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前沿速递 | ncs 集萃:2026-09-03 期

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老龄化人群队列中基因表达与代谢组学的纵向动态变化

Longitudinal dynamics of gene expression and metabolomics in an aging population cohort

El-Sayed Moustafa JS, Ramisch A, Raza YN, ... , Richardson S, Spector TD, Small KS.; science; (393, 6815)

Multiomic profiling provides a comprehensive physiological overview at the molecular level, but understanding of its spatiotemporal dynamics remains limited in human populations. We profiled longitudinal whole-blood gene expression and metabolite levels in 335 females over 8 years. Levels of 5061 genes and 181 metabolites changed over time, with individual trajectories often diverging from population-level trends. Longitudinally variable genes showed cell type specificity and enrichment for agin
多组学分析可在分子水平上提供全面的生理概览,但人群中对这些分子的时空动态理解仍然有限。我们对335名女性进行了为期8年的纵向全血基因表达和代谢物水平检测,发现5061个基因和181种代谢物的水平随时间发生变化,且个体轨迹常偏离群体平均趋势。随时间变化的基因具有细胞类型特异性,并富集于衰老相关通路(包括心代谢和神经退行性疾病)。纵向轨迹还受到遗传、昼夜节律、季节性及环境污染物暴露的影响。整合分析揭示了广泛存在的静态和时变跨组学关联。纵向分析有助于在分子层面理解年龄相关状况的时间演变,而掌握这些纵向模式中的个体差异对未来精准医学至关重要。
长达8年的女性纵向多组学数据显示,基因和代谢物随时间动态变化且个体差异显著,受遗传和环境因素共同影响,为精准医学下的衰老研究提供重要参考。
 

生命早期艰难梭菌定植重塑发育中的肠道

Early-life colonization with Clostridioides difficile remodels the developing gut

Semon A, Manzer HS, Keenan O, ... , Conrad MA, Hamilton KE, Zackular JP.; science; (393, 6815)

Clostridioides difficile causes severe disease in adults but commonly colonizes infants asymptomatically. The consequences of early-life colonization on host development remain unknown. In a neonatal mouse model, C. difficile colonization drove proinflammatory and tissue repair responses in the intestinal epithelium, enriching injury-associated intestinal stem cell populations and skewing differentiation toward secretory lineages. Despite transient colonization, exposure to C. difficile early in
艰难梭菌在成人中可引发严重疾病,但常无症状地定植于婴儿体内,而早期定植对宿主发育的影响尚不明确。在小鼠模型中,艰难梭菌定植驱动肠道上皮的促炎和组织修复反应,富集损伤相关肠干细胞群体并促使分化向分泌细胞谱系倾斜;尽管定植为暂时性,但生命早期暴露会导致成年后持续改变;上皮反应依赖毒素,非产毒株定植或母体接种靶向艰难梭菌的mRNA-脂质纳米颗粒疫苗可保护新生小鼠;人类婴儿肠道上皮细胞对艰难梭菌毒素敏感,且定植婴儿活检显示肠干细胞行为异常。该研究重新定义了艰难梭菌为一种被低估的、对宿主发育具有长期影响的早期病原体。
艰难梭菌早期定植通过毒素诱导肠道上皮促炎和修复反应,导致干细胞分化偏移及成年期持续影响,非产毒株或母体免疫可阻断其危害。
 

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