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Ribera-Perianes J, Vega M, Cases Moreno X, Cordón J, Cortés Gracia J, Paredes P, Sánchez-Izquierdo N, Perissinotti A, Fuster Pelfort D, Vidal-Sicart S. Multidisciplinary radio-guided surgery team: Alternative to change the current paradigm. Rev Esp Med Nucl Imagen Mol 2024; 43:91-99. [PMID: 38387785 DOI: 10.1016/j.remnie.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 12/02/2023] [Indexed: 02/24/2024]
Abstract
INTRODUCTION Given the constant increase in the healthcare demand for examinations related to radio-guided surgery (RGS), our hospital adopted new professional profiles in the RGS team, in order to partially reduce the time spent by nuclear medicine physicians on this task. AIM To analyze the process of incorporating the profiles of Diagnostic Imaging Technician (DIT) and Sentinel Node Referent Nurse (SNRN), evaluating their deployment in the procedures linked to the technique. MATERIAL AND METHODS Analysis of RGS activity during the period 2018-2022, focusing on pre-surgical and surgical procedures related to breast cancer (BC) and malignant melanoma (MM), as they are those pathologies on which the transfer of care competencies was concentrated. Chronological evolution of the competencies assumed by the different profiles during their integration into the RGS team. RESULTS RGS's healthcare activity during the analyzed period experienced an increase of 109%. BC and MM were the pathologies that accounted for by far the greatest demand for care. The transfer of competencies in these two pathologies occurred in a progressive and staggered manner, with 74% (460/622) of the administration phase being carried out by the SNRN and 64% (333/519) of the surgeries by the DIT in 2022. CONCLUSIONS The creation of a multidisciplinary RGS team that includes different professional profiles (nuclear medicine physician [MN], ERGC and TSID) is an effective strategy to respond to the increase in the complexity and number of all procedures related to RGS.
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Affiliation(s)
| | - M Vega
- Nuclear Medicine Department, Clínic Barcelona, Barcelona, Spain
| | - X Cases Moreno
- Nuclear Medicine Department, Clínic Barcelona, Barcelona, Spain
| | - J Cordón
- Nuclear Medicine Department, Clínic Barcelona, Barcelona, Spain
| | - J Cortés Gracia
- Nuclear Medicine Department, Clínic Barcelona, Barcelona, Spain
| | - P Paredes
- Nuclear Medicine Department, Clínic Barcelona, Barcelona, Spain
| | | | - A Perissinotti
- Nuclear Medicine Department, Clínic Barcelona, Biomedical Research Networking Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | | | - S Vidal-Sicart
- Nuclear Medicine Department, Clínic Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
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Fijas M, Vega M, Xie X, Kim M, Havranek T. SNAPPE-II and MDAS scores as predictors for surgical intervention in very low birth weight neonates with necrotizing enterocolitis. J Matern Fetal Neonatal Med 2023; 36:2148096. [PMID: 36404433 DOI: 10.1080/14767058.2022.2148096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Necrotizing enterocolitis (NEC) is the most common life-threatening gastrointestinal emergency in preterm and term neonates, with the majority of cases affecting neonates classified as very low birth weight (VLBW, bw <1500 g). Scores for neonatal acute physiology-perinatal extension-II (SNAPPE-II) and metabolic derangement acuity score (MDAS) have been developed and utilized to assess neonatal morbidity and mortality including the subset of VLBW neonates. Serial SNAPPE-II and MDAS scores have been reported in neonates with necrotizing enterocolitis to assist in surgical management, yielding mixed results. OBJECTIVE To determine the relationship between clinical and/or laboratory deterioration using SNAPPE-II and MDAS scores measured at the time of NEC diagnosis and surgical management of NEC. METHODS We retrospectively evaluated preterm neonates ≥23 weeks gestational age who developed pneumatosis intestinalis on radiographic imaging coupled with clinical signs of NEC. SNAPPE-II and MDAS scores were calculated within twelve hours of birth and within twelve hours of initial finding of pneumatosis intestinalis. Baseline characteristics and clinical variables between those who did and did not require surgical intervention were compared. Logistic regression and receiver - operator characteristics (ROC) curve analyses were also performed, and areas under the curve (AUC) computed, to assess the performance of SNAPPE-II and MDAS scoring systems to differentiate neonates with NEC in the two groups. RESULTS Sixty-four neonates were evaluated in our study of which 20 required surgical management of NEC. While the baseline SNAPPE-II and MDAS scores did not differ between the surgical management and medical management only groups, when rescored within 12 h of NEC diagnosis, the surgical management group had significantly higher SNAPPE -II (38 (18.5-69) vs. 19 (10-34.5), p = .04) and MDAS (2.5 (1-3) vs. 1 (0-2), p = .0004) scores. The AUCs for MDAS 0.77 (95% CI 0.65-0.89 and 0.71 (95% CI 0.57-0.85) for SNAPPE-II, indicating an acceptable level of diagnostic ability of both scoring systems to differentiate between those who did and did not need surgical management. CONCLUSION SNAPPE II and MDAS scores performed within 12 h of NEC diagnosis may be useful in predicting which preterm VLBW neonates will require surgical intervention.
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Affiliation(s)
- Melanie Fijas
- Department of Pediatrics, Albert Einstein College of Medicine/Montefiore, Bronx, NY, USA
| | - Melissa Vega
- Department of Pediatrics, Albert Einstein College of Medicine/Montefiore, Bronx, NY, USA
| | - Xianhong Xie
- Epidemiology & Population Health Department, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Mimi Kim
- Epidemiology & Population Health Department, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Tomas Havranek
- Department of Pediatrics, Albert Einstein College of Medicine/Montefiore, Bronx, NY, USA
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Vega M, Bryche JF, Karsenti PL, Gogol P, Canva M, Charette PG. Two-dimensional filtering in the Fourier domain of transient grating coherent artifacts in time-resolved spectroscopy. Anal Chim Acta 2023; 1279:341820. [PMID: 37827642 DOI: 10.1016/j.aca.2023.341820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/26/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
Removal of coherent artifacts is important in the analysis of time and wavelength resolved spectroscopy data. By taking advantage of the strong correlation between spectra acquired sequentially in time, artifact removal can be formulated as a 2D problem for improved effectiveness. This paper proposes a 2D method to remove transient grating coherent artifacts from femtosecond time-resolved spectroscopy data based on filtering in the Fourier domain, leading to better estimation of the material parameters from the measured data. The method is simple, intuitive, and light on computation resources. The effectiveness of the method is demonstrated with experimental data acquired from a bare gold film with and without coherent artifacts using mutually parallel and perpendicular pump/probe polarizations, as well as with more complex samples (nanostructured gold film on a glass substrate and rhodamine fluorophores in solution). The proposed method is expected to be applicable to coherent artifact removal in other types of time and wavelength-resolved spectroscopy data.
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Affiliation(s)
- M Vega
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau, France; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
| | - J-F Bryche
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada; Faculté des Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada.
| | - P-L Karsenti
- Faculté des Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - P Gogol
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Nanosciences et de Nanotechnologies, Université Paris-Saclay, CNRS, Palaiseau, France
| | - M Canva
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
| | - P G Charette
- Laboratoire Nanotechnologies Nanosystèmes (LN2), CNRS, Université de Sherbrooke, Sherbrooke, QC, Canada; Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada
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Obi MF, Sharma M, Reinberg MA, N'Dandu Z, Hyun Joon C, Vega M. The Implementation of Renal Denervation in the Management of Resistant Hypertension Despite Use of Multitherapy Antihypertensives at Maximally Tolerated Doses: A Contemporary Literature Review. Cureus 2023; 15:e41598. [PMID: 37559838 PMCID: PMC10409301 DOI: 10.7759/cureus.41598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2023] [Indexed: 08/11/2023] Open
Abstract
Refractory hypertension is highly prevalent among the hypertensive population, and current clinical management has failed to provide optimal control for these individuals. This subtype of arterial hypertension is defined as a persistently elevated systolic blood pressure reading of 140 mmHg, or higher, despite multiple antihypertensive use at maximally tolerated dosing. These patients have an elevated risk of cardiovascular and renal complications, urging for the need of more effective therapeutic management. Renal sympathetic efferent nerves have been noted to play an important role in volume and blood pressure homeostasis. Before the implementation of oral antihypertensives, the use of surgical lumbar sympathectomy for the reduction of persistent hypertension was considered a life-saving approach. However, individuals were left with debilitating side effects, such as postural hypotension, syncope, and impotence. A new and minimally invasive technique has been proposed, where the kidneys undergo selective denervation in hopes of providing decreased cardiovascular morbidity and mortality for patients with resistant hypertension. Some studies demonstrated promising outcomes with a reduction in blood pressure, a decrease in medication reliance, and a potential long-lasting effect of the procedure with an overall improvement in cardiovascular health. Unfortunately, most of the available data was obtained from observational, uncontrolled studies with short-term follow-up, small sample sizes, and high variability in blood pressure measurement. Therefore, further evidence is needed to determine whether renal denervation provides long-term benefits for blood pressure control and improves outcomes for mortality and cardiovascular events in this patient population.
