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Al Tabosh T, Liu H, Koça D, Al Tarrass M, Tu L, Giraud S, Delagrange L, Beaudoin M, Rivière S, Grobost V, Rondeau-Lutz M, Dupuis O, Ricard N, Tillet E, Machillot P, Salomon A, Picart C, Battail C, Dupuis-Girod S, Guignabert C, Desroches-Castan A, Bailly S. Impact of heterozygous ALK1 mutations on the transcriptomic response to BMP9 and BMP10 in endothelial cells from hereditary hemorrhagic telangiectasia and pulmonary arterial hypertension donors. Angiogenesis 2024; 27:211-227. [PMID: 38294582 PMCID: PMC11021321 DOI: 10.1007/s10456-023-09902-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 12/03/2023] [Indexed: 02/01/2024]
Abstract
Heterozygous activin receptor-like kinase 1 (ALK1) mutations are associated with two vascular diseases: hereditary hemorrhagic telangiectasia (HHT) and more rarely pulmonary arterial hypertension (PAH). Here, we aimed to understand the impact of ALK1 mutations on BMP9 and BMP10 transcriptomic responses in endothelial cells. Endothelial colony-forming cells (ECFCs) and microvascular endothelial cells (HMVECs) carrying loss of function ALK1 mutations were isolated from newborn HHT and adult PAH donors, respectively. RNA-sequencing was performed on each type of cells compared to controls following an 18 h stimulation with BMP9 or BMP10. In control ECFCs, BMP9 and BMP10 stimulations induced similar transcriptomic responses with around 800 differentially expressed genes (DEGs). ALK1-mutated ECFCs unexpectedly revealed highly similar transcriptomic profiles to controls, both at the baseline and upon stimulation, and normal activation of Smad1/5 that could not be explained by a compensation in cell-surface ALK1 level. Conversely, PAH HMVECs revealed strong transcriptional dysregulations compared to controls with > 1200 DEGs at the baseline. Consequently, because our study involved two variables, ALK1 genotype and BMP stimulation, we performed two-factor differential expression analysis and identified 44 BMP9-dysregulated genes in mutated HMVECs, but none in ECFCs. Yet, the impaired regulation of at least one hit, namely lunatic fringe (LFNG), was validated by RT-qPCR in three different ALK1-mutated endothelial models. In conclusion, ALK1 heterozygosity only modified the BMP9/BMP10 regulation of few genes, including LFNG involved in NOTCH signaling. Future studies will uncover whether dysregulations in such hits are enough to promote HHT/PAH pathogenesis, making them potential therapeutic targets, or if second hits are necessary.
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Affiliation(s)
- T Al Tabosh
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - H Liu
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - D Koça
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - M Al Tarrass
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - L Tu
- Faculté de Médecine, Pulmonary Hypertension: Pathophysiology and Novel Therapies, Université Paris-Saclay, 94276, Le Kremlin-Bicêtre, France
- INSERM UMR_S 999 «Pulmonary Hypertension: Pathophysiology and Novel Therapies», Hôpital Marie Lannelongue, 92350, Le Plessis-Robinson, France
| | - S Giraud
- Genetics Department, Femme-Mère-Enfants Hospital, Hospices Civils de Lyon, 69677, Bron, France
| | - L Delagrange
- Genetics Department, Femme-Mère-Enfants Hospital, Hospices Civils de Lyon, 69677, Bron, France
- National Reference Center for HHT, 69677, Bron, France
| | - M Beaudoin
- Genetics Department, Femme-Mère-Enfants Hospital, Hospices Civils de Lyon, 69677, Bron, France
- National Reference Center for HHT, 69677, Bron, France
| | - S Rivière
- Internal Medicine Department, CHU of Montpellier, St Eloi Hospital and Center of Clinical Investigation, INSERM, CIC 1411, 34295, Montpellier Cedex 7, France
| | - V Grobost
- Internal Medicine Department, CHU Estaing, 63100, Clermont-Ferrand, France
| | - M Rondeau-Lutz
- Internal Medicine Department, University Hospital of Strasbourg, 67091, Strasbourg Cedex, France
| | - O Dupuis
- Hôpital Lyon SUD, Hospices Civils de Lyon, Université Claude Bernard Lyon 1, 69100, Villeurbanne, France
- Faculty of Medicine, Lyon University, 69921, Lyon, France
| | - N Ricard
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - E Tillet
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - P Machillot
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - A Salomon
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - C Picart
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - C Battail
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - S Dupuis-Girod
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
- Genetics Department, Femme-Mère-Enfants Hospital, Hospices Civils de Lyon, 69677, Bron, France
- National Reference Center for HHT, 69677, Bron, France
| | - C Guignabert
- Faculté de Médecine, Pulmonary Hypertension: Pathophysiology and Novel Therapies, Université Paris-Saclay, 94276, Le Kremlin-Bicêtre, France
- INSERM UMR_S 999 «Pulmonary Hypertension: Pathophysiology and Novel Therapies», Hôpital Marie Lannelongue, 92350, Le Plessis-Robinson, France
| | - A Desroches-Castan
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France
| | - S Bailly
- Biosanté unit U1292, Grenoble Alpes University, INSERM, CEA, 38000, Grenoble, France.
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Beaudoin M, Dellazizzo L, Giguère S, Guay JP, Giguère CE, Potvin S, Dumais A. Is There a Dose-Response Relationship Between Cannabis Use and Violence? A Longitudinal Study in Individuals with Severe Mental Disorders. Cannabis Cannabinoid Res 2024; 9:241-251. [PMID: 36787482 DOI: 10.1089/can.2022.0038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Introduction: Recent longitudinal studies point toward the existence of a positive relationship between cannabis use and violence in people with severe mental disorders (SMD). However, the existence of a dose-response relationship between the frequency/severity of cannabis use and violence has seldom been investigated. Therefore, this study aims to determine if such a relationship exists in a psychiatric population. Methods: To do so, a total of 98 outpatients (81 males and 17 females, all over 18 years of age) with SMD were recruited at the Institut universitaire de santé mentale de Montréal (Montréal, Canada) and included in the analyses. Clinical evaluations were conducted every 3 months for a year. Substance use, violent behaviors, and potential covariables were assessed through self-reported assessments, urinary testing, as well as clinical, criminal, and police records. Using generalized estimating equations, the association between cannabis use frequency (nonusers, occasional, regular, and frequent users) and violence was investigated, as well as the association between the severity of cannabis use and violent behaviors. Results: It was found that cannabis use frequency and severity were significant predictors of violent behaviors. After adjustment for time, age, sex, ethnicity, diagnoses, impulsivity, and use of alcohol and stimulants, odds ratios were of 1.91 (p<0.001) between each frequency profile and 1.040 (p<0.001) for each increase of one point of the severity of cannabis use score (ranging from 0 to 79). Conclusions: Despite the high attrition rate, these findings may have important implications for clinicians as cannabis use may have serious consequences in psychiatric populations. Nevertheless, the mechanisms underlying this association remain unclear.
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Affiliation(s)
- Mélissa Beaudoin
- Psychiatry and Addictology Department, Faculty of Medicine, University of Montreal, Montreal, Canada
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
- Faculty of Medicine, McGill University, Montreal, Canada
| | - Laura Dellazizzo
- Psychiatry and Addictology Department, Faculty of Medicine, University of Montreal, Montreal, Canada
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
| | - Sabrina Giguère
- Psychiatry and Addictology Department, Faculty of Medicine, University of Montreal, Montreal, Canada
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
| | - Jean-Pierre Guay
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, Canada
- Faculty of Arts and Sciences, Criminology School, University of Montreal, Montreal, Canada
- Centre International de Criminologie Comparée, Montreal, Canada
| | | | - Stéphane Potvin
- Psychiatry and Addictology Department, Faculty of Medicine, University of Montreal, Montreal, Canada
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
| | - Alexandre Dumais
- Psychiatry and Addictology Department, Faculty of Medicine, University of Montreal, Montreal, Canada
- Research Center, Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, Canada
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Hudon A, Beaudoin M, Phraxayavong K, Potvin S, Dumais A. Enhancing Predictive Power: Integrating a Linear Support Vector Classifier with Logistic Regression for Patient Outcome Prognosis in Virtual Reality Therapy for Treatment-Resistant Schizophrenia. J Pers Med 2023; 13:1660. [PMID: 38138887 PMCID: PMC10744538 DOI: 10.3390/jpm13121660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/11/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023] Open
Abstract
(1) Background: Approximately 30% of schizophrenia patients are known to be treatment-resistant. For these cases, more personalized approaches must be developed. Virtual reality therapeutic approaches such as avatar therapy (AT) are currently undergoing investigations to address these patients' needs. To further tailor the therapeutic trajectory of patients presenting with this complex presentation of schizophrenia, quantitative insight about the therapeutic process is warranted. The aim of the study is to combine a classification model with a regression model with the aim of predicting the therapeutic outcomes of patients based on the interactions taking place during their first immersive session of virtual reality therapy. (2) Methods: A combination of a Linear Support Vector Classifier and logistic regression was conducted over a dataset comprising 162 verbatims of the immersive sessions of 18 patients who previously underwent AT. As a testing dataset, 17 participants, unknown to the dataset, had their first immersive session presented to the combinatory model to predict their clinical outcome. (3) Results: The model accurately predicted the clinical outcome for 15 out of the 17 participants. Classification of the therapeutic interactions achieved an accuracy of 63%. (4) Conclusion: To our knowledge, this is the first attempt to predict the outcome of psychotherapy patients based on the content of their interactions with their therapist. These results are important as they open the door to personalization of psychotherapy based on quantitative information about the interactions taking place during AT.
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Affiliation(s)
- Alexandre Hudon
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3V2, Canada; (A.H.); (M.B.); (S.P.)
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Mélissa Beaudoin
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3V2, Canada; (A.H.); (M.B.); (S.P.)
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | | | - Stéphane Potvin
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3V2, Canada; (A.H.); (M.B.); (S.P.)
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Alexandre Dumais
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3V2, Canada; (A.H.); (M.B.); (S.P.)
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1N 3V2, Canada;
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, QC H1C 1H1, Canada
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Hudon A, Beaudoin M, Phraxayavong K, Potvin S, Dumais A. Unsupervised Machine Learning Driven Analysis of Verbatims of Treatment-Resistant Schizophrenia Patients Having Followed Avatar Therapy. J Pers Med 2023; 13:jpm13050801. [PMID: 37240971 DOI: 10.3390/jpm13050801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
(1) Background: The therapeutic mechanisms underlying psychotherapeutic interventions for individuals with treatment-resistant schizophrenia are mostly unknown. One of these treatment techniques is avatar therapy (AT), in which the patient engages in immersive sessions while interacting with an avatar representing their primary persistent auditory verbal hallucination. The aim of this study was to conduct an unsupervised machine-learning analysis of verbatims of treatment-resistant schizophrenia patients that have followed AT. The second aim of the study was to compare the data clusters obtained from the unsupervised machine-learning analysis with previously conducted qualitative analysis. (2) Methods: A k-means algorithm was performed over the immersive-session verbatims of 18 patients suffering from treatment-resistant schizophrenia who followed AT to cluster interactions of the avatar and the patient. Data were pre-processed using vectorization and data reduction. (3): Results: Three clusters of interactions were identified for the avatar's interactions whereas four clusters were identified for the patient's interactions. (4) Conclusion: This study was the first attempt to conduct unsupervised machine learning on AT and provided a quantitative insight into the inner interactions that take place during immersive sessions. The use of unsupervised machine learning could yield a better understanding of the type of interactions that take place in AT and their clinical implications.
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Affiliation(s)
- Alexandre Hudon
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Mélissa Beaudoin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3G 2M1, Canada
| | - Kingsada Phraxayavong
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3J4, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1C 1H1, Canada
| | - Stéphane Potvin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Alexandre Dumais
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1C 1H1, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, QC H1C 1H1, Canada
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Giguère S, Potvin S, Beaudoin M, Dellazizzo L, Giguère CÉ, Furtos A, Gilbert K, Phraxayavong K, Dumais A. Avatar Intervention for Cannabis Use Disorder in Individuals with Severe Mental Disorders: A Pilot Study. J Pers Med 2023; 13:jpm13050766. [PMID: 37240936 DOI: 10.3390/jpm13050766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/22/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Cannabis use disorder (CUD) is a complex issue, even more so when it is comorbid with a severe mental disorder (SMD). Available interventions are at best slightly effective, and their effects are not maintained over time. Therefore, the integration of virtual reality (VR) may increase efficacy; however, it has not yet been investigated in the treatment of CUD. A novel approach, avatar intervention for CUD, uses existing therapeutic techniques from other recommended therapies (e.g., cognitive behavioral methods, motivational interviewing) and allows participants to practice them in real-time. During immersive sessions, participants are invited to interact with an avatar representing a significant person related to their drug use. This pilot clinical trial aimed to evaluate the short-term efficacity of avatar intervention for CUD on 19 participants with a dual diagnosis of SMD and CUD. Results showed a significant moderate reduction in the quantity of cannabis use (Cohen's d = 0.611, p = 0.004), which was confirmed via urinary quantification of cannabis use. Overall, this unique intervention shows promising results. Longer-term results, as well as comparison with classical interventions in a larger sample, are warranted through a future single-blind randomized controlled trial.
