Sustained insulin treatment restoring metabolic status, body weight, and cognition in an anorexia nervosa-like animal model in mice

INTRODUCTION

Anorexia Nervosa (AN) is a psycho-socio-biological disease characterized by severe weight loss as result of dieting and hyperactivity. Effective treatments are scarce, despite its significant prevalence and mortality. AN patients show lower basal insulin levels and increased metabolic clearance, leading to weight loss, cognitive deficits, and hormonal imbalances. Low-dose polymer insulin could potentially reverse these effects by restoring brain function, reducing fear of weight gain, encouraging food intake, and restoring fat depots. This study evaluates an insulin delivery system designed for sustained release and AN treatment.

METHODS

AN-like model was established through dietary restriction (DR). On days 1-25, mice were on DR, and on days 26-31 they were on ad libitum regimen. An insulin-loaded delivery system was administered subcutaneously (1% w/w insulin). The impact of insulin treatment on gene expression in the hippocampus (cognition, regulation of stress, neurogenesis) and hypothalamus (eating behavior, mood) was assessed. Behavioral assays were conducted to evaluate motor activity and cognitive function.

RESULTS

The delivery system demonstrated sustained insulin release, maintaining therapeutic plasma levels. Diet restriction mice treated with the insulin delivery system showed body weight restoration. Gene expression analysis revealed enhanced expression of CB1 and CB2 genes associated with improved eating behavior and cognition, while POMC expression was reduced. Insulin-polymer treatment restored cognitive function and decreased hyperactivity in the AN-like model.

CONCLUSION

The PSA-RA-based insulin delivery system effectively restores metabolic balance, body weight, and cognitive function in the AN model. Its ability to steadily release insulin makes it a promising candidate for AN treatment."

Refeeding syndrome and psychopharmacological interventions in children and adolescents with Anorexia Nervosa: a focus on olanzapine-related modifications of electrolyte balance

This study aims to investigate the potential correlation between the use of olanzapine, a psychopharmacological intervention commonly prescribed in Anorexia Nervosa treatment, and the occurrence of Refeeding Syndrome. Despite the acknowledged nutritional and biochemical impacts of olanzapine, the literature lacks information regarding its specific association with Refeeding Syndrome onset in individuals with Anorexia Nervosa. This is a naturalistic, retrospective, observational study, reporting the occurrence of Refeeding Syndrome in children and adolescents with Anorexia Nervosa, treated or untreated with olanzapine. Dosages and serum levels of olanzapine were assessed for potential associations with the occurrence of Refeeding Syndrome and specific variations in Refeeding Syndrome-related electrolytes. Overall, 113 patients were enrolled, including 46 (41%) who developed a Refeeding Syndrome. Mild (87%), moderate (6.5%), and severe (6.5%) Refeeding Syndrome was described, at a current average intake of 1378 ± 289 kcal/day (39 ± 7.7 kcal/kg/die), frequently associated with nasogastric tube (39%) or parenteral (2.2%) nutrition. Individuals receiving olanzapine experienced a more positive phosphorus balance than those who did not (F(1,110) = 4.835, p = 0.030), but no difference in the occurrence of Refeeding Syndrome was documented. The mean prescribed doses and serum concentrations of olanzapine were comparable between Refeeding Syndrome and no-Refeeding Syndrome patients.    Conclusion: The present paper describes the occurrence of Refeeding Syndrome and its association with olanzapine prescriptions in children and adolescents with Anorexia Nervosa. Olanzapine was associated with a more positive phosphorus balance, but not with a different occurrence of Refeeding Syndrome. Further, longitudinal studies are required. What is Known: • Refeeding Syndrome (RS) is a critical complication during refeeding in malnourished patients, marked by electrolyte (phosphorus, magnesium, potassium) imbalances. • Olanzapine, an atypical antipsychotic with nutritional and biochemical impacts, is used in Anorexia Nervosa (AN) treatment, however data concerning its association with RS are lacking. What is New: • The study observed RS in 46/113 (41%) young patients with AN. • Olanzapine-treated individuals showed a higher improvement in serum phosphate levels than untreated ones, although no impact on the occurrence of Refeeding Syndrome was observed.

Intra-individual cortical networks in Anorexia Nervosa: Evidence from a longitudinal dataset

OBJECTIVE

This work investigates cortical thickness (CT) and gyrification patterns in Anorexia Nervosa (AN) before and after short-term weight restoration using graph theory tools.

METHODS

38 female adolescents with AN underwent structural magnetic resonance imaging scans at baseline and after - on average - 3.5 months following short-term weight restoration while 53 age-matched healthy controls (HCs) were scanned once. Graph measures were compared between groups and longitudinally within the AN group. Associations with clinical measures such as age of onset, duration of illness, BMI standard deviation score (BMI-SDS), and longitudinal weight changes were tested via stepwise regression.

RESULTS

Cortical thickness graphs of patients with acute AN displayed lower modularity and small-world index (SWI) than HCs. Modularity recovered after weight gain. Reduced global efficiency and SWI were observed in patients at baseline compared to HCs based on gyrification networks. Significant associations between local clustering of CT at admission and BMI-SDS, and clustering/global efficiency of gyrification and duration of illness emerged.

CONCLUSIONS

Our results indicate a shift towards less organised CT networks in patients with acute AN. After weight recovery, the disarrangement seems to be partially reduced. However, longer-term follow-ups are needed to determine whether cortical organizational patterns fully return to normal.

Plasma proteome profiling reveals metabolic and immunologic differences between Anorexia Nervosa subtypes

AIMS/HYPOTHESIS

Anorexia Nervosa (AN) is a severe psychiatric disorder of an unknown etiology with a crude mortality rate of about 5 % per decade, making it one of the deadliest of all psychiatric illnesses. AN is broadly classified into two main subtypes, restricting and binge/purging disorder. Despite extensive research efforts during several decades, the underlying pathophysiology of AN remains poorly understood. In this study, we aimed to identify novel protein biomarkers for AN by performing a proteomics analysis of fasting plasma samples from 78 females with AN (57 restrictive and 21 binge/purge type) and 70 healthy controls.

METHODS

Using state-of-the-art mass spectrometry-based proteomics technology in conjunction with an advanced bioinformatics pipeline, we quantify >500 plasma proteins.

RESULTS

Differential expression analysis and correlation of proteomics data with clinical variables led to identification of a panel of novel protein biomarkers with potential pathophysiological significance for AN. Our findings demonstrate evidence of a humoral immune system response, altered lipid metabolism and potential alteration of plasma cells in AN patients. Additionally, we stratified AN patients based on the quantified proteins and suggest a potential autoimmune nature in the restrictive subtype of AN.

CONCLUSIONS/INTERPRETATION

In summary, on top of biomarkers of AN subtypes, this study provides a comprehensive map of plasma proteins that constitute a resource for further studies of the pathophysiology of AN.

Anorexia Nervosa in vivo cytokine production: a systematic review

INTRODUCTION

The underlying psychobiology that contributes to Anorexia Nervosa (AN) onset and disease progression remains unclear. New research is emerging suggesting a possible link between inflammation and a variety of mental illnesses. Alterations of cytokines may play a role in the pathogenesis of AN. Some studies have found differences in the cytokine profile of those with AN compared to healthy controls, but results are heterogeneous. The aim of this work was to systematically review existing studies investigating in-vivo cytokine production in those with AN before and after weight restoration compared to controls.

METHODS

A comprehensive literature search of four electronic databases (PubMed, PsychInfo, EMBASE and CINAH) was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines to identify human in-vivo studies investigating the relationship between AN and cytokine production. Data extracted from included studies related to population characteristics (e.g. age, gender, mean mBMI/%IBW), cytokine measurement and relevant findings. Confounding factors (e.g. smoking status, co-morbid mental illness, menstruation status) were also collected.