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Affiliation(s)
- Mukosolu F Obi
- Internal Medicine, Wyckoff Heights Medical Center, Brooklyn, USA
| | - Manjari Sharma
- Internal Medicine, Wyckoff Heights Medical Center, Brooklyn, USA
| | | | - Zola N'Dandu
- Interventional Cardiology, Ochsner Medical Center, New Orleans, USA
| | - Cho Hyun Joon
- Internal Medicine, Wyckoff Heights Medical Center, Brooklyn, USA
| | - Melissa Vega
- Internal Medicine, Wyckoff Heights Medical Center, Brooklyn, USA
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Ahn JN, Hu D, Vega M. Changing pace: Using implementation intentions to enhance social distancing behavior during the COVID-19 pandemic. J Exp Psychol Appl 2021; 27:762-772. [PMID: 34424021 DOI: 10.1037/xap0000385] [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: 11/08/2022]
Abstract
Since the first case of COVID-19 in the U.S. on January 20, 2020, the disease caused by the new strain of coronavirus has spread exponentially across the country. While the spread of this disease can be significantly slowed if people practice "social distancing," it is difficult to break old habits and acquire new behaviors at the needed speed. The purpose of this study is to challenge how health risk messages are currently communicated (specifically by considering how the Center of Disease Control (CDC) communicates its recommendations for social distancing) and suggest an alternative way. We tested and applied the use of a robust behavioral intervention known as "if-then" plans (plans that spell out in advance how one wants to achieve a goal they have previously set) to encourage the acquisition of a new behavior (e.g., social distancing) during this time of crisis. Using a longitudinal mixed design (within-/between-subjects study) daily diary study, we hypothesized and observed (via multilevel modeling) that those randomized into the experimental group (those who created and practiced if-then plans) demonstrated increased social distancing over time, whereas engagement in social distancing did not change in the control condition (those who observed the CDC guidelines). These results were sustained in a 3-week follow-up examination for those who were strongly committed to the goal to social distance. Such evidence suggests that risk communication messaging that includes if-then plans is an effective way of acquiring new behaviors. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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Affiliation(s)
| | - Danfei Hu
- Department of Psychology, The Pennsylvania State University
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Salama M, Ataman-Millhouse L, Braham M, Berjeb K, Khrouf M, Rodrigues JK, Reis FM, Silva TC, Sánchez F, Romero S, Smitz J, Vásquez L, Vega M, Sobral F, Terrado G, Lombardi MG, Scarella A, Bourlon MT, Verduzco-Aguirre H, Sánchez AM, Adiga SK, Tholeti P, Udupa KS, Mahajan N, Patil M, Dalvi R, Venter C, Demetriou G, Geel J, Quintana R, Rodriguez G, Quintana T, Viale L, Fraguglia M, Coirini M, Remolina-Bonilla YA, Noguera JAR, Velásquez JC, Suarez A, Arango GD, Pineda JID, Aldecoa MDC, Javed M, Al Sufyan H, Daniels N, Oranye BC, Ogunmokun AA, Onwuzurigbo KI, Okereke CJ, Whesu TC, Woodruff TK. Installing oncofertility programs for common cancers in limited resource settings (Repro-Can-OPEN Study): An extrapolation during the global crisis of Coronavirus (COVID-19) pandemic. J Assist Reprod Genet 2020; 37:1567-1577. [PMID: 32594284 PMCID: PMC7320246 DOI: 10.1007/s10815-020-01821-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 05/10/2020] [Indexed: 02/06/2023] Open
Abstract
PURPOSE The state of limited resource settings that Coronavirus (COVID-19) pandemic has created globally should be taken seriously into account especially in healthcare sector. In oncofertility, patients should receive their fertility preservation treatments urgently even in limited resource settings before initiation of anticancer therapy. Therefore, it is very crucial to learn more about oncofertility practice in limited resource settings such as in developing countries that suffer often from shortage of healthcare services provided to young patients with cancer. METHODS As an extrapolation during the global crisis of COVID-19 pandemic, we surveyed oncofertility centers from 14 developing countries (Egypt, Tunisia, Brazil, Peru, Panama, Mexico, Colombia, Guatemala, Argentina, Chile, Nigeria, South Africa, Saudi Arabia, and India). Survey questionnaire included questions on the availability and degree of utilization of fertility preservation options in case of childhood cancer, breast cancer, and blood cancer. RESULTS All surveyed centers responded to all questions. Responses and their calculated oncofertility scores showed different domestic standards for oncofertility practice in case of childhood cancer, breast cancer, and blood cancer in the developing countries under limited resource settings. CONCLUSIONS Medical practice in limited resource settings has become a critical topic especially after the global crisis of COVID-19 pandemic. Understanding the resources necessary to provide oncofertility treatments is important until the current COVID-19 pandemic resolves. Lessons learned will be valuable to future potential worldwide disruptions due to infectious diseases or other global crises.
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Affiliation(s)
- M. Salama
- Oncofertility Consortium, Feinberg School of Medicine, Northwestern University, Chicago, Illinois USA
| | - L. Ataman-Millhouse
- Oncofertility Consortium, Feinberg School of Medicine, Northwestern University, Chicago, Illinois USA
| | - M. Braham
- Aziza Othmana Hospital of Tunis, Tunis, Tunisia
| | - K. Berjeb
- Aziza Othmana Hospital of Tunis, Tunis, Tunisia
| | - M. Khrouf
- FERTILLA, Clinique la Rose, Tunis, Tunisia
| | - J. K. Rodrigues
- Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - F. M. Reis
- Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - T. Cury- Silva
- Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais Brazil
| | - F. Sánchez
- Laboratorio de Biología Reproductiva y Preservación de la Fertilidad, Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - S. Romero
- Laboratorio de Biología Reproductiva y Preservación de la Fertilidad, Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - J. Smitz
- Laboratorio de Biología Reproductiva y Preservación de la Fertilidad, Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - L. Vásquez
- Unidad de Oncología Pediátrica, Hospital Edgardo Rebagliati Martins, Lima, Peru
| | - M. Vega
- Panama Fertility, Sistema Nacional de Investigadores, Panama City, Panama
| | - F. Sobral
- Pregna Medicina Reproductiva, Buenos Aires, Argentina
| | - G. Terrado
- Pregna Medicina Reproductiva, Buenos Aires, Argentina
| | | | - A. Scarella
- Centro de Reproduccion Humana, Facultad de Medicina, Universidad de Valparaiso, Valparaiso, Chile
| | - M. T. Bourlon
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - H. Verduzco-Aguirre
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - A. M. Sánchez
- Instituto Nacional de Perinatología Isidro Espinoza de los Reyes, Mexico City, Mexico
| | - S. K. Adiga
- Fertility Preservation Centre, Department of Clinical Embryology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - P. Tholeti
- Fertility Preservation Centre, Department of Clinical Embryology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - K. S. Udupa
- Department of Medical Oncology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - N. Mahajan
- Mother and Child Hospital, New Delhi, India
| | - M. Patil
- Dr. Patil’s Fertility and Endoscopy Clinic, Bangalore, India
| | - R. Dalvi
- Hospital Institute of Medical Sciences & SRCC children’s Hospital, Mumbai, India
| | - C. Venter
