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  • Title: Osteocalcin and bone alkaline phosphatase in the serum of women with liver disease.
    Author: Steinberg KK, Bonkovsky HL, Caudill SP, Bernhardt RK, Hawkins M.
    Journal: Ann Clin Lab Sci; 1991; 21(5):305-14. PubMed ID: 1952779.
    Abstract:
    To identify the types of liver disease in which osteopenia is a prominent feature and to understand the mechanisms of bone loss, bone mineral density was measured in the lumbar spine and hip, bone alkaline phosphatase, osteocalcin, and biochemical markers of calcium homeostasis were measured in 42 women, aged 33 to 52, with chronic liver disease and in 299 healthy women of similar age. In control women, bone alkaline phosphatase and osteocalcin correlated negatively with bone density at all sites (p less than 0.05). In women with liver disease, osteocalcin correlated negatively with bone density in the lumbar spine (p less than 0.007), whereas bone alkaline phosphatase did not correlate with bone density at any site. Bone alkaline phosphatase correlated positively with osteocalcin in control women (p = 0.001) and negatively with osteocalcin in women with liver disease (p = 0.03). Serum bone alkaline phosphatase in women with liver disease was increased significantly over serum bone alkaline phosphatase of control women, probably because of decreased clearance owing to defective function or decreased numbers of hepatic asialoglycoprotein receptors. Bone density was lower in the lumbar spines and hips of women with primary sclerosing cholangitis, primary biliary cirrhosis, and chronic active hepatitis or fibrosis without cirrhosis than in the lumbar spine and hips of control women. However, the differences were not significant, possibly because of the small sample size. It is concluded that, in liver disease, osteocalcin is a more reliable marker of osteoblastic function than bone alkaline phosphatase. Although our results show that bone density may decrease in women with cholestatic liver disease, larger studies are needed to determine the degree of osteopenia.
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