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Ubeda C, Vano E, Perez MD, Jímenez P, Ramirez R, Nader A, Miranda P, Azcurra P, Damsky J, Capdevila S, Oliveira M, Albuquerque J, Bocamino R, Schelin H, Yagui A, Aguirre D, Riquelme N, Cardenas L, Álvarez A, Mosquera W, Arias F, Gutierrez R, De la Mora R, Rivera T, Zapata J, Araujo P, Chiesa P. Setting up regional diagnostic reference levels for pediatric interventional cardiology in Latin America and the Caribbean countries: preliminary results and identified challenges. J Radiol Prot 2022; 42:031513. [PMID: 35940166 DOI: 10.1088/1361-6498/ac87b7] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
The goal of the present study was to propose a set of preliminary regional diagnostic reference levels (DRLs) for pediatric interventional cardiology (IC) procedures in Latin America and the Caribbean countries, classified by age and weight groups. The study was conducted in the framework of the Optimization of Protection in Pediatric Interventional Radiology in Latin America and the Caribbean program coordinated by the World Health Organization and the Pan American Health Organization in cooperation with the International Atomic Energy Agency. The first step of the program was focused on pediatric IC. Dose data from diagnostic and therapeutic procedures were collected between December 2020 and December 2021. Regional DRLs were set as the third quartile of patient dose data (kerma area product) collected in 18 hospitals from 10 countries in an initial sample of 968 procedures. DRLs were set for four age bands and five weight ranges. The values obtained for the four age bands (<1 yr, 1 to <5 yr, 5 to <10 yr and 10 to <16 yr) were 2.9, 6.1, 8.8 and 14.4 Gy cm2for diagnostic procedures, and 4.0, 5.0, 10.0 and 38.1 Gy cm2for therapeutic procedures, respectively. The values obtained for the five weight bands (<5 kg, 5 to <15 kg, 15 to <30 kg, 30 to <50 kg and 50 to <80 kg) were 3.0, 4.5, 8.1, 9.2 and 26.8 Gy cm2for diagnostic procedures and 3.7, 4,3, 7.3, 16.1 and 53.4 Gy cm2for therapeutic procedures, respectively. While initial data were collected manually as patient dose management systems (DMSs) were not available in most of the hospitals involved in the program, a centralized automatic DMS for the collection and management of patient dose indicators has now been introduced and is envisaged to increase the sample size. The possibility of alerting on high dose values and introducing corrective actions will help in optimization.
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Affiliation(s)
- C Ubeda
- Departamento de Tecnología Médica, Facultad de Ciencias de la Salud, Universidad de Tarapacá, Arica, Chile
| | - E Vano
- Radiology Department, Faculty of Medicine, Complutense University and IdIS, San Carlos Hospital, 28040 Madrid, Spain
| | - M D Perez
- World Health Organization (WHO), Geneva, Switzerland
| | - P Jímenez
- Pan American Health Organization (PAHO), Washington, DC, United States of America
| | - R Ramirez
- International Atomic Energy Agency (IAEA), Vienna, Austria
| | - A Nader
- International Atomic Energy Agency (IAEA), Vienna, Austria
| | - P Miranda
- Luis Calvo Mackenna's Hospital, AntonioVaras 360, Santiago, Chile
| | - P Azcurra
- Hemodynamic Service, Italian Hospital, Buenos Aires, Argentina
| | - J Damsky
- Hemodynamic Service, Pedro de Elizalde Children's Hospital, Buenos Aires, Argentina
| | - S Capdevila
- Hemodynamic Service, Santísima Trinidad Children's Hospital, Córdova, Argentina
| | - M Oliveira
- Department of Health Technology and Biology, Federal Institute of Bahia, Salvador, Brazil
| | - J Albuquerque
- University Hospital of the Federal University of Maranhão, San Luis, Brasil
| | - R Bocamino
- Clinical Hospital of the Federal University of Paraná, Curitiba, Brasil
| | - H Schelin
- Pequeno Príncipe Hospital, Curitiba, Brasil
| | - A Yagui
- Pequeno Príncipe Hospital, Curitiba, Brasil
| | - D Aguirre
- Hemodynamic Service, Roberto del Rio Children's, Santiago, Chile
| | - N Riquelme
- Hemodynamic Service, Roberto del Rio Children's, Santiago, Chile
| | - L Cardenas
- Hemodynamic Service, Santa Maria Clinic, Santiago, Chile
| | - A Álvarez
- Hemodynamic Service, Santa Maria Clinic, Santiago, Chile
| | - W Mosquera
- Valle del Lili Foundation University Hospital ICESI, Cali, Colombia
| | - F Arias
- National Children's Hospital, San José, Costa Rica
| | - R Gutierrez
- National Children's Hospital, San José, Costa Rica
| | - R De la Mora
- National Directorate of Environmental Health, Ministry of Public Health, Havana, Cuba
| | - T Rivera
- Center for Research in Applied Sciences and Advanced Technology Legaria, IPN, Ciudad de México, Mexico
| | - J Zapata
- National Institute of Child Health St. Borja, Lima, Peru
| | - P Araujo
- National Cardiovascular Institute, Lima, Peru
| | - P Chiesa
- Children's Cardiology Institute, Montevideo, Uruguay
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Cockrum P, MacEwan J, Ramirez R. EP14.05-015 Quantifying Recent Trends in Real-World Treatment Patterns Among Adults Diagnosed with Small Cell Lung Cancer in the U.S. from 2013-2021. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.990] [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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Moreno M, Torres K, Tong C, García Castillo SS, Carrasco-Escobar G, Guedez G, Torres L, Herrera-Varela M, Guerra L, Guzman-Guzman M, Wong D, Ramirez R, Llanos-Cuentas A, Conn JE, Gamboa D, Vinetz JM. Insights into Plasmodium vivax Asymptomatic Malaria Infections and Direct Skin-Feeding Assays to Assess Onward Malaria Transmission in the Amazon. Am J Trop Med Hyg 2022; 107:154-161. [PMID: 35895359 PMCID: PMC9294676 DOI: 10.4269/ajtmh.21-1217] [Citation(s) in RCA: 2] [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] [Received: 11/22/2021] [Accepted: 02/24/2022] [Indexed: 11/07/2022] Open
Abstract
Understanding the reservoir and infectivity of Plasmodium gametocytes to vector mosquitoes is crucial to align strategies aimed at malaria transmission elimination. Yet, experimental information is scarce regarding the infectivity of Plasmodium vivax for mosquitoes in diverse epidemiological settings where the proportion of asymptomatically infected individuals varies at a microgeographic scale. We measured the transmissibility of clinical and subclinical P. vivax malaria parasite carriers to the major mosquito vector in the Amazon Basin, Nyssorhynchus darlingi (formerly Anopheles). A total of 105 participants with natural P. vivax malaria infection were recruited from a cohort study in Loreto Department, Peruvian Amazon. Four of 18 asymptomatic individuals with P. vivax positivity by blood smear infected colony-grown Ny. darlingi (22%), with 2.6% (19 of 728) mosquitoes infected. In contrast, 77% (44/57) of symptomatic participants were infectious to mosquitoes with 51% (890 of 1,753) mosquitoes infected. Infection intensity was greater in symptomatic infections (mean, 17.8 oocysts/mosquito) compared with asymptomatic infections (mean, 0.28 oocysts/mosquito), attributed to parasitemia/gametocytemia level. Paired experiments (N = 27) using direct skin-feeding assays and direct membrane mosquito-feeding assays showed that infectivity to mosquitoes was similar for both methods. Longitudinal studies with longer follow-up of symptomatic and asymptomatic parasite infections are needed to determine the natural variations of disease transmissibility.
