Developmental Programming and Postnatal Modulations of Muscle Development in Ruminants.
Level 5 - mechanism / opinion, no new human data
Narrative review of animal biology and livestock mechanisms (Level 5 by design analogy)
PubMed 40906073 · doi:10.3390/biology14080929
What was done
Narrative review synthesizing literature on prenatal and postnatal skeletal muscle development in ruminants, specifically sheep and cattle. The authors review evidence regarding the effects of maternal gestational nutrition on fetal myogenesis, myogenic regulatory factors (such as MYF5, MYOD1, and MYOG), satellite cell biology (regulated via PAX7, CARM1, and miR-31), endocrine signaling (GH-IGF1 axis and thyroid hormones), and genetic variants such as myostatin mutations.
What was found
The abstract presents qualitative mechanistic conclusions without quantitative data or effect estimates. It reports that both maternal nutrient restriction and overnutrition alter offspring muscle fiber number, cross-sectional area, and myogenic gene transcription. Postnatal hypertrophy is governed by satellite cell dynamics and hormonal axes, while genetic variations like myostatin mutations enhance muscle yield but may reduce reproductive performance.
Why it matters
This review integrates molecular genetics, developmental programming, and nutritional management in ruminants to guide precision livestock breeding and feeding strategies for meat production.
Limits
As a narrative review, it lacks a systematic literature search methodology, quality appraisal, and meta-analytic synthesis. The abstract reports no empirical sample sizes or quantitative effect measures. Findings are specific to ruminant livestock (sheep and cattle) and cannot be directly translated to human clinical contexts.
Cited by
- supports Animal studies show maternal protein restriction during pregnancy triggers epigenetic changes that program offspring to have smaller muscle mass throughout life.