RESULTS

36 studies were eligible for this systematic review of which the majority were conducted in Europe (77.8%) and involved female subjects (97.2%). Those with AN ranged in age from 13 to 47 years and had an illness duration of 3 months to 24 years. 15 candidate cytokines and 3 receptors were identified (TNF-alpha, IL-6, IL-1B, CRP, IL-2, IL-7, IL-10, IFN-γ, TNF-R2, IL-1 α, IL-15, TNF-R1, IL-17, IL-18, TGF-B1, IL-12, IL-6R and TGF-B2) exploring in-vivo levels in patients with AN and comparing to controls. TNF-alpha and IL-6 were the most extensively studied with IL-6 being significantly elevated in 4 out of 8 (50%) of longitudinal studies when comparing AN patients at baseline compared to post weight restoration. Following weight restoration, there was no difference in IL-6 levels when comparing to HC in 7 of 8 (87.5%) longitudinal studies examined.

CONCLUSIONS

The most promising cytokine potentially involved in the pathogenesis of AN appears to be IL-6, and possibly TNF-alpha pathways. The heterogeneity of clinical and methodology factors impedes the generalizability of results. Future studies may wish to address these methodological shortcomings as alterations in cytokine levels in AN could act as therapeutic targets assisting with weight restoration and psychopathology and may offer diagnostic potential.

Associations between nutritional intake, stress and hunger biomarkers, and anxiety and depression during the treatment of anorexia nervosa in adolescents and young adults

Adolescents and young adults (AYA) with anorexia nervosa (AN) frequently have co-occurring anxiety and depression, which can negatively impact prognosis. To inform treatment of co-occurring anxiety and depression, we assessed the association of nutritional intake and hunger/stress hormones on anxiety and depression using a six-month longitudinal study of 50 AYA females receiving care for AN. At baseline and six months, we measured anxiety (Spielberger State/Trait Anxiety Inventory [STAI]), depression (Beck Depression Inventory [BDI]), body mass index (BMI), 3-day dietary intake (total calories and proportion of fat, carbohydrate, protein), and serum cortisol, leptin, and adiponectin. We performed mixed effects linear regression analyses, adjusting for age, duration of AN, and percentage of median BMI (%mBMI). At baseline, median age was 16.3 (interquartile range [IQR]=2.5) years, duration of AN was 6 (IQR=8.8) months and %mBMI was 87.2 (IQR=10.5)%. Fifty-six percent had clinically significant anxiety; 30% had depression. Over 6 months, participants had significant improvements in %mBMI (+2.2[IQR=9.2]%, p<.01), STAI (-9.0[IQR=25.0], p<.01), and BDI (-5.0[IQR=13.8], p<.01) scores. Participants with larger improvements in caloric intake had greater improvements in STAI (p=.03) and BDI scores (p=.04). Larger improvement in BDI was significantly associated with increased fat intake (p<.01), but not carbohydrate or protein intake. Change in STAI was not associated with changes in fat, carbohydrate, or protein intake. Changes in STAI or BDI scores were not associated with changes in cortisol, leptin, or adiponectin. Increased caloric intake may augment treatment of co-occurring anxiety and depression, and increased fat intake may improve depression for AYA with AN.

Can we predict the development of acute gastric dilatation in patients with anorexia nervosa?

BACKGROUND

Acute gastric dilatation can develop in patients with anorexia nervosa who are being refed to achieve weight restoration. If unrecognized, this condition is associated with significant morbidity and mortality. Patients with acute gastric dilatation usually have abdominal pain, nausea, and vomiting. Abdominal imaging confirms the diagnosis. This study aims to identify risk factors associated with the development of acute gastric dilatation in patients with severe restrictive eating disorders in order to hasten diagnosis and guide treatment. This study also aims to define the clinical outcomes of patients with acute gastric dilatation.

METHODS

In this retrospective case series, 15 patients with a restrictive eating disorder were studied. Multiple variables were assessed for significant correlation with stomach size.

RESULTS

15 patients with a restrictive eating disorder were identified as being diagnosed with acute gastric dilatation through chart review during the study period. The average dilated stomach size was 20.5 cm. There was no significant correlation of stomach size with any of the following: % ideal body weight on day of admission, % ideal body weight on day of imaging study, rate of weight gain (kg per week), or duration of illness. Serum levels of sodium, potassium, phosphorus, magnesium, calcium, bicarbonate, blood urea nitrogen, glucose, albumin, and hematocrit on the day of imaging, did not correlate with stomach size. All patients were treated with conservative management. None of the patients required surgical intervention or progressed to gastric necrosis or perforation, and there were no recurrences of the acute gastric dilatation.

CONCLUSIONS

There are no specific risk factors significantly associated with the development of acute gastric dilatation in patients with severe restrictive eating disorders. Clinicians should maintain a high index of suspicion for this condition when patients are experiencing abdominal pain, nausea, or vomiting. When promptly diagnosed and treated, outcomes are good. If diagnosis is delayed, the outcome can be dire.

Severe-Enduring Anorexia Nervosa (SE-AN): a case series

BACKGROUND

Anorexia Nervosa (AN) poses significant therapeutic challenges, especially in cases meeting the criteria for Severe and Enduring Anorexia Nervosa (SE-AN). This subset of AN is associated with severe medical complications, frequent use of services, and the highest mortality rate among psychiatric disorders.

CASE PRESENTATION

In the present case series, 14 patients were selected from those currently or previously taken care of at the Eating Disorders Outpatients Unit of the Maggiore Hospital in Bologna between January 2012 and May 2023. This case series focuses on the effects of the disease, the treatment compliance, and the description of those variables that could help understand the great complexity of the disorder.

CONCLUSION

This case series highlights the relevant issue of resistance to treatment, as well as medical and psychological complications that mark the life course of SE-AN patients. The chronicity of these disorders is determined by the overlapping of the disorder's ego-syntonic nature, the health system's difficulty in recognizing the problem in its early stages, and the presence of occupational and social impairment.

Iron overload may be critical for liver dysfunction in anorexia nervosa, and the role of haematocrit-adjusted albumin in assessing nutritional status: a case report

BACKGROUND

Anorexia nervosa (AN) is frequently associated with liver dysfunction, but the precise mechanism remains undefined. Since the nutritional marker albumin has a low correlation with changes in body weight in AN, and patients with AN often have dehydration as a complication, we also examined whether haematocrit (HCT)-adjusted serum albumin could be a better nutritional marker in AN.

CASE PRESENTATION

We describe a 15-year-old girl with severe weight loss and liver damage whose liver enzymes normalized after 1.5 months of hospitalization and weight gain. We found a significant correlation between body weight (BW) and HCT-adjusted serum albumin (Spearman's rank correlation coefficient (rs) = 0.66, P = 5.28 × 10-3) and between BW and alanine aminotransferase (ALT) (rs = -0.825, P = 8.45 × 10-5). After division by HCT, correlations between serum albumin and ALT (rs = -0.835, P = 5.24 × 10-5) and between the iron-storage protein ferritin and the liver enzyme gamma-glutamyl transferase (rs = 1.0, P = 0.017) were also statistically significant.

CONCLUSION

These results suggest that improvement of the nutritional status in AN could relieve liver dysfunction and facilitate iron transport. Since a decrease in the iron-transport protein transferrin presumably increases labile non-transferrin-bound iron, resulting in excess reactive oxygen species production, a defect in iron transport due to malnutrition could be one of the causes of liver injury in AN. In addition, HCT-adjusted albumin could be a better marker than its raw data to assess changes in nutritional status in AN.

Informed consent and compulsory treatment on individuals with severe eating disorders: a bio-ethical and juridical problem

Background

The problem concerning the activation of the measure of Compulsory Health Treatment (CHT) for subjects suffering from Eating Disorders (ED) represents a legal paradox that places health professionals in the position of frequently doubting the real usefulness of the measure within the hospital context. This issue is mainly related to anorexia nervosa, which puts the subject in a higher life-threatening situation than other EDs.

Method and materials

To outline the current state of the art, the most recent national and international scientific publications concerning informed consent and CHT in EDs were searched. In addition, Italian rulings in various degrees of judgement were evaluated with the suggestion of a possible resolution of these issues.

Results

The analysis of the literature showed that although a multitude of psychometric instruments has been created to identify the ability to give informed consent, there are still not all the elements necessary to identify the actual degree of disease awareness of ED subjects. An important factor could be the exploration of the person's interception, which has been seen to be very high in individuals with AN who are known not to experience the sensation of hunger. At present, reviews of the bibliography and judgments have shown that the measurement of CHT remains crucial if it is intended as a life-saving treatment. However, it is evident that in terms of BMI, CHT is not a definitive intervention and therefore the adoption of this practice is necessary with extreme caution taking into account the person's actual ability to consent.

