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Medrano M, Contreras M, Caballero-Velázquez T, Martínez L, Bejarano-García JA, Calderón-Ruiz R, García-Calderón CB, Rosado IV, Pérez-Simón JA. Cannabinoids induce cell death in leukaemic cells through Parthanatos and PARP-related metabolic disruptions. Br J Cancer 2024; 130:1529-1541. [PMID: 38461169 PMCID: PMC11058274 DOI: 10.1038/s41416-024-02618-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 02/01/2024] [Accepted: 02/08/2024] [Indexed: 03/11/2024] Open
Abstract
BACKGROUND Several studies have described a potential anti-tumour effect of cannabinoids (CNB). CNB receptor 2 (CB2) is mostly present in hematopoietic stem cells (HSC). The present study evaluates the anti-leukaemic effect of CNB. METHODS Cell lines and primary cells from acute myeloid leukaemia (AML) patients were used and the effect of the CNB derivative WIN-55 was evaluated in vitro, ex vivo and in vivo. RESULTS We demonstrate a potent antileukemic effect of WIN-55 which is abolished with CB antagonists. WIN-treated mice, xenografted with AML cells, had better survival as compared to vehicle or cytarabine. DNA damage-related genes were affected upon exposure to WIN. Co-incubation with the PARP inhibitor Olaparib prevented WIN-induced cell death, suggesting PARP-mediated apoptosis which was further confirmed with the translocation of AIF to the nucleus observed in WIN-treated cells. Nicotinamide prevented WIN-related apoptosis, indicating NAD+ depletion. Finally, WIN altered glycolytic enzymes levels as well as the activity of G6PDH. These effects are reversed through PARP1 inhibition. CONCLUSIONS WIN-55 exerts an antileukemic effect through Parthanatos, leading to translocation of AIF to the nucleus and depletion of NAD+, which are reversed through PARP1 inhibition. It also induces metabolic disruptions. These effects are not observed in normal HSC.
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Affiliation(s)
- M Medrano
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
| | - M Contreras
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
| | - T Caballero-Velázquez
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
- Department of Hematology, University Hospital Virgen del Rocío, Universidad de Sevilla, Seville, Spain
| | - L Martínez
- Department of Medical Biochemistry, Molecular Biology and Immunology, Universidad de Sevilla, Seville, Spain
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - J A Bejarano-García
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
| | - R Calderón-Ruiz
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
| | - C B García-Calderón
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain
| | - I V Rosado
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
| | - J A Pérez-Simón
- Instituto de Biomedicina de Sevilla (IBIS/CSIC), Universidad de Sevilla, Seville, Spain.
- Department of Hematology, University Hospital Virgen del Rocío, Universidad de Sevilla, Seville, Spain.
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Carrasco R, Lapayese F, de la Peña A, Medrano M, Mota F, Soleto A, Pereira A, Pastor C, Rodríguez C, Rincón E, Cabrera S, Fernández A, Ramos F, Queral V, Letellier L, Guern FL, Piqueras J. Tests on the prototype of the Optical Hinge for the Wide Angle Viewing System to ITER gamma radiation conditions. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Fernández A, Martínez-Fernández J, Medrano M, Cabrera S, Le Guern F, Rodríguez E. Electromagnetic analysis of the Interspace Afocal Module of the Wide Angle Viewing System diagnostic for ITER. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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4
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Pereira A, Medrano M, Leon-Gutierrez E, Pastor C, Mota F, Vila R, Rodriguez C, Carrasco R, Lapayese F, de la Peña A, Soleto A, Rincón E, Cabrera S, Queral V, Fernández A, López-Heredero R, Torquemada C, Rodrigo T, Gómez L, Belenguer T, Vermeeren L, Leysen W, Piqueras J, Le-Guern F, Alén-Cordero C. Radiation effects in optical coatings for ITER diagnostics. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Chico-Sordo L, Polonio AM, Córdova-Oriz I, Medrano M, Herraiz S, Bronet F, García-Velasco JA, Varela E. Telomeres and oocyte maturation rate are not reduced by COVID-19 except in severe cases. Reproduction 2022; 164:259-267. [PMID: 36136831 DOI: 10.1530/rep-22-0243] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/22/2022] [Indexed: 11/08/2022]
Abstract
In brief COVID-19 does not affect the telomeres or fertility outcomes in mild cases. However, in women with severe symptoms, telomeres of granulosa cells are shorter, and the oocyte maturation rate is decreased. Abstract The coronavirus SARS-CoV-2 causes COVID-19 disease and affects primarily the lungs and also other organs, causing accelerated cell aging. One of the main pathways involved in aging is telomere attrition, which ultimately leads to defective tissue regeneration and organ dysfunction. Indeed, short telomeres in aged people aggravate the COVID-19 symptoms, and COVID-19 survivors showed shorter telomeres in blood cells. The SARS-CoV-2 has been detected in testis, but the ovaries, which express the viral entry factors, have not been fully explored. Our objective was to analyze telomeres and reproductive outcomes in women who had COVID-19 and controls. In this prospective cohort study, granulosa cells (GCs) and blood were collected from 65 women. Telomere length (TL) was measured by high-throughput in situ hybridization. Mean TL of GCs and peripheral blood mononuclear cells (PBMCs) was alike in control and mild cases. However, mean TL of GCs was lower in severe cases compared to controls (P = 0.017). Control and COVID groups had similar ovarian reserve and number of total oocytes after puncture. However, the oocyte maturation rate was lower in severe cases (P = 0.018). Interestingly, a positive correlation between the oocyte maturation rate and TL of GCs was found in the control group (P = 0.024). Our findings point to a potential impact of the coronavirus infection on telomeres and reproductive outcomes in severe cases. This might be considered upon possible new SARS-CoV threats, to favor treatments that enhance oocyte maturation in women severely affected by coronavirus undergoing ART.
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Affiliation(s)
- L Chico-Sordo
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain
| | - A M Polonio
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain
| | - I Córdova-Oriz
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain
| | - M Medrano
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain
| | - S Herraiz
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain
| | | | - J A García-Velasco
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain.,IVIRMA Madrid, Madrid, Spain.,Rey Juan Carlos University, Edificio Departamental II, Alcorcón, Madrid, Spain
| | - E Varela
- IVI Foundation, The Health Research Institute La Fe (IIS La Fe) - Edificio Biopolo, Valencia, Spain.,Rey Juan Carlos University, Edificio Departamental II, Alcorcón, Madrid, Spain
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6
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Palitsky R, Kaplan DM, Brodt MA, Anderson MR, Athey A, Coffino JA, Egbert A, Hallowell ES, Han GT, Hartmann MA, Herbitter C, Herrera Legon M, Hughes CD, Jao NC, Kassel MT, Le TAP, Levin-Aspenson HF, López G, Maroney MR, Medrano M, Reznik SJ, Rogers ML, Stevenson BL. Systemic Challenges in Internship Training for Health-Service Psychology: A Call to Action From Trainee Stakeholders. Clin Psychol Sci 2022; 10:819-845. [PMID: 36465892 PMCID: PMC9718483 DOI: 10.1177/21677026211072232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
The challenges observed in health service psychology (HSP) training during COVID-19 revealed systemic and philosophical issues that preexisted the pandemic, but became more visible during the global health crisis. In a position paper written by 23 trainees across different sites and training specializations, the authors use lessons learned from COVID-19 as a touchstone for a call to action in HSP training. Historically, trainee voices have been conspicuously absent from literature about clinical training. We describe longstanding dilemmas in HSP training that were exacerbated by the pandemic and will continue to require resolution after the pandemic has subsided. The authors make recommendations for systems-level changes that would advance equity and sustainability in HSP training. This article advances the conversation about HSP training by including the perspective of trainees as essential stakeholders.
