286 results match your criteria: "Montreal Clinical Research Institute[Affiliation]"

The Biology and Clinical Implications of PCSK7.

Endocr Rev

December 2024

Laboratory of Biochemical Neuroendocrinology, Montreal Clinical Research Institute (IRCM, affiliated to the University of Montreal), 110 Pine Ave West, Montreal, QC, H2W 1R7, Canada.

Discovered in 1996, PCSK7 is the seventh of the nine-membered proprotein convertase subtilisin-kexin (PCSK) family. This article reviews the various aspects of the multifaceted biology of PCSK7 and what makes it an exciting new target for metabolic dysfunction-associated steatotic liver disease (MASLD) affecting ∼30% of the population globally, dyslipidemia, cardiovascular disease (CVD), and likely cancer/metastasis. We will systematically review and discuss all the available epidemiological data, structural, cell biology, and in vivo evidence that eventually led to the discovery of PCSK7 as a novel post-translational regulator of apolipoprotein B.

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Regular physical activity and exercise (PA) are cornerstones of diabetes care for individuals with type 1 diabetes. In recent years, the availability of automated insulin delivery (AID) systems has improved the ability of people with type 1 diabetes to achieve the recommended glucose target ranges. PA provides additional health benefits but can cause glucose fluctuations, which challenges current AID systems.

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Regular physical activity and exercise (PA) are cornerstones of diabetes care for individuals with type 1 diabetes. In recent years, the availability of automated insulin delivery (AID) systems has improved the ability of people with type 1 diabetes to achieve the recommended glucose target ranges. PA provide additional health benefits but can cause glucose fluctuations, which challenges current AID systems.

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Extreme LDL-C concentration is associated with increased cardiovascular disease in women with homozygous familial hypercholesterolemia.

J Clin Lipidol

November 2024

Lipids, Nutrition, and Cardiovascular Prevention Clinic of the Montreal Clinical Research Institute, Montreal, Québec, Canada; Department of Medicine, Divisions of Experimental Medicine and Medical Biochemistry, McGill University, Montreal, Québec H3G 2M1, Canada. Electronic address:

Background: Homozygous familial hypercholesterolemia (HoFH) is a rare genetic disease of low-density lipoprotein cholesterol (LDL-C) metabolism. Despite the devastating effect of this disease on atherosclerotic cardiovascular health, the disease phenotype and severity are more heterogeneous than previously thought. The predictors of atherosclerotic cardiovascular disease (ASCVD) in HoFH patients have never been systematically studied.

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Article Synopsis
  • Glioblastoma multiforme (GBM) is a highly aggressive brain tumor that is currently incurable, highlighting the need for new treatment options.
  • This study explored the effects of fingolimod, a drug known for its anti-cancer properties, on C6 rat brain cancer cells using various tests to assess cell survival, proliferation, and apoptosis.
  • Results showed that fingolimod significantly reduced cell survival and tumor growth in rats, indicating that it may work by inducing cell cycle arrest and apoptosis in GBM cells.
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PCSK9 in metabolism and diseases.

Metabolism

November 2024

Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China; National Clinical Research Center for Interventional Medicine, Shanghai 200032, China. Electronic address:

PCSK9 is a serine protease that regulates plasma levels of low-density lipoprotein (LDL) and cholesterol by mediating the endolysosomal degradation of LDL receptor (LDLR) in the liver. When PCSK9 functions unchecked, it leads to increased degradation of LDLR, resulting in elevated circulatory levels of LDL and cholesterol. This dysregulation contributes to lipid and cholesterol metabolism abnormalities, foam cell formation, and the development of various diseases, including cardiovascular disease (CVD), viral infections, cancer, and sepsis.

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This systematic review and meta-analysis examine the literature (up to August 2nd 2024) on the influence of exercise timing on energy intake in both children and adults. A comprehensive search was conducted using MEDLINE, EMBASE, Cochrane Library, SPORTDiscus, and Web of Science Core Collection, following PRISMA guidelines. The review was registered in Prospero (CRD42024553381) and evaluated using QUADAS-2.

