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- Title
Reference intervals of serum tartrate-resistant acid phosphatase type 5b activity measured with a novel assay in Japanese subjects.
- Authors
Yoshiki Nishizawa; Masaaki Inaba; Mitsukazu Ishii; Hiroyuki Yamashita; Takami Miki; Hitoshi Goto; Sinsuke Yamada; Osamu Chaki; Kentaro Kurasawa; Yoshiko Mochizuki
- Abstract
Abstract Among the isotypes of serum tartrate-resistant acid phosphatase (TRACP), only type 5b (TRACP-5b) is derived from osteoclasts, and it is necessary to develop an assay specific for this TRACP-5b for evaluation of osteoclastic activity. Recently, a novel assay system for TRACP-5b called the fragments absorbed immunocapture enzymatic assay (FAICEA) has been developed. With two unique monoclonal antibodies, one that is highly specific for TRACP-5b and another which absorbs inactive TRACP-5b fragments that interfere with measuring active TRACP-5b, this assay provides correct measurement of TRACP-5b activity in the serum without interference by the inactive fragments of TRACP-5b and other isotypes of TRACP, especially TRACP-5a. To study the reference data of Japanese subjects, we measured TRACP-5b activity in the serum of 320 men (age, 20–82 years) and 466 women [315 premenopausal (age, 18–55 years) and 151 postmenopausal (age, 45–77 years)] with this novel assay. In men, serum TRACP-5b activity did not vary significantly with age. The postmenopausal women had significantly higher serum TRACP-5b activity than the premenopausal women. The reference intervals (logarithmic mean ±1.96 SD) for men, premenopausal women, and postmenopausal women were 1.7–5.9 U/l, 1.2–4.4 U/l, and 2.5–7.6 U/l, respectively.
- Subjects
BLOOD plasma; PHOSPHATASES; MONOCLONAL antibodies; OSTEOCLASIS
- Publication
Journal of Bone & Mineral Metabolism, 2008, Vol 26, Issue 3, p265
- ISSN
0914-8779
- Publication type
Article
- DOI
10.1007/s00774-007-0826-0