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  1. Article ; Online: A 37-Year-Old Man With Right Lung Consolidation.

    Quigley, Nicholas / Couture, Christian / Gervais, Philippe / Maltais, François

    Chest

    2023  Volume 163, Issue 3, Page(s) e111–e114

    Abstract: Case presentation: A 37-year-old man attended a medical clinic at the confluence of the Appalachian and the St. Lawrence Valley after 2 weeks of coughing greenish sputum and progressive dyspnea on exertion. In addition, he reported fatigue, fevers, and ... ...

    Abstract Case presentation: A 37-year-old man attended a medical clinic at the confluence of the Appalachian and the St. Lawrence Valley after 2 weeks of coughing greenish sputum and progressive dyspnea on exertion. In addition, he reported fatigue, fevers, and chills. He had quit smoking a year earlier and was not a drug user. He recently had spent most of his free time outdoors, mountain biking, but had not travelled outside of Canada. Medical history was unremarkable. He did not take any medication. Upper airway samples taken for SARS-CoV-2 proved negative; he was prescribed cefprozil and doxycycline for presumed community-acquired pneumonia. He returned to the emergency room 1 week later with mild hypoxemia, persisting fever, and a chest radiography consistent with lobar pneumonia. The patient was admitted to his local community hospital, and broad-spectrum antibiotics were added to the regimen. Unfortunately, his condition deteriorated over the following week, and he experienced hypoxic respiratory failure for which he required mechanical ventilation before his transfer to our medical center.
    MeSH term(s) Male ; Humans ; Adult ; COVID-19 ; SARS-CoV-2 ; Lung/diagnostic imaging ; Dyspnea ; Anti-Bacterial Agents/therapeutic use ; Fever
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2023-03-07
    Publishing country United States
    Document type Case Reports
    ZDB-ID 1032552-9
    ISSN 1931-3543 ; 0012-3692
    ISSN (online) 1931-3543
    ISSN 0012-3692
    DOI 10.1016/j.chest.2022.10.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: An unusual isolated anterior mediastinal lesion.

    Quigley, Nicholas / Lang-Lazdunski, Loic / Boily-Daoust, Catherine / Couture, Christian / Fortin, Marc

    Respirology case reports

    2022  Volume 10, Issue 11, Page(s) e01059

    Abstract: Malignant pleural mesothelioma (MPM) is an infrequent tumour of poor prognosis with a strong association with asbestos exposure. Pleural effusion or thickening is the most common radiological finding. Thoracoscopic biopsy is the diagnostic modality of ... ...

    Abstract Malignant pleural mesothelioma (MPM) is an infrequent tumour of poor prognosis with a strong association with asbestos exposure. Pleural effusion or thickening is the most common radiological finding. Thoracoscopic biopsy is the diagnostic modality of choice. In our report, we present the case of a career welder who consulted with vocal cord palsy and an atypical anterior mediastinal lesion. An EBUS-TBNA-guided biopsy and a thorough cytological assessment led to an unexpected diagnosis of epithelioid MPM. A localized anterior mediastinal lesion is an extremely infrequent presentation of MPM that deserves clinical recognition.
    Language English
    Publishing date 2022-10-19
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2750180-2
    ISSN 2051-3380
    ISSN 2051-3380
    DOI 10.1002/rcr2.1059
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  3. Article ; Online: Effects of sodium intake and cardiorespiratory fitness on body composition and genetic susceptibility to obesity: results from the Quebec Family Study.

    Tremblay, Angelo / Pérusse, Louis / Bertrand, Catherine / Jacob, Raphaëlle / Couture, Christian / Drapeau, Vicky

    The British journal of nutrition

    2022  Volume 129, Issue 1, Page(s) 77–86

    Abstract: The main aim of this study was to evaluate the effects of Na intake and cardiorespiratory fitness (CRF) on body composition. The study was also intended to assess whether Na intake and/or CRF mediate the genetic susceptibility to obesity. Analyses were ... ...