- Vitalab Fertility Centre, Johannesburg, South Africa
| | - G. Demetriou
- Department Medical Oncology, University of Witwatersrand, Johannesburg, South Africa
| | - J. Geel
- Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa
| | | | | | | | - L. Viale
- Procrearte, Buenos Aires, Argentina
| | | | - M. Coirini
- Hospital de Niños Victor J. Vilela. Rosario, Santa Fe, Argentina
| | | | | | | | - A. Suarez
- Instituto Nacional de Cancerología, Bogota, Colombia
| | | | - J. I. D. Pineda
- Instituto Guatemalteco de Seguridad Social (IGSS), Guatemala City, Guatemala
| | - M. D. C. Aldecoa
- Instituto Guatemalteco de Seguridad Social (IGSS), Guatemala City, Guatemala
| | - M. Javed
- Thuriah Medical Center, Riyadh, Kingdom of Saudi Arabia
| | - H. Al Sufyan
- Thuriah Medical Center, Riyadh, Kingdom of Saudi Arabia
| | - N. Daniels
- The Oncology and Fertility Centres of Ekocorp Plc, Eko Hospitals, Lagos, Nigeria
| | - B. C. Oranye
- The Oncology and Fertility Centres of Ekocorp Plc, Eko Hospitals, Lagos, Nigeria
| | - A. A. Ogunmokun
- The Oncology and Fertility Centres of Ekocorp Plc, Eko Hospitals, Lagos, Nigeria
| | | | | | - T. C. Whesu
- Kingswill Specialist Hospital, Lagos, Nigeria
| | - T. K. Woodruff
- Oncofertility Consortium, Feinberg School of Medicine, Northwestern University, Chicago, Illinois USA
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Hu D, Ahn JN, Vega M, Lin-Siegler X. Not All Scientists Are Equal: Role Aspirants Influence Role Modeling Outcomes in STEM. Basic and Applied Social Psychology 2020. [DOI: 10.1080/01973533.2020.1734006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Frana E, Bernardi S, Vega M, Marini P. UTERINE HEALTH AND ITS RELATIONSHIP WITH MINERAL PROFILE, HEMATOLOGY VALUES AND LEUCOCITARY FORM IN DAIRY COWS IN GRAZING SYSTEMS. SPERMOVA 2019. [DOI: 10.18548/aspe/0007.12] [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: 11/19/2022] Open
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Ahn JN, Hu D, Vega M. “Do as I do, not as I say”: Using social learning theory to unpack the impact of role models on students' outcomes in education. Soc Personal Psychol Compass 2019. [DOI: 10.1111/spc3.12517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Stroka J, Doncheva I, Spangenberg B, Bouten K, Braemer R, Caemmerer B, Dzido T, Grosse-Damhues J, Kemme J, Koch A, Kraus S, Morlock G, Schneider R, Schulz M, Vega M, Widmer V. Determination of Sucralose in Soft Drinks by High-Performance Thin-Layer Chromatography: Interlaboratory Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/92.4.1153] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
An interlaboratory comparison was carried out to evaluate the effectiveness of a method based on HPTLC in which reagent-free derivatization is followed by UV/fluorescence detection. The method was tested for the determination of sucralose (C12H19Cl3O8; (2R,3R,4R,5S,6R)-2- [(2R,3S,4S,5S)-2,5-bis(chloromethyl)-3,4-dihydroxyoxolan- 2-yl]oxy-5-chloro-6-hydroxymethyl)oxane-3, 4-diol; CAS Registry No. 56038-13-2) in carbonated and still beverages at the proposed European regulatory limits. For still beverages, a portion of the sample was diluted with methanolwater. For carbonated beverages, a portion of the sample was degassed in an ultrasonic bath before dilution. Turbid beverages were filtered after dilution through an HPLC syringe filter. The separation of sucralose was performed by direct application on amino-bonded (NH2) silica gel HPTLC plates (no cleanup needed) with the mobile phase acetonitrilewater. Sucralose was determined after reagent-free derivatization at 190C; it was quantified by measurements of both UV absorption and fluorescence. The samples, both spiked and containing sucralose, were sent to 14 laboratories in five different countries. Test portions of a sample found to contain no sucralose were spiked at levels of 30.5, 100.7, and 299 mg/L. Recoveries ranged from 104.3 to 124.6 and averaged 112 for determination by UV detection; recoveries ranged from 98.4 to 101.3 and averaged 99.9 for determination by fluorescence detection. On the basis of the results for spiked samples (blind duplicates at three levels), as well as sucralosecontaining samples (blind duplicates at three levels and one split level), the values for the RSDr ranged from 10.3 to 31.4 for determinations by UV detection and from 8.9 to 15.9 for determinations by fluorescence detection. The values for the RSDR values ranged from 13.5 to 31.4 for determinations by UV detection and from 8.9 to 20.7 for determinations by fluorescence detection.
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Affiliation(s)
- Joerg Stroka
- European CommissionJoint Research Centre, Institute for Reference Materials and Measurements, Food Safety and Quality Unit, Retieseweg 111, B-2440 Geel, Belgium
| | - Ivanka Doncheva
- European CommissionJoint Research Centre, Institute for Reference Materials and Measurements, Food Safety and Quality Unit, Retieseweg 111, B-2440 Geel, Belgium
| | - Bernd Spangenberg
- University of Applied Science Offenburg, Badstrasse 24, D-77652 Offenburg, Germany
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Herrera AM, Brand P, Cavada G, Koppmann A, Rivas M, Mackenney J, Sepúlveda H, Wevar ME, Cruzat L, Soto S, Pérez MA, León A, Contreras I, Alvarez C, Walker B, Flores C, Lezana V, Garrido C, Herrera ME, Rojas A, Andrades C, Chala E, Martínez RA, Vega M, Perillán JA, Seguel H, Przybyzsweski I. Treatment, outcomes and costs of asthma exacerbations in Chilean children: a prospective multicenter observational study. Allergol Immunopathol (Madr) 2019; 47:282-288. [PMID: 30595390 PMCID: PMC7125869 DOI: 10.1016/j.aller.2018.10.003] [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: 07/12/2018] [Revised: 10/02/2018] [Accepted: 10/08/2018] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To describe potential regional variations in therapies for severe asthma exacerbations in Chilean children and estimate the associated health expenditures. METHODS Observational prospective cohort study in 14 hospitals over a one-year period. Children five years of age or older were eligible for inclusion. Days with oxygen supply and pharmacological treatments received were recorded from the clinical chart. A basic asthma hospitalization basket was defined in order to estimate the average hospitalization cost for a single patient. Six months after discharge, new visits to the Emergency Room (ER), use of systemic corticosteroids and adherence to the controller treatment were evaluated. RESULTS 396 patients were enrolled. Patients from the public health system and from the north zone received significantly more days of oxygen, systemic corticosteroids and antibiotics. Great heterogeneity in antibiotic use among the participating hospitals was found, from 0 to 92.3% (ICC 0.34, 95% CI 0.16-0.52). The use of aminophylline, magnesium sulfate and ketamine varied from 0 to 36.4% between the different Pediatric Intensive Care Units (ICC 0.353, 95% CI 0.010-0.608). The average cost per inpatient was of $1910 USD. 290 patients (73.2%) completed the follow-up six months after discharge. 76 patients (26.2%) were not receiving any controller treatment and nearly a fourth had new ER visits and use of systemic corticosteroids due to new asthma exacerbations. CONCLUSIONS Considerable practice variation in asthma exacerbations treatment was found among the participating hospitals, highlighting the poor outcome of many patients after hospital discharge, with an important health cost.
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Affiliation(s)
- A M Herrera
- Santa María Clinic, Santa María 500, Santiago, Zip Code 7520378 Región Metropolitana, Chile; School of Medicine, Los Andes University, Monseñor Alvaro del Portillo 12455, Santiago, Zip Code 7620001 Región Metropolitana, Chile.
