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Franck D, Meisenberg O, Beaumont T, Buchholz W, López MA, Navarro JF, Pérez B, Hürkamp K, Breustedt B, Vanhavere F. The European intercomparison of in-vivo monitoring laboratories: the EIVIC-2020 project. Radiat Environ Biophys 2024; 63:165-179. [PMID: 38413426 PMCID: PMC10920490 DOI: 10.1007/s00411-024-01060-9] [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] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/12/2024] [Indexed: 02/29/2024]
Abstract
The EIVIC project was launched in 2020, and the main goal was the organisation of a European intercomparison of in-vivo monitoring laboratories dealing with direct measurements of gamma-emitting radionuclides incorporated into the body of exposed workers. This project was organised jointly by members of EURADOS Working Group 7 on internal dosimetry (WG7), the Federal Office for Radiation Protection (BfS, Germany) and the Radioprotection and Nuclear Safety Institute (IRSN, France). The objective was to assess the implementation of individual-monitoring requirements in EU Member States on the basis of in-vivo measurements and to gain insight into the performance of in-vivo measurements using whole-body counters. In this context, a total of 41 in-vivo monitoring laboratories from 21 countries, together with JRC (EC) and IAEA participated. The results were submitted in terms of activity (Bq) of the radionuclides identified inside phantoms that were circulated to all participants. The measured data were compared with reference activity values to evaluate the corresponding bias according to the standards ISO 28218 and ISO 13528. In general, the results of the different exercises are good, and most facilities are in conformity with the criteria for the bias and z-scores in the ISO standards. Furthermore, information about technical and organisational characteristics of the participating laboratories was collected to test if they had a significant influence on the reported results.
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Affiliation(s)
- D Franck
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 92260, Fontenay-aux-Roses, France
| | - O Meisenberg
- Federal Office for Radiation Protection (BfS), 85764, Oberschleißheim, Germany.
| | - T Beaumont
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 92260, Fontenay-aux-Roses, France
| | - W Buchholz
- Federal Office for Radiation Protection (BfS), 85764, Oberschleißheim, Germany
| | - M A López
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040, Madrid, Spain
| | - J F Navarro
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040, Madrid, Spain
| | - B Pérez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040, Madrid, Spain
| | - K Hürkamp
- European Radiation Dosimetry Group e. V. (EURADOS), 85764, Oberschleißheim, Germany
| | - B Breustedt
- KIT-Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - F Vanhavere
- Belgian Nuclear Research Centre (SCKCEN), 2400, Mol, Belgium
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Mariscal G, Nuñez JH, Figueira P, Malo A, Montiel V, López MA, Castro M, Barrios C, Fern PD. Validation of the concavity-convexity quotient as a new method to measure the magnitude of scoliosis. J Craniovertebr Junction Spine 2020; 11:31-35. [PMID: 32549710 PMCID: PMC7274366 DOI: 10.4103/jcvjs.jcvjs_22_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 02/25/2020] [Indexed: 11/04/2022] Open
Abstract
Objectives We propose a novel and simple method to determine the magnitude of the curve in scoliosis and its correlation with the Cobb angle. Methods Using multiple rounds of nominal group technique and an established consensus-building methodology, a multidisciplinary research group identified a simple method to value the curve deformity based on the vertebral pedicles. Measurements A mathematical study was performed to determine the relationship between the Cobb angle and the concavity-convexity quotient (CCQ). To evaluate the clinical correlation between the Cobb angle and CCQ, spine surgeons measured 48 curves (before and after follow-up) of congenital scoliosis. Results This quotient reflects the ratio between the distance from the upper end of the most inclined upper vertebra to the lower end of the most inclined lower vertebra on the concave side (A-distance) and the corresponding distance on the convex side of the curve (B-distance). The existing mathematical relationship is based on changing the explicit coordinates to polar coordinates. Finally, the clinical correlation between the Cobb angle and CCQ was statistically significant (r = -0.688; P < 0.001 in first measure and r = -0.789; P < 0.001 in the second measure). Conclusions Our study provides Level III evidence that CCQ represents a promising alternative or a complementary method to the traditional Cobb angle due to its simple and reliable ability to measure the magnitude of the curve.
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Affiliation(s)
- Gonzalo Mariscal
- Institute for Research on Musculoskeletal Disorders, Valencia Catholic University, Valencia, Spain
| | - Jorge H Nuñez
- Department of Traumatology and Orthopedic Surgery, University Hospital Sant Joan de Deu, L'Hospitalet de Llobregat, Terrassa, Spain.,Spine Unit, Department of Traumatology and Orthopedic Surgery, Spine Unit, University Hospital of Mutua Terrassa, Terrassa, Spain
| | - Paulo Figueira
- Department of Orthopedic Surgery, Curry Cabral Hospital, Lisbon, Portugal
| | - Ana Malo
- Department of Traumatology and Orthopedic Surgery, University of Navarra Clinic, Pamplona, Spain
| | - Verónica Montiel
- Department of Traumatology and Orthopedic Surgery, University Hospital Sant Joan de Deu, L'Hospitalet de Llobregat, Terrassa, Spain
| | - Miguel A López
- Department of Mathematics, Polytechnic University School, Castilla-La Mancha University, Ciudad Real, Coruña, Spain
| | - Miguel Castro
- Departmet of Orthopedic Surgery, A Coruña University Hospital, Coruña, Spain
| | - Carlos Barrios
- Institute for Research on Musculoskeletal Disorders, Valencia Catholic University, Valencia, Spain
| | - Pedro Domenech Fern
- Department of Orthopedic Surgery, University and Polytechnic La Fe Hospital, Valencia, Spain
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Pérez López B, Navarro JF, López MA. METHODOLOGY AT CIEMAT WHOLE BODY COUNTER FOR IN VIVO MONITORING OF RADIOIODINE IN THE THYROID OF EXPOSED POPULATION IN CASE OF NUCLEAR EMERGENCY. Radiat Prot Dosimetry 2018; 182:171-176. [PMID: 29584908 DOI: 10.1093/rpd/ncy045] [Citation(s) in RCA: 2] [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: 11/29/2017] [Accepted: 03/01/2018] [Indexed: 06/08/2023]
Abstract
Iodine-131 is one of the main concerns from the point of view of radiological protection in a short term after a nuclear accident. The WBC Laboratory of CIEMAT has developed a methodology for in vivo monitoring of radioiodine in the thyroid of exposed individuals in case of emergency. Thyroid-neck phantoms of different sizes are required for calibrating the detection systems in appropriate counting geometries for the measurement of exposed population. A Low-Energy Germanium (LEGe) detector and a Fastscan Counter were calibrated using a set of thyroid phantoms fabricated by CIEMAT. Each neck phantom consists of a Lucite cylinder with a vial source of 131I. Counting efficiencies depending on age and thyroid sizes were obtained to be used to determine the activity of 131I in internally contaminated people. DL of 131I varies with the age, being in the range of 5-8 Bq for the LEGe detector and 26-42 Bq for the Fastscan. Detection of intakes resulting in Committed Effective doses far below 1 mSv are guaranteed for thyroid monitoring in a few days after the accidental exposure assuming a scenario of acute inhalation or ingestion of 131I by members of the public.
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Affiliation(s)
- B Pérez López
- Whole Body Counter, Internal Dosimetry Service, Radiation Dosimetry Unit (CIEMAT), Avda. Complutense 40, Madrid, Spain
| | - J F Navarro
- Whole Body Counter, Internal Dosimetry Service, Radiation Dosimetry Unit (CIEMAT), Avda. Complutense 40, Madrid, Spain
| | - M A López
- Whole Body Counter, Internal Dosimetry Service, Radiation Dosimetry Unit (CIEMAT), Avda. Complutense 40, Madrid, Spain
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Guadalajara N, López MA. THE INFLATED VALUATION PROBLEM IN VALENCIA, SPAIN, AND IMPLICATIONS FOR FIRM SIZE. International Journal of Strategic Property Management 2018. [DOI: 10.3846/ijspm.2018.4348] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Home purchase-sale prices have been widely modeled by several authors. Nonetheless, other values exist, such as home mortgage appraisal values, used by financial institutions, which have played a key role in the recent financial crisis. This article attempts to model the appraisal price of one m2 of residential properties obtained by 31 appraisal companies in Valencia (Spain). Mortgage appraisal values of 17 007 residential properties were used for this purpose. Spatial autocorrelation was detected in both the data and residuals of the ordinary regression model, which justified using spatial regression models. Of the four employed models, the error model offered the best results. Significant differences were found among appraisal companies, which varied as much as 83% for some. Generally speaking, small appraisal companies obtained higher over-valuation percentages, which confirms their situation of weakness. The fact that over-valuations exist in mortgage securities is a high risk for a stable financial system.
