3D culture boosting fullerenol nanoparticles to induce calreticulin exposure on MCF-7 cells for enhanced macrophage-mediated cell removal.

Abstract

Calreticulin (CRT) on the cell surface that acts as an "eat me" signal is vital for macrophage-mediated programmed cell removal. The polyhydroxylated fullerenol nanoparticle (FNP) has appeared as an effective inducer to cause CRT exposure on cancer cell surface, but it failed in treating some cancer cells such as MCF-7 cells based on previous findings. Here, we carried out the 3D culture of MCF-7 cells, and interestingly found that the FNP induced CRT exposure on cells in 3D spheres via re-distributing CRT from endoplasmic reticulum (ER) to cell surface. Phagocytosis experiments in vitro and in vivo illustrated the combination of FNP and anti-CD47 monoclonal antibody (mAb) further enhanced macrophage-mediated phagocytosis to cancer cells. The maximal phagocytic index in vivo was about three times higher than that of the control group. Moreover, in vivo tumorigenesis experiments in mice proved that FNP could regulate the progress of MCF-7 cancer stem-like cells (CSCs). These findings expand the application of FNP in tumor therapy of anti-CD47 mAb and 3D culture can be used as a screening tool for nanomedicine.

• Authors: Sen Liu, Haojun Liang, Linwen Lv, Fan Hu, Qiuyang Liu, Yujiao Wang, Junyu Zhu, Ziteng Chen, Jiacheng Li, Zhijie Wang, Ya-Nan Chang, Juan Li, Xiancai Ma, Kui Chen, Gengmei Xing
• Journal: Colloids and surfaces. B, Biointerfaces (Colloids Surf B Biointerfaces) Vol. 224 Pg. 113204 (Apr 2023) ISSN: 1873-4367 [Electronic] Netherlands
• PMID: 36801743 (Publication Type: Journal Article)
• Copyright: Copyright © 2023 Elsevier B.V. All rights reserved.

Chemical References

• fullerenol
• Calreticulin
• Antineoplastic Agents

Topics

• Humans
• Mice
• Animals
• MCF-7 Cells
• Calreticulin (metabolism)
• Macrophages (metabolism)
• Phagocytosis
• Antineoplastic Agents (pharmacology)
• Nanoparticles