单位:[1]Huazhong Univ Sci & Technol,Key Lab Organ Transplantat,Tongji Hosp,Tongji Med Coll,Minist Educ,Natl Hlth Commiss,Inst Organ Transpla,Wuhan 430030,Peoples R China器官移植研究所华中科技大学同济医学院附属同济医院器官移植[2]Chinese Acad Med Sci, Wuhan 430030, Peoples R China[3]Anhui Med Univ, Affiliated Hosp 1, Dept Urol, Hefei 230000, Peoples R China
Disrupted redox homeostasis contributes to renal ischemia-reperfusion (IR) injury. Abundant natural products can activate nuclear factor erythroid-2-related factor 2 (Nrf2), thereby providing therapeutic benefits. Methyl eugenol (ME), an analog of the phenolic compound eugenol, has the ability to induce Nrf2 activity. In this study, we investigated the protective effects of ME against renal oxidative damage in vivo and in vitro. An IR-induced acute kidney injury (AKI) model was established in mice. ME (20 mg.kg(-1).d(-1), i.p.) was administered to mice on 5 consecutive days before IR surgery. We showed that ME administration significantly attenuated renal destruction, improved the survival rate, reduced excessive oxidative stress and inhibited mitochondria) lesions in AKI mice. We further demonstrated that ME administration significantly enhanced Nrf2 activity and increased the expression of downstream antioxidative molecules. Similar results were observed in vitro in hypoxia/reoxygenation (HR)-exposed proximal tubule epithelial cells following pretreatment with ME (40 mu mol.L-1). In both renal oxidative damage models, ME induced Nrf2 nuclear retention in tubular cells. Using specific inhibitors (CC and DIF-3) and molecular docking, we demonstrated that ME bound to the binding pocket of AMPK with high affinity and activated the AMPK/GSK3 beta axis, which in turn blocked the Nrf2 nuclear export signal. In addition, ME alleviated the development of renal fibrosis induced by nonfatal IR, which is frequently encountered in the clinic. In conclusion, we demonstrate that ME modulates the AMPK/GSK3 beta axis to regulate the cytoplasmic-nuclear translocation of Nrf2, resulting in Nrf2 nuclear retention and thereby enhancing antioxidant target gene transcription that protects the kidney from oxidative damage.
基金:
National Natural Science Foundation of China [82170772, 81873623, 81570678]; Major State Basic Research Development Program of China [2013CB530803]; Clinical Research Physician Program of Tongji Medical College, HUST; Non-Profit Central Research Institute Fund of Chinese Academy of Medical Sciences [2018PT32018]
第一作者单位:[1]Huazhong Univ Sci & Technol,Key Lab Organ Transplantat,Tongji Hosp,Tongji Med Coll,Minist Educ,Natl Hlth Commiss,Inst Organ Transpla,Wuhan 430030,Peoples R China[2]Chinese Acad Med Sci, Wuhan 430030, Peoples R China
通讯作者:
通讯机构:[1]Huazhong Univ Sci & Technol,Key Lab Organ Transplantat,Tongji Hosp,Tongji Med Coll,Minist Educ,Natl Hlth Commiss,Inst Organ Transpla,Wuhan 430030,Peoples R China[2]Chinese Acad Med Sci, Wuhan 430030, Peoples R China
推荐引用方式(GB/T 7714):
Kuang Bai-cheng,Wang Zhi-heng,Hou Shuai-heng,et al.Methyl eugenol protects the kidney from oxidative damage in mice by blocking the Nrf2 nuclear export signal through activation of the AMPK/GSK3β axis[J].ACTA PHARMACOLOGICA SINICA.2023,44(2):367-380.doi:10.1038/s41401-022-00942-2.
APA:
Kuang, Bai-cheng,Wang, Zhi-heng,Hou, Shuai-heng,Zhang, Ji,Wang, Meng-qin...&Gong, Nian-qiao.(2023).Methyl eugenol protects the kidney from oxidative damage in mice by blocking the Nrf2 nuclear export signal through activation of the AMPK/GSK3β axis.ACTA PHARMACOLOGICA SINICA,44,(2)
MLA:
Kuang, Bai-cheng,et al."Methyl eugenol protects the kidney from oxidative damage in mice by blocking the Nrf2 nuclear export signal through activation of the AMPK/GSK3β axis".ACTA PHARMACOLOGICA SINICA 44..2(2023):367-380