2. Academic Validation
  3. Ketogenesis acts as an endogenous protective programme to restrain inflammatory macrophage activation during acute pancreatitis

Ketogenesis acts as an endogenous protective programme to restrain inflammatory macrophage activation during acute pancreatitis

  • EBioMedicine. 2022 Apr;78:103959. doi: 10.1016/j.ebiom.2022.103959.
Li Zhang 1,  Juanjuan Shi 1,  Dan Du 2,  Ningning Niu 1,  Shiyu Liu 3,  Xiaotong Yang 1,  Ping Lu 1,  Xuqing Shen 1,  Na Shi 3,  Linbo Yao 3,  Ruling Zhang 4,  Guoyong Hu 4,  Guotao Lu 5,  Qingtian Zhu 5,  Tao Zeng 6,  Tingting Liu 3,  Qing Xia 3,  Wei Huang 7,  Jing Xue 8
Affiliations

Affiliations

  • 1 State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Centre, Shanghai Cancer Institute, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Rd, Shanghai 200127 China.
  • 2 Department and Laboratory of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research Centre, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China; Advanced Mass Spectrometry Centre, Research Core Facility, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China.
  • 3 Department and Laboratory of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research Centre, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China.
  • 4 Shanghai Key Laboratory of Pancreatic Disease, Institute of Pancreatic Disease, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
  • 5 Department of Gastroenterology, Pancreatic Centre, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225001, China.
  • 6 Zhangjiang Laboratory, Institute of Brain-Intelligence Technology, Shanghai, China.
  • 7 Department and Laboratory of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research Centre, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China; Institutes for Systems Genetics & Immunology and Inflammation, Frontiers Science Centre for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China. Electronic address: [email protected].
  • 8 State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Centre, Shanghai Cancer Institute, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Rd, Shanghai 200127 China. Electronic address: [email protected].
PMID: 35339899 DOI: 10.1016/j.ebiom.2022.103959
Abstract

Background: Innate immunity and metabolites link to the pathogenesis and severity of acute pancreatitis (AP). However, liver metabolism and its role in immune response and AP progression remain elusive. We investigated the function of liver metabolism in the pathogenesis of AP.

Methods: Circulating ketone body β-hydroxybutyrate (βOHB) levels were determined in AP clinical cohorts and caerulein-induced AP (CER-AP) mouse models receiving seven (Cer*7) or twelve (Cer*12) injection regimens at hourly intervals. Liver transcriptomics and metabolomics were compared between CER-AP (Cer*7) and CER-AP (Cer*12). Inhibition of fatty acid β-oxidation (FAO)-ketogenesis, or supplementation of βOHB was performed in mouse models of AP. The effect and mechanism of βOHB were examined in vitro.

Findings: Elevated circulating βOHB was observed in patients with non-severe AP (SAP) but not SAP. These findings were replicated in CER-AP (Cer*7) and CER-AP (Cer*12), which manifested as limited and hyperactive immune responses, respectively. FAO-ketogenesis was activated in CER-AP (Cer*7), while impaired long-chain FAO and mitochondrial function were observed in the liver of CER-AP (Cer*12). Blockage of FAO-ketogenesis (Cpt1a antagonism or Hmgcs2 knockdown) worsened, while supplementation of βOHB or its precursor 1,3-butanediol alleviated the severity of CER-AP. Mechanistically, βOHB had a discernible effect on pancreatic acinar cell damage, instead, it greatly attenuated the activation of pancreatic and systemic proinflammatory macrophages via class I histone deacetylases.

Interpretation: Our findings reveal that hepatic ketogenesis is activated as an endogenous protective programme to restrain AP progression, indicating its potential therapeutic value.

Funding: This work was supported by the National Natural Science Foundation of China, Shanghai Youth Talent Support Programme, and Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant.

Keywords

Acute pancreatitis; Class I HDACs; Fatty acid β-oxidation; Macrophage; β-Hydroxybutyrate.

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