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Martínez-López MV, McLaughlin L, Molina-Pérez A, Pabisiak K, Primc N, Randhawa G, Rodríguez-Arias D, Suárez J, Wöhlke S, Delgado J. Correction to: Mapping trust relationships in organ donation and transplantation: a conceptual model. BMC Med Ethics 2024; 25:26. [PMID: 38443915 PMCID: PMC10913201 DOI: 10.1186/s12910-024-01026-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024] Open
Affiliation(s)
- María Victoria Martínez-López
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain.
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy.
| | - Leah McLaughlin
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- School of Medical and Health Sciences, Bangor University, Bangor, UK
| | - Alberto Molina-Pérez
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy.
- Instituto de Estudios Sociales Avanzados (IESA), CSIC, Córdoba, Spain.
| | - Krzysztof Pabisiak
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Dept Nephrology Transplantation and Internal Medicine, Pomeranian Medical University, Szczecin, Poland
| | - Nadia Primc
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Institute of History and Ethics of Medicine, Medical Department, Heidelberg University, Heidelberg, Germany
| | - Gurch Randhawa
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Institute for Health Research, University of Bedfordshire, Bedfordshire, UK
| | - David Rodríguez-Arias
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
| | - Jorge Suárez
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
| | - Sabine Wöhlke
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Department Health Sciences, Faculty Life Science, Hamburg University of Applied Sciences, Hamburg, Germany
| | - Janet Delgado
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
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Sánchez-Díaz M, Flórez Á, Ara-Martín M, Arias-Santiago S, Botella-Estrada R, Cañueto J, Carretero-Hernández G, Coto-Segura P, de Eusebio-Murillo E, García-Latasa de Araníbar FJ, García-Patos Briones V, Gardeazabal García J, Gómez-Fernández C, Hernández-Ostiz S, Izu Belloso R, López-Ávila A, Manchado López P, Martín-Santiago A, Martinez de Espronceda Ezquerro I, Mateu-Puchades A, Mercader-García P, Notario Rosa J, Palacio Aller L, Pérez-Hortet C, Quintana-Castanedo L, Rivera R, Rocamora Duran V, Rodríguez-Nevado IM, Ruiz-Villaverde R, Suárez J, Trasobares-Marugán L, Vizán-de Uña C, Yanguas I, Zulaica-Garate A, García-Doval I, Descalzo MÁ, Grau-Pérez M, Carrascosa-Carrillo JM. [Translated article] Requirements for Accessing New Dermatology Drugs in Spain: Results of the EQUIDAD Study. Actas Dermosifiliogr 2024; 115:T237-T245. [PMID: 38242435 DOI: 10.1016/j.ad.2024.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/09/2023] [Indexed: 01/21/2024] Open
Abstract
BACKGROUND Although the Spanish Ministry of Health prepares national therapeutic positioning reports (TPRs) and drug reimbursement policies, each of the country's 17 autonomous communities (ACs) is responsible for health care services and prescription requirements in its territory. The aim of the EQUIDAD study was to describe and explore potential differences in prescription requirements for new dermatology drugs across the autonomous communities. MATERIAL AND METHODS Cross-sectional study conducted in April and May, 2023. Two dermatologists with management responsibilities from each autonomous community reported on territorial and more local prescription requirements for drugs covered by national TPRs issued between 2016 and 2022. RESULTS Thirty-three researchers from 17 autonomous communities participated. The data submitted revealed between-community inequities in access to new drugs. Overall, 64.7% of the regions imposed additional prescription requirements to those mentioned in the TPRs for psoriasis. This percentage was lower for atopic dermatitis (35.3%) and melanoma (11.8%). The most common requirement for accessing a new drug was a previous prescription for another drug. Differences and additional requirements were also detected at the local level (i.e., differences between hospitals within the same autonomous community). CONCLUSIONS Spain's autonomous communities have multiple regional and local prescription requirements that are not aligned with national TPR recommendations. These differences result in inequitable access to new drugs for both patients and practitioners across Spain.
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Affiliation(s)
- M Sánchez-Díaz
- Unidad de Investigación, Academia Española de Dermatología y Venereología, Madrid, Spain; Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria IBS, Granada, Spain
| | - Á Flórez
- Servicio de Dermatología, Complejo Hospitalario Universitario de Pontevedra, Grupo de Investigación DIPO, IIS Galicia Sur-SERGAS-UVIGO, Pontevedra, Spain
| | - M Ara-Martín
- Servicio de Dermatología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain
| | - S Arias-Santiago
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria IBS, Granada, Spain
| | - R Botella-Estrada
- Servicio de Dermatología, Hospital Universitario La Fe, Valencia, Spain
| | - J Cañueto
- Servicio de Dermatología, Complejo Asistencial Universitario de Salamanca, Salamanca, Spain
| | - G Carretero-Hernández
- Servicio de Dermatología, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas de Gran Canaria, Spain
| | - P Coto-Segura
- Servicio de Dermatología, Hospital Vital Alvarez-Buylla, Mieres, Asturias, Spain
| | - E de Eusebio-Murillo
- Servicio de Dermatología, Hospital Universitario de Guadalajara, Guadalajara, Spain
| | | | - V García-Patos Briones
- Servicio de Dermatología, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - J Gardeazabal García
- Servicio de Dermatología, Hospital Universitario Cruces, Barakaldo, Vizcaya, Spain
| | - C Gómez-Fernández
- Servicio de Dermatología, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, Spain
| | - S Hernández-Ostiz
- Servicio de Dermatología, Hospital de Calahorra, Calahorra, La Rioja, Spain
| | - R Izu Belloso
- Servicio de Dermatología, Hospital Universitario Basurto, Bilbao, Vizcaya, Spain
| | - A López-Ávila
- Servicio de Dermatología, Hospital General Universitario Santa María del Rosell, Cartagena, Spain
| | - P Manchado López
- Servicio de Dermatología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - A Martín-Santiago
- Servicio de Dermatología, Hospital Universitari Son Espases, Palma de Mallorca, Baleares, Spain
| | | | - A Mateu-Puchades
- Servicio de Dermatología, Hospital Universitario Doctor Peset, Valencia, Spain
| | | | - J Notario Rosa
- Servicio de Dermatología, Hospital Universitario de Bellvitge, L' Hospitalet de Llobregat, Barcelona, Spain
| | - L Palacio Aller
- Servicio de Dermatología, Hospital de Cabueñes, Gijón, Asturias, Spain
| | - C Pérez-Hortet
- Servicio de Dermatología, Hospital Universitario de Toledo, Toledo, Spain
| | - L Quintana-Castanedo
- Servicio de Dermatología, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, Spain
| | - R Rivera
- Servicio de Dermatología, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - V Rocamora Duran
- Servicio de Dermatología, Hospital de Manacor, Manacor, Baleares, Spain
| | - I M Rodríguez-Nevado
- Servicio de Dermatología, Complejo Hospitalario Universitario de Badajoz, Badajoz, Spain
| | - R Ruiz-Villaverde
- Servicio de Dermatología, Hospital Universitario San Cecilio, Granada, Spain
| | - J Suárez
- Servicio de Dermatología, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - L Trasobares-Marugán
- Servicio de Dermatología, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - C Vizán-de Uña
- Servicio de Dermatología, Hospital Universitario de Cáceres, Cáceres, Spain
| | - I Yanguas
- Servicio de Dermatología, Hospital Universitario de Navarra, Pamplona, Spain
| | - A Zulaica-Garate
- Servicio de Dermatología, Hospital do Meixoeiro, Vigo, Pontevedra, Spain
| | - I García-Doval
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, Spain
| | - M Á Descalzo
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, Spain
| | - M Grau-Pérez
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, Spain; Servicio de Dermatología, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain.
| | - J M Carrascosa-Carrillo
- Servicio de Dermatología, Hospital Universitario Germans Trias i Pujol, Badalona, Barcelona, Spain
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Sánchez-Díaz M, Flórez Á, Ara-Martín M, Arias-Santiago S, Botella-Estrada R, Cañueto J, Carretero-Hernández G, Coto-Segura P, de Eusebio-Murillo E, García-Latasa de Araníbar FJ, García-Patos Briones V, Gardeazabal García J, Gómez-Fernández C, Hernández-Ostiz S, Izu Belloso R, López-Ávila A, Manchado López P, Martín-Santiago A, Martinez de Espronceda Ezquerro I, Mateu-Puchades A, Mercader-García P, Notario Rosa J, Palacio Aller L, Pérez-Hortet C, Quintana-Castanedo L, Rivera R, Rocamora Duran V, Rodríguez-Nevado IM, Ruiz-Villaverde R, Suárez J, Trasobares-Marugán L, Vizán-de Uña C, Yanguas I, Zulaica-Garate A, García-Doval I, Descalzo MÁ, Grau-Pérez M, Carrascosa-Carrillo JM. Requirements for Accessing New Dermatology Drugs in Spain: Results of the EQUIDAD Study. Actas Dermosifiliogr 2024; 115:237-245. [PMID: 37890617 DOI: 10.1016/j.ad.2023.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/26/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Although the Spanish Ministry of Health prepares national therapeutic positioning reports (TPRs) and drug reimbursement policies, each of the country's 17 autonomous communities (ACs) is responsible for health care services and prescription requirements in its territory. The aim of the EQUIDAD study was to describe and explore potential differences in prescription requirements for new dermatology drugs across the autonomous communities. MATERIAL AND METHODS Cross-sectional study conducted in April and May, 2023. Two dermatologists with management responsibilities from each autonomous community reported on territorial and more local prescription requirements for drugs covered by national TPRs issued between 2016 and 2022. RESULTS Thirty-three researchers from 17 autonomous communities participated. The data submitted revealed between-community inequities in access to new drugs. Overall, 64.7% of the regions imposed additional prescription requirements to those mentioned in the TPRs for psoriasis. This percentage was lower for atopic dermatitis (35.3%) and melanoma (11.8%). The most common requirement for accessing a new drug was a previous prescription for another drug. Differences and additional requirements were also detected at the local level (i.e., differences between hospitals within the same autonomous community). CONCLUSIONS Spain's autonomous communities have multiple regional and local prescription requirements that are not aligned with national TPR recommendations. These differences result in inequitable access to new drugs for both patients and practitioners across Spain.
