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Circulating and tissue-derived isoforms of bone alkaline phosphatase in Pagets disease of bone
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk kemi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk kemi.
Robert Jones and Agnes Hunt Orthopaed and Dist Hospital N.
Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk kemi.
2010 (engelsk)Inngår i: SCANDINAVIAN JOURNAL OF CLINICAL and LABORATORY INVESTIGATION, ISSN 0036-5513, Vol. 70, nr 2, s. 128-135Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background. Alkaline phosphatase (ALP) is routinely used in the assessment of Pagets disease of bone (PDB); however, the individual bone ALP isoforms (B/I, B1, and B2) have not been investigated in this disorder. Methods. Subjects comprised 37 patients (mean age 74 years) with symptomatic PDB confirmed by radiograph and stratified into high and low total ALP activity groups and 66 healthy individuals (mean age 64 years). Extracts of human cancellous and cortical bone tissues were also investigated. The bone ALP isoforms, measured by HPLC, were compared with two bone ALP immunoassays (Metra (R) and Ostase (R)), and the bone formation marker intact amino-terminal procollagen type I propeptide (iPINP). Results. All bone ALP isoforms were increased in high ALP activity PDB compared with the low ALP activity and control groups (p andlt; 0.0001). The B2 isoform had the greater relative activity representing 36%, 50%, and 71%, of the total ALP activity in the control, low and high ALP activity groups, respectively. Compared with controls, B2 was increased in the low ALP activity PDB group (p andlt; 0.05). ROC analysis showed a validity of approximately 80% for B2 to discriminate patients with PDB. Conclusion. All bone ALP isoforms were increased in patients with high ALP activity PDB and the B2 isoform was even elevated in the low ALP activity PDB group. The bone ALP isoform B2 may be of use in the management of PDB but that has to be further elucidated in subsequent studies.

sted, utgiver, år, opplag, sider
2010. Vol. 70, nr 2, s. 128-135
Emneord [en]
Alkaline phosphatase, bone formation, bone markers, bone turnover, collagen, Pagets disease
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-54698DOI: 10.3109/00365511003642527ISI: 000275740900012OAI: oai:DiVA.org:liu-54698DiVA, id: diva2:308431
Tilgjengelig fra: 2010-04-06 Laget: 2010-04-06 Sist oppdatert: 2010-04-06

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