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Updated: Jul 2, 2026
05:59
Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice
Published on: May 14, 2020
Mechanoreceptor plexin D1 regulates lymphatic valve morphogenesis and lymphedema pathogenesis
Kar-Lai Pang1,2, Vedanta Mehta1,2, Claire Aitken1,2
1Division of Cardiovascular Medicine, Radcliffe Department of Medicine, and.
The Journal of Clinical Investigation
|July 1, 2026
Summary
Plexin D1 (PLXND1) acts as a crucial lymphatic mechanosensor, guiding valve development. Discovering its role in lymphedema offers new therapeutic avenues for this debilitating condition.
Area of Science:
- Vascular Biology
- Mechanobiology
- Human Genetics
Background:
- Lymphatic valves are vital for fluid balance, and their failure causes lymphedema.
- Mechanical forces regulate lymphatic valve development, but the sensing mechanism is unknown.
Purpose of the Study:
- Identify the mechanosensor responsible for lymphatic valve development.
- Investigate the role of this sensor in primary lymphedema.
Main Methods:
- Conditional genetic ablation of Plexin D1 (PLXND1) in lymphatic endothelial cells.
- Functional analysis of PLXND1 variants in lymphedema patients.
- Screening patients with primary lymphedema.
Main Results:
- PLXND1 is essential for lymphatic valve morphogenesis.
- PLXND1 functions as a mechanosensor within a novel lymphatic mechanocomplex.
- Pathogenic PLXND1 variants identified in lymphedema patients disrupt receptor function.
Conclusions:
- Uncovers a novel mechanosensing pathway regulating lymphatic valve development.
- Highlights the role of PLXND1 and associated mechanocomplex in primary lymphedema.
- Provides insights into potential therapeutic targets for lymphedema.
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