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Monroy Y, García MA, Deladino L, Rivero S. Valorization of a by-product of the yerba mate industry by assembling with cassava starch adhesive for packaging material production. Int J Biol Macromol 2024; 266:131271. [PMID: 38556239 DOI: 10.1016/j.ijbiomac.2024.131271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 03/14/2024] [Accepted: 03/28/2024] [Indexed: 04/02/2024]
Abstract
Yerba mate industrial processing produces tons of powder as a by-product, this yerba mate powder (YMP) is an excellent source of biomass to develop biodegradable materials. Cassava starch modified with 1,2,3,4-butane tetracarboxylic acid (BA) in the presence of sodium propionate as a catalyst is an eco-friendly option to obtain bioadhesives. This work aimed to develop sustainable laminates from starch-based adhesives and yerba mate powder and to study their physico-chemical, structural, and mechanical properties. Blends of bioadhesive and YMP were prepared (1:1, adhesive:YMP). Monolayer materials were obtained by thermo-compression and later assembled with adhesive to obtain bilayer laminates. Bioadhesive was able to bind the yerba mate by-product fibers, as evidenced by SEM microstructure analysis, the interactions of adhesive:substrate were elucidated by ATR-FTIR and supported by chemometrics analysis. The incorporation of the catalyst decreased the rugosity of materials and their mechanical performance was improved by the action of both acid concentration and catalyst presence, requiring higher energy for puncture. Thus, it was feasible to obtain mono and bilayer laminates as an eco-compatible alternative for the design of sustainable tray-like materials based on the industrial by-product of yerba mate.
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Affiliation(s)
- Y Monroy
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina
| | - M A García
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina; Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Argentina
| | - L Deladino
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina; Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Argentina
| | - S Rivero
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina; Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Argentina.
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Ornella S, García L, Cosentino M, Taylor MF, Ciappa M, García MA. Results and prognosis of kidney transplantation in lupus nephritis: Experience of an Argentine center. Lupus 2024:9612033241244508. [PMID: 38569651 DOI: 10.1177/09612033241244508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
INTRODUCTION Although RT has improved the survival of the population with ESRD due to all causes, renal outcomes in SLE are controversial. The objective of this study is to describe the characteristics and evolution of the patients and the kidney transplant in LN, and compare it with patients transplanted for other causes. MATERIALS AND METHODS Retrospective, observational, analytical, single-center study in which records of patients undergoing nephrotransplantation for LN were analyzed. They were compared with a group of patients transplanted at the same center for other causes of ESRD. RESULTS 41 patients with kidney transplant due to SLE and 89 transplanted due to other causes of ESRD were registered. Graft loss occurred in 12 (29.26%) patients with LN and 34 (38.2%) patients in the comparison group (p = .428). Only one case (4.8%) presented reactivation of the LN in the graft, without graft loss. Median graft survival was 73.1 months in the LN group and 66.3 months in the comparison group (p = .221). A total of 8 (19.5%) patients with LN and 11 (12.4%) without LN died (p = .42), with infections being the main cause in both groups. There were no statistically significant differences between groups in graft and patient survival. In a sub-analysis of 28 patients with LN with aPL study, 4 thrombotic events were observed, in 3 different patients, in the aPL-positive group. There were no statistically significant differences in terms of causes of graft loss and graft survival (positive aFL 75.7 months vs negative aFL 72.7 months, p= .96). There were also no differences in mortality between the groups (p = .61). CONCLUSION Patients transplanted for LN did not differ from the control population in terms of graft and patient survival. Infections were the main cause of death, so prophylaxis and vaccination continue to be a fundamental pillar in the prevention of infections in immunocompromised patients.
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Affiliation(s)
- Sofía Ornella
- Servicio de Reumatologia, Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Lucila García
- Servicio de Reumatologia, Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Máximo Cosentino
- Servicio de Reumatologia, Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Marcelo F Taylor
- Unidad de Trasplante Renal del Centro Regional de Ablación e Implante (CRAI SUR), Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Martín Ciappa
- Unidad de Trasplante Renal del Centro Regional de Ablación e Implante (CRAI SUR), Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Mercedes A García
- Servicio de Reumatologia, Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
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Nieto R, Quintana R, Zavala-Flores E, Serrano R, Roberts K, Catoggio LJ, García MA, Berbotto GA, Saurit V, Bonfa E, Borba EF, Lavras Costallat LT, Da Silva NA, Sato EI, Tavares Brenol JC, Massardo L, Neira OJ, Vázquez G, Guibert Toledano M, Pascual-Ramos V, Sauza Del Pozo MJ, Barile-Fabris LA, Amigo MC, García De La Torre I, Acevedo-Vásquez EM, Segami MI, Chacón-Díaz R, Esteva-Spinetti MH, Alarcón GS, Pons-Estel BA, Pons-Estel GJ. Time to diagnosis in systemic lupus erythematosus: Associated factors and its impact on damage accrual and mortality. Data from a multi-ethnic, multinational Latin American lupus cohort. Lupus 2024; 33:340-346. [PMID: 38334100 DOI: 10.1177/09612033241232821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
BACKGROUND Systemic lupus erythematosus (SLE) often mimics symptoms of other diseases, and the interval between symptom onset and diagnosis may be long in some of these patients. Aims: To describe the characteristics associated with the time to SLE diagnosis and its impact on damage accrual and mortality in patients with SLE from a Latin American inception cohort. METHODS Patients were from a multi-ethnic, multi-national Latin-American SLE inception cohort. All participating centers had specialized lupus clinics. Socio-demographic, clinical/laboratory, disease activity, damage, and mortality between those with a longer and a shorter time to diagnosis were compared using descriptive statistical tests. Multivariable Cox regression models with damage accrual and mortality as the end points were performed, adjusting for age at SLE diagnosis, gender, ethnicity, level of education, and highest dose of prednisone for damage accrual, plus highest dose of prednisone, baseline SLEDAI, and baseline SDI for mortality. RESULTS Of the 1437 included in these analyses, the median time to diagnosis was 6.0 months (Q1-Q3 2.4-16.2); in 721 (50.2%) the time to diagnosis was longer than 6 months. Patients whose diagnosis took longer than 6 months were more frequently female, older at diagnosis, of Mestizo ethnicity, not having medical insurance, and having "non-classic" SLE symptoms. Longer time to diagnosis had no impact on either damage accrual (HR 1.09, 95% CI 0.93-1.28, p = 0.300) or mortality (HR 1.37, 95% CI 0.88-2.12, p = 0.200). CONCLUSIONS In this inception cohort, a maximum time of 24 months with a median of 6 months to SLE diagnosis had no apparent negative impact on disease outcomes (damage accrual and mortality).
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Affiliation(s)
- Romina Nieto
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Rosana Quintana
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | | | - Rosa Serrano
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Karen Roberts
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Luis J Catoggio
- Rheumatology Section, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Mercedes A García
- Servicio de Reumatología, HIGA San Martin de La Plata, Buenos Aires, Argentina
| | - Guillermo A Berbotto
- Servicio de Reumatología, Hospital Escuela "Eva Perón", Granadero Baigorria, Argentina
| | - Verónica Saurit
- Servicio de Reumatología, Hospital Privado Universitario de Córdoba, Córdoba, Argentina
| | - Eloisa Bonfa
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Eduardo F Borba
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | | | - Nilzio A Da Silva
- Servico de Reumatologia, Departamento de Clinica Medica, Faculdade de Medicina, Hospital das Clínicas,Universidade Federal de Goiás, Goiania, Brazil
| | - Emilia I Sato
- Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - Joao C Tavares Brenol
- Rheumatology Division, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Loreto Massardo
- Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago de Chile, Chile
| | - Oscar J Neira
- Sección de Reumatología, Hospital del Salvador, Universidad de Chile, Unidad de Reumatología, Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Gloria Vázquez
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, Hospital Universitario, Fundación San Vicente, Medellín, Colombia
| | - Marlene Guibert Toledano
- Servicio Nacional de Reumatología, Centro de Investigaciones Médico Quirúrgicas (CIMEQ), La Habana, Cuba
| | - Virginia Pascual-Ramos
- Virginia Pascual-Ramos, Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México DF, México
| | - María J Sauza Del Pozo
- Maria Josefina Sauza del Pozo, Laura E. Aranda Baca, and Adelfia Urenda Quezada, Servicio de Reumatología, Insti- tuto Mexicano de Seguro Social, Hospital de Especialidades No 25, Monterrey, México
| | | | | | - Ignacio García De La Torre
- Departamento de Inmunología y Reumatología, Hospital General de Occidente de la S.S. y Universidad de Guadalajara, Zapopan, Jalisco, México
| | | | - María I Segami
- Servicio de Reumatología, Hospital General Guillermo Almenara Irigoyen, EsSalud, Lima, Peru
| | - Rosa Chacón-Díaz
- Servicio de Reumatología, Policlínica Méndez Gimón, Caracas, Venezuela
| | - María H Esteva-Spinetti
- Servicio de Reumatología, Departamento de Medicina, Hospital Central de San Cristóbal, San Cristóbal, Venezuela
| | - Graciela S Alarcón
- Universidad Peruana Cayetano Heredia, Lima, Perú
- The University of Alabama at Birmingham Marnix E. Heersink School of Medicine, Birmingham, AL, USA
| | - Bernardo A Pons-Estel
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
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Díez MC, Przyborski S, Del Cerro A, Alonso-Guervós M, Iglesias-Cabo T, Carrocera S, García MA, Fernández M, Alonso L, Muñoz M. Generation of a novel three-dimensional scaffold-based model of the bovine endometrium. Vet Res Commun 2023; 47:1721-1733. [PMID: 37154859 PMCID: PMC10484811 DOI: 10.1007/s11259-023-10130-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 04/20/2023] [Indexed: 05/10/2023]
Abstract
Bovine in vitro endometrial models that resemble tissue function in vivo are needed to study infertility, long-term uterine alterations induced by pathogens and impact of endocrine disruptor chemicals on reproductive function and other reproductive system complications that cause high economic losses in livestock species. The present study aimed to generate an innovative, reproducible, and functional 3D scaffold-based model of the bovine endometrium structurally robust for long term-culture. We developed a multicellular model containing both endometrial epithelial and stromal cells. Epithelial cells organized to form a luminal-like epithelial layer on the surface of the scaffold. Stromal cells produced their own extracellular matrix forming a stable subepithelial compartment that physiologically resembles the normal endometrium. Both cell types released prostaglandin E2 and prostaglandin F2α following a treatment with oxytocin and arachidonic acid. Additionally signal pathways mediating oxytocin and arachidonic acid stimulation of prostaglandin synthesis were analyzed by real time PCR (RT-PCR). Oxytocin receptor (OXTR), prostaglandin E2 receptor 2 (EP2), prostaglandin E2 receptor 4 (EP4), prostaglandin F receptor (PTGFR), prostaglandin E synthase (PTGES), PGF-synthase (PGFS) and prostaglandin-endoperoxide synthase 2 (COX-2) expression was detected in both control and treatment groups, however, only significant changes in abundance of OXTR mRNA transcripts were found. The results obtained by this study are a step forward in bovine in vitro culture technology. This 3D scaffold-based model provides a platform to study regulatory mechanisms involved in endometrial physiology and can set the basis for a broader tool for designing and testing novel therapeutic strategies for recurrent uterine pathologies.
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Affiliation(s)
- M C Díez
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Genética y Reproducción Animal. Camino de Rioseco, Deva Gijón, 1225 - 33394, Asturias, Spain
| | - S Przyborski
- Department of Bioscience, Durham University, Durham, DH1 3LE, UK
| | - A Del Cerro
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Genética y Reproducción Animal. Camino de Rioseco, Deva Gijón, 1225 - 33394, Asturias, Spain
| | - M Alonso-Guervós
- Optical Microscopy and Image Processing Unit, Scientific-Technical Services, University of Oviedo, Asturias, Spain
| | - T Iglesias-Cabo
- Scientific-Technical Services, Statistical Consulting Unit, University of Oviedo, Asturias, Spain
| | - S Carrocera
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Genética y Reproducción Animal. Camino de Rioseco, Deva Gijón, 1225 - 33394, Asturias, Spain
| | - M A García
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Genética y Reproducción Animal. Camino de Rioseco, Deva Gijón, 1225 - 33394, Asturias, Spain
| | - M Fernández
- Asociación. Española de Criadores de Ganado Vacuno Selecto Raza Asturiana de los Valles, Asturias, Spain
| | - L Alonso
- Matadero Central de Asturias, Asturias, Spain
| | - M Muñoz
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Genética y Reproducción Animal. Camino de Rioseco, Deva Gijón, 1225 - 33394, Asturias, Spain.
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González LA, Alarcón GS, Harvey GB, Quintana R, Pons-Estel GJ, Ugarte-Gil MF, Vásquez G, Catoggio LJ, García MA, Borba EF, Da Silva NA, Tavares Brenol JC, Toledano MG, Massardo L, Neira O, Pascual-Ramos V, Amigo MC, Barile-Fabris LA, De La Torre IG, Alfaro-Lozano J, Segami MI, Chacón-Díaz R, Esteva-Spinetti MH, Iglesias-Gamarra A, Pons-Estel BA. Predictors of severe hemolytic anemia and its impact on major outcomes in systemic lupus erythematosus: Data from a multiethnic Latin American cohort. Lupus 2023; 32:658-667. [PMID: 36916674 DOI: 10.1177/09612033231163745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
OBJECTIVE To determine the predictors of the occurrence of severe autoimmune hemolytic anemia (AIHA) and its impact on damage accrual and mortality in SLE patients. METHODS Factors associated with time to severe AIHA (hemoglobin level ≤7 g/dL) occurring from the onset of SLE symptoms were examined by Cox proportional hazards regressions. The association of severe AIHA with mortality was examined by logistic regression analyses while its impact on damage was by negative binomial regression. RESULTS Of 1,349 patients, 49 (3.6%) developed severe AIHA over a mean (SD) follow-up time of 5.4 (3.8) years. The median time from the first clinical manifestation to severe AIHA was 111 days (IQR 43-450). By multivariable analysis, male sex (HR 2.26, 95% CI 1.02-4.75, p = 0.044), and higher disease activity at diagnosis (HR 1.04, 95% CI 1.01-1.08, p = 0.025) were associated with a shorter time to severe AIHA occurrence. Of the SLEDAI descriptors, only hematologic (leukopenia and/or thrombocytopenia) showed a certain trend toward significance in the multivariable analysis (HR 2.36, 95% CI 0.91-6.13, p = 0.0772). Severe AIHA contributed neither to damage nor to mortality. CONCLUSIONS Severe AIHA occurs during the early course of SLE. Male sex and higher disease activity at diagnosis emerged as independent predictors of a shorter time to severe AIHA occurrence. Although not statistically significant, hematological abnormalities at SLE diagnosis could predict the occurrence of severe AIHA in a shorter time. Damage and mortality did not seem to be impacted by the occurrence of severe AIHA.
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Affiliation(s)
- Luis Alonso González
- División de Reumatología, Departamento de Medicina Interna, Facultad de Medicina, 27983Universidad de Antioquia, Medellin, Colombia
| | - Graciela S Alarcón
- Division of Clinical Immunology and Rheumatology, Department of Medicine, Marnix E. Heersink School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA.,Department of Medicine, School of Medicine, Universidad Peruana Cayetano, Heredia, Lima, Perú
| | - Guillermina B Harvey
- Escuela de Estadística, Facultad de Ciencias Económicas y Estadística, 488296Universidad Nacional de Rosario, Rosario, Argentina
| | - Rosana Quintana
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Guillermo J Pons-Estel
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Manuel F Ugarte-Gil
- Rheumatology Department, Hospital Nacional Guillermo Almenara Irigoyen, Lima, Perú.,Grupo Peruano de Estudio de Enfermedades Autoinmunes Sistémicas, Universidad Científica del Sur, Lima, Perú
| | - Gloria Vásquez
- División de Reumatología, Departamento de Medicina Interna, Facultad de Medicina, 27983Universidad de Antioquia, Medellin, Colombia
| | - Luis J Catoggio
- Rheumatology Section, 37533Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Mercedes A García
- Servicio de Reumatología, 37533HIGA San Martin de La Plata, Buenos Aires, Argentina
| | - Eduardo F Borba
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Nilzio A Da Silva
- Rheumatology Unit, Faculdade de Medicina da Universidad e Federal de Goias, Goiania, Brazil
| | - João C Tavares Brenol
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,28124Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marlene Guibert Toledano
- Servicio Nacional de Reumatología, Centro de Investigaciones Médico Quirúrgicas (CIMEQ), La Habana, Cuba
| | - Loreto Massardo
- Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, 373328Universidad San Sebastián, Santiago de Chile, Chile
| | - Oscar Neira
- Sección de Reumatología, 476601Hospital del Salvador, Universidad de Chile, Santiago, Chile
| | - Virginia Pascual-Ramos
- Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Ciudad de México, México
| | | | | | - Ignacio García De La Torre
- Departamento de Inmunología y Reumatología, 37758Hospital General de Occidentede la S.S. y Universidad de Guadalajara, Zapopan, Jalisco, México
| | - José Alfaro-Lozano
- Rheumatology Department, Hospital Nacional Guillermo Almenara Irigoyen, Lima, Perú
| | - María I Segami
- Hospital Nacional "Edgardo Rebagliati Martins", Essalud, Lima, Perú
| | - Rosa Chacón-Díaz
- Centro Nacional de Enfermedades Reumáticas, 198370Hospital Universitario de Caracas, Caracas, Venezuela
| | - María H Esteva-Spinetti
- Servicio de Reumatología, Departamento de Medicina, Hospital Central de San Cristóbal, San Cristóbal, Venezuela
| | - Antonio Iglesias-Gamarra
- Unidad de Reumatología, Departamento de Medicina Interna, 28021Universidad Nacional de Colombia, Bogotá, Colombia
| | - Bernardo A Pons-Estel
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
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García MA, Alba P, Del Campo-Perez V, Roverano S, Quintana RM, Alvarez AP, Graf CE, Pisoni C, Spindler A, Gomez C, Figueredo HM, Papasidero S, Paniego R, de la Vega MC, Civit E, Gonzalez Lucero L, Martire MV, Aguila Maldonado R, Gordon S, Gobbi C, Micelli M, Nieto R, Rausch G, Gongora V, Damico A, Dubinsky D, Orden A, Zacariaz J, Romero J, Pera M, Goñi M, Rillo O, Baez R, Arturi V, Gonzalez A, Vivero F, Bedoya ME, Shmid MM, Caputo V, Larroude MS, Dominguez N, Gómez GN, Rodriguez GN, Marin J, Collado V, Jorfen M, Bedran Z, Curti A, Gazzoni MV, Sarano J, Zelaya M, Sacnun M, Finucci Curi P, Rojas Tessel R, Arias Saavedra M, Sattler ME, Machado Escobar MA, Astesana P, Paris U, Virasoro BM, Santa Cruz MJ, Allievi A, Vandale JM, Hojberg NG, Pons-Estel B. Multicenter lupus register from Argentina, the RELESSAR database: Influence of ethnicity on disease phenotype. Lupus 2022; 31:637-645. [PMID: 35382633 DOI: 10.1177/09612033221083267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The objective is to describe the main characteristics of patients with systemic lupus erythematosus (SLE) in Argentina and to examine the influence of ethnicity on the expression of the disease. PATIENTS AND METHODS RELESSAR is a multicentre register carried out by 106 researchers from 67 rheumatologic Argentine centres. It is a cross-sectional study of SLE (1982/1997 ACR) patients. RELESSAR electronic database includes demographic, cumulative SLE manifestations, SELENA-SLEDAI, SLICC-SDI, Katz's severity and Charlson's comorbidity indexes and treatment patterns. RESULTS We included 1,610 patients, 91.7% were female with a median age at diagnosis of 28.1 ± 12.8; 96.2% met ≥4 ACR 1982/97 criteria. Frequent manifestations were arthritis (83.5%), malar rash (79.5%), photosensitivity (75.3%), haematological (63.8%) and renal disease (47.4%), antinuclear antibodies (96%), anti-dsDNA (66.5%) and anti-Smith antibodies (29%). The mean Selena-SLEDAI score at last visit was 3.18 (SD 4.3) and mean SDI was 1 (SD 1.3). The accumulated treatments most frequently used were antimalarials (90.4%), corticosteroids (90%), azathioprine (31.8%), intravenous cyclophosphamide (30.2%), mycophenolate mofetil or mycophenolic acid (24.5%), methotrexate (19.3%), belimumab 5.3% and rituximab 5.1%. Refractory lupus was diagnosed in 9.3% of the cases. The main causes of death were lupus activity (25.0%), activity and concomitant infections (25.0%), infections (18.2%), vascular disease (13.6%) and cancer (4.5%). Mortality was associated with higher SLEDAI, Katz, damage indexes and comorbidities. Of the 1610 patients included, 44.6% were Caucasian, 44.5% Mestizo, 8.1% Amerindian and 1.2% Afro-Latin American. Mestizo patients had higher male representation, low socioeconomic status, more inadequate medical coverage, fewer formal years of education and shorter disease duration. Polyadenopathies and Raynaud's phenomenon were more frequent in Caucasians. In the logistic regression analysis higher damage index (OR 1.28, CI 95% 1.02-1.61, p = 0.03) remained associated to mestizo ethnicity. CONCLUSIONS This study represents the largest number of adult patients with SLE studied in Argentina. Caucasian patients were differentiated by having Raynaud's phenomenon and polyadenopathy more frequently, while patients of Mestizo origin had higher damage indexes.
