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Biological effects induced by nanosilver particles: in vivo study
Dandan Chen1, Tingfei Xi, Jing Bai
1National Institute for the Control of Pharmaceutical and Biological Products, Beijing, People's Republic of China.
Biomedical Materials (Bristol, England)
|May 7, 2008
Summary
Nanosilver and microsilver particles showed good biocompatibility initially in rat muscle. However, nanosilver induced more severe inflammation by day 30 compared to microsilver.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Toxicology
Background:
- Silver nanoparticles (nanosilver) and microsilver particles are used in various biomedical applications.
- Understanding their local biocompatibility and potential inflammatory responses is crucial.
Purpose of the Study:
- To compare the local biocompatibility and pathological effects of nanosilver and microsilver particles implanted in rat muscle.
- To evaluate the time-dependent biological responses to these silver particles.
Main Methods:
- Surgical implantation of nanosilver and microsilver particles into the back muscle of rats.
- Histopathological and biocompatibility assessments at multiple time points (7, 14, 30, 90, and 180 days).
Main Results:
- Both nanosilver and microsilver particles demonstrated good biological effects at early time points (days 7 and 14).
- A significant shift to adverse biological effects was observed by day 30.
- Nanosilver particles elicited a more pronounced inflammatory response than microsilver particles at day 30.
Conclusions:
- Initial biocompatibility of nanosilver and microsilver is comparable.
- Nanosilver particles present a higher risk of local inflammation in muscle tissue compared to microsilver particles after a critical time point.
- Further research is needed to understand the long-term implications and mechanisms of nanosilver-induced inflammation.
