Publications
Noguerol, Julie; Laviolette, Karl; Zahm, Margot; Chaubet, Adeline; Sahal, Ambrine; Détraves, Claire; Torres, Romain; Demont, Clothilde; Adoue, Véronique; Joffre, Carine; Cammas, Florence; van Meerwijk, Joost PM; Joffre, Olivier P. Heterochromatic gene silencing controls CD4+ T cell susceptibility to regulatory T cell-mediated suppression in a murine allograft model Article de journal Dans: Nat Commun, vol. 16, no. 1, 2025, ISSN: 2041-1723. @article{Noguerol2025, |
Kalinichenko, Artem; Huemer, Jakob; Humer, Theresa; Haimel, Matthias; Svaton, Michael; Socquet-Juglard, Nicolas; Casoni, Giovanna Perinetti; Prakash, Celine; von der Linde, Maximilian; Pazmandi, Julia; van de Wetering, Cheryl; Nunez-Fontarnau, Javier; Kamnev, Anton; Giuliani, Sarah; Jaeger, Martin G.; Hahn, Elisa; Dobner, Sarah; Rukavina, Andrea; Sylvander, Elise; Seigner, Jacqueline; Rashkova, Christina; Hoeger, Birgit; Traxlmayr, Michael W.; Lehner, Manfred; Bryceson, Yenan T.; Saarela, Janna; Hannich, Thomas; Castanon, Irinka; Winter, Georg; Dupré, Loïc; Boztug, Kaan Protein palmitoylation and sphingolipid metabolism control regulated exocytosis in cytotoxic lymphocytes Article de journal Dans: Sci. Immunol., vol. 10, no. 112, 2025, ISSN: 2470-9468. @article{Kalinichenko2025,<jats:p>Regulated exocytosis controls key cellular functions ranging from neurotransmitter release to the secretion of immune mediators, and its disruption is associated with numerous pathologies. The cytotoxic activity of lymphocytes is particularly dependent on regulated and polarized lytic granule delivery toward infected or malignant cells. Although genetic and mechanistic studies have identified factors regulating exocytosis in cytotoxic lymphocytes, a systematic mapping of the relevant factors and their relationships is lacking. Through a genome-scale CRISPR knockout screen in a human natural killer cell line, we characterized a complex genetic network regulating cytotoxic granule exocytosis, with lipid metabolism and protein lipidation among the most prominent pathways. By combining global protein palmitoylation and lipidomic studies, we found that ZDHHC17 drives palmitoylation of the core SNARE complex protein SNAP23 to target cytotoxic granules to GM1-rich lipid rafts whose assembly is controlled by serine palmitoyltransferase. In summary, our study identifies previously unrecognized factors essential for cytotoxic function in human lymphocytes and uncovers how lipid metabolism and protein palmitoylation are involved in the process of regulated exocytosis.</jats:p> |
Dinkelborg, Katja; Lhomme, Sébastien; Gömer, André Rat Hepatitis E Virus: An Emerging Challenge in Human Hepatitis Divers 2025, ISSN: 1600-0641. @misc{pmid41047081, |
Gourin, Claire; Flores, Thelma; Lefèvre, Camille; Alain, Sophie; Ligat, Gaëtan; Hantz, Sébastien Deciphering Letermovir’s Mode of Action and Resistance Mutation Effects Article de journal Dans: Antiviral Research, 2025, ISSN: 0166-3542. @article{Gourin2025,Human cytomegalovirus is an opportunistic pathogen responsible for severe infections in immunocompromised patients, the leading cause of congenital infections worldwide, and potentially implicated in carcinogenesis. The HCMV terminase complex (pUL56-pUL89-pUL51) has emerged as a key target for antiviral drug development. Letermovir, an antiviral agent targeting this complex, inhibits viral DNA packaging, but resistance-associated mutations have already been identified within subunits. Moreover, the precise mechanism of action of letermovir remains incompletely understood. We investigated interactions among terminase subunits in presence or absence of letermovir. Wild-type and mutant forms of these proteins (including resistance mutations V236M, L241P, L257I, C325Y, R369M in pUL56 and A95V in pUL51) were cloned into NanoBiT® PPI and pCI-neo vectors. Letermovir was added after transfection in HEK293T cells, and protein-protein interactions were assessed. Our results show letermovir does not disrupt interactions between wild-type terminase subunits. Resistance-associated mutations modulate the strength of these interactions, with certain mutations (such as pUL56 V236M and L257I) significantly enhancing or reducing binding. Notably, double mutants exhibited synergistic effects. Structural analyses using the AlphaFold3 platform revealed differences between the mutation site of pUL56 and its HSV-1 counterpart pUL28. A hypothetical 3D analysis based on the cryo-EM structure of the HSV-1 terminase complex showed that resistance mutations were oriented outside the complex. These findings suggest letermovir does not act by directly inhibiting interactions among HCMV terminase subunits. Analysis of resistance-associated mutations provides insight into the molecular basis of HCMV resistance to letermovir and may inform development of novel antiviral strategies targeting the terminase complex. |
Dupré, Loïc; Castanon, Irinka; Boztug, Kaan Immune-related actinopathies at the cross-road of immunodeficiency, autoimmunity and autoinflammation Article de journal Dans: Nat Rev Immunol, 2025, ISSN: 1474-1741. @article{Dupré2025, |
Zingkou, Eleni; Reynier, Marie; Pampalakis, Georgios; Serre, Guy; Jonca, Nathalie; Sotiropoulou, Georgia Deletion of the Epidermal Protease Aggravates the Symptoms of Congenital Ichthyosis -nEDD Article de journal Dans: Int J Mol Sci, vol. 26, no. 17, 2025, ISSN: 1422-0067. @article{pmid40943523,Congenital ichthyoses, now grouped under the acronym EDD (Epidermal Differentiation Disorders), include nonsyndromic forms (nEDD) that may be caused by loss-of-function mutations in the gene encoding corneodesmosin (-nEDD, formerly Peeling skin syndrome type 1). It is characterized by skin peeling, inflammation, itching and food allergies, while no specific therapy is currently available. High levels of KLK5, the serine protease that initiates the desquamation cascade, are found in the epidermis of -nEDD patients. Thus, we hypothesized that KLK5 inhibition would alleviate the symptoms of -nEDD and could serve as a new pharmacological target. A human epidermal equivalent (HEE) model for -nEDD was developed using shRNA-mediated knockdown. This model was characterized and used to assess the role of KLK5 knockdown on -nEDD. Also, mice were crossed with mice, the murine model of -nEDD, to examine in vivo the effect(s) of deletion in -nEDD. Both models recapitulated the -nEDD desquamating phenotype. Elimination of KLK5 aggravated the -nEDD phenotype. Epidermal proteolysis was surprisingly elevated, while severe ultrastructural (corneo)desmosomal alterations increased epidermal barrier permeability and detachment was manifested. Based on these results, we concluded that targeting epidermal proteolysis with ablation cannot compensate for the loss of corneodesmosin and rescue over-desquamation of the -nEDD. Possibly, in the absence of KLK5, other proteases take over which increases the severity of over-desquamation in . The translational outcome is that over-desquamation may not always be rescued by eliminating epidermal proteolysis, but fine protease modulation is more likely required. |
Paller, Amy S; Akiyama, Masashi; Hernández-Martín, Ángela; Mazereeuw-Hautier, Juliette; Sprecher, Eli 2025, ISSN: 1097-6787. @misc{pmid40907761, |
