Ghrelin stimulates food intake and growth hormone release in rats with thermal injury: Synthesis of ghrelin

Ghrelin, a 28-residue octanoylated peptide recently isolated from the stomach, exhibits anti-cachectic properties through regulating food intake, energy expenditure, adiposity, growth hormone secretion and immune response. Burn injury induces persistent hypermetabolism and muscle wasting. We therefo...

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Veröffentlicht in:Peptides (New York, N.Y. : 1980) N.Y. : 1980), 2006-07, Vol.27 (7), p.1624-1631
Hauptverfasser: Balasubramaniam, Ambikaipakan, Wood, Steve, Joshi, Rashika, Su, Chunhua, Friend, Lou Ann, Sheriff, Sulaiman, James, J. Howard
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container_end_page 1631
container_issue 7
container_start_page 1624
container_title Peptides (New York, N.Y. : 1980)
container_volume 27
creator Balasubramaniam, Ambikaipakan
Wood, Steve
Joshi, Rashika
Su, Chunhua
Friend, Lou Ann
Sheriff, Sulaiman
James, J. Howard
description Ghrelin, a 28-residue octanoylated peptide recently isolated from the stomach, exhibits anti-cachectic properties through regulating food intake, energy expenditure, adiposity, growth hormone secretion and immune response. Burn injury induces persistent hypermetabolism and muscle wasting. We therefore hypothesized that ghrelin may also play a role in the pathophysiology of burn-induced cachexia. Overall ghrelin expression in the stomach over 10 days after burn was significantly decreased ( p = 0.0003). Total plasma ghrelin was reduced 1 day after burn. Thus, changes in ghrelin synthesis and release may contribute to burn-induced dysfunctions. Ghrelin (30 nmol/rat, i.p.) greatly stimulated 2 h food intake in rats on five separate days after burn and in control rats. On post-burn day 15, plasma growth hormone levels were significantly lower than in controls, and this was restored to normal levels by ghrelin (10 nmol/rat, i.p.). These observations suggest that ghrelin retains its ability to favorably modulate both the peripheral anabolic and the central orexigenic signals, even after thermal injury despite ongoing changes due to prolonged and profound hypermetabolism, suggesting that long-term treatment with ghrelin may attenuate burn-induced dysfunctions.
doi_str_mv 10.1016/j.peptides.2006.02.005
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subjects Animals
Biological and medical sciences
Burn injury
Burns - pathology
Cachexia - pathology
Eating
Food intake
Fundamental and applied biological sciences. Psychology
Ghrelin
Growth hormone
Growth Hormone - pharmacokinetics
Hot Temperature
Male
Models, Biological
Peptide Hormones - biosynthesis
Peptide Hormones - chemistry
Peptide Hormones - metabolism
Peptide Hormones - physiology
Peptides - chemistry
Rats
Rats, Sprague-Dawley
Solid phase synthesis
Stomach - metabolism
Time Factors
Vertebrates: endocrinology
title Ghrelin stimulates food intake and growth hormone release in rats with thermal injury: Synthesis of ghrelin
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