This study reported that pasteurized Akkermansia muciniphila (pAKK) promotes the differentiation of intestinal microfold cells (M cells) and increases the expression of the GP2 receptor via the TLR2-MyD88-NF-κB pathway, thereby enhancing the ability of Salmonella Typhimurium (STm) to invade Peyer's patches and leading to aggravated infection in mice. However, pAKK had no significant effect on the extracellular pathogen Citrobacter rodentium (Cr). Experiments showed that pre-treatment with pAKK significantly increased the expression of M cell markers and the number of gut lymphoid tissues, with effects depending on TLR2 signal activation mediated by the Amuc_1100 protein, independent of the canonical RANKL pathway. This study cautions that the application of probiotics should take pathogen specificity into account, as pAKK may increase the risk of infection by pathogens that rely on M cell invasion.

Low back pain (LBP) is the leading cause of musculoskeletal disability worldwide, affecting approximately 70% of the global population (Global Burden of Disease Study 2021). Aging is an independent risk factor for LBP, with nearly 40% of individuals over 65 developing LBP and exhibiting heightened susceptibility to lumbar disc herniation. Through single-nucleus RNA sequencing of human lumbar disc specimens, this study systematically compares cellular heterogeneity between aging and herniated discs. We identified senescence-associated secretory phenotype (SASP) in aged disc cells and IL-17-mediated immune activation in herniation, revealing distinct therapeutic targets. These findings advance mechanistic understanding of disc degeneration and offer mechanistically-informed strategies, such as SASP inhibition and IL-17 pathway modulation, for precision treatment of age-related LBP in elderly populations. 

This study reveals that neutrophil extracellular traps (NETs) drive macrophage-derived chemokine production (CXCL9/10/11) to promote CD8+ T cell infiltration in obstruction-induced renal fibrosis. Using unilateral ureteral obstruction (UUO) models, researchers demonstrated that NET inhibition via PAD4 deletion or DNase treatment attenuated fibrosis, while NET transfer exacerbated it. Mechanistically, NET-macrophage interactions via TLR2/4 signaling license chemokine secretion, fueling CD8+ T cell recruitment and granzyme B-mediated tubular injury. These findings establish NETs as central orchestrators of immune-fibrotic crosstalk, providing therapeutic targets for chronic kidney diseases.

This study demonstrates that Setd2 overexpression rescues bivalent gene expression during zygotic genome activation (ZGA) in somatic cell nuclear transfer (SCNT) embryos, significantly improving cloning efficiency. By mapping H3K4me3 and H3K27me3 dynamics in mouse SCNT embryos, researchers identified aberrant hyperaccumulation of these histone marks at promoter regions during ZGA, leading to dysregulated bivalent gene expression. Overexpression of Setd2, the H3K36me3 methyltransferase, restored chromatin balance by antagonizing H3K27me3 deposition and enhancing transcriptional activation of ZGA-critical genes, thereby increasing blastocyst formation rates.

This review focuses on the critical role of amino acid metabolism in breast cancer development and progression. It explains how cancer cells reprogram amino acid usage—especially glutamine, serine, glycine, aspartate, arginine, and tryptophan—to support proliferation, survival, immune evasion, and metastasis. The review emphasizes metabolic heterogeneity among different breast cancer subtypes and explores therapeutic strategies targeting these pathways.

This review article provides a comprehensive overview of stress granules (SGs) —membraneless organelles formed in response to cellular stress—and their interactions with other organelles. It explores their structure, function, roles in health and disease, especially neurodegeneration, and discusses methodologies used to study these interactions. SGs influence critical cellular pathways, and understanding their interplay with both membrane-bound and membraneless organelles can reveal potential therapeutic targets for diseases like ALS and FTD.

Researchers from the National University of Singapore (NUS) have solved a 60-year-old mystery in bacterial cell envelope biology, defining the primary function of an important protein complex responsible for maintaining the stability of the outer membrane (OM).