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Affiliation(s)
- Sabrina Giguère
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
| | - Stéphane Potvin
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
| | - Mélissa Beaudoin
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3G 2M1, Canada
| | - Laura Dellazizzo
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
| | - Charles-Édouard Giguère
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
| | - Alexandra Furtos
- Department of Chemistry, University of Montreal, Montreal, QC H2V 0B3, Canada
| | - Karine Gilbert
- Department of Chemistry, University of Montreal, Montreal, QC H2V 0B3, Canada
| | - Kingsada Phraxayavong
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1N 3V2, Canada
| | - Alexandre Dumais
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1N 3V2, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, QC H1C 1H1, Canada
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Hudon A, Couture J, Dellazizzo L, Beaudoin M, Phraxayavong K, Potvin S, Dumais A. Dyadic Interactions of Treatment-Resistant Schizophrenia Patients Having Followed Virtual Reality Therapy: A Content Analysis. J Clin Med 2023; 12:jcm12062299. [PMID: 36983300 PMCID: PMC10053204 DOI: 10.3390/jcm12062299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/03/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023] Open
Abstract
(1) Background: Very little is known about the inner therapeutic processes of psychotherapy interventions for patients suffering from treatment-resistant schizophrenia. Avatar therapy (AT) is one such modalities in which the patient is undergoing immersive sessions in which they interact with an Avatar representing their main persistent auditory verbal hallucination. The aim of this study is to identify the most prevalent dyadic interactions between the patient and the Avatar in AT for patient’s suffering from TRS. (2) Methods: A content analysis of 256 verbatims originating from 32 patients who completed AT between 2017 and 2022 at the Institut universitaire en santé mentale de Montréal was conducted to identify dyadic interactions between the patients and their Avatar. (3) Results: Five key dyads were identified to occur on average more than 10 times for each participant during the immersive sessions across their AT: (Avatar: Reinforcement, Patient: Self-affirmation), (Avatar: Provocation, Patient: Self-affirmation), (Avatar: Coping mechanisms, Patient: Prevention), (Patient: Self-affirmation, Avatar: Reinforcement), and (Patient: Self-appraisal, Avatar: Reinforcement). (4) Conclusion: These dyads offer a first qualitative insight to the interpersonal dynamics and patient-avatar relationships taking place during AT. Future studies on the implication of such dyadic interactions with the therapeutic outcome of AT should be conducted considering the importance of dyadic relationships in psychotherapy.
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Affiliation(s)
- Alexandre Hudon
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montréal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Jonathan Couture
- Faculty of Medicine, Department of Medicine, Campus Montréal, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Laura Dellazizzo
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montréal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Mélissa Beaudoin
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montréal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | | | - Stéphane Potvin
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montréal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Alexandre Dumais
- Centre de Recherche de l’Institut Universitaire en Santé Mentale de Montréal, Montréal, QC H1N 3J4, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
- Services et Recherches Psychiatriques AD, Montréal, QC H1C 1H1, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montréal, QC H1C 1H1, Canada
- Correspondence:
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Beaudoin M, Potvin S, Phraxayavong K, Dumais A. Changes in Quality of Life in Treatment-Resistant Schizophrenia Patients Undergoing Avatar Therapy: A Content Analysis. J Pers Med 2023; 13:jpm13030522. [PMID: 36983704 PMCID: PMC10058174 DOI: 10.3390/jpm13030522] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 03/15/2023] Open
Abstract
Avatar Therapy has a significant impact on symptoms, beliefs, and quality of life of patients with treatment-resistant schizophrenia. However, little is known about how these changes are implemented into their lives and to which aspects of their lives these improvements relate. Ten consecutive patients enrolled in an ongoing clinical trial were assessed using semi-guided interviews before as well as three months after Avatar Therapy. These encounters have been recorded and transcribed so that the discourse could be thoroughly analyzed, leading to the generation of an extensive theme grid. As the cases were analyzed, the grid was adapted in a back-and-forth manner until data saturation occurred. The content analysis allowed the identification of nine main themes representing different aspects of the patients’ lives, each of which was subdivided into more specific codes. By analyzing the evolution of their frequency, it was observed that, following therapy, patients presented with fewer psychotic symptoms, better self-esteem, more hobbies and projects, and an overall improved lifestyle and mood. Finally, investigating the impact of Avatar Therapy on quality of life allows for a deeper understanding of how people with treatment-resistant schizophrenia can achieve meaningful changes and move towards a certain recovery process.
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Affiliation(s)
- Mélissa Beaudoin
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3G 2M1, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Correspondence: (M.B.); (A.D.); Tel.: +1-514-251-4015 (A.D.)
| | - Stephane Potvin
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
| | - Kingsada Phraxayavong
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1N 3V2, Canada
| | - Alexandre Dumais
- Department of Psychiatry and Addictology, University of Montreal, Montreal, QC H3T 1J4, Canada
- Research Center of the University Institute in Mental Health of Montreal, Montreal, QC H1N 3V2, Canada
- Services et Recherches Psychiatriques AD, Montreal, QC H1N 3V2, Canada
- Institut National de Psychiatrie Légale Philippe-Pinel, Montreal, QC H1C 1H1, Canada
- Correspondence: (M.B.); (A.D.); Tel.: +1-514-251-4015 (A.D.)
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Wünnemann F, Fotsing Tadjo T, Beaudoin M, Lalonde S, Lo KS, Kleinstiver BP, Lettre G. Multimodal CRISPR perturbations of GWAS loci associated with coronary artery disease in vascular endothelial cells. PLoS Genet 2023; 19:e1010680. [PMID: 36928188 PMCID: PMC10047545 DOI: 10.1371/journal.pgen.1010680] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 03/28/2023] [Accepted: 02/25/2023] [Indexed: 03/18/2023] Open
Abstract
Genome-wide association studies have identified >250 genetic variants associated with coronary artery disease (CAD), but the causal variants, genes and molecular mechanisms remain unknown at most loci. We performed pooled CRISPR screens to test the impact of sequences at or near CAD-associated genetic variants on vascular endothelial cell functions. Using CRISPR knockout, inhibition and activation, we targeted 1998 variants at 83 CAD loci to assess their effect on three adhesion proteins (E-selectin, ICAM1, VCAM1) and three key endothelial functions (nitric oxide and reactive oxygen species production, calcium signalling). At a false discovery rate ≤10%, we identified significant CRISPR perturbations near 42 variants located within 26 CAD loci. We used base editing to validate a putative causal variant in the promoter of the FES gene. Although a few of the loci include genes previously characterized in endothelial cells (e.g. AIDA, ARHGEF26, ADAMTS7), most are implicated in endothelial dysfunction for the first time. Detailed characterization of one of these new loci implicated the RNA helicase DHX38 in vascular endothelial cell senescence. While promising, our results also highlighted several limitations in using CRISPR perturbations to functionally dissect GWAS loci, including an unknown false negative rate and potential off-target effects.
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Affiliation(s)
| | | | | | | | - Ken Sin Lo
- Montreal Heart Institute, Montréal, Québec, Canada
| | - Benjamin P. Kleinstiver
- Center for Genomic Medicine and Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Department of Pathology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Guillaume Lettre
- Montreal Heart Institute, Montréal, Québec, Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada
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Hudon A, Beaudoin M, Phraxayavong K, Dellazizzo L, Potvin S, Dumais A. Implementation of a machine learning algorithm for automated thematic annotations in avatar: A linear support vector classifier approach. Health Informatics J 2022; 28:14604582221142442. [DOI: 10.1177/14604582221142442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Avatar Therapy (AT) is a modern therapeutic alternative for patients with schizophrenia suffering from persistent auditory verbal hallucinations. Its intrinsic therapeutical process is currently qualitatively analyzed via human coders that annotate session transcripts. This process is time and resource demanding. This creates a need to find potential algorithms that can operate on small datasets and perform such annotations. The first objective of this study is to conduct the automated text classification of interactions in AT and the second objective is to assess if this classification is comparable to the classification done by human coders. A Linear Support Vector Classifier was implemented to perform automated theme classifications on Avatar Therapy session transcripts with the use of a limited dataset with an accuracy of 66.02% and substantial classification agreement of 0.647. These results open the door to additional research such as predicting the outcome of a therapy.
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Affiliation(s)
- Alexandre Hudon
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Mélissa Beaudoin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | | | - Laura Dellazizzo
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Stéphane Potvin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Alexandre Dumais
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada; Services et Recherches Psychiatriques AD, Montreal, QC, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada; Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada
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Hudon A, Beaudoin M, Phraxayavong K, Dellazizzo L, Potvin S, Dumais A. Use of Automated Thematic Annotations for Small Data Sets in a Psychotherapeutic Context: Systematic Review of Machine Learning Algorithms. JMIR Ment Health 2021; 8:e22651. [PMID: 34677133 PMCID: PMC8571689 DOI: 10.2196/22651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/06/2020] [Accepted: 07/27/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND A growing body of literature has detailed the use of qualitative analyses to measure the therapeutic processes and intrinsic effectiveness of psychotherapies, which yield small databases. Nonetheless, these approaches have several limitations and machine learning algorithms are needed. OBJECTIVE The objective of this study is to conduct a systematic review of the use of machine learning for automated text classification for small data sets in the fields of psychiatry, psychology, and social sciences. This review will identify available algorithms and assess if automated classification of textual entities is comparable to the classification done by human evaluators. METHODS A systematic search was performed in the electronic databases of Medline, Web of Science, PsycNet (PsycINFO), and Google Scholar from their inception dates to 2021. The fields of psychiatry, psychology, and social sciences were selected as they include a vast array of textual entities in the domain of mental health that can be reviewed. Additional records identified through cross-referencing were used to find other studies. RESULTS This literature search identified 5442 articles that were eligible for our study after the removal of duplicates. Following abstract screening, 114 full articles were assessed in their entirety, of which 107 were excluded. The remaining 7 studies were analyzed. Classification algorithms such as naive Bayes, decision tree, and support vector machine classifiers were identified. Support vector machine is the most used algorithm and best performing as per the identified articles. Prediction classification scores for the identified algorithms ranged from 53%-91% for the classification of textual entities in 4-7 categories. In addition, 3 of the 7 studies reported an interjudge agreement statistic; these were consistent with agreement statistics for text classification done by human evaluators. CONCLUSIONS A systematic review of available machine learning algorithms for automated text classification for small data sets in several fields (psychiatry, psychology, and social sciences) was conducted. We compared automated classification with classification done by human evaluators. Our results show that it is possible to automatically classify textual entities of a transcript based solely on small databases. Future studies are nevertheless needed to assess whether such algorithms can be implemented in the context of psychotherapies.
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Affiliation(s)
- Alexandre Hudon
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montréal, QC, Canada.,Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Mélissa Beaudoin
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montréal, QC, Canada.,Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | | | - Laura Dellazizzo
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montréal, QC, Canada.,Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Stéphane Potvin
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montréal, QC, Canada.,Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Alexandre Dumais
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montréal, QC, Canada.,Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada.,Services et Recherches Psychiatriques AD, Montréal, QC, Canada.,Institut national de psychiatrie légale Philippe-Pinel, Montréal, QC, Canada
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11
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Beaudoin M, Potvin S, Hudon A, Giguère CE, Dumais A. Prediction of quality of life in schizophrenia using machine learning models on data from clinical antipsychotic trials of intervention effectiveness (CATIE) schizophrenia trial. Eur Psychiatry 2021. [PMCID: PMC9471565 DOI: 10.1192/j.eurpsy.2021.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Introduction Schizophrenia is a chronic and severe mental disorder. While research focus remains mainly on negative outcomes, it is questionable whether we are placing enough emphasis on improving their sense of well-being and functioning. This could be accessed through the study of the quality of life (QoL). To date, QoL prediction models mainly focused on neurocognition and psychotic symptoms, but their predictive power remained limited. Objectives The aim is to accurately predict the QoL within schizophrenia using unsupervised learning methods. Methods We computed variables from 952 patients from the CATIE study, a randomized, double-blind clinical trial for schizophrenia treatment. QoL was measured using the Heinrichs-Carpenter Quality of Life Scale and potential predictors included almost all available variables: symptoms, neurocognition, medication adherence, insight, adverse effects, etc. By optimizing parameters to reach optimal models, three linear regressions were calculated: (1) baseline predictors of 12-month QoL, (2) 6-month predictors of 12-month QoL, and (3) baseline predictors of 6-month QoL. Adjustments were made to ensure that included variables were not collinear nor redundant with QoL. Results Calculated models had adjusted R-squared of 0.918, 0.922 and 0.913, respectively. Best predictors were medication side effects, sociodemographic and neurocognitive variables. Low psychotic and depressive symptoms were also included, as well as lab values suggesting the absence of problems with chloremia and calcemia. Conclusions Calculated predictive models explain almost all subsequent QoL. It appears that physical health variables, generally omitted from mental health-related studies, have an important impact on patients’ QoL. Therefore, interventions should also consider these aspects. Disclosure No significant relationships.
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Lebert-Charron A, Boujut E, Beaudoin M, Quintard B. Du stress au burnout scolaire : définitions, déterminants pychosociaux, évaluation et pistes de prévention. PRAT PSYCHOL 2021. [DOI: 10.1016/j.prps.2019.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Beaudoin M, Potvin S, Machalani A, Dellazizzo L, Bourguignon L, Phraxayavong K, Dumais A. The therapeutic processes of avatar therapy: A content analysis of the dialogue between treatment-resistant patients with schizophrenia and their avatar. Clin Psychol Psychother 2021; 28:500-518. [PMID: 33484042 DOI: 10.1002/cpp.2556] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/21/2020] [Accepted: 01/05/2021] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Because the therapeutic processes of Avatar Therapy remain equivocal, the current study aims to further extend our previous findings by analysing the evolution of the avatars' and patients' speech and changes in patient responses as sessions progressed. DESIGN Eighteen patients with treatment-resistant schizophrenia were selected from two clinical trials on Avatar Therapy. Three coders analysed both the avatars' and patients' discourse during immersive therapy sessions using content analysis methods. RESULTS Our analyses enabled the categorization of the avatar discourse into confrontational techniques (e.g., provocation) and positive techniques (e.g., reinforcement). Patients responded to these utterances using coping mechanism or by expressing emotions, beliefs, self-perceptions or aspirations. Through identification of mutual changes in the interaction between the patient and their avatar, a shift was observed over the sessions from confrontation to a constructive dialogue. Assertiveness, emotional responses and prevention strategies seemed to be central to the therapeutic process, and these usually occur in response to positive techniques. CONCLUSION Investigating AT's therapeutic process may help to identify components to achieve positive outcomes and can enable the development of more effective treatments. Further studies should explore the association between these themes and therapeutic response to help predict which patients will better respond to Avatar Therapy.
