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Krüppel-like factor 15 ameliorates alcohol-induced liver injury in mice via regulation of the PFKFB3/AKT axis

Abstract

Alcohol-associated liver disease (ALD) remains a predominant cause of chronic hepatic pathology, and effective therapeutic strategies are needed. Krüppel-like factor 15 (KLF15) is a member of the KLF family of zinc-finger transcription factors and is ubiquitously expressed in metabolically active tissues, with a particularly high abundance in the liver. KLF15 has been implicated in various hepatic disorders. In this study, we investigated the pathophysiological role of KLF15 in ALD. We established a National Institute on Alcohol Abuse and Alcoholism (NIAAA) model in mice by feeding them an ethanol Lieber–DeCarli liquid diet containing 5% (vol/vol) ethanol for 10 days. EtOH-fed mice were administered binge ethanol gavage (5 g/kg, body weight) on D11. We observed that the expression levels of KLF15 were significantly decreased in the livers of ALD patients and model mice. Overexpression of KLF15 conferred substantial protective effects in EtOH-fed mice, as evidenced by attenuated hepatic injury, apoptosis, steatosis and inflammation. In ethanol-treated AML-12 cells, overexpression of KLF15 reduced apoptosis and steatosis, whereas KLF15 knockdown exacerbated these pathological features. By performing RNA-seq and bioinformatics analyses, we observed that KLF15 regulated the AKT pathway by directly binding to the PFKFB3 promoter (−128 to −121). The physical interaction between PFKFB3 and AKT1 was further verified by Co-IP and molecular docking. These results suggest that KLF15 is a pivotal regulator of ALD pathogenesis through modulation of the PFKFB3/AKT axis, highlighting its potential as a novel therapeutic target for ALD intervention.

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Fig. 1: Hepatic KLF15 expression is decreased in ALD patients and mouse models of ALD.
Fig. 2: KLF15 expression is regulated by the inflammatory response.
Fig. 3: KLF15 overexpression ameliorates ethanol-induced liver injury.
Fig. 4: Overexpression of KLF15 alleviates lipid deposition and apoptosis in ethanol-induced AML-12 cells.
Fig. 5: KLF15 knockdown exacerbates lipid deposition and apoptosis in ethanol-induced AML-12 cells.
Fig. 6: KLF15 mitigates ethanol-induced liver injury by regulating the PI3K/AKT pathway.
Fig. 7: KLF15 inhibits the transcription of PFKFB3 by binding to its promoter.
Fig. 8: PFKFB3 binds to AKT1 in AML-12 cells.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 82400205), the Pharmaceutical Innovative Fund of Anhui Medical University (YXCX202210) and the Natural Science Projects for Colleges and Universities in Anhui Province (2022AH051163).

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HC, LY and XFL designed and performed this research, performed the experiments and wrote the manuscript; SYH, QZ and RCX participated in data processing; ZYO analysed the software data and methodology; LF and YD supervised the experiments. All the authors read and approved the manuscript.

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Correspondence to Ling Fang or Yan Du.

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Chen, H., Yang, L., Li, Xf. et al. Krüppel-like factor 15 ameliorates alcohol-induced liver injury in mice via regulation of the PFKFB3/AKT axis. Acta Pharmacol Sin (2025). https://doi.org/10.1038/s41401-025-01651-2

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