2,487 results match your criteria: "Imagine institute[Affiliation]"

A sensitive assay for measuring whole-blood responses to type I IFNs.

Proc Natl Acad Sci U S A

October 2024

Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris 75015, France.

Article Synopsis
  • Inborn errors or autoantibodies (auto-Abs) against type I interferons (IFNs) can lead to severe viral infections.
  • Researchers developed a straightforward blood test that can identify these conditions by stimulating blood with glycosylated IFN-α2, -β, or -ω and measuring IP-10 levels.
  • The study found that IP-10 levels in patients with inherited deficiencies only increase with type II IFN (IFN-γ), while those with auto-Abs can still respond to non-neutralized type I IFNs.
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European Society for Immunodeficiencies guidelines for the management of patients with congenital athymia.

J Allergy Clin Immunol

December 2024

Department of Immunology and Gene Therapy, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom; Infection Immunity and Inflammation Research and Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom.

Article Synopsis
  • Congenital athymia is a serious condition that affects the immune system and makes babies very sick because their thymus (an important organ for immunity) doesn't work properly.
  • Babies with this condition are very vulnerable to infections and sometimes have other health issues.
  • The best treatment is a special surgery called thymus transplantation, and catching this condition early helps kids stay healthier.
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IgG-immunoadsorptions and eculizumab combination in STEC-hemolytic and uremic syndrome pediatric patients with neurological involvement.

Pediatr Nephrol

February 2025

Pediatric Nephrology, Dialysis and Transplantation Department, Robert Debré University Hospital, APHP, Paris Cité University, Paris, France.

Article Synopsis
  • * A retrospective study analyzed 42 pediatric patients treated with either IgIA + ECZ or ECZ alone, alongside a historical cohort receiving supportive care, with focus on survival and neurological outcomes after one year.
  • * Results showed no significant survival difference between treatment groups; however, combining IgIA and ECZ did not demonstrate overall benefits for neurological outcomes, suggesting that this combination may only
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Germline mutations in a G protein identify signaling cross-talk in T cells.

Science

September 2024

Human Immunological Diseases Section, Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research (DIR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.

Article Synopsis
  • Researchers studied mutations in a gene that affects a key protein involved in cell signaling, which is linked to severe health issues like impaired immunity in patients.
  • The mutations were found to disrupt normal cell behavior by promoting excessive cell growth and responses to immune signals, specifically T cell receptor stimulation.
  • The mutant protein was shown to interfere with a regulatory protein, leading to heightened activity of important signaling pathways that contribute to cell growth and survival.
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Loss of tolerance to dietary proteins: From mouse models to human model diseases.

Immunol Rev

September 2024

Laboratory of Intestinal Immunity, INSERM UMR 1163 and Imagine Institute, Université Paris Cité, Paris, France.

The critical importance of the immunoregulatory mechanisms, which prevent adverse responses to dietary proteins is demonstrated by the consequences of their failure in two common but distinct human pathological conditions, food allergy and celiac disease. The mechanisms of tolerance to dietary proteins have been extensively studied in mouse models but the extent to which the results in mice can be extrapolated to humans remains unclear. Here, after summarizing the mechanisms known to control oral tolerance in mouse models, we discuss how the monogenic immune disorders associated with food allergy on the one hand, and celiac disease, on the other hand, represent model diseases to gain insight into the key immunoregulatory pathways that control immune responses to food antigens in humans.

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Congenital microcoria deletion in mouse links Sox21 dysregulation to disease and suggests a role for TGFB2 in glaucoma and myopia.

Am J Hum Genet

October 2024

Laboratory of Genetics in Ophthalmology (LGO), INSERM UMR1163, Institute of Genetic Diseases, Imagine and Université Paris Cité, Paris, France. Electronic address:

Article Synopsis
  • Congenital microcoria (MCOR) is a rare genetic condition linked to issues like severe nearsightedness and glaucoma, caused by changes in a specific chromosome region.
  • Researchers developed a 3D model of chromosome 13q32.1, showing how deletions disrupt important genetic boundaries, leading to altered gene expression that affects iris development.
  • The study also identified a connection between SOX21 and the TGFB2 gene, highlighting their roles in eye development and conditions like glaucoma and myopia, which impact a large population.
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Erythrocyte membrane protein band 4.1 like 3 (EPB41L3: NM_012307.5), also known as DAL1, encodes the ubiquitously expressed, neuronally enriched 4.

