Cited by 99Lymphatic System and DiseasesLymphatic Disorders and TreatmentsDevelopmental Biology and Gene Regulation

Phospholipase Cγ2 is necessary for separation of blood and lymphatic vasculature in mice

Ichise, Hirotake, Ichise, Taeko, Ohtani, Osamu, Yoshida, Nobuaki·2009·Development

Abstract

The lymphatic vasculature originates from the blood vasculature through a mechanism relying on Prox1 expression and VEGFC signalling, and is separated and kept separate from the blood vasculature in a Syk- and SLP76-dependent manner. However, the mechanism by which lymphatic vessels are separated from blood vessels is not known. To gain an understanding of the vascular partitioning, we searched for the affected gene in a spontaneous mouse mutant exhibiting blood-filled lymphatic vessels, and identified a null mutation of the Plcg2 gene, which encodes phospholipase Cγ2 (PLCγ2),by positional candidate cloning. The blood-lymph shunt observed in PLCγ2-null mice was due to aberrant separation of blood and lymphatic vessels. A similar phenotype was observed in lethally irradiated wild-type mice reconstituted with PLCγ2-null bone marrow cells. These findings indicate that PLCγ2 plays an essential role in initiating and maintaining the separation of the blood and lymphatic vasculature.

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Crossref · 10.1242/dev.025353

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  • Previous studies have reported internal hemorrhaging during development in other Plcg2 deficient mouse models, which have been proposed to be caused by rupture of blood-filled fragile lymphatic vessels by mechanical stress or pressure of the blood flow.

    “Previous studies have reported internal hemorrhaging during development in other Plcg2 deficient mouse models (29, 30), which have been proposed to be caused by rupture of blood-filled fragile lymphatic vessels by mechanical stress or pressure of the blood flow (29).”
  • The cause of death was not determined but may be related to the previously described essential role of PLCγ2 in initiating the separation of the blood and lymphatic vasculature.

    “The cause of death was not determined but may be related to the previously described essential role of PLCγ2 in initiating the separation of the blood and lymphatic vasculature (29).”
  • PLCγ2 is necessary for separation of blood and lymphatic vessels in mice and osteoclastogenesis, and PLCγ2 outside of the brain has roles in immune deficiencies, autoimmunity, and cancer.

    “PLCγ2 is necessary for separation of blood and lymphatic vessels in mice (29) and osteoclastogenesis (42), and PLCγ2 outside of the brain has roles in immune deficiencies, autoimmunity, and cancer (18).”
  • In different models of PLCG2 depletion, homozygous knockout embryos were found to have significant subcutaneous hemorrhaging, suggesting impacted vascular development and bleeding that may underlie embryonic death and reduced frequencies at weaning.

    “In different models of PLCG2 depletion, homozygous knockout embryos were found to have significant subcutaneous hemorrhaging, suggesting impacted vascular development and bleeding that may underlie embryonic death and reduced frequencies at weaning.”

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Authors
Ichise, H., Ichise, T., Ohtani, O., & Yoshida, N.
Affiliations
  • Institute of Medical Science, The University of Tokyo (JP)
  • University of Toyama (JP)
Venue
Development
Published
2009-01-15
Volume
136
Issue
2
Pages
191-195
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2116298485
Cited by
98
References
19
Citations by year
2026: 2 · 2025: 5 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 5 · 2019: 5 · 2018: 2 · 2017: 8 · 2016: 9 · 2015: 4 · 2014: 11 · 2013: 7 · 2012: 7
FWCI
4.58
Type
journal article
Language
en
Open access
closed
Locations
  • Development (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Lymphatic System and Diseases
  • Health Sciences › Medicine › Surgery › Lymphatic Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
PLCγ2, lymphatic vessels, lymphatic development, Prox1, Syk, SLP-76, bone marrow reconstitution
MeSH terms
Animals, Base Sequence, Blood Vessels, Cells, Cultured, Female, Humans, Mice, Mutant Strains, Mice, Transgenic, Polymorphism, Genetic, Pregnancy, Radiation Chimera, Bone Marrow Transplantation, DNA Primers, Mice, Knockout, Lymphatic Vessels, Endothelial Cells, Mice, Phospholipase C gamma

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