The Dynamics of Somatic Mutagenesis During Life in Humans.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing genomic and lineage-tracing literature without systematic review methodology.
PubMed 35822044 · doi:10.3389/fragi.2021.802407
What was done
The authors reviewed recent advances in whole-genome sequencing and lineage-tracing studies evaluating somatic mutation accumulation in normal human tissues across the human lifespan, comparing prenatal development to adult aging.
What was found
The abstract reports no numerical figures or quantitative statistics. Qualitatively, the review notes that somatic mutation burden and mutational signatures vary across tissue types, somatic mutation rates remain constant within adult tissues over time, and the rate of mutation accumulation is substantially higher early in life prior to birth compared to adult life.
Why it matters
It highlights that clonal and pathogenic mutations, including cancer driver events, can originate during early embryonic and fetal life decades before clinical disease manifests.
Limits
As a narrative review, it lacks a systematic search protocol and quantitative pooled effect estimates. The abstract does not quantify specific mutation rates, tissue-specific variances, or patient sample sizes from the cited primary literature.
Cited by
- supports As humans age, all cells throughout the body accumulate somatic mutations.