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74 protocols using cell proliferation kit

1

Cytotoxicity and Proliferation Assay of PLGA-based Photothermal Therapy

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Cells were seeded in 24-well plates and allowed to adhere for 24 h. After replacing with serum-free media, the cells were maintained overnight. For cytotoxicity test, RM9 cells were incubated with PLGA-ICG-R848 with different concentrations of ICG for 4 h and irradiated without or with 808 nm laser (1W/cm2) for 10 min. After 24 h, the cell viability was detected using cell proliferation kit (Roche, Germany). For cell proliferation assay, RM9, PC-3, LNCaP and DU-145 cells were firstly treated for 4 h with PBS, PLGA, PLGA-R848, PLGA-ICG and PLGA-ICG-R848, containing the same concentration of ICG or R848 and next irradiated without or with 808nm laser (1W/cm2) for 10 min. After 24 h, the cell viability was detected using cell proliferation kit (Roche, Germany).
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Colorimetric Cell Viability Assay

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For assay of cell viability, cells were seeded into 24 well-plate at 10000 cells per well and subjected to a Cell Proliferation Kit (MTT, Roche, Indianapolis, IN, USA), according to the instruction of the manufacturer. The MTT assay is a colorimetric assay for assessing viable cell number, taking advantage that NADPH-dependent cellular oxidoreductase enzymes in viable cells reduce the tetrazolium dye 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) to its insoluble formazan in purple readily being quantified by absorbance value (OD) at 570 nm. Experiments were performed 5 times.
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3

Prostate Cancer Cell Proliferation Assay

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The effect of the two compounds in the proliferation of human prostate cancer cell line was determined as previously described by using the XTT (sodium 3′-[1-(phenylaminocarbonyl)-3,4-tetrazolium]-bis(4-methoxy-6-nitro)benzene sulfonic acid hydrate) cell proliferation kit (Roche Molecular Biochemicals, Mannheim, Germany) as previously described [11 (link),12 (link)]. Cells (5.0 × 103 in 100 μL) were incubated in RPMI-1640 culture medium containing 10% heat-inactivated FBS, in the absence and in the presence of the indicated compounds at a concentration range of 10−3 to 10−9 M, in 96-well flat-bottomed microtiter plates, and following 72 h of incubation at 37 °C in a humidified atmosphere of air/CO2 (19/1), the XTT assay was performed. Measurements were done in triplicate, and each experiment was repeated three times. The IC50 (50% inhibitory concentration) value, defined as the drug concentration required to cause 50% inhibition in the cellular proliferation with respect to the untreated controls, was determined for each compound.
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4

Evaluating Organoid Viability via MTT Assay

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Organoid viability was evaluated using a cell proliferation kit (Roche, Germany). In brief, after culture medium removal, 10 μl MTT-labeling reagent was added to the organoid culture for 1 h. Viable organoids, which could reduce the MTT reagent to formazan, were imaged using a light microscope. After adding DMSO to solubilize the formazan crystals, the absorbance of the colored solution was measured using a microplate reader at 575 nm and a reference at 650 nm. Cell viability was calculated as the percentage of viable cells relative to the non-treated group.
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5

MTT Assay for Cell Viability

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Cell viability was assayed based on the conversion of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) by using a cell proliferation kit (Roche Korea, Seoul, Korea). HaCaT cells in 100 μL culture medium were seeded into a 96‑well plate, and CS extract was added to the wells at concentrations ranging between 10 and 50 μg/mL. Following incubation for 48 h at 37°C, 10 μL MTT solution was added, followed by incubation for 4 h. Solubilization solution (100 μL) was added to the wells and following 24 h incubation, absorbance was measured at 550 nm by using an ELx808 enzyme‑linked immunosorbent assay (ELISA) reader (Bio‑Tek Instruments, Winooski, VT, USA).
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6

Cytotoxicity of cis- and trans-TMS

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Cytotoxicity assay used the Cell Proliferation Kit (Roche Applied Science). On a 96 wells plate, 104 cells/well were seeded and incubated in an atmosphere of 5% CO2 at 37 °C for 24 h. After this period, the cells were exposed to different concentrations of cis-TMS and trans-TMS (7.8 to 1000 µM), 0.5 µM of doxorubicin, or 0.1% of DMSO. Doxorubicin and DMSO were positive and vehicle control, respectively. The cells were incubated for an additional 24 h and, the plate was washed with phosphate buffer saline (PBS 1x). The plate was then incubated with DMEM without phenol red plus the XTT/electron solution for 4 h. Total absorbance was measured at 492 and 690 nm. The number of viable cells was directly proportional to the absorbance and the percentage was compared with the negative control.
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7

MTT Assay for Viable Cell Number

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For assay of viable cell number, 5×10 3 cell per well were seeded into 96 well-plate and subjected to a Cell Proliferation Kit (MTT, Roche, Indianapolis, IN, USA), according to the instruction of the manufacturer. The MTT assay is a colorimetric assay for assessing viable cell number, taking advantage that NADPH-dependent cellular oxidoreductase enzymes in viable cells reduce the tetrazolium dye 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) to its insoluble formazan in purple readily being quantified by absorbance value (OD) at 570 nm in a microtiter plate reader (Promega, Fitchburg, WI, USA). Experiments were performed 5 times.
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8

Cell Proliferation Assay with NPs

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WST-1 assay was used to investigate the cell proliferation. Cells were seeded on 96-well plate at a density is 10,000 cells/well and incubated overnight. The cell viability was estimated after cells exposure to different concentration of NPs for 24 h by WST-1 assay (cell proliferation kit, Roche). The absorption is measured by a spectrophotometer (ELISA reader) at a wavelength of 450 nm.
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9

Cell Viability Assay for N2a Cells

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The cell viability of N2a cells in the presence of compounds was monitored by an MTT-assay. Uninduced N2a cells were incubated in the presence of 60 µM compound (all compounds) or at several compound concentrations (0 to 60 µM; Fig. 6B-D; Table 4) in the cell culture medium over 4 days at 37°C. The MTT-assay was performed according to the manufacturer's instructions (Roche, Cell Proliferation Kit, Cat.No. 11465007001).
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10

Cell Proliferation Assay with 6-HAP

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B16F10, Pam212, L5178, and YAC-1 cell lines were obtained from American Type Culture Collection (ATCC). Pam212, L5178, and YAC-1 cell lines were maintained directly from the authenticated vial from ATCC in RPMI 1640 supplemented with sodium pyruvate (1 mM), nonessential amino acids (0.1 mM), penicillin (100 unit/ml), streptomycin (100 μg/ml), and 10% heat-inactivated fetal bovine serum (FBS) or horse serum at 37°C under atmosphere of 5% (v/v) CO2 in air. B16F10 cell line was maintained directly from the authenticated vial from ATCC in Dulbecco’s modified Eagle’s medium supplemented with penicillin (100 unit/ml), streptomycin (100 μg/ml), and 10% heat-inactivated FBS. NHEKs were obtained from Invitrogen (Life Technologies) and maintained in EpiLife medium (Life Technologies) supplemented with 60 μM calcium, epidermal growth factors, penicillin, and streptomycin. After a 4-hour (tumor cell lines) or 24-hour (NHEK) incubation with 6-HAP, proliferative activity of cells was colorimetrically determined by monitoring BrdU incorporation with Cell Proliferation kit according to the manual (Roche).
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