Thierry Jouault

Thierry Jouault
French Institute of Health and Medical Research | Inserm · infinite - U1286 and médecine/sciences

PhD

About

102
Publications
16,641
Reads
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3,845
Citations
Citations since 2016
17 Research Items
1139 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Additional affiliations
January 2020 - present
French Institute of Health and Medical Research
Position
  • Research Associate
July 2015 - present
Médecine/Sciences, ISSN : 0767-0974
Position
  • Deputy chief editor
Description
  • http://www.medecinesciences.org
September 2014 - present
French Institute of Health and Medical Research
Position
  • Research Associate
Education
July 1999 - July 1999
Université de Lille
Field of study
  • Immunology (Medical science)
May 1987 - December 1991
Sorbonne Université
Field of study
  • Immunology
June 1984 - November 1986
Université de Lille
Field of study
  • Immunology

Publications

Publications (102)
Article
Full-text available
Candida albicans is part of the human gastrointestinal (GI) microbiota. To better understand how C. albicansefficiently establishes GI colonization, we competitively challenged growth of 572 signature-tagged strains (~10% genome coverage), each conditionally overexpressing a single gene, in the murine gut. We identified CRZ2, a transcription factor...
Article
During conditioning, intestinal damage induces microbial translocation, which primes macrophage reactivity and leads to donor-derived T cell stimulation. Little is known about the role of intestinal health and macrophage reactivity prior to conditioning regarding the development of acute graft-versus-host disease (aGvHD) in patients undergoing allo...
Article
Full-text available
Background Toll-like receptors (TLRs) are the major pattern recognition receptors that mediate sensing of a wide range of microorganisms. TLR2 forms heterodimers with either TLR1 or TLR6, broadening its ligand diversity against pathogens. TLR1, TLR2 and TLR6 have been implicated in the recognition of Candida albicans, an opportunistic fungal pathog...
Conference Paper
Introduction et but de l’étude Des données récentes suggèrent qu’une nutrition entérale (NE) initiée précocement après une allogreffe de cellules souches hématopoïétiques (allo-CSH) diminue l’incidence et la gravité de la réaction aiguë du greffon contre l’hôte (GvHDa) qui constitue la première cause de morbi/mortalité après la greffe. Chez l’anima...
Article
Full-text available
The Cek1 MAP kinase (MAPK) mediates vegetative growth and cell wall biogenesis in the fungal pathogen Candida albicans. Alterations in the fungal cell wall caused by a defective Cek1‑mediated signaling pathway leads to increased β‑1,3‑glucan exposure influencing dectin‑1 fungal recognition by immune cells. We show here that cek1 cells also display...
Article
Full-text available
Mannose-binding lectin (MBL) is a soluble lectin of the innate immune system that is produced by the liver and secreted into the circulation where it activates the lectin complement pathway, enhances phagocytosis of microorganisms by leukocytes, and modulates inflammation. MBL can recognize patterns on the surface of different pathogens, including...
Article
Full-text available
β-1,2-mannosylation of Candida albicans glycoconjugates has been investigated through the identification of enzymes involved in the addition of β-1,2-oligomannosides (β-Mans) to phosphopeptidomannan and phospholipomannan. β-1,2-oligomannosides are supposed to have virulence properties that they confer to these glycoconjugates. In a previous study,...
Article
Pathogenic and non-pathogenic fungi synthesize glycosphingolipids, which have a crucial role in growth and viability. Glycosphingolipids also contribute to fungal-associated pathogenesis. The opportunistic yeast pathogen Candida albicans synthesizes phospholipomannan (PLM), which is a glycosphingolipid of the mannosylinositol phosphorylceramide fam...
Article
Candida albicans is part of the human mycobiota, coexisting with the plethora of bacterial species within the gut. To better understand how C. albicans efficiently establishes gastrointestinal (GI)-tract colonization, we competitively challenged growth of 579 signature-tagged C. albicans strains (∼ 10% genome coverage), each conditionally overexpre...
Article
Full-text available
Objective: The protein Hwp1, expressed on the pathogenic phase of Candida albicans, presents sequence analogy with the gluten protein gliadin and is also a substrate for transglutaminase. This had led to the suggestion that C. albicans infection (CI) may be a triggering factor for Celiac disease (CeD) onset. We investigated cross-immune reactivity...
Chapter
Infections caused by pathogenic fungi are a significant global problem: a situation exacerbated by the limited availability of good antifungal options. Being eukaryotic organisms, these pathogens are phylogenetically much closer to the human host than bacterial pathogens. This sets serious limits to the range of exploitable fungal-specific drug tar...
Article
Fungal cell walls contain several types of glycans, which play important roles in the pathogenesis of fungal infection and host immune response. Among them, glycosphingolipids have attracted much attention lately since they contribute actively to the fungi development and fungal-induced pathogenesis. Although glycosphingolipids are present in patho...
Article
Full-text available
Candida albicans produces a complex glycosphingolipid called phospholipomannan (PLM), which is present on the cell-wall surface of yeast and shed upon contact with host cells. The glycan moiety of PLM is composed of β-mannosides with degrees of polymerization up to 19 in C. albicans serotype A. PLM from serotype B strains displays a twofold decreas...
