Figure 2.
OCICs, under stem cell conditions, are highly resistant to conventional chemotherapies. A, sphere-forming OCICs from tumor T1, under stem cell—selective (black columns) or differentiating (white columns) conditions, were treated with cisplatin (CDDP;30 μmol/L; left), paclitaxel (Ptx;2 μmol/L; center), or cisplatin (30 μmol/L) and paclitaxel (2 μmol/L) for 3 h (CDDP + Ptx; right); cell survival was determined by MTT assays. B, same treatments as in A for OCICs derived from tumor T2, with white columns denoting differentiating conditions and black columns indicating stem cell conditions; *, P < 0.05; **, P < 0.01.