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Rebollo S, Jiménez R, Ortín A, Andreu E, Gil B, López MA, Royo-Villanova M, Capilla L, Rodríguez JJ, Martínez-Pellús A. Impact of implementation of a ventilator-associated pneumonia prevention bundle that includes selective digestive decontamination in a southern region of Spain. Intensive Care Med Exp 2015. [PMCID: PMC4796212 DOI: 10.1186/2197-425x-3-s1-a705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sotelo G, Andree KB, López MA, Alexandrino P, Gisbert E, Faria R. The puzzling demographic history and genetic differentiation of the twaite shad (Alosa fallax) in the Ebro River. CONSERV GENET 2014. [DOI: 10.1007/s10592-014-0597-9] [Citation(s) in RCA: 3] [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: 11/24/2022]
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Santos C, Fregel R, Cabrera VM, Álvarez L, Larruga JM, Ramos A, López MA, Pilar Aluja M, González AM. Mitochondrial DNA and Y-chromosome structure at the mediterranean and atlantic façades of the iberian peninsula. Am J Hum Biol 2013; 26:130-41. [DOI: 10.1002/ajhb.22497] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 10/31/2013] [Accepted: 12/07/2013] [Indexed: 01/24/2023] Open
Affiliation(s)
- Cristina Santos
- Unitat Antropologia Biològica; Departament de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
| | - Rosa Fregel
- Department of Genetics; University of La Laguna; 38271 Tenerife Canary Islands Spain
| | - Vicente M. Cabrera
- Department of Genetics; University of La Laguna; 38271 Tenerife Canary Islands Spain
| | - Luis Álvarez
- Unitat Antropologia Biològica; Departament de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
- IPATIMUP; Institute of Molecular Pathology and Immunology of the University of Porto; 4200-465 Porto Portugal
| | - Jose M. Larruga
- Department of Genetics; University of La Laguna; 38271 Tenerife Canary Islands Spain
| | - Amanda Ramos
- Unitat Antropologia Biològica; Departament de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
- Centre of Research in Natural Resources (CIRN), Department of Biology; University of the Azores; 9500-321 Ponta Delgada Portugal
- Molecular and Cellular Biology Institute (IBMC); University of Porto; 4150-180 Porto Portugal
| | - Miguel A. López
- Clinical Management and Biotechnology Unit; Torre Cárdena Hospital; 04008 Almería Spain
| | - María Pilar Aluja
- Unitat Antropologia Biològica; Departament de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
| | - Ana M. González
- Department of Genetics; University of La Laguna; 38271 Tenerife Canary Islands Spain
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Andree KB, López MA. Species identification from archived snail shells via genetic analysis: a method for DNA extraction from empty shells. Molluscan Research 2013. [DOI: 10.1080/13235818.2012.754141] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rodríguez-Gómez J, Mompó B, Gredilla E, López MA, Gilsanz F. [Massive obstetric haemorrhage in a patient with placenta percreta]. Rev Esp Anestesiol Reanim 2012; 59:452-455. [PMID: 22632905 DOI: 10.1016/j.redar.2012.03.011] [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] [Received: 12/02/2011] [Accepted: 03/08/2012] [Indexed: 06/01/2023]
Abstract
We present a case of a 38 year-old patient with prenatal diagnosis of placenta praevia. When the elective caesarean began it was found a placenta accreta. In spite of an emergency hysterectomy, embolisation using interventional radiography was needed after a massive obstetric haemorrhage. The post-operative period progressed without incidents.
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López MA, Vicente J, Kulasekaran S, Vellosillo T, Martínez M, Irigoyen ML, Cascón T, Bannenberg G, Hamberg M, Castresana C. Antagonistic role of 9-lipoxygenase-derived oxylipins and ethylene in the control of oxidative stress, lipid peroxidation and plant defence. Plant J 2011; 67:447-58. [PMID: 21481031 DOI: 10.1111/j.1365-313x.2011.04608.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
9-lipoxygenases (9-LOXs) initiate fatty acid oxygenation in plant tissues, with formation of 9-hydroxy-10,12,15-octadecatrienoic acid (9-HOT) from linolenic acid. A lox1 lox5 mutant, which is deficient in 9-LOX activity, and two mutants noxy6 and noxy22 (non-responding to oxylipins), which are insensitive to 9-HOT, have been used to investigate 9-HOT signalling. Map-based cloning indicated that the noxy6 and noxy22 mutations are located at the CTR1 (CONSTITUTIVE ETHYLENE RESPONSE1) and ETO1 (ETHYLENE-OVERPRODUCER1) loci, respectively. In agreement, the noxy6 and noxy22 mutants, renamed as ctr1-15 and eto1-14, respectively, showed enhanced ethylene (ET) production. The correlation between increased ET production and reduced 9-HOT sensitivity indicated by these results was supported by experiments in which exogenously added ethylene precursor ACC (1-aminocyclopropane-1-carboxylic acid) impaired the responses to 9-HOT. Moreover, a reciprocal interaction between ET and 9-HOT signalling was indicated by results showing that the effect of ACC was reduced in the presence of 9-HOT. We found that the 9-LOX and ET pathways regulate the response to the lipid peroxidation-inducer singlet oxygen. Thus, the massive transcriptional changes seen in wild-type plants in response to singlet oxygen were greatly affected in the lox1 lox5 and eto1-14 mutants. Furthermore, these mutants displayed enhanced susceptibility to both singlet oxygen and Pseudomonas syringae pv. tomato, in the latter case leading to increased accumulation of the lipid peroxidation product malondialdehyde. These findings demonstrate an antagonistic relationship between products of the 9-LOX and ET pathways, and suggest a role for the 9-LOX pathway in modulating oxidative stress, lipid peroxidation and plant defence.
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Affiliation(s)
- Miguel A López
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, CSIC, Campus Universidad Autónoma, Cantoblanco, E-28049 Madrid, Spain
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Hervás M, López MA, Escarpa A. Integrated electrokinetic magnetic bead-based electrochemical immunoassay on microfluidic chips for reliable control of permitted levels of zearalenone in infant foods. Analyst 2011; 136:2131-8. [PMID: 21394379 DOI: 10.1039/c1an15081b] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microfluidic technology has now become a novel sensing platform where different analytical steps, biological recognition materials and suitable transducers can be cleverly integrated yielding a new sensor generation. A novel "lab-on-a-chip" strategy integrating an electrokinetic magnetic bead-based electrochemical immunoassay on a microfluidic chip for reliable control of permitted levels of zearalenone in infant foods is proposed. The strategy implies the creative use of the simple channel layout of the double-T microchip to perform sequentially the immunointeraction and enzymatic reaction by applying a program of electric fields suitably connected to the reservoirs for driving the fluidics at different chambers in order to perform the different reactions. Both zones are used with the aid of a magnetic field to avoid in a very simple and elegant way the non-specific adsorption. Immunological reaction is performed under a competitive enzyme-linked immunosorbent assay (ELISA) where the mycotoxin ZEA and an enzyme-labelled derivative compete for the binding sites of the specific monoclonal antibody immobilised onto protein G modified magnetic beads. Horseradish peroxidase (HRP), in the presence of hydrogen peroxide, catalyses the oxidation of hydroquinone (HQ) to benzoquinone (BQN), whose back electrochemical reduction was detected at +0.1 V. Controlled-electrokinetic fluidic handling optimized conditions are addressed for all analytical steps cited above, and allows performing the complete immunoassay for the target ZEA analyte in less than 15 minutes with unique analytical merits: competitive immunoassay currents showed a very well-defined concentration dependence with a good precision as well as a suitable limit of detection of 0.4 µg L(-1), well below the legislative requirements, and an extremely low systematic error of 2% from the analysis of a maize certified reference material revealing additionally an excellent accuracy. Also, the reliability of the approach is demonstrated by the analysis of selected infant foods yielding the strictest ZEA permitted levels and excellent recoveries of 103 and 101% for solid and liquid samples, respectively.
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Affiliation(s)
- Mirian Hervás
- Department of Analytical Chemistry and Chemical Engineering, Faculty of Chemistry, Alcala University, Alcala de Henares, Madrid, Spain
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Martín R, Navarro T, Romero AM, López MA. Quality management system in the CIEMAT Radiation Dosimetry Service. Radiat Prot Dosimetry 2011; 144:111-114. [PMID: 21131328 DOI: 10.1093/rpd/ncq455] [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: 05/30/2023]
Abstract
This paper describes the activities realised by the CIEMAT Radiation Dosimetry Service (SDR) for the implementation of a quality management system (QMS) in order to achieve compliance with the requirements of ISO/IEC 17025 and to apply for the accreditation for testing measurements of radiation dose. SDR has decided the accreditation of the service as a whole and not for each of its component laboratories. This makes it necessary to design a QMS common to all, thus ensuring alignment and compliance with standard requirements, and simplifying routine works as possible.
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Affiliation(s)
- R Martín
- Radiation Dosimetry Service, Environment Department, CIEMAT, Av Complutense 22, 28040 Madrid, Spain.
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Herrera JA, Quintana JA, López MA, Betancourt M, Fierro R. INDIVIDUAL CRYOPRESERVATION WITH DIMETHYL SULFOXIDE AND POLYVINYLPYRROLIDONE OF EJACULATES AND POOLED SEMEN OF THREE AVIAN SPECIES. ACTA ACUST UNITED AC 2009; 51:353-60. [PMID: 16087563 DOI: 10.1080/014850190944401] [Citation(s) in RCA: 16] [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: 10/25/2022]
Abstract
Artificial insemination (AI) has been used for avian reproduction due to the discovery of cryoprotectants extending its usefulness both in production of domestic fowl and conservation of wild species. The goal of this study was to assess the effect on domestic and wild fowl pooled semen and individual ejaculate cryopreservation with dimethyl sulfoxide (DMSO) and polyvinylpyrrolidone (PVP). Twenty ejaculates and twenty samples of pooled semen of roosters, pheasants and hawks were frozen in media containing DMSO or PVP. DMSO and PVP cryopreservation are equally effective both for ejaculates and pooled semen. Even PVP is a good alternative since no significant difference was found when compared to DMSO. The fertilizing capacity of fresh and cryopreserved pooled semen was analyzed through AI of hens and female pheasants. Similar fertility rates using DMSO, PVP or frozen-thawed samples demonstrated that reproduction is possible through the use of cryopreserved semen. In the case of female pheasants, the same values were obtained with both cryopreserved and fresh semen.
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Affiliation(s)
- J A Herrera
- Universidad Autónoma Metropolitana, México DF, Mexico
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Rodríguez Z, López MA, González M, Tolón B, Nadal L, González L, Vélez H, Fini A. Synthesis, structural characterization and antibacterial activity of novel 7beta-{[3-(substituted phenyl)-2-propenoyl]amino}-3-[(2,5-dihydro-6-hydroxy-2-methyl)-5-oxo-cis-triazin-3-yl]-thiomethyl-cefalosporins. Med Chem 2009; 5:283-92. [PMID: 19442219 DOI: 10.2174/157340609788185855] [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: 11/22/2022]
Abstract
A series of 3-[(2,5-dihydro-6-hydroxy-2-methyl)-5-oxo-cis-triazin-3-yl]-thiomethyl-cefalosporins with various 3-phenyl-2-propenoyl substituted groups at the 7beta-position were synthesized, structurally characterized and evaluated for antibacterial activity in vitro. To prepare these derivatives by the Vilsmeier's reagent method, it was necessary to carefully control the reaction conditions in order to avoid the formation of the biologically inactive alpha epimer. The NMR studies showed that the 3-phenyl-2-propenoyl moiety has little effect on chemical shifts of cephem nucleus protons and carbon atoms. Some of these cephalosporin derivatives showed good in vitro activity against methicillin sensible strains of Staphylococcus aureus (MSSA) and coagulase negative Staphylococcus (MSCoNS). Particularly effective were the compounds carrying a 3-(2'-chlorophenyl)-2-propenoyl or 2-methyl-3-phenyl-2-propenoyl moiety at 7beta-position, both with an antibacterial potency close to cefazoline and higher than cefuroxime. All the synthesized cephalosporins were inactive against methicillin resistant strains of Staphylococcus aureus (MRSA) and coagulase negative Staphylococcus (MRCoNS).
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Affiliation(s)
- Zalua Rodríguez
- Centro de Química Farmacéutica, Playa, CP 16042, La Habana, Cuba
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Angulo-Valadez CE, Cepeda-Palacios R, Ascencio F, Jacquiet P, Dorchies P, Ramírez-Orduña JM, López MA. IgG antibody response against salivary gland antigens from Oestrus ovis L. larvae (Diptera: Oestridae) in experimentally and naturally infected goats. Vet Parasitol 2009; 161:356-9. [PMID: 19251372 DOI: 10.1016/j.vetpar.2009.01.027] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 01/21/2009] [Accepted: 01/26/2009] [Indexed: 10/21/2022]
Abstract
The aims of this study were to analyze the systemic IgG responses against third-instar salivary gland (L3SG) antigens by ELISA in Oestrus ovis experimentally infected kids (EIK) and in naturally exposed adult goats (NEG). Firstly, kids (n=4 per group) were assigned to receive intranasally 0, 12, 24, 36, and 48 first-instars in experimental infections. Blood samples were taken from EIK at Days 0, 14, 42 and 67 post-infection. At necropsy (Day 67), larval number and developmental instars were recorded. In an epidemiological study, blood serum samples were collected from 448 grazing NEG (n=20 flocks) in Baja California Sur, Mexico. Results showed that larval establishment rate was similar in EIK groups. Systemic IgG response reached the threshold after Day 42, but humoral response was not statistically different among EIK groups receiving experimental infections. In NEG, all surveyed flocks (100%) showed specific systemic IgG antibodies to L3SG antigens and the overall goat oestrosis prevalence was 59.2%. In conclusion, larval L3SG antigens were effective in detection of specific systemic IgG antibodies against O. ovis infected kids and goats by ELISA.
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Affiliation(s)
- C E Angulo-Valadez
- Centro de Investigaciones Biológicas del Noroeste, Mar Bermejo 195, Col. Playa de Santa Rita, La Paz, B.C.S. 23090, Mexico
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Bojanich MV, López MA. [Toxocara canis under the microscope]. Rev Argent Microbiol 2009; 41:28. [PMID: 19391522] [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: 05/27/2023] Open
Affiliation(s)
- M V Bojanich
- Area Microbiología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional del Nordeste, Argentina.
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Fornet I, Ortiz-Gómez JR, Palacio FJ, López MA. [Use of nitroglycerin to facilitate obstetric analgesia]. Rev Esp Anestesiol Reanim 2008; 55:520-521. [PMID: 18982795 DOI: 10.1016/s0034-9356(08)70644-3] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Gómez-Ros JM, de Carlan L, Franck D, Gualdrini G, Lis M, López MA, Moraleda M, Zankl M. Analysis of a computational problem involving complex voxel geometries. Radiat Prot Dosimetry 2008; 131:24-27. [PMID: 18718962 DOI: 10.1093/rpd/ncn216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This communication briefly summarises the results obtained from the 'International comparison on MC modeling for in vivo measurement of Americium in a knee phantom' organised within the EU Coordination Action CONRAD (Coordinated Network for Radiation Dosimetry) as a joint initiative of EURADOS working groups 6 (computational dosimetry) and 7 (internal dosimetry). Monte Carlo simulations using the knee voxel phantom proved to be a viable approach to provide the calibration factor needed for in vivo measurements.
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Affiliation(s)
- J M Gómez-Ros
- Centro de Investigaciones Energéticas Medioambientales y Tecnologicas (CIEMAT), Av. Complutense 22, E-28040 Madrid, Spain.