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Affiliation(s)
- R Palitsky
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
| | - D M Kaplan
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
- 12. Brown University, Center for Alcohol and Addiction Studies
| | - M A Brodt
- 2. Oklahoma State University, Counseling and Counseling Psychology Department, College of Education and Human Sciences
| | - M R Anderson
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
| | - A Athey
- 3. Johns Hopkins University School of Public Health
| | - J A Coffino
- 4. Department of Population Health, New York University School of Medicine
| | - A Egbert
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
- 5. The Miriam Hospital, Providence, RI
| | - E S Hallowell
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
| | - G T Han
- 6. Yale Child Study Center, Yale School of Medicine
| | | | - C Herbitter
- 8. VA Boston Healthcare System
- 18. Boston University Medical School
| | | | - C D Hughes
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
| | - N C Jao
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
- 5. The Miriam Hospital, Providence, RI
| | | | - T-A P Le
- 11. Capital OCD and Anxiety Practice
| | - H F Levin-Aspenson
- 1. Warren Alpert Medical School at Brown University, Department of Psychiatry and Human Behavior
| | - G López
- 12. Brown University, Center for Alcohol and Addiction Studies
| | - M R Maroney
- 13. Werklund School of Education, University of Calgary
| | | | - S J Reznik
- 15. Texas Institute for Excellence in Mental Health, University of Texas at Austin
| | - M L Rogers
- 16. Icahn School of Medicine, Mount Sinai Beth Israel
| | - B L Stevenson
- 17. University of Minnesota Department of Psychiatry
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7
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Noguerales C, Álvarez A, Ascasibar E, Carrasco R, Liniers M, Medrano M, Rodríguez-Rodrigo L, Vico A. RADIOPROTECTION SURVEILLANCE OF THE TJ-II OPERATION BY TLD. Radiat Prot Dosimetry 2022; 198:843-852. [PMID: 35780317 DOI: 10.1093/rpd/ncac148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 05/05/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
The TJ-II stellarator presently in operation at the National Laboratory of Fusion is subject to radiological surveillance in compliance with the Spanish Nuclear Regulation. During its pulsed operation hard X-rays are emitted by the runaway electrons, and soft X-rays are generated by bremsstrahlung of thermalized electrons. Inside the experimental hall, the plasma heating systems and some active diagnostics are additional sources of radiation. Outside the experimental hall, some auxiliary systems, such as high-voltage power supplies, must be checked for radiological influence. In order to verify the adequate radiological classification of the different working areas, 15 dosemeters are distributed in radiologically controlled areas close to the machine, as well as in areas of public use in the TJ-II building. The integrated dose equivalent is analyzed to help establish the range of radiological influence of the stellarator. The results of the period 2015-20 are presented and analyzed.
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Affiliation(s)
- C Noguerales
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - A Álvarez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - E Ascasibar
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - R Carrasco
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - M Liniers
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - M Medrano
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - L Rodríguez-Rodrigo
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
| | - A Vico
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Madrid, Spain
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8
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Oriz IC, Toribio M, Khols G, Iglesias C, Chico-Sordo L, Polonio A, Medrano M, Díaz-Gómez M, Molinero-Ballesteros A, Meseguer M, García-Velasco J, Varela E. P-629 A prospective, randomized, placebo-controlled pilot trial investigating telomere length dynamics and ovarian function in patients with diminished ovarian reserve (DOR) after danazol treatment. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
Could the administration of a synthetic steroid -danazol- for 3 months reactivate telomerase activity and lengthen telomeres in patients with DOR?
Summary answer
Danazol treatment resulted in an increase of the mean leukocyte telomeric length (TL) but did not improve fertility results after the nearest ovarian stimulation (OS).
What is known already
A primary molecular cause of aging is telomere attrition, given that the accumulation of critically short telomeres leads organ dysfunction. Telomere shortening can be counteracted by the telomerase enzyme, which is responsible for adding deoxyribonucleotides to the linear ends of chromosomes. In patients with DOR, TL in granulosa cells (GCs) is short and telomerase activity is absent, compromising their proliferative capacity. Previuos studies have shown that estrogens can activate telomerase gene transcription through estrogen-responsive elements located in the promoter of the telomerase gene. Therefore, telomere attrition could be reduced in patients with DOR upon telomerase reactivation.
Study design, size, duration
This blinded, placebo-controlled pilot trial was carried out at IVIRMA Madrid clinic between February 2020 and February 2022. The study included 12 patients with DOR (AMH<2ng/ml) which were randomized to danazol or placebo. Patients had 12 visits for health supervision and in vitro fertilization (IVF) treatment. Both groups received danazol (400mg per day) or placebo for 3 months. As control group, 7 patients with normal ovarian reserve (AMH≥2ng/ml) were included.
Participants/materials, setting, methods
In both groups, blood samples were collected prior (PT) and after the treatment (AT). Luteinized GCs and blood samples were obtained during oocyte retrieval, after OS. Leukocytes were purified in Ficoll gradients and then, evaluated for TL and TRF1 levels by Quantitative Fluorescent in Situ Hybridization followed by image acquisition using high resolution confocal microscope. IVF parameters were assessed according to IVIRMA standard protocols.
Main results and the role of chance
A total of 19 women were recruited: 5 in the placebo group (39.8±2.7 years), 7 in Danazol group (41.0±3.0 years) and 7 in control group (39.5±3.0 years). The Danazol group showed a trend to higher mean TL in leukocytes after the treatment (108.2±37.4 versus 99±13.2 a.u., AT vs PT). Interestingly, the percentage of long telomeres also increased with treatment (15.5±0.0 versus 10.8±8.1 a.u., AT vs PT). In addition, there was a decrease of the percentage of critically short telomeres (15.7±0.0 versus 20.8±9.9 a.u. AT vs PT). In the placebo group, mean leukocyte TL and the percentage of long and short telomeres remained constant. These findings suggest that telomeres lengthen after Danazol treatment. The protein levels of TRF1, a shelterin involved in telomere protection, were similar in both Danazol and placebo groups. Regarding fertility, there were no differences in the number of antral follicles, total and MII oocytes, fertilization rate and blastocyst formation. The control group had, as expected, signficantly higher mean follicle number after OS when compared with Danazol (16.0±1.4 and 0.7±0.9, P < 0.0001) and placebo (16.0±1.4 and 5.0±3.8, p = 0.0127) groups, and higher numbers of total oocytes retrieved (p = 0.006; control and Danazol, and p = 0.007; control and placebo).
Limitations, reasons for caution
Firstly, the number of patients included in the study is limited due to strict inclusion/exclusion criteria. Secondly, because follicle growth can take up to 150 days, danazol effects could be noticeable at later OS and not only in the first OS, which was the only one studied here.
Wider implications of the findings
Since telomeres seem to elongate in blood samples after Danazol treatment in DOR patients, we could hypothesize that this may have a positive impact for general health, including the ovaries. Thus, danazol therapy might help improving IVF outcomes, perhaps at later OS.
Trial registration number
NCT04058678
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Affiliation(s)
| | - M Toribio
- IVI-RMA Madrid, IVI-RMA Madrid , Madrid, Spain
| | - G Khols
- IVI-RMA Madrid, IVI-RMA Madrid , Madrid, Spain
| | - C Iglesias
- IVI-RMA Madrid, IVI-RMA Madrid , Madrid, Spain
| | | | | | - M Medrano
- IVI Foundation, IVI Foundation , Valencia, Spain
| | | | | | - M Meseguer
- IVI-RMA Valencia, IVI-RMA Valencia , Valencia, Spain
| | | | - E Varela
- IIS La Fe, IVI Foundation - URJC Alcorcón , Madrid, Spain
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9
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Medrano M, Soleto A, Pastor C, Rodríguez C, Carrasco R, Lapayese F, de la Peña A, Pereira A, Rincón E, Cabrera S, Ramos F, de la Cal E, Mota F, Queral V, Lopez-Heredero R, Manzanares A, Alén-Cordero C, Letellier L, Vives S, Martin V, Guern FL, Piqueras J, Kocan M. Design overview of ex-vessel components for the Wide Angle Viewing System diagnostic for ITER Equatorial Port 12. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112651] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Amasene M, Besga A, Medrano M, Urquiza M, Rodriguez-Larrad A, Tobalina I, Barroso J, Irazusta J, Labayen I. Nutritional status and physical performance within handgrip and SPPB tests in hospitalized elderly adults. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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García-Cortés I, Cabrera S, Medrano M, Moroño A, Muñoz P, Soleto A, Bugallo I, Nieto A, Altimira R, Bollero A, Camarero J, Cuñado J. RMATE: A device to test radiation-induced effects under controlled magnetic field and temperature. Fusion Engineering and Design 2020. [DOI: 10.1016/j.fusengdes.2019.111431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Gangoiti M, Puertas A, Hamet M, Peruzzo P, Llamas M, Medrano M, Prieto A, Dueñas M, Abraham A. Lactobacillus plantarum CIDCA 8327: An α-glucan producing-strain isolated from kefir grains. Carbohydr Polym 2017; 170:52-59. [DOI: 10.1016/j.carbpol.2017.04.053] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/07/2017] [Accepted: 04/19/2017] [Indexed: 12/31/2022]
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13
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Zavala L, Golowczyc MA, van Hoorde K, Medrano M, Huys G, Vandamme P, Abraham AG. Selected Lactobacillus strains isolated from sugary and milk kefir reduce Salmonella infection of epithelial cells in vitro. Benef Microbes 2016; 7:585-95. [PMID: 27291404 DOI: 10.3920/bm2015.0196] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The isolation of potentially probiotic strains and the subsequent study of their properties are very important steps to gain insight in the health benefits ascribed to sugary and milk kefir. The aim of the present study was to characterise fifteen Lactobacillus strains isolated from these beverages by determining some surface properties and their ability to antagonise enterocyte cell damage after Salmonella infection in vitro. Lactobacillus surface properties were determined by hydrophobicity, autoaggregation, and coaggregation assays with Salmonella. In addition, lactobacilli adhesion to Caco-2/TC-7 cells and the effect on Salmonella invasion were evaluated. Finally, the disassembly of F-actin cytoskeleton on intestinal epithelial cells was assayed in vitro when Salmonella infection was performed in the presence of selected Lactobacillus strains. Ten out of the 15 strains showed a high adhesion capacity to Caco-2/TC-7 cells. Most of the strains were hydrophilic and non-autoaggregating. Strains isolated from sugary kefir were non-coaggregating with Salmonella, while strains Lactobacillus paracasei CIDCA 83120, 83121, 83123, 83124, 8339, 83102 isolated from milk kefir were able to coaggregate after 1 h. L. paracasei CIDCA 8339 and Lactobacillus kefiri CIDCA 83102 were able to diminish Salmonella invasion to the enterocytes. An antagonistic effect on cytoskeleton disruption elicited by the pathogen was also demonstrated. Our results suggest that both strains isolated from milk kefir could be considered as appropriate probiotic candidates.
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Affiliation(s)
- L Zavala
- 1 Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, CONICET, UNLP), 47 and 116, 1900 La Plata, Argentina
| | - M A Golowczyc
- 1 Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, CONICET, UNLP), 47 and 116, 1900 La Plata, Argentina
| | - K van Hoorde
- 2 Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium.,3 Laboratory of Biochemistry and Brewing, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium
| | - M Medrano
- 1 Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, CONICET, UNLP), 47 and 116, 1900 La Plata, Argentina
| | - G Huys
- 2 Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium.,4 BCCM/LMG Bacteria Collection, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - P Vandamme
- 2 Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - A G Abraham
- 1 Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA, CONICET, UNLP), 47 and 116, 1900 La Plata, Argentina.,5 Área Bioquímica y Control de Alimentos, Facultad de Ciencias Exactas, UNLP, 47 and 116, 1900 La Plata, Argentina
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14
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Hamet M, Medrano M, Pérez P, Abraham A. Oral administration of kefiran exerts a bifidogenic effect on BALB/c mice intestinal microbiota. Benef Microbes 2016; 7:237-46. [DOI: 10.3920/bm2015.0103] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The activity of kefiran, the exopolysaccharide present in kefir grains, was evaluated on intestinal bacterial populations in BALB/c mice. Animals were orally administered with kefiran and Eubacteria, lactobacilli and bifidobacteria populations were monitored in faeces of mice at days 0, 2, 7, 14 and 21. Profiles obtained by Denaturing Gradient Gel Electrophoresis (DGGE) with primers for Eubacteria were compared by principal component analysis and clearly defined clusters, correlating with the time of kefiran consumption, were obtained. Furthermore, profile analysis of PCR products amplified with specific oligonucleotides for bifidobacteria showed an increment in the number of DGGE bands in the groups administered with kefiran. Fluorescent In Situ Hybridisation (FISH) with specific probes for bifidobacteria showed an increment of this population in faeces, in accordance to DGGE results. The bifidobacteria population was also studied on distal colon content after 0, 2 and 7 days of kefiran administration. Analysis of PCR products by DGGE with Eubacteria primers showed an increment in the number and intensity of bands with high GC content of mice administered with kefiran. Sequencing of DGGE bands confirmed that bifidobacteria were one of the bacterial populations modified by kefiran administration. DGGE profiles of PCR amplicons obtained by using Bifidobacterium or Lactobacillus specific primers confirmed that kefiran administration enhances bifidobacteria, however no changes were observed in Lactobacillus populations. The results of the analysis of bifidobacteria populations assessed on different sampling sites in a murine model support the use of this exopolysaccharide as a bifidogenic functional ingredient.