Conclusions

Future studies will have the task of determining the psychic factors necessary to better understand the state of the person in his or her physical and mental wholeness, giving due weight to these characteristics and orienting knowledge in a practical sense to more profitable direct treatment for individuals with ED.

[A history of childhood obesity acts as a barrier to the recovery from mental anorexia in adolescence ?]

High rates of obesity, unhealthy eating behaviors, and eating disorders among children and adolescents have a very negative impact on their physical and mental health. The role of pediatricians and general practitioners is central in terms of prevention and screening. When a referral to a specialist is necessary, it is important to consider the bidirectional relationship between eating disorders and mental health problems. A history of obesity in a patient with mental anorexia leads to the need for specific management, particularly in relation to the concept of Weight Suppression (WS).

Regardless of inequities in care, terminal anorexia nervosa exists: a response to Sharpe et al

We are pleased that the concept of terminal anorexia nervosa is being considered in serious discussion. Our previous presentations were not intended to assess eating disorders care broadly, but solely to bring attention to the importance of end-of-life care issues for patients with anorexia nervosa. Regardless of differences in ability to access or utilize health care resources, inescapably, individuals contending with end-stage malnutrition due to anorexia nervosa who refuse further nutrition will progressively decline, and some will die as a result. Our description of these patients' last days and weeks as "terminal" and meriting thoughtful end-of-life care is consistent with how the term is used in other end-stage terminal conditions. We clearly acknowledged that precise definitions and guidelines for end-of-life care for these patients should be developed by the eating disorder and palliative care fields. Avoiding the phrase "terminal anorexia nervosa" will not make these phenomena disappear. We are sorry that some individuals are upset by this concept. Our intention is certainly not to demoralize by "triggering" fears of hopelessness or death. But these discussions will inevitably distress some people. Individuals who are adversely affected by considering these issues might well benefit from further explorations, clarifications, and discussions with their clinicians and others. Finally, we clearly applaud expanding treatment options and availability, and we strongly advocate for making every effort to provide every patient every possible option for treatment and recovery at every phase of their struggles.

Anaplastic Lymphoma Kinase Receptor: Possible Involvement in Anorexia Nervosa

The pathophysiology of Anorexia Nervosa (AN) has not been fully elucidated. Anaplastic lymphoma kinase (ALK) receptor is a protein-tyrosine kinase mainly known as a key oncogenic driver. Recently, a genetic deletion of ALK in mice has been found to increase energy expenditure and confers resistance to obesity in these animals, suggesting its role in the regulation of thinness. Here, we investigated the expression of ALK and the downstream intracellular pathways in female rats subjected to the activity-based anorexia (ABA) model, which reproduces important features of human AN. In the hypothalamic lysates of ABA rats, we found a reduction in ALK receptor expression, a downregulation of Akt phosphorylation, and no change in the extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) phosphorylation. After the recovery from body weight loss, ALK receptor expression returned to the control baseline values, while it was again suppressed during a second cycle of ABA induction. Overall, this evidence suggests a possible involvement of the ALK receptor in the pathophysiology of AN, that may be implicated in its stabilization, resistance, and/or its exacerbation.

[Anorexia nervosa, a functional disorder between]

Anorexia nervosa (AN) is a functional eating disorder with a multifactorial origin without an underlying somatic disease. Two types of AN should be distinguished, pure restrictive AN and AN-boulimia with purging, most often among young females. AN is mainly a psychological disease, but it leads quite early to various somatic complications. Weight loss may be dramatic and different deficiencies then occur. Besides anorexia, aberrant behaviours may be present, which may be associated with severe complications. Management should be pluridisciplinary, yet no strategy has proved clear superiority. In cases with profound severity, either psychological/psychiatric or somatic, a hospitalization in a specialized unit becomes essential. The outcome remains uncertain and the final prognosis remains reserved in most cases.

A factor that can yield to eating attitude disorders in university students: Self-esteem

OBJECTIVE

To determine prevalence of eating attitude disorder (EAD) and the effect of self-esteem on EAD in female university students.

Study Design: In this cross-sectional study, female university students were included. The dependent variable was EAD determined by Eating Attitude Test-40. Socio-demographic characteristics, body perception, obesity, self-compassion and self-esteem were independent variables. Logistic regression (LR) models have been established to determine the associated factors of EAD. p < 0.05 was considered significant.

Results: EAD were found in 3.3% (n = 20) of the participants (n = 600). 44.5% had low and medium self-esteem and %13.4 were overweight (body mass index (BMI) ≥ 25.0). According to LR models, after adjusted for age, increased self-esteem score (decreased self-esteem) (OR:1.8, 95%CI:1.063-3.303) and practicing popular diet (OR:12.6, 95%CI:4.439-35.904) increased the risk of EAD significantly.

Conclusion: EAD were less than expected in this group of university students. Self-esteem is an important factor affecting EAD. Students with EAD may be recommended to get psychological support as well as nutritional counseling.

A multidimensional examination of affective and cognitive empathy in anorexia nervosa

Socio-emotional features are crucial in the development and maintenance of anorexia nervosa (AN). The present study investigates the patterns of altered and preserved empathic abilities in AN. Empathy is an umbrella term that comprises the ability to recognise another's emotional state, take another's perspective, and fantasise (cognitive empathy), as well as the ability to experience vicarious emotions and signal them (affective empathy). These empathic abilities were measured in 43 AN patients and 33 healthy women through a multi-method approach comprising self-report measures, behavioural tasks and bodily correlates. Further, we assessed self-reported approach-avoidance attitudes towards suffering others. Results showed that, within the domain of cognitive empathy, AN patients reported impairment in recognising emotional expressions of anger and fantasising. Concerning affective empathy, they manifested lower sharing of others' positive emotions, higher self-reported distress, and higher facial expressiveness during a video depicting a suffering person. Finally, AN patients reported lower motivation to approach suffering others. Our results draw a complex picture of preserved and altered empathic abilities in AN and capture which are the deficits mediated by the higher levels of anxiety and depression reported by the AN population and those that seem to persist independently from these co-morbid conditions.

Insulin and Disorders of Behavioural Flexibility

Behavioural inflexibility is a symptom of neuropsychiatric and neurodegenerative disorders such as Obsessive-Compulsive Disorder, Autism Spectrum Disorder and Alzheimer's Disease, encompassing the maintenance of a behaviour even when no longer appropriate. Recent evidence suggests that insulin signalling has roles apart from its regulation of peripheral metabolism and mediates behaviourally-relevant central nervous system (CNS) functions including behavioural flexibility. Indeed, insulin resistance is reported to generate anxious, perseverative phenotypes in animal models, with the Type 2 diabetes medication metformin proving to be beneficial for disorders including Alzheimer's Disease. Structural and functional neuroimaging studies of Type 2 diabetes patients have highlighted aberrant connectivity in regions governing salience detection, attention, inhibition and memory. As currently available therapeutic strategies feature high rates of resistance, there is an urgent need to better understand the complex aetiology of behaviour and develop improved therapeutics. In this review, we explore the circuitry underlying behavioural flexibility, changes in Type 2 diabetes, the role of insulin in CNS outcomes and mechanisms of insulin involvement across disorders of behavioural inflexibility.

Dynamic Changes in the Central Autonomic Network of Patients with Anorexia Nervosa

Autonomic cardiac dysfunction is a common complication in patients with anorexia nervosa (AN). Despite its high prevalence, physicians often overlook this clinical condition, and little research has been dedicated so far. To probe the functional role of the neurocircuitry underpinning the poorly understood autonomic cardiac dysfunction, we examined dynamic functional differences in the central autonomic network (CAN) between 21 acute AN individuals and 24 age, sex, and heart rate-matched healthy controls (HC). We assessed functional connectivity (FC) changes in CAN using seeds in the ventromedial prefrontal cortex, left and right anterior insular cortex, left and right amygdala, and dorsal anterior cingulate cortex. The overall FC between the six investigated seeds is reduced in AN individuals compared to HC, although no changes were observed for single connections. Moreover, AN exhibited higher complexity in the FC time series of such CAN regions. Contrary to HC, we found that the degree of complexity between FC and heart rate (HR) series did not correlate in AN, suggesting a shift from central to peripheral control of the heart in AN individuals. Using dynamic FC analysis, we showed that the CAN transits across 5 functional states with no preference for any. Strikingly, at the state of weakest connectivity, the entropy significantly diverges between healthy and AN individuals, reaching its minimum and maximum values, respectively. Overall, our findings provide evidence that core regions of the CAN engaged in cardiac regulation are functionally affected in acute AN.

