1
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Kalkat A, Humpel O, Hostoffer R. Novel BTK Mutation in Patient with Late Diagnosis of X-Linked Agammaglobulinemia. Case Reports Immunol 2023; 2023:6698913. [PMID: 38046560 PMCID: PMC10693464 DOI: 10.1155/2023/6698913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/12/2023] [Accepted: 10/31/2023] [Indexed: 12/05/2023] Open
Abstract
X-linked agammaglobulinemia (XLA) is a genetic disorder with mutation in Bruton's tyrosine kinase (BTK). Defects in B cell development and immunoglobulin production lead to recurrent infections following loss of maternal IgG at 6 months of age. A 55-year-old male with a longstanding common variable immunodeficiency diagnosis on infusion therapy presented to the clinic with cutaneous T-cell lymphoma, which inspired overall repeat evaluation. Immunoglobulin levels and lymphocyte markers, family history, and genetic testing prompted a true diagnosis of XLA and novel mutation in the BTK gene. Disease-associated mutations have been noted in all five domains of BTK, with missense variants most commonly cited among the 100s of reported genetic alterations. The BTK protein is expressed in hematopoietic lineages and plasma cells, with the exception of T lymphocytes. Disruption in the protein function or absence of BTK halts normal B cell development at the pre-B transitional cell stage and induces premature apoptosis. We present the first reported case of a novel hemizygous BTK c.1492C > G mutation in a patient causing XLA.
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Affiliation(s)
- Amanpreet Kalkat
- University Hospitals of Cleveland, 5915 Landerbrook Dr, Mayfield Heights, OH 44124, USA
| | - Olivia Humpel
- Lake Erie College of Osteopathic Medicine, 5000 Lakewood Ranch Boulevard, Bradenton, FL 34211, USA
| | - Robert Hostoffer
- University Hospitals of Cleveland, 5915 Landerbrook Dr, Mayfield Heights, OH 44124, USA
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2
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Srinivasan C, Shameli A, Ritchie B, Adatia A. Investigation of a synonymous mutation in Btk in a patient with agammaglobulinemia: A case report. Immun Inflamm Dis 2023; 11:e1049. [PMID: 37904676 PMCID: PMC10587732 DOI: 10.1002/iid3.1049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 09/24/2023] [Accepted: 09/28/2023] [Indexed: 11/01/2023] Open
Abstract
BACKGROUND X-linked agammaglobulinemia (XLA) is the most common form of agammaglobulinemia and is caused by mutations in Btk, which encodes Bruton tyrosine kinase (BTK). CASE DESCRIPTION We describe a 36-year-old male who presented as an infant with hypogammaglobulinemia and sinopulmonary infections and was initially diagnosed with common variable immunodeficiency. Genetic testing showed he was hemizygous for Btk c.240G > A. This synonymous variant affecting the last nucleotide of exon 3 leads to aberrant splicing of most but not all mRNA transcripts. CONCLUSION We demonstrated reduced BTK protein expression confirming the pathogenicity of the variant and related our findings to genotype-phenotype relationship studies ina XLA caused by synonymous mutations.
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Affiliation(s)
- Cindy Srinivasan
- Student, Department of MedicineUniversity of AlbertaEdmontonAlbertaCanada
| | - Afshin Shameli
- Alberta Precision Laboratories, Calgary, Alberta, and Department of Laboratory Medicine and PathologyUniversity of WashingtonSeattleWashingtonUSA
| | - Bruce Ritchie
- Division of HematologyUniversity of AlbertaEdmontonAlbertaCanada
| | - Adil Adatia
- Department of Medicine, Division of Pulmonary MedicineUniversity of AlbertaEdmontonAlbertaCanada
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3
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Chear CT, Ismail IH, Chan KC, Noh LM, Kassim A, Latiff AHA, Gill SS, Ramly NH, Tan KK, Sundaraj C, Choo CM, Mohamed SAS, Baharin MF, Zamri AS, Yahya SNHS, Mohamad SB, Ripen AM. Clinical features and mutational analysis of X-linked agammaglobulinemia patients in Malaysia. Front Immunol 2023; 14:1252765. [PMID: 37809070 PMCID: PMC10560089 DOI: 10.3389/fimmu.2023.1252765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 09/05/2023] [Indexed: 10/10/2023] Open
Abstract
Background Bruton's tyrosine kinase (BTK) is a cytoplasmic protein involved in the B cell development. X-linked agammaglobulinemia (XLA) is caused by mutation in the BTK gene, which results in very low or absent B cells. Affected males have markedly reduced immunoglobulin levels, which render them susceptible to recurrent and severe bacterial infections. Methods: Patients suspected with X-linked agammaglobulinemia were enrolled during the period of 2010-2018. Clinical summary, and immunological profiles of these patients were recorded. Peripheral blood samples were collected for monocyte BTK protein expression detection and BTK genetic analysis. The medical records between January 2020 and June 2023 were reviewed to investigate COVID-19 in XLA. Results Twenty-two patients (from 16 unrelated families) were molecularly diagnosed as XLA. Genetic testing revealed fifteen distinct mutations, including four splicing mutations, four missense mutations, three nonsense mutations, three short deletions, and one large indel mutation. These mutations scattered throughout the BTK gene and mostly affected the kinase domain. All mutations including five novel mutations were predicted to be pathogenic or deleterious by in silico prediction tools. Genetic testing confirmed that eleven mothers and seven sisters were carriers for the disease, while three mutations were de novo. Flow cytometric analysis showed that thirteen patients had minimal BTK expression (0-15%) while eight patients had reduced BTK expression (16-64%). One patient was not tested for monocyte BTK expression due to insufficient sample. Pneumonia (n=13) was the most common manifestation, while Pseudomonas aeruginosa was the most frequently isolated pathogen from the patients (n=4). Mild or asymptomatic COVID-19 was reported in four patients. Conclusion This report provides the first overview of demographic, clinical, immunological and genetic data of XLA in Malaysia. The combination of flow cytometric assessment and BTK genetic analysis provides a definitive diagnosis for XLA patients, especially with atypical clinical presentation. In addition, it may also allow carrier detection and assist in genetic counselling and prenatal diagnosis.
