The Importance of Evaluating the Lot-to-Lot Batch Consistency of Commercial Multi-Walled Carbon Nanotube Products

Nanomaterials

Carole Mikoryak¹  Samad Yousuf²  Rockford Draper²  Alexander Brown²  Jason Lin²  KennethJ. Balkus²  Paul Pantano²  RonaldA. Smaldone²  Bryanna LeGrand²  ShashiniD. Diwakara²  Raina Rahman²  MaiT. Huynh²  Hong Pham²  JeanFrancois Veyan³ 

[1] Department of Biological Sciences, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA;Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA;Department of Materials Science and Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA;

关键词: nanotoxicity;    nanomedicine;    engineered nanoparticles;    carbon nanomaterials;    macrophages;   

DOI  :  10.3390/nano10101930

来源: DOAJ

【 摘 要 】

The biological response of multi-walled carbon nanotubes (MWNTs) is related to their physicochemical properties and a thorough MWNT characterization should accompany an assessment of their biological activity, including their potential toxicity. Beyond characterizing the physicochemical properties of MWNTs from different sources or manufacturers, it is also important to characterize different production lots of the same MWNT product from the same vendor (i.e., lot-to-lot batch consistency). Herein, we present a comprehensive physicochemical characterization of two lots of commercial pristine MWNTs (pMWNTs) and carboxylated MWNTs (cMWNTs) used to study the response of mammalian macrophages to MWNTs. There were many similarities between the physicochemical properties of the two lots of cMWNTs and neither significantly diminished the 24-h proliferation of RAW 264.7 macrophages up to the highest concentration tested (200 μg cMWNTs/mL). Conversely, several physicochemical properties of the two lots of pMWNTs were different; notably, the newer lot of pMWNTs displayed less oxidative stability, a higher defect density, and a smaller amount of surface oxygen species relative to the original lot. Furthermore, a 72-h half maximal inhibitory concentration (IC-50) of ~90 µg pMWNTs/mL was determined for RAW 264.7 cells with the new lot of pMWNTs. These results demonstrate that subtle physicochemical differences can lead to significantly dissimilar cellular responses, and that production-lot consistency must be considered when assessing the toxicity of MWNTs.

【 授权许可】

Unknown