Abstract:
:The present study was designed to compare the nephrotoxicity induced by the three platinum compounds cisplatin (CDDP), carboplatin (CBDCA) and transplatin (TDDP) in vitro and to obtain information to elucidate the mechanism of platinum compound-induced nephrotoxicity. Rat or rabbit renal cortical slices were incubated for different periods of time in platinum compound-containing media (0.42 or 1.67 mM) and thereafter monitored for platinum content, tetraethylammonium(TEA) and paraaminohippurate(PAH) accumulation and gluconeogenesis. Malondialdehyde(MDA) content of slices was determined as a parameter of lipid peroxidation. Activity of glucose-6-phosphatase of rat renal microsomes was investigated after platinum-compound exposure. In all series of experiments the effect of the antioxidant N,N'diphenyl-p-phenylenediamine (DPPD) was tested. CBDCA showed no effects on all parameters of renal cell function at all concentrations and all time points investigated, except for the activity of glucose-6-phosphatase, which was slightly affected by CBDCA. CBDCA-induced MDA production was lower, compared to CDDP, which showed marked toxic effects on TEA and PAH accumulation, gluconeogenesis and glucose-6-phosphatase activity. The onset of CDDP-induced alterations was dependent on drug concentration. MDA production was reduced by DPPD. Protection against the platinum compound-induced decrease in TEA and PAH accumulation was observed after the use of DPPD. DPPD had no protective effect on CDDP-induced inhibition of gluconeogenesis and glucose-6-phosphatase, which might indicate an effect on gluconeogenesis by direct inhibition of glucose-6-phosphatase. DPPD did not alter uptake of platinum compounds in rat renal cortical slices. TDDP showed different in vitro properties compared to in vivo conditions.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Arch Toxicoljournal_title
Archives of toxicologyauthors
Hannemann J,Baumann Kdoi
10.1007/BF01973462subject
Has Abstractpub_date
1990-01-01 00:00:00pages
393-400issue
5eissn
0340-5761issn
1432-0738journal_volume
64pub_type
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