| | - P Brand
- Isala Women's and Children's Hospital, Zwolle, The Netherlands
| | - G Cavada
- School of Medicine, Finis Terrae University, Av Providencia 1509, Santiago, Zip Code 7501015 Región Metropolitana, Chile
| | - A Koppmann
- San Borja Arriarán Hospital, Av Santa Rosa 1234, Santiago, Zip Code 8360160 Región Metropolitana, Chile; School of Medicine, University of Chile, Chile
| | - M Rivas
- San Borja Arriarán Hospital, Av Santa Rosa 1234, Santiago, Zip Code 8360160 Región Metropolitana, Chile
| | - J Mackenney
- Roberto del Río Hospital, Av Profesor Zañartu 1085, Santiago, Zip Code 8380418 Región Metropolitana, Chile; School of Medicine, University of Chile, Chile
| | - H Sepúlveda
- Luis Calvo Mackenna Hospital, Av Antonio Varas 360, Santiago, Zip Code 7500539 Región Metropolitana, Chile
| | - M E Wevar
- Luis Calvo Mackenna Hospital, Av Antonio Varas 360, Santiago, Zip Code 7500539 Región Metropolitana, Chile
| | - L Cruzat
- Luis Calvo Mackenna Hospital, Av Antonio Varas 360, Santiago, Zip Code 7500539 Región Metropolitana, Chile
| | - S Soto
- Concepción Regional Hospital, San Martín 1436, Concepción, Zip Code 4070038 Región del Bío Bío, Chile
| | - M A Pérez
- Santa María Clinic, Santa María 500, Santiago, Zip Code 7520378 Región Metropolitana, Chile
| | - A León
- Santa María Clinic, Santa María 500, Santiago, Zip Code 7520378 Región Metropolitana, Chile
| | - I Contreras
- Padre Hurtado Hospital, Esperanza 2150, Santiago, Zip Code 8880465 Región Metropolitana, Chile
| | - C Alvarez
- Alemana Clinic, Av Vitacura 5951, Santiago, Zip Code 7650568 Región Metropolitana, Chile; School of Medicine, Desarrollo University, Av Las Condes 12496, Santiago, Zip Code 7590943 Región Metropolitana, Chile
| | - B Walker
- Alemana Clinic, Av Vitacura 5951, Santiago, Zip Code 7650568 Región Metropolitana, Chile; School of Medicine, Desarrollo University, Av Las Condes 12496, Santiago, Zip Code 7590943 Región Metropolitana, Chile
| | - C Flores
- Ovalle Hospital, Ariztía Pte. 7, Ovalle, Zip Code 1842054 Región de Coquimbo, Chile
| | - V Lezana
- Gustavo Fricke Hospital, Av Alvarez 1532, Viña del Mar, Zip Code 2570017 Región de Valparaíso, Chile
| | - C Garrido
- Gustavo Fricke Hospital, Av Alvarez 1532, Viña del Mar, Zip Code 2570017 Región de Valparaíso, Chile
| | - M E Herrera
- José Joaquín Aguirre Hospital, Santos Dumont 999, Santiago, Zip Code 8380456 Región Metropolitana, Chile
| | - A Rojas
- José Joaquín Aguirre Hospital, Santos Dumont 999, Santiago, Zip Code 8380456 Región Metropolitana, Chile
| | - C Andrades
- Valdivia Hospital, Coronel Santiago Bueras y Avaria 1003, Valdivia, Zip Code 5090146 Región de los Ríos, Chile
| | - E Chala
- Fusat Hospital, Carretera el Cobre Presidente Frei Montalva 1002, Zip Code 2820945 Rancagua, VI Región, Chile; School of Medicine, Los Andes University, Monseñor Alvaro del Portillo 12455, Santiago, Zip Code 7620001 Región Metropolitana, Chile
| | - R A Martínez
- Fusat Hospital, Carretera el Cobre Presidente Frei Montalva 1002, Zip Code 2820945 Rancagua, VI Región, Chile
| | - M Vega
- Leonardo Guzmán Hospital, Veintiuno de Mayo 1310, Zip Code 1271847 Antofagasta, Región de Antofagasta, Chile
| | - J A Perillán
- San Juan De Dios Hospital, Huérfanos 3255, Zip Code 8350488 Santiago, Región Metropolitana, Chile; School of Medicine, University of Chile, Chile
| | - H Seguel
- San Juan De Dios Hospital, Huérfanos 3255, Zip Code 8350488 Santiago, Región Metropolitana, Chile
| | - I Przybyzsweski
- San Juan De Dios Hospital, Huérfanos 3255, Zip Code 8350488 Santiago, Región Metropolitana, Chile
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Herrera A, Brand P, Cavada G, Koppmann A, Rivas M, Mackenney J, Sepúlveda H, Wevar M, Cruzat L, Soto S, Pérez M, León A, Contreras I, Alvarez C, Walker B, Flores C, Lezana V, Garrido C, Herrera M, Rojas A, Andrades C, Chala E, Martínez R, Vega M, Perillán J, Seguel H, Przybyzsweski I. Hospitalizations for asthma exacerbation in Chilean children: A multicenter observational study. Allergol Immunopathol (Madr) 2018; 46:533-538. [PMID: 29720350 DOI: 10.1016/j.aller.2018.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 02/06/2018] [Accepted: 02/22/2018] [Indexed: 11/24/2022]
Abstract
BACKGROUND Asthma hospitalization rates in Chilean children have increased in the last 14 years, but little is known about the factors associated with this. OBJECTIVE Describe clinical characteristics of children hospitalized for asthma exacerbation. METHODS Observational prospective cohort study in 14 hospitals. Over a one-year period, children five years of age or older hospitalized with asthma exacerbation were eligible for inclusion. Parents completed an online questionnaire with questions on demographic information, about asthma, indoor environmental contaminant exposure, comorbidities and beliefs about disease and treatment. Disease control was assessed by the Asthma Control Test. Inhalation technique was observed using a checklist. RESULTS 396 patients were enrolled. 168 children did not have an established diagnosis of asthma. Only 188 used at least one controller treatment at the time of hospitalization. 208 parents said they believed their child had asthma only when they had an exacerbation and 97 correctly identified inhaled corticosteroids as anti-inflammatory treatment. 342 patients used the wrong spacer and 73 correctly performed all steps of the checklist. CONCLUSIONS Almost half of the patients were not diagnosed with asthma at the time of hospitalization despite having a medical history suggestive of the disease. In the remaining patients with an established diagnosis of asthma potentially modifiable factors like bad adherence to treatment and poor inhalation technique were found. Implementing a nationwide asthma program including continued medical education for the correct diagnosis and follow up of these patients and asthma education for patients and caregivers is needed to reduce asthma hospitalization rates in Chilean children.
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Garrido M, Hernández A, Saldaña C, Vega M, Carmen R. PO-026 Metformin inhibits the NGF-induced increase c-MYC and VEGF levels in ovarian cancer cells. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Romero C, Lobos L, Hurtado I, Vera C, Gallegos I, Chnaiderman J, Vega M, Selman A, Gayan P. PO-321 MicroRNA-145 and COX2 levels are regulated by nerve growth factor (NGF) in epithelial ovarian cancer. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.834] [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] Open
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Velazquez DM, Reidy KJ, Sharma M, Kim M, Vega M, Havranek T. The effect of hemodynamically significant patent ductus arteriosus on acute kidney injury and systemic hypertension in extremely low gestational age newborns. J Matern Fetal Neonatal Med 2018; 32:3209-3214. [PMID: 29642731 DOI: 10.1080/14767058.2018.1460349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background: Acute kidney injury (AKI) in preterm neonates is becoming an increasingly recognized morbidity in the neonatal intensive care unit neonatal intensive care unit (NICU), yet its epidemiology, delineation and relation to numerous toxic exposures and common morbidities such as systemic hypertension is just evolving. With a frequency of the patent ductus arteriosus (PDA) as high as 70% in preterm infants born before 28-week gestation, the role of the hemodynamically significant PDA (hs-PDA) remains unclear. Objective: To determine if AKI and systemic hypertension is more common in extremely low gestational age newborns (ELGAN) with hs PDA compared to ELGAN with no or non-hs PDA using modified AKIN and Neonatal Risk, Injury, Failure, Loss of Kidney Function, and End-stage (N-RIFLE) scoring systems. Methods: This was a retrospective cohort study of infants ≤28 weeks gestational age born between 2010 and 2016 who had echocardiographic PDA evaluation completed for hemodynamical significance as well as serial serum creatinine and urine output measurement documented, needed for the two AKI scoring systems: modified AKIN (based on serial serum creatinine) and N-RIFLE (using urine output data). Blood pressure measurements and therapy were evaluated during the hospitalization and on the day of NICU discharge. Baseline characteristics and outcome variables were compared between the hs-PDA and no or non-hs PDA using unpaired t-tests for continuous variables and chi square tests for categorical data. Results: One hundred fifty-one infants were eligible of which 110 had hs-PDA. Infants with hs-PDA were smaller (777 versus 867 g, p = .026), less mature (25.8 versus 26.4 weeks, p = .023) and had greater exposure to nephrotoxic drugs (14 versus 9.4 days, p = .001). Other clinical and demographic variables were similar between the two groups. The overall incidence of AKI was not different between the hs-PDA and no PDA or non-hs PDA groups when evaluated by the acute kidney injury network (AKIN) or N-RIFLE staging; however, preterm newborns with hs-PDA demonstrated a trend towards increased risk of AKI injury (12.7 versus 0.02%, p = .06). The N-RIFLE and AKIN scoring systems demonstrated very poor degree of agreement (kappa = 0.00853) in our study. There was no difference in the rates of hypertension during the hospitalization as well as on the day of NICU discharge. Conclusion: Preterm neonates with hs-PDA had similar rates of AKI and hypertension as neonates with no or non-hs PDA.
