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7 protocols using hct 8 cells

1

Cryptosporidium parvum Oocyst Purification and Cell Culture

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Cryptosporidium parvum oocysts (IOWA isolate) were purchased from Waterborne, Inc. (New Orleans, LA, United States) and stored in phosphate-buffered saline (PBS) with antibiotics at 4°C. All oocysts used in this study were stored for less than 3 months. Before usage, oocysts were treated on ice with chilled 0.5% sodium hypochlorite for 10 min and washed three times afterward with PBS by centrifugation at 13,200 × g for 2 min.
Human colon adenocarcinoma cells (HCT-8 cells) were purchased from the cell bank of the Chinese Academy of Sciences. They were cultured in RPMI 1640 medium supplemented with 10% fetal bovine serum (FBS), 100 U/mL penicillin, and 100 μg/mL streptomycin at 37°C and 5% CO2.
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2

Culturing Human Colon Cancer Cells

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Human colon cancer HCT-8 cells were purchased from the Cell Bank of the Chinese Academy of Sciences (Shanghai, China). Cells were maintained in Dulbecco's modified Eagle's medium (Santa Clara, State of California) containing 10% fetal calf serum, 100 μg/mL penicillin, and 100 μg/mL streptomycin, at 37°C in a CO 2 incubator. The cells were subcultured every 2-3 days, after treatment with 0.02% ethylenediaminetetraacetic acid and 0.1% trypsin.
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3

Colon Cancer Cell Line Culture and STAT5 Inhibition

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The HCT116, SW620, and RKO COAD cell lines were obtained from American Type Culture Collection (Manassas, VA, USA). HCT8 cells were obtained from the China Center for Type Culture Collection (Wuhan, China). The NCM460 cell line was purchased from INCELL (San Antonio, TX, USA). The SW620 and HCT116 cell lines were cultured in Dulbecco’s Modified Eagle Medium (Gibco, Grand Island, NY, USA), RKO cells were cultured in Minimum Essential Medium (Gibco), HCT-8 cells were cultured in RPMI-1640 (Gibco), and NCM460 cells were cultured in M300F (INCELL). All cell culture media were supplemented with 10% fetal bovine serum (Gibco) and penicillin/streptomycin (Hyclone, Logan, UT, USA), and the cells were cultured in a humidified incubator at 37°C and 5% CO2.
The STAT5 inhibitor pimozide was obtained from MedChemExpress (Monmouth Junction, NJ, USA) and used to treat the colon cancer cells at a dose of 10 μM for 24 h.
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4

Propagation of Attenuated PRV Vaccine Strains

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Human colon cancer cell line HCT-8 cells were purchased from China Center for Type Culture Collection and cultured in RPMI 1640 medium (Gibco, Carlsbad, CA, USA) containing 10% FBS (Gibco, Carlsbad, CA, USA) and 100 U/mL penicillin-streptomycin. VERO (African green monkey kidney) cells were purchased from the China Center for Type Culture Collection and cultured in DMEM medium (Gibco, Carlsbad, CA, USA) containing 10% FBS. PRV Bartha K61 strain and PRV HB98 strain are widely used live attenuated vaccine strains, which were purchased from China Animal Husbandry Industry Co., Ltd., (Beijing, China) and Wuhan Keqian Animal Biological Products Co., Ltd., (Wuhan, China) respectively. The PRV Bartha K61 strain lacks primarily the gE and gI genes, whereas the PRV HB98 strain lacks the TK, gG, and gE genes [22 (link),23 (link)]. The viruses were propagated in VERO cells and stored at −70 °C until use.
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5

Fecal Virus Isolation and Cultivation

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Following positive PCR results, the fecal supernatant was filtered with a 0.45 μm filter and treated with 10 µg/mL trypsin (Gibco, USA) for 30 min, then the treated fecal supernatant was inoculated for 1 h. HCT-8 cells, obtained from the China Center for Type Culture Collection, were cultured at 37℃ with 5% CO2 in RPMI 1640 containing 5 µg/mL trypsin for 3 days after the inoculum was discarded. After observing CPE (cytopathic effect), the virus was collected.
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6

HCT-8 Cell Culture Maintenance

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HCT-8 cells (Type Culture Collection of the Chinese Academy of Sciences, Shanghai, China) were maintained (37°C, 5% CO2) in Dulbecco's modified Eagle's medium supplemented with 10% fetal calf serum (all from Gibco; Thermo Fisher Scientific, Inc., Waltham, MA, USA), 100 µg/ml penicillin, and 100 µg/ml streptomycin. The cells were passaged every 2–3 days, using 0.02% EDTA and 0.1% trypsin.
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7

Establishing Multidrug-Resistant Colorectal Cancer Cell Model

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Human colorectal cancer cells HCT116 were obtained from the Type Culture Collection of the Chinese Academy of Sciences (Shanghai, China); The multidrug-resistant human colorectal cancer cell line HCT-8/5-FU (MDR) was developed by incubating parental HCT-8 cells (TCCCAS, Shanghai, China) according to the method described by Han et al [36 (link)]. As a non-cancerous counterpart, human colonic epithelial NCM460 cells were purchased from INCELL, San Antonio, USA. Cells were maintained in RPMI-1640 medium which were supplemented with 10% (v/v) fetal calf serum, 1% (v/v) nonessential amino acids, 1% (v/v) sodium pyruvate, 12 mM L-glutamine, and 1% (v/v) penicillin/streptomycin (all from Invitrogen). at 37°C in a water-saturated atmosphere with 5% CO2, and subcultured by standard methods.
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