Altered energy metabolism in anorexia nervosa
Identifieur interne : 000267 ( Main/Curation ); précédent : 000266; suivant : 000268Altered energy metabolism in anorexia nervosa
Auteurs : Janice Russell [Australie] ; Louise A. Baur [Australie] ; Peter J. V Beumont [Australie] ; Suzanne Byrnes [Australie] ; Gaby Gross [Australie] ; Stephen Touyz [Australie] ; Suzanne Abraham [Australie] ; Stephan Zipfel [Allemagne]Source :
- Psychoneuroendocrinology [ 0306-4530 ] ; 2000.
Abstract
Optimal nutritional rehabilitation of anorexia nervosa requires more information concerning actual energy and substrate requirements. To this end, indirect calorimetry was performed in female patients (n=34, age 20.9±1.2 yr, body mass index [BMI] 15.6±0.2 kg/m2; mean±SEM) soon after commencement of refeeding and at the time of discharge from hospital (n=18, BMI 19.0±0.3 kg/m2). Healthy female controls (n=18, age 24.6±1.3 yr, BMI 21.6±0.6 kg/m2) were also tested. Resting energy expenditure (REE) and respiratory quotient (RQ) were measured in the fasting state, followed by diet-induced thermogenesis (DIT) and RQ over a 4 h period following a 100 g oral glucose load. Compared with post-refeeding patients and controls, pre-refeeding patients had a high basal RQ and a low REE, with a paradoxically higher DIT (13.2±0.9% of REE vs 8.3±1.2% and 8.6±0.9% in post-refeeding patients and controls, respectively). RQ values in pre-refeeding patients exceeded unity following the glucose load, probably reflecting net lipogenesis, whereas in the post-refeeding patients, post-glucose RQ was similar to that of controls, suggesting premature curtailment of lipogenesis. These data demonstrate energy wasting in emaciated patients with anorexia nervosa. Biological repair processes could account for disproportionate energy loss early in refeeding and there may be some later impediment to full restoration of fat stores.
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DOI: 10.1016/S0306-4530(00)00036-6
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To this end, indirect calorimetry was performed in female patients (n=34, age 20.9±1.2 yr, body mass index [BMI] 15.6±0.2 kg/m2; mean±SEM) soon after commencement of refeeding and at the time of discharge from hospital (n=18, BMI 19.0±0.3 kg/m2). Healthy female controls (n=18, age 24.6±1.3 yr, BMI 21.6±0.6 kg/m2) were also tested. Resting energy expenditure (REE) and respiratory quotient (RQ) were measured in the fasting state, followed by diet-induced thermogenesis (DIT) and RQ over a 4 h period following a 100 g oral glucose load. Compared with post-refeeding patients and controls, pre-refeeding patients had a high basal RQ and a low REE, with a paradoxically higher DIT (13.2±0.9% of REE vs 8.3±1.2% and 8.6±0.9% in post-refeeding patients and controls, respectively). RQ values in pre-refeeding patients exceeded unity following the glucose load, probably reflecting net lipogenesis, whereas in the post-refeeding patients, post-glucose RQ was similar to that of controls, suggesting premature curtailment of lipogenesis. These data demonstrate energy wasting in emaciated patients with anorexia nervosa. Biological repair processes could account for disproportionate energy loss early in refeeding and there may be some later impediment to full restoration of fat stores.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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