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Palacio FJ, Fornet I, Morillas P, López MA, Reina MA, López A. [Continuous subarachnoid analgesia and anesthesia for labor and cesarean section in a patient who had previously undergone surgery for ependymoma]. Rev Esp Anestesiol Reanim 2008; 55:371-374. [PMID: 18693664 DOI: 10.1016/s0034-9356(08)70594-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report the case of a 38-year-old primipara who had undergone surgery 2 years earlier for an intradural ependymoma at L2-L3 and who was currently asymptomatic. A combined epidural-subarachnoid block was performed for analgesia during labor but this technique was only effective for the first 2 hours. When analgesia via epidural cannula was no longer adequate, it was decided to perform a continuous subarachnoid block. Later, the fetus's head was seen to be too large to fit through the pelvis; for cesarean section, the mother was administered fractionated doses of local anesthetic via the subarachnoid cannula until analgesia reached T4. The patient did not develop postdural puncture headache. Continuous subarachnoid anesthesia may be considered the technique of choice where the patient has a history of spinal surgery.
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Affiliation(s)
- F J Palacio
- Servicio de Anestesiología y Reanimación, Hospital Universitario Maternal La Paz, Madrid
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Palacio FJ, Ortiz-Gómez JR, Fornet I, López MA. [Air embolism during elective cesarean section, and uterine atony due to fetal macrosomia]. Rev Esp Anestesiol Reanim 2008; 55:308-311. [PMID: 18661691 DOI: 10.1016/s0034-9356(08)70575-9] [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: 05/26/2023]
Abstract
We report the case of a paradoxical air embolism during a scheduled cesarean section for fetal macrosomia (7.010 kg) in a 38-year-old woman with a history of gestational diabetes and preeclampsia. Spinal anesthesia was satisfactory and well tolerated. After approximately 30 minutes (coinciding with uterine exteriorization), the patient presented a sudden episode of dyspnea, confusion, hypotension, and ST segment depression. The episode lasted approximately 10 minutes and resolved spontaneously with no sequelae. Neurological status and the electrocardiogram were normal at the end of surgery and no postoperative lesions were observed. In the immediate postoperative period, the patient presented a massive hemorrhage due to uterine atony. Echocardiography revealed a patent foramen ovale. The clinical signs in this patient are highly suggestive of a paradoxical cerebral and coronary air embolism.
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Affiliation(s)
- F J Palacio
- Servicio de Anestesiología y Reanimación, Hospital Maternal La Paz, Madrid
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Palacio FJ, Ortiz-Gómez JR, Fornet I, López MA, Morillas P. [Remifentanil bolus for cesarean section in high-risk patients: study of 12 cases]. Rev Esp Anestesiol Reanim 2008; 55:86-89. [PMID: 18383970 DOI: 10.1016/s0034-9356(08)70515-2] [Citation(s) in RCA: 6] [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: 05/26/2023]
Abstract
OBJECTIVES To evaluate the utility and safety of remifentanil for hemodynamic control during cesarean section in high-risk patients ineligible for spinal anesthesia. METHODS One minute before induction we injected a bolus of 1 microg x kg(-1) of remifentanil, followed by propofol (2.5 mg x kg(-1)), succinylcholine (1 mg x kg(-1)), cisatracurium, sevoflurane in oxygen and nitrous oxide, and fentanyl (5 microg x kg(-1)) after clamping the umbilical cord. We recorded maternal hemodynamic variables, pulse oximetry, capnography, bispectral index, and presence of muscular rigidity. In the neonate we assessed fetal wellbeing, weight, and requirement for naloxone. Hemodynamic stability was defined as no more than 15% variation in arterial pressure with respect to baseline. RESULTS Twelve patients undergoing surgery because of placenta abruptio, subarachnoid hemorrhage, HELLP syndrome, or preeclampsia were enrolled. Hemodynamic variables were consistently stable during surgery in all patients. No cases of neonatal rigidity were noted and there was no need for naloxone. The mean Apgar score was 6.42 (1.5) at 1 minute and 8.42 (0.9) at 5 minutes. CONCLUSION Bolus injection of 1 microg x kg(-1) of remifentanil may be useful for maintaining maternal hemodynamic stability in high-risk obstetric cases. Given the risk of neonatal depression, this resource should be used selectively and the means for neonatal resuscitation should be available.
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Affiliation(s)
- F J Palacio
- Servicio de Anestesiología y Reanimación, Hospital Maternal La Paz. Madrid
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Molina MJ, Mayor AM, Franco AE, Morell CA, López MA, Vilá LM. Utilization of health services and prescription patterns among lupus patients followed by primary care physicians and rheumatologists in Puerto Rico. Ethn Dis 2008; 18:S2-210. [PMID: 18646350 PMCID: PMC2735395] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
OBJECTIVE To examine the utilization of health services and prescription patterns among patients with systemic lupus erythematosus (SLE) followed by primary care physicians and rheumatologists in Puerto Rico. METHODS The insurance claims submitted by physicians to a health insurance company of Puerto Rico in 2003 were examined. The diagnosis of lupus was determined by using the International Classification of Diseases, Ninth Revision, code for SLE (710.0). Of 552,733 insured people, 665 SLE patients were seen by rheumatologists, and 92 were followed by primary care physicians. Demographic features, selected co-morbidities, healthcare utilization parameters, and prescription patterns were examined. Fisher exact test, chi2 test, and analysis of variances were used to evaluate differences between the study groups. RESULTS SLE patients followed by rheumatologists had osteopenia/osteoporosis diagnosed more frequently than did patients followed by primary care physicians. The frequency of high blood pressure, diabetes mellitus, hypercholesterolemia, coronary artery disease, and renal disease was similar for both groups. Rheumatologists were more likely to order erythrocyte sedimentation rate, anti-dsDNA antibodies, and serum complements. No differences were observed for office or emergency room visits, hospitalizations, and utilization of routine laboratory tests. Rheumatologists prescribed hydroxychloroquine more frequently than did primary care physicians. The use of nonsteroidal anti-inflammatory drugs, cyclooxygenase-2 inhibitors, glucocorticoids, azathioprine, cyclophosphamide, and methotrexate was similar for both groups. CONCLUSION Overall, the utilization of health services and prescription patterns among SLE patients followed by primary care physicians and rheumatologists in Puerto Rico are similar. However, rheumatologists ordered SLE biomarkers of disease activity and prescribed hydroxychloroquine more frequently than did primary care physicians.
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Affiliation(s)
- María J. Molina
- Department of Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, Puerto Rico
| | - Angel M. Mayor
- Department of Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, Puerto Rico
| | | | - Carlos A. Morell
- Triple-5, Inc. (Independent license of BC/BSA), San Juan, Puerto Rico
| | - Miguel A. López
- Triple-5, Inc. (Independent license of BC/BSA), San Juan, Puerto Rico
| | - Luis M. Vilá
- Department of Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, Puerto Rico
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Fornet I, Palacio FJ, Morillas P, López MA, Ortiz-Gómez JR. [Experience with uterine artery embolization in the treatment of massive postpartum hemorrhage]. Rev Esp Anestesiol Reanim 2008; 55:21-25. [PMID: 18333382 DOI: 10.1016/s0034-9356(08)70493-6] [Citation(s) in RCA: 5] [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] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To analyze our experience with uterine artery embolization in the management of massive hemorrhage in obstetric patients. PATIENTS AND METHODS This observational, retrospective study analyzed all deliveries requiring a blood transfusion that were performed in the maternity unit of Hospital Universitario La Paz between January 1, 2000 and December 31, 2005. RESULTS A total of 57,835 deliveries were performed with an incidence of postpartum hemorrhage of 0.7% (406 episodes). Uterine artery embolization was performed on 51 patients and 45 patients underwent obstetric hysterectomy. Both procedures were performed on 11 patients. Ten of the patients who underwent obstetric hysterectomy subsequently required uterine artery embolization, whereas only 1 patient required an obstetric hysterectomy following embolization because the hemorrhage was not resolved. The mean consumption of blood products for patients who underwent obstetric hysterectomy was twice that for patients who underwent uterine artery embolization. There were no complications secondary to embolization. CONCLUSIONS Uterine artery embolization is a safe and effective procedure for managing massive postpartum hemorrhage.
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Affiliation(s)
- I Fornet
- Servicio de Anestesiología y Reanimación, Hospital Universitario La Paz, Madrid.
