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González MI, González-Arjona M, Cussó L, Morcillo MÁ, Aguilera-Correa JJ, Esteban J, Kestler M, Calle D, Cerón C, Cortes-Canteli M, Muñoz P, Bouza E, Desco M, Salinas B. In Vivo Detection of Staphylococcus aureus Infections Using Radiolabeled Antibodies Specific for Bacterial Toxins. Int J Biomed Imaging 2024; 2024:3655327. [PMID: 38665417 PMCID: PMC11045290 DOI: 10.1155/2024/3655327] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/02/2024] [Accepted: 01/13/2024] [Indexed: 04/28/2024] Open
Abstract
Purpose The Gram-positive Staphylococcus aureus bacterium is one of the leading causes of infection in humans. The lack of specific noninvasive techniques for diagnosis of staphylococcal infection together with the severity of its associated complications support the need for new specific and selective diagnostic tools. This work presents the successful synthesis of an immunotracer that targets the α-toxin released by S. aureus. Methods [89Zr]Zr-DFO-ToxAb was synthesized based on radiolabeling an anti-α-toxin antibody with zirconium-89. The physicochemical characterization of the immunotracer was performed by high-performance liquid chromatography (HPLC), radio-thin layer chromatography (radio-TLC), and electrophoretic analysis. Its diagnostic ability was evaluated in vivo by positron emission tomography/computed tomography (PET/CT) imaging in an animal model of local infection-inflammation (active S. aureus vs. heat-killed S. aureus) and infective osteoarthritis. Results Chemical characterization of the tracer established the high radiochemical yield and purity of the tracer while maintaining antibody integrity. In vivo PET/CT image confirmed the ability of the tracer to detect active foci of S. aureus. Those results were supported by ex vivo biodistribution studies, autoradiography, and histology, which confirmed the ability of [89Zr]Zr-DFO-ToxAb to detect staphylococcal infectious foci, avoiding false-positives derived from inflammatory processes. Conclusions We have developed an immuno-PET tracer capable of detecting S. aureus infections based on a radiolabeled antibody specific for the staphylococcal alpha toxins. The in vivo assessment of [89Zr]Zr-DFO-ToxAb confirmed its ability to selectively detect staphylococcal infectious foci, allowing us to discern between infectious and inflammatory processes.
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Affiliation(s)
- María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Mario González-Arjona
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
| | - Lorena Cussó
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Miguel Ángel Morcillo
- Unidad de Aplicaciones Médicas de las Radiaciones Ionizantes, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - John Jairo Aguilera-Correa
- Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, 28040 Madrid, Spain
- Servicio de Microbiología Clínica Instituto de Investigación Sanitaria Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Madrid, Spain
| | - Jaime Esteban
- Servicio de Microbiología Clínica Instituto de Investigación Sanitaria Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Madrid, Spain
| | - Martha Kestler
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
| | - Daniel Calle
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Carlos Cerón
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, 28029 Madrid, Spain
| | - Marta Cortes-Canteli
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, 28029 Madrid, Spain
- Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), 28040 Madrid, Spain
| | - Patricia Muñoz
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Emilio Bouza
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, 28911 Madrid, Spain
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, 28911 Madrid, Spain
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González MI, Gallardo B, Cerón C, Aguilera-Jiménez E, Cortes-Canteli M, Peinado H, Desco M, Salinas B. Isolation of goat milk small extracellular vesicles by novel combined bio-physical methodology. Front Bioeng Biotechnol 2023; 11:1197780. [PMID: 37829562 PMCID: PMC10564981 DOI: 10.3389/fbioe.2023.1197780] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/15/2023] [Indexed: 10/14/2023] Open
Abstract
Introduction: Goat milk is notable as a cost-effective source of exosomes, also known as small extracellular vesicles (sEVs). These nanoparticle-like structures are naturally secreted by cells and have emerged as potential diagnostic agents and drug delivery systems, also supported by their proven therapeutic effects. However, the complexity of goat milk and the lack of standardized protocols make it difficult to isolate pure sEVs. This work presents an optimized approach that combines well-established physical isolation methods with the biological treatment of milk with rennet. Methods: sEVs derived from goat milk were purified using a methodology that combines differential ultracentrifugation, rennet, and size-exclusion chromatography. This novel strategy was compared with two of the main methodologies developed for isolating extracellular vesicles from bovine and human milk by means of physico-chemical characterization of collected vesicles using Transmission Electron Microscopy, Western blot, Bradford Coomassie assay, Dynamic Light Scattering, Nanoparticle Tracking Analysis and Zeta Potential. Results: Vesicles isolated with the optimized protocol had sEV-like characteristics and high homogeneity, while samples obtained with the previous methods were highly aggregated, with significant residual protein content. Discussion: This work provides a novel biophysical methodology for isolating highly enriched goat milk sEVs samples with high stability and homogeneity, for their further evaluation in biomedical applications as diagnostic tools or drug delivery systems.
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Affiliation(s)
- María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
| | - Begoña Gallardo
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Madrid, Spain
| | - Carlos Cerón
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
| | - Elena Aguilera-Jiménez
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Madrid, Spain
| | - Marta Cortes-Canteli
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
- Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Héctor Peinado
- Laboratorio de Microambiente y Metástasis, Departamento de Oncología Molecular, Centro Nacional de Investigaciones Oncológicas (CNIO) Carlos III, Madrid, Spain
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, Madrid, Spain
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, Madrid, Spain
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Santos-Coquillat A, Herreros-Pérez D, Samaniego R, González MI, Cussó L, Desco M, Salinas B. Dual-labeled nanoparticles based on small extracellular vesicles for tumor detection. Biol Direct 2022; 17:31. [DOI: 10.1186/s13062-022-00345-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background
Small extracellular vesicles (sEVs) are emerging natural nanoplatforms in cancer diagnosis and therapy, through the incorporation of signal components or drugs in their structure. However, for their translation into the clinical field, there is still a lack of tools that enable a deeper understanding of their in vivo pharmacokinetics or their interactions with the cells of the tumor microenvironment. In this study, we have designed a dual-sEV probe based on radioactive and fluorescent labeling of goat milk sEVs.
Results
The imaging nanoprobe was tested in vitro and in vivo in a model of glioblastoma. In vitro assessment of the uptake of the dual probe in different cell populations (RAW 264.7, U87, and HeLa) by optical and nuclear techniques (gamma counter, confocal imaging, and flow cytometry) revealed the highest uptake in inflammatory cells (RAW 264.7), followed by glioblastoma U87 cells. In vivo evaluation of the pharmacokinetic properties of nanoparticles confirmed a blood circulation time of ~ 8 h and primarily hepatobiliary elimination. The diagnostic capability of the dual nanoprobe was confirmed in vivo in a glioblastoma xenograft model, which showed intense in vivo uptake of the SEV-based probe in tumor tissue. Histological assessment by confocal imaging enabled quantification of tumor populations and confirmed uptake in tumor cells and tumor-associated macrophages, followed by cancer-associated fibroblasts and endothelial cells.
Conclusions
We have developed a chemical approach for dual radioactive and fluorescent labeling of sEVs. This methodology enables in vivo and in vitro study of these vesicles after exogenous administration. The dual nanoprobe would be a promising technology for cancer diagnosis and a powerful tool for studying the biological behavior of these nanosystems for use in drug delivery.
Graphical Abstract
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Santos-Coquillat A, González MI, Clemente-Moragón A, González-Arjona M, Albaladejo-García V, Peinado H, Muñoz J, Ximénez Embún P, Ibañez B, Oliver E, Desco M, Salinas B. Goat Milk Exosomes As Natural Nanoparticles for Detecting Inflammatory Processes By Optical Imaging. Small 2022; 18:e2105421. [PMID: 34854563 DOI: 10.1002/smll.202105421] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/29/2021] [Indexed: 06/13/2023]
Abstract
Exosomes are cell-derived nanovesicles with a proven intercellular signaling role in inflammation processes and immune response. Due to their natural origin and liposome-like structure, these nanometer-scale vesicles have emerged as novel platforms for therapy and diagnosis. In this work, goat milk exosomes are isolated and fully characterized in terms of their physicochemical properties, proteomics, and biochemical profile in healthy mice, and used to detect inflammatory processes by optical imaging. For the in vitro and in vivo experiments, the exosomes are covalently labeled with the commercial fluorophores sulfo-Cyanine 5 and BODIPY-FL to create nanoprobes. In vitro studies using confocal imaging, flow cytometry, and colorimetric assays confirm the internalization of the nanoprobes as well their lack of cytotoxicity in macrophage populations RAW 264.7. Optical imaging in the mouse peritoneal region confirms the in vivo ability of one of the nanoprobes to localize inflammatory processes. In vivo imaging shows exosome uptake in the inflamed peritoneal region, and flow-cytometric analysis of peritonitis exudates confirms the uptake by macrophage and neutrophil populations. These results support the promising use of goat milk exosomes as natural probes in the detection of inflammatory processes.
