Project description:Raw files corresponding to LC-MS-based relative quantification of oxidized lipids in Pfa1 cells and mouse liver samples subjected to ferroptosis. Data were acquired in parallel reaction monitoring (PRM) MS/MS mode.
Project description:Raw files corresponding to the epilipidomic dataset for identification and relative quantification of oxidized complex lipids in the blood plasma of lean and obese individuals.
Project description:Lipids are important structural and functional components of the skin. Alterations in the lipid composition of the epidermis can lead to diminished barrier function of the skin and are associated with diseases like atopic dermatitis. SHARPIN-deficient cpdm mice develop a chronic dermatitis with similarities to atopic dermatitis in humans. Here, we used a new mass spectrometry analytical strategy named multiple reaction monitoring (MRM) profiling to rapidly identify discriminative lipid ions. Shorter fatty acyl residues and increased relative amounts of sphingosine ceramides were observed in cpdm epidermis compared to wild type mice. These changes were accompanied by downregulation of the Fasn gene which encodes fatty acid synthase. Fast screening of more than 300 ion pairs (representing a parent molecule and a fragment) related to diverse lipids allowed phenotypical profiling and discrimination of cpdm and wild type mice. Tentative attribution of the most significant ion pairs was confirmed by product ion screening (MS/MS). Relative quantification of sphingosine ceramides CerAS(d18:1/24:0)OH, CerAS(d18:1/16:0)OH and CerNS(d18:1/16:0) could discriminate between the two groups with 100% accuracy, while the free fatty acids cerotic acid, 16-hydroxy palmitic acid, and docosahexaenoic acid (DHA) had a 96.4% of accuracy. MRM profiling is proposed as an accelerated prospective biomarker discovery approach.
Project description:Raw files corresponding to the epilipidomic dataset for identification and relative quantification of oxidized complex lipids in the blood plasma of lean and obese individuals.
Project description:In this study, we aimed to refine our understanding of the molecular events associated with the proteomic response to hypoxia in OS cells with different anatomic origins, namely from a primary and metastatic site. There are similarities in biology and treatment of OS in human and canine. We opted to use a canine parental osteosarcoma cell line (POS), which was cultured from a primary canine tumor24; and a highly metastatic POS cell line (HMPOS) that was derived from pulmonary metastatic lesions in mouse POS xenografts. We have chosen a protein-centric study design that combines 1) initially a label-free data dependent acquisition (DDA) method for enabling quantification of larger sets of proteins and global assessment of adaptive responses induced by hypoxia, 2) selection of hypoxia-responsive protein targets and 3) using parallel reaction monitoring (PRM) for quantitative monitoring of signature peptides of hypoxia-responsive protein targets to determine their precise response to hypoxia and to confirm hypoxia-regulated pathways. Functional biochemical assays provide additional validation of the proteomic findings. Taken together, our results describe the hypoxia response of OS cell phenotypes by inducing comprehensive alterations in the proteome biology that are associated with metabolic reprogramming, redox modulation and extra cellular matrix (EMC) remodeling.
Project description:Development, implementation, and evaluation of a new data acquisition scheme called internal standard triggered-parallel reaction monitoring (IS-PRM) to increase the scale of targeted quantitative experiments while retaining high detection and quantification performance. All the details about the dataset, the associated sample preparation and liquid chromatography coupled to tandem mass spectrometry methods, and the data processing procedures are provided in the manuscript by Gallien et al., entitled "Large-Scale Targeted Proteomics Using Internal Standard Triggered-Parallel Reaction Monitoring", Molecular and Cellular Proteomics.
Project description:RIP-chip-SRM : a New Combinatorial Large Scale Approach Identifies a Set of Translationally Regulated bantam/miR 58 Targets in C. elegans RNA binding protein immunopurification + microarray + targeted protein quantification via Selected Reaction Monitoring This SuperSeries is composed of the SubSeries listed below.