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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Shape-Versatile Fixed Cellular Materials for Multiple Target Immunomodulation.

Ana Rita Sousa1, Ana F Cunha1, Ana Santos-Coquillat1

  • 1Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal.

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Summary
This summary is machine-generated.

Researchers developed fixed 3D cellular materials to enhance cell therapies. These immunomodulatory materials reduce inflammation in vitro and in vivo, offering a stable alternative to living therapeutic cells.

Keywords:
cellular materialsfixed cell‐rich materialsimmunomodulationimmunosuppressionshape‐adaptability

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Area of Science:

  • Biomaterials Science
  • Cell Therapy Engineering
  • Immunomodulation

Background:

  • Current cell therapies use living cells, risking migration and phenotype changes.
  • Single-cell administration leads to rapid in vivo clearance.
  • 3D cellular materials offer potential for sustained therapeutic effects and structural constructs.

Purpose of the Study:

  • To develop shape-versatile, fixed cell-based materials with immunomodulatory properties.
  • To stabilize cellular constructs for therapeutic applications.
  • To investigate the anti-inflammatory effects of these materials in vitro and in vivo.

Main Methods:

  • Manufacturing of living cell aggregates (spheres, fibers) followed by fixation.
  • Assessment of structural integrity, robustness, and flexibility of 3D constructs.
  • In vitro evaluation of anti-inflammatory effects on human macrophages (NF-κB pathway).
  • In vivo studies in mouse skin wounds.
  • Analysis of T lymphocyte proliferation and regulatory population changes.

Main Results:

  • Fixed 3D cellular materials with maintained structural integrity were successfully manufactured.
  • Materials demonstrated in vitro anti-inflammatory effects on macrophages, correlated with surface area.
  • In vivo studies in mouse skin wounds confirmed reduced inflammation.
  • Contact with materials reduced activated T lymphocyte proliferation and promoted regulatory T cell populations.

Conclusions:

  • Fixation of cellular constructs is a versatile method for phenotypic stabilization.
  • This approach enables the creation of immunomodulatory materials with therapeutic potential.
  • Fixed 3D cellular materials offer a promising alternative to living cell therapies, mitigating risks of migration and unpredictable phenotypes.