Abstract
Purpose
Abnormalities in appetite hormones have been implicated in bulimia nervosa (BN). Orexigenic hormone asprosin has been reported to be associated with food intake and weight gain, but no relevant studies have yet been reported in BN. This study investigated asprosin concentrations and their association with eating disorder symptoms in patients with BN.
Methods
This study recruited a total of 26 BN patients and 23 healthy controls (HC). Symptom severity for eating disorders, depression, and anxiety was determined by the Eating Disorder Examination Questionnaire 6.0, Beck Depression Inventory, Version 2, and Beck Anxiety Inventory, respectively. In addition, the study employed sandwich enzyme-linked immunoassay technology to determine plasma asprosin and glucose concentrations in all participants.
Results
The results revealed that plasma asprosin concentrations were significantly higher in BN patients than in HC (P = 0.037), but the difference disappeared after adjusting for the covariate BMI (F = 2.685, P = 0.108). Correlation analysis showed that asprosin concentration was positively correlated with overeating (r = 0.451, P = 0.021) and eating loss of control (r = 0.483, P = 0.012) in BN patients. Linear regression analysis indicated that an increase in asprosin concentration was associated with an increase in the times of overeating (F = 6.303, P = 0.019, R2 = 0.208). Multiple linear regression showed that increases in asprosin concentration and BDI-II total score could explain the frequent eating loss of control (F = 5.766, P = 0.009, R2 = 0.334).
Conclusions
The present study is the first report of plasma asprosin concentration in BN patients and found that overeating and eating loss of control increased with the increase of asprosin concentration. Additionally, asprosin level and degree of depression may explain the frequency of loss of control.
Level of Evidence
Level III: Evidence obtained from case–control studies.
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Acknowledgements
The authors of the present study are grateful to all the participants.
Funding
This research was supported by the National Natural Science Foundation of China (82071545), Shanghai Jiao Tong University (YG2022ZD026), Science and Technology Commission of Shanghai Municipality (20Y11906500), Shanghai Municipal Health Commission (2019ZB0201), Shanghai Clinical Research Center for Mental Health (19MC1911100).
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YRH and JC: designed the study, YRH, QK, CC: performed asprosin and glucose measurements and data analysis, JC and QK: recruited patients, YRH, CC and LG: recruited healthy controls. All authors contributed to and approved the final manuscript.
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The study protocol was approved by the Ethics Committee of the Shanghai Mental Health Center (2018–26) and conducted in accordance with the principles of the Declaration of Helsinki.
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All participants in the study signed an informed consent to participate.
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Hu, Y., Kang, Q., Chen, C. et al. Increased plasma asprosin levels are associated with overeating and loss of control in drug-free bulimia nervosa. Eat Weight Disord 27, 2783–2789 (2022). https://doi.org/10.1007/s40519-022-01431-5
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DOI: https://doi.org/10.1007/s40519-022-01431-5