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Affiliation(s)
| | | | - Victor Del Campo-Perez
- Servicio de Medicina Preventiva y Epidemiología, 96682Complexo Hospitalario Universitario de Vigo, Vigo, España
| | | | - Rosana M Quintana
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (CREAR), Rosario, Argentina
| | | | | | | | | | | | - Heber M Figueredo
- Hospital de Alta Complejidad Pte. Juan Domingo Perón, Formosa, Argentina
| | - Silvia Papasidero
- Hospital General de Agudos Dr. Enrique Tornú580023, Buenos Aires, Argentina
| | | | | | - Emma Civit
- Hospital del Carmen, Godoy Cruz, Argentina
| | | | | | | | | | | | - Marina Micelli
- 541318Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | - Romina Nieto
- Hospital Provincial de Rosario, Rosario, Argentina
| | | | | | | | | | - Alberto Orden
- Hospital Aeronáutico Central, 433287 Buenos Aires, Argentina
| | - Johana Zacariaz
- Hospital Italiano de Buenos Aires, 37533 Buenos Aires, Argentina
| | | | - Mariana Pera
- 198367HIGA General San Martin, La Plata, Argentina
| | - Mario Goñi
- Centro de Especialidades Médicas Ambulatorias de Rosario, Rosario, Argentina
| | - Oscar Rillo
- 58783Hospital General de Agudos Dr Ignacio Pirovano, Buenos Aires, Argentina
| | - Roberto Baez
- Hospital De General Roca, General Roca, Argentina
| | | | | | | | | | - Maria M Shmid
- Hospital Angela Iglesia de Llano, Corrientes, Argentina
| | | | | | - Nadia Dominguez
- 541318Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | - Graciela N Gómez
- Instituto de Investigaciones Médicas Alfredo Lanari, 207909 Buenos Aires, Argentina
| | | | - Josefina Marin
- Hospital Italiano de Buenos Aires, 37533 Buenos Aires, Argentina
| | - Victoria Collado
- Instituto de Investigaciones Médicas Alfredo Lanari, 207909 Buenos Aires, Argentina
| | - Marisa Jorfen
- Centro de Especialidades Médicas Ambulatorias, Rosario, Argentina
| | - Zaida Bedran
- Hospital Escuela de Agudos Dr. Ramón Madariaga, Posadas, Argentina
| | - Ana Curti
- Hospital Luis Carlos Lagomaggiore, 297830 Mendoza, Argentina
| | | | - Judith Sarano
- Instituto de Investigaciones Médicas Alfredo Lanari, 207909 Buenos Aires, Argentina
| | - Marcos Zelaya
- 541318Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | - Monica Sacnun
- Hospital Provincial del Centenario, 541448 Rosario, Argentina
| | | | | | - Maira Arias Saavedra
- 541318Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
| | | | | | | | - Ursula Paris
- Hospital Escuela de Agudos Dr. Ramón Madariaga, Posadas, Argentina
| | | | - Maria J Santa Cruz
- Hospital General de Agudos Dr. Enrique Tornú580023, Buenos Aires, Argentina
| | - Alberto Allievi
- 28213Universidad del Salvador, Autoinmunidad, Buenos Aires, Argentina
| | - Juan M Vandale
- Hospital Privado de la Comunidad, Mar del Plata, Argentina
| | - Noelia G Hojberg
- 541318Hospital General de Agudos José María Ramos Mejía, Buenos Aires, Argentina
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7
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Greño M, Amariei G, Boltes K, Castro-Puyana M, García MA, Marina ML. Ecotoxicity evaluation of tetramethrin and analysis in agrochemical formulations using chiral electrokinetic chromatography. Sci Total Environ 2021; 800:149496. [PMID: 34388647 DOI: 10.1016/j.scitotenv.2021.149496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 08/02/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
The separation of the four isomers of tetramethrin was performed for the first time using a cyclodextrin-micellar electrokinetic chromatography methodology. Using sodium deoxycholate and 2-hydroxypropyl-β-CD as chiral selectors, tetramethrin isomers were separated with resolution values of 1.7 and 1.1 for trans- and cis-isomers, respectively, in analysis times lower than 12.5 min. Once developed and optimized, the analytical method was applied to the analysis of an antiparasitic commercial formulation and to the evaluation of the stability and ecotoxicity of tetramethrin. Using measured concentrations, the stability was assessed at enantiomeric level and the ecotoxicological parameters on Daphnia magna were determined. Tetramethrin presents toxicity on aquatic microinvertebrates, with EC50 (t = 72 h) of 1.8 mg/L. The acute toxicity of tetrametrin was attributed to the trans-1 enantiomer. The first evidence of oxidative stress-mediated mode of action for tetramethrin on Daphnia magna is reported in the present work.
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Affiliation(s)
- M Greño
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - G Amariei
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - K Boltes
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain; Madrid Institute for Advanced Studies of Water (IMDEA Agua), Parque Científico Tecnológico, E-28805 Alcalá de Henares, Madrid, Spain
| | - M Castro-Puyana
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain; Universidad de Alcalá, Instituto de Investigación Química Andrés M. del Río, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - M A García
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain; Universidad de Alcalá, Instituto de Investigación Química Andrés M. del Río, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - M L Marina
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain; Universidad de Alcalá, Instituto de Investigación Química Andrés M. del Río, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain.
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8
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Reátegui-Sokolova C, Ugarte-Gil MF, Harvey GB, Wojdyla D, Pons-Estel GJ, Quintana R, Serrano-Morales RM, Sacnun MP, Catoggio LJ, Soriano ER, García MA, Saurit V, Alvarellos A, Caeiro F, Berbotto GA, Sato EI, Borba Neto EF, Bonfa E, de Oliveira E Silva Montandon AC, Da Silva NA, Cavalcanti F, Vásquez G, Guibert-Toledano M, Reyes-Llerena GA, Massardo L, Neira OJ, Cardiel MH, Barile-Fabris LA, Amigo MC, Silveira LH, Portela-Hernández M, Garcia de la Torre I, Segami MI, Chacón-Diaz R, Esteva-Spinetti MH, Alarcón GS, Pons-Estel BA. Predictors of renal damage in systemic lupus erythematous patients: data from a multiethnic, multinational Latin American lupus cohort (GLADEL). RMD Open 2021; 6:rmdopen-2020-001299. [PMID: 33310863 PMCID: PMC7859505 DOI: 10.1136/rmdopen-2020-001299] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 05/01/2020] [Revised: 07/16/2020] [Accepted: 10/21/2020] [Indexed: 11/24/2022] Open
Abstract
Aim A decrease in proteinuria has been considered protective from renal damage in lupus nephritis (LN), but a cut-off point has yet to be established. The aim of this study was to identify the predictors of renal damage in patients with LN and to determine the best cut-off point for a decrease in proteinuria. Methods We included patients with LN defined clinically or histologically. Possible predictors of renal damage at the time of LN diagnosis were examined: proteinuria, low complement, anti-double-stranded DNA antibodies, red cell casts, creatinine level, hypertension, renal activity (assessed by the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI)), prednisone dose, immunosuppressive drugs and antimalarial use. Sociodemographic variables were included at baseline. Proteinuria was assessed at baseline and at 12 months, to determine if early response (proteinuria <0.8 g/day within 12 months since LN diagnosis) is protective of renal damage occurrence. Renal damage was defined as an increase of one or more points in the renal domain of The Systemic Lupus International Collaborating Clinics (SLICC)/American College of Rheumatology (ACR) Damage Index (SDI). Cox regression models using a backward selection method were performed. Results Five hundred and two patients with systemic lupus erythematosus patients were included; 120 patients (23.9%) accrued renal damage during their follow-up. Early response to treatment (HR=0.58), antimalarial use (HR=0.54) and a high SES (HR=0.25) were protective of renal damage occurrence, whereas male gender (HR=1.83), hypertension (HR=1.86) and the renal component of the SLEDAI (HR=2.02) were risk factors for its occurrence. Conclusions Early response, antimalarial use and high SES were protective of renal damage, while male gender, hypertension and higher renal activity were risk factors for its occurrence in patients with LN.
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Affiliation(s)
- Cristina Reátegui-Sokolova
- Rheumatology, Hospital Nacional Guillermo Almenara Irigoyen, EsSalud, Lima, Perú .,Unidad de Investigación para la Generación y Síntesis de Evidencias en Salud, Universidad San Ignacio de Loyola, Lima, Perú
| | - Manuel F Ugarte-Gil
- Rheumatology, Hospital Nacional Guillermo Almenara Irigoyen, EsSalud, Lima, Perú.,Universidad Científica del Sur, Lima, Perú
| | - Guillermina B Harvey
- Escuela de Estadística, Facultad de Ciencias Económicas y Estadística, Universidad Nacional de Rosario, Rosario, Argentina
| | | | | | - Rosana Quintana
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | | | | | | | | | - Mercedes A García
- Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | - Verónica Saurit
- Hospital Privado, Centro Médico de Córdoba, Córdoba, Argentina
| | | | | | | | - Emilia I Sato
- Universidade Federal da Sao Paulo (UNIFESP), Sao Paulo, Brasil
| | | | - Eloisa Bonfa
- Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brasil
| | | | - Nilzio A Da Silva
- Faculdade de Medicina, Universidade Federal de Goias, Goiânia, Brasil
| | - Fernando Cavalcanti
- Servico de Reumatologia, Hospital das Clínicas da Universidade Federal de Pernambuco (HC-UFPE), Recife, Brasil
| | - Gloria Vásquez
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, Medellín, Colombia
| | | | | | - Loreto Massardo
- Facultad de Medicina, Universidad San Sebastián, Santiago, Chile
| | - Oscar J Neira
- Hospital del Salvador, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mario H Cardiel
- Centro de Investigación Clínica de Morelia SC, Morelia, Mexico
| | | | | | - Luis H Silveira
- Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Margarita Portela-Hernández
- Departamento de Reumatología, Hospital de Especialidades CMN SXXI, Instituto Mexicano de Seguridad Social, Ciudad de México, Mexico
| | | | | | - Rosa Chacón-Diaz
- Centro Nacional de Enfermedades Reumáticas, Hospital Universitario de Caracas, Caracas, Venezuela
| | | | - Graciela S Alarcón
- The University of Alabama at Birmingham, Birmingham, Alabama, Alabama, USA.,Universidad Peruana Cayetano Heredia, Lima, Perú
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9
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Gómez GN, Pérez N, Braillard Poccard A, Gómez RA, Costi AC, García MA, Viola M, Benitez A, Aciar MM, Crespo Espíndola M, Yucra D, Cosatti MA, Pisoni C, Capelusnik D, Lojo MN, Barrios BI, Rivero M, Kisluk B, Granel A. Myositis-specific antibodies and clinical characteristics in patients with autoimmune inflammatory myopathies: reported by the Argentine Registry of Inflammatory Myopathies of the Argentine Society of Rheumatology. Clin Rheumatol 2021; 40:4473-4483. [PMID: 34159491 DOI: 10.1007/s10067-021-05797-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/04/2021] [Accepted: 05/25/2021] [Indexed: 12/19/2022]
Abstract
INTRODUCTION/OBJECTIVES To describe clinical features in patients with inflammatory myopathies (IMs) from the Argentine Registry of Inflammatory Myopathies, and their relationship with myositis-specific antibodies (MSAs). METHODS This cross-sectional study included 360 adult patients with dermatomyositis (DM), polymyositis (PM), and inclusion body myositis. Demographics, clinical, and serological characteristics were retrospectively recorded (2016-2019). MSAs were determined by immunoblotting. Patients who were positive for anti-Jo-1, Mi-2, and MDA5 were compared against a group of patients, taken as reference group, who were negative for all MSAs. RESULTS Women 72%, median age at diagnosis was 47.3 years (18-82). The most frequent subtypes were DM (43.9%) followed by PM (30%).The most frequent MSAs were anti-Jo-1 (51/317), 16.1%; MDA5 (12/111), 10.8%, and Mi-2 (23/226), 10.2%. Anti-Jo-1 was associated (p < 0.05) with a higher frequency of chronic disease course, interstitial lung disease (ILD), arthritis, and mechanic's hands. Anti-Mi-2 was found in patients who had higher frequency of skin manifestations and higher CK values (p < 0.001). Patients with anti-MDA5 had normal or low CK levels. Anti-MDA5 was associated (p < 0.05) with skin manifestations, arthritis, and ILD. The rest of MSAs had frequencies lower than 8%. Anti-TIF1ϒ was found in eight DM patients and one had cancer. Anti-SRP was found in seven patients who had PM and elevated CK. CONCLUSION Anti-Jo-1 was the most frequent MSA, and was associated with ILD; MDA5 was associated with CADM and ILD, and Mi-2, with classical DM. Despite the different prevalence with respect to other cohorts, the clinical characteristics for each MSA group were similar to the data reported in other studies. Key Points • This study describes the prevalence of MSAs in the Argentine Registry of IMs. • Anti-Jo-1 and anti-MDA5 were associated with ILD. • Anti-Mi-2 was the third most frequent MSA, associated with classical DM.
