Related Experiment Video
Updated: Jun 16, 2026
Depletion and Reconstitution of Macrophages in Mice
Published on: August 1, 2012
[Influence of magnetic Fe3O4 nanoparticle on functions of lymphocytes and macrophages in mice]
Nan Jin1, Jun Wang, Bao-An Chen
1Department of Hematology, Zhongda Hospital, Southeast University Clinical Medical College; Nanjing 210009, Jiangsu Province, China.
Abstract:
This study was purposed to investigate the effects of magnetic nanoparticle of Fe3O4 (Fe3O4-MNPs) on murine immune system. ICR mice were assigned randomly into four groups which were treated with normal saline, low, middle and high dose of MNP-Fe3O4 respectively. The mice were killed after being exposed by intragastric administration for 2 weeks. The ratios of spleen weight to body weight, lymphocyte transformation rate in spleen suspension and phagocytic index of macrophage in abdominal cavity were detected. The results showed that the ratios of spleen weight to body weight in Fe3O4-MNP groups were not significantly different in comparison with the control (p > 0.05). The lymphocyte transformation rate in spleen suspension in Fe3O4-MNP groups were all higher than that in control group (-0.1775 +/- 0.0246), especially in the middle dose group (0.1833 +/- 0.0593) (p < 0.05), and the phagocytic index of macrophages in abdominal cavity of middle dose group (0.2051 +/- 0.0213) was higher than that of control group and other two Fe3O4-MNP group (low dose 0.1538 +/- 0.0100, high dose 0.1511 +/- 0.0184) (p < 0.05). It is concluded that suitable dose of Fe3O4-MNP can enhance the cellular immune activity and phagocytic function of macrophages of mice.
Insights
Magnetic nanoparticles of iron oxide (Fe3O4-MNPs) were investigated for their effects on the murine immune system. A suitable dose of Fe3O4-MNPs was found to enhance cellular immune activity and macrophage phagocytic function in mice.
Area of Science:
- Immunology
- Nanotechnology
- Materials Science
Context:
- Magnetic nanoparticles (Fe3O4-MNPs) are increasingly explored for biomedical applications.
- Understanding their impact on the immune system is crucial for safe and effective use.
- Murine models provide a valuable platform for studying immune responses to nanomaterials.
Purpose:
- To investigate the immunomodulatory effects of Fe3O4-MNPs in a murine model.
- To determine dose-dependent effects of Fe3O4-MNPs on cellular immunity and macrophage function.
- To evaluate changes in spleen weight, lymphocyte proliferation, and macrophage phagocytosis.
Summary:
- ICR mice were administered varying doses of Fe3O4-MNPs intragastrically for two weeks.
- Spleen weight-to-body weight ratios showed no significant changes.
- Lymphocyte transformation rates and macrophage phagocytic indices were significantly enhanced, particularly at a middle dose.
- Fe3O4-MNPs did not significantly alter spleen weight to body weight ratios.
Impact:
- Fe3O4-MNPs at specific doses can positively modulate the murine immune system.
- This study suggests potential applications for Fe3O4-MNPs in enhancing cellular immunity.
- Findings provide insights into the immunocompatibility and potential therapeutic uses of iron oxide nanoparticles.
