Abstract:
:Concurrent use of bisphosphonate therapy reduces the anabolic effect of teriparatide. Consequently, in clinical practice bisphosphonates are discontinued and teriparatide therapy held for a few months to allow bone turnover to increase. We aimed to evaluate the effect of prior bisphosphonate exposure and the effect of bisphosphonate wash-out on the treatment response to teriparatide. Thirty-nine patients with primary osteoporosis (mean age 63.6 +/- 14.0 years), including 26 patients previously treated with oral bisphosphonates (median duration 53 months) and 13 bisphosphonate-naïve patients were started on teriparatide (20 mug daily) and followed prospectively over 12 months. The primary study outcome was change in bone formation markers (PINP, bone ALP, osteocalcin). Secondary outcomes included changes in bone resorption (betaCTX) and 12-month changes in BMD. Markers of bone formation increased early during teriparatide therapy and were followed by an increase in betaCTX (p < 0.001). The magnitude of the increase in bone markers was comparable in both patient groups irrespective of prior bisphosphonate exposure; similarly, increases in BMD after 12 months were not significantly different between bisphosphonate-pretreated and bisphosphonate-naïve patients (lumbar spine 7.1 vs. 8.9%, p = 0.58; total hip 4.1 vs. 1.1%, p = 0.48). The response of teriparatide was not related to the duration of bisphosphonate wash-out (median duration 4.2 months). This study confirms that beneficial effects of teriparatide on intermediate bone endpoints can be translated into clinical practice with less constringent methodological circumstances than in RCTs. Furthermore, as bisphosphonate wash-out does not appear to influence the treatment effect, teriparatide therapy can be started immediately after ceasing bisphosphonate therapy and wash-out.
journal_name
J Bone Miner Metabjournal_title
Journal of bone and mineral metabolismauthors
Keel C,Kraenzlin ME,Kraenzlin CA,Müller B,Meier Cdoi
10.1007/s00774-009-0101-7subject
Has Abstractpub_date
2010-01-01 00:00:00pages
68-76issue
1eissn
0914-8779issn
1435-5604journal_volume
28pub_type
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