443 results on '"A. Pelaez"'
Search Results
2. Publisher Correction: Novel laser model of optic nerve transection provides valuable insights about the dynamics of optic nerve regeneration
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Chloe Moulin, Galina Dvoriantchikova, Niloufar Bineshfar, Ben Swingle, Gaby Martinez, Daniel Groso, Michelle Zhang, Dmitry Ivanov, and Daniel Pelaez
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Medicine ,Science - Published
- 2024
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3. Novel laser model of optic nerve transection provides valuable insights about the dynamics of optic nerve regeneration
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Chloe Moulin, Galina Dvoriantchikova, Niloufar Bineshfar, Ben Swingle, Gaby Martinez, Daniel Groso, Michelle Zhang, Dmitry Ivanov, and Daniel Pelaez
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Medicine ,Science - Abstract
Abstract Optic nerve (ON) injury causes blindness in adult mammals as their retinal ganglion cells (RGCs) cannot regenerate axons. However, amphibian RGC axons do not experience the same regenerative failure. Studying the regeneration process of the ON in amphibians holds profound implications for regenerative medicine and human health. Using transgenic tadpoles and laser micro-optics, we developed a reproducible ON transection and regeneration model. Through microscopy of axon dynamics, functional testing to assess visual pathway recovery, TUNEL cell death and EdU cell proliferation assays, and RNA-seq of the retina and optic nerve, we characterized the optic nerve injury response and subsequent recovery. Our model suggests no chemoattractant gradient exists early in regeneration, with defasciculated axons sprouting in random directions from the globe-proximal cut end. Once individual axons reach the appropriate targets in the brain, their tract is reinforced by other regenerating axons, restoring normal ON morphology. Thus, guidance cues or scaffolding from brain-innervating axons likely support later stages of regeneration. After 14 days, the regenerated ON is morphologically indistinguishable from the naïve ON, and visual function is restored. We found no evidence of RGC death or new RGC formation in the model, suggesting that ON regeneration involves remodeling of injured axons of pre-existing RGCs.
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- 2024
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4. Comprehensive reanalysis for CNVs in ES data from unsolved rare disease cases results in new diagnoses
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German Demidov, Burcu Yaldiz, José Garcia-Pelaez, Elke de Boer, Nika Schuermans, Liedewei Van de Vondel, Ida Paramonov, Lennart F. Johansson, Francesco Musacchia, Elisa Benetti, Gemma Bullich, Karolis Sablauskas, Sergi Beltran, Christian Gilissen, Alexander Hoischen, Stephan Ossowski, Richarda de Voer, Katja Lohmann, Carla Oliveira, Ana Topf, Lisenka E. L. M. Vissers, Solve-RD Consortium, and Steven Laurie
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Medicine ,Genetics ,QH426-470 - Abstract
Abstract We report the results of a comprehensive copy number variant (CNV) reanalysis of 9171 exome sequencing datasets from 5757 families affected by a rare disease (RD). The data reanalysed was extremely heterogeneous, having been generated using 28 different enrichment kits by 42 different research groups across Europe partnering in the Solve-RD project. Each research group had previously undertaken their own analysis of the data but failed to identify disease-causing variants. We applied three CNV calling algorithms to maximise sensitivity, and rare CNVs overlapping genes of interest, provided by four partner European Reference Networks, were taken forward for interpretation by clinical experts. This reanalysis has resulted in a molecular diagnosis being provided to 51 families in this sample, with ClinCNV performing the best of the three algorithms. We also identified partially explanatory pathogenic CNVs in a further 34 individuals. This work illustrates the value of reanalysing ES cold cases for CNVs.
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- 2024
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5. AIBP controls TLR4 inflammarafts and mitochondrial dysfunction in a mouse model of Alzheimer’s disease
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Yi Sak Kim, Soo-Ho Choi, Keun-Young Kim, Juliana M. Navia-Pelaez, Guy A. Perkins, Seunghwan Choi, Jungsu Kim, Nicolaus Nazarenkov, Robert A. Rissman, Won-Kyu Ju, Mark H. Ellisman, and Yury I. Miller
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AIBP ,TLR4 ,Inflammaraft ,Lipid rafts ,Alzheimer’s disease ,Microglia ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Microglia-driven neuroinflammation plays an important role in the development of Alzheimer’s disease. Microglia activation is accompanied by the formation and chronic expression of TLR4 inflammarafts, defined as enlarged and cholesterol-rich lipid rafts serving as an assembly platform for TLR4 dimers and complexes of other inflammatory receptors. The secreted apoA-I binding protein (APOA1BP or AIBP) binds TLR4 and selectively targets cholesterol depletion machinery to TLR4 inflammaraft-expressing inflammatory, but not homeostatic microglia. Here we demonstrated that amyloid-beta (Aβ) induced formation of TLR4 inflammarafts in microglia in vitro and in the brain of APP/PS1 mice. Mitochondria in Apoa1bp −/− APP/PS1 microglia were hyperbranched and cupped, which was accompanied by increased reactive oxygen species and the dilated endoplasmic reticulum. The size and number of Aβ plaques and neuronal cell death were significantly increased, and the animal survival was decreased in Apoa1bp −/− APP/PS1 compared to APP/PS1 female mice. These results suggest that AIBP exerts control of TLR4 inflammarafts and mitochondrial dynamics in microglia and plays a protective role in Alzheimer’s disease associated oxidative stress and neurodegeneration.
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- 2024
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6. From dyspnea to diagnosis, unmasking undifferentiated cardiac sarcoma: a case report
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Mauricio Guerra-Raygada, Alee Jonhson Saavedra-Sanchez, Diego Hidalgo-Avendaño, Milagros F. Bermudez-Pelaez, David Guevara-Lazo, and Natalia Nombera-Aznaran
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Heart neoplasm ,Sarcoma ,Heart failure ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Abstract Background Sarcomas are the most common type of cardiac malignancy, but they are extremely rare. Within this group, angiosarcomas have the highest frequency, followed by undifferentiated sarcomas. This type of tumor has a poor prognosis and a high recurrence rate. Information about these tumors is limited, relying mainly on case reports and autopsy series. The purpose of this case report is to detail the multifaceted approach to diagnosing and managing an undifferentiated cardiac sarcoma and contribute to the literature. Case presentation A 28-year-old man presented with dyspnea and chest pain, which had developed progressively over several weeks. Physical examination revealed low blood pressure, elevated heart rate, and diminished heart sounds. Imaging, including a CT scan, identified a hypodense mass in the right ventricle. Further evaluation through echocardiograms and contrast angiotomography confirmed a mass causing right ventricular obstruction. Part of the tumor was surgically removed and diagnosed as cardiac sarcoma. Histopathological analysis of the mass showed an undifferentiated cardiac sarcoma. Conclusion This case underscores the significance of including cardiac tumors as a potential cause when diagnosing cardiac masses. It also demonstrates the poor prognosis and tendency for recurrence, while revealing the absence of established management guidelines.
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- 2024
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7. Rectus femoris cross sectional area and timed up and go test potential useful of as a predictor of sarcopenia and mortality in idiopathic pulmonary fibrosis
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Rocío Fernández-Jiménez, Eva Cabrera-Cesar, Alicia Sanmartín-Sánchez, Ana Sánchez-Garcia, Francisco Espildora-Hernandez, Isabel Vegas-Aguilar, Maria del Mar Amaya-Campos, Patricia Guirado-Pelaez, Victor Simón-Frapolli, Mora Murri, Lourdes Garrido-Sánchez, Lorena Piñel-Jimenez, Miguel Benítez Cano-Gamonoso, Javier López-García, Belén Gómez-Rodríguez, Jose Luis Velasco-Garrido, Francisco J. Tinahones, and José Manuel García-Almeida
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idiopathic pulmonary fibrosis ,sarcopenia ,morphofunctional assessment ,quality of life ,mortality ,Nutrition. Foods and food supply ,TX341-641 - Abstract
IntroductionIdiopathic pulmonary fibrosis (IPF) is a progressive lung disease often complicated by sarcopenia, significantly impacting patient outcomes. This study investigates the prevalence and clinical implications of sarcopenia in IPF patients using morphofunctional assessment methods.Materials and methodsEighty-four IPF patients (predominantly male) were evaluated for sarcopenia using the European Working Group on Sarcopenia in Older People 2 (EWGSOP2) criteria. Assessments included bioelectrical impedance vectorial analysis (Nutrilab, Akern), handgrip strength (HGS), Timed Up and Go test (TUG), and nutritional ultrasound (NU) measurements of rectus femoris and abdominal adipose tissue. Statistical analysis was performed (version 2.3.28 for macOS) to obtain sarcopenia cut-off points for the different techniques, and then the predictive capacity of these values for survival was analyzed using a Kaplan–Meier curve.ResultsSarcopenia was prevalent in 20.2% of the cohort. Sarcopenic patients exhibited significantly lower forced vital capacity (FVC) (2,142 mL vs. 2745.6 mL, p
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- 2024
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8. Circulating adenoid cystic carcinoma associated MYB transcripts enable rapid and sensitive detection of metastatic disease in blood liquid biopsies
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Acadia H.M. Moeyersoms, Kendall W. Knechtel, Andrew J. Rong, Ryan A. Gallo, Michelle Zhang, Harper M. Marsh, Zoukaa B. Sargi, Jason M. Leibowitz, Francisco J. Civantos, Donald T. Weed, Sander R. Dubovy, David T. Tse, and Daniel Pelaez
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Adenoid cystic carcinoma ,Rare cancer ,MYB ,Liquid biopsy ,Diagnostic biomarkers ,Medicine - Abstract
Adenoid cystic carcinoma (ACC) is a rare and lethal malignancy that originates in secretory glands of the head and neck. A prominent molecular feature of ACC is the overexpression of the proto-oncogene MYB. ACC has a poor long-term survival due to its high propensity for recurrence and protracted metastasis. Currently, clinical technologies lack the efficiency to distinguish patient prognosis prior to its redevelopment. We hypothesize that metastatic ACC can be detected by monitoring tumor-specific MYB expression in patients’ blood. We developed a quantitative polymerase chain reaction (qPCR) assay for MYB transcripts and screened blood samples from four patient cohorts: no history or evidence of ACC (n = 23), past history of ACC and no evidence of disease (NED) for greater than three years (n = 15), local ACC (n = 6), and metastatic ACC (n = 5). Our assay detected significantly elevated levels of MYB transcripts in the metastatic ACC cohort (p
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- 2024
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9. Reconstruction of Nearshore Surface Gravity Wave Heights From Distributed Acoustic Sensing Data
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Samuel Meulé, Julián Pelaez‐Quiñones, Frédéric Bouchette, Anthony Sladen, Aurélien Ponte, Annika Maier, Itzhak Lior, and Paschal Coyle
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distributed acoustic sensing (DAS) ,pressure sensor ,wave‐generated strain signals ,coastal waves ,linear theory ,transfer function ,Astronomy ,QB1-991 ,Geology ,QE1-996.5 - Abstract
Abstract Distributed Acoustic Sensing (DAS) is a photonics technology converting seafloor telecommunications and optical fiber cables into dense arrays of strain sensors, allowing to monitor various oceanic physical processes. Yet, several applications are hindered by the limited knowledge of the transfer function between geophysical variables and DAS measurements. This study investigates the quantitative relationship between surface gravity DAS‐recorded wave‐generated strain signals along the seafloor and the pressure at a colocated sensor. A remarkable linear correlation is found over various sea conditions allowing us to reliably determine significant wave heights from DAS data. Utilizing linear wave potential theory, we derive an analytical transfer function linking cable deformation and wave kinematic parameters. This transfer function provides a first quantification of the effects related to surface gravity waves and fiber responses. Our results validate DAS's potential for real‐time reconstruction of the surface gravity wave spectrum over extended coastal areas. It also enables the estimation of waves hydraulic parameters at depth without the need from offshore deployments.
