Abstract:
:Microspheres containing cisplatin (CDDP) embedded in poly-d,l-lactic acid (PLA) and polyethylene glycol acid (CDDP-PPMS) were developed to improve treatment of malignant effusions. In vitro studies demonstrated that CDDP was released continuously for more than 4 weeks from CDDP-PPMS without initial burst. CDDP-PPMS was compared with CDDP aqueous solution (CDDP-SOL) by i.p. administration in rats for 1) tissue distribution, 2) toxicity and 3) therapeutic effects against Yoshida sarcoma. We found that the CDDP concentration in the omentum was maintained at a higher level than in the CDDP-SOL group, while the particles of CDDP-PPMS were observed in the stomata of the omentum by electron microscopy. Concentrations of CDDP in the lung, liver, kidney and blood were lower in the CDDP-PPMS group than in the CDDP-SOL group. All rats given CDDP-PPMS containing < or = 28 mg/kg were alive, whereas in the CDDP-SOL group, all rats given > or = 16 mg/kg died from side effects. The LD50 of CDDP-PPMS and CDDP-SOL were 32.8 and 14.8 mg/kg, respectively. The survival of rats with peritoneal metastasis was better in the CDDP-PPMS group than in the CDDP-SOL group.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Tokuda K,Natsugoe S,Shimada M,Kumanohoso T,Baba M,Takao S,Nakamura K,Yamada K,Yoshizawa H,Hatate Y,Aikou Tdoi
10.1002/(sici)1097-0215(19980529)76:5<709::aid-ijcsubject
Has Abstractpub_date
1998-05-29 00:00:00pages
709-12issue
5eissn
0020-7136issn
1097-0215pii
10.1002/(SICI)1097-0215(19980529)76:5<709::AID-IJCjournal_volume
76pub_type
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