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Affiliation(s)
- Chai Teng Chear
- Primary Immunodeficiency Unit, Allergy and Immunology Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Selangor, Malaysia
| | - Intan Hakimah Ismail
- Clinical Immunology Unit, Department of Paediatrics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Kwai Cheng Chan
- Pediatric Department, Penang General Hospital, Ministry of Health, George Town, Penang, Malaysia
| | - Lokman Mohd Noh
- Pediatric Department, Tunku Azizah Hospital (Women and Children Hospital Kuala Lumpur), Ministry of Health, Kuala Lumpur, Malaysia
| | - Asiah Kassim
- Pediatric Department, Tunku Azizah Hospital (Women and Children Hospital Kuala Lumpur), Ministry of Health, Kuala Lumpur, Malaysia
| | | | - Sandeep Singh Gill
- Pediatric Department, Hospital Wanita Dan Kanak-Kanak Sabah, Ministry of Health, Kota Kinabalu, Sabah, Malaysia
| | - Nazatul Haslina Ramly
- Pediatric Department, Tunku Azizah Hospital (Women and Children Hospital Kuala Lumpur), Ministry of Health, Kuala Lumpur, Malaysia
| | - Kah Kee Tan
- Pediatric Department, Perdana University and Royal College of Surgeons in Ireland (PURCSI), School of Medicine, Perdana University, Kuala Lumpur, Malaysia
| | - Charlotte Sundaraj
- Pediatric Department, Hospital Putrajaya, Ministry of Health, Putrajaya, Malaysia
| | - Chong Ming Choo
- Pediatric Department, Hospital Sultan Abdul Halim, Ministry of Health, Sungai Petani, Kedah, Malaysia
| | | | - Mohd Farid Baharin
- Primary Immunodeficiency Unit, Allergy and Immunology Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Selangor, Malaysia
| | - Amelia Suhana Zamri
- Primary Immunodeficiency Unit, Allergy and Immunology Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Selangor, Malaysia
| | - Sharifah Nurul Husna Syed Yahya
- Primary Immunodeficiency Unit, Allergy and Immunology Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Selangor, Malaysia
| | - Saharuddin Bin Mohamad
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
- Centre of Research in Systems Biology, Structural Bioinformatics and Human Digital Imaging (CRYSTAL), Universiti Malaya, Kuala Lumpur, Malaysia
| | - Adiratna Mat Ripen
- Primary Immunodeficiency Unit, Allergy and Immunology Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Selangor, Malaysia
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4
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Illig D, Kotlarz D. Dysregulated inflammasome activity in intestinal inflammation - Insights from patients with very early onset IBD. Front Immunol 2022; 13:1027289. [PMID: 36524121 PMCID: PMC9744759 DOI: 10.3389/fimmu.2022.1027289] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/11/2022] [Indexed: 11/30/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a multifactorial disorder triggered by imbalances of the microbiome and immune dysregulations in genetically susceptible individuals. Several mouse and human studies have demonstrated that multimeric inflammasomes are critical regulators of host defense and gut homeostasis by modulating immune responses to pathogen- or damage-associated molecular patterns. In the context of IBD, excessive production of pro-inflammatory Interleukin-1β has been detected in patient-derived intestinal tissues and correlated with the disease severity or failure to respond to anti-tumor necrosis factor therapy. Correspondingly, genome-wide association studies have suggested that single nucleotide polymorphisms in inflammasome components might be associated with risk of IBD development. The relevance of inflammasomes in controlling human intestinal homeostasis has been further exemplified by the discovery of very early onset IBD (VEO-IBD) patients with monogenic defects affecting different molecules in the complex regulatory network of inflammasome activity. This review provides an overview of known causative monogenic entities of VEO-IBD associated with altered inflammasome activity. A better understanding of the molecular mechanisms controlling inflammasomes in monogenic VEO-IBD may open novel therapeutic avenues for rare and common inflammatory diseases.
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Affiliation(s)
- David Illig
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Daniel Kotlarz
- Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany,Institute of Translational Genomics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany,*Correspondence: Daniel Kotlarz,
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5
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Schejbel L, Breinholt MF, Gang AO, Nielsen TH, Pedersen LM, Høgdall E, Nørgaard P. Inactivating
BTK
mutations in large B‐cell lymphoma in a real‐world cohort: Strong correlation with
BCL2
translocation. EJHAEM 2022; 3:936-939. [PMID: 36051027 PMCID: PMC9421985 DOI: 10.1002/jha2.489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 11/10/2022]
Abstract
Inactivating mutations in Bruton's tyrosine kinase (BTK) in patients with follicular lymphoma (FL) have recently been reported. These mutations were found in BTK inhibitor‐treatment naïve patients. Here, we report the BTK mutation status in a real‐world cohort of patients with non‐Hodgkin lymphoma. We found primary BTK mutations in 7.7% of patients with large B‐cell lymphoma (LBCL) and in 14.1% of patients with FL. All patients with BTK‐mutated LBCL were BCL2 translocation positive, and the correlation between BCL2 translocation and BTK mutation persisted even when patients with known transformation from FL were excluded.
