PXD020204 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | A phosphoproteomic analysis of platelets in severe obesity uncovers platelet reactivity and signaling pathways alterations |
Description | Objective: Obesity is associated with a pro-inflammatory and pro-thrombotic state that supports atherosclerosis progression. The goal of this study was to gain insights into the phosphorylation events related to platelet reactivity in obesity and identify platelet biomarkers and altered activation pathways in this clinical condition. Approach and Results: We performed a comparative phosphoproteomic analysis of resting platelets from obese patients and their age- and gender-matched lean controls. The phosphoproteomic data were validated by mechanistic, functional and biochemical assays. We identified 220 differentially regulated phosphopeptides, from at least 175 proteins; interestingly all were up-regulated in obesity. Most of the altered phosphoproteins are involved in Src-family kinases (SFKs)-related signaling pathways, cytoskeleton reorganization and vesicle transport, some of them validated by targeted mass spectrometry. To confirm platelet dysfunction, flow cytometry assays were performed in whole blood indicating higher surface levels of glycoprotein (GP) VI and C-type lectin-like (CLEC) -2 in platelets from obese patients correlating positively with BMI. ROC curves analysis suggested a much higher sensitivity for GPVI to discriminate between obese and lean individuals. Indeed, we also found that obese platelets displayed more adhesion to collagen-coated plates. In line with the above data, sGPVI levels - indicative of higher GPVI signaling activation - were almost double in plasma from obese patients. Conclusion: Our results provide novel information on platelet phosphorylation changes related to obesity, revealing the impact of this chronic pathology on platelet reactivity and pointing towards the main signaling pathways dysregulated. |
HostingRepository | PRIDE |
AnnounceDate | 2024-10-22 |
AnnouncementXML | Submission_2024-10-22_05:33:41.188.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Montserrat Carrascal |
SpeciesList | scientific name: Homo sapiens (Human); NCBI TaxID: 9606; |
ModificationList | phosphorylated residue |
Instrument | LTQ Orbitrap |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2020-07-05 23:38:57 | ID requested | |
1 | 2022-02-23 09:13:21 | announced | |
⏵ 2 | 2024-10-22 05:33:41 | announced | 2024-10-22: Updated project metadata. |
Publication List
Dataset with its publication pending |
Keyword List
submitter keyword: obesity, biomarkers,platelets, quantitative phosphoproteomics |
Contact List
Angel García Alonso |
contact affiliation | 1Platelet Proteomics Group, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), Universidade Santiago de Compostela; and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain. |
contact email | angel.garcia@usc.e |
lab head | |
Montserrat Carrascal |
contact affiliation | IIBB-CSIC |
contact email | montserrat.carrascal.csic@uab.cat |
dataset submitter | |
Full Dataset Link List
Dataset FTP location
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PRIDE project URI |
Repository Record List
[ + ]
[ - ]
- PRIDE
- PXD020204
- Label: PRIDE project
- Name: A phosphoproteomic analysis of platelets in severe obesity uncovers platelet reactivity and signaling pathways alterations