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Affiliation(s)
- Marta Moreno
- Department of Biology, London School of Hygiene and Tropical Medicine, London, UK
| | - Katherine Torres
- Instituto de Medicina Tropical “Alexander von Humboldt,” Universidad Peruana Cayetano Heredia, Lima, Peru
- Address correspondence to Katherine Torres, Malaria Laboratory, Laboratorios de Investigación y Desarrollo, Faculty of Science and Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, 15102, Lima, Perú. E-mail:
| | - Carlos Tong
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Stefano S. García Castillo
- Laboratorio de Malaria, Parásitos y Vectores, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | | | - Gerson Guedez
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Lutecio Torres
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Manuela Herrera-Varela
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Layné Guerra
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Mitchel Guzman-Guzman
- Instituto de Medicina Tropical “Alexander von Humboldt,” Universidad Peruana Cayetano Heredia, Lima, Peru
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Daniel Wong
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Roberson Ramirez
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | | | - Jan E. Conn
- Department of Biomedical Sciences, School of Public Health, University at Albany–State University of New York, Albany, New York
- Wadsworth Center, New York State Department of Health, Albany, New York
| | - Dionicia Gamboa
- Instituto de Medicina Tropical “Alexander von Humboldt,” Universidad Peruana Cayetano Heredia, Lima, Peru
- Laboratorio de Malaria, Parásitos y Vectores, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
- Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Joseph M. Vinetz
- Instituto de Medicina Tropical “Alexander von Humboldt,” Universidad Peruana Cayetano Heredia, Lima, Peru
- S Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, California
- Section of Infectious Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
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Cua J, Crespo E, Phelps S, Ramirez R, Roque-Torres G, Oyoyo U, Kwon SR. Tooth Color Change and Erosion: Hydrogen Peroxide Versus Non-peroxide Whitening Strips. Oper Dent 2022; 47:301-308. [PMID: 35584321 DOI: 10.2341/20-302-l] [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] [Accepted: 04/18/2021] [Indexed: 11/23/2022]
Abstract
AIM The study evaluated the efficacy and potential erosion of non-peroxide strips compared to hydrogen peroxide (HP) whitening strips (WSs). METHODS Color evaluation samples (N=64) were distributed into four groups and treated according to manufacturer's directions. NC: Negative control treated with water; BT: Non-peroxide Brilliant Dissolving Strips; FM: Non-peroxide Fancymay Teeth WSs; WS: Crest 3D Brilliance HP White Strips. A contact-type spectrophotometer was used to measure color at baseline (T1), 1-day posttreatment (T2), and 1-week posttreatment (T3). Teeth were cut to a rectangular block for micro-CT erosion assessment. The samples (N=30) were divided into five groups. In addition to the four groups for color assessment, a positive control (PC) treated with 0.25% citric acid was added. The samples were scanned, reconstructed, and measured for erosion depth using a micro-CT analysis program software. Kruskal-Wallis test was used to determine differences in color change and erosion depth among the groups. Tests of hypotheses were two-sided with an alpha level of 0.05. RESULTS The mean ΔE*ab at 1-day/1-week posttreatment were 2.4/2.5, 2.8/2.9, 2.8/3.2, and 8.6/11.0 for NC, BT, FM, and WS, respectively. There was a statistically significant difference for ΔE*ab at 1-day and 1-week posttreatment (p<0.001). Group WS had the highest color change, while the other three groups did not differ from each other (p>0.05). Mean erosion depths in microns were 0.52, 0.58, 0.42, 0.49, and 29.55 for NC, BT, FM, WS, and PC, respectively. There was a statistically significant difference among the groups (p=0.004). Group PC had the greatest erosion, while the other groups had negligible erosion that did not differ from each other (p>0.05). CONCLUSION Peroxide WSs had superior whitening efficacy compared to non-peroxide strips. None of the tested products compromised tooth structure integrity through enamel erosion.
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Affiliation(s)
- J Cua
- John Cua, RDH, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - E Crespo
- Elisabeth Crespo, RDH, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - S Phelps
- Sarah Phelps, RDH, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - R Ramirez
- Rachel Ramirez, RDH, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - G Roque-Torres
- Gina Roque-Torres, DDS, MS, PhD, assistant professor, Center for Dental Research, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - U Oyoyo
- Udochukwu Oyoyo, MPH, assistant professor, Dental Education Services, Loma Linda University School of Dentistry, Loma Linda, CA, USA
| | - S R Kwon
- *So Ran Kwon, DDS, MS, PhD, MS, professor & director of Student Research Program, Division of General Dentistry, Loma Linda University School of Dentistry, Loma Linda, CA, USA
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Smeltzer M, Bunn B, Choi Y, Coate L, Corona-Cruz J, Drilon A, Duma N, Edelman M, Fidler M, Gadgeel S, Goto Y, Herbst R, Hesdorffer M, Higgins K, Labdi B, Leal T, Liu S, Mazotti J, Novello S, Patel S, Popat S, Ramirez R, Reckamp K, Reguart N, Soo R, Tan A, Wolf J, Yano S, Stiles B, Baird A. OA17.04 The Global Impact of COVID-19 on Telehealth and Care for Persons With Thoracic Cancers. J Thorac Oncol 2021. [PMCID: PMC8523155 DOI: 10.1016/j.jtho.2021.08.093] [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: 11/04/2022]
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Thomas K, Smith C, Marsala A, Boudreaux J, Thiagarajan R, Ramirez R. P49.04 The use of Stereotactic Body Radiotherapy in Pulmonary Carcinoid Tumors: A Single Institution Retrospective Review. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.898] [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: 10/21/2022]
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Riddell EA, Iknayan KJ, Hargrove L, Tremor S, Patton JL, Ramirez R, Wolf BO, Beissinger SR. Exposure to climate change drives stability or collapse of desert mammal and bird communities. Science 2021; 371:633-636. [DOI: 10.1126/science.abd4605] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 01/05/2021] [Indexed: 12/15/2022]
Affiliation(s)
- E. A. Riddell
- Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50010, USA
| | - K. J. Iknayan
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
- San Francisco Estuary Institute, Richmond, CA 94804, USA
| | - L. Hargrove
- Department of Birds and Mammals, San Diego Natural History Museum, San Diego, CA 92101, USA
| | - S. Tremor
- Department of Birds and Mammals, San Diego Natural History Museum, San Diego, CA 92101, USA
| | - J. L. Patton
- Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA
| | - R. Ramirez
- Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA
| | - B. O. Wolf
- Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA
| | - S. R. Beissinger
- Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
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Freire RM, Palma JL, Michea S, Ramirez R, Baltazar SE, Denardin JC. Coercivity dependence of cation distribution in Co-based spinel: correlating theory and experiments. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01129k] [Citation(s) in RCA: 2] [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] [Indexed: 12/13/2022]
Abstract
The inversion degree of a spinel-type nanomaterial is an essential parameter to understand the magnetic and electronic properties of ferrites. By micromagnetic simulations, we were able to connect DFT calculations and experiments for CoFe2O4 NPs.
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Affiliation(s)
- R. M. Freire
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Instituto de Ciencias Químicas Aplicadas
| | - J. L. Palma
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Escuela de Ingeniería
| | - S. Michea
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Instituto de Ciencias Químicas Aplicadas
| | - R. Ramirez
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
| | - S. E. Baltazar
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Departamento de Física
| | - J. C. Denardin
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Departamento de Física
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Bhatia K, Ramirez R, Narasimhan B, Walsh S, Sud K, Uberoi G, Argulian E. Prognostic role of positron emission tomography in patients with known or suspected cardiac sarcoidosis. a systematic review and meta-analysis. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0286] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Sarcoidosis is a chronic inflammatory disorder of unclear etiology, characterized by the presence of non-caseating granulomas. Cardiac involvement occurs in upto 27 percent of patients, manifesting as atrioventricular blocks, ventricular arrhythmia or sudden cardiac death. Current guidelines cite insufficient evidence for the prognostic utility of positron emission tomography (PET) in patients with cardiac sarcoidosis. Thus, we performed a systematic review and meta-analysis of published studies to ascertain the prognostic significance of PET imaging in patients with suspected or diagnosed cardiac sarcoidosis.
Purpose
To review current literature and determine if PET has prognostic utility in patients with known or suspected cardiac sarcoidosis
Methods
We performed a comprehensive literature search of electronic databases (Embase, Medline and Web of Science) using MeSH terms and keywords for sarcoidosis and PET from inception through December 2019. Studies were eligible if they included patients with known and/or suspected cardiac sarcoidosis undergoing evaluation by PET with or without perfusion imaging and reported clinical events of interest. An abnormal PET study was defined as the presence of focal or focal-on-diffuse uptake of 18- fluorodeoxyglucose (18-FDG) by visual analysis. In studies with perfusion imaging, patients with only perfusion defects were excluded. The primary outcome of interest was a composite of major adverse cardiac events (MACE), including sustained ventricular tachycardia, sudden cardiac death. Secondary analysis studied association of MACE with focal right ventricular (RV) uptake in patients with an abnormal PET study. Pooled odds ratio (OR) and 95% confidence interval (CI) were calculated using a random-effects model. Heterogeneity of results among the studies was assessed using the Higgins I2 value.
Results
Out of a total of 1645 citations, 40 were selected for full-text review. Five studies were included in the final analysis with a total of 465 patients. mean follow-up was 2.3 years. Three of the five studies also reported frequency of abnormal RV uptake of 18-FDG. Patients with abnormal 18-FDG uptake on visual assessment had higher odds of MACE (OR 3.12, CI 1.9–5.01, p<0.00001), compared to known or suspected cardiac sarcoid patients with normal PET studies. Heterogeneity among studies was low (I2 = 0). In patients with an abnormal PET study, abnormal focal RV uptake of 18-FDG was associated with higher odds of MACE (OR 5.24, CI 1.1–25.1, p=0.04), with moderate heterogeneity among studies (I2=41).
Conclusion
In patients undergoing PET imaging for known or suspected cardiac sarcoidosis, abnormal metabolism on visual analysis is associated with increased risk of MACE. Furthermore, focal RV uptake further increases the risk of MACE in patients with abnormal PET imaging. Thus, PET imaging can serve as a tool to risk stratify patients with known or suspected cardiac sarcoidosis.
