juriquilla, Apdo. Postal 0-1010, Querétaro, Qro., Mexico
| | - G. Acevedo-Hernández
- Departamento de Ingeniería Genética de Plantas, CINVESTAV-Irapuato, A.P. 629, Irapuato, Guanajuato, Mexico, C.P. 36500
| | - R. C. Pless
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del I.P.N., Unidad Querétaro, José Siurob 10, Col. Alameda, Querétaro, Mexico, C.P. 76040
- Corresponding author. Phone/fax: 52-4422129466. E-mail:
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Frutos P, Hervás G, Ramos G, Giráldez F, Mantecón A. Condensed tannin content of several shrub species from a mountain area in northern Spain, and its relationship to various indicators of nutritive value. Anim Feed Sci Technol 2002. [DOI: 10.1016/s0377-8401(01)00323-6] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Affiliation(s)
- G Ramos
- Servicio de Cirugía Torácica, Hospital Universitario, Valladolid, Spain
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Santiago E, Mora L, Bautista M, Montesinos JJ, Martinez I, Ramos G, Zambrano IR, Manrique B, Weiss-Steider B. Granulocyte colony-stimulating factor induces neutrophils to secrete macrophage colony-stimulating factor. Cytokine 2001; 15:299-304. [PMID: 11594796 DOI: 10.1006/cyto.2001.0937] [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: 11/22/2022]
Abstract
In this work we provide evidence showing that granulocytes produce macrophage colony-stimulating factor (M-CSF) from the band cell stage and secrete this factor when induced to differentiate into polymorphonuclear cells by recombinant human granulocyte colony-stimulating factor (rhG-CSF). Using an enriched population of myeloid band cells from murine bone marrow, we identified the presence of M-CSF with a chromophore-labelled monoclonal anti-M-CSF antibody. Using ELISA we detected the secretion of M-CSF in the supernatants of cultures of enriched band cells when induced with rhG-CSF to differentiate into mature neutrophils. We also found that M-CSF is the only factor responsible for the colony forming activity in the supernatants and lysates of band cells treated with rhG-CSF.
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Affiliation(s)
- E Santiago
- Unidad de Investigación en Diferenciación Celular y Cáncer, Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, México D.F., México
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Abstract
BACKGROUND AND OBJECTIVES We did not find clinical studies of the alkalization of ropivacaine in the literature. The objectives of this study were: (1) to determine the quantity of sodium bicarbonate (NaHCO(3)), which alkalinizes 0.75% ropivacaine (with and without adrenaline); (2) to verify the physico-chemical alterations arising from this alkalization; and (3) to determine whether alkalinized ropivacaine produces a higher-quality epidural block measured via sensory-motor onset, block spread and anesthesia duration. METHODS It was determined in the laboratory that 0.012 and 0.015 mEq of NaHCO(3), respectively, alkalinized 10 mL of the 0.75% ropivacaine solutions without and with adrenaline (1:200,000). In the second phase, the study was random and double-blind and involved 60 patients divided into 3 groups of 20 (G1, G2, and G3). Via epidural lumbar blocks, these groups received, respectively, 10 mL of 0.75% ropivacaine plus 0.5 mL of 0.9% NaCl (solution A), 10 mL of 0.75% ropivacaine plus 0.0012 mEq of NaHCO(3) (solution B), and 10 mL of 0.75% ropivacaine (with adrenaline) plus 0.015 mEq of NaHCO(3) (solution C). The pH, PCO(2) (partial CO(2) pressure), and the nonionized fractions of the 0.75% ropivacaine solutions were compared before and after the addition of 0.9% NaCl or NaHCO(3) or adrenaline plus NaHCO(3). The motor and sensory onsets, block spread, and the duration of the block were evaluated. RESULTS The values of the pH, PCO(2), and nonionized fractions increased significantly in solutions B and C in relation to solution A. No differences among the groups were observed in relation to block spread and sensory-motor onset. The duration of the sensory blocks was significantly greater in the patients in groups G2 and G3. CONCLUSION This study indicates that the quantity of NaHCO(3) needed to alkalize 10 mL of 0.75% ropivacaine at room temperature is 0.012 mEq. When the solution contains adrenaline 1:200,000 (mg.mL(-1)), up to 0.015 mEq of NaHCO(3) may be added. The alkalization of the 0.75% ropivacaine solution did not cause a reduction of sensory-motor onset, but did provide a significant increase in the duration of the epidural block with no significant differences between the solutions with and without adrenaline.