Article
La colonisation de la muqueuse digestive est la première étape qui contribue à l'installation de C. albicans chez son hôte et représente dans la majorité des cas le site de dissémination des candidoses systémiques. Notre travail vise à explorer les processus inflammatoires liés à la colonisation/infection par C. albicans. Pour cela, nous avons déve...
Article
Full-text available
Abstract The etiology of Crohn's disease (CD), an autoimmune, inflammatory bowel disease (IBD) which affects approximately one million people in Europe, is still unclear. Nevertheless, it is widely accepted that CD could result from an inappropriate inflammatory response to intestinal microorganisms in a genetically susceptible host. Most studies t...
Article
Most microbes are coated with carbohydrates that show remarkable structural variability and play a crucial role in mediating microbial-host interactions. Understanding the functions of cell wall glycoconjugates requires detailed knowledge of their molecular organization, diversity and heterogeneity. Here we use atomic force microscopy (AFM) with ti...
Article
Full-text available
Background Crohn’s disease (CD) is associated with elevated anti-glycans antibody response in 60% of CD patients, and 25% of healthy first-degree relatives (HFDRs), suggesting a genetic influence for this humoral response. In mice, anti-glucan antibody response depends on the NLRP3 inflammasome. Here, we explored the effect of mutated CARD8, a comp...
Article
Full-text available
The interaction of mannose-binding lectins (MBLs) with Candida albicans has been analyzed previously by microscopy and flow cytometry. We recently demonstrated that serum MBL levels vary during infection with Candida spp. and that serum MBLs are capable of interacting with yeast cell wall components. The aim of this study was to use, for the first...
Article
We read with great interest the article by Hueber et al 1 reporting on the dramatic failure of secukinumab, an anti-IL17A monoclonal antibody, in Crohn's disease (CD). This multicentre phase IIa study compared secukinumab with placebo in 59 patients with established moderate to severe CD. The study was prematurely stopped because the prespecified c...
Article
The high morbi-mortality associated with invasive candidiasis (IC) is a persistent problem in hospitals. Mannose-binding lectin (MBL) plays a role in innate immunity through its interaction with mannosylated molecules of Candida albicans. A correlation between MBL deficiency and vulvovaginal candidiasis or peritonitis has been reported. We investig...
Article
A family of nine genes encoding proteins involved in the synthesis of β-1,2 mannose adhesins of Candida albicans has been identified. Four of these genes, BMT1-4, encode enzymes acting stepwise to add β-mannoses on to cell-wall phosphopeptidomannan (PPM). None of these acts on phospholipomannan (PLM), a glycosphingolipid member of the mannose-inosi...
Article
NOD2 is involved in Crohn's disease (CD), but the role of NOD1 remains unclear. Anti-Saccharomyces cerevisiae antibodies (ASCA) are higher in CD patients and some of their relatives. Using family-based analyses we investigated the relationships between NOD2 mutations, NOD1 +32656 variant, and both the risk of CD and ASCA levels. We compared allelic...
Conference Paper
Full-text available
Background / Purpose: Candida sp colonize mucocutaneous surfaces. The first line of defense is triggered by phagocytic cells, especially by macrophages. These cells are able to recognize the cell wall components of the yeasts via different pattern recognition receptors. Among them, dectin-1 specifically recognizes β-1,3 and β-1,6-glucans, and is...
Article
Full-text available
The yeast Candida albicans has developed a variety of strategies to resist macrophage killing. In yeasts, accumulation of trehalose is one of the principal defense mechanisms under stress conditions. The gene-encoding trehalose-6-phosphate synthase (TPS1), which is responsible for trehalose synthesis, is induced in response to oxidative stress, as...
Article
Full-text available
The balance between pro- and anti-inflammatory cytokine production is a crucial aspect of infections caused by Candida albicans. We therefore investigated the effect of yeast concentration on the pro- and anti-inflammatory cytokine response. Production of tumor necrosis factor-alpha (TNF-α) by the murine macrophage cell line J774 decreased signific...
Article
Candida albicans is a diploid fungus that colonizes the gastrointestinal tract asymptomatically in a large proportion of the human population, but can cause life-threatening conditions in immunocompromised patients. Recent immunological investigations have revealed the Nod-like receptor pyrin domain-containing protein 3 (NLRP3) to be a cytosolic su...
Article
Full-text available
Anti-Saccharomyces cerevisiae antibodies (ASCAs) are present in 50-60% of patients with Crohn's disease (CD) and in 20-25% of their healthy relatives (HRs). The yeast, Candida albicans, has been shown to generate ASCAs, but the presence of C. albicans in the digestive tract of CD patients and their HRs has never been investigated. Therefore, we stu...
Article
Full-text available
Almost 80 % of the dry weight of the yeast cell wall is composed of glycans including mannans, glucans and chitin. Within this variable and complex edifice, glycans play a major role in their relation with the environment. Experimental antibodies allowed to define the localization, the variability of expression and the biological role of numerous n...
Article
