The Beneficial Effect of Boswellic Acid on Bone Metabolism and Possible Mechanisms of Action in Experimental Osteoporosis.

Estrogen is instrumental in the pathological process of osteoporosis because a deficiency of this hormone increases the release of bone-resorbing cytokines. Acetyl-11-keto-ß-boswellic acid (AKBA), a constituent from Boswellia serrata, has an anti-inflammatory effect by inhibiting tumor necrosis factor-α (TNF-α) expression, which leads to a decline in receptor activator of nuclear factor-kappa B (NF-κB) ligand, and consequently, a reduction in osteoclast activity. Hence, AKBA may be beneficial against bone loss during osteoporosis. Therefore, the current study intended to evaluate the beneficial effects of AKBA in ovariectomy-induced osteoporosis and to investigate its mechanism of action. Sham-operation or ovariectomy female Sprague Dawley rats were used for evaluating the antiosteoporotic effect of AKBA in this study. AKBA (35 mg/kg, p.o.) and estradiol (0.05 mg/kg, i.m.) were administered for 42 days. At the end of the experiment, body and uterus weights, serum and urine calcium and phosphorus, serum alkaline phosphatase, and urinary creatinine levels, besides serum levels of NF-κB and TNF-α were determined. Weight, length, thickness, hardness, calcium content, as well as the bone mineral density of femur bone and lumbar vertebra were measured. A histopathological examination was also carried out. AKBA ameliorated all tested parameters and restored a normal histological structure. Thus, AKBA showed good antiosteoporotic activity, which may be mediated through its suppression of the NF-κB-induced TNF-α signaling pathway.

An ayurvedic proprietary herbal preparation, Calci-7, prevents ovariectomy-induced osteoporosis in rats.

INTRODUCTION: CALCI-7 (CA) is an ayurvedic proprietary medicine, used to treat osteoporosis in postmenopausal women. However, scientific proof for its anti-osteoporotic effect and mechanism of action remain unclear due to which present study was under taken. MATERIALS AND METHODS: Ovariectomy was performed to induce osteoporosis. Rats were given CA 100 mg/kg, p.o. and estrogen 0.0563 mg/kg, i.m. once a day from day 1 to day 42. Animals were weighed weekly for body weight variation. At the end of 42 days treatment, urine and the blood samples were collected for analysis of calcium, phosphorus and alkaline phosphatase. Immediately, after sample collection, the uterus was carefully removed and weighed. Results were analysed using ANOVA. RESULTS: CA treatment to ovariectyomized (OVX) rats showed significant improvement in body weight, increased levels of calcium and phosphorus levels in serum while levels were found to be decreased in urine as compared to OVX group. The significant increase in uterine weight and femur length were observed in treatment groups. In the histopathological examination bone structure showed a normal structure with lacuna and various lamellae without any damage or porosity in bone in the formulation and estrogen-treated group. CONCLUSION: The present findings are strongly suggestive that CA possesses comparable efficacy to estrogen and thus can be useful in the postmenopausal osteoporosis.