Abstract Title:

Grapefruit juice exerts anti-osteoporotic activities in a prednisolone-induced osteoporosis rat femoral fracture model, possibly via the RANKL/OPG axis.

Abstract Source:

Cytotechnology. 2019 May 30. Epub 2019 May 30. PMID: 31147813

Abstract Author(s):

Eslam Muhammad Bastawy, Rasha Rashad Ahmed, Amer Ali Abd El-Hafeez, Fatma Kamal Abd El-Hady, Toru Hosoi, Koichiro Ozawa, Monir Ali El-Ganzuri

Article Affiliation:

Eslam Muhammad Bastawy


This study aimed to shed light on the protective and therapeutic anti-osteoporotic effects and mechanisms of action of grapefruit juice (GFJ) on prednisolone-induced osteoporosis a rat femoral fracture model. We found that treating rats with GFJ before and/or after prednisolone-induced osteoporosis resulted in increased bone density, total mineral content, and calcium content to counteract the osteoporotic effects of prednisolone. In parallel, the histological and ultrastructural results of the GFJ-treated groups correlated well with enhanced breaking strength of femurs subjected to a constant load. Furthermore, GFJ treatment before and after prednisolone-induced osteoporosis decreased plasma alkaline phosphatase and tartrate-resistant acid phosphatase activities and increased the level of insulin-like growth factor 1. Mechanistically, our immunohistochemistry study showed that GFJ ameliorated prednisolone-induced osteocalcin depletion, decreased receptor activator of nuclear factor kappa-B ligand (RANKL) expression, and increased osteoprotegerin (OPG) expression. GFJ showed a beneficial anti-osteoporotic effect against prednisolone-induced osteoporosis in rats, possibly via the RANKL/OPG axis, suggesting that GFJ might be a good candidate for developing anti-osteoporotic drugs.

Study Type : Animal Study
Additional Links
Pharmacological Actions : Osteoprotective : CK(971) : AC(351)

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