Forrest Plots
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Bhatia
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
| | - R Ramirez
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
| | - B Narasimhan
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
| | - S Walsh
- Icahn School of Medicine at Mount Sinai, New York, United States of America
| | - K Sud
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
| | - G Uberoi
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
| | - E Argulian
- Mount Sinai St Luke's and Mount Sinai West, New York, United States of America
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Gallardo-Alvarado L, de León DC, Salcedo-Hernández R, Ramirez R, Barquet-Muñoz S, Isla-Ortiz D, Rivera-Buendia F, Perez-Montiel D, Quintanilla MP, Del Real S. Hemoglobin levels during treatment as prognostic factors in locally advanced cervical cancer in Mexican patients. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.307] [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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de León DC, Gallardo-Alvarado L, Salcedo-Hernández R, Perez-Montiel D, Ramirez R, Barquet-Muñoz S, Quintanilla MP, Rivera-Buendia F, Del Real S. Neoadjuvant chemotherapy in advanced epithelial ovarian cancer: Is the number of preoperative cycles important? Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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de León DC, Gallardo-Alvarado L, Ramirez R, Perez-Montiel D, Salcedo-Hernández R, Barquet-Muñoz S, Quintanilla MP, Rivera-Buendia F, Del Real S. Tumor histology as prognostic factor in locally advanced cervical cancer in a reference center. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.267] [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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Gallardo-Alvarado L, de León DC, Ramirez R, Barquet-Muñoz S, Salcedo-Hernández R, Perez-Montiel D, Rivera-Buendia F, Del Real S, Quintanilla MP, Perez-Marquez J. Do the young have a worse prognosis in comparison to the geriatric patients with locally advanced cervical cancer? Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.294] [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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de León DC, Gallardo-Alvarado L, Ramirez R, Perez-Montiel D, Quintanilla MP, Del Real S. Locally advanced cervical cancer: Are there differences between young and geriatric patients? Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.664] [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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Rosas-Aguirre A, Guzman-Guzman M, Chuquiyauri R, Moreno M, Manrique P, Ramirez R, Carrasco-Escobar G, Rodriguez H, Speybroeck N, Conn JE, Gamboa D, Vinetz JM, Llanos-Cuentas A. Temporal and Microspatial Heterogeneity in Transmission Dynamics of Coendemic Plasmodium vivax and Plasmodium falciparum in Two Rural Cohort Populations in the Peruvian Amazon. J Infect Dis 2020; 223:1466-1477. [PMID: 32822474 DOI: 10.1093/infdis/jiaa526] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 05/05/2020] [Accepted: 08/17/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Malaria is highly heterogeneous: its changing malaria microepidemiology needs to be addressed to support malaria elimination efforts at the regional level. METHODS A 3-year, population-based cohort study in 2 settings in the Peruvian Amazon (Lupuna, Cahuide) followed participants by passive and active case detection from January 2013 to December 2015. Incidence and prevalence rates were estimated using microscopy and polymerase chain reaction (PCR). RESULTS Lupuna registered 1828 infections (1708 Plasmodium vivax, 120 Plasmodium falciparum; incidence was 80.7 infections/100 person-years (95% confidence interval [CI] , 77.1-84.5). Cahuide detected 1046 infections (1024 P vivax, 20 P falciparum, 2 mixed); incidence was 40.2 infections/100 person-years (95% CI, 37.9-42.7). Recurrent P vivax infections predominated onwards from 2013. According to PCR data, submicroscopic predominated over microscopic infections, especially in periods of low transmission. The integration of parasitological, entomological, and environmental observations evidenced an intense and seasonal transmission resilient to standard control measures in Lupuna and a persistent residual transmission after severe outbreaks were intensively handled in Cahuide. CONCLUSIONS In 2 exemplars of complex local malaria transmission, standard control strategies failed to eliminate submicroscopic and hypnozoite reservoirs, enabling persistent transmission.
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Affiliation(s)
- Angel Rosas-Aguirre
- Research Institute of Health and Society, Université Catholique de Louvain, Brussels, Belgium.,Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Mitchel Guzman-Guzman
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Raul Chuquiyauri
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Marta Moreno
- Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, California, USA.,London School of Hygiene and Tropical Medicine, Department of Immunology and Infection, London, United Kingdom
| | - Paulo Manrique
- Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Roberson Ramirez
- Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Gabriel Carrasco-Escobar
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú.,Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Hugo Rodriguez
- Dirección Regional de Salud Loreto DIRESA Loreto, Loreto, Perú
| | - Niko Speybroeck
- Research Institute of Health and Society, Université Catholique de Louvain, Brussels, Belgium
| | - Jan E Conn
- Wadsworth Center, New York State Department of Health, Albany, New York, USA.,Department of Biomedical Sciences, School of Public Health, University at Albany, State University of New York, Albany, New York, USA
| | - Dionicia Gamboa
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú.,Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Joseph M Vinetz
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Laboratorio International Centers of Excellence in Malaria Research-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú.,Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú.,Section of Infectious Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - Alejandro Llanos-Cuentas
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú.,Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima, Perú
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Gutierrez-Villamil C, Peix A, Orellana P, Berrocal I, Ramirez R, Estrada-Lobato E, Paez D. Impact of International Atomic Energy Agency support to the development of nuclear cardiology in low-and-middle-income countries: Case of Latin America and the Caribbean. J Nucl Cardiol 2019; 26:2048-2054. [PMID: 31286416 PMCID: PMC6908563 DOI: 10.1007/s12350-019-01805-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/17/2019] [Indexed: 11/26/2022]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of death in Latin America and the Caribbean (LAC) region as well as worldwide. Lifestyle, nutritional habits and the upsurge of obesity have contributed to the increase in the prevalence of CVDs in the region. The role of nuclear cardiology in the management of patients with CVDs is well established. Particularly, myocardial perfusion imaging is widely used in LAC countries and has been increasingly integrated into the healthcare systems in the region for the diagnosis of coronary artery disease, risk stratification and to guide patient management. In its role to support countries around the world to address their health needs through the peaceful applications of nuclear techniques, the International Atomic Energy Agency (IAEA) has provided assistance to the LAC region for the establishment and strengthening of the nuclear cardiology practice. To that extent, the IAEA provides support in building capacities of multidisciplinary teams of professionals, the provision of medical equipment and the promotion of communication and exchange of knowledge among the different stakeholders. In addition, the IAEA encourages the participation of nuclear medicine centers in international multi-center research studies. In this paper, we present some of the projects through which the IAEA has supported the LAC region, including regional technical cooperation projects and coordinated research projects related to cardiology within the current multimodality approach to cardiac imaging.
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Affiliation(s)
- C Gutierrez-Villamil
- Servicio de Medicina Nuclear, Fundación Cardioinfantil - Instituto de Cardiología, Bogotá, Colombia
- Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - A Peix
- Nuclear Medicine Department, Institute of Cardiology, 17 No. 702, Vedado, CP 10 400, Havana, Cuba.
| | - P Orellana
- Nuclear Medicine Unit, Radiology Department, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - I Berrocal
- Hospital San Juan de Dios, San Jose, Costa Rica
| | - R Ramirez
- Technical Cooperation Section for Latin America and the Caribbean, International Atomic Energy Agency, Vienna, Austria
| | - E Estrada-Lobato
- Nuclear Medicine and Diagnostic Imaging Section, International Atomic Energy Agency, Vienna, Austria
| | - D Paez
- Nuclear Medicine and Diagnostic Imaging Section, International Atomic Energy Agency, Vienna, Austria
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17
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Manrique P, Miranda-Alban J, Alarcon-Baldeon J, Ramirez R, Carrasco-Escobar G, Herrera H, Guzman-Guzman M, Rosas-Aguirre A, Llanos-Cuentas A, Vinetz JM, Escalante AA, Gamboa D. Microsatellite analysis reveals connectivity among geographically distant transmission zones of Plasmodium vivax in the Peruvian Amazon: A critical barrier to regional malaria elimination. PLoS Negl Trop Dis 2019; 13:e0007876. [PMID: 31710604 PMCID: PMC6874088 DOI: 10.1371/journal.pntd.0007876] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/21/2019] [Accepted: 10/25/2019] [Indexed: 12/31/2022] Open
Abstract
Despite efforts made over decades by the Peruvian government to eliminate malaria, Plasmodium vivax remains a challenge for public health decision-makers in the country. The uneven distribution of its incidence, plus its complex pattern of dispersion, has made ineffective control measures based on global information that lack the necessary detail to understand transmission fully. In this sense, population genetic tools can complement current surveillance. This study describes the genetic diversity and population structure from September 2012 to March 2015 in three geographically distant settlements, Cahuide (CAH), Lupuna (LUP) and Santa Emilia (STE), located in the Peruvian Amazon. A total 777 P. vivax mono-infections, out of 3264, were genotyped. Among study areas, LUP showed 19.7% of polyclonal infections, and its genetic diversity (Hexp) was 0.544. Temporal analysis showed a significant increment of polyclonal infections and Hexp, and the introduction and persistence of a new parasite population since March 2013. In STE, 40.1% of infections were polyclonal, with Hexp = 0.596. The presence of four genetic clusters without signals of clonal expansion and infections with lower parasite densities compared against the other two areas were also found. At least four parasite populations were present in CAH in 2012, where, after June 2014, malaria cases decreased from 213 to 61, concomitant with a decrease in polyclonal infections (from 0.286 to 0.18), and expectedly variable Hexp. Strong signals of gene flow were present in the study areas and wide geographic distribution of highly diverse parasite populations were found. This study suggests that movement of malaria parasites by human reservoirs connects geographically distant malaria transmission areas in the Peruvian Amazon. The maintenance of high levels of parasite genetic diversity through human mobility is a critical barrier to malaria elimination in this region. Plasmodium vivax transmission is heterogeneous and discontinuous in the Peruvian Amazon. Such heterogeneity is the result of factors that include, but are not restricted to, the environment, public policies, and characteristics of the parasite, the vector, and human activities. All these factors make P. vivax transmission resilient to interventions. In order to achieve the goals of control and local elimination, P. vivax surveillance must inform how those factors sustain disease transmission in order to focalize and synchronize control strategies. In this study, we implemented molecular surveillance complemented with population genetic tools in the areas of Cahuide, Lupuna, and Santa Emilia located in the Peruvian Amazon. In particular, we characterize the transmission and the parasite genetic variation in these sites from September 2012 to March 2015. The changes in parasite diversity, the wide geographic dispersion of parasite subpopulation and the introduction of a new parasite clone or subpopulation in Lupuna documented in this study suggest that connectivity among the different endemic areas, likely due to human mobility, sustains disease transmission in the region hindering the success of control measures. This information must be considered in the design of current control strategies.
