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Marchand A, Ménard J, Brochu P, Haddad S. Modeling the impact of heat stress on the toxicokinetics of toluene and acetone. Arch Toxicol 2024; 98:471-479. [PMID: 38127129 DOI: 10.1007/s00204-023-03646-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023]
Abstract
Many workers can be exposed simultaneously to heat and volatile chemicals. In a controlled human exposure study, it was observed that an increase in ambient temperature was associated with increased blood concentrations for acetone and toluene. Based on the expected changes in physiological parameters that occur with an increase in ambient temperature, we aimed to develop a PBPK model for acetone and toluene that could account for the impact of temperature on the kinetics of these solvents. Changes in temperature-dependent physiological parameters (i.e. blood flows, cardiac output, alveolar ventilation) based on recent measurements in volunteers were introduced in the PBPK models to simulate observed blood concentrations for different temperature exposure conditions. Because initial simulations did not adequately predict solvent kinetics at any temperature, the most sensitive parameter (alveolar ventilation; Qp) was, therefore, optimized on experimental acetone blood concentrations to obtain a relationship with temperature. The new temperature-dependent Qp relationship gave Qp values consistent with the literature and estimated a mean increase of 19% at 30 °C (wet bulb globe temperature) compared to 21 °C. The integration of a new temperature-dependent Qp relationship in the PBPK toluene model yielded adequate simulations of the experimental data for toluene in blood, exhaled air and urine. With further validation with other solvents, the temperature-dependant PBPK model could be a useful tool to better assess the risks of simultaneous exposure to volatile chemicals and heat stress and interpret biomonitoring data in workers as well as in the general population. TRN: NCT02659410, Registration date: January 15, 2016.
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Herbreteau JB, Tavernier E, Joly A, Marchand A, Édée AÉ, Tauveron V, Maruani A. Traditional healers or bonesetters ("rebouteux") in France: A survey of their practice, profile, and customers. Ann Dermatol Venereol 2023:S0151-9638(22)00120-X. [PMID: 36653226 DOI: 10.1016/j.annder.2022.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/18/2022] [Accepted: 11/17/2022] [Indexed: 01/18/2023]
Abstract
BACKGROUND In France, many people consult "bonesetters" for several medical reasons. Little is known about them. We aimed to investigate the practices of traditional healers in France as well as their profile and that of their customers. METHODS This was a survey carried out in Metropolitan France. A 33-item questionnaire developed by a multidisciplinary group was sent to a sample of 148 traditional healers found on the Internet and by word of mouth. RESULTS Of the 148 questionnaires sent, 89 (60.1 %) were returned and 67 (45.3 %) were analyzed: 51.5 % (n = 34) of respondents were men, and the mean (±standard deviation) age was 51.6 ± 11.6 years. The respondents considered that they had received a gift of healing and were mainly magnetic healers (68.2 %). They became aware of this gift at a mean age of 19.9 ± 14.1 years. The traditional healers practiced mainly in rural areas (54.5 %), at home (59.1 %), and used their hands to transmit energy (95.5 %). They advertised their practice mainly by word of mouth (89.4 %) and had a predominantly female clientele (78.1 %). Various diseases were treated, with the most frequent being subjective complaints (pain, stress, fatigue, insomnia) and dermatological complaints (eczema, accidental and post-herpes-zoster burns, psoriasis, and warts). Most respondents considered their activities to be complementary to conventional medicine, and 10.9 % considered them more effective. Some indicated that they did not consider themselves "healers" but rather "providers of relief". DISCUSSION The results of this survey provide a better understanding of this network of local care that revolves around medicine.
