Name Mode of Action References
S(+)Camptothecin Binds irreversibly to the DNA topoisomerase I complex leading to the irreversible cleavage of DNA and the destruction of cellular topoisomerase I by the ubiquitin proteasome pathway. Induces apoptosis in many normal and tumor cell lines [72]
Curcumin Potent inhibitor of protein kinase C, EGFR tyrosine kinase and IκB kinase. Induces apoptosis in cancer cells. [73]
Deguelin Inhibitor of activated Akt. Does not affect MAPK, ERK1/2 or JNK. [74]
Etoposide Binds to the DNA topoisomerase II complex to enhance cleavage and inhibit religation; inhibits synthesis of the oncoprotein Mdm2 and induces apoptosis in tumor lines that over express Mdm2. [75]
Formestane Aromatase inhibitor [76]
Fostriecin Interferes with the reversible phosphorylation of proteins that are critical for progression through the cell cycle. [77]
Hispidin Potent inhibitor of protein kinase Cβ. [78]
2Imino1imidazolidineacetic
Acid (Cyclocreatine)
Creatine analog; decreases the rate of ATP production via
creatine kinase and reduces the proliferation of tumor cell lines characterized by high levels of creatine kinase expression.
[79]
Mevinolin Inhibits mevalonic acid production and induces apoptosis in numerous cancer cell lines, perhaps, in part, by inhibiting the isoprenylation of Rhofamily GTPases. [80]
Trichostatin A Histone deacetylase inhibitor that enhances the cytotoxic efficacy of anticancer drugs that target DNA. [81]
Table 5: Enzyme modulators and their mode of action as anticancer agent.