Discovery of coumarin-dihydropyridine hybrids as bone anabolic agents.

Abstract

The concept of molecular hybridization led us to discover a novel series of coumarin-dihydropyridine hybrids that have potent osteoblastic bone formation in vitro and that prevent ovariectomy-induced bone loss in vivo. In this context, among all the compounds screened for alkaline phosphatase activity, four compounds 10, 14, 18, and 22 showed significant activity at picomolar concentrations. A series of other in vitro data strongly suggested compound 18 as the most promising bone anabolic agent, which was further evaluated for in vivo studies. From these studies compound 18 proved to be useful, which at low oral dose of 1 (mg/kg)/day body weight increased bone mass density and volume, expression of osteogenic genes (RUNX2, BMP-2, and ColI), bone formation rate (BFR), and mineral apposition rate (MAR), improved the trabecular microarchitecture, and decreased bone turn over markers in an ovariectomized rodent model for postmenopausal osteoporosis.

• Authors: Koneni V Sashidhara, Manoj Kumar, Vikram Khedgikar, Priyanka Kushwaha, Ram K Modukuri, Abdhesh Kumar, Jyoti Gautam, Divya Singh, Balasubramaniam Sridhar, Ritu Trivedi
• Journal: Journal of medicinal chemistry (J Med Chem) Vol. 56 Issue 1 Pg. 109-22 (Jan 10 2013) ISSN: 1520-4804 [Electronic] United States
• PMID: 23214410 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Anabolic Agents
• Biomarkers
• Coumarins
• Dihydropyridines
• Quinolones
• ethyl 4-(8-sec-butyl-3-(methoxycarbonyl)-2-oxo-2H-chromen-6-yl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate

Topics

• Administration, Oral
• Anabolic Agents (chemical synthesis, chemistry, pharmacology)
• Animals
• Biomarkers (metabolism)
• Bone Density (drug effects)
• Bone Resorption (drug therapy, physiopathology)
• Bone and Bones (drug effects, physiology)
• Calcification, Physiologic (drug effects)
• Cell Differentiation
• Coumarins (chemical synthesis, chemistry, pharmacology)
• Crystallography, X-Ray
• Dihydropyridines (chemical synthesis, chemistry, pharmacology)
• Female
• Gene Expression (drug effects)
• Humans
• Mice
• Osteoblasts (cytology, drug effects, metabolism)
• Osteogenesis (drug effects)
• Osteoporosis, Postmenopausal (drug therapy, etiology, physiopathology)
• Ovariectomy
• Quinolones (chemical synthesis, chemistry, pharmacology)
• Structure-Activity Relationship