title: Cytotoxicity and variant cellular internalization behavior of water-soluble sulfonated nanographene sheets in liver cancer cells.
abstract: Highly exfoliated sulfonated graphene sheets (SGSs), an alternative to graphene oxide and graphene derivatives, were synthesized, characterized, and applied to liver cancer cells in vitro. Cytotoxicity profiles were obtained using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, WST-1[2-(4-iodophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium, and lactate dehydrogenase release colorimetric assays. These particles were found to be non-toxic across the concentration range of 0.1 to 10 μg/ml. Internalization of SGSs was also studied by means of optical and electron microscopy. Although not conclusive, high-resolution transmission and scanning electron microscopy revealed variant internalization behaviors where some of the SGS became folded and compartmentalized into tight bundles within cellular organelles. The ability for liver cancer cells to internalize, fold, and compartmentalize graphene structures is a phenomenon not previously documented for graphene cell biology and should be further investigated.
authors: Department of Surgical Oncology, University of Texas M, D, Anderson Cancer Center, Unit 107, Rm, T4,3936, 6767 Bertner, Houston, TX, 77030, USA. scurley@mdanderson.org.
authors: Stuart J
authors: SJ
authors: Corr
authors: Mustafa
authors: M
authors: Raoof
authors: Brandon T
authors: BT
authors: Cisneros
authors: Oleksandr
authors: O
authors: Kuznetsov
authors: Katheryn
authors: K
authors: Massey
authors: Warna D
authors: WD
authors: Kaluarachchi
authors: Matthew A
authors: MA
authors: Cheney
authors: Edward W
authors: EW
authors: Billups
authors: Lon J
authors: LJ
authors: Wilson
authors: Steven A
authors: SA
authors: Curley
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