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Petromyzontidae-Biomimetic Multimodal Microneedles-Integrated Bioelectronic Catheters for Theranostic Endoscopic Surgery

机译:Petromyzontidae-Biomimetic Multimodal Microneedles-Integrated Bioelectronic Catheters for Theranostic Endoscopic Surgery

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摘要

Current catheter devices in minimally invasive surgery still possess limitedfunctional options, lacking multimodal integration of both sensing andtherapy. Catheter devices usually operate outside the tissue, incapable todetect intra-tissue biochemical information for accurate localization andassessment of lesions during surgery. Inspired by the feature and functions ofPetromyzontidae, here a multimodal core-shell microneedles-integrated bioelectroniccatheter (MNIBC) for tissue-penetrating theranostics in endoscopicsurgery is developed. The microneedle (MN) device possesses individuallyaddressable functionality at single-MN tip resolution, enabling multiplexfunctions (a total of 11 functions distributed in three types of catheters)including biochemical sensing, myoelectric modulation, electroporation, anddrug delivery in a submucosal environment. The MNIBC is prepared throughhybrid fabrication and dimensionality reduction strategies, where the MNelectrodes are functionalized with an MXene-carbon nanotube (MXene-CNT)-based electron mediator, addressing the challenge of reduced electrode sensitivityon ultra-small MN tip. The functionalities of MNIBC are demonstratedboth ex vivo and in vivo on anesthetized rabbits via laparoscopy, simulatedcystoscopy, and laparotomy. The MNIBC can effectively detect intra-tissuebiochemical signals in the bladder, and offers localized electroporation andintra-tissue drug delivery for precise treatments of lesions. The versatile featuresof the MNIBC present a highly advanced platform for precise surgeries.

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