Hepatology communications · 2025
Interleukin-18 binding protein protects against metabolic steatohepatitis.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Somm Emmanuel, Jo Yunju, Perroud Elodie, Ino Frédérique, Lindner Karina, Kang Baeki E, Veyrat-Durebex Christelle, Bontems Franck, Visentin Florian, Fauteux-Daniel Sébastien, Förster Irmgard, Gavin Anne-Claude, Pagano Sabrina, Vuilleumier Nicolas, Ryu Dongryeol, Gariani Karim, Gabay Cem, Jornayvaz François R
Аннотация
BACKGROUND: Metabolic dysfunction-associated steatohepatitis (MASH) is a frequent consequence of Western diet consumption and liver steatosis. IL-18 binding protein (IL-18BP) limits the action of interleukin-18 (IL-18). Our work aims to study the unknown role of IL-18BP in MASH progression.
METHODS: We analyzed the liver transcriptome from MASH patients. We investigated cell-specific expressions of IL-18, IL-18BP, and IL-18 receptor in human and mouse liver. We studied the liver phenotype of Il18bp-/- mice on a high-fat/high-cholesterol (HFHC) diet. We administered an anti-IL-18 antibody in Il18bp-/- mice and in diet-induced wild-type (WT) MASH mice. We generated and studied double knock-out Il18bp-/-Ifng-/- mice.
RESULTS: IL-18BP expression is increased in the liver of patients and mouse models with MASH and positively correlates with fibrosis stages. On the HFHC diet, Il18bp-/- mice exhibit increased hepatic damage, inflammation, and fibrosis compared with WT mice. Treatment with anti-IL-18 antibody corrects liver defects in Il18bp-/- mice and ameliorates inflammation and fibrosis in diet-induced MASH mice, suggesting a translational treatment opportunity. Genetic deficiency in IFN-γ abrogates inflammation but not fibrosis in Il18bp-/- mice.
CONCLUSIONS: IL-18BP has a role in limiting the progression of MASH, notably by reducing inflammation and fibrosis. Downstream IL-18 over-signaling, IFN-γ, mediates inflammation, but not fibrosis. Increasing IL-18BP levels represents a novel therapeutic perspective for patients affected by MASH.
METHODS: We analyzed the liver transcriptome from MASH patients. We investigated cell-specific expressions of IL-18, IL-18BP, and IL-18 receptor in human and mouse liver. We studied the liver phenotype of Il18bp-/- mice on a high-fat/high-cholesterol (HFHC) diet. We administered an anti-IL-18 antibody in Il18bp-/- mice and in diet-induced wild-type (WT) MASH mice. We generated and studied double knock-out Il18bp-/-Ifng-/- mice.
RESULTS: IL-18BP expression is increased in the liver of patients and mouse models with MASH and positively correlates with fibrosis stages. On the HFHC diet, Il18bp-/- mice exhibit increased hepatic damage, inflammation, and fibrosis compared with WT mice. Treatment with anti-IL-18 antibody corrects liver defects in Il18bp-/- mice and ameliorates inflammation and fibrosis in diet-induced MASH mice, suggesting a translational treatment opportunity. Genetic deficiency in IFN-γ abrogates inflammation but not fibrosis in Il18bp-/- mice.
CONCLUSIONS: IL-18BP has a role in limiting the progression of MASH, notably by reducing inflammation and fibrosis. Downstream IL-18 over-signaling, IFN-γ, mediates inflammation, but not fibrosis. Increasing IL-18BP levels represents a novel therapeutic perspective for patients affected by MASH.