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23 protocols using hacat cell

1

Antiproliferative Potential of Toad Venom Proteins

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The antiproliferative activity of the total protein of toad venom from HZ and LYG specimens against three selected cell lines was evaluated using an MTT assay, according to Mossman (1983). Briefly, HaCaT, MCF-7, and SGC-7901 cells (1 × 104 cells/well) were seeded into 96-well plates and incubated with different concentrations of proteins extracted from toad venom (0.01, 0.1, 1, 10, and 100 µg/mL) for 48 h. The morphology of cells from each treatment was imaged using a Leica DM3000B microscope (Leica Microsystems GmbH, Frankfurt, Germany) [53 (link)].
Meanwhile, the cell growth rate in the presence and absence of the toad venom samples was compared, and the normalized growth rate inhibition (GR) was used to evaluate the effect of the samples on the cells [54 (link)]. Three cells (4 × 106 cells/well) were seeded into 6-well plates and incubated with different concentrations of protein extracts (0.01, 0.1, 1, 10, 25, 50, 75, and 100 µg/mL) for 48 h. The cell count and death count were recorded when the extracts were present and absent, respectively. An online GR calculator (www.grcalculator.org) (accessed on 3 April 2023) was used for dose-response curves for GR value.
The HaCaT cell was provided by China Center for Type Culture Collection, CCTCC (Wuhan, China). The MCF-7 and SGC-7901 cells were obtained from the National Collection of Authenticated Cell Cultures (Shanghai, China).
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2

Cellular Uptake of HA-Chol-NPs-NIC

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HaCaT cell was obtained from China Center for Type Culture Collection (Wuhan, People’s Republic of China). The cells were cultured in DMEM supplemented with FBS (10%, v/v), 100 IU/mL penicillin, and 100 μg/mL streptomycin in the humidified atmosphere of 95% with 5% CO2 at 37°C. The medium was replenished every other day. The HaCaT cells were then cultured in a 15 mm2 confocal dish (1×105 cells/well) with DMEM medium. After cultured for 24 hours, the culture medium was removed and washed with phosphate buffer solution for three times. In all, 200 μL of HA–Chol–NPs–NIC, HA–Chol–NPs, NIC complex suspension, and aqueous suspension containing an equal amount of C6 (0.1%, w/v) were diluted by DMEM without FBS to 10 μg/mL and added to the dish, respectively. After culturing for 4 hours, the culture medium was removed and the cells were washed three times with phosphate buffer solution. Then the cells were fixed with 4% paraformaldehyde solution at ambient temperature for 15 minutes, and the nuclei of cells were labeled by DAPI. The cell uptake was evaluated using CLSM. The excitation and emission wavelengths of C6 were 430 nm and 485 nm, respectively.
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3

Culturing HaCaT Human Keratinocytes

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Human keratinocytes cell line HaCaT cells (China Center for Type Culture Collection) were cultured in Dulbecco’s modified Eagle’s medium containing 10% fetal bovine serum (Gibco, CA, USA). Cells have been authenticated by STR profiling.
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4

Irradiated Keratinocytes Bystander Effect

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The human immortalized keratinocytes HaCaT cells were obtained from China Center for Type Culture Collection (CCTCC, Wuhan, China). The human embryonic dermal fibroblasts WS1 cells were obtained from American Type Culture Collection (ATCC, Manassas, VA, USA). Both cell lines were grown in DMEM (high glucose, Sigma-Aldrich, St Louis, MO, USA) supplemented with 10% fetal bovine serum (FBS, Wisent, St-Bruno, Quebec, Canada), 100 U/ml streptomycin and 100 U/ml penicillin (both from Beyotime Institute of Biotechnology, China) at 37 °C in a humidified atmosphere of 95% air and 5% CO2.
To study the factors in irradiated HaCaT cells that were involved in the bystander effect in unirradiated WS1 cells, a transwell insert co-culture system was utilized. 1.2 × 105 HaCaT cells and 4 × 104 WS1 cells were seeded on coverslips in 6-well plates (with a growth area of 9.6 cm2) and in companion Millicell® transwell culture inserts (Millipore, MA, USA) (with a growth area of 5.7 cm2), respectively. The insert had a porous membrane with a pore size of 0.4 μm to allow the passage of molecules but not cells. Immediately after HaCaT being irradiated, the inserts with WS1 cells were put into the wells with HaCaT cells for 24 h. HaCaT and WS1 cells shared the same medium, but were separated from each other with a distance of 3 mm.
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5