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Article Synopsis
  • The human immune system continues to develop for several years after birth, affecting how young children respond to infections, such as SARS-CoV-2.
  • Researchers studied T cell responses in children and adults before, during, and after SARS-CoV-2 infection, revealing that younger children (under 5) had a weaker CD4 T cell response compared to older children and adults with mild disease.
  • Following infection, preschool-age children produced similar neutralizing antibodies to adults but had different T cell characteristics and fewer memory B cells, indicating a gradual maturation of their adaptive immune responses.
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Article Synopsis
  • Advanced systemic mastocytosis (AdvSM) is a complex condition linked to poor outcomes, and while midostaurin is the first approved treatment, its long-lasting effectiveness is limited.
  • Various prognostic scoring systems like MARS, IPSM, and GPSM have been developed to assess patients' outcomes, but it's essential to tailor these scores to specific AdvSM subtypes for better accuracy.
  • A study of patients treated with midostaurin revealed that MARS and AdvSM subtype significantly predict overall survival, identifying five distinct patient subgroups with varying median survival times, highlighting the need for personalized management strategies.
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Recent studies highlighted genetic aberrations associated with prognosis in Mantle Cell lymphoma (MCL), yet comprehensive testing is not implemented in clinical routine. We conducted a comprehensive genomic characterization of 180 patients from the European MCL network trials by targeted sequencing of peripheral blood DNA using the EuroClonality(EC)-NDC assay. The IGH::CCND1 fusion was identified in 94% of patients, clonal IGH-V-(D)-J rearrangements in all, and 79% had ≥1 somatic gene mutation.

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Biological functions of extracellular vesicles from mammalian cells.

Biomed J

October 2024

Department of Biomedical Sciences, Arthur Dugoni School of Dentistry, University of the Pacific, San Francisco, USA. Electronic address:

Extracellular vesicles (EVs) are enclosed by a phospholipid bilayer and can be secreted by most types of cells. EVs deliver cargo from the secreting cell into the cytoplasm of recipient cells, influencing the function of the recipient cells. EVs are attracting increasing attention from a broad range of clinicians and scientists due to their ability to promote or inhibit various physiological pathways or pathological conditions.

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While selenium is a cofactor of several antioxidant enzymes against cancer and is essential for human health, its excess intake may also be harmful. Though a safe intake of selenium has recently been recommended, it is not well understood in the Asian population. We aimed to determine the association between dietary intake of selenium and cancer risk in a case-control study of 3758 incident cancer cases (i.

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Article Synopsis
  • Diamond-Blackfan Anemia Syndrome (DBS) is a rare condition marked by bone marrow failure and various congenital anomalies, with RPL26 emerging as a key gene associated with it.
  • The study involved patients with RPL26 variants, examining blood cell development and RPL26 expression in a patient’s cells.
  • Findings indicated that RPL26 is linked to multiple congenital issues, especially radial ray anomalies, and bone marrow failure is not always present in DBS, broadening the understanding of the condition’s spectrum.
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Layer 5 extratelencephalic (ET) neurons are present across neocortical areas and send axons to multiple subcortical targets. Two cardinal subtypes exist: (1) Slco2a1-expressing neurons (ET), which predominate in the motor cortex and project distally to the pons, medulla and spinal cord; and (2) Nprs1- or Hpgd-expressing neurons (ET), which predominate in the visual cortex and project more proximally to the pons and thalamus. An understanding of how area-specific ET and ET emerge during development is important because they are critical for fine motor skills and are susceptible to spinal cord injury and amyotrophic lateral sclerosis.

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Sickle cell disease (SCD) is a hereditary blood disorder characterized by the presence of abnormal hemoglobin molecules and thus distortion (sickling) of the red blood cells. SCD causes chronic pain and organ damage and shortens life expectancy. Gene therapy emerges as a potentially curative approach for people with SCD who lack a matched sibling donor for hematopoietic stem cell transplantation.

