Light-Triggered Specific Cancer Cell Release from Cyclodextrin/Azobenzene and Aptamer-Modified Substrate

Bian, Qing; Wang, Wenshuo; Wang, Shutao; Wang, Guojie

doi:10.1021/acsami.6b09734

Cited by 93 publications

(64 citation statements)

References 51 publications

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“…For example, most of the complicated supramolecular architectures, such as rotaxanes, catenanes, molecular shuttles, molecular switches, molecular machines, supramolecular polymers, supramolecular amphiphiles, and so on, are based on the host−guest chemistry of these macrocycles. They have been also employed to modify the surface properties of metal nanoparticles via noncovalent host−guest interactions, covering their applications in drug delivery, highly sensitive sensors, selective catalysis, and so on.…”

Section: Introductionmentioning

confidence: 99%

Supramolecular‐Macrocycle‐Based Crystalline Organic Materials

et al. 2019

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macrocycles. They have been also employed to modify the surface properties of metal nanoparticles via noncovalent host−guest interactions, [31] covering their applications in drug delivery, [32] highly sensitive sensors, [33] selective catalysis, [34] and so on.In addition to their intensive applications based on their host−guest chemistry, macrocycles have also been used as building blocks to construct solid materials including porous organic polymers (POPs), [35,36] metal-organic frameworks (MOFs), [37][38][39][40][41][42][43] and crystalline organic materials (COMs). [44][45][46][47][48][49][50][51][52][53][54][55][56][57] Particular attention should be paid to COMs, a class of organic materials featuring facile preparation, high crystallinity, structural diversity, chemical stability, solution-processability, etc. [58][59][60][61][62][63][64][65][66][67][68][69][70] Different from MOFs that are composed of both inorganic (metal ions) and organic species (organic ligands) through coordination, COMs refer to a kind of crystalline materials composed of pure organics connected by either covalent or noncovalent bonds. [71][72][73] For COMs connected by noncovalent bonds, the typical materials are organic molecular crystals with intriguing properties such as semiconductor, [53] porosity, [68] etc. Owing to the inefficient packing of organic building blocks in the crystal state, some molecular crystals display extrinsic porosity, which are often termed as hydrogen-bonded organic frameworks (HOFs) [74,75] or supramolecular organic frameworks (SOFs). [76][77][78][79][80] For COMs connected by covalent bonds, typical materials are crystalline covalent organic frameworks (COFs), which were firstly reported in 2005 by Yaghi and co-workers [44] Benefitting from rigid chemical bonds and building blocks, COFs show permanent and well-ordered porosity. [45][46][47][48] Supramolecular-macrocycle-based COMs, a class of COMs with macrocycles as the main building blocks, have drawn particular attention in recent years. According to their components, supramolecular-macrocycle-based COMs can be classified into two main categories, the ones composed of pure macrocycles and the others consisting of macrocycles and other simple organic building blocks. Owing to their prefabricated cavities of a certain type, some of macrocycle-based COMs exhibit intrinsic microporosity for guest adsorption in the solid state. On the other hand, the extrinsic porosity of some macrocyclebased COMs may form due to the inefficient packing of these rigid macrocyclic molecules in the crystalline state. In certain circumstances, both intrinsic and extrinsic microporosity can be created in a single lattice of a certain COM, thus leading to Supramolecular macrocycles are well known as guest receptors in supramolecular chemistry, especially host−guest chemistry. In addition to their wide applications in host−guest chemistry and related areas, macrocycles have also been employed to construct crystalline organic materials (COMs) owing to their particular structur...

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Section: Introductionmentioning

confidence: 99%

Supramolecular‐Macrocycle‐Based Crystalline Organic Materials

et al. 2019

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“…XPS was used to analyze the variation in chemical components to a depth of 10 nm, which corresponds to the thickness of two lamellar layers. Nitrogen content of 0.92 and 5.45% was found before and after annealing, respectively ( Figure a).…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the Photoalignment Stability of Block Copolymer Brushes by Anchor Segments

Cai

Huang

Zheng

et al. 2018

Macro Chemistry & Physics

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It is known that the use of a homopolymer derived from a relatively high‐surface‐energy block moiety in a diblock copolymer as a substrate can facilitate phase separation of the block copolymer in the form of a layered structure parallel to the substrate. This is an effective approach for preparing a photoresponsive surface molecular brush for liquid‐crystal alignment. However, the alignment of the polymer brushes soon diminishes during elastic deformation of the polymeric substrate due to the weak interaction between the copolymer and polymeric substrate in the interfacial blend layer. In this study, rigid segments composed of N‐p‐anisylmaleimide were controllably introduced via copolymerization into a series of well‐defined diblock copolymers as “anchors” to resist the “drift” of the copolymer from a polymethyl methacrylate substrate at above its glass transition temperature. The anchoring mechanism and the stability of the aligned azobenzene polymeric brushes were systematically studied and compared.

