Figure 2From: Single cell mutational analysis of PIK3CA in circulating tumor cells and metastases in breast cancer reveals heterogeneity, discordance, and mutation persistence in cultured disseminated tumor cells from bone marrow Live DTCs captured by the MagSweeper and propagated in vitro. (A) DTCs detected in fresh smear of bone marrow aspirate among a background of red blood cells (RBCs) and white blood cells (WBCs) (left panel); unstained EpCAM-captured DTCs from bone marrow aspirate (right panel); small black circles are EpCAM-conjugated microbeads. (B) EpCAM-captured tumor cells (200×) grown in culture for three weeks: tumor cells proliferated days 1–4, but began changing shape on day 5. (C) Tumor cells identified by immunostaining at different timepoints during cell culture period (a = day 1; b-f = day 21 at 200×); upper panel 1 shows cell morphology by brightfield; middle panel 2 shows immunostain images (all cells were CK+, CD45- and DAPI+); lower panel 3 shows varying nuclear morphology of cells between day 1 day 21. Green = cytokeratin, red = CD45, blue = DAPI nuclear stain.Back to article page