The anti-inflammatory agent 5-ASA reduces the level of specific tsRNAs in sperm cells of high-fat fed C57BL/6J mouse sires and improves glucose tolerance in female offspring.
Level 5 - mechanism / opinion, no new human data
Preclinical animal model study (bench/animal research)
PubMed 37499293 · doi:10.1016/j.jdiacomp.2023.108563
What was done
Male C57BL/6JBomTac mice were fed either a high-fat diet alone or a high-fat diet combined with the anti-inflammatory drug 5-aminosalicylic acid (5-ASA) for ten weeks prior to mating. The authors isolated sperm from the sires to assess specific transfer RNA-derived small RNA (tsRNA) levels and evaluated metabolic phenotypes, including glucose tolerance, in the resulting offspring.
What was found
The abstract reports no numerical values, effect sizes, or confidence intervals. It qualitatively reports that 5-ASA treatment decreased Glu-CTC tsRNA levels in sperm cells and improved glucose tolerance in female offspring fed a standard chow diet. Paternal high-fat diet-induced obesity alone showed only a moderate effect on the metabolic phenotype of both male and female offspring in this setup.
Why it matters
This study provides mechanistic, preclinical evidence that reducing systemic inflammation in obese fathers can alter sperm epigenetic marks (specifically tsRNAs) and improve metabolic outcomes in the next generation.
Limits
The study was conducted entirely in an animal model (C57BL/6J mice) and cannot be directly extrapolated to humans. The abstract omits sample sizes, exact numbers, and statistical significance values. Metabolic improvements were noted only in female offspring on a chow diet, and paternal high-fat diet per se had only a modest baseline effect on offspring.
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