title: Synthesis of calcium phosphate-binding liposome for drug delivery.
abstract: Metastatic bone disease is often associated with bone pain, pathologic fractures, and nerve compression syndromes. Effective therapies to inhibit the progression of bone metastases would have important clinical benefits. Therefore, we developed a novel calcium phosphate-binding liposome for a bone-targeting drug delivery system. We synthesized a novel amphipathic molecule bearing a bisphosphonate (BP) head group to recognize and bind to hydroxyapatite (HA). We demonstrated that the liposomes having BP moieties show high affinity for HA. Doxorubicin-loaded liposomes adsorbed on the surface of HA significantly reduce the number of viable human osteosarcoma MG63 cells. This shows that the liposomes can be excellent carriers for anticancer drugs because they specifically target bone tissue. This calcium phosphate-binding liposome system could be used with many drugs for bone-related diseases such as osteoporosis, rheumatoid arthritis, and multiple myeloma.
authors.affiliation: Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry 4-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan. anada@mail.tains.tohoku.ac.jp
authors.forename: Takahisa
authors.initials: T
authors.lastname: Anada
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Takeda
authors.forename: Yoshitomo
authors.initials: Y
authors.lastname: Honda
authors.forename: Kazuo
authors.initials: K
authors.lastname: Sakurai
authors.forename: Osamu
authors.initials: O
authors.lastname: Suzuki
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000494:pharmacology; D001172:Arthritis, Rheumatoid / Q000188:drug therapy; D001859:Bone Neoplasms / Q000188:drug therapy; D001842:Bone and Bones / Q000187:drug effects; D002130:Calcium Phosphates / Q000737:chemistry*; D045744:Cell Line, Tumor; D002626:Chemistry, Pharmaceutical / Q000379:methods; D004317:Doxorubicin / Q000494:pharmacology; D016503:Drug Delivery Systems; D015195:Drug Design; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D008081:Liposomes / Q000737:chemistry*; D009101:Multiple Myeloma / Q000188:drug therapy; D009362:Neoplasm Metastasis; D010024:Osteoporosis / Q000188:drug therapy; D011485:Protein Binding
chemical_list: D000970:Antineoplastic Agents; D002130:Calcium Phosphates; D008081:Liposomes; D004317:Doxorubicin; C020243:calcium phosphate