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Affiliation(s)
- Mélissa Beaudoin
- Department of Psychiatry and Addictology, Université de Montréal, Montreal, Canada
- Faculty of Medicine, McGill University, Montreal, Canada
- Research Center, University Institute in Mental Health of Montreal, Montreal, Canada
| | - Stéphane Potvin
- Department of Psychiatry and Addictology, Université de Montréal, Montreal, Canada
- Research Center, University Institute in Mental Health of Montreal, Montreal, Canada
| | - Alexandra Machalani
- Faculty of Medicine, McGill University, Montreal, Canada
- Université du Québec à Trois-Rivières, Trois-Rivières, Canada
| | - Laura Dellazizzo
- Department of Psychiatry and Addictology, Université de Montréal, Montreal, Canada
- Research Center, University Institute in Mental Health of Montreal, Montreal, Canada
| | - Lysandre Bourguignon
- Department of Psychiatry and Addictology, Université de Montréal, Montreal, Canada
- Research Center, University Institute in Mental Health of Montreal, Montreal, Canada
| | | | - Alexandre Dumais
- Department of Psychiatry and Addictology, Université de Montréal, Montreal, Canada
- Research Center, University Institute in Mental Health of Montreal, Montreal, Canada
- Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada
- Services et Recherches Psychiatriques AD, Montreal, Canada
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14
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Chen MH, Raffield LM, Mousas A, Sakaue S, Huffman JE, Moscati A, Trivedi B, Jiang T, Akbari P, Vuckovic D, Bao EL, Zhong X, Manansala R, Laplante V, Chen M, Lo KS, Qian H, Lareau CA, Beaudoin M, Hunt KA, Akiyama M, Bartz TM, Ben-Shlomo Y, Beswick A, Bork-Jensen J, Bottinger EP, Brody JA, van Rooij FJA, Chitrala K, Cho K, Choquet H, Correa A, Danesh J, Di Angelantonio E, Dimou N, Ding J, Elliott P, Esko T, Evans MK, Floyd JS, Broer L, Grarup N, Guo MH, Greinacher A, Haessler J, Hansen T, Howson JMM, Huang QQ, Huang W, Jorgenson E, Kacprowski T, Kähönen M, Kamatani Y, Kanai M, Karthikeyan S, Koskeridis F, Lange LA, Lehtimäki T, Lerch MM, Linneberg A, Liu Y, Lyytikäinen LP, Manichaikul A, Martin HC, Matsuda K, Mohlke KL, Mononen N, Murakami Y, Nadkarni GN, Nauck M, Nikus K, Ouwehand WH, Pankratz N, Pedersen O, Preuss M, Psaty BM, Raitakari OT, Roberts DJ, Rich SS, Rodriguez BAT, Rosen JD, Rotter JI, Schubert P, Spracklen CN, Surendran P, Tang H, Tardif JC, Trembath RC, Ghanbari M, Völker U, Völzke H, Watkins NA, Zonderman AB, Wilson PWF, Li Y, Butterworth AS, Gauchat JF, Chiang CWK, Li B, Loos RJF, Astle WJ, Evangelou E, van Heel DA, Sankaran VG, Okada Y, Soranzo N, Johnson AD, Reiner AP, Auer PL, Lettre G. Trans-ethnic and Ancestry-Specific Blood-Cell Genetics in 746,667 Individuals from 5 Global Populations. Cell 2020; 182:1198-1213.e14. [PMID: 32888493 PMCID: PMC7480402 DOI: 10.1016/j.cell.2020.06.045] [Citation(s) in RCA: 275] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 04/16/2020] [Accepted: 06/29/2020] [Indexed: 12/14/2022]
Abstract
Most loci identified by GWASs have been found in populations of European ancestry (EUR). In trans-ethnic meta-analyses for 15 hematological traits in 746,667 participants, including 184,535 non-EUR individuals, we identified 5,552 trait-variant associations at p < 5 × 10-9, including 71 novel associations not found in EUR populations. We also identified 28 additional novel variants in ancestry-specific, non-EUR meta-analyses, including an IL7 missense variant in South Asians associated with lymphocyte count in vivo and IL-7 secretion levels in vitro. Fine-mapping prioritized variants annotated as functional and generated 95% credible sets that were 30% smaller when using the trans-ethnic as opposed to the EUR-only results. We explored the clinical significance and predictive value of trans-ethnic variants in multiple populations and compared genetic architecture and the effect of natural selection on these blood phenotypes between populations. Altogether, our results for hematological traits highlight the value of a more global representation of populations in genetic studies.
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Affiliation(s)
- Ming-Huei Chen
- The Framingham Heart Study, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA; Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA
| | - Laura M Raffield
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Abdou Mousas
- Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - Saori Sakaue
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan; Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan
| | - Jennifer E Huffman
- Massachusetts Veterans Epidemiology Research and Information Center (MAVERIC), VA Boston Healthcare System, Boston, MA 02130, USA
| | - Arden Moscati
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Bhavi Trivedi
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Tao Jiang
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
| | - Parsa Akbari
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; MRC Biostatistics Unit, University of Cambridge, Cambridge CB2 0SR, UK; Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK; The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK
| | | | - Erik L Bao
- Division of Hematology/Oncology, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02446, USA
| | - Xue Zhong
- Division of Genetic Medicine, Department of Medicine, Vanderbilt University, Nashville, TN 37232, USA
| | - Regina Manansala
- Zilber School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA
| | - Véronique Laplante
- Département de Pharmacologie et Physiologie, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Minhui Chen
- Center for Genetic Epidemiology, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Ken Sin Lo
- Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - Huijun Qian
- Department of Statistics and Operation Research, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Caleb A Lareau
- Division of Hematology/Oncology, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02446, USA
| | | | - Karen A Hunt
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Masato Akiyama
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan; Department of Ocular Pathology and Imaging Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Traci M Bartz
- Department of Biostatistics, University of Washington, Seattle, WA 98101, USA
| | - Yoav Ben-Shlomo
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK
| | - Andrew Beswick
- Translational Health Sciences, Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, Bristol BS10 5NB, UK
| | - Jette Bork-Jensen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Erwin P Bottinger
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Hasso-Plattner-Institut, Universität Potsdam, Potsdam 14469, Germany
| | - Jennifer A Brody
- Department of Medicine, University of Washington, Seattle, WA 98101, USA
| | - Frank J A van Rooij
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam 3015, the Netherlands
| | - Kumaraswamynaidu Chitrala
- Laboratory of Epidemiology and Population Science, National Institute on Aging/NIH, Baltimore, MD 21224, USA
| | - Kelly Cho
- Massachusetts Veterans Epidemiology Research and Information Center (MAVERIC), VA Boston Healthcare System, Boston, MA 02130, USA; Department of Medicine, Division on Aging, Brigham and Women's Hospital, Boston, MA 02115, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Hélène Choquet
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Adolfo Correa
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - John Danesh
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK; The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK; Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge CB10 1SA, UK; National Institute for Health Research Cambridge Biomedical Research Centre, Cambridge University Hospitals, Cambridge CB2 0QQ, UK; British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK
| | - Emanuele Di Angelantonio
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK; Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge CB10 1SA, UK; National Institute for Health Research Cambridge Biomedical Research Centre, Cambridge University Hospitals, Cambridge CB2 0QQ, UK; British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK
| | - Niki Dimou
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon 69008, France; Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina 45110, Greece
| | - Jingzhong Ding
- Department of Internal Medicine, Section of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA
| | - Paul Elliott
- Department of Epidemiology and Biostatistics, Imperial College London, London W2 1PG, UK; Imperial Biomedical Research Centre, Imperial College London and Imperial College NHS Healthcare Trust, London SW7 2AZ, UK; Medical Research Council-Public Health England Centre for Environment, Imperial College London, London SW7 2AZ, UK; UK Dementia Research Institute, Imperial College London, London SW7 2AZ, UK; Health Data Research UK - London, London SW7 2AZ, UK
| | - Tõnu Esko
- Broad Institute of Harvard and MIT, Cambridge, MA 02446, USA
| | - Michele K Evans
- Laboratory of Epidemiology and Population Science, National Institute on Aging/NIH, Baltimore, MD 21224, USA
| | - James S Floyd
- Department of Medicine, University of Washington, Seattle, WA 98101, USA; Department of Epidemiology, University of Washington, Seattle, WA 98101, USA
| | - Linda Broer
- Department of Internal Medicine, Erasmus University Medical Center Rotterdam, Rotterdam 3015, the Netherlands
| | - Niels Grarup
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Michael H Guo
- Broad Institute of Harvard and MIT, Cambridge, MA 02446, USA; Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Andreas Greinacher
- Institute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald 17475, Germany
| | - Jeff Haessler
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Torben Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Joanna M M Howson
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; Novo Nordisk Research Centre Oxford, Innovation Building, Old Road Campus, Oxford OX3 7FZ, UK
| | - Qin Qin Huang
- Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK
| | - Wei Huang
- Department of Genetics, Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center and Shanghai Industrial Technology Institute (SITI), Shanghai 201203, China
| | - Eric Jorgenson
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Tim Kacprowski
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald 17475, Germany; Chair of Experimental Bioinformatics, Research Group Computational Systems Medicine, Technical University of Munich, Freising-Weihenstephan 85354, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald 17475, Germany
| | - Mika Kähönen
- Department of Clinical Physiology, Tampere University Hospital, Tampere 33521, Finland; Department of Clinical Physiology, Finnish Cardiovascular Research Center - Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere 33014, Finland
| | - Yoichiro Kamatani
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan; Laboratory of Complex Trait Genomics, Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 108-8639, Japan
| | - Masahiro Kanai
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan; Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Savita Karthikeyan
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
| | - Fotis Koskeridis
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina 45110, Greece
| | - Leslie A Lange
- Department of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Terho Lehtimäki
- Department of Clinical Chemistry, Fimlab Laboratories, Tampere 33520, Finland; Department of Clinical Chemistry, Finnish Cardiovascular Research Center - Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere 33014, Finland
| | - Markus M Lerch
- Department of Internal Medicine, University Medicine Greifswald, Greifswald 17475, Germany
| | - Allan Linneberg
- Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, Frederiksberg 2000, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Yongmei Liu
- Duke Molecular Physiology Institute, Department of Medicine, Division of Cardiology, Duke University Medical Center, Durham, NC 27701, USA
| | - Leo-Pekka Lyytikäinen
- Department of Clinical Chemistry, Fimlab Laboratories, Tampere 33520, Finland; Department of Clinical Chemistry, Finnish Cardiovascular Research Center - Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere 33014, Finland
| | - Ani Manichaikul
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22903, USA
| | - Hilary C Martin
- Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK
| | - Koichi Matsuda
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 108-8639, Japan
| | - Karen L Mohlke
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Nina Mononen
- Department of Clinical Chemistry, Fimlab Laboratories, Tampere 33520, Finland; Department of Clinical Chemistry, Finnish Cardiovascular Research Center - Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere 33014, Finland
| | - Yoshinori Murakami
- Division of Molecular Pathology, The Institute of Medical Sciences, The University of Tokyo, Tokyo 108-8639, Japan
| | - Girish N Nadkarni
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Matthias Nauck
- German Center for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald 17475, Germany; Institue of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald 17475, Germany
| | - Kjell Nikus
- Department of Cardiology, Heart Center, Tampere University Hospital, Tampere 33521, Finland; Department of Cardiology, Finnish Cardiovascular Research Center - Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere 33014, Finland
| | - Willem H Ouwehand
- Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK; British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK; Department of Hematology, University of Cambridge, Cambridge CB2 0PT, UK; National Health Service (NHS) Blood and Transplant, Cambridge Biomedical Campus, Cambridge CB2 0PT, UK
| | - Nathan Pankratz
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Oluf Pedersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Michael Preuss
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Bruce M Psaty
- Department of Medicine, University of Washington, Seattle, WA 98101, USA; Department of Epidemiology, University of Washington, Seattle, WA 98101, USA; Department of Health Services, University of Washington, Seattle, WA 98101, USA; Kaiser Permanente Washington Health Research Institute, Seattle, WA 98101, USA
| | - Olli T Raitakari
- Centre for Population Health Research, University of Turku and Turku University Hospital, Turku 20521, Finland; Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku 20521, Finland; Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku 20521, Finland
| | - David J Roberts
- The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK; Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK; Department of Haematology, Churchill Hospital, Oxford OX3 7LE, UK; NHS Blood and Transplant - Oxford Centre, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Stephen S Rich
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22903, USA
| | - Benjamin A T Rodriguez
- The Framingham Heart Study, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA; Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA
| | - Jonathan D Rosen
- Department of Biostatistics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Jerome I Rotter
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation (formerly Los Angeles Biomedical Research Institute) at Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - Petra Schubert
- Massachusetts Veterans Epidemiology Research and Information Center (MAVERIC), VA Boston Healthcare System, Boston, MA 02130, USA
| | - Cassandra N Spracklen
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA; Department of Biostatistics and Epidemiology, University of Massachusetts, Amherst, MA 01002, USA
| | - Praveen Surendran
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; Rutherford Fund Fellow, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
| | - Hua Tang
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jean-Claude Tardif
- Montreal Heart Institute, Montreal, QC H1T 1C8, Canada; Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Richard C Trembath
- School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King's College London, London SE1 1UL, UK
| | - Mohsen Ghanbari
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam 3015, the Netherlands; Department of Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad 9177948564, Iran
| | - Uwe Völker
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald 17475, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald 17475, Germany
| | - Henry Völzke
- German Center for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald 17475, Germany; Institute for Community Medicine, University Medicine Greifswald, Greifswald 17475, Germany
| | - Nicholas A Watkins
- National Health Service (NHS) Blood and Transplant, Cambridge Biomedical Campus, Cambridge CB2 0PT, UK
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Science, National Institute on Aging/NIH, Baltimore, MD 21224, USA
| | | | - Yun Li
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA; Department of Biostatistics, University of North Carolina, Chapel Hill, NC 27599, USA; Department of Computer Science, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Adam S Butterworth
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK; The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK; Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge CB10 1SA, UK
| | - Jean-François Gauchat
- Département de Pharmacologie et Physiologie, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Charleston W K Chiang
- Center for Genetic Epidemiology, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA; Quantitative and Computational Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Bingshan Li
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232, USA
| | - Ruth J F Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - William J Astle
- MRC Biostatistics Unit, University of Cambridge, Cambridge CB2 0SR, UK; The National Institute for Health Research Blood and Transplant Unit (NIHR BTRU) in Donor Health and Genomics, University of Cambridge, Cambridge CB2 0QQ, UK; NIHR Blood and Transplant Research Unit in Donor Health and Genomics, Strangeways Laboratory, Cambridge CB1 8RN, UK
| | - Evangelos Evangelou
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina 45110, Greece; Department of Epidemiology and Biostatistics, Imperial College London, London W2 1PG, UK
| | - David A van Heel
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Vijay G Sankaran
- Division of Hematology/Oncology, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02446, USA
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan; Laboratory of Statistical Immunology, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
| | - Nicole Soranzo
- Human Genetics, Wellcome Sanger Institute, Hinxton CB10 1SA, UK; Department of Hematology, University of Cambridge, Cambridge CB2 0PT, UK
| | - Andrew D Johnson
- The Framingham Heart Study, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA; Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Framingham, MA 01702, USA
| | - Alexander P Reiner
- Department of Epidemiology, University of Washington, Seattle, WA 98109, USA
| | - Paul L Auer
- Zilber School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA.
