Postprandial ghrelin suppression is exaggerated following major surgery; implications for nutritional recovery

Nematy, M. and Brynes, A. E. and Hornick, P. I. and Patterson, M. and Ghatei, M. A. and Bloom, S. R. and Brett, S. J. and Frost, G. S. (2007) Postprandial ghrelin suppression is exaggerated following major surgery; implications for nutritional recovery. Nutrition and Metabolism, 4.

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Abstract

Meeting patients' nutritional requirements and preventing malnutrition is a challenge following major surgical procedures. The role of ghrelin in nutritional recovery after non-gastrointestinal major surgery is unknown. We used coronary artery bypass grafting (CABG) as an example of anticipated good recovery post major surgery. Seventeen patients undergoing CABG (mean ± SEM: 70.1 ± 2.2 yrs, BMI 29.1 ± 1.4 kg/m2, 15 male) underwent fasting and postprandial (45 mins after standard test breakfast) blood sampling pre-operatively (day 0), post-operatively (day 6) and at follow-up (day 40). Changes in food intake, biochemical and anthropometric markers of nutritional status were recorded. A comparison was made to 17 matched healthy controls (70.6 ± 2.3 yrs, BMI 28.4 ± 1.3 kg/m2). We observed significantly increased post-operative and follow-up fasting ghrelin concentrations compared with pre-operatively (pre-op. 402 ± 42 pmol/L vs post-op. 642 ± 97 pmol/L vs follow-up 603 ± 94 pmol/L) (ANOVA p < 0.05). Significantly exaggerated postprandial suppression of ghrelin was seen postoperatively and continued until follow-up (Δ pre-op. 10 ± 51 pmol/L vs Δ post-op. -152 ± 43 pmol/L vs Δ follow-up -159 ± 65 pmol/L, p < 0.05). This was associated with a 50 reduction in food intake post-op. 4.5 ± 0.5 MJ/D (1076 ± 120 kcal/D) compared with estimated requirements 9.9 ± 0.5 MJ/D (2366 ± 120 kcal/D), leading to a 4 weight loss and a 5 reduction in muscle arm circumference loss over length of follow up. Our data support the hypothesis that prolonged changes in fasting and postprandial plasma ghrelin concentrations are associated with impaired nutritional recovery after CABG. These findings reinforce the need to investigate ghrelin in other patients groups undergoing major surgery. © 2007 Nematy et al; licensee BioMed Central Ltd.

Item Type: Article
Additional Information: Cited By :14 Export Date: 16 February 2020 Correspondence Address: Frost, G.S.; School of Biomedical and Molecular Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom; email: G.Frost@surrey.ac.uk
Uncontrolled Keywords: biological marker ghrelin aged anthropometry arm circumference article blood sampling clinical article coronary artery bypass graft female follow up food intake human major surgery male nutritional status postprandial state preoperative period weight reduction
Subjects: QU Biochemistry
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib7 lib7
Date Deposited: 02 May 2020 05:01
Last Modified: 02 May 2020 05:01
URI: http://eprints.mums.ac.ir/id/eprint/17084

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