7-oxo Staurosporine is an antibiotic originally isolated from S. platensis with diverse biological activites. It inhibits PKC, PKA, phosphorylase kinase, EGFR, and c-Src in vitro (IC50s = 9, 26, 5, 200, and 800 nM, respectively). 7-oxo Staurosporine induces cell cycle arrest in the G2/M phase in human leukemia K562 cells with a minimal effective dose (MED) of 30 ng/ml. It is cytotoxic to P388 mouse leukemia cells that are resistant and susceptible to doxorubicin . 7-oxo Staurosporine inhibits growth of the mycelial, but not yeast form of C. albicans, C. krusei, C. tropicalis, and C. lusitaniae (MICs = 3.1-25 μg/ml). It increases sphingomyelin synthesis in CHO-K1 cells when used at a concentration of 50 nM.
ProMMP-9 inhibitor-3c is a potent and specific proMMP-9 inhibitor which disrupts f MMP-9 homodimerization and prevents association of proMMP-9 with both α4β1 integrin and CD44 and results in the dissociation of EGFR.
Halociline, a derivative of alkaloids that can be isolated from the marine fungus Penicillium griseofulvum, targets MAPK1, MMP-9, and PIK3CA in gastric cancer cells. This action is potentially mediated by diverse pathways, including cancer, lipid metabolism, atherosclerosis, and EGFR tyrosine kinase inhibitor resistance. Halociline possesses antimicrobial, antioxidant, and biofilm inhibitory activities [1] [2].