111 results on '"Lauzon, S."'
Search Results
2. Detection and Characteristics of Temporal Encephaloceles in Patients with Refractory Epilepsy
- Author
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Campbell, Z.M., primary, Hyer, J.M., additional, Lauzon, S., additional, Bonilha, L., additional, Spampinato, M.V., additional, and Yazdani, M., additional
- Published
- 2018
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3. The relationship between mental health and psychotropic drug use among the elderly living in the community
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Voyer, P., Lauzon, S., and Collin, J.
- Subjects
Health ,Seniors - Abstract
The prevalence of psychotropic drug use among the elderly is of great concern. Mental health appears to be a significant predictor of psychotropic drugs use. The objective of the study was to further examine the relationship between mental health and psychotropic drug use. A longitudinal research with repeated measurements was performed. The study took place over 16 weeks and consisted of five four-week intervals measurements followed by in-depth interviews. A light program of physical activity was included in the study to add a further dynamic to the interaction between the mental health and psychotropic drug use variables. Two apartment buildings for healthy elderly people were randomly selected for the study. Forty-eight participants within those buildings were nonrandomly enrolled in the program. The results put forward a revision of the association of mental health and psychotropic drug use according to whether the elderly were beginning or maintaining long-term drug use. Dependency and ageism instead of mental health particularly influenced long-term users.
- Published
- 2002
4. Mental health, stress correlates and psychotropic drug use or non-use among aged caregivers to elders with dementia
- Author
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Pérodeau, G., primary, Lauzon, S., additional, Lévesque, L., additional, and Lachance, L., additional
- Published
- 2001
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5. Investigation of a 17β-estradiol-monoclonal antiestradiol antibody binding mechanism using dilute solutions of organic solvents
- Author
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de Lauzon, S., primary, Rajkowski, K.M., additional, and Cittanova, N., additional
- Published
- 1994
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- View/download PDF
6. Kinetics and stability of Δ5-3-ketosteroid isomerase from Pseudomonas testosteroni in the system of reverse micelles of aerosol OT in isooctane
- Author
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Levashov, A.V., primary, Khettal, B., additional, de Lauzon, S., additional, Waks, M., additional, and Cittanova, N., additional
- Published
- 1992
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7. Research method issue: recruiting and retaining subjects in a research study.
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Voyer P, Lauzon S, Collin J, and Cousins SO
- Subjects
- *
HUMAN research subjects , *RESEARCH methodology , *PHYSICAL fitness for older people , *NURSING research - Abstract
This article considers recruitment and retention of study subjects, two vital elements of the research process. Using as an example a Canadian programme to engage older people in physical activity, Philippe Voyer, Sylvie Lauzon, Johanne Collin and Sandy O'Brien Cousins describe how these twin challenges can be addressed. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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8. Validation de la version française du Health of the Nation Outcome Scales (HoNOS-F).
- Author
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Lauzon, S, Corbière, M, Bonin, J P, Bonsack, C, Lesage, A D, and Ricard, N
- Subjects
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PSYCHIATRIC diagnosis , *MENTAL illness , *COMPARATIVE studies , *HEALTH status indicators , *LANGUAGE & languages , *RESEARCH methodology , *MEDICAL cooperation , *PSYCHOLOGY of people with intellectual disabilities , *REHABILITATION of people with mental illness , *HEALTH outcome assessment , *PSYCHOMETRICS , *QUESTIONNAIRES , *RESEARCH , *SOCIAL adjustment , *ETHNOLOGY research , *EVALUATION research , *SOCIAL context ,RESEARCH evaluation - Abstract
Objective: This study reports the validation of the French version of the Health of the Nation Outcome Scales (HoNOS-F), a questionnaire developed to measure health and social functioning of people with mental illness.Method: Once each statement was tested for readability, the scale was administered to 3 samples of people suffering from severe mental disorders to estimate its reliability and validity. More specifically, tests were run to establish the internal consistency, the stability, and the interrater reliability of the HoNOS-F. Confirmative factor analyses and mean differences according to age, sex, and diagnosis were also conducted to evaluate respectively construct- and criterion-related validity.Results: Coefficients obtained from the various tests show that the scale is reliable only when the total score is used. The confirmatory factor analyses indicate that the observed data do not fit the 2 proposed models, a unidimensional model and a 4-dimension model. However, the scale did show criterion-related validity.Conclusions: Results of the present study converge with those obtained on the original widely used English version. Therefore, we suggest that clinicians use the questionnaire by referring to each item separately and by considering such patient characteristics as age, sex, and diagnosis. We also suggest that researchers wishing to evaluate health and social functioning of persons with serious mental disorders use the total score. Caution is, however, warranted when interpreting the total score for a French-speaking population, because the factorial solution 1-dimension model did not prove to be satisfactory. [ABSTRACT FROM AUTHOR]- Published
- 2001
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9. Improvement of Estradiol Enzymoimmunoassay, Using a Monoclonal Antibody and an Avidin/Biotin Amplification System.
- Author
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Lauzon, S. de, Jabri, J. El, Desfasses, B., and Cittanova, N.
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- 1989
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10. Family functioning following pediatric intensive care unit hospitalization.
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Youngblut JM and Lauzon S
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- 1995
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11. Advanced nursing practice: a hidden treasure.
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Goulet C, Lauzon S, and Ricard N
- Abstract
Copyright of Enfermería Clínica is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2003
12. Studies of the reactivity of artificial peroxidase-like hemoproteins based on antibodies elicited against a specifically designed ortho-carboxy substituted tetraarylporphyrin
- Author
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Lauzon, S. De, Desfosses, B., Mansuy, D., and Mahy, J.-P.
- Published
- 1999
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13. The comparative specificity of three oestradiol-binding proteins. Rat α-foetoprotein, rat liver 17β-hydroxy steroid dehydrogenase and anti-(oestradiol-6-carboxymethyloxime-bovine serum albumin) antiserum
- Author
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Laurant, C, de Lauzon, S D, Cittanova, N, Nunez, E, and Jayle, M F
- Abstract
1. The specificity of 3 oestradiol-binding proteins was studied. Two of these proteins are naturally occurring (rat α-foetoprotein and rat liver microsomal 17β-hydroxy steroid dehydrogenase) and the third is an artificially induced model, anti-(oestradiol-6-carboxymethyloxime-bovine serum albumin) γ-globulins. 2. A specific binding procedure for each protein model permitted a determination of its affinity for oestradiol and for 30 other steroids. 3. The results obtained have brought to light the different areas of the steroid molecule that are important for its recognition by each of the three proteins. The two naturally occurring proteins (α-foetoprotein and 17β-hydroxy steroid dehydrogenase) recognize the edge of the steroid defined by C-4, C-6, C-8 and C-15. On the other hand, the γ-globulins recognize the opposite edge, i.e. that defined by C-2, C-10, C-11 and C-17. 4. Diethylstilboestrol, whose structure is analogous to that of a steroid, is only recognized by the two naturally occurring proteins.
