Prior to the plaque assay, three freeze-and-thaw cycles were completed to achieve a thorough cell lysis.
These include the use of high-salt buffers that are not compatible with electroporation conditions and may lead to arcing; the presence of contaminating (unreacted) dye in stock protein samples; and the presence of non-internalized fluorescent molecules that persist in the cell suspension even after thorough cell washing.
The cell pellet was resuspended in guanidine lysis buffer (6 M guanidine hydrochloride, 500 mM sodium chloride, and 20 mM sodium phosphate, pH 7.8) and rocked slowly for 5 to 10 min at room temperature to ensure thorough cell lysis, followed by sonication on ice with three 5-second pulses (high intensity).
In the early nineties, mRNAs whose levels oscillated as yeast cells progressed thorough the cell cycle were identified (Price et al. 1991).
After thorough washing, cells were incubated with fluorescent secondary antibodies for 30 min on ice.
After washing with PBS containing 2% heat inactivated human AB serum, 1% BSA and 0.1% NaN3, cells were incubated with PE-labeled anti-human CD14 (monocytes) or anti-human CD3 (T lymphocytes) antibodies for 20 min. After thorough washing, cells were analyzed by flow cytometry (FACSCalibur, BD).
After thorough washing, cells were counted using a Neubauer chamber.
After thorough washing, cells were incubated with a 1 500 dilution of Alexa Fluor 488-conjugated goat anti-mouse IgG antibody (Invitrogen - Molecular Probes, Eugene, OR) for 30 minutes at room temperature in the dark.
Following thorough washing, cells were incubated with Dylight-488 anti-rabbit secondary antibody (Thermo-Fisher ScILntific Ltd, Rockford, IL, USA; diluted 1 : 100 with PBS) for 45 min at room temperature, and then 4′6-diamidino-2-phenylindole dichloride (DAPI) for a further 30 min at room temperature.
More recently it was demonstrated that for thorough Th-cell differentiation, in addition to activation of a specific STAT by polarizing cytokines, a further cytokine signal provided by an IL-1 family member is required 52, and that IL-33 supports the IL-2/STAT5A-signaling pathway in generating high amounts of Th2 cytokines.
The ECM composition of the FGF2-treated fibroblasts favors the pro-regenerative outcome in the wound site directly by affecting the balance between scar formation and tissue regeneration and potentially thorough changes in cell attachment to ECM, cell migration, and cell proliferation.
