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Role of Organic Cation Transporter 1, OCT1 in the Pharmacokinetics and Toxicity of cis-diammine(pyridine)chloroplatinum(II) and Oxaliplatin in Mice

Role of Organic Cation Transporter 1, OCT1 in the Pharmacokinetics and Toxicity of cis-diammine(pyridine)chloroplatinum(II) and Oxaliplatin in Mice

Shuanglian Li, Ying Chen, Shuzhong Zhang, Swati S More, Xiaozhu Huang, Kathleen M Giacomini

Pharm Res. 2011 Mar;28(3):610-25.

PMID: 21104302

Abstract:

Purpose:
The goal of this study was to test the hypothesis that by controlling intracellular uptake, organic cation transporter 1, Oct1 is a key determinant of the disposition and toxicity of cis-diammine(pyridine)chloroplatinum(II)(CDPCP) and oxaliplatin.
Methods:
Pharmacokinetics, tissue accumulation and toxicity of CDPCP and oxaliplatin were compared between Oct1-/- and wild-type mice.
Results:
After intravenous administration, hepatic and intestinal accumulation of CDPCP was 2.7-fold and 3.9-fold greater in Oct1 wild-type mice (p < 0.001). Deletion of Oct1 resulted in a significantly decreased clearance (0.444 ± 0.0391 ml/min*kg versus 0.649 ± 0.0807 ml/min*kg in wild-type mice, p < 0.05) and volume distribution (1.90 ± 0.161 L/kg versus 3.37 ± 0.196 L/kg in wild-type mice, p < 0.001). Moreover, Oct1 deletion resulted in more severe off-target toxicities in CDPCP-treated mice. Histologic examination of the liver and measurements of liver function indicated that the level of hepatic toxicity was mild and reversible, but was more apparent in the wild-type mice. In contrast, the effect of Oct1 on the pharmacokinetics and toxicity of oxaliplatin in the mice was minimal.
Conclusions:
Our study suggests that Oct1 plays an important role in the pharmacokinetics, tissue distribution and toxicity of CDPCP, but not oxaliplatin.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP106343548	cDPCP		106343-54-8	Price

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