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  • Recent research highlights the varied risk levels of acute pancreatitis in patients with severe hypertriglyceridemia (HTG) due to genetic factors, beyond just triglyceride levels.* -
  • Studies show that polygenic susceptibility significantly affects the likelihood of acute pancreatitis, with a new risk score indicating that high susceptibility patients have triple the risk.* -
  • Continued focus on developing risk assessment tools and predictive models is crucial for identifying individuals who may benefit from proactive treatments to reduce pancreatitis risk, such as APOC3 inhibitors.*
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  • The hGID complex functions as an important E3 ligase influencing various cellular processes, such as the cell cycle and metabolism, but its full range of biological roles is not well understood.
  • Researchers utilized the BioID2 technique to discover proteins that interact with the hGID complex, identifying ARHGAP11A as a substrate that is ubiquitinated by GID4, leading to its degradation.
  • Inhibiting GID4 or depleting it raises ARHGAP11A levels, impacting cell motility and migration, as ARHGAP11A affects RhoA activity at the cell's edge.
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  • Acute pancreatitis (AP) is often triggered by gallstones, alcohol, or high triglycerides, and this study explores the genetic factors that could help identify individuals at higher risk for AP.
  • Researchers analyzed genetic data from nearly 485,000 individuals to create a weighted polygenic risk score (PRS) using specific genetic variants linked to pancreatitis.
  • Those with a higher pancreatitis PRS (above the 90th percentile) had a significantly increased risk of developing AP, suggesting that this genetic information can aid in identifying patients who might need closer monitoring and intervention.
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  • Human pluripotent stem cells (hPSCs) can potentially become insulin-producing β cells, which are important for diabetes treatment, but current differentiation methods are not very effective.
  • Researchers found that using selective tankyrase inhibitors like WIKI4 improves the differentiation of hPSCs into pancreatic progenitors, leading to better development of islet-like cells.
  • These advancements enhance our understanding of pancreatic cell development and offer a new approach for creating pancreatic cells for research and potential diabetes therapies.
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The axon guidance cue netrin-1 signals through its receptor DCC (deleted in colorectal cancer) to attract commissural axons to the midline. Variants in DCC are frequently associated with congenital mirror movements (CMMs). A CMM-associated variant in the cytoplasmic tail of DCC is located in a conserved motif predicted to bind to a regulator of actin dynamics called the WAVE (Wiskott-Aldrich syndrome protein-family verprolin homologous protein) regulatory complex (WRC).

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  • * A study examined 131 female patients with X-linked dominant incontinentia pigmenti (IP), finding that 36% produced autoantibodies against IFN-α and/or IFN-ω, significantly higher than age-matched controls.
  • * The presence of these autoantibodies is linked to an abnormally small thymus and predisposes patients to life-threatening viral infections, while those without these autoantibodies do not face the same risk.
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Importance: Deep brain stimulation (DBS) results in improvements in motor function and quality of life in patients with Parkinson disease (PD), which might impact a patient's perception of valued personal characteristics. Prior studies investigating whether DBS causes unwanted changes to oneself or one's personality have methodological limitations that should be addressed.

Objective: To determine whether DBS is associated with changes in characteristics that patients with PD identify as personally meaningful.

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Objectives: In the province of Quebec, Canada, interdisciplinary support groups (ISGs) are mandated to support those who are involved in the clinical, administrative, legal and ethical aspects of medical assistance in dying (MAiD). This article presents the results of a mixed-method, multi-phase study carried out in 2021 on ISGs with the aim to describe current ISG practices, critically analyze them and make recommendations on promising practices for provincial implementation.

Method: Semi-structured interviews (42) and focus groups (7) with coordinators of 24 ISGs were used to identify promising practices and confirm their utility with participants.

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Cystic Fibrosis Related Diabetes: a first Canadian Clinical Practice guideline.