| | - Guillaume Lettre
- Montreal Heart Institute, Montreal, QC H1T 1C8, Canada; Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
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Dellazizzo L, Potvin S, Dou BY, Beaudoin M, Luigi M, Giguère CÉ, Dumais A. Association Between the Use of Cannabis and Physical Violence in Youths: A Meta-Analytical Investigation. Am J Psychiatry 2020; 177:619-626. [PMID: 32456503 DOI: 10.1176/appi.ajp.2020.19101008] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this meta-analysis was to investigate the extent to which cannabis use among youths is associated with the risk of perpetrating physical violence. METHODS Searches were conducted in PubMed, PsycINFO, Web of Science, and Google Scholar for articles published from the inception of each database to July 2019. All studies that examined both cannabis use and the perpetration of physical violence in a sample of youths and young adults <30 years old were included. The meta-analysis was performed with a random-effects model. Risk of publication bias was assessed with Egger's test. Guidelines from the Meta-Analysis of Observational Studies in Epidemiology were followed. RESULTS After screening 11,348 potential studies, 30 study arms were included, yielding a total of 296,815 adolescents and young adults. The odds ratio for the pooled studies was 2.11 (95% CI=1.64, 2.72). The pooled odds ratios were 2.15 (95% CI=1.58, 2.94) and 2.02 (95% CI=1.26, 3.23) for the cross-sectional and longitudinal studies, respectively. Preliminary evidence suggests that the risk of violence was higher for persistent heavy users (odds ratio=2.81, 95% CI=1.68, 4.74) compared with past-year users (odds ratio=2.05, 95% CI=1.5, 2.8) and lifetime users (odds ratio=1.94, 95% CI=1.29, 2.93). The odds ratio for unadjusted studies was 2.62 (95% CI=1.89, 3.62), and for studies using odds ratios adjusted for potential confounding factors, 2.01 (95% CI=1.57, 2.56). CONCLUSIONS These results demonstrate a moderate association between cannabis use and physical violence, which remained significant regardless of study design and adjustment for confounding factors (i.e., socioeconomic factors, other substance use). Cannabis use in this population is a risk factor for violence.
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Affiliation(s)
- Laura Dellazizzo
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Stéphane Potvin
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Bo Yi Dou
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Mélissa Beaudoin
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Mimosa Luigi
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Charles-Édouard Giguère
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
| | - Alexandre Dumais
- Research Center, Montreal University Institute of Mental Health, Montreal (Dellazizzo, Potvin, Dou, Beaudoin, Luigi, Giguère, Dumais); Department of Psychiatry and Addictology, Faculty of Medicine, University of Montreal (Dellazizzo, Potvin, Beaudoin, Luigi, Dumais); Faculty of Medicine, University of Montreal (Dou [medical student]); and Philippe-Pinel National Institute of Legal Psychiatry, Montreal (Dumais)
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Mury P, Wünnemann F, Beaudoin M, Thorin-Trescases N, Hébert Y, Pellerin M, Carrier M, Perrault L, Lettre G, Thorin E. Single Endothelial Cell mRNA Sequencing Better Captures the Severity of Coronary Artery Disease Than Targeted Total Arterial Markers of Inflammation and Senescence. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.09446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Yves Hébert
- Montreal Heart Institute
- Université de Montréal
| | | | | | | | | | - Eric Thorin
- Montreal Heart Institute
- Université de Montréal
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17
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Lalonde S, Codina-Fauteux VA, de Bellefon SM, Leblanc F, Beaudoin M, Simon MM, Dali R, Kwan T, Lo KS, Pastinen T, Lettre G. Integrative analysis of vascular endothelial cell genomic features identifies AIDA as a coronary artery disease candidate gene. Genome Biol 2019; 20:133. [PMID: 31287004 PMCID: PMC6613242 DOI: 10.1186/s13059-019-1749-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/27/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Genome-wide association studies (GWAS) have identified hundreds of loci associated with coronary artery disease (CAD) and blood pressure (BP) or hypertension. Many of these loci are not linked to traditional risk factors, nor do they include obvious candidate genes, complicating their functional characterization. We hypothesize that many GWAS loci associated with vascular diseases modulate endothelial functions. Endothelial cells play critical roles in regulating vascular homeostasis, such as roles in forming a selective barrier, inflammation, hemostasis, and vascular tone, and endothelial dysfunction is a hallmark of atherosclerosis and hypertension. To test this hypothesis, we generate an integrated map of gene expression, open chromatin region, and 3D interactions in resting and TNFα-treated human endothelial cells. RESULTS We show that genetic variants associated with CAD and BP are enriched in open chromatin regions identified in endothelial cells. We identify physical loops by Hi-C and link open chromatin peaks that include CAD or BP SNPs with the promoters of genes expressed in endothelial cells. This analysis highlights 991 combinations of open chromatin regions and gene promoters that map to 38 CAD and 92 BP GWAS loci. We validate one CAD locus, by engineering a deletion of the TNFα-sensitive regulatory element using CRISPR/Cas9 and measure the effect on the expression of the novel CAD candidate gene AIDA. CONCLUSIONS Our data support an important role played by genetic variants acting in the vascular endothelium to modulate inter-individual risk in CAD and hypertension.
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Affiliation(s)
- Simon Lalonde
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
| | - Valérie-Anne Codina-Fauteux
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4 Canada
| | - Sébastian Méric de Bellefon
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4 Canada
| | - Francis Leblanc
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4 Canada
| | - Mélissa Beaudoin
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
| | - Marie-Michelle Simon
- McGill University and Genome Québec Innovation Center, Montréal, Québec H3A 0G1 Canada
| | - Rola Dali
- McGill University and Genome Québec Innovation Center, Montréal, Québec H3A 0G1 Canada
| | - Tony Kwan
- McGill University and Genome Québec Innovation Center, Montréal, Québec H3A 0G1 Canada
| | - Ken Sin Lo
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
| | - Tomi Pastinen
- Center for Pediatric Genomic Medicine (CPGM), Children’s Mercy Kansas City, 2401 Gillham Road, Kansas City, MO 64108 USA
| | - Guillaume Lettre
- Montreal Heart Institute, 5000 Belanger street, Montréal, Québec H1T 1C8 Canada
- Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4 Canada
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18
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Beaudoin M, Potvin S, Dellazizzo L, Luigi M, Giguère CE, Dumais A. Trajectories of Dynamic Risk Factors as Predictors of Violence and Criminality in Patients Discharged From Mental Health Services: A Longitudinal Study Using Growth Mixture Modeling. Front Psychiatry 2019; 10:301. [PMID: 31139099 PMCID: PMC6520437 DOI: 10.3389/fpsyt.2019.00301] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/17/2019] [Indexed: 11/25/2022] Open
Abstract
Background: Individuals with severe mental illnesses are at greater risk of offenses and violence, though the relationship remains unclear due to the interplay of static and dynamic risk factors. Static factors have generally been emphasized, leaving little room for temporal changes in risk. Hence, this longitudinal study aims to identify subgroups of psychiatric populations at risk of violence and criminality by taking into account the dynamic changes of symptomatology and substance use. Method: A total of 825 patients from the MacArthur Violence Risk Assessment Study having completed five postdischarge follow-ups were analyzed. Individuals were classified into outcome trajectories (violence and criminality). Trajectories were computed for each substance (cannabis, alcohol, and cocaine, alone or combined) and for symptomatology and inputted as dynamic factors, along with other demographic and psychiatric static factors, into binary logistic regressions for predicting violence and criminality. Best predictors were then identified using backward elimination, and receiver operator characteristic (ROC) curves were calculated for both models. Results: Two trajectories were found for violence (low versus high violence). Best predictors for belonging in the high-violence group were low verbal intelligence (baseline), higher psychopathy (baseline) and anger (mean) scores, persistent cannabis use (alone), and persistent moderate affective symptoms. The model's area under the curve (AUC) was 0.773. Two trajectories were also chosen as being optimal for criminality. The final model to predict high criminality yielded an AUC of 0.788, retaining as predictors male sex, lower educational level, higher score of psychopathy (baseline), persistent polysubstance use (cannabis, cocaine, and alcohol), and persistent cannabis use (alone). Both models were moderately predictive of outcomes. Conclusion: Static factors identified as predictors are consistent with previously published literature. Concerning dynamic factors, unexpectedly, cannabis alone was an independent co-occurring variable, as well as affective symptoms, in the violence model. For criminality, our results are novel, as there are very few studies on criminal behaviors in nonforensic psychiatric populations. In conclusion, these results emphasize the need to further study the predictors of crime, separately from violence and the impact of longitudinal patterns of specific substance use and high affective symptoms.
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Affiliation(s)
- Mélissa Beaudoin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Stéphane Potvin
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Laura Dellazizzo
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Mimosa Luigi
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Charles-Edouard Giguère
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
| | - Alexandre Dumais
- Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada
- Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
- Institut national de psychiatrie légale Philippe-Pinel, Montreal, QC, Canada
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19
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Dellazizzo L, Potvin S, Beaudoin M, Luigi M, Dou BY, Giguère CÉ, Dumais A. Cannabis use and violence in patients with severe mental illnesses: A meta-analytical investigation. Psychiatry Res 2019; 274:42-48. [PMID: 30780061 DOI: 10.1016/j.psychres.2019.02.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/05/2019] [Accepted: 02/05/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Laura Dellazizzo
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, Canada; Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada
| | - Stéphane Potvin
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, Canada
| | - Mélissa Beaudoin
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, Canada; Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada
| | - Mimosa Luigi
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, Canada; Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada
| | - Bo Yi Dou
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
| | - Charles-Édouard Giguère
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada
| | - Alexandre Dumais
- Centre de recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, Canada; Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, Canada; Institut national de psychiatrie légale Philippe-Pinel, Montreal, Canada.
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20
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Lessard S, Beaudoin M, Orkin SH, Bauer DE, Lettre G. 14q32 and let-7 microRNAs regulate transcriptional networks in fetal and adult human erythroblasts. Hum Mol Genet 2019; 27:1411-1420. [PMID: 29432581 DOI: 10.1093/hmg/ddy051] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/05/2018] [Indexed: 12/29/2022] Open
Abstract
In humans, fetal erythropoiesis takes place in the liver whereas adult erythropoiesis occurs in the bone marrow. Fetal and adult erythroid cells are not only produced at different sites, but are also distinguished by their respective transcriptional program. In particular, whereas fetal erythroid cells express γ-globin chains to produce fetal hemoglobin (HbF), adult cells express β-globin chains to generate adult hemoglobin. Understanding the transcriptional regulation of the fetal-to-adult hemoglobin switch is clinically important as re-activation of HbF production in adult erythroid cells would represent a promising therapy for the hemoglobin disorders sickle cell disease and β-thalassemia. We used RNA-sequencing to measure global gene and microRNA (miRNA) expression in human erythroblasts derived ex vivo from fetal liver (n = 12 donors) and bone marrow (n = 12 donors) hematopoietic stem/progenitor cells. We identified 7829 transcripts and 402 miRNA that were differentially expressed (false discovery rate <5%). The miRNA expression patterns were replicated in an independent collection of human erythroblasts using a different technology. By combining gene and miRNA expression data, we developed transcriptional networks which show substantial differences between fetal and adult human erythroblasts. Our analyses highlighted the miRNAs at the imprinted 14q32 locus in fetal erythroblasts and the let-7 miRNA family in adult erythroblasts as key regulators of stage-specific erythroid transcriptional programs. Altogether, our results provide a comprehensive resource to prioritize genes that may modify clinical severity in red blood cell (RBC) disorders, or genes that might be implicated in erythropoiesis by genome-wide association studies of RBC traits.