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Affiliation(s)
- Danitza M Velazquez
- a Division of Neonatal-Perinatal Medicine , Bristol-Myers Squibb Children's Hospital, Robert Wood Johnson Medical School , New Brunswick , NJ , USA
| | - Kimberly J Reidy
- b Division of Pediatric Nephrology , The Children's Hospital at Montefiore, Albert Einstein College of Medicine , Bronx , NY , USA
| | - Madhu Sharma
- c Division of Pediatric Cardiology , The Children's Hospital at Montefiore, Albert Einstein College of Medicine , Bronx , NY , USA
| | - Mimi Kim
- d Department of Epidemiology & Population Health, Division of Biostatistics , Albert Einstein College of Medicine , Bronx , NY , USA
| | - Melissa Vega
- e Division of Neonatal-Perinatal Medicine , The Children's Hospital at Montefiore, Albert Einstein College of Medicine , Bronx , NY , USA
| | - Tomas Havranek
- e Division of Neonatal-Perinatal Medicine , The Children's Hospital at Montefiore, Albert Einstein College of Medicine , Bronx , NY , USA
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Bruno CJ, Bengani S, Gomes WA, Brewer M, Vega M, Xie X, Kim M, Fuloria M. MRI Differences Associated with Intrauterine Growth Restriction in Preterm Infants. Neonatology 2017; 111:317-323. [PMID: 28076856 DOI: 10.1159/000453576] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 08/16/2016] [Accepted: 11/18/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND Preterm infants are at risk for neurodevelopmental impairment. Intrauterine growth restriction (IUGR) further increases this risk. Brain imaging studies are often utilized at or near term-equivalent age to determine later prognosis. OBJECTIVE To evaluate the association between intrauterine growth and regional brain volume on MRI scans performed in preterm infants at or near term-equivalent age. METHODS This is a retrospective case-control study of 24 infants born at gestational age ≤30 weeks and cared for in a large, inner-city, academic neonatal intensive-care unit from 2012 to 2013. Each IUGR infant was matched with 1-2 appropriate for gestational age (AGA) infants who served as controls. Predischarge MRI scans routinely obtained at ≥36 weeks' adjusted age were analyzed for regional brain volumetric differences. We examined the association between IUGR and thalamic, basal ganglion, and cerebellar brain volumes in these preterm infants. RESULTS Compared to AGA infants, IUGR infants had a smaller thalamus (7.88 vs. 5.87 mL, p = 0.001) and basal ganglion (8.87 vs. 6.92 mL, p = 0.002) volumes. There was no difference in cerebellar volumes between the two study groups. Linear regression analyses revealed similar trends in the associations between IUGR and brain volumes after adjusting for sex, gestational age at birth, and postconceptual age and weight at MRI. CONCLUSIONS Thalamus and basal ganglion volumes are reduced in growth-restricted preterm infants. These differences may preferentially impact neurodevelopmental outcomes. Further research is needed to explore these relationships.
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Affiliation(s)
- Christie J Bruno
- Department of Pediatrics, Yale University School of Medicine, New Haven, CT, USA
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Vega M, Alemany P, Martin IR, Llanos J. Structural properties, Judd–Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm. RSC Adv 2017. [DOI: 10.1039/c6ra28725e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structural and up-conversion properties of BaTiO3 phosphors doped with Er3+/Yb3+ have been studied.
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Affiliation(s)
- M. Vega
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago
- Chile
| | - P. Alemany
- Departament de Ciència de Materials i Química Física
- Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - I. R. Martin
- Departamento de Física
- Instituto de Materiales y Nanotecnología (IMN)
- Universidad de La Laguna
- Tenerife
- Spain
| | - J. Llanos
- Departamento de Química
- Universidad Católica del Norte
- Antofagasta
- Chile
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Ahamed MF, Dar P, Vega M, Kim M, Gao Q, Havranek T. Early feeding tolerance in small for gestational age infants with normal versus abnormal antenatal Doppler characteristics. J Neonatal Perinatal Med 2017; 10:43-48. [PMID: 28304325 DOI: 10.3233/npm-1682] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVES To determine differences in feeding tolerance amongst preterm small for gestational age (SGA) infants with normal versus abnormal umbilical artery Doppler flow defined as absent or reversed end diastolic flow (AREDF). METHODS This was a retrospective cohort study of infants <35 weeks gestational age (GA) and birth weight (BW) <10th percentile. Day of initiation of feeds, days to full feeds and CRIB II scores were the primary outcomes. Clinical characteristics were compared between the groups of SGA infants with normal and AREDF. Multivariable regression models were fit to the data to adjust for potential confounders of the association of AREDF and feeding intolerance. RESULTS 120 infants with normal and 64 infants with AREDF were included. The infants with AREDF were smaller (971 g vs. 1183 g, p = 0.0002), less mature (29.9 wks vs. 31.2 wks, p = 0.0009), had higher CRIB II score (7.2 vs. 5.2, p = 0.0033), started feeding later (4.1 days vs. 3.3 days, p = 0.020) and advanced slower to full feeds (17.7 days vs. 13.7 days, p = 0.0017). Necrotizing enterocolitis was similar between the groups (p = 0.18). After adjusting for confounders, Doppler flow was no longer a significant predictor of the initiation (p = 0.37) and advancement of feeds (p = 0.44). CONCLUSIONS Infants with AREDF are sicker at birth and have more feeding difficulties; after adjusting for BW and GA, Doppler flow was no longer a significant predictor of feeding intolerance.
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Affiliation(s)
- M F Ahamed
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Southern Illinois University School of Medicine, IL, USA
| | - Pe'er Dar
- Department of Obstetrics and Gynecology and Women's Health, Division of Fetal Medicine and OBGYN Ultrasound, Montefiore Medical Center, Albert Einstein College of Medicine, NY, USA
| | - M Vega
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, NY, USA
| | - Mimi Kim
- Department of Epidemiology & Population Health, Division of Biostatistics, Albert Einstein College of Medicine, NY, USA
| | - Q Gao
- Department of Epidemiology & Population Health, Division of Biostatistics, Albert Einstein College of Medicine, NY, USA
| | - T Havranek
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, NY, USA
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Cortés-Adasme E, Vega M, Martin IR, Llanos J. Synthesis and characterization of SrSnO3 doped with Er3+ for up-conversion luminescence temperature sensors. RSC Adv 2017. [DOI: 10.1039/c7ra08603b] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present work shows the results of the synthesis of SrSnO3:Er3+ (doped from 0% to 7% with Er3+) prepared using a sol–gel method.
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Affiliation(s)
- E. Cortés-Adasme
- Departamento de Química
- Universidad Católica del Norte
- Antofagasta
- Chile
| | - M. Vega
- Departamento de Química
- Universidad Católica del Norte
- Antofagasta
- Chile
- Departamento de Química
| | - I. R. Martin
- Departamento de Física
- Instituto de Materiales y Nanotecnología (IMN)
- Universidad de La Laguna
- Tenerife
- Spain
| | - J. Llanos
- Departamento de Química
- Universidad Católica del Norte
- Antofagasta
- Chile
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Romero C, Hurtado I, Garrido M, Selman A, Vega M. The expression of cyclooxygenase-2 is increased by nerve growth factor in epithelial ovarian cancer. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61162-0] [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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Abstract
Hyperandrogenemia, hyperinsulinemia, and obesity affect 60-70% of patients with Polycystic Ovarian Syndrome (PCOS), who exhibit an altered endometrial insulin signaling. The aim of the study was to evaluate whether hyperandrogenism, hyperinsulinism, and obesity present in PCOS patients impair the endometrial adiponectin signaling pathway. The ex vivo study was conducted on 27 samples from lean (n=9), obese (n=9), and obese-PCOS (n=9) patients. The in vitro assays were performed in immortalized human endometrial stromal cells stimulated with testosterone, insulin, or testosterone plus insulin. Serum steroid-hormones, adiponectin, glucose, and insulin; body mass index, free androgen index, ISI-Composite, and HOMA were evaluated in the 3 groups. Ex vivo and in vitro gene expression and protein content of adiponectin, AdipoR1, AdipoR2, and APPL1 were determined. Adiponectin serum levels were decreased in obese-PCOS patients compared to lean (78%) and obese (54%) controls (p<0.05). AdipoR1 protein and gene expression were increased in obese group vs. obese-PCOS and lean groups (2-fold, p<0.05). In turn, AdipoR2 protein and mRNA content was similar between the 3 groups. APPL1 protein levels were reduced in endometria from both obese groups, compared to lean group (6-fold, p<0.05). Testosterone plus insulin stimulation of T-HESC and St-T1b leads to a reduction of adiponectin, AdipoR1, AdipoR2, and APPL1 protein content in both endometrial cell lines (p<0.05), whereas, in the presence of testosterone or insulin alone, protein levels were similar to basal. Therefore, endometrial adiponectin-signaling pathway is impaired in hyperandrogenemic and hyperinsulinemic obese-PCOS patients, corroborated in the in vitro model, which could affect endometrial function and potentially the implantation process.