The molecular interactions between commensal microorganisms and their host are basically different from those triggered by pathogens since they involve tolerance. When the commensal is genetically equipped to become an opportunistic pathogen, as is the case with Candida albicans, the picture becomes more complex. In this case, the balance between p...
Article
Recognition of pathogenic yeasts by host cells is based on components of the yeast cell wall, which are considered part of its virulence attributes. Cell wall glycans play an important role in the continuous interchange that regulates the balance between saprophytism and parasitism and between resistance and infection. Flow cytometry is a useful me...
Article
Full-text available
Background: Current research on Crohn's disease (CD) concerns molecular events related to loss of tolerance to microbes that could trigger or maintain inflammation in genetically susceptible individuals. CD is also associated with antimicrobial antibodies, including the antibodies we described against yeast oligomannosides (ASCA). This prompted us...
Article
Full-text available
Galectin-3 (Gal-3) is a multifunctional β-galactoside-binding lectin that senses self-derived and microbial glycoconjugates. Although Gal-3 is important in immune reactions and host defense in some experimental models, the function of Gal-3 during helminthic diseases (e.g., schistosomiasis) is still elusive. We show that, compared to wild-type Schi...
Article
Accumulation of trehalose by yeast is an important protective mechanism against different stress conditions. This study examined the effect of trehalose on several growth features, as well as its association with the intracellular survival of yeasts exposed to macrophages. A tps1/tps1 mutant and its parental counterpart, CAI4, exhibited similar gro...
Article
Full-text available
Stimulation of cells of the macrophage lineage is a crucial step in the sensing of yeasts by the immune system. Glycans present in both Candida albicans and Saccharomyces cerevisiae cell walls have been shown to act as ligands for different receptors leading to different stimulating pathways, some of which need receptor co-involvement. However, amo...
Article
The yeast Candida albicans is an opportunistic pathogen, part of the normal human microbial flora that causes infections in immunocompromised individuals with a high morbidity and mortality levels. Recognition of yeasts by host cells is based on components of the yeast cell wall, which are considered part of its virulence attributes. Cell wall glyc...
Article
Antibodies directed against oligomannose sequences alpha-1,3 Man (alpha-1,2 Man alpha-1,2 Man)(n) (n = 1 or 2), termed anti-Saccharomyces cerevisiae antibodies (ASCAs) are markers of Crohn's disease (CD). S. cerevisiae mannan, which expresses these haptens, is used to detect ASCA, but the exact immunogen for ASCA is unknown. Structural and genetic...
Article
1. Introduction: Pneumocystis carinii pneumonia(PCP) in immunocompetent hostsPneumocystis carinii is an opportunistic fungalagent that causes pneumonia in immunocomprom-ised patients, specially those with AIDS. Althoughthe complex host-parasite relationship is still incom-pletely understood, extensive data pertaining mostlyto immunocompromised pati...
Article
Candida albicans strains consist of serotypes A and B depending on the presence of terminal beta-1,2-linked mannose residues in the acid-stable part of serotype A phosphopeptidomannan (PPM). The distribution of C. albicans serotypes varies according to country and human host genetic and infectious backgrounds. However, these epidemiological traits...
Article
Full-text available
An increased occurrence of anti-Saccharomyces cerevisiae antibodies (ASCA) is reported in unaffected members of families with Crohn's disease. Whether ASCA is a familial trait due to genetic factors or is caused by exposure to environmental factors is unknown. To assess the genetic influence of ASCA we studied its occurrence in a twin population. A...
Article
Full-text available
Studies on Candida albicans phospholipomannan have suggested a novel biosynthetic pathway for yeast glycosphingolipids. This pathway is thought to diverge from the usual pathway at the mannose-inositol-phospho-ceramide (MIPC) step. To confirm this hypothesis, a C. albicans gene homologue for the Saccharomyces cerevisiae SUR1 gene was identified and...
Article
Candida albicans has adapted to live on the mucosal surfaces of animals. The human species has accepted it. By contrast to numerous other commensals, C. albicans has a prominent ability to invade virtually all tissues of a host presenting with natural or acquired defects in homeostasis. C. albicans uses considerable energy to synthesize glycans, wh...
Article
Full-text available
An enzyme immunoassay (EIA)-the commercially available Platelia Candida antigen test-developed for the diagnosis of systemic candidiasis is based on the detection of alpha-linked oligomannose residues (alpha-Man) released from Candida cells into the serum. This test has good specificity but has to be repeated frequently because of the rapid clearan...
Article
Candida albicans, the most common opportunistic fungal pathogen of humans is a part of the normal microbial flora. To investigate host-parasite interaction related to the commensal-pathogen switch of this yeast we compared the response of macrophages to C. albicans and to the non-pathogenic yeast Saccharomyces cerevisiae. In contrast to S. cerevisi...
Article
Full-text available
Candida albicans is a commensal dimorphic yeast of the digestive tract that causes hematogenously disseminated infections in immunocompromised individuals. Endogenous invasive candidiasis develops from C. albicans adhering to the intestinal epithelium. Adherence is mediated by the cell wall surface, a domain composed essentially of mannopyranosyl r...