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The development of static hydrogels as an optimal choice for bone tissue engineering (BTE) remains a difficult challenge primarily due to the intricate nature of bone healing processes, continuous physiological functions, and pathological changes. Hence, there is an urgent need to exploit smart hydrogels with programmable properties that can effectively enhance bone regeneration. Increasing evidence suggests that photoresponsive hydrogels are promising bioscaffolds for BTE due to their advantages such as controlled drug release, cell fate modulation, and the photothermal effect. Here, we review the current advances in photoresponsive hydrogels. The mechanism of photoresponsiveness and its advanced applications in bone repair are also elucidated. Future research would focus on the development of more efficient, safer, and smarter photoresponsive hydrogels for BTE. This review is aimed at offering comprehensive guidance on the trends of photoresponsive hydrogels and shedding light on their potential clinical application in BTE.
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http://dx.doi.org/10.1021/acsbiomaterials.3c01485 | DOI Listing |
Angew Chem Int Ed Engl
September 2025
Institute of Pharmaceutical Science, King's College London, Franklin Wilkins Building, Stamford Street, London, SE1 9NH, UK.
As supramolecular assemblies, polypseudorotaxanes (PPR) exhibit inherent advantages in modular adaptability and structural programmability, with the potential to build tuneable platforms integrating various functionalities. Here we report the "one-pot" preparation of a self-assembled thiol-rich PPR (SPPR), where thiolated-α-cyclodextrins (SHαCD) spontaneously thread onto polymers, and are then crosslinked into a three-dimensional network by the thermally-triggered oxidation of thiols into disulfide bonds. The dynamic thiol groups along the SPPR provide remarkable modularity for the functionalization of thiophilic metal nanoparticles (NPs), exemplified by two application vectors.
View Article and Find Full Text PDFLangmuir
September 2025
Department of Chemistry and Chemical Biology, IIT (ISM), Dhanbad 826004, Jharkhand, India.
The understanding of light-mediated control in advanced materials critically depends on the deployment of highly efficient azobenzene-based photoswitches. A key challenge lies in optimizing their light reactivity and developing water-soluble variants that can function as hydrogel cross-linkers. This study represents the design and synthesis of a water-soluble, cationic azobenzene derivative, which serves as a versatile cross-linker to develop a photoresponsive azobenzene composed of sodium salt of poly-2-acrylamido-2-methylpropanesulfonic acid-based [Azo(+)@pSAMPS(-)] hydrogels.
View Article and Find Full Text PDFInt J Biol Macromol
August 2025
College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, PR China. Electronic address:
The Janus adhesive wound dressings exhibit properties analogous to human skin. Specifically, they must possess both adhesive and non-adhesive characteristics to function effectively. The adhesive property ensures secure attachment to the wound site, while the non-adhesive side acts as a protective barrier against external contaminants.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
August 2025
Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan.
Viruses are versatile colloidal materials in their biofunctions, monodispersed and periodic structures, and high surface designability. For expanding the applicability of virus-based materials, spatiotemporally controlled immobilization and dispersion of viruses with retained activity should be useful, though control of the dynamic nature of viruses hybridized with commonly used polymers has been difficult due to their strong interactions. Here, we report a self-assembling peptide (A2Az) enabling photo control of adhesion and dispersion of M13 bacteriophage virus (M13 phage) and successfully demonstrate patterning of localization and infection of the virus.
View Article and Find Full Text PDFNat Rev Bioeng
February 2025
Department of Bioengineering, University of Washington, Seattle, WA, USA.
Light has become an essential tool to make and manipulate living systems in the increasingly intertwined fields of cell biology and materials science. With the ever-expanding interdisciplinary nature of current scientific research and the ongoing hunt for orthogonal, high-precision stimuli for biomaterial synthesis and modification, light has emerged as the gold standard with its low cytotoxicity and high bioorthogonality, enabling the modulation of properties in both 3D space and time (that is, 4D). Not only can light govern when and where changes occur, dosage modulation permits control over the extent of material customization, providing a route to engineered constructs approaching the 4D complexity of native tissue.
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