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Affiliation(s)
- V García
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - L Oróstica
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Poblete
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Rosas
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - I Astorga
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Romero
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - M Vega
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
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Bruno CJ, Angert R, Rosen O, Lee C, Vega M, Kim M, Yu Y, Bernstein PS, Goffman D. Simulation as a tool for improving acquisition of neonatal resuscitation skills for obstetric residents. J Matern Fetal Neonatal Med 2015; 29:2625-9. [PMID: 26456348 DOI: 10.3109/14767058.2015.1095179] [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] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Our goal was to compare the confidence, knowledge, and performance of obstetric residents taught initial neonatal resuscitation steps in a simulation-based versus lecture-based format. METHODS Our study was a prospective randomized controlled trial of 33 obstetric residents. Baseline confidence, knowledge, and clinical skills assessments were performed. Subjects were randomized to traditional lecture (n = 14) or simulation-based (n = 19) neonatal resuscitation curriculum with a focus on initial steps. Follow-up assessments were performed at 3 and 6 months. Total confidence, knowledge, and clinical performance scores and change from baseline in these scores were calculated and compared between groups. RESULTS Both the lecture-based and simulated-based groups demonstrated significant improvement in confidence, knowledge, and performance over time. However, compared with the lecture group, the magnitude of the mean change from baseline in performance scores was significantly greater in the simulation group at 3 months (2.9 versus 10.1; p < 0.001), but not at 6 months (7.0 versus 9.3; p = 0.11). CONCLUSIONS Our study demonstrates the superiority of simulation in teaching obstetric residents initial neonatal resuscitation steps compared with a traditional lecture format. Skills are retained for upwards of 3-6 months. Refresher instruction by 6 months post-instruction may be beneficial.
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Affiliation(s)
- C J Bruno
- a Department of Pediatrics , Albert Einstein College of Medicine/the Children's Hospital at Montefiore , Bronx , NY , USA
| | - R Angert
- a Department of Pediatrics , Albert Einstein College of Medicine/the Children's Hospital at Montefiore , Bronx , NY , USA
| | - O Rosen
- a Department of Pediatrics , Albert Einstein College of Medicine/the Children's Hospital at Montefiore , Bronx , NY , USA
| | - C Lee
- b Department of Clinical Obstetrics & Gynecology and Women's Health , Albert Einstein College of Medicine/Montefiore Medical Center , Bronx , NY , USA , and
| | - M Vega
- a Department of Pediatrics , Albert Einstein College of Medicine/the Children's Hospital at Montefiore , Bronx , NY , USA
| | - M Kim
- c Department of Epidemiology & Population Health , Albert Einstein College of Medicine , Bronx , NY , USA
| | - Y Yu
- c Department of Epidemiology & Population Health , Albert Einstein College of Medicine , Bronx , NY , USA
| | - P S Bernstein
- b Department of Clinical Obstetrics & Gynecology and Women's Health , Albert Einstein College of Medicine/Montefiore Medical Center , Bronx , NY , USA , and
| | - D Goffman
- b Department of Clinical Obstetrics & Gynecology and Women's Health , Albert Einstein College of Medicine/Montefiore Medical Center , Bronx , NY , USA , and
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Ahamed MF, Verma P, Lee S, Vega M, Wang D, Kim M, Fuloria M. Predictors of successful closure of patent ductus arteriosus with indomethacin. J Perinatol 2015; 35:729-34. [PMID: 25856764 DOI: 10.1038/jp.2015.33] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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] [Received: 12/04/2014] [Revised: 02/11/2015] [Accepted: 03/02/2015] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To determine whether platelet counts can predict the likelihood of successful closure of patent ductus arteriosus (PDA) with indomethacin. STUDY DESIGN This was a retrospective cohort study of infants <32 weeks' gestational age (GA) and birth weight <1500 g with PDA. Clinical characteristics between infants who achieved ductal closure with indomethacin and those who failed were compared. Multivariable logistic regression was used to identify predictors of successful ductal closure. RESULTS In infants with hemodynamically significant PDA, older GA (odds ratio=1.54; 95% confidence interval: 1.12 to 2.13), male gender (odds ratio=3.02; 95% confidence interval: 1.08 to 8.49) and higher platelet count (odds ratio=1.5; 95% confidence interval: 1.04 to 2.17) prior to indomethacin treatment were associated with successful ductal closure with indomethacin. CONCLUSION Older GA, male gender and higher platelet count at time of treatment of hemodynamically significant PDA are predictors of successful ductal closure with indomethacin.
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Affiliation(s)
- M F Ahamed
- Division of Neonatal-Perinatal Medicine, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| | - P Verma
- Division of Neonatology, Alpert Medical School of Brown University, Providence, RI, USA
| | - S Lee
- Division of Pediatric Cardiology, Mount Sinai Hospital, Icahn School of Medicine, New York, NY, USA
| | - M Vega
- Division of Neonatal-Perinatal Medicine, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| | - D Wang
- Department of Epidemiology & Population Health, Division of Biostatistics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - M Kim
- Department of Epidemiology & Population Health, Division of Biostatistics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - M Fuloria
- Division of Neonatal-Perinatal Medicine, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
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Bruno CJ, Meerkov M, Capone C, Vega M, Sutton N, Kim M, Wang D, Fuloria M. CRIB scores as a tool for assessing risk for the development of pulmonary hypertension in extremely preterm infants with bronchopulmonary dysplasia. Am J Perinatol 2015; 32:1031-7. [PMID: 26368789 DOI: 10.1055/s-0035-1547324] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 10/23/2022]
Abstract
OBJECTIVE Bronchopulmonary dysplasia (BPD) increases the risk for developing pulmonary hypertension (PH). However, the risk factors associated with BPD-associated PH remain unclear. Our primary aim was to determine perinatal risk factors associated with the development of PH in infants with BPD. STUDY DESIGN We retrospectively reviewed medical records of 303 infants born at ≤ 28 weeks' gestation. Infants were categorized as having no, mild, moderate, or severe BPD. PH was diagnosed by echocardiogram. Data were analyzed using Fisher exact test, two-sample t-test, and multivariable logistic regression. RESULTS The incidence of PH in our cohort was 12%. Infants with PH had lower birth weights and gestational ages (p < 0.001). After controlling for confounding variables, severe BPD (p < 0.001), and higher Clinical Risk Index for Babies (CRIB) scores (p = 0.04) were associated with the development of PH. CONCLUSION Severe BPD increases the risk for developing PH. Higher CRIB scores correlate with PH development in infants with BPD. We speculate that CRIB scores may allow for early categorization of preterm infants with a higher likelihood of developing PH.
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Affiliation(s)
- Christie J Bruno
- Division of Neonatology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, New York
| | - Meera Meerkov
- Department of Pediatrics, The Children's Hospital at Montefiore, Bronx, New York
| | - Christine Capone
- Division of Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Bronx, New York
| | - Melissa Vega
- Division of Neonatology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, New York
| | - Nicole Sutton
- Division of Cardiology, Department of Pediatrics, The Children's Hospital at Montefiore, Bronx, New York
| | - Mimi Kim
- Division of Biostatistics, Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York
| | - Dan Wang
- Division of Biostatistics, Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York
| | - Mamta Fuloria
- Division of Neonatology, Department of Pediatrics, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, New York
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Bacallao K, Plaza-Parrochia F, Cerda A, Gabler F, Romero C, Vantman D, Vega M. Levels of Regulatory Proteins Associated With Cell Proliferation in Endometria From Untreated Patients Having Polycystic Ovarian Syndrome With and Without Endometrial Hyperplasia. Reprod Sci 2015; 23:211-8. [DOI: 10.1177/1933719115597762] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- K. Bacallao
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - F. Plaza-Parrochia
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
| | - A. Cerda
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
| | - F. Gabler
- Department of Pathology, School of Medicine, University of Chile, San Borja Arriarán Clinical Hospital, Santiago, Chile
| | - C. Romero
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
| | - D. Vantman
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
| | - M. Vega
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile Clinical Hospital, Santiago, Chile
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Geffrey A, Vega M, Armacost M, Millett D, Shaw Huang S, Jimenez N, Liu C, Smith J. C-61 * Quality of Life of Underserved Hispanics with Intractable Epilepsy Improves One Year after Surgical Intervention. Arch Clin Neuropsychol 2014. [DOI: 10.1093/arclin/acu038.242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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27
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Nezhat F, Kolev T, Vetere P, Radjabi A, Averbuch L, Vega M, Khalil S, Altinbas S. Comparison of perioperative outcomes and complication rates between conventional versus robotic-assisted laparoscopy in the evaluation and management of early, advanced stage and recurrent ovarian, fallopian tube and primary peritoneal cancer. Gynecol Oncol 2014. [DOI: 10.1016/j.ygyno.2014.03.523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Castrillejo Y, Vega A, Vega M, Hernández P, Rodriguez J, Barrado E. Electrochemical formation of Sc-Al intermetallic compounds in the eutectic LiCl-KCl. Determination of thermodynamic properties. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.163] [Citation(s) in RCA: 35] [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: 11/27/2022]
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29
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Muñoz K, Blaszkewicz M, Campos V, Vega M, Degen GH. Exposure of infants to ochratoxin A with breast milk. Arch Toxicol 2013; 88:837-46. [DOI: 10.1007/s00204-013-1168-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 11/13/2013] [Indexed: 10/26/2022]
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30
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Vega M, Breborowicz A, Morris S, Sirota I, Gonzales E, Keltz M. Peak estradiol (e2) at the time of hcg trigger as a predictor of small for gestational age (SGA). Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.944] [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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31
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Sauerbrun-Cutler MT, Ozensoy S, Vega M, Keltz M. Does PICSI offer an advantage over ICSI in art for patients with male factor. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.238] [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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32
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Breborowicz A, Vega M, Sauerbrun M, Sirota I, Stein D, Keltz M. Euploid embryos following day 3 biopsy for comparative genomic hybridization (CGH) have excellent outcomes even with no advanced blastocysts. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.1359] [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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33
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Vega M, Breborowicz A, Sauerbrun M, Sirota I, Gonzales E, Keltz M. Pregestational genetic screening (PGS) at the cleavage stage. How much damage is the biopsy causing? Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.1365] [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: 11/26/2022]
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Abstract
Polycystic ovary syndrome (PCOS) is a common hyperandrogenic disorder associated with insulin resistance. Insulin exerts its metabolic function by activating the PI3K/Akt pathway and favoring glucose uptake. Caveolin-1 is a scaffolding protein which increases insulin receptor (IR) stability. Alternatively, activation of IR increases caveolin-1 phosphorylation on tyrosine-14. Furthermore, endometrial tissue from PCOS patients is proposed to be insulin resistant; however, the particular role of testosterone in modulating the metabolic effects of insulin remains unexplored in endometrial stromal cells. To evaluate whether androgens modulate the response to insulin, T-HESCs cells were stimulated with 100 nM testosterone for 24 h and changes in the protein levels of caveolin-1, IR, and Akt were determined by Western blotting (WB). After testosterone treatment, the consequences of acute insulin stimulation were evaluated by WB analysis of phospho-S473Akt and phospho-Y14Caveolin-1, as well as by measuring glucose incorporation analyzing 2-deoxyglucose (2-DOG) uptake. For cells pretreated with testosterone, higher IR, IRS-1, and caveolin-1 protein levels compared with control conditions were detected. However, in testosterone treated cells acute insulin stimulation did not increase phospho-S473Akt and phospho-Y14caveolin-1 levels and reduced 2-DOG uptake was observed compared to control cells. Our results suggest that testosterone may have a detrimental role on the metabolic effects of insulin in endometrial stromal cell cultures. Thus, the high androgen levels in patients with PCOS may favor insulin resistance observed in endometria from these women.