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Affiliation(s)
- Ana Santos-Coquillat
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
| | - María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
| | - Agustín Clemente-Moragón
- Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, 28029, Spain
| | - Mario González-Arjona
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
| | - Virginia Albaladejo-García
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
| | - Héctor Peinado
- Microenvironment and Metastasis Laboratory, Department of Molecular Oncology, Spanish National Cancer Research Center (CNIO), Madrid, 28029, Spain
| | - Javier Muñoz
- Proteomics Core Unit, ProteoRED-ISCIII, Spanish National Cancer Research Center (CNIO), Madrid, 28029, Spain
| | - Pilar Ximénez Embún
- Proteomics Core Unit, ProteoRED-ISCIII, Spanish National Cancer Research Center (CNIO), Madrid, 28029, Spain
| | - Borja Ibañez
- Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, 28029, Spain
- CIBER de Enfermedades CardioVasculares (CIBERCV), Madrid, 28029, Spain
- Cardiology Department, IIS-Fundación Jiménez Diaz University Hospital, Madrid, 28015, Spain
| | - Eduardo Oliver
- Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, 28029, Spain
- CIBER de Enfermedades CardioVasculares (CIBERCV), Madrid, 28029, Spain
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, 28029, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, 28911, Spain
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, 28029, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, 28911, Spain
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Gutiérrez G, Moreno Naranjo L, Cruz JE, Javela LG, González MI, Rodríguez Cajamarca J. Long-term Mate Selection in Latin America: An Analysis of Personal Ads. Rev colomb psicol 2022. [DOI: 10.15446/rcp.v31n1.89118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The present work aims to study which factors are relevant in the long-term mate selection, from a Lonely-hearts personal advertisement sample of Spanish-speaking consumers of Cosmopolitan Magazine´s Colombian Edition. We analyzed 1468 publications (770 men and 698 women) using a coding system based on the theories of sexual strategies, genetic quality indicators and the preferences classification used in personal ads studies. Initially, we found trends as a greater predilection for psychological attributes and a greater demand to require more traits than offering them. In addition, the cross-cultural pattern demonstrated that men prefer women’s physical characteristics, while women require status/resources by men. Finally, men tended to be more selective in the age range of 36-45 years, while women’s selectivity decreased with age. The results replicate many of the patterns found in investigations related to human sexual selection, also bring enlightenment about new preference dimensions to study in the future.
How to cite this article: Moreno, L., Gutiérrez, G., Cruz, J., Javela, L., Gonzáles, M., & Rodríguez, J. (2022).Long-term Mate Selection in Latin America: Evidence from Lonely-Heart Ads. Revista Colombiana de Psicología, 31 (1), 77-92. https://doi.org/10.15446/rcp.v31n1.89118
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Arab JP, Castro L, Gómez PC, Vignolo P, Arrese M, Barrera F, Castro F, Díaz LA, Donoso A, Elgueta K, González K, González MI, Moreno M, Lazarte R, Poniachik J, Salman P, Valderas JP. Resumen ejecutivo: Enfermedad por hígado graso no alcohólico en sujetos con diabetes mellitus tipo 2: Postura conjunta de la Asociación Chilena de Hepatología (ACHHEP) y la Sociedad Chilena de Diabetología (SOCHIDIAB). Rev Med Chil 2021; 149:1360-1371. [PMID: 35319691 DOI: 10.4067/s0034-98872021000901360] [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] [Received: 09/09/2020] [Accepted: 10/26/2021] [Indexed: 11/17/2022]
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González MI, González-Arjona M, Santos-Coquillat A, Vaquero J, Vázquez-Ogando E, de Molina A, Peinado H, Desco M, Salinas B. Covalently Labeled Fluorescent Exosomes for In Vitro and In Vivo Applications. Biomedicines 2021; 9:biomedicines9010081. [PMID: 33467033 PMCID: PMC7829962 DOI: 10.3390/biomedicines9010081] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/31/2020] [Accepted: 01/11/2021] [Indexed: 01/05/2023] Open
Abstract
The vertiginous increase in the use of extracellular vesicles and especially exosomes for therapeutic applications highlights the necessity of advanced techniques for gaining a deeper knowledge of their pharmacological properties. Herein, we report a novel chemical approach for the robust attachment of commercial fluorescent dyes to the exosome surface with covalent binding. The applicability of the methodology was tested on milk and cancer cell-derived exosomes (from U87 and B16F10 cancer cells). We demonstrated that fluorescent labeling did not modify the original physicochemical properties of exosomes. We tested this nanoprobe in cell cultures and healthy mice to validate its use for in vitro and in vivo applications. We confirmed that these fluorescently labeled exosomes could be successfully visualized with optical imaging.
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Affiliation(s)
- María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (M.I.G.); (M.G.-A.); (A.S.-C.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Mario González-Arjona
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (M.I.G.); (M.G.-A.); (A.S.-C.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Ana Santos-Coquillat
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (M.I.G.); (M.G.-A.); (A.S.-C.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Javier Vaquero
- HepatoGastro Lab, Servicio de Ap. Digestivo del HGU Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (J.V.); (E.V.-O.)
- Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBEREHD), 28029 Madrid, Spain
| | - Elena Vázquez-Ogando
- HepatoGastro Lab, Servicio de Ap. Digestivo del HGU Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (J.V.); (E.V.-O.)
| | - Antonio de Molina
- Comparative Medicine Unit, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain;
| | - Héctor Peinado
- Microenvironment and Metastasis Laboratory, Department of Molecular Oncology, Spanish National Cancer Research Center (CNIO), 28029 Madrid, Spain;
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (M.I.G.); (M.G.-A.); (A.S.-C.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, 28911 Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029 Madrid, Spain
- Correspondence: (M.D.); (B.S.)
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain; (M.I.G.); (M.G.-A.); (A.S.-C.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, 28911 Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029 Madrid, Spain
- Correspondence: (M.D.); (B.S.)
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Pagotto V, Ferloni A, Mercedes Soriano M, Díaz M, Braguinsky Golde N, González MI, Asprea V, Staneloni MI, Zingoni P, Vidal G, Aliperti V, Michelángelo H, Figar S. Active monitoring of early safety of Sputnik V vaccine in Buenos Aires, Argentina. Medicina (B Aires) 2021; 81:408-414. [PMID: 34137701] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023] Open
Abstract
This study describes the incidence of early events supposedly attributable to vaccination or immunization (ESAVI) that occurred in healthcare workers who had been inoculated with the first component of the Sputnik V vaccine. Safety at 72 h post-immunization was analyzed based on a self-reported form. Between January 5 and January 20, 2021, in Buenos Aires, Argentina, a total of 707 healthcare workers (median age 35 yrs, female 67%) were vaccinated. The response rate was 96.6% (n: 683) and 487 (71.3%) participants reported at least one ESAVI. The incidence rate was 6.3 per 1000 person/hours. The total number of ESAVIs was 1434. A total of 469 local reactions were reported, 57% of the participants reported pain at the injection site, and 11% had redness and swelling. A total of 968 systemic reactions were informed, including new or worsened muscle pain, referred by 58% of the participants, fever referred by 40%, and diarrhea referred by 5%. Five percent (n: 34) had serious adverse events and one participant had to be hospitalized. The ESAVI rate was higher in females than males (66.4% versus 51.4%; HR 1.38; 95% CI 1.13-5.38) and in workers younger than 55 yrs old (63.0% versus 28.0%; HR 2.66; 95% CI 1.32-5.38). This study demonstrates high rates of early local and systemic reactions. However, serious events were rare. Studies on long-term safety, stratified by sex and age, are needed.
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Affiliation(s)
- Vanina Pagotto
- Departamento de Investigación, Hospital Italiano de Buenos Aires, Argentina. E-mail:
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
| | - Analia Ferloni
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
- Área de Calidad, Hospital Italiano de Buenos Aires, Argentina
| | - María Mercedes Soriano
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
- Área de Calidad, Hospital Italiano de Buenos Aires, Argentina
| | - Morena Díaz
- Departamento de Investigación, Hospital Italiano de Buenos Aires, Argentina
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
| | - Nahuel Braguinsky Golde
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
- Área de Calidad, Hospital Italiano de Buenos Aires, Argentina
| | | | - Valeria Asprea
- Área Recursos Humanos, Hospital Italiano de Buenos Aires, Argentina
| | | | - Paula Zingoni
- Dirección General de Planificación Operativa, Ministerio de Salud del Gobierno de la Ciudad de Buenos Aires, Argentina
| | - Gustavo Vidal
- Departamento de Farmacia, Hospital Italiano de Buenos Aires, Argentina
| | - Valeria Aliperti
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
- Área de Calidad, Hospital Italiano de Buenos Aires, Argentina
| | | | - Silvana Figar
- Departamento de Investigación, Hospital Italiano de Buenos Aires, Argentina
- Sección de Epidemiología, Hospital Italiano de Buenos Aires, Argentina
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González MI, Martín-Duque P, Desco M, Salinas B. Radioactive Labeling of Milk-Derived Exosomes with 99mTc and In Vivo Tracking by SPECT Imaging. Nanomaterials (Basel) 2020; 10:nano10061062. [PMID: 32486215 PMCID: PMC7352469 DOI: 10.3390/nano10061062] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/23/2020] [Accepted: 05/25/2020] [Indexed: 12/12/2022]
Abstract
Over the last decade, exosomes from diverse biological sources have been proposed as new natural platforms in drug delivery. Translation of these nanometric tools to clinical practice requires deep knowledge of their pharmacokinetic properties and biodistribution. The pharmacokinetic properties of exosomes are sometimes evaluated using biochemical and histological techniques that are considerably invasive. As an alternative, we present radiochemical labeling of milk-derived exosomes based on reduced 99mTc (IV) without modifying biological and physicochemical properties. This approach enables longitudinal tracking of natural exosomes by non-invasive single photon emission computed tomography (SPECT) imaging and the evaluation of their pharmacokinetic properties according to the route of administration.
