摘要
Ulcerative colitis(UC)is characterized by chronic relapsing intestinal inflammation.Currently,there is no effective treatment for the disease.According to our preliminary data,1,8-cineole,which is the main active compound of Amomum compactum Sol.ex Maton volatile oil and an effective drug for the treatment of pneumonia,showed remarkable anti-inflammatory effects on colitis pathogenesis.However,its mechanism of action and direct targets remain unclear.This study investigated the direct targets and mechanism through which 1,8-cineole exerts its anti-inflammatory effects using a dextran sulfate sodium salt-induced colitis mouse model.The effects of 1,8-cineole on macrophage polarization were investigated using activated bone marrow-derived macrophages and RAW264.7 cells.In addition,1,8-cineole targets were revealed by drug affinity responsive target stability,thermal shift assay,cellular thermal shift assay,and heat shock protein 90(HSP90)adenosine triphosphatases(ATPase)activity assays.The results showed that 1,8-cineole exhibited powerful anti-inflammatory properties in vitro and in vivo by inhibiting the macrophage M1 polarization and protecting intestinal barrier function.Mechanistically,1,8-cineole directly interacted with HSP90 and decreased its ATPase activity,also inhibited nucleotide-binding and oligomerization domain-,leucine rich repeat-,and pyrin domain-containing 3(NLRP3)binding to HSP90 and suppressor of G-two allele of SKP1(SGT1)and suppressed NLRP3 inflammasome activation in macrophages.These results demonstrated that 1,8-cineole is a potential drug candidate for UC treatment.
基金
supported by the National Natural Science Foundation of China(Grant Nos.:81830114,82004232,82174253,and 82104707)
Guangdong Basic and Applied Basic Research Foundation,China(Grant Nos.:2021A1515011215 and 2022A1515110827)
Guangzhou Basic and Applied Basic Research Foundation,China(Grant No.:2023A1515011149)
China Postdoctoral Science Foundation(Grant Nos.:2020M683206 and 2021M701443)
the Key Area Research and Development Program of Guangdong Province,China(Grant No.:2020B1111100010)
Guangzhou Key Laboratory of Formula-Pattern of Traditional Chinese Medicine,China(Grant No.:202102010014)
the Cross-disciplinary Special Project of Jinan University,China(Grant No.:21621115)
the State Key Laboratory of Dampness Syndrome of Chinese Medicine,China(Grant No.:SZ2021KF13)
the Outstanding Innovative Talents Cultivation Funded Programs for Doctoral Students of Jinan University,China(Grant No.:2021CXB024).
