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NCI Drug Dictionary

  

masoprocol 
A naturally occurring antioxidant dicatechol originally derived from the creosote bush Larrea divaricatta with antipromoter, anti-inflammatory, and antineoplastic activities. Masoprocol directly inhibits activation of two receptor tyrosine kinases (RTKs), the insulin-like growth factor receptor (IGF-1R) and the c-erbB2/HER2/neu receptor, resulting in decreased proliferation of susceptible tumor cell populations. This agent may induce apoptosis in susceptible tumor cell populations as a result of disruption of the actin cytoskeleton in association with the activation of stress activated protein kinases (SAPKs). In addition, NDGA inhibits arachidonic acid 5-lipoxygenase (5LOX), resulting in diminished synthesis of inflammatory mediators such as prostaglandins and leukotrines; it may prevent leukocyte infiltration into tissues and the release of reactive oxygen species and, at higher concentrations, may also inhibit cyclooxygenase. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
Synonym:nordihydroguaiaretic acid
US brand name:Actinex
Abbreviation:NDGA
Chemical structure:4,4'-(2,3-Dimethyl-1,4-butanediyl)bis[1,2-benzenediol]