In vitro exposure to sucralose ablates CD8 T cell responses
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ABSTRACT:
PROVIDER: PRJNA1084069 | ENA |
REPOSITORIES: ENA
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Project description:In vitro exposure to sucralose ablates CD8 T cell responses [scRNA-seq]
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Project description:The composition of the gut microbiota is directly associated with response to checkpoint inhibitors in cancer. How diet impacts the gut microbiota and downstream immune response to cancer remains unclear. Here, we show that consumption of a common artificial sweetener, sucralose, supports microbial dysbiosis, restricts T cell metabolism and function, and limits immunotherapy response in cancer. Microbial dysbiosis is associated with a reduction in Arginine, and amino acid supplementation or fecal microbiome transfer completely restores T cell function and immunotherapy response. Thus, artificial sweetener consumption destabilizes the gut microbiota, resulting in compromised T cell function and ablated immunotherapy response in cancer.
2025-07-14 | GSE260936 | GEO
Project description:Sucralose is an artificial sweetener commonly used in food and drinks to increase food palatability and control total calorie content. While it is approved for human consumption by both the EFSA and the FDA, recent reports have questioned the safety of long-term consumption of s. in this study, we show that high doses of sucralose affect immune responses in different mouse models of autoimmunity, infection, and cancer. Similarly, sucralose impedes proper t cell proliferation and polarization in vitro. Mechanistically, sucralose dampens signals downstream the TCR resulting in decrease calcium flux upon TCR activation.
2023-03-14 | GSE220862 | GEO
Project description:CD8 T cells play a central role in antiviral immunity. Type I interferons are among the earliest responders after virus exposure and can cause extensive reprogramming and antigen-independent bystander activation of CD8 T cells. Although bystander activation of pre-existing memory CD8 T cells is known to play an important role in host defense and immunopathology, its impact on naïve CD8 T cells remains underappreciated. Here we report that exposure to reovirus, both in vitro or in vivo, promotes bystander activation of naïve CD8 T cells within 24 hours and that this distinct subtype of CD8 T cell displays an innate, antiviral, type I interferon sensitized signature. The induction of bystander naïve CD8 T cells is STAT1 dependent and regulated through nicotinamide phosphoribosyl transferase (NAMPT)-mediated enzymatic actions within NAD+ salvage metabolic biosynthesis. These findings identify a novel aspect of CD8 T cell activation following virus infection with implications for human health and physiology.
2023-01-30 | PXD039614 | Pride
Project description:Non-nutritive sweeteners like sucralose are consumed by billions of people. While animal and human studies have demonstrated a link between synthetic sweetener consumption and metabolic dysregulation, the mechanisms responsible remain unknown. Here we use a diet supplemented with sucralose to investigate the long-term effects of sweet/energy imbalance. In flies, chronic sweet/energy imbalance promoted hyperactivity, insomnia, glucose intolerance, enhanced sweet taste perception and a sustained increase in food and calories consumed, effects that are reversed upon sucralose removal. Mechanistically, this response was mapped to the ancient insulin, catecholamine, and NPF/NPY systems and the energy sensor AMPK, which together comprise a novel neuronal starvation response pathway. Interestingly, chronic sweet/energy imbalance promoted increased food intake in mammals as well, and this also occurs through an NPY-dependent mechanism. Together our data show that chronic consumption of a sweet/energy imbalanced diet triggers a conserved neuronal fasting response and increases the motivation to eat.
2016-07-10 | GSE73179 | GEO
Project description:sucralose administration in mice Raw sequence reads
| PRJNA787401 | ENA
Project description:Transcriptional profiling of mouse in-vitro derived CD8+ cells (obtained after culturing BM-HSCs isolated from B6 mice) with OP9-DL1 cells for 35 days were compared to CD8+ thymocytes isolated from 4-5 weeks old B6 mice. Our goal was to determine similarities and differences in gene expression profile between in vitro-derived CD8+ cells and CD8+ cells isolated from the thymus. The procedure of in vitro differentiation of HSC using OP9-DL1 cocultures was previously described by: Schmitt, T. M., and J. C. Zuniga-Pflucker. 2002. Induction of T cell development from hematopoietic progenitor cells by delta-like-1 in vitro. Immunity 17:749-756 and Holmes, R., and J. C. Zuniga-Pflucker. 2009. The OP9-DL1 system: generation of T-lymphocytes from embryonic or hematopoietic stem cells in vitro. Cold Spring Harb Protoc 2009:pdb prot5156. Biological replicates: 2 different samples of in vitro-derived CD8+ T cells from day 35 were compared to 2 different samples of thymic CD8+ cells.
2012-09-05 | E-GEOD-37669 | biostudies-arrayexpress
Project description:In vitro generation of CD8 Trm cells
| PRJNA974072 | ENA
Project description:Purified primary human CD8 T cells were stimulated in vitro in parallel using a magnetic bead conjugated to either anti-CD3/28 or anti-CD2/3/28 antibodies. Cells were cultured for 6 days in complete RPMI1640 and 10ng/ml IL2 and were harvested on day 6 and RNA was isolated for further labelling and hybridisation.
2015-08-12 | E-MTAB-3470 | biostudies-arrayexpress
Project description:In Vitro Modeling of CD8 T Cell Exhaustion
| PRJNA868689 | ENA