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Repositioning Candidate Details

Candidate ID: R0075
Source ID: DB00282
Source Type: approved
Compound Type: small molecule
Compound Name: Pamidronic acid
Synonyms:
Molecular Formula: C3H11NO7P2
SMILES: NCCC(O)(P(O)(O)=O)P(O)(O)=O
Structure:
DrugBank Description: Pamidronic acid (INN) or pamidronate disodium (USAN), marketed as pamidronate disodium pentahydrate under the brand name Aredia, is a bisphosphonate.
CAS Number: 40391-99-9
Molecular Weight: 235.0695
DrugBank Indication: For the treatment of moderate or severe hypercalcemia associated with malignancy
DrugBank Pharmacology: Pamidronate is in a class of drugs called bisphosphonates. Pamidronate reduces breakdown of the bones. Pamidronate is used in the treatment of Paget's disease of bone; to reduce high levels of calcium in the blood associated with malignancy (cancer); and to reduce the breakdown of bone due to metastases of breast cancer or multiple myeloma.
DrugBank MoA: The mechanism of action of pamidronate is inhibition of bone resorption. Pamidronate adsorbs to calcium phosphate (hydroxyapatite) crystals in bone and may directly block dissolution of this mineral component of bone. In vitro studies also suggest that inhibition of osteoclast activity contributes to inhibition of bone resorption. Pamidronate also targets farnesyl pyrophosphate (FPP) synthase. Nitrogen-containing bisphosphonates (such as pamidronate, alendronate, risedronate, ibandronate and zoledronate) appear to act as analogues of isoprenoid diphosphate lipids, thereby inhibiting FPP synthase, an enzyme in the mevalonate pathway. Inhibition of this enzyme in osteoclasts prevents the biosynthesis of isoprenoid lipids (FPP and GGPP) that are essential for the post-translational farnesylation and geranylgeranylation of small GTPase signalling proteins. This activity inhibits osteoclast activity and reduces bone resorption and turnover. In postmenopausal women, it reduces the elevated rate of bone turnover, leading to, on average, a net gain in bone mass.
Targets: Farnesyl pyrophosphate synthase; Hydroxylapatite; Geranylgeranyl pyrophosphate synthase; Caspase-3; NA
Inclusion Criteria: