4-oxo Cyclophosphamide is an inactive metabolite of the alkylating agent cyclophosphamide .1,2It is formed from cyclophosphamide through a 4-hydroxycyclophosphamide intermediate by aldehyde dehydrogenases.2 1.Struck, R.F., Kirk, M.C., Mellett, L.B., et al.Urinary metabolites of the antitumor agent cyclophosphamideMol. Pharmacol.7(5)519-529(1971) 2.de Jonge, M.E., Huitema, A.D.R., Rodenhuis, S., et al.Clinical pharmacokinetics of cyclophosphamideClin. Pharmacokinet.44(11)1135-1164(2005)
L-Ifosfamide is nitrogen mustard, a chemotherapeutic antineoplastic, and more precisely an alkylating agent structural analog of cyclophosphamide with respect to which presents some differences regard to the antitumor activity and spectrum.
Carboxyphosphamide is an inactive metabolite of the alkylating agent cyclophosphamide .1It is formed from cyclophosphamideviaoxidation of the intermediate metabolite aldophosphamide by aldehyde dehydrogenase. 1.Manthey, C.L., and Sladek, N.E.Kinetic characterization of the catalysis of activated cyclophosphamide (4-hydroxycyclophosphamide/aldophosphamide) oxidation to carboxyphosphamide by mouse hepatic aldehyde dehydrogenasesBiochem. Pharmacol.37(14)2781-2790(1988)
Mafosfamide is a synthetic oxazaphosphorine derivative with antineoplastic properties. Mafosfamide alkylates DNA, forming DNA cross-links and inhibiting DNA synthesis. Although closely related to cyclophosphamide, mafosfamide, unlike cyclophosphamide, does not require hepatic activation to generate its active metabolite 4-hydroxy-cyclophosphamide; accordingly, mafosfamide is potentially useful in the intrathecal treatment of neoplastic meningitis.
Mafosfamide sodium is a synthetic oxazaphosphorine derivative with antineoplastic properties. Mafosfamide sodium alkylates DNA, forming DNA cross-links and inhibiting DNA synthesis. Although closely related to cyclophosphamide, Mafosfamide sodium, unlike cyclophosphamide, does not require hepatic activation to generate its active metabolite 4-hydroxy-cyclophosphamide; accordingly, Mafosfamide sodium is potentially useful in the intrathecal treatment of neoplastic meningitis.
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 lymphocytic leukemia 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.
RKS262 is a specific cyclin CDK inhibitor. RKS262 was identified by structural optimization of Nifurtimox which is currently undergoing phase II clinical trials to treat high-risk neuroblastoma. In a NCI(60) cell-line assay RKS262 exhibited significant cytotoxicity in ovarian cancer cells and a variety of other cell lines exceeding effects of commercial drugs such as cisplatin, 5-FU, cyclophosphamide or sapacitabine. Various leukemia cell-lines were most sensitive (GI(50): ~ 10 nM) while several non-small cell lung cancer cell lines and few cell lines from other tissues were relatively resistant (GI(50) > 1 µM) to RKS262 treatment.