    Abstract The main aim of this study was to evaluate the effects of Na intake and cardiorespiratory fitness (CRF) on body composition. The study was also intended to assess whether Na intake and/or CRF mediate the genetic susceptibility to obesity. Analyses were performed on a sample of 526 adult participants from the Quebec Family Study for whom a complete data set was available for nutrient and energy intake, CRF and body composition variables. The effects of Na, CRF and their interaction were analysed by comparing sex-specific tertiles using general linear mixed models. In both males and females, we observed a significant effect of Na intake and CRF on all body composition variables. However, in females only, we found that the effect of Na intake on body composition variables varies according to CRF level such that high Na intake was associated with increased body fatness, but only in females with low CRF. This interaction effect remained significant after statistical adjustment for total sugar, fat and energy intake. Using mediation analysis, we also found Na intake and CRF to be significant mediators of the relationship between a polygenic risk score of obesity based on > 500 000 genetic variants and BMI or waist circumference. In conclusion, the current study shows that Na intake influences body composition via mechanisms that interact with aerobic fitness, especially in females. Furthermore, both Na intake and CRF seem to be involved in the expression of the genetic susceptibility to obesity.
    MeSH term(s) Male ; Adult ; Female ; Humans ; Cardiorespiratory Fitness ; Genetic Predisposition to Disease ; Quebec ; Body Mass Index ; Obesity/genetics ; Body Composition ; Sodium, Dietary ; Physical Fitness
    Chemical Substances Sodium, Dietary
    Language English
    Publishing date 2022-03-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 280396-3
    ISSN 1475-2662 ; 0007-1145
    ISSN (online) 1475-2662
    ISSN 0007-1145
    DOI 10.1017/S0007114522000666
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  4. Article ; Online: Prevalence of Helicobacter pylori Infection in Bariatric Surgery Patients.

    Baillargeon, David / Greenblatt, Matthew / Côté, Marianne / Nadeau, Mélanie / Couture, Christian-Yves / Hould, Frédéric-Simon / Bouvet-Bouchard, Léonie / Tchernof, André / Biertho, Laurent

    Obesity surgery

    2023  Volume 33, Issue 7, Page(s) 2132–2138

    Abstract: Objective: To determine the rate of histology-proven Helicobacter pylori (HP) infection in patients undergoing bariatric surgery and to identify risk factors for HP infection.: Methods: In a retrospective analysis, patients who underwent bariatric ... ...

    Abstract Objective: To determine the rate of histology-proven Helicobacter pylori (HP) infection in patients undergoing bariatric surgery and to identify risk factors for HP infection.
    Methods: In a retrospective analysis, patients who underwent bariatric surgery with gastric resection in a single hospital between January 2004 and January 2019 were analyzed. For each patient, a surgical specimen was submitted for anatomopathological examination and analyzed for gastritis or other anomalies. When gastritis was present, HP infection was confirmed by the identification of curvilinear bacilli in conventional histology or by specific immunohistochemical detection of HP antigen.
    Results: A total of 6388 specimens were available for review (4365 women, 2023 men) with a mean age of 44.9 ± 11.2 years and a mean body mass index (BMI) of 49.3 ± 8.2 kg/m
    Conclusions: The rate of histology-proven HP infection is low in patients with severe obesity who present for bariatric surgery and is associated with age.
    MeSH term(s) Male ; Humans ; Female ; Adult ; Middle Aged ; Helicobacter Infections/complications ; Helicobacter pylori ; Obesity, Morbid/surgery ; Retrospective Studies ; Prevalence ; Bariatric Surgery/adverse effects ; Gastritis/complications
    Language English
    Publishing date 2023-05-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1070827-3
    ISSN 1708-0428 ; 0960-8923
    ISSN (online) 1708-0428
    ISSN 0960-8923
    DOI 10.1007/s11695-023-06638-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Angiotensin II receptor blockers are associated with reduced valvular fibrosis in females with aortic stenosis.

    Carter-Storch, Rasmus / Le Nezet, Emma / Ali, Mulham / Powers, Andréanne / Haujir, Amal / Demers, Karolanne / Couture, Christian / Dumont, Éric / Trahan, Sylvain / Pagé, Sylvain / Dagenais, François / Pibarot, Philippe / Dahl, Jordi S / Clavel, Marie-Annick

    The Canadian journal of cardiology

    2024  

    Abstract: Background: Angiotensin receptor blockers (ARBs) may slow down the progression of aortic stenosis (AS), through their antifibrotic effect. Females present more valvular fibrosis than males, thus ARBs may have more effect in females. Our aim was to ... ...