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Robert J, Marchand A, Mazereeuw-Hautier J, Boccara O, Martin L, Chiaverini C, Beneton N, Vabres P, Balguerie X, Plantin P, Bessis D, Barbarot S, Dadban A, Droitcourt C, Samimi M, Morel B, Caille A, Maruani A, Leducq S. Quality of life of children with capillary malformations of the lower limbs: Evolution and associated factors. Data from the French national paediatric cohort, CONAPE. Ann Dermatol Venereol 2022; 149:271-275. [PMID: 35810006 DOI: 10.1016/j.annder.2022.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 02/16/2022] [Accepted: 03/30/2022] [Indexed: 01/19/2023]
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Marchand A, Caille A, Gissot V, Giraudeau B, Lengelle C, Bourgoin H, Largeau B, Leducq S, Maruani A. Topical sirolimus solution for lingual microcystic lymphatic malformations in children and adults (TOPGUN): study protocol for a multicenter, randomized, assessor-blinded, controlled, stepped-wedge clinical trial. Trials 2022; 23:557. [PMID: 35804404 PMCID: PMC9270761 DOI: 10.1186/s13063-022-06365-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 04/28/2022] [Indexed: 11/24/2022] Open
Abstract
Background Lingual microcystic lymphatic malformations (LMLMs) are rare congenital vascular malformations presenting as clusters of cysts filled with lymph fluid or blood. Even small well-limited lesions can be responsible for a heavy burden, inducing pain, aesthetic prejudice, or oozing, bleeding, infections. The natural history of LMLMs is progressive worsening punctuated by acute flares. Therapeutic options include surgery, laser excision, and radiofrequency ablation but all are potentially detrimental and expose to local relapse. Therefore, the management frequently relies on a “watchful waiting” approach. In complicated LMLMs, treatment with oral sirolimus, a mammalian target of rapamycin (mTOR) inhibitor, is often used. Topical applications of sirolimus on the buccal mucosae have been reported in other oral diseases with good tolerance and none to slight detectable blood sirolimus concentrations. We aim to evaluate the efficacy and safety of a 1 mg/mL sirolimus solution applied once daily on LMLM of any stage in children and adults after 4, 8, 12, 16, 20, and 24 weeks of treatment compared to usual care (no treatment). Methods This is a randomized, multicentric study using an individually randomized stepped-wedge design over 24 weeks to evaluate topical application of a 1 mg/mL sirolimus solution once daily, on LMLM, versus usual care (no treatment), the control condition. Participants begin with an observational period and later switch to the intervention at a randomized time (week 0, 4, 8, or 12). Visits occur every 4 weeks, either in the study center or by teleconsulting. The primary outcome will be the evaluation of global severity of the LMLM on monthly standardized photographs by 3 independent blinded experts using the physical global assessment (PGA) 0 to 5 scale. Secondary outcomes will include lesion size measurement and quality of life assessment, investigator, and patient-assessed global disease and specific symptoms (oozing, bleeding, sialorrhea, eating impairment, taste modification, aesthetic impairment, pain, and global discomfort) assessment. A biological monitoring will be performed including residual blood sirolimus concentration and usual laboratory parameters. Discussion Given the disappointing state of current treatment options in LMLMs, topical sirolimus could become firstline therapy in treating LMLMs if its efficacy and safety were to be demonstrated. Trial registration ClinicalTrials.gov NCT04128722. Registered on 24 September 2019. EudraCT: EUCTR2019-001530-33-FR Sponsor (University Hospital Center of Tours – CHRU Tours): DR190041-TOPGUN French regulatory authorities: ID RCB: 2019-001530-33 Supplementary Information The online version contains supplementary material available at 10.1186/s13063-022-06365-y.
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Mantelli MI, Roques BB, Blanchard TA, Mounier M, Quincey M, Jolivet FB, Jousserand NP, Marchand A, Diquélou AN, Reynolds BS, Coyne M, Trumel C, Lefebvre HP, Concordet D, Lavoué R. Short course of immune-suppressive doses of prednisolone, evaluated through a prospective double-masked placebo-controlled clinical trial in healthy Beagles, is associated with sustained modifications in renal, hydration, and electrolytic status. Am J Vet Res 2022; 83:434-442. [PMID: 35175932 DOI: 10.2460/ajvr.21.09.0150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the effects and duration of orally administered prednisolone on renal function evaluated by glomerular filtration rate (GFR) determination and creatinine (Cr) and symmetric dimethylarginine (SDMA) concentrations as well as on urinalysis, electrolytes, and hydric status in healthy dogs. ANIMALS 14 healthy Beagles. PROCEDURES In this prospective double-masked placebo-controlled study, dogs were randomized after baseline evaluation to receive a 7-day course of either prednisolone (1.5 to 2.0 mg/kg, PO, q 12 h) or a placebo. A repeated-measure design was performed, each dog participating in 4 successive sampling sessions. Clinical data, systolic blood pressure, CBC, and biochemical analyses including serum SDMA concentration, GFR determination, urine output quantification, and complete urinalysis were performed for all dogs the day before (D0) and at the end of steroid administration (D7) as well as 2 weeks (D21) and 4 weeks (D35) after the end of treatment. RESULTS At D7, when compared with baseline, GFR increased significantly in treated dogs, whereas creatinine and SDMA concentrations decreased significantly. GFR and Cr but not SDMA modifications persisted significantly at D21. None of the variables differed significantly from baseline at D35. The OR of presenting an albumin band on urine electrophoresis was 2.4 times as high in treated versus control dogs (OR, 36; 95% CI, 1.8 to 719.4; P = 0.02). CLINICAL RELEVANCE A short-term course of immune-suppressive prednisolone treatment in healthy dogs leads to a sustained but reversible renal hyperfiltration state. Modification in electrolytic variables can affect the clinical interpretation of blood work in such patients.