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Affiliation(s)
- M Sánchez-Díaz
- Unidad de Investigación, Academia Española de Dermatología y Venereología, Madrid, España; Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria IBS, Granada, España
| | - Á Flórez
- Servicio de Dermatología, Complejo Hospitalario Universitario de Pontevedra, Grupo de Investigación DIPO, IIS Galicia Sur-SERGAS-UVIGO, Pontevedra, España
| | - M Ara-Martín
- Servicio de Dermatología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, España
| | - S Arias-Santiago
- Servicio de Dermatología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria IBS, Granada, España
| | - R Botella-Estrada
- Servicio de Dermatología, Hospital Universitario La Fe, Valencia, España
| | - J Cañueto
- Servicio de Dermatología, Complejo Asistencial Universitario de Salamanca, Salamanca, España
| | - G Carretero-Hernández
- Servicio de Dermatología, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas de Gran Canaria, España
| | - P Coto-Segura
- Servicio de Dermatología, Hospital Vital Alvarez-Buylla, Mieres, Asturias, España
| | - E de Eusebio-Murillo
- Servicio de Dermatología, Hospital Universitario de Guadalajara, Guadalajara, España
| | | | - V García-Patos Briones
- Servicio de Dermatología, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, España
| | - J Gardeazabal García
- Servicio de Dermatología, Hospital Universitario Cruces, Barakaldo, Vizcaya, España
| | - C Gómez-Fernández
- Servicio de Dermatología, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, España
| | - S Hernández-Ostiz
- Servicio de Dermatología, Hospital de Calahorra, Calahorra, La Rioja, España
| | - R Izu Belloso
- Servicio de Dermatología, Hospital Universitario Basurto, Bilbao, Vizcaya, España
| | - A López-Ávila
- Servicio de Dermatología, Hospital General Universitario Santa María del Rosell, Cartagena, España
| | - P Manchado López
- Servicio de Dermatología, Hospital Clínico Universitario de Valladolid, Valladolid, España
| | - A Martín-Santiago
- Servicio de Dermatología, Hospital Universitari Son Espases, Palma de Mallorca, Baleares, España
| | | | - A Mateu-Puchades
- Servicio de Dermatología, Hospital Universitario Doctor Peset, Valencia, España
| | | | - J Notario Rosa
- Servicio de Dermatología, Hospital Universitario de Bellvitge, L' Hospitalet de Llobregat, Barcelona, España
| | - L Palacio Aller
- Servicio de Dermatología, Hospital de Cabueñes, Gijón, Asturias, España
| | - C Pérez-Hortet
- Servicio de Dermatología, Hospital Universitario de Toledo, Toledo, España
| | - L Quintana-Castanedo
- Servicio de Dermatología, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, España
| | - R Rivera
- Servicio de Dermatología, Hospital Universitario 12 de Octubre, Madrid, España
| | - V Rocamora Duran
- Servicio de Dermatología, Hospital de Manacor, Manacor, Baleares, España
| | - I M Rodríguez-Nevado
- Servicio de Dermatología, Complejo Hospitalario Universitario de Badajoz, Badajoz, España
| | - R Ruiz-Villaverde
- Servicio de Dermatología, Hospital Universitario San Cecilio, Granada, España
| | - J Suárez
- Servicio de Dermatología, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, España
| | - L Trasobares-Marugán
- Servicio de Dermatología, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, España
| | - C Vizán-de Uña
- Servicio de Dermatología, Hospital Universitario de Cáceres, Cáceres, España
| | - I Yanguas
- Servicio de Dermatología, Hospital Universitario de Navarra, Pamplona, España
| | - A Zulaica-Garate
- Servicio de Dermatología, Hospital do Meixoeiro, Vigo, Pontevedra, España
| | - I García-Doval
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, España
| | - M Á Descalzo
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, España
| | - M Grau-Pérez
- Unidad de Investigación, Fundación Piel Sana AEDV, Madrid, España; Servicio de Dermatología, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, España.
| | - J M Carrascosa-Carrillo
- Servicio de Dermatología, Hospital Universitario Germans Trias i Pujol, Badalona, Barcelona, España
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Martínez-López MV, McLaughlin L, Molina-Pérez A, Pabisiak K, Primc N, Randhawa G, Rodríguez-Arias D, Suárez J, Wöhlke S, Delgado J. Mapping trust relationships in organ donation and transplantation: a conceptual model. BMC Med Ethics 2023; 24:93. [PMID: 37914997 PMCID: PMC10621073 DOI: 10.1186/s12910-023-00965-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/01/2023] [Indexed: 11/03/2023] Open
Abstract
The organ donation and transplantation (ODT) system heavily relies on the willingness of individuals to donate their organs. While it is widely believed that public trust plays a crucial role in shaping donation rates, the empirical support for this assumption remains limited. In order to bridge this knowledge gap, this article takes a foundational approach by elucidating the concept of trust within the context of ODT. By examining the stakeholders involved, identifying influential factors, and mapping the intricate trust relationships among trustors, trustees, and objects of trust, we aim to provide a comprehensive understanding of trust dynamics in ODT. We employ maps and graphs to illustrate the functioning of these trust relationships, enabling a visual representation of the complex interactions within the ODT system. Through this conceptual groundwork, we pave the way for future empirical research to investigate the link between trust and organ donation rates, informed by a clarified understanding of trust in ODT. This study can also provide valuable insights to inform interventions and policies aimed at enhancing organ donation rates.
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Affiliation(s)
- María Victoria Martínez-López
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain.
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy.
| | - Leah McLaughlin
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- School of Medical and Health Sciences, Bangor University, Bangor, UK
| | - Alberto Molina-Pérez
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy.
- Instituto de Estudios Sociales Avanzados (IESA), CSIC, Córdoba, Spain.
| | - Krzysztof Pabisiak
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Dept Nephrology Transplantation and Internal Medicine, Pomeranian Medical University, Szczecin, Poland
| | - Nadia Primc
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Institute of History and Ethics of Medicine, Medical Department, Heidelberg University, Heidelberg, Germany
| | - Gurch Randhawa
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Institute for Health Research, University of Bedfordshire, Bedfordshire, UK
| | - David Rodríguez-Arias
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
| | - Jorge Suárez
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
| | - Sabine Wöhlke
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
- Department Health Sciences, Faculty Life Science, Hamburg University of Applied Sciences, Hamburg, Germany
| | - Janet Delgado
- Department of Philosophy I, FiloLab-UGR, University of Granada, Granada, Spain
- Ethical Legal and Psychosocial Aspects of Organ Transplantation (ELPAT), European Society for Organ Transplantation (ESOT), Padua, Italy
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Barrios V, Cinza-Sanjurjo S, Gavín O, Egocheaga I, Burgos-Pol R, Soto J, Polanco C, Suárez J, Casado MÁ. Carga y coste del mal control de la anticoagulación con antagonistas de la vitamina K en pacientes con fibrilación auricular no valvular en España. Rev Esp Cardiol 2021. [DOI: 10.1016/j.recesp.2020.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Suárez J, Daboin V, González G, Briceño S. Chitosan-polyvinylpyrrolidone Co xFe 3-xO 4 (0.25 ≤ x ≤ 1) nanoparticles for hyperthermia applications. Int J Biol Macromol 2020; 164:3403-3410. [PMID: 32858107 DOI: 10.1016/j.ijbiomac.2020.08.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/23/2020] [Accepted: 08/05/2020] [Indexed: 02/07/2023]
Abstract
Blends of chitosan (CS) and polyvinylpyrrolidone (PVP) with cobalt ferrite nanoparticles (CoFe2O4) have the potential for use in several biomedical applications as drug delivery systems and for hyperthermia applications. Herein, we present a detailed study of the effect of chitosan and PVP on the structural, magnetic and specific absorption rate (SAR) properties of CoxFe3-xO4 (x = 0.25, 0.50, 0.75 and 1.00) as an effective heat nanomediator for hyperthermia. Structural characterization was carried out using X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Magnetic properties as a function of the Co2+ content were studied using a vibrating sample magnetometer (VSM) at room temperature. Hyperthermia investigations were performed at 454 ± 20 kHz with a magnetic field amplitude of 5.5 mT. CS-PVP coated nanoparticles at x = 1.00 show a maximum SAR of 386 W/g, while bare nanoparticles show a SAR of 270 W/g. The advantage of the designed nanoparticles coated system lies in the fact that the versatile blending of chitosan and PVP enhance the SAR properties for hyperthermia of cobalt ferrite nanoparticles and provide biocompatibility and stability to the samples.
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Affiliation(s)
- Jorge Suárez
- Instituto Venezolano de Investigaciones Cientifícas (IVIC), Apartado 20632, Caracas 1020-A, Venezuela; Instituto de Física del Litoral-IFIS Litoral (CONICET-UNL), Guemes, 3450-3000, Santa Fe, Argentina
| | - Viviana Daboin
- Instituto Venezolano de Investigaciones Cientifícas (IVIC), Apartado 20632, Caracas 1020-A, Venezuela
| | - Gema González
- Instituto Venezolano de Investigaciones Cientifícas (IVIC), Apartado 20632, Caracas 1020-A, Venezuela; Yachay Tech University, School of Physical Sciences and Nanotechnology, 100119 Urcuquí, Ecuador
| | - Sarah Briceño
- Instituto Venezolano de Investigaciones Cientifícas (IVIC), Apartado 20632, Caracas 1020-A, Venezuela; Yachay Tech University, School of Physical Sciences and Nanotechnology, 100119 Urcuquí, Ecuador.
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Barrios V, Cinza-Sanjurjo S, Gavín O, Egocheaga I, Burgos-Pol R, Soto J, Polanco C, Suárez J, Casado MÁ. Cost and burden of poor anticoagulation control with vitamin K antagonists in patients with nonvalvular atrial fibrillation in Spain. ACTA ACUST UNITED AC 2020; 74:773-780. [PMID: 32980294 DOI: 10.1016/j.rec.2020.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 06/05/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION AND OBJECTIVES The aim of this analysis was to evaluate the burden and cost of complications due to poor anticoagulation control in patients with nonvalvular atrial fibrillation (NVAF) treated with vitamin K antagonists (VKA) in Spain. METHODS An analytical model was used to estimate annual differences in ischemic stroke, major bleeding, deaths, costs, and potential years of life lost between patients with poor anticoagulation control (time in therapeutic range <65%) and adequate control (time in therapeutic range ≥ 65%) with a 1-year time horizon. Information on the target population (patients ≥ 65 years), event rates, and costs were obtained from national sources. Direct costs in euros (2018) were included from the perspective of the national health system (NHS) and direct and indirect costs from the societal perspective. A sensitivity analysis was performed with post-hoc data from the SPORTIF III/V trials. RESULTS We analyzed a hypothetical cohort of 594 855 patients, 48.3% with poor anticoagulation control, with an increase of 2321 ischemic strokes, 2236 major bleeding events and 14 463 deaths, and an annual incremental cost between €29 578 306 from the NHS perspective and €75 737 451 from the societal perspective. The annual impact of mortality was 170 502 potential years of life lost. The results of the sensitivity analysis showed that the annual cost would reach €97 787 873 from the societal perspective. CONCLUSIONS Poor anticoagulation control with AVK has a strong impact on loss of health and on increased spending for the NHS.
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Affiliation(s)
- Vivencio Barrios
- Servicio de Cardiología, Hospital Universitario Ramón y Cajal, Universidad de Alcalá, Madrid, Spain.
| | - Sergio Cinza-Sanjurjo
- Centro de Salud Porto do Son, Área Sanitaria de Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Olga Gavín
- Servicio de Hematología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain
| | | | - Ramón Burgos-Pol
- Pharmacoeconomics & Outcomes Research Iberia (PORIB), Madrid, Spain
| | - Javier Soto
- Farmacoeconomía e Investigación de Resultados, Pfizer S.L.U., Madrid, Spain
| | - Carlos Polanco
- Health Economics and Outcomes Research, Bristol-Myers Squibb, Madrid, Spain
| | - Jorge Suárez
- Health Economics and Outcomes Research, Bristol-Myers Squibb, Madrid, Spain
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8
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Oyagüez I, Suárez C, López-Sendón JL, González-Juanatey JR, de Andrés-Nogales F, Suárez J, Polanco C, Soto J. Cost-Effectiveness Analysis of Apixaban Versus Edoxaban in Patients with Atrial Fibrillation for Stroke Prevention. Pharmacoecon Open 2020; 4:485-497. [PMID: 31673882 PMCID: PMC7426339 DOI: 10.1007/s41669-019-00186-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
OBJECTIVE Our objective was to assess the cost effectiveness of apixaban versus edoxaban in the prevention of stroke and systemic embolism (SE) in patients with atrial fibrillation (AF) in Spain. METHODS We customized a Markov model with ten health states to estimate the lifetime economic and clinical outcomes in 6-week cycles. The efficacy (clinical event rates per 100 patient-years) and safety data were derived from a pairwise indirect treatment comparison. The analysis was conducted from both the national health service (NHS) and societal perspectives, and included pharmaceutical costs (retail price plus value-added tax (VAT) and applicable national deductions) according to daily dosages (apixaban 10 mg (5 mg twice daily (bid)) and edoxaban 60 or 30 mg) and complications and disease-management costs, obtained from national databases. Utilities for quality-adjusted life-year (QALY) calculations reflected EuroQoL 5-Dimension scores in patients with AF. An annual discount rate of 3% was applied for costs (€, year 2019 values) and outcomes. RESULTS In a 1000-patient cohort, apixaban 5 mg bid versus edoxaban 60 mg could avoid five strokes, six major bleedings and 29 clinically relevant non-major bleedings (CRNMBs). Compared with edoxaban 30 mg, apixaban could avoid 21 strokes and two SEs. An increase in bleedings was observed with apixaban (seven haemorrhagic strokes, 48 major bleedings and 17 CRNMBs). Apixaban yielded 0.04 additional QALYs compared with edoxaban 60 mg or 30 mg. Incremental costs/QALY were €9639.33 and €354.22 for apixaban versus edoxaban 60 mg and edoxaban 30 mg, respectively, from the NHS perspective and €7756.62 for apixaban versus edoxaban 60 mg from the societal perspective. Apixaban was dominant versus edoxaban 30 mg from the societal perspective. Sensitivity analyses confirmed the robustness of the model. CONCLUSIONS This study suggests that apixaban 5 mg bid is a cost-effective alternative to edoxaban for stroke prevention in the AF population in Spain.
