Label free technology: the weird and wonderful world of cell signaling

Whilst conducting an evaluation of label free technology platforms we
encountered a number of surprising, but reproducible, observations. For
example, receptor over-expression impacts endogenous signaling
responses; surface coatings affecting cell adherence can change the
response profile; and it is important to choose the appropriate analysis
metric for complex profiles. Awareness of the subtleties of cell signaling
within model systems such as CHO and HEK recombinant over-expression
systems is essential for understanding how small molecules interacting with
the pathways are exerting their effects.