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Rodriguez F, Nin N, Fajardo A, Aunchayna M, Guerendiaín R, Hurtado J. [Early lung autopsy in deceased patients with acute respiratory distress syndrome due to infection by SARS-CoV-2]. Med Intensiva 2023; 47:173-175. [PMID: 35935246 PMCID: PMC9339975 DOI: 10.1016/j.medin.2022.07.001] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 07/12/2022] [Indexed: 11/23/2022]
Affiliation(s)
- F. Rodriguez
- Unidad de Medicina Intensiva, Hospital Español «Juan J. Crottogini» ASSE, Montevideo, Uruguay,Autor para correspondencia
| | - N. Nin
- Unidad de Medicina Intensiva, Hospital Español «Juan J. Crottogini» ASSE, Montevideo, Uruguay
| | - A. Fajardo
- Laboratorio de Virología Molecular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - M. Aunchayna
- Laboratorio de Anatomía Patológica, Hospital Maciel ASSE, Montevideo, Uruguay
| | - R. Guerendiaín
- Unidad de Medicina Intensiva, Hospital Español «Juan J. Crottogini» ASSE, Montevideo, Uruguay
| | - J. Hurtado
- Unidad de Medicina Intensiva, Hospital Español «Juan J. Crottogini» ASSE, Montevideo, Uruguay
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Rodriguez F, Nin N, Fajardo A, Auchayna M, Guerendiaín R, Hurtado J. Early lung autopsy in deceased patients with acute respiratory distress syndrome due to infection by SARS-CoV-2. Med Intensiva 2023; 47:173-175. [PMID: 36272904 PMCID: PMC9579894 DOI: 10.1016/j.medine.2022.10.001] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- F Rodriguez
- Unidad de Medicina Intensiva, Hospital Español "Juan J Crottogini" ASSE, Montevideo, Uruguay.
| | - N Nin
- Unidad de Medicina Intensiva, Hospital Español "Juan J Crottogini" ASSE, Montevideo, Uruguay
| | - A Fajardo
- Laboratorio de Virología Molecular, Facultad de Ciencias. Universidad de la República, Montevideo, Uruguay
| | - M Auchayna
- Laboratorio de Anatomía Patológica, Hospital Maciel ASSE, Montevideo, Uruguay
| | - R Guerendiaín
- Unidad de Medicina Intensiva, Hospital Español "Juan J Crottogini" ASSE, Montevideo, Uruguay
| | - J Hurtado
- Unidad de Medicina Intensiva, Hospital Español "Juan J Crottogini" ASSE, Montevideo, Uruguay
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Hurtado J, Almeida FC, Belliard SA, Revale S, Hasson E. On how to identify a seminal fluid protein: A response to Wigby et al. Insect Mol Biol 2022; 31:537-542. [PMID: 35927970 DOI: 10.1111/imb.12806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
The choice of criteria to delimit a group or class is a subjective matter, even though the reasoning, the objectives and the criteria themselves should always be clearly stated. This paper is part of a discussion about the criteria used to identify seminal fluid proteins (SFPs) in Drosophila species. SFPs are proteins that are transferred to females during copulation together with sperm. The only way to ascertain that a protein is an SFP is to prove that it is produced in a male reproductive organ and is found in the female reproductive tract after insemination. Nevertheless, the required methodology is labour-intensive and expensive, and therefore this kind of data is unlikely to be available for many species, precluding comparative and evolutionary studies on the subject. To conduct evolutionary analyses, in a previous study, we capitalized on the accumulated knowledge we have in the model species D. melanogaster to recommend a set of criteria for identifying candidate SFPs in other Drosophila species. Those criteria, based on transcriptomic evidence and in silico predictions from sequences, would allow a good balance between sensitivity (the inclusion of true SFPs) and specificity (the exclusion of false positives). In view of the criticism raised by another group, here we defend our criteria on one hand while accepting there is room for improvement on the other. The results are updated sets of criteria and SFPs that we believe can be useful in future evolutionary studies.
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Affiliation(s)
- Juan Hurtado
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Buenos Aires, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Buenos Aires, Argentina
| | - Francisca Cunha Almeida
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Buenos Aires, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Buenos Aires, Argentina
| | - Silvina Anahí Belliard
- Laboratorio de Insectos de Importancia Agronómica, IGEAF (INTA), GV-IABIMO (CONICET), Buenos Aires, Argentina
| | - Santiago Revale
- Technology Department, Alchemab Therapeutics Ltd., London, UK
| | - Esteban Hasson
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Buenos Aires, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Buenos Aires, Argentina
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Belliard SA, Bachmann GE, Fernández PC, Hurtado J, Vera MT, Segura DF. Identification of host plant volatile stimulants of Anastrepha fraterculus male courtship behavior. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.943260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In some tephritid fruit flies, exposure to volatile compounds from host plants increases male sexual success. This phenomenon has been used to boost sterile males’ sexual competitiveness in the framework of the sterile insect technique (SIT). Previous studies revealed that males of Anastrepha fraterculus (Diptera: Tephritidae) exposed to volatiles from guava (Psidium guajava) fruit (GF) and guava essential oil (GEO) exhibit intensified courtship behavior and have greater copulatory success relative to unexposed males. Similar results were achieved in these flies through exposure to moradillo (Schinus polygama) essential oil or lemon (Citrus limon) essential oil. To identify the responsible compounds involved in these effects, we compared the volatile chemical profiles of GF, GEO, moradillo essential oil, and lemon essential oil. We selected five candidate compounds: (E)-β-ocimene, (Z)-β-ocimene, limonene, β-caryophyllene, and α-humulene. Using the electroantennographic detection (EAD) technique, we verified that males are able to detect all the candidate compounds and built dose-response curves between 0.01 and 100 μg/μl for each compound. We confirmed a stimulating effect on the courtship behavior of males for (E/Z)-β-ocimene and (R)-limonene, whereas β-caryophyllene and α-Humulene did not affect male courtship behavior. For those compounds that sexually stimulated males, we found a dose-dependent effect. Males’ behavioral response to the semiochemicals was maximum when (R)-limonene was combined with (E/Z)-β-ocimene, but the response was reduced when β-caryophyllene and α-humulene were included, which suggests some sort of negative interaction between them. Our results may contribute to the ongoing development of the SIT in this species.
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Rondón JJ, Moreyra NN, Pisarenco VA, Rozas J, Hurtado J, Hasson E. Evolution of the odorant-binding protein gene family in Drosophila. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.957247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Odorant-binding proteins (OBPs) are encoded by a gene family involved in the perception of olfactory signals in insects. This chemosensory gene family has been advocated as a candidate to mediate host preference and host shifts in insects, although it also participates in other physiological processes. Remarkable differences in the OBP gene repertoire have been described across insect groups, suggesting an accelerated gene turnover rate. The genus Drosophila, is a valuable resource for ecological genomics studies since it comprises groups of ecologically diverse species and there are genome data for many of them. Here, we investigate the molecular evolution of this chemosensory gene family across 19 Drosophila genomes, including the melanogaster and repleta species groups, which are mostly associated with rotting fruit and cacti, respectively. We also compared the OBP repertoire among the closely related species of the repleta group, associated with different subfamilies of Cactaceae that represent disparate chemical challenges for the flies. We found that the gene family size varies widely between species, ranging from 39 to 54 candidate OBPs. Indeed, more than 54% of these genes are organized in clusters and located on chromosomes X, 2, and 5, with a distribution conserved throughout the genus. The family sizes in the repleta group and D. virilis (virilis-repleta radiation) were smaller than in the melanogaster group. We tested alternative evolutionary models for OBP family size and turnover rates based on different ecological scenarios. We found heterogeneous gene turnover rates (GR) in comparisons involving columnar cactus specialists, prickly pear specialists, and fruit dwellers lineages, and signals of rapid molecular evolution compatible with positive selection in specific OBP genes. Taking ours and previous results together, we propose that this chemosensory gene family is involved in host adaptation and hypothesize that the adoption of the cactophilic lifestyle in the repleta group accelerated the evolution of members of the family.
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Paez J, Hurtado J, Reyes T, Abusleme R, Arroyo P, Oñate C. Relationship between Parents' Physical Activity Level and the Motor Development Level and BMI of Their Children. Int J Environ Res Public Health 2022; 19:ijerph19159145. [PMID: 35897516 PMCID: PMC9332858 DOI: 10.3390/ijerph19159145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/13/2022] [Accepted: 07/21/2022] [Indexed: 01/27/2023]
Abstract
All the variables that arise in family dynamics can have significant effects on the lives of children concerning their nutritional status and motor development. The objective of this study was to relate the PAL of parents to the level of motor development and the BMI of their children. A total of 198 subjects participated, with the age of the students ranging between 8 and 10 years. To measure the BMI, the norms for the nutritional evaluation of children and teenagers from 5 to 19 years were used; to identify the motor behaviors, the TGMD-2 Test was used; and to identify the level of physical activity of parents, the International Physical Activity Questionnaire (IPAQ) was used. For the analysis, the independent samples t-test and the non-parametric Mann–Whitney U test (Wilcoxon) were used, and for the correlational analysis, Spearman’s rho test was applied. This study found no significant correlation between the activity level of parents and nutritional status variables (p = 0.162), or between the PAL variables of parents and the motor development of their children (p = 0.738). A parent’s level of physical activity does not have a direct relationship with the nutritional status or the motor development of their children.
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Affiliation(s)
- Jacqueline Paez
- Escuela Educación Física, Pontificia Universidad Católica de Valparaíso, Viña del Mar 252000, Chile; (J.H.); (R.A.)