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25
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Fornet I, Palacio FJ, López MA, Morillas P, Ortiz-Gómez JR. [Cesarean section in a woman with acute blood-stage malaria]. Rev Esp Anestesiol Reanim 2007; 54:626-629. [PMID: 18200999] [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: 05/25/2023]
Abstract
Malaria infection during pregnancy is a serious health problem in most of the world's tropical regions. The disease has also been imported into Western countries, however, as an increasing number of infected women, who may become pregnant, emigrate from areas where malaria is endemic. Infection during pregnancy can have serious repercussions for both mother and fetus. Early diagnosis and multidisciplinary management are essential. We report the case of a woman from Guinea who debuted with severe, acute blood-stage malaria in the 32nd week of pregnancy and was admitted to the recovery care unit.
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MESH Headings
- Acute Disease
- Adult
- Antimalarials/therapeutic use
- Cesarean Section
- Consciousness Disorders/etiology
- Equatorial Guinea/ethnology
- Female
- Fetal Distress/etiology
- Humans
- Infant, Newborn
- Infant, Premature
- Infant, Premature, Diseases/etiology
- Liver Failure/etiology
- Malaria, Falciparum/complications
- Malaria, Falciparum/drug therapy
- Obstetric Labor Complications/etiology
- Obstetric Labor, Premature/etiology
- Parasitemia/complications
- Parasitemia/drug therapy
- Pregnancy
- Pregnancy Complications, Infectious/drug therapy
- Pregnancy Complications, Infectious/physiopathology
- Respiration, Artificial
- Respiratory Insufficiency/etiology
- Respiratory Insufficiency/therapy
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Affiliation(s)
- I Fornet
- Servicio de Anestesiología y Reanimación, Hospital Universitario Maternal La Paz, Madrid.
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Fornet I, Morillas P, López MA, Palacio FJ, Aguilar JM, Mesa JL. [Emergency cesarean in a patient with Coffin-Siris syndrome]. Rev Esp Anestesiol Reanim 2007; 54:563-565. [PMID: 18085110] [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: 05/25/2023]
Abstract
Coffin-Siris syndrome is a rare genetic disease characterized by coarse facial features, sparse scalp hair, hirsutism, hypoplasia of the distal phalanges, hypoplastic nail in the fifth digit, and mental retardation and delayed growth evident in both weight and height. Most cases are sporadic, but the possibility of recessive or dominant autosomal inheritance has been suggested. Facial abnormalities that make intubation difficult and mental retardation that interferes with cooperation are aspects of this disease that can affect the choice of type of anesthesia. We report the case of a parturient with Coffin-Siris syndrome who refused epidural analgesia for labor pain and for whom the obstetrician later decided that an emergency cesarean was necessary due to fetal distress.
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Affiliation(s)
- I Fornet
- Servicio de Anestesiología y Reanimación, Hospital Universitario La Paz, Maternidad, Madrid.
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Abstract
OBJECTIVE To examine the prevalence of systemic lupus erythematosus (SLE) and its associated comorbidities in patients from Puerto Rico using a database from a health insurance company. METHODS The insurance claims submitted by physicians in 2003 to a health insurance company of Puerto Rico were examined. Of 552,733 insured people, 877 had a diagnosis of SLE (code 710.0) per the International Classification of Diseases, Ninth Revision (ICD-9). Demographic parameters and selected comorbidities were determined. The diagnosis of comorbities was ascertained using the ICD-9 code, the Current Procedural Terminology-4 code (for disease-specific procedures) and/or the Medi-Span Therapeutic Classification System (for disease-specific pharmacologic treatment). Fisher exact test and chi were used to evaluate differences between SLE patients groups. RESULTS The mean age was 42.0 +/- 13.5, and the female-to-male ratio was 12.5:1. The overall prevalence of SLE was 159 per 100,000 individuals. The prevalence for females was 277 per 100,000 women and for males it was 25 per 100,000 men. The most common comorbidities were high blood pressure (33.7%), osteopenia/osteoporosis (22.2%), hypothyroidism (19.0%), diabetes mellitus (11.6%), and hypercholesterolemia (11.6%). Overall, high blood pressure, diabetes mellitus, hypercholesterolemia, and coronary artery disease were more prevalent in SLE patients older than 54 years. Osteopenia/osteoporosis was more prevalent in women than in men. CONCLUSIONS The prevalence of SLE in Puerto Rico is very high. High blood pressure, diabetes mellitus and hypercholesterolemia, hypothyroidism, and osteopenia/osteoporosis are common comorbidities in these patients. Identification and management of these comorbidities are critical for optimal medical care to this population.
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Affiliation(s)
- María J. Molina
- Department of Internal Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Angel M. Mayor
- Department of Internal Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | | | - Carlos A. Morell
- Triple-S, Inc. (Independent license of BC/BSA), San Juan, Puerto Rico
| | - Miguel A. López
- Triple-S, Inc. (Independent license of BC/BSA), San Juan, Puerto Rico
| | - Luis M. Vilá
- Department of Internal Medicine, Division of Rheumatology, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
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López MA, Rodríguez Z, González M, Tolón B, Avila R, Rodríguez JC, Vélez-Castro H, Fini A. 13C NMR spectroscopy of some third-generation cephalosporins, their synthetic intermediaries and reaction byproducts. Magn Reson Chem 2007; 45:236-9. [PMID: 17252617 DOI: 10.1002/mrc.1952] [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: 05/13/2023]
Abstract
(13)C NMR spectroscopic data for 25 cephalosporin derivatives were assigned by combination of one- and two-dimensional experiments. The effect of the substitution at C-3, C-7 and C-4 acid group positions on the chemical shifts of the cephem nucleus is discussed.
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Affiliation(s)
- Miguel A López
- Centro de Química Farmacéutica, Avenida 200 y 21, Siboney, Playa, CP 16042, Ciudad de La Habana, Cuba
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Moraleda M, Lis M, Gómez-Ros JM, López MA. A specific voxel phantom for in vivo measurements of 241Am in the knee. Radiat Prot Dosimetry 2007; 127:258-61. [PMID: 17553865 DOI: 10.1093/rpd/ncm279] [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: 05/15/2023]
Abstract
Calibration phantoms for in vivo measurements of low-energy photons should be anatomically realistic to minimise the uncertainties in the activity assessment. The calibration of the detection system can be performed using computational techniques based on numerical phantoms. The purpose of this work is to approach a numerical calibration by Monte Carlo (MC) technique of a Germanium detection system for the determination of 241Am in the knee. A specific voxel phantom was built from a computerised tomography of the calibration Spitz knee phantom. The phantom and the procedure to generate the associated input file for the MC code, namely MCNPX, have been described, as well as the characterisation of the detectors according to the manufacturer data and the energy calibration curves of the spectrometer. The detection efficiency and the pulse-height distribution have been determined for a homogeneous contamination of 241Am in bone.
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Affiliation(s)
- M Moraleda
- CIEMAT, Avd. Complutense 22, E-28040 Madrid, Spain.
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Ros JMG, Moraleda M, López MA, Navarro T, Navarro JF. Monte Carlo based voxel phantoms for in vivo internal dosimetry. Radiat Prot Dosimetry 2007; 125:161-5. [PMID: 17449911 DOI: 10.1093/rpd/ncm199] [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: 05/15/2023]
Abstract
The purpose of this communication is to describe briefly the computer programs developed to generate the MCNP input file corresponding to any segmented tomographic data and its application to the calibration procedures for in vivo internal dosimetry. The method has been applied to the determination of 241Am in bone by measurement in skull and knee using MCNP voxel models of a real human head and knee based on the tomographic Voxelman and Arms Down phantoms developed by Zubal et al. at Yale University.
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Gómez-Ros JM, de Carlan L, Franck D, Gualdrini G, Lis M, López MA, Moraleda M, Zankl M. Monte Carlo modelling for in vivo measurements of Americium in a knee voxel phantom: general criteria for an international comparison. Radiat Prot Dosimetry 2007; 127:245-8. [PMID: 17848385 DOI: 10.1093/rpd/ncm403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The general criteria and the scientific approach adopted for an 'International comparison on Monte Carlo modelling for in vivo measurement of Americium in a knee phantom' that is being organised within the EU Coordination Action CONRAD (Coordinated Network for Radiation Dosimetry) are described her. Detection system and a knee voxel phantom based on a computerised axial tomography of the Spitz anthropometric knee phantom with a homogeneous distribution of 241Am in bone have been considered for the simulation of three specific situations: (a) a single Low Energy Germanium detector for a point 241Am source in air; (b) the calculation of photon fluence spectra in air around the voxel phantom; and (c) the calculation of the energy distribution of pulses and peak detection efficiency in the real detection system geometry.