- Published
- 1975
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14. Improvement of Estradiol Enzymoimmunoassay, Using a Monoclonal Antibody and an Avidin/Biotin Amplification System
- Author
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de Lauzon, S., Jabri, J. El, Desfasses, B., and Cittanova, N.
- Abstract
A microtitre plate enzyme immunoassay for estradiol, using a purified monoclonal antibody covalently bound to peroxidase and a small amount of immobilized immunogen, was optimized. Decreasing the antibody concentration to 2×10-10M (Kd/5) gave optimum estradiol detectability.The enzymatic signal was, however, very low in this assay. A 14-fold enhancement could be obtained using an avidin-biotin system in which several biotin molecules are conjugated with the antibody, providing multiple sites for binding by an avidin-enzyme complex. Further reagent concentration optimization gave an assay in which a range of 2 to 140 pg estradiol/well could be assayed simply and reproducibly.
- Published
- 1989
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15. Why robotic process automation is quickly becoming a must for downstream companies.
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ANDRADE, A. and LAUZON, S.
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- *
ROBOTIC process automation , *ENTERPRISE resource planning , *BUSINESS enterprises - Abstract
The article offers information on how robotic process automation (RPA) has been becoming important for downstream companies. It mentions that RPA has been gaining a stronger foothold in the oil and gas business, which has a long history of process automation. It discusses that how RPA help energy companies capture new efficiencies and improve productivity across their operations and supply chains.
- Published
- 2022
16. Improvement of estradiol enzymoimmunoassay, using a monoclonal antibody and an avidin/biotin amplification system
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el Jabri J, Cittanova N, de Lauzon S, and Desfosses B
- Subjects
Pharmacology ,Immunogen ,medicine.diagnostic_test ,biology ,Estradiol ,medicine.drug_class ,Immunology ,Antibodies, Monoclonal ,Biotin ,Monoclonal antibody ,Avidin ,Immunoenzyme Techniques ,chemistry.chemical_compound ,Biochemistry ,chemistry ,Evaluation Studies as Topic ,Reagent ,Immunoassay ,medicine ,biology.protein ,Antibody ,Peroxidase - Abstract
A microtitre plate enzyme immunoassay for estradiol, using a purified monoclonal antibody covalently bound to peroxidase and a small amount of immobilized immunogen, was optimized. Decreasing the antibody concentration to 2×10−10M (Kd/5) gave optimum estradiol detectability. The enzymatic signal was, however, very low in this assay. A 14-fold enhancement could be obtained using an avidin-biotin system in which several biotin molecules are conjugated with the antibody, providing multiple sites for binding by an avidin-enzyme complex. Further reagent concentration optimization gave an assay in which a range of 2 to 140 pg estradiol/well could be assayed simply and reproducibly.
- Published
- 1989
17. Abstracts of Papers Submitted in 1979 for Publication
- Author
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WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, Lauzon,S M, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, and Lauzon,S M
- Published
- 1979
18. Sterically Biased 3,3-Sigmatropic Rearrangement of Azides: Efficient Preparation of Nonracemic α-Amino Acids and Heterocycles
- Author
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Gagnon, D., Lauzon, S., Godbout, C., and Spino, C.
- Abstract
Homochiral α-amino acids, heterocycles, and carbocycles are efficiently constructed via a short sequence of reactions starting from the chiral auxiliary p-menthane-3-carboxaldehyde. The key feature of the sequence is a highly selective tandem Mitsunobu/3,3-sigmatropic rearrangement of hydrazoic acid that procures enantiomerically enriched allylic azides. The sequence is either terminated by oxidative cleavage to provide amino acids or by ring-closing metathesis to provide heterocycles or carbocycles bearing nitrogen. - Published
- 2005
19. Protection of substrate against enzymatic action by binding to proteins. Dependence upon enzyme and binding protein.
- Author
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de Lauzon, S., primary, Christeff, N., additional, Hervé, F., additional, and Cittanova, N., additional
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- 1980
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20. Murine monoclonal antibody against aldosterone: Production, characterization and use for enzymoimmunoassay
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de Lauzon, S., primary, Le Trang, N., additional, Moreau, M.F., additional, Gentin, M., additional, Christeff, N., additional, Desfosses, B., additional, and Cittanova, N., additional
- Published
- 1987
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21. A new approach for quantitative evaluation of cross-reactivity of steroids with an antiserum by radioimmunoassay: Application to a highly specific antiestriol
- Author
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de Lauzon, S., primary, Cittanova, N., additional, Desfosses, B., additional, and Jayle, M.F., additional
- Published
- 1973
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22. Paramètres de liaison du 16 α, 17 β‐estriol avec des immunsérums antiestriol hautement spécifiques de lapins et de brebis
- Author
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Savu, L., primary, de Lauzon, S., additional, Rombauts, P., additional, and Jayle, M.F., additional
- Published
- 1973
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23. Determination of progesterone and of free and conjugated estrogens in pregnant and pseudo-pregnant rats
- Author
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de Lauzon, S., Uhrich, F., Vandel, S., Cittanova, N., and Jayle, M.F.
- Published
- 1974
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24. Investigation of a 17 -estradiol-monoclonal antiestradiol antibody binding mechanism using dilute solutions of organic solvents
- Author
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Lauzon, S. De, Rajkowski, K. M., and Cittanova, N.
- Published
- 1994
- Full Text
- View/download PDF
25. Meconium as an Analyte for Androgen Exposure: Analysis Through Varying Maternal-Fetal Biomarkers.
- Author
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Knudsen N, Tang S, Lauzon S, Dhaurali S, Snyder NW, and Voegtline KM
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- Humans, Female, Pregnancy, Infant, Newborn, Adult, Male, Androgens analysis, Meconium chemistry, Meconium metabolism, Testosterone analysis, Testosterone metabolism, Dehydroepiandrosterone analysis, Dehydroepiandrosterone metabolism, Saliva chemistry, Fetal Blood chemistry, Biomarkers
- Abstract
Meconium, the first stool produced by neonates, has been used as an analyte for exogenous fetal exposures. However, few studies have investigated the relationship between meconium and androgen exposure in utero. Here, we examine the associations of testosterone and dehydroepiandrosterone (DHEA) across maternal antenatal salivary testosterone, cord blood, meconium, and infant salivary testosterone. A total of 47 women with singleton, uncomplicated pregnancies, and their infants were included in this study. Participants were recruited from an academic obstetric clinic. Maternal saliva was collected at 36-weeks' gestation. Cord blood and meconium were collected at birth. Infant salivary testosterone was collected at 1 and 4 weeks of age. Multivariate model results showed that meconium testosterone was associated with neonatal testosterone at 1 (F = 5.62, p = 0.029) and 4 weeks (F = 4.28, p = 0.048) postnatal age; no sex differences were detected. This study suggests meconium is a valuable tool for evaluating endogenous androgen exposure and should be used in future studies to investigate the fetal hormonal milieu., (© 2024 Wiley Periodicals LLC.)
