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6 protocols using penicillin

1

Chondrocyte Culture and Expansion

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Commercially available human chondrocytes (Provitro®, Berlin, Germany) were cultured in Chondrocyte Growth Medium basal (CGM, Provitro®, Berlin, Germany) supplemented with 10% fetal calf serum (Provitro®, Berlin, Germany), 100 IU penicillin/mL and 100 μg streptomycin/mL (Provitro®, Berlin, Germany).
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2

Neuroblastoma Cell Culture and Differentiation

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Neuroblastoma cells (7 × 103) were plated for 2 days in the 'maintenance medium', as follows: hepatocyte defined medium, serum free (BD Biocoat, Bedford, MA, USA, cat. no. 05449), Human EGF (epidermal growth factor) 5 μg/ml (BD Biosciences, Bedford, MA, USA, cat. no. 354052); 2 mM L-Glutamine (Euroclone, Pero (MI), Italy, cat. no. ECB3000D), 1% penicillin (100 units/ml)/streptomycin (100 mg/ml) (Lonza, cat. no. DE17-602E), and 10 ng/ml IGF-1 (insulin growth factor 1) (Provitro, Berlin, Germany, cat. no. 1480950020). After 2 days, the cells were plated in 'differentiation medium': hepatocyte defined medium, serum free, EGF 5 μg/ml, 2 mM L-Glutamine, 1% penicillin (100 units/ml)/streptomycin (100 mg/ml), human HGF (hepatocyte growth factor) 20 ng/ml (Provitro, cat. no. 1468954010), 20 ng/ml FGF-4 (fibroblast growth factor 4) (Provitro, cat. no. 1372 9500 05). The culture medium was added every 2 days. After about 20 days, the cells were collected and used for the experiments.
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3

Culturing Diverse Cell Lines for Experiments

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HEK293T, MCF7, and C2C12 cells were grown in DMEM (Biochrom AG) supplemented with 10% fetal calf serum (FCS; Biochrom AG), 2 mM l-glutamine, and penicillin (100 U/ml)/streptomycin (10 µg/ml) (PAA Laboratories) at 37°C and 10% (C2C12) or 5% CO2. Immortalized human myoblasts were cultured in skeletal muscle growth medium (Provitro) supplemented with supplement mix (Provitro), 50 ng/ml amphotericin, 50 µg/ml gentamicin, 10% FCS, 2 mM l-glutamine, and penicillin (100 U/ml)/streptomycin (10 µg/ml) at 37°C and 5% CO2. hFOBs (1.19) were cultured in a 1:1 mixture of DMEM and Ham’s F12 medium supplemented with 10% FCS, 2 mM l-glutamine, penicillin (100 U/ml)/streptomycin (10 µg/ml), and 0.3 mg/ml G418 (Biochrom AG) at 34°C with 5% CO2 to keep them in a proliferative state. HUVECs were a kind gift from M. Lorenz and V. Stangl (Charité Universitätsmedizin, Berlin, Germany) and cultured on gelatin-coated tissue culture ware in M199 medium supplemented with 20% FCS, 50 µg/ml endothelial cell growth supplement (Corning), 25 µg/ml heparin, 2 mM l-glutamine, and penicillin (100 U/ml)/streptomycin (10 µg/ml) at 37°C and 5% CO2. HUVECs were used at passage 3 in all experiments. Unless stated otherwise, all cells were starved for 5 h prior to stimulation with their respective growth medium, without FCS supplement, containing 2 mM l-glutamine and penicillin/streptomycin.
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4

Culturing Patient-Derived Glioblastoma Stem Cells

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Patient-derived glioblastoma stem-like cultures (NCH644 and NCH601) were kindly provided by Dr. Christel Herold-Mende (University of Heidelberg, Germany) and cultured as previously described (Campos et al., 2010 (link); Sanzey et al., 2015 (link)). In brief, NCH644 cells were maintained in neurobasal medium (Invitrogen, Carlsbad, California, USA) supplemented with 2% (v/v) ultraglutamine (Lonza, Basel, Switzerland), 1x B27 supplement (Lifetech, Carlsbad, California, USA), 1 U/ml heparin (Sigma Aldrich, St. Louis, Missouri, USA), 100 U/ml penicillin and 0.1 mg/ml streptomycin (Sigma Aldrich), 20 ng/ml epidermal growth factor (EGF) (Provitro, Berlin, Germany) and 20 ng/ml basic fibroblast growth factor (bFGF) (Milteny, Bergisch Gladbach, Germany). NCH601 cells were maintained in DMEM-F12 medium (Lonza) supplemented with 2% (v/v) ultraglutamine, 1x BIT100 supplement (Provitro), 1 U/ml heparin, 100 U/ml penicillin and 0.1 mg/ml streptomycin, 20 ng/ml EGF and 20 ng/ml bFGF. The cells were cultured in a humidified atmosphere at 5% CO2 and 37 °C and routinely checked for mycoplasma contamination using the MycoAlert mycoplasma detection kit (Lonza). The spheroids morphology was estimated with EVOS fl AMF-4306 AMG microscope (Westburg, Leusden, Netherlands).
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5

Chondrocyte Isolation and Culture

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Human chondrocytes from six different donors were bought from the company Provitro (Berlin, Germany). The cells were cultured in Chondrocyte Growth Medium (CGM; Provitro®, Berlin, Germany) supplemented with 10 % fetal calf serum (Provitro®, Berlin, Germany) and antibiotics -100 IU penicillin/ mL and 100 µg streptomycin/mL (Provitro®, Berlin, Germany). Chondrocytes of passage 3 grown in T25 cm 2 flasks (25 cm 2 ; Sarstedt, Nümbrecht, Germany) were used for the experiments. The procedure was described in detail in [6] .
For immunohistochemical studies, the cells were seeded in slide flasks (Thermo Fisher Scientific, Waltham, MA, USA) 24 h before the experiments (n=40 each group).
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6

Chondrocyte Culture and Preparation

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Human chondrocytes derived from hip joint cartilage were purchased from Provitro (Berlin, Germany). They were cultured in Chondrocyte Growth Medium (CGM; Provitro®, Berlin, Germany) supplemented with 10 % fetal calf serum (Provitro®, Berlin, Germany) and antibiotics -100 IU penicillin/mL and 100 μg streptomycin/mL (Provitro®, Berlin, Germany). The cells from frozen stocks (passage 1) were grown in T175 cell culture flasks (175 cm 2 ; Sarstedt, Nümbrecht, Germany) until sub-confluent layers were obtained. Afterwards, the cells were split (passage 2) in 5 T175 cell culture flasks and after reaching confluence 4 T175 were split (passage 3) in 80 T25 cell culture flasks (25 cm 2 ; Sarstedt, Nümbrecht, Germany) for the vibration experiments (n=40 for vibrated samples and n= 40 as 1g-control samples).
For histological investigations, the chondrocytes were seeded in slide flasks one day before the experiments (n=40 each group; Thermo Fisher Scientific, Waltham, MA, USA).
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