Hernández-Martín, Ángela; Paller, Amy S; Sprecher, Eli; Akiyama, Masashi; Mazereeuw-Hautier, Juliette Proposing an immune-inclusive lens to the new epidermal differentiation disorders classification: reply from authors Article de journal Dans: Br J Dermatol, vol. 193, no. 4, p. 800–802, 2025, ISSN: 1365-2133. @article{pmid40560203, |
Akiyama, Masashi; Choate, Keith; Hernández-Martín, Ángela; Aldwin-Easton, Mandy; Bodemer, Christine; Gostyński, Antoni; Hovnanian, Alain; Ishida-Yamamoto, Akemi; Malovitski, Kiril; O'Toole, Edel A; Paller, Amy S; Schmuth, Matthias; Schwartz, Janice; Sprecher, Eli; Teng, Joyce M C; Tournier, Céline Granier; Mazereeuw-Hautier, Juliette; Tadini, Gianluca; Fischer, Judith Nonsyndromic epidermal differentiation disorders: a new classification toward pathogenesis-based therapy Article de journal Dans: Br J Dermatol, vol. 193, no. 4, p. 619–641, 2025, ISSN: 1365-2133. @article{pmid40308026,Epidermal differentiation disorders (EDDs) encompass inherited conditions characterized by abnormal epidermal differentiation, including nonsyndromic and syndromic subtypes with more extensive cutaneous involvement or palmoplantar keratoderma. Nonsyndromic EDDs (nEDDs) are defined as disorders that primarily affect large areas of skin and adnexal structures without alterations in extracutaneous tissues resulting from the underlying genetic change. To facilitate the development of targeted therapies and to provide clinicians with clearer therapeutic guidance, we have developed a new nomenclature for EDDs that includes the causative altered gene and the nEDD subgroup designation, sometimes with a clinical or histological descriptor or acronym. Historically, many nEDDs have been named on the basis of phenotypic characteristics or associations that are now considered outdated or inappropriate. For example, the term 'harlequin ichthyosis' evokes potentially stigmatizing images. Similarly, the word 'ichthyosis' is derived from the Greek ichthys, meaning fish, and the Greek hystrix, meaning porcupine, further emphasizing the need to abandon derogatory terminology. As a result, the clinical relevance of the previous classification, which included eponymous and/or descriptive titles, has diminished. In the new, gene-based classification, old terms considered pejorative, such as ichthyosis, vulgaris, hystrix and harlequin have been eliminated and eponyms have been replaced. Among the 53 genetically distinct nEDDs are conditions formerly known as autosomal recessive congenital ichthyosis, erythrokeratodermia variabilis et progressiva, Hailey-Hailey disease and Darier-White disease. This review outlines the updated nomenclature and classifications of nEDDs, linked to detailed clinical descriptions and representative photographs to guide practitioners. |
Collercandy, Nived; Vellas, Camille; Nayrac, Manon; Requena, Mary; Richarme, Thomas; Iscache, Anne-Laure; Latour, Justine; Barange, Karl; Alric, Laurent; Martin-Blondel, Guillaume; Serino, Matteo; Izopet, Jacques; Delobel, Pierre Cytotoxic CX3CR1+ Vδ1 T cells clonally expand in an interplay of CMV, microbiota, and HIV-1 persistence in people on antiretroviral therapy Article de journal Dans: PLoS Pathog, vol. 21, no. 9, p. e1013489, 2025, ISSN: 1553-7374. @article{pmid40920867b,Vδ1 γδ T cells are key players in innate and adaptive immunity, particularly at mucosal interfaces such as the gut. An increase in circulating Vδ1 cells has long been observed in people with HIV-1, but remains poorly understood. We performed a comprehensive characterization of Vδ1 T cells in blood and duodenal intra-epithelial lymphocytes, obtained from endoscopic mucosal biopsies of 15 people with HIV-1 on antiretroviral therapy and 15 HIV-seronegative controls, in a substudy of the ANRS EP61 GALT study (NCT02906137). We deciphered the phenotype, functional profile, single-cell transcriptome and repertoire of Vδ1 cells and unraveled their relationships with the possible triggers involved, in particular CMV and microbiota. We also assessed whether Vδ1 T cells may play a role in controlling the HIV-1 reservoir. Vδ1 T cells were mainly terminally differentiated effectors that clonally expanded in the blood with some trafficking with the gut of people with HIV-1. Most expressed CX3CR1 and displayed a highly cytotoxic profile, but low cytokine production, supported by a transcriptomic shift towards enhanced effector lymphocytes. This expansion was associated with CMV status and markers of occult replication, but also with changes in the duodenal and blood-translocated microbiota. Cytotoxic, but not IFN-γ-producing, Vδ1 T cells were negatively associated with cell-associated HIV-1 RNA in both the blood and duodenal compartments. The increase in Vδ1 T cells observed in people with HIV-1 has multiple triggers, particularly CMV and microbiota, and may in turn contribute to the control of the HIV-1 reservoir. |
Collercandy, Nived; Vellas, Camille; Nayrac, Manon; Requena, Mary; Richarme, Thomas; Iscache, Anne-Laure; Latour, Justine; Barange, Karl; Alric, Laurent; Martin-Blondel, Guillaume; Serino, Matteo; Izopet, Jacques; Delobel, Pierre Cytotoxic CX3CR1+ Vδ1 T cells clonally expand in an interplay of CMV, microbiota, and HIV-1 persistence in people on antiretroviral therapy Article de journal Dans: PLoS Pathog, vol. 21, no. 9, p. e1013489, 2025, ISSN: 1553-7374. @article{pmid40920867,Vδ1 γδ T cells are key players in innate and adaptive immunity, particularly at mucosal interfaces such as the gut. An increase in circulating Vδ1 cells has long been observed in people with HIV-1, but remains poorly understood. We performed a comprehensive characterization of Vδ1 T cells in blood and duodenal intra-epithelial lymphocytes, obtained from endoscopic mucosal biopsies of 15 people with HIV-1 on antiretroviral therapy and 15 HIV-seronegative controls, in a substudy of the ANRS EP61 GALT study (NCT02906137). We deciphered the phenotype, functional profile, single-cell transcriptome and repertoire of Vδ1 cells and unraveled their relationships with the possible triggers involved, in particular CMV and microbiota. We also assessed whether Vδ1 T cells may play a role in controlling the HIV-1 reservoir. Vδ1 T cells were mainly terminally differentiated effectors that clonally expanded in the blood with some trafficking with the gut of people with HIV-1. Most expressed CX3CR1 and displayed a highly cytotoxic profile, but low cytokine production, supported by a transcriptomic shift towards enhanced effector lymphocytes. This expansion was associated with CMV status and markers of occult replication, but also with changes in the duodenal and blood-translocated microbiota. Cytotoxic, but not IFN-γ-producing, Vδ1 T cells were negatively associated with cell-associated HIV-1 RNA in both the blood and duodenal compartments. The increase in Vδ1 T cells observed in people with HIV-1 has multiple triggers, particularly CMV and microbiota, and may in turn contribute to the control of the HIV-1 reservoir. |
Worrall, William P M; Reber, Laurent L Current and future therapeutics targeting mast cells in disease Article de journal Dans: Pharmacology & Therapeutics, 2025. @article{Worrall2025, |
F, Martinez; C, Cotineau; C, Bories; L, Culié; S, Rodriguez; C, Pérals; S, Lachambre; V, Duplan-Eche; F, Bucciarelli; B, Pignolet; R, Liblau; L, Michel; M, Aloulou; N, Fazilleau Follicular regulatory T cells promote experimental autoimmune encephalomyelitis by supporting B cell egress from germinal centers. Article de journal Dans: Science Translational Medecine, vol. 17 , no. 813, 2025. @article{, |