- Correspondence:
| | - Juan Hurtado
- Escuela Educación Física, Pontificia Universidad Católica de Valparaíso, Viña del Mar 252000, Chile; (J.H.); (R.A.)
| | - Tomas Reyes
- Escuela Educación Física, Universidad Playa Ancha, Valparaíso 2340000, Chile;
| | - Rosita Abusleme
- Escuela Educación Física, Pontificia Universidad Católica de Valparaíso, Viña del Mar 252000, Chile; (J.H.); (R.A.)
| | - Patricio Arroyo
- Escuela Educación Física, Universidad San Sebastián, Santiago 8320000, Chile;
| | - Cristian Oñate
- Escuela de Kinesiologia, Universidad Católica de Temuco, Temuco 4780000, Chile;
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Molina RS, Rix G, Mengiste AA, Alvarez B, Seo D, Chen H, Hurtado J, Zhang Q, Donato García-García J, Heins ZJ, Almhjell PJ, Arnold FH, Khalil AS, Hanson AD, Dueber JE, Schaffer DV, Chen F, Kim S, Ángel Fernández L, Shoulders MD, Liu CC. In vivo hypermutation and continuous evolution. Nat Rev Methods Primers 2022; 2:37. [PMID: 37073402 PMCID: PMC10108624 DOI: 10.1038/s43586-022-00130-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rosana S. Molina
- Department of Biomedical Engineering, University of California, Irvine, CA 92617, USA
| | - Gordon Rix
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA
| | - Amanuella A. Mengiste
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Beatriz Alvarez
- Department of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, Campus UAM Cantoblanco, 28049 Madrid, Spain
| | - Daeje Seo
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Haiqi Chen
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Juan Hurtado
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA
| | - Qiong Zhang
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA
| | - Jorge Donato García-García
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramon Corona 2514, Nuevo Mexico, C.P. 45138, Zapopan, Jalisco, Mexico
| | - Zachary J. Heins
- Biological Design Center, Boston University, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
| | - Patrick J. Almhjell
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Frances H. Arnold
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Ahmad S. Khalil
- Biological Design Center, Boston University, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts, USA
| | - Andrew D. Hanson
- Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA
| | - John E. Dueber
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA
- Innovative Genomics Institute, University of California Berkeley and San Francisco, Berkeley, CA, USA
- Biological Systems & Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - David V. Schaffer
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA
- Innovative Genomics Institute, University of California Berkeley and San Francisco, Berkeley, CA, USA
- Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, CA, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA
- Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, USA
| | - Fei Chen
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Seokhee Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Luis Ángel Fernández
- Department of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, Campus UAM Cantoblanco, 28049 Madrid, Spain
| | - Matthew D. Shoulders
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Chang C. Liu
- Department of Biomedical Engineering, University of California, Irvine, CA 92617, USA
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA
- Department of Chemistry, University of California, Irvine, CA 92617, USA
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Hurtado J, Almeida FC, Belliard SA, Revale S, Hasson E. Research gaps and new insights in the evolution of Drosophila seminal fluid proteins. Insect Mol Biol 2022; 31:139-158. [PMID: 34747062 DOI: 10.1111/imb.12746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 09/20/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
While the striking effects of seminal fluid proteins (SFPs) on females are fairly conserved among Diptera, most SFPs lack detectable homologues among the SFP repertoires of phylogenetically distant species. How such a rapidly changing proteome conserves functions across taxa is a fascinating question. However, this and other pivotal aspects of SFPs' evolution remain elusive because discoveries on these proteins have been mainly restricted to the model Drosophila melanogaster. Here, we provide an overview of the current knowledge on the inter-specific divergence of the SFP repertoire in Drosophila and compile the increasing amount of relevant genomic information from multiple species. Capitalizing on the accumulated knowledge in D. melanogaster, we present novel sets of high-confidence SFP candidates and transcription factors presumptively involved in regulating the expression of SFPs. We also address open questions by performing comparative genomic analyses that failed to support the existence of many conserved SFPs shared by most dipterans and indicated that gene co-option is the most frequent mechanism accounting for the origin of Drosophila SFP-coding genes. We hope our update establishes a starting point to integrate further data and thus widen the understanding of the intricate evolution of these proteins.
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Affiliation(s)
- Juan Hurtado
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
| | - Francisca Cunha Almeida
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
| | - Silvina Anahí Belliard
- Laboratorio de Insectos de Importancia Agronómica, IGEAF (INTA), GV-IABIMO (CONICET), Buenos Aires, Argentina
| | - Santiago Revale
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Esteban Hasson
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Argentina
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
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Juliao-Baños F, Kock J, Arrubla M, Calixto O, Camargo J, Cruz L, Hurtado J, Clavijo A, Donado J, Schwartz S, Abreu MT, Damas OM. Trends in the epidemiology of inflammatory bowel disease in Colombia by demographics and region using a nationally representative claims database and characterization of inflammatory bowel disease phenotype in a case series of Colombian patients. Medicine (Baltimore) 2021; 100:e24729. [PMID: 33607817 PMCID: PMC7899864 DOI: 10.1097/md.0000000000024729] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 01/18/2021] [Indexed: 01/05/2023] Open
Abstract
The incidence of inflammatory bowel disease (IBD) is on the rise in Latin America. The aims of this study were to examine epidemiologic trends of IBD in Colombia by demographics, region, urbanicity, and to describe the IBD phenotype in a large well-characterized Colombian cohort.We used a national database of 33 million adults encompassing 97.6% of the Colombian population in order to obtain epidemiologic trends of IBD using International Classification of Diseases 10codes for adults with ulcerative colitis (UC) and Crohn disease (CD). We calculated the incidence and prevalence of UC and CD from 2010-2017 and examined epidemiologic trends by urbanicity, demographics, and region. We then examined the IBD phenotype (using Montreal Classification), prevalence of IBD-related surgeries, and types of IBD-medications prescribed to adult patients attending a regional IBD clinic in Medellin, Colombia between 2001 and 2017.The incidence of UC increased from 5.59/100,000 in 2010 to 6.3/100,000 in 2017 (relative risk [RR] 1.12, confidence interval (CI) (1.09-1.18), P < .0001). While CD incidence did not increase, the prevalence increased within this period. The Andes region had the highest incidence of IBD (5.56/100,000 in 2017). IBD was seen less in rural regions in Colombia (RR=.95, CI (0.92-0.97), p < .01). An increased risk of IBD was present in women, even after adjusting for age and diagnosis year (RR 1.06 (1.02-1.08), P = .0003). The highest IBD risk occurred in patients 40 to 59 years of age. In the clinic cohort, there were 649 IBD patients: 73.7% UC and 24.5% CD. Mean age of diagnosis in CD was 41.0 years and 39.9 years in UC. UC patients developed mostly pancolitis (43%). CD patients developed mostly ileocolonic disease and greater than a third of patients had an inflammatory, non-fistulizing phenotype (37.7%). A total of 16.7% of CD patients had perianal disease. CD patients received more biologics than UC patients (odds ratio: 3.20, 95% CI 2.19-4.69 P < .001).Using both a national representative sample and a regional clinic cohort, we find that UC is more common in Colombia and is on the rise in urban regions; especially occurring in an older age cohort when compared to Western countries. Future studies are warranted to understand evolving environmental factors explaining this rise.
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Affiliation(s)
| | - Joshua Kock
- Takeda Pharmaceuticals, Medical Department, Bogotá
- Department of Medicine, Universidad de La Sabana, Chía
| | - Mateo Arrubla
- Department of Internal Medicine, Pontificia Bolivariana University, Medellin
| | - Omar Calixto
- Department of Internal Medicine. Nueva Granada Militar University. Bogotá
| | | | - Lina Cruz
- General Medicine. Medellin Clinic, Medellin Colombia
| | - Juan Hurtado
- Department of Internal Medicine. Universidad de Antioquia
| | - Absalon Clavijo
- Department of Internal Medicine, Pontificia Bolivariana University, Medellin
| | - Jorge Donado
- Department of Internal Medicine, Pontificia Bolivariana University, Medellin
- Department of Epidemiology. Pablo Tobón Uribe Hospital
| | - Seth Schwartz
- Division of Public Health Sciences, University of Miami Miller School of Medicine and Departments of Kinesiology, Health Education, and Educational Psychology, College of Education, University of Texas at Austin
| | - Maria T. Abreu
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami FL USA
| | - Oriana M. Damas
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami FL USA
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10
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Devescovi F, Hurtado J, Taylor PW. Mating-induced changes in responses of female Queensland fruit fly to male pheromones and fruit: A mechanism for mating-induced sexual inhibition. J Insect Physiol 2021; 129:104195. [PMID: 33539917 DOI: 10.1016/j.jinsphys.2021.104195] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
In order to reproduce, female tephritid fruit flies need both mates for fertilization and fruit for oviposition. Virgin females are prone to mating and approach males, attracted by their pheromones. Mated females, however, may experience an abrupt reduction of mating propensity and prioritise the search for suitable fruit rather than additional mates. Accordingly, mating in fruit flies may induce a switch in olfactory preferences of females from pheromones to fruit stimuli, and this switch may also be an important mediator of mating-induced sexual inhibition. To test for mating-induced switches in olfactory preference of female Queensland fruit fly, Bactrocera tryoni, we used wind tunnel assays to assess attraction of mated and virgin females to (1) male sex pheromone delivered through a perforated glass sphere or (2) an entire fruit. Electroantennogram (EAG) responses were also used to test for mating-induced changes in olfactory sensitivity to pheromones and fruit odours. Pheromones elicited quicker upwind responses in virgin females than in mated females; during the first six minutes of trials more virgin females than mated females were observed in the upwind end of the wind tunnel where pheromone odours were released. Fruit cues, in contrast, elicited stronger association with the upwind end of the wind tunnel in mated females than in virgin females from the fifth minute onwards. Also, mated females were observed on the fruit for longer periods than virgin females. EAG responses to pheromones and fruit odours were similar in virgin and mated females, indicating that changes in preferences are not a consequence of changes in peripheral sensitivity of antennae to odours but instead appear to be mediated by post-receptor processing. Our results show that mating reduces attraction to male-produced pheromones and increases attraction to fruit stimuli in B. tryoni females. We propose that this behavioural switch from mating stimuli to oviposition stimuli is an important mediator of mating-induced sexual inhibition in this species.
