Vol.23 No.3

Original Article

Clinical results of alendronate monotherapy and combined therapy with menatetrenone (VitK2) in postmenopausal RA patients

Authors

Kouji Suzuki1 , Shigeyoshi Tsuji1 , Yaeko Fukushima2 , Takanobu Nakase1 , Masayuki Hamada1 , Tetsuya Tomita3 , Hideki Yoshikawa3

  • Department of Orthopaedic Surgery, Hoshigaoka Koseinenkin Hospital, 4-8-1 Hoshigaoka, Hirakata Osaka, 573-8511, Japan
  • Osaka Trauma and Microsurgery Center, Seikeikai Hospital, Sakai, Osaka, Japan
  • Department of Orthopaedics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
Received:

29 February 2012

Accepted:

16 May 2012

Published online:

13 June 2012

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Abstract

Objectives
We aimed to evaluate the clinical efficacy of monotherapy with alendronate and combined therapy with alendronate and menatetrenone (vitamin K2 [VitK2]) in postmenopausal rheumatoid arthritis (RA) patients with osteoporosis or osteopenia.
Methods Sixty-two postmenopausal RA patients with untreated osteoporosis or osteopenia (lumbar spine bone density B80 % of young adult mean [YAM]) were enrolled: 39 had abnormal serum undercarboxylated osteocalcin (ucOC) levels ([4.5 ng/mL) and received combined therapy with alendronate (35 mg/week) and VitK2 (45 mg/day) (ALN ? K group); 23 had normal ucOC levels (B4.5 ng/mL) and received alendronate monotherapy (35 mg/week) (ALN group). The clinical results for the 57 patients in both groups were evaluated after 1-year treatment.
Results
The mean baseline/follow-up (FU) lumbar spine bone density (%YAM) values were 73.0/76.8 % (P%ABST%.01) in the ALN ? K group and 77.0/80.3 % (P%ABST%.01) in the ALN group; a significant increase was shown in both groups. Mean proximal femoral bone density values at baseline/FU were 71.4/73.8 (P%ABST%.01) in the ALN ? K group and 71.4/71.6 % (not significant; NS) in the ALN group; a significant increase was shown in the ALN ? K group only. Serum ucOC levels were normalized in the ALN ? K group at FU. At FU, bone metabolism markers [bone-specific alkaline phosphatase (BAP) and N-terminal cross-linked telopeptides of type I collagen] were decreased in both groups. One patient in the ALN ? K group and three in the ALN group suffered new fractures.
Conclusions
Combined therapy with alendronate and VitK2 decreases bone metabolism marker levels and serum ucOC levels, and increases lumbar spine and femoral neck bone density in postmenopausal RA patients with abnormal ucOC levels and osteoporosis or osteopenia.

Key words

Undercarboxylated osteocalcin (ucOC), Rheumatoid arthritis (RA), Menatetrenone (VitK2), Alendronate (ALN), Osteoporosis