Development of a novel fragments absorbed immunocapture enzyme assay system for tartrate-resistant acid phosphatase 5b

Tatsuya Ohashi, Yoshihiko Igarashi, Yoshiko Mochizuki, Toshihide Miura, Noriyuki Inaba, Katsuhiro Katayama, Takeshi Tomonaga, Fumio Nomura

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Background: Osteoclastic activity is mainly assessed by measuring urinary markers. To correct for differences in renal clearance, the levels of urinary markers are usually corrected by the urine creatinine concentration. Therefore, alternative serum markers to evaluate osteoclastic activity are required. We developed a novel system for the determination of serum tartrate-resistant acid phosphatase 5b (TRACP5b) activity to evaluate osteoclastic activity. Methods: Two unique monoclonal antibodies were generated and the specificity was tested using a surface enhanced laser desorption/ionization time-of-flight mass spectroscopy (SELDI TOF-MS). A novel fragments absorbed immunocapture enzymatic assay (FAICEA) method was developed using 2 monoclonal antibodies. Results: FAICEA gave a sensitivity 0.1 U/l, linearity of 0.1-28 U/l, recovery 92-103%, inter-assay CV 2.95% and intra-assay CV 2.15%. Unlike other TRACP5b assay systems, FAICEA avoided interference from TRACP 5a. Conclusions: According to the FAICEA, postmenopausal women had higher TRACP5b concentrations than younger women. The results show that TRACP5b is a novel bone resorption marker in serum.

Original languageEnglish
Pages (from-to)205-212
Number of pages8
JournalClinica Chimica Acta
Volume376
Issue number1-2
DOIs
Publication statusPublished - 2007 Feb 1
Externally publishedYes

Keywords

  • FAICEA
  • Fragments absorbed immunocapture enzymatic assay
  • SELDI TOF-MS
  • Surface enhanced laser desorption/ionization time-of-flight mass spectroscopy
  • TRACP
  • Tartrate-resistant acid phosphatase

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Biochemistry, medical

Fingerprint Dive into the research topics of 'Development of a novel fragments absorbed immunocapture enzyme assay system for tartrate-resistant acid phosphatase 5b'. Together they form a unique fingerprint.

Cite this