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Affiliation(s)
- Graciela N Gómez
- Department of Immunology, Instituto de Investigaciones Médicas Alfredo Lanari, Buenos Aires University, Autonomous City of Buenos Aires, 3150 Combatientes de Malvinas Ave, 1431, PC, Argentina.
| | - Nicolás Pérez
- Department of Immunology, Instituto de Investigaciones Médicas Alfredo Lanari, Buenos Aires University, Autonomous City of Buenos Aires, 3150 Combatientes de Malvinas Ave, 1431, PC, Argentina
| | - Andrea Braillard Poccard
- Department of Rheumatology, Hospital de Clínicas, José de San Martín, Buenos Aires University, Autonomous City of Buenos Aires, Argentina
| | - Ramiro A Gómez
- Department of Rheumatology, Hospital de Clínicas, José de San Martín, Buenos Aires University, Autonomous City of Buenos Aires, Argentina
| | - Ana C Costi
- Department of Rheumatology, Province of Buenos Aires, H.I.G.A San Martín, La Plata City, Argentina
| | - Mercedes A García
- Department of Rheumatology, Province of Buenos Aires, H.I.G.A San Martín, La Plata City, Argentina
| | - Malena Viola
- Department of Rheumatology, Hospital General de Agudos Dr. Cosme Argerich, Autonomous City of Buenos Aires, Argentina
| | - Alejandro Benitez
- Department of Rheumatology, Hospital General de Agudos Dr. Cosme Argerich, Autonomous City of Buenos Aires, Argentina
| | - Mariana M Aciar
- Department of Rheumatology, Hospital Nuestro Señor del Milagro, Salta City, Province of Salta, Argentina
| | - María Crespo Espíndola
- Department of Rheumatology, Hospital Nuestro Señor del Milagro, Salta City, Province of Salta, Argentina
| | - Demelza Yucra
- Department of Rheumatology, Sanatorio Güemes, Autonomous City of Buenos Aires, Argentina
| | - Micaela A Cosatti
- Department of Rheumatology, CEMIC, Autonomous City of Buenos Aires, Argentina
| | - Cecilia Pisoni
- Department of Rheumatology, CEMIC, Autonomous City of Buenos Aires, Argentina
| | - Dafne Capelusnik
- Department of Rheumatology, Instituto de Rehabilitación Psicofsica (IREP), Autonomous City of Buenos Aires, Argentina
| | - María N Lojo
- Department of Rheumatology, Hospital Rossi, La Plata City, Province of Buenos Aires, Argentina
| | - Belen I Barrios
- Department of Rheumatology, Hospital Enrique Tornú, Autonomous City of Buenos Aires, Argentina
| | - Mariano Rivero
- Department of Rheumatology, British Hospital, Autonomous City of Buenos Aires, Argentina
| | - Boris Kisluk
- Department of Rheumatology, Hospital Eva Perón, Granadero Baigorria City, Province of Santa Fe, Argentina
| | - Amelia Granel
- Department of Rheumatology, Hospital San Roque, La Plata City, Province of Buenos Aires, Argentina
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10
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Barile-Fabris LA, Fragoso-Loyo H, Wojdyla D, Quintana R, Pons-Estel GJ, Catoggio LJ, García MA, Saurit V, Drenkard C, Bonfa E, Borba EF, Sato E, Tavares Brenol JC, Cavalcanti F, Da Silva NA, Lavras Costallat LT, Guibert Toledano M, Massardo L, Neira O, Cardiel MH, Amigo MC, García De La Torre I, Silveira LH, Acevedo Vásquez EM, Chacón-Diaz R, Esteva-Spinetti MH, Alarcón GS, Pons-Estel BA. Factors associated with neuropsychiatric involvement in Latin American patients with systemic lupus erythematosus. Lupus 2021; 30:1481-1491. [PMID: 34082589 DOI: 10.1177/09612033211020364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Factors related to presentation of neuropsychiatric (NP) SLE manifestations, early in the course of the disease, and during follow up have not been clearly established. PURPOSE To identify disease and non-disease related factors associated with NP manifestations in early SLE. METHODS We included 1193 patients from the GLADEL inception cohort free of NP involvement at cohort entry. We evaluated the association of demographic, clinical and laboratory data with NP involvement during follow-up. STATISTICAL METHODS Independent factors associated with NP involvement were identified using a multivariable Cox regression model. RESULTS Factors independently associated with NP manifestations were: mestizo ethnicity (HR 1.701, 95% CI 1.282-2.258, p = 0.0002), myalgias/myositis (HR 1.832, 95% CI 1.335-2.515, p = 0.0002), pneumonitis (HR 2.476, 95% CI 1.085-5.648, p = 0.0312), shrinking lung (HR 2.428, 95% CI 1.074-5.493, p = 0.0331) and hemolytic anemia (HR 1.629, 95% CI 1.130-2.347, p = 0.0089). Longer disease duration at cohort entry (13 to 24 months) was associated with a lower risk of developing NP manifestations (HR 0.642, 95% CI 0.441-0.934, p = 0.0206). CONCLUSIONS Patients with myalgias/myositis, pneumonitis, shrinking lung and hemolytic anemia are at higher risk of NP involvement, whereas longer disease duration at cohort entry is associated with a lower risk of developing NP involvement.
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Affiliation(s)
| | - Hilda Fragoso-Loyo
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Ciudad de México, México
| | | | - Rosana Quintana
- Grupo Oroño - Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Guillermo J Pons-Estel
- Grupo Oroño - Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Luis J Catoggio
- Sección de Reumatología, Servicio de Clínica Médica, Hospital Italiano de Buenos Aires, Instituto Universitario Escuela de Medicina y Fundación Dr. Pedro M. Catoggio para el Progreso de la Reumatología, Buenos Aires, Argentina
| | - Mercedes A García
- Servicio de Reumatología, HIGA General San Martín, La Plata, Argentina
| | - Verónica Saurit
- Servicio de Reumatología, Hospital Privado Universitario de Córdoba, Córdoba, Argentina
| | - Cristina Drenkard
- Division of Rheumatology, Department of Medicine, Emory School of Medicine, Atlanta, GA, USA
| | - Eloisa Bonfa
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo SP, Brasil
| | - Eduardo F Borba
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo SP, Brasil
| | - Emilia Sato
- Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paul, Brasil
| | - Joao C Tavares Brenol
- Rheumatology Division, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Fernando Cavalcanti
- Serviço de Reumatologia do Hospital das Clínicas da Universidade Federal de Pernambuco (HC-UFPE), Recife, Brasil
| | - Nilzio A Da Silva
- Serviço de Reumatologia, Departamento de Clinica Medica, Facultad de Medicina, Hospital das Clínicas, Universidade Federal de Goiás, Goiânia, Brasil
| | - Lilian T Lavras Costallat
- Departamento de Clínica Médica, Faculdade de Ciências Medicas da UNICAMP, Universidade Estadual de Campinas, Campinas, Brasil
| | - Marlene Guibert Toledano
- Servicio Nacional de Reumatología, Centro de Investigaciones Médico-Quirúrgicas (CIMEQ), La Habana, Cuba
| | - Loreto Massardo
- Facultad de Medicina y Ciencia, Centro de Biología Celular y Biomedicina, Universidad San Sebastián, Santiago, Chile
| | - Oscar Neira
- Sección de Reumatología, Hospital del Salvador, Universidad de Chile, Unidad de Reumatología, Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Mario H Cardiel
- Centro de Investigación Clínica de Morelia, SC, Morelia, México
| | - Mary Carmen Amigo
- Servicio de Reumatología, Centro Médico ABC, Ciudad de México, México
| | | | - Luis H Silveira
- Departamento de Reumatología, Instituto Nacional de Cardiología "Ignacio Chávez", Ciudad de México, México
| | - Eduardo M Acevedo Vásquez
- Facultad de Medicina, Universidad Nacional Mayor de San Marcos. Servicio de Reumatología. Clínica San Felipe, Jesús María, Lima, Perú
| | - Rosa Chacón-Diaz
- Servicio de Reumatología, Policlínica Méndez Gimón, Caracas, Venezuela
| | | | - Graciela S Alarcón
- Division of Clinical Immunology and Rheumatology, Department of Medicine, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Medicine, School of Medicine, Universidad Peruana Cayetano, Heredia, Lima, Perú
| | - Bernardo A Pons-Estel
- Grupo Oroño - Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
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Dini C, Quiroga AV, Viña SZ, García MA. Extraction and Characterization of Proteins from Pachyrhizus ahipa Roots: an Unexploited Protein-Rich Crop. Plant Foods Hum Nutr 2021; 76:179-188. [PMID: 33755896 DOI: 10.1007/s11130-021-00890-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/11/2021] [Indexed: 05/14/2023]
Abstract
Pachyrhizus ahipa is an unexploited crop known to be rich in proteins compared to other edible roots and tubers. These proteins are not prolamins, thus ahipa represents an interesting new source of ingredients for gluten-free foods. In this work, ahipa proteins (AP) were extracted and partially characterized in pursuit of their use as food ingredients. The effect of ultrasound treatment on protein extraction efficiency was evaluated. AP were characterized by their size, amino acid composition, surface hydrophobicity, intrinsic fluorescence, FTIR spectra, solubility, and thermal and emulsifying properties. AP were efficiently removed from the vegetal tissue using PBS or water, regardless of the use of ultrasound, but not easily recovered by precipitation. This protein fraction was composed of small proteins, with sizes ranging from 9 to 30 kDa, and highly polar. AP resulted particularly rich in aspartic acid (59% of the total amino acid content), for which they can be classified as Asp-rich proteins. Their elevated content of acidic groups was evidenced in the ATR-FTIR spectrum. The amide I band deconvolution as well as the low surface hydrophobicity and denaturation enthalpy indicated that these proteins are mainly unordered structures. The emulsifying properties of AP were enhanced when the concentration was increased from 0.1 to 1% (w/v) but resulted lower than those of soy protein. The high polarity, small size, and low isoelectric point make AP particularly suitable for acidic food matrices.
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Affiliation(s)
- Cecilia Dini
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), Facultad de Ciencias Exactas UNLP - CONICET La Plata - CICPBA, 47 y 116 S/N, 1900, La Plata, Buenos Aires, Argentina.
| | - A V Quiroga
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), Facultad de Ciencias Exactas UNLP - CONICET La Plata - CICPBA, 47 y 116 S/N, 1900, La Plata, Buenos Aires, Argentina
| | - S Z Viña
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), Facultad de Ciencias Exactas UNLP - CONICET La Plata - CICPBA, 47 y 116 S/N, 1900, La Plata, Buenos Aires, Argentina
- Curso de Bioquímica y Fitoquímica, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, 60 y 119 S/N, 1900, La Plata, Buenos Aires, Argentina
| | - M A García
- CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), Facultad de Ciencias Exactas UNLP - CONICET La Plata - CICPBA, 47 y 116 S/N, 1900, La Plata, Buenos Aires, Argentina
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Blondon M, Jimenez D, Robert‐Ebadi H, Del Toro J, Lopez‐Jimenez L, Falga C, Skride A, Font L, Vazquez FJ, Bounameaux H, Monreal M, Prandoni P, Brenner, B, Farge‐Bancel D, Barba R, Di Micco P, Bertoletti L, Schellong S, Tzoran I, Reis A, Bosevski M, Malý R, Verhamme P, Caprini JA, My Bui H, Adarraga MD, Agud M, Aibar J, Aibar MA, Alfonso J, Amado C, Arcelus JI, Baeza C, Ballaz A, Barba R, Barbagelata C, Barrón M, Barrón‐Andrés B, Blanco‐Molina A, Botella E, Camon AM, Castro J, Caudevilla MA, Cerdà P, Chasco L, Criado J, de Ancos C, de Miguel J, Demelo‐Rodríguez P, Díaz‐Peromingo JA, Díez‐Sierra J, Díaz‐Simón R, Domínguez IM, Encabo M, Escribano JC, Falgá C, Farfán AI, Fernández‐Capitán C, Fernández‐Reyes JL, Fidalgo MA, Flores K, Font C, Francisco I, Gabara C, Galeano‐Valle F, García MA, García‐Bragado F, García‐Mullor MM, Gavín‐Blanco O, Gavín‐Sebastián O, Gil‐Díaz A, Gómez‐Cuervo C, González‐Martínez J, Grau E, Guirado L, Gutiérrez J, Hernández‐Blasco L, Jara‐Palomares L, Jaras MJ, Jiménez D, Joya MD, Jou I, Lacruz B, Lecumberri R, Lima J, Lobo JL, López‐Brull H, López‐Jiménez L, López‐Miguel P, López‐Núñez JJ, López‐Reyes R, López‐Sáez JB, Lorente MA, Lorenzo A, Loring M, Madridano O, Maestre A, Marchena PJ, Martín del Pozo M, Martín‐Martos F, Martínez‐Baquerizo C, Mella C, Mellado M, Mercado MI, Moisés J, Morales MV, Muñoz‐Blanco A, Muñoz‐Guglielmetti D, Muñoz‐Rivas N, Nart E, Nieto JA, Núñez MJ, Olivares MC, Ortega‐Michel C, Ortega‐Recio MD, Osorio J, Otalora S, Otero R, Parra P, Parra V, Pedrajas JM, Pellejero G, Pérez‐Jacoiste A, Peris ML, Pesántez D, Porras JA, Portillo J, Reig L, Riera‐Mestre A, Rivas A, Rodríguez‐Cobo A, Rodríguez‐Matute C, Rogado J, Rosa V, Rubio CM, Ruiz‐Artacho P, Ruiz‐Giménez N, Ruiz‐Ruiz J, Ruiz‐Sada P, Sahuquillo JC, Salgueiro G, Sampériz A, Sánchez‐Muñoz‐Torrero JF, Sancho T, Sigüenza P, Sirisi M, Soler S, Suárez S, Suriñach JM, Tiberio G, Torres MI, Tolosa C, Trujillo‐Santos J, Uresandi F, Usandizaga E, Valle R, Vela JR, Vidal G, Vilar C, Villares P, Zamora C, Gutiérrez P, Vázquez FJ, Vanassche T, Vandenbriele C, Verhamme P, Hirmerova J, Malý R, Salgado E, Benzidia I, Bertoletti L, Bura‐Riviere A, Crichi B, Debourdeau P, Espitia O, Farge‐Bancel D, Helfer H, Mahé I, Moustafa F, Poenou G, Schellong S, Braester A, Brenner B, Tzoran I, Amitrano M, Bilora F, Bortoluzzi C, Brandolin B, Ciammaichella M, Colaizzo D, Dentali F, Di Micco P, Giammarino E, Grandone E, Mangiacapra S, Mastroiacovo D, Maida R, Mumoli N, Pace F, Pesavento R, Pomero F, Prandoni P, Quintavalla R, Rocci A, Siniscalchi C, Tufano A, Visonà A, Vo Hong N, Zalunardo B, Kalejs RV, Maķe K, Ferreira M, Fonseca S, Martins F, Meireles J, Bosevski M, Zdraveska M, Mazzolai L, Caprini JA, Tafur AJ, Weinberg I, Wilkins H, Bui HM. Comparative clinical prognosis of massive and non-massive pulmonary embolism: A registry-based cohort study. J Thromb Haemost 2021; 19:408-416. [PMID: 33119949 DOI: 10.1111/jth.15146] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 09/29/2020] [Accepted: 10/21/2020] [Indexed: 01/16/2023]
Abstract
AIMS Little is known about the prognosis of patients with massive pulmonary embolism (PE) and its risk of recurrent venous thromboembolism (VTE) compared with non-massive PE, which may inform clinical decisions. Our aim was to compare the risk of recurrent VTE, bleeding, and mortality after massive and non-massive PE during anticoagulation and after its discontinuation. METHODS AND RESULTS We included all participants in the RIETE registry who suffered a symptomatic, objectively confirmed segmental or more central PE. Massive PE was defined by a systolic hypotension at clinical presentation (<90 mm Hg). We compared the risks of recurrent VTE, major bleeding, and mortality using time-to-event multivariable competing risk modeling. There were 3.5% of massive PE among 38 996 patients with PE. During the anticoagulation period, massive PE was associated with a greater risk of major bleeding (subhazard ratio [sHR] 1.72, 95% confidence interval [CI] 1.28-2.32), but not of recurrent VTE (sHR 1.15, 95% CI 0.75-1.74) than non-massive PE. An increased risk of mortality was only observed in the first month after PE. After discontinuation of anticoagulation, among 11 579 patients, massive PE and non-massive PE had similar risks of mortality, bleeding, and recurrent VTE (sHR 0.85, 95% CI 0.51-1.40), but with different case fatality of recurrent PE (11.1% versus 2.4%, P = .03) and possibly different risk of recurrent fatal PE (sHR 3.65, 95% CI 0.82-16.24). CONCLUSION In this large prospective registry, the baseline hemodynamic status of the incident PE did not influence the risk of recurrent VTE, during and after the anticoagulation periods, but was possibly associated with recurrent PE of greater severity.
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Affiliation(s)
- Marc Blondon
- Division of Angiology and Hemostasis Geneva University Hospitals and Faculty of Medicine Geneva Switzerland
| | - David Jimenez
- Respiratory Department Hospital Ramón y Cajal and Medicine Department Universidad de Alcalá (IRYCIS) Madrid Spain
| | - Helia Robert‐Ebadi
- Division of Angiology and Hemostasis Geneva University Hospitals and Faculty of Medicine Geneva Switzerland
| | - Jorge Del Toro
- Department of Internal Medicine Hospital General Universitario Gregorio Marañón Madrid Spain
| | | | - Conxita Falga
- Department of Internal Medicine Hospital de Mataro Barcelona Spain
| | - Andris Skride
- Department of Cardiology Ospedale Pauls Stradins Clinical University Hospital Riga Latvia
| | - Llorenç Font
- Department of Haematology Hospital de Tortosa Verge de la Cinta Tarragona Spain
| | | | - Henri Bounameaux
- Division of Angiology and Hemostasis Geneva University Hospitals and Faculty of Medicine Geneva Switzerland
| | - Manuel Monreal
- Department of Internal Medicine Hospital Germans Trias i Pujol Badalona Spain
- Universidad Catolica de Murcia Murcia Spain
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Babini A, Cappuccio AM, Caprarulo C, Casado G, Eimon A, Figueredo H, García MA, Magri S, Mannucci P, Perez Rodriguez S, Pons-Estel BA, Velozo EJ, Iglesias-Rodriguez M, Streger G. Evaluation of belimumab treatment in patients with systemic lupus erythematosus in a clinical practice setting: Results from a 24-month OBSErve study in Argentina. Lupus 2020; 29:1385-1396. [PMID: 32791930 PMCID: PMC7536527 DOI: 10.1177/0961203320947814] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective To describe clinical effectiveness of belimumab for systemic lupus
erythematosus (SLE) in real-world practice in Argentina. Methods This retrospective, observational study analysed medical record data of
patients with SLE treated with belimumab in 15 centres in Argentina. Primary
endpoint: overall clinical response (assessed on a scale similar to the
6-point Physician Global Assessment) at months 6, 12, 18 and 24, all versus
index (belimumab initiation). Secondary endpoints: improvement in disease
activity (SELENA-SLEDAI), SLE manifestations, and corticosteroid dose
change. Results Records for 81 patients (91% female) were analysed. Clinical improvements
were reported for 95%, 95%, 98% and 100% patients at 6, 12, 18, and
24 months post index, respectively. Mean SELENA-SLEDAI score decreased from
11.21 at index to 4.76, 3.77, 3.86 and 2.17 at 6, 12, 18, and 24 months post
index, respectively. Number of flares decreased from 1.05 at index to 0.21,
0.09, 0.22 and 0.30 at 6, 12, 18, and 24 months post index, respectively.
Mean corticosteroid dose was 14.59 mg/day at index, and 6.45, 5.18, 5.17 and
4.78 mg/day at 6, 12, 18, and 24 months post index, respectively. Conclusions Real-world patients with SLE treated with belimumab in Argentina demonstrated
clinical improvements and reductions in corticosteroid dose.