    Abstract Background: Angiotensin receptor blockers (ARBs) may slow down the progression of aortic stenosis (AS), through their antifibrotic effect. Females present more valvular fibrosis than males, thus ARBs may have more effect in females. Our aim was to assess the impact of ARBs on the remodeling of the aortic valve in males and females.
    Methods: We included patients who had an aortic valve replacement± coronary bypass grafting between 2006-2013. Patients with missing echocardiographic or histologic data were excluded. Warren-Yong and fibrosis scores of the explanted valves were performed. Patients were divided into four phenotypes according to their Warren-Yong and fibrosis scores: Mild calcification/fibrosis group, Severe calcification/fibrosis group, Predominant fibrosis group, Predominant calcification group.
    Results: Among the 1,321 included patients, the vast majority (89%) has severe AS. Patients in the predominant fibrosis group, as compared to the predominant calcium group, were more often females (39 vs 31%, p=0.008), bicuspid valves (44 vs 34%, p=0.002) and they less often used ARBs (25 vs 30%, p=0.046). Female sex was independently associated with being in the predominant fibrosis group (OR 1.45 [95% CI 1.08-1.95], p=0.01), with a significant interaction between female sex and ARBs. Females taking ARBs compared to females not taking ARBs had significantly lower fibrosis score (p<0.001). This difference was not seen in males.
    Conclusion: In this large series of patients with moderate-severe AS, among females there was a negative association between intake of ARBs and valvular fibrosis. Thus, the possible effects of ARBs may be sex-specific, with a larger therapeutic role in females.
    Language English
    Publishing date 2024-03-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 632813-1
    ISSN 1916-7075 ; 0828-282X
    ISSN (online) 1916-7075
    ISSN 0828-282X
    DOI 10.1016/j.cjca.2024.03.009
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  6. Article ; Online: Performance of an RNA-Based Next-Generation Sequencing Assay for Combined Detection of Clinically Actionable Fusions and Hotspot Mutations in NSCLC.

    Desmeules, Patrice / Boudreau, Dominique K / Bastien, Nathalie / Boulanger, Marie-Chloé / Bossé, Yohan / Joubert, Philippe / Couture, Christian

    JTO clinical and research reports

    2022  Volume 3, Issue 2, Page(s) 100276

    Abstract: Introduction: With its expanding list of approved and emerging therapeutic indications, NSCLC is the exemplar tumor type requiring upfront assessment of several biomarkers to guide clinical management. Next-generation sequencing allows identification of ...

    Abstract Introduction: With its expanding list of approved and emerging therapeutic indications, NSCLC is the exemplar tumor type requiring upfront assessment of several biomarkers to guide clinical management. Next-generation sequencing allows identification of different types of molecular alterations, each with specific analytical challenges. Library preparation using parallel DNA and RNA workflows can overcome most of them, but it increases complexity of laboratory operations, turnaround time, and costs. We describe the performance characteristics of a 15-gene RNA panel on the basis of anchored multiplex polymerase chain reaction for combined detection of clinically relevant oncogenic fusion transcripts and hotspot small variants.
    Methods: Formalin-fixed, paraffin-embedded NSCLC clinical samples (N = 58) were used along cell lines and commercial controls to validate the assay's analytical performance, followed by an exploratory prospective cohort (N = 87).
    Results: The raw assay sensitivity for hotspot mutations and fusions was 83% and 93%, respectively, reaching 100% after filtering for key assay metrics. Those include quantity and quality of input of nucleic acid and sequencing metric from primers on housekeeping genes included in the assay. In the prospective cohort, driver alterations were identified in most cases (≥58%).
    Conclusions: This ultrafocused RNA-next-generation sequencing assay offers an advantageous option with single unified workflow for simultaneous detection of clinically relevant hotspot mutations and fusions in NSCLC, focusing on actionable gene targets.
    Language English
    Publishing date 2022-01-10
    Publishing country United States
    Document type Journal Article
    ISSN 2666-3643
    ISSN (online) 2666-3643
    DOI 10.1016/j.jtocrr.2022.100276
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  7. Article ; Online: Genetic inhibition of angiopoietin-like protein-3, lipids, and cardiometabolic risk.

    Gobeil, Émilie / Bourgault, Jérôme / Mitchell, Patricia L / Houessou, Ursula / Gagnon, Eloi / Girard, Arnaud / Paulin, Audrey / Manikpurage, Hasanga D / Côté, Valérie / Couture, Christian / Marceau, Simon / Bossé, Yohan / Thériault, Sébastien / Mathieu, Patrick / Vohl, Marie-Claude / Tchernof, André / Arsenault, Benoit J

    European heart journal

    2024  Volume 45, Issue 9, Page(s) 707–721

    Abstract: Background and aims: RNA-based, antibody-based, and genome editing-based therapies are currently under investigation to determine if the inhibition of angiopoietin-like protein-3 (ANGPTL3) could reduce lipoprotein-lipid levels and atherosclerotic ... ...

