[1aS-(1aR*,2Z,4E,14*,15aR*)]-8-Chloro-1a,14,15,15a-tetrahydro-9,11-dihydroxy-14-methyl-6H-oxireno[e][2]benzoxacyclotetradecin-6,12(7H)-dioneRadicicol from Diheterospora chlamydosporiaMonorden
Biochem/physiol Actions Antifungal macrolactone antibiotic that inhibits protein tyrosine kinase. Radicicol induces the differentiation of HL-60 cells into macrophages, blocking cell cycle at G1 and G2. It suppresses NIH 3T3 cell transformation by diverse oncogenes such as src, ras and mos and also suppresses the expression of mitogen-inducible cyclooxygenase-2. As a cell differentiation modulator, radicicol has anti-angiogenic activity in vivo, inhibiting the proliferation of and plasminogen activator production by vascular endothelial cells. Caution Photosensitive