2,741 results match your criteria: "Hospital de Clínicas Universidad de Buenos Aires[Affiliation]"

Prenatal diagnosis of congenital anomalies and birth institution complexity levels in Argentina.

J Community Genet

January 2025

Red Nacional de Anomalías Congénitas (RENAC), Instituto Nacional de Epidemiología, ANLIS Malbrán, Buenos Aires, Argentina.

Patiens with major congenital anomalies diagnosed prenatally should be referred to and delivered in institutions with the appropriate level of complexity, as this reduces morbidity and mortality. We aimed to assess the prevalence and prenatal diagnosis proportion of selected congenital abnormalities and the complexity levels of birth institutions in a sample of public maternity hospitals in Argentina. Data sources were (1) National Congenital Anomalies Registry, covering the period from 2013 to 2021; and (2) Categorization of birth institutions according to their complexity (high or low).

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[Not Available].

Vertex

January 2025

Instituto de Investigaciones Facultad de Psicología, Universidad de Buenos Aires. Unidad de Neuropsicología, Hospital Interzonal General de Agudos "Eva Perón", Argentina. https://orcid.org/0000-0003-3196-1675 .

Introducción y objetivo: La Frontal Systems Behavior Scale (FrSBe) es una escala autoadministrable que evalúa cambios comportamentales (apatía, desinhibición y disfunción ejecutiva) luego de una lesión cerebral. El objetivo del trabajo fue obtener indicadores de rendimiento del puntaje total y las sub-escalas de la FrSBe para adultos de habla hispana de la Provincia de Buenos Aires, Argentina, analizar el efecto de variables demográficas y obtener datos normativos del instrumento. Materiales y métodos: se incluyeron 169 participantes y 83 familiares de esos participantes de Buenos Aires que completaron una encuesta para datos demográficos y la versión en español de la FrSBe.

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FhaA plays a key role in mycobacterial polar elongation and asymmetric growth.

mBio

January 2025

Analytical Biochemistry and Proteomics Unit, Instituto de Investigaciones Biológicas Clemente Estable and Institut Pasteur de Montevideo, Montevideo, Uruguay.

Unlabelled: Mycobacteria, including pathogens like , exhibit unique growth patterns and cell envelope structures that challenge our understanding of bacterial physiology. This study sheds light on FhaA, a conserved protein in , revealing its pivotal role in coordinating cell envelope biogenesis and asymmetric growth. The elucidation of the FhaA interactome in living mycobacterial cells reveals its participation in the protein network orchestrating cell envelope biogenesis and cell elongation/division.

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Boosting porphyrin synthesis and ALA-mediated photoinactivation through near-infrared therapy.

Photochem Photobiol

January 2025

Laboratorio de Terapias Fotoasistidas, Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP), Hospital de Clínicas José de San Martín and CONICET, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina.

Photodynamic inactivation (PDI) combines the use of photosensitizers with visible light to produce reactive oxygen species that effectively eliminate pathogens. To investigate the impact of near- infrared therapy (NIRT) on heme biosynthesis and permeability of the pro-photosensitizers 5-aminolevulinic acid (ALA) and Hexyl-ALA (H-ALA) through biofilms, we applied sub-lethal conditions for both NIRT and PDI to maintain intact bacterial viability. During NIRT, the temperature remained below 37°C, permitting rapid heating (ΔT = 11°C) without causing thermal damage.

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Chlorpyrifos induces lung metastases and modulation of cancer stem cell markers in triple negative breast cancer model.

Toxicology

January 2025

Universidad de Buenos Aires-CONICET, Instituto de Química y Fisicoquímica Biológicas "Prof. Alejandro C. Paladini" (IQUIFIB), Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica. Cátedra de Física, Laboratorio de Radioisótopos, Buenos Aires, Argentina. Electronic address:

Breast cancer is a major public health problem, and distant metastases are the main cause of morbidity and mortality. Chlorpyrifos is an organophosphate that promotes Epithelial-Mesenchymal Transition-like phenotype in breast cancer cell lines and modulates the Breast Cancer Stem Cells activating two key processes related to the metastatic cascade. Here, we investigated whether Chlorpyrifos may induce distant metastases in an in vivo triple negative tumor model.

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Update of diagnostic methods in tuberculosis (TB).

Rev Argent Microbiol

January 2025

Servicio de Microbiología, Universidad Católica de Córdoba, Clínica Universitaria Reina Fabiola, Córdoba, Argentina. Electronic address:

The WHO aims to reduce the number of deaths from TB by 95% and decrease its incidence rate by 90% between 2015 and 2035. The recommended rapid diagnostic tests are accurate and cost-effective, allow for a prompt start to treatment, and influence other outcomes that are important to the patient. To detect latent infection, the tuberculin skin test and interferon γ release (IGRA) tests are used.

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Endoscopic endonasal approach for optic Pathway-Hypothalamic Glioma: A pediatric case Report and a Systematic review.

