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6 protocols using hmc3 human microglial cell line

1

Characterizing Human Microglial Cell Responses

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The HMC3 human microglial cell line (ATCC CRL-3304) and EMEM medium (ATCC 30–2003) were purchased from American Type Culture Collection (ATCC, Manassas, VA). BrdU (59–14-3) and mouse anti-BrdU (B2531) monoclonal antibody (mAb) were purchased from Sigma (St. Louise, MO). BAY 11–7082 was obtained from Cayman Chemical (Ann Arbor, MI, cat# 10010266). Human IL-6 DuoSet ELISA (DY206) kits were purchased from R&D Systems (Minneapolis, MN). Phospho-p53 (Ser 15) antibody (#9284), p53 mouse mAb (#2524), NF-κB p65 rabbit mAb (#8242), p21 Waf1/Cip1 rabbit mAb (#2947), and β-Actin mouse mAb (#3700) were purchased from Cell Signaling (Danvers, MA). Alexa Fluor-594 labeled goat anti-mouse IgG (#A10680) and Alexa Fluor-647 labeled goat anti-rabbit IgG (#A21244) were purchased from Thermo Fisher (Waltham, MA). Mouse anti-human p16 mAb (cat# 51–1325GR) was obtained from BD Biosciences. Mouse anti-human CD68 mAb (Cat# 14–0688-82, clone: KP1) was obtained from Thermo Fisher. Pro-Long Gold Anti-Fade Reagent (#9071) was obtained from Cell Signaling Technology (Danvers, MA).
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2

Culturing HMC3, PC12, and iPSC-derived Microglia

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HMC3 human microglial cell line (CRL-3304) and PC12 cell line (CRL-1721) were purchased from ATCC (American Type Culture Collection). HMC3 cells were cultured in DMEM medium with 10% FBS, 1% l-glutamine, and 1% penicillin/streptomycin (P/S) and maintained in a 37 °C incubator at 5% CO2. PC12 cells were cultured in RPMI-1640 medium supplemented with 10% HS, 5% FBS, and 1% P/S then placed in humidified air chamber containing 5% CO2 at 37 ℃. The monolayer cells were harvested by trypsin and seeded into microplates to assess the compound effect on neurite outgrowth. Human iPSC-derived microglia (Cat#BX-0900) was purchased from BrainXell.
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3

Culturing Human Microglial and HEK293 Cells

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The HMC3 human microglial cell line was obtained from American Type Culture Collection (ATCC CRL-3304). HEK293 and HMC3 cells were cultured in Eagle’s Modified Minimum Essential Medium (EMEM), ATCC modification (ATCC 30–2003) supplemented with 10% fetal bovine serum, defined (HyClone, GE Healthcare SH30070.03); 50 U/mL penicillin, 50 μg/mL streptomycin (Gibco 22400–089). Cells were maintained at 37°C in a 5% CO2 in air atmosphere.
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4

Investigating Transcriptional Regulation of LOX-1

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We identified the binding sites for NF-kB, Oct-1 and HIF-1α in the promoter region of the human OLR1 gene from the UCSC Genome Browser (http://genome.ucsc.edu). To identify whether the transcription factors NF-κB and HIF-1α control the expression of LOX-1 in microglia, we performed a chromatin immunoprecipitation assay using the ChIP Kit-One Step (ab117138; Abcam, Cambridge, UK) with the HMC3 human microglial cell line (CRL-3304; American Type Culture Collection, Manassas, VA). According to the manufacturer’s instructions, we collected OGD-treated microglial cells, fixed them with 1% formaldehyde and fragmented them with sonication. We used antibodies against NF-κB (PA5-16545; Thermo Fisher Scientific) and HIF-1α (AF1935; R&D Systems) and primer sets for NF-κB and HIF-1α (Additional file 3: Table S2).
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5

Culture of Human Microglial Cells

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The HMC3 human microglial cell line was obtained from American Type Culture Collection (ATCC CRL-3304). HEK293 and HMC3 cells were cultured in Eagle's Modified Minimum Essential Medium (EMEM), ATCC modification (ATCC supplemented with 10% fetal bovine serum, defined (HyClone, GE Healthcare SH30070.03); 50 U/mL penicillin, 50 µg/mL streptomycin (Gibco 22400-089). Cells were maintained at 37°C in a 5% CO2 in air atmosphere.
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6

Culturing HMC3 Human Microglial Cells

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The HMC3 human microglial cell line was purchased from the American Type Culture Collection (ATCC, LGC Standards, Manassas, VA, USA; Cat. No. CRL-3304). Cells were cultured in Eagle’s Minimum Essential Medium (EMEM; Merck; Cat. No. M4655) with the addition of 10% fetal bovine serum (FBS; Cat. No. 10500-064; ThermoFisher), sodium pyruvate (1×; ThermoFisher; Cat. No. 11360-070), non-essential amino acids (1×; Cat. No. 11140-035; ThermoFisher) and penicillin (100 U/mL)/streptomycin (100 μg/mL; ThermoFisher) at 37 °C with 5% CO2. Based on experimental plans, cells were plated with the following densities: 600 k cells/well in 6-well plates, 400 k cells/well in 12-well plates, 15 k cells/well in 96-well plates (Falcon, Milan, Italy).
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