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Martini G, Belli V, Napolitano S, Ciaramella V, Ciardiello D, Belli A, Izzo F, Avallone A, Selvaggi F, Menegon Tasselli F, Santaniello W, Franco R, Puig I, Ramirez L, Chicote I, Mancuso F, Caratu G, Serres X, Fasani R, Jimenez J, Ros J, Baraibar I, Mulet N, Della Corte CM, Troiani T, Vivancos A, Dienstmann R, Elez E, Palmer HG, Tabernero J, Martinelli E, Ciardiello F, Argilés G. Establishment of patient-derived tumor organoids to functionally inform treatment decisions in metastatic colorectal cancer. ESMO Open 2023; 8:101198. [PMID: 37119788 DOI: 10.1016/j.esmoop.2023.101198] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [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: 12/14/2022] [Revised: 02/16/2023] [Accepted: 02/22/2023] [Indexed: 05/01/2023] Open
Abstract
BACKGROUND Metastatic colorectal cancer (mCRC) patients tend to have modest benefits from molecularly driven therapeutics. Patient-derived tumor organoids (PDTOs) represent an unmatched model to elucidate tumor resistance to therapy, due to their high capacity to resemble tumor characteristics. MATERIALS AND METHODS We used viable tumor tissue from two cohorts of patients with mCRC, naïve or refractory to treatment, respectively, for generating PDTOs. The derived models were subjected to a 6-day drug screening assay (DSA) with a comprehensive pipeline of chemotherapy and targeted drugs against almost all the actionable mCRC molecular drivers. For the second cohort DSA data were matched with those from PDTO genotyping. RESULTS A total of 40 PDTOs included in the two cohorts were derived from mCRC primary tumors or metastases. The first cohort included 31 PDTOs derived from patients treated in front line. For this cohort, DSA results were matched with patient responses. Moreover, RAS/BRAF mutational status was matched with DSA cetuximab response. Ten out of 12 (83.3%) RAS wild-type PDTOs responded to cetuximab, while all the mutant PDTOs, 8 out of 8 (100%), were resistant. For the second cohort (chemorefractory patients), we used part of tumor tissue for genotyping. Four out of nine DSA/genotyping data resulted applicable in the clinic. Two RAS-mutant mCRC patients have been treated with FOLFOX-bevacizumab and mitomycin-capecitabine in third line, respectively, based on DSA results, obtaining disease control. One patient was treated with nivolumab-second mitochondrial-derived activator of caspases mimetic (phase I trial) due to high tumor mutational burden at genotyping, experiencing stable disease. In one case, the presence of BRCA2 mutation correlated with DSA sensitivity to olaparib; however, the patient could not receive the therapy. CONCLUSIONS Using CRC as a model, we have designed and validated a clinically applicable methodology to potentially inform clinical decisions with functional data. Undoubtedly, further larger analyses are needed to improve methodology success rates and propose suitable treatment strategies for mCRC patients.
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Affiliation(s)
- G Martini
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - V Belli
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - S Napolitano
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - V Ciaramella
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - D Ciardiello
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - A Belli
- Hepatobiliary Surgical Oncology Unit, Istituto Nazionale Tumori-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Fondazione G. Pascale, Napoli
| | - F Izzo
- Hepatobiliary Surgical Oncology Unit, Istituto Nazionale Tumori-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Fondazione G. Pascale, Napoli
| | - A Avallone
- Experimental Clinical Abdominal Oncology Unit, Istituto Nazionale Tumori-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Fondazione G. Pascale, Napoli
| | - F Selvaggi
- Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - F Menegon Tasselli
- Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - W Santaniello
- Hepatobiliary Surgical Oncology Unit, AORN Cardarelli, Naples
| | - R Franco
- Pathology Unit, Department of Mental and Physical Health and Preventive Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - I Puig
- Translational Program, Stem Cells and Cancer Laboratory, Vall D'Hebron Institute of Oncology (VHIO), Barcelona
| | - L Ramirez
- Translational Program, Stem Cells and Cancer Laboratory, Vall D'Hebron Institute of Oncology (VHIO), Barcelona
| | - I Chicote
- Translational Program, Stem Cells and Cancer Laboratory, Vall D'Hebron Institute of Oncology (VHIO), Barcelona
| | - F Mancuso
- Cancer Genomics Group, Vall d'Hebron Institute of Oncology (VHIO), Barcelona
| | - G Caratu
- Cancer Genomics Group, Vall d'Hebron Institute of Oncology (VHIO), Barcelona
| | - X Serres
- Department of Interventional Radiology, Hospital Universitari Vall d'Hebron, Barcelona
| | - R Fasani
- Molecular Oncology Lab, Vall d'Hebron Institute of Oncology, Barcelona
| | - J Jimenez
- Molecular Oncology Lab, Vall d'Hebron Institute of Oncology, Barcelona
| | - J Ros
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona
| | - I Baraibar
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona
| | - N Mulet
- B-ARGO Badalona Applied Research Group in Oncology, Catalan Institute of Oncology, Badalona
| | - C M Della Corte
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - T Troiani
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - A Vivancos
- Cancer Genomics Group, Vall d'Hebron Institute of Oncology (VHIO), Barcelona
| | - R Dienstmann
- Oncology Data Science, Vall d'Hebron Institute of Oncology, Barcelona
| | - E Elez
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona
| | - H G Palmer
- Translational Program, Stem Cells and Cancer Laboratory, Vall D'Hebron Institute of Oncology (VHIO), Barcelona
| | - J Tabernero
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona
| | - E Martinelli
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - F Ciardiello
- Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples
| | - G Argilés
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona; Universitat Autònoma de Barcelona, Barcelona, Spain; Memorial Sloan Kettering Cancer Center, New York, USA.
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Ortiz A, Quiroga B, Díez J, Escalada San Martín FJ, Ramirez L, Pérez Maraver M, Martínez-Berganza Asensio ML, Arranz Arija JÁ, Alvarez-Ossorio Fernández JL, Córdoba R, Brotons Muntó F, Cancelo Hidalgo MJ, Carles Reverter J, Plasencia-Rodríguez C, Carretera Gómez J, Guijarro C, Freijo Guerrero MDM, de Sequera P. The Spanish Scientific Societies before the ESC 2021 guidelines on vascular disease prevention: Generalizing the measurement of albuminuria to identify vascular risk and prevent vascular disease. Nefrologia 2023; 43:245-250. [PMID: 37407308 DOI: 10.1016/j.nefroe.2023.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 07/07/2023] Open
Abstract
The 2021 guidelines on the prevention of vascular disease (VD) in clinical practice published by the European Society of Cardiology (ESC) and supported by 13 other European scientific societies recognize the key role of screening for chronic kidney disease (CKD) in the prevention of VD. Vascular risk in CKD is categorized based on measurements of estimated glomerular filtration rate (eGFR) and urine albumin to creatinine ratio (ACR). Thus, moderate CKD is associated with a high vascular risk and severe CKD with a very high vascular risk requiring therapeutic action, and there is no need to apply other vascular risk scores when vascular risk is already very high due to CKD. Moreover, the ESC indicates that vascular risk assessment and the subsequent decision algorithm should start with measurement of eGFR and ACR. To optimize the implementation of the ESC 2021 guidelines on the prevention of CVD in Spain, we consider that: 1) Urine testing for albuminuria using ACR should be part of the clinical routine at the same level as blood glucose, cholesterolemia, and GFR estimation when these are used to make decisions on CVD risk. 2) Spanish public and private health services should have the necessary means and resources to optimally implement the ESC 2021 guidelines for the prevention of CVD in Spain, including ACR testing.
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Affiliation(s)
- Alberto Ortiz
- Sociedad Española de Nefrología (S.E.N.); Servicio de Nefrología, IIS-Fundación Jiménez Díaz UAM, Madrid, Spain
| | - Borja Quiroga
- Sociedad Española de Nefrología (S.E.N.); Servicio de Nefrología, IIS-La Princesa, Hospital Universitario de la Princesa, Madrid, Spain.
