Research Article

The Concept of Divergent Targeting through the Activation and Inhibition of Receptors as a Novel Chemotherapeutic Strategy: Signaling Responses to Strong DNA-Reactive Combinatorial Mimicries

Figure 6

Upregulation of ERCC1 expression in U87MG (a), U87/EGFR (b), and U87/EGFRvIII (c) glioma cells. Cells were treated with the indicated concentrations of Iressa, mechlorethamine (HN2), Iressa + HN2, ZRBA4, or ZR2003, alone or in combination with octreotide (OCT) for 48 h. Cell lysates (40 μg) were fractionated by SDS-PAGE and probed with anti-ERCC1 (1 : 1000) antibodies (see Materials and Methods for details). Blots were subsequently stripped and reprobed for α-actinin (1 : 1500). Major protein bands of 36 (ERCC1) and 100 kDa (α-actinin) were obtained.
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