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Affiliation(s)
- María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (M.I.G.); (B.S.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Pilar Martín-Duque
- Instituto Aragonés de Ciencias de la Salud (IACS/IIS Aragón), 50009 Zaragoza, Spain;
- Fundación Agencia Aragonesa para la Investigación y el Desarrollo (ARAID), 50018 Zaragoza, Spain
- Centro de Investigación en Red Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (M.I.G.); (B.S.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, 28911 Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029 Madrid, Spain
- Correspondence:
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (M.I.G.); (B.S.)
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, 28911 Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029 Madrid, Spain
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Chalela JG, González MI, Ordóñez Rubiano MF. Pitting Edema of the Face, An Important Differential Diagnosis. Actas Dermosifiliogr (Engl Ed) 2020; 111:65-66. [PMID: 31668341 DOI: 10.1016/j.ad.2018.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/03/2018] [Accepted: 04/16/2018] [Indexed: 11/17/2022] Open
Affiliation(s)
- J G Chalela
- Departamento de Dermatología, Hospital Universitario Fundación Santa Fe, Bogotá, Colombia
| | - M I González
- Departamento de Anatomía Patológica, Universidad Militar Nueva Granada, Bogotá, Colombia
| | - M F Ordóñez Rubiano
- Departamento de Dermatología, Universidad Militar Nueva Granada, Bogotá, Colombia.
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Sapunar J, Escalona A, Araya AV, Aylwin CG, Bastías MJ, Boza C, Cárcamo C, Csendes A A, Davidof F P, Funke R, Gómez P, González MI, Lahsen R, Lanzarini E, Maíz A, Mujica V, Muñoz R, Pérez G, Raimann F, Salman P, Sepúlveda M, Soto N, Villagrán R. [Consensus statement of the Chilean endocrinological society on the role of bariatric surgery in type 2 diabetes]. Rev Med Chil 2019; 146:1175-1183. [PMID: 30724982 DOI: 10.4067/s0034-98872018001001175] [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
Diabetes Mellitus (DM) and obesity are a public health problem in Chile. Bariatric surgery is the most effective treatment alternative to achieve a significant and sustained weight reduction in patients with morbid obesity. The results of controlled clinical trials indicate that, compared to medical treatment, surgery for obese patients with DM2 allows a better control of blood glucose and cardiovascular risk factors, reduces the need for medications and increases the likelihood for remission. Consensus conferences and clinical practice guidelines support bariatric surgery as an option to treat DM2 in Class III Obesity (Body Mass Index (BMI) > 40) regardless of the glycemic control and the complexity of pharmacological treatment and in Class II Obesity (BMI 35-39,9) with inadequate glycemic control despite optimal pharmacological treatment and lifestyle. However, surgical indication for patients with DM2 and BMI between 30-34.9, the most prevalent sub-group, is only suggested. The Chilean Societies of Endocrinology and Diabetes and of Bariatric and Metabolic Surgery decided to generate a consensus regarding the importance of other factors related to DM2 that would allow a better selection of candidates for surgery, particularly when weight does not constitute an indication. Considering the national reality, we also need a statement regarding the selection and characteristics of the surgical procedure as well as the role of the diabetologist in the multidisciplinary team.
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Affiliation(s)
- Jorge Sapunar
- Departamento de Medicina Interna y Centro EPICYN, Facultad de Medicina, Universidad de la Frontera, Temuco, Chile
| | - Alex Escalona
- Clínica Universidad de los Andes, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | | | - Carmen Gloria Aylwin
- Clínica Universidad de los Andes, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - María Juliana Bastías
- Sección Endocrinología, Diabetes y Nutrición, Departamento de Medicina Interna, Hospital Naval Almirante Nef, Viña del Mar, Chile
| | | | - Carlos Cárcamo
- Instituto de Cirugía, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile
| | | | | | | | | | | | | | | | - Alberto Maíz
- Departamento. Nutrición, Diabetes y Metabolismo, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Verónica Mujica
- Facultad de Medicina, Universidad Católica del Maule, Talca, Chile
| | - Rodrigo Muñoz
- Departamento de Cirugía Digestiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Gustavo Pérez
- Departamento de Cirugía Digestiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Félix Raimann
- Centro Integral de Obesidad y Diabetes, Servicio de Cirugía y Endoscopía, Clínica Puerto Varas, Puerto Varas, Chile
| | - Patricio Salman
- Unidad de Endocrinología, Departamento de Medicina Interna, Facultad de Medicina. universidad de Concepción. Concepción, Chile
| | - Matías Sepúlveda
- Hospital de la Dirección de Previsión de Carabineros de Chile (DIPRECA). Santiago, Chile
| | - Néstor Soto
- Unidad de Endocrinología y Diabetes, Servicio de Medicina Interna, Hospital San Borja Arriarán. Santiago, Chile
| | - Rodrigo Villagrán
- Departamento de Cirugía Bariátrica Metabólica, Clínica Bupa Antofagasta. Antofagasta, Chile
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León JD, González MI, Gallardo JF. Ciclos biogeoquímicos en bosques naturales y plantaciones de coníferas en ecosistemas de alta montaña de Colombia. REV BIOL TROP 2018. [DOI: 10.15517/rbt.v59i4.33193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
La caída y descomposición de hojarasca representan los principales ingresos de materia orgánica y nutrientes a los ecosistemas forestales. Se estudiaron la caída y acumulación de hojarasca fina y el retorno de nutrientes, en un robledal (Quercus humboldtii) y en plantaciones de pino (Pinus patula) y ciprés (Cupressus lusitanica) en tierras altas de Colombia. La caída de hojarasca fina fue similar entre el robledal (7.5Mg/ha.a) y el pinar (7.8Mg/ha.a), y muy inferior en el cipresal (3.5Mg/ha.a). El mantillo representó 1.76, 1.73 y 1.3Mg/ha.a en el robledal, pinar y cipresal, respectivamente. El tiempo medio de residencia (TMR) del mantillo siguió la secuencia: cipresal (3.3 años)>pinar (2.1 años)>robledal (1.8 años). La cantidad de nutrientes retenidos en el mantillo siguió la secuencia: pinar (115kg/ ha)>robledal (78kg/ha)>cipresal (24kg/ha). Los menores TMR de nutrientes se presentaron para la hojarasca foliar del robledal, en su mayoría inferiores a 1.0 años. En términos de la función ecosistémica en el robledal los procesos estudiados son muy superiores vía provisión de nutrientes al suelo y regulación de los ciclos biogeoquímicos, aspectos que deben ser considerados previa implementación de programas de repoblamiento forestal.
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Wong E, González MI, Antillón F, Glenn E. Efecto de varios agentes, a diferentes niveles de pH, sobre la tasa de filtración de la piangua, Anadara tuberculosa (Mollusca: Arcidae). REV BIOL TROP 2018. [DOI: 10.15517/rbt.v45i4.32000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Se estudió el efecto de jugo de limón, ácido láctico, ácido acético y un extracto comercial de semillas de cítricos, a diferentes niveles de pH, sobre la tasa de filtración de la piangua (Anadara tuberculosa). Este estudio es particularmente importante porque puede ayudar a establecer condiciones para sistemas de depuración basados en compuestos ácidos. Se recolectaron especímenes cuyo diámetro midiera entre 4.0 y 4.5 cm , en el estero de Puntarenas, Golfo de Nicoya. Se prepararon por triplicado botellas con 11 de solución salina ajustando el pH a 4.5, 5.0, 5.5 06.0 con cada uno de los siguientes ácidos: Jugo de limón (citrus aurantifolia), ácido acético, (4% V/v), ácido láctico (85% V/v) Y CITREX (un extracto comercial de semillas de cítrico). Cada botella fue oxigenada hasta la saturación y mantenida a temperatura ambiente. También por triplicado, se llevaron a cabo pruebas control a un pH de 7.0. Se agregó un animal a cada botella y se determinó la tasa de filtración cada 8 hr por 48 hr. El extracto de semillas de cítricos causó la muerte de las pianguas luego de 10 minutos de exposición. Se encontró una neutralización, en el tiempo, del pH inicial en los diferentes tratamientos, más lenta para el ácido acético, seguida por el ácido láctico y el jugo de limón. No se encontró diferencia significativa entre las tasas de filtración para los agentes ácidos y la tasa de filtración para el control. La tendencia de la tasa de filtración correspondió a una tendencia cíclica normal, no decreciente, demostrando que los agentes ácidos, en el ámbito de pH observado, no causan afección sobre el metabolismo de los animales.
