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• W4220787705 abstract "Due to the unique calcium mineral composition of bone, bone-targeting agents that coordinate with calcium or recognize hydroxyapatite (HAp) have been used to deliver drugs or as imaging agents for the therapy and diagnosis of bone-related diseases. To date, various bisphosphonates or acidic oligopeptide-based bone-targeting agents have been explored. However, bisphosphonates can induce osteonecrosis, and acidic oligopeptide-based molecules have not yet been validated in in vivo bone imaging. In this study, we newly designed β-glutamic acid (βE)-based bone-targeting agents by conjugating mono-βE or tri-βE with polyethylene glycol (PEG) labeled with Cy7 dye (termed as βE-PEG-Cy7 or βEEE-PEG-Cy7). In vitro and in vivo studies showed that βEEE-PEG-Cy7 binds more strongly to calcium-containing particles and HAp than βE-PEG-Cy7, leading to a clearer visualization of bone tissues and knee joints. Compared to alendronate conjugated-PEG-Cy7 (ALN-PEG-Cy7) as a positive control, βEEE-PEG-Cy7 has lower binding affinity to both HAp and bone tissues, whereas it showed less cytotoxicity toward osteoblastic-like cells. Although βEEE-PEG-Cy7 has a lower performance of binding affinity to HAp and in vivo bone tissues, we believe that βEEE-PEG-Cy7 with less toxicity can be used as a bone-targeting agent for in vivo bone tissue imaging." @default.
• W4220787705 created "2022-04-03" @default.
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• W4220787705 date "2022-03-01" @default.
• W4220787705 modified "2023-09-29" @default.
• W4220787705 title "Novel bidentate β-glutamic acid-based bone-targeting agents for in vivo bone imaging" @default.
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• W4220787705 doi "https://doi.org/10.1016/j.jiec.2022.03.021" @default.
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