    Abstract Background and aims: RNA-based, antibody-based, and genome editing-based therapies are currently under investigation to determine if the inhibition of angiopoietin-like protein-3 (ANGPTL3) could reduce lipoprotein-lipid levels and atherosclerotic cardiovascular disease (ASCVD) risk. Mendelian randomisation (MR) was used to determine whether genetic variations influencing ANGPTL3 liver gene expression, blood levels, and protein structure could causally influence triglyceride and apolipoprotein B (apoB) levels as well as coronary artery disease (CAD), ischaemic stroke (IS), and other cardiometabolic diseases.
    Methods: RNA sequencing of 246 explanted liver samples and genome-wide genotyping was performed to identify single-nucleotide polymorphisms (SNPs) associated with liver expression of ANGPTL3. Genome-wide summary statistics of plasma protein levels of ANGPTL3 from the deCODE study (n = 35 359) were used. A total of 647 carriers of ANGPTL3 protein-truncating variants (PTVs) associated with lower plasma triglyceride levels were identified in the UK Biobank. Two-sample MR using SNPs that influence ANGPTL3 liver expression or ANGPTL3 plasma protein levels as exposure and cardiometabolic diseases as outcomes was performed (CAD, IS, heart failure, non-alcoholic fatty liver disease, acute pancreatitis, and type 2 diabetes). The impact of rare PTVs influencing plasma triglyceride levels on apoB levels and CAD was also investigated in the UK Biobank.
    Results: In two-sample MR studies, common genetic variants influencing ANGPTL3 hepatic or blood expression levels of ANGPTL3 had a very strong effect on plasma triglyceride levels, a more modest effect on low-density lipoprotein cholesterol, a weaker effect on apoB levels, and no effect on CAD or other cardiometabolic diseases. In the UK Biobank, the carriers of rare ANGPTL3 PTVs providing lifelong reductions in median plasma triglyceride levels [-0.37 (interquartile range 0.41) mmol/L] had slightly lower apoB levels (-0.06 ± 0.32 g/L) and similar CAD event rates compared with non-carriers (10.2% vs. 10.9% in carriers vs. non-carriers, P = .60).
    Conclusions: PTVs influencing ANGPTL3 protein structure as well as common genetic variants influencing ANGPTL3 hepatic expression and/or blood protein levels exhibit a strong effect on circulating plasma triglyceride levels, a weak effect on circulating apoB levels, and no effect on ASCVD. Near-complete inhibition of ANGPTL3 function in patients with very elevated apoB levels may be required to reduce ASCVD risk.
    MeSH term(s) Humans ; Acute Disease ; Brain Ischemia ; Diabetes Mellitus, Type 2 ; Pancreatitis ; Stroke ; Atherosclerosis ; Coronary Artery Disease/genetics ; Angiopoietin-Like Protein 3 ; Antibodies ; Apolipoproteins B/genetics ; Triglycerides
    Chemical Substances Angiopoietin-Like Protein 3 ; Antibodies ; Apolipoproteins B ; Triglycerides ; ANGPTL3 protein, human
    Language English
    Publishing date 2024-01-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 603098-1
    ISSN 1522-9645 ; 0195-668X
    ISSN (online) 1522-9645
    ISSN 0195-668X
    DOI 10.1093/eurheartj/ehad845
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  8. Article ; Online: Genetic control of body weight by the human brain proteome.

    Gagnon, Eloi / Girard, Arnaud / Gobeil, Émilie / Bourgault, Jérôme / Couture, Christian / Mitchell, Patricia L / Bouchard, Claude / Tremblay, Angelo / Mathieu, Patrick / Michaud, Andréanne / Pérusse, Louis / Arsenault, Benoit J

    iScience

    2023  Volume 26, Issue 4, Page(s) 106376

    Abstract: Genome-wide association studies (GWAS) have identified hundreds of genetic variants associated with body weight but the biological relevance of most remains unexplored. Given the critical role of the brain in body weight regulation, we set out to ... ...

    Abstract Genome-wide association studies (GWAS) have identified hundreds of genetic variants associated with body weight but the biological relevance of most remains unexplored. Given the critical role of the brain in body weight regulation, we set out to determine whether genetic variants linked with body mass index (BMI) could be mapped to brain proteins. Using genetic colocalization, we mapped 25 loci from the largest BMI GWAS (n = 806,834) to brain protein concentrations obtained from publicly available datasets. We also performed a proteome-wide Mendelian randomization on 696 brain proteins followed by genetic colocalization and identified 35 additional brain proteins. Only a minority of these proteins (<30%) had a colocalization signal with cortex gene expression levels, highlighting the value of moving beyond gene expression levels and examining brain protein levels. In conclusion, we identified 60 unique proteins expressed in the brain that may be critical regulators of body weight in humans.
    Language English
    Publishing date 2023-03-11
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2023.106376
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  9. Article ; Online: A Simplified Version of the IASLC Grading System for Invasive Pulmonary Adenocarcinomas With Improved Prognosis Discrimination.

