Fig. 4. HCS strategies in 3D cell culture system.
(A) In-cell immunofluorescence assay of biomarkers (target proteins) in 3D cell culture on the microarray chip [34, 64]. (B) Micropillar/microwell chip platform for RNAi delivery into 3D cell culture [64]. The micropillar chip can be transferred to a microwell chip containing a target compound after incubation with lentiviruses carrying the RNAi library.