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Evaluation of ghrelin level and appetite regulation in patients with acute exacerbations of chronic obstructive pulmonary disease

Authors Wang Y, Shen Y, Zuo Q, Zhao L, Wan C, Tian P, Chen L, Wen F

Received 30 March 2014

Accepted for publication 27 May 2014

Published 14 August 2014 Volume 2014:9(1) Pages 863—870

DOI https://doi.org/10.2147/COPD.S65195

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Ye Wang,1,# Yongchun Shen,1,# Qiunan Zuo,2 Li Zhao,3 Chun Wan,1 Panwen Tian,1 Lei Chen,1 Fuqiang Wen1

1
Department of Respiratory Medicine, West China Hospital of Sichuan University and Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Chengdu, People’s Republic of China; 2Department of Geriatrics, Sichuan Provincial People’s Hospital, Chengdu, People’s Republic of China; 3Department of Respiratory Medicine, Guizhou People’s Hospital, Guizhou, People’s Republic of China

#
These authors contributed equally to this work and share joint first authorship

Background:
Appetite reduction is a major cause of cachexia in acute exacerbations of chronic obstructive pulmonary disease (AECOPD). This study tested the correlation of appetite and circulating levels of acylated ghrelin in patients with AECOPD.
Methods: Thirty-six patients with AECOPD and 23 healthy adults were enrolled in this study. Circulating total ghrelin, acylated ghrelin, and obestatin levels, Simplified Nutritional Appetite Questionnaire (SNAQ) score, and caloric intake were compared in patients and healthy controls. Additionally, the above parameters were compared between admission and discharge in the patients with AECOPD.
Results: Compared with healthy controls, SNAQ scores and caloric intake were significantly lower in patients with AECOPD, but there were no significant differences in total ghrelin, acyl ghrelin, or obestatin levels. In patients with AECOPD, the total ghrelin level was significantly higher at admission than on discharge, the SNAQ score and caloric intake were significantly increased at discharge when compared with admission, and there was no significant difference in acylated ghrelin level between admission and discharge.
Conclusion: We demonstrated lower appetite scores and caloric intake in patients with AECOPD, but could not confirm that these effects were caused by insufficient levels of the orexigenic peptide, acyl ghrelin. Further studies are needed to confirm our findings and to determine the mechanism regulating appetite in patients with AECOPD.

Keywords: ghrelin, appetite, pulmonary disease, chronic obstructive, malnutrition, comorbidities

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