Tartronates: A New Generation of Drugs Affecting Bone Metabolism
| Autor: | Marcello Allegretti, Wilma Sabbatini, Gandolfi Carmelo A, Pellegrini Luigi, Roberto Anacardio, Giancarlo Sciortino, Gabriella Melillo, Gaetano Clavenna, Gianfranco Caselli, Simonetta Fiorentino, Marco Mantovanini, Anna Teti, Riccardo Bertini |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
medicine.medical_specialty
Bone disease Endocrinology Diabetes and Metabolism Drug Evaluation Preclinical Osteoclasts In Vitro Techniques Bone and Bones Bone resorption Bone remodeling Mice Calcitriol Bone Density Osteogenesis Osteoclast Internal medicine medicine Animals Humans Tartronates Orthopedics and Sports Medicine Bone Resorption Tartrate-resistant acid phosphatase Mice Inbred C3H biology Chemistry Infant medicine.disease Rats Resorption Bone Diseases Metabolic medicine.anatomical_structure Endocrinology Drug Design Osteocalcin biology.protein Ovariectomized rat Calcium Cattle Rabbits Biomarkers |
| Zdroj: | Journal of Bone and Mineral Research. 12:972-981 |
| ISSN: | 0884-0431 |
| DOI: | 10.1359/jbmr.1997.12.6.972 |
| Popis: | In the search for a new class of bone-sparing agents for treating osteopenic disorders, we hypothesized that tartronic acid derivatives, sharing the chemical characteristics both of bisphosphonates and of Gla residues contained in matrix proteins such as osteocalcin, could positively affect bone metabolism. A series of tartronates was therefore tested for their ability to affect bone metabolism. In vitro resorption tests were performed examining pit formation by freshly isolated rat and rabbit osteoclasts plated onto bone slices and exposed to the drugs for 48 h. Tartronates bearing a linear side-chain (DF 1222 and DF 1363A) were the most effective in inhibiting pit excavation in the pM-nM range. Tartronates did not affect osteoclast viability, number, adhesion, or tartrate resistant acid phosphatase activity. Transient cell retraction was observed in osteoclasts plated onto glass and exposed to DF 1222. The maximal effect was seen in cells treated for 4 h at a concentration of 1 pM. DF 1222 accelerated mineralization in cultures of periosteal cells without affecting other osteoblast-like functions. This product was therefore tested in vivo in ovariectomized mice. Bone mass in femur was evaluated, by ash gravimetry, 21 days after ovariectomy. Unfortunately, DF 1222, the most active of tartronates in vitro, was inactive in this test because of its high hydrophilicity and the subsequent too short residence time. On the contrary, its tetrahydropyranyl ether derivative, DF 1363A, endowed with a significantly higher lipophilicity, showed a dose-dependent bone-sparing effect when administered subcutaneously at 10, 30, and 100 mg/kg/die, thus confirming the activity seen in in vitro tests. Because of their feasible parallel effect on both bone resorption and formation, tartronate derivatives may be tested to candidate this class of products for clinical studies. |
| Databáze: | OpenAIRE |
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