Proteomic profiling of halloysite clay nanotube exposure in intestinal cell co‐culture. Issue 11 (22nd April 2013)

• Record Type: Journal Article
• Authors: Lai, Xianyin; Agarwal, Mangilal; Lvov, Yuri M.; Pachpande, Chetan; Varahramyan, Kody; Witzmann, Frank A.
• Is Part Of: Journal of applied toxicology. Volume 33:Issue 11(2013)
• Page Start: 1316
• Page End: 1329
• Publication Date: 2013-04-22
• Subjects: halloysite -- intestinal epithelia -- enterocytes -- proteomics -- label‐free quantitative mass spectrometry; Toxicology -- Periodicals; Industrial toxicology -- Periodicals; Environmentally induced diseases -- Periodicals; Toxicology -- Periodicals; 615.9005
• DOI: 10.1002/jat.2858
• Languages: English
• ISSNs: 0260-437X

Abstract

ABSTRACT: Halloysite is aluminosilicate clay with a hollow tubular structure with nanoscale internal and external diameters. Assessment of halloysite biocompatibility has gained importance in view of its potential application in oral drug delivery. To investigate the effect of halloysite nanotubes on an in vitro model of the large intestine, Caco‐2/HT29‐MTX cells in monolayer co‐culture were exposed to nanotubes for toxicity tests and proteomic analysis. Results indicate that halloysite exhibits a high degree of biocompatibility characterized by an absence of cytotoxicity, in spite of elevated pro‐inflammatory cytokine release. Exposure‐specific changes in expression were observed among 4081 proteins analyzed. Bioinformatic analysis of differentially expressed protein profiles suggest that halloysite stimulates processes related to cell growth and proliferation, subtle responses to cell infection, irritation and injury, enhanced antioxidant capability, and an overall adaptive response to exposure. These potentially relevant functional effects warrant further investigation in in vivo models and suggest that chronic or bolus occupational exposure to halloysite nanotubes may have unintended outcomes. Copyright © 2013 John Wiley & Sons, Ltd. Abstract : In view of their potential application in oral drug delivery, we investigated the effect of halloysite nanotubes in an in vitro model of the large intestine. Toxicity tests and label‐free quantitative mass spectrometric analysis indicate that halloysite exhibits a high degree of biocompatibility characterized by an absence of cytotoxicity, despite elevated proinflammatory cytokine release. Bioinformatic analysis of differentially expressed protein profiles suggest that halloysite stimulates processes related to cell growth and proliferation, subtle responses to cell infection, irritation and injury, enhanced antioxidant capability, and an overall adaptive response to exposure.