Synthesis, antitumor activity, distribution and toxicity of 4-[4-[bis(2-chloroethyl)amino]phenyl]-1-hydroxybutane-1 1-bisphosphonic acid (BAD), a new lost derivative with increased accumulation in rat osteosarcoma.
The aim of this study was to investigate whether the newly synthesized bisphosphonic acid-linked N-Lost derivative BAD retains bone-seeking and cytostatic properties. The paper describes experiments on mutagenicity in vitro and on toxicity in vivo. BAD is characterized by very low mutagenic activity toward histidine auxotrophic Salmonella typhimurium strains. Cytotoxic effects were tested in rat osteosarcoma and in Walker carcinosarcoma 256B. The LD50 of i.v. injected BAD was 146 mg/kg. Acute toxicity is probably caused by calcium complexing of the bisphosphonate part of the molecule. Labeling experiments showed moderate accumulation in bone and osteosarcoma, as well as in lung metastases. BAD effected high tumor growth inhibition in osteosarcoma and Walker carcinosarcoma-bearing rats and marked prolongation of survival; histologic and radiographic examination revealed rapid calcification of osteosarcoma and lung metastases. BAD-pretreatment produced protective effects against osteolysis induced by intratibially implanted Walker carcinosarcoma ascites cells. The cytostatic efficacy of equitoxic doses of BAD in rat osteosarcoma is comparable to that of dacarbazine and in Walker carcinosarcoma to that of melphalan.
D000818:Animals; D000970:Antineoplastic Agents / Q000378:metabolism / Q000494:pharmacology* / Q000633:toxicity; D001831:Body Temperature / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D001846:Bone Development / Q000187:drug effects; D001842:Bone and Bones / Q000378:metabolism; D001966:Bromine; D002118:Calcium / Q000378:metabolism; D002279:Carcinoma 256, Walker / Q000188:drug therapy; D004164:Diphosphonates / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005260:Female; D007668:Kidney / Q000378:metabolism; D008297:Male; D008558:Melphalan / Q000494:pharmacology; D051379:Mice; D008815:Mice, Inbred Strains; D009153:Mutagens; D009588:Nitrogen Mustard Compounds / Q000494:pharmacology* / Q000633:toxicity; D012516:Osteosarcoma / Q000188:drug therapy / Q000378:metabolism* / Q000648:ultrastructure; D000077268:Pamidronate; D011868:Radioisotopes; D051381:Rats; D011919:Rats, Inbred Strains; D012486:Salmonella typhimurium / Q000187:drug effects; D012737:Sex Factors; D014018:Tissue Distribution
D000970:Antineoplastic Agents; D004164:Diphosphonates; D009153:Mutagens; D009588:Nitrogen Mustard Compounds; D011868:Radioisotopes; C049704:4-(4-(bis(2-chloroethyl)amino)phenyl)-1-hydroxybutane-1,1-bisphosphonic acid; D000077268:Pamidronate; D008558:Melphalan; D001966:Bromine; D002118:Calcium