1,153,436 results match your criteria: "Canada; National Institute for Nanotechnology[Affiliation]"

Acoustic Exaggeration Enhances Speech Discrimination in Young Autistic Children.

Autism Res

December 2024

Psychiatry and Addictology Department, CIUSSS-NIM Research Center, University of Montreal, Montreal, Quebec, Canada.

Child-directed speech (CDS), which amplifies acoustic and social features of speech during interactions with young children, promotes typical phonetic and language development. In autism, both behavioral and brain data indicate reduced sensitivity to human speech, which predicts absent, decreased, or atypical benefits of exaggerated speech signals such as CDS. This study investigates the impact of exaggerated fundamental frequency (F0) and voice-onset time on the neural processing of speech sounds in 22 Chinese-speaking autistic children aged 2-7 years old with a history of speech delays, compared with 25 typically developing (TD) peers.

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Purpose: Heterozygous pathogenic variants in SPAST are known to cause Hereditary Spastic Paraplegia 4 (SPG4), the most common form of HSP, characterized by progressive bilateral lower limbs spasticity with frequent sphincter disorders. However, there are very few descriptions in the literature of patients carrying biallelic variants in SPAST.

Methods: Targeted Sanger sequencing, panel sequencing and exome sequencing were used to identify the genetic causes in 9 patients from 6 unrelated families with symptoms of HSP or infantile neurodegenerative disorder.

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Children use nasogastric tubes (NGTs) to ensure optimum nutrition and medication delivery when oral feeding fails or when they experience faltering growth. Although this method is less invasive, children may experience complications associated with NGTs. There is a gap in the literature regarding the types and prevention of complications of NGTs in the pediatric population at home.

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Allergic rhinitis.

Allergy Asthma Clin Immunol

December 2024

Division of Allergy & Immunology, Department of Medicine, Queen's University, Kingston, ON, Canada.

Allergic rhinitis (AR) is a common disorder that is strongly linked to asthma and conjunctivitis. Classic symptoms include nasal congestion, nasal itch, rhinorrhea and sneezing. A thorough history, physical examination and assessment of allergen sensitization are important for establishing the diagnosis of AR.

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Ca signaling in vascular smooth muscle and endothelial cells in blood vessel remodeling: a review.

Inflamm Regen

December 2024

Department of Molecular and Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, 467-8603, Japan.

Vascular smooth muscle cells (VSMCs) and endothelial cells (ECs) act together to regulate blood pressure and systemic blood flow by appropriately adjusting blood vessel diameter in response to biochemical or biomechanical stimuli. Ion channels that are expressed in these cells regulate membrane potential and cytosolic Ca concentration ([Ca]) in response to such stimuli. The subsets of these ion channels involved in Ca signaling often form molecular complexes with intracellular molecules via scaffolding proteins.

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Background: INTER- and INTRAmuscular fat (IMF) is elevated in high metabolic states and can promote inflammation. While magnetic resonance imaging (MRI) excels in depicting IMF, the lack of reproducible tools prevents the ability to measure change and track intervention success.

Methods: We detail an open-source fully-automated iterative threshold-seeking algorithm (ITSA) for segmenting IMF from T1-weighted MRI of the calf and thigh within three cohorts (CaMos Hamilton (N = 54), AMBERS (N = 280), OAI (N = 105)) selecting adults 45-85 years of age.

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Background: Collaborative research with end-users is an effective way to generate meaningful research applications and support greater impact on practice and knowledge exchange. To address these needs, a Citizen Advisory Group (CAG) of nine older adults (ages 64-80, 67% women) was formed to advise scientists on the development of Brain Health PRO (BHPro), a web-based platform designed to increase dementia prevention literacy and awareness. The current study evaluated if the CAG met its objectives, how inclusion of the CAG aligned with collaborative research approaches, and the CAG's experience and satisfaction throughout the development process.