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Affiliation(s)
- Samuel Lessard
- Montreal Heart Institute, Montréal, QC H1T 1C8, Canada.,Faculté de Médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | | | - Stuart H Orkin
- Division of Hematology/Oncology, Boston Children's Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.,Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Daniel E Bauer
- Division of Hematology/Oncology, Boston Children's Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Guillaume Lettre
- Montreal Heart Institute, Montréal, QC H1T 1C8, Canada.,Faculté de Médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada
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21
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Beaudoin M, Best K, Routhier F, Atack L, Hitzig S, Kairy D. Usability of the participation and quality of life (PAR-QoL) outcomes tool-kit website for spinal cord injury. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Codina-Fauteux VA, Beaudoin M, Lalonde S, Lo KS, Lettre G. PHACTR1 splicing isoforms and eQTLs in atherosclerosis-relevant human cells. BMC Med Genet 2018; 19:97. [PMID: 29884117 PMCID: PMC5994109 DOI: 10.1186/s12881-018-0616-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 05/23/2018] [Indexed: 11/20/2022]
Abstract
Background Genome-wide association studies (GWAS) have identified a variant (rs9349379) at the phosphatase and actin regulator 1 (PHACTR1) locus that is associated with coronary artery disease (CAD). The same variant is also an expression quantitative trait locus (eQTL) for PHACTR1 in human coronary arteries (hCA). Here, we sought to characterize PHACTR1 splicing pattern in atherosclerosis-relevant human cells. We also explored how rs9349379 modulates the expression of the different PHACTR1 splicing isoforms. Methods We combined rapid amplification of cDNA ends (RACE) with next-generation long-read DNA sequencing to discover all PHACTR1 transcripts in many human tissues and cell types. We measured PHACTR1 transcripts by qPCR to identify transcript-specific eQTLs. Results We confirmed a brain-specific long transcript, a short transcript expressed in monocytes and four intermediate transcripts that are different due to alternative splicing of two in-frame exons. In contrast to a previous report, we confirmed that the PHACTR1 protein is present in vascular smooth muscle cells. In 158 hCA from our collection and the GTEx dataset, rs9349379 was only associated with the expression levels of the intermediate PHACTR1 transcripts. Conclusions Our comprehensive transcriptomic profiling of PHACTR1 indicates that this gene encodes six main transcripts. Five of them are expressed in hCA, where atherosclerotic plaques develop. In this tissue, genotypes at rs9349379 are associated with the expression of the intermediate transcripts, but not the immune-specific short transcript. This result suggests that rs9349379 may in part influence CAD by modulating the expression of intermediate PHACTR1 transcripts in endothelial or vascular smooth muscle cells found in hCA. Electronic supplementary material The online version of this article (10.1186/s12881-018-0616-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Valérie-Anne Codina-Fauteux
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada.,Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec, H3T 1J4, Canada
| | - Mélissa Beaudoin
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Simon Lalonde
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Ken Sin Lo
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Guillaume Lettre
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada. .,Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec, H3T 1J4, Canada.
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Beaudoin M, Potvin S, Dellazizzo L, Surprenant M, Lesage A, Vanasse A, Ngamini-Ngui A, Dumais A. [Characterization of First Episodes of Schizophrenia from Combined Administrative Databases]. Sante Ment Que 2018; 43:83-105. [PMID: 32338687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Schizophrenia (SCZ) is a severe chronic disease associated with significant functional impairments. Prior to a diagnosis of SCZ, some nonspecific symptoms may occur (i.e., anxiety, insomnia, depressive symptoms) and may progress into psychosis. While these may be attenuated or not of sufficient severity for psychosis, many will seek help for these symptoms. Understanding the predictors of SCZ remains a considerable challenge for clinicians. Thus, several studies have been conducted to explain the different premorbid trajectories of psychosis. Though, no consensus has been established on the prediagnostic characteristics of patients with SCZ and remains a matter of debate, especially for women and older patients. Hence, our study aims to clarify the psychiatric characteristics of patients from Quebec preceding their first episode of SCZ and address the influence of age and sex. To do so, we used administrative databases from the RAMQ (Physician billings) and MED-ÉCHO (hospital registry in Quebec) between January 1996 and December 2006; 98% of about 7.5 millions of inhabitants are registered with the universal health plan. It recorded 24,883 men and women over the age of 18 diagnosed with a first episode of SCZ between the years 2004 and 2007. Different psychiatric antecedents by groups of age and sex are reported by cumulative frequency. The sample comprised of 53% men. Approximately, 50% and 36% were diagnosed with SCZ by psychiatrists and family physicians respectively. Patients aged from 30 to 54 represented most of the sample; over half of men and women were first diagnosed after 30 years old. Those with no antecedents accounted for 65% of the sample, while overall 35% had at least one ICD-9 diagnosis, specifically and in descending order manic depressive psychosis, depressive disorder, and drug use disorder. In women under 30, anxiety, depressive disorder and adjustment disorder were more frequent. Whereas amongst men under 30, substance use disorder was the most common antecedent, followed by anxiety. Considering the total population coverage, these findings are interesting as they draw a representative global portrait of the population with SCZ before their diagnosis according to their age group and sex. This project recalls the importance of examining the first psychotic episodes to possibly intervene early in the course of the disease by addressing depressive disorders, anxiety disorders and substance use.
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Affiliation(s)
- Mélissa Beaudoin
- Département de psychiatrie et d'addictologie de l'Université de Montréal ; Centre de recherche de l'Institut universitaire en santé mentale de Montréal
| | - Stéphane Potvin
- Département de psychiatrie et d'addictologie de l'Université de Montréal ; Centre de recherche de l'Institut universitaire en santé mentale de Montréal
| | - Laura Dellazizzo
- Département de psychiatrie et d'addictologie de l'Université de Montréal ; Centre de recherche de l'Institut universitaire en santé mentale de Montréal ; Institut Philippe-Pinel de Montréal
| | - Maëlle Surprenant
- Département de psychiatrie et d'addictologie de l'Université de Montréal
| | - Alain Lesage
- Département de psychiatrie et d'addictologie de l'Université de Montréal ; Centre de recherche de l'Institut universitaire en santé mentale de Montréal ; Institut national de santé publique du Québec
| | - Alain Vanasse
- Département de médecine de famille et de médecine d'urgence de l'Université de Sherbrooke ; Centre de recherche du Centre hospitalier universitaire de Sherbrooke
| | | | - Alexandre Dumais
- Département de psychiatrie et d'addictologie de l'Université de Montréal ; Centre de recherche de l'Institut universitaire en santé mentale de Montréal ; Institut Philippe-Pinel de Montréal
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Lessard S, Gatof ES, Beaudoin M, Schupp PG, Sher F, Ali A, Prehar S, Kurita R, Nakamura Y, Baena E, Ledoux J, Oceandy D, Bauer DE, Lettre G. An erythroid-specific ATP2B4 enhancer mediates red blood cell hydration and malaria susceptibility. J Clin Invest 2017; 127:3065-3074. [PMID: 28714864 PMCID: PMC5531409 DOI: 10.1172/jci94378] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 06/01/2017] [Indexed: 12/12/2022] Open
Abstract
The lack of mechanistic explanations for many genotype-phenotype associations identified by GWAS precludes thorough assessment of their impact on human health. Here, we conducted an expression quantitative trait locus (eQTL) mapping analysis in erythroblasts and found erythroid-specific eQTLs for ATP2B4, the main calcium ATPase of red blood cells (rbc). The same SNPs were previously associated with mean corpuscular hemoglobin concentration (MCHC) and susceptibility to severe malaria infection. We showed that Atp2b4-/- mice demonstrate increased MCHC, confirming ATP2B4 as the causal gene at this GWAS locus. Using CRISPR-Cas9, we fine mapped the genetic signal to an erythroid-specific enhancer of ATP2B4. Erythroid cells with a deletion of the ATP2B4 enhancer had abnormally high intracellular calcium levels. These results illustrate the power of combined transcriptomic, epigenomic, and genome-editing approaches in characterizing noncoding regulatory elements in phenotype-relevant cells. Our study supports ATP2B4 as a potential target for modulating rbc hydration in erythroid disorders and malaria infection.
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Affiliation(s)
- Samuel Lessard
- Montreal Heart Institute and Université de Montréal, Montréal, Québec, Canada
| | - Emily Stern Gatof
- Division of Hematology/Oncology, Boston Children’s Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
- Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Mélissa Beaudoin
- Montreal Heart Institute and Université de Montréal, Montréal, Québec, Canada
| | - Patrick G. Schupp
- Division of Hematology/Oncology, Boston Children’s Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - Falak Sher
- Division of Hematology/Oncology, Boston Children’s Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - Adnan Ali
- Cancer Research UK Manchester Institute, and
| | - Sukhpal Prehar
- Division of Cardiovascular Sciences, The University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Ryo Kurita
- Cell Engineering Division, RIKEN BioResource Center, Tsukuba, Ibaraki, Japan
| | - Yukio Nakamura
- Cell Engineering Division, RIKEN BioResource Center, Tsukuba, Ibaraki, Japan
- Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | | | - Jonathan Ledoux
- Montreal Heart Institute and Université de Montréal, Montréal, Québec, Canada
| | - Delvac Oceandy
- Division of Cardiovascular Sciences, The University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Daniel E. Bauer
- Division of Hematology/Oncology, Boston Children’s Hospital, Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Stem Cell Institute, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
| | - Guillaume Lettre
- Montreal Heart Institute and Université de Montréal, Montréal, Québec, Canada
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Lalonde S, Stone OA, Lessard S, Lavertu A, Desjardins J, Beaudoin M, Rivas M, Stainier DYR, Lettre G. Frameshift indels introduced by genome editing can lead to in-frame exon skipping. PLoS One 2017; 12:e0178700. [PMID: 28570605 PMCID: PMC5453576 DOI: 10.1371/journal.pone.0178700] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 05/17/2017] [Indexed: 12/31/2022] Open
Abstract
The introduction of frameshift indels by genome editing has emerged as a powerful technique to study the functions of uncharacterized genes in cell lines and model organisms. Such mutations should lead to mRNA degradation owing to nonsense-mediated mRNA decay or the production of severely truncated proteins. Here, we show that frameshift indels engineered by genome editing can also lead to skipping of “multiple of three nucleotides” exons. Such splicing events result in in-frame mRNA that may encode fully or partially functional proteins. We also characterize a segregating nonsense variant (rs2273865) located in a “multiple of three nucleotides” exon of LGALS8 that increases exon skipping in human erythroblast samples. Our results highlight the potentially frequent contribution of exonic splicing regulatory elements and are important for the interpretation of negative results in genome editing experiments. Moreover, they may contribute to a better annotation of loss-of-function mutations in the human genome.
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Affiliation(s)
| | - Oliver A. Stone
- Department of Biochemistry & Biophysics, UCSF, San Francisco, California, United States of America
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Samuel Lessard
- Montreal Heart Institute, Montreal, Quebec, Canada
- Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Adam Lavertu
- Department of Biomedical Data Science, Stanford University, Stanford, California, United States of America
| | | | | | - Manuel Rivas
- Department of Biomedical Data Science, Stanford University, Stanford, California, United States of America
| | - Didier Y. R. Stainier
- Department of Biochemistry & Biophysics, UCSF, San Francisco, California, United States of America
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Guillaume Lettre
- Montreal Heart Institute, Montreal, Quebec, Canada
- Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
- * E-mail:
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26
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Ilboudo Y, Bartolucci P, Rivera A, Sedzro JC, Beaudoin M, Trudel M, Alper SL, Brugnara C, Galactéros F, Lettre G. Genome-wide association study of erythrocyte density in sickle cell disease patients. Blood Cells Mol Dis 2017; 65:60-65. [PMID: 28552477 DOI: 10.1016/j.bcmd.2017.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/10/2017] [Accepted: 05/10/2017] [Indexed: 12/14/2022]
Abstract
Deoxy-hemoglobin S polymerization into rigid fibers is the direct cause of the clinical sequelae observed in sickle cell disease (SCD). The rate of polymerization of sickle hemoglobin is determined primarily by intracellular hemoglobin concentration, itself dependent on the amount of sickle hemoglobin and on red blood cell (RBC) volume. Dense, dehydrated RBC (DRBC) are observed in SCD patients, and their number correlates with hemolytic parameters and complications such as renal dysfunction, leg ulcers and priapism. To identify new genes involved in RBC hydration in SCD, we performed the first genome-wide association study for DRBC in 374 sickle cell anemia (HbSS) patients. We did not find genome-wide significant results, indicating that variants that modulate DRBC have modest-to-weak effects. A secondary analysis demonstrated a nominal association (P=0.003) between DRBC in SCD patients and a variant associated with mean corpuscular hemoglobin concentration (MCHC) in non-anemic individuals. This intronic variant controls the expression of ATP2B4, the main calcium pump in erythrocytes. Our study highlights ATP2B4 as a promising target for modulation of RBC hydration in SCD patients.
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Affiliation(s)
- Yann Ilboudo
- Faculty of Medicine, Program in Bioinformatics, Université de Montréal, Montreal, Quebec, Canada; Montreal Heart Institute, Montreal, Quebec, Canada
| | - Pablo Bartolucci
- Red Cell Genetic Disease Unit, Hôpital Henri-Mondor, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Est, IMRB - U955 - Equipe no 2, Créteil, France
| | - Alicia Rivera
- Division of Nephrology and Vascular Biology Research Center, Beth Israel Deaconess Medical Center, Boston, USA; Department of Medicine, Harvard Medical School, Boston, USA
| | | | | | - Marie Trudel
- Faculty of Medicine, Department of Medicine and Department of Biochemistry, Université de Montréal, Montreal, Quebec, Canada; Institut de recherches cliniques de Montréal, Montréal, Québec, Canada
| | - Seth L Alper
- Division of Nephrology and Vascular Biology Research Center, Beth Israel Deaconess Medical Center, Boston, USA; Department of Medicine, Harvard Medical School, Boston, USA
| | - Carlo Brugnara
- Department of Laboratory Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Frédéric Galactéros
- Red Cell Genetic Disease Unit, Hôpital Henri-Mondor, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Est, IMRB - U955 - Equipe no 2, Créteil, France
| | - Guillaume Lettre
- Faculty of Medicine, Program in Bioinformatics, Université de Montréal, Montreal, Quebec, Canada; Montreal Heart Institute, Montreal, Quebec, Canada.
