Journal
ACS NANO
Volume 5, Issue 1, Pages 516-522Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn1024303
Keywords
graphene; pharmacokinetics; biodistribution; toxicology
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Funding
- National Natural Science Foundation of China [51002100, 51072126]
- National 973 Program of China [2011CB911002]
- Research Grants Council of Hong Kong [Cit-yU5/CRF/08]
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Graphene has emerged as interesting nanomaterials with promising applications in a range of fields including biomedicine. In this work, for the first time we study the long-term in vivo biodistribution of I-125-labeled nanographene sheets (NGS) functionalized with polyethylene glycol (PEG) and systematically examine the potential toxicity of graphene over time. Our results show that PEGylated NGS mainly accumulate in the reticuloendothelial system (RES) including liver and spleen after intravenous administration and can be gradually,cleared, likely by both renal and fecal excretion. PEGylated NGS do not cause appreciable toxicity at our tested dose (20 mg/kg) to the treated mice in a period of 3 months as evidenced by blood biochemistry, hematological analysis, and histological examinations. Our work greatly encourages further studies of graphene for biomedical applications.
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