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3D Printed Programmable Release Capsules

Author(s): Gupta, Maneesh K; Meng, Fanben; Johnson, Blake N; Kong, Yong Lin; Tian, Limei; et al

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Abstract: The development of methods for achieving precise spatiotemporal control over chemical and biomolecular gradients could enable significant advances in areas such as synthetic tissue engineering, biotic–abiotic interfaces, and bionanotechnology. Living organisms guide tissue development through highly orchestrated gradients of biomolecules that direct cell growth, migration, and differentiation. While numerous methods have been developed to manipulate and implement biomolecular gradients, integrating gradients into multiplexed, three-dimensional (3D) matrices remains a critical challenge. Here we present a method to 3D print stimuli-responsive core/shell capsules for programmable release of multiplexed gradients within hydrogel matrices. These capsules are composed of an aqueous core, which can be formulated to maintain the activity of payload biomolecules, and a poly(lactic-co-glycolic) acid (PLGA, an FDA approved polymer) shell. Importantly, the shell can be loaded with plasmonic gold nanorods (AuNRs), which permits selective rupturing of the capsule when irradiated with a laser wavelength specifically determined by the lengths of the nanorods. This precise control over space, time, and selectivity allows for the ability to pattern 2D and 3D multiplexed arrays of enzyme-loaded capsules along with tunable laser-triggered rupture and release of active enzymes into a hydrogel ambient. The advantages of this 3D printing-based method include (1) highly monodisperse capsules, (2) efficient encapsulation of biomolecular payloads, (3) precise spatial patterning of capsule arrays, (4) “on the fly” programmable reconfiguration of gradients, and (5) versatility for incorporation in hierarchical architectures. Indeed, 3D printing of programmable release capsules may represent a powerful new tool to enable spatiotemporal control over biomolecular gradients.
Publication Date: 4-Jun-2015
Citation: Gupta, Maneesh K., Fanben Meng, Blake N. Johnson, Yong Lin Kong, Limei Tian, Yao-Wen Yeh, Nina Masters, Srikanth Singamaneni, and Michael C. McAlpine. "3D printed programmable release capsules." Nano letters 15, no. 8 (2015): 5321-5329. doi: 10.1021/acs.nanolett.5b01688
DOI: doi:10.1021/acs.nanolett.5b01688
ISSN: 1530-6984
EISSN: 1530-6992
Pages: 5321 - 5329
Type of Material: Journal Article
Journal/Proceeding Title: Nano Letters
Version: Author's manuscript

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