Can J Diabetes

September 2024

Montreal Clinical Research Institute, Montréal, QC, Canada; Nutrition Department, Faculty of Medicine, University of Montreal, Montréal, QC, Canada; Cystic Fibrosis Clinic, Centre Hospitalier de l'Université de Montréal, Université de Montréal, Montréal, Québec, Canada; Division of Experimental Medicine, Faculty of Medicine, McGill University, Montréal, Québec, Canada; Division of Endocrinology, Faculty of Medicine, Department of Medicine, Université de Montréal, Montréal, Québec, Canada. Electronic address:

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Article Synopsis
  • Dysbetalipoproteinemia (DBL) is linked to high cholesterol and significantly increases the risk of atherosclerotic cardiovascular disease (ASCVD).
  • The study examined predictors of ASCVD in 2,699 individuals with the ε2/ε2 genotype, finding that factors like age, hypertension, waist circumference, and a polygenic risk score are key indicators of risk.
  • Results suggest that ε2/ε2 individuals with DBL have lower survival rates free from ASCVD, emphasizing the need for improved risk assessment and management strategies for these patients.
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Plozasiran for Managing Persistent Chylomicronemia and Pancreatitis Risk.

N Engl J Med

September 2024

From the School of Medicine, University of Western Australia, and the Department of Cardiology, Royal Perth Hospital - both in Perth, Australia (G.F.W.); the Metabolism and Lipids Program, Mount Sinai Fuster Heart Hospital, Icahn School of Medicine at Mount Sinai (R.S.R.), and New York University (NYU) Grossman School of Medicine, NYU Langone Health (I.J.G) - both in New York; Robarts Research Institute, London, ON (R.A.H.), and the Department of Medicine, McGill University, and the Genetic Dyslipidemia Clinic, Montreal Clinical Research Institute (A.B.) and Université de Montréal and ECOGENE-21 (D.G.), Montreal - all in Canada; Sorbonne University, INSERM UMR1166, Lipidology and Cardiovascular Prevention Unit, Department of Nutrition, Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris (A.G.); the Department of Endocrinology, University Hospitals Leuven-KU Leuven, Leuven, Belgium (A.M.); and Arrowhead Pharmaceuticals, Pasadena (R.Z., M.M., J.H.), and Stanford University, Palo Alto (N.J.L.) - both in California.

Background: Persistent chylomicronemia is a genetic recessive disorder that is classically caused by familial chylomicronemia syndrome (FCS), but it also has multifactorial causes. The disorder is associated with the risk of recurrent acute pancreatitis. Plozasiran is a small interfering RNA that reduces hepatic production of apolipoprotein C-III and circulating triglycerides.

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Aims: The prevalence and associations of overweight and obesity in Canadian adult people living with type 1 diabetes (PWT1D) are poorly documented. In a cohort of PWT1D patients, this study assesses (i) overweight and obesity frequencies and associated PWT1D clinicodemographic characteristics, (ii) diabetes characteristics, and (iii) the use of noninsulin adjunctive agents.

Materials And Methods: Cross-sectional analysis of self-reported data from the BETTER registry: 1091 adult PWT1D (aged 44.

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Aim: The relative contributions of insulin secretory defects and possible additional contribution of insulin resistance for the development of cystic fibrosis (CF)-related diabetes (CFRD) are poorly understood. We aimed to (a) determine which indices of insulin resistance predict progression to CFRD, and (b) to model the relative contributions of insulin secretory function and insulin resistance to predict the risk of CFRD.

Materials And Methods: Three hundred and three individuals living with CF underwent a 2-h oral glucose tolerance test with blood sampling every 30 min at 12-24-month intervals until they developed CFRD or until the end of follow-up (up to 15 years).

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Perry syndrome (PS) is a rare autosomal dominant disease characterized by parkinsonism, central hypoventilation, weight loss and depression and is caused by pathogenic mutations in the dynactin subunit 1 () gene (encoding p150 protein). To date, only two cases have been reported in Latin America, specifically in Colombia and Argentina. The present study, to the best of our knowledge, reports the first recorded Mexican family with PS.

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