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Osteopontin Deficiency Alters Biliary Homeostasis and Protects against Gallstone Formation
Jing Lin1, Ming Lu1, Wei-Qing Shao1
1Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, 200040, China.
Scientific Reports
|August 4, 2016
Summary
Osteopontin (OPN) in the liver promotes cholesterol gallstone formation by disrupting biliary metabolism. Reducing hepatic OPN may offer a new therapeutic strategy for preventing gallstones.
Area of Science:
- Hepatology
- Biliary Physiology
- Molecular Biology
Background:
- Cholesterol gallstone formation results from impaired biliary cholesterol homeostasis.
- Osteopontin (OPN) levels are altered in gallstone patients, but its hepatic role is unclear.
Purpose of the Study:
- To investigate the role and mechanism of hepatic osteopontin (OPN) in cholesterol gallstone formation.
- To explore OPN as a potential therapeutic target for gallstones.
Main Methods:
- Comparative analysis of hepatic OPN expression in gallstone patients and controls.
- Assessment of gallstone formation in OPN-deficient mice versus wild-type mice.
- Examination of hepatic gene expression related to cholesterol and bile acid metabolism.
Main Results:
- Hepatic OPN expression is elevated in gallstone patients.
- OPN-deficient mice exhibit reduced susceptibility to gallstone formation.
- OPN deficiency alters bile composition, increasing CYP7A1 and decreasing SHP, ATP8B1, SR-B1, and SREBP-2 expression.
Conclusions:
- Hepatic osteopontin (OPN) promotes cholesterol gallstone formation by modulating hepatic genes involved in biliary metabolism.
- OPN represents a potential therapeutic target for cholesterol gallstone disease.
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