106 results match your criteria: "Austral University of Chile[Affiliation]"

Anti-inflammatory and antinociceptive effects of LQFM275 - A new multi-target drug.

Int Immunopharmacol

December 2024

Laboratory of Pharmacology of Natural and Synthetic Products, Institute of Biological Sciences, Federal University of Goiás, Campus Samambaia, Goiânia, Brazil.

Compound (4-(3,5-di-tert-butyl-4-hydroxybenzylamine)benzenesulfonamide) (LQFM275) was designed and synthesized from darbufelone and sulfanilamide as a new multi-target for the treatment of inflammatory diseases. LQFM275 showed a great range of safe cytotoxicity profile (100-400 μM) evaluated by MTT assay, preventing damage induced by lipopolysaccharide (LPS) in EA.hy926 cell line.

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Although a lack of diversity in genetic studies is an acknowledged obstacle for personalized medicine and precision public health, Latin American populations remain particularly understudied despite their heterogeneity and mixed ancestry. This gap extends to COVID-19 despite its variability in susceptibility and clinical course, where ethnic background appears to influence disease severity, with non-Europeans facing higher hospitalization rates. In addition, access to high-quality samples and data is a critical issue for personalized and precision medicine, and it has become clear that the solution lies in biobanks.

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Article Synopsis
  • Alpacas exhibit unique reproductive traits, including induced ovulation and differences in uterine horn gestation rates, but challenges like low fertility and high embryonic mortality persist, prompting further study of the uterine wall changes during the luteal phase.
  • The research aimed to investigate histological changes in the uterine wall of alpacas, analyzing samples from both left and right uterine horns after inducing ovulation via GnRH or natural mating.
  • Results indicated that copulation (G2) led to thicker uterine layers and larger gland areas in the left horn, suggesting better developmental conditions during the luteal phase, and highlighting new insights into alpaca reproductive physiology.
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Apical lesions are diseases of infectious origin that can cause destruction of the surrounding periapical tissue, including bone tissue and periodontal ligaments, resulting in the loss of the affected teeth. Currently, the microorganisms present in pulp and apical disease are mostly studied as bacteria. However, in recent years, interest has been aroused in the study of viruses that could be present in apical lesions, and how these could affect the progression of disease.

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Global needs for nitrogen fertilizer to improve wheat yield under climate change.

Nat Plants

July 2024

Technical University of Munich, Department of Life Science Engineering, Digital Agriculture, HEF World Agricultural Systems Center, Freising, Germany.

Article Synopsis
  • * Research using advanced wheat simulation models indicates improved wheat genotypes can boost yields by 16% using current nitrogen fertilizer levels.
  • * To reach a potential 52% increase in yield under severe climate change conditions, nitrogen fertilizer use would need to quadruple, which could exacerbate environmental impacts, highlighting the need for better nitrogen management.
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Mammals in drylands face environmental challenges exacerbated by climate change. Currently, human activity significantly impacts these environments, and its effects on the energy demands experienced by individuals have not yet been determined. Energy demand in organisms is managed through elevations in glucocorticoid levels, which also vary with developmental and health states.

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Article Synopsis
  • - The study analyzed the thermal performance curve (TPC) of five species of amphibia (Eupsophus) in southern Chile, focusing on how temperature affects their locomotor abilities under different environmental conditions.
  • - Results indicated that these species have relatively consistent thermal responses, showing narrow thermal windows for activity compared to other local species, while also exhibiting significant individual differences in performance across varying temperatures.
  • - The research suggested a trade-off between thermal tolerance and locomotor performance, hinting that species with broader temperature ranges may experience reduced performance, and these traits are influenced by body size, raising ecological questions.
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The aim was to evaluate the concurrent validity and reliability of the Resistance Intensity Scale for Exercise [RISE], which uses verbal descriptors, to quantify the intensity in velocity-based training with elastic bands. Eighteen trained volunteers performed parallel squats at maximum speed at 40%, 55%, 70%, and 85%1RM in four sessions, two for familiarization and two for reliability. Each set was stopped at a 10% intra-set velocity loss.