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Affiliation(s)
- A Babini
- Hospital Italiano de Córdoba, Córdoba, Argentina
| | | | - C Caprarulo
- Consultorio Privado, Concordia, Entre Rios, Argentina
| | - G Casado
- Servicio de Reumatología, Hospital Militar Central, Buenos Aires, Argentina
| | - A Eimon
- CEMIC, Buenos Aires, Argentina
| | - H Figueredo
- Hospital de Alta Complejidad 'Pte. Juan Domingo Perón', Formosa, Argentina
| | - M A García
- Hospital Interzonal General de Agudos José de San Martín, La Plata, Argentina
| | - S Magri
- Hospital Italiano de La Plata, Buenos Aires, Argentina
| | - P Mannucci
- Aprillus Asistencia e Investigación de Arcis Salud SRL, Buenos Aires, Argentina
| | | | - B A Pons-Estel
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (CREAR), Grupo Oroño, Sanatorio Parque, Rosario, Santa Fé, Argentina
| | - E J Velozo
- Unidad de Reumatologia, Universidad y Sanatorio Adventista del Plata, Entre Rios, Argentina
| | | | - G Streger
- Immunology & Specialty Medicine, GSK, Buenos Aires, Argentina
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Quintana R, Pons-Estel GJ, Roberts K, Sacnún M, Serrano R, Nieto R, Conti S, Gervasoni V, Catoggio LJ, Soriano ER, Scolnik M, García MA, Alvarellos A, Saurit V, Berbotto GA, Sato EI, Costallat LTL, Neto EFB, Bonfa E, Xavier RM, de Oliveira e Silva Montandon AC, Molina-Restrepo JF, Iglesias-Gamarra A, Guibert-Toledano M, Reyes-Llerena GA, Massardo L, Neira OJ, Cardiel MH, Barile-Fabris LA, Amigo MC, Silveira LH, Torre IGDL, Acevedo-Vásquez EM, Ugarte-Gil MF, Alfaro-Lozano JL, Segami MI, Chacón-Díaz R, Esteva-Spinetti MH, Gomez-Puerta JA, Alarcón GS, Pons-Estel BA. Clinical features, damage accrual, and survival in patients with familial systemic lupus erythematosus: data from a multi-ethnic, multinational Latin American lupus cohort. Lupus 2020; 29:1140-1145. [DOI: 10.1177/0961203320935184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives This study aimed to compare the clinical features, damage accrual, and survival of patients with familial and sporadic systemic lupus erythematosus (SLE). Methods A multi-ethnic, multinational Latin American SLE cohort was studied. Familial lupus was defined as patients with a first-degree SLE relative; these relatives were interviewed in person or by telephone. Clinical variables, disease activity, damage, and mortality were compared. Odds ratios (OR) and 95% confidence intervals (CI) were estimated. Hazard ratios (HR) were calculated using Cox proportional hazard adjusted for potential confounders for time to damage and mortality. Results A total of 66 (5.6%) patients had familial lupus, and 1110 (94.4%) had sporadic lupus. Both groups were predominantly female, of comparable age, and of similar ethnic distribution. Discoid lupus (OR = 1.97; 95% CI 1.08–3.60) and neurologic disorder (OR = 1.65; 95% CI 1.00–2.73) were significantly associated with familial SLE; pericarditis was negatively associated (OR = 0.35; 95% CI 0.14–0.87). The SLE Disease Activity Index and Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI) were similar in both groups, although the neuropsychiatric (45.4% vs. 33.5%; p = 0.04) and musculoskeletal (6.1% vs. 1.9%; p = 0.02) domains of the SDI were more frequent in familial lupus. They were not retained in the Cox models (by domains). Familial lupus was not significantly associated with damage accrual (HR = 0.69; 95% CI 0.30–1.55) or mortality (HR = 1.23; 95% CI 0.26–4.81). Conclusion Familial SLE is not characterized by a more severe form of disease than sporadic lupus. We also observed that familial SLE has a higher frequency of discoid lupus and neurologic manifestations and a lower frequency of pericarditis.
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Affiliation(s)
- Rosana Quintana
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Hospital Provincial de Rosario, Rosario, Argentina
| | - Guillermo J Pons-Estel
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Hospital Provincial de Rosario, Rosario, Argentina
| | | | | | - Rosa Serrano
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Romina Nieto
- Hospital Provincial de Rosario, Rosario, Argentina
| | | | | | | | | | - Marina Scolnik
- Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Mercedes A García
- Hospital Interzonal General de Agudos General San Martín, La Plata, Argentina
| | | | | | | | - Emilia I Sato
- Universidade Federal da Sao Paulo (UNIFESP), Sao Paulo, Brazil
| | | | | | | | - Ricardo M Xavier
- Hospital da Clinicas da Porto Alegre, Universidade Federal do Rio Grande do Sul, Brazil
| | | | | | | | | | | | - Loreto Massardo
- Facultad de Medicina, Universidad San Sebastián, Santiago, Chile
| | - Oscar J Neira
- Hospital del Salvador, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mario H Cardiel
- Centro de Investigación Clínica de Morelia SC, Morelia, Mexico
| | | | | | - Luis H Silveira
- Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | | | | | - Manuel F Ugarte-Gil
- Servicio de Reumatología, Hospital General Guillermo Almenara Irigoyen, EsSalud, Lima, Peru
- Universidad Científica del Sur, Lima, Peru
| | | | | | - Rosa Chacón-Díaz
- Centro Nacional de Enfermedades Reumáticas, Hospital Universitario de Caracas, Caracas, Venezuela
| | | | | | - Graciela S Alarcón
- The University of Alabama at Birmingham, Birmingham, USA
- Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Bernardo A Pons-Estel
- Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
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Avnery O, Martin M, Bura-Riviere A, Barillari G, Mazzolai L, Mahé I, Marchena PJ, Verhamme P, Monreal M, Ellis MH, Aibar MA, Aibar J, Amado C, Arcelus JI, Ballaz A, Barba R, Barrón M, Barrón‐Andrés B, Bascuñana J, ina A, Camon AM, Cañas I, Carrasco C, Castro J, Ancos C, Toro J, Demelo P, Díaz‐Peromingo JA, Falgá C, Farfán AI, Fernández‐Capitán C, Fernández‐Criado MC, Fernández‐Núñez S, Fidalgo MA, Font C, Font L, Freire M, Gallego M, García MA, García‐Bragado F, García‐Morillo M, García‐Raso A, Gavín O, Gayol MC, Gil‐Díaz A, Gómez V, Gómez‐Cuervo C, González‐Martínez J, Grau E, Gutiérrez J, Hernández‐Blasco LM, Iglesias M, Jara‐Palomares L, Jaras MJ, Jiménez R, Jiménez‐Castro D, Jiménez‐López J, Joya MD, Lima J, Llamas P, Lobo JL, López‐Jiménez L, López‐Miguel P, López‐Núñez JJ, López‐Reyes R, López‐Sáez JB, Lorente MA, Lorenzo A, Loring M, Madridano O, Maestre A, Martín del Pozo M, Martín‐Guerra JM, Martín‐Romero M, Mellado M, Morales MV, Muñoz N, Nieto‐Cabrera MA, Nieto‐Rodríguez JA, Núñez‐Ares A, Núñez MJ, Olivares MC, Otalora S, Otero R, Pedrajas JM, Pellejero G, Pérez‐Rus G, Peris ML, Porras JA, Rivas A, Rodríguez‐Dávila MA, Rodríguez‐Hernández A, Rubio CM, Ruiz‐Artacho P, Ruiz‐Ruiz J, Ruiz‐Torregrosa P, Ruiz‐Sada P, Sahuquillo JC, Salazar V, Sampériz A, Sánchez‐Muñoz‐Torrero JF, Sancho T, Soler S, Sopeña B, Suriñach JM, Tolosa C, Torres MI, Trujillo‐Santos J, Uresandi F, Valle R, Vidal G, Villares P, Gutiérrez P, Vázquez FJ, Vilaseca A, Vanassche T, Vandenbriele C, Hirmerova J, Malý R, Salgado E, Benzidia I, Bertoletti L, Debourdeau P, Farge‐Bancel D, Hij A, Moustafa F, Schellong S, Braester A, Brenner B, Tzoran I, Sharif‐Kashani B, Bilora F, Bortoluzzi C, Bucherini E, Ciammaichella M, Dentali F, Di Micco P, Di Pangrazio M, Maida R, Mastroiacovo D, Pace F, Pallotti G, Parisi R, Pesavento R, Prandoni P, Quintavalla R, Rocci A, Siniscalchi C, Tufano A, Visonà A, Vo Hong N, Gibietis V, Skride A, Strautmane S, Bosevski M, Zdraveska M, Bounameaux H, Fresa M, Ney B, Caprini J, Bui HM, Pham KQ. D-dimer levels and risk of recurrence following provoked venous thromboembolism: findings from the RIETE registry. J Intern Med 2020; 287:32-41. [PMID: 31394000 DOI: 10.1111/joim.12969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Patients with venous thromboembolism (VTE) secondary to transient risk factors may develop VTE recurrences after discontinuing anticoagulation. Identifying at-risk patients could help to guide the duration of therapy. METHODS We used the RIETE database to assess the prognostic value of d-dimer testing after discontinuing anticoagulation to identify patients at increased risk for recurrences. Transient risk factors were classified as major (postoperative) or minor (pregnancy, oestrogen use, immobilization or recent travel). RESULTS In December 2018, 1655 VTE patients with transient risk factors (major 460, minor 1195) underwent d-dimer measurements after discontinuing anticoagulation. Amongst patients with major risk factors, the recurrence rate was 5.74 (95% CI: 3.19-9.57) events per 100 patient-years in those with raised d-dimer levels and 2.68 (95% CI: 1.45-4.56) in those with normal levels. Amongst patients with minor risk factors, the rates were 7.79 (95% CI: 5.71-10.4) and 3.34 (95% CI: 2.39-4.53), respectively. Patients with major risk factors and raised d-dimer levels (n = 171) had a nonsignificantly higher rate of recurrences (hazard ratio [HR]: 2.14; 95% CI: 0.96-4.79) than those with normal levels. Patients with minor risk factors and raised d-dimer levels (n = 382) had a higher rate of recurrences (HR: 2.34; 95% CI: 1.51-3.63) than those with normal levels. On multivariate analysis, raised d-dimers (HR: 1.74; 95% CI: 1.09-2.77) were associated with an increased risk for recurrences in patients with minor risk factors, not in those with major risk factors. CONCLUSIONS Patients with raised d-dimer levels after discontinuing anticoagulant therapy for VTE provoked by a minor transient risk factor were at an increased risk for recurrences.
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Affiliation(s)
- O Avnery
- Meir Medical Center, Hematology Institute and Blood Bank, Kfar Saba, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - M Martin
- Hospital Infanta Sofia San Sebastian de los Reyes and Universidad Europea de Madrid, Madrid, Spain
| | - A Bura-Riviere
- Department of Vascular Medicine, Hôpital de Rangueil, Toulouse, France
| | - G Barillari
- Department of Internal Medicine, Ospedale S. Maria della Misericordia, Udine, Italy
| | - L Mazzolai
- Department of Angiology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - I Mahé
- Department of Internal Medicine, Hôpital Louis Mourier, Colombes (APHP), University Paris 7, Colombes, France
| | - P J Marchena
- Department of Internal Medicine and Emergency, Parc Sanitari Sant Joan de Deu-Hospital General, Barcelona, Spain
| | - P Verhamme
- Vascular Medicine and Haemostasis, University of Leuven, Leuven, Belgium
| | - M Monreal
- Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - M H Ellis
- Meir Medical Center, Hematology Institute and Blood Bank, Kfar Saba, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Pimentel-Quiroz VR, Ugarte-Gil MF, Harvey GB, Wojdyla D, Pons-Estel GJ, Quintana R, Esposto A, García MA, Catoggio LJ, Cardiel MH, Barile LA, Amigo MC, Sato EI, Bonfa E, Borba E, Lavras Costallat LT, Neira OJ, Massardo L, Guibert-Toledano M, Chacón-Díaz R, Alarcón GS, Pons-Estel BA. Factors predictive of serious infections over time in systemic lupus erythematosus patients: data from a multi-ethnic, multi-national, Latin American lupus cohort. Lupus 2019; 28:1101-1110. [DOI: 10.1177/0961203319860579] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aim The aim of this study was to identify factors predictive of serious infections over time in patients with systemic lupus erythematosus (SLE). Methods A multi-ethnic, multi-national Latin American SLE cohort was studied. Serious infection was defined as one that required hospitalization, occurred during a hospitalization or led to death. Potential predictors included were sociodemographic factors, clinical manifestations (per organ involved, lymphopenia and leukopenia, independently) and previous infections at baseline. Disease activity (SLEDAI), damage (SLICC/ACR Damage Index), non-serious infections, glucocorticoids, antimalarials (users and non-users), and immunosuppressive drugs use; the last six variables were examined as time-dependent covariates. Cox regression models were used to evaluate the predictors of serious infections using a backward elimination procedure. Univariable and multivariable analyses were performed. Results Of the 1243 patients included, 1116 (89.8%) were female. The median (interquartile range) age at diagnosis and follow-up time were 27 (20–37) years and 47.8 (17.9–68.6) months, respectively. The incidence rate of serious infections was 3.8 cases per 100 person-years. Antimalarial use (hazard ratio: 0.69; 95% confidence interval (CI): 0.48–0.99; p = 0.0440) was protective, while doses of prednisone >15 and ≤60 mg/day (hazard ratio: 4.18; 95 %CI: 1.69–10.31; p = 0.0019) and >60 mg/day (hazard ratio: 4.71; 95% CI: 1.35–16.49; p = 0.0153), use of methylprednisolone pulses (hazard ratio: 1.53; 95% CI: 1.10–2.13; p = 0.0124), increase in disease activity (hazard ratio: 1.03; 95% CI: 1.01–1.04; p = 0.0016) and damage accrual (hazard ratio: 1.22; 95% CI: 1.11–1.34; p < 0.0001) were predictive factors of serious infections. Conclusions Over time, prednisone doses higher than 15 mg/day, use of methylprednisolone pulses, increase in disease activity and damage accrual were predictive of infections, whereas antimalarial use was protective against them in SLE patients.
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Affiliation(s)
- V R Pimentel-Quiroz
- Department of Rheumatology, Hospital Nacional ‘Guillermo Almenara Irigoyen’ Essalud, Lima, Peru
| | - M F Ugarte-Gil
- Department of Rheumatology, Hospital Nacional ‘Guillermo Almenara Irigoyen’ Essalud, Lima, Peru
- Universidad Científica del Sur, Lima, Peru
| | - GB Harvey
- Escuela de Estadística, Facultad de Ciencias Económicas y Estadística, Universidad Nacional de Rosario, Rosario, Argentina
| | - D Wojdyla
- GLADEL consultant, Rosario, Argentina
| | - G J Pons-Estel
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - R Quintana
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - A Esposto
- Servicio de Infectología, Hospital Interzonal General de Agudos ‘General San Martín’, La Plata, Argentina
| | - M A García
- Servicio de Infectología, Hospital Interzonal General de Agudos ‘General San Martín’, La Plata, Argentina
| | - L J Catoggio
- Servicio de Reumatolgía, Hospital Italiano and Fundación ‘Dr. Pedro M. Catoggio para el Progreso de la Reumatología’, Buenos Aires, Argentina
| | - M H Cardiel
- Centro de Investigación Clínica de Morelia, Morelia, Michoacán, Mexico
| | - L A Barile
- Servicio de Reumatología, Hospital Ángeles del Pedregal, Ciudad de México, Mexico
| | - M -C Amigo
- Centro Médico ABC, Ciudad de México, Mexico
| | - E I Sato
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - E Bonfa
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - E Borba
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - L T Lavras Costallat
- Departamento de Clínica Médica, Faculdade de Ciências Medicas da UNICAMP, Universidade Estadual de Campinas, Campinas, Brazil
| | - O J Neira
- Sección de Reumatología, Hospital del Salvador, Universidad de Chile. Unidad de Reumatología, Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - L Massardo
- Centro de Biología Celular y Biomedicina, Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Chile
| | | | - R Chacón-Díaz
- Servicio de Reumatología, Policlínica Méndez Gimón, Caracas, Venezuela
| | - G S Alarcón
- Division of Clinical Immunology and Rheumatology, Department of Medicine, School of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Medicine, School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - B A Pons-Estel
- Grupo Oroño, Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
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García L, Pena CE, Maldonado RÁ, Costi C, Mamberti M, Martins E, García MA. Increased renal damage in hypocomplementemic patients with ANCA-associated vasculitis: retrospective cohort study. Clin Rheumatol 2019; 38:2819-2824. [PMID: 31222573 DOI: 10.1007/s10067-019-04636-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 01/06/2019] [Revised: 04/14/2019] [Accepted: 06/04/2019] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The complement system has an important role in the pathogenesis of vasculitis associated with antineutrophilic cytoplasmic antibody (AAV) mainly at the level of the kidneys because patients with complement deposits on the glomerular basal membrane present more aggressive disease compared with those with pauci-immune vasculitis. AIM To analyze the association of hypocomplementemia with the clinical manifestations, laboratory data, renal histology, progress to renal insufficiency, and mortality of patients with AAV. METHODS Retrospective cohort study (2000-2007) included 93 patients with AAV. Hypocomplementemia is defined as having C3 values lower than 80 mg/dL or C4 values below 15 mg/dL. Demographic, statistical, clinical, hematological, serological, and histopathological characteristics of all the patients with and without diagnosis of hypocomplementemia were compared. In order to evaluate variable independence, a logistic regression analysis was used. RESULTS Ninety-three patients were studied of whom 63 (67.7%) had complement dosage at the moment of AAV diagnosis. Seven patients (11.1%) presented hypocomplementemia and a greater kidney involvement compared with normocomplementemic patients. Thirty renal biopsies were analyzed and 4 (13.3%) showed immunocomplex (IC) or complement deposits by an immunofluorescence test (IFT). Patients with "non-pauci-immune" AAV also presented terminal chronic renal disease (TCRD). CONCLUSION There is an association between low complement and the degree of renal damage in patients with AAV. Patients with renal biopsies confirming IC and/or complement deposits showed more aggressive renal disease. Key Points • The complement system has an important role in the pathogenesis of vasculitis associated to antineutrophilic cytoplasmic antibody. • The studies in murine models confirming the complement activation by alternative pathway and particularly the receptor C5a (C5aR) is necessary for the development of glomerulonefritis. • Complement deposit observed in the renal biopsies of patients diagnosed with AAV was correlated to greater kidney damage, greater proteinuria and major disease activity compared to patients diagnosed with typical pauci-immune vasculitis. • The presence of hypocomplementemia at the onset of the disease was also associated with a greater organ involvement, poor prognosis and greater mortality.
