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Abstract
The nitrogen containing bisphosphonates (N-BP) are the drug of choice for treating disease characterised by resorption of bone such as osteoporosis and metastatic bone disease. The overall mechanism of action is achieved through a combination of precise targeting to the bone environment and an extremely potent inhibition of a vital enzyme in an essential metabolic pathway. This targeting to bone is achieved through the phosphate-carbon-phosphate backbone of the drug which gives a high affinity for bone mineral. Once bound to bone the N-BP can be internalised by osteoclasts as they resorb bone where the drug can then interact with its molecular target. The enzyme target of these drugs, FPP synthase, is at a branch point in the mevalonate pathway. This pathway is principally used for the manufacture of cholesterol but also many other biochemicals including farnesyl pyrophosphate and geranylgeranyl pyrophosphate. These prenyl groups are used in the post-transcriptional modification of proteins such as small GTPases that require a lipid membrane anchor to function. The main cellular effect of the blockade of FPP synthase by N-BP is to prevent protein prenylation resulting in disruption to vital signalling pathways and loss of osteoclast function. This review will examine the biochemistry of FPP synthase, inhibition by the NBP and and other potential uses of prenyl synthase inhibitors.
Keywords: Bisphosphonate, farnesyl pyrophosphate synthase, prenylation, osteoporosis, post-transcriptional modification, Padget's disease, metas-tatic bone disease, resorb bone, Pamidronate (PAM), alendro-nate (ALN), ibandronate (IBN), aminoalkyl N-BP, Risedronate (RIS), zoledronate, protein tyrosine phosphatases (PTPase), matrix-metaloproteinases, anti-apoptotic effects, anti-resorptive capacity, flavourings, ubiquinone, ionisation-condensation-elimination process, inhibition constants (Ki), Bone Hook, reduced enzyme inhibition, Risedronate, NE10790, NE58051, NE58022, NE58043, e.coli enzyme (1RQJ), FPP synthase, The Hydrophobic Sidechain, mevalonate pathway, anti-FPPS activity, anti-tumour therapies, heterocyclic N-BP, osteoclast, SAR studies, protozoan parasitic diseases, sleeping sickness Leishmaniasis, Chaga's disease, human tumour cells, dictyoste-lium
Current Pharmaceutical Design
Title: Molecular Targets of the Nitrogen Containing Bisphosphonates: The Molecular Pharmacology of Prenyl Synthase Inhibition
Volume: 16 Issue: 27
Author(s): J. E. Dunford
Affiliation:
Keywords: Bisphosphonate, farnesyl pyrophosphate synthase, prenylation, osteoporosis, post-transcriptional modification, Padget's disease, metas-tatic bone disease, resorb bone, Pamidronate (PAM), alendro-nate (ALN), ibandronate (IBN), aminoalkyl N-BP, Risedronate (RIS), zoledronate, protein tyrosine phosphatases (PTPase), matrix-metaloproteinases, anti-apoptotic effects, anti-resorptive capacity, flavourings, ubiquinone, ionisation-condensation-elimination process, inhibition constants (Ki), Bone Hook, reduced enzyme inhibition, Risedronate, NE10790, NE58051, NE58022, NE58043, e.coli enzyme (1RQJ), FPP synthase, The Hydrophobic Sidechain, mevalonate pathway, anti-FPPS activity, anti-tumour therapies, heterocyclic N-BP, osteoclast, SAR studies, protozoan parasitic diseases, sleeping sickness Leishmaniasis, Chaga's disease, human tumour cells, dictyoste-lium
Abstract: The nitrogen containing bisphosphonates (N-BP) are the drug of choice for treating disease characterised by resorption of bone such as osteoporosis and metastatic bone disease. The overall mechanism of action is achieved through a combination of precise targeting to the bone environment and an extremely potent inhibition of a vital enzyme in an essential metabolic pathway. This targeting to bone is achieved through the phosphate-carbon-phosphate backbone of the drug which gives a high affinity for bone mineral. Once bound to bone the N-BP can be internalised by osteoclasts as they resorb bone where the drug can then interact with its molecular target. The enzyme target of these drugs, FPP synthase, is at a branch point in the mevalonate pathway. This pathway is principally used for the manufacture of cholesterol but also many other biochemicals including farnesyl pyrophosphate and geranylgeranyl pyrophosphate. These prenyl groups are used in the post-transcriptional modification of proteins such as small GTPases that require a lipid membrane anchor to function. The main cellular effect of the blockade of FPP synthase by N-BP is to prevent protein prenylation resulting in disruption to vital signalling pathways and loss of osteoclast function. This review will examine the biochemistry of FPP synthase, inhibition by the NBP and and other potential uses of prenyl synthase inhibitors.
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Cite this article as:
E. Dunford J., Molecular Targets of the Nitrogen Containing Bisphosphonates: The Molecular Pharmacology of Prenyl Synthase Inhibition, Current Pharmaceutical Design 2010; 16 (27) . https://dx.doi.org/10.2174/138161210793563617
DOI https://dx.doi.org/10.2174/138161210793563617 |
Print ISSN 1381-6128 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4286 |
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