Article ; Online: BCMA-targeted bortezomib nanotherapy improves therapeutic efficacy, overcomes resistance, and modulates the immune microenvironment in multiple myeloma.
2023 Volume 13, Issue 1, Page(s) 184
Abstract: Bortezomib (BTZ) is a standard-of-care treatment in multiple myeloma (MM); however, adverse side effects and development of resistance limit its long term benefit. To improve target specificity, therapeutic efficacy, and overcome resistance, we designed ... ...
Abstract | Bortezomib (BTZ) is a standard-of-care treatment in multiple myeloma (MM); however, adverse side effects and development of resistance limit its long term benefit. To improve target specificity, therapeutic efficacy, and overcome resistance, we designed nanoparticles that encapsulate BTZ and are surface-functionalized with BCMA antibodies (BCMA-BTZ-NPs). We confirmed efficient cellular internalization of the BCMA-BTZ-NPs only in BCMA-expressing MM cells, but not in BCMA-knockout (KO) cells. In addition, BCMA-BTZ-NPs showed target-specific cytotoxicity against MM cell lines and primary tumor cells from MM patients. The BCMA-BTZ-NPs entered the cell through receptor-mediated uptake, which escapes a mechanism of BTZ resistance based on upregulating P-glycoprotein. Furthermore, BCMA-BTZ-NPs induced cell death more efficiently than non-targeted nanoparticles or free BTZ, triggering potent mitochondrial depolarization followed by apoptosis. In BTZ-resistant cells, BCMA-BTZ-NPs inhibited proteasome activity more effectively than free BTZ or non-targeted nanoparticles. Additionally, BCMA-BTZ-NPs enhanced immunogenic cell death and activated the autophagic pathway more than free BTZ. Finally, we found that BCMA-BTZ-NPs selectively accumulated at the tumor site in a murine xenograft model, enhanced tumor reduction, and prolonged host survival. These results suggest BCMA-BTZ-NPs provide a promising therapeutic strategy for enhancing the efficacy of BTZ and establish a framework for their evaluation in a clinical setting. |
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MeSH term(s) | Humans ; Animals ; Mice ; Bortezomib/pharmacology ; Bortezomib/therapeutic use ; Multiple Myeloma/pathology ; B-Cell Maturation Antigen ; Drug Resistance, Neoplasm ; Cell Line, Tumor ; Antineoplastic Agents/pharmacology ; Antineoplastic Agents/therapeutic use ; Tumor Microenvironment |
Chemical Substances | Bortezomib (69G8BD63PP) ; B-Cell Maturation Antigen ; Antineoplastic Agents |
Language | English |
Publishing date | 2023-12-11 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 2600560-8 |
ISSN | 2044-5385 ; 2044-5385 |
ISSN (online) | 2044-5385 |
ISSN | 2044-5385 |
DOI | 10.1038/s41408-023-00955-y |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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