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Poulin P, Marchand A, Lévesque B, Dubé M, Aubin D, Ouazia B, Duchaine C, Brisson M. Impact of improved indoor air quality in Nunavik homes on children's respiratory health. INDOOR AIR 2022; 32:e13009. [PMID: 35225380 DOI: 10.1111/ina.13009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/05/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
Between 2007 and 2012, hospitalization rate related to respiratory system diseases in children ≤1-year-old was near 7 times higher in Nunavik compared with the whole province of Quebec. To assess the impact of poor indoor air quality (IAQ) in residential environments on children's respiratory health, the Nunavik's intervention study investigated the impact of the optimization of ventilation systems on the incidence rates of respiratory infections in children in Nunavik. Children under 10 years were recruited and categorized according to the type of ventilation system in their home: energy recovery ventilator (ERV), heat recovery ventilator (HRV), no HRV or ERV, and control groups. Children's' medical records were analyzed over a period of 50 weeks pre- and post-intervention. Clinical diagnoses were classified into 4 categories: upper respiratory infections, lower respiratory infections, otitis media, and asthma. A decrease in respiratory infections episodes was observed in all groups following intervention with the highest impact observed for HRV systems (-53.0%). Decreases in the ERV group were not significant (-21,7%) possibly due to the presence of some volatile organic compound (such as propylene glycol) and inerrant experimental bias. Nevertheless, no significant association was found between health episodes incidence and household's behaviors or IAQ.
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Marchand A, Ménard J, Brochu P, Haddad S. Impact of heat on biological concentrations of toluene and acetone resulting from exposure by inhalation: A pilot study. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 88:103737. [PMID: 34481063 DOI: 10.1016/j.etap.2021.103737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
Climatic conditions raise new concerns about the potential impact of heat on the absorption and kinetics of certain chemicals. The impact of 3 temperatures (21, 25 and 30 °C WBGT) on the toxicokinetics of toluene and acetone was therefore evaluated in five human subjects during controlled exposures in an inhalation chamber. Biological samples were collected and analyzed by GC-MS/MS. Increases between 4 and 85 % were observed for solvents concentrations in blood (30 vs 21 °C) while decreases in urine samples for acetone and o-cresol were measured at the end of the exposure period (4 h). Mean blood concentrations at 4 h are well correlated with temperature. Results suggest an increased absorption and/or a decreased elimination of volatile chemicals in the presence of heat. Higher increases of blood chemical concentrations were observed in heavier individuals. Further studies should include physiologically based toxicokinetic models to help in better understanding the mechanisms involved and their respective contribution.
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Bilodeau J, Marchand A, Demers A. [Work, family, resources and unequal levels of psychological distress between working men and working women : vulnerability or gendered expression of stress?]. Rev Epidemiol Sante Publique 2021; 69:337-344. [PMID: 34393031 DOI: 10.1016/j.respe.2021.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/29/2021] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION This study aims to compare the vulnerability hypothesis and the expression hypothesis to explain a greater level of psychological distress among working women than among working men. METHOD The two hypotheses were contrasted by integrating work stressors, family stressors, work-family conflicts and psychosocial resources. The conceptual models were tested by using multilevel path analyses on 2026 employees in Quebec (Canada) based in 63 work establishments. RESULTS Results partially supported both hypotheses. According to the vulnerability hypothesis, single parenting, child-related problems and self-esteem were indirectly involved in the variation of psychological distress among women through family-to-work, otherwise known as work-family conflict. According to the expression hypothesis, although family-to-work conflict was closely associated with more psychological distress among women, this stressor was also closely associated with higher at-risk alcohol consumption among men. Couple-related problems and a sense of control likewise played a role in the expression mechanism through family-to-work conflict. CONCLUSION These results underline the importance of considering that gender contributes to mental health inequalities through multiple mechanisms. They also call for a distinction between the two directions of work-family conflict as gendered mediators.
