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Updated: Aug 6, 2026
Phenotypic Characterization of Macrophages from Rat Kidney by Flow Cytometry
Published on: October 18, 2016
Changes in the pro-inflammatory cytokine production and peritoneal macrophage function in rats with chronic heart
M L Batista1, R V T Santos, L M Cunha
1Molecular Biology of the Cell Group, Institute of Biomedical Sciences, University of São Paulo, Brazil. migueljr@iusp.br
Abstract:
Chronic heart failure (CHF) is a state of immune activation, and pro-inflammatory cytokines play an important role in its development and progression. Macrophages (Mphis), when activated, are the main source of pro-inflammatory cytokines. We measured interleukin-6 (IL-6), interleukin (IL-1beta) and tumor necrosis factor - alpha (TNF-alpha) production after lipopolysaccharide (LPS)-stimulation, as well as peritoneal Mphis migration, phagocytic capacity, chemotaxis index, and hydrogen peroxide production, in an attempt to clarify the role of this cell in an animal model of CHF. Ligature of the left coronary artery or sham operation was performed in adult Wistar rats. After 12 weeks, resident and total cell number, phagocytic capacity, chemotaxis index, and hydrogen peroxide production in Mphis were significantly higher in CHF than in control rats. The production of IL-6 and TNF- alpha was similarly significantly enhanced in CHF as compared with controls. Mphis obtained from CHF rats were more responsive to LPS, suggesting the existence, in vivo, of possible factor(s) modulating the production of pro-inflammatory cytokines. The results demonstrated that there is modification of peritoneal Mphis function along CHF development, possibly contributing to the pathophysiological process in the establishment of CHF.
Insights
Chronic heart failure (CHF) involves immune activation, with macrophages (Mphis) driving inflammation. This study found altered Mphis function in a rat CHF model, contributing to disease progression.
Area of Science:
- Immunology
- Cardiology
- Pathophysiology
Background:
- Chronic heart failure (CHF) is characterized by immune system activation.
- Pro-inflammatory cytokines are key drivers in CHF development and progression.
- Activated macrophages (Mphis) are primary sources of these pro-inflammatory cytokines.
Purpose of the Study:
- To investigate the role of macrophages in an animal model of chronic heart failure (CHF).
- To assess peritoneal Mphis function, including cytokine production, migration, and phagocytosis, in CHF.
- To understand how Mphis contribute to the pathophysiology of CHF.
Main Methods:
- An animal model of CHF was established in Wistar rats via left coronary artery ligation.
- Peritoneal Mphis were analyzed for cell counts, cytokine production (IL-6, IL-1beta, TNF-alpha) after LPS stimulation, phagocytic capacity, chemotaxis, and hydrogen peroxide production.
- Comparisons were made between CHF rats and sham-operated controls after 12 weeks.
Main Results:
- CHF rats exhibited significantly higher Mphis cell numbers, phagocytic capacity, chemotaxis index, and hydrogen peroxide production compared to controls.
- Production of IL-6 and TNF-alpha was significantly enhanced in Mphis from CHF rats.
- Mphis from CHF rats showed increased responsiveness to lipopolysaccharide (LPS) stimulation.
Conclusions:
- Peritoneal macrophage function is significantly modified during chronic heart failure development in rats.
- These functional alterations in Mphis may contribute to the pathophysiological processes underlying CHF.
- Further research is warranted to identify factors modulating Mphis activity in CHF.
