Abstract
In this paper we have simulated an in vitro lung cancer microenvironment by dielectrophoresis (DEP) patterning. Heterogeneous cells were patterned on the glass substrate, above which a microfluidic gradient is integrated to generate different concentration of target therapy drug (Iressa). Taking advantage of DEP pattern and microfluidic gradient, we designed a biochip to mimic the in vivo conditions. The influence of drug treatment for cell patterning is better than the non-patterned case as visualized in cell viability rate by MTT assay.