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28
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Beaudoin M, Routhier F, Lettre J, Archambault P, Lemay M. Effects and impacts of a robotic arm used by individuals with upper limb motor impairment: A scoping review. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Beaudoin M, Gupta RM, Won HH, Lo KS, Do R, Henderson CA, Lavoie-St-Amour C, Langlois S, Rivas D, Lehoux S, Kathiresan S, Tardif JC, Musunuru K, Lettre G. Myocardial Infarction-Associated SNP at 6p24 Interferes With MEF2 Binding and Associates With PHACTR1 Expression Levels in Human Coronary Arteries. Arterioscler Thromb Vasc Biol 2015; 35:1472-1479. [PMID: 25838425 DOI: 10.1161/atvbaha.115.305534] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/18/2015] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Coronary artery disease (CAD), including myocardial infarction (MI), is the main cause of death in the world. Genome-wide association studies have identified dozens of single nucleotide polymorphisms (SNPs) associated with CAD/MI. One of the most robust CAD/MI genetic associations is with intronic SNPs in the gene PHACTR1 on chromosome 6p24. How these PHACTR1 SNPs influence CAD/MI risk, and whether PHACTR1 itself is the causal gene at the locus, is currently unknown. APPROACH AND RESULTS Using genetic fine-mapping and DNA resequencing experiments, we prioritized an intronic SNP (rs9349379) in PHACTR1 as causal variant. We showed that this variant is an expression quantitative trait locus for PHACTR1 expression in human coronary arteries. Experiments in endothelial cell extracts confirmed that alleles at rs9349379 are differentially bound by the transcription factors myocyte enhancer factor-2. We engineered a deletion of this myocyte enhancer factor-2-binding site using CRISPR/Cas9 genome-editing methodology. Heterozygous endothelial cells carrying this deletion express 35% less PHACTR1. Finally, we found no evidence that PHACTR1 expression levels are induced when stimulating human endothelial cells with vascular endothelial growth factor, tumor necrosis factor-α, or shear stress. CONCLUSIONS Our results establish a link between intronic SNPs in PHACTR1, myocyte enhancer factor-2 binding, and transcriptional functions at the locus, PHACTR1 expression levels in coronary arteries and CAD/MI risk. Because PHACTR1 SNPs are not associated with the traditional risk factors for CAD/MI (eg, blood lipids or pressure, diabetes mellitus), our results suggest that PHACTR1 may influence CAD/MI risk through as yet unknown mechanisms in the vascular endothelium.
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Affiliation(s)
- Mélissa Beaudoin
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Rajat M Gupta
- Department of Stem Cell and Regenerative Biology, Harvard University, and Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA
| | - Hong-Hee Won
- Center of Human Genetic Research, Massachusetts General Hospital, Boston, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Ken Sin Lo
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Ron Do
- Center of Human Genetic Research, Massachusetts General Hospital, Boston, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Christopher A Henderson
- Department of Stem Cell and Regenerative Biology, Harvard University, and Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA
| | | | - Simon Langlois
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
| | - Daniel Rivas
- Lady Davis Institute for Medical Research, McGill University, 3755 Côte Sainte-Catherine, Montreal, Quebec, H3T 1E2, Canada
| | - Stephanie Lehoux
- Lady Davis Institute for Medical Research, McGill University, 3755 Côte Sainte-Catherine, Montreal, Quebec, H3T 1E2, Canada
| | - Sekar Kathiresan
- Center of Human Genetic Research, Massachusetts General Hospital, Boston, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Jean-Claude Tardif
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
- Department of Medicine, Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec, H3T 1J4, Canada
| | - Kiran Musunuru
- Department of Stem Cell and Regenerative Biology, Harvard University, and Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA
| | - Guillaume Lettre
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec, H1T 1C8, Canada
- Department of Medicine, Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec, H3T 1J4, Canada
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Lessard S, Beaudoin M, Benkirane K, Lettre G. Comparison of DNA methylation profiles in human fetal and adult red blood cell progenitors. Genome Med 2015; 7:1. [PMID: 25606059 PMCID: PMC4298057 DOI: 10.1186/s13073-014-0122-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 12/09/2014] [Indexed: 11/21/2022] Open
Abstract
Background DNA methylation is an epigenetic modification that plays an important role during mammalian development. Around birth in humans, the main site of red blood cell production moves from the fetal liver to the bone marrow. DNA methylation changes at the β-globin locus and a switch from fetal to adult hemoglobin production characterize this transition. Understanding this globin switch may improve the treatment of patients with sickle cell disease and β-thalassemia, two of the most common Mendelian diseases in the world. The goal of our study was to describe and compare the genome-wide patterns of DNA methylation in fetal and adult human erythroblasts. Methods We used the Illumina HumanMethylation 450 k BeadChip to measure DNA methylation at 402,819 CpGs in ex vivo-differentiated erythroblasts from 12 fetal liver and 12 bone marrow CD34+ donors. Results We identified 5,937 differentially methylated CpGs that overlap with erythroid enhancers and binding sites for erythropoiesis-related transcription factors. Combining this information with genome-wide association study results, we show that erythroid enhancers define particularly promising genomic regions to identify new genetic variants associated with fetal hemoglobin (HbF) levels in humans. Many differentially methylated CpGs are located near genes with unanticipated roles in red blood cell differentiation and proliferation. For some of these new candidate genes, we confirm the correlation between DNA methylation and gene expression levels in red blood cell progenitors. We also provide evidence that DNA methylation and genetic variation at the β-globin locus independently control globin gene expression in adult erythroblasts. Conclusions Our DNA methylome maps confirm the widespread dynamic changes in DNA methylation that occur during human erythropoiesis. These changes tend to happen near erythroid enhancers, further highlighting their importance in erythroid regulation and HbF production. Finally, DNA methylation may act independently of the transcription factor BCL11A to repress fetal hemoglobin production. This provides cues on strategies to more efficiently re-activate HbF production in sickle cell disease and β-thalassemia patients. Electronic supplementary material The online version of this article (doi:10.1186/s13073-014-0122-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Samuel Lessard
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec H1T 1C8 Canada ; Faculté de Médecine, Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec H3T 1J4 Canada
| | - Mélissa Beaudoin
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec H1T 1C8 Canada
| | - Karim Benkirane
- Hôpital Maisonneuve-Rosemont, 5415 Boul. de l'Assomption, Montréal, Québec H1T 2M4 Canada
| | - Guillaume Lettre
- Montreal Heart Institute, 5000 Bélanger Street, Montréal, Québec H1T 1C8 Canada ; Faculté de Médecine, Université de Montréal, 2900 Boul. Édouard-Montpetit, Montréal, Québec H3T 1J4 Canada
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Tadros R, Chami N, Beaudoin M, Lo K, Robb L, Lemarbre F, Talajic M, Lettre G. Novel Mutations in Familial Dilated Cardiomyopathy Identified by Whole Exome Sequencing. Can J Cardiol 2013. [DOI: 10.1016/j.cjca.2013.07.623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Beaudoin M, Goyette P, Boucher G, Lo KS, Rivas MA, Stevens C, Alikashani A, Ladouceur M, Ellinghaus D, Törkvist L, Goel G, Lagacé C, Annese V, Bitton A, Begun J, Brant SR, Bresso F, Cho JH, Duerr RH, Halfvarson J, McGovern DPB, Radford-Smith G, Schreiber S, Schumm PL, Sharma Y, Silverberg MS, Weersma RK, D'Amato M, Vermeire S, Franke A, Lettre G, Xavier RJ, Daly MJ, Rioux JD. Deep resequencing of GWAS loci identifies rare variants in CARD9, IL23R and RNF186 that are associated with ulcerative colitis. PLoS Genet 2013; 9:e1003723. [PMID: 24068945 PMCID: PMC3772057 DOI: 10.1371/journal.pgen.1003723] [Citation(s) in RCA: 153] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 07/01/2013] [Indexed: 02/06/2023] Open
Abstract
Genome-wide association studies and follow-up meta-analyses in Crohn's disease (CD) and ulcerative colitis (UC) have recently identified 163 disease-associated loci that meet genome-wide significance for these two inflammatory bowel diseases (IBD). These discoveries have already had a tremendous impact on our understanding of the genetic architecture of these diseases and have directed functional studies that have revealed some of the biological functions that are important to IBD (e.g. autophagy). Nonetheless, these loci can only explain a small proportion of disease variance (~14% in CD and 7.5% in UC), suggesting that not only are additional loci to be found but that the known loci may contain high effect rare risk variants that have gone undetected by GWAS. To test this, we have used a targeted sequencing approach in 200 UC cases and 150 healthy controls (HC), all of French Canadian descent, to study 55 genes in regions associated with UC. We performed follow-up genotyping of 42 rare non-synonymous variants in independent case-control cohorts (totaling 14,435 UC cases and 20,204 HC). Our results confirmed significant association to rare non-synonymous coding variants in both IL23R and CARD9, previously identified from sequencing of CD loci, as well as identified a novel association in RNF186. With the exception of CARD9 (OR = 0.39), the rare non-synonymous variants identified were of moderate effect (OR = 1.49 for RNF186 and OR = 0.79 for IL23R). RNF186 encodes a protein with a RING domain having predicted E3 ubiquitin-protein ligase activity and two transmembrane domains. Importantly, the disease-coding variant is located in the ubiquitin ligase domain. Finally, our results suggest that rare variants in genes identified by genome-wide association in UC are unlikely to contribute significantly to the overall variance for the disease. Rather, these are expected to help focus functional studies of the corresponding disease loci.
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Affiliation(s)
- Mélissa Beaudoin
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
| | - Philippe Goyette
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
| | | | - Ken Sin Lo
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
| | - Manuel A. Rivas
- Center for the Study of IBD (CSIBD) Genetics, The Broad Institute, Cambridge, Massachusetts, United States of America
| | - Christine Stevens
- Center for the Study of IBD (CSIBD) Genetics, The Broad Institute, Cambridge, Massachusetts, United States of America
| | | | - Martin Ladouceur
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
| | - David Ellinghaus
- Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany
| | - Leif Törkvist
- Department of Clinical Science Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Gautam Goel
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard School of Medicine, Boston, Massachusetts, United States of America
| | - Caroline Lagacé
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
| | - Vito Annese
- Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, San Giovanni Rotondo, Italy
- Azienda Ospedaliero Universitaria (AOU) Careggi, Unit of Gastroenterology SOD2, Florence, Italy
| | - Alain Bitton
- Division of Gastroenterology, McGill University Health Centre, Royal Victoria Hospital, Montréal, Québec, Canada
| | - Jakob Begun
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard School of Medicine, Boston, Massachusetts, United States of America
| | - Steve R. Brant
- Meyerhoff Inflammatory Bowel Diseases Center, Department of Medicine, Johns Hopkins University School of Medicine, and Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Francesca Bresso
- Department of Medicine of the Karolinska University Hospital, Solna, Sweden
| | - Judy H. Cho
- Departments of Medicine and Genetics, Yale University, New Haven, Connecticut, United States of America
| | - Richard H. Duerr
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, and Department of Human Genetics, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, Pennsylvania, United States of America
| | - Jonas Halfvarson
- Department of Internal Medicine, Division of Gastroenterology, Örebro University Hospital and School of Health and Medical Sciences, Örebro University, Örebro, Sweden
| | - Dermot P. B. McGovern
- Cedars-Sinai F.Widjaja Inflammatory Bowel and Immunobiology Research Institute, and Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Graham Radford-Smith
- Inflammatory Bowel Diseases, Genetic and Computational Biology, Queensland Institute of Medical Research, and Department of Gastroenterology, Royal Brisbane and Womens Hospital, and School of Medicine, University of Queensland, Brisbane, Australia
| | - Stefan Schreiber
- Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany
- Department for General Internal Medicine, Christian-Albrechts-University, Kiel, Germany
| | - Philip L. Schumm
- Department of Health Studies, University of Chicago, Chicago, Illinois, United States of America
| | - Yashoda Sharma
- Departments of Medicine and Genetics, Yale University, New Haven, Connecticut, United States of America
| | - Mark S. Silverberg
- Mount Sinai Hospital Inflammatory Bowel Disease Centre, University of Toronto, Toronto, Ontario, Canada
| | - Rinse K. Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Severine Vermeire
- Division of Gastroenterology, University Hospital Gasthuisberg, Leuven, Belgium
| | - Andre Franke
- Department for General Internal Medicine, Christian-Albrechts-University, Kiel, Germany
| | - Guillaume Lettre
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
- Université de Montréal, Faculté de Médecine, Montréal, Québec, Canada
| | - Ramnik J. Xavier
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard School of Medicine, Boston, Massachusetts, United States of America
- Broad Institute of MIT and Harvard University, Cambridge, Massachusetts, United States of America
| | - Mark J. Daly
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - John D. Rioux
- Montreal Heart Institute, Research Center, Montreal, Quebec, Canada
- Université de Montréal, Faculté de Médecine, Montréal, Québec, Canada
- * E-mail:
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Beaudoin M, Lo KS, N'Diaye A, Rivas MA, Dubé MP, Laplante N, Phillips MS, Rioux JD, Tardif JC, Lettre G. Pooled DNA resequencing of 68 myocardial infarction candidate genes in French canadians. ACTA ACUST UNITED AC 2012; 5:547-54. [PMID: 22923420 DOI: 10.1161/circgenetics.112.963165] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Familial history is a strong risk factor for coronary artery disease (CAD), especially for early-onset myocardial infarction (MI). Several genes and chromosomal regions have been implicated in the genetic cause of coronary artery disease/MI, mostly through the discovery of familial mutations implicated in hyper-/hypocholesterolemia by linkage studies and single nucleotide polymorphisms by genome-wide association studies. Except for a few examples (eg, PCSK9), the role of low-frequency genetic variation (minor allele frequency [MAF]) ≈0.1%-5% on MI/coronary artery disease predisposition has not been extensively investigated. METHODS AND RESULTS We selected 68 candidate genes and sequenced their exons (394 kb) in 500 early-onset MI cases and 500 matched controls, all of French-Canadian ancestry, using solution-based capture in pools of nonindexed DNA samples. In these regions, we identified 1852 single nucleotide variants (695 novel) and captured 85% of the variants with MAF≥1% found by the 1000 Genomes Project in Europe-ancestry individuals. Using gene-based association testing, we prioritized for follow-up 29 low-frequency variants in 8 genes and attempted to genotype them for replication in 1594 MI cases and 2988 controls from 2 French-Canadian panels. Our pilot association analysis of low-frequency variants in 68 candidate genes did not identify genes with large effect on MI risk in French Canadians. CONCLUSIONS We have optimized a strategy, applicable to all complex diseases and traits, to discover efficiently and cost-effectively DNA sequence variants in large populations. Resequencing endeavors to find low-frequency variants implicated in common human diseases are likely to require very large sample size.
