Faculty Collaboration Database

Pre-Hepatectomy Assessment of Bile Transporter Expression by Gadoxetic Acid-Enhanced MRI in a Rat Model of Liver Cirrhosis. J Invest Surg 2017 Aug;30(4):265-271

Date

10/27/2016

Pubmed ID

27780379

DOI

10.1080/08941939.2016.1238983

Scopus ID

2-s2.0-84992332954 (requires institutional sign-in at Scopus site)   3 Citations

Abstract

BACKGROUND: Gadoxetic acid is a liver-specific intravenous T1 magnetic resonance (MR) contrast agent that is excreted via the hepatobiliary system. We hypothesize that hepatocyte expressions of bile transporters (OATP1 and MRP2) correlate with dynamic profile of Gadoxetic acid enhanced (GE)-MR imaging (MRI).

METHODS: Two groups of rats, control (n = 6) and cirrhosis (n = 12), received gadoxetic acid enhanced MRI followed by 70% hepatectomy. The change in MR signal intensity from the baseline before the contrast injection (ΔSI) was analyzed every minute for 30 min. Dynamic signal intensity retention ratio (DSR) was defined as the mean ΔSI of the third 10-minmin period divided by the first 10-minmin period. Real-time PCR was utilized to quantify mRNA expressions.

RESULTS: Compared to the control, cirrhosis group demonstrated lower mRNA levels of OATP1 (0.038 ± 0.020 vs. 0.232 ± 0.0979; p = 0.004), MRP2 (0.201 ± 0.084 vs. 0.7567 ± 0.254; p = 0.002), and OATP1/MRP2 mRNA ratio (0.193 ± 0.065 vs. 0.342 ± 0.206; p = 0.032). DSR was higher in the cirrhosis group (0.678 ± 0.554 vs -0.125 ± 0.839; p = 0.033). In the cirrhosis group, there was an inverse correlation between the ratios of OATP1/MRP2 mRNA and DSR (R = -0.709, p = 0.01).

CONCLUSION: Bile transporters OATP1/MRP2 mRNA expression ratio in rat liver tissue decreased with DMN-induced liver injury. The expressions of bile transporters correlated with GE-MRI DSR. The GE-MRI DSR has potential utility in qualifying OATP1/MRP2 mRNA expression.

Author List

Kim J, Kim T, Hong KS, Moon H, Oh IK, Lee SM, Hohenwalter MD, Zimmerman MA, Cronin DC, Hong JC

Authors

Mark D. Hohenwalter MD Associate Dean, Executive Director, Professor in the Radiology department at Medical College of Wisconsin
Joohyun Kim MD, PhD Associate Professor in the Surgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

ATP-Binding Cassette Transporters
Animals
Gadolinium DTPA
Hepatectomy
Liver Cirrhosis, Experimental
Magnetic Resonance Imaging
Male
Organic Anion Transporters, Sodium-Independent
Rats, Sprague-Dawley