Abhjeet S Bhullar, Kai Jin, Haizhu Shi, Austen Jones, Dalton Hironaka, Gaofeng Xiong, Ren Xu, Peixuan Guo, Daniel W Binzel, Dan Shu
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引用次数: 0
Abstract
Triple-negative breast cancer (TNBC) is an aggressive subtype of breast cancer that has no therapeutic targets, relies on chemotherapeutics for treatment, and is in dire need of novel therapeutic approaches for improved patient outcomes. Extracellular vesicles (EVs) serve as intercellular communicators and have been proposed as ideal drug delivery vehicles. Here, EVs were engineered with RNA nanotechnology to develop TNBC tumor inhibitors. Using super resolved-structured illumination microscopy, EVs were optimized for precise Survivin small interfering RNA (siRNA) conjugated to chemotherapeutics loading and CD44 aptamer ligand decoration, thereby enhancing specificity toward TNBC cells. Conventional treatments typically employ chemotherapy drugs gemcitabine (GEM) and paclitaxel (PTX) at dosages on the order of mg/kg respectively, per injection (intravenous) in mice. In contrast, engineered EVs encapsulating these drugs saw functional tumor growth inhibition at significantly reduced concentrations: 2.2 μg/kg for GEM or 5.6 μg/kg for PTX, in combination with 21.5 μg/kg survivin-siRNA in mice. The result is a substantial decrease in the chemotherapeutic dose required, by orders of magnitude, compared with standard regimens. In vivo and in vitro evaluations in a TNBC orthotopic xenograft mouse model demonstrated the efficacy of this decreased dosage strategy, indicating the potential for decreased chemotherapy-associated toxicity.
期刊介绍:
Molecular Therapy is the leading journal for research in gene transfer, vector development, stem cell manipulation, and therapeutic interventions. It covers a broad spectrum of topics including genetic and acquired disease correction, vaccine development, pre-clinical validation, safety/efficacy studies, and clinical trials. With a focus on advancing genetics, medicine, and biotechnology, Molecular Therapy publishes peer-reviewed research, reviews, and commentaries to showcase the latest advancements in the field. With an impressive impact factor of 12.4 in 2022, it continues to attract top-tier contributions.