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Affiliation(s)
- Mélissa Beaudoin
- Montreal Heart Institute, 5000 Rue Bélanger, Montreal, Québec, Canada
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Labbé C, Boucher G, Foisy S, Alikashani A, Nkwimi H, David G, Beaudoin M, Goyette P, Charron G, Xavier RJ, Rioux JD. Genome-wide expression profiling implicates a MAST3-regulated gene set in colonic mucosal inflammation of ulcerative colitis patients. Inflamm Bowel Dis 2012; 18:1072-80. [PMID: 21994190 PMCID: PMC3269563 DOI: 10.1002/ibd.21887] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 08/15/2011] [Indexed: 01/31/2023]
Abstract
BACKGROUND Crohn's disease (CD) and ulcerative colitis (UC) are inflammatory bowel diseases (IBDs) presumably caused by dysregulated immune responses to the gut microbiota. Genetic association studies have implicated dozens of chromosomal regions or loci in IBD susceptibility. The next challenge is to explain the individual role of each of these modest effect loci in the disease state. We have previously identified MAST3 as an IBD susceptibility gene through genetic fine-mapping of the 19p linkage region. Testing MAST3 in a reporter assay provided preliminary evidence that MAST3 modulates the activity of inflammation-related transcription factor nuclear factor kappa B. METHODS Here we characterized the function of MAST3 through an examination of the influence of the modulation of MAST3 expression on endogenous genome-wide expression patterns. More specifically, we looked at differential gene expression resulting from overexpression and knockdown of the MAST3 gene in epithelial and macrophage cell lines. From we highlight a group of genes whose expression is modulated by MAST3 and correlate their expression with NF-jB activity. Their expression was found to be enriched in inflamed mucosal tissue of UC patients, confirming the importance of these genes in IBD. RESULTS We highlight a group of genes whose expression is modulated by MAST3 and correlate their expression with NF-κB activity. Their expression was found to be enriched in inflamed mucosal tissue of UC patients, confirming the importance of these genes in IBD. These MAST3-regulated genes are central to mucosal immune responses. Among them are proinflammatory cytokines (e.g., CCL20, IL8), regulators of NF-κB (e.g., TNFAIP3, LY96, NFKBIA), genes involved in interferon-induced defense against pathogen invasion (e.g., IFIT1, ISG15), and genes involved in cell adhesion and/or migration (e.g., CD44, TMOD1). CONCLUSIONS Taken together, these results confirm MAST3 as a modulator of the inflammatory response through regulation of immune gene expression in the gut of IBD patients.
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Affiliation(s)
- Catherine Labbé
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada,Département de Médecine, Université de Montréal, Montréal, Qc, Canada
| | | | - Sylvain Foisy
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada
| | | | - Herbert Nkwimi
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada
| | - Geneviève David
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada,Département de Médecine, Université de Montréal, Montréal, Qc, Canada
| | | | | | - Guy Charron
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada
| | - Ramnik J. Xavier
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA,Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital, Boston, MA, USA
| | - John D. Rioux
- Institut de Cardiologie de Montréal, Montréal, Qc, Canada,Département de Médecine, Université de Montréal, Montréal, Qc, Canada
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Querido E, Gallardo F, Beaudoin M, Ménard C, Chartrand P. Stochastic and reversible aggregation of mRNA with expanded CUG-triplet repeats. J Cell Sci 2011; 124:1703-14. [PMID: 21511730 DOI: 10.1242/jcs.073270] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Transcripts containing expanded CNG repeats, which are found in several neuromuscular diseases, are not exported from the nucleus and aggregate as ribonuclear inclusions by an unknown mechanism. Using the MS2-GFP system, which tethers fluorescent proteins to a specific mRNA, we followed the dynamics of single CUG-repeat transcripts and RNA aggregation in living cells. Single transcripts with 145 CUG repeats from the dystrophia myotonica-protein kinase (DMPK) gene had reduced diffusion kinetics compared with transcripts containing only five CUG repeats. Fluorescence recovery after photobleaching (FRAP) experiments showed that CUG-repeat RNAs display a stochastic aggregation behaviour, because individual RNA foci formed at different rates and displayed different recoveries. Spontaneous clustering of CUG-repeat RNAs was also observed, confirming the stochastic aggregation revealed by FRAP. The splicing factor Mbnl1 colocalized with individual CUG-repeat transcripts and its aggregation with RNA foci displayed the same stochastic behaviour as CUG-repeat mRNAs. Moreover, depletion of Mbnl1 by RNAi resulted in decreased aggregation of CUG-repeat transcripts after FRAP, supporting a direct role for Mbnl1 in CUG-rich RNA foci formation. Our data reveal that nuclear CUG-repeat RNA aggregates are labile, constantly forming and disaggregating structures, and that the Mbnl1 splicing factor is directly involved in the aggregation process.
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Affiliation(s)
- Emmanuelle Querido
- Department of Biochemistry, Université de Montréal, 2900 Edouard-Montpetit, Montréal, QC H3C 3J7, Canada
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Beaudoin M, Johnson S, Devries A, Mohades-Kassai A, Tiedje T. Temperature Dependence of the Optical Absorption Edge in Indium Phosphide. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-421-367] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractOptical bandgap thermometry is a new method for measuring the temperature of semiconductor substrates. In this method, the temperature of the substrate is inferred from the wavelength of the onset of transparency of the substrate which is a measure of its bandgap. Common configurations of this technique are diffuse reflectance and transmittance. In order to calibrate these spectra to substrate temperature and to better understand the temperature dependence of the absorption edge, the transmittance spectra of semi-insulating InP:Fe and n-type InP:S substrates have been measured as a function of temperature in a tube. The width of the absorption edge (Urbach parameter) is found to increase linearly with temperature from 8.7 meV at room temperature to 15.7 meV at 595°C for semi-insulating InP:Fe while it remains independent of temperature at a value of about 21.5 meV for heavily doped (6.5×1018 cm−3) InP:S. For InP:Fe, the temperature dependent part of the width is smaller than predicted by the standard theory where the width of the edge is proportional to the phonon population. The values of the Urbach parameter for InP:Fe are higher than those of semi-insulating GaAs which is attributed to the higher ionicity of InP.
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Brown AM, Lo KS, Guelpa P, Beaudoin M, Rioux JD, Tardif JC, Phillips MS, Lettre G. Optimus Primer: A PCR enrichment primer design program for next-generation sequencing of human exonic regions. BMC Res Notes 2010; 3:185. [PMID: 20609249 PMCID: PMC2916007 DOI: 10.1186/1756-0500-3-185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Accepted: 07/07/2010] [Indexed: 11/11/2022] Open
Abstract
Background Polymerase chain reaction (PCR) remains a simple, flexible, and inexpensive method for enriching genomic regions of interest for next-generation sequencing. In order to utilize PCR in this context, a major challenge facing researchers is how to generate a very large number of functional PCR primers that will successfully generate useable amplicons. For instance, in an exon-only re-sequencing project targeting 100 genes, each with 10 exons, 1,000 pairs of primers are required. In fact, the reality is often more complex as each gene might have several isoforms and large exons need to be divided to maintain the desired amplicon size. With only a list of gene names, our program Optimus Primer (OP) automatically takes into account all these variables, and can generate primers with no need to provide genome coordinates. More importantly however, OP, unlike other primer design programs, uniquely utilizes Primer3 in an iterative manner that allows the user to progressively design up to four iterations of primer designs. Through a single interface, the user can specify up to four different design parameters with different stringencies, thus increasing the probability that a functional PCR primer pair will be designed for all regions of interest in a single pass of the pipeline. Findings To demonstrate the effectiveness of the program, we designed PCR primers against 77 genes located in loci associated with ulcerative colitis as part of a candidate gene re-sequencing experiment. We achieved an experimental success rate of 93% or 472 out of 508 amplicons spanning the exonic regions of the 77 genes. Moreover, by automatically passing amplicons that failed primer design through three additional iterations of design parameters, we achieved an additional 170 successful primer pairs or 34% more in a single pass of OP than by conventional methods. Conclusion With only a gene list and PCR parameters, a user can produce hundreds of PCR primer designs for regions of interest with a high probability of success in a very short amount of time. Optimus Primer is an essential tool for researchers who want to pursue PCR-based enrichment strategies for next-generation re-sequencing applications. The program can be accessed via website at http://op.pgx.ca.
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Beaudoin M, Agrigoroaei S, Desrichard O, Fournet N, Roulin JL. Validation of the French version of the Memory Self-Efficacy Questionnaire. European Review of Applied Psychology 2008. [DOI: 10.1016/j.erap.2007.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
Beta protein 1 (BP1), a human homeotic transcription factor, is expressed during hematopoeisis in the erythroid lineage. To determine the in vivo role of BP1 in erythropoiesis, we have undertaken two complementary approaches using enforced BP1 expression in both transgenic mice and embryonic stem (ES) cells. Despite repeated attempts, only one adult transgenic BP1 founder mouse among 121 mice was obtained. This mouse presumably survived due to transgene mosaicism because the transgene could not be transmitted. This mouse expressed BP1 and displayed splenomegaly, extramedullary erythropoiesis and severe amyloidosis A in the kidney, a phenotype compatible with thalassemia. Consistently, the presence of BP1 transgene in fetuses was associated with paleness and lethality. In ES cells, BP1 expression in primary differentiation appeared to antagonize adult β-globin expression. In secondary differentiation, BP1 expression reduced significantly β-globin gene expression in both primitive and definitive erythroid cells, whereas it impaired only the definitive erythroid cell differentiation. These studies showed that BP1 can negatively modulate adult β-globin gene expression and definitive erythroid cell differentiation, and suggest that BP1 could play a role in thalassemia.
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Affiliation(s)
| | | | - Patricia E. Berg
- Department of Biochemistry and Molecular Biology, The George Washington University Medical CenterWashington DC, USA
| | | | - Vivette D'Agati
- Department of Pathology, College of Physicians and Surgeons of Columbia UniversityNew York, NY, USA
| | - Marie Trudel
- To whom correspondence should be addressed. Tel: +1 514 987 5712; Fax: +1 514 987 5585;
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Daull P, Lepage R, Benrezzak O, Cayer J, Beaudoin M, Belleville K, Blouin A, Sirois P, Nantel F, Jeng AY, Battistini B. The first preclinical pharmacotoxicological safety assessment of CGS 35601, a triple vasopeptidase inhibitor, in chronically instrumented, conscious, and unrestrained spontaneously hypertensive rats. Drug Chem Toxicol 2006; 29:183-202. [PMID: 16707327 DOI: 10.1080/01480540600566717] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
CGS 35601 is a triple vasopeptidase inhibitor (VPI) of angiotensin-converting enzyme, neutral endopeptidase, and endothelin-converting enzyme-1 with respective IC50 values of 22, 2, and 55 nM. We characterized the safety profile and toxicity of escalating doses of CGS 35601 over a 20-day period in chronically instrumented, unrestrained, conscious, male, spontaneously hypertensive rats (SHR). Once instrumented with an arterial catheter, the SHR were placed in metabolic cages allowing daily assessment of hemodynamics and blood sampling for biochemical and hematological measurements. After a 7-day stabilization period, the SHR were divided into 2 groups: Gr. 1, (n = 13 to 18) receiving CGS 35601 at 0.01, 0.1, 1 and 5 mg kg(-1) day(-1) (continuous i.a. infusion) for 5 consecutive days/dose, followed by a 5-day washout; and Gr. 2, (n = 10) receiving vehicle (saline). The highest dose of CGS 35601 dose-dependently reduced MABP from 156 +/- 4 up to 94 +/- 5 mm Hg, whereas heart rate, metabolic, electrolytic, and hematological profiles, growth, diuresis, and renal activity were unaffected, and no hepatic or liver toxicities were observed. These results suggest that this novel triple VPI presents no safety concerns at this stage and may become of interest for the treatment of hypertension and other cardiovascular disorders. Long-term chronic experiments are needed to assess possible angioedema and increases in vascular permeability.
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Affiliation(s)
- P Daull
- Department of Medicine, Laval University, Laval Hospital Research Center, Quebec Heart and Lung Institute, Ste-Foy, QC, Canada
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Daull P, Blouin A, Belleville K, Beaudoin M, Arsenault D, Leonard H, Sirois P, Nantel F, Jeng AY, Battistini B. Triple VPI CGS 35601 reduces high blood pressure in low-renin, high-salt Dahl salt-sensitive rats. Exp Biol Med (Maywood) 2006; 231:830-3. [PMID: 16741007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
We previously reported that CGS 35601, a potent triple inhibitor of angiotensin-converting enzyme, neutral endopeptidase, and endothelin-converting enzyme 1, completely normalized mean arterial blood pressure (MABP) in 36-week-old spontaneously hypertensive rats, a normal renin model. The aim of the present study was to determine the effects of this triple vasopeptidase inhibitor (VPI) on the hemodynamic profile of instrumented, conscious, and unrestrained Dahl salt-sensitive (DSS) rats, a gene-prone, high-salt diet-induced low-renin hypertension model. Male DSS rats (mean weight [+/-SEM], 385 +/- 10 g) were fed a normal diet (Group 1) or a high-salt diet (Groups 2 and 3; 8% NaCl in food) for 6 weeks and then instrumented with a carotid catheter and placed individually in metabolic cages for 30 days. The hemodynamic, hematological, and biochemical profiles were assessed daily. Dose-dependent treatment started after a 7-day stabilization period in Groups 1 and 2 (vehicle dosage, 250 microl/hr) and Group 3 (CGS 35601 dosages of 0.1, 1, and 5 mg/kg/day for 6 days per dose by means of constant intra-arterial infusion), followed by a 5-day washout period. Two additional groups included normotensive Wistar rats (Group 4) and DSS rats that received a double high-salt solid (8% NaCl) and liquid (1% NaCl) diet (Group 5). The MABP in rats receiving CGS 35601 decreased in a dose-dependent fashion toward the baseline level observed in DSS rats receiving a normal diet. The heart rate was unaffected. The hemodynamic profile returned to normal during the washout period. This novel triple VPI is a potent and effective antihypertensive agent with a safe short-term profile that may be of interest for treating hypertension and other cardiovascular diseases. Other hypertensive rat models are being tested.
