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6 protocols using mkn 45

1

Cultured Gastric Cell Lines: GES-1 and MKN-45

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The normal gastric cell line (GES-1) and gastric cancer cell line (MKN-45) were obtained from iCell Bioscience Inc., (Shanghai, China).
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2

Gastric Cancer Cell Line Cultivation

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Human GC cell lines, including AGS, BGC-823, MGC-803, MKN45, SGC-7901, and human normal gastric epithelial cell line GES-1 were purchased from iCell Bioscience Inc. (Shanghai, China). AGS, BGC-823, and MGC-803 were cultured in DMEM medium, and MKN45, SGC-7901, and GES-1 were cultured in RPMI-1640 medium. All the mediums were purchased from Gibco (Carlsbad, CA, USA) and added 10% fetal bovine serum (Gibco) and 1% penicillin-streptomycin sulfate (Gibco). MG132 was obtained from Selleckchem (Radnor, PA, USA) and 10 μM of MG132 was used to treat cells.
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3

Establishing 5-Fu Resistant Gastric Cancer Cell Line

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Human GC tumor cell lines SGC-7901 and MKN-45 were purchased from iCell Bioscience (Shanghai, China). The 5-Fu-sensitive gastric cancer line, SGC-7901, was cultured in RPMI 1640 medium (Gibco, Gaithersburg, MD, USA) containing 10% fetal bovine serum (Gibco, Gaithersburg, MD, USA) and 1% penicillin-streptomycin (Gibco, Gaithersburg, MD, USA) at 37 °C in a 5% CO2 incubator. The cells were digested with 0.25% trypsin and routinely passaged when the cells grew to 70–80% confluency. The stepwise addition method was used, starting from addition of 10 nmol/L 5-Fu (Yuanye Bio-Technology, Shanghai, China) until the cells can grew stably in culture medium containing 10 μM 5-Fu; the constructed drug-resistant cell line was named SGC-7901-5-Fu. The drugs were withdrawn 2 weeks before the experiment and routinely cultivated for future use.
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4

Cultivation of MKN-45 Gastric Cancer Cells

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The human gastric cancer cell line MKN-45 was purchased from iCell Bioscience Inc, which was authenticated by short tandem repeats (STR) profiling and confirmed to be mycoplasma-free. MKN-45 cells were cultured in the RPMI-1640 medium (Invitrogen, CA, USA) supplemented with 10% fetal bovine serum (Gibco, Australia) and penicillin/streptomycin (Gibco, MA, USA) at 37°C in a 5% CO2 water-saturated atmosphere. 3.
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5

Quantification of Gastric Cancer CircRNA Levels

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Human gastric epithelial cell line GES-1 and GC cell lines HGC-27 were obtained from Beyotime (ShangHai, China), GC cell lines AGS were derived from American Tissue Culture Collection (ATCC, Rockville, MD, USA) while MKN-45 were derived from iCell Bioscience Inc, (ShangHai, China). All cells were incubated in RPMI-1640 (GIBCO, Invitrogen Corporation, NY, USA), supplemented with 10% fetal bovine serum (FBS) (Hyclone, Logan, UT, USA). All cell lines were grown at 37˚C in 5% CO 2 .
Total RNA of cells were extracted by Total RNA extraction kit (Takara, Japan) and reverse transcribed into cDNA using the iScript cDNA synthesis kit (Bio-Rad, Hercules, CA, USA). CircRNA expression level was measured by qRT-PCR using SYBR Green Premix Ex TaqTM (Takara, Japan) on ABI 7500 real-time uorescence quantitative PCR instrument (Applied Biosystems Inc, USA). Primers for circRNAs and GAPDH were as follows: hsa_circ_0001998: F-CCTGGCGTTGGATTATGCTC and R-AAGCAGCAACCGGAGAGATT; hsa_circ_0002504: F-TTTCGTTTTGATGGCTGGCT and R-TCATCTTTGATGCTGTTGTGCT; GAPDH: F-GCACCGTCAAGGCTGAGAAC and R-TGGTGAAGACGCCAGTGGA.
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6

Gastric Cancer Cell Line Culture

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Human GC cell lines, including AGS, BGC-823, MGC-803, MKN45, SGC-7901, and human normal gastric epithelial cell line GES-1 were purchased from iCell Bioscience Inc. (Shanghai, China). AGS, BGC-823, and MGC-803 were cultured in DMEM medium, and MKN45, SGC-7901, and GES-1 were cultured in RPMI-1640 medium. All the mediums were purchased from Gibco (Carlsbad, CA, USA) and 10% fetal bovine serum (Gibco) and 1% penicillin-streptomycin sulfate (Gibco) were added. 10 μM of MG132 (Selleckchem, Radnor, PA, USA), a proteasome inhibitor, or 100 μg/ml of cycloheximide (Selleckchem), a protein synthesis inhibitor were used to treat cells.
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