Abstract
Purpose
To evaluate cisplatin (CDDP) pharmacokinetics after its intravenous (IV) or intrahepatic arterial administration (IHA) in healthy pigs with or without embolization by absorbable gelatine.
Material and Methods
We analysed plasmatic and hepatic drug concentration in four groups of six mini-pigs each according to the modality of administration of CDDP (1 mg/kg): IV, IHA, IHA with partial embolization using absorbable gelatine (IHA-Pe), and IHA with complete embolization (IHA-Te). Unbounded plasmatic and hepatic platinum concentrations were measured. Concentration and pharmacokinetics parameters were compared using analysis of variance.
Results
For all groups, there was a rapid and biexponential decrease in free platinum concentration. Plasmatic terminal half-life (T1/2) was significantly decreased after embolization at 191, 178, 42, and 41 min after IV, IHA, IHA-Pe, and IHA-Te administration, respectively. Maximal plasmatic concentration and systemic exposure to CDDP (AUC24) values were significantly decreased after embolization (Cmax p = 0.0075; AUC24 p = 0.0053). Hepatic CDDP concentration rapidly peaked and then decreased progressively. After 24 h, the residual concentration represented 45, 47, 60, and 63 % of Cmax, respectively, after IV, IHA, IHA-Pe, and IHA-Te. Hepatic T1/2 and AUC∞ values were increased after embolization, but the differences were not statistically significant.
Conclusion
This preliminary study confirms the feasibility of a pig model to study systemic and hepatic CDDP pharmacokinetics. Systemic exposure is lower after embolization, which could minimize systemic toxicity. Hepatic T1/2 elimination and hepatic exposition values are increased with IHA compared with IV administration.
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Acknowledgments
We thank Sylvie Massoulier, Carine Nicolas, and Denis Gourcy for their contributions during the experiment.
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All the authors declared that they have no conflict of interest.
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Chabrot, P., Cardot, JM., Guibert, P. et al. Cisplatin Pharmacokinetics in Nontumoral Pig Liver Treated With Intravenous or Transarterial Hepatic Chemoembolization. Cardiovasc Intervent Radiol 35, 1467–1474 (2012). https://doi.org/10.1007/s00270-012-0386-0
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DOI: https://doi.org/10.1007/s00270-012-0386-0