Bioactive Materials (Jan 2025)

Combinational regenerative inductive effect of bio-adhesive hybrid hydrogels conjugated with hiPSC-derived myofibers and its derived EVs for volumetric muscle regeneration

  • Jiseong Kim,
  • Myung Chul Lee,
  • Jieun Jeon,
  • Alejandra Rodríguez-delaRosa,
  • Yori Endo,
  • Da-Seul Kim,
  • Andrea Donaxi Madrigal-Salazar,
  • Jeong Wook Seo,
  • Hyeseon Lee,
  • Ki-Tae Kim,
  • Jae-I Moon,
  • Seung Gwa Park,
  • Mariana Carolina Lopez-Pacheco,
  • Abdulhameed F. Alkhateeb,
  • Nebras Sobahi,
  • Nicole Bassous,
  • Wenpeng Liu,
  • Jae Seo Lee,
  • Seongsoo Kim,
  • Dilara Yilmaz Aykut,
  • Mahmoud Lotfi Nasr,
  • Mohammad Asif Hussain,
  • Soo-Hong Lee,
  • Woo-Jin Kim,
  • Olivier Pourquié,
  • Indranil Sinha,
  • Su Ryon Shin

Journal volume & issue
Vol. 43
pp. 579 – 602

Abstract

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In regenerative medicine, extracellular vesicles (EVs) possess the potential to repair injured cells by delivering modulatory factors. However, the therapeutic effect of EVs in large-scale tissue defects, which are subject to prolonged timelines for tissue architecture and functional restoration, remains poorly understood. In this study, we introduce EVs and cell-tethering hybrid hydrogels composed of tyramine-conjugated gelatin (GelTA) that can be in-situ crosslinked with EVs derived from human induced pluripotent stem cell-derived myofibers (hiPSC-myofibers) and hiPSC-muscle precursor cells. This hybrid hydrogel sustains the release of EVs and provides a beneficial nano-topography and mechanical properties for creating a favorable extracellular matrix. Secreted EVs from the hiPSC-myofibers contain specific microRNAs, potentially improving myogenesis and angiogenesis. Herein, we demonstrate increased myogenic markers and fusion/differentiation indexes through the combinatory effects of EVs and integrin-mediated adhesions in the 3D matrix. Furthermore, we observe a unique impact of EVs, which aid in maintaining the viability and phenotype of myofibers under harsh environments. The hybrid hydrogel in-situ crosslinked with hiPSCs and EVs is facilely used to fabricate large-scale muscle constructs by the stacking of micro-patterned hydrogel domains. Later, we confirmed a combinational effect, whereby muscle tissue regeneration and functional restoration were improved, via an in vivo murine volumetric muscle loss model.

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