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Affiliation(s)
- M.F. Hamet
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos, CCT La Plata, CONICET-UNLP, 47 y 116 (s/n), La Plata 1900, Argentina
| | - M. Medrano
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos, CCT La Plata, CONICET-UNLP, 47 y 116 (s/n), La Plata 1900, Argentina
| | - P.F. Pérez
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos, CCT La Plata, CONICET-UNLP, 47 y 116 (s/n), La Plata 1900, Argentina
- Cátedra de Microbiología, Facultad de Ciencias Exactas, UNLP, 47 y 115, La Plata 1900, Argentina
| | - A.G. Abraham
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos, CCT La Plata, CONICET-UNLP, 47 y 116 (s/n), La Plata 1900, Argentina
- Área Bioquímica y Control de Alimentos, Facultad de Ciencias Exactas, UNLP, 47 y 115, La Plata 1900, Argentina
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Medrano M, Maiz E, Maldonado-Martín S, Arenaza L, Rodríguez-Vigil B, Ortega F, Ruiz J, Larrarte E, Diez-López I, Sarasúa-Miranda A, Tobalina I, Barrenechea L, Pérez-Asenjo J, Kannengiesser S, Manhães-Savio A, Echaniz O, Labayen I. The effect of a multidisciplinary intervention program on hepatic adiposity in overweight-obese children: protocol of the EFIGRO study. Contemp Clin Trials 2015; 45:346-355. [DOI: 10.1016/j.cct.2015.09.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/14/2015] [Accepted: 09/21/2015] [Indexed: 02/07/2023]
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16
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Quesada-Masachs E, de Inocencio J, Monteaudo I, Nieto J, Murias S, Antόn J, Calzada J, Medrano M, Calvo I, Modesto C. AB0971 Cervical Spine Involvement as a Presenting Manifestation in Juvenile Idiopathic Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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17
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Calzada-Hernández J, Anton J, Núñez E, Mellado M, Martín F, Fernández L, Calvo I, Baquero F, Leis R, Eizaguirre F, Goycochea W, Donat E, Medrano M, Crespo L, Vegas A, Sevilla B, Peña L, Alcobendas R, Guillén S, Tagarro A, Noguera A. THU0513 Diagnosis of Tuberculosis Infection in Pediatric Patients Treated with Tumor Necrosis Factor Alpha Inhibitors; A Multicenter Spanish Study Comparing IGRA and Tuberculin Skin Tests. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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18
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Olmos P, Rapisarda D, Rueda F, Arranz F, Barrera G, Brañas B, García A, Medrano M, Olalde J, Maqueda L. Stability of the LIPAc beam dump to vibrations induced by the cooling flow. Fusion Engineering and Design 2014. [DOI: 10.1016/j.fusengdes.2014.01.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Calvo Penadés I, Antόn Lόpez J, Bustabad S, Camacho M, De Inocencio J, Gamir M, Graña G, La Cruz L, Lόpez-Robledillo J, Medrano M, Merino R, Modesto C, Nuñez E, Rua M, Torrente V, Vargas C, Carmona L, Loza E. AB0895 Consensus Statement on the Transition Process from Pediatric Care to Adult Care in Patients with Chronic Inflammatory Rheumatic Diseases with Childhood-Onset. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sifuentes Giraldo WA, Guillén Astete CA, Gámir Gámir ML, Arnal Guimerá C, Clemente Garulo D, Calvo I, Rotes I, Sampedro Álvarez J, García Consuegra J, Medrano M, Collado P, Roldán R, Bustabad S. PReS-FINAL-2115: Differences in musculoskeletal clinical expression between Spanish and Mexican patients with juvenile spondyloarthritis: data from the Mexespa project. Pediatr Rheumatol Online J 2013. [PMCID: PMC4043466 DOI: 10.1186/1546-0096-11-s2-p127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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21
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Sifuentes Giraldo WA, Guillén Astete CA, Gámir Gámir ML, Arnal Guimeral C, Clemente Garulo D, Calvo I, Rotes I, Sampedro Alvarez J, García Consuegra J, Medrano M, Collado P, Roldán R, Bustabad S. AB0701 Difference in musculoskeletal clinical expression among spanish and mexican patients with juvenile spondyloarthritis: data from the mexespa project. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.3023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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22
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Barriga A, Medrano M, De-Juan J, Burgos J. [Intravenous infusion of adult adipose tissue stem cells for repairing spinal cord ischaemic lesions. An experimental study on animals]. Rev Esp Cir Ortop Traumatol (Engl Ed) 2013; 57:89-94. [PMID: 23608207 DOI: 10.1016/j.recot.2013.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Revised: 01/16/2013] [Accepted: 01/17/2013] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE To assess if a peripheral intravenous infusion of adipose tissue stem cells (ATSC), after an ischemic spinal cord injury can promote selective cell migration and cell survival in the damaged neural tissue. ANIMALS AND METHOD: An ischaemic spinal cord injury was provoked by trapping the abdominal aorta for 20 minutes in 11 male New Zealand rabbits (2.5±0.5kg). They were randomised into two groups: one group (n=5) received an intravenous transfusion of 10±2×10(6) ATSC at 24 hours from the injury, and the control group (n=6) were only given the vehicle. The functional status was assessed, using the Tarlov scale at 24h, and 7 and 14 days. The animals were sacrificed at 14 days and a histological and immunohistochemical study was performed. RESULTS Complete paraplegia was achieved in both groups. There were no significant differences as regards neurological recovery, which was nil in both cases. In the histological and immunohistochemical study, it was tested to see if there was any bromodeoxyuridine-marked ATSC in the area of the lesion, but there was only a small amount. CONCLUSION ATSC are able to migrate and survive in the injured spinal cord after aortic ischaemia after they have been administered intravenously. Intravenous infusion is a harmless procedure with no side effect. No neurological recovery was achieved.
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Affiliation(s)
- A Barriga
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Nacional de Parapléjicos, Toledo, España; Universidad de Castilla-La Mancha, Toledo, España.
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23
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Vargas F, Rivas C, Medrano M. Interaction of emodin, aloe-emodin, and rhein with human serum albumin: a fluorescence spectroscopic study. Toxicol Mech Methods 2012; 14:227-31. [PMID: 20021135 DOI: 10.1080/15376520490434467] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The interaction of the dihydroxyanthraquinones, emodin (1), aloe-emodin (2), and rhein (3) with human serum albumin (HSA) has been studied through fluorescence spectroscopy. Quenching studies and the association constant of the anthraquinoid compounds 1, 2, and 3 in the presence of HSA were estimated. The binding and quenching studies suggest that only emodin (1) may serve as a useful fluorescence probe for structure/function studies of different emodin binding proteins. No photoinduced binding was observed after irradiation of compounds 1, 2, and 3 in presence of human serum albumin.
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Affiliation(s)
- F Vargas
- Laboratorio de Fotoquímica, Centro de Química, Instituto Venezolano de Investigaciones Científicas I.V.I.C., Caracas, Venezuela
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Medrano M, Requerey R, Karron JD, Herrera CM. Herkogamy and mate diversity in the wild daffodil Narcissus longispathus: beyond the selfing-outcrossing paradigm in the evolution of mixed mating. Plant Biol (Stuttg) 2012; 14:801-810. [PMID: 22443123 DOI: 10.1111/j.1438-8677.2012.00569.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Spatial separation of male and female reproductive structures (herkogamy) is a widespread floral trait that has traditionally been viewed as an adaptation that reduces the likelihood of self-pollination. Here we propose that increased herkogamy may also influence another important aspect of plant mating: the diversity of pollen donors siring seeds within fruits. We test this hypothesis in Narcissus longispathus, a wild daffodil species with extensive variation in anther-stigma separation. To study the morphological basis of variation in herkogamy, floral measurements were undertaken in 16 populations of N. longispathus. We then quantified multilocus outcrossing rates and the correlation of outcrossed paternity in three of these populations sampled over several years. Mating system estimates were calculated for each population and year, and also separately for groups of plants that differed markedly in herkogamy within each population and year. In N. longispathus herkogamy was much more variable than other floral traits, and was more closely related to style length than to anther position. Averaged across populations and years, plants with high herkogamy had similar outcrossing rates (0.683) to plants with intermediate (0.648) or low herkogamy (0.590). However, a significant linear trend was found for correlation of outcrossed paternity, which increased monotonically from high herkogamy (0.221), through intermediate herkogamy (0.303) to low herkogamy (0.463) plants. The diversity of pollen donors siring seeds of high herkogamy Narcissus flowers was thus consistently greater than the diversity of pollen donors siring seeds of low herkogamy flowers. Results of this study contribute to the emerging consensus that floral traits can simultaneously influence several aspects of plant mating system in complex ways, thus extending the traditional focus centred exclusively on patterns and relative importance of self- and cross-fertilisation.
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Affiliation(s)
- M Medrano
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Isla de La Cartuja, Sevilla, Spain Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - R Requerey
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Isla de La Cartuja, Sevilla, Spain Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - J D Karron
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Isla de La Cartuja, Sevilla, Spain Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - C M Herrera
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Isla de La Cartuja, Sevilla, Spain Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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25
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Ruas-Madiedo P, Medrano M, Salazar N, De Los Reyes-Gavilán CG, Pérez PF, Abraham AG. Exopolysaccharides produced by Lactobacillus and Bifidobacterium strains abrogate in vitro the cytotoxic effect of bacterial toxins on eukaryotic cells. J Appl Microbiol 2010; 109:2079-86. [PMID: 20846331 DOI: 10.1111/j.1365-2672.2010.04839.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
AIMS To evaluate the capability of the exopolysaccharides (EPS) produced by lactobacilli and bifidobacteria from human and dairy origin to antagonize the cytotoxic effect of bacterial toxins. METHODS AND RESULTS The cytotoxicity of Bacillus cereus extracellular factors on Caco-2 colonocytes in the presence/absence of the EPS was determined by measuring the integrity of the tissue monolayer and the damage to the cell membrane (extracellular lactate dehydrogenase activity). Additionally, the protective effect of EPS against the haemolytic activity of the streptolysin-O was evaluated on rabbit erythrocytes. The EPS produced by Bifidobacterium animalis ssp. lactis A1 and IPLA-R1, Bifidobacterium longum NB667 and Lactobacillus rhamnosus GG were able to counteract the toxic effect of bacterial toxins on the eukaryotic cells at 1mg ml(-1) EPS concentration. The EPS A1 was the most effective in counteracting the effect of B. cereus toxins on colonocytes, even at lower doses (0·5mg ml(-1) ), whereas EPS NB667 elicited the highest haemolysis reduction on erythrocytes. CONCLUSIONS The production of EPS by lactobacilli and bifidobacteria could antagonize the toxicity of bacterial pathogens, this effect being EPS and biological marker dependent. SIGNIFICANCE AND IMPACT OF THE STUDY This work allows gaining insight about the mechanisms that probiotics could exert to improve the host health.
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Affiliation(s)
- P Ruas-Madiedo
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias, Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain.
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26
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Medrano M, Pérez AT, Lobry L, Peters F. Electrophoretic mobility of silica particles in a mixture of toluene and ethanol at different particle concentrations. Langmuir 2009; 25:12034-12039. [PMID: 19754057 DOI: 10.1021/la900686a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this paper we present measurements of the electrophoretic mobility of colloidal particles by using heterodyne detection of light scattering. The measurements have been made up to concentrations of 5.4% silica nanoparticles, with a diameter on the order of 80 nm, in a mixture of 70% toluene and 30% ethanol. To make possible the measurements at these concentrations, the liquid mixture is chosen so as to match the index of refraction of the particles, thus resulting in a transparent suspension.
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Affiliation(s)
- M Medrano
- Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla, Spain
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27
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Rincón E, Botija J, García A, Medrano M, Sarasola X, Soleto A, Ciattaglia E, Walker C, Doceul L, Balshaw N, Petrizzi L. Thermal and hydraulic analysis of the cooling system for the ITER equatorial port plugs. Fusion Engineering and Design 2009. [DOI: 10.1016/j.fusengdes.2008.12.097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Richou M, Durocher A, Medrano M, Martinez-Oña R, Moysan J, Riccardi B. Data merging of infrared and ultrasonic images for plasma facing components inspection. Fusion Engineering and Design 2009. [DOI: 10.1016/j.fusengdes.2008.12.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Barrera G, Brañas B, Lucas J, Doncel J, Medrano M, García A, Giancarli L, Ibarra A, Li Puma A, Maisonnier D, Sardain P. Conceptual design of the blanket mechanical attachment for the helium-cooled lithium–lead reactor. Fusion Engineering and Design 2008. [DOI: 10.1016/j.fusengdes.2007.04.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fuentes C, Liniers M, Guasp J, Botija J, Doncel J, Sarasola X, Wolfers G, Alonso J, Carrasco R, Marcon G, Acedo M, Sanchez E, Weber M, Medrano M, Soleto A, Tera J, Ciric D. Power transmission of the neutral beam heating beams at TJ-II. Fusion Engineering and Design 2007. [DOI: 10.1016/j.fusengdes.2007.07.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Medrano M, Puente D, Arenaza E, Herrazti B, Paule A, Brañas B, Orden A, Domínguez M, Stainsby R, Maisonnier D, Sardain P. Power conversion cycles study for He-cooled reactor concepts for DEMO. Fusion Engineering and Design 2007. [DOI: 10.1016/j.fusengdes.2007.04.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rey PJ, Herrera CM, Guitián J, Cerdá X, Sánchez-Lafuente AM, Medrano M, Garrido JL. The geographic mosaic in predispersal interactions and selection on Helleborus foetidus (Ranunculaceae). J Evol Biol 2006; 19:21-34. [PMID: 16405573 DOI: 10.1111/j.1420-9101.2005.00992.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [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
We examine the hierarchical geographic structure of the interaction between a plant, Helleborus foetidus, and its floral herbivores and pollinators (interactors). Six populations from three distant regions of the Iberian Peninsula were used to examine intra- and inter-regional variation in plant traits, interactors and plant fecundity, and to compare, through selection gradient and path analyses, which traits were under selection, and which interactors were responsible for differential selection. Geographic and temporal congruency in interactor-mediated selection was further tested using a recent analytical approach based on multi-group comparison in Structural Equation Models. Most plant traits, interactors and fecundity differed among regions but not between populations. Similarly, the identity of the traits under selection, the selection gradients (strength and/or the direction of the selection) and the path coefficients (identifying the ecological basis for selection) varied inter- but not intra-regionally. Results show a selection mosaic at the broad scale and, for some traits, a link of differential selection to trait differentiation.
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Affiliation(s)
- P J Rey
- Departamento de Biología Animal, Biología Vegetal y Ecología, Area de Ecología, Universidad de Jaén, Jaén, Spain.
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Abstract
BACKGROUND Factors that modify risk related to APOE variants have been examined primarily in unrelated patients and controls, but seldom in family-based studies. Stroke, vascular risk factors, estrogen replacement therapy (ERT), head injury (HI), and smoking have been reported to influence risk of sporadic but not familial Alzheimer disease (AD). OBJECTIVES To examine the potential relationship between these risk factors and APOE, the authors used a family study design in a population in which the APOE-epsilon4 variant is strongly associated with risk of AD. METHODS Latino families primarily from the Caribbean Islands in which two or more living relatives had dementia were identified in the New York City metropolitan area, the Dominican Republic, and Puerto Rico. A total of 1,498 participants from 350 families underwent a clinical interview, medical and neurologic examinations, neuropsychological testing, and APOE genotyping. Diagnosis was made by consensus using research criteria for AD. RESULTS APOE-epsilon4 was associated with a nearly twofold increased risk of AD. A history of stroke was also associated with a fourfold increased risk. A statistical interaction between APOE-epsilon4 and stroke was observed. Women with an APOE-epsilon4 who took ERT did not have an increased risk of AD, but in women with a history of stroke ERT was a deleterious effect modifier. CONCLUSIONS APOE-epsilon4 and stroke independently increase risk of familial Alzheimer disease (AD) among Latinos, and may interact to further increase AD risk. Among women, the risk of AD associated with APOE-epsilon4 may be attenuated by a history of ERT.
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Affiliation(s)
- G A Rippon
- Department of Neurology, Gertrude H. Sergievsky Center, Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University College of Physicians and Surgeons, New York, NY, USA
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Fernández A, Sarksyan K, Matveev N, García A, Medrano M, Doane J, Moeller C, Doncel J, Pardo A, Cappa A, Castejón F, Khartchev N, Tereschenko M, Tolkachev A, Catalán G. Status of the TJ-II Electron Bernstein Waves heating project. Fusion Engineering and Design 2005. [DOI: 10.1016/j.fusengdes.2005.06.309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Medrano M, Alonso C, Herrera CM. Mating system, sex ratio, and persistence of females in the gynodioecious shrub Daphne laureola L. (Thymelaeaceae). Heredity (Edinb) 2005; 94:37-43. [PMID: 15292912 DOI: 10.1038/sj.hdy.6800550] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Although in gynodioecious populations male steriles require a fecundity advantage to compensate for their gametic disadvantage, southern Spanish populations of the long-lived shrub Daphne laureola do not show any fecundity advantage over hermaphrodites in terms of seed production and early seedling establishment. By using allozyme markers, we assess the mating system of this species in five populations differing in sex ratio, and infer levels of inbreeding depression over the whole life cycle by comparing the inbreeding coefficients at the seed and adult plant stages. Extremely low outcrossing rates (0.001<t<0.125) were consistently found for hermaphrodites in all populations, whereas, as expected, female progeny were entirely outcrossed. In most populations, offspring were much more inbred than their parents, and heterozygosity of adults was greater than expected from outcrossing rate estimates, with very few selfed progeny appearing to reproduce in the field. The combination of extensive selfing in hermaphrodites and a strong inbreeding depression expressed late in the life cycle (and thus, only estimable by indirect measures based on genetic markers) may explain the persistence and high frequency of D. laureola females in southern Spanish populations.
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Affiliation(s)
- M Medrano
- Estación Biológica de Doñana, CSIC, Apartado 1056, E-41080, Spain.
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Lee JH, Mayeux R, Mayo D, Mo J, Santana V, Williamson J, Flaquer A, Ciappa A, Rondon H, Estevez P, Lantigua R, Kawarai T, Toulina A, Medrano M, Torres M, Stern Y, Tycko B, Rogaeva E, George-Hyslop PS, Knowles JA. Fine mapping of 10q and 18q for familial Alzheimer's disease in Caribbean Hispanics. Mol Psychiatry 2004; 9:1042-51. [PMID: 15241431 PMCID: PMC1578737 DOI: 10.1038/sj.mp.4001538] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Familial Alzheimer's disease (AD [MIM 104300]) has been a focus of intense investigation, primarily in Caucasian families from Europe and North America families. Although the late-onset form of familial AD, beginning after age 65 years, has been linked to regions on chromosomes 10q and 12p, the specific genetic variants have not yet been consistently identified. Using a unique cohort of families of Caribbean Hispanics ancestry, we screened the genome using 340 markers on 490 family members from 96 families with predominantly late-onset AD. We observed the strongest support for linkage on 18q (LOD=3.14). However, 17 additional markers (chromosomes 1-6, 8, 10, 12, and 14) exceeded a two-point LOD score of 1.0 under the affecteds-only autosomal dominant model or affected sibpair model. As we previously reported the fine-mapping effort on 12p showing modest evidence of linkage, we focused our fine-mapping efforts on two other candidate regions in the current report, namely 10q and 18q. We added 31 family members and eight additional Caribbean Hispanic families to fine map 10q and 18q. With additional microsatellite markers, the evidence for linkage for 18q strengthened near 112 cM, where the two-point LOD score for D18S541 was 3.37 and the highest NPL score in that region was 3.65 (P=0.000177). This narrow region contains a small number of genes expressed in the brain. However, at 10q (134-138 cM), the NPL score decreased from 3.15 (P=0.000486) to 2.1 (P=0.0218), but two broad peaks remained overlapping with previously reported peaks. Our results provide modest support for linkage on 10q and 12p in this cohort of Caribbean Hispanic families with familial Alzheimer's disease, and strong evidence for a new locus on 18q.
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Affiliation(s)
- JH Lee
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
- Department of Epidemiology, School of Public Health, Columbia University, New York, USA
| | - R Mayeux
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
- Department of Neurology, College of Physicians Surgeons, Columbia University, New York, USA
- Department of Psychiatry, College of Physicians Surgeons, Columbia University, New York, USA
- Department of Epidemiology, School of Public Health, Columbia University, New York, USA
| | - D Mayo
- Department of Psychiatry, College of Physicians Surgeons, Columbia University, New York, USA
- The Columbia Genome Center, Columbia University, New York, USA
- The New York State Psychiatric Institute, New York, USA
| | - J Mo
- Department of Psychiatry, College of Physicians Surgeons, Columbia University, New York, USA
- The Columbia Genome Center, Columbia University, New York, USA
- The New York State Psychiatric Institute, New York, USA
| | - V Santana
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
| | - J Williamson
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
| | - A Flaquer
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
| | - A Ciappa
- Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, USA
| | - H Rondon
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
- The Plaza de la Salud Hospital, Dominican Republic
| | - P Estevez
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
| | - R Lantigua
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- Department of Medicine, College of Physicians Surgeons, Columbia University, New York, USA
| | - T Kawarai
- Centre for Research in Neurodegenerative Diseases, University of Toronto and Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - A Toulina
- Centre for Research in Neurodegenerative Diseases, University of Toronto and Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - M Medrano
- The Universidad Tecnologica de Santiago, Dominican Republic
| | - M Torres
- The Plaza de la Salud Hospital, Dominican Republic
| | - Y Stern
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- The Gertrude H. Sergievsky Center, Columbia University, New York, USA
- Department of Neurology, College of Physicians Surgeons, Columbia University, New York, USA
- Department of Psychiatry, College of Physicians Surgeons, Columbia University, New York, USA
| | - B Tycko
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, USA
| | - E Rogaeva
- Centre for Research in Neurodegenerative Diseases, University of Toronto and Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - P St. George-Hyslop
- Centre for Research in Neurodegenerative Diseases, University of Toronto and Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - JA Knowles
- The Taub Institute on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, USA
- Department of Psychiatry, College of Physicians Surgeons, Columbia University, New York, USA
- The Columbia Genome Center, Columbia University, New York, USA
- The New York State Psychiatric Institute, New York, USA
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Fedriani JM, Rey PJ, Garrido JL, Guitián J, Herrera CM, Medrano M, Sánchez-Lafuente AM, Cerdá X. Geographical variation in the potential of mice to constrain an ant-seed dispersal mutualism. OIKOS 2004. [DOI: 10.1111/j.0030-1299.2004.12782.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Medrano M. ITER site selection studies in Spain. Fusion Engineering and Design 2003. [DOI: 10.1016/s0920-3796(03)00128-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mayeux R, Lee JH, Romas SN, Mayo D, Santana V, Williamson J, Ciappa A, Rondon HZ, Estevez P, Lantigua R, Medrano M, Torres M, Stern Y, Tycko B, Knowles JA. Chromosome-12 mapping of late-onset Alzheimer disease among Caribbean Hispanics. Am J Hum Genet 2002; 70:237-43. [PMID: 11715112 PMCID: PMC384892 DOI: 10.1086/324773] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2001] [Accepted: 10/04/2001] [Indexed: 11/03/2022] Open
Abstract
Linkage to chromosome 12p for familial Alzheimer disease (AD) has been inconsistent. Using 35 markers near the centromere of chromosome 12, we investigated 79 Caribbean Hispanic families with AD. Two-point linkage analysis using affected sib pairs yielded LOD scores of 3.15 at D12S1623 and 1.43 at D12S1042. The LOD score at D12S1623 decreased to 1.62 in families with late-onset (age >65 years) AD (LOAD), but the LOD score at D12S1042 was unchanged. Among families negative for the apolipoprotein E (APOE-epsilon 4) allele, the LOD score for D12S1623 was lower (1.01), whereas that for D12S1042 increased to 1.73. Among families positive for the APOE-epsilon 4 allele, none of the LOD scores reached 1. Multipoint affected-relative-pair analysis showed peaks at D12S1623 (nonparametric linkage [NPL] score 1.52; P=.028) and near D12S1042, at D12S1057 (NPL score 1.57; P=.027). NPL scores for both D12S1623 and D12S1057 increased in families affected with LOAD, but, in APOE-epsilon 4-negative families, only scores for the region flanking D12S1623 remained elevated (NPL score 1.74; P=.013). This study of Caribbean Hispanics with familial AD extends and provides modest evidence of linkage to loci on chromosome 12p. Linkage varied by age at onset of AD and by the presence or absence of the APOE-epsilon 4 allele.
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Affiliation(s)
- R Mayeux
- The Taub Institute on Alzheimer's Disease and the Aging Brain, The Gertrude H. Sergievsky Center and Department of Neurology, School of Public Health, Columbia University, New York, NY 10032, USA.
