Longevity Papers 2025-11-02

In this episode of Longevity Papers podcast, we discuss three cutting-edge papers on aging mechanisms and potential interventions, featured this week on longevitypapers.com. 1) Decay in transcriptional information flow is a hallmark of cellular aging (Emison et al., Yale University, October 30, 2025, biorxiv, https://www.biorxiv.org/content/10.1101/2025.10.30.685689v1 ) - We explore a novel information-theoretic framework showing that aging is fundamentally a loss of coordinated transcription factor activity across networks. The authors use single-cell RNA-seq across ten tissues to show mutual information between transcription factors and target genes declines with age, but crucially, in silico upregulation of key transcription factors restores youthful gene expression patterns. This offers a systems-level understanding of aging and suggests targeted transcription factor reinforcement as a rejuvenation strategy. 2) FOXM1 enhances DNA repair in aged cells to maintain the peripheral heterochromatin barrier to senescence enhancers (Sousa-Soares et al., Universidade do Porto, October 30, 2025, biorxiv, https://www.biorxiv.org/content/10.1101/2025.10.29.685369v1 ) - We examine a powerful age-reversal mechanism where FOXM1 induction restores epigenetic integrity in aged cells. The pathway is elegant: FOXM1 drives DNA repair genes, preserves the G9a methyltransferase, maintains H3K9me2 heterochromatin at the nuclear periphery, and thereby silences senescence-enhancer landscapes. This work identifies FOXM1 as a potential age-reversal factor rather than merely slowing decline. 3) Lactobacillus Salivarius-Derived Indole-3-Acetic Acid Promotes AHR-PARP1 Axis-Mediated DNA Repair to Mitigate Intestinal Aging (Cao et al., Chinese Academy of Sciences, October 28, 2025, Advanced Science, https://pubmed.ncbi.nlm.nih.gov/41147383/ ) - We discuss a concrete, translatable microbiota-to-DNA repair axis where bacterial indole-3-acetic acid activates the aryl hydrocarbon receptor, which potentiates PARP1 activity to enhance DNA repair in intestinal epithelial cells. This identifies Lactobacillus salivarius as a candidate probiotic intervention and offers a direct path to clinical trials. Together, these papers represent some of the strongest mechanistic work on aging this week, combining systems biology, epigenetics, and microbiome approaches. This podcast is AI generated and may contain errors.