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Iceta, Sylvain

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Iceta

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Sylvain

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Université Laval. École de nutrition

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ncf13717745

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  • PublicationRestreint
    Food addiction as a proxy for anorexia nervosa severity : new data based on the yale food addiction scale 2.0
    (New York (N.Y) : Elsevier, 2020-09-23) Tran, Helene; Poinsot, Pierre; Guillaume, Sebastien; Delaunay, Dominique; Bernetiere, Marion; Bégin, Catherine; Fourneret, Pierre; Peretti, Noël; Iceta, Sylvain
    The contribution of an addictive process to anorexia nervosa (AN) is an area of growing interest. Yet, little is known about how the food addiction concept (FA) may be of interest in understanding AN. This study investigates prevalence of FA diagnostic and its association with markers of severity in individuals with AN. We conducted a retrospective study in a sample of 73 patients with AN. We assessed FA with the Yale Food Addiction Scale 2.0, depressive and anxiety disorders, impulsivity (Beck Depression Inventory, STAI, BIS-11) and eating behavior (BITE, EDE-Q). Prevalence of FA in our sample was 47%. FA was significantly associated and positively correlated with the binge-eating/purging subtype of AN, higher levels of depression, anxiety and greater eating psychopathology. FA was not associated with level of impulsivity nor leptin and IGF-1 blood levels. The relationship between FA severity and AN severity was mediated by the severity of binge eating behaviors. Our results suggest that the presence of FA may represent a more severe variant of AN. Longitudinal studies are needed to better understand the etiologic process between FA and AN.
  • PublicationRestreint
    The impact of restrictive and non-restrictive dietary weight loss interventions on neurobehavioral factors related to body weight control : the gaps and challenges
    (Springer, 2021-07-27) Iceta, Sylvain; Panahi, Shirin; García-García, Isabel; Michaud, Andréanne
    Purpose of Review Restrictive diets, such as low-calorie diets, are difficult to maintain in the long term. For this reason, their popularity has decreased compared to non-restrictive approaches, which instead promote healthy eating strategies. Since both strategies may entail different neurobiological mechanisms, this review will examine the current evidence on the effects of restrictive and non-restrictive interventions on neurobehavioral factors. Recent Findings Restrictive diets appear to improve eating behaviors, and the evidence reviewed argues against the notion that they may worsen the severity of binge eating. Moreover, they may lead to short-term changes in brain structure and improvements in cerebrovascular markers which, in turn, could impact eating behaviors. Non-restrictive interventions may have a positive effect on weight management and eating behaviors. However, evidence of their neural effects is scarce. Summary Small sample sizes, short follow-ups, and the absence of control groups are limitations of the studies targeting both interventions. Rigorous long-term randomized studies are needed to examine the neurobehavioral effects of restrictive and non-restrictive approaches.
  • PublicationRestreint
    Food preferences and their perceived changes before and after bariatric surgery : a cross-sectional study
    (New York (N.Y.) : Springer, 2021-03-20) Guyot, Erika; Dougkas, Anestis; Robert, Maud; Nazare, Julie-Anne; Iceta, Sylvain; Disse, Emmanuel
    Purpose : Changes in food preferences, taste, and smell following bariatric surgery have been previously described but with inconsistent results. We aimed to describe current food preferences and their perceived changes before and after the surgery. We further compared food preferences between patients with and without taste or smell alterations, before and above 2 years followup, and concerning the success or failure of their surgery. Materials and Methods : This cross-sectional study was conducted with a self-administered online questionnaire. Two years was the cut-off between short- and long-termfollow-up. Success was defined as an excess weight loss (EWL) greater or equal to 50%. Results : In total, 220 postoperative patients answered the questionnaire. Patients with taste alterations (64%) had significantly lower preferences for red meat, milk, cheese, desserts, fried foods, and water (all p < 0.05) relative to the non-taste alteration group, while those with smell alterations (38%) had significantly lower preference for cheese only (p < 0.05) relative to the nonsmell alteration group. Patients with a ≥ 2-year follow-up had a higher liking for desserts, fried foods, fat, bread, hot drinks, and alcohol compared to patients with a < 2-year follow-up (all p < 0.05). Patients having success in surgery had higher liking scores for green vegetables and lower liking scores for starchy foods, milk, and sweet dairy products (all p < 0.05). Conclusions : Our study suggests that patients who underwent bariatric surgery have different food preference patterns according to their sensory perceptions, the duration of their follow-up, and the success of bariatric surgery.
