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PlexinD1 deficiency induces defects in axial skeletal morphogenesis.

Tomoatsu Kanda1, Yutaka Yoshida, Yayoi Izu

  • 1Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 3-10 Kanda-Surugadai 2-Chome, Chiyoda-ku, Tokyo 101-0062, Japan.

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PlexinD1 deficiency causes axial skeletal defects in mice, impacting vertebral and rib bone shape and cartilage development. This highlights PlexinD1

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Area of Science:

  • Developmental Biology
  • Skeletal Biology
  • Vascular Biology

Background:

  • Embryonic skeletogenesis and angiogenesis are coordinated processes.
  • PlexinD1, a plexin family member, is crucial for embryonic blood vessel patterning.
  • PlexinD1 expression is observed in the central nervous system and endothelium.

Purpose of the Study:

  • To investigate the role of PlexinD1 in embryonic skeletogenesis.
  • To determine the effects of PlexinD1 deficiency on axial skeletal development and bone formation.

Main Methods:

  • Three-dimensional micro CT imaging to assess skeletal structure.
  • Histological examination of vertebral bodies and long bones.
  • Von Willebrand factor staining to evaluate microvasculature integrity.
  • Analysis of PlexinD1 expression in bone tissues.

Main Results:

  • PlexinD1 deficiency led to axial skeletal defects, including malformed vertebral bodies and ribs.
  • Altered cartilage development was observed in PlexinD1-deficient mice.
  • Reduced von Willebrand factor staining in microvasculatures attached to vertebral bone was noted.
  • PlexinD1 is expressed in osteoblastic cells and bone tissues.

Conclusions:

  • PlexinD1 plays a significant role in the patterning of axial skeletogenesis.
  • PlexinD1 deficiency impacts skeletal development and associated microvasculature.