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- 2024
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10. The impact of immune dysregulation on the risk of malignancy in common variable immunodeficiency: insights from a multicenter study
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Marta Dafne Cabañero-Navalon, Victor Garcia-Bustos, Héctor Balastegui-Martin, Carmen Bracke, Lourdes Mateu, Xavier Solanich, Juan Luis Carrillo-Linares, Angel Robles-Marhuenda, Francesc Puchades, Ana Pelaez Ballesta, Nuria Lopez-Osle, Miguel Ángel Torralba-Cabeza, Ana María Bielsa Masdeu, Jorge Gil Niño, Nuria Tornador Gaya, Guillem Pascual Castellanos, Rosario Sánchez-Martínez, José Manuel Barragán-Casas, Andrés González-García, José Luis Patier de la Peña, Daniel López-Wolf, Antonia Mora Rufete, Alba Canovas Mora, and Pedro Moral Moral
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common variable immunodeficiency ,immune dysregulation ,malignancy ,cancer risk ,immunosuppressants ,Immunologic diseases. Allergy ,RC581-607 - Abstract
BackgroundCommon Variable Immunodeficiency (CVID) represents a heterogenic group of primary immunodeficiencies (PID) characterized by impaired antibody production and susceptibility to infections. Non-infectious complications, such as autoimmune diseases, lymphoproliferative disorders, and malignancies, now significantly impact prognosis. Moreover, both hematologic and solid organ malignancies are more frequently observed in CVID patients compared to other PIDs. The risk factors for carcinogenesis in CVID remain largely unknown.ObjectiveThis multicenter study aims to characterize the clinical profile of cancer in CVID patients in Spain and to identify independent risk factors associated with malignancy development, focusing on the role of immune dysregulation.MethodsA nationwide, cross-sectional study was conducted from November 2019 to May 2022, involving 17 hospitals treating PID patients in Spain. Data were collected systematically on demographics, infectious and non-infectious comorbidities, immunological parameters, and treatment. Statistical analysis, including multivariate logistic regression, was performed to identify risk factors associated to malignancy.ResultsOf 250 CVID patients, 38 (15.26%) were diagnosed with cancer, predominantly non-Hodgkin lymphoma, gastric cancer, and lung adenocarcinoma. Cancer patients were significantly older (mean age 60.70 vs. 49.36 years, p
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- 2024
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11. Exploring digital competencies in higher education: design and validation of instruments for the era of Industry 5.0
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Iris Cristina Pelaez-Sanchez, Leonardo David Glasserman-Morales, and Gerardo Rocha-Feregrino
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digital competency ,core competencies ,Industry 5.0 ,higher education ,design of instruments ,validation of instruments ,Education (General) ,L7-991 - Abstract
IntroductionIndustry 5.0 is the next phase of industrial work that integrates robots and artificial intelligence to boost productivity and economic growth. It emphasizes a balance between human creativity and technological precision, built on three pillars: human centrality, sustainability, and resilience. Corporations and educational institutions must adopt an integrated approach to training their future workforce, emphasizing digital and key competencies such as creativity, communication, collaboration, and critical thinking. Higher education institutions must measure digital competencies and other key Industry 5.0 competencies to prepare students for a sustainable future. However, there is a need to identify appropriate scientific instruments that can comprehensively evaluate these competencies.MethodsThis study conducted a Systematic Literature Review to analyze the existing digital competency assessment instruments in higher education from 2013-2023. The focus was on instruments that measure digital competencies and core competencies for Industry 5.0, such as creativity, communication, collaboration, and critical thinking. The search process began with a strategy applied across various databases, including ERIC, Google Scholar, ProQuest, Scopus, and Web of Science, to cover a broad range of literature on the design and validation of digital competency assessment tools.ResultsThis search generated a total of 9,563 academic papers. Inclusion, exclusion, and quality filters were applied to select 112 articles for detailed analysis. Among these 112 articles, 46 focused on designing and validating digital competency assessment instruments in higher education. Within the reviewed literature, surveys and questionnaires emerged as the predominant methods utilized for this purpose. This study found a direct relationship between digital competencies and essential skills like communication and critical thinking.DiscussionThe study concludes that assessment tools should integrate a wide range of competencies, and students and educators should be actively involved in developing these skills. Future research should focus on designing tools that effectively evaluate these competencies in dynamic work contexts. Assessment instruments should cover a broader range of competencies, including creativity and collaboration, to meet the demands of Industry 5.0. Reliable assessments of digital competencies and soft skills are crucial, with a need for appropriate reliability tests that do not impact students’ preparedness for labor market challenges.
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- 2024
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12. Performance of the Idylla microsatellite instability test in endometrial cancer
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Marta Mendiola, Victoria Heredia-Soto, Ignacio Ruz-Caracuel, Amparo Baillo, Jorge Luis Ramon-Patino, Alberto Berjon, Francisco Javier Escudero, Alberto Pelaez-Garcia, Alicia Hernandez, Jaime Feliu, David Hardisson, and Andres Redondo
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Endometrial carcinoma ,Mismatch repair deficiency ,Microsatellite instability ,Idylla ,Biology (General) ,QH301-705.5 ,Medicine - Abstract
Context: DNA mismatch repair (MMR) deficiency (dMMR) testing is now recommended in endometrial cancer. Defect identification in the molecules participating in this pathway, or the presence of microsatellite instability, are commonly employed for this purpose. Novel methods are continuously evolving to report dMMR/microsatellite instability and to easily perform routine diagnoses. Objective: The main aim of this study was to compare the concordance of the Idylla microsatellite instability test for the identification of dMMR endometrial cancer samples defined by immunohistochemistry and MMR genomic status. Design: We applied the Idylla MSI test to 126 early-stage endometrial cancer cases with MMR testing by immunohistochemistry and genomic characterization (methylation in MLH1 and sequence alterations in MLH1, PMS2, MSH2 and MSH6). Individual markers and overall specific performance indicators were explored. Results: The Idylla platform achieved a higher global concordance rate with MMR genomic status than with immunohistochemistry (75 % and 66 %, respectively). Sensitivity and specificity are also higher (75 % vs 66 % and 96 % vs 90 %, respectively). Clustering analysis split the patients into 2 well-differentiated clusters, the pMMR and the dMMR group, represented by MLH1/PMS2 loss and the MLH1 methylated promoter. Overall, immunohistochemistry and MMR genomic status identified more dMMR cases than did the Idylla test, although correlations were improved with a modified Idylla test cut-off. Conclusions: Performance of the Idylla test was better correlated with MMR genomic status than MMR immunohistochemistry status, which improved with a modified test cut-off. Further studies are needed to confirm the cut-off accuracy.
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- 2024
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13. IκBα controls dormancy in hematopoietic stem cells via retinoic acid during embryonic development
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Roshana Thambyrajah, Maria Maqueda, Muhammad Zaki Fadlullah, Martin Proffitt, Wen Hao Neo, Yolanda Guillén, Marta Casado-Pelaez, Patricia Herrero-Molinero, Carla Brujas, Noemi Castelluccio, Jessica González, Arnau Iglesias, Laura Marruecos, Cristina Ruiz-Herguido, Manel Esteller, Elisabetta Mereu, Georges Lacaud, Lluis Espinosa, and Anna Bigas
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Science - Abstract
Abstract Recent findings suggest that Hematopoietic Stem Cells (HSC) and progenitors arise simultaneously and independently of each other already in the embryonic aorta-gonad mesonephros region, but it is still unknown how their different features are established. Here, we uncover IκBα (Nfkbia, the inhibitor of NF-κB) as a critical regulator of HSC proliferation throughout development. IκBα balances retinoic acid signaling levels together with the epigenetic silencer, PRC2, specifically in HSCs. Loss of IκBα decreases proliferation of HSC and induces a dormancy related gene expression signature instead. Also, IκBα deficient HSCs respond with superior activation to in vitro culture and in serial transplantation. At the molecular level, chromatin regions harboring binding motifs for retinoic acid signaling are hypo-methylated for the PRC2 dependent H3K27me3 mark in IκBα deficient HSCs. Overall, we show that the proliferation index in the developing HSCs is regulated by a IκBα-PRC2 axis, which controls retinoic acid signaling.
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- 2024
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14. Educación en emprendimiento y sostenibilidad para la configuración de intenciones emprendedoras sostenibles en estudiantes universitarios
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Guadalupe Calderón Martínez and Johanna Pelaez-Higuera
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General Works - Abstract
La intención emprendedora sostenible (IES) representa la disposición de los individuos para desarrollar negocios que generen riqueza económica y aborden problemas sociales y ambientales. Este estudio adopta el modelo de Sharma et al. (2023) para evaluar la influencia de la educación en sostenibilidad y emprendimiento en la formación de la IES en estudiantes universitarios mexicanos. Se encuestaron 79 estudiantes que habían cursado asignaturas relacionadas con emprendimiento y sostenibilidad. Los datos recopilados se analizaron utilizando el modelo de ecuaciones estructurales, procesados mediante Smart PLS 4.0 por su confiabilidad en muestras pequeñas. Los resultados indican la eficacia y replicabilidad del modelo en Latinoamérica, destacando la preocupación ambiental como la variable menos influyente en la IES. Además, se identificó una baja comprensión de los objetivos de desarrollo como un área a fortalecer para fomentar la IES. Estos hallazgos sugieren la necesidad de mejorar la educación sobre sostenibilidad y promover una mayor conciencia de los objetivos de desarrollo para impulsar la IES en estudiantes universitarios.
