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7 protocols using sk n sh cell line

1

Cell Line Maintenance Protocol

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The LAN-5 neuroblastoma cell line was kindly provided by Dr Stuart Elliott Siegel (Children’s Hospital Los Angeles, Los Angeles, CA, USA) and the origin has been described previously (17 (link),18 (link)); the SK-N-SH cell line was purchased from American Type Culture Collection (Cambridge, MA, USA). The cells were maintained in RPMI-1640 (Gibco, Paisley, UK) supplemented with 10% fetal calf serum (FCS; Gibco) in an atmosphere of 5% CO2 at 37°C.
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2

Differentiation of SK-N-SH cells into neuronal cells

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Human SK-N-SH cell line was obtained from American Type Culture Collection (ATCC #HTB-11). Cells were cultured in polystyrene tissue culture flasks (Corning) as a monolayer in Eagle’s Minimum Essential Medium (EMEM; ATCC). This medium was supplemented with 10% (v/v) fetal bovine serum (FBS) and 1% penicillin-streptomycin-neomycin (Sigma). As this cell line is a mixture of different cells, retinoic acid (RA; Sigma) was used for differentiating SK-N-SH cells [23 (link)] into more neuronal cells [24 (link)]. Approximately 30,000 cells (per well in 6-well plates) were cutured in supplemented EMEM media for two days, followed by RA (10μM) treatment for two weeks and media was replaced every 3–4 days [23 (link), 25 (link)]. Using light microscopy, differentiated neuronal cultures were validated with the presence of neuronal cell markers (NeuN, PSD95 and NCAM) during the differentiation process [23 (link), 26 (link)] (Refer supplementary information).
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3

Polystyrene Nanoparticle Toxicity in Neuroblastoma Cells

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The 50 nm polystyrene nanoparticle (PS-NPs) beads (5% w/v) were purchased commercially from Janus New-Materials (Nanjing, China) (refer to the Supplementary Materials for more detailed parameters). SHSY-5Y cells, the clonal subline of neuroblastoma SK-N-SH cell line, were obtained from American Type Culture Collection (ATCC, Rockville, MD, USA). The 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di- phenytetrazo-liumromide (MTT), Rhodamine 123 (Rh 123), 2,7-dichlorodi- hydrofluorescein diacetate (DCFH-DA), tert-Butyl hydroperoxide (tBHP), and N-Acetylcysteine (NAC) were obtained from Sigma (St. Louis, MO, USA). The annexin V-fluoresceine isothiocyanate/propidium iodide (annexin V-FITC/PI) apoptosis detection kit was obtained from Sungene (Tianjin, China). Protein extraction and assay kit was purchased from Thermo (MA, USA). Fluo 3-AM was acquired from Dojindo (Kyushu, Japan). Lactate dehydrogenase (LDH) cytotoxicity assay kit and adenosine 5′-triphosphate (ATP) detection kit were obtained from Beyotime (Shanghai, China).
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4

Differentiating SK-N-SH Cells into Neuron-Like Cells

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Human SK-N-SH cell line was obtained from American Type Culture Collection (ATCC #HTB-11). Cells were cultured in Eagle’s Minimum Essential Medium (EMEM; ATCC). This media was supplemented with 1 % penicillin-streptomycin-neomycin (Sigma) and 10 % (v/v) fetal bovine serum (FBS). Retinoic acid (RA; Sigma) was used to induce SK-N-SH cells [12 (link)] to differentiate into more neuron-like cells [13 (link)] because this cell line is a mixture of different cell types. Approximately 15,000 cells were cultured in T-75 flask (Corning) supplemented with EMEM media for two days, and then Retinoic acid (10 μM) was added. Cells were treated with RA for two weeks and media was replaced every three-four days [12 (link)]. Cultures were monitored visually using light microscopy for morphological changes, and evaluated for neuronal cell markers (NeuN, PSD95 and NCAM) during the differentiation process [12 (link), 14 (link)].
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5

Neuroprotection Assay in SK-N-SH Cells

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Human neuroblastoma SK-N-SH cell line procured from American Type Culture Collection (ATCC, Manassas, VA, USA) was maintained in Eagle's Minimum Essential Medium (EMEM; ATCC, Manassas, VA, USA) decorated by 10% fetal bovine serum (FBS; Sijiqing Biologic Co. Ltd., Hangzhou, China) under the atmosphere of 5% CO 2 at 37°C. SK-N-SH cells were passaged at a 1:3 ratio every 3-4 days. SK-N-SH cells were cotreated by ascending concentrations of ICS II (12.5, 25 and 50 μM with 24 h; Nantong Feiyu Biological Technology Co., Ltd., Nanjing, China) [ 27 ] and 2 mM 1-methyl-4-phenylpyridinium ion (MPP + ) (Sigma-Aldrich, St. Louis, MO, USA) for 24 h [ 28 ] with the absence or presence of 10 μM Nrf2 inhibitor ML385 (Aladdin, Shanghai, China) for 24 h. [ 29 ]
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6

Propagation of Neuronal Cell Lines

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SK-N-SH cell lines were obtained from the American Type Culture Collection (ATCC; Rockville, MD, USA) and the cell culture method has been previously described (Moon and Park, 2015 (link)). The mouse neuronal cell lines ZW 13–2 and Zpl 3–4, which were established from the hippocampus of ICR (Prnp+/+) and Zürich I Prnp−/− mice, respectively, were kindly provided by Professor Yong-Sun Kim (Hallym University, Chuncheon, Kangwon-do, South Korea). The cells were grown in Dulbecco’s Modified Eagle Medium (DMEM; HyClone, Logan, UT, USA) containing 10% fetal bovine serum (FBS) and gentamycin (0.1 mg/mL) in a humidified incubator maintained at 37 °C with 5% CO2.
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7

Neuroblastoma SK-N-SH Cell Culture

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Human neuroblastoma (SK-N-SH) cell lines were purchased from the American Type Culture Collection (Manassas, VA, USA) and used to assess neuronal cell properties. SK-N-SH cells were grown in minimum essential medium (MEM) supplemented with 10 % FBS, 100 U/ml penicillin, and 100 µg/ml streptomycin (GIBCO-BRL, Gaithersburg, MD) at 37 °C in a humidified 5 % CO2 and 95 % air incubator. The cells were cultured to 80 % confluence and passaged every 3 days by trypsinization with 0.025 % trypsin/EDTA.
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