  • PublicationRestreint
    A systematic review and meta-analyses of food preference modifications after bariatric surgery
    (Oxford : Blackwell Science, 2021-07-26) Guyot, Erika; Dougkas, Anestis; Nazare, Julie-Anne; Bagot, Sarah; Disse, Emmanuel; Iceta, Sylvain
    This systematic review and meta-analyses aimed to synthesize evidence of the link between bariatric surgery and changes in food preferences, considering the method of assessment. MEDLINE, Cochrane Library, Web of Science, Cinahl, PsychINFO, ProQuest, and Open grey were searched incorporating two blocks of terms (“Intervention” and “Food Preferences”). Interventional or observational studies involving patients (BMI ≥ 35 kg m 2) with sleeve gastrectomy (SG) or Roux-en-Y Gastric Bypass (RYGB) and a control group were included. Meta-analyses were performed comparing the standardized daily mean percentage energy from proteins, carbohydrates, and lipids between preoperative and postoperative patients. Fifty-seven studies concerning 2,271 patients with RYGB and 903 patients with SG met the inclusion criteria, of which 24 were eligible for meta-analysis. Despite a total reduction in macronutrient intakes, the meta-analyses revealed a postoperative increase in percentage energy from proteins at 12 months (0.24, 95% CI: 0.03, 0.46, {I2} = 73%) and a decrease in percentage energy from fat at 1 month ( 0.47, 95% CI: 0.86, 0.09, {I2} = 72%), up to 24 months ( 0.20, 95% CI:  0.31, 0.08, {I2} = 0%). In conclusion, the present systematic review and meta-analyses showed changes of food preferences in terms of macronutrient, food selection and, overall food appreciation up to 5 years following bariatric surgery.
  • PublicationAccès libre
    COVID-19 pandemic lockdown and problematic eating behaviors in a student population
    (Akadémiai Kiadó, 2020-10-12) Flaudias, Valentin; Iceta, Sylvain; Zerhouni, Oulmann; Rodgers, Rachel F.; Billieux, Joël; Llorca, Pierre-Michel; Boudesseul, Jordane; De Chazeron, Ingrid; Romo, Lucia; Maurage, Pierre; Samalin, Ludovic; Bègue, Laurent; Naassila, Mickael; Brousse, Georges; Guillaume, Sébastien
    Background and aims: Since mid-March 2020, over 3 billion people have been confined as a result of the COVID-19 pandemic. Problematic eating behaviors are likely to be impacted by the pandemic through multiple pathways. This study examined the relationships between stress related to lockdown measures and binge eating and dietary restriction in a population of French students during the first week of confinement. Methods: A sample of undergraduate students (N 5 5,738) completed an online questionnaire 7 days after lockdown measures were introduced. The survey comprised variables related to lockdown measures and the COVID-19-pandemic, mood, stress, body image, binge eating and dietary restriction during the past 7 days, as well as intent to binge eat and restrict in the following 15 days. Results: Stress related to the lockdown was associated with greater likelihood of binge eating and dietary restriction over the past week and intentions to binge eat and restrict over the next 15 days. Greater exposure to COVID-19-related media was associated with increased eating restriction over the past week. Binge eating and restriction (past and intentions) were associated with established risk factors, including female gender, low impulse regulation, high body dissatisfaction, and having a concurrent probable eating disorder. Discussion and conclusion: The higher the stress related to the first week of confinement, the higher the risk of problematic eating behaviors among students, particularly those characterized by eating-related concerns. Screening for risk factors and providing targeted interventions might help decrease problematic eating behaviors among those who are most vulnerable.
  • PublicationAccès libre
    Medication in AN : a multidisciplinary overview of meta-analyses and systematic reviews
    (MDPI AG, 2019-02-25) Blanchet, Corinne; Guillaume, Sébastien; Bat-Pitault, Flora; Carles, Marie-Emilie; Clarke, Julia; Dodin, Vincent; Duriez, Philibert; Gerardin, Priscille; Hanachi-Guidoum, Mouna; Iceta, Sylvain; Leger, Juliane; Segrestin, Bérénice; Stheneur, Chantal; Godart, Nathalie
    Drugs are widely prescribed for anorexia nervosa in the nutritional, somatic, and psychiatric fields. There is no systematic overview in the literature, which simultaneously covers all these types of medication. The main aims of this paper are (1) to offer clinicians an overview of the evidence-based data in the literature concerning the medication (psychotropic drugs and medication for somatic and nutritional complications) in the field of anorexia nervosa since the 1960s, (2) to draw practical conclusions for everyday practise and future research. Searches were performed on three online databases, namely MEDLINE, Epistemonikos and Web of Science. Papers published between September 2011 and January 2019 were considered. Evidence-based data were identified from meta-analyses, if there were none, from systematic reviews, and otherwise from trials (randomized or if not open-label studies). Evidence-based results are scarce. No psychotropic medication has proved efficacious in terms of weight gain, and there is only weak data suggesting it can alleviate certain psychiatric symptoms. Concerning nutritional and somatic conditions, while there is no specific, approved medication, it seems essential not to neglect the interest of innovative therapeutic strategies to treat multi-organic comorbidities. In the final section we discuss how to use these medications in the overall approach to the treatment of anorexia nervosa.
