2. Academic Validation
  3. Loss of TRIM24 promotes IL-10 expression via CBP/p300-dependent IFNβ1 transcription during macrophage activation

Loss of TRIM24 promotes IL-10 expression via CBP/p300-dependent IFNβ1 transcription during macrophage activation

  • Inflamm Res. 2023 Jun 16. doi: 10.1007/s00011-023-01751-x.
Zhaoyuan Hui # 1 2 3 4,  Yuanzheng Fu # 1 3,  Yunyun Chen # 1 3,  Jie Yin 1 3,  Hui Fang 1 3,  Yifan Tu 1 3,  Ying Gu 5 6 7 8,  Jiawei Zhang 9
Affiliations

Affiliations

  • 1 Cancer Institute, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.
  • 2 Department of Pathogenic Biology and Medical Immunology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China.
  • 3 Department of Genetics, Institute of Genetics, School of Medicine, Zhejiang University, Hangzhou, 310058, China.
  • 4 Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Yinchuan, 750004, China.
  • 5 Cancer Institute, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China. guyinghz@zju.edu.cn.
  • 6 Department of Genetics, Institute of Genetics, School of Medicine, Zhejiang University, Hangzhou, 310058, China. guyinghz@zju.edu.cn.
  • 7 Zhejiang Provincial Key Lab of Genetic and Developmental Disorder, Hangzhou, 310058, Zhejiang, China. guyinghz@zju.edu.cn.
  • 8 Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, 311121, China. guyinghz@zju.edu.cn.
  • 9 Cancer Institute, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China. jwzhang@zju.edu.cn.
  • # Contributed equally.
PMID: 37326695 DOI: 10.1007/s00011-023-01751-x
Abstract

Background: As an anti-inflammatory cytokine, interleukin 10 (IL-10) plays a vital role in preventing inflammatory and autoimmune pathologies while also maintaining immune homeostasis. IL-10 production in macrophages is tightly regulated by multiple pathways. TRIM24, a member of the Transcriptional Intermediary Factor 1 (TIF1) family, contributes to Antiviral immunity and macrophage M2 polarization. However, the role of TRIM24 in regulating IL-10 expression and its involvement in endotoxic shock remains unclear.

Methods: In vitro, bone marrow derived macrophages cultured with GM-CSF or M-CSF were stimulated with LPS (100ng/ml). Murine models of endotoxic shock were established by challenging the mice with different dose of LPS (i.p). RTPCR, RNA sequencing, ELISA and hematoxylin and eosin staining were performed to elucidate the role and mechanisms of TRIM24 in endotoxic shock.

Results: The expression of TRIM24 is downregulated in LPS-stimulated bone marrow-derived macrophages (BMDMs). Loss of TRIM24 boosted IL-10 expression during the late stage of LPS-stimulation in macrophages. RNA-seq analysis revealed the upregulation of IFNβ1, an upstream regulator of IL-10, in TRIM24 knockout macrophages. Treatment with C646, a CBP/p300 inhibitor, diminished the difference in both IFNβ1 and IL-10 expression between TRIM24 knockout and control macrophages. Loss of TRIM24 provided protection against LPS-induced endotoxic shock in mice.

Conclusion: Our results demonstrated that inhibiting TRIM24 promoted the expression of IFNβ1 and IL-10 during macrophage activation, therefore protecting mice from endotoxic shock. This study offers novel insights into the regulatory role of TRIM24 in IL-10 expression, making it a potentially attractive therapeutic target for inflammatory diseases.

Keywords

CBP/p300; IFNβ1; IL-10; TRIM24.

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