Jiazheng Li1, Nobuhisa Kandatsu1, Guo-Gang Feng2, Jia-Zhen Jiang1, Lei Huang3, Hiroyuki Kinoshita1, Shoshiro Okada4, Yoshihiro Fujiwara1. 1. Department of Anesthesiology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan. 2. Department of Pharmacology, Aichi Medical University School of Medicine, 1-1 Karimata Yazako, Nagakute, Aichi, 480-1195, Japan. fenggg@aichi-med-u.ac.jp. 3. Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, China. 4. Department of Pharmacology, Aichi Medical University School of Medicine, 1-1 Karimata Yazako, Nagakute, Aichi, 480-1195, Japan.
Abstract
PURPOSE: The present study, conducted in rats, investigated whether propofol attenuates lipopolysaccharide (LPS)-triggered liver dysfunction via regulation of tumor necrosis factor (TNF)-α production in activated Kupffer cells. METHODS: Rats received LPS (500 μg/kg) under Urethane™ sedation (1 g/kg) in combination with propofol (5 mg/kg/h) or Intralipid™ from 1 h before to 6 h after LPS administration. Some rats were treated with 10 mg/kg gadolinium chloride (GdCl3) to induce Kupffer cell depletion. The serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST), TNF-α mRNA and protein expression, caspase-3 activation and apoptosis were evaluated in hepatocytes. Immunofluorescence staining revealed expression of the pan-macrophage marker CD68 as well as TNF-α in Kupffer cells. RESULTS: ALT and AST serum levels increased approximately four-fold in LPS-exposed rats compared with Intralipid™-treated rats at 6 h after LPS administration, whereas propofol and GdCl3 reduced the LPS-induced increases. LPS simultaneously augmented TNF-α expression in Kupffer cells, followed by increased caspase-3 activity and apoptosis in hepatocytes. Immunofluorescence staining and immunoblotting assay showed that TNF-α expression in Kupffer cells was inhibited by propofol and GdCl3, resulting in a reduction of caspase-3 activity and apoptosis in LPS-treated rat hepatocytes. CONCLUSIONS: Propofol (5 mg/kg/h) attenuated LPS-triggered liver dysfunction via inhibition of TNF-α production in activated Kupffer cells. These results suggest that propofol is capable of inhibiting inflammation-induced liver dysfunction in vivo.
PURPOSE: The present study, conducted in rats, investigated whether propofol attenuates lipopolysaccharide (LPS)-triggered liver dysfunction via regulation of tumor necrosis factor (TNF)-α production in activated Kupffer cells. METHODS:Rats received LPS (500 μg/kg) under Urethane™ sedation (1 g/kg) in combination with propofol (5 mg/kg/h) or Intralipid™ from 1 h before to 6 h after LPS administration. Some rats were treated with 10 mg/kg gadolinium chloride (GdCl3) to induce Kupffer cell depletion. The serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST), TNF-α mRNA and protein expression, caspase-3 activation and apoptosis were evaluated in hepatocytes. Immunofluorescence staining revealed expression of the pan-macrophage marker CD68 as well as TNF-α in Kupffer cells. RESULTS: ALT and AST serum levels increased approximately four-fold in LPS-exposed rats compared with Intralipid™-treated rats at 6 h after LPS administration, whereas propofol and GdCl3 reduced the LPS-induced increases. LPS simultaneously augmented TNF-α expression in Kupffer cells, followed by increased caspase-3 activity and apoptosis in hepatocytes. Immunofluorescence staining and immunoblotting assay showed that TNF-α expression in Kupffer cells was inhibited by propofol and GdCl3, resulting in a reduction of caspase-3 activity and apoptosis in LPS-treated rat hepatocytes. CONCLUSIONS:Propofol (5 mg/kg/h) attenuated LPS-triggered liver dysfunction via inhibition of TNF-α production in activated Kupffer cells. These results suggest that propofol is capable of inhibiting inflammation-induced liver dysfunction in vivo.
Authors: E Hamada; T Nishida; Y Uchiyama; J Nakamura; K Isahara; H Kazuo; T P Huang; T Momoi; T Ito; H Matsuda Journal: J Hepatol Date: 1999-05 Impact factor: 25.083
Authors: Yong-Han Paik; Robert F Schwabe; Ramón Bataller; Maria P Russo; Christian Jobin; David A Brenner Journal: Hepatology Date: 2003-05 Impact factor: 17.425