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Plasma and bone osteocalcin levels in rats with type ii collagen—induced arthritis
Authors:Hiroshi Tanaka  Hiroshi Shirota  Manabu Kuwada  Kuniaki Terato  Kouichi Katayama
Abstract:Osteocalcin levels in plasma and bone were measured by enzyme immunoassay in rats with arthritis induced by immunization with type II collagen and in untreated control rats. Compared with levels in control rats, the plasma levels of osteocalcin in arthritic rats were markedly decreased 1–3 weeks after immunization; during weeks 8–14, these levels were significantly increased. The osteocalcin content of tarsal bones changed in parallel with the plasma levels. These data suggest that osteocalcin levels in the plasma of arthritic rats reflect alterations in bone formation activity.
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