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An environmentally friendly method for the release of cocoa bean shell (CBS) extracts is proposed in this paper. This work aims to investigate the effect of pulsed electric field (PEF) pre-treatment on subsequent solid-liquid extraction (SLE) of metabolites with choline chloride-lactic acid natural deep eutectic solvent (NaDES) and bioactivity of cocoa bean shell (CBS) extract. Two different media for PEF application were evaluated: water and chlorine chloride-lactic acid.

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This study aimed to compare the mechanical (lifting velocity and maximum number of repetitions), physiological (muscular activation, lactate, heart rate, and blood pressure), and psychological (rating of perceived exertion) responses to upper-body pushing exercises performed wearing a sports elastomeric garment or a placebo garment. Nineteen physically active young adults randomly completed two training sessions that differed only in the sports garment used (elastomeric technology or placebo). In each session, subjects performed one set of seated shoulder presses and another set of push-ups until muscular failure.

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Parasite Burden of in Whole Blood and Buffy Coat Determined by Real-Time PCR in Individuals with Chronic Chagas Disease.

Microorganisms

January 2024

Basic-Clinical Parasitology Laboratory, Cellular and Molecular Biology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago 8380453, Chile.

The objective of this study was to compare, by qPCR, the circulating blood parasite load of in the buffy coat, and in whole blood mixed with boiled and unboiled guanidine hydrochloride-EDTA buffer, of individuals with chronic ChD. The concentration and purity of DNA were evaluated in a Nanodrop Denovix DS-11FX Series Spectrophotometer (DeNovix Inc., Wilmington, NC, USA).

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Optimized protocol for high-vacuum scanning electron microscopy analysis of polyacrylamide hydrogel-attached sperm cells in a binary system.

Microsc Res Tech

May 2024

Research Institute in Energy Technologies and Advanced Materials, Faculty of Exact, Physicochemical and Natural Sciences, National University of Río Cuarto, Río Cuarto, Córdoba, Argentina.

A protocol for the analysis of a binary system comprising polyacrylamide hydrogel-attached sperm cells using high-vacuum scanning electron microscopy (SEM) is presented. This protocol focuses on optimizing the SEM procedure to obtain accurate and detailed imaging of the sperm cells and their interactions with the hydrogel scaffold. The methodology involves a stepwise sample preparation, including sample dehydration through a gradual exchange of ethanol/water ratios, followed by the application of a conductive metal coating.

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Schizophrenia-relevant social, attentional and cognitive traits in female RHA vs. RLA rats: Effects of neonatal handling.

Behav Brain Res

February 2024

Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Faculty of Medicine, Autonomous University of Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address:

The Roman high- (RHA) and low-avoidance (RLA) rats were bidirectionally selected and bred for, respectively, their rapid vs. extremely poor acquisition in the two-way active avoidance task. Consistent between-strain neurobehavioural differences have been found in anxiety- and stress-linked traits, as well as in schizophrenia-related phenotypes.

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This study aimed to determine the acute effects of high-intensity forward-backward and low-intensity side-to-side plyometric jumps performed following the warm-up on sprint (5, 10, and 15 m) and change-of-direction (COD) (T-half test and repeated T-half tests) performance in youth volleyball players. After a familiarization week, 30 male volleyball players (age = 12.04 ± 1.

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Rating of Perceived Exertion in the First Repetition is Related to the Total Repetitions Performed in Elastic Bands Training.

Motor Control

October 2023

Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia,Spain.

Several devices (e.g., linear transducers) have been used for predicting resistance training intensity.

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Rationale: The administration of NMDA receptor (NMDAR) antagonists constitutes a widely used model that produce both positive (e.g., hyperactivity) and negative (e.

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Three reasons why parental burnout is more prevalent in individualistic countries: a mediation study in 36 countries.

Soc Psychiatry Psychiatr Epidemiol

April 2024

Department of Psychology, UCLouvain, Place Cardinal Mercier 10, 1348, Louvain-la-Neuve, Belgium.

Purpose: The prevalence of parental burnout, a condition that has severe consequences for both parents and children, varies dramatically across countries and is highest in Western countries characterized by high individualism.

Method: In this study, we examined the mediators of the relationship between individualism measured at the country level and parental burnout measured at the individual level in 36 countries (16,059 parents).

