Mouse study: liver growth hormone receptor loss linked to aging phenotypes
In mice, removing the growth hormone receptor only in liver cells was associated with faster aging-related phenotypes, shorter lifespan and liver mitochondrial dysfunction; the abstract reports an association, not proof of cause in humans. [1]
Automatic summary · not editorially reviewed
The key findings
Mice lacking the growth hormone receptor specifically in hepatocytes showed accelerated aging-related phenotypes, including shortened lifespan. [1]
Elevated circulating growth hormone after liver receptor ablation mediated fat-liver crosstalk promoting adipose lipolysis and CD36-dependent hepatic steatosis. [1]
In mice, pharmacological PDK4 inhibition ameliorated the age-related pathologies induced by hepatocyte-specific receptor ablation. [1]
The source at a glance
- Study type / format
- Preclinical mouse study (abstract)
- Population / context
- Mice with the growth hormone receptor removed specifically in hepatocytes, plus naturally aged and high-fat-diet-fed mice.
- Summary based on
- Study abstract
- Original publication
- October 1, 2026
Liver-specific receptor knockout mice in this study
The study used mice in which the growth hormone receptor was removed specifically in hepatocytes, the main liver cells. These mice showed accelerated aging-related phenotypes: shortened lifespan, more cellular senescence, lower resilience to metabolic stress, cognitive decline, impaired bone mineralization and worsened inflammaging. The abstract describes these as phenotypes in the knockout mice; it does not report a human study.
Supporting source [1]
Raised GH, fat breakdown and fatty liver in the mice
After the liver receptor was removed, circulating growth hormone rose. According to the abstract, this mediated crosstalk between fat tissue and liver that promoted fat breakdown in adipose tissue and CD36-dependent hepatic steatosis, a fatty liver. Liver aging was also promoted, and age-related liver pathologies worsened in both naturally aged mice and mice fed a high-fat diet. These are described associations in mice, not established causes of human aging.
Supporting source [1]
Mitochondrial pathway and PDK4 inhibition in mice
Mechanistically, loss of the hepatic receptor reduced STAT5b phosphorylation and increased PPARγ expression. More PPARγ entering the nucleus activated transcription of Pdk4 and Cd36, which the abstract links to mitochondrial damage and ectopic lipid accumulation. The authors describe a self-amplifying cycle of dysregulated lipid metabolism and mitochondrial dysfunction. Pharmacological inhibition of PDK4 in living mice ameliorated the age-related pathologies induced by the receptor ablation.
Supporting source [1]
How to interpret this
This is an abstract; the full text was not reviewed. All findings come from mice, including knockout and high-fat-diet models, so they do not establish human lifespan or treatment effects. The abstract reports associations and proposed mechanisms, not proven causes of human aging.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Yang K, Jian Y, Pang F, Ying M, Yang Q, Liu N, Wang S, Wu Y. · europepmc.org · October 1, 2026