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Affiliation(s)
- P Ormazabal
- Department of Preclinical Sciences, Catholic University of Maule, Talca, Chile
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35
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Vega M, Keltz M, Breborowicz A, Fiorentino F, Rienzi L, Bono S, Capalbo A, Spizzichino L, Baroni E, Harton G, Biricik A, Ubaldi FM, Ghevaria H, Mamas T, Sabhnani T, Sarna U, Serhal P, Delhanty JDA, Alfarawati S, Spath K, Colls P, Wells D, Fragouli E, Morin S, Melzer K, Grifo J, Colls P, Zheng Z, Munne S, Mir P, Rodrigo L, Mateu E, Peinado V, Milan-Sanchez M, Al-Asmar N, Garcia-Herrero S, Campos-Galindo I, Mercader A, Poo ME, Simon C, Rubio C. Session 31: PGD/PGS. Hum Reprod 2013. [DOI: 10.1093/humrep/det164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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36
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Castrillejo Y, de la Fuente C, Vega M, de la Rosa F, Pardo R, Barrado E. Cathodic behaviour and oxoacidity reactions of samarium (III) in two molten chlorides with different acidity properties: The eutectic LiCl–KCl and the equimolar CaCl2–NaCl melt. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.02.115] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Ormazabal P, Romero C, Gabler F, Quest AFG, Vega M. Decreased phosphorylation of Y¹⁴caveolin-1 in endometrial tissue of polycystic ovary syndrome patients may be related with an insulin resistant state in this tissue. Horm Metab Res 2013; 45:291-6. [PMID: 23225242 DOI: 10.1055/s-0032-1329972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Endometrial tissue of patients with polycystic ovary syndrome (PCOS) shows an impaired expression of insulin signaling molecules. Tyrosine phosphorylation of the insulin receptor (IR) by insulin promotes glucose uptake by activating the PI3K/Akt pathway. IR stability and function depend on the presence of the protein caveolin-1. Activation of IR increases phosphorylation of Y¹⁴caveolin-1. Since the endometrium of PCOS patients is proposed to be insulin resistant, we evaluated the phosphorylation of IR and caveolin-1 in endometria of patients with insulin resistance (PCOSE-IR) compared to controls (CE). To explore the mechanism associated with this condition, cultured endometrial cells (T-HESC) were exposed to high glucose (25 mM, 24 h), an experimental condition that leads to insulin resistance in other cell types. Endometrial protein levels of phospho-Y⁹⁷²IR, phospho-Y¹⁴caveolin-1 and caveolin-1 were determined by Western blotting. In cultured cells, protein levels of caveolin-1, IR, and Akt were evaluated by Western blotting. After acute insulin stimulation, phospho-S⁴⁷³Akt, phospho-Y¹⁴caveolin-1, and 2-deoxyglucose (2-DOG) uptake were determined. PCOSE-IR samples showed high protein levels of caveolin-1, but reduced phospho-Y¹⁴caveolin-1 compared to CE. No differences were observed for phospho-Y⁹⁷²IR between both groups. Cells pretreated with glucose showed a reduction in protein levels of IR and caveolin-1 and were unable to increase 2-DOG uptake, phospho-S⁴⁷³Akt and phospho-Y¹⁴caveolin-1 after insulin stimulation. In conclusion, in PCOSE-IR the impaired phosphorylation of IR downstream molecules such as phospho-Y¹⁴caveolin-1 suggests a diminished insulin sensitivity in endometria, condition that could be supported in vitro by the ability of T-HESCs to become insulin resistant when they are exposed to high glucose.
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Affiliation(s)
- P Ormazabal
- Department of Preclinical Sciences, School of Medicine, Catholic University of Maule, Talca, Chile
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38
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Abstract
Due to its ability to induce vascular endothelial growth factor expression and proliferation, migration, and vasculogenesis of endothelial cells, nerve growth factor (NGF) has been considered as an angiogenic factor in epithelial ovarian cancer (EOC). In this work, we evaluated the angiogenic and proliferative mRNA expression profiles of EOC and addressed the responsiveness of EOC explants to NGF stimulation. Twenty EOC samples were obtained from Obstetrics and Gynecology Department, University of Chile's Clinical Hospital. Global gene expression profiles of selected poorly differentiated serous EOC samples were obtained with DNA oligonucleotide microarrays. In addition, EOC explants were subjected to NGF stimulation and levels of p-AKT, BAX, BCL2, Ki-67, c-MYC, and FOXL2 proteins were determined by immunohistochemistry. Results showed that mRNAs coding for specific transcriptional regulators and antiapoptotic components of the NGF signaling pathway were upregulated in EOC cells. At the protein level, key members of the NGF pathway including p-AKT, BCL2/BAX, Ki-67, and c-MYC were found increased, while FOXL2 was decreased in response to NGF stimulation. These findings strongly suggest that NGF stimulates cellular proliferation of human EOC.
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Affiliation(s)
- U Urzua
- Programa de Biología Celular y Molecular, ICBM, Santiago, Chile
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39
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Vega M, Martin K, Sirota I, Gonzales E, Stein D. Preimplantation genetic screening (PGS) using comparative genomic hybridization (CGH) on day 3 embryo biopsies doubles the implantation, clinical pregnancy and ongoing pregnancy rate per transfer. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.1152] [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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40
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Vera C, Tapia V, Kohan K, Gabler F, Ferreira A, Selman A, Vega M, Romero C. Nerve growth factor induces the expression of chaperone protein calreticulin in human epithelial ovarian cells. Horm Metab Res 2012; 44:639-43. [PMID: 22773372 DOI: 10.1055/s-0032-1311633] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Epithelial ovarian cancer is highly angiogenic and high expression of Nerve Growth Factor (NGF), a proangiogenic protein. Calreticulin is a multifunctional protein with anti-angiogenic properties and its translocation to the tumor cell membrane promotes recognition and engulfment by dendritic cells. The aim of this work was to evaluate calreticulin expression in human normal ovaries, benign and borderline tumors, and epithelial ovarian cancer samples and to evaluate whether NGF regulates calreticulin expression in human ovarian surface epithelium and in epithelial ovarian cancer cell lines. Calreticulin mRNA and protein levels were analyzed using RT-PCR, Western blot and immunohistochemistry in 67 human ovarian samples obtained from our Institution. Calreticulin expression induced by NGF stimulation in cell lines was evaluated using RT-PCR, Western blot and immunocytochemistry. We found a significant increase of calreticulin mRNA levels in epithelial ovarian cancer samples as compared to normal ovaries, benign tumors, and borderline tumors. Calreticulin protein levels, evaluated by Western blot, were also increased in epithelial ovarian cancer with respect to benign and borderline tumors. When HOSE and A2780 cell lines were stimulated with Nerve Growth Factor, we found an increase in calreticulin protein levels compared to controls. This effect was reverted by GW441756, a TRKA specific inhibitor. These results suggest that NGF regulates calreticulin protein levels in epithelial ovarian cells through TRKA receptor activation.