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Martin L, Ericsson M, Marchand A. Multiplexed detection of Agents Affecting Erythropoiesis (AAEs) and overall strategy for optimizing initial testing procedure. Drug Test Anal 2021; 13:1791-1796. [PMID: 34342157 DOI: 10.1002/dta.3136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/25/2021] [Accepted: 07/28/2021] [Indexed: 11/06/2022]
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Brochu P, Ménard J, Marchand A, Haddad S. Cardiopulmonary values and organ blood flows before and during heat stress: data in nine subjects at rest in the upright position. Can J Physiol Pharmacol 2021; 99:1148-1158. [PMID: 34062083 DOI: 10.1139/cjpp-2021-0044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Physiological changes associated with thermoregulation can influence the kinetics of chemicals in the human body, such as alveolar ventilation (VA) and redistribution of blood flow to organs. In this study, the influence of heat stress on various physiological parameters was evaluated in nine male volunteers during sessions of exposure to wet blub globe temperatures (WBGT) of 21, 25 and 30°C for four hours. Skin and core temperatures and more than twenty cardiopulmonary parameters were measured. Liver, kidneys, brain, skin and muscles blood flows were also determined based on published measurements. Results show that most subjects (8 out of 9) have been affected by the inhalation of hot and dry air at the WBGT of 30°C. High respiratory rates, superficial tidal volumes and low VA values were notably observed. The skin blood flow has increased by 2.16-fold, whereas the renal blood flow and liver blood flow have decreased by about by 11 and 18% respectively. A complete set of key cardiopulmonary parameters in healthy male adults before and during heat stress was generated for use in PBPK modeling. A toxicokinetic studies are ongoing to evaluate the impact of heat stress on the absorption, biotransformation and excretion rates of volatile xenobiotics.
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Kammogne CL, Marchand A. [Ethnicity and immigration status: How are they associated with work and depressive symptoms?]. Rev Epidemiol Sante Publique 2021; 69:145-153. [PMID: 33744031 DOI: 10.1016/j.respe.2021.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 09/15/2020] [Accepted: 01/19/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND The purpose of this research is to determine whether, in the Canadian workforce, cultural identity traits, particularly ethnicity and immigrant status, might modify the association of work with depressive symptoms. METHOD Data were derived from the nine cycles of the National Population Health Survey (NPHS) conducted by Statistics Canada. Based on a sample of 6477 workers, multilevel regression models were brought into being. Analyses were adjusted for family-related factors, non-work social support, and personal characteristics. RESULTS After accounting for potential confounders, ethnicity and work-related factors were distinctly and directly associated with depressive symptoms. Workers belonging to visible minorities had significantly fewer depressive symptoms than their Caucasian counterparts. Unlike Caucasians, they were more often overqualified, less in a position to use their skills, and largely without decision-making authority. On the other hand, all analyses having to do with immigrant status led to inconclusive results. CONCLUSION Ethnicity seems to have some bearing on the association of work with depressive symptoms among members of the Canadian workforce. It might be beneficial to carry out targeted interventions aimed at improving working conditions according to ethnicity and situations involving professional overqualification.
