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Default Studies of single-walled carbon nanotube-induced hepatotoxicity by NMR-based metabonomics of rat blood plasma and liver extracts.

Studies of single-walled carbon nanotube-induced hepatotoxicity by NMR-based metabonomics of rat blood plasma and liver extracts.

Studies of single-walled carbon nanotube-induced hepatotoxicity by NMR-based metabonomics of rat blood plasma and liver extracts.

Nanoscale Res Lett. 2013 May 16;8(1):236

Authors: Lin B, Zhang H, Lin Z, Fang Y, Tian L, Yang H, Yan J, Liu H, Zhang W, Xi Z

Abstract
The toxicological effects of single-walled carbon nanotubes (SWCNTs) were investigated after intratracheal instillation in male Wistar rats over a 15-day period using metabonomic analysis of 1H (nuclear magnetic resonance) NMR spectra of blood plasma and liver tissue extracts. Concurrent liver histopathology examinations and plasma clinical chemistry analyses were also performed. Significant changes were observed in clinical chemistry features, including alkaline phosphatase, total protein, and total cholesterol, and in liver pathology, suggesting that SWCNTs clearly have hepatotoxicity in the rat. 1H NMR spectra and pattern recognition analyses from nanomaterial-treated rats showed remarkable differences in the excretion of lactate, trimethylamine oxide, bilineurin, phosphocholine, amylaceum, and glycogen. Indications of amino acid metabolism impairment were supported by increased lactate concentrations and decreased alanine concentrations in plasma. The rise in plasma and liver tissue extract concentrations of choline and phosphocholine, together with decreased lipids and lipoproteins, after SWCNT treatment indicated a disruption of membrane fluidity caused by lipid peroxidation. Energy, amino acid, and fat metabolism appeared to be affected by SWCNT exposure. Clinical chemistry and metabonomic approaches clearly indicated liver injury, which might have been associated with an indirect mechanism involving nanomaterial-induced oxidative stress.


PMID: 23680025 [PubMed - as supplied by publisher]



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