Altered bone mineral metabolism in patients with osteoarthritis.
OBJECTIVE
Investigation of the relationship between osteoarthritis (OA) and mineral density, and determination of any alteration in bone mineral, metabolism as assessed by biochemical markers of bone resorption and formation.


METHODS
Forty females and 20 males were included in the study. Spinal OA as well as knee OA were defined from radiographs and graded according to Lane et al.'s and Spector et al.'s scoring systems. Bone mineral density (BMD) of the lumbar spine was measured by osteo CT. Bone turnover rates were estimated by measuring biochemical markers of bone resorption (urinary deoxypyridinoline) and bone formation (bone-specific alkaline phosphatase). Forty females and 20 males of the same age were studied as a control group.


RESULTS
BMD was greater in women with spinal OA as compared to controls (P < 0.05). Also, males with OA had a non-significantly higher BMD than controls. The bone resorption markers were higher than normal values. However, they were lower than the control group. Similarly, the bone formation markers were lower as compared to the control group.


CONCLUSIONS
Spinal OA is associated with higher BMD. This protective effect of spinal OA against osteoporosis may be mediated through decreased rate of bone turnover.
El Miedany
Y M
YM
Rheumatology and Rehabilitation Department, Ain Shams University Faculty of Medicine, Cairo, Egypt. miedanycrd@usa.net
Mehanna
A N
AN
El Baddini
M A
MA
D015415:Biomarkers / Q000032:analysis; D015519:Bone Density / Q000502:physiology*; D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000378:metabolism / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000378:metabolism* / Q000503:physiopathology; D011859:Radiography; D012737:Sex Factors
D015415:Biomarkers