| | - Javier Díez
- Sociedad Española de Nefrología (S.E.N.); Center of Applied Medical Research and School of Medicine, University of Navarra, Pamplona, Spain; Centro de Investigación Biomédica en Red de la Enfermedades Cardiovasculares (CIBERCV), Carlos III Institute of Health, Madrid, Spain
| | | | - Leblic Ramirez
- Servicio de Angiología y Cirugía Vascular, Hospital Universitario de la Paz, Madrid, Spain; Sociedad Española de Angióloga y Cirugía Vascular (SEACV)
| | - Manuel Pérez Maraver
- Servicio de Endocrinología, Hospital Universitari Bellvitge, Barcelona, Spain; Sociedad Española de Diabetes (SED)
| | | | - José Ángel Arranz Arija
- Servicio de Oncología, Hospital General Universitario Gregorio Marañón, Madrid, Spain; Sociedad Española de Oncología Médica (SEOM)
| | | | - Raúl Córdoba
- Servicio de Hematología, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain; Sociedad Española de Hematología y Hemoterapia (SEHH)
| | - Franscisco Brotons Muntó
- Centro de Salud Trinitat, Valencia, Spain; Sociedad Española de Medicina de Familia y Comunitaria (semFYC)
| | - María Jesús Cancelo Hidalgo
- Servicio de Ginecología y Obstetricia, Hospital Universitario de Guadalajara, Universidad de Alcalá, Guadalajara, Spain; Sociedad Española de Ginecología y Obstetricia (SEGO)
| | - Joan Carles Reverter
- Servicio de Hematología, Hospital Clínic, Barcelona, Spain; Sociedad Española de Trombosis y Hemostasia (SETH)
| | | | - Juana Carretera Gómez
- Servicio de Medicina Interna, Hospital Universitario de Badajoz, Badajoz, Spain; Sociedad Española de Medicina Interna (SEMI)
| | - Carlos Guijarro
- Servicio de Medicina Interna, Hospital Universitario Fundación Alcorcón - Universidad Rey Juan-Carlos, Madrid, Spain; Sociedad Española de Arterioesclerosis (SEA)
| | - M Del Mar Freijo Guerrero
- Sociedad Española de Nefrología (S.E.N.); Servicio de Neurología, Hospital de Cruces, Baracaldo, Spain; En representación del Grupo de Estudio de Enfermedades Cerebrovasculares de la Sociedad Española de Neurología
| | - Patricia de Sequera
- Sociedad Española de Nefrología (S.E.N.); Servicio de Nefrología, Hospital Universitario Infanta Leonor, Universidad Complutense De Madrid, Madrid, Spain
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Ortiz A, Quiroga B, Díez J, Martín FJES, Ramirez L, Maraver MP, Lourdes Martínez-Berganza Asensio M, Ángel Arranz Arija J, Luis Alvarez-Ossorio Fernández J, Córdoba R, Muntó FB, Hidalgo MJC, Reverter JC, Plasencia-Rodríguez C, Gómez JC, Guijarro C, del Mar Freijo Guerrero M, Sequera PD. Las Sociedades Científicas españolas ante la guía ESC 2021 de prevención de la enfermedad vascular: generalizar la medida de la albuminuria para identificar el riesgo cardiovascular y prevenir la enfermedad vascular. Nefrologia 2023. [DOI: 10.1016/j.nefro.2023.02.004] [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: 02/25/2023] Open
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Da costa F, Lamot S, Viola L, Noriega-Aguirre L, Corona-Cruz J, Lopes D, Goncalves S, Ramirez L, Reinhold F. EP01.05-004 Trial in Progress: An Observational Study for Management of Lung Nodules across Latin America (DOuBLED Study). J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.305] [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: 10/14/2022]
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Fairchild A, Ramirez L, Adamson J, Floyd S, Moravan M, Fecci P, Yin F, Kirkpatrick J, Torok J. Five-Fraction Stereotactic Radiosurgery (SRS) For Resected Brain Metastases. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.069] [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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Martini G, Borreil IP, Ramirez L, Chicote I, Mancuso F, Caratu G, Serres-Créixams X, Fasani R, Jimenez J, Montañá FR, Argota IB, Ciardiello D, Margalef NM, Dienstmann R, Vivancos A, Elez E, Palmer H, Tabernero J, Martinez GA. 487P Use of patient-derived tumour organoids to identify acquired treatment resistance and determine optimal post-progression combinations in metastatic colorectal cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.598] [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] Open
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Rickmann A, Al-Nawaiseh S, Ramirez L, Röhrig S, Ladewig M, Szurman P, Szurman G. Progressive Makulopathie trotz Absetzen der Chloroquin-Therapie – Multimodale Bildgebung und Review der Literatur. Ophthalmologe 2020; 117:917-925. [DOI: 10.1007/s00347-019-00994-6] [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: 10/25/2022]
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Torres F, Velasquez M, Ramirez L, Leon L, Martinez M. AB1005 BULLOUS LUPUS (BSLE) AS THE FIRST MANIFESTATION OF SYSTEMIC LUPUS ERYTHEMATOSUS IN THE PEDIATRIC POPULATION (PSLE): A DIAGNOSTIC CHALLENGE IN DAILY PRACTICE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.6359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Cutaneous manifestations are observed in 59–85% of patients with SLE but less than 5% developed BSLE. In the GLADEL cohort, the prevalence is 0.41%. BSLE literature in children is scarceObjectives:to describe the clinical characteristics of the patients with BSLEMethods:series of cases between 2010-2019 of two reference centers. The cases met Camisa and Grimwood criteria for BSLEResults:5 cases had bullous lesions that resolved with residual hypopigmentation. One case had focal seizure and other patient had arthritis with leukopenia and thrombocytopenia. 2 patients had proteinuria <500 mg/24 hours. There were no cases of lupus nephritis. The median SLEDAI-2K score was 12 (IR: 8-17). All had ANAs in titers greater than 1:160 and four had anti-DNA (+). 5 patients had anti-RNP and 4 had anti-Sm. One case had anti-Ro/anti-La. All presented low C3 and 80% had low C4. 80% had ESR ≥20 mm/hour and CRP greater than 0.5 mg/dl in 60%. All presented clinical response with glucocorticoids and dapsone; one patient had methemoglobinemia that improved. At 3 months, the blisters did not recur in 4 patients except one case that presented relapse due to inadherence.Histologically, the most common finding was subepidermal blisters with neutrophils in the papilar dermis. DIF showed linear deposits of Igs and complement in 4 cases and granular deposits in one case; IgG/IgM were in 5 of the samples. IgA was positive in 60% and C3 in 80%Conclusion:In this series, BSLE was associated with neuropsychiatric, joint and haematological involvement in 40% of patients, without lupus nephritis. Such abnormalities had a parallel course to skin involvement, without recurrences. BSLE tends to have a single-phase behavior and in children unlike adults, severe renal involvement is uncommonReferences:[1]Pons-Estel GJ, et al. Lupus 2018; 27(10): 1753-1754Disclosure of Interests:None declared
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Echeverri G, Saez J, Escorcia A, Ramirez L. A methodology for the isolation of marine microorganisms tolerant to hexavalent chrome for its bioreduction potential in wastewater. J Biotechnol 2019. [DOI: 10.1016/j.jbiotec.2019.05.177] [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: 10/25/2022]
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Ramirez L, Diaz L, Alshami A, Einav S, Varon J. WHO CAN PERFORM BETTER CPR? CARDIOPULMONARY RESUSCITATION ON TELEVISION MEDICAL DRAMAS: RESULTS OF THE TVMD2 STUDY. Chest 2019. [DOI: 10.1016/j.chest.2019.02.151] [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: 10/27/2022] Open
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Ramirez L, Alshami A, Einav S, Varon J. GENDER DIFFERENCES IN CARDIOPULMONARY RESUSCITATION ON TELEVISION MEDICAL DRAMAS: RESULTS OF THE TVMD2 STUDY. Chest 2019. [DOI: 10.1016/j.chest.2019.02.152] [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: 11/30/2022] Open
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Ramirez L, Carr D, Taylor M. EDUCATIONAL DISCORDANCE FROM PARENTS AND LIFE SATISFACTION AMONG OLDER WHITE, BLACK, AND HISPANIC AMERICANS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Weaver JD, Ramirez L, Sivan S, Di Prima M. Characterizing fretting damage in different test media for cardiovascular device durability testing. J Mech Behav Biomed Mater 2018; 82:338-344. [PMID: 29653383 DOI: 10.1016/j.jmbbm.2018.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 03/09/2018] [Accepted: 04/03/2018] [Indexed: 11/30/2022]
Abstract
In vitro durability tests of cardiovascular devices are often used to evaluate the potential for fretting damage during clinical use. Evaluation of fretting damage is important because severe fretting can concentrate stress and lead to the loss of structural integrity. Most international standards call for the use of phosphate buffered saline (PBS) for such tests although there has been little evidence to date that the use of PBS is appropriate in terms of predicting the amount of fretting damage that would occur in vivo. In order to determine an appropriate test media for in vitro durability tests where fretting damage is being evaluated, we utilized an in vitro test that is relevant to cardiovascular devices both in terms of dimensions and materials (nitinol, cobalt-chromium, and stainless steel) to characterize fretting damage in PBS, deionized water (DIW), and heparinized porcine blood. Overall, tests conducted in blood were found to have increased levels of fretting damage over tests in DIW or PBS, although the magnitude of this difference was smaller than the variability for each test media. Tests conducted in DIW and PBS led to mostly similar amounts of fretting damage with the exception of one material combination where DIW had greatly reduced damage compared to PBS and blood. Differences in fretting damage among materials were also observed with nitinol having less fretting damage than stainless steel or cobalt-chromium. In general, evaluating fretting damage in PBS or DIW may be appropriate although caution should be used when selecting test media and interpreting results given some of the differences observed across different materials.
