The Claim
Postnatal, muscle-specific inactivation of the myostatin gene in mice results in generalized muscular hypertrophy equivalent in magnitude to that seen in constitutive myostatin knockout mice, indicating that myostatin continues to regulate muscle mass beyond embryonic development.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When the myostatin gene is turned off specifically in the muscles of mice after birth, their muscles grow larger to the same extent as when the gene is turned off from conception, showing that myostatin controls muscle size after birth as well as during development.
See the scientific wording
Postnatal, muscle-specific inactivation of the myostatin gene in mice results in generalized muscular hypertrophy equivalent in magnitude to that seen in constitutive myostatin knockout mice, indicating that myostatin continues to regulate muscle mass beyond embryonic development.
Turning off the myostatin gene in adult muscle cells removes a natural brake on muscle growth, allowing muscle fibers to get bigger by making more protein and adding more nuclei, resulting in larger muscles.
What the research says
1 studyStudy: Modulating skeletal muscle mass by postnatal, muscle‐specific inactivation of the myostatin gene
Scientists turned off the myostatin gene only in adult mice’s muscles and found their muscles grew just as big as when the gene was turned off from birth. This proves myostatin controls muscle growth all through life, not just in babies.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.