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Teriparatide treatment exerts differential effects on the central and peripheral skeleton: results from the MOAT study

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Abstract

Summary

The central and peripheral skeleton was characterised using imaging techniques during 104 weeks of teriparatide treatment. Teriparatide exerts differential effects on the central and the peripheral skeleton. Overall, we did not observe a change in total body bone mineral. Our conclusions are constrained by the study limitations.

Introduction

Teriparatide stimulates bone formation and resorption and therefore can cause bone gain and loss. We simultaneously characterised the central and peripheral skeleton using imaging techniques to better understand the mechanism of action of teriparatide.

Methods

Postmenopausal, osteoporotic women (n = 20, 65.4 ± 5.5 years) were recruited into a 104-week study of teriparatide. Imaging techniques included DXA, quantitative computed tomography (QCT), and high-resolution peripheral quantitative computed tomography (HR-pQCT).

Results

Total lumbar spine areal bone mineral content (aBMC) (+ 11.2%), total lumbar spine areal bone mineral density (aBMD) (+ 8.1%), subregional thoracic spine aBMD (+ 7.5%), lumbar spine aBMC (+ 23.5%), lumbar spine aBMD (+ 11.9%), pelvis aBMC (+ 9.3%), and pelvis aBMD (+ 4.3%) increased. However, skull aBMC (− 5.0%), arms aBMC (− 5.1%), legs aBMC (− 2.9%), and legs aBMD (− 2.5%) decreased. Overall, we did not observe a change in total body bone mineral.

Increases in L1–L3 volumetric BMD (vBMD) (+ 28.5%) occurred but there was no change in total proximal femur vBMD.

Radius and tibia cortical vBMD (− 3.3 and − 3.4%) and tissue mineral density (− 3.2 and − 3.8%) decreased and there was an increase in porosity (+ 21.2 and + 10.3%). Tibia, but not radius, trabecular inhomogeneity (+ 3.2%), and failure load (+ 0.2%) increased, but cortical thickness (− 3.1%), area (− 2.9%), and pore volume (− 1.6%) decreased.

Conclusions

Teriparatide exerts differential effects on the central and the peripheral skeleton. Central trabecular vBMD (L1–L3) is improved, but there is a concomitant decrease in peripheral cortical vBMD and an increase in porosity. Overall, we did not observe a change in total body bone mineral. We acknowledge that our conclusions may be speculative and are constrained by the technical limitations of the imaging techniques used, the lack of a control group, and the small sample size studied.

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Funding

This work was funded by the National Institute for Health Research (NIHR) via its Biomedical Research Units Funding Scheme and the NIHR Sheffield Clinical Research Facility. The views expressed in this publication are those of the author(s) and not necessarily those of the National Health Service (NHS), the NIHR, or the Department of Health (DoH). Teriparatide was provided by Eli Lilly and Company, Basingstoke, UK to Professor R Eastell (PI) through an Investigator-Initiated Trial (IIT). We acknowledge the Clinical Trials Research Unit, School of Health and Related Research (ScHARR), the University of Sheffield for study data management and statistical advice.

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Correspondence to M. A. Paggiosi.

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Conflicts of interest

MAP, LY, and DB state no disclosure. JSW has received speaker’s honoraria from Lilly, grant funding from Alexion and Immunodiagnostic Systems, donation of drug from Prostrakan for a clinical trial, consulting fees from Shire and Mereo Biopharma. NP has received speaker’s honoraria and participated in advisory board activities for Eli Lilly and Prostraken. EVM has received consultancy payments from Merck, UCB, Consilient, speaker fees from Bayer, Consilient, GSK, Amgen, UCB, Roche, Servier, Lilly, and payment for development from Lilly. RE has received consultancy payments, speaker fees, and grant funding from Eli Lilly and Company. Teriparatide was provided by Eli Lilly and Company, Basingstoke, UK to the University of Sheffield through an Investigator-Initiated Trial (IIT) award. The views expressed in this publication are those of the author(s) and not necessarily those of the National Health Service (NHS), the NIHR or the Department of Health (DoH).

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Paggiosi, M.A., Yang, L., Blackwell, D. et al. Teriparatide treatment exerts differential effects on the central and peripheral skeleton: results from the MOAT study. Osteoporos Int 29, 1367–1378 (2018). https://doi.org/10.1007/s00198-018-4445-5

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  • DOI: https://doi.org/10.1007/s00198-018-4445-5

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