Objective: To analyze the influence of an oral bisphosphonate and compare the potency to intravenous bisphosphonates on various cell types as regards the rarity of bisphosphonate-associated osteonecrosis of the jaw (BP-ONJ) caused by oral bisphosphonate.
Materials And Methods: A viability assay (MTT), a migration assay (Boyden chamber), and an apoptosis assay (Caspase-Glo® 3/7) were performed to analyze the effect of bisphosphonates on human fibroblasts, umbilical vein endothelial cells (HUVEC), and osteoblasts.
Results: Alendronate and intravenous bisphosphonates suppressed cell viability and migration, and induced apoptosis in all tested cell types. Alendronate had a greater impact than ibandronate on the characteristics in fibroblasts and osteoblasts but not as strong as zoledronate.
Conclusions: The incidence of BP-ONJ in oral bisphosphonate treatment is reported to be much lower than that in intravenous bisphosphonates. However, the influences of alendronate on human cells were at least as strong as ibandronate, although it was lower than zoledronate.
Clinical Relevance: Alendronate showed strong enough effects to suppress human somatic cells and was comparable to certain intravenous bisphosphonates in potency. This study suggests that the lower incidence of BP-ONJ in alendronate treatment is not originated by its potency, but might be due to the low bioavailability of alendronate, lower dosing on a daily basis, and having no additional therapies.
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http://dx.doi.org/10.1007/s00784-018-2349-6 | DOI Listing |
J Med Case Rep
January 2025
Lacor Hospital-Gulu, Gulu, Uganda.
Introduction: Osteogenesis imperfecta is a rare inherited connective tissue disorder that results in excessive bone fragility due to defects in collagen production. The majority of osteogenesis imperfecta cases are inherited in an autosomal dominant pattern, and 17 genetic causes have been identified. Diagnosis is usually based on clinical presentation and low bone mineral density scores, while treatment involves a multidisciplinary approach using medical therapies such as bisphosphonates, vitamin C, and pamidronate.
View Article and Find Full Text PDFJBMR Plus
February 2025
INSERM UMR 1033, Univ Lyon, Université Claude Bernard Lyon 1, F-69008 Lyon, France.
OI, or bone brittle disease, is characterized by increased mineralization of bone matrix independently of clinical severity. So, a beneficial effect of antiresorptive treatments such as bisphosphonates (BP) is questionable. We aim to compare the bone matrix characteristics before and after BP pamidronate (PAM).
View Article and Find Full Text PDFAnn Endocrinol (Paris)
January 2025
Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, AP-HP, Hôpital Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction, Centre de Référence des Maladies Rares du Métabolisme du Calcium et du Phosphate, 94 275 Le Kremlin Bicêtre, France. Electronic address:
Preoperative treatment of PHPT aims to 1) manage severe and/or symptomatic hypercalcemia and 2) prevent postoperative hypocalcemia. Severe hypercalcemia, defined as a blood calcium level ≥ 3.5 mmol/L, requires admission to hospital in a conventional or critical care unit, depending on clinical symptoms and comorbidities.
View Article and Find Full Text PDFDrugs Aging
January 2025
Orthopedics and Traumatology Department, Department of Medicine and Surgery, University of Perugia Medical School, Perugia, Italy.
Osteoporosis has been usually considered a female disease, generally causing more fracture risk and complications in adult and older women compared to older men. While vertebral fractures occur in a small proportion of men during middle age, men generally fracture about 10 years later than women, with significant increases in fracture risk after about age 75. Independent of age, men experiencing fragility fractures have a higher risk of life-threatening events compared to women, but the risk of secondary fragility fracture overlaps between men and women.
View Article and Find Full Text PDFBMJ Open Ophthalmol
December 2024
Department of Ophthalmology, Oslo University Hospital, Oslo, Norway.
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