A redox-responsive nanosystem to suppress chemoresistant lung cancer through targeting STAT3.

Abstract

Cancer stem cells (CSCs) have been demonstrated to be involved in tumor initiation and relapse, and the presence of CSCs in the tumor tissue often leads to therapeutic failure. BBI608 has been identified to eliminate CSCs by inhibiting signal transducer and activator of transcription 3 (STAT3). In this study, we confirm that BBI608 can efficiently suppress the proliferation and migration of non-small cell lung cancer (NSCLC) cells, and specifically kill the stemness-high population in chemoresistant NSCLC cells. To improve its bioavailability and tumor accumulation, BBI608 is successfully encapsulated into redox-responsive PEGylated branched N-(2-hydroxypropyl) methacrylamide (HPMA)-deoxy cholic acid (DA) polymeric nanoparticles (BBI608-SS-NPs). The BBI608-SS-NPs can release the drug in response to high concentrations of intracellular glutathione, and exhibit cytotoxicity against lung cancer cells and CSCs comparable to the free drug BBI608. Furthermore, the BBI608-SS-NPs preferentially accumulate in tumor sites, resulting in a superior anti-tumor efficacy in both cisplatin-resistant cell line-derived xenograft (CDX) and patient-derived xenograft (PDX) models of NSCLC. Mechanistic studies demonstrate that BBI608-SS-NPs not only directly inhibit the downstream genes of the STAT3 pathway, but also indirectly inhibit the Wnt pathway. Overall, this stimuli-responsive polymeric nanoformulation of BBI608 shows great potential in the treatment of chemoresistant NSCLC by targeting CSCs.

• Authors: Qiyi Feng, Jie Chen, Jinxing Huang, Xiaojie Li, Xinyi Liu, Chunxiu Xiao, Xiuli Zheng, Xuanming Chen, Jue Li, Zhongwei Gu, Kui Luo, Kai Xiao, Weimin Li
• Journal: Journal of controlled release : official journal of the Controlled Release Society (J Control Release) Vol. 363 Pg. 349-360 (11 2023) ISSN: 1873-4995 [Electronic] Netherlands
• PMID: 37748583 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2023 Elsevier B.V. All rights reserved.

Chemical References

• napabucasin
• STAT3 Transcription Factor
• STAT3 protein, human

Topics

• Humans
• Lung Neoplasms (pathology)
• Carcinoma, Non-Small-Cell Lung (metabolism)
• STAT3 Transcription Factor (metabolism)
• Oxidation-Reduction
• Cell Proliferation
• Cell Line, Tumor
• Neoplastic Stem Cells (metabolism)