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Runx Family Genes in Tissue Stem Cell Dynamics.

Chelsia Qiuxia Wang1,2, Michelle Meng Huang Mok1, Tomomasa Yokomizo3

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|March 17, 2017
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Runx genes regulate tissue stem cells in blood and skin through diverse mechanisms, not a single common pathway. These findings highlight the complexity of Runx family gene functions in stem cell biology.

Keywords:
AgingConditional knockout miceDNA damage repairFetal liverHair follicle stem cellHematopoietic stem cellHmga2LeukemiaNichePerinatalRunxSkin cancer

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Cancer Biology

Background:

  • Runx family genes are crucial for tissue stem cell regulation in development and cancer.
  • Their roles in blood and skin stem cells are well-established.
  • Previous understanding suggested a common regulatory mechanism for Runx proteins across different stem cell types.

Purpose of the Study:

  • To review and summarize the known functions of Runx genes in blood and skin tissue stem cells.
  • To explore the mechanisms by which Runx proteins regulate diverse stem cell populations.
  • To highlight the complexity and specificity of Runx involvement in stem cell behavior.

Main Methods:

  • Review of existing literature on Runx gene functions in stem cells.
  • Analysis of findings from cell type-, developmental stage-, and age-specific gene targeting studies in mice.
  • Examination of recent experimental data on Runx1 function in hematopoietic and skin stem cells.

Main Results:

  • Runx family genes utilize multiple, spatiotemporal mechanisms rather than a single common machinery to regulate different tissue stem cells.
  • Runx1 has roles beyond the endothelial-to-hematopoietic cell transition (EHT), including perinatal stages.
  • Runx1 is essential for the specification of hair follicle stem cells (HFSCs) in a cell-extrinsic manner.

Conclusions:

  • Runx gene regulation of stem cells is more complex and varied than previously understood.
  • Specific Runx requirements differ across distinct tissue stem cell populations.
  • Further research is needed to fully elucidate the intricate roles of Runx family genes in stem cell regulation.