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Abstract Title:

L-arginine supplementation normalizes bone turnover and preserves bone mass in streptozotocin-induced diabetic rats.

Abstract Source:

J Endocrinol Invest. 2009 Jun;32(6):546-51. Epub 2009 May 5. PMID: 19494718

Abstract Author(s):

P Pennisi, G Clementi, A Prato, T Luca, G Martinez, R A Mangiafico, I Pulvirenti, F Muratore, C E Fiore

Article Affiliation:

Department of Internal Medicine, University of Catania, Catania, Italy.

Abstract:

Osteopenia, an important complication of diabetes mellitus, is responsible of an increase in bone fracture and of a delay in fracture healing. The pathogenesis of this complication is unclear, however decreased availability and synthesis of nitric oxide (NO) may be regarded as a possible cause of disregulation of bone turnover. The aim of our study was to evaluate the effect of streptozotocin (STZ)-induced diabetes in the rat on bone mineral density (BMD) and bone turnover. We also examined whether supplementation of L-arginine (which acts as a NO substrate) could be beneficial for bone. After 6 weeks of STZ treatment, diabetic rats showed a significant decrease of BMD in the whole body, at the spine, at the pelvis, and at the femur. Bone turnover evaluation revealed a significant decrease in the serum levels of osteocalcin (a marker of bone formation), and an increase of the serum levels of the C-terminal telopeptide of type I collagen (RatLaps; a marker of bone resorption). L-arginine supplementation prevented the diabetes-induced reduction of BMD and osteocalcin, and the increase of RatLaps. These pharmacological actions of L-arginine produce a new suggestion that increase of NO synthesis and availability is potentially useful for effective prevention and treatment of osteopenia associated with diabetes.

Study Type : Animal Study

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Depression: 21st Century Solutions + The Dark Side of Wheat

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