ArticleMacromolecular bioscience2026
Thiol-Methylsulfone Crosslinked Hydrogels for Cell Encapsulation: Molecular Scale Modulation of Physiochemical Properties.
Article in Macromolecular bioscience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hydrogels mimicking the mechanical and biochemical features of the cellular microenvironment allow cell encapsulation and facilitate in vitro 3D culture. In addition to biocompatibility and reactivity in physiological conditions, a key criterion for crosslinking chemistry is appropriate gelation kinetics to allow mixing and homogeneous distribution of cells with the hydrogel precursors. We have previously presented aryl methylsulfone/thiol (MS/SH) reaction as a thiol-reactive cross-linking system for cell encapsulation in star polyethylene glycol (PEG4) hydrogels with a gelation kinetics in minutes time scale. Remaining experimental challenges for this system are a finer modulation of gelation kinetics and streamlining the synthesis of the prepolymer. Here we present the possibility to tune the gelation kinetics by introducing an electron-withdrawing substituent at p-position of the aryl MS ring. This variant also presents synthetic advantages. We study the influence of the p-substituent on the physicochemical properties of MS/SH crosslinked hydrogels, and their performance for cell encapsulation. We compare these properties with the PEG-MS variant containing an electron-donating linker. The new star poly(ethylene glycol)-4-(5-(methylsulfonyl)-1H-tetrazol-1-yl)benzamide (PEG4-CONH-TzMS) shows superior properties as cell encapsulating hydrogel in terms of ease of mixing polymer precursors, faster gelation, homogenous cell distribution and high enzymatic stability.
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