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5 protocols using pdgf dd

1

PDGF-DD Stimulation of NK Cells

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IL-2 cultured human NK cells were incubated with 250 ng/ml PDGF-DD (R&D Systems) in 24-well plates for 16h in the presence of 1 μg/ml IgG1 (NKDD+IgG sup) or blocking anti-NKp44 3.43.14 mAb (NKDD+α-NKp44 sup). After 16h, supernatants were pooled, centrifuged and filtered to remove cellular debris, and then stored at −80°C until further use. B16-pMX and B16-PDGFD stable cell-lines were cultured in 6-well plates for 72h. After 72h, supernatants were centrifuge, filtered and then stored at +4°C until further use.
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2

HASMC Migration Modulation by PDGF-DD

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Human aortic smooth muscle cells (HASMC) were plated at 8000 cells per well in upper chamber of 96-well transmigration plates from Incucyte (cat # 4648) and left to attach and spread for 30 hours. Cells were then washed with serum free media 2 times and incubated in serum free media for 12 hours. PDGF-DD (R&D systems, #1159-SB) was solubilized in 4mM HCl (Vehicle). PDGF-DD (17.85nM) was preincubated for 20 mins with or without anti-PDGF-DD antibody 25E17 (35.7nM) in serum free medium. PDGF-DD with or without antibody was added to the lower chamber of transmigration plates. Vehicle was added in control wells. Live cell migration was measured with the Incucyte Live-Cell Analysis system (Essen Bioscience). All data is expressed as the mean ± standard error of the mean (SEM). Statistical analysis performed using a repeated measures one-way ANOVA with Tukey correction.
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3

Quantification of PDGF-DD in TGF-β-treated MRC5 cells

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An ELISA kit was obtained to measure concentrations of PDGF-DD (R&D systems) in supernatants of MRC5 cells cultured in the absence or presence of TGFβ (4 ng/ml) for 24 h. The detection limit of this assay was 1.67 pg/ml.
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4

PDGF-DD Modulates HASMC Proliferation

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Human aortic smooth muscle cells (HASMC) were plated at 5000 cells per well in 96-well plates and left to attach and spread for 30 hours. Cells were then washed with serum free media 2 times and incubated in serum free media for 6 hours. PDGF-DD (R&D systems, #1159-SB) was solubilized in 4mM HCl (Vehicle). PDGF-DD (17.85nM) was preincubated for 20 mins with or without anti-PDGF-DD antibody 25E17 (35.7nM) in serum free medium. Cells were treated with PDGF-DD with or without antibody in serum free media. Vehicle was added in control wells. Live cell proliferation was measured with the Incucyte Live-Cell Analysis system (Essen Bioscience). All data is expressed as the mean ± standard error of the mean (SEM). Statistical analysis performed using a repeated measures one-way ANOVA with Tukey correction.
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5

Chemotactic migration of cells

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We used recombinant human bone morphogenetic protein-2 (BMP-2; Medtronic, Minneapolis, MN, USA), hepatocyte growth factor (HGF; Peprotech, Rocky Hill, NJ, USA), insulin-like growth factor-1 (IGF-1; Peprotech), platelet-derived growth factor-AA (PDGF-AA; R&D Systems), PDGF-AB (R&D Systems), PDGF-BB (R&D Systems), PDGF-CC (R&D Systems), PDGF-DD (R&D Systems), stromal cell-derived factor-1α (SDF-1α; R&D Systems), transforming growth factor-β3 (TGF-β3; Miltenyi Biotec, Bergisch Gladbach, Germany). The medium containing 0.5% FBS in the lower chamber was supplemented with 100 ng/mL BMP-2, 100 ng/mL HGF, 100 ng/mL IGF-1, 10 ng/mL PDGF-BB, 100 ng/mL SDF-1α, or 10 ng/mL TGF-β3. After 48 h incubation, migrated cells were counted. The PDGF isoforms were compared by adding PDGF-AA, AB, BB, CC, or DD to the lower chamber at 100 ng/mL. Crenolanib (Selleck Chemicals, Houston, TX, USA), an inhibitor of PDGF receptor (PDGFR) α and β, was added to both the upper and lower chambers during the migration assay.
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