For experiments, PC-12 cells were collected via 0.25% trypsin (Gibco) and seeded for culturing in collagen IV (Sigma-Aldrich) coated 4-chamber slides (Nunc Lab-Tek, Merck). PC-12 cells grew as small clusters in suspension and were maintained in a density 5 × 105 cells/ml in culture flasks coated by 0. If you beloved this article and you would like to get far more info relating to manufacturer of sialic acid powder for food Ingredients kindly go to our own web site. 1% collagen type IV (Sigma-Aldrich). For testing bioactivity of polySia avDP20, murine embryonic stem cell-derived microglia (ESdM) cells were seeded in 1.