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

Nematy, M, Brynes, AE, Hornick, PI, Patterson, M, Ghatei, MA, Bloom, SR, Brett, SJ and Frost, GS (2007) Postprandial ghrelin suppression is exaggerated following major surgery; implications for nutritional recovery NUTRITION & METABOLISM, 4. ? - ?. ISSN 1743-7075

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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 preoperatively (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 followup 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.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Life Sciences & Biomedicine, Nutrition & Dietetics, PLACEBO-CONTROLLED TRIAL, PLASMA GHRELIN, FOOD-INTAKE, WEIGHT-LOSS, HUMANS, APPETITE, MEN
Related URLs:
Divisions: Faculty of Health and Medical Sciences > Nutrition and Metabolism
Depositing User: Melanie Hughes
Date Deposited: 18 Nov 2010 12:06
Last Modified: 23 Sep 2013 18:39

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