Long COVID Discourse in Canada, the United States, and Europe: Topic Modeling and Sentiment Analysis of Twitter Data.

Background: Social media serves as a vast repository of data, offering insights into public perceptions and emotions surrounding significant societal issues. Amid the COVID-19 pandemic, long COVID (formally known as post-COVID-19 condition) has emerged as a chronic health condition, profoundly impacting numerous lives and livelihoods. Given the dynamic nature of long COVID and our evolving understanding of it, effectively capturing people's sentiments and perceptions through social media becomes increasingly crucial.

Effects of dual-task interference on dexterity performance in people with mild to moderately severe Parkinson's disease: An observational analysis.

Background: Debilitating problems with hand function experienced by people with Parkinson's disease (PD) can worsen during multitasking.

Purpose: To investigate the effects of dual-task interference on a pegboard task in people with mild to moderately severe PD.

Study Design: Descriptive analysis.

Perioperative clinical practice in liver transplantation: a cross-sectional survey.

Purpose: The objective of this study was to describe some components of the perioperative practice in liver transplantation as reported by clinicians.

Methods: We conducted a cross-sectional clinical practice survey using an online instrument containing questions on selected themes related to the perioperative care of liver transplant recipients. We sent email invitations to Canadian anesthesiologists, Canadian surgeons, and French anesthesiologists specialized in liver transplantation.

Amplification of the PLAG-family genes-PLAGL1 and PLAGL2-is a key feature of the novel tumor type CNS embryonal tumor with PLAGL amplification.

Pediatric central nervous system (CNS) tumors represent the most common cause of cancer-related death in children aged 0-14 years. They differ from their adult counterparts, showing extensive clinical and molecular heterogeneity as well as a challenging histopathological spectrum that often impairs accurate diagnosis. Here, we use DNA methylation-based CNS tumor classification in combination with copy number, RNA-seq, and ChIP-seq analysis to characterize a newly identified CNS tumor type.

Coagulopathy of Dengue and COVID-19: Clinical Considerations.

Thrombocytopenia and platelet dysfunction commonly occur in both dengue and COVID-19 and are related to clinical outcomes. Coagulation and fibrinolytic pathways are activated during an acute dengue infection, and endothelial dysfunction is observed in severe dengue. On the other hand, COVID-19 is characterised by a high prevalence of thrombotic complications, where bleeding is rare and occurs only in advanced stages of critical illness; here thrombin is the central mediator that activates endothelial cells, and elicits a pro-inflammatory reaction followed by platelet aggregation.

Maternal high-fat diet modifies myelin organization, microglial interactions, and results in social memory and sensorimotor gating deficits in adolescent mouse offspring.

Prenatal exposure to maternal high-fat diet (mHFD) acts as a risk factor for various neurodevelopmental alterations in the progeny. Recent studies in mice revealed that mHFD results in both neuroinflammation and hypomyelination in the exposed offspring. Microglia, the brain-resident macrophages, play crucial roles during brain development, notably by modulating oligodendrocyte populations and performing phagocytosis of myelin sheaths.

Capillary-associated microglia regulate vascular structure and function through PANX1-P2RY12 coupling in mice.

Microglia are brain-resident immune cells with a repertoire of functions in the brain. However, the extent of their interactions with the vasculature and potential regulation of vascular physiology has been insufficiently explored. Here, we document interactions between ramified CX3CR1 myeloid cell somata and brain capillaries.

An Update on COVID-19 Vaccine Induced Thrombotic Thrombocytopenia Syndrome and Some Management Recommendations.

The thrombotic thrombocytopenia syndrome (TTS), a complication of COVID-19 vaccines, involves thrombosis (often cerebral venous sinus thrombosis) and thrombocytopenia with occasional pulmonary embolism and arterial ischemia. TTS appears to mostly affect females aged between 20 and 50 years old, with no predisposing risk factors conclusively identified so far. Cases are characterized by thrombocytopenia, higher levels of D-dimers than commonly observed in venous thromboembolic events, inexplicably low fibrinogen levels and worsening thrombosis.

Lipopolysaccharide-induced maternal immune activation modulates microglial CX3CR1 protein expression and morphological phenotype in the hippocampus and dentate gyrus, resulting in cognitive inflexibility during late adolescence.

Inflammation during pregnancy can disturb brain development and lead to disorders in the progeny, including autism spectrum disorder and schizophrenia. However, the mechanism by which a prenatal, short-lived increase of cytokines results in adverse neurodevelopmental outcomes remains largely unknown. Microglia-the brain's resident immune-cells-stand as fundamental cellular mediators, being highly sensitive and responsive to immune signals, which also play key roles during normal development.

Xenobiotic metabolism and transport in .

has emerged as a major model in biomedical and environmental toxicology. Numerous papers on toxicology and pharmacology in have been published, and this species has now been adopted by investigators in academic toxicology, pharmacology, and drug discovery labs. has also attracted the interest of governmental regulatory agencies charged with evaluating the safety of chemicals.

Incidence and prevalence of congenital anomalies in low- and middle-income countries: A systematic review.