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Affiliation(s)
- Francisco Devescovi
- Laboratorio de Insectos de Importancia Agronómica, IGEAF (INTA), GV-IABIMO (CONICET), Dr. Nicolás Repetto y De los Reseros s/n, Hurlingham, Buenos Aires, Argentina.
| | - Juan Hurtado
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), CABA, Argentina; Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
| | - Phillip W Taylor
- Applied BioSciences, Macquarie University, North Ryde, NSW 2109, Australia
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Parra J, Hurtado J, Griol A, Sanchis P. Ultra-low loss hybrid ITO/Si thermo-optic phase shifter with optimized power consumption. Opt Express 2020; 28:9393-9404. [PMID: 32225547 DOI: 10.1364/oe.386959] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
Typically, materials with large optical losses such as metals are used as microheaters for silicon based thermo-optic phase shifters. Consequently, the heater must be placed far from the waveguide, which could come at the expense of the phase shifter performance. Reducing the gap between the waveguide and the heater allows reducing the power consumption or increasing the switching speed. In this work, we propose an ultra-low loss microheater for thermo-optic tuning by using a CMOS-compatible transparent conducting oxide such as indium tin oxide (ITO) with the aim of drastically reducing the gap. Using finite element method simulations, ITO and Ti based heaters are compared for different cladding configurations and TE and TM polarizations. Furthermore, the proposed ITO based microheaters have also been fabricated using the optimum gap and cladding configuration. Experimental results show power consumption to achieve a π phase shift of 10 mW and switching time of a few microseconds for a 50 µm long ITO heater. The obtained results demonstrate the potential of using ITO as an ultra-low loss microheater for high performance silicon thermo-optic tuning and open an alternative way for enabling the large-scale integration of phase shifters required in emerging integrated photonic applications.
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12
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Griol A, Peransi S, Rodrigo M, Hurtado J, Bellieres L, Ivanova T, Zurita D, Sánchez C, Recuero S, Hernández A, Simón S, Balka G, Bossis I, Capo A, Camarca A, D'Auria S, Varriale A, Giusti A. Design and Development of Photonic Biosensors for Swine Viral Diseases Detection. Sensors (Basel) 2019; 19:s19183985. [PMID: 31540156 PMCID: PMC6766991 DOI: 10.3390/s19183985] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 09/11/2019] [Accepted: 09/12/2019] [Indexed: 11/26/2022]
Abstract
In this paper we introduce a field diagnostic device based on the combination of advanced bio-sensing and photonics technologies, to tackle emerging and endemic viruses causing swine epidemics, and consequently significant economic damage in farms. The device is based on the use of microring resonators fabricated in silicon nitride with CMOS compatible techniques. In the paper, the designed and fabricated photonic integrated circuit (PIC) sensors are presented and characterized, showing an optimized performance in terms of optical losses (30 dB per ring) and extinction ration for ring resonances (15 dB). Furthermore, the results of an experiment for porcine circovirus 2 (PCV2) detection by using the developed biosensors are presented. Positive detection for different virus concentrations has been obtained. The device is currently under development in the framework of the EU Commission co-funded project SWINOSTICS.
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Affiliation(s)
- Amadeu Griol
- Universitat Politècnica de València Nanophotonics Technology Center, 46022 València, Spain.
| | | | | | - Juan Hurtado
- Universitat Politècnica de València Nanophotonics Technology Center, 46022 València, Spain.
| | - Laurent Bellieres
- Universitat Politècnica de València Nanophotonics Technology Center, 46022 València, Spain.
| | - Teodora Ivanova
- Universitat Politècnica de València Nanophotonics Technology Center, 46022 València, Spain.
| | - David Zurita
- Universitat Politècnica de València Nanophotonics Technology Center, 46022 València, Spain.
| | | | | | | | | | - Gyula Balka
- University of Veterinary Medicine, 1078 Budapest, Hungary.
| | - Ioannis Bossis
- Agricultural University of Athens, 11855 Athens, Greece.
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13
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Gonçalves OSL, Wheeler G, Dalmay T, Dai H, Castro M, Castro P, García-Rupérez J, Ruiz-Tórtola Á, Griol A, Hurtado J, Bellieres L, Bañuls MJ, González D, López-Guerrero JA, Neves-Petersen MT. Detection of miRNA cancer biomarkers using light activated Molecular Beacons. RSC Adv 2019; 9:12766-12783. [PMID: 35515856 PMCID: PMC9063790 DOI: 10.1039/c9ra00081j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 04/07/2019] [Indexed: 12/29/2022] Open
Abstract
Early detection of cancer biomarkers can reduce cancer mortality rate. miRNAs are small non-coding RNAs whose expression changes upon the onset of various types of cancer. Biosensors that specifically detect such biomarkers can be engineered and integrated into point-of-care devices (POC) using label-free detection, high sensibility and compactness. In this paper, a new engineered Molecular Beacon (MB) construct used to detect miRNAs is presented. Such a construct is immobilized onto biosensor surfaces in a covalent and spatially oriented way using the photonic technology Light Assisted Molecular Immobilization (LAMI). The construct consists of a Cy3 labelled MB covalently attached to a light-switchable peptide. One MB construct contains a poly-A sequence in its loop region while the other contains a sequence complementary to the cancer biomarker miRNA-21. The constructs have been characterized by UV-Vis spectroscopy, mass spectrometry and HPLC. LAMI led to the successful immobilization of the engineered constructs onto thiol functionalized optically flat quartz slides and Silicon on Insulator (SOI) sensor surfaces. The immobilized Cy3 labelled MB construct has been imaged using confocal fluorescence microscopy (CFM). The bioavailability of the immobilized engineered MB biosensors was confirmed through specific hybridization with the Cy5 labelled complementary sequence and imaged by CFM and FRET. Hybridization kinetics have been monitored using steady state fluorescence spectroscopy. The label-free detection of miRNA-21 was also achieved by using integrated photonic sensing structures. The engineered light sensitive constructs can be immobilized onto thiol reactive surfaces and are currently being integrated in a POC device for the detection of cancer biomarkers. Photonic based detection strategies of cancer miRNA biomarkers after Light Assisted Molecular Immobilization (LAMI) of peptide-MB biosensor constructs.![]()
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14
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Ruiz-Tórtola Á, Prats-Quílez F, González-Lucas D, Bañuls MJ, Maquieira Á, Wheeler G, Dalmay T, Griol A, Hurtado J, Bohlmann H, Götzen R, García-Rupérez J. Experimental study of the evanescent-wave photonic sensors response in presence of molecular beacon conformational changes. J Biophotonics 2018; 11:e201800030. [PMID: 29664230 DOI: 10.1002/jbio.201800030] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/12/2018] [Indexed: 05/20/2023]
Abstract
An experimental study of the influence of the conformational change suffered by molecular beacon (MB) probes-upon the biorecognition of nucleic acid target oligonucleotides over evanescent wave photonic sensors-is reported. To this end, high sensitivity photonic sensors based on silicon photonic bandgap (PBG) structures were used, where the MB probes were immobilized via their 5' termination. Those MBs incorporate a biotin moiety close to their 3' termination in order to selectively bind a streptavidin molecule to them. The different photonic sensing responses obtained toward the target oligonucleotide detection, when the streptavidin molecule was bound to the MB probes or not, demonstrate the conformational change suffered by the MB upon hybridization, which promotes the displacement of the streptavidin molecule away from the surface of the photonic sensing structure.
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Affiliation(s)
- Ángela Ruiz-Tórtola
- Nanophotonics Technology Center, Universitat Politècnica de València, Valencia, Spain
| | | | - Daniel González-Lucas
- Departamento de Química, IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Valencia, Spain
| | - María-José Bañuls
- Departamento de Química, IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Valencia, Spain
| | - Ángel Maquieira
- Departamento de Química, IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Valencia, Spain
| | - Guy Wheeler
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Tamas Dalmay
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Amadeu Griol
- Nanophotonics Technology Center, Universitat Politècnica de València, Valencia, Spain
| | - Juan Hurtado
- Nanophotonics Technology Center, Universitat Politècnica de València, Valencia, Spain
| | - Helge Bohlmann
- microTEC Gesellschaft für Mikrotechnologie mbH, Duisburg, Germany
| | - Reiner Götzen
- microTEC Gesellschaft für Mikrotechnologie mbH, Duisburg, Germany
| | - Jaime García-Rupérez
- Nanophotonics Technology Center, Universitat Politècnica de València, Valencia, Spain
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15
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Iglesias PP, Soto IM, Soto EM, Calderón L, Hurtado J, Hasson E. Rapid divergence of courtship song in the face of neutral genetic homogeneity in the cactophilic fly Drosophila buzzatii. Biol J Linn Soc Lond 2018. [DOI: 10.1093/biolinnean/bly108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Patricia P Iglesias
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Buenos Aires, Argentina
| | - Ignacio M Soto
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Buenos Aires, Argentina
| | - Eduardo M Soto
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Buenos Aires, Argentina
| | - Luciano Calderón
- CONICET-Instituto de Biología Agrícola de Mendoza (IBAM), Mendoza, Argentina
| | - Juan Hurtado
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Buenos Aires, Argentina
| | - Esteban Hasson
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ecología, Genética y Evolución, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Buenos Aires, Argentina
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16
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Hasson E, De Panis D, Hurtado J, Mensch J. Host Plant Adaptation in Cactophilic Species of theDrosophila buzzatiiCluster: Fitness and Transcriptomics. J Hered 2018; 110:46-57. [DOI: 10.1093/jhered/esy043] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/07/2018] [Indexed: 01/21/2023] Open
Affiliation(s)
- Esteban Hasson
- IEGEBA (CONICET/UBA), Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab 2, Buenos Aires, Argentina
| | - Diego De Panis
- IEGEBA (CONICET/UBA), Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab 2, Buenos Aires, Argentina
| | - Juan Hurtado
- IEGEBA (CONICET/UBA), Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab 2, Buenos Aires, Argentina
| | - Julián Mensch
- IEGEBA (CONICET/UBA), Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab 2, Buenos Aires, Argentina
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17
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Ruiz-Tórtola Á, Prats-Quílez F, González-Lucas D, Bañuls MJ, Maquieira Á, Wheeler G, Dalmay T, Griol A, Hurtado J, García-Rupérez J. High sensitivity and label-free oligonucleotides detection using photonic bandgap sensing structures biofunctionalized with molecular beacon probes. Biomed Opt Express 2018; 9:1717-1727. [PMID: 29675313 PMCID: PMC5905917 DOI: 10.1364/boe.9.001717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/13/2018] [Accepted: 01/24/2018] [Indexed: 05/20/2023]
Abstract
A label-free sensor, based on the combination of silicon photonic bandgap (PBG) structures with immobilized molecular beacon (MB) probes, is experimentally developed. Complementary target oligonucleotides are specifically recognized through hybridization with the MB probes on the surface of the sensing structure. This combination of PBG sensing structures and MB probes demonstrates an extremely high sensitivity without the need for complex PCR-based amplification or labelling methods.
