Prevention of corticosteroid bone loss

Area of Science:

• Endocrinology
• Bone Metabolism
• Pharmacology

Background:

• Prolonged corticosteroid use is a major risk factor for osteoporotic fractures.
• Corticosteroids induce bone loss by increasing bone resorption and decreasing bone formation.

Purpose of the Study:

• To evaluate the efficacy of prophylactic treatment with 1,25-dihydroxyvitamin D3 (calcitriol) and nasal salmon calcitonin in preventing corticosteroid-induced bone loss.
• To compare the effects of calcium alone, calcium plus calcitriol, and calcium plus calcitriol and nasal salmon calcitonin.

Main Methods:

• A randomized, double-masked, prospective study involving 103 patients on their first-time long-term corticosteroid treatment.
• Patients received calcium supplementation alone, or with calcitriol, or with calcitriol and nasal salmon calcitonin for 12 months.
• Bone mineral density (BMD) was measured every 4 months at the lumbar spine and femoral neck using dual-photon absorptiometry.

Main Results:

• Calcium supplementation alone did not prevent bone loss at either the lumbar spine or femoral neck.
• Calcitriol, with or without nasal salmon calcitonin, significantly reduced bone loss in the lumbar spine (p < 0.0001).
• Neither treatment regimen prevented bone loss at the femoral neck.

Conclusions:

• Calcium and calcitriol, with or without nasal salmon calcitonin, effectively reduce or prevent corticosteroid-induced bone loss in the lumbar spine.
• These findings suggest a potential therapeutic strategy for managing bone loss in patients on long-term corticosteroid therapy.
• Further research may be needed to address bone loss at the femoral neck.