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Eating disorders (EDs) are a group of debilitating mental illnesses characterized by maladaptive eating behaviors and severe cognitive-emotional dysfunction, directly affecting 1-3% of the population. Standard treatments are not effective in approximately one third of ED cases, representing the need for scientific advancement. There is emerging evidence for the safety and efficacy of psilocybin-assisted psychotherapy (PAP) to improve treatment outcomes in individuals with EDs.

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Background: Understanding site-related factors that influence enrolment within multicenter randomized controlled trials (RCT) may help reduce trial delays and cost over-runs and prevent early trial discontinuation. In this analysis of PROSPECT (Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial), we describe patient enrolment patterns and examine factors influencing site-based monthly enrolment.

Design: Retrospective analysis of a multicenter RCT.

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Background: Competency-Based Medical Education (CBME) aims to align educational outcomes with the demands of modern healthcare. Entrustable Professional Activities (EPAs) serve as key tools for feedback and professional development within CBME. With the growing body of literature on EPAs, there is a need to synthesize existing research on stakeholders' experiences and perceptions to enhance understanding of the implementation and impact of EPAs.

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Background: Immune ageing complicates cancer treatment in older individuals. While immunotherapy targeting the PD-1/PD-L1 pathway can reinvigorate T cells, these cells tend to become senescent with age. This study investigates different CD8 T cell subsets usually associated with senescence, in cancer patients over 70 years old who are undergoing anti-PD-1/PD-L1 immunotherapy, and examines the relationship between these senescent cells and prior chemotherapy exposure.

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Assessing the impact of the iPeer2Peer program for adolescents with juvenile idiopathic arthritis: a mixed-methods randomized controlled trial.

Pediatr Rheumatol Online J

December 2024

Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, 686 Bay Street, Room 06.9715, Toronto, ON, M5G 0A4, Canada.

Background: Juvenile Idiopathic Arthritis (JIA) is a chronic pediatric illness, whereby youth experience physical, emotional and psychosocial challenges that result in reduced health related quality of life (HRQL). Peer mentoring has been shown to improve disease self-management in adults with chronic conditions, with mixed results in younger populations. Building on our pilot work - which supported the feasibility and initial effectiveness of the iPeer2Peer program - the objective of this study was to assess the clinical effectiveness of the program in youth with JIA through a waitlist randomized controlled trial.

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Background: Pompe disease is a glycogen storage disease primarily affecting striated muscles. Despite its main manifestation in muscles, patients with Pompe disease may exhibit non-muscle symptoms, such as hearing loss, suggesting potential involvement of sensory organs or the nervous system due to glycogen accumulation.

Aims: This study aimed to evaluate the presence of concomitant small and large fiber neuropathy in patients with Pompe disease.

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Vertebrates differ over 100,000-fold in responses to pro-inflammatory agonists such as bacterial lipopolysaccharide (LPS), complicating use of animal models to study human sepsis or inflammatory disorders. We compared transcriptomes of resting and LPS-exposed blood from six LPS-sensitive species (rabbit, pig, sheep, cow, chimpanzee, human) and four LPS-resilient species (mice, rats, baboon, rhesus), as well as plasma proteomes and lipidomes. Unexpectedly, at baseline, sensitive species already had enhanced expression of LPS-responsive genes relative to resilient species.

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Purpose: Bisphosphonates (BPs) are first line agents commonly used in the management of osteoporosis. There have been two case reports that have suggested a possible link between BPs and acute angle closure (AAC). In the absence of any large epidemiologic studies, we sought to determine the risk of AAC and OAG with bisphosphonate use in patients with osteoporosis.

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Enrolment characteristics in age-related macular degeneration clinical trials: a cross-sectional study.

Eye (Lond)

December 2024

Department of Ophthalmology and Vision Science, University of Toronto, Suite 400, 340 College Street, Toronto, ON, M5T 3A9, Canada.

Background/objectives: To investigate demographic enrolment characteristics in age-related macular degeneration (AMD) trials.

Subjects/methods: Clinicaltrials.gov was searched with "age-related macular degeneration" to identify RCTs with double, triple, or quadruple masking.