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Affiliation(s)
- J M Gómez-Ros
- CIEMAT, Avenida Complutense 22, E-28040 Madrid, Spain.
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Navarro JF, López MA, Navarro T, Gomez Ros JM, Moraleda M. Assessment of the internal dose of 241Am in bone by in vivo measurements of activity deposited in knee. Radiat Prot Dosimetry 2007; 127:531-4. [PMID: 17872923 DOI: 10.1093/rpd/ncm411] [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: 05/17/2023]
Abstract
In case of chronic exposure or long time after an acute intake of (241)Am as a consequence of an incident, the assessment of internal dose might be realised by estimating the total activity content of this element in the skeleton. For this purpose, a new methodology has been developed at the Whole Body Counting Laboratory of CIEMAT. In vivo measurements of this bone-seeker radionuclide in the knee are performed using four low energy germanium detectors inside a shielded room. The sensitivity study of this technique resulted in a minimum detectable activity of 7 Bq, for a counting time of 1800 s. Extrapolation to the total activity in the bone has been carried out by taking into account that the bone content of the knee calibration phantom is equivalent to 10.7% of the whole skeleton mass. The results of in vivo measurements of population and the procedure for internal dose evaluation are presented here.
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Affiliation(s)
- J F Navarro
- Radiation Dosimetry, CIEMAT, Avda. Complutense 22, E-28040 Madrid, Spain.
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Arroyo-García R, Ruiz-García L, Bolling L, Ocete R, López MA, Arnold C, Ergul A, Söylemezoğlu G, Uzun HI, Cabello F, Ibáñez J, Aradhya MK, Atanassov A, Atanassov I, Balint S, Cenis JL, Costantini L, Goris-Lavets S, Grando MS, Klein BY, McGovern PE, Merdinoglu D, Pejic I, Pelsy F, Primikirios N, Risovannaya V, Roubelakis-Angelakis KA, Snoussi H, Sotiri P, Tamhankar S, This P, Troshin L, Malpica JM, Lefort F, Martinez-Zapater JM. Multiple origins of cultivated grapevine (Vitis vinifera L. ssp. sativa) based on chloroplast DNA polymorphisms. Mol Ecol 2006; 15:3707-14. [PMID: 17032268 DOI: 10.1111/j.1365-294x.2006.03049.x] [Citation(s) in RCA: 167] [Impact Index Per Article: 9.3] [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: 12/14/2022]
Abstract
The domestication of the Eurasian grape (Vitis vinifera ssp. sativa) from its wild ancestor (Vitis vinifera ssp. sylvestris) has long been claimed to have occurred in Transcaucasia where its greatest genetic diversity is found and where very early archaeological evidence, including grape pips and artefacts of a 'wine culture', have been excavated. Whether from Transcaucasia or the nearby Taurus or Zagros Mountains, it is hypothesized that this wine culture spread southwards and eventually westwards around the Mediterranean basin, together with the transplantation of cultivated grape cuttings. However, the existence of morphological differentiation between cultivars from eastern and western ends of the modern distribution of the Eurasian grape suggests the existence of different genetic contribution from local sylvestris populations or multilocal selection and domestication of sylvestris genotypes. To tackle this issue, we analysed chlorotype variation and distribution in 1201 samples of sylvestris and sativa genotypes from the whole area of the species' distribution and studied their genetic relationships. The results suggest the existence of at least two important origins for the cultivated germplasm, one in the Near East and another in the western Mediterranean region, the latter of which gave rise to many of the current Western European cultivars. Indeed, over 70% of the Iberian Peninsula cultivars display chlorotypes that are only compatible with their having derived from western sylvestris populations.
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Affiliation(s)
- R Arroyo-García
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología, CSIC, C/Darwin 3, 28049 Madrid, Spain
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López MA, Zavala-Díaz de la Serna FJ, Jan-Roblero J, Romero JM, Hernández-Rodríguez C. Phylogenetic analysis of a biofilm bacterial population in a water pipeline in the Gulf of Mexico. FEMS Microbiol Ecol 2006; 58:145-54. [PMID: 16958915 DOI: 10.1111/j.1574-6941.2006.00137.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [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: 11/29/2022] Open
Abstract
The aim of this study was to assess the bacterial diversity associated with a corrosive biofilm in a steel pipeline from the Gulf of Mexico used to inject marine water into the oil reservoir. Several aerobic and heterotrophic bacteria were isolated and identified by 16S rRNA gene sequence analysis. Metagenomic DNA was also extracted to perform a denaturing gradient gel electrophoresis analysis of ribosomal genes and to construct a 16S rRNA gene metagenomic library. Denaturing gradient gel electrophoresis profiles and ribosomal libraries exhibited a limited bacterial diversity. Most of the species detected in the ribosomal library or isolated from the pipeline were assigned to Proteobacteria (Halomonas spp., Idiomarina spp., Marinobacter aquaeolei, Thalassospira sp., Silicibacter sp. and Chromohalobacter sp.) and Bacilli (Bacillus spp. and Exiguobacterium spp.). This is the first report that associates some of these bacteria with a corrosive biofilm. It is relevant that no sulfate-reducing bacteria were isolated or detected by a PCR-based method. The diversity and relative abundance of bacteria from water pipeline biofilms may contribute to an understanding of the complexity and mechanisms of metal corrosion during marine water injection in oil secondary recovery.
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Affiliation(s)
- Miguel A López
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, 06400 Mexico, D.F. Mexico
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López MA, Kusznierz GF, Imaz MS, Cociglio R, Tedeschi FA, Zalazar FE. [Human Metapneumovirus (hMPV) associated to severe bronchial asthmatic crisis]. Rev Argent Microbiol 2006; 38:140-2. [PMID: 17152212] [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: 05/12/2023] Open
Abstract
Human Metapneumovirus (hMPV) is a recently reported agent of acute infection in the respiratory tract. It has been found in children as well as in young adults and elders. The clinical manifestations produced by hMPV are indistinguishable from those by common respiratory virus, and can evolve from asymptomatic infection into severe pneumonia. On the other hand, some authors have described cases of bronchial asthma exacerbation associated with hMPV infection. In this work we report a case of a child who presented a severe bronchial asthmatic crisis with a suspected viral associated infection. Immunofluorescence tests yielded negative results for sincitial respiratory virus, adenovirus, a-b influenza virus and parainfluenza 1, 2, 3, virus. In an attempt to detect the presence of hMPV, a RT-PCR was carried out to amplify sequences from both N and F genes. Using this approach, a positive result for hMPV was obtained. To our knowledge, this is the first description of a case of asthma exacerbation associated to hMPV in our region. In addition, these results are similar to previous reports where it was hypothesized that, like RSV, hMPV can trigger a respiratory chronic disease as asthma.
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Affiliation(s)
- M A López
- Instituto Nacional de Enfermedades Respiratorias Emilio Coni, Bias Parera 8260 (3000) Santa Fe, Argentina.
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López MA, Rodríguez Z, González M, Tolón B, Avila R, Mamposo T, Vélez H, Fini A. 1H and 13 C spectral assignments of 7beta-(cinnamoyl-substituted)amino-3-acetoxymethyl-cephalosporins. Magn Reson Chem 2005; 43:261-263. [PMID: 15593237 DOI: 10.1002/mrc.1525] [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: 05/24/2023]
Abstract
The (1)H and (13)C spectroscopic data for 7beta-(cinnamoyl-substituted)amino-3-acetoxymethyl-cephalosporins were fully assigned by a combination of one- and two-dimensional experiments. Substitution on the aromatic ring and on the double-bond alpha-position of the cinnamoyl moiety has little influence on the spectroscopic properties of the 7beta-aminocephalosporanic acid parent moiety.