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Escosteguy PD, Scabuzzo C, González MI. Análisis bioarqueológico de los restos de arroyo El Siasgo, (supuesto Homo caputinclinatus de Ameghino 1910). Rev Arg Antrop Biol 2017. [DOI: 10.17139/raab.2017.0019.02.04] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Las investigaciones arqueológicas desarrolladas en la Depresión del río Salado durante las últimas tres décadas permitieron profundizar en el conocimiento de los grupos prehispánicos que vivieron allí durante el Holoceno tardío. Como resultado de los trabajos de campo en la microrregión, se conocen tres sitios con restos humanos (La Guillerma Ñandú, La Guillerma 1 y La Guillerma 5), totalizando un número mínimo de seis individuos inhumados de manera aislada. En esta contribución se suma, a la información precedente, el primer estudio bioarqueológico de un esqueleto recuperado por Carlos Ameghino en el arroyo El Siasgo a principios del siglo XX. El objetivo es presentar los resultados del análisis bioarqueológico de este esqueleto, así como el fechado radiocarbónico obtenido. Se busca así aportar a la revisión de un caso de singular importancia histórica a través de la aplicación de un marco teórico y metodológico renovado. Como resultado de los análisis bioarqueológicos se pudo establecer que los restos corresponden a un individuo juvenil, de entre 12 y 15 años, que habría sido inhumado en posición primaria y que presentaba el cráneo deformado de manera circular. Se obtuvo, para este esqueleto, un fechado de ca. 3500 años AP, que es el más antiguo para la depresión del río Salado. Los análisis isotópicos reflejan que la dieta del individuo fue mixta e incluyó la ingesta, en pequeñas cantidades, de alimentos marinos. Finalmente, estos resultados son integrados a la información bioarqueológica disponible para el área.
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Lebrecht W, Vogel EE, Valdés JF, Ramirez-Pastor AJ, Centres PM, González MI, Nieto FD. Site trimer percolation on square lattices. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 92:012129. [PMID: 26274146 DOI: 10.1103/physreve.92.012129] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Indexed: 06/04/2023]
Abstract
Percolation of site trimers (k-mers with k=3) is investigated in a detailed way making use of an analytical model based on renormalization techniques in this problem. Results are compared to those obtained here by means of extensive computer simulations. Five different deposition possibilities for site trimers are included according to shape and orientation of the depositing objects. Analytical results for the percolation threshold p(c) are all close to 0.55, while numerical results show a slight dispersion around this value. A comparison with p(c) values previously reported for monomers and dimers establishes the tendency of p(c) to decrease as k increases. Critical exponent ν was also obtained both by analytical and numerical methods. Results for the latter give values very close to the expected value 4/3 showing that this percolation case corresponds to the universality class of random percolation.
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Affiliation(s)
- W Lebrecht
- Departamento de Ciencias Físicas, Universidad de La Frontera, Casilla 54-D, Temuco, Chile
| | - E E Vogel
- Departamento de Ciencias Físicas, Universidad de La Frontera, Casilla 54-D, Temuco, Chile
| | - J F Valdés
- Departamento de Ciencias Físicas, Universidad de La Frontera, Casilla 54-D, Temuco, Chile
| | - A J Ramirez-Pastor
- Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - P M Centres
- Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - M I González
- Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - F D Nieto
- Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Ejército de los Andes 950, D5700HHW, San Luis, Argentina
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Monge-Nájera J, Hernández F, González MI, Soley J, Araya J, Zolla S. Spatial distribution, territoriality and sound production by tropical cryptic butterflies (Hamadryas, Lepidoptera: Nymphalidae): implications for the ''industrial melanism" debate. REV BIOL TROP 2015. [DOI: 10.15517/rbt.v46i2.19532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Las Hamadryas son mariposas neotropicales que emiten sonido y pasan mucho tiempo posadas en árboles, donde son crípticas. Se estudió cinco especies en Costa Rica y Panama. Cada especie tiene una altura característica para posarse. Se posaron menos del lado sur de los árboles y evitaron las partes soleadas en días calurosos. Los machos dejaron su percha para volar hacia otras Hamadryas y hacia "mariposas" de cartón. Cuando se retiró los machos de los árboles éstos fueron tomados con mucha mayor frecuencia por otros machos. La mayoría de las interacciones aéreas de H. femnia se dieron entre las 1 3 : 00 y las 1 5 :00 h y fueron más frecuentes en la estación lluviosa. De noche, los machos compartían los árboles. El sonido característico del grupo es producido por venas modificadas en las alas delanteras.
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Palacios Espinosa X, González MI, Zani B. Las representaciones sociales del cáncer y de la quimioterapia en la familia del paciente oncológico. Av Psicol Latinoam 2015. [DOI: 10.12804/revistas.urosario.edu.co/apl/a.3287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Esta investigación cualitativa tuvo como objetivo develar las representaciones sociales (RS) del cáncer y la quimioterapia en 25 familiares de pacientes oncológicos adultos con quienes se realizaron entrevistas en profundidad y asociaciones libres. Se utilizó el programa Atlas.ti para el análisis de los datos, con base en la teoría de las RS. Se encontró que el familiar del paciente cumple un papel protagónico; tiene funciones diversas como el acompañamiento y la contención y está tan implicado como el paciente en el proceso de enfermedad. Así, los familiares representan el cáncer y la quimioterapia de manera predominantemente negativa, lo que favorece la presencia de ansiedad y la percepción de sufrimiento.
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González MI, Chen Mok M. El numero deseado de hijos en Costa Rica: 1993-1999. PSM 2014. [DOI: 10.15517/psm.v1i2.13930] [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: 11/10/2022] Open
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Iglesias E, Navallas M, Riaza L, Torrente-Segarra V, Bou R, Ricart S, González MI, Sánchez J, Antón J. PReS-FINAL-1013: Magnetic resonance imaging as a non-invasive tool to assess muscle edema in juvenile dermatomyositis. Return to normal after treatment. Pediatr Rheumatol Online J 2013. [PMCID: PMC4043662 DOI: 10.1186/1546-0096-11-s2-p10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Iglesias E, Torrente-Segarra V, Bou R, Ricart S, González MI, Sánchez J, Calzada J, Antón J. Non-systemic juvenile idiopathic arthritis outcome after reaching clinical remission with anti-TNF-α therapy: a clinical practice observational study of patients who discontinued treatment. Rheumatol Int 2013; 34:1053-7. [PMID: 24162563 DOI: 10.1007/s00296-013-2884-z] [Citation(s) in RCA: 17] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 10/11/2013] [Indexed: 12/15/2022]
Abstract
TNF-alpha-blocking agents (anti-TNF) used in juvenile idiopathic arthritis (JIA) are well established; however, time to withdraw is unclear. Neither prolonged nor tapering treatment seems to influence risk of relapse. Our aim was to assess relapse percentage after anti-TNF withdrawal of our non-systemic JIA patients after reaching clinical remission. A retrospective review of our non-systemic JIA patients in whom anti-TNF had been withdrawn due to inactive disease was achieved, between December 2000 and November 2011. We analyzed percentages of relapse according to JIA categories and antinuclear antibodies (ANA) positivity. n = 18 patients were included. Eighty-two percentage of patients relapsed after treatment withdrawal, and mean time to relapse was 3.04 months (SD 2.03). The percentage of relapse after anti-TNF discontinuation in the main JIA category was 88 % of negative rheumatoid factor polyarticular JIA and 80 % of persistent oligoarticular JIA. We did not find significant statistical differences according to ANA positivity (9 of 14 were ANA positive), and mean time to relapse (days) was 85.0 (SD 69.4) for ANA-positive versus 102.4 (SD 47.7) for ANA-negative patients (p = NS). Relapse percentage following anti-TNF discontinuation was high (82 %) and occurred within the first 3 months after it. No relationship regarding JIA subtype and ANA positivity was found.
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Affiliation(s)
- Estíbaliz Iglesias
- Pediatric Rheumatology Unit, Hospital Sant Joan de Déu-Universitat Barcelona, Passeig Sant Joan 2, 08950, Esplugues de Llobregat, Barcelona, (Catalunya), Spain,
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Ferrer-Ferrer M, Malespín-Bendaña W, Ramírez V, González MI, Carvajal A, Une C. Polymorphisms in genes coding for HSP-70 are associated with gastric cancer and duodenal ulcer in a population at high risk of gastric cancer in Costa Rica. Arch Med Res 2013; 44:467-74. [PMID: 24051039 DOI: 10.1016/j.arcmed.2013.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 01/29/2013] [Accepted: 08/22/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Costa Rica has among the highest incidence and mortality rates for gastric cancer worldwide. The reasons for this are largely unknown. Polymorphisms of inflammatory response genes including genes encoding heat shock proteins (HSP) have been shown to be associated with the risk of gastric cancer in some populations. This study addresses the possible association between the HSP70-2 +1267 and HSP70-Hom +2437 polymorphisms and the risk of developing gastric cancer in a high-risk population in Costa Rica. METHODS DNA from 39 individuals diagnosed with gastric cancer, 79 healthy controls, 55 individuals with chronic gastritis and 52 individuals with duodenal ulcer was genotyped for the polymorphisms HSP70-2 +1267 and HSP70-Hom +2437 by RFLP. Logistic regression analysis was used to determine possible associations with the diagnoses and lineal regression analysis to determine associations with blood pepsinogen (PGs) levels as measured by serology. RESULTS The GA genotype of HSP70-2 was associated with increased risk of gastric cancer (OR = 3.42; 95% CI = 1.27-9.21; p = 0.015) and duodenal ulcer (OR = 2.57; 95% CI = 1.03-6.36; p = 0.042) as compared to the GG genotype. Persons with C carrier genotypes of HSP70-Hom were significantly less susceptible to gastric cancer than those with the TT genotype (OR = 0.29; 95% CI = 0.09-0.87; p = 0.027). The C carrier genotype was associated with lower PGI concentrations but none of the polymorphisms were associated with PGI/PGII. CONCLUSIONS Polymorphisms of HSP70 genes are associated with the development of gastric cancer and duodenal ulcers in a population at high risk for gastric cancer in Costa Rica.
