Targeting TNBC: core-shell polycationic polyurea dendrimers with inherent anticancer activity

Area of Science:

• Nanotechnology
• Oncology
• Materials Science

Background:

• Breast carcinoma (BC) is a prevalent cancer in women, with triple-negative breast cancer (TNBC) representing a significant subset.
• TNBC lacks targeted therapies and exhibits poor prognosis due to late detection and metastasis.
• Dendrimers, with their unique globular architecture, offer potential for targeted cancer therapy by interacting with cell membranes.

Purpose of the Study:

• To evaluate the anticancer efficacy of two novel polycationic polyurea (PURE) dendrimers, PURE_G4-OEI₄₈ and PURE_G4-OCEI₂₄, against breast cancer.
• To investigate the selective targeting and therapeutic mechanisms of these dendrimers on TNBC cells.

Main Methods:

• Synthesis and characterization of PURE_G4-OEI₄₈ and PURE_G4-OCEI₂₄ dendrimers.
• In vitro assessment of dendrimer interaction with TNBC cell lines, including induction of apoptosis, necroptosis, and ferroptosis.
• In vivo evaluation of dendrimer efficacy and toxicity in a mouse xenograft model (HCC1806).

Main Results:

• Both PURE dendrimers demonstrated selective interaction with TNBC cells.
• Induction of multiple cell death pathways (apoptosis, necroptosis, ferroptosis) was observed in vitro.
• In vivo studies showed significant reduction in tumor volume in HCC1806 xenografts.
• PURE_G4-OEI₄₈ exhibited no observable toxicity, while PURE_G4-OCEI₂₄ caused mild hepatic toxicity.

Conclusions:

• PURE dendrimers represent a promising therapeutic strategy for TNBC.
• Further research and modifications are warranted to optimize dendrimer efficacy and minimize potential toxicity for clinical translation.