- Published
- 2024
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26. Maternal Work and Infant Feeding Practices in the First 6 Months.
- Author
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Fiedor AR, Lauzon S, Dhaurali S, and Voegtline KM
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- Humans, Female, Adult, Prospective Studies, Infant, Infant, Newborn, Women, Working psychology, Women, Working statistics & numerical data, Stress, Psychological psychology, Employment statistics & numerical data, Logistic Models, Male, Socioeconomic Factors, Young Adult, Pregnancy, Postpartum Period psychology, Breast Feeding statistics & numerical data, Breast Feeding psychology, Mothers psychology, Mothers statistics & numerical data
- Abstract
Objectives: The purpose of this study was to examine the relationship between maternal work and infant feeding practices and explore the moderating impact of parental stress., Methods: Prospective data on categorical hours worked and infant feeding practices were collected at 3 and 6 months postpartum in a prospective prenatal cohort of 95 women. Chi-square tests were used to compare change in proportion of exclusive breastfeeding from birth to 6 months and maternal work status., Results: Rates of exclusive breastfeeding significantly decreased from birth to 6 months, while the percent of mothers working outside of the home significantly increased from 3 to 6 months. At 6 months, mothers who worked full time pumped significantly more than their non-working counterparts. Multivariate logistic regression models were used to test the prediction of exclusive breastfeeding by maternal work, including sociodemographic covariates, and the moderating impact of parental stress. Results indicated that maternal education, paternal education, and maternal work significantly predicted exclusive breastfeeding at 6 months. Full time work (OR = 0.09, 95% CI = 0.01, 0.62) was associated with a decreased odds of exclusive breastfeeding. Additionally, higher maternal (OR = 1.44, 95% CI = 1.05, 1.97) and paternal (OR = 1.28, 95% CI = 1.00, 1.66) education was associated with an increased odds of exclusive breastfeeding. Maternal stress did not predict exclusive breastfeeding, nor did it have a moderating effect on the relationship between maternal work and breastfeeding., Conclusions for Practice: Future studies should investigate maternal work in more diverse birthing populations to better understand how families can incorporate breastfeeding as a primary infant feeding practice., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2024
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27. Association Between Frailty and Head Impact Location After Ground-Level Fall in Older Adults.
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Dubucs X, Mercier É, Boucher V, Lauzon S, Balen F, Charpentier S, and Emond M
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- Humans, Female, Male, Aged, Aged, 80 and over, Prospective Studies, Emergency Service, Hospital statistics & numerical data, Emergency Service, Hospital organization & administration, Frail Elderly statistics & numerical data, Craniocerebral Trauma complications, Craniocerebral Trauma epidemiology, Accidental Falls statistics & numerical data, Frailty complications, Frailty epidemiology
- Abstract
Background: Mild traumatic brain injuries (TBIs) are highly prevalent in older adults, and ground-level falls are the most frequent mechanism of injury., Objective: This study aimed to assess whether frailty was associated with head impact location among older patients who sustained a ground-level fall-related, mild TBI. The secondary objective was to measure the association between frailty and intracranial hemorrhages., Methods: We conducted a planned sub-analysis of a prospective observational study in two urban university-affiliated emergency departments (EDs). Patients 65 years and older who sustained a ground-level fall-related, mild TBI were included if they consulted in the ED between January 2019 and June 2019. Frailty was assessed using the Clinical Frailty Scale (CFS). Patients were stratified into the following three groups: robust (CFS score 1-3), vulnerable-frail (CFS score 4-6), and severely frail (CFS score 7-9)., Results: A total of 335 patients were included; mean ± SD age was 86.9 ± 8.1 years. In multivariable analysis, frontal impact was significantly increased in severely frail patients compared with robust patients (odds ratio [OR] 4.8 [95% CI 1.4-16.8]; p = 0.01). Intracranial hemorrhages were found in 6.2%, 7.5%, and 13.3% of robust, vulnerable-frail, and severely frail patients, respectively. The OR of intracranial hemorrhages was 1.24 (95% CI 0.44-3.45; p = 0.68) in vulnerable-frail patients and 2.34 (95% CI 0.41-13.6; p = 0.34) in those considered severely frail., Conclusions: This study found an association between the level of frailty and the head impact location in older patients who sustained a ground-level fall. Our results suggest that head impact location after a fall can help physicians identify frail patients. Although not statistically significant, the prevalence of intracranial hemorrhage seems to increase with the level of frailty., Competing Interests: Declaration of competing interest None., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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28. Analyses of response time data in the same-different task.
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Cousineau D, Harding B, Walker JA, Durand G, T-Groulx J, Lauzon S, and Goulet MA
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- Humans, Reaction Time physiology, Attention physiology
- Abstract
The Same-Different task presents two stimuli in close succession and participants must indicate whether they are completely identical or if there are any attributes that differ. While the task is simple, its results have proven difficult to explain. Notably, response times are characterized by a fast-same effect whereby Same responses are faster than Different responses even though identical stimuli should be exhaustively processed to be accurate. Herein, we examine a little more than a quarter million response times (N = 255,744) obtained from 327 participants who participated in one of 14 variants of the task involving minor changes in the stimuli or their durations. We performed distribution fitting and analyzed estimated parameters stemming from the ex-Gaussian, lognormal, and Weibull distributions to infer the cognitive processing characteristics underlying this task. The results exclude serial processing of the stimuli and do not support dual-route processing. The fast-same effect appears only through a shift of the entire response time distributions, a feature impossible to detect solely with mean response time analyses. An attention-modulated process driven by entropy may be the most adequate model of the fast-same effect. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
- Published
- 2023
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29. Fluorine in metal-catalyzed asymmetric transformations: the lightest halogen causing a massive effect.
- Author
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Lauzon S and Ollevier T
- Abstract
This review aims at providing an overview of the most significant applications of fluorine-containing ligands reported in the literature starting from 2001 until mid-2021. The ligands are classified according to the nature of the donor atoms involved. This review highlights both metal-ligand interactions and the structure-reactivity relationships resulting from the presence of the fluorine atom or fluorine-containing substituents on chiral catalysts., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)
- Published
- 2022
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30. Convenient synthesis of tricyclic N(1)-C(2)-fused oxazino-indolones via [Au(I)] catalyzed hydrocarboxylation of allenes.
