Fosbretabulin

Fosbretabulin
Clinical data
Other namesCombretastatin A-4 phosphate; CA4P; CA4PD; fosbretabulin disodium; fosbretabulin tromethamine
Legal status
Legal status
  • Investigational
Identifiers
IUPAC name
  • Phosphoric acid mono-{2-methoxy-5-[(Z)-2-(3,4,5-trimethoxy-phenyl)-vinyl]-phenyl} ester
CAS Number
PubChem CID
ChemSpider
UNII
Chemical and physical data
FormulaC18H21O8P
Molar mass396.332 g·mol−1
3D model (JSmol)
SMILES
  • O=P(O)(O)Oc1c(OC)ccc(c1)\C=C/c2cc(OC)c(OC)c(OC)c2
InChI
  • InChI=1S/C18H21O8P/c1-22-14-8-7-12(9-15(14)26-27(19,20)21)5-6-13-10-16(23-2)18(25-4)17(11-13)24-3/h5-11H,1-4H3,(H2,19,20,21)/b6-5-
  • Key:WDOGQTQEKVLZIJ-WAYWQWQTSA-N
  (verify)

Fosbretabulin (also known as combretastatin A-4 phosphate or CA4P) is a microtubule destabilizing experimental drug, a type of vascular-targeting agent, a drug designed to damage the vasculature (blood vessels) of cancer tumours causing central necrosis. It is a derivative of combretastatin. It is formulated as the salts fosbretabulin disodium and fosbretabulin tromethamine.[1]

Fosbretabulin is a prodrug. In vivo, it is dephosphorylated to its active metabolite, combretastatin A-4.[2]

In July 2007, the pharmaceutical company OXiGENE initiated a 180-patient phase III clinical trial of fosbretabulin in combination with carboplatin for the treatment of anaplastic thyroid cancer.[3] There is currently no fully FDA approved treatment for this form of cancer. By 2017, it had completed multiple clinical trials (e.g. for solid tumours,[4] non-small cell lung cancer[5]) with more in progress.[6]

See also

  • Combretastatin, e.g. for the chemical synthesis

References

  1. ↑ Clinical trial number NCT02132468 for "A Ph 2 Study to Investigate the Safety and Activity of Fosbretabulin Tromethamine (CA4P) in the Treatment of Well-Differentiated, Low-to-Intermediate-Grade Unresectable, Recurrent or Metastatic PNET or GI-NET Neuroendocrine Tumors/Carcinoid With Elevated Biomarkers" at ClinicalTrials.gov
  2. ↑ "Fosbretabulin disodium". National Cancer Institute. U.S. Department of Health and Human Services.
  3. ↑ Clinical trial number NCT00507429 for "A Phase II/III Study to Evaluate the Safety and Efficacy of Combretastatin A-4 Phosphate in Combination With Paclitaxel and Carboplatin in Comparison With Paclitaxel and Carboplatin Against Anaplastic Thyroid Carcinoma [FACT]" at ClinicalTrials.gov
  4. ↑ Clinical trial number NCT00113438 for "A Randomized Open-Labeled Phase II Study of Combretastatin A-4 Phosphate in Combination With Paclitaxel and Carboplatin to Evaluate the Safety and Efficacy in Subjects With Advanced Imageable Malignancies" at ClinicalTrials.gov
  5. ↑ Clinical trial number NCT00653939 for "A Phase II Study to Assess the Safety and Efficacy of the Combination of Carboplatin, Paclitaxel, and Bevacizumab ± Combretastatin A4 Phosphate (CA4P) Followed by Bevacizumab ± CA4P in Subjects With Chemotherapy Naïve Stage IIIB/IV Non-Squamous Cell Histology Non-Small Cell Lung Cancer (NSCLC)" at ClinicalTrials.gov
  6. ↑ "Search of: CA4P - List Results - ClinicalTrials.gov". clinicaltrials.gov.


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