Publications by authors named "Nicolas Delaleu"

Cancer is highly infiltrated by myeloid-derived suppressor cells (MDSCs). Currently available immunotherapies do not completely eradicate MDSCs. Through a genome-wide analysis of the translatome of prostate cancers driven by different genetic alterations, we demonstrate that prostate cancer rewires its secretome at the translational level to recruit MDSCs.

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  • - Fabry disease is a rare genetic disorder linked to the alpha-galactosidase gene, and while it can be managed with enzyme replacement therapy (ERT), understanding FN's molecular roots is essential for identifying biomarkers and drug targets.
  • - The study involved RNA sequencing of biopsies from two cohorts of Fabry nephropathy patients and control individuals, revealing significant differences in gene expression associated with the disease and its response to ERT over time.
  • - Despite some positive responses to early ERT—especially in gene expression patterns—many biological pathways, particularly in glomeruli and arteries, remained altered, leading to the identification of 69 potential drug repurposing candidates as adjunct treatments.
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Autoimmune polyendocrine syndrome type I (APS-1) is caused by mutations in the autoimmune regulator (AIRE) gene and characterised clinically by multiple autoimmune manifestations and serologically by autoantibodies against tissue proteins and cytokines. We here hypothesised that lack of AIRE expression in thymus affects blood immune cells and performed whole-blood microarray analysis (N = 16 APS-I patients vs 16 controls), qPCR verification, and bioinformatic deconvolution of cell subsets. We identified B cell responses as being downregulated in APS-1 patients, which was confirmed by qPCR; these results call for further studies on B cells in this disorder.

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Minimal change disease (MCD), a major cause of nephrotic syndrome, is usually treated by corticosteroid administration. MCD unresponsiveness to therapy and recurrences are nonetheless frequently observed, particularly in adults. To explore MCD-related pathogenetic mechanisms and to identify novel drug targets ultimately contributing to novel therapeutic avenues with a certain specificity for MCD, we compared glomerular transcriptomes from MCD with membranous nephropathy (MN) patients and healthy controls.

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  • * Researchers separated human memory T lymphocytes based on their inflammatory cytokine production to identify factors influencing pathogenic T cell behavior.
  • * They discovered that a specific gene signature and the activation of the NF-κB pathway, along with the repressor BHLHE40, regulate the proinflammatory characteristics of these T cells, potentially linking it to diseases.
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Tumor-associated macrophages (TAMs) represent a major component of the tumor microenvironment supporting tumorigenesis. TAMs re-education has been proposed as a strategy to promote tumor inhibition. However, whether this approach may work in prostate cancer is unknown.

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Renal cell cancer is among the most common forms of cancer in humans, with around 35,000 deaths attributed to kidney carcinoma in the European Union in 2012 alone. Clear cell renal cell carcinoma (ccRCC) represents the most common form of kidney cancer and the most lethal of all genitourinary cancers. Here, we apply omics technologies to archival core biopsies to investigate the biology underlying ccRCC.

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Background: Statins effectively reduce risk of cardiovascular-related morbidity and mortality in patients with hyperlipidemia, hypertension, or type 2 diabetes. In addition to lowering cholesterol levels, several studies have attributed statins with immunomodulatory and bactericidal properties. Therefore, the aim of this study was to investigate statins' antimicrobial activity against periodontal homeostasis bacteria.

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  • Peptidylarginine deiminase (PPAD) is a unique virulence factor found in pathogenic Porphyromonas species, particularly P. gingivalis, and is involved in creating citrullinated protein fragments linked to rheumatoid arthritis.
  • The research aimed to investigate the role of PPAD in biofilm formation and its influence on the adherence, invasion, and immune response of gingival keratinocytes to P. gingivalis.
  • Findings showed that PPAD activity does not affect bacterial biofilm formation or the ability of P. gingivalis to invade gingival cells, but it does modulate a set of host genes related to immune response.
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Sjögren's syndrome is a lymphoproliferative disease with autoimmune features characterized by mononuclear cell infiltration of exocrine glands, notably the lacrimal and salivary glands. These lymphoid infiltrations lead to dryness of the eyes (keratoconjunctivitis sicca), dryness of the mouth (xerostomia), and, frequently, dryness of other surfaces connected to exocrine glands. Sjögren's syndrome is associated with the production of autoantibodies because B-cell activation is a consistent immunoregulatory abnormality.

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In the HTML version of this article initially published, the name of author Diletta Di Mitri was miscoded in the XML such that Di was included as part of the given name instead of the family name. The error has been corrected in the HTML version of the article.

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The mechanisms by which mitochondrial metabolism supports cancer anabolism remain unclear. Here, we found that genetic and pharmacological inactivation of pyruvate dehydrogenase A1 (PDHA1), a subunit of the pyruvate dehydrogenase complex (PDC), inhibits prostate cancer development in mouse and human xenograft tumor models by affecting lipid biosynthesis. Mechanistically, we show that in prostate cancer, PDC localizes in both the mitochondria and the nucleus.