- Author
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Pedrazzani R, Pinosa E, Bertuzzi G, Monari M, Lauzon S, Ollevier T, and Bandini M
- Abstract
A new [Au(I)] catalyzed intramolecular hydrocarboxylation of allenes is presented as a valuable synthetic route to oxazino-indolones. The use of 3,5-(CF
3 )2 -C6 H3 -ImPyAuSbF6 as the optimal catalyst (5 mol%) was necessary to guarantee (i) wide tolerance of functional groups, (ii) mild reaction conditions (r.t., 16 h), and (iii) high yields (up to 90%). Preliminary attempts towards an enantioselective version (81 : 19 er) are also documented by means of a new family of chiral C1 -symmetric ImPyAuCl complexes.- Published
- 2022
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31. Integrated Alzheimer's Disease Rating Scale: Clinically meaningful change estimates.
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Wessels AM, Rentz DM, Case M, Lauzon S, and Sims JR
- Abstract
Introduction: The Integrated Alzheimer's Disease Rating Scale (iADRS) has been used to detect differences in disease progression in early Alzheimer's disease (AD). The objectives of this study were to enhance understanding of iADRS point changes within the context of clinical trials, and to establish a minimal clinically important difference (MCID) on the iADRS., Methods: Data from AMARANTH and EXPEDITION3 were analyzed using various approaches, including anchor-based, distribution-based, regression analyses, and cumulative distribution function (CDF) plots. Three potential anchors were examined, including the Clinical Dementia Rating-Sum of Boxes, Mini-Mental State Examination, and Functional Activities Questionnaire. Triangulation of all results was used to determine the MCID for participants with mild cognitive impairment (MCI) due to AD and AD with mild dementia., Results: All three anchors met criteria for "sufficiently associated" (|r| = 0.4-0.7). Cumulatively, results from anchor-based and distribution-based results converged to suggest an iADRS MCID of 5 points for MCI due to AD and 9 points for AD with mild dementia. Regression analyses and CDF plots supported these values., Discussion: These findings suggest the iADRS can be used in clinical trials to detect a clinically meaningful outcome of AD progression., Competing Interests: Alette M. Wessels, Michael Case, Steve Lauzon, and John R. Sims are all employees and minor shareholders at Eli Lilly and Company. Dorene M. Rentz reports consulting relationships with Biogen IDEC and Digital Cognition Technologies; she also serves on the Scientific Advisory Board for Neurotrack., (© 2022 Eli Lilly and Company. Alzheimer's & Dementia: Translational Research & Clinical Interventions published by Wiley Periodicals LLC on behlaf of Alzheimer's Association.)
- Published
- 2022
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32. Ontogeny of the Dyad: the Relationship Between Maternal and Offspring Neuroendocrine Function.
- Author
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Voegtline KM, Dhaurali S, Wainger J, and Lauzon S
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- Child, Female, Humans, Hypothalamo-Hypophyseal System, Infant, Mother-Child Relations, Mothers, Pituitary-Adrenal System, Pregnancy, Saliva, Stress, Psychological, Hydrocortisone, Prenatal Exposure Delayed Effects
- Abstract
Purpose of Review: We review ontogeny of the maternal-offspring neuroendocrine relationship in human pregnancy. We present bidirectional genetic, physiological, and behavioral influences that enhance or disrupt HPA activity and its end product cortisol at the individual level and within the dyad., Recent Findings: Consistent evidence supports that maternal mood and caregiving behavior are associated with maternal and offspring cortisol levels. Select studies support the buffering effects of antidepressant use and maternal positive affect on offspring cortisol. Growing research highlights evocative effects of fetal neuroendocrine activity, antenatal gene transfer, and infant behavioral distress and risk characteristics on maternal cortisol levels and dyadic attunement. There is potential to advance our understanding of the mother-offspring neuroendocrine relationship by consideration of other neuroactive steroids in addition to cortisol, and to consider developmental timing and measurement source in study design. Future study should emphasize in what context or for whom neuroendocrine attunement is adaptive versus maladaptive for mother and child., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2022
- Full Text
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33. C 2 -Symmetric 2,2'-Bipyridine-α,α'-1-adamantyl-diol Ligand: Bulky Iron Complexes in Asymmetric Catalysis.
- Author
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Lauzon S, Schouwey L, and Ollevier T
- Abstract
The synthesis of a chiral 2,2'-bipyridine-α,α'-1-adamantyl-diol ligand was achieved starting from commercially available materials. The bulky ligand was synthesized in three steps in 40% overall yield with stereoselectivities of 98% de and >99.5% ee for the S , S enantiomer. The absolute configuration of and structural insights into a heptacoordinated 2,2'-bipyridine-α,α'-1-Ad-diol/Fe
II chiral complex were obtained from single-crystal diffraction analyses. The newly synthesized ligand was used in iron-catalyzed asymmetric Mukaiyama aldol, thia-Michael, and Diels-Alder reactions.- Published
- 2022
- Full Text
- View/download PDF
34. 2,2'-Bipyridine-α,α'-trifluoromethyl-diol ligand: synthesis and application in the asymmetric Et 2 Zn alkylation of aldehydes.
- Author
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Lauzon S and Ollevier T
- Abstract
A chiral 2,2'-bipyridine ligand (1) bearing α,α'-trifluoromethyl-alcohols at 6,6'-positions was designed in five steps affording either the R , R or S , S enantiomer with excellent stereoselectivities, i.e. 97% de, >99% ee and >99.5% de, >99.5% ee, respectively. The key step for reaching high levels of stereoselectivity was demonstrated to be the resolution of the α-CF
3 -alcohol using ( S )-ibuprofen as the resolving agent. An initial application for the 2,2'-bipyridine-α,α'-CF3 -diol ligand was highlighted in the ZnII -catalyzed asymmetric ethylation reaction of aromatic, heteroaromatic, and aliphatic aldehydes. Synergistic electron deficiency and steric hindrance properties of the newly developed ligand afforded the corresponding alcohols in good to excellent yields (up to 99%) and enantioselectivities (up to 95% ee). As observed from single crystal diffraction analysis, the complexation of the 2,2'-bipyridine-α,α'-CF3 -diol ligand generates an unusual hexacoordinated ZnII .- Published
- 2021
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35. Ixekizumab improves sleep and work productivity in patients with non-radiographic axial spondyloarthritis: results from the COAST-X trial at 52 weeks.
- Author
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Deodhar A, Mease P, Marzo-Ortega H, Hunter T, Sandoval D, Kronbergs A, Lauzon S, Leung A, and Navarro-Compán V
- Abstract
Background: Patients with non-radiographic axial spondyloarthritis experience negative impacts on sleep, work productivity, and activity impairment. Ixekizumab, a monoclonal antibody selectively targeting interleukin-17A, has shown efficacy in treating the signs and symptoms of non-radiographic axial spondyloarthritis. This analysis evaluated the effect of ixekizumab treatment on sleep, work productivity, and activity impairment in patients with non-radiographic axial spondyloarthritis., Methods: COAST-X ( NCT02757352 ) was a 52-week, phase 3, multicenter, randomised placebo-controlled trial evaluating 80-mg ixekizumab every 2 weeks and every 4 weeks in patients with active non-radiographic axial spondyloarthritis. Sleep disturbance was measured with the Jenkins Sleep Evaluation Questionnaire (JSEQ) and analysed using mixed-effects models for repeated measures. Work productivity and activity impairment were measured using the Work Productivity and Activity Impairment Questionnaire for Spondyloarthritis and analysed using analysis of covariance. Absenteeism, presenteeism, and overall work impairment were assessed for patients reporting paid work; activity impairment was assessed regardless of work status., Results: Overall, patients treated with both dosing regimens of ixekizumab reported numerically greater improvements in sleep than placebo through Week 52. At Weeks 16 and 52, patients treated with ixekizumab every 4 weeks had significantly greater improvements in presenteeism (p = 0.007 and p = 0.003, respectively) and overall work impairment (p = 0.014 and p = 0.005, respectively) and numeric improvements in absenteeism than placebo. Patients treated with ixekizumab every 2 weeks had numerically greater improvements in absenteeism, presenteeism, and overall work impairment than placebo. Both dosing regimens of ixekizumab were associated with significantly greater improvements in activity impairment than placebo (ixekizumab every 4 weeks: p = 0.003 at Week 16 and p = 0.004 at Week 52; ixekizumab every 2 weeks: p = 0.007 at Week 16 and p = 0.006 at Week 52)., Conclusions: Treatment with ixekizumab improved sleep, work productivity, and activity impairment in patients with nr-axSpA. Improvements in presenteeism and overall work impairment were sustained and consistent in the patients treated with ixekizumab every 4 weeks from Week 16 to Week 52. Improvements in activity impairment were sustained and consistent in both ixekizumab-treated groups from Week 16 to Week 52., Trial Registration: NCT02757352 , May 2, 2016., (© 2021. The Author(s).)
- Published
- 2021
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36. Ixekizumab improves spinal pain, function, fatigue, stiffness, and sleep in radiographic axial Spondyloarthritis: COAST-V/W 52-week results.
- Author
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Deodhar AA, Mease PJ, Rahman P, Navarro-Compán V, Strand V, Hunter T, Bolce R, Leon L, Lauzon S, and Marzo-Ortega H
- Abstract
Background: This analysis assessed improvements in patients with radiographic axial spondyloarthritis (r-axSpA) treated with ixekizumab in the Assessment of Spondyloarthritis International Society (ASAS) treatment response domains and additional patient-reported outcomes at 1 year of treatment., Methods: COAST-V and COAST-W were 52-week, phase 3, randomized controlled trials evaluating the efficacy and safety of ixekizumab in biologic disease-modifying antirheumatic drug (bDMARD)-naïve and tumor necrosis factor inhibitor (TNFi)-experienced patients with radiographic spondyloarthritis, respectively. Patients were treated with 80-mg ixekizumab either every 2 weeks or every 4 weeks. Patient-reported outcomes included Patient Global Disease Activity, Spinal Pain, stiffness as measured by Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) Questions 5 and 6, function as measured by the Bath Ankylosing Spondylitis Functional Index, fatigue as measured by the Fatigue Numeric Rating Scale and BASDAI question 1, Spinal Pain at Night, and sleep quality as measured by the Jenkins Sleep Evaluation Questionnaire. Mixed-effects models for repeated measures were used to analyze changes from baseline in patient-reported outcomes from weeks 1 to 16, and descriptive statistics were reported from weeks 20 to 52. Analysis of covariance with Scheffé's method was used for the ASAS response association analyses., Results: This study assessed 341 bDMARD-naïve and 316 TNFi-experienced patients in the placebo-controlled blinded treatment dosing period (weeks 1-16) as well as 329 bDMARD-naïve and 281 TNFi-experienced patients in the dose double-blind extended treatment period (weeks 20-52). bDMARD-naïve or TNFi-experienced patients treated with ixekizumab every 2 weeks and every 4 weeks reported improvements in patient global disease activity, spinal pain, function, stiffness, fatigue, spinal pain at night, and sleep quality through week 52. Greater correlations with improvements in all response domains were seen when comparing ASAS40 responders to ASAS20 non-responders (p < 0.001), with up to 10.5-fold greater improvements observed in ASAS40 responses compared with ASAS20 non-responders. Function and fatigue demonstrated the highest values., Conclusions: Ixekizumab-treated bDMARD-naïve and TNFi-experienced patients with radiographic axial spondyloarthritis achieving ASAS40 reported sustained and consistent improvement in all ASAS response domains and other patient-reported outcomes though week 52, with spinal pain, function, and stiffness as major drivers of the response., Trial Registration: NCT02696785 and NCT02696798 , March 2, 2016., (© 2021. The Author(s).)
- Published
- 2021
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37. Use of a 5-Item Modified Frailty Index for Risk Stratification in Patients Undergoing Breast Reconstruction.
- Author
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Hermiz SJR, Lauzon S, Brown G, and Herrera FA
- Subjects
- Humans, Postoperative Complications epidemiology, Postoperative Complications etiology, Reoperation, Retrospective Studies, Risk Assessment, Risk Factors, Frailty, Mammaplasty
- Abstract
Introduction: Frailty can be quantified using an index score to effectively predict surgical outcomes and complications. The modified frailty index (mFI) score includes 5 patient-specific medical history comorbidities including diabetes mellitus, congestive heart failure, hypertension, chronic obstructive pulmonary disease/pneumonia, and nonindependent functional status. The purpose of our study was to apply the 5-item mFI score to predict and minimize complications in patients undergoing breast reconstruction., Methods: The National Surgical Quality Improvement Program was queried for all patients undergoing primary breast reconstruction from 2016 to 2018. Patients were divided based on timing of reconstruction and type of reconstruction: immediate or delayed, and implant based or autologous based. A validated modified fragility score was applied to all patients. Patients were stratified by mFI scores of 0 (no comorbidities), 1 (1 comorbidity), and 2+ (2 or more comorbidities). Patient demographics and 30-day complications rates were recorded., Results: A total of 22,700 patients were identified. There were 10,673 patients who underwent immediate breast reconstruction, and 12,027 patients who underwent delayed breast reconstruction. A total of 14,159 patients underwent implant-based, and 8541 underwent autologous-based reconstruction. A total of 16,627 patients had an mFI score of 0, 4923 had a mFI score of 1, and 1150 had a mFI score of 2+. Compared with patients with an mFI score of 0, patients with an mFI score of 2 or greater were more likely to develop a postoperative complication (7.2 vs 12.3; P < 0.0001). Patients undergoing immediate reconstruction were more likely to develop a postoperative complications for every mFI category. The most common complications were wound and hematologic related., Conclusion: Patients with higher mFI scores are likely to have an increase in postoperative complications after breast reconstruction. Increasing body mass index increases postoperative complications independent of frailty index scores. Patients with increasing frailty index scores undergoing immediate breast reconstruction have a significantly higher risk of postoperative complications compared with delayed reconstruction.Patients with increasing frailty index scores undergoing autologous breast reconstruction have a significantly higher risk of postoperative complications compared with implant-based reconstruction. High frailty index scores are associated with a higher risk of postoperative complications, reoperation rates, and readmission rates. Patients with higher mFI scores may benefit from a delayed implant-based reconstruction., Competing Interests: Conflicts of interest and sources of funding: none declared., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2021
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38. Dopamine transporter (DAT1) gene in combat veterans with PTSD: A case-control study.
- Author
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Zuschlag ZD, Compean E, Nietert P, Lauzon S, Hamner M, and Wang Z
- Subjects
- Case-Control Studies, Dopamine Plasma Membrane Transport Proteins genetics, Genotype, Humans, Polymorphism, Genetic, Stress Disorders, Post-Traumatic genetics, Veterans
- Abstract
The dopamine transporter (DAT1) gene has been postulated to be involved in PTSD; however, existing studies have shown inconsistencies when examining genotypic and allelic associations. The primary objective of this study was to examine whether DAT1-40bp-VNTR (DAT1) 9R polymorphism might increase the risk of PTSD development in combat veterans, utilizing a case-control gene association study with both control and PTSD cases having previous exposure to combat traumas. Participants with PTSD (N = 365) and combat-exposed controls without PTSD (N = 298) were included in analysis. After controlling for race, sex and age, when dichotomized, absence of DAT1 10R/10R genotypes was associated with PTSD diagnosis compared to no PTSD diagnosis; these results were not statistically significant when trichotomized 10R/10R, 10R/X, 9R/9R. Similarly, odds ratio for absence of 10R/10R genotype showed a statistically significant increase in the risk of developing PTSD. DAT1 genotype was also associated with statistically significant mean total CAPS scores, both when dichotomized and trichotomized. In conclusion, our results indicate that the absence of 10R/10R is associated with an increased risk of PTSD and higher CAPS total scores., (Copyright © 2021. Published by Elsevier B.V.)
- Published
- 2021
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39. Cirrhotic Patients on Mechanical Ventilation Have a Low Rate of Successful Extubation and Survival.
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Sasso R, Lauzon S, and Rockey DC
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- Female, Hospital Mortality, Hospitalization statistics & numerical data, Humans, Intensive Care Units statistics & numerical data, Male, Middle Aged, Prognosis, Risk Factors, United States epidemiology, Vasoconstrictor Agents therapeutic use, Airway Extubation adverse effects, Airway Extubation statistics & numerical data, Critical Illness mortality, Critical Illness therapy, Liver Cirrhosis complications, Liver Cirrhosis diagnosis, Liver Cirrhosis mortality, Respiration, Artificial adverse effects, Respiration, Artificial methods, Respiratory Insufficiency complications, Respiratory Insufficiency therapy
- Abstract
Background and Aims: We hypothesized that mechanically ventilated cirrhotic patients not only have poor outcomes, but also that certain clinical variables are likely to be associated with mortality. We aimed to describe the predictors of mortality in these patients., Methods: This observational study examined 113 mechanically ventilated cirrhotic patients cared for at our institution between July 1, 2014, and February 28, 2018. We performed bivariate and multivariate analyses to identify risk factors for mortality on mechanical ventilation and created an equation to calculate probability of mortality based on these variables., Results: Seventy percent of patients had a history of a decompensating event. Altered mental status was the most frequently encountered indication for intubation (46%). 53% patients died on mechanical ventilation. After controlling for variables associated with increased mortality, multivariate analysis revealed that vasopressor use was the strongest predictor of mortality on mechanical ventilation (OR = 9.3) followed by sepsis (OR = 4.1). A formula with an area under the curve of 0.85 was obtained in order to predict the probability of mortality for cirrhotic patients on mechanical ventilation (available at https://medweb.musc.edu/mvcp/ ). This model (AUC = 0.85) outperformed the CLIF-SOFA score (AUC = 0.68) in predicting mortality in this cohort., Conclusion: Cirrhotic patients requiring mechanical ventilation have an extremely poor prognosis, and in patients requiring vasopressors, having a history of decompensation, sepsis or low albumin, mortality is higher. Our data points to the clinical variables should be considered in the medical management of these patients and provide physicians with a formula to predict the probability of mortality.
- Published
- 2020
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40. Profile of circulating microRNAs in myalgic encephalomyelitis and their relation to symptom severity, and disease pathophysiology.
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Nepotchatykh E, Elremaly W, Caraus I, Godbout C, Leveau C, Chalder L, Beaudin C, Kanamaru E, Kosovskaia R, Lauzon S, Maillet Y, Franco A, Lascau-Coman V, Bouhanik S, Gaitan YP, Li D, and Moreau A
- Subjects
- Biomarkers blood, Fatigue Syndrome, Chronic etiology, Female, Humans, Male, Middle Aged, Severity of Illness Index, Circulating MicroRNA blood, Fatigue Syndrome, Chronic diagnosis, Fatigue Syndrome, Chronic genetics
- Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex chronic disease, rooted in multi-system dysfunctions characterized by unexplained debilitating fatigue. Post-exertional malaise (PEM), defined as the exacerbation of the patient's symptoms following minimal physical or mental stress, is a hallmark of ME/CFS. While multiple case definitions exist, there is currently no well-established biomarkers or laboratory tests to diagnose ME/CFS. Our study aimed to investigate circulating microRNA expression in severely ill ME/CFS patients before and after an innovative stress challenge that stimulates PEM. Our findings highlight the differential expression of eleven microRNAs associated with a physiological response to PEM. The present study uncovers specific microRNA expression signatures associated with ME/CFS in response to PEM induction and reports microRNA expression patterns associated to specific symptom severities. The identification of distinctive microRNA expression signatures for ME/CFS through a provocation challenge is essential for the elucidation of the ME/CFS pathophysiology, and lead to accurate diagnoses, prevention measures, and effective treatment options.
- Published
- 2020
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41. Self-reported cognition and marijuana use in older adults: Results from the national epidemiologic survey on alcohol and related conditions-III.