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Affiliation(s)
- J D Weaver
- Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA.
| | - L Ramirez
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | - S Sivan
- Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA
| | - M Di Prima
- Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USA
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Ramirez L, Dickinson C. Wheelchair users: a guide for the GDP. Br Dent J 2018; 224:408-412. [DOI: 10.1038/sj.bdj.2018.214] [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] [Accepted: 10/02/2017] [Indexed: 11/09/2022]
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Massardo L, Schweitzer F, Pineda C, Pons-Estel B, Cardiel M, Soriano E, Galarza C, Levy R, Sacnum M, Caballero-Uribe C, Bianchi W, Gonzalez H, Montufar R, Pinto R, Ramirez L, Zerbini C, Laurindo I, Barra I. SAT0123 Radiographic Severity of Rheumatoid Arthritis in Latin American Patients: Results from The Gladar Cohort. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5125] [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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Ramirez L, Gentile SR, Zimmermann S, Stoll S. Comparative Study of the Effect of Aluminum Chloride, Sodium Alginate and Chitosan on the Coagulation of Polystyrene Micro-Plastic Particles. ACTA ACUST UNITED AC 2016. [DOI: 10.1166/jcsb.2016.1149] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lowery E, Yong M, Ramirez L, Kliethermes S, Jeffrey S, Kovacs E. Airway Inflammation in the Donor Prior to Explant Increases the Risk of Primary Graft Dysfunction. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.279] [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: 11/17/2022] Open
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Lowery E, Yong M, Ramirez L, Balasubramanian N, Kliethermes S, Schwartz J, Kovacs E. Systemic Inflammatory State of the Organ Donor and Risk for Primary Graft Dysfunction Following Lung Transplantation. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.898] [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: 10/22/2022] Open
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Lalli MA, Bettcher BM, Arcila ML, Garcia G, Guzman C, Madrigal L, Ramirez L, Acosta-Uribe J, Baena A, Wojta KJ, Coppola G, Fitch R, de Both MD, Huentelman MJ, Reiman EM, Brunkow ME, Glusman G, Roach JC, Kao AW, Lopera F, Kosik KS. Whole-genome sequencing suggests a chemokine gene cluster that modifies age at onset in familial Alzheimer's disease. Mol Psychiatry 2015; 20:1294-300. [PMID: 26324103 PMCID: PMC4759097 DOI: 10.1038/mp.2015.131] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/10/2015] [Accepted: 07/23/2015] [Indexed: 12/22/2022]
Abstract
We have sequenced the complete genomes of 72 individuals affected with early-onset familial Alzheimer's disease caused by an autosomal dominant, highly penetrant mutation in the presenilin-1 (PSEN1) gene, and performed genome-wide association testing to identify variants that modify age at onset (AAO) of Alzheimer's disease. Our analysis identified a haplotype of single-nucleotide polymorphisms (SNPs) on chromosome 17 within a chemokine gene cluster associated with delayed onset of mild-cognitive impairment and dementia. Individuals carrying this haplotype had a mean AAO of mild-cognitive impairment at 51.0 ± 5.2 years compared with 41.1 ± 7.4 years for those without these SNPs. This haplotype thus appears to modify Alzheimer's AAO, conferring a large (~10 years) protective effect. The associated locus harbors several chemokines including eotaxin-1 encoded by CCL11, and the haplotype includes a missense polymorphism in this gene. Validating this association, we found plasma eotaxin-1 levels were correlated with disease AAO in an independent cohort from the University of California San Francisco Memory and Aging Center. In this second cohort, the associated haplotype disrupted the typical age-associated increase of eotaxin-1 levels, suggesting a complex regulatory role for this haplotype in the general population. Altogether, these results suggest eotaxin-1 as a novel modifier of Alzheimer's disease AAO and open potential avenues for therapy.
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Affiliation(s)
- M A Lalli
- Neuroscience Research Institute, Department of Molecular, Cellular and Developmental Biology, University of California at Santa Barbara, Santa Barbara, CA, USA
| | - B M Bettcher
- Memory and Aging Center, Department of Neurology, University of California at San Francisco, San Francisco, CA, USA
| | - M L Arcila
- Neuroscience Research Institute, Department of Molecular, Cellular and Developmental Biology, University of California at Santa Barbara, Santa Barbara, CA, USA
| | - G Garcia
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - C Guzman
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - L Madrigal
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - L Ramirez
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - J Acosta-Uribe
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - A Baena
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - K J Wojta
- Departments of Psychiatry and Neurology, Semel Institute for Neuroscience and Human Behavior, University of California at Los Angeles, Los Angeles, CA, USA
| | - G Coppola
- Departments of Psychiatry and Neurology, Semel Institute for Neuroscience and Human Behavior, University of California at Los Angeles, Los Angeles, CA, USA
| | - R Fitch
- Memory and Aging Center, Department of Neurology, University of California at San Francisco, San Francisco, CA, USA
| | - M D de Both
- Neurogenomics Division, The Translational Genomics Research Institute, Phoenix, AZ, USA
| | - M J Huentelman
- Neurogenomics Division, The Translational Genomics Research Institute, Phoenix, AZ, USA
| | - E M Reiman
- Neurogenomics Division, The Translational Genomics Research Institute, Phoenix, AZ, USA
- Banner Alzheimer's Institute, Department of Psychiatry, University of Arizona, Tucson, AZ, USA
| | - M E Brunkow
- Institute for Systems Biology, Seattle, WA, USA
| | - G Glusman
- Institute for Systems Biology, Seattle, WA, USA
| | - J C Roach
- Institute for Systems Biology, Seattle, WA, USA
| | - A W Kao
- Memory and Aging Center, Department of Neurology, University of California at San Francisco, San Francisco, CA, USA
| | - F Lopera
- Grupo de Neurociencias, Universidad de Antioquia, Medellín, Colombia
| | - K S Kosik
- Neuroscience Research Institute, Department of Molecular, Cellular and Developmental Biology, University of California at Santa Barbara, Santa Barbara, CA, USA
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Martorell L, Corrales I, Ramirez L, Parra R, Raya A, Barquinero J, Vidal F. Molecular characterization of ten
F8
splicing mutations in RNA isolated from patient's leucocytes: assessment of
in silico
prediction tools accuracy. Haemophilia 2015; 21:249-257. [DOI: 10.1111/hae.12562] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/13/2014] [Indexed: 01/01/2023]
Affiliation(s)
- L. Martorell
- Gene and Cell Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
- Control of Stem Cell Potency Institute for Bioengineering of Catalonia (IBEC)Barcelona Spain
- Molecular Diagnosis and Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
| | - I. Corrales
- Molecular Diagnosis and Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
- Congenital Coagulopathies Laboratory Blood and Tissue Bank (BST)Barcelona Spain
| | - L. Ramirez
- Molecular Diagnosis and Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
- Congenital Coagulopathies Laboratory Blood and Tissue Bank (BST)Barcelona Spain
| | - R. Parra
- Congenital Coagulopathies Laboratory Blood and Tissue Bank (BST)Barcelona Spain
- Haemophilia Unit Vall d'Hebron University HospitalBarcelona Spain
| | - A. Raya
- Control of Stem Cell Potency Institute for Bioengineering of Catalonia (IBEC)Barcelona Spain
- Catalan Institution for Research and Advanced Studies (ICREA)Barcelona Spain
- Center of Regenerative Medicine in Barcelona (CMRB)Barcelona Spain
- Networking Center of Biomedical Research in Bioengineering Biomaterials and Nanomedicine (CIBER‐BBN) Barcelona Spain
| | - J. Barquinero
- Gene and Cell Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
| | - F. Vidal
- Molecular Diagnosis and Therapy Vall d'Hebron Research Institute Universitat Autònoma de Barcelona (VHIR‐UAB)Barcelona Spain
- Congenital Coagulopathies Laboratory Blood and Tissue Bank (BST)Barcelona Spain
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21
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Meijueiro ML, Santoyo F, Ramirez L, Pisabarro AG. Transcriptome characteristics of filamentous fungi deduced using high-throughput analytical technologies. Brief Funct Genomics 2014; 13:440-50. [DOI: 10.1093/bfgp/elu033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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22
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Ramirez L, Cros J, Marin B, Boulogne P, Bergeron A, de Lafont G, Renon-Carron F, de Vinzelles MA, Guigonis V, Nathan N, Beaulieu P. Analgesic interaction between ondansetron and acetaminophen after tonsillectomy in children: The Paratron randomized, controlled trial. Eur J Pain 2014; 19:661-8. [DOI: 10.1002/ejp.587] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2014] [Indexed: 12/21/2022]
Affiliation(s)
- L. Ramirez
- Department of Anaesthesia; CHU Limoges; France
| | - J. Cros
- Department of Anaesthesia; CHU Limoges; France
| | - B. Marin
- Unité Fonctionnelle de Recherche Clinique et de Biostatistique; CHU Limoges; France
| | - P. Boulogne
- Department of Anaesthesia; CHU Limoges; France
| | - A. Bergeron
- Unité Fonctionnelle de Recherche Clinique et de Biostatistique; CHU Limoges; France
| | - G.E. de Lafont
- Unité Fonctionnelle de Recherche Clinique et de Biostatistique; CHU Limoges; France
| | | | | | - V. Guigonis
- Department of Paediatrics; CHU Limoges; France
| | - N. Nathan
- Department of Anaesthesia; CHU Limoges; France
| | - P. Beaulieu
- Department of Anaesthesia; CHU Limoges; France
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23
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Vilella F, Ramirez L, Berlanga O, Martínez S, Alamá P, Meseguer M, Pellicer A, Simón C. PGE2 and PGF2α concentrations in human endometrial fluid as biomarkers for embryonic implantation. J Clin Endocrinol Metab 2013; 98:4123-32. [PMID: 23979956 DOI: 10.1210/jc.2013-2205] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
BACKGROUND Prostaglandin (PG) signaling has been implicated in embryonic implantation in several animal species including humans; however, this knowledge has not yet been clinically translated. The objective of this work is to investigate whether PGE2 and PGF2α in endometrial fluid (EF) can be used as biomarkers of human embryonic implantation. PATIENTS AND METHODS Lipidomic profile of human EF (n = 173) obtained through natural cycles, hormonal replacement therapy, controlled ovarian stimulation, and refractory endometrium induced by the insertion of an intrauterine device was analyzed by liquid chromatography and tandem mass spectrometry. Immunohistochemistry, Western blotting, immunolocalization of PG receptors on mouse embryos, embryo adhesion assay, pharmacological interventions, and statistical analysis were conducted. RESULTS PGE2 and PGF2α concentrations increased significantly in the human EF during the window of implantation in natural cycles and assisted reproductive technologies patients undergoing in vitro fertilization and ovum donation. This profile was abrogated in the refractory endometrium. We also demonstrated that PGE2 and PGF2α synthases are located in the endometrial epithelium being hormonally regulated during the window of implantation, and PG receptors are expressed in the trophoectoderm and inner cell mass of mouse blastocysts. Using an in vitro model of embryo adhesion, we demonstrated that inhibition of PGE2 and PGF2α or PG receptors (EP2 and FP) prevents embryo adhesion, which can be overcome by adding these molecules back or using their agonists. Finally, in a pilot study, we demonstrated that PGE2 and PGF2α levels from EF 24 hours prior to embryo transfer could predict pregnancy outcome. CONCLUSIONS Our results suggest that PGE2 and PGF2α concentrations 24 hours prior to embryo transfer are potential noninvasive biomarkers of endometrial receptivity.