Background: In the absence of robust data from low- and middle-income countries (LMICs), most disease burden estimates and related resource allocation choices are based on historic Northern demographics. We hypothesize that significant discrepancies exist between directly reported LMIC data and surrogate high-income country (HIC) disease burden estimates of correctible congenital anomalies.

Methods: Nine online databases were searched for studies reporting incidence and prevalence data on surgically correctible congenital anomalies in LMICs between 2006 and 2017.

Inverse Correlation between Amyloid Stiffness and Size.

We reveal that the axial stiffness of amyloid fibrils is inversely correlated with their cross-sectional area. Because amyloid fibrils' stiffness is determined by hydrogen bond (H-bond) density with a linear correlation, our finding implies that amyloid fibrils with larger radial sizes are generally softer and have lower density H-bond networks. In silico calculations show that the stiffness-size relationship of amyloid fibrils is, indeed, driven by the packing densities of residues and H-bonds.

Mechanical Anisotropy in GNNQQNY Amyloid Crystals.

Mapping the nanomechanical properties of amyloids can provide valuable insights into structure and assembly mechanisms of protein aggregates that underlie the development of various human diseases. Although it is well-known that amyloids exhibit an intrinsic stiffness comparable to that of silk (1-10 GPa), a detailed understanding of the directional dependence (anisotropy) of the stiffness of amyloids and how it relates to structural features in these protein aggregates is missing. Here we used steered molecular dynamics (SMD) simulations and amplitude modulation-frequency modulation (AM-FM) atomic force microscopy to measure the directional variation in stiffness of GNNQQNY amyloid crystals.

The rise of a novel classification system for endometrial carcinoma; integration of molecular subclasses.

Endometrial cancer is a clinically heterogeneous disease and it is becoming increasingly clear that this heterogeneity may be a function of the diversity of the underlying molecular alterations. Recent large-scale genomic studies have revealed that endometrial cancer can be divided into at least four distinct molecular subtypes, with well-described underlying genomic aberrations. These subtypes can be reliably delineated and carry significant prognostic as well as predictive information; embracing and incorporating them into clinical practice is thus attractive.

Loss of podocalyxin causes a novel syndromic type of congenital nephrotic syndrome.

Many cellular structures directly imply specific biological functions. For example, normal slit diaphragm structures that extend from podocyte foot processes ensure the filtering function of renal glomeruli. These slits are covered by a number of surface proteins, such as nephrin, podocin, podocalyxin and CD2AP.

TIA1 Mutations in Amyotrophic Lateral Sclerosis and Frontotemporal Dementia Promote Phase Separation and Alter Stress Granule Dynamics.

Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are age-related neurodegenerative disorders with shared genetic etiologies and overlapping clinical and pathological features. Here we studied a novel ALS/FTD family and identified the P362L mutation in the low-complexity domain (LCD) of T cell-restricted intracellular antigen-1 (TIA1). Subsequent genetic association analyses showed an increased burden of TIA1 LCD mutations in ALS patients compared to controls (p = 8.

Shared Canadian Curriculum in Family Medicine (SHARC-FM): Creating a national consensus on relevant and practical training for medical students.

Problem Addressed: In 2006, leaders of undergraduate family medicine education programs faced a series of increasing curriculum mandates in the context of limited time and financial resources. Additionally, it became apparent that a hidden curriculum against family medicine as a career choice was active in medical schools.

Objective Of Program: The Shared Canadian Curriculum in Family Medicine was developed by the Canadian Undergraduate Family Medicine Education Directors and supported by the College of Family Physicians of Canada as a national collaborative project to support medical student training in family medicine clerkship.

Photoacoustic signal characterization of cancer treatment response: Correlation with changes in tumor oxygenation.

Frequency analysis of the photoacoustic radiofrequency signals and oxygen saturation estimates were used to monitor the in-vivo response of a novel, thermosensitive liposome treatment. The liposome encapsulated doxorubicin (HaT-DOX) releasing it rapidly (<20 s) when the tumor was exposed to mild hyperthermia (43 °C). Photoacoustic imaging (VevoLAZR, 750/850 nm, 40 MHz) of EMT-6 breast cancer tumors was performed 30 min pre- and post-treatment and up to 7 days post-treatment (at 2/5/24 h timepoints).

The radiation biology of radioimmunotherapy.

The treatment of cancer is a wide and varied field, encompassing many methods and modalities. Radioimmunotherapy is a technique which utilizes the ablative properties of radiation by delivering radioactive particles directly to the tumour cells. This paper presents a summary of the research evidence that relates to the optimization of the effect of radioimmunotherapy.

Identification of four novel dinucleotide repeat polymorphisms in the IL-2 and IL-2beta receptor genes.

Two polymorphic regions have been described within the IL-2 and IL-2 receptor beta genes comprising 15 and 8 alleles, respectively. Whether these polymorphisms have biologic importance is unknown, although they have been variably identified in associated with certain chronic disease states. We report here the detection of four new alleles designated IL-2 A* (122 bp), IL-2R-2 (169 bp), IL-2R 0 (165 bp), and IL-2R 9 (147 bp) in patients with rheumatoid arthritis and normal controls from the Pacific Northwest.