title: [Therapeutic effect of an antineoplastic agent (peplomycin) adsorbed on activated charcoal (PEP-AC)].
abstract: Therapeutic effects of PEP-AC and PEP-saline on pulmonary growth of intratracheally implanted tumor and metastasis into the hilar lymph nodes were studied in mice. Pharmacokinetic studies of PEP-AC and PEP-saline were made by autoradiography (ARG) using 3H-PEP and microbial assay method using B. subtilis. The ARG using 3H-PEP-AC and 3H-PEP-saline demonstrated qualitatively slower elimination of PEP-AC from mouse lung than that of PEP-saline. The half-life time (t1/2) of PEP-AC was estimated to be about 3 days by bioassay method, while about 60 min. was given for PEP-saline. Intratracheal administration of PEP-saline produced no therapeutic effect to pulmonary growth of B16 melanoma, while that of PEP-AC gave a good response depending on doses. Furthermore, PEP-AC inhibited metastasis of B16 melanoma into the hilar lymph nodes. Better therapeutic effects were produced by PEP-AC when decreased inoculum sizes of B16 melanoma or P388 leukemia cells were transplanted.
mesh_terms: D000327:Adsorption; D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage* / Q000378:metabolism; D001761:Bleomycin / Q000008:administration & dosage / Q000378:metabolism; D002606:Charcoal; D007552:Isotonic Solutions; D008175:Lung Neoplasms / Q000188:drug therapy*; D008297:Male; D008545:Melanoma / Q000188:drug therapy*; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009374:Neoplasms, Experimental / Q000188:drug therapy; D017663:Peplomycin
chemical_list: D000903:Antibiotics, Antineoplastic; D007552:Isotonic Solutions; D001761:Bleomycin; D002606:Charcoal; D017663:Peplomycin