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Affiliation(s)
- F Vilella
- c/o Catedrático Agustín Escardino, 9. Paterna, Valencia 46980, Spain.
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Salgado M, Alfaro M, Salazar F, Troncoso E, Mitchell RM, Ramirez L, Naguil A, Zamorano P, Collins MT. Effect of soil slope on the appearance of Mycobacterium avium subsp. paratuberculosis in water running off grassland soil after application of contaminated slurry. Appl Environ Microbiol 2013; 79:3544-52. [PMID: 23542616 PMCID: PMC3675930 DOI: 10.1128/aem.00610-13] [Citation(s) in RCA: 18] [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] [Received: 02/25/2013] [Accepted: 03/24/2013] [Indexed: 12/23/2022] Open
Abstract
The study assessed the effect of soil slope on Mycobacterium avium subsp. paratuberculosis transport into rainwater runoff from agricultural soil after application of M. avium subsp. paratuberculosis-contaminated slurry. Under field conditions, 24 plots of undisturbed loamy soil 1 by 2 m(2) were placed on platforms. Twelve plots were used for water runoff: 6 plots at a 3% slope and 6 plots at a 15% slope. Half of the plots of each slope were treated with M. avium subsp. paratuberculosis-contaminated slurry, and half were not treated. Using the same experimental design, 12 plots were established for soil sampling on a monthly basis using the same spiked slurry application and soil slopes. Runoff following natural rainfall was collected and analyzed for M. avium subsp. paratuberculosis, coliforms, and turbidity. M. avium subsp. paratuberculosis was detected in runoff from all plots treated with contaminated slurry and one control plot. A higher slope (15%) increased the likelihood of M. avium subsp. paratuberculosis detection but did not affect the likelihood of finding coliforms. Daily rainfall increased the likelihood that runoff would have coliforms and the coliform concentration, but it decreased the M. avium subsp. paratuberculosis concentration in the runoff. When there was no runoff, rain was associated with increased M. avium subsp. paratuberculosis concentrations. Coliform counts in runoff were related to runoff turbidity. M. avium subsp. paratuberculosis presence/absence, however, was related to turbidity. Study duration decreased bacterial detection and concentration. These findings demonstrate the high likelihood that M. avium subsp. paratuberculosis in slurry spread on pastures will contaminate water runoff, particularly during seasons with high rainfall. M. avium subsp. paratuberculosis contamination of water has potential consequences for both animal and human health.
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Affiliation(s)
- M Salgado
- Biochemistry and Microbiology Department, Faculty of Sciences, Universidad Austral de Chile, Valdivia, Chile.
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25
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Carron A, Samudio M, Laspina F, Fariña N, Sanabria RR, Cibils D, Ramirez L, Carron J, Mino de Kaspar H. [Efficacy of topical 0.3% ciprofloxacin application in reducing the conjunctival biota of patients undergoing cataract extraction]. ACTA ACUST UNITED AC 2013; 88:345-51. [PMID: 23988041 DOI: 10.1016/j.oftal.2013.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 03/01/2012] [Revised: 12/29/2012] [Accepted: 01/08/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To determine the efficacy of topical 0.3% ciprofloxacin in reducing conjunctival biota in patients undergoing cataract surgery. PATIENTS AND METHODS Experimental, prospective, randomized, controlled and single-blind study. Forty-six eyes of 46 patients were randomized into 2 groups, the study group (n=23) received topical 0.3% ciprofloxacin one day before surgery for six times, and on the day of the surgery one drop every 15minutes starting one hour before surgery until 3 doses were completed. The control group (n=23) did not receive any antibiotics. For both groups for the surgical field 10% povidone-iodine was applied. Samples from the conjunctiva were taken at four different times and then cultured on solid media (chocolate agar, blood agar) and enrichment broth (thioglycolate). The aqueous humor samples were also cultured in thioglycolate. The presence of bacteria was identified quantitatively and qualitatively, and the frequency of contamination was measured by considering the presence of bacteria in liquid and solid culture media. The number of colony forming units (CFU) was counted in the solid culture medium. RESULTS Positive cultures were obtained in 82.6% and 78.2% of the patients in the study and control groups, respectively, before the administration of 0.3% ciprofloxacin. The administration of 0.3% ciprofloxacin significantly reduced the CFU compared to the control group (P<.05). Immediately after the use of povidone-iodine, the proportion of patients with a positive culture decreased to 21.7% in the study group, and 8.7% in the control group. At the end of the surgery, this percentage was 26% and 30.4%, respectively. The most common isolated pathogen was negative-coagulase Staphylococcus (66.7%). CONCLUSION The administration of 0.3% ciprofloxacin reduces conjunctival bacterial load in the preoperative period. However, it was unable to eradicate the bacteria completely. The administration of povidone-iodine reduced conjunctival biota in 50%-70% of patients undergoing cataract surgery.
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Affiliation(s)
- A Carron
- National University of Asunción, Asunción, Paraguay
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Urbano M, Dorado J, Ortiz I, Galvez MJ, Demyda-Peyras S, Moreno M, Alcaraz L, Ramirez L, Quesada F, Gonzalez C, Portero JM, Acha D, Hidalgo M. 84 EFFECT OF A STRESSOR ON CANINE SPERM DNA FRAGMENTATION USING THE SPERM CHROMATIN DISPERSION TEST. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Recently, a new procedure for the analysis of sperm DNA fragmentation has been developed for human and different mammalian species (Sperm-Halomax®), based on the sperm chromatin dispersion test (SCDt); however, no studies has been performed specifically on canine frozen–thawed-stressed semen but is there for cooled semen. The aim of this work was to assess the effect of a stressor (24 h in an oven at 38°C) on canine frozen–thawed semen using the SCDt to resemble what happens in the female reproductive tract. For this purpose, ejaculates were collected by digital manipulation from 4 healthy beagle dogs and the sperm-rich fraction of the ejaculates from 3 different dogs was pooled each time. All the pooled semen samples (n = 4) used presented physiological values concerning to routine semen parameters (motility, morphology, and sperm concentration). After evaluation, semen samples were centrifuged and the sperm pellet resuspended to a final concentration of 100 × 106 sperm mL–1 in 2 steps with CaniPRO Freeze (Minitub, Tiefenbach, Germany). Sperm were slowly cooled to 5°C and then loaded into 0.5-mL plastic straws. After that, straws were frozen in liquid-nitrogen vapours for 10 min and stored into a nitrogen tank. Straws were thawed in a water bath (30 s/37°C) and incubated for 24 hours at 38°C before analysis. The sperm DNA fragmentation was assessed in fresh semen and frozen–thawed-stressed samples using the Sperm-Halomax® commercial kit specifically developed for canine semen (Halotech DNA SL, Madrid, Spain) following the manufacturer’s instructions. Slides were stained for green fluorescence staining and 500 sperm per slide were counted using fluorescence microscopy. The sperm DNA fragmentation index (%) was compared between fresh and frozen–thawed-stressed semen samples by ANOVA. Results were expressed as mean ± standard error of the mean. The results obtained showed that subjecting thawed semen to 24 h in an oven at 38°C significantly increased (P < 0.05) DNA fragmentation compared with fresh semen (2.7% ± 0.2 v. 1.4 ± 0.1%). The stress factor was performed to simulate the viability of canine thawed sperm (12–24 h) when a bitch is inseminated with frozen semen. It would be interesting to perform further studies to relate sperm DNA fragmentation and fertility of frozen–thawed canine semen. In conclusion, frozen–thawed-stressed semen samples increased the sperm DNA fragmentation index measured using a SCDt. Further studies are needed to relate sperm DNA fragmentation with fertility rates or cryopreservation success.