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Affiliation(s)
- Paulo Manrique
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
- * E-mail:
| | - Julio Miranda-Alban
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Jhonatan Alarcon-Baldeon
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Roberson Ramirez
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Gabriel Carrasco-Escobar
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Henry Herrera
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Mitchel Guzman-Guzman
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Angel Rosas-Aguirre
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
- Fund for Scientific Research FNRS, Brussels, Belgium
- Research Institute of Health and Society (IRSS), Université catholique de Louvain, Brussels, Belgium
| | - Alejandro Llanos-Cuentas
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
- Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Joseph M. Vinetz
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
- Yale School of Medicine, Section of Infectious Diseases, Department of Internal Medicine, New Haven, Connecticut, United States of America
- Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Ananias A. Escalante
- Institute for Genomics and Evolutionary Medicine (IGEM), Temple University, Philadelphia, Pennsylvania, United States of America
| | - Dionicia Gamboa
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofa, Universidad Peruana Cayetano Heredia, Lima, Perú
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Perú
- Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
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18
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Gnatiuc L, Alegre-Diaz J, Garcilazo-Avila A, Ramirez R, Gonzales-Carballo C, Solano-Sanchez M, Chiquete E, Wade R, Clarke R, Herrington WG, Collins R, Peto R, Tapia-Conyer R, Kuri-Morales P, Emberson J. P3824Body composition and mortality from vascular or metabolic causes among 150,000 participants in the Mexico City Prospective Study. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0666] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Higher body-mass index is associated with increased mortality from vascular disease, renal disease and other metabolic causes. However, body mass reflects both fat and lean mass, which may have very different effects on risk. We investigated the individual and joint relevance of fat and lean mass to mortality from these causes, using data from the Mexico City Prospective Study.
Methods
Between 1998 and 2004, 150,000 adults from Mexico City were recruited into a prospective study and tracked for cause-specific mortality for 14 years. Fat and lean mass at recruitment were predicted using Mexican-specific anthropometric equations, validated in a subset of participants with additional bio-impedance measures. Cox regression was used to assess the relevance of fat and lean mass at recruitment to mortality from a vascular, renal, or other metabolic cause at ages 35–74 years. Analyses were adjusted for age at risk, sex, residential district, education, recreational physical activity, smoking and alcohol consumption. To avoid reverse causality, analyses excluded those with diabetes or other chronic diseases at recruitment, and deaths in the first 5 years of follow-up. Mortality rate ratios (RRs) relate to the differences per SD of the usual values of various factors or the differences between the top tenth and bottom fifth of the values.
Results
Among 112,923 participants aged 35–74 years, mean (SD) fat mass in men and women was 22.0 (6.4) kgs and 29.4 (7.8) kgs respectively, while mean (SD) lean mass was 54.9 (7.2) kgs and 39.2 (5.0) kgs respectively. In both men and women, equation-predicted fat and lean mass closely matched the bio-impedance values (all r>0.86). Both fat and lean mass were positively and approximately log-linearly associated with mortality from a vascular or metabolic cause. However, the association of lean mass with mortality was more than accounted for by the correlation of lean with fat mass. Hence, after adjustment for fat mass, lean mass was inversely associated with risk. For a given amount of fat mass, the RR for vascular/metabolic mortality comparing those in the top tenth versus bottom fifth of the predicted lean mass was 0.35 (95% CI 0.24–0.52). Conversely, for a given amount of lean mass, the RR comparing those in the top tenth versus bottom fifth of the predicted fat mass was 4.06 (3.06–5.39). The RRs associated with each SD higher fat mass (1.51, 1.40–1.63) or lean mass (0.79, 0.73–0.86) appeared to be little affected by age, sex, or levels of other confounders, and were broadly similar for the major vascular, renal, and other metabolic mortality. The height-adjusted RRs were 1.41 (1.30–1.53) for fat mass and 0.91 (0.82–1.00) for lean mass.
Conclusions
In this Mexican cohort, predicted fat and lean mass had opposing effects on vascular and other metabolic deaths, with no evidence of any thresholds throughout the ranges studied.
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Affiliation(s)
- L Gnatiuc
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - J Alegre-Diaz
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - A Garcilazo-Avila
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - R Ramirez
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - C Gonzales-Carballo
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - M Solano-Sanchez
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - E Chiquete
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - R Wade
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - R Clarke
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - W G Herrington
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - R Collins
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - R Peto
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - R Tapia-Conyer
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - P Kuri-Morales
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - J Emberson
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
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Ramirez R, Matrana M, Satti S, Griffin R, Voros B, Mohammed A, Thiagarajan R, Boudreaux J, Woltering E. EP1.12-18 NET-001: A Phase II Study of ABI-009 in Metastatic Neuroendocrine Tumors of the Lung or Gastroenteropancreatic System. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Holder JP, Izumi N, Beach M, Ayers MJ, Bell P, Schneider M, Bradley DK, Kohut T, Ehrlich R, Cohen M, Ramirez R, Thorn D. On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility. Rev Sci Instrum 2018; 89:10F123. [PMID: 30399981 DOI: 10.1063/1.5039363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
At the National Ignition Facility (NIF), storage phosphor image plates (IP) are used extensively for recording x-rays, charged particles, and neutrons. For x-ray imaging and spectroscopy, absolute and relative calibrations are important for extracting plasma information from the diagnostics. We use Fuji MS, SR, and TR image plates that have been cut to fit custom diagnostic envelopes. The image plates are scanned on a General Electric FLA 7000 IP flying spot scanner. Calibrations for sensitivity, spatial scale, and temperature dependent fade are applied. During a set of recent calibrations, we noticed large shifts in the absolute calibration of the image plate system. The possible source of these shifts is discussed. We discuss scanner stability and a method for calibration. We discuss the fade and temperature effects of the image plates and how this correction is applied within the NIF environment. We also compare our NIF GE FLA 7000 IP scanner with a new General Electric Amersham Typhoon IP scanner.
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Affiliation(s)
- J P Holder
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Beach
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J Ayers
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Bell
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D K Bradley
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Kohut
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Ehrlich
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Cohen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Ramirez
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Thorn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Hidalgo M, Epelbaum R, Wolpin B, Stemmer S, Geva R, Golan T, Borazanci E, Borad M, Pedersen K, Park J, Ramirez R, Peled A, Lustig T, Bohana Kashtan O, Rosenfeld O, Sorani E, Schlienger K, Vainstein Haras A, Von Hoff D. A phase IIa trial to assess the safety and efficacy of BL-8040 and pembrolizumab in patients with metastatic pancreatic adenocarcinoma (PDAC). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy288.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Segelov E, Bergsland E, Card C, Hope T, Kunz P, Laidley D, Lawrence B, Leyden S, Michael M, Modahl L, Myrehaug S, Padda S, Pommier R, Ramirez R, Soulen M, Strosberg J, Thawer A, Wei B, Singh S. The commonwealth neuroendocrine tumour collaboration (CommNETs) and North American neuroendocrine tumor society (NANETS) endorsement and update of European neuroendocrine tumor society (ENETS) best practice consensus for lung neuroendocrine tumors (LNET). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy293.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chinnock B, Hendey G, Woolard R, Crawford S, Mainis L, Vo D, Wells R, Ramirez R, Bengiamin D. 148 Sensitivity of a Bedside Reagent Strip for the Detection of Spontaneous Bacterial Peritonitis in Emergency Patients With Ascites. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.153] [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]
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Ramirez R, Voros B, Page P, Boudreaux J, Thiagarajan R, Woltering E. P2.12-07 Utility of Stereotactic Body Radiotherapy in Pulmonary Carcinoid Tumors. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1383] [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: 11/29/2022]
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25
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Broomfield A, Zuberi K, Mercer J, Moss G, Finnegan N, Hensman P, Walker R, Bukhari S, Wright NB, Stewart F, Jones SA, Ramirez R. Outcomes from 18 years of cervical spine surgery in MPS IVA: a single centre's experience. Childs Nerv Syst 2018; 34:1705-1716. [PMID: 29946810 DOI: 10.1007/s00381-018-3823-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 05/04/2018] [Indexed: 01/26/2023]
Abstract
PURPOSE This study examines the long-term outcomes of paediatric Morquio (MPS IVA) patients undergoing cervical spine surgery and evaluates the factors that impacting this. METHODS A retrospective review was performed on all MPS IVA patients undergoing cervical spine surgery, since the introduction of standardised neuroradiological screening. The impact of preoperative neurological status, growth, genotype and radiological status on outcome is assessed, whilst long-term surgical, radiological and neurological outcomes are documented. RESULTS Twenty-six of the eighty-two MPS IVA patients (31%) reviewed underwent cervical spine surgery at a median age of 6.1 years (range, 1.45 to 15.24). Preoperatively, cord signal change was seen in 11 patients with 5 being myelopathic; however, 6 clinically manifesting patients had no overt cord signal change. Postoperatively, none of the 14 preoperatively clinically asymptomatic patients followed long term progressed neurologically during a median follow-up of 77.5 months (range = 18-161). Of the ten preoperatively clinically symptomatic patients who were followed up for the same duration, seven continued to deteriorate, two initially improved and one remained stable. Radiological follow-up performed for a median duration of 7 years (range = 0.5-16) has shown a degree of stenosis at the level immediately caudal to the termination of the graft in 76% of patients, though only one has become clinically symptomatic and required revision. CONCLUSIONS Once clinically elicitable neurological signs become evident in patients with MPS IVA, they tend to progress despite surgical intervention. Referring clinicians should also not be falsely reassured by the lack of T2 spinal cord signal change but should consider surgical intervention in the face of new clinical symptomology or radiological signs of progressive canal stenosis or instability.