J Clin Neurosci

January 2025

Department of Neurosurgery, Fundación Universitaria de Ciencias de la Salud, Hospital de San José - Sociedad de Cirugía de Bogotá, Bogotá, D.C., Colombia; Department of Neurosurgery, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, D.C., Colombia. Electronic address:

Background: The Endoscopic Endonasal Approach (EEA) has revolutionized the treatment landscape for optic pathway-hypothalamic gliomas (OPHGs) by providing precise visualization of the lesion neuroanatomic and minimizing brain manipulation. Despite the variable clinical trajectories of OPHGs, the optimal management neurosurgical strategy continues to be a subject of debate.

Methods: We present a case of an 8-year-old female with an OPHG who underwent EEA and performed a systematic review search in English and Spanish case reports from January 2007 (date of first reported case) to June 2024, focusing on OPHG treated with EEA.

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[An update of the Helicobacter pylori treatment: a Latin American Gastric Cancer, Helicobacter and Microbiota Study Group review].

Rev Gastroenterol Peru

January 2025

Departamento de Gastroenterología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.

Helicobacter pylori (H. pylori) is the primary etiological agent of gastric adenocarcinoma, which affects over 60% of the global population, with a significant prevalence in Latin America. Given its impact on the affected population, it is crucial to understand the diagnostic tools available for detecting this infection.

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Objective: To determine if the SARC-F tool, used to screen for sarcopenia risk, can also predict mild cognitive impairment (MCI) diagnosed with the Montreal Cognitive Assessment (MoCA) tool.

Methods: This is a sub-analysis of data from a cross-sectional study carried out in postmenopausal women from Latin America (nine countries) in which sociodemographic, clinical, and anthropometric data were collected, and the SARC-F and MoCA tools administered. From the original sample of 1185 women, analysis was performed only among the 772 with natural menopause.

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A Self-supervised Deep Learning Model for Diagonal Sulcus Detection with Limited Labeled Data.

Neuroinformatics

January 2025

Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Buenos Aires, Argentina.

Sulci are a fundamental part of brain morphology, closely linked to brain function, cognition, and behavior. Tertiary sulci, characterized as the shallowest and smallest subtype, pose a challenging task for detection. The diagonal sulcus (ds), located in a crucial area in language processing, has a prevalence between 50% and 60%.

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Chronic hypertension is an increasingly prevalent condition that constitutes a risk factor for superimposed preeclampsia during pregnancy. In this study, we assessed the gut microbiome in a rat model of superimposed preeclampsia to characterize the microbial signature associated with defective placentation processes identified at the preclinical disease stage. The blood pressure profile, renal function parameters and fetal phenotype were evaluated in pregnant Stroke-prone Spontaneously Hypertensive Rats (SHRSP) and their normotensive controls.

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Extreme Phenotypic Variability of -Related Disorders in Hearing Loss.

Adv Genet (Hoboken)

December 2024

Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN) CONICET Buenos Aires 1428 Argentina.

Hearing loss is the most common sensory defect in humans, affecting normal communication. In most cases, hearing loss is a multifactorial disorder caused by both genetic and environmental factors, but single-gene mutations can lead to syndromic or non-syndromic hearing loss. Monoallelic variants in , coding for gamma (γ)-actin, are associated with classical Baraitser-Winter Syndrome type 2 (BRWS2, nonsyndromic deafness, and a variety of clinical presentations not fitting the original BRWS2 description or nonsyndromic deafness.

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Structural inequality, the uneven distribution of resources and opportunities, influences health outcomes. However, the biological embedding of structural inequality in aging and dementia, especially among underrepresented populations, is unclear. We examined the association between structural inequality (country-level and state-level Gini indices) and brain volume and connectivity in 2,135 healthy controls, and individuals with Alzheimer's disease and frontotemporal lobe degeneration from Latin America and the United States.

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Novel allelic variants of bla carried on IncN and IncC plasmids isolated from clinical cases in Argentina: In vivo emergence of bla.

J Glob Antimicrob Resist

December 2024

Servicio Antimicrobianos, INEI-ANLIS 'Dr. Carlos G. Malbrán', National and Regional Reference Laboratory for Antimicrobial Resistance (NRRLAR), Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. Electronic address:

Objective: The OXA-48-like enzymes have the capacity to hydrolyse carbapenems and are members of class D β-lactamases that are primarily detected in Enterobacterales. The allelic variant bla, which has low hydrolytic activity towards carbapenems, was detected in Argentina in 2011 and has spread successfully since then, giving sporadic origin to novel local variants. The aim of this study was to analyse the phenotypic profile and dissemination strategies of two novel OXA enzymes, bla and bla, located in Escherichia coli M17224 and Klebsiella pneumoniae M21014, respectively, isolated from two paediatric patients.

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Multi-Omics Study Reveals Nc886/vtRNA2-1 as a Positive Regulator of Prostate Cancer Cell Immunity.

J Proteome Res

December 2024

Facultad de Ciencias, Universidad de la República, Sección Genómica Funcional, Montevideo 11400, Uruguay.

Noncoding RNA 886 has emerged as a pivotal regulatory RNA with distinct functions across tissues, acting as a regulator of protein activity by directly binding to protein partners. While it is well recognized as a tumor suppressor in prostate cancer, the underlying molecular mechanisms remain elusive. To discover the principal pathways regulated by nc886 in prostate cancer, we used a transcriptomic and proteomic approach analyzing malignant DU145, LNCaP, PC3, and benign RWPE-1 prostate cell line models transiently transfected with in vitro transcribed nc886 or antisense oligonucleotides.