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Affiliation(s)
- Lone Schejbel
- Department of Pathology Copenhagen University Hospital Herlev Denmark
| | | | - Anne Ortved Gang
- Department of Haematology Copenhagen University Hospital Rigshospitalet Denmark
| | | | | | - Estrid Høgdall
- Department of Pathology Copenhagen University Hospital Herlev Denmark
| | - Peter Nørgaard
- Department of Pathology Copenhagen University Hospital Herlev Denmark
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6
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O'Toole D, Groth D, Wright H, Bonilla FA, Fuleihan RL, Cunningham-Rundles C, Sullivan KE, Ochs HD, Marsh R, Feuille E. X-Linked Agammaglobulinemia: Infection Frequency and Infection-Related Mortality in the USIDNET Registry. J Clin Immunol 2022; 42:827-836. [PMID: 35288819 PMCID: PMC8920804 DOI: 10.1007/s10875-022-01237-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 02/18/2022] [Indexed: 11/16/2022]
Abstract
X-linked agammaglobulinemia (XLA) is a primary immunodeficiency disorder caused by mutations in the Bruton tyrosine kinase (BTK) gene leading to B lymphocyte deficiency and susceptibility to infection. A potential benefit of earlier diagnosis and treatment initiation on morbidity and mortality in XLA is incompletely understood. In the USIDNET Registry, we describe infection frequency and infection-related mortality in patients with XLA and their relationship to age of diagnosis and treatment initiation. Among the 231 XLA patients enrolled in the Registry, respiratory infections (N = 203, 88%) were the most commonly reported. Among those deceased (N = 20) where cause of death was known (N = 17), mortality was attributed to infection in most (N = 12, 71%). Chronic lung disease, often a consequence of repeated lower respiratory tract infection (LRTI), was also a frequent complication associated with mortality (N = 9, 53%). Age of diagnosis in years was lower for those without LRTI compared to those with (median 1.5 [IQR 0.5–3.3] vs. median 3.0 [IQR 1.0–5.0], p = 0.0026) and among living patients compared to deceased (median 1.8 [IQR 0.5–5.0] vs. median 2.7 [IQR 1.6–6.0], p = 0.04). Age at treatment initiation in years was lower among those without LRTIs compared to those with (median 1.0 [IQR 0.4–2.4] vs. median 2.8 [IQR 1.0–5.4], p = 0.0006). For every year increase in age at start of therapy, the odds of experiencing a LRTI was 1.216 (OR 1.216, 95% CI 1.048–1.411, p = 0.01). Given the expected finding of reduced LRTIs and mortality among those with earlier age at diagnosis, our study findings support inclusion of XLA in newborn screening programs.
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Affiliation(s)
- Dana O'Toole
- Department of Pediatrics, Division of Allergy, Immunology, and Rheumatology, Columbia University Irving Medical Center, New York-Presbyterian Morgan Stanley Children's Hospital, 3959 Broadway, New York, NY, 10036, USA.
| | - Daniel Groth
- Department of Pediatrics, University of Washington and Seattle Children's Research Institute, Seattle, WA, USA
| | | | | | - Ramsay L Fuleihan
- Department of Pediatrics, Division of Allergy, Immunology, and Rheumatology, Columbia University Irving Medical Center, New York-Presbyterian Morgan Stanley Children's Hospital, 3959 Broadway, New York, NY, 10036, USA
| | | | | | - Hans D Ochs
- Department of Pediatrics, University of Washington and Seattle Children's Research Institute, Seattle, WA, USA
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7
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Rojas-Restrepo J, Caballero-Oteyza A, Huebscher K, Haberstroh H, Fliegauf M, Keller B, Kobbe R, Warnatz K, Ehl S, Proietti M, Grimbacher B. Establishing the Molecular Diagnoses in a Cohort of 291 Patients With Predominantly Antibody Deficiency by Targeted Next-Generation Sequencing: Experience From a Monocentric Study. Front Immunol 2022; 12:786516. [PMID: 34975878 PMCID: PMC8718408 DOI: 10.3389/fimmu.2021.786516] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/29/2021] [Indexed: 12/12/2022] Open
Abstract
Predominantly antibody deficiencies (PAD) are a heterogeneous group of disorders characterized by dysfunctional antibody production, low immunoglobulin levels in serum and impaired vaccine responses. The clinical picture is variable, ranging from mild symptoms to severe complications, which may include autoimmunity, gastrointestinal disease, allergy, and malignancies. If left untreated, PAD patients are at risk of enduring disease progression, irreversible organ damage, and reduced life expectancy. A timely diagnosis has been shown to significantly improve disease prognosis. Here, we report on our experience using targeted gene panel sequencing by employing Agilent’s HaloPlex or SureSelect and Illumina’s MiSeq technologies in a cohort of 291 individuals who presented with low or absent immunoglobulin levels in combination with or without other clinical features. In total, we have detected over 57 novel or previously reported relevant mutations in ADA, ADA2, BTK, CTLA4, LRBA, NFKB1, NFKB2, PIK3CD, STAT3, and TNFRSF13B. Overall, a genetic diagnosis could be made in 24.7% of the investigated patients. The percentage of coverage for the targeted regions ranged from 90% to 98% in this study. Moreover, functional assays were performed on a defined group of the patients carrying candidate variants in CTLA4, LRBA, NFKB1 and BTK, which confirmed their deleterious effect on protein expression and/or function. This study reiterates that the immunological heterogeneity of predominantly antibody deficiencies may have a diverse genetic origin, although certain clinical features may hint towards a specific group of defects. Employing targeted sequencing panels proves to be a very time- and cost-efficient, yet reliable, method for the establishment of a genetic diagnosis in individuals with PAD. However, in case of negative panel results, or if functional testing reveals inconspicuous observations in patients with a clear indication for genetic testing, further work-up including whole exome or whole genome sequencing should be considered.
