Resolvin D1-mediated cellular crosstalk protects against MASH

Area of Science:

• Hepatology
• Immunology
• Molecular Biology

Background:

• Metabolic dysfunction-associated steatohepatitis (MASH) presents a significant global health challenge with limited therapeutic options.
• Resolvin D1 (RvD1), a specialized pro-resolving mediator derived from docosahexaenoic acid, shows promise in treating chronic liver diseases, but its mechanisms remain unclear.

Purpose of the Study:

• To investigate the role and mechanism of RvD1-mediated cellular crosstalk in the context of MASH.
• To elucidate how RvD1 influences interactions between hepatocytes and non-parenchymal cells in MASH.

Main Methods:

• Administered RvD1 to mice with experimental MASH and performed bulk and single-cell RNA sequencing.
• Isolated primary liver cells (hepatocytes, Kupffer cells, T cells, hepatic stellate cells) for co-culture experiments.
• Assessed the impact of RvD1 on cell death, inflammation, and fibrosis markers.

Main Results:

• Hepatic RvD1 levels were decreased in both murine and human MASH.
• RvD1 administration attenuated hepatocellular death, inflammation, and liver fibrosis in MASH models.
• RvD1 suppressed endoplasmic reticulum stress-induced hepatocyte death and reduced the activation of Kupffer cells, T cells, and hepatic stellate cells.

Conclusions:

• RvD1 mitigates MASH progression by reducing hepatocyte death and DAMP production via alleviating ER stress-mediated apoptosis.
• RvD1’s action on cellular crosstalk between hepatocytes and non-parenchymal cells offers a novel therapeutic strategy for MASH.
• This study provides mechanistic insights into RvD1's protective effects in MASH, highlighting its therapeutic potential.