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Affiliation(s)
- Maura Ferrer-Ferrer
- Institute of Health Research (INISA), University of Costa Rica, San José, Costa Rica
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León JD, González MI, Gallardo JF. [Biogeochemical cycles in natural forest and conifer plantations in the high mountains of Colombia]. REV BIOL TROP 2011; 59:1883-1894. [PMID: 22208100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
Plant litter production and decomposition are two important processes in forest ecosystems, since they provide the main organic matter input to soil and regulate nutrient cycling. With the aim to study these processes, litterfall, standing litter and nutrient return were studied for three years in an oak forest (Quercus humboldtii), pine (Pinus patula) and cypress (Cupressus lusitanica) plantations, located in highlands of the Central Cordillera of Colombia. Evaluation methods included: fine litter collection at fortnightly intervals using litter traps; the litter layer samples at the end of each sampling year and chemical analyses of both litterfall and standing litter. Fine litter fall observed was similar in oak forest (7.5 Mg ha/y) and in pine (7.8 Mg ha/y), but very low in cypress (3.5 Mg ha/y). Litter standing was 1.76, 1.73 and 1.3 Mg ha/y in oak, pine and cypress, respectively. The mean residence time of the standing litter was of 3.3 years for cypress, 2.1 years for pine and 1.8 years for oak forests. In contrast, the total amount of retained elements (N, P, S, Ca, Mg, K, Cu, Fe, Mn and Zn) in the standing litter was higher in pine (115 kg/ha), followed by oak (78 kg/ha) and cypress (24 kg/ha). Oak forests showed the lowest mean residence time of nutrients and the highest nutrients return to the soil as a consequence of a faster decomposition. Thus, a higher nutrient supply to soils from oaks than from tree plantations, seems to be an ecological advantage for recovering and maintaining the main ecosystem functioning features, which needs to be taken into account in restoration programs in this highly degraded Andean mountains.
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Affiliation(s)
- Juan Diego León
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias Agropecuarias, Medellín, Colombia, Calle 59A 63-20, 14-330.
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Hinojosa MC, González MI, Martínez G, Ginés A. [Leishmanial parasitation of Kaposi's sarcoma in a HIV patient]. Rev Esp Quimioter 2011; 24:54-55. [PMID: 21412673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Nso-Roca AP, Larru B, Bellón JM, Mellado MJ, Ramos JT, González MI, Navarro ML, Muñoz-Fernández MÁ, de José MI. Niveles plasmáticos de antirretrovirales en niños con infección por el virus de la inmunodeficiencia humana. Influencia del género y de la edad. Enferm Infecc Microbiol Clin 2010; 28:278-83. [DOI: 10.1016/j.eimc.2009.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Revised: 06/28/2009] [Accepted: 09/09/2009] [Indexed: 11/24/2022]
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Martín-Dávila P, Fortún J, López-Vélez R, Norman F, Montes de Oca M, Zamarrón P, González MI, Moreno A, Pumarola T, Garrido G, Candela A, Moreno S. Transmission of tropical and geographically restricted infections during solid-organ transplantation. Clin Microbiol Rev 2008; 21:60-96. [PMID: 18202437 PMCID: PMC2223841 DOI: 10.1128/cmr.00021-07] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In recent years, the increasing number of donors from different regions of the world is providing a new challenge for the management and selection of suitable donors. This is a worldwide problem in most countries with transplantation programs, especially due to the increase in immigration and international travel. This paper elaborates recommendations regarding the selection criteria for donors from foreign countries who could potentially transmit tropical or geographically restricted infections to solid-organ transplant recipients. For this purpose, an extensive review of the medical literature focusing on viral, fungal, and parasitic infections that could be transmitted during transplantation from donors who have lived or traveled in countries where these infections are endemic has been performed, with special emphasis on tropical and imported infections. The review also includes cases described in the literature as well as risks of transmission during transplantation, microbiological tests available, and recommendations for each infection. A table listing different infectious agents with their geographic distributions and specific recommendations is included.
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Affiliation(s)
- P Martín-Dávila
- Servicio de Enfermedades Infecciosas, Hospital Ramón y Cajal, Ctra. Colmenar km. 9,100, 28034 Madrid, Spain.
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Isabel González M. Cómo diagnosticar y corregir el problema de la endogeneidad: el número de hijos tenidos en la predicción de las preferencias de fecundidad en Costa Rica. PSM 2006. [DOI: 10.15517/psm.v4i1.4562] [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: 11/10/2022] Open
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Isabel González M. Comparación de las preferencias de fecundidad entre mujeres costarricenses y mujeres nicaragüenses en Costa Rica, 1999. PSM 2004. [DOI: 10.15517/psm.v3i1.4568] [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: 11/10/2022] Open
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Mateos MV, Garcia-Sanz R, López-Pérez R, Balanzategui A, González MI, Fernández-Calvo J, Moro MJ, Hernández J, Caballero MD, González M, San Miguel JF. p16/INK4a gene inactivation by hypermethylation is associated with aggressive variants of monoclonal gammopathies. Hematol J 2002; 2:146-9. [PMID: 11920239 DOI: 10.1038/sj.thj.6200084] [Citation(s) in RCA: 28] [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] [Subscribe] [Scholar Register] [Received: 05/25/2000] [Accepted: 09/25/2000] [Indexed: 11/09/2022]
Abstract
INTRODUCTION A model of a stepwise malignant transformation has been proposed for the pathogenesis of monoclonal gammopathies. In this model, cell cycle regulators play a central role as a source of genetic events; particularly, p16/INK4a gene acts as a tumoral suppressor gene and, recently, inactivation of this gene through a methylation mechanism, has been observed in multiple myeloma patients. Under the diagnosis of monoclonal gammopathies there is a broad spectrum of disorders with very different outcomes, ranging from indolent courses, such as those of monoclonal gammopathy of undetermined significance, Waldeströn macroglobulinemia and smoldering multiple myeloma, to aggressive diseases such as symptomatic MM and primary plasma cell leukemia. To the best of our knowledge, the activity of p16 gene has not been evaluated and compared in these different subtypes of monoclonal gammopathies. MATERIALS AND METHODS The methylation status of the p16 gene was analysed in a group of 159 patients with monoclonal gammopathies (40 monoclonal gammopathy of uncertain significance, eight Waldenström Macroglobulinemia, eight smoldering multiple myeloma, 98 symptomatic multiple myeloma and five primary plasma cell leukemia) using three different assays (restriction enzymes and PCR or S-B and modification by sodium bisulphite). RESULTS Forty-one of 98 MM patients (41.8%) as well as four of the five (80%) primary PCL patients showed methylation of the p16 gene, while none of the patients with monoclonal gammopathy of undetermined significance, Waldenström Macroglobulinemia or smoldering multiple myeloma displayed a methylation status. CONCLUSION These findings suggest that the methylation of the p16 gene could be a relevant oncogenic event in the monoclonal gammopathies evolution being associated with the most aggressive forms.
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Affiliation(s)
- M V Mateos
- Hematology Service, University Hospital of Salamanca, Spain
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Molgatini S, Abate PF, Negroni MB, Macchi RL, González MI. Bacterial inhibition produced by substances for dentin pretreatment. Acta Odontol Latinoam 2002; 7:3-11. [PMID: 11885245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Dentin treatment before adhesion of composites is performed both to enhance adhesion and to remove the microbial contents of the smear layer. The purpose of these experiments was to evaluate the germicide potential of several dentin treatments used in adhesive systems and of some cleansing solutions. Different germs involved in caries processes were used (Candida Albicans, Streptococcus mutans and Actinomyces naeslundii) to prepare suspensions. Half a milliliter of each of the suspensions was transferred to test tubes and an equal volume of the following substances was added: Scotch Prep Dentin Primer (P), Gluma Cleanser (G), Cleaner Sol. (C), Tubulicid Blue (TB) and Red Label (TR), Blue Experimental Solution (SB) and Red Experimental Solution (SR) and sterile distilled water (control). The preparation was incubated at 37 degrees C for seven days to test viability. P, TR, TB and SB produced complete inhibition of germs tested. The results reveal that, "in vitro", not all the substances tested exert a germicide effect on the microorganisms analyzed.
