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Open AccessArticle

Egg White Ovotransferrin Attenuates RANKL-Induced Osteoclastogenesis and Bone Resorption

Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada
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Author to whom correspondence should be addressed.
Nutrients 2019, 11(9), 2254; https://doi.org/10.3390/nu11092254
Received: 13 August 2019 / Revised: 17 September 2019 / Accepted: 17 September 2019 / Published: 19 September 2019
(This article belongs to the Special Issue Effect of Bioactive Peptides on Human Health)
Ovotransferrin, a member of the transferrin family, is the second main protein found in egg white. Ovotransferrin was reported to have antimicrobial, antioxidant, and immunomodulating activities. The aim of this work was to characterize the cellular and molecular functions of egg white ovotransferrin on osteoclasts differentiation and function. Osteoclasts were prepared from mouse macrophage RAW 264.7 cells stimulated with receptor activator of nuclear factor κB ligand (RANKL). Ovotransferrin inhibited osteoclasts differentiation and the calcium–phosphate resorptive ability via the suppression of RANKL-induced nuclear factor κ-light chain-enhancer of activated B cells (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathways. Ovotransferrin induced apoptosis of matured osteoclasts, accompanied by increased expression of Bcl-2-like protein 11 (Bim) and Bcl-2-assoicated death promoter (Bad), but decreased expression of B-cell lymphoma 2 (Bcl-2) and B-cell lymphoma-extra-large (Bcl-xl). We established a novel role of egg white ovotransferrin as an inhibitor of osteoclastogenesis, which may be used for the prevention of osteoporosis. View Full-Text
Keywords: osteoclasts; osteoclastogenesis; NF-κB pathway; MAPK pathway; apoptosis osteoclasts; osteoclastogenesis; NF-κB pathway; MAPK pathway; apoptosis
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MDPI and ACS Style

Shang, N.; Wu, J. Egg White Ovotransferrin Attenuates RANKL-Induced Osteoclastogenesis and Bone Resorption. Nutrients 2019, 11, 2254.

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