Summary of Study ST003605
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR002231. The data can be accessed directly via it's Project DOI: 10.21228/M87R79 This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.
| Study ID | ST003605 |
| Study Title | Global metabolomics and tracing of E coli-derived metabolites following engulfment of heat-killed bacteria by wild type or RagAGTP-deficient bone marrow derived macrophages. |
| Study Summary | Global metabolomics and 13C-tracing analysis of wild type or RagA-deficient bone marrow derived macrophages exposed to heat-killed uniformly 13C-labelled E. coli in a trans-well system for 6h or 18h. |
| Institute | University of Colorado Anschutz Medical Campus |
| Last Name | Haines |
| First Name | Julie |
| Address | 12801 E 17th Ave, Room 1303, Aurora, Colorado, 80045, USA |
| julie.haines@cuanschutz.edu | |
| Phone | 3037243339 |
| Submit Date | 2024-11-25 |
| Raw Data Available | Yes |
| Raw Data File Type(s) | raw(Thermo) |
| Analysis Type Detail | LC-MS |
| Release Date | 2024-12-27 |
| Release Version | 1 |
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Project:
| Project ID: | PR002231 |
| Project DOI: | doi: 10.21228/M87R79 |
| Project Title: | Macrophages recycle phagocytosed bacteria to fuel immunometabolic responses |
| Project Summary: | Macrophages specialize in phagocytosis, a cellular process that eliminates extracellular matter, including microbes, through internalization and degradation. Despite the critical role of phagocytosis during bacterial infection, the fate of phagocytosed microbial cargo and its impact on host cell is poorly understood. Here, we reveal that ingested bacteria constitute an alternative nutrient source that skews immunometabolic host responses. Tracing stable isotope-labelled bacteria, we found that phagolysosomal degradation of bacteria provides carbon atoms and amino acids that are recycled into various metabolic pathways, including glutathione and itaconate biosynthesis, and satisfy macrophage bioenergetic needs. Metabolic recycling of microbially-derived nutrients is regulated by the nutrient sensing mTORC1 and intricately tied to microbial viability. Dead bacteria, as opposed to live ones, are enriched in cyclic- adenosine monophosphate (AMP), sustain the cellular AMP pool and subsequently activate AMP protein kinase (AMPK) to inhibit mTORC1. Consequently, killed bacteria strongly fuel metabolic recycling and support macrophage survival, but elicit decreased reactive oxygen species (ROS) production and a reduced IL-1β secretion compared to viable bacteria. These results reveal a novel insight into the fate of engulfed microbes and highlights a microbial viability-associated metabolite that triggers host metabolic and immune responses. Our findings hold promise for shaping immunometabolic intervention in various immune-related pathologies. |
| Institute: | University of Colorado Anschutz Medical Campus |
| Laboratory: | Lab of Angelo D'Alessandro in collaboration with lab of Johan Garaude (INSERM, Fr) |
| Last Name: | Haines |
| First Name: | Julie |
| Address: | 12801 E 17th Ave, Room 1303, Aurora, Colorado, 80045, USA |
| Email: | julie.haines@cuanschutz.edu |
| Phone: | 3037243339 |
