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Revista de Osteoporosis y Metabolismo Mineral
versão On-line ISSN 2173-2345versão impressa ISSN 1889-836X
Resumo
TORRUBIA, B et al. Effects of bazedoxifene treatment on the bone quality of ovariectomized rats. Rev Osteoporos Metab Miner [online]. 2020, vol.12, n.1, pp.20-27. Epub 15-Jun-2020. ISSN 2173-2345. https://dx.doi.org/10.4321/s1889-836x2020000100004.
Objetive:
Bazedoxifene is a 3rd generation SERM with agonistic effects on the bones, uterus and breast tissue. Our goal has been to study the effects of bazedoxifene on bone quality of an experimental group of ovariectomized rats.
Material and methods:
3 groups of 15 6-month-old Wistar female rats were used: a control group, a group of untreated ovariectomized rats and a group of ovariectomized rats treated with bazedoxifene (0.33 mg/kg/day). After 8 months we studied the lumbar and femur bone densitometry, the microtomographic parameters, the biochemical markers for bone remodelling and the bone biomechanical parameters.
Results:
The ovariectomy depleted the femur and lumbar bone density. After receiving bazedoxifene, the lumbar bone density showed partial healing. Bone remodelling increased recovering bazedoxifene formation levels. Bazedoxifene promoted the recovery of the bone volume fraction (BV/TV), the bone surface density (BS/BV), the trabecular number (Tb.N), the trabecular spacing (Tb.Sp), the trabecular pattern factor (Tb.Pf) and the structural model index (SMI). The cortical surface increased after the ovariectomy and returned to normal levels with the administration of bazedoxifene. The maximum deformation showed before the ovariectomy was also restored, partially cushioning the ovariectomized rats’ weight gain.
Conclusions:
Our study has shown bazedoxifene positive results on bone quality. This specific drug could be particularly suitable for young postmenopausal women suffering or at risk of suffering osteoporosis.
Palavras-chave : Bazedoxifene; bone mineral density; bone remodelling; microtomography; biomechanics; endometrial safety.