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Pathway Description
Pamidronate Action Pathway (new)
Homo sapiens
Drug Action Pathway
Pamidronate also known as pamidronic acid is a second-generation bisphosphonate used to treat Paget's disease, hypercalcemia and osteolytic bone lesions. It acts by binding to hydroxyapatite, during bone resorption it releases pamidronate which is then taken up by osteoclast by endocytosis. Whilst in the cytosol of the osteoclast it goes to inhibit farnesyl pyrophosphate synthase and geranylgeranyl pyrophosphate synthase. By inhibiting these enzymes they cannot go on to generate the components necessary for prenylation of proteins, interfering with this process leads to apoptosis of the osteoclast.
References
Pamidronate Pathway (new) References
Russell RG, Watts NB, Ebetino FH, Rogers MJ: Mechanisms of action of bisphosphonates: similarities and differences and their potential influence on clinical efficacy. Osteoporos Int. 2008 Jun;19(6):733-59. doi: 10.1007/s00198-007-0540-8.
Pubmed: 18214569
Cremers S, Drake MT, Ebetino FH, Bilezikian JP, Russell RGG: Pharmacology of bisphosphonates. Br J Clin Pharmacol. 2019 Jun;85(6):1052-1062. doi: 10.1111/bcp.13867. Epub 2019 Feb 28.
Pubmed: 30650219
Zarychanski R, Elphee E, Walton P, Johnston J: Osteonecrosis of the jaw associated with pamidronate therapy. Am J Hematol. 2006 Jan;81(1):73-5. doi: 10.1002/ajh.20481.
Pubmed: 16369966
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