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Affiliation(s)
- Ángela Ruiz-Tórtola
- Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Francisco Prats-Quílez
- Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Daniel González-Lucas
- IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
| | - María-José Bañuls
- IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Ángel Maquieira
- IDM, Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Guy Wheeler
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Tamas Dalmay
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Amadeu Griol
- Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Juan Hurtado
- Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Jaime García-Rupérez
- Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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18
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Jaime MDLA, Hurtado J, Loustalot-Laclette MR, Oliver B, Markow T. Exploring Effects of Sex and Diet on Drosophila melanogaster Head Gene Expression. J Genomics 2017; 5:128-131. [PMID: 29109800 PMCID: PMC5666516 DOI: 10.7150/jgen.22393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 08/15/2017] [Accepted: 10/04/2017] [Indexed: 02/02/2023] Open
Abstract
Gene expression depends on sex and environment. We stringently explored the contributions of these effects in Drosophila melanogaster by rearing three distinct wildtype genotypes on isocaloric diets either high in protein or sugar followed by expression profiling of heads from the sexes. By using different genotypes as replicates we developed robust sex- and diet-biased expression responses.
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Affiliation(s)
- Maria D L A Jaime
- Section of Developmental Genomics, Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Juan Hurtado
- Department of Ecology, Genetics and Evolution, IEGEBA (CONICET-UBA), Faculty of Exact and Natural Sciences, University of Buenos Aires, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.,National Laboratory for the Genomics of Biodiversity, CINVESTAV, Irapuato, Guanajuato, Mexico
| | - Mariana Ramirez Loustalot-Laclette
- Department of Ecology, Genetics and Evolution, IEGEBA (CONICET-UBA), Faculty of Exact and Natural Sciences, University of Buenos Aires, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
| | - Brian Oliver
- Section of Developmental Genomics, Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Therese Markow
- National Laboratory for the Genomics of Biodiversity, CINVESTAV, Irapuato, Guanajuato, Mexico.,Division of Biological Sciences, University of California San Diego, La Jolla CA 92093, USA
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19
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Mensch J, Hurtado J, Zermoglio PF, de la Vega G, Rolandi C, Schilman PE, Markow TA, Hasson E. Enhanced fertility and chill tolerance after cold-induced reproductive arrest in females of temperate species of the Drosophila buzzatii complex. ACTA ACUST UNITED AC 2017; 220:713-721. [PMID: 27956482 DOI: 10.1242/jeb.150540] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 12/06/2016] [Indexed: 11/20/2022]
Abstract
Long-term exposure to low temperatures during adult maturation might decrease fertility after cold recovery as a consequence of carry-over effects on reproductive tissues. This pattern should be more pronounced in tropical than in temperate species as protective mechanisms against chilling injuries are expected to be more effective in the latter. We initially determined the lower thermal thresholds to induce ovarian maturation in four closely related Drosophila species, two inhabiting temperate regions and the other two tropical areas of South America. As expected, only temperate species regularly experience cold-inducing conditions for reproductive arrest during winter in their natural environment. Subsequently, we exposed reproductively arrested and mature females to cold-inducing conditions for reproductive arrest over a long period. Following cold exposure, tropical species exhibited a dramatic fertility decline, irrespective of reproductive status. In contrast, not only were temperate females fecund and fertile but also fertility was superior in females that underwent cold-induced reproductive arrest, suggesting that it might act as a protecting mechanism ensuring fertility after cold recovery. Based on these findings, we decided to evaluate the extent to which reproductive status affects cold tolerance and energy metabolism at low temperature. We found a lower metabolic rate and a higher cold tolerance in reproductively arrested females, although only temperate species attained high levels of chill tolerance. These findings highlight the role of cold-induced reproductive arrest as part of an integrated mechanism of cold adaptation that could potentially contribute to the spread of temperate species into higher latitudes or altitudes.
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Affiliation(s)
- Julián Mensch
- IEGEBA-CONICET-UBA. DEGE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Juan Hurtado
- IEGEBA-CONICET-UBA. DEGE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Paula F Zermoglio
- IEGEBA-CONICET-UBA. DEGE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Gerardo de la Vega
- IBBE-CONICET-UBA. DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Carmen Rolandi
- IBBE-CONICET-UBA. DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Pablo E Schilman
- IBBE-CONICET-UBA. DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
| | - Therese A Markow
- Laboratorio Nacional de Genómica para la Biodiversidad, Guanajuato 36824, México.,Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Esteban Hasson
- IEGEBA-CONICET-UBA. DEGE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
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20
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Larrea RA, Gutiérrez AM, Hurtado J, Ramírez JM, Garrido B, Sanchis P. Compact focusing grating couplers for silicon horizontal slot waveguides. Opt Lett 2017; 42:490-493. [PMID: 28146509 DOI: 10.1364/ol.42.000490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this Letter, we present the design, simulation (2D and 3D), fabrication, and experimental characterization of compact and fully etched focusing gratings for a horizontal slot waveguide based on a silicon nitride layer sandwiched between amorphous silicon and a silicon-on-insulator. The measured coupling losses are about 4 dB with a 3 dB bandwidth of 38 nm. The fully etched configuration allows the fabrication in a single lithography step.
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21
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Molina V, Rauhalahti M, Hurtado J, Fliegl H, Sundholm D, Muñoz-Castro A. Aromaticity introduced by antiferromagnetic ligand mediated metal–metal interactions. Insights from the induced magnetic response in [Cu6(dmPz)6(OH)6]. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00023e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ligand-mediated antiferromagnetic coupling induces aromatic-ring behavior.
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Affiliation(s)
- V. Molina
- Grupo de Química Inorgánica y Materiales Moleculares
- Universidad Autonoma de Chile
- Santiago
- Chile
- Liceo Politécnico Ciencia y Tecnología
| | - M. Rauhalahti
- Department of Chemistry
- University of Helsinki
- Finland
| | - J. Hurtado
- Departamento de Química
- Universidad de los Andes
- Bogotá
- Colombia
| | - H. Fliegl
- Centre for Theoretical and Computational Chemistry (CTCC)
- Department of Chemistry
- University of Oslo
- Oslo
- Norway
| | - D. Sundholm
- Department of Chemistry
- University of Helsinki
- Finland
| | - A. Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares
- Universidad Autonoma de Chile
- Santiago
- Chile
- Doctorado en Fisicoquímica Molecular
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22
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Soto EM, Betti MIL, Hurtado J, Hasson E. Differential responses to artificial selection on oviposition site preferences in Drosophila melanogaster and D. simulans. Insect Sci 2015; 22:821-828. [PMID: 25263841 DOI: 10.1111/1744-7917.12176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/11/2014] [Indexed: 06/03/2023]
Abstract
The preference-performance relationship in plant-insect interactions is a central theme in evolutionary ecology. Among many insects, eggs are vulnerable and larvae have limited mobility, making the choice of an appropriate oviposition site one of the most important decisions for a female. We investigated the evolution of oviposition preferences in Drosophila melanogaster Meigen and Drosophila simulans Sturtevant by artificially selecting for the preference for 2 natural resources, grape and quince. The main finding of our study is the differential responses of D. melanogaster and D. simulans. Although preferences evolved in the experimental populations of D. melanogaster, responses were not consistent with the selection regimes applied. In contrast, responses in D. simulans were consistent with expectations, demonstrating that this species has selectable genetic variation for the trait. Furthermore, crosses between D. simulans divergent lines showed that the genetic factors involved in grape preference appear to be largely recessive. In summary, our artificial selection study suggests that D. melanogaster and D. simulans possess different genetic architectures for this trait.