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Affiliation(s)
- A Broomfield
- Willink Biochemical Genetics Unit, Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK.
| | - K Zuberi
- Faculty of Biology, Medicine and Health, The University of Manchester, Oxford Rd, Manchester, M13 9PL, UK
| | - J Mercer
- Willink Biochemical Genetics Unit, Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - G Moss
- Willink Biochemical Genetics Unit, Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - N Finnegan
- Willink Biochemical Genetics Unit, Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - P Hensman
- Department of Physiotherapy, Royal Manchester Children's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - R Walker
- Department of Paediatric Anaesthetics, Royal Manchester Children's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - S Bukhari
- Department of Paediatric Neurosurgery, Royal Manchester Children's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - N B Wright
- Department of Paediatric Radiology, Royal Manchester Children's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - F Stewart
- N.I Regional Genetics Service, Level A, Belfast City Hospital, Lisburn Rd, Belfast, BT9 7AB, UK
| | - S A Jones
- Willink Biochemical Genetics Unit, Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - R Ramirez
- Department of Paediatric Neurosurgery, Royal Manchester Children's Hospital, Central Manchester Foundation Trust, Manchester, M13 9WL, UK
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Gnatiuc L, Alegre-Diaz J, Wade R, Ramirez R, Herrington WG, Solano M, Clarke R, Lewington SL, Collins R, Peto R, Tapia-Conyer R, Emberson J, Kuri-Morales P. P6282Adiposity and vascular-metabolic mortality among 150,000 Mexican adults followed for 15 years. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6282] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L Gnatiuc
- University of Oxford, CTSU, Oxford, United Kingdom
| | - J Alegre-Diaz
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - R Wade
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - R Ramirez
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | | | - M Solano
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - R Clarke
- University of Oxford, CTSU, Oxford, United Kingdom
| | - S L Lewington
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - R Collins
- University of Oxford, CTSU, Oxford, United Kingdom
| | - R Peto
- University of Oxford, CTSU, Oxford, United Kingdom
| | - R Tapia-Conyer
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - J Emberson
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - P Kuri-Morales
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
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Rosas-Aguirre A, Guzman-Guzman M, Gamboa D, Chuquiyauri R, Ramirez R, Manrique P, Carrasco-Escobar G, Puemape C, Llanos-Cuentas A, Vinetz JM. Micro-heterogeneity of malaria transmission in the Peruvian Amazon: a baseline assessment underlying a population-based cohort study. Malar J 2017; 16:312. [PMID: 28778210 PMCID: PMC5544973 DOI: 10.1186/s12936-017-1957-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 07/28/2017] [Indexed: 11/10/2022] Open
Abstract
Background Understanding the dynamics of malaria transmission in diverse endemic settings is key for designing and implementing locally adapted and sustainable control and elimination strategies. A parasitological and epidemiological survey was conducted in September–October 2012, as a baseline underlying a 3-year population-based longitudinal cohort study. The aim was to characterize malaria transmission patterns in two contrasting ecological rural sites in the Peruvian Amazon, Lupuna (LUP), a riverine environment, and Cahuide (CAH), associated with road-linked deforestation. Methods After a full population census, 1941 individuals 3 years and older (829 in LUP, 1112 in CAH) were interviewed, clinically examined and had a blood sample taken for the detection of malaria parasites by microscopy and PCR. Species-specific parasite prevalence was estimated overall and by site. Multivariate logistic regression models assessed risk factors for parasite infection by PCR, while SaTScan detected spatial clusters of PCR-positive individuals within each site. In addition, data from routine malaria surveillance in the period 2009–2012 were obtained. Results Parasite prevalence by PCR was higher in CAH than in LUP for Plasmodium vivax (6.2% vs. 3.9%) and for Plasmodium falciparum (2.6% vs. 1.2%). Among PCR-confirmed infections, asymptomatic (Asy) parasite carriers were always more common than symptomatic (Sy) infections for P. vivax (Asy/Sy ratio: 2/1 in LUP and 3.7/1 in CAH) and for P. falciparum (Asy/Sy ratio: 1.3/1 in LUP and 4/1 in CAH). Sub-patent (Spat) infections also predominated over patent (Pat) infections for both species: P. vivax (Spat/Pat ratio: 2.8/1 in LUP and 3.7/1 in CAH) and P. falciparum malaria (Spat/Pat ratio: 1.9/1 in LUP and 26/0 in CAH). For CAH, age, gender and living in a household without electricity were significantly associated with P. vivax infection, while only age and living in a household with electricity was associated with P. falciparum infection. For LUP, only household overcrowding was associated with P. falciparum infection. The spatial analysis only identified well-defined clusters of P. vivax and P. falciparum infected individuals in CAH. Reported malaria incidence indicated that malaria transmission has long occurred in LUP with primarily seasonal patterns, and confirmed a malaria outbreak in CAH since May 2012. Conclusions This parasitological and epidemiological baseline assessment demonstrates that malaria transmission and parasite prevalence is heterogeneous in the Peruvian Amazon, and influenced by local socio-demographics and ecological contexts. Riverine and road construction/deforestation contexts must be taken into account in order to carry out effective anti-malaria control and elimination efforts. Electronic supplementary material The online version of this article (doi:10.1186/s12936-017-1957-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Angel Rosas-Aguirre
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Research Institute of Health and Society (IRSS), Université Catholique de Louvain, 1200, Brussels, Belgium
| | - Mitchel Guzman-Guzman
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Dionicia Gamboa
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Raul Chuquiyauri
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Division of Infectious Diseases, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive MC0760, Biomedical Research Facility-2, Room 4A16, La Jolla, California, CA, 92093, USA
| | - Roberson Ramirez
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Paulo Manrique
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Gabriel Carrasco-Escobar
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Carmen Puemape
- Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Alejandro Llanos-Cuentas
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 31, Peru.,Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima 31, Peru
| | - Joseph M Vinetz
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima 31, Peru. .,Laboratorio ICEMR-Amazonia, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru. .,Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima 31, Peru. .,Division of Infectious Diseases, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive MC0760, Biomedical Research Facility-2, Room 4A16, La Jolla, California, CA, 92093, USA.
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Alegre-Diaz J, Gnatiuc L, Wade R, Ramirez R, Herrington W, Lewington S, Lopez Cervantes M, Solano M, Peto R, Collins R, Tapia-Conyer R, Kuri-Morales P, Emberson J. P6257Blood pressure and death from vascular and metabolic diseases in Mexico City: 12-year follow-up of 150,000 adults. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6257] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. Alegre-Diaz
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - L. Gnatiuc
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - R. Wade
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - R. Ramirez
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - W.G. Herrington
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - S.L. Lewington
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
| | - M. Lopez Cervantes
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - M. Solano
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - R. Peto
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - R. Collins
- University of Oxford, CTSU, Nuffield Department of Population Health,, Oxford, United Kingdom
| | - R. Tapia-Conyer
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - P. Kuri-Morales
- National Autonomous University of Mexico, School of Medicine, Mexico City, Mexico
| | - J.R. Emberson
- University of Oxford, MRC Population Health Research Unit; Nuffield Department of Population Health, Oxford, United Kingdom
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Rovira-Vallbona E, Contreras-Mancilla JJ, Ramirez R, Guzmán-Guzmán M, Carrasco-Escobar G, Llanos-Cuentas A, Vinetz JM, Gamboa D, Rosanas-Urgell A. Predominance of asymptomatic and sub-microscopic infections characterizes the Plasmodium gametocyte reservoir in the Peruvian Amazon. PLoS Negl Trop Dis 2017; 11:e0005674. [PMID: 28671944 PMCID: PMC5510906 DOI: 10.1371/journal.pntd.0005674] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [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] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 07/14/2017] [Accepted: 05/31/2017] [Indexed: 11/18/2022] Open
Abstract
Malaria transmission requires that Anopheles mosquitoes ingest Plasmodium gametocyte stages circulating in the human bloodstream. In the context of malaria elimination, understanding the epidemiology of gametocytes relative to all Plasmodium infections and the contribution of asymptomatic and sub-microscopic parasite carriers to the gametocyte reservoir is necessary, especially in low endemic settings with predominance of P.vivax. A 13-month longitudinal study was conducted in two communities (n = 1935 individuals) of Loreto Department, Peru, with five active screenings for Plasmodium infections and gametocyte stages by quantitative real-time PCR (qPCR) and reverse transcription (RT)-qPCR, respectively. Parasite prevalence by qPCR was 7.2% for P.vivax (n = 520/7235; range by survey 6.0%-8.1%) and 3.2% for P.falciparum (n = 235/7235; range by survey 0.4%-7.7%). Sub-microscopic infections accounted for 73.5% of P.vivax (range by survey 60%-89%) and almost the totality of P.falciparum cases. Gametocytes were found in 28.4% P.vivax infections (range by survey 18.7%-34.1%), with a peak of 61.5% in one community at the start of the transmission season. About 59.8% of all P.vivax gametocyte carriers were asymptomatic and 31.9% were sub-microscopic. Age patterns for gametocyte prevalence paralleled asexual stage infections and peaked among >15–25 year old individuals. Asexual parasite density was found to be the strongest predictor for P.vivax gametocyte presence in longitudinal multivariate analysis (odds ratio 2.33 [95% confidence interval 1.96, 2.78]; P<0.001). Despite significant differences in seasonality patterns and P.vivax prevalence found at the local scale, sub-microscopic and asymptomatic infections predominate and contribute significantly to the gametocyte reservoir in different communities of the Peruvian Amazon. Control and elimination campaigns need sensitive tools to detect all infections that escape routine malaria surveillance, which may contribute to maintain transmission in the region. Malaria elimination, i.e. the complete interruption of parasite transmission in a region, is in the agenda of health authorities in countries that achieved substantial reduction of the disease burden in the past decade. However, our understanding of transmission epidemiology for low transmission areas where Plasmodium vivax is endemic, like the Amazon basin, is still limited. In this study, we describe the prevalence and risk factors for carrying the parasite stages that are transmitted to the mosquito vectors, named gametocytes, in 1935 individuals from two communities of the Peruvian Amazon that were regularly screened during 1 year. We report that malaria infections with no clinical symptoms and those with parasite levels below microscopy detection threshold, account for two thirds of all P.vivax infections with gametocytes, and that the highest infection rate is found among young adults. In addition, almost the totality of P.falciparum infections detected was sub-microscopic. Because all these infections escape current malaria surveillance systems -based on passive case detection and/or microscopy diagnosis-, new approaches are necessary to target all infections in order to eliminate the malaria transmission reservoir in Peru.
