Cited by 41Pancreatitis Pathology and TreatmentFerroptosis and cancer prognosisPancreatic and Hepatic Oncology Research

Identification of AP-1 as a Critical Regulator of Glutathione Peroxidase 4 (GPX4) Transcriptional Suppression and Acinar Cell Ferroptosis in Acute Pancreatitis

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Ma, Xiaojie, Dong, Xiaowu, Xu, Yao, Ma, Nan, Wei, Mei, Xie, Xiaochun, Lu, Yingying, Cao, Wangsen +2 more·2022·Antioxidants

Abstract

Glutathione peroxidase 4 (GPX4)-dependent ferroptosis in pancreatic acinar cells plays a critical role in acute pancreatitis (AP). However, potential upstream regulators of GPX4 are not well defined. Here, we observed a marked reduction in acinar GPX4 expression and ferroptotic cell death in mice with cerulein-induced AP. To determine the critical factors involved in acinar cell ferroptosis, pancreas transcriptome data from an AP mouse model were analyzed and overlapped with predicted transcription factors of Gpx4, and an upregulated transcription factor active protein 1 (AP-1) protein, Jun, was identified. The administration of a specific ferroptosis inhibitor liproxstatin-1 alleviated AP pathology and significantly decreased Jun levels. Bioinformatic analysis indicated that the Gpx4 promoter contains a putative AP-1 binding site. Jun binds directly to the Gpx4 promoter and inhibits Gpx4 transcription under pancreatic conditions. AP-1 inhibition by a selective inhibitor SR11302 reversed GPX4 reduction and ameliorated AP pathology in a GPX4-dependent manner. Collectively, our study demonstrates that the downregulation of GPX4 by AP-1 is critical in the aggravation of acinar cell ferroptosis during the progression of AP. Strategies targeting the AP-1/GPX4 axis may be potentially effective for the prevention and treatment of AP.

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  • Several transcription factors including AP-1, CREB, ATF4, and NRF2 have been shown to regulate either directly or indirectly GPX4 levels in different cellular contexts.

    “Several transcription factors including AP-1 (60, 61), CREB (62, 63), ATF4 (64), and NRF2 (45, 65, 66) have been shown to regulate either directly or indirectly GPX4 levels in different cellular contexts.”

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Authors
Ma, X., Dong, X., Xu, Y., Ma, N., Wei, M., Xie, X., Lu, Y., Cao, W., Lu, G., & Li, W.
Affiliations
  • Nanjing General Hospital of Nanjing Military Command (CN)
  • Yangzhou University (CN)
Corresponding author
  • Lu, Guotao
  • Li, Weiqin
Venue
Antioxidants
Publisher
MDPI AG
Published
2022-12-31
Volume
12
Issue
1
Pages
100
ISSN
2076-3921 (ISSN-L)
OpenAlex
W4313388985
Cited by
41
References
55
Citations by year
2026: 13 · 2025: 11 · 2024: 10 · 2023: 7
FWCI
6.69
Type
journal article
Language
en
Open access
Locations
  • Antioxidants (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Natural Science Foundation of China (81870441, 82070668, 82070669)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatitis Pathology and Treatment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Ferroptosis and cancer prognosis
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
Keywords
acute pancreatitis, ferroptosis, GPX4, AP-1, JUN transcription factor, acinar cells, transcriptional regulation, liproxstatin-1, cerulein-induced pancreatitis, transcription factor binding sites

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