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Melatonin stabilizes atherosclerotic plaques: an association that should be clinically exploited.

Front Med (Lausanne)

December 2024

CENECON, Faculty of Medical Sciences, Universidad de Buenos Aires, and Pontificia Universidad Catolica Argentina, Buenos Aires, Argentina.

Atherosclerosis is the underlying factor in the premature death of millions of humans annually. The cause of death is often a result of the rupture of an atherosclerotic plaque followed by the discharge of the associated molecular debris into the vessel lumen which occludes the artery leading to ischemia of downstream tissue and to morbidity or mortality of the individual. This is most serious when it occurs in the heart (heart attack) or brain (stroke).

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Purpose: Despite the rapid advancements in genomics and the enactment of a new cancer law in Chile, the implementation of cancer genetic counseling continues to face significant challenges because of limited resources and infrastructure.

Methods: We conducted a survey targeting health care providers who offer genetic counseling to patients with cancer and possess training in genetics and counseling. Additionally, we distributed a separate survey to high-risk patients associated with an advocacy group to gather insights on their perceptions of and experiences with cancer genetic counseling.

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Background: Local flaps for breast reconstruction are becoming recognized as a viable alternative to remote flaps.

Objectives: The purpose of this manuscript is to describe the anatomy and clinical outcomes using the internal mammary artery perforators and the lateral intercostal artery perforator flaps for breast reconstruction.

Methods: Twelve cadaveric specimens were injected with colored latex and dissected to demonstrate the medial perforators of the 5th intercostal space.

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[Identification and antibiotic susceptibility of Aeromonas spp. in a University Hospital in the city of Buenos Aires].

Rev Argent Microbiol

December 2024

Departamento de Bioquímica Clínica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Hospital de Clínicas «José de San Martín», Buenos Aires, Argentina. Electronic address:

Aeromonas spp. are opportunistic pathogens that cause both intra- and extraintestinal infections. The objective of this work was the phenotypic and genotypic characterization of a collection of Aeromonas strains, in addition to determining their sensitivity to different antimicrobials.

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Development of smart films based on soy protein and cow horn dissolved in a deep eutectic solvent: Physicochemical and environmental assessment.

Int J Biol Macromol

December 2024

BIOMAT Research Group, University of the Basque Country (UPV/EHU), Escuela de Ingeniería de Gipuzkoa, Europa Plaza 1, 20018 Donostia-San Sebastián, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain; Proteinmat Materials SL, Avenida de Tolosa 72, 20018 Donostia-San Sebastián, Spain. Electronic address:

With the urge to reduce the use of petroleum-based materials, the aim of this work is to valorize biowaste to develop smart films through a sustainable fabrication way. In this regard, choline chloride/urea (1:2) deep eutectic solvent (DES) at different concentrations (25, 40, 50 and 75 wt%) was used to dissolve cow horn, used as reinforcement agent in soy protein films. The film fabrication was carried out by compression molding, a fast and cost-effective.

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Candidemia is the predominant form of invasive candidiasis and the most frequently occurring serious fungal infection in critically ill patients in Intensive Care Units (ICU). Studies carried out in Latin America reveal a higher incidence of candidemia and higher mortality rates when compared to North America or Europe. This highlights the need to develop guidelines for correctly diagnosing and treating candidemia in critically ill patients in the ICU.

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Background: Distinct clinical course patterns have been identified between AQP4-IgG-positive and AQP4-IgG-negative NMOSD patients.

Objectives: This study aimed to evaluate the differences between AQP4-IgG-seropositive and AQP4-IgG-seronegative NMOSD patients in a single centre in Argentina.

Methods: We performed a retrospective cross-sectional study of 108 NMOSD patients in the city of Buenos Aires, Argentina.

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Introduction. Health-related quality of life (HRQL) and its social consequences have not been evaluated in adults who started renal replacement therapy (RRT) in childhood/adolescence and are currently on hemodialysis. Population and methods.

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The elimination of endemic rubella and measles transmission in the Region of the Americas was verified by the Pan American Health Organization's (PAHO) Regional Verification Commission in 2015 and 2016, respectively. Upon achieving this success, this Commission was disbanded. Shortly afterwards, the Region faced challenges in the post-elimination era, notably responding to and stopping transmission of imported measles cases.

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Late Bone Marrow Mononuclear Cell Transplantation in Rats with Sciatic Nerve Crush: Analysis of a Potential Therapeutic Time Window.

Int J Mol Sci

November 2024

Cátedra de Química Biológica Patológica, Departamento de Química Biológica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1113AAD, Argentina.

After peripheral nerve injury, axon and myelin regeneration are key events for optimal clinical improvements. We have previously shown that early bone marrow mononuclear cell (BMMC) transplantation exerts beneficial effects on myelin regeneration. In the present study, we analyze whether there is a temporal window in which BMMCs migrate more efficiently to damaged nerves while still retaining their positive effects.

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