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Author Spotlight: Exploring the Role of Inflammation in the Co-occurrence of Primary Sjogren's Syndrome and Lung Adenocarcinoma
Published on: September 20, 2024
SENP1 regulates IFN-γ-STAT1 signaling through STAT3-SOCS3 negative feedback loop
Tingting Yu1,2,3, Yong Zuo1,2, Rong Cai1,2
1Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
SENP1 regulates macrophage inflammation by controlling the balance between STAT1 and STAT3 signaling pathways. This balance is crucial for M1 macrophage activation and effective resistance to Listeria monocytogenes infection.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Interferon-gamma (IFN-γ) signaling activates macrophages for inflammation via JAK-STAT1.
- Negative regulators like SOCS1 and PTPs modulate IFN-γ signaling.
- Macrophage polarization is critical for immune responses.
Purpose of the Study:
- To identify novel regulators of IFN-γ signaling in macrophages.
- To elucidate the role of SENP1 in macrophage activation and polarization.
- To investigate the interplay between STAT1, STAT3, SOCS3, and PTP1B.
Main Methods:
- Macrophage culture and stimulation with IFN-γ.
- Analysis of JAK-STAT signaling pathways (STAT1, STAT3).
- Assessment of protein SUMOylation and de-SUMOylation (SENP1, PTP1B).
- Gene expression analysis (SOCS3).
- Bacterial infection model (Listeria monocytogenes).
Main Results:
- SENP1 deficiency impairs IFN-γ signaling and M1 macrophage activation.
- SENP1 controls PTP1B de-SUMOylation, affecting STAT3 phosphorylation.
- Activated STAT3 in SENP1-deficient macrophages induces SOCS3, suppressing STAT1.
- SENP1-deficient macrophages exhibit reduced resistance to Listeria monocytogenes.
Conclusions:
- A novel SENP1-mediated negative feedback loop involving STAT3-SOCS3 regulates IFN-γ signaling.
- SENP1 is essential for maintaining the STAT1/STAT3 balance required for M1 polarization.
- SENP1 plays a critical role in macrophage-mediated immunity and host defense.
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