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Affiliation(s)
- Miguel A López
- Centro de Química Farmacéutica, Avenida 200 y 21, Siboney, Playa, CP 16042, Ciudad de La Habana, Cuba
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López MA, Rodríguez Z, González M, Tolón B, Avila R, González I, Garmendía L, Mamposo T, Carrasco R, Pellón R, Vélez H, Fini A. Novel cephalosporin derivatives possessing a substituted cinnamoyl moiety at the 7 beta-position. Synthesis, structural characterization and antibacterial activity of 3-acetoxymethyl cephalosporin derivatives. Eur J Med Chem 2005; 39:657-64. [PMID: 15276299 DOI: 10.1016/j.ejmech.2004.02.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Accepted: 02/24/2004] [Indexed: 11/30/2022]
Abstract
Twenty 3-acetoxymethyl cephalosporin derivatives, with various cinnamoyl (3-phenyl-2-propenoyl) substituted groups at the 7beta-position, were synthesized and evaluated for antibacterial activity in vitro. Some of these cephalosporin derivatives showed good selective activity against Gram-positive bacteria. Although substitution on the aromatic ring of cinnamoyl moiety generally reduced antimicrobial activity against Staphylococcus sp. and Enterococcus sp., a hydroxy group at the para position, and particularly ortho, para di-chloro substitution, improved the activity against methicillin resistant strains of Staphylococcus aureus (MRSA). Substitution on the double bond alpha position of the cinnamoyl moiety also affected the antimicrobial activity. A cyano group attached to this position increased activity against both negative coagulase Staphylococcus and Enterococcus sp. and extended the antibacterial spectrum towards Gram-negative bacteria.
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Affiliation(s)
- Miguel A López
- Centro de Química Farmacéutica, Avenida 200 y 21, Siboney, Playa, CP 16042, La Habana, Cuba
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Zapatero A, Marín A, Cruz-Conde A, López MA, Mínguez R, García-Vicente F. Intensificación de dosis con radioterapia conformacional 3D en cáncer de próstata. ¿Más dosis es mejor? Actas Urol Esp 2005; 29:834-41. [PMID: 16353769 DOI: 10.1016/s0210-4806(05)73354-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE The present study was undertaken to determine the effect of radiation dose on biochemical control and morbidity in prostate cancer patients. MATERIALS AND METHODS Between 1995 and 2003, 360 patients with T1-T3b prostate cancer were treated in a sequential radiation dose escalation trial from 66.0 to 82.6 Gy. These patients were prospectively assigned to 1 of 3 prognostic groups according to risk factors: a) low risk patients were treated with 3DCRT alone; b) intermediate risk patients were allocated to receive neoadjuvant AD (NAD) 4-6 months prior and during 3DCRT; and c) high-risk received NAD and adjuvant AD (AAD) 2 years after 3DCRT. RTOG/EORTC toxicity score was used to analyze late complications RESULTS Median follow-up was 48 months (12-138). The actuarial biochemical disease free survival (bDFS) at 4 years for low risk, intermediate risk and high risk patients was 88%, 68% and 79% respectively. Stratified and multivariate analysis showed that higher radiation dose (>76 Gy) (p=0.0053) and the use of AAD for high risk patients (p=0.0046) correlated significantly with an improvement of bDFS for all patients. The incidence of late grade 2 rectal and urinary bleeding were 7% and 11% respectively. CONCLUSION The present study confirms an independent benefit of high-dose (> 76 Gy) radiation therapy and long-term AAD in high-risk prostate cancerpatients.
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Affiliation(s)
- A Zapatero
- Servicios de Oncologia Radioterápica, Hospital Universitario de la Princesa, Madrid.
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Cortés DA, Medina A, Escobedo JC, Escobedo S, López MA. Effect of wollastonite ceramics and bioactive glass on the formation of a bonelike apatite layer on a cobalt base alloy. J Biomed Mater Res A 2004; 70:341-6. [PMID: 15227680 DOI: 10.1002/jbm.a.30092] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A biomimetic method was used to promote a bioactive surface on a cobalt base alloy (ASTM F-75). The metallic substrates were alkali treated and some of the samples were subsequently heat treated. The treated samples were immersed in simulated body fluid (SBF) on granular particles of either bioactive glass or wollastonite. For comparative purposes, no bioactive system was used in some tests. Three different methods were used for the immersion of the samples in SBF: 1) 21 days in SBF, 2) 21 days in 1.5 SBF, and 3) 7 days in SBF followed by 14 days in 1.5 SBF (re-immersion method). A bonelike apatite layer was formed on all the samples placed on wollastonite and bioactive glass particles. The morphology of the apatite layer formed by using the re-immersion method and wollastonite closely resembled the existing bioactive systems. No apatite layer was observed on the samples treated without bioactive material and soaked for 21 days in SBF or 1.5 SBF, apart from the substrates treated by using the re-immersion method. The heat treatment delayed the apatite formation in all the cases studied.
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Affiliation(s)
- D A Cortés
- CINVESTAV Unidad Saltillo, Carr. Saltillo-Monterrey Km 13.5 A.P. 663, 25000 Saltillo, Coah., Mexico.
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Wilcken B, Bamforth F, Li Z, Zhu H, Ritvanen A, Renlund M, Stoll C, Alembik Y, Dott B, Czeizel AE, Gelman-Kohan Z, Scarano G, Bianca S, Ettore G, Tenconi R, Bellato S, Scala I, Mutchinick OM, López MA, de Walle H, Hofstra R, Joutchenko L, Kavteladze L, Bermejo E, Martínez-Frías ML, Gallagher M, Erickson JD, Vollset SE, Mastroiacovo P, Andria G, Botto LD. Geographical and ethnic variation of the 677C>T allele of 5,10 methylenetetrahydrofolate reductase (MTHFR): findings from over 7000 newborns from 16 areas world wide. J Med Genet 2003; 40:619-25. [PMID: 12920077 PMCID: PMC1735571 DOI: 10.1136/jmg.40.8.619] [Citation(s) in RCA: 326] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
Cefdinir, a broad spectrum third-generation cephalosporin for oral administration, was prepared by the following synthetic pathway: synthesis of diphenylmethyl 7beta-amino-3-vinyl-3-cephem-4-carboxylate hydrochloride from 7-aminocephalosporanic acid (7-ACA), preparation of sodium 2-(2-tritylaminothiazol-4-yl)-(Z)-2-(tritylhydroxyimino) acetate from ethyl acetoacetate, coupling of both intermediaries to obtain diphenylmethyl 7beta-[2-(2-tritylaminothiazol-4-yl)-(Z)-2-tritylhydroxyimino-3-vinyl-3-cephem-4-carboxylate and final cleavage of trityl and diphenylmethyl protective groups. This procedure allows to obtain better yields of cefdinir and to avoid the use of diketene during the synthesis of this antibiotic by the previously reported method.
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Affiliation(s)
- Maritza González
- Department of Chemical Synthesis, Center of Pharmaceutical Chemistry, Ave. 200 y 21, Atabey, Playa, Ciudad de la Habana, Cuba
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Rodríguez JC, Hernández R, González M, Rodríguez Z, Tolón B, Velez H, Valdés B, López MA, Fini A. An improved method for preparation of cefpodoxime proxetil. Farmaco 2003; 58:363-9. [PMID: 12729830 DOI: 10.1016/s0014-827x(03)00051-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cefpodoxime proxetil, a third-generation cephalosporin for oral administration, was synthesized by a method based on the following sequence of reactions: acylation of 7-aminocephalosporanic acid (7-ACA) with S-benzothiazol-2-yl(2-amino-4-thiazolyl)(methoxyimino)thioacetate (MAEM), chloroacetylation of the cefotaxime formed with chloroacetyl chloride, esterification of the acid function with 1-iodoethyl isopropyl carbonate and final cleavage of chloroacetamide protective group by treatment with thiourea in N,N-dimethylacetamide. The developed procedure allows us to obtain better yields of cefpodoxime proxetil and to eliminate the final purification step by column chromatography, necessary during the synthesis of this antibiotic by the previously reported methods.