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Robert J, Marchand A, Mazereeuw-Hautier J, Boccara O, Martin L, Chiaverini C, Beneton N, Vabres P, Balguerie X, Plantin P, Bessis D, Barbarot S, Dadban A, Droitcourt C, Morel B, Leducq S, Samimi M, Caille A, Maruani A. Qualité de vie chez les enfants ayant une malformation capillaire de membre inférieur : données dynamiques sur 5 ans (cohorte nationale multicentrique CONAPE). Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Marchand A, Castaigne E, de Suremain F, Valderrama O, Sommier G, Agostini H, Hardy P. Veille sanitaire et réseau de santé mentale dans la prise en charge des suicidants. Résultats d’une étude contrôlée. Eur Psychiatry 2020. [DOI: 10.1016/j.eurpsy.2013.09.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Une étude prospective, contrôlée et randomisée a été réalisée sur 320 suicidants ayant regagné leur domicile après passage au SAU de Bicêtre. Elle a comparé le protocole de prise en charge habituel (groupe G1) au protocole « OSTA » (G2). Celui-ci comporte trois appels téléphoniques au patient (à j8–j15, M1 et M3) 2,3, un appel téléphonique au professionnel référent (M3) et la mise à disposition d’un numéro d’appel téléphonique pour le patient et son référent. Une évaluation téléphonique finale à un an (M12) a été effectuée dans les deux groupes.Résultats:– le taux d’adhésion aux rappels téléphonique est important. Un contact téléphonique a été établi dans 85,5 % des cas à j8–j15, 80,9 % des cas à M1 et 72,4 % des cas à j8–j15 et à M1 ;– le taux de récidive suicidaire à un an ne diffère significativement pas entre G1 et G2 : 14,5 % vs 14,0 % (analyse en « intention de traiter »), 14,5 % vs 11,5 % (analyse « per protocole ») ;– l’initiation d’un suivi ambulatoire (ISA), au plus tard dans le mois suivant le mois de la TS, ne diffère également pas entre les deux groupes : 31,0 % (G1) vs 24,2 % (G2) ;– il existe une forte perte d’information lors du recueil à M12.Dans le groupe G2, la prise en compte de l’ensemble des données collectées à j8–j15, M1, M3 et M12, montre un taux de récidive suicidaire de 19,4 % (vs 14,0 % selon les seules données M12), mais aussi un taux d’ISA de 70,6 % (vs 24,2 %).Discussion et conclusionCes résultats sont confrontés aux données récentes de la littérature [1]. La discussion porte sur la méthodologie la plus appropriée à l’évaluation des effets de la veille sanitaire et aux moyens de contrôler les effets de l’évaluation sur les variables étudiées.
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Marchand A, Roulland I, Semence F, Audran M. Volumetric Absorptive Microsampling (VAMS) technology for IGF-1 quantification by automated chemiluminescent immunoassay in dried blood. Growth Horm IGF Res 2020; 50:27-34. [PMID: 31835105 DOI: 10.1016/j.ghir.2019.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/23/2019] [Accepted: 12/06/2019] [Indexed: 01/06/2023]
Abstract
For medical diagnostics and anti-doping analyses, insulin-like growth factor 1 (IGF-1) can be measured in serum using automated chemiluminescent immunoassays. The aim of this study was to assess the feasibility of using dried blood instead of serum to measure IGF-1 concentrations with an automated IGF-1 immunoassay and to evaluate if IGF-1 concentrations from dried capillary blood and serum were comparable. Blood samples (venous blood and capillary blood obtained from the arm skin using a device from Seventh Sense Biosystem) were collected with 20 μL Volumetric Absorptive Micro samplers (VAMS) (Mitra®, Neoteryx). These samplers offer the possibility of collecting a fixed volume of blood without perturbation by hematocrit. Starting from dried blood, an aqueous desorption in 0.9% NaCl was efficient to release IGF-1. The solution was directly analyzed on the automated IGF-1 immunoassay. IGF-1 concentrations after extraction from VAMS were lower than in serum (due to the dilution performed for the elution of IGF-1) but measurable for serum concentrations over 50 ng/mL. In addition, IGF-1 on VAMS was stable for at least one month at room temperature. Following adjustment for dilution, serum and dried blood IGF-1 concentrations were of the same order. However lower concentrations were obtained from the capillary blood in particular for high serum concentrations. In conclusion, a micro volume of dried capillary blood could be used to quantify IGF-1 with an automated chemiluminescent immunoassay. However, more data are needed to establish specific IGF-1 reference concentrations using dried capillary blood instead of serum.
