| Literature DB >> 32744428 |
Ryu Hashimoto1, Masafumi Minoshima1, Junichi Kikuta2,3, Shinya Yari2, Steven D Bull4, Masaru Ishii2,3, Kazuya Kikuchi1,3,5.
Abstract
A rationally designed pH-activatable fluorescent probe (pHocas-RIS) has been used to measure localised pH levels in osteocytic lacunae in bone tissue. Conjugation of the moderate bone-binding drug risedronate to a pH-activatable BODIPY fluorophore enables the probe to penetrate osteocytic lacunae cavities that are embedded deep within the bone matrix. After injection of pHocas-RIS, any osteocytic lacunae caused by bone-resorbing osteocytes cause the probe to fluoresce in vivo, thus allowing imaging by intravital two-photon excitation microscopy. This pH responsive probe enabled the visualization of the bone mineralizing activities of acid producing osteocytes in real time, thus allowing the study of their central role in remodeling the bone-matrix in healthy and disease states.Entities:
Keywords: fluorescent probes; intravital imaging; osteocytes; osteocytic lacunae; pH-activatable probes
Mesh:
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Year: 2020 PMID: 32744428 PMCID: PMC7692916 DOI: 10.1002/anie.202006388
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336