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Proteome Analysis of Human Neutrophil Granulocytes From Patients With Monogenic Disease Using Data-Independent Acquisition Publisher Pubmed



Grabowski P1 ; Hesse S2 ; Hollizeck S2 ; Rohlfs M2 ; Behrends U4 ; Sherkat R5 ; Tamary H6 ; Unal E7 ; Somech R8 ; Patiroglu T7 ; Canzar S9 ; Van Der Werff Ten Bosch J10 ; Klein C2 ; Rappsilber J1, 3
Authors

Source: Molecular and Cellular Proteomics Published:2019


Abstract

Neutrophil granulocytes are critical mediators of innate immunity and tissue regeneration. Rare diseases of neutrophil granulocytes may affect their differentiation and/or functions. However, there are very few validated diagnostic tests assessing the functions of neutrophil granulocytes in these diseases. Here, we set out to probe omics analysis as a novel diagnostic platform for patients with defective differentiation and function of neutrophil granulocytes. We analyzed highly purified neutrophil granulocytes from 68 healthy individuals and 16 patients with rare monogenic diseases. Cells were isolated from fresh venous blood (purity >99%) and used to create a spectral library covering almost 8000 proteins using strong cation exchange fractionation. Patient neutrophil samples were then analyzed by data-independent acquisition proteomics, quantifying 4154 proteins in each sample. Neutrophils with mutations in the neutrophil elastase gene ELANE showed large proteome changes that suggest these mutations may affect maturation of neutrophil granulocytes and initiate misfolded protein response and cellular stress mechanisms. In contrast, only few proteins changed in patients with leukocyte adhesion deficiency (LAD) and chronic granulomatous disease (CGD). Strikingly, neutrophil transcriptome analysis showed no correlation with its proteome. In case of two patients with undetermined genetic causes, proteome analysis guided the targeted genetic diagnostics and uncovered the underlying genomic mutations. Data-independent acquisition proteomics may help to define novel pathomechanisms in neutrophil diseases and provide a clinically useful diagnostic dimension. © 2019 American Society for Biochemistry and Molecular Biology Inc. All Rights Reserved.
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