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40
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Herrera CM, Cerda X, Garcia MB, Guitian J, Medrano M, Rey PJ, Sanchez-Lafuente AM. Floral integration, phenotypic covariance structure and pollinator variation in bumblebee-pollinated Helleborus foetidus. J Evol Biol 2002. [DOI: 10.1046/j.1420-9101.2002.00365.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Athan ES, Williamson J, Ciappa A, Santana V, Romas SN, Lee JH, Rondon H, Lantigua RA, Medrano M, Torres M, Arawaka S, Rogaeva E, Song YQ, Sato C, Kawarai T, Fafel KC, Boss MA, Seltzer WK, Stern Y, St George-Hyslop P, Tycko B, Mayeux R. A founder mutation in presenilin 1 causing early-onset Alzheimer disease in unrelated Caribbean Hispanic families. JAMA 2001; 286:2257-63. [PMID: 11710891 DOI: 10.1001/jama.286.18.2257] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT Genetic determinants of Alzheimer disease (AD) have not been comprehensively examined in Caribbean Hispanics, a population in the United States in whom the frequency of AD is higher compared with non-Hispanic whites. OBJECTIVE To identify variant alleles in genes related to familial early-onset AD among Caribbean Hispanics. DESIGN AND SETTING Family-based case series conducted in 1998-2001 at an AD research center in New York, NY, and clinics in the Dominican Republic. PATIENTS Among 206 Caribbean Hispanic families with 2 or more living members with AD who were identified, 19 (9.2%) had at least 1 individual with onset of AD before the age of 55 years. MAIN OUTCOME MEASURE The entire coding region of the presenilin 1 gene and exons 16 and 17 of the amyloid precursor protein gene were sequenced in probands from the 19 families and their living relatives. RESULTS A G-to-C nucleotide change resulting in a glycine-alanine amino acid substitution at codon 206 (Gly206Ala) in exon 7 of presenilin 1 was observed in 23 individuals from 8 (42%) of the 19 families. A Caribbean Hispanic individual with the Gly206Ala mutation and early-onset familial disease was also found by sequencing the corresponding genes of 319 unrelated individuals in New York City. The Gly206Ala mutation was not found in public genetic databases but was reported in 5 individuals from 4 Hispanic families with AD referred for genetic testing. None of the members of these families were related to one another, yet all carriers of the Gly206Ala mutation tested shared a variant allele at 2 nearby microsatellite polymorphisms, indicating a common ancestor. No mutations were found in the amyloid precursor protein gene. CONCLUSIONS The Gly206Ala mutation was found in 8 of 19 unrelated Caribbean Hispanic families with early-onset familial AD. This genetic change may be a prevalent cause of early-onset familial AD in the Caribbean Hispanic population.
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Affiliation(s)
- E S Athan
- The Gertrude H. Sergievsky Center, Columbia University College of Physicians and Surgeons, 630 W 168th St, New York, NY 10032, USA
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Ascası́bar E, Alejaldre C, Alonso J, Almoguera L, Baciero A, Balbı́n R, Blaumoser M, Botija J, Brañas B, de la Cal E, Cappa A, Castellano J, Carrasco R, Castejón F, Cepero J, Cremy C, Doncel J, Eguilior S, Estrada T, Fernández A, Fuentes C, Garcı́a A, Garcı́a-Cortés I, Guasp J, Herranz J, Hidalgo C, Jiménez J, Kirpitchev I, Krivenski V, Labrador I, Lapayese F, Likin K, Liniers M, López-Fraguas A, López-Sánchez A, de la Luna E, Martı́n R, Martı́nez-Laso L, Medrano M, Méndez P, McCarthy K, Medina F, van Milligen B, Ochando M, Pacios L, Pastor I, Pedrosa M, de la Peña A, Portas A, Qin J, Rodrı́guez-Rodrigo L, Romero J, Salas A, Sánchez E, Sánchez J, Tabarés F, Tafalla D, Tribaldos V, Vega J, Zurro B. Overview of TJ-II flexible heliac results. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(01)00237-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Martı́nez_Laso L, Liniers M, Alonso J, Botija J, Garcı́a A, Medrano M. TJ-II neutral beam injectors control and data acquisition system. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(01)00349-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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44
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Herrera CM, Sánchez-Lafuente AM, Medrano M, Guitián J, Cerdá X, Rey P. Geographical variation in autonomous self-pollination levels unrelated to pollinator service in Helleborus foetidus (Ranunculaceae). Am J Bot 2001. [PMID: 11410466 DOI: 10.2307/2657084] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Autonomous self-pollination may be considered as a mechanism enhancing plant reproductive success when plant access to pollen sources may limit seed production. We have studied the relationship between geographical patterns of variation in pollinator service to Helleborus foetidus and self-pollination ability in three widely spaced regions in the Iberian Peninsula. As could be expected from its early flowering period, pollinator visitation rates to both plants and flowers of H. foetidus were very low at all sites. Pollinator composition remained consistent among regions, but there was significant variation among regions in pollinator service. Despite the low visitation rates, fruit set did not appear to be pollen limited in any of the study areas, which may be explained by the long duration of flowers (up to 20 d). When pollinators were excluded experimentally, fruit set decreased significantly, but substantial levels of self-pollination occurred at all regions. Autonomous self-pollination levels were lowest in the two regions with lowest pollinator service and highest in the region with highest pollinator service. This disagreement between our results and the expectations derived from the reproductive assurance hypothesis may reflect a nonequilibrium situation of the northern H. foetidus populations in relation to their current pollinating environment.
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Affiliation(s)
- C M Herrera
- Estación Biológica de Doñana, CSIC, Apartado 1056, E-41080 Sevilla, Spain
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45
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Iñiguez C, Mauri J, Medrano M, Larrodé P, Santos S, Pina J, Morales F. [Sjögren's syndrome and multiple sclerosis]. Neurologia 2001; 16:232-5. [PMID: 11412725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
INTRODUCTION Multiple sclerosis (MS) usually follows a relapsing-remitting course and attacks multiple areas of the central nervous system (CNS). Certain rheumatic diseases, including Sjögren's syndrome (SS), can present with a similar clinical picture. RESULTS Two patients out 67 of 100 with MS exhibited xerophthalmia and xerostomia and positive Ro antibodies, thus fulfilling 55 diagnostic criteria. Case 1. A 62-year-old woman developed several episodes of numbress and weakness in her left extremity and ataxia. MRI demonstrated a high-intensity areas in periventricular white matter. Initial laboratory studies failure to demonstrate antinuclear antibodies. Xerostomia and xerophthalmia were apparent. Follow-up laboratory examinations showed elevated ANA, Anti-SSA and anti-SSB. Case 2. A 58-year-old woman was diagnosed as having MS at the age of 53 years. Several high-signal foci on MRI were demonstrated in the white matter. Initial serum findings including autoantibodies were unremarkable. Sicca syndrome was present. Laboratory investigations included elevated anti-SSA, anti-SSARo52 and ANA while anti-SSB was within normal limits. DISCUSSION Primary SS is a chronic autoimmune inflammatory disease of unknown etiology. The CNS symptoms are present in 20-25% of the patients with SS. Some patients have a relapsing-remitting course mimicking MS. Focal brain lesions in SS can occur in the cerebral white matter. The features of our patients sufficiently mimicked those of MS and this disorder was the diagnosis in each patient at the time of initial evaluation. SS should be considered in th
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Affiliation(s)
- C Iñiguez
- Neurología. Hospital Clínico Universitario. Zaragoza.
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Pérez-Santonja JJ, Medrano M, Ruiz-Moreno JM, Cardona-Ausina C, Alió JL. [Circular flap rhexis: a refinement technique for LASIK re-treatment]. Arch Soc Esp Oftalmol 2001; 76:303-8. [PMID: 11373706] [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: 04/16/2023]
Abstract
PURPOSE To describe a new approach to re-treatment after Laser in situ keratomileusis (LASIK) by means of lifting the corneal flap in order to decrease the epithelial damage and its related complications, such as epithelial ingrowth and flap melting, which are more frequent after LASIK re-treatment than after primary LASIK. MATERIAL AND METHODS The new technique, called circular flap rhexis, is based on a careful flap edge identification, linear epithelial tear for minimizing epithelial irregularities and defects, and a delicate flap replacement to promote a strong adhesion between the flap edge and the stromal bed. The LASIK re-treatment with this flap rhexis technique was performed in 43 eyes at 3 or 6 months after the primary LASIK. After a 12 month follow-up, the epithelial ingrowth and flap melting rates were recorded. RESULTS Epithelial growth was found in 9.3% of the cases (4 out of 43 eyes) and flap melting in 2.3% of the cases (1 out of 43) at 12 months after LASIK re-treatment by circular flap rhexis. These disorders were always peripheral and did not affect visual acuity or corneal astigmatism. CONCLUSION LASIK re-treatment using circular flap rhexis is an effective technique to decrease the epithelium related complications after LASIK re-treatment.