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- 2024
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15. Performance of posterior third-generation monolithic zirconia crowns in a complete digital workflow: A three-year prospective clinical study
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Mustafa Gseibat, Pablo Sevilla, Carlos Lopez-Suarez, Veronica Rodriguez, Jesus Pelaez, and Maria J. Suarez
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Full coverage restoration ,Monolithic zirconia ,Posterior crown ,Single crown ,Zirconia ,Dentistry ,RK1-715 - Abstract
Background/purpose: Translucent monolithic zirconia restorations have recently introduced. The purpose of this study was to evaluate the clinical behavior and the survival rate of the posterior third-generation monolithic zirconia crowns (MZCs) during three years of clinical service. Materials and methods: Twenty-four patients who needed thirty crowns were enrolled in this study. Digital impressions were made, and the crowns were milled and cemented with a resin cement. The crowns outcomes were assessed using the California Dental Association's (CDA) criteria. Gingival index (GI), plaque index (PI), and periodontal probing depth (PPD) for MZCs and contralateral natural teeth (control) were assessed. Margin index (MI) for MZCs was also assessed. Data analysis was conducted using the Wilcoxon signed-rank and the Friedman tests. Results: The 3-year survival rate was 100%. All MZCs were rated as satisfactory throughout the follow-up period, and no biological or mechanical complications were observed. No differences were recorded when GI, PI and PPD at 3-year of follow-up were compared to baseline. No differences were recorded between crowned and control teeth. The MI remained stable throughout the study period. Conclusion: The third-generation monolithic zirconia appears to be a good treatment option for the rehabilitation of posterior single teeth.
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- 2024
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16. Erratum: Global parameterization of $$\pi \pi $$ π π scattering up to 2 GeV
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J. R. Pelaez, A. Rodas, and J. Ruiz de Elvira
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Astrophysics ,QB460-466 ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Published
- 2024
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17. Avances diagnósticos en la fiebre de origen desconocido: una revisión bibliográfica
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Juan Jose Reinoso Calle, Ana Gabriela Barros Pelaez, Adriana Betsabé López Campoverde, and Jhomayra Michelle Segovia Valdiviezo
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Fiebre de Origen Desconocido ,Diagnóstico ,Tomografía por emisión de positrones ,Medicine (General) ,R5-920 - Abstract
El fenómeno conocido como fiebre de origen desconocido (FOD), término acuñado por Petersdorf y Beeson en 1961, sigue siendo un reto persistente y complejo para la comunidad médica. A pesar de los avances significativos en las tecnologías de diagnóstico y en los conocimientos médicos, el diagnóstico definitivo sigue eludiendo a los médicos en más de la mitad de los casos. La FUO abarca una gran variedad de causas potenciales como trastornos infecciosos, reumáticos-inflamatorios, neoplásicos y diversos, cada uno de los cuales presenta un conjunto único de síntomas, manifestaciones clínicas y hallazgos de laboratorio que desafían una categorización fácil. La tarea a la que se enfrentan los profesionales sanitarios es polifacética, ya que les exige evaluar meticulosamente estos indicios clínicos dispares y navegar por un laberinto de diagnósticos potenciales para descubrir la causa subyacente. Para abordar este dilema diagnóstico, se han desarrollado enfoques innovadores que aprovechan tecnologías como la tomografía por emisión de positrones con fluorodesoxiglucosa, la secuenciación metagenómica de nueva generación y análisis genéticos exhaustivos como la secuenciación del exoma completo. Estas técnicas de vanguardia ofrecen nuevas vías de investigación y han demostrado resultados prometedores en la identificación de los orígenes elusivos del FUO, allanando en última instancia el camino para estrategias de tratamiento más específicas y eficaces.
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- 2024
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18. Enhancing quality of life in severe post-COVID-19 survivors through multidisciplinary care
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Daniela Josefina Cataneo-Piña, Armando Castorena-Maldonado, Dulce González-Islas, Susana Galicia-Amor, Arturo Orea-Tejeda, Viridiana Pelaez-Hernández, Alma Delia Gutiérrez-Álvarez, Jorge Rojas-Serrano, Eduardo Ortiz-Reyes, Aline Mendoza-Méndez, Ángel Mendoza-Escamilla, Sinuhe Fabre-Alonso, Ivette Buendía-Roldán, Laura Gochicoa-Rangel, Carlos López-García, Marian Radillo-Gil, Celia Gabriela Hernández Favela, Sergio Monraz-Perez, Jorge Salas-Hernández, and Patricio Santillán-Doherty
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Medicine - Abstract
Background COVID-19 survivors who were hospitalised continue to experience long-term multisystemic sequelae and symptoms, impacting their health-related quality of life (HRQoL). The complexity of post-COVID-19 conditions underscores the importance of adopting a multidisciplinary, patient-centric approach to ensure ongoing care. This study aims to assess HRQoL and post-COVID symptoms in a cohort of severe COVID-19 survivors depending on their participation in a multidisciplinary programme. Methods This prospective study was conducted in a post-COVID clinic staffed by a multidisciplinary team (physical rehabilitator, nutritionist, psychologist, including experts in pulmonary rehabilitation, nutrition, psychology and others). Subjects over 18 years old who were hospitalised due to severe COVID-19 during the acute phase and had attended the post-COVID clinic within the first 3 months following discharge were included. Subjects who were unable or unwilling to provide informed consent to participate in the protocol were excluded. Linear mixed-effect models were employed to examine changes in 12-Item Short-Form Health Survey (SF-12) component scores. The resolution of post-COVID symptom clusters was compared using the Cox model. Results A total of 730 patients were included, with a mean±sd age of 55.78±15.43 years; 60.55% were male and 90.62% required mechanical ventilation during hospitalisation. Programme attendants demonstrated improved SF-12 physical and mental component scores at 3 and 12 months. A reduction in the prevalence of post-COVID symptoms was observed in both groups, with greater reductions in those attending the programme. Conclusion Our study showed that patients enrolled on the multidisciplinary programme experienced improvements in fatigue, musculoskeletal, gastrointestinal, neuropsychiatric and respiratory symptoms, along with enhanced SF-12 mental and physical component scores.
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- 2024
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19. BSE risk posed by ruminant collagen and gelatine derived from bones
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EFSA Panel on Biological Hazards (BIOHAZ), Konstantinos Koutsoumanis, Ana Allende, Declan Bolton, Sara Bover‐Cid, Marianne Chemaly, Alessandra De Cesare, Lieve Herman, Friederike Hilbert, Roland Lindqvist, Maarten Nauta, Romolo Nonno, Luisa Peixe, Giuseppe Ru, Marion Simmons, Panagiotis Skandamis, Elisabetta Suffredini, Amie Adkin, Olivier Andreoletti, John Griffin, Barbara Lanfranchi, Angel Ortiz‐Pelaez, and Avelino Alvarez Ordonez
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BSE ,cattle ,collagen ,exposure ,feed ,food ,Nutrition. Foods and food supply ,TX341-641 ,Chemical technology ,TP1-1185 - Abstract
Abstract The European Commission requested an estimation of the BSE risk (C‐, L‐ and H‐BSE) from gelatine and collagen derived from ovine, caprine or bovine bones, and produced in accordance with Regulation (EC) No 853/2004, or Regulation (EC) No 1069/2009 and its implementing Regulation (EU) No 142/2011. A quantitative risk assessment was developed to estimate the BSE infectivity, measured in cattle oral infectious dose 50 (CoID50), in a small size batch of gelatine including one BSE‐infected bovine or ovine animal at the clinical stage. The model was built on a scenario where all ruminant bones could be used for the production of gelatine and high‐infectivity tissues remained attached to the skull (brain) and vertebral column (spinal cord). The risk and exposure pathways defined for humans and animals, respectively, were identified. Exposure routes other than oral via food and feed were considered and discussed but not assessed quantitatively. Other aspects were also considered as integrating evidence, like the epidemiological situation of the disease, the species barrier, the susceptibility of species to BSE and the assumption of an exponential dose–response relationship to determine the probability of BSE infection in ruminants. Exposure to infectivity in humans cannot be directly translated to risk of disease because the transmission barrier has not yet been quantified, although it is considered to be substantial, i.e. much greater amounts of infectivity would be needed to successfully infect a human and greater in the oral than in the parenteral route of exposure. The probability that no new case of BSE in the cattle or small ruminant population would be generated through oral exposure to gelatine made of ruminant bones is 99%–100% (almost certain) This conclusion is based on the current state of knowledge, the epidemiological situation of the disease and the current practices, and is also valid for collagen.
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- 2024
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20. Tetanus-diphtheria vaccine can prime SARS-CoV-2 cross-reactive T cells
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Sara Alonso Fernandez, Hector F. Pelaez-Prestel, Tara Fiyouzi, Marta Gomez-Perosanz, Jesús Reiné, and Pedro A. Reche
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COVID-19 ,SARS-CoV-2 ,epitope ,T cell cross-reactivity ,tetanus-diphtheria toxoid vaccines ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Vaccines containing tetanus-diphtheria antigens have been postulated to induce cross-reactive immunity to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which could protect against coronavirus disease (COVID-19). In this work, we investigated the capacity of Tetanus-diphtheria (Td) vaccine to prime existing T cell immunity to SARS-CoV-2. To that end, we first collected known SARS-CoV-2 specific CD8+ T cell epitopes targeted during the course of SARS-CoV-2 infection in humans and identified as potentially cross-reactive with Td vaccine those sharing similarity with tetanus-diphtheria vaccine antigens, as judged by Levenshtein edit distances (≤ 20% edits per epitope sequence). As a result, we selected 25 potentially cross-reactive SARS-CoV-2 specific CD8+ T cell epitopes with high population coverage that were assembled into a synthetic peptide pool (TDX pool). Using peripheral blood mononuclear cells, we first determined by intracellular IFNγ staining assays existing CD8+ T cell recall responses to the TDX pool and to other peptide pools, including overlapping peptide pools covering SARS-CoV-2 Spike protein and Nucleocapsid phosphoprotein (NP). In the studied subjects, CD8+ T cell recall responses to Spike and TDX peptide pools were dominant and comparable, while recall responses to NP peptide pool were less frequent and weaker. Subsequently, we studied responses to the same peptides using antigen-inexperienced naive T cells primed/stimulated in vitro with Td vaccine. Priming stimulations were carried out by co-culturing naive T cells with autologous irradiated peripheral mononuclear cells in the presence of Td vaccine, IL-2, IL-7 and IL-15. Interestingly, naive CD8+ T cells stimulated/primed with Td vaccine responded strongly and specifically to the TDX pool, not to other SARS-CoV-2 peptide pools. Finally, we show that Td-immunization of C57BL/6J mice elicited T cells cross-reactive with the TDX pool. Collectively, our findings support that tetanus-diphtheria vaccines can prime SARS-CoV-2 cross-reactive T cells and likely contribute to shape the T cell responses to the virus.