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Affiliation(s)
- L García
- Department of Rheumatology, Hospital San Martín de La Plata, La Plata, Buenos Aires, Argentina.
| | - C E Pena
- Department of Rheumatology, Hospital San Martín de La Plata, La Plata, Buenos Aires, Argentina
| | - R Águila Maldonado
- Department of Rheumatology, Hospital San Martín de La Plata, La Plata, Buenos Aires, Argentina
| | - C Costi
- Department of Rheumatology, Hospital San Martín de La Plata, La Plata, Buenos Aires, Argentina
| | - M Mamberti
- Department of Nephrology, Hospital San Martín de La Plata, La Plata, Argentina
| | - E Martins
- Institute of Development and Pediatric Research Profesor Dr. Fernando Viteri, La Plata, Argentina
| | - M A García
- Department of Rheumatology, Hospital San Martín de La Plata, La Plata, Buenos Aires, Argentina
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Sarmiento ME, Alvarez N, Chin KL, Bigi F, Tirado Y, García MA, Anis FZ, Norazmi MN, Acosta A. Tuberculosis vaccine candidates based on mycobacterial cell envelope components. Tuberculosis (Edinb) 2019; 115:26-41. [PMID: 30948174 DOI: 10.1016/j.tube.2019.01.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 11/20/2018] [Revised: 01/12/2019] [Accepted: 01/16/2019] [Indexed: 12/11/2022]
Abstract
Even after decades searching for a new and more effective vaccine against tuberculosis, the scientific community is still pursuing this goal due to the complexity of its causative agent, Mycobacterium tuberculosis (Mtb). Mtb is a microorganism with a robust variety of survival mechanisms that allow it to remain in the host for years. The structure and nature of the Mtb envelope play a leading role in its resistance and survival. Mtb has a perfect machinery that allows it to modulate the immune response in its favor and to adapt to the host's environmental conditions in order to remain alive until the moment to reactivate its normal growing state. Mtb cell envelope protein, carbohydrate and lipid components have been the subject of interest for developing new vaccines because most of them are responsible for the pathogenicity and virulence of the bacteria. Many indirect evidences, mainly derived from the use of monoclonal antibodies, support the potential protective role of Mtb envelope components. Subunit and DNA vaccines, lipid extracts, liposomes and membrane vesicle formulations are some examples of technologies used, with encouraging results, to evaluate the potential of these antigens in the protective response against Mtb.
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Affiliation(s)
- M E Sarmiento
- School of Health Sciences (PPSK), Universiti Sains Malaysia (USM), 16150 Kubang Kerian, Kelantan, Malaysia
| | - N Alvarez
- Rutgers New Jersey Medical School, Public Health Research Institute, Newark, NJ, USA
| | - K L Chin
- Department of Biomedical Sciences and Therapeutic, Faculty of Medicine and Health Sciences (FPSK), Universiti Malaysia Sabah (UMS), Sabah, Malaysia
| | - F Bigi
- Institute of Biotechnology, INTA, Buenos Aires, Argentina
| | - Y Tirado
- Finlay Institute of Vaccines, La Habana, Cuba
| | - M A García
- Finlay Institute of Vaccines, La Habana, Cuba
| | - F Z Anis
- School of Health Sciences (PPSK), Universiti Sains Malaysia (USM), 16150 Kubang Kerian, Kelantan, Malaysia
| | - M N Norazmi
- School of Health Sciences (PPSK), Universiti Sains Malaysia (USM), 16150 Kubang Kerian, Kelantan, Malaysia.
| | - A Acosta
- School of Health Sciences (PPSK), Universiti Sains Malaysia (USM), 16150 Kubang Kerian, Kelantan, Malaysia.
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Pons-Estel BA, Bonfa E, Soriano ER, Cardiel MH, Izcovich A, Popoff F, Criniti JM, Vásquez G, Massardo L, Duarte M, Barile-Fabris LA, García MA, Amigo MC, Espada G, Catoggio LJ, Sato EI, Levy RA, Acevedo Vásquez EM, Chacón-Díaz R, Galarza-Maldonado CM, Iglesias Gamarra AJ, Molina JF, Neira O, Silva CA, Vargas Peña A, Gómez-Puerta JA, Scolnik M, Pons-Estel GJ, Ugolini-Lopes MR, Savio V, Drenkard C, Alvarellos AJ, Ugarte-Gil MF, Babini A, Cavalcanti A, Cardoso Linhares FA, Haye Salinas MJ, Fuentes-Silva YJ, Montandon de Oliveira E Silva AC, Eraso Garnica RM, Herrera Uribe S, Gómez-Martín D, Robaina Sevrini R, Quintana RM, Gordon S, Fragoso-Loyo H, Rosario V, Saurit V, Appenzeller S, Dos Reis Neto ET, Cieza J, González Naranjo LA, González Bello YC, Collado MV, Sarano J, Retamozo S, Sattler ME, Gamboa-Cárdenas RV, Cairoli E, Conti SM, Amezcua-Guerra LM, Silveira LH, Borba EF, Pera MA, Alba Moreyra PB, Arturi V, Berbotto GA, Gerling C, Gobbi CA, Gervasoni VL, Scherbarth HR, Brenol JCT, Cavalcanti F, Costallat LTL, Da Silva NA, Monticielo OA, Seguro LPC, Xavier RM, Llanos C, Montúfar Guardado RA, Garcia de la Torre I, Pineda C, Portela Hernández M, Danza A, Guibert-Toledano M, Reyes GL, Acosta Colman MI, Aquino AM, Mora-Trujillo CS, Muñoz-Louis R, García Valladares I, Orozco MC, Burgos PI, Betancur GV, Alarcón GS. First Latin American clinical practice guidelines for the treatment of systemic lupus erythematosus: Latin American Group for the Study of Lupus (GLADEL, Grupo Latino Americano de Estudio del Lupus)-Pan-American League of Associations of Rheumatology (PANLAR). Ann Rheum Dis 2018; 77:1549-1557. [PMID: 30045853 PMCID: PMC6225798 DOI: 10.1136/annrheumdis-2018-213512] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/26/2018] [Accepted: 06/28/2018] [Indexed: 11/24/2022]
Abstract
Systemic lupus erythematosus (SLE), a complex and heterogeneous autoimmune disease, represents a significant challenge for both diagnosis and treatment. Patients with SLE in Latin America face special problems that should be considered when therapeutic guidelines are developed. The objective of the study is to develop clinical practice guidelines for Latin American patients with lupus. Two independent teams (rheumatologists with experience in lupus management and methodologists) had an initial meeting in Panama City, Panama, in April 2016. They selected a list of questions for the clinical problems most commonly seen in Latin American patients with SLE. These were addressed with the best available evidence and summarised in a standardised format following the Grading of Recommendations Assessment, Development and Evaluation approach. All preliminary findings were discussed in a second face-to-face meeting in Washington, DC, in November 2016. As a result, nine organ/system sections are presented with the main findings; an 'overarching' treatment approach was added. Special emphasis was made on regional implementation issues. Best pharmacologic options were examined for musculoskeletal, mucocutaneous, kidney, cardiac, pulmonary, neuropsychiatric, haematological manifestations and the antiphospholipid syndrome. The roles of main therapeutic options (ie, glucocorticoids, antimalarials, immunosuppressant agents, therapeutic plasma exchange, belimumab, rituximab, abatacept, low-dose aspirin and anticoagulants) were summarised in each section. In all cases, benefits and harms, certainty of the evidence, values and preferences, feasibility, acceptability and equity issues were considered to produce a recommendation with special focus on ethnic and socioeconomic aspects. Guidelines for Latin American patients with lupus have been developed and could be used in similar settings.
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Affiliation(s)
- Bernardo A Pons-Estel
- Departamento de Medicina Interna, Grupo Oroño-Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
| | - Eloisa Bonfa
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Enrique R Soriano
- Sección de Reumatología, Servicio de Clínica Médica, Instituto Universitario, Escuela de Medicina, and Fundación Dr Pedro M Catoggio para el Progreso de la Reumatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Mario H Cardiel
- Centro de Investigación Clínica de Morelia, SC, Morelia, México
| | - Ariel Izcovich
- Servicio de Clínica Médica del Hospital Alemán de Buenos Aires, Hospital Alemán de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Federico Popoff
- Servicio de Clínica Médica del Hospital Alemán de Buenos Aires, Hospital Alemán de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Juan M Criniti
- Servicio de Clínica Médica del Hospital Alemán de Buenos Aires, Hospital Alemán de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gloria Vásquez
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, Hospital Universitario, Fundación San Vicente, Medellín, Colombia
| | - Loreto Massardo
- Centro de Biología Celular y Biomedicina, Facultad de Medicina y Ciencia. Universidad San Sebastián, Santiago, Chile
| | - Margarita Duarte
- Departamento de Reumatología, Hospital de Clínicas, Facultad de Ciencias Médicas, Universidad Nacional de Asunción, Asunción, Paraguay
| | | | - Mercedes A García
- Servicio de Reumatología, HIGA General San Martín, La Plata, Argentina
| | - Mary-Carmen Amigo
- Servicio de Reumatología, Centro Médico ABC, Ciudad de México, México
| | - Graciela Espada
- Servicio de Reumatología Infantil, Hospital de Niños Dr Ricardo Gutiérrez, Buenos Aires, Argentina
| | - Luis J Catoggio
- Sección de Reumatología, Servicio de Clínica Médica, Instituto Universitario, Escuela de Medicina, and Fundación Dr Pedro M Catoggio para el Progreso de la Reumatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Emilia Inoue Sato
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paul, Brazil
| | - Roger A Levy
- Discipline of Rheumatology, University of the State of Rio de Janeiro, Rio de Janeiro, Brasil
| | - Eduardo M Acevedo Vásquez
- Facultad de Medicina., Universidad Nacional Mayor de San Marcos. Servicio de Reumatología. Clínica San Felipe, J. María., Lima, Perú
| | - Rosa Chacón-Díaz
- Servicio de Reumatología, Policlínica Méndez Gimón, Caracas, Venezuela
| | | | | | | | - Oscar Neira
- Sección de Reumatología, Hospital del Salvador. Universidad de Chile. Unidad de Reumatología. Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo., Santiago, Chile
| | - Clóvis A Silva
- Pediatric Department, Faculdade de Medicina, Children's Institute, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Andrea Vargas Peña
- Clínica Reumatológica, Universidad de la República, and Unidad Docente Asistencial, Hospital Pasteur, Instituto Nacional de Reumatología., Montevideo, Uruguay
| | | | - Marina Scolnik
- Sección de Reumatología, Servicio de Clínica Médica, Instituto Universitario, Escuela de Medicina, and Fundación Dr Pedro M Catoggio para el Progreso de la Reumatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Guillermo J Pons-Estel
- Departamento de Medicina Interna, Grupo Oroño-Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - Michelle R Ugolini-Lopes
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Verónica Savio
- Servicio de Reumatología, Hospital Italiano de Córdoba, Córdoba, Argentina
| | - Cristina Drenkard
- Division of Rheumatology, Department of Medicine, Emory School of Medicine, Atlanta, Georgia, USA
| | | | - Manuel F Ugarte-Gil
- Servicio de Reumatología, Hospital General Guillermo Almenara Irigoyen, EsSalud., Lima, Perú
- Universidad Científica del Sur, Lima, Perú
| | - Alejandra Babini
- Servicio de Reumatología, Hospital Italiano de Córdoba, Córdoba, Argentina
| | - André Cavalcanti
- Serviço de Reumatologia do Hospital das Clínicas da Universidade Federal de Pernambuco (HC-UFPE), Recife, Brazil
| | - Fernanda Athayde Cardoso Linhares
- Clínica Reumatológica, Universidad de la República, and Unidad Docente Asistencial, Hospital Pasteur, Instituto Nacional de Reumatología., Montevideo, Uruguay
| | | | - Yurilis J Fuentes-Silva
- Unidad de Reumatología, Departamento de Medicina, Universidad de Oriente, Complejo Hospitalario Universitario Ruiz y Páez, Ciudad Bolívar, Venezuela
| | | | - Ruth M Eraso Garnica
- Departamento de Pediatría, Facultad de Medicina, Universidad de Antioquia, Hospital Pablo Tobón Uribe, Medellín, Colombia
| | - Sebastián Herrera Uribe
- Servicio de Reumatología, Hospital General de Medellín 'Luz Castro de Gutierrez' ESE, ARTMEDICA, Medellín, Colombia
| | - Diana Gómez-Martín
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Ciudad de México, Mexico
| | - Ricardo Robaina Sevrini
- Unidad de Enfermedades Autoinmunes Sistémicas, Facultad de Medicina, Clínica Médica 'C', Hospital de Clínicas, Universidad de la República, Montevideo, Uruguay
| | - Rosana M Quintana
- Departamento de Medicina Interna, Grupo Oroño-Centro Regional de Enfermedades Autoinmunes y Reumáticas (GO-CREAR), Rosario, Argentina
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - Sergio Gordon
- Unidad de Reumatología y Enfermedades Autoinmunes Sistémicas, HIGA Dr Oscar Alende, Mar del Plata, Argentina
| | - Hilda Fragoso-Loyo
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Ciudad de México, Mexico
| | - Violeta Rosario
- Servicio de Reumatología, Enfermedades Reumatológicas e Investigación Clínica (ERIC), Hospital Docente Padre Billini, Santo Domingo, Dominican Republic
| | - Verónica Saurit
- Servicio de Reumatología, Hospital Privado Universitario de Córdoba, Córdoba, Argentina
| | - Simone Appenzeller
- Departamento de Clínica Médica, Disciplina de Reumatologia, Faculdade de Ciências Medicas da UNICAMP, Universidade Estadual de Campinas, Campinas, Brazil
| | | | - Jorge Cieza
- Servicio de Reumatología, Departamento de Especialidades Médicas, Hospital Nacional Edgardo Rebagliati Martins, EsSalud., Lima, Perú
| | - Luis A González Naranjo
- Grupo de Inmunología Celular e Inmunogenética, Universidad de Antioquia, Hospital Universitario, Fundación San Vicente, Medellín, Colombia
| | | | - María Victoria Collado
- Servicio de Inmunología, Instituto de Investigaciones Médicas "Alfredo "Lanari", Ciudad Autónoma de Buenos Aires, Argentina
| | - Judith Sarano
- Servicio de Inmunología, Instituto de Investigaciones Médicas "Alfredo "Lanari", Ciudad Autónoma de Buenos Aires, Argentina
| | - Soledad Retamozo
- Servicio de Reumatología, Hospital Privado Universitario de Córdoba, Córdoba, Argentina
| | - María E Sattler
- Servicio de Reumatología, Hospital Escuela "Eva Perón", Granadero Baigorria, Argentina
| | - Rocio V Gamboa-Cárdenas
- Servicio de Reumatología, Hospital General Guillermo Almenara Irigoyen, EsSalud., Lima, Perú
| | - Ernesto Cairoli
- Unidad de Enfermedades Autoinmunes Sistémicas, Facultad de Medicina, Clínica Médica 'C', Hospital de Clínicas, Universidad de la República, Montevideo, Uruguay
| | - Silvana M Conti
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - Luis M Amezcua-Guerra
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Luis H Silveira
- Departamento de Reumatología, Instituto Nacional de Cardiología "Ignacio Chávez", Ciudad de México, México
| | - Eduardo F Borba
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Mariana A Pera
- Servicio de Reumatología, HIGA General San Martín, La Plata, Argentina
| | - Paula B Alba Moreyra
- Unidad de Reumatología, Cátedra de Clínica Médica I, Hospital Córdoba. Cátedra de Semiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba., Córdoba, Argentina
| | - Valeria Arturi
- Servicio de Reumatología, HIGA General San Martín, La Plata, Argentina
| | - Guillermo A Berbotto
- Servicio de Reumatología, Hospital Escuela "Eva Perón", Granadero Baigorria, Argentina
| | - Cristian Gerling
- Unidad de Reumatología y Enfermedades Autoinmunes Sistémicas, HIGA Dr Oscar Alende, Mar del Plata, Argentina
| | - Carla A Gobbi
- Unidad de Reumatología, Cátedra de Clínica Médica I, Hospital Córdoba. Cátedra de Semiología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba., Córdoba, Argentina
| | - Viviana L Gervasoni
- Servicio de Reumatología, Hospital Provincial de Rosario, Rosario, Argentina
| | - Hugo R Scherbarth
- Unidad de Reumatología y Enfermedades Autoinmunes Sistémicas, HIGA Dr Oscar Alende, Mar del Plata, Argentina
| | - João C Tavares Brenol
- Rheumatology Division, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernando Cavalcanti
- Serviço de Reumatologia do Hospital das Clínicas da Universidade Federal de Pernambuco (HC-UFPE), Recife, Brazil
| | - Lilian T Lavras Costallat
- Departamento de Clínica Médica, Disciplina de Reumatologia, Faculdade de Ciências Medicas da UNICAMP, Universidade Estadual de Campinas, Campinas, Brazil
| | - Nilzio A Da Silva
- Serviço de Reumatologia, Departamento de Clinica Medica, Faculdade de Medicina, Hospital das Clínicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Odirlei A Monticielo
- Rheumatology Division, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Luciana Parente Costa Seguro
- Rheumatology Division, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Ricardo M Xavier
- Rheumatology Division, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carolina Llanos
- Departamento de Inmunología Clínica y Reumatología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rubén A Montúfar Guardado
- Departamento de Reumatología, Consultorio de Especialidades del Instituto Salvadoreño de la Seguridad Social, San Salvador, El Salvador
| | | | - Carlos Pineda
- Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Ciudad de México, Mexico
| | | | - Alvaro Danza
- Grupo de Trabajo en Enfermedades Autoinmunes Sistémicas, Servicio de Clínica Médica, Facultad de Medicina, Universidad de la Republica, Hospital Pasteur, Administración de Servicios de Salud del Estado, Montevideo, Uruguay
| | - Marlene Guibert-Toledano
- Servicio Nacional de Reumatología, Centro de Investigaciones Médico Quirúrgicas (CIMEQ)., La Habana, Cuba
| | - Gil Llerena Reyes
- Servicio Nacional de Reumatología, Centro de Investigaciones Médico Quirúrgicas (CIMEQ)., La Habana, Cuba
| | - Maria Isabel Acosta Colman
- Departamento de Reumatología, Hospital de Clínicas, Facultad de Ciencias Médicas, Universidad Nacional de Asunción, Asunción, Paraguay
| | - Alicia M Aquino
- Departamento de Reumatología, Hospital de Clínicas, Facultad de Ciencias Médicas, Universidad Nacional de Asunción, Asunción, Paraguay
| | - Claudia S Mora-Trujillo
- Servicio de Reumatología, Departamento de Especialidades Médicas, Hospital Nacional Edgardo Rebagliati Martins, EsSalud., Lima, Perú
| | - Roberto Muñoz-Louis
- Servicio de Reumatología, Enfermedades Reumatológicas e Investigación Clínica (ERIC), Hospital Docente Padre Billini, Santo Domingo, Dominican Republic
| | | | - María Celeste Orozco
- Servicio de Reumatología, Instituto de Rehabilitación Psicofísica (IREP), Ciudad Autónoma de Buenos Aires, Argentina
| | - Paula I Burgos
- Departamento de Inmunología Clínica y Reumatología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Graciela V Betancur
- Servicio de Reumatología, Instituto de Rehabilitación Psicofísica (IREP), Ciudad Autónoma de Buenos Aires, Argentina
| | - Graciela S Alarcón
- Division of Clinical Immunology and Rheumatology, Department of Medicine, School of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Medicine, School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
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Lopez-Dominguez V, Quesada A, Guzmán-Mínguez JC, Moreno L, Lere M, Spottorno J, Giacomone F, Fernández JF, Hernando A, García MA. A simple vibrating sample magnetometer for macroscopic samples. Rev Sci Instrum 2018; 89:034707. [PMID: 29604780 DOI: 10.1063/1.5017708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We here present a simple model of a vibrating sample magnetometer (VSM). The system allows recording magnetization curves at room temperature with a resolution of the order of 0.01 emu and is appropriated for macroscopic samples. The setup can be mounted with different configurations depending on the requirements of the sample to be measured (mass, saturation magnetization, saturation field, etc.). We also include here examples of curves obtained with our setup and comparison curves measured with a standard commercial VSM that confirms the reliability of our device.
