Cancer Cell Membrane-Camouflaged Nanorods with Endoplasmic Reticulum Targeting for Improved Antitumor Therapy.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Therapy

Background:

• Cell membrane-coated nanocarriers offer improved drug delivery but often overlook shape-dependent functionalities.
• Living organisms exhibit diverse shapes influencing biological interactions and therapeutic outcomes.

Purpose of the Study:

• To develop and compare cancer cell membrane (CCM)-coated nanospheres and nanorods for enhanced drug delivery.
• To investigate the impact of nanoparticle shape on cellular uptake, intracellular trafficking, and antitumor efficacy.

Main Methods:

• Fabrication of CCM-coated nanospheres (CSs) and nanorods (CRs).
• Evaluation of cellular uptake mechanisms (caveolin-mediated pathway).
• Assessment of intracellular drug distribution (doxorubicin to ER and nucleus).
• In vivo studies in tumor-bearing mice to evaluate immune escape, extracellular matrix penetration, and tumor accumulation.

Main Results:

• CCM-coated nanorods (CRs) exhibited higher endocytosis efficiency than CSs.
• CRs effectively delivered doxorubicin to the nucleus, inducing endoplasmic reticulum stress and apoptosis.
• CRs demonstrated superior immune escape, 8.2-fold greater extracellular matrix penetration, and enhanced tumor accumulation compared to CSs.
• CRs significantly improved antitumor efficacy in vivo.

Conclusions:

• Nanoparticle shape is a critical design parameter for optimizing cell membrane-based drug delivery systems.
• Rod-shaped nanocarriers show enhanced capabilities for subcellular targeting and effective tumor therapy.