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Tbx1 modulates endodermal and mesodermal differentiation from mouse induced pluripotent stem cells.

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  • 11 Department of Allied Health Sciences, University of Connecticut , Storrs, Connecticut.

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The T-box transcription factor 1 (Tbx1) level is critical for embryonic development. Precise Tbx1 levels in induced pluripotent stem cells (iPSCs) are essential for proper endodermal and mesodermal lineage differentiation.

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Area of Science:

  • Developmental biology
  • Stem cell biology
  • Genetics

Background:

  • T-box transcription factors (Tbx) regulate embryonic development.
  • Tbx1 is implicated in 22q11.2 deletion syndrome.
  • Induced pluripotent stem cell (iPSC) technology aids disease modeling and therapy development.

Purpose of the Study:

  • To investigate the role of Tbx1 in iPSC differentiation.
  • To analyze the impact of Tbx1 levels on endodermal and mesodermal lineage formation.
  • To explore Tbx1's regulation of fibroblast growth factors (FGFs).

Main Methods:

  • Generation of Tbx1(-/-) and Tbx1(+/+) iPSCs from fibroblasts.
  • Spontaneous differentiation of iPSCs into embryoid bodies.
  • Lineage analysis and gene expression profiling (FGF10, FGF8).
  • Rescue experiments using inducible lentiviral Tbx1 expression.

Main Results:

  • Tbx1(-/-) iPSCs showed compromised endodermal and mesodermal differentiation.
  • Restoring Tbx1 expression rescued differentiation potential.
  • Overexpression of Tbx1 also led to differentiation defects.
  • Tbx1 regulates FGF10 and FGF8 expression.

Conclusions:

  • Tbx1 level is a crucial determinant for endodermal and mesodermal lineage differentiation.
  • Dysregulation of Tbx1 impacts embryonic development.
  • Tbx1 influences FGF signaling pathways.