Results: The results revealed three mediating mechanisms, that is, self-discrepancies between socially prescribed and actual parental selves, high agency and self-directed socialization goals, and low parental task sharing, by which individualism leads to an increased risk of burnout among parents.

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Position of digitally guided implants in completely edentulous maxillae by using a modified double-scan and overlap of three digital surface protocol.

J Prosthet Dent

May 2023

Director, Institute of Odontostomatology, Faculty of Medicine, Austral University of Chile, Valdivia, Chile; and Assistant Professor, School of Dentistry, Faculty of Medicine, Austral University of Chile, Valdivia, Chile. Electronic address:

Statement Of Problem: In patients with a completely edentulous maxilla, the variability in resilience and mucosal thickness and the lack of teeth and rigid supporting structures may lead to poor adaptation of the surgical guide and significant variation in the definitive implant position. Whether a modified double-scan technique with overlap of surfaces will improve implant placement is unclear.

Purpose: The purpose of this prospective clinical study was to evaluate the 3-dimensional position and the correlation of 6 dental implants in participants with a completely edentulous maxilla using a mucosa-supported flapless surgical guide designed with 3 matched digital surfaces obtained with a modified double-scan protocol.

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Recent studies in the general population have shown an inverse relationship between mindfulness and symptoms of anxiety and depression, as well as the benefits of physical activity on these symptoms. These relationships have not yet been studied in a population with severe mental disorder (SMD) in prison, where symptoms of anxiety and depression and impulsive behaviours have a high incidence. A controlled study was developed to assess the benefits of a mindfulness-based protocol whereby elements of Acceptance and Commitment Therapy were evaluated and compared to an adapted sport program.

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Acute Relaxation Response Induced by Tibetan Singing Bowl Sounds: A Randomized Controlled Trial.

Eur J Investig Health Psychol Educ

January 2023

Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, Institute of Neurosciences, Autonomous University of Barcelona, 08193 Barcelona, Spain.

The prevalence of anxiety has increased dramatically due to COVID-19, so effective preventive interventions are welcome. The main objective of our study was to compare the acute relaxation response (RR) induced by Tibetan singing bowl (TSB) sound-based treatment against progressive muscle relaxation (PMR) and a control waiting list group (CWL) in a single treatment session in an adult nonclinical anxious population. In this cross-sectional randomized control trial, 50 participants selected based on high state anxiety were randomly assigned to one of the experimental groups.

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Neurobehavioral Profiles of Six Genetically-based Rat Models of Schizophrenia- related Symptoms.

Curr Neuropharmacol

July 2023

Medical Psychology Unit, Department of Psychiatry and Forensic Medicine & Institute of Neurosciences, School of Medicine, Autonomous University of Barcelona, Bellaterra, Barcelona, 08193, Spain.

Schizophrenia is a chronic and severe mental disorder with high heterogeneity in its symptoms clusters. The effectiveness of drug treatments for the disorder is far from satisfactory. It is widely accepted that research with valid animal models is essential if we aim at understanding its genetic/ neurobiological mechanisms and finding more effective treatments.

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The Transcription Factors Zeb1 and Snail Induce Cell Malignancy and Cancer Stem Cell Phenotype in Prostate Cells, Increasing Androgen Synthesis Capacity and Therapy Resistance.

Adv Exp Med Biol

January 2023

Laboratory of Cellular and Molecular Oncology, Department of Basic and Clinical Oncology, Faculty of Medicine, University of Chile, Independencia 1027, 8380453, Santiago, Chile.

Prostate cancer (PCa) incidence has increased during the last decades, becoming one of the leading causes of death by cancer in men worldwide. During an extended period of prostate cancer, malignant cells are androgen-sensitive being testosterone the main responsible for tumor growth. Accordingly, treatments blocking production and action of testosterone are mostly used.

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Positive youth development (PYD) allows the youth to be comprehended from their potential, strengths and assets, in contrast to the traditional deficit view that focuses on their weaknesses. The PYD model promotes constructive behaviours in youth by highlighting the positive attributes usually found during the transition from childhood to adulthood to achieve healthy and optimal development in later life. Overall, PYD comprises five key competence (5C), the flourishing models and forty developmental assets.

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