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Affiliation(s)
- Eduardo M Soto
- Departamento de Ecología, Genética y Evolución, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María I L Betti
- Departamento de Ecología, Genética y Evolución, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Juan Hurtado
- Departamento de Ecología, Genética y Evolución, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Esteban Hasson
- Departamento de Ecología, Genética y Evolución, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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23
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Hurtado J, Iglesias PP, Lipko P, Hasson E. Multiple paternity and sperm competition in the sibling speciesDrosophila buzzatiiandDrosophila koepferae. Mol Ecol 2013; 22:5016-26. [DOI: 10.1111/mec.12436] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/28/2013] [Accepted: 07/03/2013] [Indexed: 11/29/2022]
Affiliation(s)
- J. Hurtado
- Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Instituto de Ecología Genética y Evolución de la ciudad de Buenos Aires; CONICET-Universidad de Buenos Aires (UBA); Ciudad Universitaria; Pabellón II C1428EGA Buenos Aires Argentina
| | - P. P. Iglesias
- Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Instituto de Ecología Genética y Evolución de la ciudad de Buenos Aires; CONICET-Universidad de Buenos Aires (UBA); Ciudad Universitaria; Pabellón II C1428EGA Buenos Aires Argentina
| | - P. Lipko
- Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Instituto de Ecología Genética y Evolución de la ciudad de Buenos Aires; CONICET-Universidad de Buenos Aires (UBA); Ciudad Universitaria; Pabellón II C1428EGA Buenos Aires Argentina
| | - E. Hasson
- Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Instituto de Ecología Genética y Evolución de la ciudad de Buenos Aires; CONICET-Universidad de Buenos Aires (UBA); Ciudad Universitaria; Pabellón II C1428EGA Buenos Aires Argentina
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Hurtado J, Hasson E. Inter and intraspecific variation in female remating propensity in the cactophilic sibling species Drosophila buzzatii and D. koepferae. J Insect Physiol 2013; 59:569-576. [PMID: 23542152 DOI: 10.1016/j.jinsphys.2013.03.007] [Citation(s) in RCA: 3] [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: 01/19/2013] [Revised: 03/19/2013] [Accepted: 03/20/2013] [Indexed: 06/02/2023]
Abstract
Post-mating sexual selection by means of sperm competition or cryptic female choice occurs in species in which females remate before exhausting sperm supplied by previous mates. Thus, sperm competition is expected to be stronger when inseminated females remate more frequently or take longer to deplete sperm load. Previous studies comparing oviposition behavior in the pair of closely related species Drosophila buzzatii and Drosophila koepferae suggest that inseminated females of the latter deplete sperm load more rapidly. Here, we investigate female remating in D. buzzatii and D. koepferae by studying how female remating propensity changes after mating. Our study reveals that, after mating, female D. buzzatii recovers receptivity 14 times faster and remate more frequently than D. koepferae. Thus, we argue that D. buzzatii exhibits greater chances that sperm from different mates meet inside the same female suggesting more complex post-mating interactions than in its sibling. In addition, our results show that there is intraspecific genetic variation for the duration of female refractory period in both species.
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Affiliation(s)
- Juan Hurtado
- Instituto de Ecología Genética y Evolución de la ciudad de Buenos Aires, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina.
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25
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Cardinal-Fernández P, García Gabarrot G, Echeverria P, Zum G, Hurtado J, Rieppi G. Clinical and microbiological aspects of acute community-acquired pneumonia due to Streptococcus pneumoniae. Rev Clin Esp 2013. [DOI: 10.1016/j.rceng.2012.12.001] [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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Cardinal-Fernández P, García Gabarrot G, Echeverria P, Zum G, Hurtado J, Rieppi G. Aspectos clínicos y microbiológicos de la neumonía aguda comunitaria a Streptococcus pneumoniae. Rev Clin Esp 2013. [DOI: 10.1016/j.rce.2012.09.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Solís J J, Guerra-García R. R, Acosta S, Hurtado J. Secreción de prolactina en hombres nativos de las grandes alturas. An Fac med 2013. [DOI: 10.15381/anales.v72i1.1102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Objetivos: Determinar el efecto de la hipoxia crónica sobre la secreción de prolactina. Diseño: Estudio comparativo. Institución: Servicio de Endocrinología, Hospital Nacional Arzobispo Loayza, Lima, Perú. Participantes: Hombres jóvenes nativos de Lima y Cerro de Pasco. Intervenciones: Se estudió en forma dinámica tres grupos de hombres jóvenes normales de edad (X24a) y estado nutricional comparable, nativos de diferentes altitudes: 150 m.s.n.m. (Lima, N=10), 3 000 m.s.n.m. (Tarma, N= 10), 4 200 m.s.n.m. (Cerro de Pasco, n=11); y tres pacientes con mal de montaña crónico (MMC) nativos de Cerro de Pasco; todos clínicamente eutiroideos y sin bocio. En cada sujeto se determinó por RIA los niveles séricos basales de PRL y su respuesta. Principales medidas de resultados: Diferencia de niveles séricos de prolactina y su respuesta máxima a la hormona liberadora de tirotropina en sujetos a nivel del mar y en la altura. Resultados: Los niveles séricos basales de prolactina (PRL) y su respuesta máxima a la hormona liberadora de tirotropina (TRH) fueron significativamente menores en los nativos de altura en comparación con los del nivel del mar. La causa subyacente sería la hipoxia crónica, pudiendo estar implicados un incremento de la actividad dopaminérgica del sistema túbero – infundibular o una alteración a nivel del receptor o posreceptor del lactotrofo en los nativos de altura. Este hecho puede ser un mecanismo de adaptación para la conservación de la fertilidad en los hombres nativos de las grandes alturas. El escaso número de pacientes con mal de montaña crónico no permitió obtener resultados concluyentes, pero se observó persistencia de la menor secreción de prolactina, con una respuesta más tardía a la TRH. Se requiere más investigaciones en pacientes con MMC, para definir estas observaciones. Conclusiones: Los niveles séricos basales de prolactina y su respuesta máxima a la hormona liberadora de tirotropina fueron significativamente menores en los nativos de altura en comparación con los del nivel del mar.
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Chowell G, Viboud C, Simonsen L, Miller MA, Hurtado J, Soto G, Vargas R, Guzman MA, Ulloa M, Munayco CV. The 1918-1920 influenza pandemic in Peru. Vaccine 2012; 29 Suppl 2:B21-6. [PMID: 21757099 DOI: 10.1016/j.vaccine.2011.02.048] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Revised: 01/13/2011] [Accepted: 02/15/2011] [Indexed: 11/24/2022]
Abstract
BACKGROUND Increasing our knowledge of past influenza pandemic patterns in different regions of the world is crucial to guide preparedness plans against future influenza pandemics. Here, we undertook extensive archival collection efforts from three representative cities of Peru-Lima in the central coast, Iquitos in the northeastern Amazon region, Ica in the southern coast-to characterize the temporal, age and geographic patterns of the 1918-1920 influenza pandemic in this country. MATERIALS AND METHODS We analyzed historical documents describing the 1918-1920 influenza pandemic in Peru and retrieved individual mortality records from local provincial archives for quantitative analysis. We applied seasonal excess mortality models to daily and monthly respiratory mortality rates for 1917-1920 and quantified transmissibility estimates based on the daily growth rate in respiratory deaths. RESULTS A total of 52,739 individual mortality records were inspected from local provincial archives. We found evidence for an initial mild pandemic wave during July-September 1918 in Lima, identified a synchronized severe pandemic wave of respiratory mortality in all three locations during November 1918-February 1919, and a severe pandemic wave during January 1920-March 1920 in Lima and July-October 1920 in Ica. There was no recrudescent pandemic wave in 1920 in Iquitos. Remarkably, Lima experienced the brunt of the 1918-1920 excess mortality impact during the 1920 recrudescent wave, with all age groups experiencing an increase in all cause excess mortality from 1918-1919 to 1920. Middle age groups experienced the highest excess mortality impact, relative to baseline levels, in the 1918-1919 and 1920 pandemic waves. Cumulative excess mortality rates for the 1918-1920 pandemic period were higher in Iquitos (2.9%) than Lima (1.6%). The mean reproduction number for Lima was estimated in the range 1.3-1.5. CONCLUSIONS We identified synchronized pandemic waves of intense excess respiratory mortality during November 1918-February 1919 in Lima, Iquitos, Ica, followed by asynchronous recrudescent waves in 1920. Cumulative data from quantitative studies of the 1918 influenza pandemic in Latin American settings have confirmed the high mortality impact associated with this pandemic. Further historical studies in lesser studied regions of Latin America, Africa, and Asia are warranted for a full understanding of the global impact of the 1918 pandemic virus.
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Affiliation(s)
- G Chowell
- Mathematical, Computational & Modeling Sciences Center, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA.
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Nin N, Lorente JA, Soto L, Ríos F, Hurtado J, Arancibia F, Ugarte S, Echevarría E, Cardinal P, Saldarini F, Bagnulo H, Cortés I, Bujedo G, Ortega C, Frutos F, Esteban A. Acute kidney injury in critically ill patients with 2009 influenza A (H1N1) viral pneumonia: an observational study. Intensive Care Med 2011; 37:768-74. [PMID: 21394630 PMCID: PMC7095219 DOI: 10.1007/s00134-011-2167-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 10/22/2010] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To describe the incidence, risk factors, and impact on mortality of acute kidney injury (AKI) in patients with 2009 influenza A (H1N1) viral pneumonia requiring mechanical ventilation. DESIGN Observational cohort study. PATIENTS AND METHODS AKI was defined as risk, injury or failure, according to the RIFLE classification. Early and late AKI were defined as AKI occurring on intensive care unit (ICU) day 2 or before, or after ICU day 2, respectively. Demographic data and information on organ dysfunction were collected daily. RESULTS Of 84 patients, AKI developed in 43 patients (51%). Twenty (24%) needed renal replacement therapy. Early and late AKI were found in 28 (33%) and 15 (18%) patients, respectively. Patients with AKI, as compared with patients without AKI, had higher Acute Physiology and Chronic Health Evaluation (APACHE) II score and ICU mortality (72% versus 39%, p < 0.01) and presented on admission more marked cardiovascular, respiratory, and hematological dysfunction. Patients with early but not late AKI presented on admission higher APACHE II score and more marked organ dysfunction, as compared with patients without AKI. ICU mortality was higher in late versus early AKI (93% versus 61%, p < 0.001). On multivariate analysis, only APACHE II score and late but not early AKI [odds ratio (OR) 1.1 (95% confidence interval 1.0-1.1) and 15.1 (1.8-130.7), respectively] were associated with mortality. CONCLUSIONS AKI is a frequent complication of 2009 influenza A (H1N1) viral pneumonia. AKI developing after 2 days in ICU appears to be associated with different risk factors than early AKI, and is related to a higher mortality rate.
