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Innate scavenger receptor-A regulates adaptive T helper cell responses to pathogen infection.


ABSTRACT: The pattern recognition receptor (PRR) scavenger receptor class A (SR-A) has an important function in the pathogenesis of non-infectious diseases and in innate immune responses to pathogen infections. However, little is known about the role of SR-A in the host adaptive immune responses to pathogen infection. Here we show with mouse models of helminth Schistosoma japonicum infection and heat-inactivated Mycobacterium tuberculosis stimulation that SR-A is regulated by pathogens and suppresses IRF5 nuclear translocation by direct interaction. Reduced abundance of nuclear IRF5 shifts macrophage polarization from M1 towards M2, which subsequently switches T-helper responses from type 1 to type 2. Our study identifies a role for SR-A as an innate PRR in regulating adaptive immune responses.

SUBMITTER: Xu Z 

PROVIDER: S-EPMC5508227 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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Innate scavenger receptor-A regulates adaptive T helper cell responses to pathogen infection.

Xu Zhipeng Z   Xu Lei L   Li Wei W   Jin Xin X   Song Xian X   Chen Xiaojun X   Zhu Jifeng J   Zhou Sha S   Li Yong Y   Zhang Weiwei W   Dong Xiaoxiao X   Yang Xiaowei X   Liu Feng F   Bai Hui H   Chen Qi Q   Su Chuan C  

Nature communications 20170711


The pattern recognition receptor (PRR) scavenger receptor class A (SR-A) has an important function in the pathogenesis of non-infectious diseases and in innate immune responses to pathogen infections. However, little is known about the role of SR-A in the host adaptive immune responses to pathogen infection. Here we show with mouse models of helminth Schistosoma japonicum infection and heat-inactivated Mycobacterium tuberculosis stimulation that SR-A is regulated by pathogens and suppresses IRF5  ...[more]

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