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Benitez A, Lauzon S, Nietert PJ, McRae-Clark A, and Sherman BJ
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- Adult, Aged, Cognition, Cross-Sectional Studies, Humans, Middle Aged, Self Report, Marijuana Abuse epidemiology, Marijuana Smoking, Marijuana Use epidemiology, Substance-Related Disorders
- Abstract
Marijuana use among older adults is on an unprecedented rise, yet little is known about its effects on cognition in this population where, due to advanced age, risk for cognitive decline is high. Thus, we investigated whether marijuana use and use characteristics were associated with self-reported cognition among older adults ages ≥ 50 years using the National Epidemiologic Survey on Alcohol and Related Conditions-III. Respondents either had never used marijuana ("never": n = 10,976), used but not in the past 12 months ("former": n = 2990), or used in the past 12 months ("current": n = 712). Self-reported cognition was measured using the Executive Function Index. Marijuana and substance use characteristics were obtained using the Alcohol Use Disorder and Associated Disabilities Interview Schedule-5. Covariates included demographics, mental health and disability, and comorbid mental and substance use disorder. Using general linear models of cross-sectional data, we found that current users, particularly those with cannabis use disorder, reported worse cognition than never or former users, but these effects were small in magnitude. Among both former and current users, greater duration of past use was associated with worse cognition. Frequent use within the past 12 months was associated with worse cognition among current users, but daily users reported better cognition compared to monthly or weekly users. Thus, marijuana use may impact self-reported cognition in older adulthood, although these effects may be subtle, specific to particular use characteristics, and possibly affected by self-awareness of deficits. Future work using objective measures such as neuropsychological testing or neuroimaging may better elucidate these effects., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Published
- 2020
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42. Corrigenda: A biodiversity hotspot for Microgastrinae (Hymenoptera, Braconidae) in North America: annotated species checklist for Ottawa, Canada.
- Author
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Lauzon S and Fernandez-Triana J
- Abstract
[This corrects the article DOI: 10.3897/zookeys.633.10480.].
- Published
- 2020
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43. The effects of obesity on plastic and reconstructive surgical outcomes.
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Crane DP, Inglesby D, Lauzon S, Carrol EA, and Herrera FA
- Subjects
- Humans, Retrospective Studies, Treatment Outcome, Obesity complications, Postoperative Complications epidemiology, Postoperative Complications etiology, Plastic Surgery Procedures
- Abstract
Competing Interests: Declaration of Competing Interest The authors declare no conflict of interest.
- Published
- 2020
- Full Text
- View/download PDF
44. An Exploration of Useful Telemedicine-Based Resources for Clinical Research.
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Bunnell BE, Sprague G, Qanungo S, Nichols M, Magruder K, Lauzon S, Obeid JS, Lenert LA, and Welch BM
- Subjects
- Humans, Research Design, Research Personnel, Surveys and Questionnaires, Clinical Trials as Topic, Informed Consent, Telemedicine
- Abstract
Background: Clinical trials are key to ensuring high-quality, effective, and safe health care interventions, but there are many barriers to their successful and timely implementation. Difficulties with participant recruitment and enrollment are largely affected by difficulties with obtaining informed consent. Teleconsent is a telemedicine- based approach to obtaining informed consent and offers a unique solution to limitations of traditional consent approaches. Methods: We conducted a survey among 134 clinical trial researchers in academic/university-, industry-, and clinically based settings. The survey addressed important aspects of teleconsent, potential teleconsent enhancements, and other telehealth capabilities to support clinical research. Results: The majority of respondents viewed teleconsent as an important approach for obtaining informed consent and indicated that they would likely use teleconsent if available. Consenting participants at remote sites, increasing access to clinical trials, and consenting participants in their homes were viewed as the greatest opportunities for teleconsent. Features for building, validating, and assessing understanding of teleconsent forms, mobile capabilities, three-way teleconsent calls, and direct links to forms via recruitment websites were viewed as important teleconsent enhancements. Other telehealth capabilities to support clinical research, including surveys, file transfer, three-way video, screenshare, and photo capture during telemedicine visits, and proposed telemedicine capabilities such as video call recording, ID information capture, and integration of medical devices, were also viewed as important. Conclusions: Teleconsent and telemedicine are promising solutions to some common challenges to clinical trials. Many barriers to study recruitment and enrollment might be overcome by investing time and resources and further evaluating this technology.
- Published
- 2020
- Full Text
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45. Detection and Characteristics of Temporal Encephaloceles in Patients with Refractory Epilepsy.
- Author
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Campbell ZM, Hyer JM, Lauzon S, Bonilha L, Spampinato MV, and Yazdani M
- Subjects
- Adolescent, Adult, Drug Resistant Epilepsy etiology, Electroencephalography, Epilepsy, Temporal Lobe etiology, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Retrospective Studies, Drug Resistant Epilepsy diagnostic imaging, Encephalocele complications, Encephalocele diagnostic imaging, Epilepsy, Temporal Lobe diagnostic imaging
- Abstract
Background and Purpose: Temporal encephaloceles are increasingly visualized during neuroimaging assessment of individuals with refractory temporal lobe epilepsy, and their identification could indicate an intracranial abnormality that may be related to a potential seizure focus. Careful review by an experienced neuroradiologist may yield improved detection of TEs, and other clinical, neurophysiologic, and radiologic findings may predict their presence., Materials and Methods: Data were reviewed retrospectively in patients at our institution who were presented at a multidisciplinary conference for refractory epilepsy between January 1, 2010, and December 31, 2016. Clinical, neurophysiologic, and imaging data were collected. An expert neuroradiologist reviewed the latest MR imaging of the brain in patients for whom one was available, noting the presence or absence of temporal encephaloceles as well as other associated imaging characteristics., Results: A total of 434 patients were reviewed, 16 of whom were excluded due to unavailable or poor-quality MR imaging. Seven patients had temporal encephaloceles reported on initial imaging, while 52 patients had temporal encephaloceles identified on expert review. MR imaging findings were more often initially normal in patients with temporal encephaloceles ( P < .001), and detection of temporal encephaloceles was increased in patients in whom 3T MR imaging was performed ( P < .001), the T2 sampling perfection with application-optimized contrasts by using different flip angle evolutions sequence was used ( P < .001), or the presence of radiologic findings suggestive of idiopathic intracranial hypertension was noted. Seizure onset by scalp electroencephalogram among patients with temporal encephaloceles was significantly more likely to be temporal compared with patients without temporal encephaloceles ( P < .001). A significant correlation between intracranial electroencephalogram seizure onset and patients with temporal encephaloceles compared with patients without temporal encephaloceles was not observed, though there was a trend toward temporal-onset seizures in patients with temporal encephaloceles ( P = .06)., Conclusions: Careful review of MR imaging in patients with refractory temporal lobe epilepsy by a board-certified neuroradiologist with special attention paid to a high-resolution T2 sequence can increase the detection of subtle temporal encephaloceles, and certain clinical and neurophysiologic findings should raise the suspicion for their presence., (© 2018 by American Journal of Neuroradiology.)
- Published
- 2018
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46. Asymmetric Fe II -Catalyzed Thia-Michael Addition Reaction to α,β-Unsaturated Oxazolidin-2-one Derivatives.