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- 2024
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21. Impacto de COVID-19 en la mortalidad de personas mayores de la población de Córdoba, Argentina. Análisis preliminar de los dos primeros años de la pandemia
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Enrique Pelaez, Leandro Mariano González, and Laura Débora Acosta
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COVID-19 ,mortalidad ,personas mayores ,Economic theory. Demography ,HB1-3840 - Abstract
Introducción: El trabajo analiza el impacto de la pandemia por COVID-19 en las personas mayores de Córdoba, Argentina, durante 2020 y 2021, mediante la medición del exceso de defunciones (ED) y el cambio de esperanza de vida (EV). Metodología: Se utilizaron datos del Ministerio de Salud Nacional sobre las defunciones para el período 2017-2020. Se calcularon tablas de vida para el trienio 2017-2019 y para 2020 y 2021. Por último, se calculó la descomposición de las diferencias de EV en 2020 y 2021. Resultados: En 2020 hubo un 10,3 % de exceso de defunciones y un 25,5 % en 2021, mayor en varones. El ED se concentró en personas mayores de 60 años, aunque en 2021 fue importante la mortalidad de adultos jóvenes. En 2020, la tasa de ED en varones mayores de 80 años triplicó al grupo de 60-79 años y hubo un marcado sesgo entre varones y mujeres. En 2021, disminuyeron las diferencias entre edades y sexos, aunque se mantuvo la mayor tasa para varones mayores de 80 años. En 2020, las muertes por COVID-19 explicaron el 74,2 % y el 102,4 % del ED de varones y mujeres, respectivamente; en 2021, explicaron el 60,2 % y el 57,7 %, respectivamente. La pérdida de EV en 2020 fue de un 0,83 año en varones y un 0,26 año en mujeres; en 2021, fue de 2,73 años y 2,25 años, respectivamente. En los varones mayores, la disminución de EV se concentró en enfermedades infecciosas y COVID-19. Conclusiones: El conocimiento del impacto de la pandemia sobre personas mayores ofrece evidencias valiosas para la planificación de políticas sanitarias.
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- 2024
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22. Explorando Temas en Recursos Educativos Abiertos de Tecnologías de la Información a través del Algoritmo LDA
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Veronica Segarra-Faggioni, Audrey Romero-Pelaez, Juan Carlos Morocho-Yunga, and René Ludeña
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metadata ,oer ,lda ,minería de texto ,modelado de temas ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Este artículo aplica el algoritmo Latent Dirichlet Allocation, LDA, como una técnica de aprendizaje de máquina y minería de texto para descubrir temas en OER en el contexto de la educación en ingeniería. El algoritmo LDA permite extraer temas, en este estudio los temas que se extraen de OER pueden ser considerados como metadatos adicionales que enriquecerán la descripción y clasificación de los mismos. Además, se define una metodología para la identificación automática de temas en los recursos educativos abiertos. En esta investigación, se utiliza un dataset de 80 OER extraído del repositorio Skills Commons. El valor más alto de coherencia es 0.42, cuando el número de temas en el modelo LDA es 9. Estos nueve temas están relacionados con Educación en Tecnologías de la Información.
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- 2024
23. Phenotypic Diversity of Morphological Traits of Pitahaya (Hylocereus spp.) and Its Agronomic Potential in the Amazonas Region, Peru
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Julio Cesar Santos-Pelaez, David Saravia-Navarro, Julio H. I. Cruz-Delgado, Miguel Angel del Carpio-Salas, Elgar Barboza, and David Pavel Casanova Nuñez Melgar
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biodiversity ,characterization ,descriptor ,dragon fruit ,genetic improvement ,Hylocereus spp. ,Agriculture (General) ,S1-972 - Abstract
Pitahaya (Hylocereus spp.) is an economically significant cactus fruit in Peru, renowned for its rich nutritional profile and antioxidant properties while exhibiting wide biological diversity. This study aimed to morphologically characterize seven pitahaya accessions using qualitative and quantitative descriptors related to the cladodes, flowers, and fruits. Univariate and multivariate (FAMD, PCA, MCA, and clustering) analyses were employed to identify and classify the accessions based on their morphological traits. The analyses revealed three distinct groups: one consisting solely of AC.07; another with AC.02, AC.04, and AC.06; and a third including AC.01, AC.03, and AC.05. The first group exhibited superior characteristics, particularly in fruit traits such as the stigma lobe count (23.3), number of bracts (26.5 mm), and length of apical bracts (15.75 mm). The second group recorded the highest spine count (3.21), bract length (16.95 mm), and awn thickness (5.12 mm). The third group had the highest bract count (37) and an average locule number (23.65). These findings highlight the significant morphological diversity among the accessions, indicating the potential for classification and selection in pitahaya cultivation. The potential of AC.07 stands out in terms of its agronomic qualities, such as its fruit weight (451.93 g) and pulp weight (292.5 g), surpassing the other accessions.
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- 2024
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24. Large-scale text analysis using generative language models: A case study in discovering public value expressions in AI patents
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Sergio Pelaez, Gaurav Verma, Barbara Ribeiro, and Philip Shapira
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Science (General) ,Q1-390 - Published
- 2024
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25. Symmetrical cutaneous rash in two women
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Gionathan Orioni, Maria Camila Velez‐Pelaez, Michela V. R. Starace, Vera Tengattini, Emanuel Raschi, and Michelangelo La Placa
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baboon syndrome ,doxorubicin ,drug reaction ,SDRIFE ,systemic contact dermatitis ,Medicine ,Medicine (General) ,R5-920 - Abstract
Key Clinical Message Symmetrical drug‐related intertriginous and flexural exanthema, commonly known as “baboon syndrome” due to its typical involvement of the gluteal area, is an erythematous symmetrical rash associated with systemic drug administration.
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- 2024
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26. Alzheimer’s and Parkinson’s disease drugs side effects
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J. Batistela, F. J. Ropero Pelaez, G. Hida, and S. Taniguchi
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Psychiatry ,RC435-571 - Abstract
Introduction Alzheimer’s and Parkinson’s disease are neurodegenerative disorders with life limiting conditions. The symptomatic pharmacological therapeutic strategies unfortunately are also related to undesirable side effects. Acetylcholinesterase inhibitors administered to Alzheimer’s disease patients increase cholinergic transmission in cortex and hippocampus. Antiparkinsonian drugs increase dopaminergic system activity, to compensate for dopaminergic neurons’ degeneration in corpus striatum, therefore supplying the imbalance of these neurotransmitters in these degenerative areas.But undesirable the increase of these neurotransmitters in other cerebral and peripheral areas brings us important side effects Objectives To study Alzheimer’s cholinergic drugs and Parkinson’s dopaminergic drugs’ side effects Methods This retrospective study included 107 geriatric patients enrolled in a private long-term care institution. 79 patients with Alzheimer’s disease had mean age of 88.11 ± 5,78 years old, mean weight of 61.62 ± 13.10 kg. 28 patients with Parkinson’s disease had mean age of 84.93 ± 5.71 years old, weight mean 66.36 ± 2.83 kg. Results Alzheimer’s disease patients 41.77% (33) received. Acetylcholinesterase inhibitors (Donepezil, galantamine and rivastigmine) Psychomotor agitation and aggressive behavior 63.666% and nausea (15%) were observed in the patients treated with these drugs. The association of L-DOPA and DOPA decarboxylase inhibitors (benserazide) were administered to 53%(15) of the Parkinson’s disease patients in doses between 2.0-19.0 mg/kg/day. L-DOPA associated to catechol-O-methyltransferase inhibitor (entacapone) 3 mg/kg/day were given to 7.14% (2) patients. Bromocriptine 0.04 mg/kg/day was given to 3.57% (1) patients. Mental confusion and hallucination side effects were observed in 53.33% (8) patients treated with L-DOPA associated with the DOPA decarboxylase inhibitor (benserazide). Conclusions The increase of cholinergic activity due to the acetylcholinesterase inhibitors in the Nigro- striatal pathway could be related to psychomotor agitation in Alzheimer’s disease patients in a similar way to akathisia induced by neuroleptics. The increase of dopamine levels due to the administration of L-DOPA, in corpus striatum improved Parkinson’s disease symptoms although the increase of dopaminergic activity at mesocortical pathways may be related to confusion and hallucination observed in these patients. Adjustments in dosage of these drugs could provide improvement in these patients’ daily life conditions. Disclosure of Interest None Declared
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- 2024
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27. Evaluation of alternative methods of tunnel composting (submitted by the European Composting Network) II
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EFSA Panel on Biological Hazards (BIOHAZ), Konstantinos Koutsoumanis, Ana Allende, Declan Bolton, Sara Bover‐Cid, Marianne Chemaly, Lieve Herman, Friederike Hilbert, Roland Lindqvist, Maarten Nauta, Romolo Nonno, Luisa Peixe, Panagiotis Skandamis, Giuseppe Ru, Marion Simmons, Alessandra De Cesare, Pablo Fernandez Escamez, Elisabetta Suffredini, Angel Ortiz‐Pelaez, and Avelino Alvarez Ordonez
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ABP ,alternative method ,category 3 ,compost ,tunnel ,Nutrition. Foods and food supply ,TX341-641 ,Chemical technology ,TP1-1185 - Abstract
Abstract Two alternative methods for producing compost in a tunnel, from certain category (Cat.) 3 animal by‐products (ABP) and other non‐ABP material, were assessed. The first method proposed a minimum temperature of 55°C for 72 h and the second 60°C for 48 h, both with a maximum particle size of 200 mm. The assessment of the Panel on Biological Hazards (BIOHAZ) exclusively focused on Cat. 3 ABP materials (catering waste and processed foodstuffs of animal origin no longer intended for human consumption). The proposed composting processes were evaluated for their efficacy to achieve a reduction of at least 5 log10 of Enterococcus faecalis and Salmonella Senftenberg (775W, H2S negative) and at least 3 log10 of relevant thermoresistant viruses. The applicant provided a list of biological hazards that may enter the composting process and selected parvoviruses as the indicator of the thermoresistant viruses. The evidence provided by the applicant included: (a) literature data on thermal inactivation of biological hazards; (b) results from validation studies on the reduction of E. faecalis, Salmonella Senftenberg 775W H2S negative and canine parvovirus carried out in composting plants across Europe; (c) and experimental data from direct measurements of reduction of infectivity of murine parvovirus in compost material applying the time/temperature conditions of the two alternative methods. The evidence provided showed the capacity of the proposed alternative methods to reduce E. faecalis and Salmonella Senftenberg 775W H2S negative by at least 5 log10, and parvoviruses by at least 3 log10. The BIOHAZ Panel concluded that the two alternative methods under assessment can be considered to be equivalent to the processing method currently approved in the Commission Regulation (EU) No 142/2011.
