PMID: 11336368May 5, 2001Paper

Pamidronate increases trabecular bone mineral density in immobilization osteopenia in male rats

Annales Chirurgiae Et Gynaecologiae
J HuuskonenE Alhava

Abstract

Osteopenia is a common consequence of immobilization. We investigated the effects of pamidronate on immobilized bone in male rats. Eighty male Wistar rats (5 months old) were divided in five groups (control (C); pamidronate at 0.5 mg/kg per dose (Pam0.5); immobilization (N); pamidronate at 0.05 mg/kg per dose + immobilization (N + Pam0.05); and pamidronate at 0.5 mg/kg per dose + immobilization (N + Pam0.5). The rats were immobilized on their right side by sciatic neurectomy. Pamidronate was given subcutaneously three times a week for three weeks. Trabecular bone mineral density (TBMD) of the upper femur, ultimate failure load of the femoral diaphysis, ash weight of femur, calcium content of femoral ash, and ash weight corrected with bone volume (AWcc [g/cm3]) were determined. Histomorphometry of proximal tibiae was performed by a semiautomatic method. TBMD was higher on both sides in Pam0.5 and N + Pam0.5 groups than in C or N groups. Ultimate failure load was not altered significantly with treatment. AWcc of the immobilized femur was lower (p < 0.001) than in the contralateral limb in N, N + Pam0.05 and N + Pam0.5 groups. Both resorption and formation parameters were suppressed by pamidronate. Pamidronate treatment seemed to ...Continue Reading

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