Abdullah NS Serhan N, Gheziel N Maternal stress triggers early-life eczema through fetal mast cell programming Article de journal Dans: Nature, 2025. @article{serhan2025, |
Chavoshzadeh, Zahra; Fallah, Shahrzad; Zeinali, Vahide; Sharafian, Samin; Delavari, Samaneh; Mesdaghi, Mehrnaz; Djidjik, Reda; Belaid, Brahim; Ikinciogullari, Aydan; Haskologlu, Sule; Dogu, Figen; Genel, Ferah; Gulez, Nesrin; Baris, Safa; Ozen, Ahmet; Karakoc-Aydiner, Elif; Kiykim, Ayça; Meric, Zeynep; Kutukculer, Necil; Aygun, Ayse; Aksu, Guzide; Karaca, Neslihan Edeer; Geyik, Mehmet; Keles, Sevgi; Reisli, Ismail; Guner, Sukru Nail; Boukari, Rachida; Hakem, Saliha; Belbouab, Reda; Barbouche, Mohamed-Ridha; Ben-Mustapha, Imen; Mekki, Najla; Ben-Ali, Meriem; Sobh, Ali; Elnagdy, Marwa; Djenouhat, Kamel; Tahiat, Azzeddine; Shendi, Hiba Mohammed; Alkuwaiti, Amna; Nasrullayeva, Gulnara; Alfars, Tariq; Alsukaiti, Nashat; Massaad, Michel; Mehawej, Cybel; Megarbane, Andre; Irani, Carla; Elghazali, Gehad; Al-Tamemi, Salem; Khalifa, Nisreen; Alzyoud, Raed; Gultekin, Sara Sebnem Kilic; Kose, Hulya; Khodaverdy, Hedieh; Shamsian, Bibi Shahin; Eslami, Narges; Momen, Tooba; Sherkat, Roya; Aleyasin, Soheila; Esmaeilzadeh, Hossein; Ahanchian, Hamid; Salami, Fereshte; Fekrvand, Saba; Dupre, Loïc; Ochs, Hans D.; Rezaei, Nima; Al-Herz, Waleed; Abolhassani, Hassan Clinical and molecular findings in actin-related inborn errors of immunity: the middle East and North Africa registry Article de journal Dans: Front. Genet., vol. 16, 2025, ISSN: 1664-8021. @article{Chavoshzadeh2025,<jats:sec><jats:title>Background</jats:title><jats:p>The majority of monogenic inborn errors of immunity presenting as actinopathies were reported originally from the Middle East and North Africa (MENA) countries indicating a high prevalence of these entities in the region. However, their prognosis is unclear due to rarity and lack of comprehensive treatment outcomes.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>We evaluated clinical, immunological, and genetic abnormalities associated with 15 genetic entities of actinopathies. Based on the function of mutant genes in actin-regulatory pathways, patients were classified into CDC42- and RAC2-related subcategories.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>A total of 503 individuals (29.5% females) from 17 countries were considered with a median age of 120 months. Although most patients presented initially with allergic phenotypes (37.7%), the most prevalent manifestations throughout the lifespan were infection in respiratory tracts (72.2%). Primary clinical diagnosis was mainly combined immunodeficiencies (48.3%) and the majority of cases were molecularly assigned to the CDC42 pathway (64.8%). The most common genetic defects were reported within the <jats:italic>DOCK8</jats:italic> (n = 209) followed by the <jats:italic>WAS</jats:italic> (n = 94) and the <jats:italic>CARMIL2</jats:italic> (n = 15) genes. Hematopoietic stem cell transplantation (HSCT) was conducted on 24.0% of patients, which significantly improved survival in patients with defects in <jats:italic>WAS, DOCK8</jats:italic> and <jats:italic>DOCK2</jats:italic>. Overall mortality was 23.0%, mainly due to sepsis and malignancy.</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>Patients with defects in RAC2-associated regulators of actin usually present with late-onset symptoms due to normal immune profiles, but a higher rate of EBV and HPV infections, autoimmune cytopenia, asthma, and lymphoproliferation compared to defects in the CDC42 pathway. The severity of mutations in patients of the CDC42 group helps to estimate the prognosis of the disease and prioritization of HSCT.</jats:p></jats:sec> |
Hernández-Martín, Ángela; Paller, Amy S; Sprecher, Eli; Akiyama, Masashi; Tournier, Céline Granier; Aldwin-Easton, Mandy; Bodemer, Christine; Choate, Keith; Fischer, Judith; Gostynski, Antoni; Hovnanian, Alain; Ishida-Yamamoto, Akemi; O'Toole, Edel A; Schmuth, Matthias; Schwartz, Janice; Tadini, Gianluca; Teng, Joyce; Mazereeuw-Hautier, Juliette A proposal for a new pathogenesis-guided classification for inherited epidermal differentiation disorders Article de journal Dans: Br J Dermatol, vol. 193, no. 3, p. 544–548, 2025, ISSN: 1365-2133. @article{pmid40155206, |
Zhang, Brian C; Schneider-Hohendorf, Tilman; Elyanow, Rebecca; Pignolet, Beatrice; Falk, Simon; Wünsch, Christian; Deffner, Marie; Yusko, Erik; May, Damon; Mattox, Daniel; Dawin, Eva; Gerdes, Lisa Ann; Bucciarelli, Florence; Revie, Lisa; Antony, Gisela; Jarius, Sven; Seidel, Christiane; Senel, Makbule; Bittner, Stefan; Luessi, Felix; Havla, Joachim; Knop, Matthias; Friese, Manuel A; Rothacher, Susanne; Salmen, Anke; Hayashi, Fumie; Henry, Roland; Caillier, Stacy; Santaniello, Adam; and,; Seipelt, Maria; Heesen, Christoph; Nischwitz, Sandra; Bayas, Antonios; Tumani, Hayrettin; Bergh, Florian Then; Hörste, Gerd Meyer Zu; Kümpfel, Tania; Gross, Catharina C; Wildemann, Brigitte; Kerschensteiner, Martin; Gold, Ralf; Meuth, Sven G; Zipp, Frauke; Cree, Bruce A C; Oksenberg, Jorge; Wilson, Michael R; Hauser, Stephen L; Zamvil, Scott S; Klotz, Luisa; Liblau, Roland; Robins, Harlan; Sabatino, Joseph J; Wiendl, Heinz; Schwab, Nicholas HLA-A∗03:01 as predictive genetic biomarker for glatiramer acetate treatment response in multiple sclerosis: a retrospective cohort analysis Article de journal Dans: EBioMedicine, vol. 118, p. 105873, 2025, ISSN: 2352-3964. @article{pmid40749525,BACKGROUND: Glatiramer acetate (GA) is a well-tolerated treatment for multiple sclerosis (MS) and comparable in its efficacy to high-dose interferon beta (IFN). As a lack of validated treatment response biomarkers for MS hampers progress in personalised treatment, the study goal was to search for biomarkers of a successful treatment response utilising the known observation of T-cell expansions after GA treatment.nnMETHODS: T-cell receptor beta chain (TRB) sequencing was performed in 3021 patients with MS: a discovery cohort of 1627 patients with MS, 204 of whom had previously been treated with GA, and then validated in 1394 patients with MS, 424 of whom had previously been treated with GA. Clinical data from 1987 patients with MS treated with GA or IFN and available HLA information from the NationMS, ACP, EPIC, BIONAT, and CombiRx trial cohorts were used for a subsequent analysis.nnFINDINGS: Common GA-associated TRB expansions were exclusively detected in HLA-A∗03:01 or in HLA-DRB1∗15:01 backgrounds, within CD8+ effector- or CD4+ central-memory T cells. Both sets of common sequences clonally expanded after GA treatment in a first validation cohort and predicted GA exposure in two further validation cohorts. To evaluate whether restriction of public TRBs to only two HLA alleles is also associated with GA's clinical efficacy, we analysed five cohorts of patients with MS for a potential benefit of the two HLAs concerning the GA response compared to IFN. We consistently found positive interactions with HLA-A∗03:01. This included a relative reduction in relapse risk compared to IFN in HLA-A∗03:01 carriers of 33% (CombiRx: GA + IFN arm: HR 0.67 [95% CI: 0.47-0.96], p = 0.0269) and 34% (CombiRx: GA arm: HR 0.66 [95% CI: 0.45-0.98], p = 0.0377), and in risk to first relapse of 63% (NationMS: HR 0.37 [95% CI: 0.16-0.88], p = 0.0246), but no positive association with DRB1∗15:01.nnINTERPRETATION: HLA-A∗03:01 carrying patients with MS specifically benefit from GA treatment and GA significantly outperforms IFN in these patients. Therefore, determining HLA-A∗03:01 status before choosing a platform treatment for MS, would allow for a personalised treatment decision between GA and IFN.nnFUNDING: German Research Foundation, National Institutes of Health, National Multiple Sclerosis Society, Valhalla Foundation, Westridge Foundation, Mayer Foundation, German Federal Ministry of Education and Research. |