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- 2024
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28. Extending heart preservation to 24 h with normothermic perfusion
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Brianna L. Spencer, Spencer K. Wilhelm, Christopher Stephan, Kristopher A. Urrea, Daniela Pelaez Palacio, Robert H. Bartlett, Daniel H. Drake, and Alvaro Rojas-Pena
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heart preservation ,normothermic ,ex situ ,ex vivo ,prolonged ,perfusion ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Cold static storage (CSS) for up to 6 h is the gold standard in heart preservation. Although some hearts stored over 6 h have been transplanted, longer CSS times have increased posttransplant morbimortality. Transmedics® Organ Care System (OCS™) is the only FDA-approved commercial system that provides an alternative to CSS using normothermic ex situ heart perfusion (NEHP) in resting mode with aortic perfusion (Langendorff method). However, it is also limited to 6 h and lacks an objective assessment of cardiac function. Developing a system that can perfuse hearts under NEHP conditions for >24 h can facilitate organ rehabilitation, expansion of the donor pool, and objective functional evaluation. The Extracorporeal Life Support Laboratory at the University of Michigan has worked to prolong NEHP to >24 h with an objective assessment of heart viability during NEHP. An NEHP system was developed for aortic (Langendorff) perfusion using a blood-derived perfusate (leukocyte/thrombocyte-depleted blood). Porcine hearts (n = 42) of different sizes (6–55 kg) were divided into five groups and studied during 24 h NEHP with various interventions in three piglets (small-size) heart groups: (1) Control NEHP without interventions (n = 15); (2) NEHP + plasma exchange (n = 5); (3) NEHP + hemofiltration (n = 10) and two adult-size (juvenile pigs) heart groups (to demonstrate the support of larger hearts); (4) NEHP + hemofiltration (n = 5); and (5) NEHP with intermittent left atrial (iLA) perfusion (n = 7). All hearts with NEHP + interventions (n = 27) were successfully perfused for 24 h, whereas 14 (93.3%) control hearts failed between 10 and 21 h, and 1 control heart (6.6%) lasted 24 h. Hearts in the piglet hemofiltration and plasma exchange groups performed better than those in the control group. The larger hearts in the iLA perfusion group (n = 7) allowed for real-time heart functional assessment and remained stable throughout the 24 h of NEHP. These results demonstrate that heart preservation for 24 h is feasible with our NEHP perfusion technique. Increasing the preservation period beyond 24 h, infection control, and nutritional support all need optimization. This proves the concept that NEHP has the potential to increase the organ pool by (1) considering previously discarded hearts; (2) performing an objective assessment of heart function; (3) increasing the donor/recipient distance; and (4) developing heart-specific perfusion therapies.
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- 2024
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29. Using Index Function and Artificial Intelligence to assess Sustainability: A Bibliometric analysis
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Mónica Cardoso, Enrique Ares, Luís Pinto Ferreira, and Gustavo Pelaez
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sustainability index function ,sustainability manufacturing ,triple bottom line ,ai sustainable manufacturing ,Industrial engineering. Management engineering ,T55.4-60.8 - Abstract
Industrial sustainability has increased, focusing on social, economic, and environmental. The aim of this study is to carry out a systematic bibliometric analysis of the existing literature on sustainability indices and artificial intelligence-based tools for measuring and assessing the sustainability of production systems. For this statistical analysis, three scientific databases - Web of Science, Elsevier's Scopus and Dimensions - were used to identify relevant research articles and explore their temporal and geographical distribution. This data sheds light on the development of sustainable manufacturing and encourages future research in this area. This research aims to increase knowledge about sustainable development.
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- 2023
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30. Racial difference in mortality among COVID-19 hospitalizations in California
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Muni Rubens, Venkataraghavan Ramamoorthy, Anshul Saxena, Juan Carlos Zevallos, Juan Gabriel Ruiz Pelaez, Md Ashfaq Ahmed, Zhenwei Zhang, Peter McGranaghan, Sandra Chaparro, and Javier Jimenez
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Medicine ,Science - Abstract
Abstract In the US, racial disparities in hospital outcomes are well documented. We explored whether race was associated with all-cause in-hospital mortality and intensive care unit (ICU) admission among COVID-19 patients in California. This was a retrospective analysis of California State Inpatient Database during 2020. Hospitalizations ≥ 18 years of age for COVID-19 were included. Cox proportional hazards with mixed effects were used for associations between race and in-hospital mortality. Logistic regression was used for the association between race and ICU admission. Among 87,934 COVID-19 hospitalizations, majority were Hispanics (56.5%), followed by White (27.3%), Asian, Pacific Islander, Native American (9.9%), and Black (6.3%). Cox regression showed higher mortality risk among Hispanics, compared to Whites (hazard ratio, 0.91; 95% CI 0.87–0.96), Blacks (hazard ratio, 0.87; 95% CI 0.79–0.94), and Asian, Pacific Islander, Native American (hazard ratio, 0.89; 95% CI 0.83–0.95). Logistic regression showed that the odds of ICU admission were significantly higher among Hispanics, compared to Whites (OR, 1.70; 95% CI 1.67–1.74), Blacks (OR, 1.70; 95% CI 1.64–1.78), and Asian, Pacific Islander, Native American (OR, 1.82; 95% CI 1.76–1.89). We found significant disparities in mortality among COVID-19 hospitalizations in California. Hispanics were the worst affected with the highest mortality and ICU admission rates.
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- 2023
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31. La construcción de la infancia en Guapi: Desarrollo infantil y agencia desde una perspectiva cultural
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Luisa Pelaez Cordoba
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infancia ,cultura ,prácticas de crianza ,desarrollo del niño ,afrodescendiente ,Education - Abstract
Este artículo tiene como objetivo caracterizar cómo los niños y niñas de Guapi se apropian de los ofrecimientos culturales y agencian posibilidades para la construcción de su desarrollo. Se recopila información acerca de algunas formas de estudiar y percibir la infancia a lo largo del siglo XX y XXI, evidenciando que han surgido nuevas miradas alrededor de la infancia, que consideran la cultura como eje transversal en la vida de niños y niñas. La información se recopiló a través de observaciones, entrevistas y conversaciones cotidianas con niñas, niños y adultos cuya ocupación estuviera directamente relacionada con la infancia en el municipio de Guapi, Cauca. Los datos se analizaron a la luz de enfoques teóricos desde la antropología de la infancia y la psicología cultural del desarrollo, como el agenciamiento infantil, participación guiada y la construcción sociocultural de la infancia. Los resultados de esta investigación nos permiten acercarnos al reconocimiento de los niños y niñas como actores sociales protagónicos agentes de su experiencia, y a los adultos, en su papel de agentes culturales, como facilitadores y promotores del desarrollo infantil autónomo.
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- 2023
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32. Neuronal dysfunction caused by FUSR521G promotes ALS-associated phenotypes that are attenuated by NF-κB inhibition
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Mari Carmen Pelaez, Antoine Desmeules, Pauline A. Gelon, Bastien Glasson, Laetitia Marcadet, Alicia Rodgers, Daniel Phaneuf, Silvia Pozzi, Paul A. Dutchak, Jean-Pierre Julien, and Chantelle F. Sephton
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Amyotrophic lateral sclerosis (ALS) ,Frontotemporal dementia (FTD) ,Motor neuron disease (MND) ,Synapse ,Dendrite ,Synaptopathy ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are related neurodegenerative diseases that belong to a common disease spectrum based on overlapping clinical, pathological and genetic evidence. Early pathological changes to the morphology and synapses of affected neuron populations in ALS/FTD suggest a common underlying mechanism of disease that requires further investigation. Fused in sarcoma (FUS) is a DNA/RNA-binding protein with known genetic and pathological links to ALS/FTD. Expression of ALS-linked FUS mutants in mice causes cognitive and motor defects, which correlate with loss of motor neuron dendritic branching and synapses, in addition to other pathological features of ALS/FTD. The role of ALS-linked FUS mutants in causing ALS/FTD-associated disease phenotypes is well established, but there are significant gaps in our understanding of the cell-autonomous role of FUS in promoting structural changes to motor neurons, and how these changes relate to disease progression. Here we generated a neuron-specific FUS-transgenic mouse model expressing the ALS-linked human FUSR521G variant, hFUSR521G/Syn1, to investigate the cell-autonomous role of FUSR521G in causing loss of dendritic branching and synapses of motor neurons, and to understand how these changes relate to ALS-associated phenotypes. Longitudinal analysis of mice revealed that cognitive impairments in juvenile hFUSR521G/Syn1 mice coincide with reduced dendritic branching of cortical motor neurons in the absence of motor impairments or changes in the neuromorphology of spinal motor neurons. Motor impairments and dendritic attrition of spinal motor neurons developed later in aged hFUSR521G/Syn1 mice, along with FUS cytoplasmic mislocalisation, mitochondrial abnormalities and glial activation. Neuroinflammation promotes neuronal dysfunction and drives disease progression in ALS/FTD. The therapeutic effects of inhibiting the pro-inflammatory nuclear factor kappa B (NF-κB) pathway with an analog of Withaferin A, IMS-088, were assessed in symptomatic hFUSR521G/Syn1 mice and were found to improve cognitive and motor function, increase dendritic branches and synapses of motor neurons, and attenuate other ALS/FTD-associated pathological features. Treatment of primary cortical neurons expressing FUSR521G with IMS-088 promoted the restoration of dendritic mitochondrial numbers and mitochondrial activity to wild-type levels, suggesting that inhibition of NF-κB permits the restoration of mitochondrial stasis in our models. Collectively, this work demonstrates that FUSR521G has a cell-autonomous role in causing early pathological changes to dendritic and synaptic structures of motor neurons, and that these changes precede motor defects and other well-known pathological features of ALS/FTD. Finally, these findings provide further support that modulation of the NF-κB pathway in ALS/FTD is an important therapeutic approach to attenuate disease.
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- 2023
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33. High resolution seafloor thermometry for internal wave and upwelling monitoring using Distributed Acoustic Sensing
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Julián David Pelaez Quiñones, Anthony Sladen, Aurelien Ponte, Itzhak Lior, Jean-Paul Ampuero, Diane Rivet, Samuel Meulé, Frédéric Bouchette, Ivane Pairaud, and Paschal Coyle
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Medicine ,Science - Abstract
Abstract Temperature is an essential oceanographic variable (EOV) that still today remains coarsely resolved below the surface and near the seafloor. Here, we gather evidence to confirm that Distributed Acoustic Sensing (DAS) technology can convert tens of kilometer-long seafloor fiber-optic telecommunication cables into dense arrays of temperature anomaly sensors having millikelvin (mK) sensitivity, thus allowing to monitor oceanic processes such as internal waves and upwelling with unprecedented detail. Notably, we report high-resolution observations of highly coherent near-inertial and super-inertial internal waves in the NW Mediterranean sea, offshore of Toulon, France, having spatial extents of a few kilometers and producing maximum thermal anomalies of more than 5 K at maximum absolute rates of more than 1 K/h. We validate our observations with in-situ oceanographic sensors and an alternative optical fiber sensing technology. Currently, DAS only provides temperature changes estimates, however practical solutions are outlined to obtain continuous absolute temperature measurements with DAS at the seafloor. Our observations grant key advantages to DAS over established temperature sensors, showing its transformative potential for the description of seafloor temperature fluctuations over an extended range of spatial and temporal scales, as well as for the understanding of the evolution of the ocean in a broad sense (e.g. physical and ecological). Diverse ocean-oriented fields could benefit from the potential applications of this fast-developing technology.