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Affiliation(s)
- Itziar Oyagüez
- Pharmacoeconomics and Outcomes Research Iberia (PORIB), Paseo Joaquín Rodrigo, 4 letra I., Pozuelo de Alarcón, 28224, Madrid, Spain.
| | - Carmen Suárez
- Internal Medicine Department, Hospital La Princesa, Madrid, Spain
| | | | | | - Fernando de Andrés-Nogales
- Pharmacoeconomics and Outcomes Research Iberia (PORIB), Paseo Joaquín Rodrigo, 4 letra I., Pozuelo de Alarcón, 28224, Madrid, Spain
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9
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Rivera P, Martos-Moreno GÁ, Barrios V, Suárez J, Pavón FJ, Chowen JA, Rodríguez de Fonseca F, Argente J. A novel approach to childhood obesity: circulating chemokines and growth factors as biomarkers of insulin resistance. Pediatr Obes 2019; 14:e12473. [PMID: 30350467 DOI: 10.1111/ijpo.12473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/10/2018] [Accepted: 08/15/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND Insulin resistance (IR) in children with obesity constitutes a risk factor that should be precisely diagnosed to prevent further comorbidities. OBJECTIVE Chemokines were evaluated to identify novel predictors of IR with clinical application. METHODS We analysed the levels of cytokines (tumour necrosis factor [TNF] α and interleukins [ILs] 1β, 4, 6 and 10), chemokines (stromal cell derived factor 1α, monocyte chemoattract protein [MCP] 1, eotaxin and fractalkine) and growth factors (brain-derived neurotrophic factor, pro-fibrotic platelet-derived growth factor [PDGF-BB] and insulin-like growth factor 1) in serum of prepubertal children with obesity (61 girls/59 boys, 50% IR and 50% non-IR) and 32 controls. Factor analysis, correlation, binary logistic regression and receiver operating characteristic analysis of combined biomarkers were used to validate their capability for preventive interventions of IR. RESULTS Changes in MCP1, eotaxin, IL1β and PDGF-BB were observed in IR children with obesity. Bivariate correlation between stromal cell derived factor 1α, MCP1, eotaxin, TNFα, brain-derived neurotrophic factor and/or PDGF-BB explained the high variance (65.9%) defined by three components related to inflammation and growth that contribute towards IR. The combination of leptin, triglyceride/high-density lipoprotein, insulin-like growth factor 1, TNFα, MCP1 and PDGF-BB showed a sensitivity and specificity of 93.2% for the identification of IR. The percentage of correct predictions was 89.6. CONCLUSIONS Combined set of cytokines, adipokines and chemokines constitutes a model that predicts IR, suggesting a potential application in clinical practice as biomarkers to identify children with obesity and hyperinsulinaemia.
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Affiliation(s)
- P Rivera
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma de Madrid, Madrid, Spain
| | - G Á Martos-Moreno
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma de Madrid, Madrid, Spain.,Hospital de la Princesa Research Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain
| | - V Barrios
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma de Madrid, Madrid, Spain.,Hospital de la Princesa Research Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain
| | - J Suárez
- Instituto de Investigación Biomédica de Málaga (IBIMA), UGC Salud Mental, Universidad de Málaga, Hospital Universitario Regional de Málaga, Málaga, Spain
| | - F J Pavón
- Instituto de Investigación Biomédica de Málaga (IBIMA), UGC Salud Mental, Universidad de Málaga, Hospital Universitario Regional de Málaga, Málaga, Spain
| | - J A Chowen
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma de Madrid, Madrid, Spain.,Hospital de la Princesa Research Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain.,IMDEA Food Institute, CEIUAM+CSIC, Madrid, Spain
| | - F Rodríguez de Fonseca
- Instituto de Investigación Biomédica de Málaga (IBIMA), UGC Salud Mental, Universidad de Málaga, Hospital Universitario Regional de Málaga, Málaga, Spain.,Department of Psychobiology, Universidad Complutense de Madrid, Madrid, Spain
| | - J Argente
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma de Madrid, Madrid, Spain.,Hospital de la Princesa Research Institute, Madrid, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain.,IMDEA Food Institute, CEIUAM+CSIC, Madrid, Spain
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10
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Decara J, Rivera P, Arrabal S, Vargas A, Serrano A, Pavón FJ, Dieguez C, Nogueiras R, Rodríguez de Fonseca F, Suárez J. Cooperative role of the glucagon-like peptide-1 receptor and β3-adrenergic-mediated signalling on fat mass reduction through the downregulation of PKA/AKT/AMPK signalling in the adipose tissue and muscle of rats. Acta Physiol (Oxf) 2018; 222:e13008. [PMID: 29193738 DOI: 10.1111/apha.13008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 06/29/2017] [Revised: 11/13/2017] [Accepted: 11/23/2017] [Indexed: 12/19/2022]
Abstract
AIM To explore the cooperation of GLP-1 receptor and β3-adrenergic receptor (β3-AR)-mediated signalling in the control of fat mass/feeding behaviour by studying the effects of a combined therapy composed of the GLP-1R agonist liraglutide and the β3-AR agonist CL316243. METHODS The study included the analysis of key mechanisms regulating lipid/cholesterol metabolism, and thermogenesis in brown (BAT) and epididymal white (eWAT) adipose tissues, abdominal muscle and liver of male rats. RESULTS CL316243 (1 mg kg-1 ) and liraglutide (100 μg kg-1 ) co-administration over 6 days potentiated an overall negative energy balance (reduction in food intake, body weight gain, fat/non-fat mass ratio, liver fat content, and circulating levels of non-essential fatty acids, triglycerides, very low-density lipoprotein-cholesterol and leptin). These effects were accompanied by increased plasma levels of insulin and IL6. We also observed increased gene expression of uncoupling proteins regulating thermogenesis in BAT/eWAT (Ucp1) and muscle (Ucp2/3). Expression of transcription factor and enzymes involved either in de novo lipogenesis (Chrebp, Acaca, Fasn, Scd1, Insig1, Srebp1) or in fatty acid β-oxidation (Cpt1b) was enhanced in eWAT and/or muscle but decreased in BAT. Pparα and Pparγ, essentials in lipid flux/storage, were decreased in BAT/eWAT but increased in the muscle and liver. Cholesterol synthesis regulators (Insig2, Srebp2, Hmgcr) were particularly over-expressed in muscle. These GLP-1R/β3-AR-induced metabolic effects were associated with the downregulation of cAMP-dependent signalling pathways (PKA/AKT/AMPK). CONCLUSION Combined activation of GLP-1 and β3-ARs potentiate changes in peripheral pathways regulating lipid/cholesterol metabolism in a tissue-specific manner that favours a switch in energy availability/expenditure and may be useful for obesity treatment.
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Affiliation(s)
- J. Decara
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - P. Rivera
- Department of Endocrinology; Fundación Investigación Biomédica del Hospital Infantil Universitario Niño Jesús; Madrid Spain
| | - S. Arrabal
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - A. Vargas
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - A. Serrano
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - F. J. Pavón
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - C. Dieguez
- Department of Physiology; School of Medicine-CIMUS; University of Santiago De Compostela-Instituto De Investigación Sanitaria; Santiago De Compostela Spain
- CIBER OBN; Instituto de Salud Carlos III; Madrid Spain
| | - R. Nogueiras
- Department of Physiology; School of Medicine-CIMUS; University of Santiago De Compostela-Instituto De Investigación Sanitaria; Santiago De Compostela Spain
- CIBER OBN; Instituto de Salud Carlos III; Madrid Spain
| | - F. Rodríguez de Fonseca
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
| | - J. Suárez
- Instituto de Investigación Biomédica de Málaga (IBIMA); UGC Salud Mental; Universidad de Málaga, Hospital Universitario Regional de Málaga; Málaga Spain
- Departamento de Biología Celular; Genética y Fisiología; Facultad de Ciencias; IBIMA; Universidad de Málaga; Málaga Spain
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11
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Castillo A, Alvarez A, Cuzon G, Suárez J, Gaxiola G. Glycemic response after glucose oral administration of wild juvenile red grouper Epinephelus morio fed two different diets. Fish Physiol Biochem 2018; 44:219-226. [PMID: 28971287 DOI: 10.1007/s10695-017-0426-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/14/2017] [Indexed: 06/07/2023]
Abstract
Epinephelus morio is a large carnivorous species of the Caribbean Sea under reproduction in captivity and nutritional physiology. A diet with raw cornstarch (RCS) was compared to a basal diet without starch (basal) to measure plasma glucose, liver glycogen, and intermediary metabolism. Glucose level did not change (p > 0.05) whereas liver glycogen was significantly higher in fish fed the RCS diet (137.2 ± 14.5 mg g-1) than in fish fed the basal diet (87.4 ± 14.5 mg g-1). Oral glucose administration (170 mg glucose per 100 g body weight) yielded a slight change; two peaks of plasma glucose were recorded with basal (5.6 mM L-1) 2 h after oral administration and at 12 h (6.4 mM L-1). After 24 h, with 1.7 mM L-1, fish returned to initial stage (2.4 mM L-1). RCS diet produced the highest level (6.3 mM L-1) 2 h after oral administration; lowest level observed at 24 h after oral administration (1.0 mM L-1). A significant effect was detected with the presence or absence of dietary carbohydrates (CBH) on hepatic fructose 1,6-bisphosphatase and pyruvate kinase activity. Grouper used two strategies to maintain glucose homeostasis: CBH present in the diet oriented towards gluconeogenesis, whereas no dietary CBH enhanced glycolytic route to liberate glucose and increase liver glycogen.
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Affiliation(s)
- A Castillo
- Posgrado de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - A Alvarez
- DACBIOL, Universidad Juárez Autónoma de Tabasco, Mexico City, Mexico
| | - G Cuzon
- Unidad Multidisciplinaria de Docencia e Investigación de Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - J Suárez
- Unidad Multidisciplinaria de Docencia e Investigación de Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - G Gaxiola
- Unidad Multidisciplinaria de Docencia e Investigación de Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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12
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Guillen IA, Camacho H, Tuero AD, Bacardí D, Palenzuela DO, Aguilera A, Silva JA, Estrada R, Gell O, Suárez J, Ancizar J, Brown E, Colarte AB, Castro J, Novoa LI. PCR Conditions for 16S Primers for Analysis of Microbes in the Colon of Rats. J Biomol Tech 2016; 27:105-12. [PMID: 27382362 DOI: 10.7171/jbt.16-2703-002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The study of the composition of the intestinal flora is important to the health of the host, playing a key role in maintaining intestinal homeostasis and the evolution of the immune system. For these studies, various universal primers of the 16S rDNA gene are used in microbial taxonomy. Here, we report an evaluation of 5 universal primers to explore the presence of microbial DNA in colon biopsies preserved in RNAlater solution. The DNA extracted was used for the amplification of PCR products containing the variable (V) regions of the microbial 16S rDNA gene. The PCR products were studied by restriction fragment length polymorphism (RFLP) analysis and DNA sequence, whose percent of homology with microbial sequences reported in GenBank was verified using bioinformatics tools. The presence of microbes in the colon of rats was quantified by the quantitative PCR (qPCR) technique. We obtained microbial DNA from rat, useful for PCR analysis with the universal primers for the bacteria 16S rDNA. The sequences of PCR products obtained from a colon biopsy of the animal showed homology with the classes bacilli (Lactobacillus spp) and proteobacteria, normally represented in the colon of rats. The proposed methodology allowed the attainment of DNA of bacteria with the quality and integrity for use in qPCR, sequencing, and PCR-RFLP analysis. The selected universal primers provided knowledge of the abundance of microorganisms and the formation of a preliminary test of bacterial diversity in rat colon biopsies.