Belloy, Marcy; Schmitt, Benjamin A M; Marty, Florent H; Paut, Charlotte; Bassot, Emilie; Aïda, Amel; Alis, Marine; Zahm, Margot; Chaubet, Adeline; Garnier, Hugo; Flores-Aguilar, Thelma; Roitg, Elisa; Gutierrez-Loli, Renzo; Allart, Sophie; Ecalard, Romain; Boursereau, Raphaël; Ligat, Gaëtan; Gonzalez-Dunia, Daniel; Blanchard, Nicolas; Suberbielle, Elsa Toxoplasma gondii infection and chronic IL-1 elevation drive hippocampal DNA double-strand break signaling, leading to cognitive deficits Article de journal Dans: Nat Neurosci, 2025, ISSN: 1546-1726. @article{pmid40841478,Chronic inflammation, resulting from infections, is characterized by increased levels of cytokines including interleukin-1 (IL-1), but little is known about how IL-1 contributes to cognitive impairment, potentially via epigenetic processes. Here we demonstrate that mice chronically infected with the parasite Toxoplasma gondii exhibit impaired spatial memory, which is dependent on neuronal IL-1 signaling and mimicked by chronic exposure to IL-1β. Both T. gondii infection and chronic IL-1β drive H2A.X-dependent DNA double-strand break signaling in hippocampal neurons and invalidating neuronal H2A.X-dependent signaling blocks memory impairments caused by either exposure. Our results highlight the instrumental role of cytokine-induced double-strand-break-dependent signaling in spatial memory defects, which may be relevant to multiple brain diseases. |
Mafi, Sarah; Poyet, Jean-Luc; Alain, Sophie; Ligat, Gaëtan; Hantz, Sébastien First evidence of efficacy of peptides targeting the pUL56-pUL89 interaction domain of the human cytomegalovirus terminase complex Article de journal Dans: Antiviral Res, p. 106259, 2025, ISSN: 1872-9096. @article{pmid40816464,Human cytomegalovirus (HCMV) is a major cause of morbidity in immunocompromised patients and the leading viral cause of congenital infection. The toxicity and emergence of resistance associated with current antivirals underscore the need for alternative therapeutic strategies. The viral terminase complex (pUL56-pUL89-pUL51), essential for genome cleavage and packaging and without homologs in mammalian cells, represents a promising antiviral target. This study evaluated the antiviral potential of peptides targeting the pUL56-pUL89 interaction domain. Peptides derived from the minimal interaction domain between pUL56 and pUL89 (WF10: WMVVKYMGFF) or an extended sequence (PD17: PSEWMVVKYMGFFNFSD) were synthesized to interfere with this interaction. To optimize intracellular delivery, peptides were conjugated to a cell-penetrating peptide (CPP) derived from either the HIV-1 transactivator of transcription (TAT) or the Antennapedia homeodomain of Drosophila melanogaster (penetratin; PT). Peptide candidates- PT-WF10, TAT-WF10, and PT-PD17- were evaluated in cellular models for cytotoxicity, hemolysis, antiviral activity, and intracellular distribution. TAT-WF10 and PT-PD17 significantly reduced the cytopathic foci in HCMV-infected cells, with IC values of 58 μM and 39 μM, respectively. PT-WF10 lacked antiviral activity, induced significant cytotoxicity and hemolysis, and was mainly localized in the cytoplasm, with only minimal nuclear signal. TAT-WF10 showed cytoplasmic and nuclear distribution, no hemolysis, but induced long-term cytotoxicity from 40 μM. PT-PD17 exhibited cytoplasmic and nuclear distribution, with no significant cytotoxicity or hemolysis up to 80 μM. This study provides the first proof of concept that a peptide targeting the pUL56-pUL89 interaction domain can inhibit HCMV replication. PT-PD17 demonstrated antiviral activity, intracellular distribution, and a favorable safety profile. |
Kamphuis, Jasper B J; Loste, Alexia; Worrall, William P M; Serhan, Nadine; Villeneuve, Thomas; Apoil, Pol André; Trouche-Estival, Benjamin; group, IHU HealthAge INSPIRE/Open Science; Guilleminault, Laurent; Gaudenzio, Nicolas; Reber, Laurent L Aging Increases the Severity of Anaphylaxis Through Changes in Mast Cell Numbers and Histamine Sensitivity Article de journal Dans: Allergy, 2025. @article{nokey, |
Publications récentes
2023 |
Osma-Garcia, Ines C.; Mouysset, Mailys; Capitan-Sobrino, Dunja; Aubert, Yann; Turner, Martin; Diaz-Muñoz, Manuel D. The RNA binding proteins TIA1 and TIAL1 promote Mcl1 mRNA translation to protect germinal center responses from apoptosis Article de journal Dans: Cellular & Molecular Immunology, 2023, ISSN: 2042-0226. @article{Osma-Garcia2023b,Germinal centers (GCs) are essential for the establishment of long-lasting antibody responses. GC B cells rely on post-transcriptional RNA mechanisms to translate activation-associated transcriptional programs into functional changes in the cell proteome. However, the critical proteins driving these key mechanisms are still unknown. Here, we show that the RNA binding proteins TIA1 and TIAL1 are required for the generation of long-lasting GC responses. TIA1- and TIAL1-deficient GC B cells fail to undergo antigen-mediated positive selection, expansion and differentiation into B-cell clones producing high-affinity antibodies. Mechanistically, TIA1 and TIAL1 control the transcriptional identity of dark- and light-zone GC B cells and enable timely expression of the prosurvival molecule MCL1. Thus, we demonstrate here that TIA1 and TIAL1 are key players in the post-transcriptional program that selects high-affinity antigen-specific GC B cells. |
P, Lifar; F, Montastruc; LL, Reber; JF, Magnaval; L, Guilleminault Parasitic Infections and Biological Therapies Targeting Type 2 Inflammation: A VigiBase Study Article de journal Dans: 2023. @article{36883943, |
E, Lamanna; E, Conde; A, Mougel; J, Bonnefoy; F, Colaone; O, Godon; S, Hamdi; JBJ, Kamphuis; B, Drouet; V, Serra; P, Bruhns; LL, Reber A vaccine targeting human IL-4 and IL-13 protects against asthma in humanized mice. Article de journal Dans: Allergy, 2023. @article{36799426, |
2022 |
Kamphuis JBJ Worrall WPM, Stackowicz J The anti-FcεRI antibody MAR-1 depletes basophils and cross-reacts with myeloid cells through its Fc portion Article de journal Dans: Allergy, vol. 77, no. 6, p. 1903-1906, 2022. @article{WPM2022, |
Gaudenzio N, Liblau RS. Immune cells impede repair of old neurons Article de journal Dans: Science, vol. 376, no. 6594, p. 694-695, 2022. @article{N2022,The regenerative capacity of older people is reduced, resulting in decreased tissue function and resilience. Accordingly, the regeneration of the sciatic nerve after injury has been reported to be less efficient and slower in older people (1). One of the hallmarks of aging is altered intercellular communication, which is often accompanied by increased density of immune cells within tissues and excessive release of proinflammatory mediators, called inflammaging (2, 3). In this context, the immune system disturbs tissue homeostasis and impedes functional recovery. However, the precise mechanisms underlying this pathophysiological process are largely elusive, which is a barrier to rational treatment design. On page 715 of this issue, Zhou et al. (4) describe a mechanism by which aged sensory neurons release the chemoattractive protein C-X-C motif chemokine ligand 13 (CXCL13). Upon sciatic nerve injury in aged, but not young, mice, this results in the recruitment of CD8+ T cells that prevent axonal regeneration. |
