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Updated: Jan 8, 2026
09:37
A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
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ARMH4 accelerates aging by maintaining a positive-feedback growth signaling circuit
Yu Fang1,2, Baosen Wang2,3,4, Qiuxiao Guo1,2
1State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Nature Communications
|December 13, 2025
Summary
Deleting the ARMH4 gene significantly extends lifespan and delays aging in mice. This research identifies ARMH4 as a key regulator of aging, offering potential anti-aging strategies for a growing elderly population.
Area of Science:
- Gerontology and aging research
- Molecular biology and genetics
- Biochemistry and cellular signaling
Background:
- Aging is a complex process involving chronological changes across multiple organs.
- An increasing elderly population highlights the need for effective anti-aging interventions.
- Previous proteomics studies identified age-related downregulation of ARMH4 in healthy individuals.
Purpose of the Study:
- To investigate the systemic effects of whole-body Armh4 knockout on aging processes.
- To determine the impact of Armh4 deficiency on lifespan, mortality, and age-related pathologies.
- To elucidate the molecular mechanisms by which ARMH4 influences aging.
Main Methods:
- Generation of a whole-body Armh4-knockout mouse model.
- Assessment of lifespan, spontaneous mortality, and sexual maturity in knockout mice.
- Histopathological analysis of major organs (heart, liver, kidney, spleen) to evaluate age-related pathologies.
- Investigation of molecular pathways, including protein synthesis, autophagy, and signaling cascades (PI3K-Akt-mTORC1, Ras-MEK-ERK).
- Analysis of protein-protein interactions and gene expression regulation involving ARMH4, IGF1R, FGFR1, and c-Myc.
Main Results:
- Armh4 deficiency significantly reduced spontaneous mortality and extended maximum lifespan in mice.
- Female mice lacking Armh4 exhibited a one-week delay in sexual maturity.
- Age-related pathologies in the heart, liver, kidney, and spleen were substantially alleviated in Armh4-knockout mice.
- Mechanistically, ARMH4 was found to interact with IGF1R/FGFR1, sensitizing PI3K-Akt-mTORC1 and Ras-MEK-ERK pathways.
- ARMH4 is essential for maintaining IGF1R/FGFR1 expression via regulation of c-Myc, promoting protein synthesis and inhibiting autophagy.
Conclusions:
- ARMH4 acts as a positive regulator of aging by promoting growth signaling pathways.
- Deletion of ARMH4 alleviates age-related organ damage and extends lifespan.
- Targeting ARMH4 may offer a novel therapeutic strategy for combating age-associated diseases and promoting longevity.
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