title: Dual functions of highly potent graphene derivative-poly-L-lysine composites to inhibit bacteria and support human cells.
abstract: Dual-function poly(L-lysine) (PLL) composites that function as antibacterial agents and promote the growth of human cell culture have been sought by researchers for a long period. In this paper, we report the preparation of new graphene derivative-PLL composites via electrostatic interactions and covalent bonding between graphene derivatives and PLL. The resulting composites were characterized by infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. The novel dual function of PLL composites, specifically antibacterial activity and biocompatibility with human cells [human adipose-derived stem cells and non-small-cell lung carcinoma cells (A549)], was carefully investigated. Graphene-DS-PLL composites composed of 4-carboxylic acid benzene diazonium salt (DS) generated more anionic carboxylic acid groups to bind to cationic PLLs, forming the most potent antibacterial agent among PLL and PLL composites with high biocompatibility with human cell culture. This dual functionality can be used to inhibit bacterial growth while enhancing human cell growth.
authors: National Creative Research Initiative, Center for Smart Molecular Memory, Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon-Dong, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea.
authors: Surajit
authors: S
authors: Some
authors: Seok-Man
authors: SM
authors: Ho
authors: Pooja
authors: P
authors: Dua
authors: Eunhee
authors: E
authors: Hwang
authors: Young Hun
authors: YH
authors: Shin
authors: HeeJoun
authors: H
authors: Yoo
authors: Jong-Sun
authors: JS
authors: Kang
authors: Dong-ki
authors: DK
authors: Lee
authors: Hyoyoung
authors: H
authors: Lee
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects; D006108:Graphite / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D008422:Materials Testing; D049329:Nanostructures / Q000008:administration & dosage* / Q000737:chemistry*; D011107:Polylysine / Q000494:pharmacology*; D013234:Stem Cells / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D011107:Polylysine; D006108:Graphite