Identification, Purification and Characterization of Mast Cells in Murine Liver Fibrosis: Novel Methods, Expression Signatures and Correlation with Disease Severity

Christian Penners; Julia Otto; Steffen K. Meurer; Ralf Weiskirchen; Michael Huber; Christian Liedtke

doi:10.1101/2025.07.25.666577

July 28, 2025Open Access

Identification, Purification and Characterization of Mast Cells in Murine Liver Fibrosis: Novel Methods, Expression Signatures and Correlation with Disease Severity

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Key Points

Mast cells were identified and characterized in murine models of liver fibrosis, showing a significant correlation with fibrosis severity.
Detection of mast cells involved using FACS to isolate them and qPCR analysis to verify their signature.
Both toxic and genetic models (DEN/CCl4 treatment and Mdr2-/- mice) were utilized to assess mast cell frequency and localization in fibrotic liver.
Findings advance the understanding of mast cell biology and their role in liver diseases, potentially aiding future research.
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simple_explanation":"Mast cells are special immune cells that help the body fight off infections and inflammation. This research found these cells in mouse models with liver damage. The study showed that the number of mast cells is linked to how bad the liver damage is. Understanding these cells better can help scientists find new ways to treat liver diseases in the future. 🦠"} } } } } } } } } } } } } } } }} } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } }} } } } } } model.map } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } }} } } } } }}
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Implication

This research identifies correlations between mast cell expression and liver fibrosis severity in murine models, suggesting potential implications for understanding liver disease.

Abstract

Mast cells (MCs) are myeloid cells of the innate immune system. As a first line of defence they fulfill effector functions and immune modulatory properties. Upon activation they release pro-inflammatory mediators such as cytokines and proteases. It has been suggested that MCs may contribute to the development of liver fibrosis. However, investigating hepatic MC biology in mice is challenging due to low MC numbers and a lack of suitable detection techniques relying on MC proteins and their modifications. Here, we evaluated whether the expression strength of MC markers correlates with the degree of liver fibrosis in mice and aimed to determine the frequency and localization of hepatic MCs. We applied both a toxic (DEN/CCl4 treatment) and a genetic (Mdr2-/- mice) liver fibrosis model in C57BL/6 mice and found a significant correlation between fibrosis grade and the expression of several established mast cell markers. This correlation was further supported in patients with fibrosis and hepatocellular carcinoma (HCC) using publicly available transcriptomics datasets. We used FACS to purify and isolate MCs from fibrotic mouse livers and verified MC signatures by qPCR analysis of MC-specific gene expression. Hepatic MCs were predominantly negative for Mast-Cell-Protease 5 (Mcpt5) and occurred at a low frequency (approximately 1-2% of leukocytes). Using Molecular CartographyTM of fibrotic liver sections, we determined the spatial localization, expression signature, abundance (approximately 2 cells/mm2) and cellular environment of murine hepatic MCs. In summary, we demonstrated the existence of MCs in murine fibrotic livers and defined an MC expression signature that correlates with the strength of liver fibrosis. These findings will help to study MC biology in murine models of liver disease more effectively in the future.

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Cite This Study

Penners et al. (2025) studied this question.

synapsesocial.com/papers/689a093fe6551bb0af8ceb19 https://doi.org/10.1101/2025.07.25.666577

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Identification, Purification and Characterization of Mast Cells in Murine Liver Fibrosis: Novel Methods, Expression Signatures and Correlation with Disease Severity

Key Points

Implication

Abstract

Discussion

Cite This Study

Identification, Purification and Characterization of Mast Cells in Murine Liver Fibrosis: Novel Methods, Expression Signatures and Correlation with Disease Severity

Key Points

Implication

Abstract

Discussion

Cite This Study

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