- Author
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Lauzon S, Keipour H, Gandon V, and Ollevier T
- Abstract
A highly enantioselective Fe
II -catalyzed thia-Michael addition to α,β-unsaturated carbonyl derivatives was developed. The scope of the reaction was demonstrated with a selection of aromatic, heterocyclic and aliphatic thiols, and various Michael acceptors. The corresponding β-thioethers were obtained in good to excellent yields (up to 98%) and moderate to excellent enantioselectivities (up to 96:4 er). Unusual hepta-coordination of the metal and chelation to α,β-unsaturated oxazolidin-2-one derivatives allowed the construction of a coherent model rationalizing the enantioselective event. DFT calculations support the proposed model for observed stereoselectivities.- Published
- 2017
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47. Adding physical therapy services in the emergency department to prevent immobilization syndrome - a feasibility study in a university hospital.
- Author
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Tousignant-Laflamme Y, Beaudoin AM, Renaud AM, Lauzon S, Charest-Bossé MC, Leblanc L, and Grégoire M
- Subjects
- Aged, Feasibility Studies, Female, Geriatric Assessment, Humans, Male, Nursing Staff, Hospital organization & administration, Prognosis, Prospective Studies, Syndrome, Emergency Service, Hospital organization & administration, Hospitals, University organization & administration, Immobilization adverse effects, Physical Therapy Modalities organization & administration
- Abstract
Background: The association between the functional decline occurring with bedrest and hospitalization in older persons is well-known. A long wait in the emergency department (ED), where patients can be bedridden, is a risk factor for the development of an immobilization syndrome (IS). IS is one of the unwanted consequences of inactivity, which causes pathological changes in most organs and systems. Early mobility interventions, such as physical therapy (PT) delivered in the ED, may prevent its development. To our knowledge, no prior studies have reported on this topic. The goal of this study was to (i) assess the feasibility and (ii) explore the potential clinical value of adding PT services to the ED, in collaboration with nursing staff, to prevent IS., Methods: For 12 weeks, PT services were delivered in the ED to older persons (>65 years old) presenting with ≥1 clinical signs associated with the development of IS. Patients were screened by ED nurses and then seen by the physiotherapist. In order to assess feasibility, access to patients, percentage of patients who met eligibility criteria, acceptability of the intervention, and barriers/facilitators to the implementation were measured. To describe the clinical benefits of early PT services, we counted the number of new IS cases among patients after their admission to the ward., Results: After 12 weeks, the ED nurses screened 187 potential patients and 20 received PT services in the ED (before their admission to the ward). Accessibility was not an issue and we observed good acceptability from the milieu. We did not find majors problems or insurmountable obstacles to implementation of the intervention. Clinical outcomes showed that nine patients received PT treatments in the ED and on the ward (after their admission). For the 11 other patients, no PT interventions were done in the ED following the assessment. Follow-up of these 11 patients showed that two of them developed IS during their hospital stay. As for the nine patients who began PT treatments in the ED, none of them developed IS., Conclusion: Based on the results of this feasibility study, it would be likely and potentially beneficial to implement PT services in the ED, which could have a positive impact on preventing the development of IS in older persons presenting risk factors. While only a small proportion of patients (11 %) received PT services, better screening tools/methods should be developed.
- Published
- 2015
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48. Health services for linguistic minorities in a bilingual setting: challenges for bilingual professionals.
- Author
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Drolet M, Savard J, Benot J, Arcand I, Savard S, Lagacé J, Lauzon S, and Dubouloz CJ
- Subjects
- Female, Focus Groups, Health Services Research, Humans, Male, Ontario, Qualitative Research, Social Work, Communication Barriers, Cultural Competency, Health Services Accessibility, Minority Groups, Multilingualism, Professional-Patient Relations
- Abstract
We explore in this qualitative research the challenges faced by bilingual health and social services professionals in a Canadian bilingual setting, as well as the strategies used to overcome them. Eight focus groups were conducted with a total of 43 bilingual Francophone professionals who offered services in French in 21 health and social service organizations in eastern Ontario, Canada. We highlight linguistic issues affecting a minority Francophone clientele, the shortage of services in French, and organizational issues within these agencies. The solutions that the professionals adopt for better serving the clients and overcoming these challenges focus on adapting services from linguistic angles. In the long term, such an enhanced approach can affect staff well-being. Ensuring access to services for linguistic minority populations and the active offer of same should not rest solely on the shoulders of such professionals, but rather on organizational strategies.
- Published
- 2014
- Full Text
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49. Renin inhibitors for the treatment of hypertension: design and optimization of a novel series of tertiary alcohol-bearing piperidines.
- Author
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Chen A, Cauchon E, Chefson A, Dolman S, Ducharme Y, Dubé D, Falgueyret JP, Fournier PA, Gagné S, Gallant M, Grimm E, Han Y, Houle R, Huang JQ, Hughes G, Jûteau H, Lacombe P, Lauzon S, Lévesque JF, Liu S, Macdonald D, Mackay B, McKay D, Percival MD, St-Jacques R, and Toulmond S
- Subjects
- Alcohols chemistry, Alcohols therapeutic use, Animals, Antihypertensive Agents chemistry, Molecular Structure, Piperidines chemistry, Piperidines therapeutic use, Rats, Renin chemistry, Structure-Activity Relationship, Alcohols chemical synthesis, Antihypertensive Agents chemical synthesis, Antihypertensive Agents therapeutic use, Drug Design, Hypertension drug therapy, Piperidines chemical synthesis, Renin antagonists & inhibitors
- Abstract
The design and optimization of a novel series of renin inhibitor is described herein. Strategically, by committing the necessary resources to the development of synthetic sequences and scaffolds that were most amenable for late stage structural diversification, even as the focus of the SAR campaign moved from one end of the molecule to another, highly potent renin inhibitors could be rapidly identified and profiled., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
- Full Text
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50. Performance of humans vs. exploration algorithms on the Tower of London Test.
- Author
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Fimbel E, Lauzon S, and Rainville C
- Subjects
- Aged, Algorithms, Attention, Behavior, Female, Humans, Male, Memory, Neuropsychological Tests, Programming Languages, Reaction Time, Software, Artificial Intelligence, Cognition, Problem Solving
- Abstract
The Tower of London Test (TOL) used to assess executive functions was inspired in Artificial Intelligence tasks used to test problem-solving algorithms. In this study, we compare the performance of humans and of exploration algorithms. Instead of absolute execution times, we focus on how the execution time varies with the tasks and/or the number of moves. This approach used in Algorithmic Complexity provides a fair comparison between humans and computers, although humans are several orders of magnitude slower. On easy tasks (1 to 5 moves), healthy elderly persons performed like exploration algorithms using bounded memory resources, i.e., the execution time grew exponentially with the number of moves. This result was replicated with a group of healthy young participants. However, for difficult tasks (5 to 8 moves) the execution time of young participants did not increase significantly, whereas for exploration algorithms, the execution time keeps on increasing exponentially. A pre-and post-test control task showed a 25% improvement of visuo-motor skills but this was insufficient to explain this result. The findings suggest that naive participants used systematic exploration to solve the problem but under the effect of practice, they developed markedly more efficient strategies using the information acquired during the test.
- Published
- 2009
- Full Text
- View/download PDF
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