Publications by authors named "Simard C"

The present study aimed to assess the mediating role of adjustment processes in known risk factors associated with prolonged grief disorder. Data were collected in March-April 2021 through an online survey of 542 Canadian adults bereaved since March 2020. The mediating role of satisfaction with funeral rituals, bereavement support, and coping strategies on grief outcomes was tested using structural equation modeling.

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  • ApoE mice serve as a model for studying atherosclerosis, with a focus on the effects of a Western diet and uremia.
  • Five groups of mice were analyzed based on their diet and kidney conditions, and various imaging and histological methods were utilized to assess atherosclerosis.
  • While immunostaining revealed greater inflammation in ApoE mice compared to control mice, with a Western diet showing stronger effects, F-FDG PET-MR imaging did not indicate any increased glucose uptake in the aortas of the different ApoE groups.
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Background: Advances in pediatric oncology have significantly increased survival rates, yet have introduced challenges in managing long-term treatment side effects. This study process introduces an interdisciplinary clinical intervention program rooted in the family resilience framework, aimed at improving well-being across the cancer trajectory for children and their families, especially those in Canadian communities far from specialized oncology centers with limited access to resources.

Methods: Employing an intervention mapping approach, this program collaboratively involves patients, families, professionals, and researchers.

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Children with complex and chronic conditions receiving palliative care will likely experience many transitions during their life and their treatments. Transition periods for children with life-limiting conditions and their families can be bewildering and highly anxiety-inducing. However, clinical observations seem to point to a more heterogenous care offer, including a lack or discontinuity of services, at the expense of their quality of life.

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The exchange protein directly activated by cAMP (EPAC) has been implicated in cardiac proarrhythmic signaling pathways including spontaneous diastolic Ca leak from sarcoplasmic reticulum and increased action potential duration (APD) in isolated ventricular cardiomyocytes. The action potential (AP) lengthening following acute EPAC activation is mainly due to a decrease of repolarizing steady-state K current (IK) but the mechanisms involved remain unknown. This study aimed to assess the role of EPAC1 and EPAC2 in the decrease of IK and to investigate the underlying signaling pathways.

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  • Exagamglogene autotemcel (exa-cel) is a nonviral cell therapy utilizing CRISPR-Cas9 gene editing to increase fetal hemoglobin production in patients with sickle cell disease.
  • A phase 3 study involved 44 patients aged 12 to 35 with a history of severe vaso-occlusive crises; patients received edited stem cells after myeloablative conditioning.
  • Results showed 97% of patients were free from vaso-occlusive crises and 100% avoided hospitalization for over 12 months, with a safety profile similar to standard treatments.
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  • Exagamglogene autotemcel (exa-cel) is a novel cell therapy using CRISPR-Cas9 gene editing to boost fetal hemoglobin production in patients with transfusion-dependent β-thalassemia.
  • In a phase 3 study, 52 patients aged 12 to 35 underwent treatment with exa-cel after myeloablative conditioning, and 91% achieved transfusion independence for at least 12 months.
  • The therapy showed promising results with high mean total and fetal hemoglobin levels, a favorable safety profile, and no serious adverse events like deaths or cancers reported during the follow-up period.
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Objective The aim of this text is to describe the challenges and issues associated with family caregivers during the experience of caring for a person at the end of life at home, in the context of a pandemic. This support situation, already normally demanding, turned out to be more difficult and complicated than usual due to the many challenges and issues associated, in particular, with the health restrictions imposed at the time. Here, we present an analysis of comments gathered from family caregivers during the pandemic.

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Background: Computed tomography pulmonary angiogram and lung scintigraphy with ventilation/perfusion scan are needed to diagnose pulmonary embolism (PE) in pregnancy. Their associated ionizing radiation doses are considered safe in pregnancy. A standardized patient information tool may improve patient counseling and reduce testing hesitancy.

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  • The study evaluated the performance of cardiac shear wave imaging using a new MACH 30 ultrasound machine and compared it to a validated Aixplorer system, focusing on accuracy and measurement consistency.
  • The results showed that both systems had similar accuracy for linear probes, with measurements influenced by the stiffness of the target and position in the field of view, but without significant time drift.
  • The MACH 30 system performed best at depths of 4 to 10 cm, providing reliable stiffness measurements, suggesting potential applications for future in vivo studies.
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Introduction: Direct oral anticoagulants (DOACs) are commonly used for the treatment and prevention of venous thromboembolism (VTE). However, prescription errors with DOACs can lead to patient dissatisfaction and harm. This study aimed to evaluate the impact of a standardized prescription for DOACs for VTE on prescription appropriateness.

