Bone resorption is decreased postprandially by intestinal factors and glucagon-like peptide-2 is a possible candidate

TY - JOUR

T1 - Bone resorption is decreased postprandially by intestinal factors and glucagon-like peptide-2 is a possible candidate

AU - Holst, Jens Juul

AU - Hartmann, Bolette

AU - Gottschalck, Ida B

AU - Jeppesen, Palle B

AU - Miholic, Johannes

AU - Henriksen, Dennis Bang

PY - 2007/7

Y1 - 2007/7

N2 - OBJECTIVE: Food intake inhibits bone resorption by a mechanism thought to involve gut hormones, and the intestinotrophic glucagon-like peptide 2 (GLP-2) is a candidate because exogenous GLP-2 inhibits bone resorption in humans. The purpose of the study was to investigate patients with short-bowel syndrome (SBS) or total gastrectomy in order to elucidate whether the signal for the meal-induced reduction of bone resorption is initiated from the stomach or the intestine.MATERIAL AND METHODS: Bone resorption was assessed from the serum concentration of collagen type I C-telopeptide cross-links (s-CTX) and compared with the plasma concentrations of GLP-2. Bone formation was assessed from serum osteocalcin concentrations. Seven SBS patients with a preserved colon and 7 with SBS and colectomy and 7 healthy controls were given a breakfast test meal (936 kcal). Eight patients who had undergone total gastrectomy had an oral glucose load (75 g in 150 ml).RESULTS: The SBS patients without a colon showed no reduction in bone resorption (s-CTX) to a meal, whereas SBS patients with a colon had an intermediate response with a 27% (p<0.05) reduction of s-CTX from baseline after 120 min as compared with 66% (p<0.001) for normal controls. A significant reduction of 53% (p<0.001) was seen in gastrectomized patients after receiving oral glucose, which is comparable with the published data for the oral glucose tolerance test (OGGT) in healthy subjects (50% reduction over 120 min). Bone formation was unchanged for both SBS and gastrectomy patients. GLP-2 concentrations increased significantly in all groups with the exception of the SBS plus colectomy group.CONCLUSIONS: An intestinal factor is responsible for the postprandial reduction in bone resorption, and our findings are compatible with such a function for GLP-2.

AB - OBJECTIVE: Food intake inhibits bone resorption by a mechanism thought to involve gut hormones, and the intestinotrophic glucagon-like peptide 2 (GLP-2) is a candidate because exogenous GLP-2 inhibits bone resorption in humans. The purpose of the study was to investigate patients with short-bowel syndrome (SBS) or total gastrectomy in order to elucidate whether the signal for the meal-induced reduction of bone resorption is initiated from the stomach or the intestine.MATERIAL AND METHODS: Bone resorption was assessed from the serum concentration of collagen type I C-telopeptide cross-links (s-CTX) and compared with the plasma concentrations of GLP-2. Bone formation was assessed from serum osteocalcin concentrations. Seven SBS patients with a preserved colon and 7 with SBS and colectomy and 7 healthy controls were given a breakfast test meal (936 kcal). Eight patients who had undergone total gastrectomy had an oral glucose load (75 g in 150 ml).RESULTS: The SBS patients without a colon showed no reduction in bone resorption (s-CTX) to a meal, whereas SBS patients with a colon had an intermediate response with a 27% (p<0.05) reduction of s-CTX from baseline after 120 min as compared with 66% (p<0.001) for normal controls. A significant reduction of 53% (p<0.001) was seen in gastrectomized patients after receiving oral glucose, which is comparable with the published data for the oral glucose tolerance test (OGGT) in healthy subjects (50% reduction over 120 min). Bone formation was unchanged for both SBS and gastrectomy patients. GLP-2 concentrations increased significantly in all groups with the exception of the SBS plus colectomy group.CONCLUSIONS: An intestinal factor is responsible for the postprandial reduction in bone resorption, and our findings are compatible with such a function for GLP-2.

KW - Adult

KW - Aged

KW - Bone Resorption

KW - Colectomy

KW - Collagen Type I

KW - Gastrectomy

KW - Gastrointestinal Tract

KW - Glucagon-Like Peptide 2

KW - Humans

KW - Middle Aged

KW - Osteocalcin

KW - Osteogenesis

KW - Peptides

KW - Postprandial Period

KW - Short Bowel Syndrome

U2 - 10.1080/00365520601137272

DO - 10.1080/00365520601137272

M3 - Journal article

C2 - 17558904

SN - 0036-5521

VL - 42

SP - 814

EP - 820

JO - Scandinavian Journal of Gastroenterology

JF - Scandinavian Journal of Gastroenterology

IS - 7

ER -