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Affiliation(s)
- G Ramos
- Center of Teaching and Training in Anesthesiology, Orthopedic Hospital of Goiânia, Goiânia, Brazil
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Valladares JE, Riera C, González-Ensenyat P, Díez-Cascón A, Ramos G, Solano-Gallego L, Gállego M, Portús M, Arboix M, Alberola J. Long term improvement in the treatment of canine leishmaniosis using an antimony liposomal formulation. Vet Parasitol 2001; 97:15-21. [PMID: 11337123 DOI: 10.1016/s0304-4017(01)00389-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/20/2022]
Abstract
Pharmacokinetic and clinical effectiveness of liposome-encapsulated N-methylglucamine antimoniate (LMA) was performed in dogs suffering from experimental leishmaniosis. LMA was compared with N-methylglucamine antimoniate (MGA), the same drug in its free form. Sb plasma concentrations for LMA were always higher than those for MGA. Mean residence time (MRT), half-life time (t(1/2)) and clearance (Cl) showed that Sb was eliminated slower after liposome administration. The high volume of distribution (Vd) obtained with LMA suggests that Sb could achieve therapeutic concentrations in parasite-infected tissues. Average plasma concentration at steady state (Css(ave)) shows that Sb body concentrations after LMA treatment (9.8 mg/kg Sb, each 24h) would be effective in Leishmania infantum canine infection. Comparing LMA with MGA in a 1-year follow-up we observed no relapses for LMA and total protein and gammaglobulin concentrations were within normal range, while for MGA both began to rise 3 months after treatment. Use of antimonial liposomal formulations may restore effectiveness to an existing drug and reduce toxicity.
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Affiliation(s)
- J E Valladares
- Departament de Farmacologia i Terapèutica, Facultat de Veterinària, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
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Abstract
Hydatid infestation of the lung can be primary or secondary. In three of four cases the cyst is a single one. Hydatidosis of a different location, particularly the liver, may be associated. The period of initial growth of primary hydatidosis is frequently asymptomatic. Bronchial fistulization is an important event in the evolution of the cyst. Intrapleural rupture constitutes a rare eventuality, but it is often as characteristic as it is severe. Secondary, metastatic hydatidosis, due to breaking of a primary visceral cyst in a vein or heart, is rare. A special form is so-called multiple malignant pulmonary hydatidosis, which causes progressive respiratory deficiency and right ventricular failure. There are a variety of radiographic images. Ultrasonography, computed tomography, and magnetic resonance imaging can recognize certain details of the lesions and discover others that are not visible by conventional radiography. For a specific serologic diagnosis, our experience favors the immunoglobulin G enzyme-linked immunosorbent assay and immunoelectrophoresis. Treatment is essentially surgical. In general, chemotherapy is used as a complement to operative treatment to avoid recurrence. Surgery has two objectives: to remove the parasite and to treat the bronchipericyst pathology and other associated lesions. The prognosis has changed during the last few years, and results are now commonly satisfactory. The most frequent complications are pleural infection and prolonged air leakage. Operative mortality does not exceed 1% to 2%. Despite the low mortality and the limited recurrence rate, it is necessary to remember the invading character of pulmonary hydatid disease, which sometimes makes therapy difficult and questionable. Prophylaxis is essential to eradicate the disease completely.
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Affiliation(s)
- G Ramos
- Thoracic Surgery Service, University Hospital, Valladolid, Spain.
