| Chapter title |
Single-Step Capture and Targeted Metabolomics of Alkyl-Quinolones in Outer Membrane Vesicles of Pseudomonas aeruginosa
|
|---|---|
| Chapter number | 15 |
| Book title |
Lipidomics
|
| Published in |
Methods in molecular biology, June 2017
|
| DOI | 10.1007/978-1-4939-6996-8_15 |
| Pubmed ID | |
| Book ISBNs |
978-1-4939-6995-1, 978-1-4939-6996-8
|
| Authors |
Lahiri, Pallavi, Ghosh, Dipankar, Pallavi Lahiri, Dipankar Ghosh |
| Editors |
Sanjoy K. Bhattacharya |
| Abstract |
Outer membrane vesicles (OMVs) are secreted by all Gram-ve pathogens. These nano-scale delivery vehicles contain discrete arrays of prokaryotic pathogenic determinants, including a family of low molecular weight (MW) lipidic quorum signaling alkyl-quinolones (AQs). These are synthesized from β-keto-fatty acids and function like primordial lipidic hormones, which regulate numerous pathogenic factors both inter-species and intra-species. Significantly, AQs can also directly exacerbate pathogenesis by cross-kingdom signaling with the host immune, metabolic, and other systems. In Pseudomonas aeruginosa more than 50 AQs are reported; many with pathogenic mechanisms that are largely unknown. Some of these AQs are exclusively associated with OMVs. Accurate characterization of these OMV-AQs may reveal novel mechanism of diseases and Pseudomonas aeruginosa presents an ideal model. Matrix-free laser desorption/ionization mass spectrometry (LDI-MS) technologies enjoy unique advantages in mass spectrometry (MS)-based imaging and low MW analysis. We report single-step isolation of Pseudomonas aeruginosa OMV on inert ceramic filters and high-resolution mass spectrometry (HRMS) analysis of AQs vesicle in situ. |
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