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Osteoporosis International

, Volume 26, Issue 2, pp 765–774 | Cite as

Three-year denosumab treatment in postmenopausal Japanese women and men with osteoporosis: results from a 1-year open-label extension of the Denosumab Fracture Intervention Randomized Placebo Controlled Trial (DIRECT)

  • T. Sugimoto
  • T. Matsumoto
  • T. Hosoi
  • T. Miki
  • I. Gorai
  • H. Yoshikawa
  • Y. Tanaka
  • S. Tanaka
  • M. Fukunaga
  • T. Sone
  • T. Nakano
  • M. Ito
  • S. Matsui
  • T. Yoneda
  • H. Takami
  • K. Watanabe
  • T. Osakabe
  • N. Okubo
  • M. Shiraki
  • T. Nakamura
Original Article

Abstract

Summary

A 12-month extension phase of DIRECT in Japanese subjects with osteoporosis showed that total 3 years of denosumab treatment in Japanese postmenopausal women and men with osteoporosis was associated with low fracture rates, persistent bone turnover marker (BTM) reductions, continuous bone mineral density (BMD) increases, and a favorable overall benefit/risk profile.

Introduction

The DIRECT trial demonstrated that 2 years of treatment with denosumab 60 mg subcutaneously every 6 months significantly reduced the incidence of vertebral fracture compared to placebo in Japanese postmenopausal women and men with osteoporosis. The purpose of this study is to evaluate the efficacy and safety of denosumab treatment for up to 3 years.

Methods

This study includes a 2-year randomized, double-blind, placebo-controlled phase and a 1-year open-label extension phase in which all subjects received denosumab. The data correspond to 3 years of denosumab treatment in subjects who received denosumab (long-term group) and 1 year of denosumab treatment in subjects who received placebo (cross-over group) in the double-blind phase.

Results

Eight hundred and ten subjects who completed the double-blind phase enrolled into the extension phase, and 775 subjects completed the study. All subjects received denosumab with daily supplements of calcium and vitamin D. The cumulative 36-month incidences of new or worsening vertebral fractures and new vertebral fractures were 3.8 and 2.5 %, respectively, in the long-term group. In this group, the BMD continued to increase, and the reduction in BTMs was maintained. In the cross-over group, comparable BMD increases and BTMs reductions to those of in their first year of the long-term group were confirmed. Adverse events did not show a notable increase with long-term denosumab administration. One event of osteonecrosis of the jaw occurred in the cross-over group.

Conclusions

Three-year denosumab treatment in Japanese subjects with osteoporosis showed a favorable benefit/risk profile.

Keywords

Bone mineral density Bone turnover marker Denosumab Fracture Japanese Long-term Osteoporosis 

Notes

Acknowledgments

The study was sponsored by Daiichi-Sankyo., Tokyo, Japan. The authors acknowledge Amgen for editorial assistance on the manuscript.