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Affiliation(s)
- I A Guillen
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - H Camacho
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - A D Tuero
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - D Bacardí
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - D O Palenzuela
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - A Aguilera
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - J A Silva
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - R Estrada
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - O Gell
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - J Suárez
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - J Ancizar
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - E Brown
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - A B Colarte
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - J Castro
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - L I Novoa
- Pharmacogenomics Groups, Systems Biology Division, Center for Genetic Engineering and Biotechnology, Havana, Cuba
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Barbosa D, Bernal LV, Zapata O, Agudelo-Suárez AA, Angel L, Estrada F, Suárez J. Influence of Facial and Occlusal Characteristics on Gummy Smile in Children: A Case-Control Study. Pesqui bras odontopediatria clín integr 2016. [DOI: 10.4034/pboci.2016.161.03] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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14
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Jácome A, Molina J, Novoa R, Suárez J, Ferreiro S. Simultaneous carbon and nitrogen removal from municipal wastewater in full-scale unaerated/aerated submerged filters. Water Sci Technol 2014; 69:217-221. [PMID: 24434990 DOI: 10.2166/wst.2013.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Characterization and evaluation of a biological submerged filter was carried out on a full-scale pilot plant performing removal of biochemical oxygen demand (BOD) and total nitrogen (TN) from pre-treated urban wastewater. The average influent values of BOD5, chemical oxygen demand (COD) and TN were 370, 1,015 and 60 mg/L, respectively. The pilot plant produced good discharge quality during steady-state operation. Average effluent BOD5, COD and TN values were 11, 58 and 15 mg/L, respectively. The reactor had been operating beyond its organic design capacity (200 population equivalent (PE)). At 480 PE the removal achieved for BOD, COD and TN were 98, 97 and 78%, respectively. This technology can absorb pollutant overloads while maintaining stable performance. Denitrification was performed by using sewage itself as carbon source. It was used as an intermittent aeration cycle in the unaerated cell to improve the denitrification process. The predenitrification with submerged unaerated filter has proved to be an efficient process for advanced removal of TN.
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Affiliation(s)
- A Jácome
- University of Coruña, Group of Water and Environmental Engineering, 15071 Coruña, Spain E-mail:
| | - J Molina
- University of Coruña, Group of Water and Environmental Engineering, 15071 Coruña, Spain E-mail:
| | - R Novoa
- University of Coruña, Group of Water and Environmental Engineering, 15071 Coruña, Spain E-mail:
| | - J Suárez
- University of Coruña, Group of Water and Environmental Engineering, 15071 Coruña, Spain E-mail:
| | - S Ferreiro
- INNDES Ltd, Paseo Ronda 1, 2° izq,. 15011 Coruña, Spain
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15
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Arias MS, Cazapal-Monteiro CF, Suárez J, Miguélez S, Francisco I, Arroyo FL, Suárez JL, Paz-Silva A, Sánchez-Andrade R, Mendoza de Gives P. Mixed production of filamentous fungal spores for preventing soil-transmitted helminth zoonoses: a preliminary analysis. Biomed Res Int 2013; 2013:567876. [PMID: 23710451 PMCID: PMC3654621 DOI: 10.1155/2013/567876] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Accepted: 03/22/2013] [Indexed: 11/23/2022]
Abstract
Helminth zoonoses are parasitic infections shared by humans and animals, being the soil-transmitted helminths (STHs) mainly caused by roundworms (ascarids) and hookworms. This study was aimed to assess the individual and/or mixed production of two helminth-antagonistic fungi, one ovicide (Mucor circinelloides) and other predator (Duddingtonia flagrans). Fungi were grown both in Petri plates and in a submerged culture (composed by water, NaCl, Na2HPO4 · 12 H2O, and wheat (Triticum aestivum)). A Fasciola hepatica recombinant protein (FhrAPS) was incorporated to the cultures to improve fungal production. All the cultured plates showed fungal growth, without difference in the development of the fungi when grown alone or mixed. High counts of Mucor spores were produced in liquid media cultures, and no significant differences were achieved regarding single or mixed cultures, or the incorporation of the FhrAPS. A significantly higher production of Duddingtonia spores after the incorporation of the FhrAPS was observed. When analyzing the parasiticide efficacy of the fungal mixture, viability of T. canis eggs reduced to 51%, and the numbers of third stage cyathostomin larvae reduced to 4%. It is concluded, the capability of a fungal mixture containing an ovicide (Mucor) and a predator species (Duddingtonia) for growing together in a submerged medium containing the FhrAPS offers a very interesting tool for preventing STHs.
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Affiliation(s)
- M. S. Arias
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - C. F. Cazapal-Monteiro
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - J. Suárez
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - S. Miguélez
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - I. Francisco
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - F. L. Arroyo
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - J. L. Suárez
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - A. Paz-Silva
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - R. Sánchez-Andrade
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
| | - P. Mendoza de Gives
- Equine Diseases Study Group (COPAR, GI-2120), Animal Pathology Department, Veterinary Faculty, Santiago de Compostela University, 27002 Lugo, Spain
- Área de Helmintología, Centro Nacional de Investigación Disciplinaria en Parasitología Veterinaria, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Paseo Cuaunahuac 8534, 62550 Jiutepec, MOR, Mexico
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16
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Arrazubi V, Suárez J, Guerrero D, Gómez M, Viúdez A, Arias F, Balén E, Vera R. Prognostic significance of thymidylate synthase polymorphisms in rectal cancer patients treated with neoadjuvant chemoradiotherapy. Colorectal Dis 2013; 15:428-35. [PMID: 22958523 DOI: 10.1111/codi.12009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AIM There is a lack of prognostic factors of preoperative chemoradiation for locally advanced rectal cancer. Thymidylate synthase (TS) is the most important target of 5-fluorouracil; three main genetic polymorphisms of TS have been described. We analysed the prognostic value of these in patients with locally advanced rectal cancer treated with fluoropyrimidine-based chemoradiation. METHOD Ninety-nine patients treated between November 2001 and March 2009 were included. All were treated by radiotherapy (5040 cGy) and concomitant fluoropyrimidine-based chemotherapy. Three polymorphisms were analysed: (i) a double (2R) or triple (3R) repeat of a 28 base pair (bp) tandem sequence upstream of the ATG codon initiation site in the 5'-terminal regulatory region, (ii) a functional G > C single nucleotide polymorphism present in the second repeat of the 3R alleles and (iii) a 6 bp deletion at nucleotide 1494 in the 3'-untranslated region. DNA was extracted from paraffin-embedded core biopsies taken from the tumour and the genotype was analysed using polymerase chain reaction restriction fragment length polymorphism. RESULTS The 6 bp polymorphism was significantly associated with disease-free survival (+ 6 bp/+ 6 bp vs-6 bp/-6 bp, P = 0.032 logistic regression). No differences were found in disease-free survival according to the other polymorphisms studied. No relationship was observed between the different TS genotypes and pathological regression. CONCLUSION The study suggests that the TS 6 bp polymorphism may be a predictor of disease-free survival in patients with locally advanced rectal cancer treated with fluoropyrimidine-based chemoradiation.
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Affiliation(s)
- V Arrazubi
- Department of Medical Oncology, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain.
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Arrazubi V, Suárez J, Novas P, Pérez-Hoyos MT, Vera R, Martínez Del Prado P. Chemoradiation of rectal cancer. MINERVA CHIR 2013; 68:11-26. [PMID: 23584263] [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: 06/02/2023]
Abstract
The treatment of locally advanced rectal cancer is a challenge. Surgery, chemotherapy and radiotherapy comprise the multimodal therapy that is administered in most cases. Therefore, a multidisciplinary approach is required. Because this cancer has a high rate of local recurrence, efforts have been made to improve clinical outcomes while minimizing toxicity and maintaining quality of life. Thus, total mesorectal excision technique was developed as the standard surgery, and chemotherapy and radiotherapy have been established as neoadjuvant treatment. Both approaches reduce locoregional relapse. Two neoadjuvant treatments have emerged as standards of care: short-course radiotherapy and long-course chemoradiotherapy with fluoropyrimidines; however, long-course chemoradiotherapy might be more appropriate for low-lying neoplasias, bulky tumours or tumours with near-circumferential margins. If neoadjuvant treatment is not administered and locally advanced stage is demonstrated in surgical specimens, adjuvant chemoradiotherapy is recommended. The addition of chemotherapy to the treatment regimen confers a significant benefit. Adjuvant chemotherapy is widely accepted despite scarce evidence of its benefit. The optimal time for surgery after neoadjuvant therapy, the treatment of low-risk T3N0 neoplasms, the convenience of avoiding radiotherapy in some cases and tailoring treatment to pathological response have been recurrent subjects of debate that warrant more extensive research. Adding new drugs, changing the treatment sequence and selecting the treatment based on prognostic or predictive factors other than stage remain experimental.
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Affiliation(s)
- V Arrazubi
- Hospital Universitario de Basurto, Bilbao, Spain.
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Hevia M, Abascal-Junquera JM, Sacristán R, Suárez J, Lobo B, Méndez S, Pellejero P, Abascal-García R. [Haemostasis control during laparoscopic partial nephrectomy without parenchymal renorrhaphy: the VIVOSTAT(®) experience]. Actas Urol Esp 2013; 37:47-53. [PMID: 22819491 DOI: 10.1016/j.acuro.2012.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Accepted: 03/07/2012] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To present our experience using an autologous fibrin sealant prepared with the Vivostat system(®) to control haemostasis without any renal parenchymal reconstruction. MATERIAL AND METHODS We performed 45 laparoscopic partial nephrectomies using this haemostatic agent. The surgical steps were: colon mobilization, identification of ureter, renal vessels and renal tumor, renal artery control with Rummel tourniquet, tumor excision with harmonic scalpel, application of fibrin glue to the resection bed twice (before and after kidney reperfusion). Patients were evaluated for acute or delayed bleeding. RESULTS Mean age was 63.9 years (33-80); mean tumor size was 2.5cm (1.5-4); mean operative time was 136.1min (90-180). Mean warm ischemia time was 19.2min (10-30). Mean blood loss was 97ml (50-300). Individual haemostatic stitches were performed before application of the sealant if acute bleeding was observed (14 cases). We did not achieve any case of postoperative bleeding from resection bed or renal failure. 1 patient required transfusion due to an abdominal wall haematoma. 65% were clear cell carcinoma, 10% were papillary carcinoma, 20% were oncocitoma. Free margin rate was 100%. Mean hospital stay was 4 days (2-6). Mean follow-up was 14 months (5-45). CONCLUSIONS Excluding renorrhaphy during laparoscopic partial nephrectomy is feasible and safe. Our initial experience with the vivostat system in laparoscopic partial nephrectomy has been encouraging, but longer follow-up is needed to determine the real benefit of this surgical technique in laparoscopic partial nephrectomy.
