Date of this Version
Bisphosphonates commonly used to treat osteoporosis, Paget’s disease, multiple myeloma, hypercalcemia of malignancy and osteolytic lesions of cancer metastasis have been associated with bisphosphonate-associated jaw osteonecrosis (BJON). The underlying pathogenesis of BJON is unclear, but disproportionate bisphosphonate concentration in the jaw has been proposed as one potential etiological factor. This study tested the hypothesis that skeletal biodistribution of intravenous bisphosphonate is anatomic site-dependent in a rat model system.
Materials and Methods
Fluorescently labeled pamidronate was injected intravenously in athymic rats of equal weights followed by in vivo whole body fluorimetry, ex vivo optical imaging of oral, axial and appendicular bones and ethylenediaminetetraacetic acid bone decalcification to assess hydroxyapatite-bound bisphosphonate.
Bisphosphonate uptake and bisphosphonate released per unit calcium were similar in oral and appendicular bones but lower than those in axial bones. Hydroxyapatite-bound bisphosphonate liberated by sequential acid decalcification was highest in oral relative to axial and appendicular bones (p < 0.05).
This study demonstrates regional differences in uptake and release of bisphosphonate from oral, axial and appendicular bones of immune deficient rats.
This is the pre-peer reviewed version of the following article: [Wen, D., Qing, L., Harrison, G., Golub, E., & Akintoye, S. O. (2011). Anatomic Site Variability in Rat Skeletal Uptake and Desorption Of Fluorescently Labeled Bisphosphonate. Oral Diseases, 17(4), 427–432. http://doi.org/10.1111/j.1601-0825.2010.01772.x], which has been published in final form at [http://dx.doi.....2010.01772.x]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Bisphosphonate, osteonecrosis, jaw, fluorescent labeling, bone
Wen, D., Qing, L., Harrison, G., Golub, E., & Akintoye, S. O. (2011). Anatomic Site Variability in Rat Skeletal Uptake and Desorption Of Fluorescently Labeled Bisphosphonate. 17 (4), 427-432. http://dx.doi.org/10.1111/j.1601-0825.2010.01772.x
Date Posted: 10 August 2018