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Affiliation(s)
- Jessica Rojas-Restrepo
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Andrés Caballero-Oteyza
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Resolving Infection Susceptibility (RESIST) - Cluster of Excellence 2155 to Hanover Medical School, Satellite Center Freiburg, Freiburg, Germany
| | - Katrin Huebscher
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany
| | - Hanna Haberstroh
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany
| | - Manfred Fliegauf
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Integrative Biological Signaling Studies (CIBSS), University of Freiburg, Freiburg, Germany
| | - Baerbel Keller
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany
| | - Robin Kobbe
- First Department of Medicine, Division of Infectious Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Klaus Warnatz
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany
| | - Stephan Ehl
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany
| | - Michele Proietti
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany.,Department of Rheumatology and Immunology, Hannover Medical University, Hannover, Germany
| | - Bodo Grimbacher
- Institute for Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, University Medical Center Freiburg, Freiburg, Germany.,Resolving Infection Susceptibility (RESIST) - Cluster of Excellence 2155 to Hanover Medical School, Satellite Center Freiburg, Freiburg, Germany.,Center for Integrative Biological Signaling Studies (CIBSS), University of Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany.,German Center for Infection Research (DZIF), Satellite Center Freiburg, Freiburg, Germany
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8
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Byun JY, Koh YT, Jang SY, Witcher JW, Chan JR, Pustilnik A, Daniels MJ, Kim YH, Suh KH, Linnik MD, Lee YM. Target modulation and pharmacokinetics/pharmacodynamics translation of the BTK inhibitor poseltinib for model-informed phase II dose selection. Sci Rep 2021; 11:18671. [PMID: 34548595 PMCID: PMC8455565 DOI: 10.1038/s41598-021-98255-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 09/01/2021] [Indexed: 01/14/2023] Open
Abstract
The selective Bruton tyrosine kinase (BTK) inhibitor poseltinib has been shown to inhibit the BCR signal transduction pathway and cytokine production in B cells (Park et al.Arthritis Res. Ther.18, 91, 10.1186/s13075-016-0988-z, 2016). This study describes the translation of nonclinical research studies to a phase I clinical trial in healthy volunteers in which pharmacokinetics (PKs) and pharmacodynamics (PDs) were evaluated for dose determination. The BTK protein kinase inhibitory effects of poseltinib in human peripheral blood mononuclear cells (PBMCs) and in rats with collagen-induced arthritis (CIA) were evaluated. High-dimensional phosphorylation analysis was conducted on human immune cells such as B cells, CD8 + memory cells, CD4 + memory cells, NK cells, neutrophils, and monocytes, to map the impact of poseltinib on BTK/PLC and AKT signaling pathways. PK and PD profiles were evaluated in a first-in-human study in healthy donors, and a PK/PD model was established based on BTK occupancy. Poseltinib bound to the BTK protein and modulated BTK phosphorylation in human PBMCs. High-dimensional phosphorylation analysis of 94 nodes showed that poseltinib had the highest impact on anti-IgM + CD40L stimulated B cells, however, lower impacts on anti-CD3/CD-28 stimulated T cells, IL-2 stimulated CD4 + T cells and NK cells, M-CSF stimulated monocytes, or LPS-induced granulocytes. In anti-IgM + CD40L stimulated B cells, poseltinib inhibited the phosphorylation of BTK, AKT, and PLCγ2. Moreover, poseltinib dose dependently improved arthritis disease severity in CIA rat model. In a clinical phase I trial for healthy volunteers, poseltinib exhibited dose-dependent and persistent BTK occupancy in PBMCs of all poseltinib-administrated patients in the study. More than 80% of BTK occupancy at 40 mg dosing was maintained for up to 48 h after the first dose. A first-in-human healthy volunteer study of poseltinib established target engagement with circulating BTK protein. Desirable PK and PD properties were observed, and a modeling approach was used for rational dose selection for subsequent trials. Poseltinib was confirmed as a potential BTK inhibitor for the treatment of autoimmune diseases. Trial registration: This article includes the results of a clinical intervention on human participants [NCT01765478].
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Affiliation(s)
- Joo-Yun Byun
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Yi T Koh
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Sun Young Jang
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Jennifer W Witcher
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Jason R Chan
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Anna Pustilnik
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Mark J Daniels
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Young Hoon Kim
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Kwee Hyun Suh
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Matthew D Linnik
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA.
| | - Young-Mi Lee
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea.
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9
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Liu SC, Wu YC, Huang CM, Hsieh MS, Huang TY, Huang CS, Hsu TN, Huang MS, Lee WH, Yeh CT, Lin CS. Inhibition of Bruton's tyrosine kinase as a therapeutic strategy for chemoresistant oral squamous cell carcinoma and potential suppression of cancer stemness. Oncogenesis 2021; 10:20. [PMID: 33640903 PMCID: PMC7914253 DOI: 10.1038/s41389-021-00308-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 02/03/2021] [Accepted: 02/10/2021] [Indexed: 02/07/2023] Open
Abstract
Locally advanced oral squamous cell carcinoma (OSCC) requires multimodal therapy, including surgery and concurrent chemoradiotherapy (CCRT). CCRT-resistant and recurrent cancer has a poor prognosis. We investigated the effects of Bruton's tyrosine kinase (BTK) on CCRT-resistant OSCC tissues. The effect of ibrutinib, a first-in-class BTK inhibitor, was tested on stem cell-like OSCC tumorspheres. A tissue array was constructed using tissue samples from 70 patients with OSCC. Human OSCC cell lines, SAS, TW2.6 and HSC-3, were examined. Wound healing, Matrigel invasion, and tumorsphere formation assays, as well as immunofluorescence analysis and flow cytometry, were used to investigate the effects of BTK knockdown (shBTK), ibrutinib, cisplatin, and ibrutinib/cisplatin combination on OSCC cells. We demonstrated that BTK was aberrantly highly expressed in the clinical CCRT-resistant OSCC tissue array, which resulted in poor overall survival in our local Tri-Service General Hospital and freely accessible TCGA OSCC cohorts. shBTK significantly downregulated the stemness markers Nanog, CD133, T cell immunoglobulin-3 (TIM-3), and Krüppel-like factor 4 (KLF4) in SAS tumorspheres and attenuated OSCC cell migration and colony formation. Ibrutinib reduced the number of aldehyde dehydrogenase (ALDH)-rich OSCC cells and reduced tumorsphere formation, migration, and invasion in a dose-dependent manner. Compared with ibrutinib or cisplatin monotherapy, the ibrutinib/cisplatin combination significantly reduced the formation of ALDH + OSCC tumorspheres and enhanced apoptosis. These results demonstrate that ibrutinib effectively inhibits the CSCs-like phenotype of OSCC cells through dysregulation of BTK/CD133 signaling. The ibrutinib/cisplatin combination may be considered for future clinical use.
