ArticleResearch square2024
Maternal ancestry reveals cyclical aging of the mammary gland.
Article in Research square, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
We present provocative data that in addition to the expected progressive age-related involution, mammary gland aging can occur in a cyclical pattern and is dictated by maternal ancestry. In cyclical aging, mammary glands of 11 and 19 months old mice share genetic and proteomic signatures, which are enriched in breast cancer-related pathways, but are absent at 3 and 14 months. Since incidence of breast cancer shows a bimodal age distribution at 45 (~11m in mice) and 65 (~ 19m in mice), cyclical aging may contribute to these peaks of cancer susceptibility. Conversely, since the mammary glands at 3 and 14 months cluster together hierarchically, the cancer-associated peaks seem separated by a rejuvenation phase. Since cyclical aging is observed in mice with extended lifespan, these findings raise the possibility that if oncogenic mutations are avoided during the pro-oncogenic phases, through its rejuvenation phase, cyclical aging may impact multiple organs leading to extended longevity.
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