Publications by authors named "Dufour A"

Background: Telehomecare monitoring (TM) in patients with cancer is a complex intervention. Research shows variations in the benefits and challenges TM brings to equitable access to care, the therapeutic relationship, self-management, and practice transformation. Further investigation into these variations factors will improve implementation processes and produce effective outcomes.

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Metabolic abnormalities associated with excess adiposity in obesity contribute to many noncommunicable diseases, including sarcopenic obesity. Sarcopenic obesity is the loss of muscle mass coupled with excess fat mass and fatty infiltrations in muscle tissue called myosteatosis. A diet-induced obesity model was developed to study fat infiltration in muscle tissue.

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Background: Mucopolysaccharidosis type I (MPS I - IDUA gene) is a rare autosomal recessive lysosomal storage disorder. Clinical symptoms, including visceral overload, are progressive and typically begin postnatally. Descriptions of hepatosplenomegaly associated with lysosomal pathology are uncommon during the prenatal period.

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The vibriosis of the European abalone, Haliotis tuberculata, is characterized by the rapidity of the infection by the pathogen Vibrio harveyi ORM4, leading to death of animals only after two days. The lethality of the pathogen is linked to the production of the type III secretion system (T3SS) and to genes regulated by quorum sensing (QS). The aim of this study was to investigate the colonization of the European abalone by both virulent and avirulent V.

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This study integrated and analyzed human single-cell RNA sequencing data from four publicly available datasets to enhance cellular resolution, unveiling a complex landscape of tuft cell heterogeneity within the human colon. Four tuft subtypes (TC1-TC4) emerged, as defined by unique gene expression profiles, indicating potentially novel biological functions. Tuft cell 1 (TC1) was characterized by an antimicrobial peptide signature; TC2 had an increased transcription machinery gene expression profile consistent with a progenitor-like cell; TC3 expressed genes related to ganglion (neuronal) development; and TC4 expressed genes related to tight junctions.

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Iron deficiency (ID) is common during gestation and early infancy and can alter developmental trajectories with lasting consequences on cardiovascular health. Iron plays a critical role in systemic oxygen transport (via hemoglobin) and aerobic respiration (as a component of mitochondrial complexes). Perinatal ID has been shown to cause cardiac dysfunction in neonates, but the mechanisms underlying these changes have not been characterized.

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  • Vertebral compression fractures (VFs) and spinal degeneration are prevalent causes of back pain in older adults, with this study exploring their connection through longitudinal data from the Framingham Heart Study.
  • The research found that individuals with existing VFs experienced a greater change in intervertebral disc height narrowing (DHN) over time, although the difference diminished after adjusting for various factors like age and body mass index.
  • For facet joint osteoarthritis (FJOA), there was a slight increase in the change of symptoms among participants with VFs, particularly those with severe fractures, suggesting that VFs could contribute to worsening spine osteoarthritis.
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  • Legumain is an enzyme linked to inflammation and has been found to activate a receptor that causes pain in oral cancer, but its role in the gastrointestinal tract, particularly in colon health, is less understood.
  • In studies using a specialized probe, researchers found that legumain is activated in specific colon cells during acute colitis, but inhibiting or removing legumain did not affect colon cell permeability or colitis symptoms in mouse models.
  • Advanced proteomic analyses revealed potential interactions and substrates of legumain, suggesting possible functions in the gut and its contribution to the development of colorectal cancer amidst inflammation.
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Diabetes management has evolved into a person-centered practice, where specific needs play a central role. Different types of diabetes have different dietary characteristics, depending on the patient's profile. With better access to information, patients are keen to adopt new diets.

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  • Microglia and macrophages are important for brain health and development, especially during early life.
  • Research shows that inflammation in newborn mice can alter the development of brain cells, leading to problems with thinking and learning.
  • Scientists found a specific group of microglia that react strongly to inflammation, which may explain some issues linked to neurodevelopmental disorders.
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In the lower respiratory tract, the alveolar spaces are divided from the bloodstream and the external environment by only a few microns of interstitial tissue. Alveolar macrophages (AMs) defend this delicate mucosal surface from invading infections by regularly patrolling the site. AMs have three behavior modalities to achieve this goal: extending cell protrusions to probe and sample surrounding areas, squeezing the whole cell body between alveoli, and patrolling by moving the cell body around each alveolus.

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Introduction/aims: Limitations exist in evaluating mechanical detection thresholds (MDTs) due to a lack of dependable electronic instruments designed to assess Aβ fibers and measure MDTs across different body areas. This study aims to evaluate the test-retest and inter-rater reliability of the cutaneous mechanical stimulator (CMS), an electronic tactile stimulator, in quantifying MDTs.

