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Updated: Jun 23, 2025

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells
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Posttranscriptional Modification to Modulate Progenitor Differentiation on Heterotypic Spheroids.

Nazmiye Celik1,2, Srinivas V Koduru3, Dino J Ravnic4

  • 1Engineering Science and Mechanics Department, The Pennsylvania State University, University Park, Pennsylvania, USA.

Tissue Engineering. Part A
|June 14, 2024
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRs) guide stem cell differentiation for creating vascularized bone tissue models. Optimizing induction time is key for successful coculture and potential 3D bioprinting applications.

Keywords:
boneendotheliogenesismiRNAosteogenesisparacrine signalingprogenitorsspheroidsvascularization

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Area of Science:

  • Biomaterials Science
  • Stem Cell Biology
  • Tissue Engineering

Background:

  • Cell aggregates are crucial for studying vascularization in vitro.
  • Understanding heterotypic cellular interactions is vital for tissue development.

Purpose of the Study:

  • To investigate the role of microRNAs (miRs) in inducing osteogenic and endotheliogenic differentiation in cell spheroids.
  • To assess the impact of miR treatment and induction time on codifferentiation for vascularized bone modeling.

Main Methods:

  • Constructed heterotypic spheroids using adipose-derived stem cells and endothelial progenitor cells.
  • Transfected cells with miR-148b mimic for osteogenesis and miR-210 mimic for endotheliogenesis.
  • Cultured spheroids for 4 weeks, analyzing gene/protein markers and mineralization.

Main Results:

  • MicroRNAs effectively directed cell differentiation towards osteogenic and endotheliogenic lineages.
  • Progenitor cell maturity significantly influenced the formation of heterotypic cellular regions within aggregates.
  • Induction time prior to aggregation was a critical factor for successful codifferentiation.

Conclusions:

  • The study demonstrates a novel approach using miRs to guide differentiation for creating prevascularized bone tissue models.
  • Optimizing the timing of differentiation induction is essential for successful coculture.
  • This spheroid-based method holds potential for advanced tissue engineering applications, including 3D bioprinting.