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Poly l ornithine

Manufactured by Corning
Sourced in United States

Poly-L-Ornithine is a synthetic polymer of the amino acid L-ornithine. It is commonly used as a cell culture coating to promote cell attachment and growth in various cell types.

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3 protocols using poly l ornithine

1

Shh-Responsive Luciferase Assay

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24-well tissue culture plates were coated with 1X Poly-L-Ornithine (Corning Inc., Lowell, MA, 25–055-CV). 2.5×105 Shh-LIGHT2 cells17 (link) were plated per well in 500µl media containing DMEM with 10%FBS and 1% P/S. 24 hours later, cells were changed to DMEM with 0.5% FBS and transduced with red fluorescent protein (RFP)-tagged control (RFP-CTRL) or yellow fluorescent protein (YFP)-tagged WIP1 (YFP-WIP1) lentivirus. 24 hours later, cells were stimulated with vehicle or Shh (3µg/mL) for 24 hours. Luciferase activity was assayed using the Dual Luciferase Reporter Assay System (Promega, Madison, WI, # E1910), according to manufacturer’s instructions.
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2

Shh-Responsive Luciferase Assay

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24-well tissue culture plates were coated with 1X Poly-L-Ornithine (Corning Inc., Lowell, MA, 25–055-CV). 2.5×105 Shh-LIGHT2 cells17 (link) were plated per well in 500µl media containing DMEM with 10%FBS and 1% P/S. 24 hours later, cells were changed to DMEM with 0.5% FBS and transduced with red fluorescent protein (RFP)-tagged control (RFP-CTRL) or yellow fluorescent protein (YFP)-tagged WIP1 (YFP-WIP1) lentivirus. 24 hours later, cells were stimulated with vehicle or Shh (3µg/mL) for 24 hours. Luciferase activity was assayed using the Dual Luciferase Reporter Assay System (Promega, Madison, WI, # E1910), according to manufacturer’s instructions.
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3

Time-lapse Microscopy of NSPC Proliferation

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For time-lapse video microscopy, the neurospheres were dissociated as described in section “2.4 Differentiation and proliferation assay under differentiation conditions.” The NSPCs were plated in a density of 30000 cells per well on poly-L-ornithine (15 μg/ml) coated 24 well plates (Corning, Corning, NY, USA, Cat# 353226) in neurosphere medium. After 2 h, the cells adhered and the medium was supplemented with EGF, FGF2 and heparin in the same concentrations as in the neurosphere culture to ensure proliferation conditions. For the analysis, the produced FnIII Fc recombinants were presented to the cells as coated substrates or as soluble medium additives, both with a concentration of 25 μg/ml. A total of 2 h after seeding the plate was placed in the video microscope system of an Axiovert 200 M provided with an AxioCam HRm and AxioVision-4.8.1 software (Carl Zeiss, Oberkochen, Germany). Additionally, two regulating elements, namely the “Tempcontrol 37-2 digital” and the “CTI-Controller 3700 digital” (PeCon GmbH, Erbach, Germany) ensured stable temperature and pH conditions. Within the system the cells were cultured at 37°C and 5% CO2. For analysis, five spots per domain combination were chosen and a picture was taken every 6 min for 96 h.
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