Chemical and biological properties of a new cis-diammineplatinum(II) complex containing para-aminobenzoic acid as amino ligand

B. Parodi, M. Esposito, M. Viale, S. Cafaggi, M. Vannozzi

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper we report on the synthesis, characterization and preliminary pharmacological evaluation of a new platinum(II) complex obtained by reaction of cis-diamminedichloroplatinum(II) (DDP) with para-aminobenzoic acid (PABA). The structure of this platinum compound was defined by UV, IR, 1H-NMR and elemental analysis. DPAB tested in vitro and in vivo against P388 leukemic cells displayed good antiproliferative (IC50 values after 48 h exposure of cells = 3 μg/ml) and antitumor activity (T/C% = 150). This compound also possesses desirable physical properties, such as a good solubility and stability in aqueous media, and a low toxicity (LD50 > 1200 mg/kg body weight) combined with a moderate nephrotoxic activity [plasma urea nitrogen (PUN) level: 36 ± 8(SD) mg/100 ml]. DPAB was cleared from plasma ultrafiltrate (UF-plasma) very rapidly [clearance (CL), 55.3 ml x min-1 x kg-1], showing a half-life of 13.6 min. Platinum exposure (AUC) in the kidney was 2.6 times greater than that found in UF-plasma. AUCS for liver, stomach and UF-plasma were similar, while the AUC value for the spleen was 1.7 times lower than that of UF-plasma. These preliminary results seem to hold interest for further preclinical evaluation of the biological activity of this new platinum compound.

Original languageEnglish
Pages (from-to)895-899
Number of pages5
JournalAnticancer Research
Volume15
Issue number3
Publication statusPublished - 1995

Keywords

  • Antitumor activity
  • Cisplatin-PABA complex
  • Cytotoxicity
  • Pharmacokinetics

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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