Superior Mesenteric Artery Syndrome in an Adolescent Female with Anorexia Nervosa

Superior mesenteric artery syndrome (SMAS) is a rare condition that develops from compression of the duodenum between the superior mesenteric artery (SMA) and abdominal aorta. SMAS is an atypical complication of restrictive eating disorders. The SMA is supported by adipose tissue to create an aortomesenteric angle that varies from 25-60 degrees. A reduction in adipose tissue causes narrowing of this angle, and SMAS develops when the aortomesenteric angle is narrow enough that it compresses the distal duodenum passing through. Patients present with small bowel obstructive symptoms. We report a severe case of SMAS in an adolescent female with anorexia nervosa who presented with acute and chronic symptoms of bowel obstruction. Awareness of the association between SMAS and restrictive eating disorders can help guide clinical decision-making and prevent delay of diagnosis and serious complications.

Volume and complexity of the thalamus in Anorexia Nervosa: An exploratory evaluation

OBJECTIVE

Recent neuroscientific findings have highlighted the role of the thalamus in several cognitive functions, ranging from perception to cognitive flexibility, memory, and body representation. Since some of these functions may be involved in the pathophysiology of Anorexia Nervosa (AN), this study aims at exploring thalamic structure in different phases of the disorder.

METHOD

The sample included 38 patients with acute AN, 20 patients who fully recovered from AN (recAN), and 38 healthy controls (HC), all female. All participants underwent high-resolution MRI. The volumes of the whole thalamus and 25 thalamic nuclei were extracted using an automated segmentation algorithm, and thalamic fractal dimension was estimated using the calcFD toolbox.

RESULTS

Patients with acute AN, compared to HC, displayed reduced thalamic volume and complexity both at the whole level and at the level of specific nuclei. In patients recAN, instead, alterations were observed only at the level of the right laterodorsal and central lateral nuclei.

CONCLUSIONS

In the acute phase of the disorder patients with AN present a widespread reduction in thalamic volume and complexity. However, these alterations seem to normalise almost completely following weight restoration, thus suggesting the involvement of malnutrition-related mechanisms.

Body composition and energy expenditure in anorexia nervosa: preliminary data of outpatients with recovering and active disease

BACKGROUND

In Anorexia Nervosa (AN) recovery, body mass index (BMI) may not reflect body composition. To investigate recovery, bioelectrical impedance (BIA) parameters and energy expenditure were investigated in patients with active and recovering AN, with emphasis on phase angle (PA), a BIA parameter.

METHODS

BMI, PA, indirect BIA parameters (fat free mass, fat mass, total body water, fat free mass index, fat mass index) and resting metabolic rate (RMR) were obtained. Data from subjects distributed to active AN (ANact, n = 9), recovered AN (ANrec, n = 9) and healthy individuals (HI) (n = 16) were compared employing univariate methods and ordinal logistic regression.

RESULTS

In univariate comparison, the BMI would not distinguish recovered individuals; this distinction was observed for the PA (p =  < 0,001). PA showed a good capacity to discriminate, between ANrec and HI (AUC = 0.792; CI = 0.564- 1.000; p = 0.017). In 2 models of ordinal logistic regression PA (OR = 0.123; 95% CI 0.030; 0.503 and OR = 0.091; 95% CI 0.016; 0.528) remained as a significant independent variable, indicating that increases in PA are related to higher probabilities of moving from ANact, to ANrec and to HI group. Bivariate regression indicated the presence of a relationship between PA and (R2 = 0.266, p = 0.002).

CONCLUSIONS

Changes in body composition and energy expenditure were observed in recovered anorexics with normal BMI. PA can play an important role in the assessment of recovering anorexic patients.

Design and testing of a health economic Markov model for treatment of anorexia nervosa

OBJECTIVES

Anorexia Nervosa (AN) is a severe psychiatric disorder and knowledge about the cost-effectiveness of potential interventions is limited. The aim of this paper is to introduce the Trimbos Institute health economic cost-effectiveness model for Anorexia Nervosa (AnoMod-TI), a flexible modelling tool for assessing the long-term cost-effectiveness of interventions for AN in late adolescent and adult patients, which could support clinical decision making.

METHODS

AnoMod-TI is a state-transition cohort simulation (Markov) model developed from a Dutch societal perspective, which consists of four health states - namely full remission (FR), partial remission (PR), AN and death. Results are expressed as total healthcare costs, QALYs and incremental cost-effectiveness ratio.

RESULTS

For the purpose of demonstrating AnoMod-TI and how it could be used to estimate cost-effectiveness over a 20-year time horizon, it was applied to a hypothetical treatment scenario. Results illustrate how a relatively costly intervention with only modest effects can still be cost-effective in the long term.

CONCLUSIONS

AnoMod -TI can be used to examine long-term cost-effectiveness of various interventions aimed at either treating AN or preventing relapse from a state of partial or full remission. AnoMod-TI is freely available upon request to the authors.

Influence of early maternal separation on susceptibility to the activity-based anorexia model in male and female Sprague Dawley rats

A principal animal paradigm employed in Anorexia Nervosa (AN) study is the activity-based anorexia (ABA) model. The model's efficacy in recapitulating the core features of AN in humans allows for the study of the parameters involved in the disorder. The current study examined the susceptibility to the ABA protocol in the presence of a significant stressor (maternal separation) in male and female Sprague Dawley rats. More importantly, we analysed the sex-differences on activity levels during different periods of the ABA protocol to determine the period(s) influencing the most pathological weight loss. Both components of the ABA protocol contributed to the subjects' bodyweight loss. Stress in the first two weeks of development conferred a protective effect in males. Time spent and activity levels on the running wheel were higher in females compared to males. Hyperactivity in ABA subjects was observed during the food-anticipatory activity (FAA) and postprandial activity in males and during the FAA and nocturnal activity periods in females. This study aids in understanding the effect of intensity of activity during specific periods on the pathological weight loss in ABA rats. These observations are informative for therapies aimed at ameliorating body mass index in AN patients.

A qualitative evaluation of team and family perceptions of family-based treatment delivered by videoconferencing (FBT-V) for adolescent Anorexia Nervosa during the COVID-19 pandemic

BACKGROUND

During the COVID-19 pandemic, outpatient eating disorder care, including Family-Based Treatment (FBT), rapidly transitioned from in-person to virtual delivery in many programs. This paper reports on the experiences of teams and families with FBT delivered by videoconferencing (FBT-V) who were part of a larger implementation study.

METHODS

Four pediatric eating disorder programs in Ontario, Canada, including their therapists (n = 8), medical practitioners (n = 4), administrators (n = 6), and families (n = 5), participated in our study. We provided FBT-V training and delivered clinical consultation. Therapists recorded and submitted their first four FBT-V sessions. Focus groups were conducted with teams and families at each site after the first four FBT-V sessions. Focus group transcripts were transcribed verbatim and key concepts were identified through line-by-line reading and categorizing of the text. All transcripts were double-coded. Focus group data were analyzed using directed and summative qualitative content analysis.

RESULTS

Analysis of focus group data from teams and families revealed four overarching categories-pros of FBT-V, cons of FBT-V, FBT-V process, and suggestions for enhancing and improving FBT-V. Pros included being able to treat more patients and developing a better understanding of family dynamics by being virtually invited into the family's home (identified by teams), as well as convenience and comfort (identified by families). Both teams and families recognized technical difficulties as a potential con of FBT-V, yet teams also commented on distractions in family homes as a con, while families expressed difficulties in developing therapeutic rapport. Regarding FBT-V process, teams and families discussed the importance and challenge of patient weighing at home. In terms of suggestions for improvement, teams proposed assessing a family's suitability or motivation for FBT-V to ensure it would be appropriate, while families strongly suggested implementing hybrid models of FBT in the future which would include some in-person and some virtual sessions.