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Affiliation(s)
- Shao-Cheng Liu
- grid.260565.20000 0004 0634 0356Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114 Taiwan
| | - Yang-Che Wu
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Dentistry, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Chih-Ming Huang
- grid.413593.90000 0004 0573 007XDepartment of Otolaryngology, Taitung Mackay Memorial Hospital, Taipei City, Taiwan
| | - Ming-Shou Hsieh
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Dentistry, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Ting-Yi Huang
- grid.412955.e0000 0004 0419 7197Department of Hematology and Oncology, Cancer Center, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Medical Research & Education, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Chin-Sheng Huang
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Dentistry, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Tung-Nien Hsu
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Dentistry, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Mao-Suan Huang
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Dentistry, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Wei-Hwa Lee
- grid.412955.e0000 0004 0419 7197Department of Medical Research & Education, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Pathology, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan
| | - Chi-Tai Yeh
- grid.412955.e0000 0004 0419 7197Department of Medical Research & Education, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan ,grid.412955.e0000 0004 0419 7197Department of Pathology, Taipei Medical University—Shuang Ho Hospital, New Taipei City, 235 Taiwan ,grid.413051.20000 0004 0444 7352Department of Medical Laboratory Science and Biotechnology, Yuanpei University of Medical Technology, Hsinchu City, 30015 Taiwan
| | - Chun-Shu Lin
- Department of Radiation Oncology, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114 Taiwan
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10
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Della Mina E, Guérin A, Tangye SG. Molecular requirements for human lymphopoiesis as defined by inborn errors of immunity. Stem Cells 2021; 39:389-402. [PMID: 33400834 DOI: 10.1002/stem.3327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 12/07/2020] [Indexed: 12/19/2022]
Abstract
Hematopoietic stem cells (HSCs) are the progenitor cells that give rise to the diverse repertoire of all immune cells. As they differentiate, HSCs yield a series of cell states that undergo gradual commitment to become mature blood cells. Studies of hematopoiesis in murine models have provided critical insights about the lineage relationships among stem cells, progenitors, and mature cells, and these have guided investigations of the molecular basis for these distinct developmental stages. Primary immune deficiencies are caused by inborn errors of immunity that result in immune dysfunction and subsequent susceptibility to severe and recurrent infection(s). Over the last decade there has been a dramatic increase in the number and depth of the molecular, cellular, and clinical characterization of such genetically defined causes of immune dysfunction. Patients harboring inborn errors of immunity thus represent a unique resource to improve our understanding of the multilayered and complex mechanisms underlying lymphocyte development in humans. These breakthrough discoveries not only enable significant advances in the diagnosis of such rare and complex conditions but also provide substantial improvement in the development of personalized treatments. Here, we will discuss the clinical, cellular, and molecular phenotypes, and treatments of selected inborn errors of immunity that impede, either intrinsically or extrinsically, the development of B- or T-cells at different stages.
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Affiliation(s)
- Erika Della Mina
- Immunology and Immunodeficiency Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales, Darlinghurst, New South Wales, Australia
| | - Antoine Guérin
- Immunology and Immunodeficiency Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales, Darlinghurst, New South Wales, Australia
| | - Stuart G Tangye
- Immunology and Immunodeficiency Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales, Darlinghurst, New South Wales, Australia
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11
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Lanlokun M, Borden A, Nieves D, Walter JE, Albright D. X-Linked Agammaglobulinemia Presenting as Neutropenia: Case Report and an Overview of Literature. Front Pediatr 2021; 9:633692. [PMID: 34262886 PMCID: PMC8273273 DOI: 10.3389/fped.2021.633692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 06/01/2021] [Indexed: 11/22/2022] Open
Abstract
X-linked agammaglobulinemia (XLA) is an inherited immunodeficiency caused by mutations in the Bruton Tyrosine Kinase (BTK) gene. Marked neutropenia can be the initial abnormal laboratory finding in patients with XLA who are presenting with their first illness. The two cases presented herein support early consideration of evaluation for primary humoral immune deficiency in previously healthy male patients under the age of 12 months who present with neutropenia in the setting of infection shortly after passively acquired maternal antibody has sufficiently waned. Initial consideration of XLA (or other humoral immune deficiencies) in this particular population of young male neutropenic patients may afford the opportunity to avoid bone marrow biopsy in otherwise stable cases with similar presentations.
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Affiliation(s)
- Mosopefoluwa Lanlokun
- Division of Allergy and Immunology, University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Pittsburgh, PA, United States
| | - Amanda Borden
- Department of Medicine, Johns Hopkins All Children's Hospital, St. Petersburg, FL, United States
| | - Daime Nieves
- Division of Pediatric Allergy/Immunology, University of South Florida, St. Petersburg, FL, United States
| | - Jolan E Walter
- Department of Medicine, Johns Hopkins All Children's Hospital, St. Petersburg, FL, United States.,Division of Pediatric Allergy/Immunology, University of South Florida, St. Petersburg, FL, United States.,Division of Pediatric Allergy and Immunology, Massachusetts General Hospital for Children, Boston, MA, United States
| | - Deborah Albright
- Division of Allergy and Immunology, University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Pittsburgh, PA, United States
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12
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Primary Immunodeficiencies in India: Molecular Diagnosis and the Role of Next-Generation Sequencing. J Clin Immunol 2020; 41:393-413. [PMID: 33225392 DOI: 10.1007/s10875-020-00923-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 11/13/2020] [Indexed: 10/22/2022]
Abstract
Primary immunodeficiency diseases (PIDs) are a group of clinically and genetically heterogeneous disorders showing ethnic and geographic diversities. Next-generation sequencing (NGS) is a comprehensive tool to diagnose PID. Although PID is common in India, data on the genetic spectrum of PIDs are limited due to financial restrictions. The study aims to characterize the clinical and genetic spectrum of PID patients in India and highlight the importance of a cost-effective targeted gene panel sequencing approach for PID in a resource-limited setting. The study includes 229 patients with clinical and laboratory features suggestive of PIDs. Mutation analysis was done by Sanger sequencing and NGS targeting a customized panel of genes. Pathogenic variants were identified in 97 patients involving 42 different genes with BTK and IL12RB1 being the most common mutated genes. Autosomal recessive and X-linked recessive inheritance were seen in 51.6% and 23.7% of patients. Mendelian susceptibility to mycobacterial diseases (MSMD) and IL12RB1 mutations was more common in our population compared to the Western world and the Middle East. Two patients with hypomorphic RAG1 mutations and one female with skewed CYBB mutation were also identified. Another 40 patients had variants classified as variants of uncertain significance (VUS). The study shows that targeted NGS is an effective diagnostic strategy for PIDs in countries with limited diagnostic resources. Molecular diagnosis of PID helps in genetic counseling and to make therapeutic decisions including the need for a stem cell transplantation.