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Affiliation(s)
- Juan C Rodríguez
- Department of Chemical Synthesis, Center of Pharmaceutical Chemistry, Ave. 200 y 21, Atabey, Playa, Havana City, Cuba
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Acosta JJ, San Román JI, López MA, Calvo JJ. Influence of chronic ethanol consumption on the muscarinic cholinergic control of rat pancreatic acinar cells. J Physiol Biochem 2000; 56:145-54. [PMID: 11198150 DOI: 10.1007/bf03179781] [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: 01/01/2023]
Abstract
There are a number of hypothetical explanations for the actions of ethanol on the exocrine pancreas; among them, the cholinergic hypothesis has received special attention. According to this hypothesis, chronic alcohol consumption induces alterations in the control of exocrine pancreatic function resulting in cholinergic hyperstimulation of pancreatic acinar cells and their muscarinic receptors. Our aim was to investigate the cholinergic control of pancreatic enzyme secretion and the number and affinity of muscarinic receptors in the pancreatic acinar cells of rats subjected to chronic ethanol ingestion. We also investigated whether a high-fibre diet modifies the actions of ethanol on these aspects of the exocrine pancreatic function. Four groups of rats received either a standard or a high fibre diet, and either water or 20% (v/v) ethanol. After 6 months of treatment, isolated pancreatic acini were used for the determination of carbachol-stimulated amylase secretion and for the analysis of muscarinic receptors, using 1-[N-methyl-3H]scopolamine as a radioligand. Neither chronic ethanol intake nor a high fibre diet caused any apparent alteration in pancreatic histology, neither did them modify plasmatic amylase levels. Chronic alcoholization resulted in a significant increase in the amylase released from pancreatic acini in response to carbachol stimulation, but it did not affect either the number or the affinity of pancreatic acinar muscarinic receptors. The actions of ethanol are not significantly modified by the simultaneous consumption of a high fibre diet.
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Affiliation(s)
- J J Acosta
- Depto de Fisilogía y Farmacología, Univ de Salamanca, Spain
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García-Benito M, San Román JI, López MA, García-Marín LJ, Calvo JJ. Nitric oxide stimulates tyrosine phosphorylation of p125(FAK) and paxillin in rat pancreatic acini. Biochem Biophys Res Commun 2000; 274:635-40. [PMID: 10924330 DOI: 10.1006/bbrc.2000.3192] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some of the effects of several oncogenes, integrins, growth factors, and neuropeptides are mediated by tyrosine phosphorylation of the non-receptor tyrosine kinase p125(FAK) and the cytoskeletal protein paxillin. We have demonstrated that different stimuli cause tyrosine phosphorylation of p125(FAK) and paxillin in rat pancreatic acini. The aim of the present study was to determine whether exogenous NO activates this pathway. We demonstrate that in isolated rat pancreatic acini, a NO donor, sodium nitroprusside (SNP) stimulates, in a dose- and time-dependent way, tyrosine phosphorylation of p125(FAK) and paxillin. The same effects could be observed after incubating acini with 8-Br-cGMP. Moreover, the stimulation caused by SNP was completely abolished by two different guanylyl cyclase inhibitors, methylene blue, and LY-83583. These inhibitors also diminished unstimulated phosphorylation of p125(FAK) and paxillin. We conclude that in rat pancreatic acini exogenous NO causes p125(FAK) and paxillin tyrosine phosphorylation that is mediated by a guanylyl cyclase-dependent pathway.
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Affiliation(s)
- M García-Benito
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, Salamanca, Spain
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Muñoz L, Callejas JL, Troncoso E, López MA. [Thrombophlebitis of the innominate vein in a patient with a pacemaker]. Enferm Infecc Microbiol Clin 2000; 18:362-3. [PMID: 11109730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Abstract
An amperometric immunosensor for the detection of the herbicide atrazine has been developed. A redox polymer PVPOs(bpy)2Cl was co-immobilized with the specific antibody on the surface of the electrode by crosslinking with PEGDGE to form an electron-conducting hydrogel. In a competitive assay the occurrence of the antibody-antigen reaction on the surface of the sensing film was detected through the 'electrical wiring' of the redox centres of antigen-labelled horseradish peroxidase and the electrode surface in the presence of H2O2 at 0.1 V (vsAg/AgCl).
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Affiliation(s)
- M A López
- Departamento de Química Analítica, Facultad de Farmacia, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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Plaja I, Arxer A, Metje M, Santiveri X, Villalonga A, Fernández MA, López MA. [Comparative study between 5% prilocaine and 2% mepivacaine by the subarachnoid route in transurethral resections]. Rev Esp Anestesiol Reanim 2000; 47:194-7. [PMID: 10902449] [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: 02/17/2023]
Abstract
OBJECTIVE To compare the duration of spinal block with 5% prilocaine and 2% mepivacaine in short procedures for transurethral resection and to assess possible complications in the immediate postoperative period. MATERIAL AND METHODS Fifty-seven patients scheduled for transurethral resection of the prostate or a vesical tumor. Patients were ASA I-III, over 55 years of age and randomly assigned to two groups to receive 5% prilocaine (1 mg/kg, n = 27) or 2% mepivacaine (0.8 mg/kg, n = 30). We collected data on anesthetic technique, levels of extension of motor and sensory blockades, duration of blockades and complications within the first 24 hours after surgery. RESULTS Demographic data, ASA classification and duration of surgery were similar in both groups. We found statistically significant differences (p < 0.05) in duration of sensory blockade (120.92 +/- 36.21 min with prilocaine and 145.83 +/- 35.81 min with mepivacaine) and in motor blockade (106.29 +/- 38.16 min with prilocaine and 133.16 +/- 42.21 min with mepivacaine). Five cases of hypotension and 4 of bradycardia occurred in each group and one patient in the mepivacaine group suffered slight postoperative cephalea. CONCLUSIONS Both local anesthetics offer good surgical conditions with hemodynamic stability and few complications. The duration of sensory and motor blockade is shorter with prilocaine than with mepivacaine, making prilocaine more appropriate for short interventions.
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Affiliation(s)
- I Plaja
- Servicio de Anestesiología, Reanimación y Terapéutica del Dolor, Hospital Universitari de Girona Dr. Josep Trueta.
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Abstract
A rapid procedure is reported for the synthesis of cefotaxime, by acylation of the 7-amino cephalosporanic acid with the 2-mercaptobenzothiazolyl thioester of (Z)-2-[2-aminothiazol-4-yl]-2-methoxyimino acetic acid (MAEM) that is a commercial reagent. The reaction was carried out at room temperature for 1 h, obtaining 95% yield. 2-Mercaptobenzothiazole was recovered as a side-product with a high purity and yield. The proposed method differentiates from those reported previously for a shorter time and very mild reaction condition, as well as for a ready for use reagent.
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Affiliation(s)
- J C Rodríguez
- Departamento de Síntesis Química, Centro de Química Farmacéutica, Ciudad de La Habana, Cuba
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Mutchinick OM, López MA, Luna L, Waxman J, Babinsky VE. High prevalence of the thermolabile methylenetetrahydrofolate reductase variant in Mexico: a country with a very high prevalence of neural tube defects. Mol Genet Metab 1999; 68:461-7. [PMID: 10607475 DOI: 10.1006/mgme.1999.2939] [Citation(s) in RCA: 64] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Neural tube defects (NTD) are highly prevalent in the Mexican population. According to data from the Registry and Epidemiological Surveillance of External Congenital Malformations (RYVEMCE), at least 1 in 250 conceptions that reach 20 weeks of pregnancy or more has a NTD. This number is three to four times higher than that observed in other related ethnic groups. A common novel mutation (C677T) in the methylenetetrahydrofolate reductase (MTHFR) gene is considered an associated risk factor for NTD and other malformations. Studies in different populations agree that the prevalence of the homozygote for the mutated allele is higher in cases of NTD than in controls. In a meta-analysis recently published, the mean prevalence of the homozygote for the mutation was 9.2% for different groups of European controls and 16.4% in NTD cases from the same populations. This prompted us to investigate the frequency of the normal (C) and the mutant (T) alleles and the prevalence of the expected (CC, CT and TT) genotypes in 250 healthy Mexican women from different parts of the country. The proportion of CC (17.6%), CT (47.6%), and TT (34. 8%) genotypes found, and the gene frequencies of 0.414 and 0.586% for the C and T alleles, respectively, confirmed the very high prevalence of the mutant allele and the TT genotype in the sample studied. Comparisons with studies done in Holland, Ireland, the United States, Japan, and other ethnic groups showed highly significant differences, with an average OR of 5.8 (95% Cl 3.4-10.3) for a Mexican being homozygous for the mutation. These findings may explain an important part of the high prevalence of NTD observed in our population.
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Affiliation(s)
- O M Mutchinick
- Departamento de Genética, Instituto Nacional de la Nutrición Salvador Zubirán, México, D.F., Mexico.
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Affiliation(s)
- J D Díaz
- Emergency Department, Poniente Hospital, Almería, Spain
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