Proteomic Evaluation of the Influence of Shear Stress and BRD4-Inhibition on Human Umbilical Vein Endothelial Cells

ABSTRACT: Atherosclerosis is an important pathological factor in the development of cardiovascular diseases. In addition to increased plasma lipid concentrations, irregular/oscillatory shear stress and inflammatory processes trigger pathophysiological changes. Inhibitors of the transcription modulatory bromo- and extra-terminal domain (BET) protein family (BETi) could offer a possible therapeutic approach due to their anti-inflammatory properties. In this study, the influence of laminar shear stress, inflammation and BETi on human endothelial cells in an atherosclerosis in vitro model was investigated using global protein expression profiling. For this purpose, human umbilical cord derived vascular endothelial cells (HUVEC) were treated with TNFα to mimic the inflammatory condition and were exposed to 24h laminar shear stress in the presence or absence of a BRD4 inhibitor, JQ1. Data-independent acquisition mass spectrometry (DIA-MS) alloqed us to quantify 3316 proteins for further statistical analysis. Differentially regulated proteins indicate a clear influence of inflammation and shear stress on human endothelial cells. Overall, application of JQ1 is led to significant changes in the proteome, including a strong anti-inflammatory response as well as a potentially negative impact on atherosclerosis formation. To our knowledge, this is the first proteomics study on HUVEC which investigates the influence of shear stress and BET inhibition in TNFα inflammatory endothelial cell culture model.

INSTRUMENT(S): timsTOF Pro 2

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Epithelial Cell

SUBMITTER: Christof Lenz  

LAB HEAD: Christof Lenz

PROVIDER: PXD035842 | Pride | 2022-10-30

REPOSITORIES: Pride