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13
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Yeh YH, Hsieh MY, Lee WI, Huang JL, Chen LC, Yeh KW, Ou LS, Yao TC, Wu CY, Lin SJ. Distinct Clinical Features and Novel Mutations in Taiwanese Patients With X-Linked Agammaglobulinemia. Front Immunol 2020; 11:2001. [PMID: 33013854 PMCID: PMC7498534 DOI: 10.3389/fimmu.2020.02001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/24/2020] [Indexed: 12/18/2022] Open
Abstract
Background: X-linked agammaglobulinemia (XLA) is caused by a mutation of the Bruton's tyrosine kinase (BTK) gene and is the most common genetic mutation in patients with congenital agammaglobulinemia. The aim of this study was to analyze the clinical features, genetic defects, and/or BTK expression in patients suspected of having XLA who were referred from the Taiwan Foundation of Rare Disorders (TFRD). Methods: Patients with recurrent bacterial infections in the first 2 years of life, serum IgG/A/M below 2 standard deviations of the normal range, and ≦2% CD19+B cells were enrolled during the period of 2004-2019. The frequency of infections, pathogens, B-lymphocyte subsets, and family pedigree were recorded. Peripheral blood samples were sent to our institute for BTK expression and genetic analysis. Results: Nineteen (from 16 families) out of 29 patients had BTK mutations, including 7 missense mutations, 7 splicing mutations, 1 nonsense mutation, 2 huge deletions, and 2 nucleotide deletions. Six novel mutations were detected: c.504G>T [p.K168N], c.895-2A>G [p.Del K290 fs 23*], c.910T>G [p.F304V], c.1132T>C [p.T334H], c.1562A>T [p.D521V], and c.1957delG [Del p.D653 fs plus 45 a.a.]. All patients with BTK mutations had obviously decreased BTK expressions. Pseudomonas sepsis developed in 14 patients and led to both Shanghai fever and recurrent hemophagocytic lymphohistiocytosis (HLH). Recurrent sinopulmonary infections and bronchiectasis occurred in 11 patients. One patient died of pseudomonas sepsis and another died of hepatocellular carcinoma before receiving optimal treatment. Two patients with contiguous gene deletion syndrome (CGS) encompassing the TIMM8A/DDP1 gene presented with early-onset progressive post-lingual sensorineural Deafness, gradual Dystonia, and Optic Neuronopathy syndrome (DDON) or Mohr-Tranebjaerg syndrome (MTS). Conclusion: Pseudomonas sepsis was more common (74%) than recurrent sinopulmonary infections in Taiwanese XLA patients, and related to Shanghai fever and recurrent HLH, both of which were prevented by regular immunoglobulin infusions. Approximately 10% of patients belonged to CGS involving the TIMM8A/DDP1 gene and presented with the DDON/MTS phenotype in need of aggressive psychomotor therapy.
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Affiliation(s)
- Yu-Hsin Yeh
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Meng-Ying Hsieh
- Division of Pediatric Neurology, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Wen-I Lee
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Primary Immunodeficiency Care and Research (PICAR) Institute and Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Jing-Long Huang
- Primary Immunodeficiency Care and Research (PICAR) Institute and Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, New Taipei Municipal TuChen Hospital, New Taipei City, Taiwan
| | - Li-Chen Chen
- Department of Pediatrics, New Taipei Municipal TuChen Hospital, New Taipei City, Taiwan
| | - Kuo-Wei Yeh
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Liang-Shiou Ou
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Tsung-Chieh Yao
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chao-Yi Wu
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Syh-Jae Lin
- Division of Allergy, Asthma, and Rheumatology, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung University College of Medicine, Taoyuan, Taiwan
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14
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Rivière JG, Franco-Jarava C, Martínez-Gallo M, Aguiló-Cucurull A, Blasco-Pérez L, Paramonov I, Antolín M, Martín-Nalda A, Soler-Palacín P, Colobran R. Uncovering Low-Level Maternal Gonosomal Mosaicism in X-Linked Agammaglobulinemia: Implications for Genetic Counseling. Front Immunol 2020; 11:46. [PMID: 32117230 PMCID: PMC7028698 DOI: 10.3389/fimmu.2020.00046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/09/2020] [Indexed: 11/20/2022] Open
Abstract
X-linked agammaglobulinemia (XLA) is a clinically and genetically well-defined immunodeficiency and the most common form of agammaglobulinemia. It is characterized by susceptibility to recurrent bacterial infections, profound hypogammaglobulinemia, and few or no circulating B cells. XLA is caused by mutations in the BTK gene, which encodes Bruton's tyrosine kinase (BTK). Because of its X-linked recessive inheritance pattern, XLA virtually only affects males, and the mother is the carrier of the mutation in 80–85% of the males with this condition. In the remaining 15–20% of the cases, the affected male is considered to have a de novo mutation. Here, we present the case of a child with a diagnosis of XLA caused by a missense mutation in the BTK gene (c.494G>A/p.C165Y). Apparently, his mother was wild type for this gene, which implied that the mutation was de novo, but careful analysis of Sanger electropherograms and the use of high-coverage massive parallel sequencing revealed low-level maternal gonosomal mosaicism. The mutation was detected in various samples from the mother (blood, urine, buccal swab, and vaginal swab) at a low frequency of 2–5%, and the status of the patient's mutation changed from de novo to inherited. This study underscores the importance of accurately establishing the parents' status on detection of an apparently de novo mutation in a patient, as inadvertent low-level mosaicism may lead to misinterpretation of the risk of recurrence, vital for genetic counseling.
