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Effect of change in transporter expression on gadolinium‐ethoxybenzyl‐diethylenetriamine pentaacetic acid‐enhanced magnetic resonance imaging during hepatocarcinogenesis in rats
Author(s) -
Tsuda Natsuko,
Harada Kenichi,
Matsui Osamu
Publication year - 2011
Publication title -
journal of gastroenterology and hepatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.214
H-Index - 130
eISSN - 1440-1746
pISSN - 0815-9319
DOI - 10.1111/j.1440-1746.2010.06494.x
Subject(s) - medicine , thioacetamide , magnetic resonance imaging , multidrug resistance associated protein 2 , gadolinium , cirrhosis , hepatocellular carcinoma , gastroenterology , liver cancer , nuclear medicine , endocrinology , transporter , chemistry , atp binding cassette transporter , biochemistry , radiology , organic chemistry , gene
Background and Aims: To analyze the difference in signal intensity on gadolinium‐ethoxybenzyl‐diethylenetriamine pentaacetic acid (Gd‐EOB‐DTPA)‐enhanced magnetic resonance imaging (MRI) among various hepatocellular nodules during hepatocarcinogenesis as correlated with the expressions of the transporters of Gd‐EOB‐DTPA. Methods: We received institutional animal review board approval prior to the commencement of all studies. Forty rats were divided into three groups. The rats in the tumor groups received N‐nitrosomorpholine solution ( n = 16), and rats in the cirrhosis group (thioacetamide [TAA] group) received thioacetamide solution ( n = 12). As a control, the remaining 12 rats were fed normal water. Each group was divided into two sub‐groups: Group 1 for Gd‐EOB‐DTPA‐enhanced MRI (0.025 mmol Gd/kg, n = 7) and Group 2 for reverse transcription‐polymerase chain reaction to compare transporter (oatp1 and mrp2) expressions ( n = 5 for control and TAA groups, n = 9 for tumor groups). Results: Signal enhancement of tumors decreased according to the progress of hepatocarcinogenesis. Although the relative enhancement of each tumor group was significantly lower than that of the control group ( P < 0.01), and there was no significant difference between TAA, hyperplastic nodules (HPN), and HCC well groups. The relative enhancement of the HCC mod group was significantly lower than the other groups ( P < 0.01). The oatp1 expression of HPN tended to be higher than those of HCC well and HCC mod . The mrp2 expression of TAA was significantly higher than those of HCC well , HCC mod , HPN and control ( P < 0.01). The mrp2 expression of HPN tended to be higher than those of HCC well and HCC mod . Conclusion: It was suggested that the signal enhancement on Gd‐EOB‐DTPA‐enhanced MRI would correlate with the transporter expression in various hepatocellular nodules during hepatocarcinogenesis.