Overexpression of Tumor Necrosis Factor-Like Ligand 1 A in Myeloid Cells Aggravates Liver Fibrosis in Mice.

Abstract

Macrophages are the master regulator of the dynamic fibrogenesis-fibrosis resolution paradigm. TNF-like ligand 1 aberrance (TL1A) was found to be able to induce intestinal inflammation and fibrosis. Furthermore, significantly increased TL1A had been detected in liver tissues and mononuclear cells of patients with primary biliary cirrhosis (PBC). This study was to investigate the effect of myeloid cells with constitutive TL1A expression on liver fibrogenesis. We found that TL1A expressions in liver tissues and macrophages were significantly increased in mice with liver fibrosis induced by injection of carbon tetrachloride (CCl4). TL1A overexpression in myeloid cells induced liver function injury, accelerated the necrosis and apoptosis of hepatocytes, recruited macrophages, and promoted activation of hepatic stellate cells (HSCs) and fibrosis. In vitro results of our study showed that TL1A overexpression in macrophages promoted secretion of platelet-derived growth factor-BB (PDGF-BB), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β). Culturing macrophages with TL1A overexpression could accelerate the activation and proliferation of primary HSCs. These results indicated that constitutive TL1A expression in myeloid cells exacerbated liver fibrosis, probably through macrophage recruitment and secretion of proinflammatory and profibrotic cytokines.

• Authors: Jinbo Guo, Yuxin Luo, Fengrong Yin, Xiaoxia Huo, Guochao Niu, Mei Song, Shuang Chen, Xiaolan Zhang
• Journal: Journal of immunology research (J Immunol Res) Vol. 2019 Pg. 7657294 ( 2019) ISSN: 2314-7156 [Electronic] Egypt
• PMID: 30906791 (Publication Type: Journal Article)

Chemical References

• Interleukin-1beta
• Tnfsf15 protein, mouse
• Tumor Necrosis Factor Ligand Superfamily Member 15
• Tumor Necrosis Factor-alpha
• Becaplermin
• Carbon Tetrachloride

Topics

• Animals
• Apoptosis
• Becaplermin (metabolism)
• Carbon Tetrachloride (toxicity)
• Cells, Cultured
• Disease Models, Animal
• Fibrosis
• Hepatocytes (physiology)
• Humans
• Inflammation (metabolism)
• Interleukin-1beta (metabolism)
• Liver (pathology)
• Liver Cirrhosis, Biliary (metabolism)
• Macrophages (immunology)
• Mice
• Mice, Inbred C57BL
• Myeloid Cells (physiology)
• Necrosis
• Tumor Necrosis Factor Ligand Superfamily Member 15 (genetics, metabolism)
• Tumor Necrosis Factor-alpha (metabolism)