Congy-Jolivet, N.; Cenac, C.; Dellacasagrande, J.; Puissant-Lubrano, B.; Apoil, P. A.; Guedj, K.; Abbas, F.; Laffont, S.; Sourdet, S.; Guyonnet, S.; Nourhashemi, F.; Guery, J. C.; Blancher, A. Monocytes are the main source of STING-mediated IFN-alpha production Article de journal Dans: EBioMedicine, vol. 80, p. 104047, 2022, ISSN: 2352-3964 (Electronic) 2352-3964 (Linking). @article{RN2018, |
Yang, Cui; Blaize, Gaëtan; Marrocco, Rémi; Rouquié, Nelly; Bories, Cyrielle; Gador, Mylène; Mélique, Suzanne; Joulia, Emeline; Benamar, Mehdi; Dejean, Anne S.; Daniels-Treffandier, Hélène; Love, Paul E.; Fazilleau, Nicolas; Saoudi, Abdelhadi; Lesourne, Renaud THEMIS enhances the magnitude of normal and neuroinflammatory type 1 immune responses by promoting TCR-independent signals Article de journal Dans: Science Signaling, vol. 15, no. 742, p. eabl5343, 2022, (Publisher: American Association for the Advancement of Science). @article{yang_themis_2022, |
Argenty, Jérémy; Rouquié, Nelly; Bories, Cyrielle; Mélique, Suzanne; Duplan-Eche, Valérie; Saoudi, Abdelhadi; Fazilleau, Nicolas; Lesourne, Renaud A selective LIS1 requirement for mitotic spindle assembly discriminates distinct Ŧ-cell division mechanisms within the Ŧ-cell lineage Article de journal Dans: Elife, vol. 11, p. e80277, 2022, ISSN: 2050-084X. @article{argenty_selective_2022,The ability to proliferate is a common feature of most T-cell populations. However, proliferation follows different cell-cycle dynamics and is coupled to different functional outcomes according to T-cell subsets. Whether the mitotic machineries supporting these qualitatively distinct proliferative responses are identical remains unknown. Here, we show that disruption of the microtubule-associated protein LIS1 in mouse models leads to proliferative defects associated with a blockade of T-cell development after β-selection and of peripheral CD4+ T-cell expansion after antigen priming. In contrast, cell divisions in CD8+ T cells occurred independently of LIS1 following T-cell antigen receptor stimulation, although LIS1 was required for proliferation elicited by pharmacological activation. In thymocytes and CD4+ T cells, LIS1 deficiency did not affect signaling events leading to activation but led to an interruption of proliferation after the initial round of division and to p53-induced cell death. Proliferative defects resulted from a mitotic failure, characterized by the presence of extra-centrosomes and the formation of multipolar spindles, causing abnormal chromosomes congression during metaphase and separation during telophase. LIS1 was required to stabilize dynein/dynactin complexes, which promote chromosome attachment to mitotic spindles and ensure centrosome integrity. Together, these results suggest that proliferative responses are supported by distinct mitotic machineries across T-cell subsets. |
Giang, N.; Villeneuve, T.; Maire, K.; Mejia, J. E.; Guery, J. C.; Pelletier, L.; Savignac, M. PKCalpha interacts with Ca(v) 1.3 calcium channels to promote the Ca(v) 1.2/Ca(v) 1.3 duo tuning Th2 functions Article de journal Dans: Allergy, 2022, ISSN: 1398-9995 (Electronic) 0105-4538 (Linking). @article{RN2049, |
Giang, N.; Mars, M.; Moreau, M.; Mejia, J. E.; Bouchaud, G.; Magnan, A.; Michelet, M.; Ronsin, B.; Murphy, G. G.; Striessnig, J.; Guery, J. C.; Pelletier, L.; Savignac, M. Separation of the Cav1.2-Cav1.3 calcium channel duo prevents type 2 allergic airway inflammation Article de journal Dans: Allergy, vol. 77, no. 2, p. 525-539, 2022, ISSN: 1398-9995 (Electronic) 0105-4538 (Linking). @article{RN1997, |
Han, Mingyu; Cantaloube-Ferrieu, Vincent; Xie, Maorong; Armani-Tourret, Marie; Woottum, Marie; Pagès, Jean-Christophe; Colin, Philippe; Lagane, Bernard; Benichou, Serge HIV-1 cell-to-cell spread overcomes the virus entry block of non-macrophage-tropic strains in macrophages Article de journal Dans: PLoS pathogens, vol. 18, no. 5, p. e1010335, 2022, ISSN: 1553-7374. @article{han_hiv-1_2022,Macrophages (MΦ) are increasingly recognized as HIV-1 target cells involved in the pathogenesis and persistence of infection. Paradoxically, in vitro infection assays suggest that virus isolates are mostly T-cell-tropic and rarely MΦ-tropic. The latter are assumed to emerge under CD4+ T-cell paucity in tissues such as the brain or at late stage when the CD4 T-cell count declines. However, assays to qualify HIV-1 tropism use cell-free viral particles and may not fully reflect the conditions of in vivo MΦ infection through cell-to-cell viral transfer. Here, we investigated the capacity of viruses expressing primary envelope glycoproteins (Envs) with CCR5 and/or CXCR4 usage from different stages of infection, including transmitted/founder Envs, to infect MΦ by a cell-free mode and through cell-to-cell transfer from infected CD4+ T cells. The results show that most viruses were unable to enter MΦ as cell-free particles, in agreement with the current view that non-M-tropic viruses inefficiently use CD4 and/or CCR5 or CXCR4 entry receptors on MΦ. In contrast, all viruses could be effectively cell-to-cell transferred to MΦ from infected CD4+ T cells. We further showed that viral transfer proceeded through Env-dependent cell-cell fusion of infected T cells with MΦ targets, leading to the formation of productively infected multinucleated giant cells. Compared to cell-free infection, infected T-cell/MΦ contacts showed enhanced interactions of R5 M- and non-M-tropic Envs with CD4 and CCR5, resulting in a reduced dependence on receptor expression levels on MΦ for viral entry. Altogether, our results show that virus cell-to-cell transfer overcomes the entry block of isolates initially defined as non-macrophage-tropic, indicating that HIV-1 has a more prevalent tropism for MΦ than initially suggested. This sheds light into the role of this route of virus cell-to-cell transfer to MΦ in CD4+ T cell rich tissues for HIV-1 transmission, dissemination and formation of tissue viral reservoirs. |
2021 |
Bertrand R Conde E, Balbino B Dual vaccination against IL-4 and IL-13 protects against chronic allergic asthma in mice Article de journal Dans: Nature Communications, vol. 12, no. 1, p. 2574, 2021. @article{E2021, |
Darrigues, Julie; Santamaria, Jeremy C.; Galindo-Albarrán, Ariel; Robey, Ellen A.; Joffre, Olivier P.; van Meerwijk, Joost P. M.; Romagnoli, Paola Robust intrathymic development of regulatory T cells in young NOD mice is rapidly restrained by recirculating cells Article de journal Dans: European Journal of Immunology, 2021, ISSN: 15214141. @article{Darrigues2020b,Regulatory T lymphocytes (Treg) play a vital role in the protection of the organism against autoimmune pathology. It is therefore paradoxical that comparatively large numbers of Treg were found in the thymus of type I diabetes-prone NOD mice. The Treg population in the thymus is composed of newly developing cells and cells that had recirculated from the periphery back to the thymus. We here demonstrate that exceptionally large numbers of Treg develop in the thymus of young, but not adult, NOD mice. Once emigrated from the thymus, an unusually large proportion of these Treg is activated in the periphery, which causes a particularly abundant accumulation of recirculating Treg in the thymus. These cells then rapidly inhibit de novo development of Treg. The proportions of developing Treg thus reach levels similar to or lower than those found in most other, type 1 diabetes-resistant, inbred mouse strains. Thus, in adult NOD mice the particularly large Treg-niche is actually composed of mostly recirculating cells and only few newly developing Treg. |
