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Related Experiment Video

Updated: Sep 29, 2025

In Vivo Targeted Expression of Optogenetic Proteins Using Silk/AAV Films
06:11

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Highly Effective Stroke Therapy Enabled by Genetically Engineered Viral Nanofibers.

Xiangyu Liu1, Mei Yang2, Fang Lei2

  • 1School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|March 22, 2022
PubMed
Summary

Engineered filamentous phages on silk microparticles promote neural stem cell differentiation and brain tissue regeneration after stroke. This novel biomaterial approach enhances motor function recovery in rat models.

Keywords:
angiogenesismicroparticlesneurogenesisstroke therapyviruses

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Area of Science:

  • Biomaterials Science
  • Neuroscience
  • Regenerative Medicine

Background:

  • Stroke causes brain cavities, hindering regeneration due to poor angiogenesis and neurogenesis.
  • Current stroke therapies face challenges in promoting effective brain tissue repair.

Purpose of the Study:

  • To develop an injectable biomaterial for brain tissue regeneration in stroke cavities.
  • To investigate the efficacy of engineered phage nanofibers in promoting neural stem cell activity and functional recovery.

Main Methods:

  • Genetically engineering filamentous phages to display RGD peptides.
  • Coating viral nanofibers onto silk protein microparticles for neural stem cell (NSC) delivery.
  • Injecting NSC-loaded microparticles into stroke cavities in rat models.

Main Results:

  • Phage nanofibers promoted NSC adhesion, proliferation, infiltration, and neuronal differentiation.
  • In vivo studies showed enhanced angiogenesis and neurogenesis within two weeks.
  • Significant functional recovery of limb motor control was observed within 12 weeks.
  • Reduced inflammatory response and glial scarring were noted.

Conclusions:

  • Injectable phage nanofibers on silk microparticles are a promising biomaterial for stroke therapy.
  • This approach effectively stimulates brain regeneration and functional recovery.
  • The phage display technology offers a versatile platform for developing advanced regenerative therapies.