Low serum osteoprotegerin levels in normoalbuminuric type 1 diabetes mellitus
Singh, D.K.; Winocour, P.; Summerhayes, B.; Viljoen, A.; Sivakumar, G.; Farrington, Ken
Citation: Singh , D K , Winocour , P , Summerhayes , B , Viljoen , A , Sivakumar , G & Farrington , K 2010 , ' Low serum osteoprotegerin levels in normoalbuminuric type 1 diabetes mellitus ' Acta Diabetologica , vol 47 , no. Supp 1 , pp. 105-110 . DOI: 10.1007/s00592-009-0146-z
The aim of this study is to establish whether abnormal mineral metabolism is present in patients with type 1 DM with normal renal function and in the absence of microalbuminuria. Serum levels of 1,25-dihydroxyvitamin D, osteoprotegerin (OPG) and receptor activator for nuclear factor kappa β ligand (RANKL) and other determinants of bone metabolism were measured in 35 patients with type 1 DM and in 25 age-, sex- and ethnicity-matched healthy controls. Serum OPG (1.98 vs. 2.98 pmol/l: P = 0.001), 1,25-dihydroxyvitamin D (41.1 vs. 48.2 pmol/l: P = 0.035) and magnesium (0.84 vs. 0.89 mmol/l P = 0.029) levels were significantly lower in patients with type 1 DM compared to normal controls. RANKL levels were similar in both groups. The groups did not differ with respect to calcium, phosphate, PTH, 25-hydroxyvitamin D, tubular reabsorption of phosphate and cross-linked N-telopeptides of type 1-collagen levels. Abnormalities of mineral metabolism including low serum OPG and 1,25-dihydroxyvitamin D levels occur in patients with type 1 DM with normal renal function and in the absence of microalbuminuria. These abnormalities may promote altered bone metabolism and vascular pathology.
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