Blanquart, E.; Mandonnet, A.; Mars, M.; Cenac, C.; Anesi, N.; Mercier, P.; Audouard, C.; Roga, S.; Serrano de Almeida, G.; Bevan, C. L.; Girard, J. P.; Pelletier, L.; Laffont, S.; Guery, J. C. Targeting androgen signaling in ILC2s protects from IL-33-driven lung inflammation, independently of KLRG1 Article de journal Dans: J Allergy Clin Immunol, 2021, ISSN: 1097-6825 (Electronic) 0091-6749 (Linking). @article{RN1947, |
El Costa, H.; Gouilly, J.; Abravanel, F.; Bahraoui, E.; Peron, J. M.; Kamar, N.; Jabrane-Ferrat, N.; Izopet, J. Effector memory CD8 T cell response elicits Hepatitis E Virus genotype 3 pathogenesis in the elderly Article de journal Dans: PLoS Pathog, vol. 17, no. 2, p. e1009367, 2021, ISSN: 1553-7374 (Electronic) 1553-7366 (Linking). @article{RN4b, |
Armani-Tourret, M.; Zhou, Z.; Gasser, R.; Staropoli, I.; Cantaloube-Ferrieu, V.; Benureau, Y.; Garcia-Perez, J.; Perez-Olmeda, M.; Lorin, V.; Puissant-Lubrano, B.; Assoumou, L.; Delaugerre, C.; Lelievre, J. D.; Levy, Y.; Mouquet, H.; Martin-Blondel, G.; Alcami, J.; Arenzana-Seisdedos, F.; Izopet, J.; Colin, P.; Lagane, B. Mechanisms of HIV-1 evasion to the antiviral activity of chemokine CXCL12 indicate potential links with pathogenesis Article de journal Dans: PLoS Pathog, vol. 17, no. 4, p. e1009526, 2021, ISSN: 1553-7374 (Electronic) 1553-7366 (Linking). @article{RN3b, |
Cenac, C.; Ducatez, M.; Guery, J. C. Hydroxychloroquine inhibits proteolytic processing of endogenous TLR7 protein in human primary plasmacytoid dendritic cells Article de journal Dans: Eur J Immunol, 2021, ISSN: 1521-4141 (Electronic) 0014-2980 (Linking). @article{RN1956, |
Osma-Garcia, I. C.; Capitan-Sobrino, D.; Mouysset, M.; Bell, S. E.; Lebeurrier, M.; Turner, M.; Diaz-Munoz, M. D. The RNA-binding protein HuR is required for maintenance of the germinal centre response Article de journal Dans: Nat Commun, vol. 12, no. 1, p. 6556, 2021, ISSN: 2041-1723 (Electronic) 2041-1723 (Linking). @article{RN2, |
Stackowicz, J.; Gaudenzio, N.; Serhan, N.; Conde, E.; Godon, O.; Marichal, T.; Starkl, P.; Balbino, B.; Roers, A.; Bruhns, P.; Jonsson, F.; Moguelet, P.; Georgin-Lavialle, S.; Broderick, L.; Hoffman, H. M.; Galli, S. J.; Reber, L. L. Neutrophil-specific gain-of-function mutations in Nlrp3 promote development of cryopyrin-associated periodic syndrome Article de journal Dans: J Exp Med, vol. 218, no. 10, 2021, ISSN: 1540-9538 (Electronic) 0022-1007 (Linking). @article{RN2330, |
2020 |
Briand-Mésange, Fabienne; Pons, Véronique; Allart, Sophie; Masquelier, Julien; Chicanne, Gaëtan; Beton, Nicolas; Payrastre, Bernard; Muccioli, Giulio G.; Ausseil, Jérôme; Davignon, Jean Luc; Salles, Jean Pierre; Chap, Hugues Glycerophosphodiesterase 3 (GDE3) is a lysophosphatidylinositol-specific ectophospholipase C acting as an endocannabinoid signaling switch Article de journal Dans: Journal of Biological Chemistry, vol. 295, no. 46, p. 15767–15781, 2020, ISSN: 1083351X. @article{Briand-Mesange2020,Endocannabinoid signaling plays a regulatory role in various (neuro)biological functions. 2-arachidonoylglycerol (2-AG) is the most abundant endocannabinoid, and although its canonical biosynthetic pathway involving phosphoinositide-specific phospholipase C and diacylglycerol lipase a is known, alternative pathways remain unsettled. Here, we characterize a non-canonical pathway implicating glycerophosphodiesterase 3 (GDE3, from GDPD2 gene). Human GDE3 expressed in HEK293T cell membranes catalyzed the conversion of lysophosphatidylinositol (LPI) into monoacylglycerol and inositol-1-phosphate. The enzyme was equally active against 1-acyl and 2-acyl LPI. When using 2-acyl LPI, where arachidonic acid is the predominant fatty acid, LC-MS analysis identified 2-AG as the main product of LPI hydrolysis by GDE3. Furthermore, inositol-1-phosphate release into the medium occurred upon addition of LPI to intact cells, suggesting that GDE3 is actually an ecto-lysophospholipase C. In cells expressing G-protein–coupled receptor GPR55, GDE3 abolished 1-acyl LPI–induced signaling. In contrast, upon simultaneous expression of GDE3 and cannabinoid receptor CB2, 2-acyl LPI evoked the same signal as that induced by 2-AG. These data strongly suggest that, in addition to degrading the GPR55 LPI ligand, GDE3 can act as a switch between GPR55 and CB2 signaling. Coincident with a major expression of both GDE3 and CB2 in the spleen, spleens from transgenic mice lacking GDE3 displayed doubling of LPI content compared with WT mice. Decreased production of 2-AG in whole spleen was also observed, supporting the in vivo relevance of our findings. These data thus open a new research avenue in the field of endocannabinoid generation and reinforce the view of GPR55 and LPI being genuine actors of the endocannabinoid system. |
Balbino, B; Herviou, P; o Godon,; Stackowicz, J; Goff, O R; Iannascoli, B; Sterlin, D; Brûlé, S; Millot, G A; Harris, F M; Voronina, V A; Nadeau, K C; Macdonald, L E; Murphy, A J; Bruhns, P; Reber, L L The anti-IgE mAb omalizumab induces adverse reactions by engaging Fcγ receptors. Article de journal Dans: J Clin Invest, vol. 130, no. 3, p. 1330-1335, 2020. @article{B2020, |
Meixiong, James; Basso, Lilian; Dong, Xinzhong; Gaudenzio, Nicolas Nociceptor-Mast Cell Sensory Clusters as Regulators of Skin Homeostasis. Article de journal Dans: Trends in neurosciences, vol. 43, no. 3, p. 130–132, 2020, ISSN: 1878-108X (Electronic). @article{Meixiong2020,Recent studies revealed the existence of unique functional links between mast cells and nociceptors in the skin. Here, we propose that mast cells and nociceptors form a single regulatory unit in both physiology and disease. In this model, MrgprB2/X2 signaling is a primary mechanism by which mast cells functionally interact with nociceptors to form specialized neuroimmune clusters that regulate pain, inflammation, and itch. |
Nayrac, Manon; Requena, Mary; Loiseau, Claire; Cazabat, Michelle; Suc, Bertrand; Carrere, Nicolas; Barange, Karl; Alric, Laurent; Martin-Blondel, Guillaume; Izopet, Jacques; Delobel, Pierre Th22 cells are efficiently recruited in the gut by CCL28 as an alternative to CCL20 but do not compensate for the loss of Th17 cells in treated HIV-1-infected individuals Article de journal Dans: Mucosal Immunology, vol. 14, no. 1, p. 219–228, 2020, ISSN: 1933-0219, 1935-3456. @article{nayrac_th22_2020, |
Malviya, M.; Saoudi, A.; Bauer, J.; Fillatreau, S.; Liblau, R. Treatment of experimental autoimmune encephalomyelitis with engineered bi-specific Foxp3+ regulatory CD4+ T cells Article de journal Dans: J Autoimmun, vol. 108, p. 102401, 2020, ISSN: 1095-9157 (Electronic) 0896-8411 (Linking). @article{RN54, |
Chen, Qian; Gouilly, Jordi; Ferrat, Yann J.; Espino, Ana; Glaziou, Quentin; Cartron, Géraldine; El Costa, Hicham; Al-Daccak, Reem; Jabrane-Ferrat, Nabila Metabolic reprogramming by Zika virus provokes inflammation in human placenta Article de journal Dans: Nature Communications, vol. 11, no. 1, 2020, ISSN: 2041-1723. @article{chen_metabolic_2020, |