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Ramos G, Santiago E, Martínez I, Zambrano I, Manrique B, Weiss B. [Sodium caseinate induces differentiation of 32D pluripotential hematopoietic cells]. Rev Invest Clin 2000; 52:638-44. [PMID: 11256107] [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: 02/19/2023]
Abstract
AIM To determine the role of sodium caseinate (CasNa) in the modulation of hemopoiesis. MATERIALS AND METHODS 32D cells, a murine hemopoietic multipotential cell line dependent on interleukin-3 (IL-3) for proliferation and survival, were used. These cells were cultured with 0.5 ng/mL of IL-3, together with different concentrations of CasNa. We evaluated: proliferation (direct counting under the microscope and use of thymidine 3H), morphological differentiation (giemsa staining), cytochemistry (specific staining for monocytes and granulocytes), and function (presence of Fc receptors and reduction of nitro-blue tetrazolium). In addition, we determined cell viability through trypan blue exclusion and apoptosis using the TUNEL assay in situ. RESULTS We showed that CasNa induced a decrease in cell proliferation, which is dose dependent, and is neither a result of a diminished cell viability, nor due to an increase in cell death through apoptosis. In addition, CasNa induces cell differentiation towards the monocytic lineage. CONCLUSIONS CasNa has the capacity to differentiate 32D cells towards the monocytic lineage, and, importantly, has a potent differentiating activity on 32D cells being able to promote differentiation in a shorter time than the well known factors G-CSF and GM-CSF.
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Affiliation(s)
- G Ramos
- Unidad de Investigación en Diferenciación Celular y Cáncer, FES-Zaragoza, UNAM, México, D.F
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Duque Medina JL, Ramos G, San Román JA, López A, García-Yuste M, Heras F, Cerezal J, Matilla JM. [Assessment of mediastinal tumor involvement (T factor) in lung cancer with transesophageal ultrasonography]. Arch Bronconeumol 2000; 36:455-9. [PMID: 11004987] [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
UNLABELLED Transesophageal sonography was originally used to assess esophageal-gastric neoplasm. The technique may also be useful in the evaluation of pulmonary neoplasms for possible mediastinal involvement, with regard to both T and N factors. OBJECTIVE To consider the validity of this minimally-invasive technique for assessing possible mediastinal involvement by direct tumoral invasion (T4) and to help obtain the most accurate staging of lung cancer. PATIENTS AND METHODS Sixteen patients with confirmed histopathological diagnoses of pulmonary neoplasm were examined by transesophageal sonography in order to evaluate possible mediastinal involvement. They had previously been classified by computed tomography as T4 (12 patients) or possible T4 (4 patients). Mediastinal involvement was also assessed by mediastinotomy or thoracotomy in 15 of the 16 patients. RESULTS Transesophageal sonography revealed mediastinal involvement in eight of the 16 patients; the rest had no such involvement. Surgical exploration of the mediastinum confirmed involvement in seven of those who had been so classified by sonography (with the remaining patient not having been assessed surgically). Among the eight patients who were considered free of mediastinal involvement, there was in fact none, although we found previously undetected infiltration of the posterior surface of the right pulmonary artery in one patient. Sensitivity was 87.5%, specificity 100% and accuracy 93.3%. CONCLUSION Transesophageal ultrasound is a diagnostic tool that can provide additional information to complement other diagnostic strategies.
