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Differential effects of teriparatide and alendronate on bone remodeling in postmenopausal women assessed by histomorphometric parameters.
J Bone Miner Res 2005; 20(7):1244-53JB

Abstract

An 18-month randomized double-blind study was conducted in postmenopausal women with osteoporosis to compare the effects of once-daily teriparatide 20 microg with alendronate 10 mg on bone histomorphometry. Biopsies were obtained from 42 patients. Indices of bone formation were significantly higher after 6 or 18 months of teriparatide compared with alendronate treatment.

INTRODUCTION

Alendronate and teriparatide increased BMD, assessed by DXA, by different mechanisms of action, supported by changes in biochemical markers of bone turnover. The purpose of this cross-sectional study was to explore the differential effects of these two osteoporosis treatments at the bone tissue level by examining bone histomorphometric parameters of bone turnover after either 6 or 18 months of treatment.

MATERIALS AND METHODS

Patients were a cohort from a randomized parallel double-blind study conducted to compare the effects of once-daily teriparatide 20 microg and alendronate 10 mg in postmenopausal women with osteoporosis. Transiliac crest bone biopsies were obtained after tetracycline double labeling from 42 patients treated for 6 months (n = 23) or 18 months (n = 14); 5 additional patients were biopsied from contralateral sides at 6 and 18 months. Biopsy specimens adequate for quantitative analysis were analyzed by 2D histomorphometry from 17 patients at 6 months (teriparatide, n = 8; alendronate, n = 9) and 15 patients at 18 months (teriparatide, n = 8; alendronate, n = 7). Data were analyzed by two-sample tests.

RESULTS

Histomorphometric indices of bone formation were significantly and markedly greater in the teriparatide group than in the alendronate group at 6 and 18 months, whereas indices of bone resorption were only significantly greater in the teriparatide group than in the alendronate group at 6 months. Bone formation and activation frequency were significantly lower at 18 months compared with 6 months in the teriparatide group, returning to levels comparable with untreated postmenopausal women. In the teriparatide group, the peak in histomorphometric bone formation indices coincided with peak levels for N-terminal propeptide of type I collagen, a biochemical marker of bone formation. The degree of mineralization was lower at 18 months than at 6 months with treatment in both groups but was not different between groups.

CONCLUSIONS

These results confirm the opposite mechanisms of action of teriparatide and alendronate on bone remodeling and confirm the bone formation effect of teriparatide.

Authors+Show Affiliations

Laboratoire d'Histodynamique Osseuse and INSERM Unit 403, Faculty of Medicine R. Laennec, Lyon, France. Monique.Arlot@sante.univ-lyon1.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15940379

Citation

Arlot, Monique, et al. "Differential Effects of Teriparatide and Alendronate On Bone Remodeling in Postmenopausal Women Assessed By Histomorphometric Parameters." Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, vol. 20, no. 7, 2005, pp. 1244-53.
Arlot M, Meunier PJ, Boivin G, et al. Differential effects of teriparatide and alendronate on bone remodeling in postmenopausal women assessed by histomorphometric parameters. J Bone Miner Res. 2005;20(7):1244-53.
Arlot, M., Meunier, P. J., Boivin, G., Haddock, L., Tamayo, J., Correa-Rotter, R., ... Eriksen, E. F. (2005). Differential effects of teriparatide and alendronate on bone remodeling in postmenopausal women assessed by histomorphometric parameters. Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, 20(7), pp. 1244-53.
Arlot M, et al. Differential Effects of Teriparatide and Alendronate On Bone Remodeling in Postmenopausal Women Assessed By Histomorphometric Parameters. J Bone Miner Res. 2005;20(7):1244-53. PubMed PMID: 15940379.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential effects of teriparatide and alendronate on bone remodeling in postmenopausal women assessed by histomorphometric parameters. AU - Arlot,Monique, AU - Meunier,Pierre J, AU - Boivin,Georges, AU - Haddock,Lillian, AU - Tamayo,Juan, AU - Correa-Rotter,Ricardo, AU - Jasqui,Salomón, AU - Donley,David W, AU - Dalsky,Gail P, AU - Martin,Javier San, AU - Eriksen,Erik Fink, Y1 - 2005/03/14/ PY - 2004/07/16/received PY - 2005/01/21/revised PY - 2005/03/10/accepted PY - 2005/6/9/pubmed PY - 2005/9/21/medline PY - 2005/6/9/entrez SP - 1244 EP - 53 JF - Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research JO - J. Bone Miner. Res. VL - 20 IS - 7 N2 - UNLABELLED: An 18-month randomized double-blind study was conducted in postmenopausal women with osteoporosis to compare the effects of once-daily teriparatide 20 microg with alendronate 10 mg on bone histomorphometry. Biopsies were obtained from 42 patients. Indices of bone formation were significantly higher after 6 or 18 months of teriparatide compared with alendronate treatment. INTRODUCTION: Alendronate and teriparatide increased BMD, assessed by DXA, by different mechanisms of action, supported by changes in biochemical markers of bone turnover. The purpose of this cross-sectional study was to explore the differential effects of these two osteoporosis treatments at the bone tissue level by examining bone histomorphometric parameters of bone turnover after either 6 or 18 months of treatment. MATERIALS AND METHODS: Patients were a cohort from a randomized parallel double-blind study conducted to compare the effects of once-daily teriparatide 20 microg and alendronate 10 mg in postmenopausal women with osteoporosis. Transiliac crest bone biopsies were obtained after tetracycline double labeling from 42 patients treated for 6 months (n = 23) or 18 months (n = 14); 5 additional patients were biopsied from contralateral sides at 6 and 18 months. Biopsy specimens adequate for quantitative analysis were analyzed by 2D histomorphometry from 17 patients at 6 months (teriparatide, n = 8; alendronate, n = 9) and 15 patients at 18 months (teriparatide, n = 8; alendronate, n = 7). Data were analyzed by two-sample tests. RESULTS: Histomorphometric indices of bone formation were significantly and markedly greater in the teriparatide group than in the alendronate group at 6 and 18 months, whereas indices of bone resorption were only significantly greater in the teriparatide group than in the alendronate group at 6 months. Bone formation and activation frequency were significantly lower at 18 months compared with 6 months in the teriparatide group, returning to levels comparable with untreated postmenopausal women. In the teriparatide group, the peak in histomorphometric bone formation indices coincided with peak levels for N-terminal propeptide of type I collagen, a biochemical marker of bone formation. The degree of mineralization was lower at 18 months than at 6 months with treatment in both groups but was not different between groups. CONCLUSIONS: These results confirm the opposite mechanisms of action of teriparatide and alendronate on bone remodeling and confirm the bone formation effect of teriparatide. SN - 0884-0431 UR - https://www.unboundmedicine.com/medline/citation/15940379/Differential_effects_of_teriparatide_and_alendronate_on_bone_remodeling_in_postmenopausal_women_assessed_by_histomorphometric_parameters_ L2 - https://doi.org/10.1359/JBMR.050309 DB - PRIME DP - Unbound Medicine ER -