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- 2023
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34. Activation of multiple Eph receptors on neuronal membranes correlates with the onset of optic neuropathy
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Thomas A. Strong, Juan Esquivel, Qikai Wang, Paul J. Ledon, Hua Wang, Gabriel Gaidosh, David Tse, and Daniel Pelaez
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Optic neuropathy ,Ephrin signaling ,Eph receptor ,Axonal guidance ,Neuropathy ,Neurodegeneration ,Ophthalmology ,RE1-994 - Abstract
Abstract Background Optic neuropathy is a major cause of irreversible blindness, yet the molecular determinants that contribute to neuronal demise have not been fully elucidated. Several studies have identified ‘ephrin signaling’ as one of the most dysregulated pathways in the early pathophysiology of optic neuropathy with varied etiologies. Developmentally, gradients in ephrin signaling coordinate retinotopic mapping via repulsive modulation of cytoskeletal dynamics in neuronal membranes. Little is known about the role ephrin signaling plays in the post-natal visual system and its correlation with the onset of optic neuropathy. Methods Postnatal mouse retinas were collected for mass spectrometry analysis for erythropoietin-producing human hepatocellular (Eph) receptors. Optic nerve crush (ONC) model was employed to induce optic neuropathy, and proteomic changes during the acute phase of neuropathic onset were analyzed. Confocal and super-resolution microscopy determined the cellular localization of activated Eph receptors after ONC injury. Eph receptor inhibitors assessed the neuroprotective effect of ephrin signaling modulation. Results Mass spectrometry revealed expression of seven Eph receptors (EphA2, A4, A5, B1, B2, B3, and B6) in postnatal mouse retinal tissue. Immunoblotting analysis indicated a significant increase in phosphorylation of these Eph receptors 48 h after ONC. Confocal microscopy demonstrated the presence of both subclasses of Eph receptors within the retina. Stochastic optical reconstruction microscopy (STORM) super-resolution imaging combined with optimal transport colocalization analysis revealed a significant co-localization of activated Eph receptors with injured neuronal cells, compared to uninjured neuronal and/or injured glial cells, 48 h post-ONC. Eph receptor inhibitors displayed notable neuroprotective effects for retinal ganglion cells (RGCs) after six days of ONC injury. Conclusions Our findings demonstrate the functional presence of diverse Eph receptors in the postnatal mammalian retina, capable of modulating multiple biological processes. Pan-Eph receptor activation contributes to the onset of neuropathy in optic neuropathies, with preferential activation of Eph receptors on neuronal processes in the inner retina following optic nerve injury. Notably, Eph receptor activation precedes neuronal loss. We observed a neuroprotective effect on RGCs upon inhibiting Eph receptors. Our study highlights the importance of investigating this repulsive pathway in early optic neuropathies and provides a comprehensive characterization of the receptors present in the developed retina of mice, relevant to both homeostasis and disease processes.
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- 2023
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35. Eucalyptus Essential Oil Inhibits Cell Infection by SARS-CoV-2 Spike Pseudotyped Lentivirus
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Sara Alonso Fernandez, Hector F. Pelaez-Prestel, Alvaro Ras-Carmona, Juan Mozas-Gutierrez, Raquel Reyes-Manzanas, and Pedro A. Reche
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COVID-19 ,SARS-CoV-2 ,pseudovirus ,eucalyptus essential oil ,eucalyptol ,infection inhibition assay ,Biology (General) ,QH301-705.5 - Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remains a public health concern due to infections with new SARS-CoV-2 variants. Therefore, finding effective preventive and therapeutic treatments against all SARS-CoV-2 variants is of great interest. In this study, we examined the capacity of eucalyptus essential oil (EEO) and eucalyptol (EOL) to prevent SARS-CoV-2 infection, using as a model SARS-CoV-2 Spike pseudotyped lentivirus (SARS-CoV-2 pseudovirus) and 293T cells transfected with human angiotensin-converting enzyme 2 (hACE2-293T cells). First, we determined the cytotoxicity of EEO and EOL using the MTT colorimetric assay, selecting non-cytotoxic concentrations ≤ 0.1% (v/v) for further analysis. Subsequently, we evaluated the capacity of EEO and EOL in cell cultures to preclude infection of hACE2-293T cells by SARS-CoV-2 pseudovirus, using a luciferase-based assay. We found that EEO and EOL significantly reduced SARS-CoV-2 pseudovirus infection, obtaining IC50 values of 0.00895% and 0.0042% (v/v), respectively. Likewise, EEO and EOL also reduced infection by vesicular stomatitis virus (VSV) pseudovirus, although higher concentrations were required. Hence, EEO and EOL may be able to inhibit SARS-CoV-2 infection, at least partially, through a Spike-independent pathway, supporting the implementation of aromatherapy with these agents as a cost-effective antiviral measure.
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- 2024
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36. Three-Dimensional Bioprinting: A Comprehensive Review for Applications in Tissue Engineering and Regenerative Medicine
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Nicholas A. Mirsky, Quinn T. Ehlen, Jason A. Greenfield, Michael Antonietti, Blaire V. Slavin, Vasudev Vivekanand Nayak, Daniel Pelaez, David T. Tse, Lukasz Witek, Sylvia Daunert, and Paulo G. Coelho
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3D bioprinting ,regenerative medicine ,tissue engineering ,surgical implants ,bioinks ,orthopedic surgery ,Technology ,Biology (General) ,QH301-705.5 - Abstract
Since three-dimensional (3D) bioprinting has emerged, it has continuously to evolved as a revolutionary technology in surgery, offering new paradigms for reconstructive and regenerative medical applications. This review highlights the integration of 3D printing, specifically bioprinting, across several surgical disciplines over the last five years. The methods employed encompass a review of recent literature focusing on innovations and applications of 3D-bioprinted tissues and/or organs. The findings reveal significant advances in the creation of complex, customized, multi-tissue constructs that mimic natural tissue characteristics, which are crucial for surgical interventions and patient-specific treatments. Despite the technological advances, the paper introduces and discusses several challenges that remain, such as the vascularization of bioprinted tissues, integration with the host tissue, and the long-term viability of bioprinted organs. The review concludes that while 3D bioprinting holds substantial promise for transforming surgical practices and enhancing patient outcomes, ongoing research, development, and a clear regulatory framework are essential to fully realize potential future clinical applications.
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- 2024
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37. Decompressive Hemicraniectomy without Evacuation of Acute Intraparenchymal Hemorrhage
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Cristóbal Blanco-Acevedo, Eduardo Aguera-Morales, Antonio C. Fuentes-Fayos, Nazareth Pelaez-Viña, Rosa Diaz-Pernalete, Nazaret Infante-Santos, Ana Muñoz-Jurado, Manuel F. Porras-Pantojo, Alejandro Ibáñez-Costa, Raúl M. Luque, and Juan Solivera-Vela
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intracerebral hemorrhage ,intraparenchymal hematoma ,decompressive craniectomy ,clot evacuation ,Biology (General) ,QH301-705.5 - Abstract
Background: Intracerebral hemorrhages (ICHs) are prevalent, with high morbidity and mortality. We analyzed whether decompressive craniectomy (DC) without evacuation of the acute intraparenchymal hematoma could produce better functional outcomes than treatment with evacuation. Methods: Patients with acute ICH treated with DC without clot evacuation, or evacuation with or without associated craniectomy were included. Matched univariate analyses were performed, and a binary logistic regression model was constructed using the Glasgow Outcome Scale (GOS) and modified Rankin scale (mRS) as dependent variables. Results: 27 patients treated with DC without clot evacuation were compared to 36 patients with clot evacuation; eleven of the first group were matched with 18 patients with evacuation. A significantly better functional prognosis in the group treated with DC without clot evacuation was found. Patients aged < 55 years and treated with DC without clot evacuation had a significantly better functional prognosis (p = 0.008 and p = 0.039, respectively). In multivariate analysis, the intervention performed was the greatest predictor of functional status at the end of follow-up. Conclusions: DC without clot evacuation improves the functional prognosis of patients with acute intraparenchymal hematomas. Larger multicenter studies are warranted to determine whether a change in the management of acute ICH should be recommended.
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- 2024
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38. Cognitive outcome of 458 children over 25 years of neonatal screening for congenital hypothyroidism
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Julita Maria Pelaez, Juliana Cristina Romero Rojas-Ramos, Mouseline Torquato Domingos, Marcella Rabassi de Lima, Gabriela de Carvalho Kraemer, Adriane de Andre Cardoso-Demartini, Rosana Marques Pereira, Luiz de Lacerda, and Suzana Nesi-França
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Congenital hypothyroidism ,Wechsler scales ,Psychometrics ,Neonatal screening ,Maternal education level ,Pediatrics ,RJ1-570 - Abstract
Objectives: To describe the neurocognitive profile of 458 children with congenital hypothyroidism detected by neonatal screening, followed under the same treatment protocol over 25 years. To correlate estimated full-scale IQ (FSIQ) scores with age at the start of treatment, disease severity, and maternal education. Methods: Observational, analytical, retrospective, and longitudinal cohort study, that evaluated children detected between 1991 and 2014, who underwent at least one psychometric assessment (WPPSI- R and/or WISC-III). Estimated FSIQ scores are described and correlated with prognosis determinants. Results: Median T4 at diagnosis was 2.8 μg/dL (0.0–16.5), the median age at the start of treatment was 18.5 days (3–309). Maternal education (n = 445): 2.7% of illiteracy, 59.8% with basic education. Estimated FSIQ scores were 88.0 (±11.8) in WPPSI-R (age 5.6 ± 0.5 years) and 84.1 (±13.0) in WISC-III (age 9.1 ± 1.4 years). The intellectual deficit was identified in 11.6%. Correlation between age at the start of treatment and estimated FSIQ was found only in the WPPSI-R test (p = 0.02). Initial T4 and maternal education significantly correlated with estimated FSIQ scores in both tests, with the latter being the most important determining factor. Conclusions: In this large cohort of mainly low socioeconomic status children, most children achieved normal cognitive levels; however, a significant percentage presented with below-average estimated FSIQ scores and intellectual deficits. Maternal education was the main determining factor in cognitive level followed by hypothyroidism severity.
