A System for In Vivo Imaging of Hepatic Free Fatty Acid Uptake

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• 作者：Hyo Min Park¹ ; Kim A. Russo² ; Grigory Karateev³ ; Michael Park¹ ; Elena Dubikovskaya³ ; Lance J. Kriegsfeld² ; Andreas Stahl¹ ; ^{astahl@berkeley.edu}
• 关键词：Mouse Model ; Visualization ; Metabolism ; Lipid
• 刊名：Gastroenterology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：152
• 期：1
• 页码：78-81.e2
• 全文大小：1035 K
• 卷排序：152

文摘

Alterations in hepatic free fatty acid (FFA) uptake and metabolism contribute to the development of prevalent liver disorders such as hepatosteatosis. However, detecting dynamic changes in FFA uptake by the liver in live model organisms has proven difficult. To enable noninvasive real-time imaging of FFA flux in the liver, we generated transgenic mice with liver-specific expression of luciferase and performed bioluminescence imaging with an FFA probe. Our approach enabled us to observe the changes in FFA hepatic uptake under different physiological conditions in live animals. By using this method, we detected a decrease in FFA accumulation in the liver after mice were given injections of deoxycholic acid and an increase after they were fed fenofibrate. In addition, we observed diurnal regulation of FFA hepatic uptake in living mice. Our imaging system appears to be a useful and reliable tool for studying the dynamic changes in hepatic FFA flux in models of liver disease.