Lymphatic endothelial cells promote T lymphocyte migration into lymph nodes under hyperlipidemic conditions

Minhwa Park, Kyung Ah Cho, Yu Hee Kim, Kyung Ho Lee, So Youn Woo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Lymphatic vessels serve as conduits through which immune cells traffic. Because lymphatic vessels are also involved in lipid transport, their function is vulnerable to abnormal metabolic conditions such as obesity and hyperlipidemia. Exactly how these conditions impact immune cell trafficking, however, is not well understood. Here, we found higher numbers of LYVE-1-positive lymphatic endothelial cells and CD3-positive T cells in the lymph nodes of mice fed high-cholesterol or high-fat diets compared with those of mice fed a normal chow diet. To confirm the effect of fat content on immune cell trafficking, the lymphatic endothelial SVEC4-10 cell line was treated with palmitic acid at a 100 μM concentration. After 24 h, palmitic acid-treated cells exhibited increased expression of podoplanin and vascular growth-associated molecules (VEGFC, VEGFD, VEGFR3, and NRP2) and enhanced tube formation. Microarray analysis showed an increase in pro-inflammatory cytokine and chemokine transcription after palmitic acid treatment. Finally, transwell migration assay confirmed that T cell line moved toward medium previously cultured with palmitic acid-treated SVEC4-10 cells. Together, our results suggest that hyperlipidemia drives lymphatic vessel remodeling and T cell migration toward lymphatic endothelial cells.

Original languageEnglish
Pages (from-to)786-792
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume525
Issue number3
DOIs
StatePublished - 7 May 2020

Keywords

  • Chemokine
  • Hyperlipidemia
  • Lymphatic endothelial cells
  • T cell migration

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