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- 2023
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39. How to mobilise users' experiential knowledge in the evaluation of advanced technologies and practices in Quebec? The example of the permanent users' and relatives' panel
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Marie‐Pascale Pomey, Sandra Pelaez, Enora Le Roux, Oliver Demers‐Payette, Marie‐Claude Sirois, Louis Lochhead, Isabelle Ganache, Louise Normandin, Audrey L'Espérance, and Michèle deGuise
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evaluation ,health technology assessment agency ,social services ,users' experiences ,users' panel ,users' perspective ,Medicine (General) ,R5-920 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Introduction With the purpose of supporting scientific professionals and helping them to better integrate the expertise of users in their work, a users' and relatives' panel (URP) was set up at the National Institute for Excellence in Health and Social Services in Quebec (INESSS), Canada for the social services and mental health directorate. URPs are advisory structures that mobilise the experiential knowledge of people affected by various issues. Objectives The objective of this study is to assess from a diverse stakeholders' perceptions: (1) the experience of developing and implementing the URP within the context of an Agencies for Health Technology Assessment and Assessment of Social Services (AHTAASS), (2) the contribution of such a URP, (3) the challenges encountered and (4) the perspectives of improvement for the following years. Methodology We conducted a qualitative descriptive evaluation study. Nineteen interviews were conducted: six with URP members and 13 with staff representatives. The documents related to the creation of the panel, the URP minutes summarising the discussions and the reports published during that period were collected and analysed. Following a preliminary round of data analysis, a debriefing meeting was conducted with a few participants to validate the results. Results The panel was set up as part of the INESSS' desire to better integrate experiential knowledge into its recommendations. Twelve projects were presented to the panel on various themes. The URP enabled health professionals to consider dimensions they had not identified, to better integrate the experiential data collected from users into their work and to develop recommendations that made more sense to users. Panel members and INESSS professionals learned to work together, moving the working methods from consultation to collaboration and even coconstruction. Based on the panel's significant contribution, the INESSS decided to maintain it and to strengthen its place in its system to better integrate the experiential knowledge of users into its work. Conclusion This research illustrates how AHTAASS can set up a URP composed exclusively of users, and how it can contribute and be evaluated. It shows that URPs are structures that value the sharing of experiential knowledge of its members, humanise decision‐making and give meaning to the work done by scientific professionals. Patient or Public Contribution One patient–researcher has contributed to the preparation and writing of this manuscript.
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- 2024
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40. Non-coronary atherosclerosis: a marker of poor prognosis in patients undergoing coronary artery bypass surgery
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Óscar González-Lorenzo, Juan A. Franco Pelaez, Andrea Kallmeyer, Luis Nieto, Laura Esteban, Ana Pello, Álvaro Aceña, Gonzalo Aldamiz, and José Tuñón
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peripheral artery disease (PAD) ,stroke ,transient ischaemic attack (TIA) ,coronary artery bypass grafting (CABG) ,cardiovascular risk factors ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
IntroductionThe presence of non-coronary atherosclerosis (NCA) in patients with coronary artery disease is associated with a poor prognosis. We have studied whether NCA is also a predictor of poorer outcomes in patients undergoing coronary artery bypass grafting (CABG).Materials and methodsThis is an observational study involving 567 consecutive patients who underwent CABG. Variables and prognosis were analysed based on the presence or absence of NCA, defined as previous stroke, transient ischaemic attack (TIA), or peripheral artery disease (PAD) [lower extremity artery disease (LEAD), carotid disease, previous lower limb vascular surgery, or abdominal aortic aneurysm (AAA)]. The primary outcome was a combination of TIA/stroke, acute myocardial infarction, new revascularization procedure, or death. The secondary outcome added the need for LEAD revascularization or AAA surgery.ResultsOne-hundred thirty-eight patients (24%) had NCA. Among them, traditional cardiovascular risk factors and older age were more frequently present. At multivariate analysis, NCA [hazard ratio (HR) = 1.84, 95% confidence interval (CI) 1.27–2.69], age (HR = 1.35, 95% CI 1.09–1.67, p = 0.004), and diabetes mellitus (HR = 1.50, 95% CI 1.05–2.15, p = 0.025), were positively associated with the development of the primary outcome, while estimated glomerular filtration rate (HR = 0.86, 95% CI 0.80–0.93, p = 0.001) and use of left internal mammary artery (HR = 0.36, 95% CI 0.15–0.82, p = 0.035), were inversely associated with this outcome. NCA was also an independent predictor of the secondary outcome. Mortality was also higher in NCA patients (27.5% vs. 9%, p
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- 2024
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41. In vitro evaluation of the osteogenic and antimicrobial potential of porous wollastonite scaffolds impregnated with ethanolic extracts of propolis
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Ana Isabel Moreno Florez, Sarita Malagon, Sebastian Ocampo, Sara Leal-Marin, Edgar Alexander Ossa, Birgit Glasmacher, Claudia Garcia, and Alejandro Pelaez-Vargas
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bone tissue engineering ,3D printing ,human bone marrow stem cells ,antimicrobial activity ,wollastonite ,Biotechnology ,TP248.13-248.65 - Abstract
Context: The development of porous devices using materials modified with various natural agents has become a priority for bone healing processes in the oral and maxillofacial field. There must be a balance between the proliferation of eukaryotic and the inhibition of prokaryotic cells to achieve proper bone health. Infections might inhibit the formation of new alveolar bone during bone graft augmentation.Objective: This study aimed to evaluate the in vitro osteogenic behavior of human bone marrow stem cells and assess the antimicrobial response to 3D-printed porous scaffolds using propolis-modified wollastonite.Methodology: A fractional factorial design of experiments was used to obtain a 3D printing paste for developing scaffolds with a triply periodic minimal surface (TPMS) gyroid geometry based on wollastonite and modified with an ethanolic propolis extract. The antioxidant activity of the extracts was characterized using free radical scavenging methods (DPPH and ABTS). Cell proliferation and osteogenic potential using Human Bone Marrow Stem Cells (bmMSCs) were assessed at different culture time points up to 28 days. MIC and inhibition zones were studied from single strain cultures, and biofilm formation was evaluated on the scaffolds under co-culture conditions. The mechanical strength of the scaffolds was evaluated.Results: Through statistical design of experiments, a paste suitable for printing scaffolds with the desired geometry was obtained. Propolis extracts modifying the TPMS gyroid scaffolds showed favorable cell proliferation and metabolic activity with osteogenic potential after 21 days. Additionally, propolis exhibited antioxidant activity, which may be related to the antimicrobial effectiveness of the scaffolds against S. aureus and S. epidermidis cultures. The mechanical properties of the scaffolds were not affected by propolis impregnation.Conclusion: These results demonstrate that propolis-impregnated porous wollastonite scaffolds might have the potential to stimulate bone repair in maxillofacial tissue engineering applications.
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- 2024
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42. Linking Cause and Effect: Nanoscale Vibrational Spectroscopy of Space Weathering from Asteroid Ryugu
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Sylvain Laforet, Corentin Le Guillou, Francisco de la Peña, Michael Walls, Luiz H. G. Tizei, Maya Marinova, Pierre Beck, Van T. H. Phan, Damien Jacob, Bahae-eddine Mouloud, Daniel Hallatt, Mario Pelaez-Fernandez, Jean-Christophe Viennet, David Troadec, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Hisayoshi Yurimoto, and Hugues Leroux
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Space weather ,Asteroid surfaces ,Remote sensing ,Small Solar System bodies ,Vibrational spectroscopy ,Infrared spectroscopy ,Astrophysics ,QB460-466 - Abstract
Airless bodies are subjected to space-weathering effects that modify the first few microns of their surface. Therefore, understanding their impact on the optical properties of asteroids is key to the interpretation of their color variability and infrared reflectance observations. The recent Hayabusa2 sample return mission to asteroid Ryugu offers the first opportunity to study these effects, in the case of the most abundant spectral type among the main-asteroid belt, C-type objects. This study employs vibrational electron energy-loss spectroscopy in the transmission electron microscope to achieve the spatial resolution required to measure the distinct mid-infrared spectral signature of Ryugu's space-weathered surface. The comparison with the spectrum of the pristine underlying matrix reveals the loss of structural -OH and C-rich components in the space-weathered layers, providing direct experimental evidence that exposure to the space environment tends to mask the optical signatures of phyllosilicates and carbonaceous matter. Our findings should contribute to rectifying potential underestimations of water and carbon content of C-type asteroids when studied through remote sensing with new-generation telescopes.
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- 2024
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43. Facial emotion recognition through artificial intelligence
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Jesús A. Ballesteros, Gabriel M. Ramírez V., Fernando Moreira, Andrés Solano, and Carlos A. Pelaez
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facial emotion ,recognition ,A.I. ,convolutional neural network ,images ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
This paper introduces a study employing artificial intelligence (AI) to utilize computer vision algorithms for detecting human emotions in video content during user interactions with diverse visual stimuli. The research aims to unveil the creation of software capable of emotion detection by leveraging AI algorithms and image processing pipelines to identify users' facial expressions. The process involves assessing users through images and facilitating the implementation of computer vision algorithms aligned with psychological theories defining emotions and their recognizable features. The study demonstrates the feasibility of emotion recognition through convolutional neural networks (CNN) and software development and training based on facial expressions. The results highlight successful emotion identification; however, precision improvement necessitates further training for contexts with more diverse images and additional algorithms to distinguish closely related emotional patterns. The discussion and conclusions emphasize the potential of A.I. and computer vision algorithms in emotion detection, providing insights into software development, ongoing training, and the evolving landscape of emotion recognition technology. Further training is necessary for contexts with more diverse images, alongside additional algorithms that can effectively distinguish between facial expressions depicting closely related emotional patterns, enhancing certainty and accuracy.
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- 2024
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44. Exploring the impact of the COVID-19 pandemic on healthcare and substance use service access among women who inject drugs: a qualitative study
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Lyra Cooper, Joseph G. Rosen, Leanne Zhang, Danielle Pelaez, Praise F. Olatunde, Jill Owczarzak, Ju Nyeong Park, and Jennifer L. Glick
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COVID-19 ,Substance use ,Women who inject drugs ,Healthcare access ,United States ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The COVID-19 pandemic disrupted healthcare and substance use services engagement, including primary and mental health services as well as residential and outpatient drug treatment. Women who inject drugs (WWID) face known barriers to healthcare and substance use service engagement, which pre-date the COVID-19 pandemic. The impact of COVID-19 on WWID’s engagement with healthcare and substance use services, however, remains understudied. Methods To explore the impact of the COVID-19 pandemic on service-seeking and utilization, we conducted in-depth interviews with 27 cisgender WWID in Baltimore, Maryland, in April–September 2021. Iterative, team-based thematic analysis of interview transcripts identified disruptions and adaptations to healthcare and substance use services during the COVID-19 pandemic. Results The COVID-19 pandemic disrupted service engagement for WWID through service closures, pandemic safety measures restricting in-person service provision, and concerns related to contracting COVID-19 at service sites. However, participants also described various service adaptations, including telehealth, multi-month prescriptions, and expanded service delivery modalities (e.g., mobile and home delivery of harm reduction services), which overwhelmingly increased service engagement. Conclusion To build upon service adaptations occurring during the pandemic and maximize expanded access for WWID, it is vital for healthcare and substance use service providers to continue prioritizing expansion of service delivery modality options, like telehealth and the provision of existing harm reduction services through alternative platforms (e.g., mobile services), that facilitate care continuity and increase coverage.