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Affiliation(s)
- V Lopez-Dominguez
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - A Quesada
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - J C Guzmán-Mínguez
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - L Moreno
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - M Lere
- Instituto de Investigación en Ciencia y Tecnología de Materiales, CONICET, Mar del Plata, Buenos Aires, Argentina
| | - J Spottorno
- Instituto de Magnetismo Aplicado-UCM-ADIF, Unidad Asociada CSIC, Madrid, Spain
| | - F Giacomone
- Instituto de Magnetismo Aplicado-UCM-ADIF, Unidad Asociada CSIC, Madrid, Spain
| | - J F Fernández
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - A Hernando
- Instituto de Magnetismo Aplicado-UCM-ADIF, Unidad Asociada CSIC, Madrid, Spain
| | - M A García
- Instituto de Cerámica y Vidrio-Consejo Superior de Investigaciones Científicas, Madrid, Spain
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21
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Ugarte-Gil MF, Wojdyla D, Pastor-Asurza CA, Gamboa-Cárdenas RV, Acevedo-Vásquez EM, Catoggio LJ, García MA, Bonfá E, Sato EI, Massardo L, Pascual-Ramos V, Barile LA, Reyes-Llerena G, Iglesias-Gamarra A, Molina-Restrepo JF, Chacón-Díaz R, Alarcón GS, Pons-Estel BA. Predictive factors of flares in systemic lupus erythematosus patients: data from a multiethnic Latin American cohort. Lupus 2017; 27:536-544. [PMID: 28857715 DOI: 10.1177/0961203317728810] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Purpose The purpose of this paper is to determine the factors predictive of flares in systemic lupus erythematosus (SLE) patients. Methods A case-control study nested within the Grupo Latino Americano De Estudio de Lupus (GLADEL) cohort was conducted. Flare was defined as an increase ≥4 points in the SLEDAI. Cases were defined as patients with at least one flare. Controls were selected by matching cases by length of follow-up. Demographic and clinical manifestations were systematically recorded by a common protocol. Glucocorticoid use was recorded as average daily dose of prednisone and antimalarial use as percentage of time on antimalarial and categorized as never (0%), rarely (>0-25%), occasionally (>25%-50%), commonly (˃50%-75%) and frequently (˃75%). Immunosuppressive drugs were recorded as used or not used. The association between demographic, clinical manifestations, therapy and flares was examined using univariable and multivariable conditional logistic regression models. Results A total of 465 cases and controls were included. Mean age at diagnosis among cases and controls was 27.5 vs 29.9 years, p = 0.003; gender and ethnic distributions were comparable among both groups and so was the baseline SLEDAI. Independent factors protective of flares identified by multivariable analysis were older age at diagnosis (OR = 0.929 per every five years, 95% CI 0.869-0.975; p = 0.004) and antimalarial use (frequently vs never, OR = 0.722, 95% CI 0.522-0.998; p = 0.049) whereas azathioprine use (OR = 1.820, 95% CI 1.309-2.531; p < 0.001) and SLEDAI post-baseline were predictive of them (OR = 1.034, 95% CI 1.005-1.064; p = 0.022). Conclusions In this large, longitudinal Latin American cohort, older age at diagnosis and more frequent antimalarial use were protective whereas azathioprine use and higher disease activity were predictive of flares.
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Affiliation(s)
- M F Ugarte-Gil
- 1 Hospital Guillermo Almenara Irigoyen, EsSalud, Lima, Perú.,2 Universidad Científica del Sur, Lima, Perú
| | - D Wojdyla
- 3 Universidad Nacional de Rosario, Rosario, Argentina
| | - C A Pastor-Asurza
- 1 Hospital Guillermo Almenara Irigoyen, EsSalud, Lima, Perú.,4 Universidad Nacional Mayor de San Marcos, Lima, Perú
| | | | - E M Acevedo-Vásquez
- 1 Hospital Guillermo Almenara Irigoyen, EsSalud, Lima, Perú.,4 Universidad Nacional Mayor de San Marcos, Lima, Perú
| | - L J Catoggio
- 5 Sección de Reumatología, Servicio de Clínica Médica, Hospital Italiano, Instituto Universitario Escuela de Medicina Hospital Italiano and Fundación Dr. Pedro M. Catoggio para el Progreso de la Reumatología, Buenos Aires, Argentina
| | - M A García
- 6 Hospital Interzonal General de Agudos "General San Martín," La Plata, Argentina
| | - E Bonfá
- 7 Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - E I Sato
- 8 Disciplina de Reumatología, Escola Paulista de Medicina, Universidade Federal da São Paulo-UNIFESP, São Paulo, Brazil
| | - L Massardo
- 9 Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - V Pascual-Ramos
- 10 Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán," Ciudad de Mexico, Mexico
| | - L A Barile
- 11 Hospital de Especialidades Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de Mexico, Mexico
| | - G Reyes-Llerena
- 12 Centro de Investigaciones Médico Quirúrgicas-CIMEQ, Habana, Cuba
| | | | | | - R Chacón-Díaz
- 15 Servicio de Reumatología, Centro Nacional de Enfermedades Reumáticas, Hospital Universitario de Caracas, Caracas, Venezuela
| | - G S Alarcón
- 16 Department of Medicine, Division of Clinical Immunology and Rheumatology, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
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Lopez-Dominguez V, de la Presa P, Hernando A, García MA. Note: On the study of metal/oxide hybrid ferromagnets with magneto-optical techniques. Rev Sci Instrum 2017; 88:086102. [PMID: 28863633 DOI: 10.1063/1.4996779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We analyze here the magneto-optical measurements of hybrid materials containing metallic and oxide ferromagnetic phases. We show that the magnetization curves obtained with this technique can be fairly different to those obtained with standard magnetometry techniques and cannot be representative of the contribution of each phase to the magnetization of the material, due to the very different optical properties of metals and oxides. However, a proper numerical analysis of the magneto-optical measurements allows estimating the fraction of each phase present in the material.
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Affiliation(s)
| | - P de la Presa
- Instituto de Magnetismo Aplicado UCM-ADIF-CSIC, Madrid, Spain
| | - A Hernando
- Instituto de Magnetismo Aplicado UCM-ADIF-CSIC, Madrid, Spain
| | - M A García
- Instituto de Cerámica y Vidrio, CSIC, Madrid, Spain
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23
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Alarcón-Riquelme ME, Ziegler JT, Molineros J, Howard TD, Moreno-Estrada A, Sánchez-Rodríguez E, Ainsworth HC, Ortiz-Tello P, Comeau ME, Rasmussen A, Kelly JA, Adler A, Acevedo-Vázquez EM, Cucho-Venegas JM, García-De la Torre I, Cardiel MH, Miranda P, Catoggio LJ, Maradiaga-Ceceña M, Gaffney PM, Vyse TJ, Criswell LA, Tsao BP, Sivils KL, Bae SC, James JA, Kimberly RP, Kaufman KM, Harley JB, Esquivel-Valerio JA, Moctezuma JF, García MA, Berbotto GA, Babini AM, Scherbarth H, Toloza S, Baca V, Nath SK, Aguilar Salinas C, Orozco L, Tusié-Luna T, Zidovetzki R, Pons-Estel BA, Langefeld CD, Jacob CO. Genome-Wide Association Study in an Amerindian Ancestry Population Reveals Novel Systemic Lupus Erythematosus Risk Loci and the Role of European Admixture. Arthritis Rheumatol 2016; 68:932-43. [PMID: 26606652 DOI: 10.1002/art.39504] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 11/03/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Systemic lupus erythematosus (SLE) is a chronic autoimmune disease with a strong genetic component. We undertook the present work to perform the first genome-wide association study on individuals from the Americas who are enriched for Native American heritage. METHODS We analyzed 3,710 individuals from the US and 4 countries of Latin America who were diagnosed as having SLE, and healthy controls. Samples were genotyped with HumanOmni1 BeadChip. Data on out-of-study controls genotyped with HumanOmni2.5 were also included. Statistical analyses were performed using SNPtest and SNPGWA. Data were adjusted for genomic control and false discovery rate. Imputation was performed using Impute2 and, for classic HLA alleles, HiBag. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated. RESULTS The IRF5-TNPO3 region showed the strongest association and largest OR for SLE (rs10488631: genomic control-adjusted P [Pgcadj ] = 2.61 × 10(-29), OR 2.12 [95% CI 1.88-2.39]), followed by HLA class II on the DQA2-DQB1 loci (rs9275572: Pgcadj = 1.11 × 10(-16), OR 1.62 [95% CI 1.46-1.80] and rs9271366: Pgcadj = 6.46 × 10(-12), OR 2.06 [95% CI 1.71-2.50]). Other known SLE loci found to be associated in this population were ITGAM, STAT4, TNIP1, NCF2, and IRAK1. We identified a novel locus on 10q24.33 (rs4917385: Pgcadj = 1.39 × 10(-8)) with an expression quantitative trait locus (eQTL) effect (Peqtl = 8.0 × 10(-37) at USMG5/miR1307), and several new suggestive loci. SLE risk loci previously identified in Europeans and Asians were corroborated. Local ancestry estimation showed that the HLA allele risk contribution is of European ancestral origin. Imputation of HLA alleles suggested that autochthonous Native American haplotypes provide protection against development of SLE. CONCLUSION Our results demonstrate that studying admixed populations provides new insights in the delineation of the genetic architecture that underlies autoimmune and complex diseases.
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Affiliation(s)
| | - Julie T Ziegler
- Wake Forest School of Medicine, Winston-Salem, North Carolina
| | | | | | - Andrés Moreno-Estrada
- Stanford University School of Medicine, Stanford, California, and Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Irapuato, Mexico
| | | | | | - Patricia Ortiz-Tello
- Stanford University School of Medicine, Stanford, California, and Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Irapuato, Mexico
| | - Mary E Comeau
- Wake Forest School of Medicine, Winston-Salem, North Carolina
| | | | | | - Adam Adler
- Oklahoma Medical Research Foundation, Oklahoma City
| | | | | | | | | | | | | | | | | | | | | | | | | | - Sang-Cheol Bae
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
| | - Judith A James
- Oklahoma Medical Research Foundation and University of Oklahoma Health Sciences Center, Oklahoma City
| | | | | | - John B Harley
- Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Jorge A Esquivel-Valerio
- Hospital Universitario Dr. José Eleuterio González Universidad Autonoma de Nuevo León, Monterrey, Mexico
| | | | - Mercedes A García
- Hospital Interzonal General de Agudos General San Martin, La Plata, Argentina
| | | | | | - Hugo Scherbarth
- Hospital Interzonal General de Agudos Oscar E. Alende, Mar del Plata, Argentina
| | - Sergio Toloza
- Hospital Interzonal San Juan Bautista, San Fernando del Valle de Catamarca, Argentina
| | - Vicente Baca
- Hospital de Peditaria, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Carlos Aguilar Salinas
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Lorena Orozco
- Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | - Teresa Tusié-Luna
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán and Instituto de Investigaciones Biomédicas de la Universidad Nacional Autónoma de México, Mexico City, Mexico
| | | | | | | | - Chaim O Jacob
- University of Southern California School of Medicine, Los Angeles
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García MA, Alonso J, Melgar MJ. Radiocaesium activity concentrations in macrofungi from Galicia (NW Spain): Influence of environmental and genetic factors. Ecotoxicol Environ Saf 2015; 115:152-158. [PMID: 25700093 DOI: 10.1016/j.ecoenv.2015.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 09/03/2014] [Revised: 01/30/2015] [Accepted: 02/04/2015] [Indexed: 06/04/2023]
Abstract
Radiocaesium ((137)Cs) is an artificial radionuclide that can be captured from the soil through the mycelium of fungi. However, in Spain there are few data on its presence in edible mushrooms. (137)Cs activity concentrations were determined using 54 samples of wild and cultivated mushrooms and 18 samples of soil, all of them collected in Galicia (NW Spain) during 2010. Samples were analyzed by gamma spectroscopy with a High-Purity Germanium (HPGe) detector. The average activity concentration of (137)Cs in wild mushrooms was 249.2Bqkg(-1) dry weight (dw) and about 24.9Bqkg(-1) fresh weight (fw). Genetic factors (species) influenced the uptake of (137)Cs, highlighting Hydnum repandum as the greatest accumulator of all wild species (1016.4Bqkg(-1) dw), while cultivated species showed much lower levels (1.6Bqkg(-1) fw). Accumulation was also favored by fungal mycorrhizal ecology, whose mycelium was distributed in contaminated soil horizons. The mean levels detected in soils were 14Bqkg(-1) fw. Although some species behaved as bioexclusors of radiocaesium, the transfer factors (TF) suggest that mushrooms preferentially bioaccumulate (137)Cs. No sample reached the limit of 600Bqkg(-1) fw (about 6000Bqkg(-1) dw) indicated in the European legislation. In conclusion, the consumption of mushrooms harvested from the investigated areas poses no toxicological risk to human health due to radiocaesium.
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Affiliation(s)
- M A García
- Department of Toxicology, Faculty of Veterinary Science. University of Santiago de Compostela, 27002 Lugo, Spain
| | - J Alonso
- Department of Toxicology, Faculty of Veterinary Science. University of Santiago de Compostela, 27002 Lugo, Spain; Centro Tecnológico Agroalimentario de Lugo (CETAL), 27002 Lugo, Spain
| | - M J Melgar
- Department of Toxicology, Faculty of Veterinary Science. University of Santiago de Compostela, 27002 Lugo, Spain.
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García-Rubiño ME, Conejo-García A, Núñez MC, Carrasco E, García MA, Choquesillo-Lazarte D, García-Ruiz JM, Gallo MA, Marchal JA, Campos JM. Enantiospecific synthesis of heterocycles linked to purines: different apoptosis modulation of enantiomers in breast cancer cells. Curr Med Chem 2014; 20:4924-34. [PMID: 24059234 DOI: 10.2174/09298673113206660263] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Revised: 06/17/2013] [Accepted: 09/10/2013] [Indexed: 11/22/2022]
Abstract
The issue of chiral drug is now a major theme in the design, discovery and development of new drugs. It has been shown for many pharmaceuticals that only one enantiomer contains the desired activity, and the synthesis of such drug molecules in their optically pure form is becoming increasingly important. Mitsunobu reaction was carried out between (R)- and (S)-3,4-dihydro-2H-1,5-benzoxathiepin-3-ol and purines under microwave irradiation. A contraction into a six-membered ring takes place with concomitant inversion at the stereocentre with excellent enatiomeric excesses giving rise to the homochiral 9-(2,3-dihydro-1,4-benzoxathiin-3-ylmethyl)-9H-purines. The anti-tumour activity of all enantiomers is reported against the caspase-3-deficient MCF-7 and the wild type SKBR-3 human breast cancer cells. The most active homochiral compound displays an IC50 of 1.85 μM and induces inhibition of the translation initiation factor eIF2α. All homochiral compounds included in this study show different apoptotic effects between both enantiomers with levels up to 99%. We have analyzed caspase-mediated apoptotic pathways on enantiomers and racemates. We have found a homochiral derivative that activates the canonical intrinsic caspase-8/caspase-3 apoptotic pathway on the MCF-7 cells, and a racemic compound that induces caspase-2 activation. Moreover, we demonstrate the involvement of caspase activation during cell death induced by these compounds in SKBR-3 cells.
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Affiliation(s)
- M E García-Rubiño
- Departamento de Química Farmacéutica y Orgánica, Facultad de Farmacia, c/ Campus de Cartuja, s/n, 18071 Granada, Spain.
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Muñoz Noval A, García R, Ruiz Casas D, Losada Bayo D, Sánchez Vaquero V, Torres Costa V, Martín Palma RJ, García MA, García Ruiz JP, Serrano Olmedo JJ, Muñoz Negrete JF, del Pozo Guerrero F, Manso Silván M. Design and characterization of biofunctional magnetic porous silicon flakes. Acta Biomater 2013; 9:6169-76. [PMID: 23237987 DOI: 10.1016/j.actbio.2012.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 10/12/2012] [Accepted: 12/05/2012] [Indexed: 11/27/2022]
Abstract
Magnetic porous silicon flakes (MPSF) were obtained from mesoporous silicon layers formed by multi-step anodization and subsequent composite formation with Fe oxide nanoparticles by thermal annealing. The magnetic nanoparticles adhered to the surface and penetrated inside the pores. Their structure evolved as a result of the annealing treatments derived from X-ray diffraction and X-ray absorption analyses. Moreover, by tailoring the magnetic load, the dynamic and hydrodynamic properties of the particles were controlled, as observed by the pressure displayed against a sensor probe. Preliminary functionality experiments were performed using an eye model, seeking potential use of MPSF as reinforcement for restored detached retina. It was observed that optimal flake immobilization is obtained when the MPSF reach values of magnetic saturation >10(-4)Am(2)g(-1). Furthermore, the MPSF were demonstrated to be preliminarily biocompatible in vitro. Moreover, New Zealand rabbit in vivo models demonstrated their short-term histocompatibility and their magnetic functionality as retina pressure actuators.
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Affiliation(s)
- A Muñoz Noval
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, Madrid, Spain.
