1. Academic Validation
  2. The miR-17∼92 miRNAs promote plasma cell differentiation by suppressing SOCS3-mediated NIK degradation

The miR-17∼92 miRNAs promote plasma cell differentiation by suppressing SOCS3-mediated NIK degradation

  • Cell Rep. 2023 Aug 13;42(8):112968. doi: 10.1016/j.celrep.2023.112968.
Jun Xie 1 Ying Du 1 Dewang Liu 1 Jianfeng Wu 1 Kang Yang 1 Xiaoyu He 1 Jiayi Zhao 1 Peicheng Hong 1 Kunyu Liao 1 Huanrong Zhang 1 Yazhen Hong 1 John R Teijaro 2 Seung Goo Kang 3 Changchun Xiao 4 Wen-Hsien Liu 5
Affiliations

Affiliations

  • 1 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China.
  • 2 Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA.
  • 3 Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA; Division of Biomedical Convergence/Institute of Bioscience and Biotechnology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea. Electronic address: sgkang@kangwon.ac.kr.
  • 4 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China; Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA. Electronic address: cxiao@scripps.edu.
  • 5 State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China. Electronic address: whliu@xmu.edu.cn.
Abstract

The miR-17∼92 family MicroRNAs (miRNAs) play a key role in germinal center (GC) reaction through promoting T follicular helper (TFH) cell differentiation. It remains unclear whether they also have intrinsic functions in B cell differentiation and function. Here we show that mice with B cell-specific deletion of the miR-17∼92 family exhibit impaired GC reaction, plasma cell differentiation, and antibody production in response to protein antigen immunization and chronic viral Infection. Employing CRISPR-mediated functional screening, we identify Socs3 as a key functional target of miR-17∼92 in regulating plasma cell differentiation. Mechanistically, SOCS3, whose expression is elevated in miR-17∼92 family-deficient B cells, interacts with NIK and promotes its ubiquitination and degradation, thereby impairing NF-κB signaling and plasma cell differentiation. This moderate increase in SOCS3 expression has little effect on IL-21-STAT3 signaling. Our study demonstrates differential sensitivity of two key signaling pathways to alterations in the protein level of an miRNA target gene.

Keywords

CP: Immunology; CP: Molecular biology.

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