Estrogen receptor regulates immune defense by suppressing NF-κB signaling in the Crassostrea hongkongensis
Estrogen receptor regulates immune defense by suppressing NF-κB signaling in the Crassostrea hongkongensis
复制标题
雌激素受体通过抑制香港巨牡蛎中的 NF-κB 信号调节免疫防御
DOI：
10.1016/j.fsi.2020.08.038
复制
发表时间：
2020-11-01
影响因子：
4.7
通讯作者：
Zeng, Manhong
中科院分区：
文献类型：
--
作者：
Chen, Dongbo;Li, Qiuhong;Zeng, Manhong
The crosstalk between the estrogen receptor (ER) and NF-kappa B signalling pathways has merged in vertebrates and plays a key role in the control of genes involved in inflammation, cell proliferation and apoptosis. However, such crosstalk between the endocrine and immune systems needs to be explored in lower invertebrates. In this study, we identified a 2856-bp homologue of the estrogen receptor from Hong Kong oyster (ChER), containing a 5' untranslated region (UTR) of 234 bp, a 3' UTR of 387 bp, and an open reading frame (ORF) of 2235 bp. We observed that overexpression of ChER suppressed ChRel-dependent NF-kappaB (NF-kappa B) activation in the HEK293T (human embryonic kidney 293T) cell line, and depletion of ChER in vivo resulted in upregulation of two NF-kappa B-responsive marker genes, namely, TNF-alpha and IL-17, which confirmed its potential role in controlling NF-kappa B signalling. Furthermore, an EMSA (electrophoretic mobility shift assay) showed that ChER could negatively regulate the binding of ChRel to NF-kappa B probe-responsive elements. Serial domain requirement analysis showed that both region C (DNA-binding domain) and region E (ligand-binding domain) of ChER were essential for mediating the crosstalk underlying ChER-dependent NF-kappa B suppression. In conclusion, we demonstrate for the first time the negative regulatory role of the ER in NF-kappa B signalling in oysters, strongly indicating the presence of complex crosstalk between the endocrine and immune systems in lower marine molluscs.
