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Derivation of Mouse Trophoblast Stem Cells from Blastocysts
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Derivation of Mouse Trophoblast Stem Cells from Blastocysts

Published on: June 8, 2010

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MAP3K4 signaling regulates HDAC6 and TRAF4 coexpression and stabilization in trophoblast stem cells

Hannah A Nelson1, Nathan A Mullins1, Amy N Abell1

  • 1Department of Biological Sciences, University of Memphis, Memphis, Tennessee, USA.

The Journal of Biological Chemistry
|December 22, 2024
PubMed

Insights

Mitogen-activated protein kinase kinase kinase 4 (MAP3K4) inactivation impairs placental growth. This study reveals MAP3K4, TRAF4, and HDAC6 coregulation mechanisms critical for placental development and fetal growth.

Area of Science:

  • Reproductive biology and developmental science
  • Molecular and cellular biology
  • Genetics and epigenetics

Background:

  • Mitogen-activated protein kinase kinase kinase 4 (MAP3K4) is essential for fetal and placental growth.
  • MAP3K4 inactivation leads to placental insufficiency and fetal growth restriction by disrupting key signaling pathways and altering histone deacetylase 6 (HDAC6) activity.
  • The role of Tumor necrosis factor receptor-associated factor 4 (TRAF4) in placental development and its interaction with MAP3K4 are not well understood.

Purpose of the Study:

  • To investigate the role of TRAF4 in placental development and its association with MAP3K4.
  • To elucidate the molecular mechanisms underlying the coregulation of TRAF4 by MAP3K4 and HDAC6 in trophoblast stem cells.
  • To examine the interplay between MAP3K4, TRAF4, and HDAC6 during placental labyrinth development.

Main Methods:

  • Analysis of murine placenta single-cell RNA-Seq data to assess gene coexpression patterns.
  • Experimental manipulation of MAP3K4 activity and HDAC6 expression in trophoblast stem (TS) cells.
  • Protein complex formation assays and assessment of TRAF4 expression under varying experimental conditions.

Main Results:

  • TRAF4 is coexpressed with MAP3K4 in early placental progenitors and with HDAC6 in differentiated trophoblasts.
  • TRAF4 expression is upregulated in MAP3K4-inactive cells and upon inhibition of MAP3K4-dependent pathways.
  • HDAC6 directly interacts with TRAF4, promoting TRAF4 expression independently of its deacetylase activity.

Conclusions:

  • MAP3K4 and HDAC6 collaboratively regulate TRAF4 expression in trophoblast stem cells.
  • A dynamic switch in TRAF4 coexpression from MAP3K4 to HDAC6 occurs during placental labyrinth differentiation.
  • These findings reveal novel regulatory mechanisms involving MAP3K4, TRAF4, and HDAC6 crucial for placental development.
Keywords:
HDAC6MAP3K4TRAF4placentaprotein complexprotein expressionprotein stabilityprotein-protein interactiontrophoblast stem cell

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