CONCLUSION

Team and family perceptions of FBT-V were generally positive, indicating acceptability and feasibility of this treatment. Suggestions for improved FBT-V practices were made by both groups, and require future investigation, such as examining hybrid models of FBT that involve in-person and virtual elements. Trial registration ClinicalTrials.gov NCT04678843 .

Morphing analysis of facial emotion recognition in anorexia nervosa: association with physical activity

PURPOSE

Anorexia Nervosa (AN) has been linked to emotion processing inefficiencies, social cognition difficulties and emotion dysregulation, but data on Facial Emotion Recognition (FER) are heterogenous and inconclusive. This study aims to explore FER in patients with AN using a dynamic and ecological evaluation, and its relationship with Physical Activity (PA), an important aspect of AN that could impact emotional processing.

METHODS

Sixty-six participants (33 patients with AN and 33 healthy controls) performed a morphed facial emotional recognition task and 49 of them wore an accelerometer during seven days to assess PA. Axis-I disorders and depressive symptoms have been assessed.

RESULTS

No difference was found regarding time to recognize facial emotions. However, patients with AN correctly recognize emotions more frequently than controls. This was specific to disgust, although there was also a tendency for sadness. Among patients, higher depressive scores are associated with a faster and more accurate recognition of disgust, while a higher level of PA is associated to decreased accuracy in recognizing sadness.

CONCLUSION

Patients with AN are capable of recognizing facial emotions as accurately as controls, but could have a higher sensitivity in recognizing negative emotions, especially disgust and sadness. PA has opposite effects and, thus, could be considered as an emotional regulation strategy against negative affect.

LEVEL OF EVIDENCE II

Controlled trial without randomization.

Severe and Enduring' Stage in Anorexia Nervosa: Comparing Eating Attitudes, Impairment and Associated Psychopathology

This study aimed to assess differences in eating attitudes, impairment, and related psychopathology at treatment presentation for patients with "Non-severe and enduring Anorexia Nervosa" (illness duration of <7 years) and patients with "severe and enduring Anorexia Nervosa" (illness duration of 7 years or more). One hundred and thirty-nine patients diagnosed with Anorexia Nervosa participated in this study. Participants were interviewed with the Eating Disorder Examination (EDE) and asked to complete several questionnaires at the end of the first treatment appointment. We also explored differences at treatment presentation by considering alternative criteria to define groups, namely a composite of illness duration and clinical impairment (≥16 CIA total score). No differences were found when comparing participants based on illness duration. However, when participants were classified into a different classification scheme: "Non-severe and enduring Anorexia Nervosa" (illness duration <7 years and a CIA total score <16) vs. "severe and enduring Anorexia Nervosa" (illness duration ≥7 years and CIA total score ≥16), significant differences were found in terms of eating pathology, depressive symptomatology, psychological distress, and emotion dysregulation. Further research is needed to better understand the role of illness duration and clinical impairment in informing the course of AN.

Adaptation and validation of the Caregiver Burden Inventory in eating disorders

BACKGROUND

Living with people diagnosed with a mental disorder is known to increase the risk of developing high levels of so-called "caregiver burden" in informal caregivers. In-depth analysis of this phenomenon and specific assessment tools for caregivers of patients diagnosed with Eating Disorders (EDs) are lacking. In this study, we aimed to evaluate the psychometric properties of the Caregiver Burden Inventory in EDs and employ this adapted tool in this category of caregivers.

METHODS

A cross-sectional study was conducted in the Eating Disorders outpatient unit of an Italian University hospital. Face and content validity were investigated by calculating standard Content Validity Indices (CVI-I and CVI-S) after administering the Inventory to 6 expert nurses with at least 5 years of experience in mental health services assisting people diagnosed with Eating Disorders. Internal consistency was evaluated with Cronbach's α coefficient for the overall scale and subscales. An exploratory factor analysis (EFA) was performed to explore latent constructs. The adapted CBI was then administered to 62 informal caregivers of ED patients.

RESULTS

The EFA yielded a 5-factor structure. The CVI-S was 97.2%; the Cronbach α coefficient was 0,90 (> 0.74 in each subscale). The median burden level in the experimental population was 40.0 [range = 21 to 54], in a theoretical range from 0 (no burden) to 96 (highest level of burden).

CONCLUSION

The Caregiver Burden Inventory appears to be a valid and reliable instrument to assess caregiver burden in individuals diagnosed with Eating Disorders. Further research is needed to evaluate this tool's efficiency in improving individually tailored interventions on families.

Avoidant Attachment Style Moderates the Recovery of Healthy Sexuality in Women With Anorexia Nervosa Treated With Enhanced Cognitive Behavior Therapy (CBT-E): A 2-Year Follow-Up Study

BACKGROUND

Insecure Attachment style has been associated with interpersonal problems in persons with Anorexia Nervosa (AN), and it might moderate the recovery of healthy sexuality in these subjects.

AIM

The aim of the present 2-year follow-up study was to evaluate the role of insecure attachment style as a moderator of the recovery of healthy sexuality in women with AN.

METHODS

63 Italian women with AN treated with a multidisciplinary approach including Enhanced Cognitive Behavior Therapy were evaluated by means of a clinical interview and self-administered questionnaires. Individual psychotherapy sessions were administered by experienced psychotherapists over the course of at least 40 weeks (median number of sessions = 43, range: 38-50); trained dieticians provided personalized nutritional counselling to facilitate weight recovery. The assessment was performed at baseline (T0) and after 1 (T1) and 2 (T2) years.

OUTCOMES

The administered questionnaires investigated general psychopathology (SCL-90-R), eating disorder-specific psychopathology (EDE-Q), female sexuality (FSFI) and adult attachment style (ECR).

RESULTS

At baseline, avoidant attachment style was associated with all domains of sexual dysfunction. Longitudinal analysis showed a significant decrease in both eating disorder-specific psychopathology and sexual dysfunctions at follow-up evaluations. However, only 45% of remitted subjects also recovered healthy sexuality: these women reported significantly lower avoidance scores than those who only recovered from AN. Moderation analysis indicated that sexual desire did not increase in participants with higher levels of avoidant attachment.

CLINICAL IMPLICATIONS

These novel findings highlighted the importance of the assessment of adult attachment in the clinical setting, for better characterization and treatment of persons suffering from AN.

STRENGTHS & LIMITATIONS

The long follow-up duration, the multidisciplinary nature of the treatment, and the novelty of the topic were major strengths of the study, whereas the limited sample size and the absence of biological data were the main limitations.

CONCLUSION

This study highlighted the crucial role of avoidant attachment in the relationship between AN and sexual dysfunctions, underlining the importance of integrating treatments with attachment-focused interventions. Cassioli E, Rossi E, Vizzotto C, et al. Avoidant Attachment Style Moderates the Recovery of Healthy Sexuality in Women With Anorexia Nervosa Treated With Enhanced Cognitive Behavior Therapy (CBT-E): A 2-Year Follow-Up Study. J Sex Med 2022;19:347-355.

Attachment status is associated with gray matter recovery in adolescent anorexia nervosa: Findings from a longitudinal study

The aim of the present study was to investigate whether grey matter (GM) reductions in acute anorexia nervosa (AN) are (i) valid for adolescents (age 14–18 years), (ii) reversible following short‐term psychotherapeutic and nutritional therapy and (iii) depend on psychological components like attachment trauma. 3T MRI including a high‐resolution T1 MPRAGE was performed in 22 female adolescents in the acute state of AN (age: 15.2 ± 1.2 years) and after weight restoration (duration: 2.6 ± 1 months, n = 18) and compared with 18 gender‐matched healthy controls. The Adult Attachment Projective Picture System was used to classify resolved and unresolved attachment patterns. GM decreases were localized in extensive cortical areas including the insula, prefrontal and cingulate cortices as well as subcortical regions during acute AN, which partially increased after therapy with a relative sparing of the hippocampus and parahippocampal gyrus. The resolved group showed more GM recovery in regions of the left hippocampus and parahippocampal gyrus, bilateral cerebellar regions, right precuneus and adjacent cingulate cortices relative to the unresolved pattern. Structural anomalies in adolescent AN that recovered after treatment may be primarily the consequence of malnutrition, whereas several regions did not display significant recovery. Attachment status seems to influence region‐specific GM recovery.

