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Personne :
Mauriege, Pascale

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Mauriege

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Pascale

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Université Laval. Département de kinésiologie

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ncf11860389

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Voici les éléments 1 - 3 sur 3
  • PublicationRestreint
    Contribution of genetic and metabolic syndrome to omental adipose tissue PAI-1 gene mRNA and plasma levels in obesity
    (Springer Nature, 2010-02-02) Pérusse, Louis; Mauriege, Pascale; Lebel, Stéfane; Hould, Frédéric-Simon; Marceau, Picard; Vohl, Marie-Claude; Bouchard, Luigi; Bergeron, Jean
    Background Plasminogen activator inhibitor type-1 (PAI-1) has already been associated with atherosclerosis; myocardial infarction; and cardiovascular disease risk factors such as obesity, insulin resistance, and dyslipidemia. However, factors regulating PAI-1 adipose tissue (AT) gene expression and plasma levels are not yet well defined. Aim This study aims to assess the contribution of PAI-1 omental AT mRNA levels and genetic and metabolic factors to variation in plasma PAI-1 concentrations. Methods Ninety-one non-diabetic premenopausal severely obese women (body mass index, BMI >35 kg/m2) undergoing bariatric surgery were phenotyped (fasting plasma glucose, lipid-lipoprotein, and PAI-1 levels) and genotyped for four PAI-1 polymorphisms. Omental AT PAI-1 mRNA levels were determined using real-time polymerase chain reaction. Stepwise regression analysis was used to identify independent PAI-1 AT mRNA and plasma level predictors. Results Among the variables included to the stepwise regression analysis, plasma high-density lipoprotein (HDL)-cholesterol (r = 0.38; p = 0.0004) and total cholesterol (r = 0.16; p = 0.0541) levels were the only two (out of 12) independent variables retained as predictive of PAI-1 omental AT mRNA levels, whereas BMI (r = 0.35; p = 0.0039), plasma HDL-cholesterol concentrations (r = −0.31; p = 0.0375), PAI-1 omental AT mRNA levels (r = 0.19; p = 0.0532) and PAI-1-844G/A (p = 0.0023), and rs6092 (p.A15T; p = 0.0358) polymorphisms contributed independently to plasma PAI-1 concentrations. Taken together, these variables explained 17.8% and 31.0% of the variability in PAI-1 AT mRNA and plasma levels, respectively. Conclusion These results suggest that PAI-1 polymorphisms contribute significantly to PAI-1 plasma levels but do not support the notion that omental AT is one of its major source.
  • PublicationRestreint
    Food group preferences and energy balance in moderately obese postmenopausal women subjected to brisk walking program
    (National Research Council Canada, 2017-03-19) Garnier, Sophie; Drapeau, Vicky; Mauriege, Pascale; Lemoine-Morel, Sophie; Tremblay, Angelo; Vallée, Karine; Blouin, Sandra; Auneau, Gérard
    L’objectif de l’étude était d’examiner les effets d’un programme de marche de 16 semaines sur les préférences alimentaires et l’équilibre énergétique de femmes caucasiennes, d’âge 60 ± 5 ans, sédentaires, ménopausées et modérément obèses (indice de masse corporelle, 29–35 kg/m2). 156 volontaires suivaient 3 sessions/semaine de 45 min de marche à 60 % de la fréquence cardiaque de réserve. L’apport énergétique total (AET) et les préférences alimentaires (journal alimentaire de 3 jours), la dépense énergétique totale (DET, journal d’activité physique de 3 jours), la condition physique (2 km-marche), des variables anthropométriques et la composition corporelle (bioimpédancemétrie) ont été mesurés avant et après la marche. Une analyse de variance à mesures répétées (temps) a été effectuée. La légère augmentation de la DET de 151 ± 24 kcal/jour (p < 0.0001) a entraîné une réduction de poids, de masse grasse, et du tour de taille (p < 0.0001). L’AET n’a pas changé malgré une légère diminution de l’apport glucidique et une faible augmentation de l’apport protéique (p < 0.05). L’analyse des journaux alimentaires a révélé une baisse de la consommation de fruits (p < 0.05), d’aliments sucrés et gras (p < 0.01), mais une augmentation de celle d’huiles (p < 0.0001) après la marche. Les femmes ayant perdu le plus de poids réduisaient davantage leur consommation de fruits, sucre, aliments sucrés et gras (p < 0.05). Les femmes dont la réduction de masse grasse était la plus importante diminuaient davantage leur consommation d’aliments gras (p < 0.05). En conclusion, bien que notre programme de marche ait modifié la consommation de certains groupes d’aliments, la perte de poids était principalement due à une réduction de DET.
  • PublicationRestreint
    Irisin is more strongly predicted by muscle oxidative potential than adiposity in non-diabetic men
    (Springer Science & Business Media B.V., 2015-03-28) Joanisse, Denis R.; Dubois, Marie Julie; Marette, André; Fleury, Pascale; Tremblay, Angelo; Lacaille, Michel; Weisnagel, John; Huth, Claire; Mauriege, Pascale
    Numerous controversies surround the peptide hormone irisin. Although implicated as a myokine promoting the browning of adipose tissue in rodents, its roles in humans remain unclear. Contradictory results have also been found with respect to the relationships between adiposity or metabolic health and plasma irisin levels in humans. We investigated the relationship between irisin levels and body composition (hydrostatic weighing), insulin sensitivity (hyperinsulinemiceuglycemic clamp), fitness level (ergocycle VO2max) and skeletal muscle metabolic profile in 53 men (aged 34–53 years) from four groups: sedentary non-obese controls (body mass index [BMI] <25 kg/m2), sedentary obese (BMI >30 kg/m2), sedentary obese glucose-intolerant, and non-obese highly trained endurance active. Baseline plasma irisin levels were significantly different between groups, being lowest in trained men (140.6±38.2 ng/mL) and highest in metabolically deteriorated glucose-intolerant subjects (204.0±50.5 ng/mL; ANOVA p=0.01). Including all subjects, irisin levels were positively associated with adiposity (e.g. fat mass, r=0.430, p<0.01) and negatively associated with fitness (r=-0.369, p<0.01), insulin sensitivity (M/I, r=-0.355, p<0.01) and muscle citrate synthase (CS) activity (r=-0.482, p<0.01). Most correlations lost statistical significance when excluding active individuals, except for insulin resistance (r=-0.413, p<0.01) and CS (r=-0.462, p<0.01). Multiple regression analyses reveal CS as the strongest independent predictor of irisin levels (r2 range 0.214 to 0.237). We conclude that muscle oxidative potential is an important factor linked to circulating irisin levels. Keywords : Irisin . Myokine . Adipose tissue . Adipokine . Obesity. Insulin sensitivity