Fig. 1

Representative CI versus time-course curves for basic cell attachment. Human breast cancer BT474 cells (a) or R56 patient-derived primary breast tumor cells (b) were seeded in a sensor plate and allowed to adhere, spread, and proliferate. Impedance was recorded as Cell Index (CI) versus time for 100 h after seeding. Cell attachment, stabilization, proliferation, and confluent phases are shown as indicated. c Representative images captured by an inverted phase contrast microscope (magnification: X40) showing cell morphology of BT474 and breast cancer R56 primary cells. Scale bar, 100 μm