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Senescence-Driven Remodeling Defines an Aggressive and Immunomodulatory Subtype of Endometriosis

2 weeks 6 days ago
Endometriosis is a benign yet invasive disease characterized by ectopic endometrial growth and immune remodeling. While emerging evidence implicates cellular senescence in disease progression, the underlying mechanisms remain largely undefined. In this study, we identified marked heterogeneity in senescence across ectopic lesions and observed that P21-activated kinase 4 (PAK4) was consistently upregulated in senescent cells. Mechanistically, senescence induced PAK4 expression, which in turn...
Jingchun Liu

Myeloid cell nuclear differentiation antigen (MNDA) is an interferon-inducible regulator of myelopoiesis. Potential role in the myeloid-biased aging process

3 weeks ago
Aging is a myeloid-biased process, i.e., the differentiation of myeloid cells increases, while the lymphoid lineage declines. Cellular senescence increases the secretion of inflammatory mediators which skew hematopoiesis toward myeloid cell generation. Myeloid cell nuclear differentiation antigen (MNDA) is a type-1 interferon (IFN)-inducible factor which is mainly expressed in the cells of the granulocyte-monocyte lineage, especially it is enriched in M2 macrophages and myeloid-derived...
Antero Salminen

Testicular aging revisited: Current understanding of mechanisms and emerging interventions

3 weeks ago
Male reproductive aging is a complex physiological process characterized by progressive deterioration in spermatogenesis, hormonal imbalance, and increased susceptibility to infertility and genetic disorders. This review comprehensively summarizes the pivotal molecular mechanisms underlying testicular aging, with emphasis on mitochondrial dysfunction, oxidative stress, DNA damage, autophagy impairment, chronic inflammation, cellular senescence, and dysregulated apoptosis. Accumulating evidence...
Feng Jiang

Gut Luminal Exosomes in Young and Old Mice: Multi-Omic Characteristics and Regulation of Gut Permeability

3 weeks ago
Aging is a multifaceted process impacting physiological, genomic, metabolic, and immune functions. This study investigates the role of luminal fecal exosomes (LFEs) in age-associated metabolic dysfunction. We analyzed LFEs from young (3-month) and old (24-month) male and female C57BL/6 mice to characterize age-related differences in exosomal proteomic and miRNA cargos. To explore interactions between LFEs and the gut microbiome, naïve young mice were gavage fed with LFEs from old donors,...
Abdelnaby Khalyfa

Chromatin accessibility regulates age-dependent nuclear mechanotransduction

3 weeks ago
The integration of environmental cues into cellular programs is crucial for cell function. Yet, how this integration is modulated due to cellular aging remains unclear. We propose that the 3D chromatin organization filters these signals and investigated how age-related chromatin changes in human dermal fibroblasts affect responses to mechanical tension and TGF-β. Young fibroblasts exhibited synergistic gene expression enhancement in response to combined stimuli, a response that was markedly...
Yawen Liao

Spatial and single-cell transcriptomics reveals senescence-associated changes in MIA-induced ASD male mouse brain

3 weeks ago
Autism spectrum disorder (ASD) is a neurodevelopmental disorder, and maternal immune activation (MIA) is highly implicated in neuropathology and ASD-like phenotypes in offspring. However, the underlying regulatory mechanisms of ASD are multifactorial and remain largely unknown in MIA offspring. Here, we performed spatial transcriptome and single-nucleus RNA sequencing (snRNA-seq) analysis in MIA offspring brain to explore the neurobiological features of ASD. We obtained MIA-induced genes and...
Wei Zhang