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Serrano A, Rodríguez de la Fuente O, Collado V, Rubio-Zuazo J, Monton C, Castro GR, García MA. Simultaneous surface plasmon resonance and x-ray absorption spectroscopy. Rev Sci Instrum 2012; 83:083101. [PMID: 22938268 DOI: 10.1063/1.4739773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present an experimental setup for the simultaneous measurement of surface plasmon resonance (SPR) and x-ray absorption spectroscopy (XAS) on metallic thin films at a synchrotron beamline. The system allows measuring in situ and in real time the effect of x-ray irradiation on the SPR curves to explore the interaction of x-rays with matter. It is also possible to record XAS spectra while exciting SPR in order to study changes in the films induced by the excitation of surface plasmons. Combined experiments recording simultaneously SPR and XAS curves while scanning different parameters can be also carried out. The relative variations in the SPR and XAS spectra that can be detected with this setup range from 10(-3) to 10(-5), depending on the particular experiment.
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Affiliation(s)
- A Serrano
- Instituto de Cerámica y Vidrio (ICV-CSIC), Cantoblanco, 28049 Madrid, Spain.
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Koo M, Sabaté A, Magalló P, García MA, Domínguez J, de Lama ME, López S. [Multidisciplinary protocol for computed tomography imaging and angiographic embolization of splenic injury due to trauma: assessment of pre-protocol and post-protocol outcomes]. Rev Esp Anestesiol Reanim 2011; 58:538-542. [PMID: 22279872 DOI: 10.1016/s0034-9356(11)70137-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVES To assess conservative treatment of splenic injury due to trauma, following a protocol for computed tomography (CT) and angiographic embolization. To quantify the predictive value of CT for detecting bleeding and need for embolization. MATERIAL AND METHODS The care protocol developed by the multidisciplinary team consisted of angiography with embolization of lesions revealed by contrast extravasation under CT as well as embolization of grade III-V injuries observed, or grade I-II injuries causing hemodynamic instability and/or need for blood transfusion. We collected data on demographic variables, injury severity score (ISS), angiographic findings, and injuries revealed by CT. Pre-protocol and post-protocol outcomes were compared. The sensitivity and specificity of CT findings were calculated for all patients who required angiographic embolization. RESULTS Forty-four and 30 angiographies were performed in the pre- and post-protocol periods, respectively. The mean (SD) ISSs in the two periods were 25 (11) and 26 (12), respectively. A total of 24 (54%) embolizations were performed in the pre-protocol period and 28 (98%) after implementation of the protocol. Two and 7 embolizations involved the spleen in the 2 periods, respectively; abdominal laparotomies numbered 32 and 25, respectively, and 10 (31%) vs 4 (16%) splenectomies were performed. The specificity and sensitivity values for contrast extravasation found on CT and followed by embolization were 77.7% and 79.5%. CONCLUSIONS The implementation of this multidisciplinary protocol using CT imaging and angiographic embolization led to a decrease in the number of splenectomies. The protocol allows us to take a more conservative treatment approach.
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Affiliation(s)
- M Koo
- Servicio de Anestesiología y Reanimación, Hospital Universitari de Bellvitge, Idibell, Barcelona.
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Gómez-Benito M, Conchillo A, García MA, Vázquez I, Maicas M, Vicente C, Cristobal I, Marcotegui N, García-Ortí L, Bandrés E, Calasanz MJ, Alonso MM, Odero MD. EVI1 controls proliferation in acute myeloid leukaemia through modulation of miR-1-2. Br J Cancer 2010; 103:1292-6. [PMID: 20842122 PMCID: PMC2967053 DOI: 10.1038/sj.bjc.6605874] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [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] [Indexed: 01/04/2023] Open
Abstract
Bakground: The EVI1(ecotropic virus integration site 1) gene codes for a zinc-finger transcription factor, whose transcriptional activation leads to a particularly aggressive form of acute myeloid leukaemia (AML). Although, EVI1 interactions with key proteins in hematopoiesis have been previously described, the precise role of this transcription factor in promoting leukaemic transformation is not completely understood. Recent works have identified specific microRNA (miRNA) signatures in different AML subgroups. However, there is no analysis of miRNAs profiles associated with EVI1 overexpression in humans. Methods: We performed QT-RT–PCR to assess the expression of 250 miRNAs in cell lines with or without EVI1 overexpression and in patient samples. We used ChIP assays to evaluated the possible binding of EVI1 binding to the putative miRNA promoter. Proliferation of the different cell lines transfected with the anti- or pre-miRs was quantified by MTT. Results: Our data showed that EVI1 expression was significantly correlated with the expression of miR-1-2 and miR-133-a-1 in established cell lines and in patient samples. ChIP assays confirmed that EVI1 binds directly to the promoter of these two miRNAs. However, only miR-1-2 was involved in abnormal proliferation in EVI1 expressing cell lines. Conclusions: Our data showed that EVI1 controls proliferation in AML through modulation of miR-1-2. This study contributes to further understand the transcriptional networks involving transcription factors and miRNAs in AML.
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Affiliation(s)
- M Gómez-Benito
- Division of Oncology, Center for Applied Medical Research, University of Navarra, Navarra, Pamplona 31008, Spain
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Pons-Estel BA, Sánchez-Guerrero J, Romero-Díaz J, Iglesias-Gamarra A, Bonfa E, Borba EF, Shinjo SK, Bernatsky S, Clarke A, García MA, Marcos JC, Duarte A, Berbotto GA, Scherbarth H, Marques CD, Onetti L, Saurit V, Souza AWS, Velozo E, Catoggio LJ, Neira O, Burgos PI, Ramirez LA, Molina JF, De La Torre IG, Silvariño R, Manni JA, Durán-Barragán S, Vilá LM, Fortin PR, Calvo-Alén J, Santos MJ, Portela M, Esteva-Spinetti MH, Weisman M, Acevedo EM, Segami MI, Gentiletti SB, Roldán J, Navarro I, Gonzalez E, Liu JM, Karlson EW, Costenbader KH, Wolfe F, Alarcón GS. Validation of the Spanish, Portuguese and French versions of the Lupus Damage Index questionnaire: data from North and South America, Spain and Portugal. Lupus 2010; 18:1033-52. [PMID: 19762375 DOI: 10.1177/0961203309105590] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We have previously developed and validated a self-administered questionnaire, modelled after the Systemic Lupus International Collaborating Clinics Damage Index (SDI), the Lupus Damage Index Questionnaire (LDIQ), which may allow the ascertainment of this construct in systemic lupus erythematosus (SLE) patients followed in the community and thus expand observations made about damage. We have now translated, back-translated and adapted the LDIQ to Spanish, Portuguese and French and applied it to patients followed at academic and non-academic centres in North and South America, Portugal and Spain while their physicians scored the SDI. A total of 887 patients (659 Spanish-speaking, 140 Portuguese-speaking and 80 French-speaking patients) and 40 physicians participated. Overall, patients scored all LDIQ versions higher than their physicians (total score and all domains). Infrequent manifestations had less optimal clinimetric properties but overall agreement was more than 95% for the majority of items. Higher correlations were observed among the Spanish-speaking patients than the Portuguese-speaking and French-speaking patients; further adjustments may be needed before the Portuguese and French versions of the LDIQ are applied in community-based studies. The relationship between the LDIQ and other outcome parameters is currently being investigated in a different patient sample.
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Affiliation(s)
- B A Pons-Estel
- Grupo Latíno Americano de Estudio de Lupus or Latin America Group for the Study of Lupus, Rosario, Argentina
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Bellomio V, Spindler A, Lucero E, Berman A, Sueldo R, Berman H, Santana M, Molina MJ, Góngora V, Cassano G, Paira S, Saurit V, Retamozo S, Retamozo G, Alvarellos A, Caerio F, Alba P, Gotero M, Velozo EJ, Ceballos F, Soriano E, Catoggio L, García MA, Eimon A, Agüero S. Metabolic syndrome in Argentinean patients with systemic lupus erythematosus. Lupus 2010; 18:1019-25. [PMID: 19762406 DOI: 10.1177/0961203309105876] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The objective was to determine the prevalence of the metabolic syndrome (MS) in patients with systemic lupus erythematosus (SLE) in Argentina, to assess the factors associated to it, and to compare the results with a control group with non-inflammatory disorders. The study included 147 patients with SLE and 119 controls. MS was defined according to criteria by the American Heart Association/National Heart, Lung, and Blood Institute (AHA/NHLBI) Scientific Statement. Demographic characteristics, Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) and Systemic Lupus International Collaborating Clinics/ACR Damage Index (SDI) were assessed as well as administration, maximum dose and cumulative dose of prednisone and hydroxychloroquine (HCQ). MS prevalence was 28.6% (CI 95%: 21.4-36.6) in patients with SLE and 16% in controls (P = 0.0019). Patients with SLE presented higher arterial hypertension frequency compared with controls (43 vs 25%, P = 0.007). When comparing lupus patients with MS (n = 41) and without MS (n = 106), no significant differences were observed regarding duration of the disease, SLEDAI or cumulative prednisone dose. Cumulative damage was associated independently with MS (OR 1.98; P = 0.021), whereas HCQ use was found to be protective (OR 0.13; P = 0.015). Patients with lupus presented higher MS prevalence than controls with non-inflammatory disorders, and occurrence of arterial hypertension was also higher. MS was associated with cumulative damage; the use of HCQ showed to be protective against presence of MS.
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Affiliation(s)
- V Bellomio
- Servicio de Reumatología, Hospital Angel Padilla, Universidad Nacional de Tucumán, Tucumán, Argentina
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Spindler BA, Lucero E, Berman A, Sueldo R, Berman H, Santana M, Molina MJ, Góngora V, Cassano G, Paira S, Saurit V, Retamozo S, Alvarellos A, Caerio F, Alba P, Gotero M, Velozo EJ, Ceballos F, Soriano E, Catoggio L, García MA, Eimon A, Agüero S. Metabolic syndrome in Argentinean patients with systemic lupus erythematosus. Lupus 2009; 24:e3. [PMID: 20026520 DOI: 10.1177/0961203309358481] [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: 11/15/2022]
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de la Venta J, Bouzas V, Pucci A, Laguna-Marco MA, Haskel D, te Velthuis SGE, Hoffmann A, Lal J, Bleuel M, Ruggeri G, de Julián Fernández C, García MA. X-ray magnetic circular dichroism and small angle neutron scattering studies of thiol capped gold nanoparticles. J Nanosci Nanotechnol 2009; 9:6434-6438. [PMID: 19908546 DOI: 10.1166/jnn.2009.1877] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
X-ray magnetic circular dichroism (XMCD) and Small Angle Neutron Scattering (SANS) measurements were performed on thiol capped Au nanoparticles (NPs) embedded into polyethylene. An XMCD signal of 0.8 x 10(-4) was found at the Au L3 edge of thiol capped Au NPs embedded in a polyethylene matrix for which Superconducting Quantum Interference Device (SQUID) magnetometry yielded a saturation magnetization, M(S), of 0.06 emu/g(Au). SANS measurements showed that the 3.2 nm average-diameter nanoparticles are 28% polydispersed, but no detectable SANS magnetic signal was found with the resolution and sensitivity accessible with the neutron experiment. A comparison with previous experiments carried out on Au NPs and multilayers, yield to different values between XMCD signals and magnetization measured by SQUID magnetometer. We discuss the origin of those differences.
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Affiliation(s)
- J de la Venta
- Dpto. Fisica de Materiales, Universidad Complutense de Madrid, 28040 Madrid, Spain
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Melgar MJ, Alonso J, García MA. Mercury in edible mushrooms and underlying soil: bioconcentration factors and toxicological risk. Sci Total Environ 2009; 407:5328-34. [PMID: 19631362 DOI: 10.1016/j.scitotenv.2009.07.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Revised: 06/30/2009] [Accepted: 07/02/2009] [Indexed: 05/08/2023]
Abstract
Wild growing mushrooms are a popular delicacy in many countries, but some species accumulate high levels of toxic heavy metals, e.g., mercury, both in unpolluted and mildly polluted areas. In this study, we examined the accumulation capacity of mercury in edible mushrooms in relation to certain factors and their possible toxicological implications. Total concentrations of mercury were determined by an anodic stripping voltammetric technique using a gold disc as the working electrode in 238 samples of the fruiting bodies of 28 wild growing edible mushrooms species and the underlying soil. The mushrooms were collected from different sites in the province of Lugo (NW Spain). The hymenophore (H) and the rest of the fruiting body (RFB) were analysed separately. The highest mean mercury concentrations (mg/kg dry weight) were found in Boletus pinophilus (6.9 in H and 4.5 in RFB), Agaricus macrosporus (5.1 in H and 3.7 in RFB), Lepista nuda (5.1 in H and 3.1 in RFB) and Boletus aereus (4.6 in H and 3.3 in RFB), while the lowest was found in Agrocybe cylindrica (0.34 in H and 0.26 in RFB) and Fistulina hepatica (0.30 in H and 0.22 in RFB). All mushroom species accumulated mercury (BCF>1) in relation to the underlying soils. There were no statistically significant differences between the mercury levels in the hymenophore and in the rest of the fruiting body. The total mercury concentrations were compared to data in the literature and to levels set by legislation. It was concluded that consumption of the majority of the studied mushrooms is not a toxicological risk as far as mercury content is concerned, although the species B.pinophilus, A.macrosporus, L.nuda and B.aereus should be consumed in low amounts.
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Affiliation(s)
- M J Melgar
- Department of Toxicology, Faculty of Veterinary Medicine, University of Santiago de Compostela, 27002-Lugo, Spain.
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Ramírez Gómez LA, Uribe Uribe O, Osio Uribe O, Grisales Romero H, Cardiel MH, Wojdyla D, Pons-Estel BA, Catoggio LJ, Soriano ER, Imamura PM, Manni JA, Grimaudo S, Sarano J, Maldonado-Cocco JA, Arriola MS, Gómez G, García MA, Marcos AI, Marcos JC, Scherbarth HR, Marino PC, Motta EL, Drenkard C, Gamron S, Buliubasich S, Onetti CM, Caeiro F, Alvarellos A, Saurit V, Gentiletti S, Quagliatto N, Gentiletti AA, Machado D, Abdala M, Palatnik S, Berbotto GA, Battagliotti CA, Sato E, Sella EMC, Souza AS, Costallat LTL, Bertolo MB, Coimbra IB, Borba Neto EF, Bonfá E, Tavares JC, Brenol, Xavier R, Mucenic T, Cavalcanti FDS, Duarte ALB, Marques CDL, Da Silva NA, de O e Silva AC, Pacheco TF, Molina-Restrepo JF, Molina-López J, Iglesias-Gamarra A, Iglesias-Rodríguez A, Egea-Bermejo E, Guzmán-Moreno RA, Restrepo-Suárez JF, Guibert-Toledano M, Reyes-Llerena GA, Massardo L, Gareca N, Jacobelli S, Neira OJ, Guzmán LR, Garcia-Kutzbach A, Castellanos C, Cajas E, Pascual-Ramos V, Barile-Fabris LA, Miranda-Limón JM, Amigo MC, Silveira LH, De La Torre IG, Orozco-Barocio G, Estrada-Contreras ML, del Pozo MJS, Aranda Baca LE, Quezada AU, Huerta-Yáñez GF, Acevedo-Vásquez EM, Alfaro-Lozano JL, Cucho-Venegas JM, Segami MI, Chung CP, Alva-Linares M, Abadi I, Chacón-Díaz R, Al Snih Al Snih S, Esteva-Spinetti MH, Vivas J. Childhood systemic lupus erythematosus in Latin America. The GLADEL experience in 230 children. Lupus 2008; 17:596-604. [PMID: 18539716 DOI: 10.1177/0961203307088006] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To evaluate disease characteristics of childhood onset SLE in Latin America and to compare this information with an adult population in the same cohort of GLADEL. A protocol was designed as a multicenter, multinational, inception cohort of lupus patients to evaluate demographic, clinical, laboratory and serological variables, as well as classification criteria, disease activity, organ damage and mortality. Descriptive statistics, chi square, Fisher's exact test, Student's t test and multiple logistic regression were used to compare childhood and adult onset SLE. 230 patients were <18 years and 884 were adult SLE patients. Malar rash, fever, oral ulcers, thrombocytopenia and hemolytic anemia and some neurologic manifestations were more prevalent in children (p<0.05). On the other hand, myalgias, Sjögren's syndrome and cranial nerve involvement were more frequently seen in adults (p<0.05). Afro-Latin-American children had a higher prevalence of fever, thrombocytopenia and hemolytic anemia. White and mestizo children had a higher prevalence of malar rash. Mestizo children had a higher prevalence of cerebrovascular disease and cranial nerve involvement. Children met SLE ACR criteria earlier with higher mean values than adults (p: 0.001). They also had higher disease activity scores (p: 0.01), whereas adults had greater disease damage (p: 0.02). In Latin America, childhood onset SLE seems to be a more severe disease than adults. Some differences can be detected among ethnic groups.
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Affiliation(s)
- L A Ramírez Gómez
- Sección de Reumatología, Universidad de Antioquia, Hospital Universitario San Vicente de Paúl. Medellín, Colombia.
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Guerrero E, Muñoz-Márquez MA, García MA, Crespo P, Fernández-Pinel E, Hernando A, Fernández A. Surface plasmon resonance and magnetism of thiol-capped gold nanoparticles. Nanotechnology 2008; 19:175701. [PMID: 21825680 DOI: 10.1088/0957-4484/19/17/175701] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Surface plasmon resonance measurements and magnetic characterization studies have been carried out for two types of thiol-capped gold nanoparticles (NPs) with similar diameters between 2.0 and 2.5 nm and different organic molecules linked to the sulfur atom: dodecanethiol and tiopronin. In addition, Au NPs capped with tetraoctyl ammonium bromide have also been included in the investigation since such capping molecules weakly interact with the gold surface atoms and, therefore, this system can be used as a model for naked gold NPs; such particles presented a bimodal size distribution with diameters around 1.5 and 5 nm. The plasmon resonance is non-existent for tiopronin-capped NPs, whereas a trace of such a feature is observed for NPs covered with dodecanethiol molecules and a bulk-like feature is measured for NPs capped with tetralkyl ammonium salts. These differences would indicate that the modification of the surface electronic structure of the Au NPs depends on the geometry and self-assembling capabilities of the capping molecules and on the electric charge transferred between Au and S atoms. Regarding the magnetization, dodecanethiol-capped NPs have a ferromagnetic-like behaviour, while the NPs capped with tiopronin exhibit a paramagnetic behaviour and tetralkyl ammonium-protected NPs are diamagnetic across the studied temperature range; straight chains with a well-defined symmetry axis can induce orbital momentum on surface electrons close to the binding atoms. The orbital momentum not only contributes to the magnetization but also to the local anisotropy, giving rise to permanent magnetism. Due to the domain structure of the adsorbed molecules, orbital momentum is not induced for tiopronin-capped NPs and the charge transfer only induces a paramagnetic spin component.