  • PublicationRestreint
    Cognitive function in binge eating disorder and food addiction : a systematic review and three-level meta-analysis
    (Oxford : Pergamon, 2021-07-10) Iceta, Sylvain; Rodrigue, Christopher; Legendre, Maxime; Daoust, Justine; Flaudias, Valentin; Michaud, Andréanne; Bégin, Catherine
    Background: An extensive body of recent research has focused on the contribution of cognitive functioning to eating behaviors. In binge eating disorder (BED) and food addiction (FA), the extent of cognitive impairment is still unclear. This study aimed to characterize, among those with BED and FA, neurocognitive functions using performances based on neuropsychological tasks in the context of neutral stimuli in adults. Method: MEDLINE, Embase, PsycINFO, Cochrane Database of Systematic Reviews, CINAHL and gray literature (ProQuest and OpenGrey) were used to identify studies that reported neurocognitive assessments in BED or FA up to December 2019. A three-level meta-analysis was conducted. Results: A significant overall effect was found for global cognitive impairments, suggesting that individuals with BED or FA have poorer performances when completing cognitive tasks. Analyses for specific cognitive domains revealed that individuals with BED showed poorer performances at tasks assessing cognitive flexibility, inhibitory control, attention and planning. Analyses regarding FA were inconclusive due to a lack of studies. Thus, the results were described qualitatively. Conclusion: Our meta-analysis highlighted the cognitive weaknesses that seem to come with BED and the necessity to integrate them in the assessment and treatment of this condition. It also stressed the lack of quality studies surrounding the cognitive features of FA.
  • PublicationRestreint
    Prefrontal cortex and impulsivity : interest of noninvasive brain stimulation
    (New York (N.Y.) : Elsevier, 2016-08-30) Brevet-Aeby, Charlotte; Brunelin, Jerome; Iceta, Sylvain; Padovan, Catherine; Poulet, Emmanuel
    Introduction: Impulsivity has been reported in many psychiatric conditions and includes deficits in several cognitive functions such as attention, inhibitory control, risk taking, delay discounting and planning. Many studies have shown that noninvasive brain stimulation (NIBS) techniques modulate the activity of the prefrontal cortex and the functions involved in impulsivity. Objective: This article aims to review the literature on the effect of NIBS on impulsivity in healthy subjects aged 18–65 years old, and to highlight research avenues to develop therapeutic alternatives for such disorders. Method: We performed a systematic review of the literature in the PubMed database following PRISMA method with “transcranial magnetic stimulation”, “repetitive transcranial magnetic stimulation”, “transcranial direct current stimulation”, “inhibition”, “risk”, “impulsive behavior”, “attention”, “reward”, “delay discounting”, “delay task”, “planning”, “prefrontal cortex” as key words. Results: We selected fifty-six studies showing modulation of the cognitive functions involved in impulsivity through NIBS. Conclusions: The data led us to consider new therapeutic alternatives in impulsive disorders by modulating prefrontal cortex activity through NIBS.