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Affiliation(s)
- Eduard Rovira-Vallbona
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- * E-mail:
| | | | - Roberson Ramirez
- Laboratorio Satelite Iquitos UPCH-UCSD, Universidad Peruana Cayetano Heredia, Loreto, Peru
| | - Mitchel Guzmán-Guzmán
- Laboratorio Satelite Iquitos UPCH-UCSD, Universidad Peruana Cayetano Heredia, Loreto, Peru
| | - Gabriel Carrasco-Escobar
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Alejandro Llanos-Cuentas
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Joseph M. Vinetz
- Department of Medicine, University of California San Diego, San Diego, California, United States of America
| | - Dionicia Gamboa
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
- Departamento de Ciencias Celulares y Moleculares, Facultad de Ciencias y Filosofia, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Anna Rosanas-Urgell
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
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Stalcup P, Croft B, Ramirez R, Darracq M. 204 Haloperidol Undermining Gastroparesis Symptoms in the Emergency Department. Ann Emerg Med 2016. [DOI: 10.1016/j.annemergmed.2016.08.218] [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: 11/25/2022]
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Gellert GA, Hill V, Bruner K, Maciaz G, Saucedo L, Catzoela L, Ramirez R, Jacobs WJ, Nguyen P, Patel L, Webster SL. Successful Implementation of Clinical Information Technology: Seven Key Lessons from CPOE. Appl Clin Inform 2015; 6:698-715. [PMID: 26767065 DOI: 10.4338/aci-2015-06-soa-0067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 10/08/2015] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To identify and describe the most critical strategic and operational contributors to the successful implementation of clinical information technologies, as deployed within a moderate sized system of U.S. community hospitals. BACKGROUND AND SETTING CHRISTUS Health is a multi-state system comprised of more than 350 services and 60 hospitals with over 9 000 physicians. The Santa Rosa region of CHRISTUS Health, located in greater San Antonio, Texas is comprised of three adult community hospital facilities and one Children's hospital each with bed capacities of 142-180. Computerized Patient Order Entry (CPOE) was first implemented in 2012 within a complex market environment. The Santa Rosa region has 2 417 credentialed physicians and 263 mid-level allied health professionals. METHODS This report focuses on the seven most valuable strategies deployed by the Health Informatics team in a large four hospital CHRISTUS region to achieve strong CPOE adoption and critical success lessons learned. The findings are placed within the context of the literature describing best practices in health information technology implementation. RESULTS While the elements described involved discrete de novo process generation to support implementation and operations, collectively they represent the creation of a new customer-centric service culture in our Health Informatics team, which has served as a foundation for ensuring strong clinical information technology adoption beyond CPOE. CONCLUSION The seven success factors described are not limited in their value to and impact on CPOE adoption, but generalize to - and can advance success in - varied other clinical information technology implementations across diverse hospitals. A number of these factors are supported by reports in the literature of other institutions' successful implementations of CPOE and other clinical information technologies, and while not prescriptive to other settings, may be adapted to yield value elsewhere.
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Affiliation(s)
- G A Gellert
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - V Hill
- Baylor College of Medicine, Pediatrics , San Antonio, TX, United States
| | - K Bruner
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - G Maciaz
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - L Saucedo
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - L Catzoela
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - R Ramirez
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - W J Jacobs
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
| | - P Nguyen
- CHRISTUS Santa Rosa Westover Hills Hospital , San Antonio, TX, United States
| | - L Patel
- CHRISTUS Santa Rosa Medical Center , San Antonio, TX, United States
| | - S L Webster
- CHRISTUS Health, Health Informatics , San Antonio, TX, United States
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Muñoz M, Moreno O, Yuste E, Poyatos ME, Ramirez R, Narbona S. Acynetobacter baumanii extremely resistant outbreak control in ICU: a multidisciplinary approach. Intensive Care Med Exp 2015. [PMCID: PMC4798271 DOI: 10.1186/2197-425x-3-s1-a132] [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: 11/13/2022] Open
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Caussade S, Castro-Rodriguez J, Contreras S, Bugueño R, Ramirez R, Padilla O, Einisman H, Holmgren N. Methacholine challenge test by wheezing and oxygen saturation in preschool children with asthma. Allergol Immunopathol (Madr) 2015; 43:174-9. [PMID: 24948183 DOI: 10.1016/j.aller.2014.02.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 01/17/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
Abstract
UNLABELLED Methacholine challenge test (MCT) performed with spirometry is a commonly used test to evaluate bronchial hyperreactivity (BHR) in children. However, preschoolers do not usually collaborate. OBJECTIVES To assess the usefulness of MCT through clinical evaluation (wheezing auscultation and decreased pulse arterial oxygen saturation [SpO2]) in recurrent wheezing preschoolers with asthma, in comparison to healthy controls. METHODS We performed the MCT (modified Cockroft method) on healthy and on asthmatic preschoolers. The end point was determined by the presence of wheezing in the chest and/or tracheal auscultation (PCw) and/or a decrease in SpO2 of ≥5 from the baseline value (PCSpO2). Maximal methacholine concentration was 8 mg/ml. RESULTS The study population comprised 65 children: 32 healthy and 33 asthmatic children. There were no differences in demographic characteristics between the groups. The median methacholine doses for PCw and for PCSpO2 were significantly lower among asthmatic than healthy children: 0.5 mg/ml (0.25-0.5 mg/ml) vs. 2 mg/ml (1-4 mg/ml), respectively, p<0.001; and 0.25 mg/ml (0.25-0.5 mg/ml) and 2 mg/ml (0.5-4 mg/ml), respectively, p<0.001. The best cut-off point of PCw was observed at a methacholine concentration of 0.5 mg/ml (AUC=0.72 [95% CI=0.66-0.77]), its sensitivity was 91%, specificity 43%, PPV 16% and NPV 98%. For PCSpO2 the best cut-off point was a methacholine concentration of 1 mg/ml (AUC=0.85 [95% CI 0.81-0.89]), with sensitivity of 80%, specificity 74%, PPV 49%, and NPV 92%. There were no adverse reactions. CONCLUSION MCT using clinical parameters such as wheezing auscultation and SpO2 measurement could be a useful and safe test to confirm BHR among preschoolers.
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Banh K, Ramirez R. Effectiveness of Emergency Medicine Experience in Third-Year Integrated Longitudinal Medical Student Programs. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.06.046] [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: 11/24/2022]
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Mateo C, Castell V, Julián R, Alarcon T, Otero A, Ramirez R, Duran E, Gutierrez-Misis A. Prevalence of hypovitaminosis D in a population of 65years and older. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.494] [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: 10/26/2022]
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De Lorenzi A, Olea FD, Hnatiuk A, Valdivieso L, Locatelli P, Ramirez R, Sepulveda D, Laguens R, Crottogini A. Effects of genetically modified adipose stromal cells implantation in rabbits with experimental peripheral vascular disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3273] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Julian R, Ramirez R, Rueda M, Latorre A, Castell V, Melgar A, Martin L, Duran E. AB1418-PC Impact of the physiotherapy unit in an urban primary care health centre. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1410] [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: 11/03/2022]
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Girard OM, Ramirez R, McCarty S, Mattrey RF. Toward absolute quantification of iron oxide nanoparticles as well as cell internalized fraction using multiparametric MRI. Contrast Media Mol Imaging 2012; 7:411-7. [PMID: 22649047 DOI: 10.1002/cmmi.1467] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Iron oxide nanoparticles (IONPs) are widely used as MR contrast agents because of their strong magnetic properties and broad range of applications. The contrast induced by IONPs typically depends on concentration, water accessibility, particle size and heterogeneity of IONP distribution within the microenvironment. Although the latter could be a tool to assess local physiological effects at the molecular level, it renders IONP quantification from relaxation measurements challenging. This study aims to quantify IONP concentration using susceptibility measurements. In addition, further analysis of relaxation data is proposed to extract quantitative information about the IONP spatial distribution. Mesenchymal stem cells were labeled with IONPs and the IONP concentration measured by mass spectroscopy. MR relaxation parameters (T(1), T(2), T(2)*) as well as magnetic susceptibility of cylindrical samples containing serial dilutions of mixtures of free and cell-internalized IONPs were measured and correlated with IONP concentration. Unlike relaxation data, magnetic susceptibility was independent of whether IONPs were free or internalized, making it an excellent candidate for IONP quantification. Using IONP concentration derived from mass spectroscopy and measured relaxation times, free and internalized IONP fractions were accurately calculated. Magnetic susceptibility was shown to be a robust technique to measure IONP concentration in this preliminary study. Novel imaging-based susceptibility mapping techniques could prove to be valuable tools to quantify IONP concentration directly by MRI, for samples of arbitrary shape. Combined with relaxation time mapping techniques, especially T(2) and T(2)*, this could be an efficient way to measure both IONP concentration and the internalized IONP fraction in vivo using MRI, to gain insight into tissue function and molecular imaging paradigms.