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Affiliation(s)
- N. Nin
- Intensive Care Department, Hospital Universitario de Getafe & CIBER de Enfermedades Respiratorias, Carretera de Toledo Km 12,500, 28905 Getafe, Madrid Spain
| | - J. A. Lorente
- Intensive Care Department, Hospital Universitario de Getafe & CIBER de Enfermedades Respiratorias, Carretera de Toledo Km 12,500, 28905 Getafe, Madrid Spain
| | - L. Soto
- Instituto Nacional del Tórax, Santiago de Chile, Chile
| | - F. Ríos
- Hospital Nacional Profesor A. Posadas, El Palomar, Argentina
| | - J. Hurtado
- Hospital Español Juan J. Crottogini, Montevideo, Uruguay
| | - F. Arancibia
- Instituto Nacional del Tórax, Santiago de Chile, Chile
| | - S. Ugarte
- Clínica Indisa, Santiago de Chile, Chile
| | | | - P. Cardinal
- Sanatorio CASMU, Montevideo, Uruguay
- Hospital Central de las Fuerzas Armada, Montevideo, Uruguay
| | - F. Saldarini
- Hospital Donación Francisco Santojanni (CABA), Buenos Aires, Argentina
| | | | - I. Cortés
- Intensive Care Department, Hospital Universitario de Getafe & CIBER de Enfermedades Respiratorias, Carretera de Toledo Km 12,500, 28905 Getafe, Madrid Spain
| | - G. Bujedo
- Universidad Católica de Chile, Santiago, Chile
| | - C. Ortega
- Hospital Regional de Concepción, Concepción, Chile
| | - F. Frutos
- Intensive Care Department, Hospital Universitario de Getafe & CIBER de Enfermedades Respiratorias, Carretera de Toledo Km 12,500, 28905 Getafe, Madrid Spain
| | - A. Esteban
- Intensive Care Department, Hospital Universitario de Getafe & CIBER de Enfermedades Respiratorias, Carretera de Toledo Km 12,500, 28905 Getafe, Madrid Spain
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García-Meca C, Hurtado J, Martí J, Martínez A, Dickson W, Zayats AV. Low-loss multilayered metamaterial exhibiting a negative index of refraction at visible wavelengths. Phys Rev Lett 2011; 106:067402. [PMID: 21405495 DOI: 10.1103/physrevlett.106.067402] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 01/07/2011] [Indexed: 05/16/2023]
Abstract
We experimentally demonstrate a low-loss multilayered metamaterial exhibiting a double-negative refractive index in the visible spectral range. To this end, we exploit a second-order magnetic resonance of the so-called fishnet structure. The low-loss nature of the employed magnetic resonance, together with the effect of the interacting adjacent layers, results in a figure of merit as high as 3.34. A wide spectral range of negative index is achieved, covering the wavelength region between 620 and 806 nm with only two different designs.
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Affiliation(s)
- Carlos García-Meca
- Nanophotonics Technology Center, Universidad Politécnica de Valencia, 46022 Valencia, Spain.
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Anzueto A, Frutos-Vivar F, Esteban A, Bensalami N, Marks D, Raymondos K, Apezteguia C, Arabi Y, Hurtado J, Gonzalez M, Tomicic V, Abroug F, Elizalde J, Cakar N, Pelosi P, Ferguson ND. Influence of body mass index on outcome of the mechanically ventilated patients. Thorax 2010; 66:66-73. [DOI: 10.1136/thx.2010.145086] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Soto IM, Soto EM, Carreira VP, Hurtado J, Fanara JJ, Hasson E. Geographic patterns of inversion polymorphism in the second chromosome of the cactophilic Drosophila buzzatii from northeastern Argentina. J Insect Sci 2010; 10:181. [PMID: 21062144 PMCID: PMC3016981 DOI: 10.1673/031.010.14141] [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] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Accepted: 05/19/2010] [Indexed: 05/30/2023]
Abstract
The inversion polymorphisms of the cactophilic Drosophila buzzatti Patterson and Wheeler (Diptera: Drosophilidae) were studied in new areas of its distribution in Argentina. A total of thirty-eight natural populations, including 29 from previous studies, were analyzed using multiple regression analyses. The results showed that about 23% of total variation was accounted for by a multiple regression model in which only altitude contributed significantly to population variation, despite the fact that latitude and longitude were also included in the model. Also, inversion frequencies exhibited significant associations with mean annual temperature, precipitation, and atmospheric pressure. In addition, expected heterozygosity exhibited a negative association with temperature and precipitation and a positive association with atmospheric pressure. The close similarity of the patterns detected in this larger dataset to previous reports is an indication of the stability of the clines. Also, the concurrence of the clines detected in Argentina with those reported for colonizing populations of Australia suggests the involvement of natural selection as the main mechanism shaping inversion frequencies in D. buzzatii.
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Affiliation(s)
- Ignacio M. Soto
- Departamento de Ecología, Genética y Evolución. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Argentina
| | - Eduardo M. Soto
- Departamento de Ecología, Genética y Evolución. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Argentina
| | - Valeria P. Carreira
- Departamento de Ecología, Genética y Evolución. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Argentina
| | - Juan Hurtado
- Departamento de Ecología, Genética y Evolución. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Argentina
| | - Juan J. Fanara
- Departamento de Ecología, Genética y Evolución. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Argentina
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Vivien L, Marris-Morini D, Griol A, Gylfason KB, Hill D, Lvarez J, Sohlström H, Hurtado J, Bouville D, Cassan E. Vertical multiple-slot waveguide ring resonators in silicon nitride. Opt Express 2008; 16:17237-17242. [PMID: 18958004 DOI: 10.1364/oe.16.017237] [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: 05/27/2023]
Abstract
This article describes the first demonstration of ring resonators based on vertical multiple-slot silicon nitride waveguides. The design, fabrication and measurement of multiple-slot waveguide ring resonators with several coupling distances and ring radii (70 microm, 90 microm and 110 microm) have been carried out for TE and TM polarizations at the wavelength of 1.3 microm. Quality factors of 6,100 and 16,000 have been achieved for TE and TM polarization, respectively.
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Affiliation(s)
- Laurent Vivien
- Institut d'Electronique Fondamentale, CNRS UMR 8622, Université Paris-Sud 11, Orsay cedex, France.
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Ramos W, Galarza C, Ronceros G, de Amat F, Teran M, Pichardo L, Juarez D, Anaya R, Mayhua A, Hurtado J, Ortega-Loayza AG. Noninfectious dermatological diseases associated with chronic exposure to mine tailings in a Peruvian district. Br J Dermatol 2008; 159:169-74. [PMID: 18510675 DOI: 10.1111/j.1365-2133.2008.08630.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Mine tailings are metallic wastes which are deposited in the environment due to mining activity. Long-term exposure to these metals is harmful to human health. OBJECTIVE To determine if chronic exposure to mine tailings constitutes a risk factor for the development of dermatological diseases in the district of San Mateo de Huanchor (Lima, Peru). METHODS An observational case-control study was carried out in the communities of Mayoc, Daza and Tamboraque (exposed to mine tailings, case group) located in the district of San Mateo de Huanchor, and also in the communities of Choccna and Caruya (not exposed to mine tailings, control group) located in the same district. Out of 230 adults, 121 were exposed and 109 were not exposed to mine tailings and out of 135 children, 71 were exposed and 64 were not exposed to mine tailings. RESULTS In the adult group, 71% of the exposed cases had some noninfectious dermatological disease while in the nonexposed group the frequency was 34% [P < 0.001; odds ratio (OR) 5.40; 95% confidence interval (CI) 3.02-9.68]. A statistically significant difference between groups was found for arsenical dermatitis, nonpruritic papulovesicular eruption, atopic dermatitis, contact dermatitis, seborrhoeic dermatitis and xerosis. In the paediatric population, 71 exposed and 64 nonexposed children were evaluated. Sixty-nine per cent of the exposed group had some noninfectious dermatological disease vs. 30% in the nonexposed group (P < 0.001; OR 6.00; 95% CI 2.71-13.31). A statistically significant difference between groups was found for xerosis and atopic dermatitis. CONCLUSION Chronic exposure to mine tailings represents a risk factor for development of noninfectious dermatological diseases in both adults and children.
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Affiliation(s)
- W Ramos
- Instituto de Investigaciones Clínicas de la Universidad Nacional Mayor de San Marcos, Lima, Peru
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Valdesuso R, Lacunza J, Jimeno J, Rodriguez J, Hurtado J, Pinar E, García J, Valdés M. Transulnar approach for cardiac catheterization: incidence of complication and how to reduce it. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Martinez-Sanchez J, Garcia-Alberola A, Sanchez-Mu oz J, Cerdan-Sanchez M, Teruel-Carrillo F, Hurtado J, Ruiperez-Abizanda J, Valdes-Chavarri M. 141 Usefulness of incremental atrial pacing for evaluating the effectiveness of perinodal slow pathway ablation. Europace 2005. [DOI: 10.1016/eupace/7.supplement_1.21-a] [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: 11/28/2022] Open
Affiliation(s)
| | | | | | | | | | - J. Hurtado
- University Hospital Virgen Arrixaca, Cardiology, El Palmag Spain
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Melero R, Adrados M, Fuentes I, Carrillo R, Casado J, Hurtado J, Caramelo C, Martín J. [Progressive deterioration in an elderly patient]. Nefrologia 2004; 24 Suppl 3:64-7. [PMID: 15219072] [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: 04/30/2023] Open
Abstract
Vasculitis is diagnosed with increasing frequency in the elderly. We hereby present the case of an 84-year-old male, who had weight loss, low-degree fever, anemia and epigastric pain. After 14 days of study with the tentative diagnosis of digestive neoplasia, a progressive renal insufficiency was detected. This clinical picture was secondary to ANCA-positive vasculitis. The case poses the differential diagnosis of non-oliguric acute renal failure (FRA) in elder people and the systematics of the study of renal insufficiency in individuals with previously unknown renal function. Also, this patient's history emphasizes the importance of acute deterioration of renal function as a guiding symptom for orienting the interpretation of clinical data. In the present case, a diagnostic hypothesis based only in the pursue of an occult digestive tumor misguided the attention from the main cause of the disease.