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Affiliation(s)
- J L Duque Medina
- Servicio de Cirugía Torácica, Hospital Universitario de Valladolid
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García-Yuste M, Matilla JM, Alvarez-Gago T, Duque JL, Heras F, Cerezal LJ, Ramos G. Prognostic factors in neuroendocrine lung tumors: a Spanish Multicenter Study. Spanish Multicenter Study of Neuroendocrine Tumors of the Lung of the Spanish Society of Pneumonology and Thoracic Surgery (EMETNE-SEPAR). Ann Thorac Surg 2000; 70:258-63. [PMID: 10921719 DOI: 10.1016/s0003-4975(00)01369-2] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND This study examines the experience of the Spanish Multicenter Study of Neuroendocrine Tumors of the Lung through the clinical data and behavior of patients treated for this pathologic process. METHODS From 1980 to 1997, 361 cases of neuroendocrine carcinomas (NEC) were treated surgically. Patients were enrolled in a protocol using the pathologic and follow-up reports. According to Dreslers' criteria, the cases were segregated into grade 1 (typical carcinoid), grade 2 (atypical carcinoid), grade 3 large cell type, and grade 3 small cell type. Several variables were reviewed in all patients. Statistical analysis was performed to determine whether clinical characteristics and differentiation were associated with significant differences in the prognosis. RESULTS A total of 261 cases of NEC were identified with grade 1, 43 with grade 2, and with grade 3: 22 of large and 35 of small cells. Five-year survival for different grades was as follows: grade 1, 96%; 2, 72%; 3 large cell type, 21%; and 3 small cell type, 14%. When a comparative analysis between typical and atypical carcinoids was performed a significant difference for mean age, tumor size, nodal metastases, and recurrence was observed. However, female sex, nodal metastases, and recurrence rate differed between atypical carcinoids and grade 3 NEC of large cells. A difference in recurrence rate was found between patients with both types of grade 3 NEC. CONCLUSIONS The progressive deterioration of tumor organization highlights that neuroendocrine tumors constitute a continuous spectrum. A careful observation of pathologic findings is necessary to individualize their prognostic factors.
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Affiliation(s)
- M García-Yuste
- Services of Thoracic Surgery and Pathology, University Hospital, Valladolid, Spain
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Solano-Gallego L, Llull J, Ramos G, Riera C, Arboix M, Alberola J, Ferrer L. The Ibizian hound presents a predominantly cellular immune response against natural Leishmania infection. Vet Parasitol 2000; 90:37-45. [PMID: 10828510 DOI: 10.1016/s0304-4017(00)00223-5] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.1] [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: 10/17/2022]
Abstract
Veterinarians working in the Balearic Islands (Mallorca), an endemic region of canine leishmaniosis, have reported very few cases of leishmaniosis in Ibizian hounds while concurrently observing that dogs of other breeds had a high incidence of clinical canine leishmaniosis. To further investigate this observation, two populations of dogs from the Balearic Islands were examined for the presence of Leishmania-specific cellular immunity using a delayed type hypersensitivity test (DTH) to leishmanin and for the presence of Leishmania-specific humoral immunity using an ELISA. Fifty-six asymptomatic dogs, 31 Ibizian hounds and 25 dogs belonging to other breeds were examined. Seventy-seven percent of the dogs demonstrated a specific immune response against Leishmania, either humoral or cellular. This finding suggests that the infection rate (77%) was higher than previously considered. For Ibizian hounds 81% were DTH positive while only 48% of the other dogs were DTH positive. A statistical association between Ibizian hounds and positive DTH response was found. A specific humoral response was found in 48% of Ibizian hounds and in 56% of the other dogs. No statistical association relative to the Leishmania-specific IgG1 and IgG2 levels were found between the two groups. The Ibizian hound has been reported to be more resistant to Leishmania infection and we found that the Ibizian hound mounts a significant cellular response to infection. Thus, the Ibizian hound may be an interesting canine model for the investigation of protective anti-Leishmania immune response.
