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Mechanical forces from intercellular peptide self-assembly drive spheroid formation.

Honglei Lu1, Yaoting Li1, Xuejiao Yang1

  • 1Department of Chemistry, School of Science, Westlake University, No. 600 Dunyu Road, Hangzhou, Zhejiang Province, 310024, China.

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Scientists engineered 3D cell spheroids with capillary-like structures using peptide nanofibers. This tissue engineering advance improves models for cancer and diabetes research, enhancing drug delivery and regenerative medicine potential.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cell Biology

Background:

  • Cell spheroids are crucial for modeling tissue physiology and disease.
  • Current models often lack the complex vascularization seen in native tissues.
  • Engineering vascular-like structures in spheroids is a key challenge in regenerative medicine.

Purpose of the Study:

  • To develop a general strategy for engineering cell spheroids with capillary-like structures.
  • To investigate the role of peptide nanofibers in inducing tissue morphogenesis and function.
  • To create advanced 3D models for cancer and diabetes research.

Main Methods:

  • Utilizing intercellular self-assembly of peptide nanofibers to engineer cell spheroids.
  • Inducing mechanical changes in the extracellular matrix (ECM) via nanofibrous materials.
  • Activating mechanotransduction pathways to enhance cellular morphogenesis.
  • Analyzing gene expression profiles and functional assays (e.g., insulin secretion).

Main Results:

  • Successfully engineered dynamic 3D spheroids with integrated capillary-like structures.
  • Demonstrated enhanced cell-cell and cell-matrix interactions within the engineered spheroids.
  • Tumor spheroids exhibited gene expression profiles mirroring patient-derived tumors.
  • Islet cell spheroids showed significantly increased functionality, including glucose-stimulated insulin secretion.

Conclusions:

  • Peptide nanofiber-based self-assembly provides a robust platform for creating vascularized 3D cell models.
  • Engineered spheroids closely mimic human tissue physiology, offering superior models for disease research.
  • This approach holds significant potential for advancing cancer therapy, drug delivery, and regenerative medicine applications, particularly in diabetes treatment.