AMP-activated protein kinase: An energy sensor and survival mechanism in the reinstatement of metabolic homeostasis.
Level 5 - mechanism / opinion, no new human data
Narrative review of biological mechanisms with no original human empirical data.
PubMed 37127064 · doi:10.1016/j.yexcr.2023.113614
What was done
This paper is a narrative review detailing the signaling pathways and activation mechanisms of AMP-activated protein kinase (AMPK), including canonical and non-canonical upstream activation, downstream transcriptional regulation, and its control over autophagy and mitochondrial homeostasis.
What was found
The abstract reports qualitative mechanistic pathways without quantitative data or statistics. It details that AMPK activation occurs via increased AMP/ATP or ADP ratios as well as glucose starvation. Upon activation, AMPK promotes ATP-generating processes (such as fatty acid oxidation) and inhibits non-essential ATP-consuming processes (such as protein and triglyceride synthesis and cell proliferation). It also coordinates cellular stress and inflammatory responses via Nrf2, SIRT1, FoxO stimulation, NF-κB inhibition, and directs autophagy and mitophagy through mTOR and ULK1 signaling.
Why it matters
It outlines how AMPK operates as an energy sensor to restore metabolic balance, offering a comprehensive framework for how cellular stress responses, mitochondrial quality control, and housekeeping pathways are integrated.
Limits
The paper is a descriptive narrative review that presents biological mechanisms rather than empirical trial data. The abstract provides no quantitative effect sizes, systematic search methodology, or human clinical outcome measurements.
Cited by
- supports AMP kinase acts as a metabolic sensor measuring AMP to ATP ratios and triggers mitophagy and autophagy.