Journal of Bone and Mineral Metabolism

, Volume 24, Issue 1, pp 11–15

Randomized trial comparing low-dose hormone replacement therapy and HRT plus 1α-OH-vitamin D3 (alfacalcidol) for treatment of postmenopausal bone loss

  • Hideki Mizunuma
  • Masataka Shiraki
  • Masafumi Shintani
  • Itsuo Gorai
  • Kazuya Makita
  • Shunichi Itoga
  • Yoshiko Mochizuki
  • Hiromichi Mogi
  • Yasuhisa Iwaoki
  • Shouichirou Kosha
  • Toshiyuki Yasui
  • Osamu Ishihara
  • Takumi Kurabayashi
  • Yoshio Kasuga
  • Kunihiko Hayashi
SPECIAL REPORT

Abstract

We conducted a prospective, randomized, multicenter, open-label 2-year trial with 76 postmenopausal women aged ≥60 years with low (T-score less than −1) lumbar bone mineral density (BMD). The hormone replacement therapy (HRT) group received a low dose of conjugated estrogen (CEE) at a dose of 0.31 mg/day ± medroxyprogesterone acetate (MPA) 2.5 mg/day. Group HRT/D received the same dose of HRT together with alfacalcidol in a daily dose of 1.0 µg/day. Changes in lumbar BMD measured by dual energy X-ray absorptiometry (DXA) were followed every 6 months for 2 years. The lumbar BMD of group HRT increased 3.37% [95% confidence interval (CI) 1.6%–5.2%], 4.00% (95%CI 1.6%–6.4%), and 2.32% (95%CI −0.7% to 5.3%) at 12, 18, and 24 months, respectively, when the baseline value was taken as 0%. Lumbar BMD of group HRT/D showed a significant increase beyond 6 months. The percent increases for this group at 6, 12, 18, and 24 months were 6.18 (95%CI 1.3%–6.6%), 6.18% (95%CI 3.9%–8.5%), 7.17% (95%CI 4.3%–10.0%), and 8.75% (95%CI 6.0%–11.5%), respectively. In addition, there was a significant difference in the changes of the lumbar BMD between the two groups at 24 months, suggesting that the combination of HRT and alfacalcidol is more effective than HRT alone in terms of the BMD effect. This study is the first prospective trial demonstrating an additive effect of alfacalcidol on lumbar BMD in postmenopausal women receiving low-dose HRT. It suggests that the combination therapy can be considered to be a promising mode of treatment for bone loss after menopause.

Key words

bone loss low-dose HRT osteoporosis 1α-OH-vitamin D3 

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Copyright information

© Springer-Verlag Tokyo 2006

Authors and Affiliations

  • Hideki Mizunuma
    • 1
  • Masataka Shiraki
    • 2
  • Masafumi Shintani
    • 3
  • Itsuo Gorai
    • 4
  • Kazuya Makita
    • 5
  • Shunichi Itoga
    • 6
  • Yoshiko Mochizuki
    • 7
  • Hiromichi Mogi
    • 8
  • Yasuhisa Iwaoki
    • 9
  • Shouichirou Kosha
    • 10
  • Toshiyuki Yasui
    • 11
  • Osamu Ishihara
    • 12
  • Takumi Kurabayashi
    • 13
  • Yoshio Kasuga
    • 14
  • Kunihiko Hayashi
    • 15
  1. 1.Department of Obstetrics and GynecologyHirosaki University School of MedicineHirosakiJapan
  2. 2.Research Institute and Practice for Involutional DiseasesNaganoJapan
  3. 3.Department of Obstetrics and GynecologyNarakenritsu Mimuro HospitalNaraJapan
  4. 4.Department of Obstetrics and Gynecology, International University of Health and WelfareAtami HospitalAtamiJapan
  5. 5.Department of Obstetrics and Gynecology, School of MedicineKeio UniversityTokyoJapan
  6. 6.Department of Obstetrics and GynecologyTone Central HospitalNumataJapan
  7. 7.Department of Obstetrics and GynecologyDokkyo University School of MedicineTochigiJapan
  8. 8.Department of Obstetrics and GynecologyMaebashi Kyouritu HospitalMaebashiJapan
  9. 9.Department of Obstetrics and GynecologyKouseiren Yoshida General HospitalHiroshimaJapan
  10. 10.Department of Obstetrics and GynecologyKagoshima University School of MedicineKagoshimaJapan
  11. 11.Department of Obstetrics and GynecologyTokushima University School of MedicineTokushimaJapan
  12. 12.Department of Obstetrics and GynecologySaitama Medical SchoolSaitamaJapan
  13. 13.Department of Obstetrics and GynecologyNiigata University School of MedicineNiigataJapan
  14. 14.Department of Obstetrics and GynecologyAshikaga Red Cross HospitalTochigiJapan
  15. 15.Department of Basic Allied Medicine, School of Health Sciences, Faculty of MedicineGunma UniversityMaebashiJapan

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