Impact of eating disorders on paid or unpaid work participation and performance: a systematic review and meta-analysis protocol

BACKGROUND

Eating disorders (ED) can reduce quality of life by limiting participation and performance in social and occupational roles, including paid or unpaid work. The association between ED pathologies and work participation and performance must be well understood to strengthen vocational rehabilitation programmes and prevent occupational disruptions in the ED population. The aims of this study are: (1) to examine the degree of association between ED pathologies and work participation and performance in 15-year-olds and older; (2) to highlight the specific ED symptoms that are most correlated with changes in work performance and participation; (3) to compile the most common metrics and assessments used to measure work participation and performance with ED.

METHODS

Medline, Embase, CINAHL, Web of Science, PsycINFO, and Cochrane Library will be searched for observational and experimental studies that meet the following criteria: (1) a clinical sample of typical or atypical ED; (2) paid or unpaid employment or training; (3) an association between ED pathologies and work participation or performance. Unpublished data will also be examined. Title and abstract, and full-text screening will be conducted in duplicate. Risk of bias and quality of evidence assessments will be completed. A random-effect meta-analysis will be performed.

DISCUSSION

This synthesis can clarify knowledge and gaps around the impact of ED on work functioning, thereby allowing better evaluation, improvements and development of current workplace assessments, interventions, and policies.

TRIAL REGISTRATION

The registration number for this systematic review on PROSPERO is CRD42021255055.

To Improve the Initial Inpatient Management of Adolescents Admitted with Severe Anorexia Nervosa: A Narrative Review and a Convenient Protocol

Inadequate nutritional rehabilitation of severely malnourished adolescents with Anorexia Nervosa (AN) increases the risk of medical complications. There is no consensus on best practices for inpatient nutritional rehabilitation and medical stabilization for severe AN. This study aimed to elaborate an admission protocol for adolescents with severe AN based on a comprehensive narrative review of current evidence. A Pubmed search was conducted in July 2017 and updated in August 2020, using the keywords severe AN or eating disorders (ED), management guidelines and adolescent. Relevant references cited in these guidelines were retrieved. A secondary search was conducted using AN or ED and refeeding protocol, refeeding syndrome (RS), hypophosphatemia, hypoglycemia, cardiac monitoring or cardiac complications. Evidence obtained was used to develop the admission protocol. Selective blood tests were proposed during the first three days of nutritional rehabilitation. Higher initial caloric intake is supported by evidence. Continuous nasogastric tube feeding was proposed for patients with a BMI < 12 kg/m2. We monitor hypoglycemia for 72 h. Continuous cardiac monitoring for bradycardia <30 BPM and systematic phosphate supplementation should be considered. Developing protocols is necessary to improve standardization of care. We provide an example of an inpatient admission protocol for adolescents with severe AN.

'In an otherwise limitless world, I was sure of my limit.'† Experiencing Anorexia Nervosa: A phenomenological metasynthesis

Anorexia Nervosa (AN) has the highest mortality rate of the mental disorders, with still less than 50% of affected individuals achieving recovery. Recent calls to bring innovative, empirical research strategies to the understanding of illness and its core psychopathological features highlight the need to address significant paucity of efficacious treatment. The current study brings a phenomenological approach to this challenge, synthesizing lived experience phenomena as described by qualitative literature. Fifty-three studies published between the years 1998 and 2021 comprising a total of 1557 participants aged 12-66 suffering from AN or sub-threshold AN are included. Reciprocal and refutational analysis generated six key third-order constructs: "emotion experienced as overwhelming," "identity," "AN as a tool," "internal conflict relating to Anorexia," "interpersonal communication difficulties" and "corporeality." Twenty-six sub-themes were identified, the most common being fear, avoidance, AN as guardian/protector, and AN as intertwined with identity. Some themes associated with current treatment models such as low self-esteem, need for social approval and feelings of fatness were less common. We highlight the significant role of intense and confusing emotion in AN, which is both rooted in and engenders amplified fear and anxiety. Restrictive eating functions to numb these feelings and withdraw an individual from a chaotic and threatening world whilst providing a sense of self around which to build an illness identity. Results have implications for therapeutic practice and overly protective weight and shape focused medical treatment models, which may serve to reinforce the disease.

Predictors of non-completion of a day treatment program for adults with eating disorders

Although treatment dropout is common among patients with eating disorders, very few studies have examined predictors of non-completion in day treatment. We investigated various potential predictors of dropout from adult day treatment. Participants were 295 adult patients with a diagnosis of Anorexia Nervosa (restricting or binge-eating/purging subtype), Bulimia Nervosa (BN), Other Specified Feeding or Eating Disorder, or Avoidant Restrictive Food Intake Disorder. Predictors included eating-disorder characteristics, motivation at the commencement of treatment, Body Mass Index (BMI), time spent in treatment and personality dimensions. Logistic regression analyses showed that for patients with a BMI of less than 20 at the start of treatment, low BMI was a significant predictor of staff-initiated termination due to not meeting weight gain goals. Furthermore, completing less than 6 weeks of treatment was associated with staff-initiated termination. For the whole sample, those with higher changes in weight over the course of treatment were less likely to terminate prematurely. None of the other predictor variables yielded significant results. Results of the current study highlight characteristics of patients who are more likely not to complete day treatment and can help identify patients who may be at risk for not succeeding in multi-diagnostic day treatment programs.

Widening the reach of family-based interventions for Anorexia Nervosa: autism-adaptations for children and adolescents

Family-based interventions are widely recommended as a first line treatment for children and young people with Anorexia Nervosa. There is clear evidence that model-adherent delivery of specific eating disorder focused family interventions has the potential to help adolescents with Anorexia Nervosa, who have typically engaged in extreme dietary restriction and lost a significant amount of weight over a relatively short period of time. Nevertheless, there remains a significant number of young people with restrictive eating disorders for whom family-based interventions for Anorexia Nervosa prove less effective, suggesting adaptations may be indicated for some. In this paper we provide a rationale and structure for considering a number of possible adaptations to the delivery of family-based therapy for anorexia nervosa specifically intended to enhance its relevance and potential effectiveness for children and adolescents on the autism spectrum; a subgroup known to represent a significant minority in eating disorder populations who have been identified as having relatively poor outcomes. Past research has shown that certain family-based treatments are effective for many children and adolescents who develop Anorexia Nervosa. At the same time this type of treatment approach in its current form does not work for everyone. Recent research has highlighted the overlap between anorexia and autism and the need for the development of adaptations to existing treatments to better meet the requirements of people on the autism spectrum who develop anorexia. With this in mind we propose a number of autism-related adaptations that could be made to family-based treatments for anorexia. We hope that these might be formally tested in the future to see if these adaptations improve outcomes for this group of individuals.

Social cognition in female adults with Anorexia Nervosa: A systematic review

Deficits in interpersonal and social functioning are well established in females with Anorexia Nervosa (AN), and are thought to be key features involved in the onset and maintenance of the disease. Growing literature suggests these may be attributed to poor social cognitive processes. This systematic review evaluates whether differences in social cognition exist in adult females with AN. A total of 32 studies that compared females with AN against a healthy control group using social cognitive measures and/or questionnaires were analysed. The majority of studies were deemed to have a low or moderate risk of bias. Overall, empathy appears to be intact in AN, however greater emotion regulation difficulties, elevated alexithymia and reduced emotional awareness are evident in AN. Findings relating to emotion recognition and emotional Theory of Mind were inconsistent. The nature of the task appeared to influence the domains of cognitive ToM and social perception, warranting further research. These findings are discussed within the broader context of social cognitive models and AN rehabilitation.

Health-related quality of life assessment in eating disorders: adjustment and validation of a specific scale with the inclusion of an interpersonal domain

PURPOSE

Quality of life is a fundamental aspect of both clinical practice and research on eating disorders (ED) due to the significant impacts these disorders have on everyday life. Disorder-specific scales can improve the quality of research and findings and offer greater sensitivity and responsiveness. However, no specific instrument is available in Italian for ED. The aim of this paper is to adjust and to validate a reliable scale with specific items regarding physical and interpersonal well-being.