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Affiliation(s)
- S Molgatini
- Dept. of Dental Materials and Microbiology, School of Dentistry, University of Buenos Aires, Argentina
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Negroni M, González MI, Levin B, Cuesta A, Iovanniti C. [Candida carriage in the oral mucosa of a student population: adhesiveness of the strains and predisposing factors]. Rev Argent Microbiol 2002; 34:22-8. [PMID: 11942080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The aim of this study was to establish oral carriage of Candida and possible factors associated to their virulence in young adults and their relation with local and general situations considered as predisposing factors. Samples were obtained from dorsum tongue in 70 students attending the Faculty of Dentistry (University of Buenos Aires) average age: 23, all in healthy oral conditions. Of these, 21.42% were Candida positive. These samples were seeded in CHROMagar. Candida identification was completed in milk agar and Fungichrom 1. The following species were identified: 11 Candida albicans (C.a), 2 Candida parapsilosis (C.p) and 1 Candida glabrata (C.g). In one case, 2 species (C.a and C.g) were isolated in the same sample. Virulence was determined as adherence capacity by biofilm or in vitro plaque formation and hydrophobicity. Different host factors were analyzed statistically to establish their importance as predisposing factors to allow Candida colonization. Adherence of C.a. was found to be similar in all C.a. strains, whereas significant differences were found between C.a. and C.p. and between C.a. and C.g. Only the antiseptic mouthrinse and the diet were significant among the considered factors.
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Affiliation(s)
- M Negroni
- Cátedra de Microbiología y Parasitología, Facultad de Odontología, Universidad de Buenos Aires, Marcelo T. Alvear 2142, piso 2o sector B, 1122 Buenos Aires, Argentina.
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Gutiérrez NC, Hernández JM, García JL, Almeida J, Mateo G, González MI, Hernández J, Fernández-Calvo J, San Miguel JF. Correlation between cytogenetic abnormalities and disease characteristics in multiple myeloma: monosomy of chromosome 13 and structural abnormalities of 11q are associated with a high percentage of S-phase plasma cells. Haematologica 2000; 85:1146-52. [PMID: 11064466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Cytogenetic studies in multiple myleoma (MM) are limited by the difficulties in obtaining metaphases that can be investigated and few studies have analyzed the relationship between cytogenetics and clinical disease characteristics. The aim of our study was to analyze the recurrent cytogenetic changes in MM and to correlate them with clinical and biological characteristics including the percentage of S-phase plasma cells (PCs). DESIGN AND METHODS Chromosomal abnormalities were analyzed in 86 patients with MM. In all patients, two types of cultures (5 d culture with interleukin-4 and unstimulated 72 h culture) were used for cytogenetic analysis. DNA content analysis (ploidy and cell cycle analysis) together with the most relevant clinical and biological disease features were studied. RESULTS Cytogenetic analysis was successful in 72 of the 86 patients (84%). Forty-seven patients (65%) had an abnormal karyotype. The most frequent trisomies involved chromosomes 3, 5, 9, 11, 15, 19, 22, 1, 7, 17, 18, and 21, and monosomies affected chromosomes 13 and 8, while structural changes involved chromosomes 1, 11, 14q32, 4p16 and 16q22-23. Patients with abnormal karyotype displayed a poor performance status, advanced stage, anemia and a high percentage of bone marrow plasma cells. In addition, MM patients with -13/13q- and 11q abnormalities showed a significantly higher proportion of S-phase PCs (p=0.02). INTERPRETATION AND CONCLUSIONS In summary, our study shows a relationship between unfavorable cytogenetics (-13/13q-/11q abnormalities) and a high percentage of S-phase PCs, a well-known adverse prognostic factor.
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Affiliation(s)
- N C Gutiérrez
- Servicio de Hematología, Hospital Universitario de Salamanca and Centro de Investigación del Cáncer (CIC), Universidad de Salamanca-CSIC, Spain
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Hernández R, del Cañizo MC, López C, González MI, Vázquez ML, Caballero MD, San Miguel JF. Pathologic rupture of the spleen during induction with ATRA in a patient with acute promyelocytic leukemia. Med Oncol 2000; 17:337-9. [PMID: 11114715 DOI: 10.1007/bf02782201] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pathological rupture of the spleen is a rare but well recognized complication in hematological malignancies. Early clinical recognition of this life-threatening complication is necessary for rapid intervention. Here, we report on the case of a 26-year-old woman with acute promyelocytic leukemia who presented rupture of the spleen on day +2 of treatment with ATRA plus idarrubicin. In patients with acute leukemia, the presence of a painful abdomen and a sudden drop in hemoglobin levels, should alert of a possible splenic rupture, even without additional symptoms. This would facilitate an early treatment intervention with no modification to the chemotherapy schedule.
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Affiliation(s)
- R Hernández
- Servicio de Hematología, Hospital Universitario de Salamanca, Spain.
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González MI, Caballero D, López C, Alburquerque T, Hernández R, de la Loma A, Cañizo C, Vázquez L, San Miguel JF. Cerebral toxoplasmosis and Guillain-Barré syndrome after allogeneic peripheral stem cell transplantation. Transpl Infect Dis 2000; 2:145-9. [PMID: 11429026 DOI: 10.1034/j.1399-3062.2000.020308.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report an unusual case of cerebral toxoplasmosis associated with Guillain-Barré syndrome (GBS) in a 25-year-old patient diagnosed with chronic myelogenous leukaemia (CML), who underwent a mismatched allogeneic peripheral stem cell transplantation (PSCT). On day +83 he started with fever, and 7 days later tremor, muscular weakness, diplopia, dysarthria, respiratory difficulty, and universal arreflexia appeared, compatible with GBS. As the patient had a positive cytomegalovirus (CMV) antigenemia, this was the aetiology suspected for his neurologic findings, but specific treatment failed to improve his clinical situation, and he died on day +123. Necropsy demonstrated cerebral toxoplasmosis and axonal degeneration of nerve roots compatible with the axonal form of GBS. Interestingly, the polymerase chain reaction (PCR) signal for Toxoplasma gondii in two different cerebrospinal fluid (CSF) samples had been negative. In addition, this case showed unique magnetic resonance imaging (MRI) abnormalities. We conclude that a negative PCR on CSF cannot exclude toxoplasmosis in a transplant patient, and we emphasise the importance of considering Toxoplasma as an aetiology of fever and neurological symptoms in the transplant setting.
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Affiliation(s)
- M I González
- Servicio de Hematología, Hospital Clínico Universitario, Salamanca, Spain
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Abstract
The effect of glutamate receptor activation on the high-affinity sodium-dependent glutamate transport expressed in chick Bergmann glia cells was examined. Pre-exposure to glutamate produced a time- and dose-dependent decrease in 3H-labeled D-aspartate uptake. This effect could not be reproduced by selective glutamate receptor agonists. Furthermore, it was insensitive to both ionotropic and metabotropic glutamate receptor antagonists. Replacement of extracellular sodium ions with choline in the preincubation media, abolished the reduction of the uptake. When the cells were pre-exposed to competitive transportable inhibitors of the transporter, such as D-aspartate, DL-threo-hydroxyaspartate (DL-THA), and aspartate-beta-hydroxamate (ABH), the glutamate effect was mimicked. From saturation experiments, it was found that the reduction on the uptake, after glutamate treatment, is related to an increase in K(m). Interestingly, the effect is blocked by staurosporine, a Ca(2+)/diacylglycerol-dependent protein kinase (PKC) inhibitor. The present findings suggest that glutamate regulates its transport in a non-receptor fashion, a phenomena that is most probably linked to changes induced by the translocation process of the substrate through the transporter.
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Affiliation(s)
- M I González
- Departamento de Genética y Biología Molecular, Cinvestav-IPN, Apartado Postal 14-740, DF 07000, México, Mexico
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González MI, Caballero D, Vázquez L, Cañizo C, Hernández R, López C, Izarra A, Arroyo JL, González M, García R, San Miguel JF. Allogeneic peripheral stem cell transplantation in a case of hereditary sideroblastic anaemia. Br J Haematol 2000; 109:658-60. [PMID: 10886220 DOI: 10.1046/j.1365-2141.2000.02050.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report on a case of pyridoxine refractory hereditary sideroblastic anaemia (HSA) in a 19-year-old man who underwent peripheral blood stem cell transplantation (PBSCT) from his HLA-identical brother. By using short tandem repeat polymorphism, 100% donor cells were observed in peripheral blood on day +21; bone marrow showed mixed chimaerism from day +21 to day +221, when 100% cells of donor origin were observed. The patient developed extensive chronic graft-versus-host disease with favourable response to treatment. When the haemoglobin range was normal, a programme of phlebotomies reduced serum ferritin levels. Three years after transplantation, the patient has an ECOG rating of 0, with completely normal haemoglobin values (15 g/dl). To our knowledge, this is the first PBSCT reported in a case of hereditary sideroblastic anaemia.