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Affiliation(s)
- M Hevia
- Servicio de Urología, Hospital Universitario Central de Asturias, Oviedo, España
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Torres-Narváez JC, Mondragón LDV, Varela López E, Pérez-Torres I, Díaz Juárez JA, Suárez J, Hernández GP. Role of the transient receptor potential vanilloid type 1 receptor and stretch-activated ion channels in nitric oxide release from endothelial cells of the aorta and heart in rats. Exp Clin Cardiol 2012; 17:89-94. [PMID: 23620694 PMCID: PMC3628419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Shear stress stimulates nitric oxide (NO) release in endothelial cells. Stretch-activated ion channels (SACs) and the transient receptor potential vanilloid type 1 (TRPV1) receptor respond to mechanical stimulus and are permeable to Na(+), Ca(2+) and K(+). The influence of SACs and the TRPV1 receptor on NO release on the heart and on the vascular reactivity of the thoracic aorta (TA) was studied. Experiments were performed in isolated perfused heart, cultured endothelial cells and TA rings from Wistar rats. Capsaicin (10 μM, 30 μM) was used as a NO release stimulator, capsazepine (6 μM, 10 μM) was used as a capsaicin antagonist and gadolinium (3 μM, 5 μM) was used as an inhibitor of SACs. NO was measured by the Kelm and Tenorio methods. Left ventricular pressure was recorded and coronary vascular resistance was calculated. Capsaicin increased NO release in the heart by 58% (395±8 pmol/mL to 627±23 pmol/mL). Capsazepine and gadolinium inhibited NO release by 74% and 82%, respectively. This tendency was similar in all experimental models. Capsaicin attenuated the effects of norepinephrine (10 M to 7 M) on TA and had no effect in the presence of N (ω)-nitro-L-arginine methyl ester. Therefore, the authors conclude that SACs and the TRPV1 receptor are both present in the coronary endothelium and that both participate in Ca(2+)-dependent NO release.
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Affiliation(s)
| | | | | | - Israel Pérez-Torres
- Departamento de Patología, Instituto Nacional de Cardiología “Ignacio Chávez”, México D F, México
| | | | - Jorge Suárez
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
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Romero-Zerbo SY, Garcia-Gutierrez MS, Suárez J, Rivera P, Ruz-Maldonado I, Vida M, Rodriguez de Fonseca F, Manzanares J, Bermúdez-Silva FJ. Overexpression of cannabinoid CB2 receptor in the brain induces hyperglycaemia and a lean phenotype in adult mice. J Neuroendocrinol 2012; 24:1106-19. [PMID: 22487302 DOI: 10.1111/j.1365-2826.2012.02325.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It is well known that the endocannabinoid system, through cannabinoid CB1 receptor activation, has an important role in the main aspects of energy balance (i.e. food intake, energy expenditure and glucose and fat metabolism), orchestrating all the machinery involved in body weight control and energy homeostasis. A number of studies have revealed a crucial role of brain CB1 receptors in these processes. However, functional cannabinoid CB2 receptors have also been described in the brain, with no studies addressing their putative role in body weight control and glucose homeostasis. We have tested this hypothesis by analysing fasting-induced feeding, body weight, some hypothalamic neuropeptides, glucose tolerance and plasma hormones in an animal model specifically overexpressing CB2 receptors in the central nervous system. We found that specific overexpression of CB2 receptors in the brain promoted higher basal glucose levels, decreased fasting-induced feeding and, eventually, led to a lean phenotype and glucose intolerance. These findings could not be attributed to decreased locomotor activity, increased anxiety or depressive-like behaviours. The expression of relevant neuropeptides such as pro-opiomelanocortin and galanin in the arcuate nucleus of the hypothalamus was altered but not those of the CB1 receptor. Indeed, no changes in CB1 expression were found in the liver, skeletal muscle and adipose tissue. However, cannabinoid CB1 and CB2 receptor expression in the endocrine pancreas and glucagon plasma levels were decreased. No changes in plasma adiponectin, leptin, insulin and somatostatin were found. Taken together, these results suggest a role for central cannabinoid CB2 receptors in body weight control and glucose homeostasis.
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Affiliation(s)
- S Y Romero-Zerbo
- Laboratorio de Medicina Regenerativa, Instituto de Investigación Biomédica de Málaga (Ibima), Hospital Carlos Haya, Málaga, Spain
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Crespillo A, Alonso M, Vida M, Pavón FJ, Serrano A, Rivera P, Romero-Zerbo Y, Fernández-Llebrez P, Martínez A, Pérez-Valero V, Bermúdez-Silva FJ, Suárez J, de Fonseca FR. Reduction of body weight, liver steatosis and expression of stearoyl-CoA desaturase 1 by the isoflavone daidzein in diet-induced obesity. Br J Pharmacol 2012; 164:1899-915. [PMID: 21557739 DOI: 10.1111/j.1476-5381.2011.01477.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND PURPOSE The lack of safe and effective treatments for obesity has increased interest in natural products that may serve as alternative therapies. From this perspective, we have analysed the effects of daidzein, one of the main soy isoflavones, on diet-induced obesity in rats. EXPERIMENTAL APPROACH Rats made obese after exposure to a very (60%) high fat-content diet were treated with daidzein (50 mg·kg(-1)) for 14 days. The dose was selected on the basis of the acute effects of this isoflavone on a feeding test. After 14 days, animals were killed and plasma, white and brown adipose tissue, muscle and liver studied for the levels and expression of metabolites, proteins and genes relevant to lipid metabolism. KEY RESULTS A single treatment (acute) with daidzein dose-dependently reduced food intake. Chronic treatment (daily for 14 days) reduced weight gain and fat content in liver, accompanied by high leptin and low adiponectin levels in plasma. While skeletal muscle was weakly affected by treatment, both adipose tissue and liver displayed marked changes after treatment with daidzein, affecting transcription factors and lipogenic enzymes, particularly stearoyl coenzyme A desaturase 1, a pivotal enzyme in obesity. Expression of uncoupling protein 1, an important enzyme for thermogenesis, was increased in brown adipose tissue after daidzein treatment. CONCLUSIONS AND IMPLICATIONS These results support the use of isoflavones in diet-induced obesity, especially when hepatic steatosis is present and open a new field of use for these natural products.
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Affiliation(s)
- A Crespillo
- Laboratorio de Medicina Regenerativa, Hospital Carlos Haya, Fundación IMABIS, Pabellón de Gobierno, Málaga, Spain
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22
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Suárez J, Ortíz O, Puente N, Bermúdez-Silva FJ, Blanco E, Fernández-Llebrez P, Grandes P, de Fonseca FR, Moratalla R. Distribution of diacylglycerol lipase alpha, an endocannabinoid synthesizing enzyme, in the rat forebrain. Neuroscience 2011; 192:112-31. [PMID: 21756982 DOI: 10.1016/j.neuroscience.2011.06.062] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Revised: 06/18/2011] [Accepted: 06/20/2011] [Indexed: 01/15/2023]
Abstract
1,2-diacylglycerol lipase alpha (DAGLα) is responsible for the biosynthesis and release of 2-arachidonoyl-glycerol (2-AG), the most abundant endocannabinoid in the brain. Although its expression has been detected in discrete regions, we showed here an integrated description of the distribution of DAGLα mRNA and protein in the rat forebrain using in situ hybridization histochemistry and immunohistochemistry. As novelty, we described the distribution of DAGLα protein expression in the olfactory system, the rostral migratory stream, neocortex, septum, thalamus, and hypothalamus. Similar DAGLα immunostaining pattern was also found in the brain of wild-type, but not of DAGLα knockout mice. Immunohistochemical data were correlated by the identification of DAGLα mRNA expression, for instance, in the somata of specific cells in olfactory structures, rostral migratory stream and neocortex, cells in some septal-basal-amygdaloid areas and the medial habenula, and magnocellular cells of the paraventricular hypothalamic nucleus. This widespread neuronal distribution of DAGLα is consistent with multiple roles for endocannabinoids in synaptic plasticity, including presynaptic inhibition of neurotransmitter release. We discuss our comparative analysis of the forebrain expression patterns of DAGLα and other components of the endocannabinoid signaling system, including the CB(1) receptor, monoacylglyceride lipase (MAGL), and fatty acid amide hydrolase (FAAH), providing some insight into the potential physiological and behavioral roles of this system.
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Affiliation(s)
- J Suárez
- Laboratorio de Medicina Regenerativa, Fundación IMABIS, Hospital Carlos Haya, Avenida Carlos Haya 82, 29010 Málaga, Spain.
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de-Misa RF, García M, Dorta S, Febles C, Hernández-Machín B, Serrano S, Pujol RM, Suárez J. Solitary oral ulceration as the first appearance of lymphomatoid papulosis: a diagnostic challenge. Clin Exp Dermatol 2010; 35:165-8. [DOI: 10.1111/j.1365-2230.2009.03251.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Adán-Merino L, Gómez-Senent S, Froilán-Torres C, Suárez J, Martín- Arranz E, Larrauri J, Mora-Sanz P, Segura-Cabral JM, Aldeguer-Martinez M. [Gastric adenocarcinoma in young adults; comparative study with older patients]. Rev Gastroenterol Mex 2010; 75:253-260. [PMID: 20959173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Gastric adenocarcinoma (GA) has been considered a disease of elderly age and has been rarely reported in patients younger than 35 years of age. The aim of thisΩ demographic, clinicopathological and prognosis of gastric cancer in young patients and to compare their features with the behavior in elder adults. METHODS Between 1993 and 2008, 1536 patients with GA were enrolled in a retrospective database. Clinical and pathologic features of thirty patients aged 35 years or less (young group) were compared with those of 458 aged 75 years or more (elder group). RESULTS Mean patient age was 31 and 80-years old in the young and elder groups, respectively, with a predominance of females in the last group (61%). Lauren diffuse type carcinoma was more frequent in people younger than 35 years (70%) than in older patients (17.4%). Main symptoms were dyspepsia (40%) and hemorrhage (20%). The most common T stage in young and elder patients was T3 (52.9% and 56.7% respectively). Surgical resection was performed in 68% of cases and the rest received only systemic chemotherapy. CONCLUSION Gastric adenocarcinoma is rare in young patients and most cases presented at advanced clinical stage similar to elderly patients, so the prognosis in both age groups is poor. For this reason is important to be aware of alarm symptoms and risk factors in order to perform an early endoscopic diagnosis and a treatment with curative intent.
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Affiliation(s)
- L Adán-Merino
- Departamento de Aparato Digestivo, Hospital Infanta Leonor, Madrid, España.
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Cea L, Garrido M, Puertas J, Jácome A, Del Río H, Suárez J. Overland flow computations in urban and industrial catchments from direct precipitation data using a two-dimensional shallow water model. Water Sci Technol 2010; 62:1998-2008. [PMID: 21045324 DOI: 10.2166/wst.2010.746] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper presents the experimental validation and the application to a real industrial catchment of a two-dimensional depth-averaged shallow water model used for the computation of rainfall-runoff transformation from direct precipitation data. Instead of using the common approach in flood inundation modelling, which consists in computing the water depth and velocity fields given the water discharge, in this study the rainfall intensity is imposed directly in the model, the surface runoff being generated automatically. The model considers infiltration losses simultaneously with flow simulation. Gullies are also included in the model, although the coupling between the surface runoff and the sewer network is not considered. Experimental validation of the model is presented in several simplified laboratory configurations of urban catchments, in which the surface runoff has been measured for different hyetographs. The application to a real industrial catchment includes a sewer network flow component, which is solved with the SWMM model. The numerical predictions of the discharge hydrograph generated by a 12 hours storm event are compared with field measurements, providing encouraging results.
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Affiliation(s)
- L Cea
- Environmental and Water Engineering Group, University of A Coruña, ETS Ingenieros de Caminos Canales y Puertos, Campus de Elviña s/n, 15071 A Coruña, Spain.
