Cited by 12Liver Disease Diagnosis and TreatmentLiver physiology and pathologyDiet, Metabolism, and Disease

Macrophage-specific PHGDH protects against MAFLD by suppressing TAK1

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Hu, Penghui, Shan, Xiao, Dong, Hongyuan, Yu, Sujun, Wang, Baochen, Xiong, Hui, Ji, Zemin, Jing, Weijia +9 more·2025·Cell Reports

Abstract

Metabolic dysfunction-associated fatty liver disease (MAFLD) is a progressive disease with only one approved treatment currently available. Hepatic phosphoglycerate dehydrogenase (PHGDH), the rate-limiting enzyme of the serine biosynthesis pathway, regulates MAFLD development. However, the role of macrophage PHGDH in MAFLD progression remains unclear. Here, we demonstrate that the lipotoxicity inducer palmitic acid (PA) significantly increases macrophage PHGDH expression and that PHGDH deficiency in macrophages promotes PA-induced inflammatory responses. Myeloid-specific PHGDH deficiency exacerbates MAFLD in mice. Mechanistically, tetrameric PHGDH binds to transforming growth factor-β-activated kinase 1 (TAK1) to inhibit its interaction with TAK1 binding protein 1 (TAB1), sequentially suppressing the activation of TAK1 and downstream NF-κB and MAPK signaling. Inhibition of TAK1 activation slows the development of metabolic dysfunction-associated steatohepatitis (MASH) caused by myeloid PHGDH knockout. Importantly, adeno-associated virus-mediated PHGDH overexpression in liver macrophages alleviates MAFLD in mice. Collectively, these results identify macrophage PHGDH as a promising therapeutic agent for MAFLD.

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Authors
Hu, P., Shan, X., Dong, H., Yu, S., Wang, B., Xiong, H., Ji, Z., Jing, W., Cui, Y., Li, Z., Zhou, Y., Wang, Z., Wang, J., Tang, J., Wang, T., Xie, K., & Yu, Q.
Affiliations
  • Tianjin Medical University General Hospital (CN)
  • University of Electronic Science and Technology of China (CN)
  • State Key Laboratory of Experimental Hematology (CN)
  • Tianjin Medical University Cancer Institute and Hospital (CN)
  • Tianjin Medical University (CN)
Corresponding author
  • Xie, Keliang
  • Yu, Qiujing
Venue
Cell Reports
Publisher
Elsevier BV
Published
2025-03
Volume
44
Issue
3
Pages
115426
ISSN
2211-1247 (ISSN-L)
OpenAlex
W4408495125
Cited by
12
References
61
Citations by year
2026: 6 · 2025: 6
FWCI
8.25
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (82300682, 32471218, 82273088, 82350116, 82402504)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
non-alcoholic fatty liver disease, serine biosynthesis, TAK1, TAB1, palmitic acid, lipotoxicity, myeloid-specific knockout, NF-κB signaling, MAPK signaling, nonalcoholic steatohepatitis, hepatic macrophages, AAV gene therapy, inflammation
MeSH terms
MAP Kinase Kinase Kinase 7, Animals, Fatty Liver, Humans, Liver, Macrophages, Male, Mice, Inbred C57BL, NF-kappa B, Mice, Knockout, Palmitic Acid, MAP Kinase Kinase Kinases, Phosphoglycerate Dehydrogenase, Mice

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