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Affiliation(s)
- M I González
- Servicio de Hematología, Hospital Clínico Universitario, Salamanca, Spain
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Fernandes C, González MI, Wilson CA, File SE. Factor analysis shows that female rat behaviour is characterized primarily by activity, male rats are driven by sex and anxiety. Pharmacol Biochem Behav 1999; 64:731-8. [PMID: 10593196 DOI: 10.1016/s0091-3057(99)00139-2] [Citation(s) in RCA: 186] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This experiment explored sex differences in behaviour using factor analysis to describe the relationship between different behavioral variables. A principal component solution with an orthogonal rotation of the factor matrix was used, ensuring that the extracted factors are independent of one another, and thus reflect separate processes. In the elevated plus-maze test of anxiety, in male rats factor 1 accounted for 75% of the variance and reflected anxiety, factor 2 represented activity, and accounted for 24% of the variance. This contrasted with the finding in female rats in which factor 1 was activity, accounting for 57% of the variance, with the anxiety factor accounting for only 34% of the variance. When behaviour in both the plus-maze and holeboard were analysed, a similar sex difference was found with anxiety emerging as factor 1 in males and holeboard activity as factor 1 in females. Locomotor activity in the inner portion of the holeboard loaded on the anxiety factor for males, but on activity for females. When behaviours in the plus-maze and sexual orientation tests were analysed, anxiety emerged as factor 1 in males, sexual preferences factor 2, and activity factor 3. In females, activity was factor 1, sexual preference factor 2, anxiety factor 3, and social interest factor 4. These results suggest caution should be exercised in interpreting the results from female rats in tests validated on males because the primary controlling factor may be different.
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Affiliation(s)
- C Fernandes
- Psychopharmacology Research Unit, Neuroscience Research Centre, GKT School of Biomedical Sciences, King's College London, Guy's Campus, UK
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Abstract
The regulation of the Na(+)-dependent high affinity glutamate/aspartate transporter system expressed in cultured Müller glia cells from chick retina was studied. Treatment of the cells with the Ca(2+)/diacylglycerol dependent protein kinase C (PKC) activator, phorbol 12-tetradecanoil-13-acetate (TPA) produced a decrease in [(3)H]D-aspartate uptake which was reversed by staurosporine and partially by H7 [1-(5-isoquinolinesulfonyl)-2-methylpiperazine dihydrochoride], two PKC inhibitors. Long-term treatment with TPA resulted in a drastic decrease in the uptake activity, correlated with a substantial fall in the expression of the transporter protein. These findings suggest that PKC is involved in transport modulation at two different levels: phosphorylation and transporter expression in retinal Müller glial cells.
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Affiliation(s)
- M I González
- Departamento de Genética y Biología Molecular, CINVESTAV-IPN, Apartado Postal 14-740, México D.F. 07000, Mexico
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Abstract
Candida albicans (Ca), Staphylococcus aureus (Sa), Streptococcus sanguis (Ss), Actinomyces naeslundii (An), Actinomyces odontolyticus (Ao), Porphyromona spp (P spp), Candida glabrata (Cg), Candida krusei (Ck), and Rhodotorula spp (R spp) were tested with equal pieces of biodegradable membranes. Membranes pretreated with saliva or clorhexidine and nontreated control membranes were tested in three different culture media containing 0.1 mL homologous suspension for each strain under study. Incubation was performed at 37 degrees C for 48 hours for aerobiosis and for five days for anaerobiosis. Macroscopy and microscopy were carried out. Membranes were removed, washed, and resuspended. Samples were sonicated, and the supernatant was disseminated on brain heart infusion broth or blood agar. Incubation was repeated, colony-forming unit counts were performed, and statistical analysis was carried out using analysis of variance transforming results to Log10 (x + 1), the highest interaction level was used to calculate standard error. Orthogonal contrast was used to compare the different microorganisms under study. Highest adhesion was found with Ca, Cg, Ck, Sa, and Ss. A sufficient quantity of Actinomyces could not be recovered from the membranes. Results with P spp were poor, confirming lower gram-negative adhesion. Replicate flasks with Ss and Ca were cultivated. Membranes were removed after washing and subjected to scanning electron microscopy, as were untreated control pieces. A cavelike surface was observed. Streptococcus sanguis adhering to the membranes showed extracellular projections. Candida and gram-positive cocci showed great recovery capacity.
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Affiliation(s)
- S L Molgatini
- Microbiology Department, School of Dentistry, University of Buenos Aires, Argentina
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Wong E, Antillón F, Glenn E, González MI. [Microbiologic depuration of Anadara tuberculosa (Mollusca: Arcidae)]. REV BIOL TROP 1997; 45:1445-52. [PMID: 9698943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In Costa Rica the mollusk Anadara tuberculosa represents a risk for human health due to the contamination of the growing waters and the fact that its is consumed raw. The families depending on the income obtained through commercialization of these animals have a low education and economic status. Therefore, it is of great importance to develop and evaluate simple methods of depuration that could be easily used by these families to make these mollusks safe for consumption. Bottles containing 11 of saline solution (25g/l) were prepared in duplicates to test the bactericidal effect of acetic acid. The solution in each bottle was adjusted to ph 4.5, 5.0 or 5.5 or held at ph of 7.0 or 8.0 for the controls. The solution in each bottle was then inoculated with approximately 1 X 104 cfu/ml of coliforms. Counts of coliforms were determined for each bottle 0, 1, 2, 4 and 8 hours after inoculation. For the depuration studies, specimens with diameters ranging from 4.0 to 4.5 cm were collected from a harvester at the estuary of Puntarenas, Gulf of Nicoya. Fifty specimens each were depurated in separate tanks containing 25 1 of oxygenated saline solution adjusted with acetic acid to an initial ph of 4.5 (treatment) or non adjusted ph of 8.0 (control). Counts of Enterobacteriaceae were determined, in duplicates, every 12 hr for 48 hr. An additional fifty animals were depurated using the defined method and tested to determine if they met international standards of microbiological quality for aerobic plate count, Enterobacteriaceae count, Escherichia coli count and presence of Salmonella. A sensory evaluation using a triangle test was performed to compare a typical dish prepared with depurated or non-depurated animals. A significant coliform reduction was determined in a saline solution (25 g/l) at a pH range of 4.5 to 5.5. This reduction, during 8 hr, was higher in the acid treatments compared to the controls. During depuration, the elimination of Enterobacteriaceae bacteria was faster when acetic was used (initial ph = 4.5) than when it was not. This elimination was more important the first 24 hr, time defined as adequate for the application of the method. The method has the advantage of transforming the bivalve in a product that is safe for human consumption, since it guarantees that the international standards of microbiological quality, for raw and depurated mollusks, are reached. On the other hand, the sensory qualities of a typical dish prepared with depurated animals are not affected by the method, which can be easily implemented and applied by the people that work in the extraction of this mollusk.
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Affiliation(s)
- E Wong
- Escuela de Tecnología de Alimentos, Universidad de Costa Rica, Costa Rica
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42
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Abstract
The effects of phorbol 12-tetradecanoyl-13-acetate (TPA) and dibutyryl cAMP on the glutamate transport present in chick Bergmann glial cell (BGC) cultures were examined. TPA produced a significant decrease in [3H]-D-aspartate uptake, while dibutyryl cAMP treatment elicited a slight reduction in the transport. This effect was dose and time dependent and sensitive to staurosporine, a Ca2+/diacylglycerol-dependent protein kinase C (PKC) inhibitor. Long-term exposure of the culture to TPA results in a dramatic fall of the transporter activity and a decrease in the amount of the transporter protein. These findings suggest that PKC is involved in transport modulation and possibly in the regulation of the transporter gene expression.
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Affiliation(s)
- M I González
- Departamento de Genética y Biología Molecular, CINVESTAV-IPN, México D.F., México
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Abstract
In this study we investigated the effects of maternal delta 9-tetrahydrocannabinol on the developing serotonergic system. A daily dose of delta 9-tetrahydrocannabinol (5 mg/kg body weight) was administered p.o. to pregnant rats from gestational day 5 to postnatal day 1. Levels of indolamines were measured in four brain areas of the offspring on the day before or after birth. Levels of indolamines depended on the cerebral area, sex and pre- or postnatal age. Maternal exposure to delta 9-tetrahydrocannabinol decreased diencephalic levels of 5-hydroxytryptamine (5-HT), males being more susceptible than females. These perinatal changes could be responsible for the long-term neurophysiological alterations produced by cannabinoids.
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Affiliation(s)
- F Molina-Holgado
- Departamento Biologia Animal II, Facultad CC. Biologicas, Universidad Complutense, Madrid, Spain
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González MI, Albonetti E, Siddiqui A, Farabollini F, Wilson CA. Neonatal organizational effects of the 5-HT2 and 5-HT1A subsystems on adult behavior in the rat. Pharmacol Biochem Behav 1996; 54:195-203. [PMID: 8728558 DOI: 10.1016/0091-3057(95)02134-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Males, females, neonatally androgenized females, and neonatally castrated males were treated over the second week of life with 0.25 mg/kg of either the 5-HT2 agonist 1-(2,5-dimethoxy-3-iodophenyl)-2-aminopropane HCl (DOI), the 5-HT2 antagonist ritanserin (Rit), the 5-HT1A agonist 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), or the 5-HT1A antagonist WAY100135 (WAY). Exploration, anxiety, sociosexual preferences, and sexual behavior were measured in adulthood. Agents acting on 5-HT1A receptors do not appear to affect organization of any of the behavioral systems studied. DOI increased exploratory activity but in females only, which suggests that testosterone antagonizes the stimulatory effect of 5-HT2 activity on exploration. Neonatal ritanserin selectively reduced anxiety in females, and DOI had a similar effect in androgenized females. This indicates that neonatal 5-HT2 activity is anxiogenic in normal females, anxiolytic in androgenized females, and has no effect on anxiety in males. Males and androgenized females both showed a preference for the female teaser that was abolished by the 5-HT2 agonist, DOI. These results point out that 5-HT2 activity selectively suppresses heterosexual preference induced in the presence of neonatal testosterone. DOI also reduced both male sexual behavior in males and female sexual behavior in androgenized females. Thus, the 5-HT2 system antagonizes the action of testosterone in stimulating heterosexual orientation and sexual activity, and this is independent of genetic sex.