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Affiliation(s)
- Jacques G Rivière
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Model Foundation Excellence Center, Barcelona, Spain
| | - Clara Franco-Jarava
- Jeffrey Model Foundation Excellence Center, Barcelona, Spain.,Immunology Division, Department of Cell Biology, Physiology and Immunology, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain
| | - Mónica Martínez-Gallo
- Jeffrey Model Foundation Excellence Center, Barcelona, Spain.,Immunology Division, Department of Cell Biology, Physiology and Immunology, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain
| | - Aina Aguiló-Cucurull
- Jeffrey Model Foundation Excellence Center, Barcelona, Spain.,Immunology Division, Department of Cell Biology, Physiology and Immunology, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain
| | - Laura Blasco-Pérez
- Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Ida Paramonov
- Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - María Antolín
- Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Andrea Martín-Nalda
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Model Foundation Excellence Center, Barcelona, Spain
| | - Pere Soler-Palacín
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Model Foundation Excellence Center, Barcelona, Spain
| | - Roger Colobran
- Jeffrey Model Foundation Excellence Center, Barcelona, Spain.,Immunology Division, Department of Cell Biology, Physiology and Immunology, Vall d'Hebron Research Institute, Hospital Universitari Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain.,Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron, Barcelona, Spain
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15
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Wang J, Ran T, Chen Y, Lu T. Bayesian machine learning to discover Bruton's tyrosine kinase inhibitors. Chem Biol Drug Des 2019; 96:1114-1122. [PMID: 31855311 DOI: 10.1111/cbdd.13656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/23/2019] [Accepted: 12/07/2019] [Indexed: 11/27/2022]
Abstract
Bruton's tyrosine kinase (BTK) has a crucial role in multiple cell signaling pathways including B-cell antigen receptor (BCR) and Fc receptor (FcR) signaling cascades, which has attracted much attention to find BTK inhibitors to treat autoimmune diseases. In this work, we constructed a Bayesian classification model for virtually seeking novel BTK inhibitors, which showed good performance in terms of screening efficiency and accuracy. Through searching for several chemical libraries including Chembl_17 (1,317,484 compounds), Chembridge (103,473 compounds), and Chemdiv (700,000 compounds) using this model followed by molecular docking and activity prediction, 52 compounds with novel scaffolds were acknowledged as potential BTK inhibitors, which could be promising starting points for further exploration. This study also provided a guide to construct an efficient and effective protocol for virtual screening by integrating machine learning methods.
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Affiliation(s)
- Jian Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China.,Zhejiang Pharmaceutical College, Ningbo, China
| | - Ting Ran
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Yadong Chen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Tao Lu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
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16
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Girard J, Reneau J, Devata S, Wilcox RA, Kaminski MS, Mercer J, Carty S, Phillips TJ. Evaluating Acalabrutinib In The Treatment Of Mantle Cell Lymphoma: Design, Development, And Place In Therapy. Onco Targets Ther 2019; 12:8003-8014. [PMID: 31686856 PMCID: PMC6777435 DOI: 10.2147/ott.s155778] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/16/2019] [Indexed: 01/09/2023] Open
Abstract
Mantle cell lymphoma (MCL) is an incurable intermediate-grade lymphoma representing 5-6% of non-Hodgkin's lymphomas diagnosed in the United States. The introduction of inhibitors of Bruton's tyrosine kinase (BTK) into targeted therapy for MCL has significantly improved outcomes in patients with relapsed/refractory (R/R) disease. Since the initial approval of the first-generation inhibitor, ibrutinib, several second-generation inhibitors have been explored. Acalabrutinib, a second-generation BTK inhibitor, has demonstrated impressive efficacy in clinical trials along with a safety profile that thus far appears improved compared to ibrutinib. The results of a Phase II trial in patients with R/R MCL led to the approval of acalabrutinib in this patient population while fueling further exploration of acalabrutinib in several ongoing clinical trials.
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Affiliation(s)
- Jennifer Girard
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - John Reneau
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Sumana Devata
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Ryan A Wilcox
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Mark S Kaminski
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Jessica Mercer
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Shannon Carty
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
| | - Tycel J Phillips
- Department of Internal Medicine, Division of Hematology-Oncology, Rogel Cancer Center University of Michigan, Ann Arbor, MI, USA
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17
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Wang N, Tian Y, Jia S, Shao L, Yu W, Fang M. A novel Bruton tyrosine kinase gene variation was found in an adult with X-linked agammaglobulinemia during blood cross-matching prior to surgical operation. Transfus Med 2019; 29:364-368. [PMID: 31115091 DOI: 10.1111/tme.12601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 04/12/2019] [Accepted: 04/13/2019] [Indexed: 12/01/2022]
Abstract
AIMS/OBJECTIVES To investigate the underlying molecular mechanism of the patient's ABO typing discrepancy. BACKGROUND ABO typing discrepancy was frequently seen in patients due to different causes. In this study, ABO typing discrepancy was found in a 24-year-old man with arthralgia, whose forward ABO grouping was O and reverse ABO grouping was AB. Primary immunodeficiency disease was speculated in this patient, especially X-linked agammaglobulinemia (XLA). METHODS Immunoglobulins of all isotypes were detected using a specific protein analyser. Lymphocyte subgroups were analysed by flow cytometry. All 19 exons and boundaries of BTK gene were amplified by polymerase chain reaction (PCR), and all PCR products were sequenced by a DNA analyser. BTK protein in the leukocytes and platelets was detected by Western blot. RESULTS No B lymphocytes could be detected in the peripheral blood of the patient. A novel BTK gene variation, c.817G>T, in the exon 9 of BTK gene was discovered. No BTK protein expression could be detected in the leukocytes and platelets of the patient. CONCLUSIONS XLA could be occasionally discovered by ABO typing discrepancy in some cases because of the deficiency of reciprocal IgM anti-A and/or anti-B antibodies in the serum of the patient. Humoral immunodeficiency is one of the causes of ABO typing discrepancy.
