Title : Dual-Receptor-Targeted (DRT) Radiation Nanomedicine Labeled with 177Lu Is More Potent for Killing Human Breast Cancer Cells That Coexpress HER2 and EGFR Than Single-Receptor-Targeted (SRT) Radiation Nanomedicines.

Pub. Date : 2020 Apr 6

PMID : 32022567






8 Functional Relationships(s)
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1 Specific binding to HER2 and/or EGFR was assessed by incubating BC cells with DRT AuNP-177Lu or TmAb-AuNP-177Lu or PmAb-AuNP-177Lu or NT-AuNP-177Lu in the absence or presence of an excess of TmAb or PmAb or both competitors. Gold epidermal growth factor receptor Homo sapiens
2 Specific binding to HER2 and/or EGFR was assessed by incubating BC cells with DRT AuNP-177Lu or TmAb-AuNP-177Lu or PmAb-AuNP-177Lu or NT-AuNP-177Lu in the absence or presence of an excess of TmAb or PmAb or both competitors. Gold epidermal growth factor receptor Homo sapiens
3 Specific binding to HER2 and/or EGFR was assessed by incubating BC cells with DRT AuNP-177Lu or TmAb-AuNP-177Lu or PmAb-AuNP-177Lu or NT-AuNP-177Lu in the absence or presence of an excess of TmAb or PmAb or both competitors. Gold epidermal growth factor receptor Homo sapiens
4 Specific binding to HER2 and/or EGFR was assessed by incubating BC cells with DRT AuNP-177Lu or TmAb-AuNP-177Lu or PmAb-AuNP-177Lu or NT-AuNP-177Lu in the absence or presence of an excess of TmAb or PmAb or both competitors. Gold epidermal growth factor receptor Homo sapiens
5 DRT AuNP-177Lu were specifically bound by BC cells that expressed HER2 or EGFR or both receptors. Gold epidermal growth factor receptor Homo sapiens
6 In contrast, SRT TmAb-AuNP-177Lu and PmAb-AuNP-177Lu were bound and internalized only by BC cells that expressed HER2 or EGFR, respectively. Gold epidermal growth factor receptor Homo sapiens
7 Importantly, DRT AuNP-177Lu were more potent in vitro than PmAb-AuNP-177Lu for killing MDA-MB-231-H2N cells that co-express HER2 and EGFR (CS= 18.8 +- 1.0% vs. 51.5 +- 10.4%; P=0.006). Gold epidermal growth factor receptor Homo sapiens
8 Furthermore, DRT AuNP-177Lu were more potent for killing BT-474 cells with high HER2 but low EGFR expression than TmAb-AuNP-177Lu (CS= 8.9 +- 3.3% vs. 20.7 +- 2.4%; P=0.007) or PmAb-AuNP-177Lu (CS=63.9 +- 1.7%; P<0.0001). Gold epidermal growth factor receptor Homo sapiens