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Marchand A, Blanc ME, Beauregard N. Do age and gender contribute to workers' burnout symptoms? Occup Med (Lond) 2019; 68:405-411. [PMID: 29912439 DOI: 10.1093/occmed/kqy088] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background Despite mounting evidence on the association between work stress and burnout, there is limited knowledge about the extent to which workers' age and gender are associated with burnout. Aims To evaluate the relationship between age, gender and their interaction with burnout in a sample of Canadian workers. Methods Data were collected in 2009-12 from a sample of 2073 Canadian workers from 63 workplaces in the province of Quebec. Data were analysed with multilevel regression models to test for linear and non-linear relationships between age and burnout. Analyses adjusted for marital status, parental status, educational level and number of working hours were conducted on the total sample and stratified by gender. Results Data were collected from a sample of 2073 Canadian workers (response rate 73%). Age followed a non-linear relationship with emotional exhaustion and total burnout, while it was linearly related to cynicism and reduced professional efficacy. Burnout level reduced with increasing age in men, but the association was bimodal in women, with women aged between 20-35 and over 55 years showing the highest burnout level. Conclusions These results suggest that burnout symptoms varied greatly according to different life stages of working men and women. Younger men, and women aged between 20-35 and 55 years and over are particularly susceptible and should be targeted for programmes to reduce risk of burnout.
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Marchand A, Tallet A, Collin C, Cormier B, Venel Y, Miquelestorena-Standley E, Machet L. Une mutation rare du gène b-Raf T599dup conférant une sensibilité à la bithérapie par BRAFi et MEKi chez un patient atteint de mélanome métastatique. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Marchand A, Tallet A, Collin C, Cormier B, Venel Y, Miquelestorena-Standley E, Machet L. A rare BRAF T599dup mutation conferring sensitivity to BRAF inhibitor in a patient with metastatic melanoma. Br J Dermatol 2018; 179:528-529. [PMID: 29494756 DOI: 10.1111/bjd.16499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Martin L, Zouhiri N, Audran M, Marchand A. A validated, sensitive electrophoretic method for the detection of activin receptor type II-Fc fusion proteins in human blood. Drug Test Anal 2018; 10:1226-1236. [PMID: 29499588 DOI: 10.1002/dta.2376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 02/20/2018] [Accepted: 02/21/2018] [Indexed: 01/13/2023]
Abstract
New therapeutic proteins that trap circulating members of the transforming growth factor (TGF) beta superfamily (activins and growth differentiation factors) show promising effects on erythropoiesis and muscular growth. They are dimeric recombinant fusion proteins composed of the extracellular domain of a human activin receptor (ActRIIA or IIB) linked to the Fc part of human IgG1. Sotatercept (ActRIIA-Fc) and Luspatercept (a modified ActRIIB-Fc) in particular are now in phase 2/3 of clinical trials against anemia and included in the prohibited list established by the World Anti-Doping Agency. To prevent a potential misuse by athletes in the near future, a robust and sensitive method of detection is needed. We validated an approach adapted from an electrophoretic method used for the detection of recombinant erythropoietins that allowed detection of various ActRIIA-Fc and ActRIIB-Fc proteins, including variants produced in different cell types, after a single immuno-extraction step. After separation by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), an initial testing procedure performed by single-blotting can indicate the presence of an ActRII-Fc (indifferently type IIA or IIB). A confirmation performed by double-blotting using different antibodies for detection allows a more precise identification of the type of ActRII-Fc (IIA, IIB). Starting from a few hundred microliters of serum or plasma, this method is specific, sensitive, and easy to perform. It could easily be adopted by anti-doping laboratories.
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Marchand A, Haddad S. Simultaneous exposures to heat and chemicals and the impact on toxicokinetics and biomonitoring. CURRENT OPINION IN TOXICOLOGY 2017. [DOI: 10.1016/j.cotox.2017.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Delalu H, Marchand A. Modélisation générale des processus réactionnels Intervenant au cours de la synthèse de la diméthylhydrazine asymétrique par le procédé Raschig. Quantification des produits de dégradation (hydrazone). I - Formulation du modèle. Validité en milieu dilué. Interprétation. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989862149] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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21
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Delalu H, Marchand A. Influence d’une ionisation des réactifs sur l’aspect mécanistique de l’interaction chloramine-diméthylamine. Formation parallèle de diméthyl-hydrazine et de diméthylchloramine. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989861941] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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22
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Saugnac F, Teyssandier F, Marchand A. Carbon-boron-nitrogen compounds obtained between 800 and 1000°C by low temperature chemical vapor deposition. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1992891453] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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23
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24
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Pacault A, Marchand A, Bothorel P, Zanchetta J, Boy F, Cherville J, Oberlin M. Étude de la structure électronique de carbones prégraphitiques. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1960570892] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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25
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Poquet E, Lumbroso N, Hoarau MMJ, Marchand A, Pacault A, Soule DE. Étude du diamagnétisme de monocristaux de graphite. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1960570866] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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