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International Journal of Hepatology
Volume 2012 (2012), Article ID 476820, 10 pages
http://dx.doi.org/10.1155/2012/476820
Research Article

A Crucial Role of Bone Morphogenetic Protein Signaling in the Wound Healing Response in Acute Liver Injury Induced by Carbon Tetrachloride

1Department of Molecular Biology, School of Life Sciences, Faculty of Medicine, Tottori University, Nishi-cho, Yonago 683-8503, Japan
2Tottori University Chromosome Engineering Research Center, Nishi-cho, Yonago 683-8503, Japan

Received 30 December 2011; Revised 14 March 2012; Accepted 12 April 2012

Academic Editor: Umberto Cillo

Copyright © 2012 Nao Oumi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Acute liver injury induced by administration of carbon tetrachloride (CCl4) has used a model of wound repair in the rat liver. Previously, we reported transient expression of bone morphogenetic protein (Bmp) 2 or Bmp4 at 6–24 h after CCl4 treatment, suggesting a role of BMP signaling in the wound healing response in the injured liver. In the present study, we investigated the biological meaning of the transient Bmp expression in liver injury. Methods. Using conditional knockout mice carrying a floxed exon in the BMP receptor 1A gene, we determined the hepatic gene expressions and proliferative activity following CCl4-treated liver. Results. We observed retardation of the healing response in the knockout mice treated with CCl4, including aggravated histological feature and reduced expressions of the albumin and Tdo2 genes, and a particular decrease in the proliferative activity shown by Ki-67 immunohistochemistry. Conclusion. Our findings suggest a crucial role of BMP signaling in the amelioration of acute liver injury.