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Affiliation(s)
- P Daull
- Laval Hospital Research Center, Quebec Heart & Lung Institute, Department of Medicine, Faculty of Medicine, Laval University, Pavilion Mallet-Room 2679, 2725 Chemin Ste-Foy, Ste-Foy, Canada, G1V 4G5
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Daull P, Blouin A, Beaudoin M, Gadbois S, Belleville K, Cayer J, Berthiaume N, Sirois P, Nantel F, Jeng AY, Battistini B. The hemodynamic and metabolic profiles of Zucker diabetic fatty rats treated with a single molecule triple vasopeptidase inhibitor, CGS 35601. Exp Biol Med (Maywood) 2006; 231:824-9. [PMID: 16741006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
CGS 35601 is a triple vasopeptidase inhibitor (VPI) of angiotensin converting enzyme (ACE), neutral endopeptidase (NEP), and endothelin (ET) converting enzyme-1 (ECE-1), with respective IC(50) values of 22, 2, and 55 nM. The aim of the present study was to establish the hemodynamic profile of Zucker diabetic fatty (Zdf)-Fatty rats, a high-fat diet gene-prone model developing spontaneous Type 2 diabetes (T2D) and the effects of CGS 35601. Male Zdf-Fatty (14 weeks, n = 17-23), Zdf-Lean (14 weeks, n = 8-10), and Wistar (14 weeks, n = 9-10) rats on distinct diets were implanted with a catheter in the left carotid and placed individually in a metabolic cage for 30 days. The hemodynamic profile and some metabolic biomarkers were assessed daily. After a 7-day stabilization period, the Zdf-Fatty rats were divided into two groups: Group 1, controls (n = 7-10) receiving vehicle-saline (250 microl/hr) and Group 2, (n = 10-13) receiving increasing doses of CGS 35601 (0.1, 1, and 5 mg/kg/day x 6 days each, intra-arterially) followed by a 5-day washout period. Mean arterial blood pressure (MABP) of young Zdf-Fatty rats was compared with age-matched Zdf-Lean and Wistar rats, which were found similar. MABP decreased by 5.9% (from baseline at 102 +/- 5 to 96 +/- 4 mmHg), 12.7% (to 89 +/- 6 mmHg) and 21.6% (to 80 +/- 4 mmHg), at 0.1, 1, and 5 mg/kg/day, respectively, in CGS 35601-treated Zdf-Fatty rats. Systolic and diastolic blood pressures were similarly reduced. The heart rate was not affected. Hyperglycemic status and insulin-resistance were not modulated by short-term treatment. CGS 35601 presented an excellent short-term safety profile. This novel molecule and class of VPI may be of interest for lowering vascular tone. Further long-term studies, once cardiovascular and renal complications have developed in this T2D rat model are warranted to define the efficacy of this class of VPI.
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Affiliation(s)
- P Daull
- Laval Hospital Research Center, Quebec Heart & Lung Institute, Department of Medicine, Laval University, Pavilion Mallet-Room 2679, 2725 Chemin Ste-Foy, Ste-Foy, QC, Canada, G1V 4G5
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Daull P, Blouin A, Cayer J, Beaudoin M, Belleville K, Sirois P, Nantel F, Chang TMS, Battistini B. Profiling biochemical and hemodynamic markers using chronically instrumented, conscious and unrestrained rats undergoing severe, acute controlled hemorrhagic hypovolemic shock as an integrated in-vivo model system to assess new blood substitutes. Vascul Pharmacol 2005; 43:289-301. [PMID: 16253569 DOI: 10.1016/j.vph.2005.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Accepted: 09/05/2005] [Indexed: 10/25/2022]
Abstract
The aim of the present study was to assess several biochemical and physiological endpoint parameters alongside controlled hemorrhagic and recovery phases of chronically instrumented, conscious and unrestrained healthy rats. Male Sprague-Dawley rats (12-14 weeks; 430+/-20 g; n=22-18) were instrumented with a saline-perfused femoral arterial catheter and placed individually in a metabolic cage for up to 20 days, allowing instant assessments of the hemodynamic profile and blood and urine sampling for hematological profile and biochemical measurements to assess hepatic, renal and metabolic functions. In addition, body weight, food and water intake, and diuresis were monitored daily. After a 7-day stabilization period, the rats underwent severe and acute hemorrhagic shock (HS) (removal of 50% of total circulating blood volume), kept in hypovolemic shock for an ischemic period of 50 min and then resuscitated over 10 min. Gr. 1 was re-infused with autologous shed blood (AB; n=10) whereas Gr. 2 was infused 1:1 with a solution of sterile saline-albumin (SA; 7% w/v) (n=8-12). Ischemic rats recovered much more rapidly following AB re-infusion than those receiving SA. Normal hemodynamic and biochemical profiles were re-established after 24 h. Depressed blood pressure lasted 4-5 days in SA rats. The hematological profile in the SA resuscitated rats was even more drastically affected. Circulating plasma concentrations of hemoglobin (-40%), hematocrit (-50%), RBC (-40%) and platelets (-41%) counts were still severely decreased 24 h after the acute ischemic event whereas WBC counts increased 2.2-fold by day 4. It took 5-9 days for these profiles to normalize after ischemia-reperfusion with SA. Diuresis increased in both groups (by 45+/-7% on day 1) but presented distinct electrolytic profiles. Hepatic and renal functions were normal in AB rats whereas altered in SA rats. The present set of experiments enabled us to validate a model of HS in conscious rats and the use of an integrated in vivo platform as a valuable tool to characterize HS-induced stress and to test new classes of blood substitutes in real time, post-event, over days.
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Affiliation(s)
- P Daull
- Laval Hospital Research Center, Quebec Heart and Lung Institute, Department of Medicine, Faculty of Medicine, Laval University, Québec, QC, Canada
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Beaudoin M. Book Review: Problems in Anaesthesia: Current Issues in Cardiac Anesthesia. Anaesth Intensive Care 1999. [DOI: 10.1177/0310057x9902700222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- M. Beaudoin
- Cardiothoracic Anaesthesia, Prince of Wales Hospital, Sydney, N.S.W
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Abstract
PURPOSE The purpose of this study was to validate the commonly accepted indicators of risk of ischemic stroke that indicate the necessity for cerebral protection during carotid endarterectomy (CEA), and to examine the efficacy of high-dose thiopentone sodium (thiopental) as a cerebral protection method in patients who are at high risk of intraoperative ischemic stroke. METHOD In a prospective study of 37 CEAs performed for symptomatic stenosis > 70%, functional and clinical indicators of risk of ischemic stroke during carotid cross-clamping were identified. Functional indicators of risk were the development of ischemic electro-encephalogram (EEG) changes and stump pressure < 25 mm Hg. Clinical indicators of risk were previous ischemic hemispheric stroke and severe bilateral disease. These indicators were correlated in all patients, some of whom had two or three coexisting indicators of risk. The EEG and stump pressure were monitored continuously during carotid occlusion in all operations. Carotid occlusion times were recorded. Intraluminal shunting was eliminated in favor of high-dose thiopental cerebral protection in all patients. Neurologic outcome was deemed to measure the efficacy of thiopental protection in patients who are identified to be at risk and, hence, in need of cerebral protection. The validity of the indicators used to identify risk of ischemic stroke during CEA was assessed. RESULTS The absolute stroke risk was found to be 29.7% for the whole group (37 patients) and 57.9% in 19 patients who had commonly accepted indications for protective shunting. The correlation of ischemic EEG changes with stump pressure < 25 mm Hg was only 27.3%, whereas the expected correlation based on well-documented reports in the literature was 100%. The lack of correlation may have been related to the prevention of ischemic EEG changes by thiopental. There were no neurologic deficits in the series. CONCLUSIONS The absence of neurologic deficit in the study indicated that thiopental protection was effective in preventing ischemic stroke in high-risk patients and safely replaced intraluminal shunting.
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Affiliation(s)
- J E Frawley
- Department of Vascular and Transplantation Surgery, Prince Henry Hospital, University of New South Wales, Australia
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Leclerc A, Landre MF, Pietri F, Beaudoin M, David S. Evaluation of Interventions for Prevention of Back, Neck, and Shoulder Disorders in Three Occupational Groups. Int J Occup Environ Health 1997; 3:5-12. [PMID: 9891095 DOI: 10.1179/oeh.1997.3.1.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
An epidemiologic study was carried out in order to evaluate the effects of prevention programs at the workplace aimed at reducing back, neck, and shoulder morbidity among active workers. The intervention group included 275 workers in three occupational subgroups: hospital workers, warehouse workers, and office workers. The control group included 250 workers as comparable as possible to the intervention group. Comparisons were made, according to one-year changes in morbidity scores, for low back, upper back, neck, and shoulder disorders separately. An overall measure was also used. The one-year change in the overall measure was significantly different between the intervention group and the control group, indicating a positive effect of the prevention programs. Positive effects were stronger for some sites of pain and some occupational groups.
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Affiliation(s)
- A Leclerc
- INSERM Unit 88, HNSM, 14 rue du Val d'Osne, 94410 Saint-Maurice, France
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Beaudoin M, Bensaada A, Leonelli R, Desjardins P, Masut RA, Isnard L, Chennouf A, L'Espérance G. Self-consistent determination of the band offsets in InAsxP1-x/InP strained-layer quantum wells and the bowing parameter of bulk InAsxP1-x. Phys Rev B Condens Matter 1996; 53:1990-1996. [PMID: 9983661 DOI: 10.1103/physrevb.53.1990] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Aboujaoude M, Noel B, Beaudoin M, Ghattas G, Lalonde L, Oliva VL. Pseudoaneurysm of the proper hepatic artery with duodenal fistula appearing as a late complication of blunt abdominal trauma. J Trauma 1996; 40:123-5. [PMID: 8576975 DOI: 10.1097/00005373-199601000-00024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Posttraumatic pseudoaneurysms of the hepatic artery are rare and usually occur as a complication of open abdominal trauma. Even less common is the coexisting presence of enteric fistulization. We report a patient with upper gastrointestinal hemorrhage occurring 3 years after blunt abdominal trauma resulting from a pseudoaneurysm of the proper hepatic artery with duodenal fistulization. The patient was treated successfully by ligation of the proper hepatic artery and closure of the duodenal opening.
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Affiliation(s)
- M Aboujaoude
- Department of Surgery, Notre-Dame Hospital, Montreal, Quebec, Canada
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Abstract
The antimicrobial activities of penicillin (PEN), ampicillin (AMP), cephalothin (CT), trimethoprim-sulphamethoxazole (TMP-SMX), streptomycin (STM), and gentamicin (GM) against 122 representative strains of Streptococcus suis, were compared by the agar dilution procedure. The current US National Committee for Clinical Laboratory Standards (NCCLS) breakpoints for non-enterococcal streptococci were used for PEN, AMP, CT, and TMP-SMX. Overall, 50% of strains were not fully susceptible to PEN, whereas these percentages for AMP and CT were 9% and 6% respectively. One strain was resistant to TMP-SMX. High-level GM resistance could not be detected, but more than 46% of strains were highly resistant to STM (MIC > 2000 mg l-1). This high percentage of resistance to STM precludes the use of this aminoglycoside-penicillin combination as empiric therapy in severe S. suis infections. These results should prompt microbiology laboratories to carry out antimicrobial susceptibility tests on a routine basis on S. suis isolates.
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Beaudoin M, Harel J, Higgins R, Gottschalk M, Frenette M, MacInnes JI. Molecular analysis of isolates of Streptococcus suis capsular type 2 by restriction-endonuclease-digested DNA separated on SDS-PAGE and by hybridization with an rDNA probe. ACTA ACUST UNITED AC 1993; 138:2639-45. [PMID: 1362584 DOI: 10.1099/00221287-138-12-2639] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study was undertaken to assess the discriminatory value of restriction endonuclease (RE) digestion patterns of Streptococcus suis chromosomal DNA using polyacrylamide gel electrophoresis (SDS-PAGE) and DNA-rDNA hybridization. For the RE digestion patterns, DNAs were digested separately with the enzymes BamHI and BglII and the resultant fragments were separated by SDS-PAGE. An Escherichia coli rDNA probe derived from pKK3535 was used for the hybridization. Twenty-three S. suis capsular type 2 isolates recovered from diseased and clinically healthy pigs, from a human case, and from a cow were compared in this study. The majority of isolates associated with septicaemia belonged to one restriction endonuclease analysis (REA) profile group. Isolates associated with pneumonia belonged either to the REA profile group of isolates associated with septicaemia or to a second REA profile group. The REA profiles of isolates from clinically healthy animals were more heterogeneous. The REA profile of the type 2 reference strain, S735, which was originally isolated from a pig, was very different from those of the porcine and bovine isolates but similar to the profile of the human isolate. The profiles obtained after rDNA hybridization were more homogeneous. Although different patterns were detected in the 23 isolates, there was no correlation between the source of the isolate and the patterns observed with this technique.
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Affiliation(s)
- M Beaudoin
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
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