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26
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Suárez J, Tartaglia MC, Vitali P, Erbetta A, Neuhaus J, Laluz V, Miller BL. Characterizing radiology reports in patients with frontotemporal dementia. Neurology 2009; 73:1073-4. [PMID: 19786700 DOI: 10.1212/wnl.0b013e3181b9c8a6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- J Suárez
- University of Puerto Rico School of Medicine
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Suárez J, Vera R, Balén E, Gómez M, Arias F, Lera JM, Herrera J, Zazpe C. Pathologic response assessed by Mandard grade is a better prognostic factor than down staging for disease-free survival after preoperative radiochemotherapy for advanced rectal cancer. Colorectal Dis 2008; 10:563-8. [PMID: 18070184 DOI: 10.1111/j.1463-1318.2007.01424.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The reduction in tumour stage induced by full course radiotherapy plus chemotherapy is apparent from histological changes. The purpose of this study was to determine the rate of complete pathological response and to evaluate the prognostic value for disease free survival (DFS) and disease specific survival (DSS) of the response. The relation between pretreatment variables (age, gender, stage, tumour height and [carcinoembryogenic antigen (CEA)] and postsurgical variables was compared to the pathological response. METHOD A total of 119 patients with stage II or III rectal cancer underwent surgery 6 weeks after neoadjuvant treatment. Group A included patients with a complete or good pathological response (Mandard grade I-II) and group B patients with a poor response (Mandard grade III-IV-V). The pretreatment endo-rectal ultrasound scan stage was compared with histopathology stage of the resected specimen. DFS and DSS were compared using the log-rank test. RESULTS All 119 patients (mean age 67.9 years, 83 males) underwent resection. The tumour was located in the upper, middle and lower third of the rectum in 11, 51 and 57 patients. 88 patients had a low anterior resection, 28 patients abdomino-perineal resection and three a Hartmann's operation. There was no postoperative death. The circumferential margin (CM) was involved in 10%. A complete pathological response was observed in 17 (14.2%) patients. Thirty-six (30.2%) patients had a group A and 83 a group B response. Group A showed DFS to be significantly higher than group B (log rank: P = 0.007). The DSS rate was not significantly different between the two groups (log rank P = 0.113). Down-staging was not related with DFS. No relation was found between pretreatment variables and response. A good pathological response was related to a lower rate of permanent colostomy but not with CM involvement or the number of lymph nodes. CONCLUSION Tumour regression of grades I or II was a good indicator of DFS in locally advanced rectal cancer, treated by neoadjuvant chemotherapy and radiotherapy. Patients with a high regression grade were associated with a lower incidence of definitive stoma formation. The regression grade was shown to be a better prognostic factor than down-staging.
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Affiliation(s)
- J Suárez
- Department of General Surgery, Hospital de Navarra, Pampalona, Spain.
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Bermúdez-Silva FJ, Suárez J, Baixeras E, Cobo N, Bautista D, Cuesta-Muñoz AL, Fuentes E, Juan-Pico P, Castro MJ, Milman G, Mechoulam R, Nadal A, Rodríguez de Fonseca F. Presence of functional cannabinoid receptors in human endocrine pancreas. Diabetologia 2008; 51:476-87. [PMID: 18092149 DOI: 10.1007/s00125-007-0890-y] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [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] [Received: 07/11/2007] [Accepted: 10/12/2007] [Indexed: 12/31/2022]
Abstract
AIMS/HYPOTHESIS We examined the presence of functional cannabinoid receptors 1 and 2 (CB1, CB2) in isolated human islets, phenotyped the cells producing cannabinoid receptors and analysed the actions of selective cannabinoid receptor agonists on insulin, glucagon and somatostatin secretion in vitro. We also described the localisation on islet cells of: (1) the endocannabinoid-producing enzymes N-acyl-phosphatidyl ethanolamine-hydrolysing phospholipase D and diacylglycerol lipase; and (2) the endocannabinoid-degrading enzymes fatty acid amidohydrolase and monoacyl glycerol lipase. METHODS Real-time PCR, western blotting and immunocytochemistry were used to analyse the presence of endocannabinoid-related proteins and genes. Static secretion experiments were used to examine the effects of activating CB1 or CB2 on insulin, glucagon and somatostatin secretion and to measure changes in 2-arachidonoylglycerol (2-AG) levels within islets. Analyses were performed in isolated human islets and in paraffin-embedded sections of human pancreas. RESULTS Human islets of Langerhans expressed CB1 and CB2 (also known as CNR1 and CNR2) mRNA and CB1 and CB2 proteins, and also the machinery involved in synthesis and degradation of 2-AG (the most abundant endocannabinoid, levels of which were modulated by glucose). Immunofluorescence revealed that CB1 was densely located in glucagon-secreting alpha cells and less so in insulin-secreting beta cells. CB2 was densely present in somatostatin-secreting delta cells, but absent in alpha and beta cells. In vitro experiments revealed that CB1 stimulation enhanced insulin and glucagon secretion, while CB2 agonism lowered glucose-dependent insulin secretion, showing these cannabinoid receptors to be functional. CONCLUSIONS/INTERPRETATION Together, these results suggest a role for endogenous endocannabinoid signalling in regulation of endocrine secretion in the human pancreas.
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Affiliation(s)
- F J Bermúdez-Silva
- Fundación IMABIS, Hospital Carlos Haya, Avenida Carlos Haya 82, 7a Planta, Pabellón A, 29010 Málaga, Spain.
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Pruefer FG, Unger-Saldaña K, Mohamier L, Ramírez M, Suárez J, Ramirez MT, Maldonado V, Meléndez-Zajgla J. Tumor HGF lacks prognostic significance in Mexican breast cancer patients. J Exp Clin Cancer Res 2006; 25:357-64. [PMID: 17167976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Hepatocyte growth factor-scatter factor (HGF-SF) is a pleiotropic protein implicated in tumor formation and metastasis. Since increased levels of HGF-SF were first identified in breast cancer tissue or patient serum, some evidence has suggested that tumor or serum HGF-SF concentration could be one of the most accurate prognostic factors for this disease. However, other recent investigations have not been able to corroborate this finding. The study aims to establish the prognostic significance of HGF-SF in Mexican breast cancer women. Surgical specimens were obtained from 67 incident breast cancer patients at the Mexican National Cancer Institute between 1994 and 1995. Primary breast cancer tissue HGF-SF was measured by quantitative sandwich enzyme immunoassay. Relapse-free and overall survival curves were generated using Kaplan-Meier method. Significance of survival differences was calculated by log-rank test. chi2 was used for the association analysis between prognostic variables. Disease-free survival and overall survival were similar between the high tumor HGF group of patients and the low HGF patients (p = 0.7 and p = 0.36 respectively). No association was found between HGF and other clinicopathological variables (age, menopause status, clinical tumor size, clinical node involvement, metastasis, tumor grade, Estrogen Receptor and Progesterone Receptor). We found no prognostic significance for HGF, nor did we find a clear association between HGF and other known prognostic factors. A firm conclusion cannot be established regarding the role of HGF as a prognostic tool in breast cancer patients.
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Affiliation(s)
- F G Pruefer
- Molecular Biology Laboratory, Basic Research Division, Mexican National Cancer Institute, Mexico City, Mexico
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Castellanos G, Daza G, Sánchez L, Castrillón O, Suárez J. Acoustic speech analysis for hypernasality detection in children. Conf Proc IEEE Eng Med Biol Soc 2006; 2006:5507-5510. [PMID: 17946309 DOI: 10.1109/iembs.2006.260572] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Here, an analysis of different acoustic features and their influence in automatic identification of hypernasality is shown. Effective feature selection method includes preprocessing of the initial feature space based on statistical independence analysis. Simultaneously, the synthesis of a specialized diagnostic feature is proposed based on analyzing the acoustic emission of the hyper nasal speech. As a result, It is obtained the acoustic features can differentiate with enough precision the pathology. However, the proposed feature does not require training samples and less computational power, as well.
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López R, Urquiza M, Patino H, Suárez J, Reyes C, Patarroyo MA, Patarroyo ME. A B-lymphocyte binding peptide from BNRF1 induced antibodies inhibiting EBV-invasion of B-lymphocytes. Biochimie 2005; 87:985-92. [PMID: 15927339 DOI: 10.1016/j.biochi.2005.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2005] [Accepted: 04/19/2005] [Indexed: 11/27/2022]
Abstract
Epstein-Barr virus (EBV) infects human target cells mainly through gp350/220-CD21 and gp42-MHCII interactions; however, it has been shown that these interactions are dispensable for EBV-invasion of susceptible cells, suggesting that other viral proteins are involved in this process. It is probable that tegument BNRF1/p140 protein is involved in EBV-invasion of target cells, since anti-p140 antibodies inhibit EBV-infection of B-lymphocytes and there is evidence that part of the protein is located on virus surface. Sixty-six peptides, covering the entire BNRF1/p140 sequence, were synthesised and tested in lymphoblastoid cell line binding assays. Peptides 11465 and 11521 bound with high affinity to Raji, Ramos and P3HR-1 cells but not to erythrocytes, showing cell-binding behaviour similar to EBV. These two peptides induced antibodies recognising live EBV-infected cells. Interestingly, peptide-11521 (YVLQNAHQIACHFHSNGTDA) or antibodies induced by this peptide inhibited EBV-binding to B-lymphocytes, suggesting that this p140-region could be involved in EBV and B-lymphocyte interaction.
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Affiliation(s)
- Ramsés López
- Fundación Instituto de Inmunología de Colombia (FIDIC), Universidad Nacional de Colombia, Avenida Carrera 50 No. 26-00, Bogotá, Colombia
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Balén E, Suárez J, Ariceta I, Oronoz B, Herrera J, Lera JM. [Laparoscopic surgery in colorectal diseases]. An Sist Sanit Navar 2005; 28 Suppl 3:67-80. [PMID: 16511581] [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: 05/06/2023]
Abstract
The present state of laparoscopic surgery in colorectal diseases is presented, showing results that are superior to open surgery during the hospital stay, infection of the wound and quality of life in the first postoperative month. It is technically possible to carry out all of the techniques of colorectal resection with assisted laparoscopic surgery. The counter-indications depend above all on the state of the patient and his disease: emergency laparoscopy of the colon and rectum barely have a place in the therapeutic arsenal. However, elective surgery contributes a great number of cases, as well as colon cancer, whose laparoscopic approach is only contraindicated if the neighbouring organs are affected or if surgery by laparoscopy is not radical and oncological, due to the case itself or if the surgical team lacks the technique, given that the results for curing cancer are identical to open surgery, with level I scientific evidence. The results of cure and survival from laparoscopic surgery of cancer of the rectum are being studied. A description is given of the details of the surgical technique of right and left colectomies, laparoscopic resections of the rectum and of total colectomy.
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Affiliation(s)
- E Balén
- Servicio de Cirugía General, Hospital de Navarra, Pamplona.
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Ocampo M, Vera R, Rodríguez LE, Curtidor H, Suárez J, García J, Puentes A, López R, Valbuena J, Tovar D, Reyes C, Vega S, Patarroyo ME. Identification of Plasmodium falciparum reticulocyte binding protein RBP-2 homologue a and b (PfRBP-2-Ha and -Hb) sequences that specifically bind to erythrocytes. Parasitol Int 2004; 53:77-88. [PMID: 14984838 DOI: 10.1016/j.parint.2003.11.004] [Citation(s) in RCA: 16] [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] [Received: 07/22/2003] [Accepted: 11/19/2003] [Indexed: 11/26/2022]
Abstract
Plasmodium falciparum reticulocyte binding protein RBP-2 homologues a and b (PfRBP-2-Ha and -Hb) have been described as being high molecular weight proteins, expressed at the P. falciparum merozoite apical extreme, belonging to a family of proteins found in other Plasmodium involved in the search for erythrocyte populations before being invaded by merozoites. 185, 20-mer-long non-overlapping peptides, spanning the entire PfRBP-2-Ha and -Hb sequences, were synthesised, radiolabelled and tested in erythrocyte binding assays. Fifteen PfRBP-2-Ha and -Hb high binding activity peptides (HBAPs) specifically binding to erythrocytes with high affinity were identified. Dissociation constants were between 70 and 300 nM and Hill coefficients were 1 approximately. HBAPs residues critical for binding to erythrocytes were determined. Cross-linking was performed allowing possible receptors for PfRBP-2-Ha and -Hb to be identified on the surface of the erythrocytes. Some of the HABPs showed merozoite invasion inhibition greater than 90% in in vitro assays.
