New Biochemical Serum Markers of Boneturnover in Renal Osteodystrophy.

Renal osteodystrophy is a multifactorial disorder of bone remodelling that develops in patients with chronic renal failure. During the last few years numerous biochemical markers of bone turnover have been proposed for the non-invasive diagnosis of renal osteodystrophy. Several enzymes and matrix proteins produced by osteoblasts and osteoclasts, including collagen type I degradation products, have been recognized as circulating biochemical markers of both bone formation and bone resorption process. The aim of this article was to present and estimate the clinical utility of new serum markers of bone metabolism like bone specific alkaline phosphatase (bAP), procollagen type I extension peptides (PICP/PINP), osteocalcin (Oc), tartrate-resistant acid phosphatase (TRAP), procollagen type I crosslinked carboxyterminal telopeptide (ICTP), pyridinoline (PYR), deoxypyridinoline (DPD), C- or N-terminal telopeptides of type I collagen (CTx, NTx) and other potential markers in diagnosis of renal osteodystrophy in patients with chronic renal failure.