METHODS

The Italian version of the Eating Disorder Quality of Life (IEDQOL) scale was developed, on the basis of the original English scale, with the addition of items pertaining to physical well-being and interpersonal interactions. In this study, 180 ED patients and 190 healthy controls from the community were enrolled both from inpatient units and outpatient services. A statistical analysis with an exploratory factorial approach was performed in order to validate the tool.

RESULTS

The results showed that the IEDQOL has very good psychometric properties with test-retest validity and sensitivity between patients and controls (d = 2.17 for total score). Moreover, the interpersonal domain showed excellent psychometric values (Cronbach's α > 0.70 in all the subgroups) and a robust correlation with other quality of life constructs.

CONCLUSION

Future studies on the Italian population should use IEDQOL as outcome element that can be useful also with other disorder-specific psychopathological constructs and corroborate the reliability of the data. Future research in the ED field should only use this specific tool.

LEVEL OF EVIDENCE

Case-control analytic study, Level III.

Yoga as adjunctive therapy in the treatment of people with anorexia nervosa: a Delphi study

BACKGROUND

There is preliminary evidence to suggest that yoga can be beneficial in reducing anxiety, depression and general eating disorder symptoms in people with Anorexia Nervosa (AN). It is unclear whether the therapeutic benefits of yoga are supported or utilised in the treatment of AN amongst clinical experts. The present study aimed to explore and synthesise expert opinion on the use of yoga as an adjunctive therapy in the management of anxiety, depression and over-exercise in individuals with AN.

METHODS

A Delphi methodology was employed, with clinicians considered experts in the treatment of AN recruited internationally to form the panel (n = 18). The first iteration of questionnaires comprised of four open-ended questions concerning the experts' understanding of the term yoga and opinions on its' use in therapy generally and more specifically in the treatment of AN. Using content analysis, statements were derived from this data and included as Likert-based items in two subsequent rounds where panellists rated their level of agreement on each item. Seventeen out of 18 respondents completed all three iterations.

RESULTS

Consensus (level of agreement defined at ≥ 85%) was achieved for 36.47% of the items included in the second and third rounds. The panel reached consensus on items defining yoga and pertaining to its' general benefits. The panel agreed that yoga is a adjunct therapy for various problems, consensus was not achieved on the specific use of yoga as an adjunct therapy in the treatment of comorbid anxiety, depression or trauma in patients with AN. Although the expert panel acknowledged a number of benefits for use of yoga in AN, they strongly endorsed that future research should evaluate the potential risks of using yoga as an embodied practice.

CONCLUSIONS

It is possible that yoga could be considered for inclusion in future guidelines if supported by empirical research. We conclude that there seems to be enough consensus that such further scientific investigation is warranted. This study aimed to explore expert opinion on the use of yoga as an adjunctive therapy in the management of anxiety, depression and over-exercise in individuals with Anorexia Nervosa (AN). Clinicians considered experts in the treatment of AN recruited internationally to form the panel (n = 18). Experts were asked about their understanding of the term yoga and their opinions on its' use in therapy. The panel reached consensus on items defining yoga and pertaining to its' general benefits. Although the panel agreed that yoga is a nice additional therapy for various problems, consensus was not achieved on the use of yoga as an additional therapy in the treatment of specific problems like anxiety, depression or trauma in people with AN. The expert panel acknowledged a number of benefits for use of yoga in AN. However the panel strongly considered that future research should evaluate the potential risks of using yoga as an embodied practice. The areas of collective agreement gained in the study can serve as preliminary guidelines for the use of yoga in AN whilst guiding future research directions.

Time Course of Relapse Following Acute Treatment for Anorexia Nervosa

OBJECTIVE

There is long-standing interest in how best to define stages of illness for anorexia nervosa, including remission and recovery. The authors used data from a previously published study to examine the time course of relapse over the year following full weight restoration.

METHODS

Following weight restoration in an acute care setting, 93 women with anorexia nervosa were randomly assigned to receive fluoxetine or placebo and were discharged to outpatient care, where they also received cognitive-behavioral therapy for up to 1 year. Relapse was defined on the basis of a priori clinical criteria. Fluoxetine had no impact on the time to relapse. In the present analysis, for each day after entry into the study, the risk of relapse over the following 60 days and the following 90 days was calculated and a parametric function was fitted to approximate the Kaplan-Meier estimator.

RESULTS

The risk of relapse rose immediately after entry into the study, reached a peak after approximately 60 days, and then gradually declined. There was no indication of an inflection point at which the risk of relapse fell precipitously after the initial peak.

CONCLUSIONS

This analysis highlights the fact that adult patients with anorexia nervosa are at increased risk of relapse in the first months following discharge from acute care, suggesting a need for frequent follow-up and relapse prevention-focused treatment during this period. After approximately 2 months, the risk of relapse progressively decreases over time.

A novel 'practical body image' therapy for adolescent inpatients with anorexia nervosa: a randomised controlled trial

PURPOSE

To determine the potential effectiveness of a novel 10-week manualised Practical Body Image therapy (PBI) with mirror exposure (ME), when used as an adjuvant to an intensive treatment package (TAU) in adolescent inpatients with Anorexia Nervosa (AN). To evaluate the effectiveness of ME in an adolescent population.

METHODS

Using a randomised control design, 40 girls aged 11-17 years with AN were assigned to PBI with TAU (n = 20) and TAU alone (n = 20). Both groups completed self-report measures of body image at week 1 and week 10 of the study to measure the potential effectiveness of PBI. The PBI group completed measures at week 7 to evaluate the ME component.

RESULTS

31 participants completed the study; 16 TAU, 15 PBI. PBI participants had greater improvement in all outcomes than TAU participants. Medium effect sizes were seen for self-reported weight concern, body image avoidance in terms of clothing and body image anxiety. ME produced effect sizes in self-reported body image avoidance in terms of clothing and grooming that were greater than 0.40, n = 14.

CONCLUSION

The findings demonstrate that PBI supports an intensive inpatient treatment package and addresses elements of negative body image. PBI was beneficial for addressing body image dissatisfaction with improvements in weight concerns, body image avoidance and physical appearance trait anxiety following the ME component. The magnitude of the effect sizes is comparable to previous studies. Positive qualitative feedback indicated the intervention was acceptable to users. PBI is a promising new adjuvant treatment for AN.

EMB RATING

Level I: randomized controlled trial.

Increased early motivational response to food in adolescent anorexia nervosa revealed by magnetoencephalography

BACKGROUND

It remains unclear to what extent reduced nutritional intake in anorexia nervosa (AN) is a consequence of a reduced motivational response to food. Although self-reports typically suggest AN patients have a reduced appetitive response, behavioral and neurophysiological measures have revealed evidence for both increased and reduced attentional biases towards food stimuli. The mechanisms influencing food perception in AN, might be clarified using time-sensitive magnetoencephalography (MEG) to differentiate the early (more automatic processing) stages from the late (more controlled) stages.

METHODS

MEG was recorded in 22 partially weight-restored adolescent AN patients and 29 age- and gender-matched healthy control (HC) participants during a rapid serial visual presentation paradigm using 100 high-calorie food, 100 low-calorie food, and 100 non-food pictures. Neural sources of event-related fields were estimated using the L2-Minimum-Norm method and analyzed in early (50-300 ms) and late (350-500 ms) time intervals.

RESULTS

AN patients rated high-calorie food as less palatable and reported overall less food craving than HC participants. Nevertheless, in response to food pictures AN patients showed relative increased neural activity in the left occipito-temporal and inferior frontal regions in the early time interval. No group differences occurred in the late time interval.

CONCLUSIONS

MEG results speak against an overall reduced motivational response to food in AN. Instead, relative increased early food processing in the visual cortex suggests greater motivated attention. A greater appetitive response to food might be an adaptive mechanism in a state of undernourishment. Yet, this relative increased food processing in AN was no longer present later, arguably reflecting rapid downregulation.