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Affiliation(s)
- O M Girard
- Department of Radiology, University of California San Diego, USA.
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Kaushal G, Ramirez R, Alambo D, Taupradist W, Choksi K, Sirbu C. Initial characterization of D-cycloserine for future formulation development for anxiety disorders. Drug Discov Ther 2012; 5:253-60. [PMID: 22466372 DOI: 10.5582/ddt.2011.v5.5.253] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The purpose of this study is to characterize D-cycloserine (DCS) physicochemical properties to facilitate future formulation development of DCS for anxiety disorders. A stability-indicating HPLC assay method for the quantitation of DCS was developed and calibrated to be used for this study. The partition coefficient was determined and compared with the predicted value. The solution stability of DCS was studied under various pH (2.0-11.5) and ionic strengths of 10 and 20 mM at physiological temperature of 37°C. The 250 mg capsule was compounded to the nominal strength of 50 mg used for anxiety disorders. These capsules were then put under stability. The in vitro dissolution was also carried out at 37°C as per the United States Pharmacopeia (USP) guidelines. The partition coefficient value (Kp) determined for the DCS was log Kp = -2.89 ± 0.06 (n = 6). The pH-solution stability profile shows that DCS has maximum stability under alkaline conditions. The maximum rate of degradation was seen at pH of 4.7. The mean percent recovery of DCS from the capsules compounded to strength of 50 mg was 100.3 ± 1.4. The stability study of the reformulated capsules concluded that reformulated DCS is stable for at least one year at room temperature. The in vitro dissolution illustrates that all the DCS is released from the capsules in 10 min. The present characterization of DCS study will serve as guidance for the future directions regarding the reformulation of DCS in order to be used in anxiety disorders.
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Affiliation(s)
- G Kaushal
- School of Pharmacy, University of Charleston, Charleston, WV, USA
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Christen T, Koch N, Philandrianos C, Ramirez R, Raffoul W, Beldi M, Casanova D. The V-Y latissimus dorsi musculocutaneous flap in the reconstruction of large posterior chest wall defects. Aesthetic Plast Surg 2012; 36:618-22. [PMID: 22258838 DOI: 10.1007/s00266-011-9866-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 12/13/2011] [Indexed: 10/14/2022]
Abstract
UNLABELLED Posterior chest wall defects are frequently encountered after excision of tumors as a result of trauma or in the setting of wound dehiscence after spine surgery. Various pedicled fasciocutaneous and musculocutaneous flaps have been described for the coverage of these wounds. The advent of perforator flaps has allowed the preservation of muscle function but their bulk is limited. Musculocutaneous flaps remain widely employed. The trapezius and the latissimus dorsi (LD) flaps have been used extensively for upper and middle posterior chest wounds, respectively. Their bulk allows for obliteration of the dead space in deep wounds. The average width of the LD skin paddle is limited to 10-12 cm if closure of the donor site is expected without skin grafting. In 2001 a modification of the skin paddle design was introduced in order to allow large flaps to be raised without requiring grafts or flaps for donor site closure. This V-Y pattern allows coverage of large anterior chest defects after mastectomy. We have modified this flap to allow its use for posterior chest wall defects. We describe the flap design, its indications, and its limitations with three clinical cases. LEVEL OF EVIDENCE V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors at www.springer.com/00266.
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Peyrani P, Allen M, Seligson D, Roberts C, Chen A, Haque N, Zervos M, Wiemken T, Harting J, Christensen D, Ramirez R. Clinical outcomes of osteomyelitis patients infected with methicillin-resistant Staphylococcus aureus USA-300 strains. Am J Orthop (Belle Mead NJ) 2012; 41:117-122. [PMID: 22530208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) USA-300 strains have emerged as an important cause of community-acquired infections. These strains have been recognized as an etiology of osteomyelitis but data on their incidence and outcomes are limited. We retrospectively studied the incidence and clinical outcomes of MRSA USA-300 osteomyelitis in patients at the University of Louisville Hospital and the Henry Ford Health System between January 2007 and March 2008. Pulsed-field gel electrophoresis was used to determine USA type. Clinical outcomes were defined as management success versus failure at 12 months. Chi-square tests, Fisher exact tests, and Mann-Whitney tests were used to compare patient characteristics on the basis of clinical outcomes and USA type. Of the 50 patients with MRSA osteomyelitis, 27 (54%) had the USA-300 strain. Clinical failure was identified in 22% (6/27) of the patients with MRSA USA-300 and in 30% (7/23) of the patients with MRSA non-USA-300 osteomyelitis (P = .509). Our results showed that MRSA USA-300 is a significant etiology of MRSA osteomyelitis. With current surgical and medical management, outcomes of patients with MRSA USA-300 osteomyelitis are similar to those of patients with MRSA non-USA-300 osteomyelitis.
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Affiliation(s)
- P Peyrani
- University of Louisville, Louisville, Kentucky 40202, USA
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Martin-Malo A, Merino A, Carracedo J, Alvarez-Lara MA, Ojeda R, Soriano S, Crespo R, Ramirez R, Aljama P. Effects of intravenous iron on mononuclear cells during the haemodialysis session. Nephrol Dial Transplant 2011; 27:2465-71. [DOI: 10.1093/ndt/gfr711] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kang YS, Cha JJ, Hyun YY, Lee MH, Song HK, Cha DR, Bang K, Jeong J, Shin JH, Kang JH, Yang J, Ahn C, Kim JH, Toledo K, Merino A, GonzaLez-Burdiel L, Perez-Saez MJ, Aguera M, Ramirez R, Del Castillo D, Aljama P, Kahveci A, Tugtepe H, Asicioglu E, Nalcaci S, Birdal G, Arikan H, Koc M, Tuglular S, Kaya H, Ozener C, Kocak G, Azak A, Huddam B, Astarci HM, Can M, Duranay M, Tayama Y, Hasegawa H, Takayanagi K, Matsuda A, Shimizu T, Asakura J, Iwashita T, Okazaki S, Hatano M, Kiba T, Ogawa T, Mitarai T, Sanchez JE, Nunez M, Gonzalez I, Fernandez-Vina A, Pelaez B, Quintana A, Rodriguez C, Park KA, Kim EJ, Choi SJ, Kim NR, Park MY, Kim JK, Hwang SD, Cotovio P, Rocha A, Carvalho MJ, Teixeira L, Mendonca D, Rodrigues A, Cabrita A, Ito M, Wu HY, Peng YS, Huang JW, Hu FC, Hung KY, Tsai TJ, Wu KD, Temiz G, Sahin G, Degirmenci N, Ozkurt S, Yalcin AU, Rufino M, Garcia C, Vega N, Macia M, Rodriguez A, Maceira B, Hernandez D, Lorenzo V, Levallois J, Nadeau-Fredette AC, Labbe AC, Laverdiere M, Ouimet D, Vallee M, Matsuda A, Katou H, Tayama Y, Iwanaga M, Ogawa T, Shimizu T, Asakura J, Noiri C, Kanouzawa K, Hasegawa H, Mitarai T, Karakan S, Sezer S, Ozdemir Acar N, Haberal M, Ueda A, Nagai K, Morimoto M, Hirayama A, Yoh K, Saito C, Yamagata K, Parikova A, Vlijm A, deGraaff M, Brabcova I, Viklicky O, Krediet R, Nagamine N, Katoh KI, Yoshitake O, Cho KH, Jung SY, Do JY, Park JW, Yoon KW, Hwang SD, Kim NR, Kim EJ, Chung CH, Park MY, Choi SJ, Kim JK, Mravljak M, Karas B, Pajek J, Pintar T, Benedik M, Gucek A, Tomo T, Kadota JI, Tsuchida K, Minakuchi J, Yamanaka M, Numata A, Masakane I, Fujimori A, Kawanishi H, Naito H, Bordignon J, Manonelles A, Andujar A, Gonzalez-Segura C, Gonzalez MT, Glavas-Boras S, Zlopasa G, Boras S, Smalcelj R, Slavicek J, Knezevic N, Puretic Z, Prasad N, Gupta A, Sinha A, Saxena A, Sharma RK, Kaul A, Ramos R, Gonzalez MT, Vera M, Garcia I, Barbosa F, Teixido J, Garcia C, Cuxart M, Gonzalez C, de la Cruz JJ, Fukuoka K, Sinozaki M, Kato N, Oba I, Harada K, Kanai H, Ota K, Do JY, Kang SW, Cho KH, Park JW, Shin KL, Kim YH, Yoon KW, Prasad N, Gupta A, Sinha A, Sharma RK, Kaul A, Saxena A, Schneider K, Huszar T, Bator B, Di Napoli A, Franco F, Salvatori MF, Di Lallo D, Guasticchi G, Hassan S, Kristal B, Khazim K, Hassan F, Hassan K, Korabecna M, Krizkova V, Kocova J, Tonar Z, Opatrna S, Gaiao S, Beco A, Oliveira A, Santos-Araujo C, Pestana M, Denizot A, Milliard B, Kahveci A, Asicioglu E, Arikan H, Tuglular S, Ozener C, Hsu BG, Lai YH, Wang CH, Fang TC, Yesil H, Paydas S, Balal M, Cinkir U, Sertdemir Y, Santos-Araujo C, Oliveira A, Beco A, Sousa J, Silva N, Santos D, Pestana M, Oliveira A, Beco A, Santos C, Pestana M, Vera M, Fontsere N, Maduell F, Arias M, Bergada E, Cases A, Campistol JM, Grzelak T, Czyzewska K, Mortazavi M, Seirafian S, Halabian M, Emami Naini A, Farajzadegan Z, Moinzade F, Golabchi K, Portoles J, Moreno F, Lopez-Sanchez P, Gomez M, Corchete E, del Peso G, Bajo MA, Rivera M, Arribas G, Ferreira AC, Fernandes V, Sousa J, Vila Lobos A, Nolasco F, Martino F, di Loreto P, Rodighiero MP, Crepaldi C, Ronco C, Asicioglu E, Kahveci A, Nalcaci S, Arikan H, Tuglular S, Ozener C, Cavallini M, Centi A, Broccoli ML, Rocca AR, Testorio M, Borzacca B, Pugliese F, Russo GE, Tokgoz B, Ucar C, Kocyigit I, Somdas MA, Unal A, Vural A, Sipahioglu MH, Oymak O, Utas C, Teixeira L, Rodrigues A, Carvalho MJ, Cabrita A, Mendonca D, Micha T, Takouli L, Karaitianou A, Koupari G, Trompouki S, Arvanitis D, Vlassopoulos D, Ferreira AC, Fernandes V, Vila Lobos A, Nolasco F, Kahveci A, Nalcaci S, Asicioglu E, Birdal G, Arikan H, Tuglular S, Ozener C, Carvalho C, Beco A, Oliveira A, Santos C, Pestana M, Hiramatsu M, Ishida M, Tonozuka Y, Mikami H, Yamanari T, Momoki N, Onishi A, Maruyama K, Ito M, Masakane I, Takahashi T, Chung SH, Han DC, Noh H, Jeon JS, Kwon SH, Lindholm B, Lee HB, Tekeli L, Inal S, Derici U, Celik N, Kiran G, Derin O, Durunay M, Erten Y, Cho JH, Do JY, Park SH, Kim CD, Choi JY, Ryu HM, Kim YL, Kawahara K, Ishihara Y, Iwadou H, Uemura N, Kinashi M, Oobayashi S, Pilcevic D, Tadic-Pilcevic J, Kovacevic Z, Maksic D, Paunic Z, Mitrovic M, Mijuskovic M, Petrovic M. Peritoneal dialysis. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.54] [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: 11/13/2022] Open
