Liver Regeneration Mechanisms in Metabolic Disorders

The liver’s remarkable regenerative capacity relies on a tightly orchestrated sequence of cellular and molecular events, typically described as priming, proliferation and termination. In metabolic disorders—such as non-alcoholic fatty liver disease and metabolic dysfunction-associated steatotic liver disease—chronic lipid accumulation, inflammation and altered energy homeostasis disrupt these phases. Excessive triglyceride storage within hepatocytes impairs the initial priming signals, skews cell-death pathways towards necroptosis and attenuates the proliferative response. Concomitantly, metabolic stress induces epigenetic reprogramming and translational control mechanisms that can either facilitate or hinder hepatocyte cell-cycle progression. Systemic factors, including adipose-derived lipids and paracrine signals from immune and stromal cells, further modulate hepatocyte proliferation and hypertrophy. Understanding these interlinked pathways is essential to developing targeted therapies that restore regenerative competence in patients with steatotic or metabolic liver injury, thereby reducing post-resection complications and improving outcomes in liver surgery and acute liver failure.

Research from Nature Portfolio

Recent studies have uncovered how metabolic cues direct regenerative gene programmes through non-canonical mechanisms. One investigation revealed that a shift from apoptosis to necroptosis during severe steatosis is orchestrated by the transcription factor ATF3, which upregulates RIPK3 and amplifies programmed necrotic signalling, thereby impairing effective regeneration. Manipulation of ATF3 levels in animal models demonstrated reversible control of cell-death modality and suggested a potential therapeutic axis for steatosis-induced damage. Another study identified an epigenetic regulator, MIER1, as a critical link between acute lipid accumulation and hepatocyte proliferation. Lipid-induced phosphorylation of the translation initiation factor EIF2S1 suppresses MIER1 synthesis, relieving chromatin-based repression of cell-cycle genes. In chronic steatosis, dysfunction of this lipid–EIF2S1–MIER1 axis underlies defective regeneration, while MIER1 depletion restores proliferative capacity, highlighting a translational checkpoint as a druggable target.

Liver Regeneration Mechanisms in Metabolic Disorders publication trend

The graph below shows the total number of articles in liver regeneration mechanisms in metabolic disorders across all publications each year (not limited to Nature Index journals).

Technical terms

Hepatocyte: A liver parenchymal cell responsible for metabolism, detoxification and regeneration.

Hepatic steatosis: Excessive accumulation of fat, predominantly triglycerides, within hepatocytes.

Necroptosis: A regulated form of necrotic cell death mediated by RIPK3 and MLKL signalling.

Partial hepatectomy: Surgical removal of a portion of the liver used experimentally to study regeneration.

Epigenetic regulator: A molecule that modulates gene expression through chromatin remodelling without altering DNA sequence.

Mesenchymal stem cell-conditioned medium (MSC-CM): A solution containing secreted factors from cultured mesenchymal stem cells that can influence tissue repair.

Transient regeneration-associated steatosis (TRAS): A temporary phase of lipid accumulation in the regenerating liver that fuels cell proliferation.

References

1. The transcription factor ATF3 switches cell death from apoptosis to necroptosis in hepatic steatosis in male mice. Nature Communications (2023).
2. Acute liver steatosis translationally controls the epigenetic regulator MIER1 to promote liver regeneration in a study with male mice. Nature Communications (2023).
3. Adipose tissue deficiency impairs transient lipid accumulation and delays liver regeneration following partial hepatectomy in male Seipin knockout mice. Clinical and Translational Medicine (2025).
4. Controlled release of hydrogel-encapsulated mesenchymal stem cells-conditioned medium promotes functional liver regeneration after hepatectomy in metabolic dysfunction-associated steatotic liver disease. Stem Cell Research & Therapy (2024).
5. L-carnitine promotes liver regeneration after hepatectomy by enhancing lipid metabolism. Journal of Translational Medicine (2023).