  • PublicationRestreint
    Consensus paper of the WFSBP task force on biological markers : criteria for biomarkers and endophenotypes of schizophrenia part II : cognition, neuroimaging and genetics
    (Taylor & Francis, 2016-06-17) Schmitt, Andrea; Rujescu, Dan; Gawlik, Micha; Hasan, Alkomiet; Hashimoto, Kenji; Iceta, Sylvain; Jarema, Marek; Kambeitz, Joseph; Kasper, Siegfried; Keeser, Daniel; Kornhuber, Johannes; Koutsouleris, Nikolaos; Lanzenberger, Rupert; Malchow, Berend; Saoud, Mohamed; Spies, Marie; Stöber, Gerald; Thibaut, Florence; Riederer, Peter; Falkai, Peter; World Federation of the Societies of Biological Psychiatry
    Objectives: Schizophrenia is a group of severe psychiatric disorders with high heritability but only low odds ratios of risk genes. Despite progress in the identification of pathophysiological processes, valid biomarkers of the disease are still lacking. Methods: This comprehensive review summarises recent efforts to identify genetic underpinnings, clinical and cognitive endophenotypes and symptom dimensions of schizophrenia and presents findings from neuroimaging studies with structural, functional and spectroscopy magnetic resonance imaging and positron emission tomography. The potential of findings to be biomarkers of schizophrenia is discussed. Results: Recent findings have not resulted in clear biomarkers for schizophrenia. However, we identified several biomarkers that are potential candidates for future research. Among them, copy number variations and links between genetic polymorphisms derived from genome-wide analysis studies, clinical or cognitive phenotypes, multimodal neuroimaging findings including positron emission tomography and magnetic resonance imaging, and the application of multivariate pattern analyses are promising. Conclusions: Future studies should address the effects of treatment and stage of the disease more precisely and apply combinations of biomarker candidates. Although biomarkers for schizophrenia await validation, knowledge on candidate genomic and neuroimaging biomarkers is growing rapidly and research on this topic has the potential to identify psychiatric endophenotypes and in the future increase insight on individual treatment response in schizophrenia.
  • PublicationAccès libre
    Spontaneous neural activity changes after bariatric surgery : a resting-state fMRI study
    (Academic Press, 2021-07-21) Zeighami, Yashar; Iceta, Sylvain; Dadar, Mahsa; Pelletier, Mélissa; Nadeau, Mélanie; Biertho, Laurent; Lafortune, Annie; Tchernof, André; Fulton, Stephanie; Evans, Alan; Richard, Denis; Dagher, Alain; Michaud, Andréanne
    Background: Metabolic disorders associated with obesity could lead to alterations in brain structure and function. Whether these changes can be reversed after weight loss is unclear. Bariatric surgery provides a unique oppor- tunity to address these questions because it induces marked weight loss and metabolic improvements which in turn may impact the brain in a longitudinal fashion. Previous studies found widespread changes in grey matter (GM) and white matter (WM) after bariatric surgery. However, findings regarding changes in spontaneous neural activity following surgery, as assessed with the fractional amplitude of low frequency fluctuations (fALFF) and regional homogeneity of neural activity (ReHo), are scarce and heterogenous. In this study, we used a longitu- dinal design to examine the changes in spontaneous neural activity after bariatric surgery (comparing pre- to post-surgery), and to determine whether these changes are related to cardiometabolic variables. Methods: The study included 57 participants with severe obesity (mean BMI = 43.1 ± 4.3 kg/m 2 ) who under- went sleeve gastrectomy (SG), biliopancreatic diversion with duodenal switch (BPD), or Roux-en-Y gastric bypass (RYGB), scanned prior to bariatric surgery and at follow-up visits of 4 months ( N = 36), 12 months ( N = 29), and 24 months ( N = 14) after surgery. We examined fALFF and ReHo measures across 1022 cortical and subcor- tical regions (based on combined Schaeffer-Xiao parcellations) using a linear mixed effect model. Voxel-based morphometry (VBM) based on T1-weighted images was also used to measure GM density in the same regions. We also used an independent sample from the Human Connectome Project (HCP) to assess regional differences between individuals who had normal-weight ( N = 46) or severe obesity ( N = 46). Results: We found a global increase in the fALFF signal with greater increase within dorsolateral prefrontal cortex, precuneus, inferior temporal gyrus, and visual cortex. This effect was more significant 4 months after surgery. The increase within dorsolateral prefrontal cortex, temporal gyrus, and visual cortex was more limited after 12 months and only present in the visual cortex after 24 months. These increases in neural activity measured by fALFF were also significantly associated with the increase in GM density following surgery. Furthermore, the in- crease in neural activity was significantly related to post-surgery weight loss and improvement in cardiometabolic variables, such as blood pressure. In the independent HCP sample, normal-weight participants had higher global and regional fALFF signals, mainly in dorsolateral/medial frontal cortex, precuneus and middle/inferior temporal gyrus compared to the obese participants. These BMI-related differences in fALFF were associated with the in- crease in fALFF 4 months post-surgery especially in regions involved in control, default mode and dorsal attention networks. Conclusions: Bariatric surgery-induced weight loss and improvement in metabolic factors are associated with widespread global and regional increases in neural activity, as measured by fALFF signal. These findings along- side the higher fALFF signal in normal-weight participants compared to participants with severe obesity in an independent dataset suggest an early recovery in the neural activity signal level after the surgery.