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Alginate-based 3D bioprinting strategies for structure-function integrated tissue regeneration.

Fan Liu1, Jiabao Jiang1, Man Zhe2

  • 1Department of Orthopedic Surgery, Trauma Medical Center, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China.

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Alginate bioinks are advancing 3D bioprinting for tissue regeneration. Modifications enhance printability and cell environments, enabling integrated structural and functional repair.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Bioprinting Technology

Background:

  • Alginate biomaterials are favored for tissue repair due to biocompatibility and tunability.
  • Advancements in bioprinting have positioned alginate as a key bioink for tissue substitutes.
  • Modified alginate bioinks improve printability and cell viability for tissue regeneration.

Purpose of the Study:

  • To systematically review recent advances in alginate-based 3D bioprinting for tissue regeneration.
  • To provide a comprehensive framework for developing and applying alginate bioinks in bioprinting.
  • To synthesize research on strategies for structure-function integrated tissue regeneration using alginate.

Main Methods:

  • Review of synthesis and preparation of alginate as a bioink.
  • Analysis of 3D bioprinting techniques and alginate-based bioink formulations.
  • Discussion of seed cell selection and challenges in alginate-based bioprinting.

Main Results:

  • Alginate bioinks, through modifications and blending, offer enhanced printability and physicochemical properties.
  • These improvements create a favorable microenvironment for seed cells, promoting tissue repair.
  • Recent strategies focus on vascularization, property modification, and active factor delivery.

Conclusions:

  • Alginate-based 3D bioprinting holds significant promise for integrated tissue regeneration.
  • Addressing challenges like vascular network construction and clinical translation is crucial.
  • Future directions include 4D bioprinting, AI integration, and optimized printing methods.