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Affiliation(s)
- L Solano-Gallego
- Departament de Farmacologia i Terapèutica, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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García-Yuste M, Matilla JM, Duque JL, Heras F, Cerezal LJ, Ramos G. [Surgical treatment of lung cancer: comparative assessment of the staging systems of 1986 and 1997. Results in 500 consecutive patients]. Arch Bronconeumol 2000; 36:245-50. [PMID: 10916664 DOI: 10.1016/s0300-2896(15)30165-4] [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: 11/24/2022]
Abstract
OBJECTIVE To evaluate the influence of different variables on survival in relation to the staging guidelines of 1986 and 1997. PATIENTS AND METHODS Five hundred patients (473 men and 27 women) with non-small cell lung cancer were treated surgically from 1980 to 1997. Resections performed: 184 lobectomies, 16 bi-lobectomies, 244 pneumonectomies, 2 bronchoplastic lobectomies, and 54 segmentectomies. HISTOLOGY 338 epidermoid, 86 adenocarcinoma, 40 giant cell, 36 mixed tumor. Differentiation: 216 N1, 91 N2, 193 N3. Stages according to 1986 guidelines were I: 246 (49.2%) (T1: 32, T2: 214); II: 27 (5.4%); IIIa: 197 (39.4%) (N0: 84; N1: 2; N2: 111); IIIb: 23 (4.6%) (N0: 12; N2: 11); and IV: 7 (1.4%) (N0: 4; N2: 3). Stages according to the 1997 guidelines were used for comparison of survival between patients with Ia and Ib tumors and with IIb and IIIa tumors. RESULTS With follow-up periods ranging from 2 to 17 years, 141 patients (28%) were alive, 26 (5%) were lost to follow-up and 333 had died. Two patients (0.4%) died during surgery and 36 (7.2%) died during the postoperative period. Among the remaining 462 patients, 295 deaths were related to the following causes: metastasis in 130 cases (44%), recurrence in 81 cases (27%), functional causes in 17 (6%), independent causes in 54 (18%) and unknown causes in 13 (4%). Overall survival rates at 5 and 10 years were 36 and 26%, respectively; survival rates by histological type: epidermoid 36 and 26%, adenocarcinoma 35 and 26%; stage I, 51 and 41% (Ia, 81 and 75%; Ib, 44 and 33%); IIIa 24 and 15% (IIb of 1997: 27 and 17%; IIIa of 1997: 20 and 13%). Survival by N factor: N0, 44 and 34%; N2, 17 and 8% (1986) and 17 and 11% (1997). CONCLUSIONS Survival agrees with other studies. The 1997 staging guidelines are useful for differentiating survival between stages Ia and Ib and between IIb and IIIa. N and T factors, histology and stage influence the appearance of metastasis; T factor influences recurrence.
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Affiliation(s)
- M García-Yuste
- Servicio de Cirugía Torácica, Hospital Universitario, Valladolid
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Graham J, Awe SO, LeDay AM, Rice JC, Ramos G, Harris LC, Opere CA, Ohia SE. Effect of inhibition of cyclooxygenase on pre- and postjunctional actions of peroxides in the iris-ciliary body. Neurochem Res 2000; 25:519-25. [PMID: 10823585 DOI: 10.1023/a:1007568227387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In the present study, we investigated the effect of inhibition of cyclooxygenase (COX) with flurbiprofen (FBF) on peroxide-induced enhancement of field-stimulated [3H]norepinephrine ([3H]NE) release from bovine isolated irides. Furthermore, the effect of FBF was examined on peroxide-induced attenuation of contractions evoked by carbachol on this tissue. Irides were prepared for studies of neurotransmitter release and for measurement of contractile tension in vitro. Pretreatment of tissues with FBF (10 microM) caused significant (P < 0.001) rightward shifts of concentration-response curves to H2O2 and also decreased cumene hydroperoxide (cuOOH)-induced enhancement of evoked [3H]NE release. FBF (10 microM) partially prevented the attenuation of carbachol-induced contractions induced by H2O2 (300 microM) and cuOOH (300 microM). We conclude that inhibition of the biosynthesis of prostanoids reduced both the prejunctional stimulatory effects of H2O2 and cuOOH on sympathetic neurotransmission and inhibitory effects of peroxides on carbachol-induced contractions the in the bovine isolated iris.
