Digestive Diseases and Sciences

, Volume 53, Issue 6, pp 1707–1715 | Cite as

The Effect of PPARα and PPARγ Ligands on Inflammation and ABCA1 Expression in Cultured Gallbladder Epithelial Cells

  • Jin Lee
  • Eun Mi Hong
  • Hyun Woo Byun
  • Min Ho Choi
  • Hyun Joo Jang
  • Chang Soo Eun
  • Sea Hyub Kae
  • Ho Soon Choi
Original Paper


The preservation of gallbladder function by control of inflammation and elimination of cholesterol accumulation in gallbladder epithelial cells (GBEC) could contribute to the prevention of gallstone formation and cholecystitis. Peroxisome proliferator-activated receptors (PPARs) modulate inflammation and lipid metabolism in various cells and GBEC efflux of excessive amounts of absorbed cholesterol through the ATP-binding cassette transporter A1 (ABCA1)-mediated pathway. The aim of this study was to determine whether ligands of PPARα and PPARγ modulate inflammation and have an effect on ABCA1 expression in GBEC. Canine GBEC were cultured on dishes coated with collagen matrix. We performed Western blot analysis for the expression of specific protein and/or RT-PCR for the expression of specific mRNA. PPARα and PPARγ expression was observed and increased in GBEC treated with WY-14643 (PPARα ligand), troglitazone (PPARγ ligand), and lipopolysaccharide (LPS) compared to the no-treatment control and PPARα antagonist (GW-9662) treatment group. WY-14643, troglitazone, and LPS also induced an increase in the expression of ABCA1 protein and mRNA in cultured GBEC. LPS-induced TNFα mRNA expression was suppressed by pre-treatment with WY-14643 and troglitazone preceding LPS treatment in GBEC. PPAR ligands, especially PPARγ, may preserve gallbladder function by suppression of inflammatory reaction and prevention of cholesterol accumulation in GBEC, contributing to the prevention of gallstone formation and progression to cholecystitis.


Gallbladder Gallstone Peroxisome proliferator-activated receptor (PPAR) ATP-binding cassette transporter A1 (ABCA1) 



This study was supported by the 2006 Clinical Research Fund of Hallym Medical Center, Seoul. Korea. We thank Rahul Kuver and Sum P. Lee (Division of Gastroenterology, University of Washington School of Medicine, Seattle, USA) for the kind gift of the GBEC.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Jin Lee
    • 1
  • Eun Mi Hong
    • 1
  • Hyun Woo Byun
    • 1
  • Min Ho Choi
    • 1
  • Hyun Joo Jang
    • 1
  • Chang Soo Eun
    • 1
  • Sea Hyub Kae
    • 1
  • Ho Soon Choi
    • 2
  1. 1.Division of Gastroenterology, Department of Internal MedicineHallym University Hangang Sacred Heart HospitalSeoulSouth Korea
  2. 2.Division of Gastroenterology, Department of Internal MedicineHanyang University College of MedicineSeoulSouth Korea

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