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Affiliation(s)
- Marisol Ocampo
- Fundación Instituto de Inmunología de Colombia and Universidad Nacional de Colombia, Cra 50 # 26-00 Bogotá, Colombia
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Curtidor H, Ocampo M, Tovar D, López R, García J, Valbuena J, Vera R, Suárez J, Rodríguez LE, Puentes A, Guzmán F, Torres E, Patarroyo ME. Specific erythrocyte binding capacity and biological activity of Plasmodium falciparum-derived rhoptry-associated protein 1 peptides. Vaccine 2004; 22:1054-62. [PMID: 15161083 DOI: 10.1016/j.vaccine.2003.07.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2003] [Accepted: 07/27/2003] [Indexed: 10/27/2022]
Abstract
Rhoptry-associated protein 1 (RAP1) is a merozoite antigen within Plasmodium falciparum rhoptries as yet having no specific function described for it. Synthetic peptides spanning the RAP1 sequence were tested in erythrocyte binding assays to identify possible RAP1 functional regions. Five high activity binding peptides (HABPs) were identified; 26201, 26202, 26203 and 26204 spanned residues 461C-K540 within RAP1 Cys region, whilst 26188 (201T-Y220) was located in p67 amino terminal. The results showed that peptide binding was saturable, some HABPs inhibited in vitro merozoite invasion and specifically bound to a 72 kDa protein in red blood cell membrane. HABP possible function in merozoite invasion of erythrocytes is also discussed.
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Affiliation(s)
- Hernando Curtidor
- Fundación Instituto de Inmunología de Colombia and Universidad Nacional de Colombia, Cra 50 No. 26-00, Bogota 571, Colombia
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López R, Valbuena J, Curtidor H, Puentes A, Rodríguez LE, García J, Suárez J, Vera R, Ocampo M, Trujillo M, Ramirez LE, Patarroyo ME. Plasmodium falciparum: red blood cell binding studies using peptides derived from rhoptry-associated protein 2 (RAP2). Biochimie 2004; 86:1-6. [PMID: 14987794 DOI: 10.1016/j.biochi.2003.11.013] [Citation(s) in RCA: 15] [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] [Received: 07/04/2003] [Accepted: 11/28/2003] [Indexed: 11/23/2022]
Abstract
Plasmodium falciparum rhoptry-associated proteins 1 (RAP1) and 2 (RAP2) are antigens presenting themselves as candidates for a subunit malaria vaccine. RAP2 protein, non-overlapping, consecutive peptides were synthesised and tested in red blood cell (RBC) binding assays to identify their receptor-ligand interaction in recognising RAP2 regions involved in the in vitro merozoite invasion process. Four high activity binding peptides (HABPs) were identified in the resulting 20 peptides. Peptides 26220 ((61)NHFSSADELIKYLEKTNINT(80)), 26225 ((161)IKKNPFLRVLNKASTTTHAT(180)) and 26229 ((241)RSVNNVISKNKTLGLRKRSS(260)) were located in the amino terminal and central part of the protein and HABP 26235 ((361)FLAEDFVELFDVTMDCYSRQ(380)) was located at the carboxy terminal. All these HABPs showed saturable binding and presented dissociation constants between 500 and 950 nM; the number of binding sites per RBC ranged from 48,000 to 160,000. High binding peptides' critical amino acids involved in RBC binding were determined by competition binding assays; their amino acids appear in bold in the sequences shown above. SDS-PAGE results showed that peptides 26220, 26225 and 26229 had at least two different sets of 62 and 42 kDa HABP receptors on RBCs and that peptide 26235 had at least two different sets of 77 and 62 kDa. HABPs inhibited in vitro merozoite invasion by between 54% and 94% at 200 microM, suggesting that these RAP2 peptides are involved in the in vitro P. falciparum invasion process.
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Affiliation(s)
- Ramsés López
- Fundación Instituto de Inmunología de Colombia, Bogotá, Colombia
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García JE, Puentes A, López R, Vera R, Suárez J, Rodríguez L, Curtidor H, Ocampo M, Tovar D, Forero M, Bermudez A, Cortés J, Urquiza M, Patarroyo ME. Peptides of the liver stage antigen-1 (LSA-1) of Plasmodium falciparum bind to human hepatocytes. Peptides 2003; 24:647-57. [PMID: 12895649 DOI: 10.1016/s0196-9781(03)00135-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Synthetic peptides from the liver stage antigen-1 (LSA-1) antigen sequence were used in HepG2 cell and erythrocyte binding assays to identify regions that could be involved in parasite invasion. LSA-1 protein peptides 20630 ((21)INGKIIKNSEKDEIIKSNLRY(40)), 20637 ((157)KEKLQGQQSDSEQERRAY(173)), 20638 ((174)KEKLQEQQSDLEQERLAY(190)) and 20639 (191KEKLQEQQSDLEQERRAY(207)) had high binding activity in HepG2 assays. Were located in immunogenic regions; peptide cell binding was saturable. Peptide 20630 bound specifically to 48kDa HepG2 membrane surface protein. LSA-1 peptides 20630 ((21)INGKIIKNSEKDEIIKSNLRY(40)) and 20633 ((81)DKELTMSNVKNVSQTNFKSLY(100)) showed specific erythrocyte binding activity and inhibited merozoite invasion of erythrocytes in vitro. A monkey serum prepared against LSA-1 20630 peptide analog (CGINGKNIKNAEKPMIIKSNLRGC) inhibited merozoite invasion in vitro. The data suggest LSA-1 "High Activity Binding Peptides" could play a possible role in hepatic cell invasion as well as merozoite invasion of erythrocytes.
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Affiliation(s)
- Javier E García
- Fundación Instituto de Inmunologi;a de Colombia, Universidad Nacional de Colombia, Bogotá, Colombia
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Díaz-Horta O, Bello M, Cabrera-Rode E, Suárez J, Más P, García I, Abalos I, Jofra R, Molina G, Díaz-Díaz O, Dimario U. Echovirus 4 and type 1 diabetes mellitus. Autoimmunity 2002; 34:275-81. [PMID: 11905853 DOI: 10.3109/08916930109014696] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AIMS/HYPOTHESIS To determine the association between exposure to enteroviruses and Type 1 diabetes. METHODS We measured neutralizing antibodies to the following enteroviruses: Coxsackievirus CA9, CB1, CB2, CB3, CB4, CB5, CB6, and Echovirus E4, E6, E9, E11 in the sera of (1) Type 1 diabetic patients at diagnosis (n = 33), (2) healthy offspring of parents with Type 1 diabetes without islet cell antibodies (ICA) (n = 43) and (3) normal controls (n = 57). All subjects were less than 20 years old. We performed the neutralization test determining the cytopathogenic effect on Vero cells. HLA DR serotyping was also performed in Group 2. RESULTS Type 1 diabetic patients showed a higher frequency (21.2%, p < 0.01) of neutralizing antibodies to E4 in relation to controls (1.8%), although there were no differences comparing with offspring of Type 1 diabetic patients (20.9%). Healthy offspring carrying Type 1 diabetes HLA DR susceptibility genes were also exposed to E4 (15.0%). High frequencies of neutralizing antibodies to most enteroviruses were found in the control group. CONCLUSION This study shows the association between Type 1 diabetes and the presence of neutralizing antibodies to Echovirus 4, suggesting the possible participation of this virus as an environmental trigger of this autoimmune disease. Interestingly, our population displays high frequencies of exposure to enterovirus (including CB4) although the incidence for Type 1 diabetes is low (2.9 per 100,000 inhabitants).
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Affiliation(s)
- O Díaz-Horta
- Instituto Nacional de Endocrinologia, Havana, Cuba.
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40
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Gómez MDJ, Rousseau G, Nadeau R, Berra R, Flores G, Suárez J. Functional and autoradiographic characterization of dopamine D2-like receptors in the guinea pig heart. Can J Physiol Pharmacol 2002; 80:578-87. [PMID: 12117307 DOI: 10.1139/y02-081] [Citation(s) in RCA: 17] [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: 02/04/2023]
Abstract
Dopamine receptors include the D1- (D1 and D5 subtypes) and D2-like (D2, D3, and D4 subtypes) families. D1-like receptors are positively and D2-like receptors negatively coupled to the adenylyl cyclase. Dopamine D2-like (D4 subtype) receptors have been identified in human and rat hearts. However the presence of D2 and D3 receptor subtypes is unclear. Furthermore, their role in cardiac functions is unknown. By autoradiographic studies of guinea pig hearts, we identified D3 and D4 receptors, using the selective radioligands [3H]-7-OH-DPAT and [3H]emonapride (YM-09151-2 plus raclopride). Western blot analysis confirmed D3 and D4 receptors in the right and left ventricle of the same species. Selective agonists of D3 and D4 receptors (+/-)-7-OH-DPAT and PD 168 077 (10(-9) to 10(-5) M, respectively) induced a significant negative chronotropic and inotropic effect in the isolated guinea pig heart preparation. Negative inotropic effect induced by PD 168 077 was associated with an inhibition in cyclase activity. No changes in cyclase activity were found with (+/-)-7-OH-DPAT. The aim of this study is to support the presence of D3 and D4 receptors in the heart. Although our results suggest that D3 and D4 receptors are functionally active in the heart, we need additional information with an antagonist and an agonist of improved potency and selectivity to understand the respective roles of D3 and D4 receptors in the cardiac functions.
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Rodríguez LE, Urquiza M, Ocampo M, Curtidor H, Suárez J, García J, Vera R, Puentes A, López R, Pinto M, Rivera Z, Patarroyo ME. Plasmodium vivax MSP-1 peptides have high specific binding activity to human reticulocytes. Vaccine 2002; 20:1331-9. [PMID: 11818151 DOI: 10.1016/s0264-410x(01)00472-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Plasmodium vivax merozoites have high preferential ability to interact with and invade reticulocytes, although these cells correspond to only 2% of the red blood cells (RBC) population. P. vivax merozoite surface protein-1 (Pv-MSP-1) is believed to have an important role in attachment and invasion process. Using 88 non-overlapping 20-mer peptides, covering the entire Pv-MSP-1 Belem strain sequence, RBC and reticulocyte binding assays were performed. Fourteen sequences were identified with high specific binding activity to reticulocytes, but only three had high specific binding activity to mature erythrocytes. These peptides showed affinity constant values between 20 and 150nM, indicating a strong interaction between these sequences and reticulocyte receptors. Critical residues in binding to reticulocytes for these peptides were determined by competition binding assays with glycine scanning analogues. All high binding peptides bind to reticulocyte surface proteins having a molecular mass of around 18-20kDa which are not present in mature RBC. Interestingly, some high activity binding peptides (HABPs) are located close to the hypothesised 42 and 19kDa fragment cleavage sites for this protein, suggesting that these sequences have an important role in target cell attachment and invasion process by Pv-MSP-1.HABPs may be clustered in two regions, with region I being located between amino acids 280-719, and region II between amino acids 1060-1599 with higher than 25% identity level. A P. falciparum MSP-1 antigenic domain binds to RBCs and inhibits parasite invasion. Peptides 1721 and 1724 bind with high activity to reticulocytes in homologous Pv-MSP-1, suggesting similar functions for these two sequences.
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Affiliation(s)
- Luis Eduardo Rodríguez
- Fundación Instituto de Inmunología de Colombia, Universidad Nacional de Colombia, Carrera 50, No. 26-00, Bogotá, Colombia.
