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Activity-based anorexia (ABA) consists of a procedure that involves the simultaneous exposure of animals to a restricted feeding schedule, while free access is allowed to an activity wheel. Under these conditions, animals show a progressive increase in wheel running, a reduced efficiency in food intake to compensate for their increased activity, and a severe progression of weight loss. Due to the parallelism with the clinical manifestations of anorexia nervosa including increased activity, reduced food intake and severe weight loss, the ABA procedure has been proposed as the best analog of human anorexia nervosa (AN). Thus, ABA research could both allow a better understanding of the mechanisms underlying AN and generate useful leads for treatment development in AN.
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http://dx.doi.org/10.1002/0471142301.ns0947s67 | DOI Listing |
Int J Eat Disord
September 2025
Department of Physiology, Monash University, Clayton, Victoria, Australia.
Objective: Converging evidence from neuroimaging studies and genome-wide association study (GWAS) suggests the involvement of prefrontal cortex (PFC) and striatum dysfunction in the pathophysiology of anorexia nervosa (AN). However, identifying the causal role of circuit-specific genes in the development of the AN-like phenotype remains challenging and requires the combination of novel molecular tools and preclinical models.
Methods: We used the activity-based anorexia (ABA) rat model in combination with a novel viral-based translating ribosome affinity purification (TRAP) technique to identify transcriptional differences within a specific neural pathway that we have previously demonstrated to mediate pathological weight loss in ABA rats (i.
Int J Eat Disord
July 2025
University of Technology Sydney, Sydney, Australia.
Objective: Multifamily therapy (MFT) is a unique treatment approach that is growing in popularity for adolescents with anorexia nervosa (AN) and their families. MFT aims to create change through experiential and activity-based content and purposeful use of group processes. Despite growing evidence supporting MFT's efficacy, there is limited understanding of possible mechanisms of change.
View Article and Find Full Text PDFJ Eat Disord
July 2025
Venres Clínicos Unit, College of Psychology, University of Santiago, 15782, Santiago de Compostela, Spain.
Introduction: Anxiety around mealtime continuous to hinder nutritional rehabilitation even after significant weight restoration which undermines recovery with pharmacological and psychological treatments proving to be of little effectiveness. This study explored the anxiolytic effects of wearing a warming vest either during lunchtimes or postlunch rest in comparison to treatment as usual in a sample of AN adolescent patients during nutritional rehabilitation.
Method: 14 consecutive inpatients at a Child and Adolescence Mental Health Unit underwent each of the 3 conditions at lunchtime in random order and separated by 2 days: Treatment as usual, wearing heating vest during lunch time, and wearing heating vest during first 30 min of rest time.
Int J Eat Disord
June 2025
Department of Psychology, University of Western Ontario, London, Ontario, Canada.
Objective: The mechanisms that facilitate prolonged dietary restriction in eating disorders, particularly in the absence of binge eating, remain poorly understood. The activity-based anorexia model and basic science in exercise physiology suggest that moderate to vigorous physical activity leads to reduced energy intake relative to metabolic needs. This reduction in energy intake is even greater when individuals exercise in the fasted, compared to fed, state.
View Article and Find Full Text PDFNeuroscience
August 2025
Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg 405 30 Gothenburg, Sweden. Electronic address:
A high level of physical activity is common in patients with anorexia nervosa and can exacerbate symptoms and recovery prognosis. The underlying cause is not known but is most likely regulated by the brain and may derive from energy deficit. Numerous brain regions are activated by energy deficit, and here we identify the lateral hypothalamus (LH) as one of those brain regions by mapping and chemogenetically controlling activated neurons in this area in the activity-based anorexia (ABA) mouse model.
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