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Updated: Feb 12, 2026
Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation
Published on: April 29, 2015
[Differential expression and correlation to cytokine expressions of FFAR4 in peritoneal and alveolar macrophages]
Yingguang Liu1, Yanyan Zhao2, Lanlan Wei2
1Department of Human Anatomy and Histoembryology, Zunyi Medical University, Zhuhai 519000; Institute of Basic Medical Sciences, Xi'an Medical University, Xi'an 710021, China.
Abstract:
Objective To investigate the expression level of free fatty acid receptor 4 (FFAR4) and its correlation with cytokine expressions in peritoneal macrophages and alveolar macrophages. Methods Peritoneal macrophages and alveolar macrophages were purified and collected using flow cytometry from adult BALB/c mice. Real-time quantitative PCR was used to measure mRNA expression levels. The correlation between FFAR4 expression level and cytokine expression levels was analyzed using linear regression. Results The expression levels of FFAR4, interleukin-1 (IL-1) and tumor necrosis factor-alpha (TNF-α) were significantly higher in the alveolar macrophages than in the peritoneal macrophages. In contrast, the expression levels of IL-10 and IL-6 were significantly lower in the alveolar macrophages than in the peritoneal macrophages. In the peritoneal macrophages, FFAR4 expression was positively correlated to the mRNA expressions of IL-10, IL-6 and TNF-α, but negatively correlated to IL-1 mRNA expression. In the alveolar macrophages, FFAR4 expression was positively correlated to the mRNA expressions of IL-1, IL-6 and TNF-α, but negatively correlated to IL-10 mRNA expression. Conclusion FFAR4 is differentially expressed and correlated to cytokine expressions in peritoneal macrophages and alveolar macrophages from BALB/c mice.
Insights
Free fatty acid receptor 4 (FFAR4) shows different expression and correlation with cytokines in mouse peritoneal and alveolar macrophages. This finding impacts understanding immune cell responses in different tissues.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Macrophages, key immune cells, exist in various tissue-specific forms, such as peritoneal and alveolar macrophages.
- These macrophages exhibit distinct phenotypes and functions, influencing local immune responses.
- Free fatty acid receptor 4 (FFAR4) is implicated in inflammatory processes, but its role in different macrophage populations is not fully understood.
Purpose of the Study:
- To investigate the differential expression of free fatty acid receptor 4 (FFAR4) in peritoneal versus alveolar macrophages.
- To analyze the correlation between FFAR4 expression and the mRNA levels of key cytokines (IL-1, IL-6, IL-10, TNF-α) in these macrophage populations.
Main Methods:
- Isolation and purification of peritoneal and alveolar macrophages from adult BALB/c mice using flow cytometry.
- Quantification of FFAR4 and cytokine mRNA expression levels via real-time quantitative PCR.
- Statistical analysis of FFAR4 expression correlations with cytokine mRNA using linear regression.
Main Results:
- Alveolar macrophages exhibited significantly higher FFAR4, IL-1, and TNF-α mRNA levels compared to peritoneal macrophages.
- Conversely, IL-10 and IL-6 mRNA levels were significantly lower in alveolar macrophages than in peritoneal macrophages.
- FFAR4 expression showed distinct positive and negative correlations with specific cytokines in each macrophage type, indicating differential regulatory roles.
Conclusions:
- FFAR4 displays differential expression patterns between peritoneal and alveolar macrophages in mice.
- The correlation of FFAR4 with cytokine expression varies significantly between these two macrophage populations.
- These findings highlight tissue-specific roles of FFAR4 in modulating macrophage inflammatory responses.
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