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Affiliation(s)
- R Melero
- Servicio de Nefrología de la Fundación Jiménez Díaz, Madrid
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Abstract
Hypercalcaemia is a common paraneoplastic syndrome caused by the production by tumours of several factors which affect bone resorption and/or tubular calcium reabsorption. Antihypercalcaemic therapy in cancer patients involves rehydration manoeuvres, as well as the use of a variety of available drugs which inhibit bone resorption, namely plicamycin, calcitonin, bisphosphonates and gallium nitrate. While plicamycin is currently out of use because of its considerable toxicity, bisphosphonates have become the standard therapy in hypercalcaemia of malignancy (HM). These compounds are potent inhibitors of bone resorption but they do not affect tubular calcium reabsorption, which limits their efficacy in humoral HM (HHM) cases. In these patients, gallium nitrate should be the therapy of choice. Among the available bisphosphonates, pamidronate administered in a single infusion of 90 mg, normalises serum calcium levels in > 90% of HM patients. A recently introduced bisphosphonate, zoledronate, is likely to replace pamidronate as a first-line therapy in these patients. The effectiveness of calcitonin in HM treatment is limited, although it seems to be useful at the outset in cases with severe symptomatic hypercalcaemia. Future treatment options of HM are likely to include new bone resorption inhibitors, for example, naturally-occurring osteoprotegerin, or alternate approaches aimed at reducing the tumour production of parathyroid hormone-related protein with noncalcaemic analogues of calcitriol or ras-isoprenylation inhibitors. The development of putative therapeutic agents targeted to inhibit distal calcium reabsorption should be valuable in the management of HHM cases.
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Affiliation(s)
- J Hurtado
- Bone and Mineral Research Laboratory, Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
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Motellón JL, Jiménez FJ, de Miguel F, Jaras MJ, Díaz A, Hurtado J, Esbrit P. Relationship of plasma bone cytokines with hypercalcemia in cancer patients. Clin Chim Acta 2000; 302:59-68. [PMID: 11074064 DOI: 10.1016/s0009-8981(00)00352-1] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The pathogenesis of cancer-associated hypercalcemia is not yet completely understood. This syndrome appears to be a consequence of the tumor production of humoral factors, mainly parathyroid hormone related protein (PTHrP). However, patients with humoral hypercalcemia of malignancy have features suggesting that factors other than PTHrP might play a role in this syndrome. We performed a case-control study in cancer patients with and without hypercalcemia. A total of 105 patients with a variety of tumors, 60 of them with hypercalcemia (corrected serum calcium over 2.6 mmol/l), and 45 without hypercalcemia. In a previous study, we demonstrated that plasma PTHrP was highly associated with hypercalcemia in these patients. In the present study, we measured the plasma levels of various bone cytokines: interleukin-1beta (IL-1beta), interleukin-6 (IL-6), transforming growth factor (TGF) alpha, and tumor necrosis factor (TNF) alpha, in these cancer patients. We also determined C-terminal type I procollagen (PICP) and C-terminal telopeptide of type I collagen (ICTP), bone formation and bone resorption markers, respectively, in serum in these patients. We found that these osteolytic cytokines do not increase in plasma by the presence of hypercalcemia. In fact, using a logistic regression analysis, a significant (P<0.02) association was found between the low plasma levels of IL-1beta and TGFalpha and hypercalcemia, independent of plasma PTHrP and the presence of bone metastasis, in these patients. No significant association between the plasma levels of IL-6 or TNFalpha and hypercalcemia was found in these cancer patients. Serum ICTP correlated (r=0.35; P=0.008) with hypercalcemia in these patients, but none of the cytokines studied in plasma correlated with either ICTP or PICP in these hypercalcemic patients. Our data indicate that the circulating levels of several bone cytokines are not enhanced by PTHrP in hypercalcemic cancer patients. The mechanism responsible for the association between the low plasma levels of some of these cytokines and hypercalcemia in these patients remains obscure. However, this finding does not rule out the possible local bone effects of these cytokines, contributing to hypercalcemia in cancer patients.
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Affiliation(s)
- J L Motellón
- Department of Nephrology, Hospital de la Princesa, Madrid, Spain
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Motellón JL, Javort Jiménez F, de Miguel F, Jaras MJ, Díaz A, Hurtado J, Esbrit P. Parathyroid hormone-related protein, parathyroid hormone, and vitamin D in hypercalcemia of malignancy. Clin Chim Acta 2000; 290:189-97. [PMID: 10660809 DOI: 10.1016/s0009-8981(99)00181-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The pathogenesis of cancer-associated hypercalcemia is not yet completely understood. In the majority of cancer patients, hypercalcemia appears to be a consequence of the tumor production of parathyroid hormone (PTH)-related protein (PTHrP). However, patients with humoral hypercalcemia of malignancy, in contrast to those with primary hyperparathyroidism, have an uncoupled bone turnover, and they usually have low circulating levels of 1.25(OH)2D3. We performed a case-control study to assess the relationship of plasma PTHrP, PTH and 1.25(OH)2D3 with hypercalcemia in cancer patients with a variety of tumors. Sixty of these patients had hypercalcemia, and 45 were normocalcemic. We measured PTHrP and PTH by immunoradiometric assay (Nichols), and 1.25(OH)2D3 by radioreceptor assay (Nichols), in plasma in both groups of cancer patients. Using a logistic regression analysis, we found that the higher PTHrP in plasma, the higher association with hypercalcemia occurred in these patients. In addition, the decreased plasma levels of PTH and 1.25(OH)2D3 in the majority of cancer patients were found to be significantly associated with hypercalcemia. Our results indicate that the combined determination of PTH, PTHrP and 1.25(OH)2D3 in plasma represents a more comprehensive approach to the investigation of hypercalcemia in cancer patients. Our data also support the role of PTHrP as a humoral factor responsible for hypercalcemia in these patients.
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Affiliation(s)
- J L Motellón
- Department of Nephrology, Hospital de la Princesa, Madrid, Spain
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de Miguel F, Motellón JL, Hurtado J, Jiménez FJ, Esbrit P. Comparison of two immunoradiometric assays for parathyroid hormone-related protein in the evaluation of cancer patients with and without hypercalcemia. Clin Chim Acta 1998; 277:171-80. [PMID: 9853700 DOI: 10.1016/s0009-8981(98)00127-2] [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: 10/16/2022]
Abstract
Hypercalcemia is a common paraneoplastic syndrome due to the secretion by tumors of parathyroid hormone-related protein (PTHrP) and/or other osteolytic factors. In the present study, we have measured plasma PTHrP using two immunoradiometric assays for PTHrP, assay N (Nichols) and assay I (INCSTAR), recognizing the 1-86 domain of PTHrP, for the evaluation of malignancy-associated hypercalcemia. The study included 25 tumor patients with hypercalcemia (HCa) [corrected serum calcium (SCa) > or = 2.70 mmol/L], 20 normocalcemic patients with cancer (NCa), and ten healthy control subjects. Plasma PTHrP was either undetectable or within the respective normal range in the majority of NCa patients and in the control subjects, with both assays. Plasma PTHrP was increased in 13 and 15 of HCa cases with assay N and assay I, respectively. PTHrP was elevated in plasma in 5/6 (assay N) and 3/6 (assay I) HCa patients with squamous tumors. However, plasma PTHrP was high in only 2/9 (assay N) and 1/9 (assay I) HCa cases with hematological tumors. Less than 40% of HCa patients with bone metastases, and >75% of those without bone involvement, had elevated plasma PTHrP with both assays. Detectable plasma PTHrP and SCa were significantly correlated using assay N (p = 0.025) and assay I (p = 0.01), in the HCa group. A highly significant correlation (p <0.001) was found between detectable plasma PTHrP with both assays, and a high agreement between them based on simple kappa statistics (p < 0.001), in the latter group. Our results indicate that each assay may be similarly useful in detecting PTHrP hyperproduction in cancer patients.
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Affiliation(s)
- F de Miguel
- Research Unit, Fundación Jiménez Díaz, Madrid, Spain
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Abstract
Trace metal concentrations (Pb, Cd, Cu and Zn) in Sydney rock oysters (Sacostera commercialis) and sediments (< 53 microns fraction) were determined for six sites in the northern regions of Botany Bay. Levels for lead, cadmium, copper and zinc in oysters ranged (in microgram g-1) from 1.38 to 15.3, 1.81 to 16.3, 56.1 to 212 and 1806 to 2902, respectively. In sediments, levels ranged (in microgram g-1) from 599 to 4081, 3.57 to 91.0, 191 to 1113 and 227 to 1472, respectively. Such values indicated high levels of contamination, especially in the sediments. Indeed, high proportions of the samples displayed metal concentrations that exceeded the prescribed limits for oysters and sediments. No significant correlations in metal concentrations were found between oysters and sediments, suggesting that changes in the sediment metal loading are not solely influencing the levels of bioavailable metal. The results supported the conclusion that different rates and mechanisms of metal accumulation are taking place in the two types of samples. Variability between sites was high, particularly for oysters. Multidimensional scaling identified that the Cooks River (site 3) and La Perouse (site 6) sites were most dissimilar, both to each other as well as to the other four sites. This was a reflection of high contamination in the Cooks River and the generally low levels in the La Perouse reference sample. The configuration was mainly influenced by the sediment parameters, rather than the oyster metal concentrations, indicating the sediment data were better for identifying site similarities. These ordinations provide evidence of the usefulness of multidimensional scaling in elucidating the physico-chemical variability of the sampling sites.
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Affiliation(s)
- W J Hayes
- Department of Chemistry, Faculty of Business and Technology, University of Western Sydney, Campbelltown, NSW, Australia.
