Abstract
Multiple factors can contribute to the development of osteodystrophy in patients with chronic liver disease (CLD). Recently, two new cytokines, osteoprotegerin (OPG) and the receptor activator of nuclear factor-kB ligand (RANKL), have been implicated in the pathogenesis of post-menopausal osteoporosis and other metabolic bone diseases. Therefore, the aim of our study was to evaluate bone metabolism, bone mineral density (BMD) and OPG/RANKL system in 65 male patients with CLD and in 65 healthy controls. Our patients showed lower BMD values than controls both at lumbar and femoral levels. Moreover, they had an unbalanced bone turnover with an increased resorption phase, as shown by high levels of urinary deoxypyridinoline and a decreased formation phase, as shown by the slightly, but significant, low levels of bone-alkaline phosphatase. Patients showed lower plasma levels of free-testosterone than controls and higher—although not significantly so—plasma levels of 17 β-estradiol. Furthermore, patients with CLD had higher levels of sex hormone-binding globulin and OPG, and lower levels of 25-hydroxyvitamin D (25-HOD)and IGF-I than the control group, while RANKL levels were similar in the two groups. In conclusion, our data do not confirm the hypothesis that the OPG/RANKL system could exert a key role in the pathogenesis of hepatic osteodystrophy, but rather that the observed increase in OPG levels may represent either the result of the inflammatory process per se or a compensation for the observed enhanced bone resorption.
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Gaudio, A., Lasco, A., Morabito, N. et al. Hepatic osteodystrophy: Does the osteoprotegerin/receptor activator of nuclear factor-kB ligand systemplay a role?. J Endocrinol Invest 28, 677–682 (2005). https://doi.org/10.1007/BF03347549
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DOI: https://doi.org/10.1007/BF03347549