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Affiliation(s)
- J J Pérez-Santonja
- Unidad de Cirugía Refractiva y Córnea, Instituto Oftalmológico de Alicante, Facultad de Medicina, Universidad Miguel Hernández, Alicante, España
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47
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Diez M, Medrano M, Mugüerza JM, Ramos P, Hernandez P, Villeta R, Martín A, Noguerales F, Ruiz A, Granell J. Influence of tumor localization on the prognostic value of P53 protein in colorectal adenocarcinomas. Anticancer Res 2000; 20:3907-12. [PMID: 11268475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
BACKGROUND The prevalence of genetic alterations is different in primary carcinomas from the proximal colon when compared with carcinomas from the distal colorectum. The objective of this work was to explore the existence of possible differences in the informative weight of the risk of tumor recurrence provided by p53 immunostaining depending on the localization of the neoplasm. PATIENTS AND METHODS Nuclear immunohistochemical expression of p53 protein was determined in formalin-fixed paraffin-embedded archival tumor tissue samples from 190 primary colorectal adenocarcinomas. The relative prognostic importance on the risk of recurrence of each variable was assessed in a Cox's proportional hazard regression analysis. Multiplicative interaction terms between p53 and tumor site were included in the multivariate models in order to test their joint effect on survival. RESULTS One hundred and one patients (53.1%) manifested nuclear accumulation of the protein. P53 overexpression was more frequent in distal than in proximal tumors (58.5% ve s 41.7%) (p = 0.03). Disease-free survival was lower in p53-positive cases (75% versus 38%) (p = 0.006), but significance of the association varied according to the localization of the tumor (p = 0.004 in proximal carcinomas and p = 0.049 in distal carcinomas). Multivariate analysis identified p53 positivity and distal tumor localization as the factors significantly associated with a high risk of recurrence Interaction between p53 expression and localization was present. P53 exhibited different prognostic value in distal and proximal colon. While adjusted hazard ratio for positive p53 was 1.99 in distal cancers, it was 8.04 for proximal tumors. CONCLUSION The prognostic with value of tumor recurrence associated overexpression of p53 protein is influenced by the location of the tumor. The negative predictive weight is significantly higher in proximal than in distal cancers.
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Affiliation(s)
- M Diez
- Hospital Principe de Asturias, Alcalá de Henares, 28808 Madrid, Spain.
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48
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Romas SN, Mayeux R, Tang MX, Lantigua R, Medrano M, Tycko B, Knowles J. No association between a presenilin 1 polymorphism and Alzheimer disease. Arch Neurol 2000; 57:699-702. [PMID: 10815136 DOI: 10.1001/archneur.57.5.699] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Homozygosity of allele 1 of a presenilin 1 intron 8 polymorphism (PS1-1) has been associated with doubling of the risk of sporadic late-onset Alzheimer disease (LOAD), in some, but not all studies. OBJECTIVE To genotype the PS1 intron 8 polymorphism in predominantly Hispanic families with LOAD to test for association and for linkage between this polymorphism and LOAD. DESIGN A family-based, case-control, genetic-linkage study. SETTING Predominantly Hispanic families were selected from probands who were part of a random sample of 2128 Medicare beneficiaries aged 65 years or older who were residing in the community of Washington Heights, which is located in the northern part of Manhattan, NY. PARTICIPANTS Fifty-one families with 103 affected family members, 67 unaffected family members, and 7 family members with other diagnoses were genotyped for the PS1 polymorphism. All patients met National Institute of Neurological and Communicative Disorders and Stroke-Alzheimer's Disease and Related Disorders Association criteria for either probable or possible Alzheimer disease. Age was truncated at 55 years or older. MAIN OUTCOME MEASURES Association analyses, conditional logistic regression, and traditional linkage methods were applied to the families for the PS1 polymorphism and for the presence of the gene for apolipoprotein E (APOE). Results of the association and conditional logistic regression analyses of PS1 intron 8 polymorphism were subsequently adjusted for the effect of APOE-epsilon4, sex, age, and education of each sibling. RESULTS No association between the PS1 intron 8 polymorphism and LOAD was observed (relative risk, 0.99; 95% confidence interval, 0.3-3.4). An association between presence of the APOE-epsilon4 allele and LOAD (relative risk 4.05; 95% confidence interval, 1.3-12.5) was observed. CONCLUSION We could not confirm the relationship between the PS1 intron 8 polymorphism and LOAD in this collection of families.
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Affiliation(s)
- S N Romas
- Gertrude H. Sergievsky Center, Department of Neurology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
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Medrano M, Guitián P, Guitián J. Patterns of fruit and seed set within inflorescences of Pancratium maritimum (Amaryllidaceae): nonuniform pollination, resource limitation, or architectural effects? Am J Bot 2000; 87:493-501. [PMID: 10766720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We investigated patterns of fruit and seed production on inflorescences of a population of Pancratium maritimum in northwest Spain over a 2-yr period. Initial findings showed that the earliest opening flowers on an inflorescence are more likely to set fruit and produce more seeds than later opening flowers and that this pattern is maintained throughout the flowering season. Supplementary pollination and flower-removal experiments were performed to investigate whether the observed pattern is attributable (a) to variation in pollen receipt, (b) to sequestration of resources by the earliest flowers on an inflorescence, and/or (c) to "architectural" limitations on the fruit/seed production of later flowers. Supplementary pollination did not improve fruit or seed production by late flowers in either of the 2 yr of study. In flower-removal experiments, the remaining flowers showed improved fruit set and mean number of seeds per flower, by comparison with flowers in the same position on control inflorescences. When all flowers except the latest third were removed, these showed fruit set and seed production similar to those of early flowers on control inflorescences. These results strongly suggest that the observed within-inflorescence patterns of fruit and seed production in P. maritimum are mainly attributable to competition for resources (i.e., explanation b), though other adaptive explanations cannot be ruled out.
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Affiliation(s)
- M Medrano
- Laboratorio de Botánica, Facultad de Farmacia, Departamento de Biología Vegetal, Universidad de Santiago de Compostela, Campus Sur s/n, Santiago, E-15706 Spain
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50
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Romas SN, Mayeux R, Rabinowitz D, Tang MX, Zadroga HR, Lantigua R, Medrano M, Tycko B, Knowles JA. The deletion polymorphism and Val1000Ile in alpha-2-macroglobulin and Alzheimer disease in Caribbean Hispanics. Neurosci Lett 2000; 279:133-6. [PMID: 10688047 DOI: 10.1016/s0304-3940(99)00972-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The association between polymorphisms in the alpha-2-macroglobulin (a2m) gene and Alzheimer's disease remains in doubt because of conflicting results in independent case-control and family studies. We examined the association between Alzheimer's disease and alpha2m polymorphisms in Caribbean Hispanic families. The odds of having the alpha2m deletion/insertion polymorphism was increased 3-fold for family members with Alzheimer's disease compared to healthy family members, rising to 5-fold after adjusting for APOE-epsilon4. In contrast, there was no relationship between the alpha2m Val1000Ile polymorphism and Alzheimer's disease in these families. The inconsistencies in studies cited above and the modest association between alpha2m and Alzheimer's disease found in the Caribbean Hispanic families reported here, suggest that the overall effect of this gene on susceptibility is small and may be limited to certain populations or families.
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Affiliation(s)
- S N Romas
- The Taub Institute on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY 10032, USA
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