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López-Durán L, García-López A, Durán L, Hurtado J, Ruiz C, Rodrigo JL. Cardiopulmonary and haemodynamic changes during total hip arthroplasty. Int Orthop 1997; 21:253-8. [PMID: 9349963 PMCID: PMC3617689 DOI: 10.1007/s002640050161] [Citation(s) in RCA: 7] [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: 02/05/2023]
Abstract
We report a prospective study of 30 patients who underwent total hip arthroplasty for osteoarthrosis in order to investigate the haemodynamic and respiratory changes which occur during operation. Cement was used in 17 cases and the implants were not cemented in 13. Pulmonary and cardiac function, blood levels of methylmethacrylate monomer, intramedullary pressure and transoesophageal echocardiography were recorded. Two well differentiated echogenic patterns appeared consistently during the operation. The intramedullary pressure became raised as the cement was inserted. The following changes occurred within seconds and continued for some minutes: elevation of mean arterial pressure and mean pulmonary artery pressure; decrease of arterial oxygen tension and of mixed venous PO2, and greater tissue consumption of oxygen. Although we recorded raised concentration of methylmethacrylate monomer in venous blood after the cement was inserted, there is no evidence that the monomer is responsible for the haemodynamic changes which take place.
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Affiliation(s)
- L López-Durán
- Orthopaedic Surgery and Traumatology Service, University Hospital San Carlos, Madrid
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Abstract
OBJECTIVE To determine the presence of tricuspid regurgitation (TR) in patients affected by acute lung injury (ALI) and the adult respiratory distress syndrome (ARDS) during mechanical ventilation with positive end-expiratory pressure (PEEP). DESIGN A prospective clinical study. SETTING 10-bed general intensive care unit in a University Hospital. PATIENTS 7 consecutive patients an age 44.7 +/- 8.6 years with a diagnosis of ALI or ARDS were studied. All were on mechanical ventilation with PEEP. INTERVENTIONS PEEP was increased in steps of 5 cm H2O until the appearance of TR or up to a limit of 20 cm H2O. MEASUREMENTS AND RESULTS Right atrial pressure, pulmonary artery pressure, and wedge pressure were measured and cardiac output was determined by thermodilution. TR was graded from 0 to 3. Standard 2D echocardiographic and pulsed-wave images were obtained at each level of PEEP. PEEP was increased from 4 +/- 3 to 17 +/- 2 cm H2O. Mean PAP increased from 27.7 +/- 2.9 to 36.7 +/- 3.5 mm Hg (p < 0.02) when PEEP was increased. Five patients had competent valves and two had mild TR at baseline. In six out of the seven, TR either developed or increased when PEEP was increased. CONCLUSIONS Our study demonstrated the development of TR after the use of PEEP in patients with ALI and ARDS as a consequence of pulmonary hypertension and right ventricular overloading. Since TR may randomly affect cardiac output values and derived parameters, the assessment of cardiac performance by some techniques such as thermodilution should be used with caution.
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Affiliation(s)
- H Artucio
- Intensive Care Department, Hospital de Clinicas (University Hospital), Universidad de la Republica, Montevideo, Uruguay
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DeBenedette MA, Chu NR, Pollok KE, Hurtado J, Wade WF, Kwon BS, Watts TH. Role of 4-1BB ligand in costimulation of T lymphocyte growth and its upregulation on M12 B lymphomas by cAMP. J Exp Med 1995; 181:985-92. [PMID: 7532686 PMCID: PMC2191935 DOI: 10.1084/jem.181.3.985] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
K46J B lymphomas express a T cell costimulatory activity that is not inhibited by CTLA-4Ig, anti-B7-1, anti-B7-2, anti-intercellular adhesion molecule 1 or antibodies to heat stable antigen. In this paper we report that this costimulatory activity is mediated at least in part by 4-1BB ligand, a member of the tumor necrosis factor (TNF) gene family that binds to 4-1BB, a T cell activation antigen with homology to the TNF/nerve growth factor receptor family. A fusion protein between 4-1BB and alkaline phosphatase (4-1BB-AP) blocks T cell activation by K46J lymphomas in both an antigen-specific system and with polyclonally (anti-CD3) activated T cells. 4-1BB-AP also blocks antigen presentation by normal spleen cells. When the antigen-presenting cells express B7 molecules as well as 4-1BB ligand, we find that B7 molecules and 4-1BB-AP both contribute to T cell activation. These data suggest that 4-1BB ligand plays an important role in costimulation of IL-2 production and proliferation by T cells. The B lymphoma M12 expresses low levels of 4-1BB-L but can be induced to express higher levels by treatment of the B cells with cAMP, which also induces B7-1 and B7-2 in these cells. Thus cAMP appears to coordinately induce several costimulatory molecules on B cells.
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Affiliation(s)
- M A DeBenedette
- Department of Immunology, University of Toronto, Ontario, Canada
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Abstract
The human homologue of 4-1BB (H4-1BB) cDNA was isolated from PMA plus ionomycin-treated human peripheral T-cell cDNA libraries. The amino acid sequence deduced from the nucleotide sequence showed that the protein is composed of 255 amino acids with 2 potential N-linked glycosylation sites. The molecular weight of its protein backbone is calculated to be 27 kDa. The H4-1BB contains features such as signal sequence and transmembrane domain, indicating that it is a receptor protein. This protein showed 60% identity of amino acid sequence to mouse 4-1BB. In the cytoplasmic domain there are 5 regions of amino acid sequences conserved from mouse to human, indicating that these residues might be important in the 4-1BB function. H4-1BB mRNA was detected in unstimulated peripheral blood T cells and was inducible in T-cell lines such as Jurkat and CEM. H4-1BB-AP, a fusion protein between the H4-1BB extracellular domain and alkaline phosphatase, was used to identify the ligand for the H4-1BB. Although the H4-1BB ligand was detected in both T and B cells of human peripheral blood, the ligand was preferentially expressed in primary B cells and B-cell lines. Daudi, a B-cell lymphoma, was one of the B-cell lines that carried a higher number of ligands. Scatchard analysis showed that the Kd = 1.4 x 10(9) M and the number of ligands in Daudi cell was 4.2 x 10(3).
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MESH Headings
- 3T3 Cells
- 4-1BB Ligand
- Amino Acid Sequence
- Animals
- Antigens, CD
- B-Lymphocytes/metabolism
- Base Sequence
- DNA, Complementary/genetics
- Humans
- Leukemia-Lymphoma, Adult T-Cell/pathology
- Lymphocyte Activation
- Membrane Glycoproteins/chemistry
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/isolation & purification
- Mice
- Molecular Sequence Data
- Molecular Weight
- Peptide Fragments/genetics
- Peptide Fragments/metabolism
- Polymerase Chain Reaction
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Protein Structure, Tertiary
- RNA, Messenger/analysis
- Receptors, Nerve Growth Factor/chemistry
- Receptors, Nerve Growth Factor/genetics
- Receptors, Nerve Growth Factor/isolation & purification
- Receptors, Tumor Necrosis Factor/chemistry
- Receptors, Tumor Necrosis Factor/genetics
- Receptors, Tumor Necrosis Factor/isolation & purification
- Recombinant Fusion Proteins/metabolism
- Sequence Alignment
- Sequence Homology, Amino Acid
- Species Specificity
- T-Lymphocytes/drug effects
- T-Lymphocytes/metabolism
- Tumor Cells, Cultured
- Tumor Necrosis Factor Receptor Superfamily, Member 9
- Tumor Necrosis Factor-alpha/chemistry
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Affiliation(s)
- Z Zhou
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis 56202-5120, USA
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Talavera Sánchez J, Gómez Fiñana MS, Mauri J, Hurtado J, Polo I, Alemán O. [Thyroplasty in the treatment of functional or paralytic dysphonias]. Acta Otorrinolaringol Esp 1994; 45:461-4. [PMID: 7873239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In phonosurgery, the laryngeal framework surgery, with several types of thyroplasty, allow a modification of the vocal function through an indirect action over the thyroid cartilage, without surgical invasion of the vocal fold tissues. We describe our experience and review the literature in this field.
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Rodrigo JL, Alfonso F, Aubele A, Mataix L, Hurtado J, Duran L, Sanchez-Barba A, Lopez Duran L, Zarco P. Transesophageal echocardiographic right atrial findings during prosthetic hip replacement. Am J Cardiol 1994; 73:823-4. [PMID: 8160624 DOI: 10.1016/0002-9149(94)90889-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J L Rodrigo
- Department of Cardiopulmonary Surgery, Hospital Universitario San Carlos, Madrid, Spain
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50
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Pollok KE, Kim YJ, Hurtado J, Zhou Z, Kim KK, Kwon BS. 4-1BB T-cell antigen binds to mature B cells and macrophages, and costimulates anti-mu-primed splenic B cells. Eur J Immunol 1994; 24:367-74. [PMID: 8299685 DOI: 10.1002/eji.1830240215] [Citation(s) in RCA: 166] [Impact Index Per Article: 5.5] [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: 01/29/2023]
Abstract
4-1BB is expressed on activated murine T cells and may function as an accessory signaling molecule during T-cell activation. To identify putative 4-1BB ligands, a fusion protein consisting of the extracellular domain of 4-1BB fused to human placental alkaline phosphatase (4-1BB-AP) was constructed. Alkaline phosphatase activity could then be used as an indicator of the relative amount of bound 4-1BB. These studies indicated that 4-1BB-AP specifically bound to the surface of various mature B and macrophage cell lines. 4-1BB-AP bound at low levels to T cell lines (non-activated and anti-CD3-activated), pre-B-cell lines, and an immature macrophage cell line. 4-1BB-AP did not bind to a glial tumor cell line, HeLa cells, or COS cells. In addition, 4-1BB-AP bound at higher levels to F(ab')2 anti-mu-activated primary B cells compared to anti-CD3-activated primary T cells. Scatchard analysis indicated that the A20 B cell lymphoma expressed 3680 binding sites per cell with a Kd of 1.86 nM. Affinity cross-linking studies demonstrated that a major cell surface species of 120 kDa bound to 4-1BB-AP; 4-1BB-AP also bound to a minor species of approximately 60 kDa. The addition of paraformaldehyde-fixed SF21 cells expressing recombinant 4-1BB synergized with F(ab')2 anti-mu in inducing splenic B cell proliferation suggesting that 4-1BB may function as a regulator of B cell growth.
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Affiliation(s)
- K E Pollok
- Indiana University School of Medicine, Indianapolis 46202
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