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Demyda-Peyrás S, Hidalgo M, Dorado J, De Luca L, Genero E, Ortiz I, Ramirez L, Acha D, Urbano M, Alcaraz L, Galvez MJ, Moreno M. 237 CHROMOSOMAL ABNORMALITIES IN IN VITRO-PRODUCED EARLY BOVINE EMBRYOS: USE OF HOMOLOGOUS FOLLICULAR FLUID SUPPLEMENTATION IN THE OOCYTE MATURATION MEDIA. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Chromosomal abnormalities were described as a possible cause of embryo failures in cattle, even more so when they are in vitro produced. It has been widely demonstrated that the post-fertilization culture environment affects the frequency of blastomeric aneuploidies. However, the literature concerning the effect of the oocyte maturation techniques on in vitro-produced embryos is scarce. The aim of this study was to determine the effect of homologous bovine follicular fluid (BFF) as a possible replacement for commercial sera in the appearance of chromosomal abnormalities on early IVF-produced embryos. Cumulus–oocyte complexes obtained from ovarian puncture were maturated in modified bicarbonate-buffered TCM-199 media, supplemented with glutamine, sodium pyruvate, FSH, LH, oestradiol, and gentamicin in three different groups. Two treatments were performed: 1) base media supplemented with BFF, obtained aseptically from follicles between 4 and 10 mm in diameter (10 and 20%), and 2) a control group, with base media supplemented with 10% FCS without BFF. After 20 h of culture at 38.5°C in a 5% CO2 humid atmosphere, cumulus–oocyte complexes from both treatments were fertilized in IVF media and then cultured for 72 h in SOF media, according to our laboratory techniques. A total of 152 early embryos were cytogenetically evaluated following our standard laboratory techniques. Developed embryos were individually fixed onto a slide, disaggregated into blastomeres with acetic acid, and stained with Giemsa solution. Chromosomal numerical abnormalities were evaluated in each embryo by direct observation at 1250× magnification using a bright field microscope. Results were statistically compared among treatments by the expected proportion test. No significant differences (P > 0.05) were found between different culture media on the percentages of normal diploid embryos or each kind of numerical abnormality. According to our results (Table 1), the use of homologous follicular fluid as a supplement on the oocyte maturation media did not influence the appearance of abnormal complements in the embryos produced compared with the use of FCS. In conclusion, homologous follicular fluid may be considered a valid serum replacement in the maturation media on IVF-produced bovine embryos.
Table 1.Analysis of chromosomal complements of Day 3 in vitro-produced bovine embryos derived from oocytes maturated in culture media with different serum supplementation1
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Ortiz I, Dorado J, Acha D, Ramirez L, Urbano M, Galvez MJ, Alcaraz L, Portero JM, Quesada F, Gonzalez C, Demyda-Peyras S, Hidalgo M. 72 EFFECT OF SINGLE-LAYER CENTRIFUGATION WITH EQUIPURE™ ON MOTILITY KINEMATICS OF FROZEN - THAWED DONKEY SPERM. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab72] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Single-layer centrifugation (SLC) with EquipureTM Bottom Layer has been used to enhance the quality of stallion semen samples; however, no studies have been performed on donkeys. The aim of this study was to determine if SLC with EquipureTM Bottom Layer improves kinematic parameters on frozen–thawed donkey sperm. Semen was collected from 4 Andalusian donkeys by artificial vagina. Three ejaculates from each donkey were centrifuged with EquiproTM, supernatant was removed, and pellet was re-extended in the freezing medium GentTM to a final concentration of 200 × 106 spermatozoa per milliliter. Sperm were slowly cooled to 5°C for 2 h, loaded in 0.5-mL plastic straws, and frozen in liquid-nitrogen vapors. After at least one week of storage, straws were thawed in a water bath at 37°C for 30 s. After thawing, semen samples were divided in 2 aliquots: aliquot 1 was used as such (control) and aliquot 2 was processed by SLC using EquipureTM Bottom Layer. Computer-assisted sperm analysis was performed, and sperm kinematics total motility (%), progressive motility (%), curvilinear velocity (VCL; µm s–1), velocity straight line (VSL; µm s–1), velocity average path (VAP; µm s–1), linearity (LIN; %), straightness (STR; %), wobble (WOB; %), lateral head displacement (ALH; µm), and beat cross frequency (BCF; Hz) were statistically compared using GLM model between frozen–thawed semen samples processed or not with EquipureTM. Results were expressed as mean ± standard error. Significant differences (P < 0.05) were found between SLC-selected and unselected semen for total motility (77.44 ± 5.83 v. 58.89 ± 6.07), progressive motility (76.88 ± 4.52 v. 56.59 ± 5.44), VCL (137.50 ± 0.75 v. 133.0 ± 0.99), LIN (69.43 ± 0.31 v. 68.23 ± 0.41), STR (78.45 ± 0.29 v. 76.90 ± 0.37), WOB (85.06 ± 0.18 v. 83.91 ± 0.26), ALH (2.76 ± 0.01 v. 2.44 ± 0.01), and BCF (9.13 ± 0.05 v. 8.53 ± 0.06), respectively. No significant differences were observed for VSL (102.89 ± 0.70 v. 104.32 ± 0.95) and VAP (123.21 ± 0.71 v. 121.50 ± 0.98). Most of the computer-assisted sperm analysis parameters used in the present study have been previously identified as reliable markers of sperm motility in relation to sperm quality and fertility. It has also been reported that VCL appears to be critical for the formation of the sperm reservoir and penetration of the zona pellucida. In addition, other variables improved in the SLC-selected samples have been described as measure of progressivity (LIN, STR) and spermatozoa vigor (BCF, ALH). These preliminary results suggest an additional option for improving sperm quality in donkey semen doses. In conclusion, SLC with EquipureTM can be used to enhance kinematic parameters on frozen–thawed donkey sperm.
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Alcaráz L, Hidalgo M, Galvez MJ, Acha D, Ortiz I, Demyda-Peyrás S, Gonzales C, Portero J, Quesada F, Ramirez L, Dorado J. Erratum to: 56 SINGLE LAYER CENTRIFUGATION THROUGH PURESPERM® 80 IMPROVES QUALITY OF CRYOPRESERVED DOG SPERMATOZOA. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab56_er] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Density gradient centrifugation with PureSperm® (PureSperm® 40+PureSperm® 80; Nidacon International, Mölndal, Sweden) has been satisfactorily used to enhance the quality of dog semen samples; however, no studies have been performed on the effect of single layer centrifugation (SLC) with PureSperm® on frozen–thawed dog semen. The aim of this study was to investigate if SLC with PureSperm® 80 can improve the post-thaw semen quality of dog. Semen from 5 dogs was collected by digital manipulation. Two ejaculates from each dog were centrifuged with Tris-based extender, supernatant was removed, and sperm pellet was suspended to a final concentration of 300–400×106spermmL–1 with CaniPROTM Freeze A plus 20% egg yolk at 22°C. Extended semen was cooled to 5°C within an hour and then diluted to a final concentration of 150–200×106spermmL–1 in CaniPROTM Freeze B plus 20% egg yolk at 5°C, loaded in 0.5-mL plastic straws and frozen horizontally in ranks placed 4cm above the surface of liquid nitrogen vapors for 10min, after which they were directly placed in liquid nitrogen. After 24 to 48h of storage, straws were thawed in a water bath at 37°C for 30s. After thawing, semen samples were divided in 2 aliquots: one of them was used as control and the other one was processed by SLC PureSperm® 80. Assessment of sperm motility (assessed by computerized-assisted semen analysis), morphology (Diff-Quick staining), and viability [triple fluorescent stain of propidium iodine/isothiocyanate-labeled peanut (Arachis hypogaea) agglutinin/Rhodamine 123] were evaluated in control and treated semen samples. Data were studied by ANOVA. Results are expressed as mean ± SEM. Significant (P<0.001) differences were found between SLC-treated and control semen for sperm motility (percentage of total motile spermatozoa: 93.65±0.05 v. 83.79±0.13; percentage of progressive motile spermatozoa: 79.38±6.66 v. 54.61±16.11), morphology (86.45±0.01 v. 83.51±0.01), and viability (percentage of viable sperm with an intact acrosome: 58.32±0.04 v. 36.50±0.17; percentage of viable sperm with an acrosome reaction: 2.81±0.01 v. 9.74±0.21). Based on our results, we can conclude that SLC with PureSperm® 80 is an alternative and successful method for improving the quality of frozen–thawed dog spermatozoa, selecting good-quality spermatozoa (motile, morphologically normal, viable, and acrosome intact spermatozoa) from the rest of the semen sample.