Marion, Olivier; Lhomme, Sebastien; Nayrac, Manon; Dubois, Martine; Pucelle, Mélanie; Requena, Mary; Migueres, Marion; Abravanel, Florence; Peron, Jean Marie; Carrere, Nicolas; Suc, Bertrand; Delobel, Pierre; Kamar, Nassim; Izopet, Jacques Hepatitis E virus replication in human intestinal cells Article de journal Dans: Gut, vol. 69, no. 5, p. 901–910, 2020, ISSN: 0017-5749, 1468-3288. @article{marion_hepatitis_2020, |
Raymond, Stéphanie; Piffaut, Marie; Bigot, Jonathan; Cazabat, Michelle; Montes, Brigitte; Bertrand, Kevin; Martin-Blondel, Guillaume; Izopet, Jacques; Delobel, Pierre Sexual transmission of an extensively drug-resistant HIV-1 strain Article de journal Dans: The Lancet HIV, vol. 7, no. 8, p. e529–e530, 2020, ISSN: 23523018. @article{raymond_sexual_2020, |
Azar, P.; Mejía, J. E.; Cenac, C.; Shaiykova, A.; Youness, A.; Laffont, S.; Essat, A.; Izopet, J.; Passaes, C.; Müller-Trutwin, M.; Delobel, P.; Meyer, L.; Guéry, J. C. TLR7 dosage polymorphism shapes interferogenesis and HIV-1 acute viremia in women Article de journal Dans: JCI Insight, vol. 5, no. 12, 2020, ISSN: 2379-3708. @article{RN1940, |
Lamsoul, Isabelle; Dupré, Loïc; Lutz, Pierre G. Molecular Tuning of Filamin A Activities in the Context of Adhesion and Migration Article de journal Dans: Front Cell Dev Biol, vol. 8, p. 591323, 2020, ISSN: 2296-634X. @article{lamsoul_molecular_2020,The dynamic organization of actin cytoskeleton meshworks relies on multiple actin-binding proteins endowed with distinct actin-remodeling activities. Filamin A is a large multi-domain scaffolding protein that cross-links actin filaments with orthogonal orientation in response to various stimuli. As such it plays key roles in the modulation of cell shape, cell motility, and differentiation throughout development and adult life. The essentiality and complexity of Filamin A is highlighted by mutations that lead to a variety of severe human disorders affecting multiple organs. One of the most conserved activity of Filamin A is to bridge the actin cytoskeleton to integrins, thereby maintaining the later in an inactive state. We here review the numerous mechanisms cells have developed to adjust Filamin A content and activity and focus on the function of Filamin A as a gatekeeper to integrin activation and associated adhesion and motility. |
Hassan, A.; Wlodarczyk, M. F.; Benamar, M.; Bassot, E.; Salvioni, A.; Kassem, S.; Berry, A.; Saoudi, A.; Blanchard, N. A Virus Hosted in Malaria-Infected Blood Protects against T Cell-Mediated Inflammatory Diseases by Impairing DC Function in a Type I IFN-Dependent Manner Article de journal Dans: mBio, vol. 11, no. 2, 2020, (doi: 10.1128/mBio.03394-19.). @article{c,Coinfections shape immunity and influence the development of inflammatory diseases, resulting in detrimental or beneficial outcome. Coinfections with concurrent Plasmodium species can alter malaria clinical evolution, and malaria infection itself can modulate autoimmune reactions. Yet, the underlying mechanisms remain ill defined. Here, we demonstrate that the protective effects of some rodent malaria strains on T cell-mediated inflammatory pathologies are due to an RNA virus cohosted in malaria-parasitized blood. We show that live and extracts of blood parasitized by Plasmodium berghei K173 or Plasmodium yoelii 17X YM, protect against P. berghei ANKA-induced experimental cerebral malaria (ECM) and myelin oligodendrocyte glycoprotein (MOG)/complete Freund's adjuvant (CFA)-induced experimental autoimmune encephalomyelitis (EAE), and that protection is associated with a strong type I interferon (IFN-I) signature. We detected the presence of the RNA virus lactate dehydrogenase-elevating virus (LDV) in the protective Plasmodium stabilates and we established that LDV infection alone was necessary and sufficient to recapitulate the protective effects on ECM and EAE. In ECM, protection resulted from an IFN-I-mediated reduction in the abundance of splenic conventional dendritic cell and impairment of their ability to produce interleukin (IL)-12p70, leading to a decrease in pathogenic CD4(+) Th1 responses. In EAE, LDV infection induced IFN-I-mediated abrogation of IL-23, thereby preventing the differentiation of granulocyte-macrophage colony-stimulating factor (GM-CSF)-producing encephalitogenic CD4(+) T cells. Our work identifies a virus cohosted in several Plasmodium stabilates across the community and deciphers its major consequences on the host immune system. More generally, our data emphasize the importance of considering contemporaneous infections for the understanding of malaria-associated and autoimmune diseases.IMPORTANCE Any infection modifies the host immune status, potentially ameliorating or aggravating the pathophysiology of a simultaneous inflammatory condition. In the course of investigating how malaria infection modulates the severity of contemporaneous inflammatory diseases, we identified a nonpathogenic mouse virus in stabilates of two widely used rodent parasite lines: Plasmodium berghei K173 and Plasmodium yoelii 17X YM. We established that the protective effects of these Plasmodium lines on cerebral malaria and multiple sclerosis are exclusively due to this virus. The virus induces a massive type I interferon (IFN-I) response and causes quantitative and qualitative defects in the ability of dendritic cells to promote pathogenic T cell responses. Beyond revealing a possible confounding factor in rodent malaria models, our work uncovers some bases by which a seemingly innocuous viral (co)infection profoundly changes the immunopathophysiology of inflammatory diseases. |
2019 |
Serhan, N.; Basso, L.; Sibilano, R.; Petitfils, C.; Meixiong, J.; Bonnart, C.; Reber, L L.; Marichal, T.; Starkl, P.; Cenac, N.; Dong, X.; Tsai, M.; Galli, S J.; Gaudenzio, N. House dust mites activate nociceptor-mast cell clusters to drive type 2 skin inflammation Article de journal Dans: Nat Immunol, vol. 20, no. 11, p. 1435-1443, 2019. @article{N2019, |
Domingo, Cristina; Fraissinet, Juliane; Ansah, Patrick O.; Kelly, Corey; Bhat, Niranjan; Sow, Samba O.; Mejía, José E. Long-term immunity against yellow fever in children vaccinated during infancy: a longitudinal cohort study Article de journal Dans: Lancet Infect Dis, 2019, ISSN: 1473-3099. @article{RN3090,Background. A single dose of vaccine against yellow fever is routinely administered to infants aged 9–12 months under the Expanded Programme on Immunization, but the long-term outcome of vaccination in this age group is unknown. We aimed to evaluate the long-term persistence of neutralising antibodies to yellow fever virus following routine vaccination in infancy. Methods. We did a longitudinal cohort study, using a microneutralisation assay to measure protective antibodies against yellow fever in Malian and Ghanaian children vaccinated around age 9 months and followed up for 4·5 years (Mali), or 2·3 and 6·0 years (Ghana). Healthy children with available day-0 sera, a complete follow-up history, and no record of yellow fever revaccination were included; children seropositive for yellow fever at baseline were excluded. We standardised antibody concentrations with reference to the yellow fever WHO International Standard. Findings. We included 587 Malian and 436 Ghanaian children vaccinated between June 5, 2009, and Dec 26, 2012. In the Malian group, 296 (50·4%, 95% CI 46·4–54·5) were seropositive (antibody concentration ≥0·5 IU/mL) 4·5 years after vaccination. Among the Ghanaian children, 121 (27·8%, 23·5–32·0) were seropositive after 2·3 years. These results show a large decrease from the proportions of seropositive infants 28 days after vaccination, 96·7% in Mali and 72·7% in Ghana, reported by a previous study of both study populations. The number of seropositive children increased to 188 (43·1%, 95% CI 38·5–47·8) in the Ghanaian group 6·0 years after vaccination, but this result might be confounded by unrecorded revaccination or natural infection with wild yellow fever virus during a 2011–12 outbreak in northern Ghana. Interpretation. Rapid waning of immunity during the early years after vaccination of 9-month-old infants argues for a revision of the single-dose recommendation for this target population in endemic countries. The short duration of immunity in many vaccinees suggests that booster vaccination is necessary to meet the 80% population immunity threshold for prevention of yellow fever outbreaks. |