Conflicts of interest

T. Sugimoto has received consulting fees from Asahi-Kasei Pharma, and Daiichi-Sankyo. He has received research grants from Eli Lilly Japan, Eisai, MSD, Taisho Toyama Pharmaceutical, Chugai Pharmaceutical, Daiichi-Sankyo, and Pfizer. T. Matsumoto has received consulting fees from Daiichi-Sankyo, Ono Pharmaceutical., Asahi-Kasei Pharma., Chugai Pharmaceutical, Astellas Pharma, and Teijin Pharma. T. Hosoi, T. Miki, and I. Gorai have received consulting fees from Daiichi-Sankyo. H. Yoshikawa has received consulting fees from Ono Pharmaceutical, Asahi-Kasei Pharma, and Eisai. He has also received speaker’s bureau from Asahi-Kasei Pharma, Ono Pharmaceutical, Astellas Pharma, and Eli Lilly Japan. Y. Tanaka has received consulting fees from Mitsubishi-Tanabe Pharma, Otsuka Pharma, Pfizer, Eli Lilly Japan, Astellas Pharma, Janssen Pharma, Astra-Zeneca, Mitsubishi-Tanabe Pharma, Abbott Japan, MSD, Daiichi-Sankyo, GlaxoSmithKline, Actelion Pharma Japan, Chugai Pharmaceutical, Eisai, and Santen Pharma. He has also received research grants from Eisai, Pfizer, Janssen Pharma, Astellas Pharma, Bristol-Myers Squibb, Abbott Japan, and Chugai Pharmaceutical. S. Tanaka has received speaker's bureau from Eli Lilly Japan, Janssen Pharmaceutical, Eisai, Santen Pharmaceutical, Teijin Pharma, Nippon Zoki, Johnson & Johnson, Chugai Pharmaceutical, Daiichi-Sankyo, Ono Pharmaceutical, GSK, Pfizer, Mitsubishi Tanabe Pharma, Hisamitsu Pharmaceutical, Asahi Kasei Pharma, Taisho Toyama Pharmaceutical, Astellas Pharma, and Otsuka Pharmaceutical. He has also received consulting fees from Eisai, Astellas Pharma, Bristol-Myers Squibb, Pfizer, Takeda Pharmaceutical, Asashi Kasei Pharma, Ono Pharmaceutical, Dainippon Sumitomo Pharma and Kaken Pharmaceutical, and research grants from Sanofi Aventis, Daiichi-Sankyo, and MSD. T. Nakano has received consulting fees from Asahi-Kasei Pharma, Teijin Pharma, Daiichi-Sankyo, and Chugai Pharmaceutical. M. Ito has received consulting fees from Asahi-Kasei Pharma, Daiichi-Sankyo, and Chugai Pharmaceutical. M. Fukunaga has received consulting fees from Asahi-Kasei Pharma and Astellas Pharma. T. Sone has received research grants from Daiichi-Sankyo Astellas Pharma, Takeda Pharmaceutical, Taisho Toyama Pharmaceutical, and Pfizer and speaker’s bureau from Daiichi-Sankyo, Chugai Pharmaceutical, MSD, Taisho Toyama Pharmaceutical, Pfizer, and Eli Lilly Japan. T. Yoneda has received consulting fees from Daiichi-Sankyo. S. Matsui has received consulting fees from Chugai Pharmaceutical, Daiichi-Sankyo, Eisai, and Takada Pharmaceutical. H. Takami, K Watanabe, T. Osakabe, and N. Okubo are Daiichi-Sankyo employees and own Daiichi-Sankyo stock. M Shiraki has received consulting fees from Daiichi-Sankyo, Chugai Pharmaceutical, Teijin Pharma, Asahi-Kasei Pharma and MSD. T. Nakamura has received consulting fees from Teijin Pharma, Daiichi-Sankyo, Chugai Pharmaceutical, Asahi-Kasei Pharma, and Amgen.

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2014

Authors and Affiliations

  • T. Sugimoto
    • 1
  • T. Matsumoto
    • 2
  • T. Hosoi
    • 3
  • T. Miki
    • 4
  • I. Gorai
    • 5
  • H. Yoshikawa
    • 6
  • Y. Tanaka
    • 7
  • S. Tanaka
    • 8
  • M. Fukunaga
    • 9
  • T. Sone
    • 9
  • T. Nakano
    • 10
  • M. Ito
    • 11
  • S. Matsui
    • 12
  • T. Yoneda
    • 13
  • H. Takami
    • 14
  • K. Watanabe
    • 14
  • T. Osakabe
    • 14
  • N. Okubo
    • 14
  • M. Shiraki
    • 15
  • T. Nakamura
    • 16
  1. 1.Shimane University Faculty of MedicineIzumoJapan
  2. 2.University of Tokushima Graduate School of Medical SciencesTokushimaJapan
  3. 3.Kenkoin ClinicTokyoJapan
  4. 4.Osaka City University Medical SchoolOsakaJapan
  5. 5.Hori HospitalYokohamaJapan
  6. 6.Osaka University Graduate School of MedicineOsakaJapan
  7. 7.University of Occupational & Environmental HealthKitakyushuJapan
  8. 8.The University of TokyoTokyoJapan
  9. 9.Kawasaki Medical SchoolKurashikiJapan
  10. 10.Tamana Central HospitalTamanaJapan
  11. 11.Nagasaki University HospitalNagasakiJapan
  12. 12.Nagoya University Graduate School of MedicineNagoyaJapan
  13. 13.Osaka University Graduate School of DentistryOsakaJapan
  14. 14.Daiichi Sankyo Co. Ltd.TokyoJapan
  15. 15.Research Institute and Practice for Involutional DiseasesNaganoJapan
  16. 16.National Center for Global Health and MedicineTokyoJapan

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