Pharmacological inhibition of HDAC6 suppresses NLRP3 inflammasome-mediated IL-1β release

被引:19
作者
Bockstiegel, Judith [1 ]
Wurnig, Silas L. [2 ]
Engelhardt, Jonas [1 ]
Enns, Jana [1 ]
Hansen, Finn K. [2 ]
Weindl, Guenther [1 ]
机构
[1] Univ Bonn, Pharmaceut Inst, Pharmacol & Toxicol, Gerhard Domagk Str 3, D-53121 Bonn, Germany
[2] Univ Bonn, Pharmaceut Inst, Pharmaceut & Cell Biol Chem, Immenburg 4, D-53121 Bonn, Germany
关键词
NLRP3; inflammasome; IL-1beta; HDAC6; inhibitors; SAHA; PROTACs; Human macrophages; HISTONE DEACETYLASE 6; ACTIVATION; CEREBLON; PROTACS; CANCER; TOOLS; MODEL;
D O I
10.1016/j.bcp.2023.115693
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
The nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing protein 3 (NLRP3) inflammasome is an important regulator of inflammation and immune responses. Histone deacetylase 6 (HDAC6) has been implicated in the assembly and activation of the NLRP3 inflammasome in mouse cells, however, the role in human immune cells remains poorly understood. Here, we investigated the effect of HDAC6 deficiency on NLRP3-mediated interleukin (IL)-1 ss release using proteolysis targeting chimeras (PROTAC) technology. We designed an HDAC6 PROTAC (A6) composed of the pan-HDAC inhibitor suberoylanilide hydroxamic acid (SAHA) and the E3 ligase ligand thalidomide and a control PROTAC (non-degrading control, nc-A6) that binds to HDAC6 but lacks the ability to induce HDAC6 degradation. A6 but not nc-A6 reduced HDAC6 levels in THP-1 macrophages without affecting cell viability. PROTAC A6 and nc-A6 significantly reduced the release of IL-1 ss in a concentration-dependent manner, suggesting that HDAC6 deficiency is not necessary for inhibition of NLRP3 inflammasome-mediated IL-1 ss release. We found that inhibition of the catalytic domain with HDAC inhibitor SAHA or the specific HDAC6 inhibitor tubastatin A is sufficient to reduce IL-1 ss release indicating that the enzymatic activity of HDAC6 is critical for NLRP3 inflammasome function. Mechanistically, the observed effects of HDAC6 inhibition on NLRP3-mediated inflammatory responses could be attributed to its interaction with Tolllike receptor (TLR) signaling. Tubastatin A did not affect IL-1 ss levels when added after TLR-mediated priming. Collectively, our findings indicate that HDAC6 inhibitors show potent anti-inflammatory activity and suppress IL1 ss release by human macrophages, independent of NLRP3 assembly and activation.
引用
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页数:9
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