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Plexin D1 negatively regulates zebrafish lymphatic development.

Denver D Britto1, Jia He2, June P Misa1

  • 1Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1023, New Zealand.

Development (Cambridge, England)
|October 7, 2022
PubMed
Summary
This summary is machine-generated.

Plexin D1 (Plxnd1) is identified as a key regulator of lymphatic vessel development in zebrafish. This transmembrane receptor guides lymphatic endothelial cell migration, preventing overgrowth and ensuring proper vessel patterning.

Keywords:
LymphangiogenesisLymphaticPlexin D1VEGFRZebrafish

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Vascular Biology

Background:

  • Lymphangiogenesis, the formation of lymphatic vessels, involves complex cell migration.
  • Molecular mechanisms guiding lymphatic vessel patterning are not fully understood.
  • A global regulator for lymphatic vessel guidance remains unknown.

Purpose of the Study:

  • To identify novel regulators of lymphatic vessel guidance and lymphangiogenesis.
  • To investigate the role of Plexin D1 (Plxnd1) in lymphatic development.
  • To elucidate the molecular pathways controlling lymphatic patterning.

Main Methods:

  • Zebrafish model system utilized for studying lymphatic development.
  • Analysis of plxnd1 expression patterns in developing lymphatic networks.
  • Functional studies involving loss-of-function of plxnd1 and its ligands.

Main Results:

  • Plexin D1 (Plxnd1) is identified as a negative regulator of lymphatic vessel guidance and lymphangiogenesis in zebrafish.
  • Loss of plxnd1 leads to misguided lymphatic vessel growth and aberrant facial lymphatic branching.
  • Plxnd1 ligands, Semaphorin 3AA and Semaphorin 3C, mediate trunk lymphatic guidance.
  • Plxnd1 antagonizes Vegfr/Erk signaling, controlling facial lymphatic endothelial cell numbers and preventing hyperplasia.

Conclusions:

  • The Semaphorin/Plexin D1 (Plxnd1) signaling pathway acts as a global negative regulator of lymphatic vessel development.
  • Dysregulation of lymphatic growth in diseases may be targeted by modulating the Sema/Plxnd1 pathway.
  • Understanding Plxnd1 function provides insights into therapeutic strategies for lymphatic disorders.