Calcium phosphate-adsorbable and acid-degradable carboxylated polyrotaxane consisting of β-cyclodextrins suppresses osteoclast resorptive activity

• Published in: Dental Materials Journal Vol. 41; no. 4; pp. 624 - 632
• Main Authors: Yoshihiro YOSHIKAWA, Atsushi TAMURA, Susumu TSUDA, Eisuke DOMAE, Shunyao ZHANG, Nobuhiko YUI, Takashi IKEO, Tatsuya YOSHIZAWA
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society for Dental Materials and Devices 25.07.2022
• ISSN: 0287-4547

Recently, the potential of β-cyclodextrin-thread acid-degradable polyrotaxane (AdPRX) has been emphasized as a therapeutic agent for cholesterol-related metabolic disorders. In this study, we investigated whether carboxymethyl carbamate-modified AdPRX (CMC-AdPRX) can be used for adsorption to calcium phosphate to treat bone diseases. We first synthesized CMC-AdPRX and used it to coat the calcium phosphate plate. RAW264.7 cells were then differentiated into osteoclasts via a receptor activator of nuclear factor-κB ligand, and the number of osteoclasts and the area of absorption lacunae were determined. The number of tartrate-resistant acid phosphatase-positive multinucleated cells was reduced on the CMC-AdPRX-coated plate. The area of the absorption lacunae was smaller with CMC-AdPRX than with AdPRX, which was not carboxy-modified. Our results suggest that CMC-AdPRX can adsorb to calcium phosphate and act on differentiated osteoclasts to suppress their functional expression.