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Affiliation(s)
- J Graham
- Department of Pharmaceutical and Administrative Sciences, School of Pharmacy and Allied Health Professions, Creighton University, Omaha, NE 68178, USA
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Abstract
Hydatidosis in humans is a parasitic disease produced by cystic growth of the larvae of the tapeworm Echinococcus granulosus, affecting mainly the liver and lung. Larvae are rarely present in the mediastinum, although approximately 100 cases have been described in the literature. We report eight cases of hydatid cysts of the mediastinum (HCM) treated surgically over a period of 21 years. The incidence was similar in males and females and ages ranged from 10 to 74 years. Symptoms depend on size, location and involvement of neighboring structures in HCM. The most serious complication is cyst rupture with consequent transfer of hydatid material to the blood, possibly causing anaphylactic shock and even death. Currently, sonography, computed tomography and magnetic resonance images facilitate diagnosis. Treatment involves excision of the cyst and peri-cystic tissue. CHM should be suspected when mediastinal cysts are found in countries where the incidence of hydatidosis is high.
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Affiliation(s)
- F Heras
- Servicio de Cirugía Torácica, Hospital Universitario de Valladolid
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43
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Abstract
We present an analysis of the heart rate variability during the Valsalva manoeuvre. The more frequently used time-frequency distributions were applied in order to analyse the dynamical behaviour of several spectral indexes during the manoeuvre. The influence of the branches of the autonomous system can be predicted following the evolution of the studied indexes. The exponential time-frequency distribution showed the best results in the graphical representation, as well as in the indexes calculation. The total power, the low-to-high frequency ratio and the fractal dimension were analysed throughout the different phases of the manoeuvre and a representative model of these parameters' evolution was proposed.
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Affiliation(s)
- G Ramos
- Laboratorio de Fisiología Cardiopulmonar, Universidad Autónoma Metropolitana-Iztapalapa, México, D.F., México
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Zarzosa MP, Orduña Domingo A, Gutiérrez P, Alonso P, Cuervo M, Prado A, Bratos MA, García-Yuste M, Ramos G, Rodríguez Torres A. Evaluation of six serological tests in diagnosis and postoperative control of pulmonary hydatid disease patients. Diagn Microbiol Infect Dis 1999; 35:255-62. [PMID: 10668582 DOI: 10.1016/s0732-8893(99)00079-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Latex agglutination (LA), passive hemagglutination (PHA), immunoelectrophoresis (IEP) and specific IgE, IgM, IgG enzyme-linked immunosorbent assay (ELISA) tests for diagnosis and postoperative follow-up of 79 patients with surgically confirmed pulmonary hydatidosis were evaluated. Specific IgG ELISA was the most sensitive test (83.5%) and the least sensitive tests were specific IgE ELISA (44.3%) and IEP (50.6%). The specificity obtained for all the serologic test was above 97% in all cases. The greatest number of false positives in all tests (except IEP) occurred in patients with Taenia saginata and Taenia solium cysticerci infestations and in patients with lymphoma and leukemia. Specific IgG ELISA demonstrated the highest negative predictive value (93.8%). No statistically significant differences (p > 0.050) were found in the sensitivity of the tests when patients with only one cyst and patients with various cysts were compared. Considering only the patients without relapse, the percentage of seropositive patients increased in all tests at 1 and 3 months after surgery. After that time the percentage of seropositive patients decreased. At 48 months after surgery all patients without relapse became negative in IEP, specific IgE ELISA, and specific IgM ELISA. The antibody titers in all seropositive patients increased during the 3 months after surgery. From these 3 months onward, antibody levels decreased in all serologic tests studied in the group of patients without relapse. The patients who had relapses during the first year after surgery presented persistently elevated antibody titers in all postoperative sera. The antibody titers of the patients who relapsed between the third and fourth years after surgery decreased progressively the third month after surgery, and increased in the serum obtained at the moment of relapse diagnosis. Our results show that persistence of elevated antibody titers in patients with pulmonary hydatidosis in the year after surgery or titer increase after a progressive decrease are indicative of relapse or reinfection.
