通过DcR3抑制NF-κB和下游XBP1,有助于降低抗体分泌
Po-Chun Liu1, Szu-Ying Huang1, Kuo-I Lin2
1Institute of Microbiology and Immunology, National Yang Ming Chiao Tung University, Taipei City, Taiwan.
Journal of immunology (Baltimore, Md. : 1950)
|March 12, 2025
概括
诱惑受体3 (DcR3) 通过降低B细胞中的X盒结合蛋白1 (XBP1) 表达来损害抗体的产生. 这种机制涉及抑制NF-κB激活,最终降低抗体分泌.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 诱受体3 (DcR3) 是一种可溶性受体,调节免疫细胞功能.
- 已知DcR3可以抑制B细胞增殖并改善自身免疫性疾病.
- DcR3在调节抗体产生中的确切作用尚不清楚.
研究的目的:
- 研究DcR3调节抗体生成的机制.
- 为了确定DcR3是否影响T细胞依赖性抗体反应.
- 阐明参与DcR3介导的抗体分泌调节的分子途径.
主要方法:
- 在体内研究中使用了DcR3转基因小鼠模型.
- 使用DcR3-Fc与B细胞融合蛋白进行了体外试验.
- 评估了T细胞依赖性抗体反应,B细胞增殖和抗体分泌.
- 分析了分泌Igh,Xbp1和NF-κB活动的表达.
- 研究了X盒结合蛋白1 (XBP1) 在DcR3中介作用中的作用.
主要成果:
- DcR3转基因小鼠表现出受损的T细胞依赖抗体反应.
- 在体外,DcR3-Fc融合蛋白减弱的T细胞依赖抗体的产生.
- 在激活的B细胞中,DcR3-Fc减少了分泌Igh和Xbp1的表达.
- DcR3-Fc抑制了NF-κB活性和XBP1促进体活性,这对Xbp1表达至关重要.
- 恢复拼接的XBP1部分挽救了抗体生产缺陷.
结论:
- DcR3通过抑制NF-κB激活和随后在B细胞中的XBP1表达,损害了抗体的产生.
- 这种XBP1的减少导致抗体分泌的减少,无论是体外还是体内.
- DcR3的作用超出了抑制增殖的范围,直接影响抗体生产机制.
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