Design and synthesis of novel bone-targeting dual-action pro-drugs for the treatment and reversal of osteoporosis
摘要:
There is an important medical need for effective therapies to redress the general bone loss associated with advanced osteoporosis. Prostaglandin E-2 and related EP4 receptor agonists have been shown to stimulate bone regrowth but their use has been limited by systemic side effects. Herein is described the design and synthesis of novel dual-action bone-targeting conjugate pro-drugs where two classes of active agents, a bone growth stimulating prostaglandin E-2 EP4 receptor subtype agonist (5 or 6) and a bone resorption inhibitor bisphosphonate, alendronic acid (1), are coupled using metabolically labile carbamate or 4-hydroxyphenylacetic acid based linkers. Radiolabelled conjugates 9, 11a/b and 25 were synthesized and evaluated in vivo in rats for uptake of the conjugate into bone and subsequent release of the EP4 agonists over time. While conjugate 11a/b was taken up (9.0% of initial dose) but not released over two weeks, conjugates 9 and 25 were absorbed at 9.4% and 5.9% uptake of the initial dose and slowly released with half-lives of approximately 2 weeks and 5 days respectively. These conjugates were well tolerated and offer potential for sustained release and dual synergistic activity through their selective bone targeting and local release of the complimentary active components. (C) 2012 Elsevier Ltd. All rights reserved.
[EN] PROSTAGLANDIN-BISPHOSPHONATE CONJUGATE COMPOUNDS, METHODS OF MAKING SAME, AND USES THEREOF<br/>[FR] COMPOSÉS CONJUGUÉS PROSTAGLANDINE-BISPHOSPHONATE, LEURS MÉTHODES DE FABRICATION ET LEURS UTILISATIONS
申请人:UNIV FRASER SIMON
公开号:WO2011147034A1
公开(公告)日:2011-12-01
The invention provides, in part, amino-bisphosphonate-prostaglandin conjugate compounds as well as methods for their synthesis. Said compounds may be used as EP4 agonist compounds in the prevention or treatment of conditions associated with abnormal or excessive bone loss, with abnormal or reduced bone resorption, or with abnormal calcium metabolism.
Design and synthesis of novel bone-targeting dual-action pro-drugs for the treatment and reversal of osteoporosis
作者:Steve Arns、Romelo Gibe、Anne Moreau、M. Monzur Morshed、Robert N. Young
DOI:10.1016/j.bmc.2012.01.024
日期:2012.3
There is an important medical need for effective therapies to redress the general bone loss associated with advanced osteoporosis. Prostaglandin E-2 and related EP4 receptor agonists have been shown to stimulate bone regrowth but their use has been limited by systemic side effects. Herein is described the design and synthesis of novel dual-action bone-targeting conjugate pro-drugs where two classes of active agents, a bone growth stimulating prostaglandin E-2 EP4 receptor subtype agonist (5 or 6) and a bone resorption inhibitor bisphosphonate, alendronic acid (1), are coupled using metabolically labile carbamate or 4-hydroxyphenylacetic acid based linkers. Radiolabelled conjugates 9, 11a/b and 25 were synthesized and evaluated in vivo in rats for uptake of the conjugate into bone and subsequent release of the EP4 agonists over time. While conjugate 11a/b was taken up (9.0% of initial dose) but not released over two weeks, conjugates 9 and 25 were absorbed at 9.4% and 5.9% uptake of the initial dose and slowly released with half-lives of approximately 2 weeks and 5 days respectively. These conjugates were well tolerated and offer potential for sustained release and dual synergistic activity through their selective bone targeting and local release of the complimentary active components. (C) 2012 Elsevier Ltd. All rights reserved.