EGFR and breast carcinoma: CTX binds with high affinity and blocks the EGFR, which is overexpressed in several cancer cells.10 CTX-conjugated NPs have been widely used for the specific targeting of different kinds of cancer cells overexpressing EGFR, including lungs,11–13 gastric,14 colon,15–17 brain,18–20 and breast cancers.21–23