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Affiliation(s)
- M I González
- Department of Obstetrics and Gynaecology, St. George's Hospital Medical School, London, UK
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Albonetti E, González MI, Siddiqui A, Wilson CA, Farabollini F. Involvement of the 5-HT1A subtype receptor in the neonatal organization of agonistic behaviour in the rat. Pharmacol Biochem Behav 1996; 54:189-93. [PMID: 8728557 DOI: 10.1016/0091-3057(95)02115-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
5-hydroxytryptamine (5-HT) interacts with testosterone (T) in the development of a number of neuronal systems controlling sexually dimorphic adult behaviours. In this report, we investigated this interaction on the organization of agonistic behaviour in males, females, androgenized females (250 micrograms/pup of T proprionate on the day of birth), and males castrated on the day of birth. We have shown previously that manipulating 5-HT2 activity over the 2nd week of life modulates adult agonistic behaviour, depending on genetic sex and the presence of T. In this report, we investigated the effects seen in adulthood of a 5-HT1A agonist [8-OH-DPAT, 0.25 mg/kg, intraperitoneally (i.p.)] and antagonist (WAY100135, 0.25 mg/kg, i.p.) given over days 8-16 postpartum. The test for agonistic behaviour was carried out in a neutral territory against a matched conspecific, and introductory, offensive and defensive activities were note. Results show that neonatal administration of the 5-HT1A antagonist WAY100135 increases introductory activity and defense in the presence of neonatal T, independent of genetic sex, because these effects were seen in sham-castrated males and androgenized females. Offence followed a similar pattern, in that it was increased by WAY100135, but only in males. In the case of defence, the effects of the antagonist were reinforced by the action of the agonist (8-OH-DPAT) in both males and females, indicating an inhibitory role of 5-HT1A perinatal activity on defence in the presence of malelike levels of circulating T and a facilitatory role when levels of T are low or negligible. These findings indicate that 5-HT1A activity is involved in the development of agonistic behaviour and the effects are influenced by T. The results also show that the offensive and defensive facets of agonistic activity are controlled differently.
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Affiliation(s)
- E Albonetti
- Institute of Physiology, University of Siena, Italy
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Abstract
We have reported that marihuana and its principal psycoactive compound, delta 9-tetrahydrocannabinol (delta 9-THC) produce alterations in several cerebral areas after acute treatment. Based on the involvement of 5-hydroxytryptamine (5-HT) on memory and learning and the reported effects of delta 9-THC on short-term memory, we designed an experiment to evaluate the memory performance and its possible relationship with serotonergic alterations after delta 9-THC administration. Male Wistar rats received an acute oral dose of THC (5 mg/kg). Short-Term memory was tested on a radial 8-arm maze with a 5 s delay, after 35 days of training. The animals were food deprived and adjusted for growth. 5-HT and its metabolite, 5-HIAA, levels were measured in cerebral cortex, dorsal hippocampus, ventral hippocampus, rostral neoestriatum and amygdala basal nucleus, by HPLC-ED. The experiment indicates an impairment of short-term memory in the radial maze test after delta 9-THC administration. The control group performed the test without errors, while the treated group made a significant number of errors (Z = 0.019, Mann-Whitney test). This behavioral effect did not seem to be related to serotonergic alterations, as the 5-HT turnover rate was not different between treated and control animals.
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Affiliation(s)
- F Molina-Holgado
- Dpt. Biología Animal II, Facultad de CC. Biológicas, Universidad Complutense, Madrid, Spain
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Abstract
In this study we investigated the sexually dimorphic anxiety response to a novel environment in the absence of estrogens neonatally or in adulthood. There was a sexual dimorphism in the plus-maze test after the open-field test, females being more active and less anxious. In the absence of estrogens neonatally but not in the adulthood, the activity levels were similar to those shown by females, while the anxiety level was similar to males. These results suggest the need of a normal estrogen environment during the critical period of development for the normal differentiation of female anxiety responses to a novel environment.
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Affiliation(s)
- M L Leret
- Departamento Biología Animal II, Facultad de CC. Biológicas, Universidad Complutense, Madrid, Spain
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Molina-Holgado F, Molina-Holgado E, Leret ML, González MI, Reader TA. Distribution of indoleamines and [3H]paroxetine binding in rat brain regions following acute or perinatal delta 9-tetrahydrocannabinol treatments. Neurochem Res 1993; 18:1183-91. [PMID: 7504790 DOI: 10.1007/bf00978372] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The effects of delta 9-tetrahydrocannabinol (delta 9-THC) administration on the central serotoninergic system were evaluated by biochemical assays of tissue levels of indoleamines; a measure of the serotonin (5-HT) innervation was obtained by using [3H]paroxetine as a marker of 5-HT uptake sites. Two different delta 9-THC treatments were chosen, i.e.: acute and chronic perinatal maternal exposure. Following acute treatment (5 mg/kg), the 5-HT content increased in dorsal hippocampus (+35%), Substantia nigra (+61%) and neostriatum (+62%) but remained unchanged in cingulate cortex, Raphe nuclei, Locus coeruleus and anterior hypothalamus. Endogenous 5-hydroxyindole-3-acetic acid (5-HIAA) decreased in anterior hypothalamus (-23%) and Raphe nuclei (-21%). Following maternal exposure to delta 9-THC (5 mg/kg per day; from gestational day 13 to postnatal day 7), levels of 5-HT were increased in the neostriatum (+22%) but decreased in anterior hypothalamus (-25%), Raphe nuclei (-29%) and Locus coeruleus (-20%) of the litters. Tissue 5-HIAA was increased in anterior hypothalamus (+23%) and Substantia nigra (+48%). There were no changes in 5-HT uptake site density, determined by [3H]paroxetine binding, except for an increase (+50%) in the cingulate cortex of perinatal-treated rats when compared to acutely-treated animals. The present results show that acute and maternal exposure to delta 9-THC produced different effects on the central 5-HT system of the offspring, with a clear regional specificity, but with no changes in the densities of 5-HT uptake sites.
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Affiliation(s)
- F Molina-Holgado
- Departamento de Biología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, Spain
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Abstract
Previous studies performed in our laboratory showed the importance of the effects that the absence of maternal adrenal hormones have on fetal brain. In the present study we investigated the effect of adrenal deprivation during gestation on the fetal catecholamines development in several cerebral areas. Fetuses from both control and adrenalectomized mothers from the first day of gestation were removed on the 20th embryonary day. Plasma corticosterone levels were significantly lower in the maternal serum of adrenalectomized rats, while the contents were non significantly higher in the adrenalectomized-mothers group of fetuses. Catecholamine contents in diencephalon, metencephalon, mesencephalon and telencephalon were measured by HPLC-ED. The results obtained showed that when the development of the catecholaminergic systems was previous enough to the fetal adrenal function, and under maternal adrenal deprivation conditions, the lack of corticosterone promotes an increase in the level of the catecholamines, as observed in the diencephalic NA, the earlier in maturational process. In those areas where the maturation starts at the same time than the fetal adrenal hypersecretion, no changes were observed. In the cortex, where both DA and NA develop later, the corticosterone produces an inhibition in the proliferation of the catecholaminergic neurons, showing decreased telencephalic levels of both catecholamines.
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Affiliation(s)
- M L Leret
- Departamento de Biología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain
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Verdugo C, País E, Calvo C, Donoso J, Rojas N, Martínez C, Meza M, Asenjo S, Gleisner A, González MI. [Persistent microalbuminuria in insulin-dependent diabetics and cardiovascular risk factors]. Rev Med Chil 1992; 120:755-60. [PMID: 1341815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A possible association of cardiovascular risk factors and early diabetic nephropathy was investigated in 32 patients. Microalbuminuria (radioimmunoassay), total and HDL cholesterol and triglycerides (enzymatic methods), glycosylated hemoglobin (colorimetric methods), Apo A1 and B (immunonephelometric) and LDL were measured. Microalbuminuria was present in 28% of patients. Compared to subjects with no microalbuminuria they had increased levels of cholesterol (200.2 +/- 13.5 (SE) vs 168.6 +/- 9.4 mg/dl, p < 0.025) and LDL cholesterol (171.9 +/- 14.1 vs 137.4 +/- 9.1 mg/dl, p < 0.025). Systolic blood pressure was also higher in patients with microalbuminuria (127.8 +/- 3.9 vs 114.5 +/- 2.8 mmHg, p < 0.01). Microalbuminuria was correlated to the level of diastolic blood pressure (r = 0.74, p < 0.025). Thus, persistent microalbuminuria in insulin dependent diabetic patients is associated to cardiovascular risk factors which may explain the increased cardiovascular morbidity and mortality in these patients.
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Affiliation(s)
- C Verdugo
- Departamento Medicina Interna, Facultad de Medicina, Universidad de Concepción, Chile
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