Adapting and adopting highly specialized pediatric eating disorder treatment to virtual care: a protocol for an implementation study in the COVID-19 context

BACKGROUND

The COVID-19 pandemic has negatively impacted individuals with eating disorders; resulting in increased symptoms, as well as feelings of isolation and anxiety. To conform with social distancing requirements, outpatient eating disorder treatment in Canada is being delivered virtually, but a lack of direction surrounding this change creates challenges for practitioners, patients, and families. As a result, there is an urgent need to not only adapt evidence-based care, including family-based treatment (FBT), to virtual formats, but to study its implementation in eating disorder programs. We propose to study the initial adaptation and adoption of virtual family-based treatment (vFBT) with the ultimate goal of improving access to services for youth with eating disorders.

METHODS

We will use a multi-site case study with a mixed method pre/post design to examine the impact of our implementation approach across four pediatric eating disorder programs. We will develop implementation teams at each site (consisting of therapists, medical practitioners, and program administrators), provide a remote training workshop on vFBT, and offer ongoing consultation during the initial implementation phase. Therapists will submit videorecordings of their first four vFBT sessions. We propose to study our implementation approach by examining (1) whether the key components of standard FBT are maintained in virtual delivery measured by therapist self-report, (2) fidelity to our vFBT model measured by expert fidelity rating of submitted videorecordings of the first four sessions of vFBT, (3) team and patient/family experiences with vFBT assessed with qualitative interviews, and (4) patient outcomes measured by weight and binge/purge frequency reported by therapists.

DISCUSSION

To our knowledge, this is the first study to evaluate an implementation strategy for virtually delivered FBT for eating disorders. Challenges to date include confirming site participation and obtaining ethics approval at all locations. This research is imperative to inform the delivery of vFBT in the COVID-19 context. It also has implications for delivery in a post-pandemic era where virtual services may be preferable to patients and families living in remote locations, where access to specialized services is extremely limited.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04678843 , registered on December 21, 2020.

Are poor set-shifting and central coherence associated with everyday function in anorexia nervosa? A systematic review

BACKGROUND

There is increasing interest in associations between cognitive impairments and clinical symptoms in Anorexia Nervosa (AN), however, the relationship with everyday function is unclear. The current review synthesizes existing data regarding associations between scores on tests of set-shifting and central coherence and functional outcome measures for individuals with AN.

METHOD

A systematic electronic database search yielded 13 studies which included participants with current or lifetime AN where scores on a neuropsychological test of set-shifting or central coherence were directly or indirectly compared to a functional outcome measure.

RESULTS

Associations between set-shifting and central coherence performance measures and functional outcomes were limited in number and noted only in adult or mixed-age cohorts. Associations were noted at subscale level, suggesting they are specific in nature. In younger cohorts, assessments of executive functioning in everyday life appear sensitive to cognitive-behavioral flexibility issues.

CONCLUSIONS

Associations between cognitive performance and functional outcome have not been as systematically assessed in AN as in other psychiatric disorders. Key factors to address in future research include: (a) the use of function measures which are sensitive to both the level of impairment, and specific rather than general impairments (b) the ecological validity of measures, (c) the task impurity problem, especially in regard to cognitive flexibility assessment, and (d) the need to measure both cognitive deficits and strengths, because tests of specific cognitive processes may underestimate the ability to function in daily life due to compensatory strategies.

Exploring mentalizing in adolescents with anorexia nervosa and borderline personality disorder: A comparative study of psychiatric inpatients and healthy controls

Background:

Impaired mentalizing, i.e., difficulties in understanding oneself and others in terms of mental states, has been associated with the development of Anorexia Nervosa (AN), mainly among adults. However, few studies have addressed this question in clinical samples of adolescents with AN. Moreover, no study has explored mentalizing abilities among inpatient adolescents presenting with AN and Borderline Personality Disorder (BPD), despite their high comorbidity in a highly relevant age group.

Objective:

This study attempted, for the first time, to further examine differences in mentalizing abilities and to identify specific mentalizing impairments in different psychiatric inpatient groups and healthy adolescents.

Methods:

Using samples of female adolescents aged 12–17, comparison analyses were performed between psychiatric inpatient adolescents with AN (n = 44), BPD (n = 101), AN+BPD (n = 48), other psychopathology (n = 163) and healthy adolescents (n = 129). Structured and semi-structured clinical interviews, and two experimental tasks were administered to assess AN, BPD and mentalizing, respectively.

Results:

Comparison analyses showed that patients with BPD and other psychiatric disorders evidenced higher levels of hypermentalizing compared to healthy adolescents. Hypermentalizing was also reported among inpatients with AN+BPD, although to a lesser extent. BPD and AN scores were positively correlated with hypermentalizing responses.

Conclusions:

Our results suggest that hypermentalizing is a specific mentalization impairment in inpatient adolescents, particularly with BPD and both AN+BPD. Further investigation into the efficacy of mentalization based treatments for adolescents with BPD and AN+BPD is recommended. Prospective studies are needed to assess mentalizing using experimental tasks among adolescents with AN, taking into account the potential influence of temporality and severity of the disorders’ symptoms.

Non-suicidal self-injury in patients with eating disorders: nuclear aspects

Background:

Through the culture of thinness, increasingly promoted in our society as a beauty canon, it is not surprising that the number of people affected by eating disorders is increasing.

Objective:

This research aims to study the relationship between non-suicidal self-injuries and nuclear aspects of eating disorders specified along with this article.

Methods:

The sample consisted of 60 women diagnosed with anorexia and bulimia. Questionnaires assessing impulsivity, body satisfaction, alexithymia, body attitude and self-esteem were administered. Participants with non-suicidal self-harm were compared with those without it, and participants with anorexia with and without self-harm and participants with bulimia with and without self-harm were compared.

Results:

Differences were found in body dissatisfaction= 5.71; p ≤0.01), body attitudes= 4.80; p ≤0.02), self-esteem= 14.09; p ≤0.00) and impulsivity (t= 3.39; p ≤0.01) between participants with and without non-suicidal self-harm.

Conclusions:

These are key factors for the clinical area in the treatment of eating disorders to prevent the presence of self-harm, as it allows focusing the treatment target on those aspects such as dissatisfaction and impulsivity, which are key in the development of self-harm.

Potential shortcomings in current studies on the effect of intranasal oxytocin in Anorexia Nervosa and healthy controls - A systematic review and meta-analysis

RATIONALE

The psychopathology of anorexia nervosa (AN) includes altered social cognition and information processing of fear and anxiety. Oxytocin, a neuromodulating hormone, may influence these functions and could be valuable for the treatment of AN.

OBJECTIVE

The current study aimed at reviewing the effect of intranasal oxytocin (IN-OT) on attentional bias (AB) and emotion recognition (ER) in AN.

METHODS

A systematic literature review was done for free-text and the MeSH-terms: anorexia nervosa, feeding and eating disorders, and oxytocin. Six publications, reporting from 4 unique clinical trials, were included in this review. A meta-analysis was conducted to examine the effects of IN-OT on AB towards food images and ER on healthy controls (HC) and patients with AN.

RESULTS

Overall, IN-OT did not influence AB towards food images (effect size = 0.20 [- 0.16, 0.57], p = 0.28) and had no effect on ER (effect size = - 0.01 [- 0.27, 0.26], p = 0.97) in patients with AN and healthy control (HC) subjects collectively. Assessing HC and AN separately in subgroup analyses did not show any significant effect on AB and ER in neither of the subgroups. All tests were done between 15 and 55 min post-administration of IN-OT, while peak concentration in the cerebrospinal fluid has been determined to be at 75 min.

CONCLUSION

The current level of evidence is moderate showing no effect of IN-OT on AB or ER in AN. However, brain exposure may not have been sufficient which future studies with IN-OT need to ensure by considering dose and dose-to-task interval.

[Early onset anorexia nervosa]

Early onset anorexia nervosa. Anorexia nervosa is an eating disorder of multifactorial origin. It has a serious physical and psychological impact on the functioning of the individual and the highest risk of mortality from psychiatric disorders. It is defined according to international classifications by a refusal to maintain a normal minimum weight for his age and height, an intense fear of gaining weight and a disturbance of one's body image. This pathology most often affects adolescents but can be diagnosed from the age of 8 years. In this case, it is considered as "early onset anorexia nervosa" or called "prepubescent anorexia nervosa". Its prognosis is serious, and it requires emergency medical care. Multidisciplinary ambulatory care should be favored in the absence of criteria imposing full-time hospitalization. Patient monitoring should continue for several years.