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Affiliation(s)
- E Guerrero
- Instituto de Ciencia de Materiales de Sevilla, CSIC-US, Avenida Américo Vespucio 49, E-41092 Sevilla, Spain
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Pérez-Buitrago N, García MA, Sabat A, Delgado J, Álvarez A, Mcmillan O, Funk SM. Do headstart programs work? Survival and body condition in headstarted Mona Island iguanas Cyclura cornuta stejnegeri. ENDANGER SPECIES RES 2008. [DOI: 10.3354/esr00130] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Melgar MJ, Alonso J, García MA. Removal of toxic metals from aqueous solutions by fungal biomass of Agaricus macrosporus. Sci Total Environ 2007; 385:12-9. [PMID: 17692896 DOI: 10.1016/j.scitotenv.2007.07.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 07/03/2007] [Accepted: 07/09/2007] [Indexed: 05/16/2023]
Abstract
Fungi such as Agaricus macrosporus show potential for the removal of heavy metals from aqueous solutions contaminated by zinc, copper, mercury, cadmium or lead. This study investigated biosorption of these metals by living or non-living biomass of A. macrosporus from an acid solution, an acid solution supplemented with potassium and phosphorus, and an alkaline solution. Uptake showed a pH-dependent profile. Maximum percentage uptake of all metals was found to occur at alkaline pH (Cu 96%, Pb 89%). With living biomass, metal biosorption was greater and faster in K/P-supplemented acid medium than in non-supplemented acid medium, with equilibrium reached within 15 min for all metals, and the highest percentage uptake being of cadmium (96%). In general, the greatest differences in biosorption capacity were seen for living biomass, between supplemented and non-supplemented acid medium; the smallest differences were between living and dead biomass in alkaline medium. These results support the potential utility of A. macrosporus for heavy metal removal.
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Affiliation(s)
- M J Melgar
- Departamento de Toxicología, Facultad de Veterinaria, Universidad de Santiago de Compostela, C/ Carvalho Calero s/n, 27002-Lugo, Spain.
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Baños-Capilla MC, García MA, Bea J, Pla C, Larrea L, López E. PET/CT image registration: Preliminary tests for its application to clinical dosimetry in radiotherapy. Med Phys 2007; 34:1911-7. [PMID: 17654893 DOI: 10.1118/1.2732031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The quality of dosimetry in radiotherapy treatment requires the accurate delimitation of the gross tumor volume. This can be achieved by complementing the anatomical detail provided by CT images through fusion with other imaging modalities that provide additional metabolic and physiological information. Therefore, use of multiple imaging modalities for radiotherapy treatment planning requires an accurate image registration method. This work describes tests carried out on a Discovery LS positron emission/computed tomography (PET/CT) system by General Electric Medical Systems (GEMS), for its later use to obtain images to delimit the target in radiotherapy treatment. Several phantoms have been used to verify image correlation, in combination with fiducial markers, which were used as a system of external landmarks. We analyzed the geometrical accuracy of two different fusion methods with the images obtained with these phantoms. We first studied the fusion method used by the PET/CT system by GEMS (hardware fusion) on the basis that there is satisfactory coincidence between the reconstruction centers in CT and PET systems; and secondly the fiducial fusion, a registration method, by means of least-squares fitting algorithm of a landmark points system. The study concluded with the verification of the centroid position of some phantom components in both imaging modalities. Centroids were estimated through a calculation similar to center-of-mass, weighted by the value of the CT number and the uptake intensity in PET. The mean deviations found for the hardware fusion method were: deltax/ +/-sigma = 3.3 mm +/- 1.0 mm and /deltax/ +/-sigma = 3.6 mm +/- 1.0 mm. These values were substantially improved upon applying fiducial fusion based on external landmark points: /deltax/ +/-sigma = 0.7 mm +/- 0.8 mm and /deltax/ +/-sigma = 0.3 mm 1.7 mm. We also noted that differences found for each of the fusion methods were similar for both the axial and helical CT image acquisition protocols.
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Affiliation(s)
- M C Baños-Capilla
- Department of Medical Physics, Radiation Oncology Hospital Virgen del Consuelo, Callosa de Ensarria 12-Valencia, Valencia 46007, Spain
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Gallardo MT, Mateos L, Artieda J, Wesslen L, Ruiz C, García MA, Galmés-Truyols A, Martin A, Hernández-Pezzi G, Andersson Y, Gárate T, Christensson D. Outbreak of trichinellosis in Spain and Sweden due to consumption of wild boar meat contaminated with Trichinella britovi. ACTA ACUST UNITED AC 2007; 12:E070315.1. [PMID: 17439785 DOI: 10.2807/esw.12.11.03154-en] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Early this year, 21 people became ill with trichinellosis in both Spain and Sweden. This was traced to consumption of home-made wild boar sausage from an original source in Spain.
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Affiliation(s)
- M T Gallardo
- Delegacion de Sanidad y Bienestar Social de Castilla y Leon, Palencia, Spain
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Abstract
The IFN-induced double-stranded RNA-dependent protein kinase (PKR) is one of the four mammalian serine-threonine kinases (the three others being HRI, GCN2 and PERK) that phosphorylate the eIF2 alpha translation initiation factor, in response to stress signals, mainly as a result of viral infections. eIF2 alpha phosphorylation results in arrest of translation of both cellular and viral mRNAs, an efficient way to inhibit virus replication. The particularity of PKR is to activate by binding to dsRNA through two N terminal dsRNA binding motifs (dsRBM). PKR activation during a viral infection represents a threat for several viruses, which have therefore evolved to express PKR inhibitors, such as the Vaccinia E3L and K3L proteins. The function of PKR can also be regulated by cellular proteins, either positively (RAX/PACT; Mda7) or negatively (p58IPK, TRBP, nucleophosmin, Hsp90/70). PKR can provoke apoptosis, in part through its ability to control protein translation, but the situation appears to be more complex, as NF-kappaB, ATF-3 and p53 have also been implicated. PKR-induced apoptosis involves mainly the FADD/caspase 8 pathway, while the mitochondrial APAF/caspase 9 pathway is also engaged. As a consequence of the effects of PKR on translation, transcription and apoptosis, PKR can function to control cell growth and cell differentiation, and its activity can be controlled by the action of several oncogenes.
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Affiliation(s)
- M A García
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, CSIC, Ciudad Universitaria Cantoblanco, 28049 Madrid, Spain
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Seldin MF, Tian C, Shigeta R, Scherbarth HR, Silva G, Belmont JW, Kittles R, Gamron S, Allevi A, Palatnik SA, Alvarellos A, Paira S, Caprarulo C, Guillerón C, Catoggio LJ, Prigione C, Berbotto GA, García MA, Perandones CE, Pons-Estel BA, Alarcon-Riquelme ME. Argentine population genetic structure: large variance in Amerindian contribution. Am J Phys Anthropol 2007; 132:455-62. [PMID: 17177183 PMCID: PMC3142769 DOI: 10.1002/ajpa.20534] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Argentine population genetic structure was examined using a set of 78 ancestry informative markers (AIMs) to assess the contributions of European, Amerindian, and African ancestry in 94 individuals members of this population. Using the Bayesian clustering algorithm STRUCTURE, the mean European contribution was 78%, the Amerindian contribution was 19.4%, and the African contribution was 2.5%. Similar results were found using weighted least mean square method: European, 80.2%; Amerindian, 18.1%; and African, 1.7%. Consistent with previous studies the current results showed very few individuals (four of 94) with greater than 10% African admixture. Notably, when individual admixture was examined, the Amerindian and European admixture showed a very large variance and individual Amerindian contribution ranged from 1.5 to 84.5% in the 94 individual Argentine subjects. These results indicate that admixture must be considered when clinical epidemiology or case control genetic analyses are studied in this population. Moreover, the current study provides a set of informative SNPs that can be used to ascertain or control for this potentially hidden stratification. In addition, the large variance in admixture proportions in individual Argentine subjects shown by this study suggests that this population is appropriate for future admixture mapping studies.
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Affiliation(s)
- Michael F Seldin
- Rowe Program in Human Genetics, Department of Biological Chemistry, University of California Davis, Davis, CA 95616, USA.
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García MA, Gil J, Ventoso I, Guerra S, Domingo E, Rivas C, Esteban M. Impact of protein kinase PKR in cell biology: from antiviral to antiproliferative action. Microbiol Mol Biol Rev 2007; 70:1032-60. [PMID: 17158706 PMCID: PMC1698511 DOI: 10.1128/mmbr.00027-06] [Citation(s) in RCA: 579] [Impact Index Per Article: 34.1] [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: 12/15/2022] Open
Abstract
The double-stranded RNA-dependent protein kinase PKR is a critical mediator of the antiproliferative and antiviral effects exerted by interferons. Not only is PKR an effector molecule on the cellular response to double-stranded RNA, but it also integrates signals in response to Toll-like receptor activation, growth factors, and diverse cellular stresses. In this review, we provide a detailed picture on how signaling downstream of PKR unfolds and what are the ultimate consequences for the cell fate. PKR activation affects both transcription and translation. PKR phosphorylation of the alpha subunit of eukaryotic initiation factor 2 results in a blockade on translation initiation. However, PKR cannot avoid the translation of some cellular and viral mRNAs bearing special features in their 5' untranslated regions. In addition, PKR affects diverse transcriptional factors such as interferon regulatory factor 1, STATs, p53, activating transcription factor 3, and NF-kappaB. In particular, how PKR triggers a cascade of events involving IKK phosphorylation of IkappaB and NF-kappaB nuclear translocation has been intensively studied. At the cellular and organism levels PKR exerts antiproliferative effects, and it is a key antiviral agent. A point of convergence in both effects is that PKR activation results in apoptosis induction. The extent and strength of the antiviral action of PKR are clearly understood by the findings that unrelated viral proteins of animal viruses have evolved to inhibit PKR action by using diverse strategies. The case for the pathological consequences of the antiproliferative action of PKR is less understood, but therapeutic strategies aimed at targeting PKR are beginning to offer promising results.
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Affiliation(s)
- M A García
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Ciudad Universitaria Cantoblanco, 28049 Madrid, Spain
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Sánchez ML, García MA, Pérez IA, de Torre B. Ground laser remote sensing measurements of a Saharan dust outbreak in Central Spain. Influence on PM10 concentrations in the lower and upper Spanish plateaus. Chemosphere 2007; 67:229-39. [PMID: 17207516 DOI: 10.1016/j.chemosphere.2006.10.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 10/10/2006] [Accepted: 10/12/2006] [Indexed: 05/13/2023]
Abstract
This paper presents the hourly evolution of a severe Saharan dust outbreak, (SDO), affecting Central Spain over July 23-24, 2004 measured with a laser remote sensing device at a location close to the Guadarrama mountain range foothills and its impact on PM10 levels (particles with an aerodynamic diameter below 10 microm) recorded at four contrasting monitoring stations located in the upper and lower Spanish plateau, some 170km apart. During the period of study the Saharan dust layer, (SDL), presented significant hourly variability in height (3600-1500m), depth (1500-700m) and aerosol dust loading (extinction coefficient, EC, 0.22-1.28km(-1)). Overnight layering was generally observed whereas a well mixed layer prevailed in the afternoon. The (SDO) impact on the lower levels took place approximately 12h after the (SDL) was initially observed and triggered by a descending dust enriched, evidencing the important role of subsidence over the presence of dust in lower altitudes. During the event, PM10 levels at all the stations exceeded EU air quality daily mean standards, 50 microgm(-3), on 2-4days. The maximum values ranged from 185 to 245 microgm(-3) depending on the monitoring station. The impact on PM10 spread from 2days in the upper plateau to 3-4 in the lower plateau, in agreement with the geographical location of the monitoring stations with respect to the southwest origin of the intrusion. The impact was even more dramatic on PM10 hourly concentrations, leading to maximum hourly peaks ranging from 322 to 598 microgm(-3) again depending on the monitoring station. Correlations between EC vertical profiles and PM10 hourly concentrations at the monitoring stations showed the great influence of the (SDO) on surface concentrations. The best linear fits corresponded to the extinction coefficients in the lower altitudes (close to the lower range of the device 500-650m), EC2, yielding satisfactory correlation coefficients ranging from 0.68 to 0.71. The low variability of the slope of each individual linear fit, 19.2%, shows the similar impact of (SDO) on the PM10 hourly concentrations recorded in the area under study.
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Affiliation(s)
- M L Sánchez
- Department of Applied Physics, University of Valladolid, 47005 Valladolid, Spain.
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Abelson AK, Johansson CM, Kozyrev SV, Kristjansdottir H, Gunnarsson I, Svenungsson E, Jönsen A, Lima G, Scherbarth HR, Gamron S, Allievi A, Palatnik SA, Alvarellos A, Paira S, Graf C, Guillerón C, Catoggio LJ, Prigione C, Battagliotti CG, Berbotto GA, García MA, Perandones CE, Truedsson L, Steinsson K, Sturfelt G, Pons-Estel B, Alarcón-Riquelme ME. No evidence of association between genetic variants of the PDCD1 ligands and SLE. Genes Immun 2006; 8:69-74. [PMID: 17136123 DOI: 10.1038/sj.gene.6364360] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PDCD1, an immunoreceptor involved in peripheral tolerance has previously been shown to be genetically associated with systemic lupus erythematosus (SLE). PDCD1 has two ligands whose genes are located in close proximity on chromosome 9p24. Our attention was drawn to these ligands after finding suggestive linkage to a marker (gata62f03, Z=2.27) located close to their genes in a genome scan of Icelandic families multiplex for SLE. Here, we analyse Swedish trios (N=149) for 23 single nucleotide polymorphisms (SNPs) within the genes of the PDCD1 ligands. Initially, indication of association to eight SNPs was observed, and these SNPs were therefore also analysed in Mexican trios (N=90), as well as independent sets of patients and controls from Sweden (152 patients, 448 controls) and Argentina (288 patients, 288 controls). We do not find support for genetic association to SLE. This is the first genetic study of SLE and the PDCD1 ligands and the lack of association in several cohorts implies that these genes are not major risk factors for SLE.
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Affiliation(s)
- A K Abelson
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
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Crespo P, García MA, Fernández Pinel E, Multigner M, Alcántara D, de la Fuente JM, Penadés S, Hernando A. Fe impurities weaken the ferromagnetic behavior in Au nanoparticles. Phys Rev Lett 2006; 97:177203. [PMID: 17155503 DOI: 10.1103/physrevlett.97.177203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2006] [Indexed: 05/12/2023]
Abstract
In this Letter, we report on a crucial experiment showing that magnetic impurities reduce the ferromagnetic order temperature in thiol-capped Au glyconanoparticles (GNPs). The spontaneous magnetization of AuFe GNPs exhibits a fast decrease with temperature that contrasts with the almost constant value of the magnetization observed in Au NPs. Moreover, hysteresis disappears below 300 K. Both features indicate that Fe impurities reduce the high local anisotropy field responsible for the ferromagnetic behavior in Au GNPs. As a consequence, the amazing ferromagnetism in Au NPs should not be associated with the presence of magnetic impurities.
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Affiliation(s)
- P Crespo
- Instituto de Magnetismo Aplicado (RENFE-UCM-CSIC), PO Box 155, 28230 Las Rozas, Madrid, Spain
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Izquierdo-Barba I, Conde F, Olmo N, Lizarbe MA, García MA, Vallet-Regí M. Vitreous SiO2-CaO coatings on Ti6Al4V alloys: reactivity in simulated body fluid versus osteoblast cell culture. Acta Biomater 2006; 2:445-55. [PMID: 16765884 DOI: 10.1016/j.actbio.2006.02.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2005] [Revised: 01/23/2006] [Accepted: 02/09/2006] [Indexed: 10/24/2022]
Abstract
Vitreous coatings of the SiO(2)-CaO system have been prepared on Ti6Al4V substrates by the sol-gel method. The textural parameters (porosity and roughness) and thickness of the films obtained increase when the concentration of the precursor solutions is raised. In vitro studies of these coatings have been performed using two approaches: soaking in simulated body fluid, and by growing osteoblasts on these materials. The results of both studies show differences in terms of chemical reactivity. While in simulated body fluid the coatings were dissolved without forming a bioactive surface, when osteoblast-like cells grew on the coatings they were more stable. Furthermore, cell culture assays show biocompatible behavior of these coatings making them of potential interest for clinical applications. The effect of the textural parameters of the obtained coatings on the cell functions (attachment, spreading, proliferation and differentiation) has also been studied. The results show an increase in these cell parameters as the roughness and porosity of the coatings increase.
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Affiliation(s)
- I Izquierdo-Barba
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
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Hernando A, Crespo P, García MA. Origin of orbital ferromagnetism and giant magnetic anisotropy at the nanoscale. Phys Rev Lett 2006; 96:057206. [PMID: 16486977 DOI: 10.1103/physrevlett.96.057206] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Indexed: 05/06/2023]
Abstract
The origin of orbital magnetism recently observed in different nanostructured films and particles is discussed as a consequence of spin-orbit coupling. It is shown that contact potentials induced at the thin film surface by broken symmetries, as domain boundaries in self-assembled monolayers, lead to orbital states that in some cases are of large radius. The component of the angular momentum normal to the surface can reach very high values that decrease the total energy by decreasing spin-orbit interaction energy. Intraorbital ferromagnetic spin correlations induce orbital momenta alignment. The estimated values of the magnetic moments per atom are in good agreement with the experimental observations in thiol capped gold films and nanoparticles.
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Affiliation(s)
- A Hernando
- Instituto de Magnetismo Aplicado, RENFE-UCM-CSIC, and Departamento de Física de Materiales UCM, P.O. Box 155, Las Rozas, Madrid 28230, Spain
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Hernando A, García MA. Comment on "bosons as the origin for giant magnetic properties of organic monolayers". Phys Rev Lett 2006; 96:029703; discussion 029704. [PMID: 16486665 DOI: 10.1103/physrevlett.96.029703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Indexed: 05/06/2023]
Affiliation(s)
- A Hernando
- Instituto de Magnetismo Aplicado RENFE-UCM and Departamento de Física de Materiales UCM Post Office Box 155 Las Rozas Madrid 28230 Spain
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