Negative control of mast cell degranulation and the anaphylactic response by the phosphatase lipin1.

Journal Article

Mast cells play a critical role in the pathogenesis of allergic diseases; however, how mast cell function is regulated is still not well understood. Both phosphatidic acid (PA) and diacylglycerol (DAG) are important secondary messengers involved in mast cell activ-ation. Lipin1 is a phosphatidate phosphatase that hydrolyzes PA to produce DAG, but the role of lipin1 in mast cell function has been thus far unknown. Here we show that lipin1 is an important and selective inhibitor of mast cell degranulation. Lipin1 deficiency enhanced FcεRI-mediated β-hexosaminidase and prostaglandin D2 release from mast cells in vitro and exacerbated the passive systemic anaphylaxis reaction in vivo. Lipin1 deficiency, however, did not exert obvious effects on IL-6 or TNF-α production following FcεRI engagement. FcεRI-induced PKC and SNAP-23 phosphorylation were augmented in the lipin1-deficient mast cells. Moreover, inhibition of PKC activity reduced SNAP-23 phosphorylation and mast cell degranulation in lipin1-deficient mast cells. Together, our findings suggest that lipin1 may negatively control mast cell degranulation and the anaphylactic response through inhibiting the PKC-SNAP-23 pathway.

Full Text

Duke Authors

Cited Authors

  • Shin, J; Zhang, P; Wang, S; Wu, J; Guan, Z; Zhong, X-P

Published Date

  • January 2013

Published In

Volume / Issue

  • 43 / 1

Start / End Page

  • 240 - 248

PubMed ID

  • 23065777

Electronic International Standard Serial Number (EISSN)

  • 1521-4141

Digital Object Identifier (DOI)

  • 10.1002/eji.201242571

Language

  • eng

Conference Location

  • Germany