Methods: Using a test-retest design, participants underwent assessments of MDTs using Semmes-Weinstein monofilaments (SWM) and the CMS.

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The stromal vascular fraction (SVF) is a derivate of fat tissue comprising both adipose-derived mesenchymal stem cells and endothelial cells and serves as a promising cell source for engineering vascularized bone tissues. Its combination with osteoconductive biphasic calcium phosphate (BCP) ceramic may represent a point-of-care agent for bone reconstruction. Here we assessed the proliferation and osteogenic differentiation capacities of SVF on 3D printed BCP implants, in comparison with isolated adipose-derived mesenchymal stem cells (AD-MSCs).

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  • Identifying individuals at risk for short-term fractures is critical, as many fractures happen in those without osteoporosis, and researchers studied bone microarchitecture's role in predicting these risks.
  • In a study of over 7,000 participants, they found measures of radius and tibia bone microarchitecture were significant predictors of 2-year fracture risk, even when factoring in traditional assessments like DXA-BMD and FRAX.
  • The results indicated that decreases in certain bone measures significantly increased fracture risk in both men and women, suggesting that HR-pQCT could enhance current methods for assessing fracture risk in older adults.
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Aim: In 2021, infection control guidelines, including those specific to feeding environments, were introduced by the International Olympic and Paralympic Committees to reduce virus transmission at the Tokyo 2020 Summer and Beijing 2022 Winter games. This observational cross-sectional study aimed to investigate caterers' compliance to these guidelines which included measures for personal hygiene, sanitisation, and physical distancing at these events.

Methods: Expert sport dietitians attending Tokyo (n = 15) and Beijing (n = 7) games were surveyed to rate 11 COVID-19 countermeasures as fully (100%), partially or non-compliant at nine dining locations across both events.

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Aim: To compare the effectiveness of two methods for measuring cold detection thresholds in screening for temperature-perception deficits in elderly individuals with type 2 diabetes (T2 diabetes).

Methods: Cold threshold measurements were performed on seven body regions of participants with diabetes without neuropathy (n = 30; mean age, 70.9 ± 6.

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Collagen is the most abundant protein in mammals and a major structural component of the extracellular matrix (ECM). Changes to ECM composition occur as a result of numerous physiological and pathophysiological causes, and a common means to evaluate these changes is the collagen 3 (Col3) to collagen 1 (Col1) ratio. Current methods to measure the Col3/1 ratio suffer from a lack of specificity and often under- or over-estimate collagen composition and quantity.

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Pathogenic bacteria and their biofilms are involved in many diseases and represent a major public health problem, including the development of antibiotic resistance. These biofilms are known to cause chronic infections for which conventional antibiotic treatments are often ineffective. The search for new molecules and innovative solutions to combat these pathogens and their biofilms has therefore become an urgent need.

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Background: Androgen deprivation therapy (ADT) in prostate cancer (PCa) has been associated with development of insulin resistance. However, the predominant site of insulin resistance remains unclear.

Methods: The ADT & Metabolism Study was a single-center, 24-week, prospective observational study that enrolled ADT-naive men without diabetes who were starting ADT for at least 24 weeks (ADT group, n = 42).

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Discharge from hospitals to postacute care settings is a vulnerable time for many older adults, when they may be at increased risk for errors occurring in their care. We developed the Extension for Community Healthcare Outcomes-Care Transitions (ECHO-CT) programme in an effort to mitigate these risks through a mulitdisciplinary, educational, case-based teleconference between hospital and skilled nursing facility providers. The programme was implemented in both academic and community hospitals.

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The future of organ and tissue biofabrication strongly relies on 3D bioprinting technologies. However, maintaining sterility remains a critical issue regardless of the technology used. This challenge becomes even more pronounced when the volume of bioprinted objects approaches organ dimensions.

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Background: Activation of CD28 on multiple myeloma (MM) plasma cells, by binding to CD80 and CD86 on dendritic cells, decreases proteasome subunit expression in the tumor cells and thereby helps them evade being killed by CD8 T cells. Understanding how CD28 activation leads to proteasome subunit downregulation is needed to design new MM therapies.

Methods: This study investigates the molecular pathway downstream of CD28 activation, using an in vitro model consisting of myeloma cell lines stimulated with anti-CD28-coated beads.

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Mediterranean marine biota suffers from various anthropogenic threats. Among them, pollutants such as mercury (Hg) represent important environmental issues that are exacerbated by bioaccumulation and bioamplification along food webs via its organic form, monomethylmercury (MMHg). To date, very little is known regarding the impact of mercury on Porifera and the few available studies have been exclusively focused on Demospongiae.

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