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7 protocols using recombinant hgf

1

HGF Stress Response in A549 Cells

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ER stressed A549 cells were treated with 1.6 ng/ml recombinant HGF from R&D Systems (Abingdon, UK).
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2

EpiSPC and rMC Co-culture Protocol

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Mono- or co-culture of EpiSPC and rMC was performed as described previously [30 ]. In brief, flow sorted cells were counted, resuspended and mixed with growth factor reduced matrix (BD Biosciences) diluted with EpiSPC medium (α-MEM, 10% FCS, 1x pen/strep, 1x insulin/transferrin/selenium, 2mM L-glutamine, 0.0002% heparin) at a 1:1 ratio. Cell suspensions were seeded in 12mm cell culture inserts (0.4μm pore size, Millipore) in a 24-well plate and incubated for 5 min at 37°C, 5% CO2 to allow gelling. EpiSPC medium was then added to the bottom wells of the plate. In selected experiments, 50ng/ml recombinant Fgf10 and 30ng/ml recombinant Hgf (both R&D systems) or anti-Fgf10 or control Ab were added to the medium at day 2 of culture. For matrix digestion a preheated dispase/collagenase I (Boehringer, Gibco) mixture (3 mg/ml) was added and a single cell suspension was obtained for re-seeding or single-cell sorting. Images were taken with a DM IL LED microscope and a corresponding camera MC170 HD (Leica).
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3

Cellular Stress Response Pathway Analysis

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Tunicamycin (TN), thapsigargin (TG), mouse anti-vimentin Cy 3 conjugated (#C5992), and mouse anti-pan cytokeratin FITC conjugated antibody (#C9080) were obtained from Sigma-Aldrich (St. Louis, MO). Anti-HGF affinity purified polyclonal antibody (#AF-294-SP) and recombinant HGF was purchased from R&D Systems (Abington U.K), and recombinant TGF-β1 was from MyBiosource Inc, (San Diego, USA).
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4

Analyzing MET and EGFR Signaling Pathways

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Primary antibodies used were anti-MET, anti-pMET, anti-EGFR, anti-pEGFR, anti-GAB1, anti-pGAB1, anti-AKT, anti-pAKT, anti-pERK1/2, (Cell Signaling Technology) and anti-β-actin (Sigma). The antibody arrays used were Proteome Profiler Human Phospho-Receptor Tyrosine Kinase (RTK) (ARY001B) and Phospho-Kinase Array (ARY003B) kits from R&D Systems. Recombinant HGF and pro-HGF were purchased from R&D Systems. The MET kinase inhibitor, JNJ38877605 was purchased from Selleck Chemicals (Selleckchem). HGF-specific and nonspecific (NSP) siRNAs were purchased from Dharmacon.
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5

3D Spheroid Formation and Imaging

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The 3D protocol described in [18 ] was used. Briefly, 1 × 104 cells were plated on 12 mm circular cover glasses coated with Matrigel Matrix Growth Factor Reduced (MMGFR) (BD Biosciences) with serum free Mammary Epithelial Cell Growth Medium (MEGM™) media (Lonza, Walkersville, MD) containing the BulletKit™ growth supplement (BPE, hydrocortisone, GA-1000, Insulin). An overlay of MEGM growth media containing 2% MMGFR was added 1 hr after seeding. Spheroids were allowed to form overnight before addition of 100 ng recombinant HGF (R&D Biosystems) or pro-HGF conditioned media for 24 hrs after which cells were stained with 5 uM Cell Tracker Orange (Invitrogen) for 45 min and Hoechst 33342 (Life Technologies Carlsbad, CA) for 5 min prior to imaging. Confocal images were acquired on the Zeiss LSM 780 scope at the Microscopy Imaging and Cytometry Resources Core at Wayne State University School of Medicine.
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6

HGF-Induced Growth Assay in NIH3T3 Cells

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NIH3T3 cells stably expressing wild-type or Asp153Tyr mutant MET were plated in complete medium. After 24 h, the medium was replaced with serum-free medium and cells were treated with the indicated concentration of recombinant HGF (R&D Systems). Cell growth was measured after 3 d with the CellTiter-Glo luminescence cell viability kit (Promega) as described previously98 (link). Student's t test (two-tailed) was used for statistical analyses to compare treatment groups with GraphPad Prism 5.00. A P value of <0.05 was considered statistically significant (*P < 0.05 and **P < 0.01).
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7

Recombinant HGF Dose-Dependent Proliferation

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Recombinant HGF (R&D Systems, Minneapolis, MN) was added to Pan02 (n = 5 repeat experiments) and TGP-47 cells (n = 4 repeat experiments) plated as described above, at the following doses: 0, 0.1, 1, 10, and 100 ng/ml. After 24 h of growth, the MTT proliferation assay was performed as above.
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