The Study
Modulating skeletal muscle mass by postnatal, muscle‐specific inactivation of the myostatin gene
This study looked at mice and changed one gene to see what happened to their muscles. It showed that the muscles got bigger, but it didn't compare them to other mice or prove the gene change caused it. So we can only say 'this happened' — not 'this caused that'.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
Scientists turned off a gene called myostatin in baby mice after they were born, and their muscles grew as big as in mice that had the gene turned off from birth.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 56 / 100
Quality score
A snapshot of a population at a single point in time. Can identify correlations and prevalence, but cannot determine the direction of cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — if this works similarly in humans, it could help people with muscle wasting diseases grow more muscle.
- 2Muscle growth after postnatal gene inactivation was equal to growth in mice with the gene turned off from conception.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
genesis
Year
2003
Authors
L. Grobet, Dimitri Pirottin, F. Farnir, D. Poncelet, Luis Jose Royo, B. Brouwers, E. Christians, D. Desmecht, F. Coignoul, R. Kahn, M. Georges
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.