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Patients with end-stage kidney disease (ESKD) experience a high thrombotic risk but are also at increased risk of bleeding. There is an unmet need for safer antithrombotic therapy in patients with ESKD on hemodialysis. Factor XI (FXI) represents an attractive therapeutic target for anticoagulation because of the potential to mitigate the bleeding risks associated with currently approved anticoagulants, especially in patients at high risk of bleeding.

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Background: Metabolic imaging is routinely used to demonstrate aortitis in patients with giant-cell arteritis. We aimed to investigate the preclinical model of aortitis in BALB/c IL1rn mice using [F]fluorodeoxyglucose ([F]FDG) positron emission tomography-magnetic resonance (PET-MR), gamma counting and immunostaining. We used 15 first-generation specific and opportunistic pathogen-free (SOPF) 9-week-old IL1rn mice, 15 wild-type BALB/cAnN mice and 5 s-generation specific pathogen-free (SPF) 9-week-old IL1rn.

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  • Thoracic radiation therapy can lead to accelerated atherosclerosis and aortic valve stenosis (AS), prompting this study to investigate targeted aortic valve irradiation effects in mice.
  • The study used echocardiography and MRI to assess AS and aortic inflammation, finding a significant increase in peak aortic jet velocity and remodeling in ApoE mice after irradiation.
  • The results indicate that targeted radiation can model aortic valve remodeling similar to human conditions, particularly in ApoE mice, suggesting the potential for future therapeutic interventions.
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Background: The Na1.8 voltage-gated sodium channel, expressed in peripheral nociceptive neurons, plays a role in transmitting nociceptive signals. The effect of VX-548, an oral, highly selective inhibitor of Na1.

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Durvalumab is a monoclonal antibody approved for the treatment of lung, urothelial and biliary tract cancers. Durvalumab is supplied in vials as a solution containing no preservatives. Monographs recommend single use of durvalumab vials, and that any leftovers be discarded within 24 h.

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Maintenance of normal cardiac rhythm requires coordinated activity of ion channels and transporters that allow well-ordered propagation of electrical impulses across the myocardium. Disruptions in this orderly process provoke cardiac arrhythmias that may be lethal in some patients. Risk of common acquired arrhythmias is increased markedly when structural heart disease caused by myocardial infarction (due to fibrotic scar formation) or left ventricular dysfunction is present.

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Background: Individuals hospitalized with severe ulcerative colitis represent a complex group of patients. Variation exists in the quality of care of admitted patients with inflammatory bowel disease. We hypothesized that implementation of a standardized admission order set could result in improved adherence to current best practice guidelines (Toronto Consensus Statements) for the management of this patient population.

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In Brief: Inappropriate uterine contractions are a matter of concern during pregnancy or menses. We identified the transient receptor potential melastatin 4 (TRPM4) ion channel as a new actor in mouse uterine contractions highlighting this protein as a potential pharmacological target for a better control of myometrial activity.

Abstract: Control of uterine contractions is of interest in the context of inappropriate myometrial activity during pregnancy and at time of delivery, but it is also a matter for menstrual pain.

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The role of ion channels is extensively described in the context of the electrical activity of excitable cells and in excitation-contraction coupling. They are, through this phenomenon, a key element for cardiac activity and its dysfunction. They also participate in cardiac morphological remodeling, in particular in situations of hypertrophy.

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Background: In recent years, multiple population pharmacokinetic models have been developed for drugs such as tobramycin that need therapeutic drug monitoring. Some of these models have been used to develop a priori dosing regimens for their respective populations. However, these dosing regimens may not apply to other populations.

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Phenyl 4-(2-oxo-3-alkylimidazolidin-1-yl)benzenesulfonates (PAIB-SOs) are a new family of antimitotic prodrugs bioactivated in breast cancer cells expressing CYP1A1. In this study, we report that the C-labeled prototypical PAIB-SO [C]CEU-818 and its antimitotic counterpart [C]CEU-602 are distributed in whole mouse body and they show a short half-life in mice. To circumvent this limitation, we evaluated the effect of the homologation of the alkyl side chain of the imidazolidin-2-one moiety of PAIB-SOs.

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Tobramycin is widely used to treat pulmonary exacerbations of cystic fibrosis. Height has been previously found to be significantly more predictive of tobramycin pharmacokinetics than body weight. This study aimed to develop a height-based initial dosing nomogram and evaluate its performance in peak concentration (Cmax) precision relative to standard and fixed dosing.

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Objectives: Studies show that living in overcrowded households can contribute to the erosion of social support, which is an important factor in health and well-being. In this study, we examine the relationship between household crowding and social support for Inuit living in Nunavik (hereafter referred to as Nunavimmiut), a region where housing shortages are considered a serious public health problem. We assess whether overcrowding is associated with lower levels of perceived social support and whether this association varies by gender and age group.

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