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Objective: Autoimmune polyendocrine syndrome type 1 (APS-1) is a rare, childhood onset disease caused by mutations in the () gene. Chronic mucocutaneous candidiasis (CMC) is one of the three major disease components and is, to date, mainly explained by the presence of neutralizing auto-antibodies against cytokines [interleukin (IL)-17A, IL-17F, and IL-22] from T helper 17 cells, which are critical for the protection against fungal infections. However, patients without current auto-antibodies also present CMC and we, therefore, hypothesized that other immune mechanisms contribute to CMC in APS-1.

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Carbamylation is a non-enzymatic post-translational modification induced upon exposure of free amino groups to urea-derived cyanate leading to irreversible changes of protein charge, structure and function. Levels of carbamylated proteins increase significantly in chronic kidney disease and carbamylated albumin is considered as an important biomarker indicating mortality risk. High plasma concentrations and long half-life make fibrinogen a prime target for carbamylation.

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  • Activation of NOTCH signalling is linked to advanced prostate cancer and treatment resistance, but the exact mechanism behind this connection is not yet clear.
  • Research shows that the loss of the PTEN gene in prostate tumors increases the expression of ADAM17, which activates NOTCH signalling, indicating that PTEN-deficient tumors are reliant on this pathway.
  • Inhibition of γ-secretase can halt the growth of Pten-deficient prostate tumors by causing cells to enter a state of senescence, suggesting that γ-secretase inhibitors may be a useful treatment for advanced prostate cancer patients.
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  • Rheumatoid arthritis involves inflammation of the joints and a type of cell called fibroblast-like synoviocytes proliferates during this condition.
  • Researchers tested small-molecule inhibitors that target a protein called CDK9 in mice with collagen-induced arthritis and found that treatment significantly delayed the disease and reduced its severity.
  • The study suggests that inhibiting CDK9 can lead to increased cell death (apoptosis) in immune cells, which could potentially make it a new treatment option for autoimmune and inflammatory diseases, in addition to cancer.
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Objective: Clinical expression of SS shows considerable interpatient heterogeneity. Thus, the aim of this study was to assess whether individual salivary proteomic profiles provide a framework for identification of disease-phenotype-driven biomarker signatures.

Methods: Using a 187-plex capture antibody-based assay, proteomic biomarker profiles from unstimulated whole saliva were generated from a SS-cohort representing six clinically distinct disease phenotypes.

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Carbamylation of lysine residues and protein N-termini is an ubiquitous, non-enzymatic post-translational modification. Carbamylation at sites of inflammation is due to cyanate formation during the neutrophil oxidative burst and may target lysine residues within the antimicrobial peptide LL-37. The bactericidal and immunomodulatory properties of LL-37 depend on its secondary structure and cationic nature, which are conferred by arginine and lysine residues.

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Aspiration pneumonia is a life-threatening infectious disease often caused by oral anaerobic and periodontal pathogens such as Porphyromonas gingivalis. This organism produces proteolytic enzymes, known as gingipains, which manipulate innate immune responses and promote chronic inflammation. Here, we challenged mice with P.

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Objectives: Herein, we investigate the presence and prognostic value of autoantibodies against carbamylated proteins (anti-CarP) in the serum of patients with primary Sjögren's syndrome (pSS).

Patients And Methods: Serum levels of anti-CarP antibodies were measured in Norwegian patients with pSS (n=78) and corresponding controls (n=74) using ELISA and analysed in relation with exocrine gland function, degree of salivary gland inflammation, signs of ectopic germinal centre (GC) formation and immunological markers. For univariate comparisons, the Mann-Whitney U test and χ(2) or Fisher's exact tests were used.

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  • Enhancing cellular senescence in tumors can lead to permanent cell growth arrest and trigger anti-tumor immune responses, presenting a potential avenue for cancer therapy.
  • Current therapies to promote senescence are not very selective, often affecting both cancerous and healthy cells.
  • Research identified casein kinase 2 (CK2) as a target that selectively increases senescence in PTEN-deficient cells by stabilizing Pml, revealing a new STAT3-CK2-PML network for developing targeted cancer treatments.
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  • The study aimed to find noninvasive diagnostic methods for Sjögren's syndrome (SS) by analyzing salivary proteomes, which could improve patient diagnosis and monitoring.
  • Through a detailed examination of salivary proteins, researchers identified significant differences in the protein profiles of SS patients compared to those with rheumatoid arthritis and healthy controls, with certain biomarkers allowing for accurate group classification.
  • The findings revealed that the molecular changes in saliva correlate with specific immune responses and tissue characteristics of SS, indicating that salivary biomarkers could enhance the understanding and diagnosis of this condition.
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Introduction: Our understanding of autoimmunity is skewed considerably towards the late stages of overt disease and chronic inflammation. Defining the targeted organ's role during emergence of autoimmune diseases is, however, critical in order to define their etiology, early and covert disease phases and delineate their molecular basis.

Methods: Using Sjögren's syndrome (SS) as an exemplary rheumatic autoimmune disease and temporal global gene-expression profiling, we systematically mapped the transcriptional landscapes and chronological interrelationships between biological themes involving the salivary glands' extracellular milieu.

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  • Sjögren's syndrome is a disease where the body attacks its own glands that make fluids, like saliva and tears.
  • People usually find out they have this disease when it's already advanced, and there aren't any good tests to catch it early.
  • Researchers are using mice in experiments to learn more about the early stages of Sjögren's syndrome and figure out what works to help treat it.
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