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Background: We sought to define whether and how hepatic ischemia/reperfusion (I/R) as manifested by perioperative aspartate aminotransferase (AST) and alanine aminotransaminase (ALT) levels impact long-term outcomes after curative-intent resection of hepatocellular carcinoma (HCC).

Patients And Methods: Intrasplenic injection of HCC cells was used to establish a murine model of HCC recurrence with versus without I/R injury. Patients who underwent curative resection for HCC were identified from a multi-institutional derivative cohort (DC) and separate external validation (VC) cohort.

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Phenomenological Mapping: A Method For Understanding Pre-Reflective Consciousness.

Integr Psychol Behav Sci

December 2024

Universidad del Desarrollo, Santiago de Chile, Chile.

Exploring the nuanced and often elusive realm of pre-reflective consciousness presents a methodological challenge, as it involves capturing experiences that arise prior to reflective thought and language. This article introduces Phenomenological Mapping, an innovative research method designed to systematically study the pre-reflective dimensions of human experience. Grounded in the foundational theories of Edmund Husserl (2012), Maurice Merleau-Ponty (2013), and Martin Heidegger (1992, 2008), the approach also integrates contemporary perspectives from Dan Zahavi (1999, Contemporary Phenomenology and Qualitative Research 5(1), 1-17, 2021), Shaun Gallagher (2006, 2017), and Evan Thompson (2010, 2017).

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Development of a molecular assay for the determination of Eimeria tenella oocyst viability.

Parasitol Res

December 2024

Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.

Coccidiosis is caused by apicomplexan parasites of the genus Eimeria, which infect epithelial cells of the intestinal tract causing diarrhea and negatively impacting production in the poultry industry. The self-limiting and highly immunogenic nature of infection by Eimeria spp. make live vaccination an effective means of coccidiosis control.

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Psychiatric disorders are highly comorbid, heritable, and genetically correlated [1-4]. The primary objective of cross-disorder psychiatric genetics research is to identify and characterize both the shared genetic factors that contribute to convergent disease etiologies and the unique genetic factors that distinguish between disorders [4, 5]. This information can illuminate the biological mechanisms underlying comorbid presentations of psychopathology, improve nosology and prediction of illness risk and trajectories, and aid the development of more effective and targeted interventions.

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Ecological and anthropogenic effects on the genomic diversity of lemurs in Madagascar.

Nat Ecol Evol

December 2024

IBE, Institute of Evolutionary Biology (UPF-CSIC), Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona, Spain.

Ecological variation and anthropogenic landscape modification have had key roles in the diversification and extinction of mammals in Madagascar. Lemurs represent a radiation with more than 100 species, constituting roughly one-fifth of the primate order. Almost all species of lemurs are threatened with extinction, but little is known about their genetic diversity and demographic history.

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The interplay between motor cost and self-efficacy related to walking across terrain in gaze and walking decisions.

Sci Rep

December 2024

Biomedical Physiology and Kinesiology, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.

Motor behaviours, like where to step and which path to walk, rely on gaze shifts to gather visual information necessary to decide the next action. Factors influencing both gaze and walking decisions are poorly understood. Here we had people choose between two paths to determine how a person's belief in their ability to walk across different terrains (i.

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Hoxa5 plays numerous roles in development, but its downstream molecular effects are mostly unknown. We applied bulk RNA-seq assays to characterize the transcriptional impact of the loss of Hoxa5 gene function in seven different biological contexts, including developing respiratory and musculoskeletal tissues that present phenotypes in Hoxa5 mouse mutants. This global analysis revealed few common transcriptional changes, suggesting that HOXA5 acts mainly via the regulation of context-specific effectors.

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Continued efforts to discover new antibacterial molecules are critical to achieve a robust pre-clinical pipeline for new antibiotics. Screening of compound or natural product extract libraries remains a widespread approach and can benefit from the development of whole cell assays that are robust, simple and versatile, and allow for high throughput testing of antibacterial activity. In this study, we created and validated two bioluminescent reporter strains for high-throughput screening, one in Pseudomonas aeruginosa, and another in a hyperporinated and efflux-deficient Escherichia coli.

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