Dataset Information

PROTEOMIC SIGNATURES OF MONOCYTES IN HEREDITARY RECURRENT FEVERS

ABSTRACT: Hereditary recurrent fevers (HRF) are a group of monogenic autoinflammatory diseases characterized by auto-resolving attacks of sterile inflammation caused by mutations of MEFV, TNFRSF1A and MVK genes1-3. Familial Mediterranean fever (FMF) is the prototype of a HPR and is caused by gain-of-function mutations of the MEFV gene, coding for pyrin4 5. Pyrin is part of the Pyrin-Inflammasome that controls the activation and secretion of interleukin (IL)-1β and can be activated by the cortical actin cytoskeleton remodeling induced by bacterial toxins via RhoA. Mevalonate kinase deficiency (MKD) is secondary to bi-allelic mutations of the gene coding for mevalonate kinase (MVK), an enzyme involved in the cholesterol biosynthesis. Loss-of-function MVK mutations lead to a defective sterol synthesis and to a reduced prenylation of small G proteins, such as RhoA, favoring the activation of the Pyrin-inflammasome6-8. TNF receptor-associated periodic syndrome (TRAPS) is secondary to autosomal dominant mutations of the gene coding for the type I receptor for TNF (TNFRSF1A), resulting in a heap of misfolded TNF receptor 1 in the endoplasmic reticulum, leading to oxidative stress, defective autophagy and consequent over-secretion of pro-inflammatory cytokines9 10. The clinical manifestations of HRFs are rather unspecific and consist mainly in fever, serositis, skin rash, limb and articular pain. No specific biomarkers able to distinguish one among the different HRFs have been identified, so far11. Moreover, the majority of the studies investigating the pathogenic consequences of the genes’ mutations associated with the three HRFs were focused on the few mechanisms classically associated to the pro-inflammatory activation of cells of the innate immunity (NF-kB and MAPK activation, IL-1b activation and secretion). Conversely, an unbiased analysis of possible additional intracellular pathways involved in the different conditions has not been exploited. Recently, large-scale proteomics based on high-resolution mass spectrometry (MS) has offered a systems-wide hypothesis-free method to analyze intracellular pathways in order to identify new disease biomarkers12-14. Here, we analyzed the proteomic signature of unstimulated and stimulated monocytes of patients with FMF, TRAPS and MKD, describing the dysregulated intracellular pathways associated with each condition for the identification of possible biomarkers and possible novel therapeutic targets.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Monocyte, Leukocyte, Blood

DISEASE(S): Autoimmune Disease Of Blood

SUBMITTER: Andrea Petretto

LAB HEAD: Andrea Petretto

PROVIDER: PXD024068 | Pride | 2022-08-12

REPOSITORIES: Pride

ACCESS DATA

Publications

Proteomic Signatures of Monocytes in Hereditary Recurrent Fevers.

Penco Federica F Petretto Andrea A Lavarello Chiara C Papa Riccardo R Bertoni Arinna A Omenetti Alessia A Gueli Ilaria I Finetti Martina M Caorsi Roberta R Volpi Stefano S Gattorno Marco M

Frontiers in immunology 20220623

Hereditary periodic recurrent fevers (HRF) are monogenic autoinflammatory associated to mutations of some genes, such as diseases caused by mutations of including MEFV, TNFRSF1A and MVK genes. Despite the identification of the causative genes, the intracellular implications related to each gene variant are still largely unknown. A large -scale proteomic analysis on monocytes of these patients is aimed to identify with an unbiased approach the mean proteins and molecular interaction networks invo ...[more]

PMID: 35812440

Similar Datasets

Project description:Rationale: Endothelial cells (ECs) line the inner surface of continuous capillaries and form a permselective barrier between blood and tissues to limit paracellular fluid and solute flux. The capillary barrier is maintained by intercellular tight junctions (TJs) which are regulated, in part, by differential activity of small GTPases. Tumor necrosis factor (TNF) causes TJ disassembly in a process dependent upon NF-κB-mediated gene expression. Activated (GTP-bound) RhoB has been identified as a downstream effector of TNF-induced leak both through Rho-associated coiled-coil kinase-mediated phosphorylation of RelA, enhancing TNF-induced NF-κB-mediated gene activation, and through sequestration of Rac1 away from the cell junction, preventing barrier restoration. To date, no TNF-induced, RhoB-selective GTP exchange factor (GEF) has been identified in ECs. Objective: Identify a TNF-induced RhoB specific GEF in capillary ECs. Method and Results: human dermal microvascular ECs (HDMECs) were used because they form TJs. Candidate GEFs were identified by whole transcriptome profiling of HDMECs with or without TNF stimulation. Fifty-seven of 73 known GEFs were expressed in HDMECs and 17 were significantly upregulated by TNF. Functional impact of each of the latter group was assessed by measuring the effects of depletion by short interfering RNA knockdown on TNF-induced reduction of trans-endothelial electrical resistance (TEER) of HDMEC monolayers. Depletions of ArhGEF10 or RhoB or double depletion of ArhGEF10/RhoB similarly decreased TNF-mediated reduction of TEER. ArhGEF10 knockdown prevented TNF-induced disruption of TJ proteins assessed by confocal microscopy. TNF-induced increases in the levels of activated RhoB in HDMEC lysates were markedly reduced with only minimal alterations in RhoA or RhoC activation. Finally, immunoisolated ArhGEF10 selectively catalyzed GTP exchange for GDP in RhoB, but not RhoA or RhoC, in vitro. Conclusion: ArhGEF10 is a TNF-induced RhoB-selective GEF for RhoB in cultured human capillary ECs that contributes to TJ disruption.

Dataset Information

PROTEOMIC SIGNATURES OF MONOCYTES IN HEREDITARY RECURRENT FEVERS

Publications

Proteomic Signatures of Monocytes in Hereditary Recurrent Fevers.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure