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Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice
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Abnormal lymphatic S1P signaling aggravates lymphatic dysfunction and tissue inflammation.

Dongeon Kim1,2, Wen Tian1,2, Timothy Ting-Hsuan Wu2,3

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Reduced sphingosine-1-phosphate (S1P) signaling in lymphatic endothelial cells (LECs) worsens lymphedema by increasing cell adhesion and T cell activation. P-selectin inhibitors show promise for treating this condition.

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Area of Science:

  • Immunology
  • Vascular Biology
  • Cell Signaling

Background:

  • Lymphedema is a global health issue lacking effective drug treatments.
  • Targeting T cell immunity and lymphatic endothelial cell (LEC) signaling offers therapeutic potential.
  • Sphingosine-1-phosphate (S1P) signaling is crucial for LEC function and its alteration can drive lymphatic disease and T cell activation.

Conclusions:

  • Reduced LEC S1P signaling exacerbates lymphedema by enhancing LEC adhesion and pathogenic CD4 T cell responses.
  • P-selectin inhibitors represent a potential therapeutic strategy for lymphedema.
  • S1PR1 signaling in LECs regulates local inflammation and T cell responses in lymphedema.