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Rogers, Michael J.; Mönkkönen, Jukka; Munoz, Marcia A.
Bone (New York, N.Y.), October 2020, 2020-10-00, Letnik: 139Journal Article
Bisphosphonates (BP) are a class of calcium-binding drug used to prevent bone resorption in skeletal disorders such as osteoporosis and metastatic bone disease. They act by selectively targeting bone-resorbing osteoclasts and can be grouped into two classes depending on their intracellular mechanisms of action. Simple BPs cause osteoclast apoptosis after cytoplasmic conversion into toxic ATP analogues. In contrast, nitrogen-containing BPs potently inhibit FPP synthase, an enzyme of the mevalonate (cholesterol biosynthesis) pathway. This results in production of a toxic metabolite (ApppI) and the loss of long-chain isoprenoid lipids required for protein prenylation, a process necessary for the function of small GTPase proteins essential for the survival and activity of osteoclasts. In this review we provide a state-of-the-art overview of these mechanisms of action and a historical perspective of how they were discovered. Finally, we challenge the long-held dogma that BPs act only in the skeleton and highlight recent studies that reveal insights into hitherto unknown effects on tumour-associated and tissue-resident macrophages. •Bisphosphonates target the skeleton and are selectively internalised by osteoclasts.•Simple bisphosphonates are metabolised intracellularly to toxic ATP analogues.•N-containing bisphosphonates inhibit the mevalonate pathway and prevent protein prenylation.•New approaches to measure prenylation reveal effects of bisphosphonates outside the skeleton.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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