单位:[1]Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA.[2]Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA.[3]Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.临床科室国家中心消化分中心消化内科首都医科大学附属北京友谊医院[4]Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.[5]Department of Veterans Affairs, Miami Healthcare System, Miami, FL 33136, USA.
Esophageal adenocarcinoma (EAC), the predominant type of esophageal cancer in the United States, develops through Barrett's esophagus (BE)-dysplasia-carcinoma cascade. Gastroesophageal reflux disease, where acidic bile salts refluxate into the esophagus, is the main risk factor for the development of BE and its progression to EAC. The NFE2-related factor 2 (NRF2) is the master cellular antioxidant regulator. We detected high NRF2 protein levels in the EAC cell lines and primary tissues. Knockdown of NRF2 significantly enhanced acidic bile salt-induced oxidative stress, DNA damage, and inhibited EAC cell growth. Brusatol, an NRF2 inhibitor, significantly inhibited NRF2 transcriptional activity and downregulated the NRF2 target genes. We discovered that in addition to inducing apoptosis, Brusatol alone or in combination with cisplatin (CDDP) induced significant lipid peroxidation and ferroptosis, as evidenced by reduced xCT and GPX4 expression, two known ferroptosis markers. The combination of Brusatol and CDDP significantly inhibited EAC tumor xenograft growth in vivo and confirmed the in vitro data showing ferroptosis as an important mechanism in the tumors treated with Brusatol or Brusatol and CDDP combination. Our data support the role of NRF2 in protecting against stress-induced apoptosis and ferroptosis in EACs. Targeting NRF2 in combination with platinum therapy can be an effective strategy for eliminating cancer cells in EAC.
基金:
This study was supported by grants from the U.S. National Institutes of Health (R01CA206563
and R01CA224366) and the U.S. Department of Veterans Affairs (1IK6BX003787 and I01BX001179).
The use of the Sylvester Shared Resources (Flow Cytometry and Biostatistics) was supported by the
NCI-funded Sylvester Comprehensive Cancer Center (P30CA240139). The content of this work is
solely the responsibility of the authors. It does not necessarily represent the official views of the
Department of National Institutes of Health, Veterans Affairs, or the University of Miami
第一作者单位:[1]Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
通讯作者:
通讯机构:[1]Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA.[2]Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA.[5]Department of Veterans Affairs, Miami Healthcare System, Miami, FL 33136, USA.
推荐引用方式(GB/T 7714):
Ballout Farah,Lu Heng,Chen Zheng,et al.Targeting NRF2 Sensitizes Esophageal Adenocarcinoma Cells to Cisplatin through Induction of Ferroptosis and Apoptosis[J].Antioxidants (Basel, Switzerland).2022,11(10):doi:10.3390/antiox11101859.
APA:
Ballout Farah,Lu Heng,Chen Zheng,Hu Tianling,Chen Lei...&Peng Dunfa.(2022).Targeting NRF2 Sensitizes Esophageal Adenocarcinoma Cells to Cisplatin through Induction of Ferroptosis and Apoptosis.Antioxidants (Basel, Switzerland),11,(10)
MLA:
Ballout Farah,et al."Targeting NRF2 Sensitizes Esophageal Adenocarcinoma Cells to Cisplatin through Induction of Ferroptosis and Apoptosis".Antioxidants (Basel, Switzerland) 11..10(2022)