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- W3119746557 abstract "Abstract Although the non-selective β-blocker, propranolol, improves bone density with PTH treatment in mice, the mechanism of this effect is unclear. To address this, we used a combination of in vitro and in vivo approaches to address how propranolol influences bone remodeling in the context of PTH treatment. In female C57BL/6J mice, intermittent PTH and propranolol had complementary effects in the trabecular bone of the distal femur and L5 vertebra, with combination treatment achieving micro-architectural parameters beyond that of PTH alone. Combined treatment improved the serum bone formation marker, P1NP, but did not impact other histomorphometric parameters relating to osteoblast function at the L5. In vitro , propranolol amplified the acute, PTH-induced, intracellular calcium signal in osteoblast-like cells. The most striking finding, however, was suppression of PTH-induced bone resorption. Despite this, PTH-induced receptor activator of nuclear factor kappa-B ligand (RANKL) mRNA and protein levels were unaltered by propranolol, which led us to hypothesize that propranolol could act directly on osteoclasts. Using in situ methods, we found Adrb2 expression in osteoclasts in vivo , suggesting β-blockers may directly impact osteoclasts. Taken together, this work suggests a strong anti-osteoclastic effect of non-selective β-blockers in vivo , indicating that combining propranolol with PTH could be beneficial to patients with extremely low bone density." @default.
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- W3119746557 date "2020-01-10" @default.
- W3119746557 modified "2023-10-15" @default.
- W3119746557 title "Propranolol promotes bone formation and limits resorption through novel mechanisms during anabolic parathyroid hormone treatment in female C57BL/6J mice" @default.
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- W3119746557 doi "https://doi.org/10.1101/2020.01.08.898320" @default.
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