Biodistribution and clearance of instilled carbon nanotubes in rat lung.

Biodistribution and clearance of instilled carbon nanotubes in rat lung.
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大鼠肺中灌输碳纳米管的生物分布和清除。

DOI:
10.1186/1743-8977-5-20
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发表时间:
2008-12-09
影响因子:
10
通讯作者:
Lacroix G
Lacroix G
中科院分区:
医学1区
文献类型:
--
作者:
Elgrabli D;Floriani M;Abella-Gallart S;Meunier L;Gamez C;Delalain P;Rogerieux F;Boczkowski J;Lacroix G

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碳纳米管只由碳原子组成,具有疏水性,在生物组织中几乎检测不到。这些特性使生物动力学和毒理学研究变得更加复杂。在这里,我们提出了一种基于检测镍的方法来研究碳纳米管在生物体中的生物持久性,镍是我们研究的多壁碳纳米管中存在的一种金属。我们在气管内滴注MWCNT的大鼠身上的结果显示,MWCNT可以被消除,并且不会显著穿过肺屏障,但在独特的滴注6个月后仍存在于肺中。多壁碳纳米管的结构也被化学修饰并在肺中被切割。这些结果为CNT在呼吸给药后6个月的生物持久性和清除性提供了第一个数据。
Constituted only by carbon atoms, CNT are hydrophobic and hardly detectable in biological tissues. These properties make biokinetics and toxicology studies more complex. We propose here a method to investigate the biopersistence of CNT in organism, based on detection of nickel, a metal present in the MWCNT we investigated. Our results in rats that received MWCNT by intratracheal instillation, reveal that MWCNT can be eliminated and do not significantly cross the pulmonary barrier but are still present in lungs 6 months after a unique instillation. MWCNT structure was also showed to be chemically modified and cleaved in the lung. These results provide the first data of CNT biopersistence and clearance at 6 months after respiratory administration.
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