PLD1 and PLD2 differentially regulate the balance of macrophage polarization in inflammation and tissue injury

Won Chan Hwang, Seol Hwa Seo, Minju Kang, Rae Hee Kang, Gilbert Di Paolo, Kang Yell Choi, Do Sik Min

Research output: Contribution to journalArticlepeer-review

Abstract

Phospholipase D (PLD) isoforms PLD1 and PLD2 serve as the primary nodes where diverse signaling pathways converge. However, their isoform-specific functions remain unclear. We showed that PLD1 and PLD2 selectively couple to toll-like receptor 4 (TLR4) and interleukin 4 receptor (IL-4R) and differentially regulate macrophage polarization of M1 and M2 via the LPS–MyD88 axis and the IL-4–JAK3 signaling, respectively. Lipopolysaccharide (LPS) enhanced TLR4 or MyD88 interaction with PLD1; IL-4 induced IL-4R or JAK3 association with PLD2, indicating isozyme-specific signaling events. PLD1 and PLD2 are indispensable for M1 polarization and M2 polarization, respectively. Genetic and pharmacological targeting of PLD1 conferred protection against LPS-induced sepsis, cardiotoxin-induced muscle injury, and skin injury by promoting the shift toward M2; PLD2 ablation intensified disease severity by promoting the shift toward M1. Enhanced Foxp3+ regulatory T cell recruitment also influenced the anti-inflammatory phenotype of Pld1LyzCre macrophages. We reveal a previously uncharacterized role of PLD isoforms in macrophage polarization, signifying potential pharmacological interventions for macrophage modulation.

Original languageEnglish
Pages (from-to)5193-5211
Number of pages19
JournalJournal of Cellular Physiology
Volume236
Issue number7
DOIs
Publication statusAccepted/In press - 2020

Bibliographical note

Funding Information:
The present study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (NRF‐2018R1A2B3002179) and by the Yonsei University Research Fund of 2019‐22‐0193.

Publisher Copyright:
© 2020 The Authors. Journal of Cellular Physiology published by Wiley Periodicals LLC

All Science Journal Classification (ASJC) codes

  • Physiology
  • Clinical Biochemistry
  • Cell Biology

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