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Suárez J, Mearin F, Boque R, Zanón V, Armengol JR, Pradell J, Bermejo B, Nadal A. Laparoscopic myotomy vs endoscopic dilation in the treatment of achalasia. Surg Endosc 2002; 16:75-7. [PMID: 11961609 DOI: 10.1007/s00464-001-0032-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/1999] [Accepted: 05/11/2000] [Indexed: 11/26/2022]
Abstract
BACKGROUND The aim of this study was to compare the results obtained in 14 patients with achalasia who underwent laparoscopic Heller's myotomy and Dor's fundoplication with those of 16 patients who had endoscopic dilation. METHODS The diagnosis of achalasia was confirmed by manometry, endoscopy, and barium swallow. Esophageal symptoms were quantified before and after treatment using a clinical scale. Six patients had had endoscopic dilation prior to surgery. RESULTS Before treatment, the patients in the surgical group complained of more severe dysphagia (median, 5; range, 0-5 vs median 4; range, 3-5) and chest pain (median, 3; range, 0-5 vs median, 1.5; range, 0-5), but both groups were comparable with respect to regurgitation, heartburn, and manometric results. Both groups achieved significant clinical improvement. The severity score decreased from 5 (range, 0-5) to 1 (range, 0-3) (p < 0.05) for dysphagia to solids in the laparoscopic group and from 4 (range, 3-5) to 1 (range, 0-5) (p < 0.05) in the endoscopic group. Lower esophageal sphincter (LES) basal pressure decreased significantly in both groups (from 29.3 to 11.8 mmHg in the laparoscopic group and from 28.9 to 16.5 mmHg in the endoscopic group). After treatment, there were no significant clinical differences between the two groups. Two patients in the surgical group were converted to open surgery. CONCLUSION Laparoscopic myotomy is as save and effective as endoscopic dilation in the treatment of achalasia.
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Affiliation(s)
- J Suárez
- Department of General Surgery, Hospital General Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain.
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43
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Díaz-Muñoz M, Hernández-Muñoz R, Suárez J, Vidrio S, Yááñez L, Aguilar-Roblero R, Rosenthal L, Villalobos L, Fernández-Cancino F, Drucker-Colín R, Chagoya De Sanchez V. Correlation between blood adenosine metabolism and sleep in humans. Sleep Res Online 2001; 2:33-41. [PMID: 11382880] [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: 02/20/2023]
Abstract
Blood adenosine metabolism, including metabolites and metabolizing enzymes, was studied during the sleep period in human volunteers. Searching for significant correlations among biochemical parameters found: adenosine with state 1 of slow-wave sleep (SWS); activity of 5'-nucleotidase with state 2 of SWS; inosine and AMP with state 3-4 of SWS; and activity of 5'-nucleotidase and lactate with REM sleep. The correlations were detected in all of the subjects that presented normal hypnograms, but not in those who had fragmented sleep the night of the experiment. The data demonstrate that it is possible to obtain information of complex brain operations such as sleep by measuring biochemical parameters in blood. The results strengthen the notion of a role played by adenosine, its metabolites and metabolizing enzymes, during each of the stages that constitute the sleep process in humans.
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Affiliation(s)
- M Díaz-Muñoz
- Departamentos de Biología Celular and Neurociencias, Instituto de Fisiología Celular and Departamento de Fisiología, Facultad de Medicina Universidad Nacional Autónoma de México, México
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Villalobos V, Suárez J, Estévez J, Novo E, Bonilla E. Effect of chronic manganese treatment on adenosine tissue levels and adenosine A2a receptor binding in diverse regions of mouse brain. Neurochem Res 2001; 26:1157-61. [PMID: 11700959 DOI: 10.1023/a:1012379024571] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In the present study the effects of chronic manganese (Mn) treatment on adenosine A2a receptor binding in mouse brain have been assessed. Male albino mice were divided in two groups: In the Mn-treated group, the animals were injected intraperitoneally (i.p.) with MnCl2 (5 mg/kg/day) five days per week during 9 weeks; in the control group, they were injected likewise with a saline solution. A significant decrease of the Kd without alteration of Bmax in the cerebellum and, an increase of the Kd and Bmax in hippocampus of mice treated with Mn were found. Also, an increase of Kd in frontal cortex was observed. The binding parameters in caudate nucleus, olfactory bulb and hypothalamus were not altered by Mn. A significant decrease in the adenosine concentration in caudate nucleus, olfactory bulb and hypothalamus, without significant changes in hippocampus, frontal cortex and cerebellum was also detected. These findings suggest that chronic administration of Mn could affect adenosine receptor function and turnover, depending on the brain region analyzed.
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Affiliation(s)
- V Villalobos
- Departamento de Biología, Facultad Experimental de Ciencias, Universidad del Zulia, Maracaibo, Venezuela.
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Suárez J, Bautista JM, Almodóvar A, Machordom A. Evolution of the mitochondrial control region in Palaearctic brown trout (Salmo trutta) populations: the biogeographical role of the Iberian Peninsula. Heredity (Edinb) 2001; 87:198-206. [PMID: 11703510 DOI: 10.1046/j.1365-2540.2001.00905.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In order to extend present knowledge of brown trout phylogeography in the Palaearctic, we analysed the complete mitochondrial D-loop sequence (1025-1027 bp) of all mitochondrial haplotypes of Salmo trutta found in the Iberian Peninsula and one North African haplotype. Sequence variation in the mitochondrial control region serves to identify four major haplotype groups within the Iberian Peninsula, i.e. Atlantic, Duero, Mediterranean and Andalusian. Including the Iberian haplotypes, the five main European groups previously established were increased to six: (i) an Atlantic group including two different clusters, South European and North Atlantic; (ii) a group representing an endemism restricted to the Duero basin in the Iberian Peninsula; (iii) an Adriatic-Andalusian group found in two vicariant areas including Adriatic-Ionian populations in the Mediterranean and the Andalusian basins of the southern Iberian Peninsula; (iv) a Mediterranean group with a distribution range that extends from the southwestern basins of the Iberian Peninsula to the Ionian basins of the Greek Peninsula; (v) a Danube group of wide distribution in the Black, Aral and Caspian basins; and (vi) a group comprising the S. t. marmoratus subspecies confined to the Adriatic Sea. The Iberian Peninsula appears to have acted as a physical boundary between haplotypes corresponding to Atlantic- and Mediterranean-draining rivers. Owing to its geographical position, this area has played a major role in present Palaearctic species distribution, as illustrated by its haplotype diversity.
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Affiliation(s)
- J Suárez
- Instituto Madrileño de Investigación Agraria y Alimentaria, El Encín. Apdo. 127, 28800 Madrid, Spain.
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46
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Sánchez-Andrade R, Paz-Silva A, Suárez J, Panadero R, Díez-Baños P, Morrondo P. Use of a sandwich-enzyme-linked immunosorbent assay (SEA) for the diagnosis of natural Fasciola hepatica infection in cattle from Galicia (NW Spain). Vet Parasitol 2000; 93:39-46. [PMID: 11027859 DOI: 10.1016/s0304-4017(00)00326-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An indirect-enzyme immune-linked immunosorbent assay (IEA) was compared to a sandwich-enzyme-linked immunosorbent assay (SEA) to diagnose fasciolosis in naturally infected cattle. By means of a rabbit polyclonal IgG antibody to F. hepatica antigens, captured circulating antigens were detected by an SEA technique. A total of 85.1% of the samples examined was considered positive by using the IEA-test, whereas this percentage was of 37.3% by the SEA test. Using the two enzymatic probes, only the 38.3% resulted positive to both immunoassay probes. Our data indicate that circulating antigen detection assay in combination with results of antibody detection may offer a more reliable diagnostic technique than classic coprologic ones, with results very appropriate for epidemiologic studies carried out on a wide area.
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Affiliation(s)
- R Sánchez-Andrade
- Departamento de Patología Animal, Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071, Lugo, Spain
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de Misa RF, Castro V, Suárez J, Perera A. Pruritic vulvar nodule in a black woman. Diagnosis: Granular cell tumor (Abrikossoff tumor). Arch Dermatol 2000; 136:1165-70. [PMID: 10987879 DOI: 10.1001/archderm.136.9.1165-b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- R F de Misa
- Complejo Hospitalario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
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Abstract
The biogeographical distribution of brown trout mitochondrial DNA haplotypes throughout the Iberian Peninsula was established by polymerase chain reaction-restriction fragment polymorphism analysis. The study of 507 specimens from 58 localities representing eight widely separated Atlantic-slope (north and west Iberian coasts) and six Mediterranean drainage systems served to identify five main groups of mitochondrial haplotypes: (i) haplotypes corresponding to non-native, hatchery-reared brown trout that were widely distributed but also found in wild populations of northern Spain (Cantabrian slope); (ii) a widespread Atlantic haplotype group; (iii) a haplotype restricted to the Duero Basin; (iv) a haplotype shown by southern Iberian populations; and (v) a Mediterranean haplotype. The Iberian distribution of these haplotypes reflects both the current fishery management policy of introducing non-native brown trout, and Messinian palaeobiogeography. Our findings complement and extend previous allozyme studies on Iberian brown trout and improve present knowledge of glacial refugia and postglacial movement of brown trout lineages.
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Affiliation(s)
- A MacHordom
- Instituto Madrileño de Investigación Agraria y Alimentaria, El Encín. Apdo. 127, 28800 Madrid, Spain.
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49
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Abstract
PURPOSE Depth of wall invasion is the main prognostic factor in gastric cancer. We studied the utility of hydrogastric sonography in the evaluation of transmural infiltration by gastric cancer. METHODS Thirty-seven patients with gastric adenocarcinoma were examined before surgery with a 5-MHz probe after the ingestion of 100-400 ml of water (mean, 330 ml). Sonographic results were compared with pathologic classifications obtained after surgery. RESULTS Of the 37 tumors, 15 were found at surgery to be in the antrum, 10 were in the gastric body, 5 were proximal, and 7 were diffuse. After surgery, tumors were classified as follows: 2 (5%) T1, 4 (11%) T2, 15 (41%) T3, and 16 (43%) T4. Hydrogastric sonography correctly classified 30 (81%) of the 37 tumors. Sonography was correct for 2 (100%) of the 2 T1 tumors, 2 (50%) of the 4 T2 tumors, 13 (87%) of the 15 T3 tumors, and 13 (81%) of the 16 T4 tumors. Five sonographic errors were due to understaging and 4 to overstaging. With regard to tumor site, sonographic results were correct for 4 (57%) of the 7 diffuse tumors, 3 (60%) of the 5 proximal tumors, 9 (90%) of the 10 gastric body tumors, and 14 (93%) of the 15 antral tumors. CONCLUSIONS Hydrogastric sonography is useful for preoperative evaluation of transmural infiltration by gastric cancers, particularly tumors in the antrum or gastric body.
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Affiliation(s)
- J M Segura
- Gastroenterology Service, Hospital La Paz, Paseo de La Castellana, 261, 28041 Madrid, Spain
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Torres JC, Pastelín G, Suárez J. [The influence of coronary flow on atrio-ventricular transmission and ventricular contraction in the isolated guinea pig heart]. Arch Inst Cardiol Mex 1999; 69:403-10. [PMID: 10640203] [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: 02/15/2023]
Abstract
UNLABELLED It has been demonstrated that coronary flow, through hemodynamic forces, stimulates ventricular contraction and atrio-ventricular transmission; however, the mechanisms involved in these effects remain unknown. A possibility to explain the transduction mechanism, from a mechanical stimulus into a physiological response, could be the stretch-activated ion channels. Additionally we explored the role of nitric oxide as mediator of these actions. METHODS We used the isolated perfused guinea pig heart according to the method of Langendorff, perfused with Krebs solution. We recorded the ventricular contraction by development of left ventricular pressure and the atrio-ventricular transmission. We studied the effects of the stretch activated ion channel blocker; gadolinium. Synthesis of nitric oxide was inhibited by L-NAME and induced with L-arginine. RESULTS Gadolinium inhibited the stimulating effect of flow on atrio-ventricular transmission and ventricular contraction. Verapamil, a specific blocker of calcium channels, had no effect in the stimulatory effect of flow indicating that this type of calcium channel, do not play significant role in the effects of flow. L-NAME and L-arginine did not have effects on the effects of flow. CONCLUSION The stimulating effect of coronary flow in these parameters is regulated by stretch-activated ionic channels. This effect is independent of nitric oxide.
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Affiliation(s)
- J C Torres
- Escuela Superior de Medicina del I.P.N., México, D.F
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