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Affiliation(s)
- C Vera
- Laboratorio de Endocrinología y Biología de la Reproducción, Hospital Clínico Universidad de Chile, Santiago, Chile
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41
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42
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Ibarra M, Fagiolino P, Vázquez M, Ruiz S, Vega M, Bellocq B, Pérez M, González B, Goyret A. Impact of food administration on lopinavir-ritonavir bioequivalence studies. Eur J Pharm Sci 2012; 46:516-21. [PMID: 22522225 DOI: 10.1016/j.ejps.2012.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 02/23/2012] [Accepted: 04/03/2012] [Indexed: 10/28/2022]
Abstract
A bioequivalence study in 16 Caucasian healthy volunteers (eight male, eight female), comparing plasma drug concentrations after a single oral dose of lopinavir and ritonavir (400 and 100mg, respectively), was carried out following a two-period, two-sequence, two-treatment, randomized crossover design. Formulations were given 15 min after a moderate-fat breakfast in order to diminish both the intrinsic highly-variable performance and the sex differences observed in bioequivalence trials under fasting conditions. Ninety percent confidence intervals for the Test/Reference (T/R) ratio of geometric means for area under concentration-time curve (AUC) and maximum concentration (C(MAX)), either for lopinavir or ritonavir, were within the range of 0.80-1.25. Coprandial administration of formulations not only reduced the number of subjects required for bioequivalence assessment, reducing both ethical and economic cost of the trial, but also the sex differences in the T/R ratio of means.
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Affiliation(s)
- M Ibarra
- Center of Bioavailability and Bioequivalence for Medicine Evaluation, University of the Republic, Uruguay
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43
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Bonavida B, Huerta-Yepez S, Baritaki S, Vega M, Liu H, Chen H, Berenson J. Overexpression of Yin Yang 1 in the pathogenesis of human hematopoietic malignancies. Crit Rev Oncog 2012; 16:261-7. [PMID: 22248059 DOI: 10.1615/critrevoncog.v16.i3-4.90] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The transcription factor Yin Yang (YY) 1 has been reported to be overexpressed in several tumor types and plays a role in both the progression of the disease as well as the maintenance of tumor cell resistance to cell death by cytotoxic drugs. YY1 also has been reported to be a prognostic factor for several cancers and was proposed to be a therapeutic target. The expression, function, and role of YY1 in the pathogenesis of hematologic malignancies are summarized briefly herein. Data are represented for B non-Hodgkin lymphoma, AIDS-related lymphoma, multiple myeloma, and children's acute lymphocytic leukemia.
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Affiliation(s)
- B Bonavida
- Department of Microbiology, Immunology and Molecular Genetics, Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California at Los Angeles, USA.
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Abstract
Prior studies found that hepatitis C virus (HCV) risk assessment and testing in primary care clinics were suboptimal. We aimed to determine the actual HCV testing rate among patients with HCV risk factors and to identify variables predictive of testing. In order to do so, we performed a prospective cohort study among patients seen in four urban primary care clinics. At the initial visit, patients were given a questionnaire that listed HCV risk factors and they were instructed to check 'yes' or 'no' if they did or did not have a risk factor, respectively. Patients then handed this questionnaire to their physician during their initial visit. Among those who acknowledged having a HCV risk factor via the questionnaire, we determined the subsequent HCV testing rate and calculated adjusted odds ratios (aOR) with 95% confidence intervals (CI) to identify variables predictive of testing. Of the 578 individuals who acknowledged having a HCV risk factor via the questionnaire, only 8% (46/578) were tested for HCV within 2 months of their initial visit. Among those tested, 11% (5/46) had a positive HCV antibody test result. The only variable predictive of HCV testing after adjusting for confounders was having a specific HCV risk factor identified and documented in the chart by physicians [16% (26/159) vs 5% (20/419); aOR 4.5, 95% CI 2.1-9.5]. In summary, 92% of patients with a HCV risk factor were not tested for HCV in the primary care setting, and efforts to improve such rates are clearly warranted.
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Affiliation(s)
- C V Almario
- Department of Internal Medicine, Hospital of University of Pennsylvania, Philadelphia, PA, USA
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45
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Mennickent S, Vega M, Vega H, Diego M, Fierro R. Quantitative determination of propranolol in human serum by high-performance thin-layer chromatography. JPC-J PLANAR CHROMAT 2012. [DOI: 10.1556/jpc.25.2012.1.9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Alkalay A, Fuloria M, Blank A, Umanski G, Hudson M, Vega M, Hosinking W, Zonszein J, Landsberger E. 243: Neonatal metabolic complications of gestational diabetes: comparison of glyburide, insulin & diet therapy. Am J Obstet Gynecol 2012. [DOI: 10.1016/j.ajog.2011.10.261] [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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47
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Mehta S, Baia C, Vega M, Nemerofsky S, Bernstein PS, Hadpawat A. 525: Short-term neonatal outcomes in iatrogenic and spontaneous late preterm births in an urban population. Am J Obstet Gynecol 2011. [DOI: 10.1016/j.ajog.2010.10.544] [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: 10/18/2022]
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48
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Plaza F, Gabler F, Romero C, Vantman D, Valladares L, Vega M. The conversion of dehydroepiandrosterone into androst-5-ene-3beta,17beta-diol (androstenediol) is increased in endometria from untreated women with polycystic ovarian syndrome. Steroids 2010; 75:810-7. [PMID: 20620158 DOI: 10.1016/j.steroids.2010.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Revised: 04/01/2010] [Accepted: 06/22/2010] [Indexed: 11/21/2022]
Abstract
The changes in endometrial homeostasis found in women with polycystic ovarian syndrome (PCOS) could be associated with alterations in the intracrine metabolism of steroid hormones. The uptake of dehydroepiandrosterone-sulphate (DHEA-S), precursor of the intracrine pathway, is achieved by transporters, such as organic anion transporter polypeptides (OATPs), and molecules with oestrogenic activity, such as androst-5-ene-3beta,17beta-diol (androstenediol), can be generated. We aimed to determine androstenediol generation and the expression of OATPs in human endometria throughout the menstrual cycle and in endometria from PCOS women. Endometrial samples were obtained from control women in the proliferative phase (control endometria (CEp), n=7), secretory phase (CEs, n=7), and from PCOS patients (PCOSEp, n=7). The mRNA levels of OATP-B, OATP-D and OATP-E were measured by reverse transcriptase polymerase chain reaction (RT-PCR) and protein levels of OATP-E by immunofluorescence; 3beta-hydroxysteroid dehydrogenase (HSD) by immunohistochemistry/Western blot; the metabolism of DHEA to androstenediol was evaluated by thin layer chromatography-high-performance liquid chromatography (TLC-HPLC). Lower levels of OATP-E transcript were obtained in PCOSEp (p<0.05) compared with CEp, while OATP-E protein levels (p<0.05) and DHEA conversion to androstenediol (p<0.01) were higher in PCOSEp. Lower 3beta-(hydroxysteroid dehydrogenase) HSD protein levels were found in PCOSEp (p<0.05) (Western blot, immunohistochemistry). These results reveal a higher capacity of the endometria from PCOS women to metabolise DHEA to androstenediol, which, coupled with the high oestrogen sensitivity previously found in these endometria, may account for the increase in cell proliferation in PCOSEp already reported.
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Affiliation(s)
- F Plaza
- Department of Obstetrics and Gynecology, School of Medicine, University of Chile, Clinical Hospital, Santos Dumont # 999, Santiago, Chile
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49
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Castrillejo Y, Fernández P, Medina J, Vega M, Barrado E. Chemical and Electrochemical Extraction of Ytterbium from Molten Chlorides in Pyrochemical Processes. ELECTROANAL 2010. [DOI: 10.1002/elan.201000421] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Salazar O, Gajardo I, Salinas A, Vega M, Lienqueo M, Carmona R. Heterologous expression and characterization of novel cellulases from white rot fungi. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.08.473] [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: 10/18/2022]
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