    Bossé, Yohan / Gagné, Andréanne / Althakfi, Wajd A / Orain, Michèle / Couture, Christian / Trahan, Sylvain / Pagé, Sylvain / Joubert, David / Fiset, Pierre O / Desmeules, Patrice / Joubert, Philippe

    The American journal of surgical pathology

    2023  Volume 47, Issue 6, Page(s) 686–693

    Abstract: Tumor grading enables better management of patients and treatment options. The International Association for the Study of Lung Cancer (IASLC) Pathology Committee has recently released a 3-tier grading system for invasive pulmonary adenocarcinoma ... ...

    Abstract Tumor grading enables better management of patients and treatment options. The International Association for the Study of Lung Cancer (IASLC) Pathology Committee has recently released a 3-tier grading system for invasive pulmonary adenocarcinoma consisting of predominant histologic patterns plus a cutoff of 20% of high-grade components including solid, micropapillary, and complex glandular patterns. The goal of this study was to validate the prognostic value of the new IASLC grading system and to compare its discriminatory performance to the predominant pattern-based grading system and a simplified version of the IASLC grading system without complex glandular patterns. This was a single-site retrospective study based on a 20-year data collection of patients that underwent lung cancer surgery. All invasive pulmonary adenocarcinomas confirmed by the histologic review were evaluated in a discovery cohort (n=676) and a validation cohort (n=717). The median duration of follow-up in the combined dataset (n=1393) was 7.5 years. The primary outcome was overall survival after surgery. The 3 grading systems had strong and relatively similar predictive performance, but the best parsimonious model was the simplified IASLC grading system (log-rank P =1.39E-13). The latter was strongly associated with survival in the validation set ( P =1.1E-18) and the combined set ( P =5.01E-35). We observed a large proportion of patients upgraded to the poor prognosis group using the IASLC grading system, which was attenuated when using the simplified IASLC grading system. In conclusion, we identified a histologic simpler classification for invasive pulmonary adenocarcinomas that outperformed the recently proposed IASLC grading system. A simplified grading system is clinically convenient and will facilitate widespread implementation.
    MeSH term(s) Humans ; Retrospective Studies ; Adenocarcinoma/pathology ; Neoplasm Staging ; Adenocarcinoma of Lung/surgery ; Adenocarcinoma of Lung/pathology ; Lung Neoplasms/pathology ; Prognosis
    Language English
    Publishing date 2023-04-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 752964-8
    ISSN 1532-0979 ; 0147-5185
    ISSN (online) 1532-0979
    ISSN 0147-5185
    DOI 10.1097/PAS.0000000000002040
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  10. Article ; Online: Polygenic Risk Score for Coronary Artery Disease Improves the Prediction of Early-Onset Myocardial Infarction and Mortality in Men.

    Manikpurage, Hasanga D / Eslami, Aida / Perrot, Nicolas / Li, Zhonglin / Couture, Christian / Mathieu, Patrick / Bossé, Yohan / Arsenault, Benoit J / Thériault, Sébastien

    Circulation. Genomic and precision medicine

    2021  Volume 14, Issue 6, Page(s) e003452

    Abstract: Background: Several risk factors for coronary artery disease (CAD) have been described, some of which are genetically determined. The use of a polygenic risk score (PRS) could improve CAD risk assessment, but predictive accuracy according to age and sex ...

    Abstract Background: Several risk factors for coronary artery disease (CAD) have been described, some of which are genetically determined. The use of a polygenic risk score (PRS) could improve CAD risk assessment, but predictive accuracy according to age and sex is not well established.
    Methods: A PRS
    Results: From 7746 incident MI cases and 393 725 controls, hazard ratio for MI reached 1.53 (95% CI, 1.49-1.56;
    Conclusions: Our PRS
    MeSH term(s) Adult ; Coronary Artery Disease/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction/epidemiology ; Proportional Hazards Models ; Risk Assessment ; Risk Factors
    Language English
    Publishing date 2021-10-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2574-8300
    ISSN (online) 2574-8300
    DOI 10.1161/CIRCGEN.121.003452
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