Emodin-loaded PVP/CA Nanofibers for MRSA

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Emodin (purity, 98.6%) was purchased from Wei Ke Qi Biological Technology Co., Ltd. (Chengdu, China). Poly(vinyl pyrrolidone) (PVP, Mav = 1,300,000) and cellulose acetate (CA, acetyl content of 39.8%; MW = 30 kDa) were purchased from Dalian Meilun Biological Technology Co., Ltd. N,N-Dimethylacetamide (DMAC) and acetone were purchased from Shanghai Macklin Biochemical Co., Ltd. (Shanghai, China). Mannitol salt agar and Methicillin-resistant Staphylococcus aureus (MRSA) GDMCC 1.1263 were provided by Guangdong culture collection center (GDMCC 1.1263 = ATCC 43300). HaCaT cells were bought from China Center for Type Culture Collection (CCTCC, Wuhan, China).
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6

HaCaT Cell Culture Protocol

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Human keratinocyte cell line HaCaT cells (China Center for Type Culture Collection) were cultured in Dulbecco’s modified Eagle’s medium containing 10% fetal bovine serum (Gibco, Invitrogen Corp., Carlsbad, CA, USA). HaCaT cells have been authenticated using STR profiling.
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7

Characterization of Nano-TiO2 for Cytotoxicity Assays

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Nano-TiO 2 (P25, 25% rutile, and 75% anatase) with 21 nm was purchased from Degussa GmbH (Germany). The particle sizes and distribution of Nano-TiO 2 were measured by Tecnai G2 20 transmission electron microscope (FEI, Holland). Crystal structure was characterized by X'Pert Prox X-ray diffraction instrument (FEI). HaCaT cells were purchased from China Center for Type Culture Collection (China). Rhodamine 123, 2 0 ,7 0 -dichlorofluorescein diacetate (DCFH-DA) and 3-(4,5dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) were purchased from Sigma (St. Louis, MO). Modified Eagle medium (MEM), penicillin-streptomycin, and fetal bovine serum (FBS) were obtained from Hyclone Laboratories Inc. All other chemicals were of the highest grade that could be obtained commercially.
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8

HaCaT Cells Culture and Transfection

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HaCaT cells were purchased from the China Center for Type Culture Collection, Wuhan, China, and were cultured in DMEM containing 10%FBS in a 5% CO 2 incubator at 37°C. Lipofectamine was used to transfect cells with siRNA constructs (50 umol/L; GenePharma, Shanghai, China).
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9

Curcumin-Induced Differentiation of HaCaT Cells

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Immortalized human epidermal HaCaT cells (China Center for Type Culture Collection) were cultured in RPMI-1640 medium supplemented with 10% heat-inactivated fetal calf serum, 100 U/ml penicillin, and 100 mg/ml streptomycin (pH 7.2) at 37°C in air with 5% CO2. Twenty-four hours after seeding, the HaCaT cells were maintained in RPMI-1640 with 7.5 mg/l curcumin for 72 h to induce differentiation. HaCaT cells cultured in RPMI-1640 medium were used as the control.
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10

HaCaT Cell Cytokine Stimulation and GSDME Knockdown

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Human keratinocyte cell line, HaCaT cells, were obtained from China Center for Type Culture Collection (Wuhan, China). HaCaT cells were cultured in Dulbecco’s modified Eagle’s medium (DMEM) containing 10% fetal bovine serum (FBS) (both from Gibco, CA, USA) in 5% CO2 environment at 37 °C. HaCaT cells were treated with 10 ng/mL recombinant human (rh) IL-17A (R&D, Minneapolis, USA), 10 ng/mL rh OSM (R&D), 10 ng/mL rh TNF-α (R&D), 10 ng/mL rh IL22 (R&D), and 10 ng/mL rh IL1-α (R&D) in combination for 6, 12, 24, or 48 h. Transfection was performed according to previously described methods (45). For GSDME knockdown, HaCaT cells were transfected with pGLVH1/GFP + Puro lentivirus vector containing NC shRNA (shNC sequence: 5’-TTCTCCGAACGTGTCACGT-3’) or GSDME shRNA (shGSDME sequence: 5’-GCAGAAGTGTGTGATCTCTGA-3’) (GenePharma, Shanghai, China). Stable knockdown HaCaT cells were obtained and selected by puromycin incubation.
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