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Affiliation(s)
- M P Zarzosa
- Departmento Microbiología, Hospital Universitario, Facultad de Medicina, Valladolid, Spain
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Ramos G, Cuenca-Estrella M, Monzón A, Rodríguez-Tudela JL. In-vitro comparative activity of UR-9825, itraconazole and fluconazole against clinical isolates of Candida spp. J Antimicrob Chemother 1999; 44:283-6. [PMID: 10473237 DOI: 10.1093/jac/44.2.283] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
UR-9825 is a new broad-spectrum triazole antifungal agent with a good pharmacokinetic profile and excellent bioavailability. It shows high in-vitro activity and efficacy in models of systemic candidosis in rats and rabbits, comparing favourably with fluconazole. The purpose of this study was to evaluate the in-vitro activity of UR-9825 and to compare it with that of fluconazole and itraconazole against 283 clinical isolates of Candida spp. UR-9825 was more potent against Candida spp. than both fluconazole and itraconazole, even against some Candida albicans and Candida krusei isolates with decreased susceptibility to fluconazole (MIC 16 mg/L).
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Affiliation(s)
- G Ramos
- Unidad de Micología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
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Marquez Acosta M, Yépez Rivas RD, Rivas de Yépez CE, de Naranjo RS, Ramos G, Rincón Silva M, Díaz N, Pontiles M. [Estimating height and body weight from knee height and mid arm circumference in children 9 to 14 years old]. Arch Latinoam Nutr 1998; 48:197-200. [PMID: 9951530] [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: 02/10/2023]
Abstract
Some individuals with functional limitations or in some clinical or field areas have troubles to get stature and body weight measurement done. It does exist the alternative of estimating these variables from measurements of body segments like knee height (KH) and mid arm circumference (MAC). Of a sample of 113 healthy Venezuelan children, both sexes, 9 to 14 years of age, equations suggested by Ross Laboratories for estimating stature and body weight were applied. It was concluded that the need for an adjustment was evident which done using multiple regression analysis. This allowed us to generate estimated stature an weight by KH and MAC tables, for Venezuelan children.
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Affiliation(s)
- M Marquez Acosta
- Universidad de Carabobo y Unidad de Investigaciones en Nutrición
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Alcalá L, García-Garrote F, Cercenado E, Peláez T, Ramos G, Bouza E. Comparison of broth microdilution method using Haemophilus test medium and agar dilution method for susceptibility testing of Eikenella corrodens. J Clin Microbiol 1998; 36:2386-8. [PMID: 9666033 PMCID: PMC105059 DOI: 10.1128/jcm.36.8.2386-2388.1998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Susceptibility testing of Eikenella corrodens is usually performed by a Mueller-Hinton sheep blood agar dilution (AD) method. However, this method is impractical for testing only a few strains. We compared AD with the broth microdilution method using Haemophilus test medium (HTM) in order to determine the susceptibility of 36 clinical isolates of E. corrodens to eight antimicrobial agents. MICs obtained by the HTM method yielded 95.5 and 84% agreement (within 2 and 1 log2 dilutions, respectively) with those obtained by AD. The HTM method with incubation in CO2 for 48 h was highly reproducible and constitutes an easy alternative for antimicrobial susceptibility testing of E. corrodens.
