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Harvesting Murine Alveolar Macrophages and Evaluating Cellular Activation Induced by Polyanhydride Nanoparticles
Published on: June 8, 2012
[Effect of hydroxylated fullerene C60(OH)25 on macrophage plasma membrane integrity]
Abstract:
Our study has shown that the damaging effect of hydroxylated fullerene C60(OH)25 on mouse peritoneal macrophage plasma membranes increased when we enlarged the concentration of fullerene in the incubation media (from 0.005 to 0.5 mg/ml), the incubation temperature (from 22 degrees C to 37 degrees C) and the time of incubation (from 30 to 90 min). In conditions of the H2O2-induced membrane damage, fullerene was observed to intensify the H2O2-induced damaging effect at a concentration of 0.05 mg/ml and reduce it at a concentration of 0.5 mg/ml. In conditions of the UV-induced membrane damage, it was discovered that the damaging effect of UV increased when C60(OH)25 nanoparticles were added to the incubation media before irradiation and decreased when they were added after irradiation. Eventual participation of ROS in damaging effects of C60(OH)25 was discussed.
Insights
Hydroxylated fullerene C60(OH)25 damages macrophage membranes, with effects intensifying with higher concentrations, temperatures, and incubation times. Its impact on H2O2 and UV-induced damage varies based on concentration and application timing.
Area of Science:
- Nanomaterials Science
- Cell Biology
- Biophysics
Context:
- Investigating the biological impact of nanomaterials is crucial for understanding their potential applications and risks.
- Fullerenes, particularly hydroxylated forms like C60(OH)25, are explored for various biomedical uses.
- Macrophage plasma membranes are key targets for assessing cellular toxicity and nanoparticle interactions.
Purpose:
- To elucidate the dose-dependent and condition-specific effects of hydroxylated fullerene C60(OH)25 on mouse peritoneal macrophage plasma membranes.
- To determine how incubation parameters (concentration, temperature, time) influence fullerene-induced membrane damage.
- To explore the role of reactive oxygen species (ROS) in the interaction between C60(OH)25 and cellular membranes under oxidative and UV stress.
Summary:
- Increased concentration, temperature, and incubation time of hydroxylated fullerene C60(OH)25 exacerbated damage to macrophage plasma membranes.
- C60(OH)25 intensified hydrogen peroxide-induced damage at low concentrations (0.05 mg/ml) but reduced it at high concentrations (0.5 mg/ml).
- UV-induced membrane damage was amplified when C60(OH)25 was added before irradiation and reduced when added post-irradiation, suggesting complex ROS-mediated interactions.
Impact:
- Findings highlight the critical influence of experimental conditions on fullerene nanoparticle toxicity.
- Provides insights into the dual role of C60(OH)25 in modulating oxidative and UV-induced cellular damage.
- Informs the safe design and application of hydroxylated fullerenes in biological systems and nanomedicine.
