TY - JOUR
T1 - Transcriptional reprogramming in murine liver defines the physiologic consequences of biliary obstruction
AU - Campbell, Kathleen M.
AU - Sabla, Gregg E.
AU - Bezerra, Jorge A.
N1 - Funding Information:
The authors thank Bruce Aronow for tutorial in use of gene expression software and preliminary analysis of gene expression profiles, and Drs Dong-Yi Zhang and Pranavkumar Shivakumar for technical assistance and support for real-time PCR. We also thank Drs William F. Balistreri, John C. Bucuvalas, and James E. Heubi for insightful review of the manuscript. This work was supported in part by the NIH- R01-DK064008 grant and the Translational Research Initiative of Cincinnati Children's Hospital Medical Center.
PY - 2004/1
Y1 - 2004/1
N2 - Background/Aims: While the metabolic and histological responses to cholestasis are recognized, the consequences of impaired biliary flow on liver gene expression are largely undefined. We hypothesized that biliary obstruction results in transcriptional reprogramming that dictates the physiologic response. Methods: We determined global gene expression in murine livers 1-21 days following bile duct ligation. Total hepatic cRNA from experimental and sham mice was hybridized to Affymetrix gene chips. Gene expression data was analyzed by GeneSpring® software and validated by Northern analysis. Results: We found 92 genes over-expressed ≥2-fold at one or more time points following bile duct ligation. Functional classification of these genes revealed the activation of three main biological processes in a sequential and time-restricted fashion. At day 1, genes involved in sterol metabolism were uniquely over-expressed, including HMG-CoA reductase, the rate-limiting enzyme of cholesterol biosynthesis. This was followed by an increased expression of growth-promoting genes at day 7, the time point coinciding with peak cholangiocyte proliferation. In later phases (days 14-21), the liver over-expressed genes encoding structural proteins and proteases. Conclusions: Transcriptional reprogramming in the liver following biliary obstruction favors the activation of genes regulating metabolism, cell proliferation, and matrix remodeling in a time-restricted and sequential fashion.
AB - Background/Aims: While the metabolic and histological responses to cholestasis are recognized, the consequences of impaired biliary flow on liver gene expression are largely undefined. We hypothesized that biliary obstruction results in transcriptional reprogramming that dictates the physiologic response. Methods: We determined global gene expression in murine livers 1-21 days following bile duct ligation. Total hepatic cRNA from experimental and sham mice was hybridized to Affymetrix gene chips. Gene expression data was analyzed by GeneSpring® software and validated by Northern analysis. Results: We found 92 genes over-expressed ≥2-fold at one or more time points following bile duct ligation. Functional classification of these genes revealed the activation of three main biological processes in a sequential and time-restricted fashion. At day 1, genes involved in sterol metabolism were uniquely over-expressed, including HMG-CoA reductase, the rate-limiting enzyme of cholesterol biosynthesis. This was followed by an increased expression of growth-promoting genes at day 7, the time point coinciding with peak cholangiocyte proliferation. In later phases (days 14-21), the liver over-expressed genes encoding structural proteins and proteases. Conclusions: Transcriptional reprogramming in the liver following biliary obstruction favors the activation of genes regulating metabolism, cell proliferation, and matrix remodeling in a time-restricted and sequential fashion.
KW - Bile duct ligation
KW - Cholangiocyte proliferation
KW - Cholestasis
KW - Cholesterol metabolism
KW - Microarray
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U2 - 10.1016/j.jhep.2003.09.025
DO - 10.1016/j.jhep.2003.09.025
M3 - Article
C2 - 14672609
AN - SCOPUS:0346059346
SN - 0168-8278
VL - 40
SP - 14
EP - 23
JO - Journal of Hepatology
JF - Journal of Hepatology
IS - 1
ER -