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“…The behavior of the monolayer brush surface could be photocontrolled, resulting in the ability to affect the cell adhesion and survival of Escherichia coli and Staphylococcus aureus bacteria cells on the surface . Bian et al used a similar β‐cyclodextrin/azobenzene and cell capture aptamer‐functionalized material for photocontrolled capture and release of cancer cells . Further examples of biological applications of cyclodextrin/azobenzene‐functionalized materials can be found in a review by Zhan et al As many early examples of these systems are UV‐responsive, recent work has endeavored to redshift the absorption toward visible and near‐IR–responsive systems for greater biocompatibility .…”

Section: Interfacing Azo To Bio: An Eye Toward Influencing Living Sysmentioning

confidence: 99%

Photoreversible Soft Azo Dye Materials: Toward Optical Control of Bio‐Interfaces

Chang

Fedele

Priimägi

et al. 2019

Advanced Optical Materials

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systems interact with artificial materials, researchers have now assembled a versatile toolkit of materials and processes that allows one to fine-tune interactions at the interface, tailoring specific biological responses on demand. These strategies for biocontrol can be broadly categorized as chemical (charge, ligand presence, surface groups), material changes (moisture content, stiffness), or morphological changes (molecular orientation, surface topography, or mechanical actuation). Rational design of materials for biological interface applications has a unique set of challenges due to the unique requirements of a wide range of biological systems, since different tissues present specific compositions, with their own elasticity, structural organization, and triggering mechanisms. Even within a single organ or tissue, mechanical properties can vary widely depending on the region. A recent study of viscoelasticity in live mouse brain tissue for example found a tenfold difference within the brain depending on the region and morphological structure studied. [2] However, most biological tissues are far less stiff, and far more viscoelastic than typical artificial materials employed at their interface, especially early artificial cell culture materials, which can be much stiffer than in vivo extracellular matrix by many orders of magnitude. [3] In vivo, cells interface with a surrounding microenvironment consisting of an intricate macromolecular network of proteins and sugars swollen in an aqueous media gel. Therefore, the interaction between cells and the extracellular matrix (ECM) in the body is complex and involves a variety of cues related to topography, chemical markers, protein composition, solubility factors, and mechanical properties such as stiffness and elasticity (Figure 1a). [4] Yet much research over the past decades was focused on studying in vitro the effects of each of these signals on cell behavior, with a particular interest on the chemical factors, whereas only recently more advanced biomaterials with controlled physicomechanical properties have been developed, such as those with tunable and variable stiffness, alignment and orientation of key functional groups, and mechanical actuation. There is a large range of stiffness in human tissue, where bone (≈100 GPa) is nine orders of magnitude harder than brain tissue (≈0.1 kPa). [4] Therefore, biomaterial researchers assume a complex task of providing materials and processing technologies for controlling stiffness and micro-and nanostructures in Photoreversible optically switchable azo dye molecules in polymer-based materials can be harnessed to control a wide range of physical, chemical, and mechanical material properties in response to light, that can be exploited for optical control over the bio-interface. As a stimulus for reversibly influencing adjacent biological cells or tissue, light is an ideal triggering mechanism, since it can be highly localized (in time and space) for precise and dynamic control over a biosystem, and low-power visible light...

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Light-Triggered Specific Cancer Cell Release from Cyclodextrin/Azobenzene and Aptamer-Modified Substrate

Cited by 93 publications

References 51 publications

Supramolecular‐Macrocycle‐Based Crystalline Organic Materials

Supramolecular‐Macrocycle‐Based Crystalline Organic Materials

Enhancement of the Photoalignment Stability of Block Copolymer Brushes by Anchor Segments

Photoreversible Soft Azo Dye Materials: Toward Optical Control of Bio‐Interfaces

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