Is it okay to stain cells for both intercellular and surface markers for FACS analysis?
Posted April 24, 2020
Yes, it is possible to perform both intracellular and surface staining on the same cells; however, they should not be done in the same step. This is because the fixation and permeabilization that is necessary for intracellular staining may decrease the signal of surface antigens. Therefore, it is best to perform surface staining first before fixing and permeabilizing the cell for intracellular staining.
Krutzik, P.O., Clutter, M. R., & Nolan, G. P. (2005). Coordinate analysis of murine immune cell surface markers and intracellular phosphoproteins by flow cytometry. Journal of immunology, 175(4), 2357-2365. doi:10.4049/jimmunol.175.4.2357