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Affiliation(s)
- L Alcalá
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
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48
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Remião F, Ferreira H, Ramos G, Carvalho F, Bastos M. Inhibition of glutathione reductase by isoproterenol oxidation products. Toxicol Lett 1998. [DOI: 10.1016/s0378-4274(98)80380-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
BACKGROUND The purpose of this study is to report our 15-year experience treating chronic empyemas after pulmonary resection and tuberculosis. METHODS Open-window thoracostomy and thoracomyoplasty were used to treat 40 patients with chronic pleural empyema characterized by residual empyematic cavity, bronchopleural fistula, and persistent pleural infections that were secondary to tuberculosis (n = 22) or pulmonary resection (n = 18). Between 2 and 7 months after thoracostomy, thoracomyoplasty was performed to eliminate a persistent pleural cavity. In 2 patients with postpulmonary resection empyema and a large bronchopleural fistula, intrathoracic transposition of the latissimus dorsi flap and open-window thoracostomy were performed simultaneously to close the fistula. RESULTS The pleural space was eliminated per primam intentionem in 21 of 22 patients with tuberculosis and in 14 of 18 with a postpulmonary resection empyema. Another myoplasty was performed in an additional 3 patients to eliminate the pleural space. During open-window thoracostomy, the latissimus dorsi muscle was preserved with minimal injury to the anterior serratus muscle. One patient died postoperatively. CONCLUSIONS Successful treatment of chronic pleural empyema requires adequate timing of surgical procedures. Our two-procedure technique is relatively simple and safe.
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Affiliation(s)
- M García-Yuste
- Thoracic Surgery Service, University Hospital, Valladolid, Spain
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50
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Martin-Mateo MC, Molpeceres LM, Ramos G. Assay for erythrocyte superoxide dismutase activity in patients with lung cancer and effects on pollution and smoke trace elements. Biol Trace Elem Res 1997; 60:215-26. [PMID: 9494059 DOI: 10.1007/bf02784441] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The antioxidative effect of CuZnSOD, which catalyzes the dismutation of superoxide anion (O2-), provides a defense against the oxygen toxicity. The object of the study is to evaluate the erythrocytes superoxide dismutase (SOD) activity in two groups of persons (Group I, healthy blood donors; Group II, lung cancer patients), using the spectrophotometric assay of NADH oxidation and the indirect method. The effect of trace elements, such as Al3-, Cr3+, Fe3+, Hg2+, NI2+, and Pb2+ (producing free radicals oxygen and present in pollution and smoke) is also evaluated. The results show the decrease of SOD activity in lung cancer patients with respect to healthy individuals. Likewise, in those patients the enzymatic activity is bigger in early stage (I,II) with respect to advanced one (III) (p < 0.05). The lesser activity when the samples are incubated with Ni or Pb point out that these metals play a role in neoplasm development. In short, the oxidant-antioxidant balance is altered in lung cancer patients.
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MESH Headings
- Adenocarcinoma/blood
- Adenocarcinoma/enzymology
- Adenocarcinoma/etiology
- Aged
- Carcinoma, Large Cell/blood
- Carcinoma, Large Cell/enzymology
- Carcinoma, Large Cell/etiology
- Carcinoma, Non-Small-Cell Lung/blood
- Carcinoma, Non-Small-Cell Lung/enzymology
- Carcinoma, Non-Small-Cell Lung/etiology
- Carcinoma, Small Cell/blood
- Carcinoma, Small Cell/enzymology
- Carcinoma, Small Cell/etiology
- Carcinoma, Squamous Cell/blood
- Carcinoma, Squamous Cell/enzymology
- Carcinoma, Squamous Cell/etiology
- Environmental Pollutants/adverse effects
- Environmental Pollutants/analysis
- Erythrocytes/drug effects
- Erythrocytes/enzymology
- Female
- Free Radicals
- Humans
- Lung Neoplasms/blood
- Lung Neoplasms/enzymology
- Lung Neoplasms/etiology
- Male
- Middle Aged
- NAD/chemistry
- Neoplasm Staging
- Oxidation-Reduction
- Spectrophotometry, Ultraviolet
- Superoxide Dismutase/blood
- Tobacco Smoke Pollution/adverse effects
- Tobacco Smoke Pollution/analysis
- Trace Elements/adverse effects
- Trace Elements/analysis
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Affiliation(s)
- M C Martin-Mateo
- Department of Biochemistry, Molecular Biology & Physiology, Faculty of Science, Paseo del Prado de la Magdalena s/n, Valladolid, Spain
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