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Robertus CM, Snyder SM, Curley SM, Murundi SD, Whitman MA, Fischbach C, Putnam D. Selective Accumulation of Near Infrared-Labeled Multivalent Quinidine Copolymers in Tumors Overexpressing P-Glycoprotein: Potential for Noninvasive Diagnostic Imaging. ACS Appl Bio Mater 2023; 6:3117-3130. [PMID: 37498226 DOI: 10.1021/acsabm.3c00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
P-glycoprotein (P-gp) is a promiscuous small molecule transporter whose overexpression in cancer is associated with multidrug resistance (MDR). In these instances, anticancer drugs can select for P-gp-overexpressing cells, leading to cancer recurrence with an MDR phenotype. To avoid selection for MDR cancers and inform individual patient treatment plans, it is critical to noninvasively identify P-gp-overexpressing tumors prior to administration of chemotherapy. We report the facile free radical copolymerization of quinidine, a competitive inhibitor of P-gp, and acrylic acid to generate multiplexed polymeric P-gp-targeted imaging agents with tunable quinidine content. Copolymer targeting was demonstrated in a nude mouse xenograft model. In xenografts overexpressing P-gp, copolymer distribution was enhanced over two-fold compared to the negative control of poly(acrylic acid) regardless of quinidine content. In contrast, accumulation of the copolymers in xenografts lacking P-gp was equivalent to poly(acrylic acid). This work forms the foundation for a unique approach toward the phenotype-specific noninvasive imaging of MDR tumors and is the first in vivo demonstration of copolymer accumulation through the active targeting of P-gp.
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Affiliation(s)
- Cara M Robertus
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
| | - Sarah M Snyder
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
| | - Stephanie M Curley
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
| | - Shamanth D Murundi
- Department of Biological and Environmental Engineering, Cornell University, 111 Wing Drive, Ithaca, New York 14853-0001, United States
| | - Matthew A Whitman
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
| | - Claudia Fischbach
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, 245 Feeney Way, Ithaca, New York 14853, United States
| | - David Putnam
- Meinig School of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, New York 14853-0001, United States
- Smith School of Chemical and Biomolecular Engineering, Cornell University, 113 Ho Plaza, Ithaca, New York 14853, United States
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