4.7 Review

A Narrative Review of Cell-Based Approaches for Cranial Bone Regeneration

Journal

PHARMACEUTICS
Volume 14, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/pharmaceutics14010132

Keywords

cranial bone; biomaterials; cell therapy; gene therapy

Funding

  1. MCIN/AEI [RTI2018-095159-B-I00, RED2018-102626-T]
  2. Regional Government of Madrid
  3. ERDF A way of making Europe

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This review provides an overview of current developments in cell-based strategies for enhancing the surgical armamentarium to regenerate cranial vault defects. The review focuses on cell-based approaches, delivery strategies for extracellular matrix, conditioned media, and extracellular vesicles, as well as recent advances in 3D printing and bioprinting techniques for cranial reconstruction. It also discusses cell-based gene therapy approaches with regulated and unregulated gene switches.
Current cranial repair techniques combine the use of autologous bone grafts and biomaterials. In addition to their association with harvesting morbidity, autografts are often limited by insufficient quantity of bone stock. Biomaterials lead to better outcomes, but their effectiveness is often compromised by the unpredictable lack of integration and structural failure. Bone tissue engineering offers the promising alternative of generating constructs composed of instructive biomaterials including cells or cell-secreted products, which could enhance the outcome of reconstructive treatments. This review focuses on cell-based approaches with potential to regenerate calvarial bone defects, including human studies and preclinical research. Further, we discuss strategies to deliver extracellular matrix, conditioned media and extracellular vesicles derived from cell cultures. Recent advances in 3D printing and bioprinting techniques that appear to be promising for cranial reconstruction are also discussed. Finally, we review cell-based gene therapy approaches, covering both unregulated and regulated gene switches that can create spatiotemporal patterns of transgenic therapeutic molecules. In summary, this review provides an overview of the current developments in cell-based strategies with potential to enhance the surgical armamentarium for regenerating cranial vault defects.

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