This research was supported by the grants provided by Ministry of Education, Science and Culture, Japan.
Induction of Transferrin Receptor by Ethanol in Rat Primary Hepatocyte Culture
Version of Record online: 11 APR 2006
Alcoholism: Clinical and Experimental Research
Volume 28, Issue Supplement s2, pages 98S–105S, August 2004
How to Cite
Suzuki, M., Fujimoto, Y., Suzuki, Y., Hosoki, Y., Saito, H., Nakayama, K., Ohtake, T. and Kohgo, Y. (2004), Induction of Transferrin Receptor by Ethanol in Rat Primary Hepatocyte Culture. Alcoholism: Clinical and Experimental Research, 28: 98S–105S. doi: 10.1111/j.1530-0277.2004.tb03225.x
- Issue online: 11 APR 2006
- Version of Record online: 11 APR 2006
- Transferrin Receptor;
Background: It is not uncommon for alcoholics to have iron accumulation in the liver, a condition that may contribute to the development of alcoholic liver disease. Recently, we reported that the expression of transferrin receptor, which mediates cellular iron uptake, was increased in hepatocytes in patients with alcoholic liver disease. To elucidate the mechanism of the iron accumulation in hepatocytes in such disease, we examined whether ethanol exposure induced the transferrin receptor expression and increased the cellular iron uptake.
Methods: Rat primary hepatocytes were isolated and cultured in the presence of 20 μmol/liter of iron and 25 mmol/liter of ethanol.
Results: Ethanol exposure to the hepatocytes demonstrated an ˜2-fold increase in transferrin receptor expression for 24 hr, shown by Western blot analysis and 35S-methionine metabolic labeling, 19% increase in 59Fe-transferrin uptake by hepatocytes, and 20% increase in activity of iron regulatory protein examined by band shift assay.
Conclusion: Ethanol exposure induced the transferrin receptor expression, partially through the activation of iron regulatory protein, and increased the transferrin-bound iron uptake in rat hepatocyte cultures. The induction of transferrin receptor by ethanol might be one of the mechanisms of iron accumulation in the hepatocytes in alcoholic liver disease.