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Inborn errors of immunity and invasive fungal infections: presentation and management.

Curr Opin Infect Dis

December 2024

Université Paris Cité, Department of Infectious Diseases and Tropical Medicine, Necker - Enfants Malades University Hospital, Assistance Publique - Hôpitaux de Paris (AP-HP), IHU Imagine, Paris, France.

Article Synopsis
  • This review focuses on how inborn errors of immunity affect the clinical presentation and management of invasive fungal infections.
  • It highlights that patients with chronic granulomatous disease and STAT3 deficiency are particularly vulnerable to aspergillosis and should receive mold-active antifungal prophylaxis.
  • Overall, managing invasive fungal infections in patients with inborn errors of immunity is complex and often requires long-term antifungal treatments and potential consideration for hematopoietic stem cell transplantation.
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Introduction: Osteogenesis imperfecta (OI) is a heritable skeletal disorder and comprises various subtypes that differ in clinical presentation, with Type I considered the least severe and Types III/IV the most severe forms. The study aim was to understand the OI patient diagnostic and treatment journey across Europe.

Methods: We conducted a qualitative, descriptive study to understand the OI patient journey.

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[Preventing relapse of acute leukemias and myelodysplastic syndromes in post-allograft transplantation: Prophylactic and preemptive strategies (SFGM-TC)].

Bull Cancer

January 2025

CHU de Lille, institut de pharmacie, 59000 Lille, France; Université Lille, ULR 7365, GRITA - groupe de recherche sur les formes injectables et les technologies associées, 59000 Lille, France.

Disease relapse remains the first cause of mortality of hematological malignancies after allogeneic hematopoietic stem cell transplantation (allo-HCT) for acute myeloid and lymphoid leukemia (AML and ALL) and for myelodysplastic syndroms (MDS). More and more patients are eligible for allo-HCT over the years and for many of them, only reduced intensity conditioning is possible, which is associated with a higher risk of relapse. Knowledge and biotechnology allow us to better identify diseases at very high risk of relapse and to measure residual disease before allo-HCT.

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MYSM1 deficiency causes inherited bone marrow failure syndrome (IBMFS). We have previously identified an IBMFS patient with a homozygous pathogenic variant in MYSM1 who recovered from cytopenia due to spontaneous correction of one MYSM1 variant in the haematopoietic compartment, an event called somatic genetic rescue (SGR). The study of the genetic and biological aspects of the patient's haematopoietic/lymphopoietic system over a decade after SGR shows that one genetically corrected haematopoietic stem cell (HSC) can restore a healthy and stable haematopoietic system.

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Heterozygous variant as a novel genetic cause of telomere biology disorders.

Genes Dev

September 2024

UMR7258 Centre National de la Recherche Scientifique (CNRS), UMR1068 Institut National de la Santé et de la Recherche Médicale (INSERM), UM105 Aix Marseille University, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille (CRCM), Laboratoire Labellisée par la Ligue Nationale Contre le Cancer, F-13009 Marseille, France;

Premature telomere shortening or telomere instability is associated with a group of rare and heterogeneous diseases collectively known as telomere biology disorders (TBDs). Here we identified two unrelated individuals with clinical manifestations of TBDs and short telomeres associated with the identical monoallelic variant c.767A>G; Y256C in Although the replication protein A2 (RPA2) mutant did not affect ssDNA binding and G-quadruplex-unfolding properties of RPA, the mutation reduced the affinity of RPA2 with the ubiquitin ligase RFWD3 and reduced RPA ubiquitination.

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Inherited human RelB deficiency impairs innate and adaptive immunity to infection.

Proc Natl Acad Sci U S A

September 2024

Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM UMR 1163, Paris 75015, France.

Article Synopsis
  • Two unrelated adults were found to have genetic mutations causing a deficiency in a protein called RelB, leading to impaired immune responses.
  • This deficiency affects their ability to produce certain immune cells and antibodies, resulting in low levels of important T and B cells and impaired immune function.
  • As a result, the patients have an increased risk of infections due to their weakened immune system, and they produce harmful autoantibodies against type I interferons even after receiving stem cell transplants.
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