Oxanosine is an analog of guanosine that has been found in S. capreolus and has diverse biological activities, including antibacterial, antiviral, and anticancer properties. It is active against a variety of bacteria, including S. flexneri, P. mirabilis, and E. coli (MICs = 6.25, 12.5, 25 µg ml, respectively, on peptone, but not nutrient, agar). Oxanosine inhibits replication of the HIV-1 strain IIIb in infected CEM and U937, but not H9, cells (EC50s = 7, 27, and >500 µg ml, respectively). It also inhibits the growth of HeLa human cervical cancer cells (IC50 = 32 µg ml) and reduces tumor growth in a murine L1210 lymphocyticleukemia model.
High affinity XIAP antagonist (Kd = 16 nM for the BIR3 domain of XIAP). Exhibits cytotoxicity in a wide range of cancer cell lines in vitro (EC50 = 13 nM in MDA-MB-231 cells). Also displays antitumor activity in a mouse breast cancer xenograft model. Enhances TRAIL-induced apoptosis in chronic lymphocyticleukemia (CLL) cells. Oost et al (2004) Discovery of potent antagonists of the antiapoptotic protein XIAP for the treatment of cancer. J.Med.Chem. 47 4417 PMID:15317454 |Loeder et al (2009) A novel paradigm to trigger apoptosis in chronic lymphocyticleukemia. Cancer Res. 69 8977 PMID:19920200
CI-898 HCl is a lipophilic antifolate inhibitor of dihydrofolate reductase (DHFR). It has enhanced binding to DHFR in the presence of the cofactor NADPH. Cl-898 HCl inhibits cell growth and halts the cell cycle at the G1 S phase in L1210 mouse lymphocyticleukemia cells and is active against methotrexate-resistant cancer cell lines. It also enhances the activity of doxorubicin, cyclophosphamide, and 6-thioguanine (6-TG) in mice with advanced stage P338 leukemia.
Altemicidin is a monoterpene alkaloid originally isolated fromS. sioyaensiswith acaricidal and anticancer activities.1It is acaricidal to two-spotted spider mites (T. urticae) in a greenhouse pot test at concentrations of 10 and 100 ppm. Altemicidin inhibits the growth of murine L1210 lymphocyticleukemia and IMC carcinoma cells (IC50s = 0.84 and 0.82 μg ml, respectively). It is toxic to mice with an LD50value of 0.3 mg kg. 1.Takahashi, A., Kurasawa, S., Ikeda, D., et al.Altemicidin, a new acaricidal and antitumor substance. I. Taxonomy, fermentation, isolation and physico-chemical and biological propertiesJ. Antibiot. (Tokyo)42(11)1556-1561(1989)