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Qeusada F, Dorado J, Acha D, Ortiz I, Urbano M, Ramirez L, Galvez MJ, Alcaraz L, Portero JM, Gonzalez C, Demyda-Peyras S, Hidalgo M. 14 FREEZING OF DONKEY SEMEN AFTER 24 HOURS OF COOL STORAGE: PRELIMINARY RESULTS. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Several studies on sperm cooling and cryopreservation have been done in horses; however, only a few them have been developed in donkeys. In addition, no studies have been performed to freeze cooled stored donkey semen. Therefore, the aim of this study was to determine if it is possible to freeze donkey sperm after 24 h of cool storage. Semen was collected from 4 Andalusian donkeys by artificial vagina. After collection, each sample was separated into 2 aliquots; one of them was immediately frozen (t0) and the other one was cooled and stored before freezing (t24). The cryopreservation procedure consisted of a previous dilution of semen with EquiPro™. After that, semen was centrifuged and the sperm pellet resuspended with Gent® extender plus ethylene glycol (4%) to achieve a final concentration of 100 × 106 sperm mL–1. Sperm was slowly cooled to 5°C, loaded in 0.5-mL plastic straws and frozen in LN vapours. The second aliquot (t24) was diluted with Gent® extender to a final concentration of 50 × 106 sperm mL–1 and then cooled and stored at 5°C for 24 h. After that, cooled semen samples were cryopreserved following the same procedure as described above. Straws were thawed in a water bath at 37° for 30 s. Computer-assisted sperm motility analysis was performed. Total motility (TM), progressive motility (PM), and the following kinematic parameters: velocity curvilinear (VCL; µm s–1), velocity straight line (VSL; µm s–1), velocity average path (VAP; µm s–1), linearity (LIN; %), straightness (STR; %), wobble (WOB; %), amplitude of lateral head displacement (ALH; µm), and beat cross frequency (BCF; Hz) were compared between treatments by ANOVA. Results were expressed as mean ± standard error. Significant differences (P < 0.05) were found between treatments (t0 v. t24) for TM (63.76 ± 4.75 v. 51.67 ± 3.69), PM (36.01 ± 3.19 v. 27.24 ± 2.72), VCL (77.29 ± 0.65 v. 67.56 ± 0.78), VSL (58.50 ± 0.61 v. 52.11 ± 0.76), VAP (67.82 ± 0.64 v. 59.41 ± 0.79), LIN (57.90 ± 0.33 v. 59.53 ± 0.32), STR (70.39 ± 0.30 v. 72.43 ± 0.41), WOB (75.64 ± 0.22 v. 75.48 ± 0.32), ALH (1.88 ± 0.09 v. 1.69 ± 0.10), and BCF (6.28 ± 0.04 v. 6.51 ± 0.06). These preliminary results showed significant differences between cryopreservation at 0 and 24 h post-cooling; however, understanding that direct freezing is better in terms of sperm motility, cryopreservation of cooled stored semen could still be considered good according to the values obtained for sperm motility parameters after thawing. In our opinion, sperm centrifugation before cooling probably improve the results of cryopreservation 24 h post-cooling, due to the negative effect of seminal plasma on sperm viability during storage. In addition, the analysis of other sperm parameters would be useful to check more accurately differences between treatments. In conclusion, sperm motility parameters were higher in donkey semen samples immediately frozen after collection in comparison to semen samples cryopreserved after 24 h of cooling storage. Further studies are needed to improve cooling and cryopreservation procedures for freezing cooled stored donkey semen.
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Alcaráz L, Hidalgo M, Galvez MJ, Acha D, Ortiz I, Demyda-Peyrás S, Gonzales C, Portero J, Quesada F, Ramirez L, Dorado J. Erratum to: 56 SINGLE LAYER CENTRIFUGATION THROUGH PURESPERM® 80 IMPROVES QUALITY OF CRYOPRESERVED DOG SPERMATOZOA. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Density gradient centrifugation with PureSperm® (PureSperm® 40 + PureSperm® 80; Nidacon International, Mölndal, Sweden) has been satisfactorily used to enhance the quality of dog semen samples; however, no studies have been performed on the effect of single layer centrifugation (SLC) with PureSperm® on frozen–thawed dog semen. The aim of this study was to investigate if SLC with PureSperm® 80 can improve the post-thaw semen quality of dog. Semen from 5 dogs was collected by digital manipulation. Two ejaculates from each dog were centrifuged with Tris-based extender, supernatant was removed, and sperm pellet was suspended to a final concentration of 300–400 × 106 sperm mL–1 with CaniPROTM Freeze A plus 20% egg yolk at 22°C. Extended semen was cooled to 5°C within an hour and then diluted to a final concentration of 150–200 × 106 sperm mL–1 in CaniPROTM Freeze B plus 20% egg yolk at 5°C, loaded in 0.5-mL plastic straws and frozen horizontally in ranks placed 4 cm above the surface of liquid nitrogen vapors for 10 min, after which they were directly placed in liquid nitrogen. After 24 to 48 h of storage, straws were thawed in a water bath at 37°C for 30 s. After thawing, semen samples were divided in 2 aliquots: one of them was used as control and the other one was processed by SLC PureSperm® 80. Assessment of sperm motility (assessed by computerized-assisted semen analysis), morphology (Diff-Quick staining), and viability [triple fluorescent stain of propidium iodine/isothiocyanate-labeled peanut (Arachis hypogaea) agglutinin/Rhodamine 123] were evaluated in control and treated semen samples. Data were studied by ANOVA. Results are expressed as mean ± SEM. Significant (P < 0.001) differences were found between SLC-treated and control semen for sperm motility (percentage of total motile spermatozoa: 93.65 ± 0.05 v. 83.79 ± 0.13; percentage of progressive motile spermatozoa: 79.38 ± 6.66 v. 54.61 ± 16.11), morphology (86.45 ± 0.01 v. 83.51 ± 0.01), and viability (percentage of viable sperm with an intact acrosome: 58.32 ± 0.04 v. 36.50 ± 0.17; percentage of viable sperm with an acrosome reaction: 2.81 ± 0.01 v. 9.74 ± 0.21). Based on our results, we can conclude that SLC with PureSperm® 80 is an alternative and successful method for improving the quality of frozen–thawed dog spermatozoa, selecting good-quality spermatozoa (motile, morphologically normal, viable, and acrosome intact spermatozoa) from the rest of the semen sample.
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Tebas P, Ramirez L, Morrow MP, Yan J, Shah D, Lee J, Weiner DB, Boyer J, Bagarazzi M, Sardesai NY. Potent cellular immune responses after therapeutic immunization of HIV-positive patients with the PENNVAX®-B DNA vaccine in a Phase I Trial. Retrovirology 2012. [PMCID: PMC3441269 DOI: 10.1186/1742-4690-9-s2-p276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Levine MN, Gu C, Liebman HA, Escalante CP, Solymoss S, Deitchman D, Ramirez L, Julian J. A randomized phase II trial of apixaban for the prevention of thromboembolism in patients with metastatic cancer. J Thromb Haemost 2012; 10:807-14. [PMID: 22409262 DOI: 10.1111/j.1538-7836.2012.04693.x] [Citation(s) in RCA: 150] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Cancer patients receiving chemotherapy are at increased risk for thrombosis. Apixaban, a factor Xa inhibitor, is oral and does not require laboratory monitoring. OBJECTIVES A pilot study was conducted to evaluate whether apixaban would be well tolerated and acceptable in cancer patients receiving chemotherapy. PATIENTS/METHODS Subjects receiving either first-line or second-line chemotherapy for advanced or metastatic lung, breast, gastrointestinal, bladder, ovarian or prostate cancers, cancer of unknown origin, myeloma or selected lymphomas were randomized to 5 mg, 10 mg or 20 mg once daily of apixaban or placebo in a double-blind manner for 12 weeks. Use of the study drug began within 4 weeks of the start of chemotherapy. The primary outcome was either major bleeding or clinically relevant non-major (CRNM) bleeding. Secondary outcomes included venous thromboembolism (VTE) and grade III or higher adverse events related to the study drug. Thirty-two patients received 5 mg, 30 patients 10 mg, 33 patients 20 mg, and 30 patients placebo. In these groups, there were 0, 0, 2 and 1 major bleeds, respectively. The corresponding data for CRNM bleeds were 1, 1, 2, and 0. The rate of major bleeding in the 93 apixaban patients was 2.2% (95% confidence interval 0.26-7.5%). There were no fatal bleeds. Three placebo patients had symptomatic VTE. CONCLUSIONS Apixaban was well tolerated in our study population. These results support further study of apixaban in phase III trials to prevent VTE in cancer patients receiving chemotherapy.
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Affiliation(s)
- M N Levine
- Department of Oncology, McMaster University and Ontario Clinical Oncology Group, Hamilton, Ontario, Canada.
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Davis C, Flint D, Pelletiere K, Lowery E, Ramirez L, Love R, Kovacs E, Fisichella P. 721 Pepsin Concentrations Are Elevated in the Bronchoalveolar Lavage Fluid of Patients with Idiopathic Pulmonary Fibrosis after Lung Transplantation. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Fisichella P, Davis C, Pittman M, Ramirez L, Lowery E, Gagermeier J, Love R, Kovacs E. Pulmonary Immune Changes Early After Laparoscopic Antireflux Surgery in Lung Transplant Patients with Gastroesophageal Reflux Disease. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.792] [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: 10/14/2022]
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Vilella F, Ramirez L, Berlanga O, Martinez S, Pellicer A, Simon C. Effects of PGE2 and PGF2α on blastocyst adhesion to the human endometrial epithelium. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.259] [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: 10/17/2022]
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Cruz A, Ramirez L. P3-S6.10 Analysis of systemic and cutaneous immune responses helps explain the duality of immune evasion and recognition in secondary syphilis. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.483] [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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Levine MN, Deitchman D, Julian J, Liebman H, Escalante C, O'Brien MC, Ramirez L, Weise-Kelly L, Solymoss S. A randomized phase II trial of a new anticoagulant, apixaban, in metastatic cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e20514] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e20514 Background: Cancer patients receiving chemotherapy, biologic, and molecular targeted therapies are at increased risk of venous thromboembolism (VTE). Currently available anticoagulants (ACs) are not well suited to prevent VTE in such patients. Vitamin K antagonist oral ACs require frequent lab monitoring and low molecular weight heparins require daily subcutaneous injection. There is concern for bleeding with ACs. Apixaban (A) is a new antithrombotic agent which inhibits activated coagulation Factor X, is taken orally, and does not require lab monitoring. Trials to prevent post-operative VTE in orthopedic surgery showed that A was effective and safe. We wanted to assess the feasibility of A in cancer. Methods: In a randomized phase II trial, patients with metastatic cancer on 1st or 2nd line chemotherapy received study drug once daily for 12 weeks; either 5, 10 or 20 mg of A, or placebo. The primary outcome measure was the proportion of patients remaining free of major bleeding (MB), clinically relevant non-major bleeding (CRNMB), VTE, and grade ≥3 adverse events considered to be probably/definitely related to study drug (AE*). After 125 patients were recruited, the sponsor eliminated further randomization to the 10 and 20 mg arms, to add experience with the 5 mg dose currently under evaluation for VTE prevention in other conditions. Data on the first 125 patients are reported. Results: The study population was 50% male; 88% had ECOG performance status 0 or 1. The most common cancers were breast, colon, pancreas, and myeloma. 23% had liver metastases. Approximately 80% of A patients completed 12 weeks of treatment. The numbers of patients with events were: Conclusions: Apixiban was well tolerated in patients with advanced cancer on chemotherapy. Major bleeding, thrombosis, and drug-related SAEs were very low. These results support further study of A in phase III trials for VTE prevention in cancer patients. [Table: see text] [Table: see text]
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Affiliation(s)
- M. N. Levine
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - D. Deitchman
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - J. Julian
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - H. Liebman
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - C. Escalante
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - M. C. O'Brien
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - L. Ramirez
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - L. Weise-Kelly
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
| | - S. Solymoss
- McMaster University, Hamilton, ON, Canada; Bristol-Myers Squibb, Lawrenceville, NJ; USC-Keck School of Medicine, Los Angeles, CA; M. D. Anderson Cancer Center, Houston, TX; Montreal General Hospital, Montreal, QC, Canada
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Carter M, Zhu F, Kotanko P, Kuhlmann M, Ramirez L, Heymsfield SB, Handelman G, Levin NW. Assessment of body composition in dialysis patients by arm bioimpedance compared to MRI and 40K measurements. Blood Purif 2009; 27:330-7. [PMID: 19270452 DOI: 10.1159/000207200] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Accepted: 11/04/2008] [Indexed: 01/21/2023]
Abstract
This study used multi-frequency bioimpedance spectroscopy (BIS) of the arm and whole body to estimate muscle mass (MM) and subcutaneous adipose tissue (SAT) in 31 hemodialysis (HD) patients comparing these results with magnetic resonance imaging (MRI) and body potassium ((40)K) as gold standards. Total body and arm MM (MM(MRI)) and SAT (SAT(MRI)) were measured by MRI. All measurements were made before dialysis treatment. Regression models with the arm (aBIS) and whole body (wBIS) resistances were established. Correlations between gold standards and the BIS model were high for the arm SAT (r(2) = 0.93, standard error of estimate (SEE) = 3.6 kg), and whole body SAT (r(2) = 0.92, SEE = 3.5 kg), and for arm MM (r(2) = 0.84, SEE = 2.28 kg) and whole body MM (r(2) = 0.86, SEE = 2.28 kg). Total body MM and SAT can be accurately predicted by arm BIS models with advantages of convenience and portability, and it should be useful to assess nutritional status in HD patients.
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Affiliation(s)
- M Carter
- Renal Research Institute, Yorkville Dialysis Center, 1555 3rd Avenue #218, New York, NY 10128, USA
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Pisabarro AG, Perez G, Lavin JL, Ramirez L. Genetic networks for the functional study of genomes. Briefings in Functional Genomics and Proteomics 2008; 7:249-63. [DOI: 10.1093/bfgp/eln026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Llanos-Cuentas A, Tulliano G, Araujo-Castillo R, Miranda-Verastegui C, Santamaria-Castrellon G, Ramirez L, Lazo M, De Doncker S, Boelaert M, Robays J, Dujardin JC, Arevalo J, Chappuis F. Clinical and Parasite Species Risk Factors for Pentavalent Antimonial Treatment Failure in Cutaneous Leishmaniasis in Peru. Clin Infect Dis 2008; 46:223-31. [DOI: 10.1086/524042] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Ramirez L, Durdle NG, Raso VJ. A machine learning approach to assess changes in scoliosis. Stud Health Technol Inform 2008; 140:254-259. [PMID: 18810033] [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: 05/26/2023]
Abstract
This paper presents a machine learning approach that can be used to evaluate the validity of the results obtained with an automated system to measure changes in scoliotic curves. The automated system was used to measure the inclinations of 141 vertebral endplates in spine radiographs of patients with scoliosis. The resulting dataset was divided into training and test set. The training set was used to configure three classifiers: a support vector classifier (SVC), a decision tree classifier (DT) and a logistic regression classifier (LR). Their performance was evaluated on the test set. The SVC had an accuracy of 86% discriminating Good Results (those in which the error was less than 3 degrees ) from Bad Results. This accuracy was better than that of the LR (76%) and DT (68%). The differentiation between Good and Bad Results using the proposed machine learning approach was achieved successfully.
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Affiliation(s)
- L Ramirez
- Department of Electrical and Computer Engineering, University of Alberta, Canada
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Guarnizo-Zuccardi P, Lopez Y, Giraldo M, Garcia N, Rodriguez L, Ramirez L, Uribe O, Garcia L, Vasquez G. Cytokine gene polymorphisms in Colombian patients with systemic lupus erythematosus. ACTA ACUST UNITED AC 2007; 70:376-82. [PMID: 17711410 DOI: 10.1111/j.1399-0039.2007.00917.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [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: 02/03/2023]
Abstract
Systemic lupus erythematosus (SLE) patients exhibit alterations in cytokine production that may be relevant to SLE pathogenesis. There is evidence that cytokine gene polymorphisms control cytokine production; thus, these polymorphisms may be associated with SLE or its clinical manifestations. To establish the association of tumor necrosis factor alpha (TNF-alpha), transforming growth factor (TGF) beta1, interleukin (IL)-10, and IL-6 gene polymorphisms in Colombian SLE patients and their clinical manifestations, 120 SLE patients and 102 healthy controls were studied. Single nucleotide polymorphisms were studied by sequence-specific primers polymerase chain reaction (SSP-PCR) at: TNFalpha-308 (G/A), TGFbeta1 codon 10 (C/T) and codon 25 (G/C), IL-10 -1082 (G/A), -819 (C/T) and -592 (C/A), and IL-6 + 174 (G/C). Human leukocyte antigen (HLA)-DRbeta1 was typed by SSP-PCR. SLE patients had increased frequency of allele C at TGFbeta1 codon 25 (P = 0.0001, odds ratio (OR): 4.25, 95% confidence interval (CI): 2.17-8.35) and allele A at TNFalpha-308 (P = 0.0004 OR: 3.9, 95% CI: 1.65-5.80) compared with healthy controls. There was higher frequency of GC genotype at TGFbeta1 codon 25 in SLE patients (P < 0.0001). Extended genotypic analysis showed that SLE patients have decreased frequency of TNFalphaLow/TGFbeta1High (0.50) compared with healthy controls (0.80) (P < 0.0001). No association was found between these polymorphisms and SLE clinical manifestations except for Sm and Ro autoantibodies that were associated with TNFalpha allele A. There is an association between TNFalpha-308A/TGFbeta1 codon 25C with SLE susceptibility in Colombian population. This association may result in a highly inflammatory response with a decrease regulatory function mediated by TNFalpha and TGFbeta1, respectively. The TNFalpha-308A/TGFbeta1 25C genotype may be one component of genetic susceptibility to SLE in Colombian population.
