The Study
ERK1/2 Mediates Insulin Stimulation of Na,K-ATPase by Phosphorylation of the α-Subunit in Human Skeletal Muscle Cells*
This study looked at human muscle cells in a dish and saw that insulin seemed to turn on a protein called Na,K-ATPase by using another protein called ERK1/2. We can’t say for sure that one caused the other, or if this would happen in a real person — it’s just a clue from a lab experiment.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Insulin tells muscle cells to move special pumps to their surface so they can work better. These pumps help bring in nutrients and keep the cell charged, like a battery.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 53 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This helps explain how insulin supports muscle function, which is important for energy use and may relate to conditions like diabetes.
- 2Insulin made pumps more active and moved them to the cell surface.
- 3When scientists blocked a signal called ERK1/2, this didn’t happen.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Biological Chemistry
Year
2004
Authors
L. Al‐Khalili, O. Kotova, H. Tsuchida, I. Ehrén, E. Feraille, A. Krook, A. Chibalin
Related Content
Claims (5)
When insulin is present, it tells muscle cells to pump more sodium and potassium around, which creates a better environment for the cell to pull in more creatine — a compound that helps muscles store energy.
Insulin helps muscles pull in more creatine by boosting a cellular pump that creates the right conditions for creatine to get inside.
Insulin helps move certain proteins to the surface of human muscle cells and boosts their activity, and this seems to involve a specific cellular signaling process.
When a certain protein in human muscle cells is blocked, insulin can't turn on or move a key cellular pump that helps muscles work properly.
When insulin acts on human muscle cells, it turns on a switch (ERK1/2) that helps modify a specific protein (the sodium-potassium pump) at certain spots—this has been seen in lab tests using drugs and purified enzymes.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.