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- 2023
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45. Entre la tierra prometida y el desarraigo: Migración y Educación en Colombia
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Adriana María Gallego Henao, Leisy Magdali Arroyave Taborda, Oscar Alberto Pelaez Henao, and Diego Alejandro Correa Correa
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educación ,migración ,habilidades para la vida ,imaginarios ,prácticas pedagógicas ,Political science (General) ,JA1-92 ,Social sciences (General) ,H1-99 - Abstract
La presente investigación tiene como objetivo comprender los imaginarios y representaciones construidos por los maestros sobre el fenómeno de la migración y su relación con la educación. Establecida bajo la perspectiva del paradigma cualitativo y enfoque hermenéutico, privilegiándose como estrategia de investigación el estudio de caso, considerando 6 docentes y 6 padres de familia de una Institución Educativa del municipio de Yarumal, Antioquia, Colombia. Entre los resultados destaca que, los imaginarios de los actores educativos frente al fenómeno migratorio se relacionan con la búsqueda de una mejor calidad de vida, que se verá reflejada en oportunidades académicas y laborales. Esto lleva a que las prácticas pedagógicas se enfoquen no solo en la formación en habilidades cognitivas sino también en las sociales, todo ello como condición para convivir en un país afectado por el conflicto social y el desplazamiento interno. En conclusión, el fenómeno del desplazamiento se genera no solo por razones de violencia rural y por el abandono estatal, sino por la búsqueda de una mejor vida; esto genera un reto para la familia y la escuela en tanto estos dos contextos deben asumir educar en coherencia con las necesidades de la población migrante y desplazada.
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- 2023
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46. Safety of oil from Schizochytrium limacinum (strain TKD‐1) for use in infant and follow‐on formula as a novel food pursuant to Regulation (EU) 2015/2283
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EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA), Dominique Turck, Torsten Bohn, Jacqueline Castenmiller, Stefaan De Henauw, Karen Ildico Hirsch‐Ernst, Alexandre Maciuk, Inge Mangelsdorf, Harry J. McArdle, Androniki Naska, Carmen Pelaez, Kristina Pentieva, Alfonso Siani, Frank Thies, Sophia Tsabouri, Marco Vinceti, Margarita Aguilera‐Gómez, Francesco Cubadda, Thomas Frenzel, Marina Heinonen, Miguel Prieto Maradona, Rosangela Marchelli, Monika Neuhäuser‐Berthold, Morten Poulsen, Josef Rudolf Schlatter, Alexandros Siskos, Henk vanLoveren, Emanuela Turla, and Helle Katrine Knutsen
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alga ,docosahexaenoic acid (DHA) ,fatty acid ,infants and young children ,novel foods ,safety ,Nutrition. Foods and food supply ,TX341-641 ,Chemical technology ,TP1-1185 - Abstract
Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on the safety of Schizochytrium sp. (TKD‐1) oil as a novel food (NF) pursuant to Regulation (EU) 2015/2283. Schizochytrium sp. is a single‐cell microalga. The strain TKD‐1, used by the applicant (ATK Biotech Co. Ltd.), belongs to the species Schizochytrium limacinum. The NF is a mixture of triglycerides in which docosahexaenoic acid (DHA) represents 53%–61% of fatty acids. The applicant proposed to use the NF in infant formulae (IF) and follow‐on formulae (FOF). The use levels proposed by the applicant were derived from Regulation (EU) 2016/127, which states the mandatory addition of DHA to IF and FOF at the level of 20–50 mg/100 kcal. S. limacinum was attributed the qualified presumption of safety (QPS) status with the qualification ‘for production purposes only’. Data provided by the applicant demonstrated the absence of viable cells in the NF. No toxicological studies were performed with the NF. However, based on the available toxicological data on oils derived from Schizochytrium sp., the QPS status of the source of the NF, the production process, the composition of the NF and the absence of marine biotoxins and viable cells in the NF, the Panel considers there are no concerns with regard to toxicity of the NF. The Panel concludes that the NF is safe under the proposed conditions of use.
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- 2023
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47. Safety of oil from Schizochytrium sp. (strain CABIO‐A‐2) for use in infant and follow‐on formula as a novel food pursuant to Regulation (EU) 2015/2283
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EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA), Dominique Turck, Torsten Bohn, Jacqueline Castenmiller, Stefaan De Henauw, Karen Ildico Hirsch‐Ernst, Alexandre Maciuk, Inge Mangelsdorf, Harry J. McArdle, Androniki Naska, Carmen Pelaez, Kristina Pentieva, Alfonso Siani, Frank Thies, Sophia Tsabouri, Marco Vinceti, Margarita Aguilera‐Gómez, Francesco Cubadda, Thomas Frenzel, Marina Heinonen, Miguel Prieto Maradona, Rosangela Marchelli, Monika Neuhäuser‐Berthold, Morten Poulsen, Josef Rudolf Schlatter, Alexandros Siskos, Henk vanLoveren, Emanuela Turla, and Helle Katrine Knutsen
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alga ,docosahexaenoic acid (DHA) ,fatty acid ,infants and young children ,novel foods ,safety ,Nutrition. Foods and food supply ,TX341-641 ,Chemical technology ,TP1-1185 - Abstract
Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on the safety of Schizochytrium sp. (strain CABIO‐A‐2) oil as a novel food (NF) pursuant to Regulation (EU) 2015/2283. S. sp. is a single‐cell microalga. The NF is a mixture of triglycerides in which docosahexaenoic acid (DHA) represents 38%–44% of fatty acids. The applicant proposed to use the NF in infant formulae (IF) and follow‐on formulae (FOF). The use levels proposed by the applicant were derived from Regulation (EU) 2016/127, which states the mandatory addition of DHA to IF and FOF at the level of 20–50 mg/100 kcal. The evidence provided demonstrated that the strain S. sp. CABIO‐A‐2 is phylogenetically closely related to the strain S. sp. ATCC 20888. The assessment of some already authorised S. sp. oils in the Union list were also based on similarities with the strain ATCC 20888. The applicant provided a 90‐day repeated dose toxicity study in rats with the NF. No adverse effects were observed up to the highest dose tested, i.e. 10.2 g/kg body weight (bw) per day. Taking into account the toxicity studies performed with the NF and with DHA‐oils derived from strains belonging to the genus Schizochytrium, its phylogenetical profile, the production process, the composition of the NF and the absence of marine biotoxins and viable cells in the NF, the Panel considers that there are no concerns with regard to the toxicity of the NF. The Panel concludes that the NF is safe under the proposed conditions of use.
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- 2023
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48. Resilience outcomes and associated factors among workers in community-based HIV care centres during the Covid-19 pandemic: A multi-country analysis from the EPIC program
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Marion Di Ciaccio, Nicolas Lorente, Virginie Villes, Axel Akpaka Maxence, Claudia Marcela Vargas Pelaez, José Rafael Guillen, Ingrid Castillo, Cinta Folch, Rokhaya Diagne, Lucas Riegel, Rosemary M. Delabre, and Daniela Rojas Castro
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CHW ,COVID-19 crisis ,Mental health ,Resilience ,HIV ,Public aspects of medicine ,RA1-1270 - Abstract
Introduction: Community health workers (CHW) were integral in the COVID-19 response, particularly concerning services for populations vulnerable to HIV. Little is known regarding the mental health of CHW during the COVID-19 crisis. The objective of this study was to study resilience of CHW working in HIV non-governmental organizations. Methods: An anonymous online, cross-sectional questionnaire was implemented during 2021 among CHW in Benin, Colombia, Guatemala, and Spain. Three scales were used to assess mental health: the 6-item Brief-Resilience Scale, the 9-item Patient Scale Questionnaire and the 7‐item Generalized-Anxiety-Disorder scale. Logistic regression models were used to identify factors associated with “low” resilience vs “normal” or “high” resilience. Results: Among 295 respondents, the median standardized resilience score was 58.33 (IQR = [50.0–75.0], n = 267), 18.52 (IQR = [7.4–33.3], n = 282) for standardized depression score and 19.05 (IQR = [4.8–33.3], n = 274) for standardized anxiety score. Standardized resilience score was negatively correlated with standardized anxiety score (rho = -0.49, p
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- 2023
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49. Interrogating perceived relevance and feasibility of HIV pre-exposure prophylaxis: A novel model of PrEP acceptability among cisgender women who inject drugs
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Leanne Zhang, Joseph G. Rosen, Lyra Cooper, Praise F. Olatunde, Danielle Pelaez, Susan G. Sherman, Ju Nyeong Park, and Jennifer L. Glick
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Women who inject drugs ,PrEP care continuum ,Substance use ,HIV prevention ,Qualitative research ,HIV risk environment ,Public aspects of medicine ,RA1-1270 - Abstract
Introduction: Uptake of daily oral HIV pre-exposure prophylaxis (PrEP) remains low among cisgender women who inject drugs (WWID) in the U.S., who experience elevated sexual- and injection-mediated HIV exposure risks. While anticipated barriers to PrEP uptake have been explored, further work is needed to situate PrEP acceptability (i.e., PrEP interest and willingness) within the context of WWID’s lives and the HIV risk environment. Methods: We conducted semi-structured, in-depth interviews (N = 27) with cisgender WWID in Baltimore, Maryland, between April–September 2021. Interviews explored women’s daily survival needs, substance use practices, healthcare experiences, HIV risk perception, and PrEP perspectives. Thematic analysis revealed complex dimensions of WWID’s health perspectives and HIV risk conceptualization, from which a Psychosocial Model of PrEP Acceptability and a novel construct of ‘perceived PrEP relevance’ were developed using a grounded theory approach. Results: In our Psychosocial Model of PrEP Acceptability, anticipated PrEP feasibility and perceived PrEP relevance shape women’s interest in and willingness to initiate PrEP. Attending to PrEP-related healthcare tasks (e.g., medical appointments, bloodwork) and managing a daily medication regimen were anticipated as feasible but would likely be de-prioritized relative to women’s competing substance-related and survival needs. Women’s perceptions of both their locus of HIV risk and sufficiency of existing HIV prevention practices determined their perceived PrEP relevance. PrEP was least relevant for women perceiving their prevention practices as sufficient to mitigate self-controlled HIV risk and most relevant for women perceiving their prevention practices as insufficient to mitigate environmentally shaped HIV risk. Conclusions: Our models demonstrate how PrEP acceptability is influenced by WWID’s lived experiences and complex risk conceptualization. Effective multilevel interventions to enhance PrEP engagement should support women’s competing needs, affirm women’s existing prevention strategies, and address the harms of the HIV risk environment.
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- 2023
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50. Detection of Somatic Alterations in Peritoneal Lavages of Early-Stage Endometrial Carcinoma Patients
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M. Garzón Ibañez, A. Velasco Sanchez, M. Vives Usano, B. García Pelaez, S. Gatius Caldero, S. Muñoz, E. Aldeguer, M. Molina Vila, C. Mayo de las Casas, and F. Matias-Guiu
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Medicine - Published
- 2023
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