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Affiliation(s)
- P Guarnizo-Zuccardi
- Grupo de Immunología Celular e Inmunogenética, Universidad de Antioquia, Medellin, Colombia
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Hunter AD, Zeller M, Wagner TR, Bond M, Butcher RJ, Crundwell G, Ferrence GM, Kantardjieff K, Ramirez L, Higgins T, Szalay P. The STaRBURSTT – CyberInstrumentation Consortium – CyberEnabled crystallographic education. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306097637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Ramirez L, Durdle NG, Raso VJ. Automatic matching of spine images to assess changes in scoliosis. Stud Health Technol Inform 2006; 123:218-22. [PMID: 17108430] [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: 05/12/2023]
Abstract
This paper presents an image matching approach that can be used to measure changes in scoliotic curves. The proposed approach uses a novel fuzzy logic controller to estimate all open parameters. Using fluoroscopy images of a spine phantom, it was found that, with minimal user interaction, the matching of spine images could be achieved with high accuracy (the average errors were around 0.03 mm) and high computational efficiency (requiring less than 1 minute for matching each vertebra).
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Affiliation(s)
- L Ramirez
- Department of Electrical and Computer Engineering, University of Alberta, Canada
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Ramirez L, Durdle NG, Raso VJ. Evaluating similarity metrics in an image matching tool for image guided spine surgery. Stud Health Technol Inform 2006; 123:549-51. [PMID: 17108485] [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: 05/12/2023]
Abstract
This paper presents a comparison study of the effect of three similarity measures (mutual information, normalized mutual information, and mean squared error on the edges of the input image) in an image matching tool that can be used in image guided spine surgery. Using 3D rotational x-rays and magnetic resonance images of a spine phantom, it was found that the similarity measures had similar effect. Therefore, experiments with other datasets are needed before making conclusions about the suitability of these similarity metrics for image guided surgery.
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Affiliation(s)
- L Ramirez
- Department of Electrical and Computer Engineering, University of Alberta, Canada
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Shekelle P, Hardy ML, Coulter I, Udani J, Spar M, Oda K, Jungvig LK, Tu W, Suttorp MJ, Valentine D, Ramirez L, Shanman R, Newberry SJ. Effect of the supplemental use of antioxidants vitamin C, vitamin E, and coenzyme Q10 for the prevention and treatment of cancer. Evid Rep Technol Assess (Summ) 2003:1-3. [PMID: 15523748 PMCID: PMC4781200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
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Halpern A, Mancini MC, Suplicy H, Zanella MT, Repetto G, Gross J, Jadzinsky M, Barranco J, Aschner P, Ramirez L, Matos AG. Latin-American trial of orlistat for weight loss and improvement in glycaemic profile in obese diabetic patients. Diabetes Obes Metab 2003; 5:180-8. [PMID: 12681025 DOI: 10.1046/j.1463-1326.2003.00262.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [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: 11/20/2022]
Abstract
AIM To determine if obese non-insulin-dependent diabetic patients lose more weight when treated for 24 weeks (6 months) with orlistat (120 mg t.i.d.), in conjunction with a hypocaloric diet plus behavioural counselling, than when treated by placebo (t.i.d.) plus similar instructions. The secondary objectives were to evaluate the effects on glucose profile and to determine the tolerability and safety of orlistat. DESIGN Double-blind, parallel, randomized, placebo-controlled, multicentre study. SUBJECTS Obese, non-insulin-dependent diabetic patients, aged 18-70 years old, with BMI > 27 kg/m2, evaluated at 10 Latin-American centres, in five countries. EFFICACY AND TOLERABILITY MEASUREMENTS: After screened, eligible patients passed by a 2-week placebo run-in period receiving a hypocaloric diet. On day 0, patients were randomized to orlistat or placebo for 24 weeks. At each visit, body weight, blood pressure and waist circumference were measured. At the screening visit, baseline visit (week 0), and at weeks 8, 16 and 24, a central laboratory was in charge of measuring fasting glucose and insulin, HbA1c, postprandial glucose and insulin, fasting total cholesterol, HDL-cholesterol, LDL-cholesterol, triglycerides, and postprandial triglycerides. Other safety laboratory assessments were measured locally at the screening visit, baseline visit and at the end of the study. Adverse events were assessed at each visit from baseline. RESULTS After 24 weeks of treatment, the orlistat group lost an average of 4.7% of initial body weight vs. 3.0% in the placebo group (p = 0.0003). A greater weight loss was achieved in the orlistat compared with the placebo group (4.24 +/- 0.23 vs. 2.58 +/- 1.46 kg, p = 0.0003). Almost twice as many patients receiving orlistat (30% vs. 17%) lost > or = 5% of initial body weight (p = 0.003). Orlistat treatment plus diet compared to placebo plus diet was associated with significant improvement in glycaemic control, as reflected in decreases in HbA1c (p = 0.04), fasting plasma glucose (p = 0.036) and postprandial glucose (p = 0.05). Orlistat-treated patients had a mean decrease in glucose levels of 1.00 +/- 0.34 mmol/l [3.7%] vs. 0.01 +/- 0.30 mmol/l for placebo group, at week 24 and an absolute decrease of HbA1c of 0.61 +/- 0.15 vs. a decrease of 0.22 +/- 0.14% in the placebo group. Orlistat therapy also resulted in significantly greater improvements than placebo in lipid profile, with reductions in total cholesterol (p = 0.0001) and LDL-cholesterol (p = 0.002). Mild to moderate transient gastrointestinal events were reported, mainly with orlistat treatment, but their association with withdrawal from the study was low. CONCLUSION Orlistat is a useful and an effective therapy in obese diabetic patients, promoting clinically significant weight loss and improved glycaemic control and lipid profile.
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Affiliation(s)
- A Halpern
- Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, Brazil.
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Canale R, Barone RJ, Gimenez NS, Santopietro M, Ramirez L, Palliotti A, Romero P, Amado D. Adequacy and nutrition in the absence of residual renal function in peritoneal dialysis. Adv Perit Dial 2002; 17:230-4. [PMID: 11510282] [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: 02/21/2023]
Abstract
With the aim of evaluating nutrition indices and dialysis adequacy level in patients who started peritoneal dialysis (PD) without residual renal function, we retrospectively studied 19 patients [8 men, 11 women; 3 with diabetes (15.8%); mean age: 44.5 +/- 10.74 years; 15 on continuous ambulatory peritoneal dialysis (CAPD), 3 on continuous cycling peritoneal dialysis (CCPD), 1 on nightly intermittent peritoneal dialysis (NIPD)]. The mean time spent by these patients on hemodialysis before PD was 62.7 +/- 54.7 months (range: 8.8-216 months), and the mean time on PD was 46.2 +/- 21.4 months (range: 10-75 months). In these patients, we measured weekly Kt/V urea, weekly creatinine clearance (CrC), normalized protein catabolic rate (nPCR), body surface area (BSA), urea distribution volume (V), serum albumin, body mass index (BMI), percent lean body mass (%LBM), infusion volume (liters per day), subjective global assessment (SGA), and peritoneal equilibration test (PET). Using the Student t-test at a significance level of p < 0.05, we compared initial body weight (INW), actual weight (AW), and ideal body weight (IBW) according to age, sex, and height. We analyzed actuarial and technique survival (Kaplan-Meier). In regard to patient survival, only death was considered the end point; for technique survival, only technique failure was considered the end point. Data are expressed as mean +/- standard deviation. Results were: Kt/V, 2.20 +/- 0.46 L weekly; CrC, 59.11 +/- 12 L weekly; nPCR, 1.08 +/- 0.25 g/kg daily; BSA, 1.67 +/- 0.2 m2; V, 33.34 +/- 7.12; serum albumin, 3.68 +/- 0.22 g/dL; BMI, 24.06 +/- 4.16; %LBM, 64.92 +/- 10.13; SGA, 94.7% well-nourished; AW, 65.37 +/- 13.88 kg; IBW, 67.21 +/- 10.5 kg (AW vs IBW: r = 0.69, p > 0.05); INW, 61.54 +/- 11.07 kg (INW vs AW: r = 0.92, p < 0.05; INW vs IBW: r = 0.71, p < 0.05). Distribution of transport status by PET was 15.8% high transport, 36.8% high-average transport, 36.8% low-average transport, and 10.5% low transport. Mean infusion volume was 10.41 +/- 1.36 L in 24 hours. Cumulative survival was 100%, 98%, and 82% after 1, 2, and 6 years respectively. Technique survival was 100% after 6 years. The adequacy results accord with Dialysis Outcomes Quality Initiative (DOQI) recommendations, and the nutrition indices and actuarial and technique survival are satisfactory for anuric patients.
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Affiliation(s)
- R Canale
- Servicio de Terapia Renal Hurlingham SRL, Centro Integral de Diálisis, Hospital Israelita, Buenos Aires, Argentina
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