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Lo CW, Liu X, Subramanian R, Tobita K, Tsuchya M, Kim A, Leatherubry L, Devine W, Kim Y, Anderton S, Wong L, Chang C, Ramirez R. High Throughput Congenital Heart Disease Phenotyping in Mice with Noninvasive Fetal Echocardiography. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.181.2] [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: 11/11/2022]
Affiliation(s)
| | - X Liu
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - R Subramanian
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - K Tobita
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - M Tsuchya
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - A Kim
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | | | - W Devine
- Children's Hospital of PittsburghPittsburghPA
| | - Y Kim
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - S Anderton
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - L Wong
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - C Chang
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
| | - R Ramirez
- Dept of Developmental BiologyUniversity of PittsburghPittsburghPA
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Weber M, Martin SS, Ramirez R, Fitzgerald J, Markert U. Kinetics of PIAS1/3 expression in early murine placenta. J Reprod Immunol 2010. [DOI: 10.1016/j.jri.2010.08.058] [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: 11/25/2022]
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Vega C, Conde MM, McBride C, Abascal JLF, Noya EG, Ramirez R, Sesé LM. Heat capacity of water: A signature of nuclear quantum effects. J Chem Phys 2010; 132:046101. [PMID: 20113070 DOI: 10.1063/1.3298879] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
In this note we present results for the heat capacity at constant pressure for the TIP4PQ/2005 model, as obtained from path-integral simulations. The model does a rather good job of describing both the heat capacity of ice I(h) and of liquid water. Classical simulations using the TIP4P/2005, TIP3P, TIP4P, TIP4P-Ew, simple point charge/extended, and TIP5P models are unable to reproduce the heat capacity of water. Given that classical simulations do not satisfy the third law of thermodynamics, one would expect such a failure at low temperatures. However, it seems that for water, nuclear quantum effects influence the heat capacities all the way up to room temperature. The failure of classical simulations to reproduce C(p) points to the necessity of incorporating nuclear quantum effects to describe this property accurately.
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Zorrilla B, Pires M, Lasheras L, Morant C, Seoane L, Sanchez LM, Galan I, Aguirre R, Ramirez R, Durban M. Intimate partner violence: last year prevalence and association with socio-economic factors among women in Madrid, Spain. Eur J Public Health 2009; 20:169-75. [DOI: 10.1093/eurpub/ckp143] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pauporte M, Maibach H, Lowe N, Pugliese M, Friedman DJ, Mendelsohn H, Cargill I, Ramirez R. Fluocinolone acetonide topical oil for scalp psoriasis. J DERMATOL TREAT 2009; 15:360-4. [PMID: 15764047 DOI: 10.1080/09546630410023566] [Citation(s) in RCA: 26] [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: 10/26/2022]
Abstract
Numerous preparations that are available for the treatment of psoriasis of the scalp contain high potency steroids, such as betamethasone dipropionate lotion or clobetasol propionate solution. Of special interest is a currently marketed oil preparation that contains the steroid fluocinolone acetonide (0.01%), classified as low potency (Class 6) steroid. Because the combination of emollients in the vehicle base are present to aid in softening the stratum corneum and allow penetration of the steroid component into the lower skin layer, it was thought this preparation would be an efficient treatment for psoriasis of the scalp. This study was designed to demonstrate the efficacy, tolerance and safety of fluocinolone acetonide 0.01% in oil, compared to its vehicle, for the treatment of scalp psoriasis. This was a randomized, double-blind, vehicle-controlled multi-center study in patients with moderate to severe scalp psoriasis. At the completion of the treatment period (21 days) all signs of psoriasis had improved in both treatment groups, the improvements in the FA group being significantly greater compared to those in the vehicle-treated group. The results of the physician global assessments of improvement in the signs of psoriasis from baseline confirmed the findings. Significantly more patients in the FA group had a good or better improvement from baseline compared to the number in the vehicle-treated group. The results of this study conclusively show that FA in an oil base that aids in the softening of the skin and allows penetration of the steroid into the stratum corneum, is an effective treatment for psoriasis of the scalp. This study also showed that the vehicle alone causes an improvement in the signs of psoriasis, but that the addition of 0.1% of the low potency steroid, fluocinolone acetonide, leads to a significantly better improvement.
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Affiliation(s)
- M Pauporte
- Department of Dermatology, University of California, San Francisco, Medical School, CA, USA
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Ramirez R, Chaumoître K, Michel F, Sabiani F, Merrot T. Occlusion intestinale de l’enfant par malrotation intestinale isolée. À propos de 11 cas. Arch Pediatr 2009; 16:99-105. [DOI: 10.1016/j.arcped.2008.11.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Revised: 10/06/2008] [Accepted: 11/01/2008] [Indexed: 11/29/2022]
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Ramirez R, Carracedo J, Merino A, Nogueras S, Alvarez-Lara MA, Rodríguez M, Martin-Malo A, Tetta C, Aljama P. Microinflammation induces endothelial damage in hemodialysis patients: the role of convective transport. Kidney Int 2007; 72:108-13. [PMID: 17429343 DOI: 10.1038/sj.ki.5002250] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [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: 11/10/2022]
Abstract
Cardiovascular complications are a major cause of mortality in hemodialysis patients. On-line hemofiltration combines convective clearance for removing large solutes with diffusion to remove small solutes and is associated with a significant reduction of inflammation and improved patient survival. We compared on-line hemofiltration to high-flux hemodialysis (HF-HD) in patients in a sequential manner. At baseline, 15 stable patients on HF-HD as compared with five control subjects showed significant increases in CD14+CD16+ cells, endothelial microparticles, and endothelial progenitor cells (EPCs). After 4 months of on-line hemofiltration, the number of CD14+CD16+ cells, microparticles, and EPCs decreased. After returning to HF-HD for 4 months, all measured parameters returned to their respective baseline values. The number of CD14+CD16+ cells correlated with both endothelial microparticles and EPCs. We conclude that on-line hemofiltration attenuates endothelial dysfunction possibly by decreasing microinflammation. This effect may be directly caused by a modulatory effect of on-line hemofiltration on proinflammatory cells or by a complex interaction that encompasses a wider removal of uremic toxins.
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Affiliation(s)
- R Ramirez
- Unidad de Investigación, Servicio de Nefrología, Hospital Universitario Reina Sofía Avda Menendez Pidal S/N, Córdoba 14004, Spain.
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