Adoue, V; Binet, B; Malbec, A; Fourquet, J; Romagnoli, P; van Meerwijk, J P M; Amigorena, S; Joffre, O P The Histone Methyltransferase SETDB1 Controls T Helper Cell Lineage Integrity by Repressing Endogenous Retroviruses. Article de journal Dans: Immunity, vol. 50, p. 629–644, 2019. @article{Adoue2019,Upon activation, naive CD4+ T cells differentiate into distinct T cell subsets via processes reliant on epigenetically regulated, lineage-specific developmental programs. Here, we examined the function of the histone methyltransferase SETDB1 in T helper (Th) cell differentiation. Setdb1-/- naive CD4+ T cells exhibited exacerbated Th1 priming, and when exposed to a Th1-instructive signal, Setdb1-/- Th2 cells crossed lineage boundaries and acquired a Th1 phenotype. SETDB1 did not directly control Th1 gene promoter activity but relied instead on deposition of the repressive H3K9me3 mark at a restricted and cell-type-specific set of endogenous retroviruses (ERVs) located in the vicinity of genes involved in immune processes. Refined bioinformatic analyses suggest that these retrotransposons regulate Th1 gene cis-regulatory elements or act as Th1 gene enhancers. Thus, H3K9me3 deposition by SETDB1 ensures Th cell lineage integrity by repressing a repertoire of ERVs that have been exapted into cis-regulatory modules to shape and control the Th1 gene network. |
Piliponsky, A. M.; Shubin, N. J.; Lahiri, A. K.; Truong, P.; Clauson, M.; Niino, K.; Tsuha, A. L.; Nedospasov, S. A.; Karasuyama, H.; Reber, L. L.; Tsai, M.; Mukai, K.; Galli, S. J. Basophil-derived tumor necrosis factor can enhance survival in a sepsis model in mice Article de journal Dans: Nat Immunol, vol. 20, no. 2, p. 129-140, 2019, ISSN: 1529-2916 (Electronic) 1529-2908 (Linking). @article{RN1b, |
2018 |
Rosa, N.; Triffaux, E.; Robert, V.; Mars, M.; Klein, M.; Bouchaud, G.; Canivet, A.; Magnan, A.; Guery, J. C.; Pelletier, L.; Savignac, M. The beta and alpha2delta auxiliary subunits of voltage-gated calcium channel 1 (Cav1) are required for TH2 lymphocyte function and acute allergic airway inflammation Article de journal Dans: J Allergy Clin Immunol, vol. 142, no. 3, p. 892-903, 2018, ISSN: 1097-6825 (Electronic) 0091-6749 (Linking). @article{RN24, |
Souyris, M.; Cenac, C.; Azar, P.; Daviaud, D.; Canivet, A.; Grunenwald, S.; Pienkowski, C.; Chaumeil, J.; Mejia, J. E.; Guery, J. C. TLR7 escapes X chromosome inactivation in immune cells Article de journal Dans: Sci Immunol, vol. 3, no. 19, 2018, ISSN: 2470-9468 (Electronic) 2470-9468 (Linking), (In the top 5% of all research outputs scored by Altmetric. http://www.altmetric.com/details/32261033). @article{RN25b, |
Colin, P.; Zhou, Z.; Staropoli, I.; Garcia-Perez, J.; Gasser, R.; Armani-Tourret, M.; Benureau, Y.; Gonzalez, N.; Jin, J.; Connell, B. J.; Raymond, S.; Delobel, P.; Izopet, J.; Lortat-Jacob, H.; Alcami, J.; Arenzana-Seisdedos, F.; Brelot, A.; Lagane, B. CCR5 structural plasticity shapes HIV-1 phenotypic properties Article de journal Dans: PLoS Pathog, vol. 14, no. 12, p. e1007432, 2018, ISSN: 1553-7374 (Electronic) 1553-7366 (Linking). @article{RN859, |
Gaud, G.; Lesourne, R.; Love, P. E. Regulatory mechanisms in T cell receptor signalling Article de journal Dans: Nat Rev Immunol, 2018, ISSN: 1474-1741 (Electronic) 1474-1733 (Linking). @article{RN1b, |
Houmadi, R.; Guipouy, D.; Rey-Barroso, J.; Vasconcelos, Z.; Cornet, J.; Manghi, M.; Destainville, N.; Valitutti, S.; Allart, S.; Dupre, L. The Wiskott-Aldrich Syndrome Protein Contributes to the Assembly of the LFA-1 Nanocluster Belt at the Lytic Synapse Article de journal Dans: Cell Rep, vol. 22, no. 4, p. 979-991, 2018, ISSN: 2211-1247 (Electronic). @article{RN3b, |
Eissmann, M. F.; Dijkstra, C.; Wouters, M. A.; Baloyan, D.; Mouradov, D.; Nguyen, P. M.; Davalos-Salas, M.; Putoczki, T. L.; Sieber, O. M.; Mariadason, J. M.; Ernst, M.; Masson, F. Interleukin 33 Signaling Restrains Sporadic Colon Cancer in an Interferon-gamma-Dependent Manner Article de journal Dans: Cancer Immunol Res, vol. 6, no. 4, p. 409-421, 2018, ISSN: 2326-6074 (Electronic) 2326-6066 (Linking). @article{RN1b, |
2017 |
Asrir, A.; Aloulou, M.; Gador, M.; Perals, C.; Fazilleau, N. Interconnected subsets of memory follicular helper T cells have different effector functions Article de journal Dans: Nat Commun, vol. 8, no. 1, p. 847, 2017, ISSN: 2041-1723 (Electronic) 2041-1723 (Linking). @article{RN2b, |
Duguet, F.; Locard-Paulet, M.; Marcellin, M.; Chaoui, K.; Bernard, I.; Andreoletti, O.; Lesourne, R.; Burlet-Schiltz, O.; Gonzalez de Peredo, A.; Saoudi, A. Proteomic Analysis of Regulatory T Cells Reveals the Importance of Themis1 in the Control of Their Suppressive Function Article de journal Dans: Mol Cell Proteomics, vol. 16, no. 8, p. 1416-1432, 2017, ISSN: 1535-9484 (Electronic) 1535-9476 (Linking). @article{RN4b, |
Laffont, Sophie; Blanquart, Eve; Savignac, Magali; Cenac, Claire; Laverny, Gilles; Metzger, Daniel; Girard, Jean-Philippe; Belz, Gabrielle T; Pelletier, Lucette; Seillet, Cyril; Guery, Jean-Charles Androgen signaling negatively controls group 2 innate lymphoid cells Article de journal Dans: J Exp Med, vol. 214, no. 6, p. 1581-1592, 2017, ISSN: 1540-9538 (Electronic) 0022-1007 (Linking). @article{RN3, |
Yshii, L. M.; Hohlfeld, R.; Liblau, R. S. Inflammatory CNS disease caused by immune checkpoint inhibitors: status and perspectives Article de journal Dans: Nat Rev Neurol, vol. 13, no. 12, p. 755-763, 2017, ISSN: 1759-4766 (Electronic) 1759-4758 (Linking). @article{RN5b, |
Joulia, R.; Mailhol, C.; Valitutti, S.; Didier, A.; Espinosa, E. Direct monitoring of basophil degranulation by using avidin-based probes Article de journal Dans: J Allergy Clin Immunol, 2017, ISSN: 1097-6825 (Electronic) 0091-6749 (Linking). @article{RN16, |
Tauber, Maïthé; Boulanouar, Kader; Diene, Gwenaelle; Çabal-Berthoumieu, Sophie; Ehlinger, Virginie; Fichaux-Bourin, Pascale; Molinas, Catherine; Faye, Sandy; Valette, Marion; Pourrinet, Jeanne; Cessans, Catie; Viaux-Sauvelon, Sylvie; Bascoul, Céline; Guedeney, Antoine; Delhanty, Patric; Geenen, Vincent; Martens, Henri; Muscatelli, Françoise; Cohen, David; Consoli, Angèle; Payoux, Pierre; Arnaud, Catherine; Salles, Jean-Pierre The Use of Oxytocin to Improve Feeding and Social Skills in Infants With Prader–Willi Syndrome Article de journal Dans: PEDIATRICS, vol. 139, no. 2, p. e2 0162976, 2017. @article{RN10b, |