Related Experiment Videos
Hepatic expression of hepatocyte-growth-factor-like/macrophage-stimulating protein mRNA in fulminant hepatic failure
P Harrison1, S J Degen, R Williams
1Department of Molecular Medicine, King's College School of Medicine and Dentistry, London, UK.
Abstract:
We investigated whether impaired Kupffer cell phagocytosis in fulminant hepatic failure could be due to reduced synthesis of hepatocyte-growth-factor-like/macrophage-stimulating protein (HGFL/MSP), a serum protein synthesised predominantly in hepatocytes and required by tissue macrophages for phagocytosis. Hepatic expression of the 3.0 kb HGFL/MSP mRNA, assessed by northern hybridisation, was lower in nine patients with fulminant hepatic failure undergoing liver transplantation than in three liver grafts as controls (median absorbance units 97 [range 15-1200] versus 1114 [1100-1120], respectively; p < 0.05). Decreased hepatic HGFL/MSP production might cause impaired Kupffer cell phagocytosis in fulminant hepatic failure.
Insights
Fulminant hepatic failure may impair Kupffer cell phagocytosis due to reduced synthesis of hepatocyte growth factor-like/macrophage-stimulating protein (HGFL/MSP). Lower hepatic HGFL/MSP mRNA expression was observed in patients with this condition.
Area of Science:
- Hepatology
- Immunology
- Molecular Biology
Background:
- Kupffer cell phagocytosis is crucial for liver function.
- Fulminant hepatic failure (FHF) is associated with impaired Kupffer cell activity.
- Hepatocyte growth factor-like/macrophage-stimulating protein (HGFL/MSP) is essential for macrophage phagocytosis.
Purpose of the Study:
- To investigate if reduced HGFL/MSP synthesis contributes to impaired Kupffer cell phagocytosis in FHF.
- To assess hepatic HGFL/MSP mRNA expression in patients with FHF.
Main Methods:
- Northern hybridization was used to measure hepatic HGFL/MSP mRNA levels.
- Gene expression was compared between nine FHF patients undergoing liver transplantation and three liver grafts (controls).
Main Results:
- Hepatic expression of HGFL/MSP mRNA was significantly lower in FHF patients compared to controls (median absorbance units 97 vs. 1114, p < 0.05).
- This indicates reduced synthesis of HGFL/MSP in the livers of FHF patients.
Conclusions:
- Decreased hepatic HGFL/MSP production is a potential cause of impaired Kupffer cell phagocytosis in FHF.
- Restoring HGFL/MSP levels may be a therapeutic target for FHF.