The alternatively spliced porcine FcγRI regulated PRRSV-ADE infection and proinflammatory cytokine production.

Abstract:

:Receptors for the Fc region of IgG (FcγRs) play a key role in protecting the immune system and host from infection. In this study, we described the cloning, sequencing and characterization of porcine FcγRI, and reported six different FcγRI isoforms, four of which have never been reported before. Further analysis revealed that FcγR isoforms are generated by alternative splicing mechanisms, including two membrane isoforms and four soluble isoforms. Importantly, we found FcγRI splice variants differentially influence PRRSV antibody-dependent enhancement (ADE) effects. Membrane pCD64-T1 promotes endocytosis of the PRRSV-antibody complex to enhance PRRSV replication, and soluble pCD64-T3 has no ADE effect on PRRSV proliferation, but shows an inflammation enhancement effect. The differential expression of selective splicing in primary PAM cells and 3D4/21 cell lines are altered and regulated by PRRSV infection and inflammatory environment. Our results indicated that porcine FcγRI plays dual regulatory roles in PRRSV multiplication and PRRSV inflammation process by the alternatively spliced mechanism, which will be a new target in PRRSV prevention and control.

journal_name

Dev Comp Immunol

authors

Shi P,Su Y,Li Y,Zhang L,Lu D,Li R,Zhang L,Huang J

doi

10.1016/j.dci.2018.09.019

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

186-198

eissn

0145-305X

issn

1879-0089

pii

S0145-305X(18)30442-7

journal_volume

90

pub_type

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