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Affiliation(s)
- N Wang
- Department of Hematology, First Affiliated Hospital of Dalian Medical University, Dalian, China.,Department of Blood Typing Laboratory, Dalian Blood Center, Dalian, China
| | - Y Tian
- Department of Hematology, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - S Jia
- Department of Hematology, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - L Shao
- Department of Blood Typing Laboratory, Dalian Blood Center, Dalian, China
| | - W Yu
- Department of Blood Typing Laboratory, Dalian Blood Center, Dalian, China
| | - M Fang
- Department of Hematology, First Affiliated Hospital of Dalian Medical University, Dalian, China.,Department of Hematology, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
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18
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El-Sayed ZA, Abramova I, Aldave JC, Al-Herz W, Bezrodnik L, Boukari R, Bousfiha AA, Cancrini C, Condino-Neto A, Dbaibo G, Derfalvi B, Dogu F, Edgar JDM, Eley B, El-Owaidy RH, Espinosa-Padilla SE, Galal N, Haerynck F, Hanna-Wakim R, Hossny E, Ikinciogullari A, Kamal E, Kanegane H, Kechout N, Lau YL, Morio T, Moschese V, Neves JF, Ouederni M, Paganelli R, Paris K, Pignata C, Plebani A, Qamar FN, Qureshi S, Radhakrishnan N, Rezaei N, Rosario N, Routes J, Sanchez B, Sediva A, Seppanen MR, Serrano EG, Shcherbina A, Singh S, Siniah S, Spadaro G, Tang M, Vinet AM, Volokha A, Sullivan KE. X-linked agammaglobulinemia (XLA):Phenotype, diagnosis, and therapeutic challenges around the world. World Allergy Organ J 2019; 12:100018. [PMID: 30937141 PMCID: PMC6439403 DOI: 10.1016/j.waojou.2019.100018] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 01/29/2019] [Accepted: 02/13/2019] [Indexed: 11/17/2022] Open
Abstract
Background X-linked agammaglobulinemia is an inherited immunodeficiency recognized since 1952. In spite of seven decades of experience, there is still a limited understanding of regional differences in presentation and complications. This study was designed by the Primary Immunodeficiencies Committee of the World Allergy Organization to better understand regional needs, challenges and unique patient features. Methods A survey instrument was designed by the Primary Immunodeficiencies Committee of the World Allergy Organization to collect both structured and semi-structured data on X-linked agammaglobulinemia. The survey was sent to 54 centers around the world chosen on the basis of World Allergy Organization participation and/or registration in the European Society for Immunodeficiencies. There were 40 centers that responded, comprising 32 countries. Results This study reports on 783 patients from 40 centers around the world. Problems with diagnosis are highlighted by the reported delays in diagnosis>24 months in 34% of patients and the lack of genetic studies in 39% of centers Two infections exhibited regional variation. Vaccine-associated paralytic poliomyelitis was seen only in countries with live polio vaccination and two centers reported mycobacteria. High rates of morbidity were reported. Acute and chronic lung diseases accounted for 41% of the deaths. Unusual complications such as inflammatory bowel disease and large granular lymphocyte disease, among others were specifically enumerated, and while individually uncommon, they were collectively seen in 20.3% of patients. These data suggest that a broad range of both inflammatory, infectious, and autoimmune conditions can occur in patients. The breadth of complications and lack of data on management subsequently appeared as a significant challenge reported by centers. Survival above 20 years of age was lowest in Africa (22%) and reached above 70% in Australia, Europe and the Americas. Centers were asked to report their challenges and responses (n = 116) emphasized the difficulties in access to immunoglobulin products (16%) and reflected the ongoing need for education of both patients and referring physicians. Conclusions This is the largest study of patients with X-linked agammaglobulinemia and emphasizes the continued morbidity and mortality of XLA despite progress in diagnosis and treatment. It presents a world view of the successes and challenges for patients and physicians alike. A pivotal finding is the need for education of physicians regarding typical symptoms suggesting a possible diagnosis of X-linked agammaglobulinemia and sharing of best practices for the less common complications.
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Affiliation(s)
- Zeinab A El-Sayed
- Pediatric Allergy and Immunology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | - Irina Abramova
- Department of Immunology, National Medical and Research Center for Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Juan Carlos Aldave
- Primary Immunodeficiency Unit, Allergy and Immunology Division, Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru
| | - Waleed Al-Herz
- Department of Pediatrics, Faculty of Medicine, Kuwait University, Allergy and Clinical Immunology Unit, Al-Sabah Hospital, Kuwait City, Kuwait
| | - Liliana Bezrodnik
- Immunology Unit Hospital de Niños Ricardo Gutiérrez and CIC (Clinical Immunology Center), CABA, Buenos Aires, Argentina
| | - Rachida Boukari
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | - Ahmed Aziz Bousfiha
- Clinical Immunology Unit, P1, Ibn Rushd Hospital, Laboratoire d'Immunologie Clinique, Inflammation et Allergie LICIA and Medicine and Pharmacy Faculty of Hassan II University, Casablanca, Morocco
| | - Caterina Cancrini
- University Department of Pediatrics, Unit of Immune and Infectious Diseases, Childrens' Hospital Bambino Gesù, "University of Rome Tor Vergata", Rome, Italy
| | - Antonio Condino-Neto
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo - Sp, Brazil
| | - Ghassan Dbaibo
- Division of Pediatric Infectious Diseases and Center for Infectious Diseases Research, Department of Pediatrics and Adolescent Medicine, American University of Beirut, Beirut, Lebanon
| | - Beata Derfalvi
- Dalhousie University, IWK Health Centre, Halifax, Nova Scotia, Canada
| | - Figen Dogu
- Ankara University School of Medicine, Department of Pediatric Immunology and Allergy, Ankara, Turkey
| | - J David M Edgar
- The Royal Hospitals & Queen's University Belfast, United Kingdom
| | - Brian Eley
- Paediatric Infectious Diseases Unit, Red Cross War Memorial Children's Hospital and the Department of Paediatrics and Child Health, University of Cape Town, Cape Town, South Africa
| | - Rasha Hasan El-Owaidy
- Pediatric Allergy and Immunology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | | | - Nermeen Galal
- Department of Pediatrics, Faculty of Medicine, Cairo University, Egypt
| | - Filomeen Haerynck
- Primary Immunodeficiency Research Lab, Ghent University, Belgium.,Centre for Primary Immunodeficiency, Department of Pediatric Pulmonology and Immunology, Ghent University Hospital, Belgium
| | - Rima Hanna-Wakim
- Division of Pediatric Infectious Diseases and Center for Infectious Diseases Research, Department of Pediatrics and Adolescent Medicine, American University of Beirut, Beirut, Lebanon
| | - Elham Hossny
- Pediatric Allergy and Immunology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | - Aydan Ikinciogullari
- Ankara University School of Medicine, Department of Pediatric Immunology and Allergy, Ankara, Turkey
| | - Ebtihal Kamal
- Department of Microbiology, Parasitology and Immunology, Faculty of Medicine, University of Khartoum, Sudan
| | - Hirokazu Kanegane
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Nadia Kechout
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | - Yu Lung Lau
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Tomohiro Morio
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Viviana Moschese
- Pediatric Immunopathology and Allergology Unit, Tor Vergata University Hospital, University of Rome Tor Vergata, Rome, Italy
| | - Joao Farela Neves
- Primary Immunodeficiencies Unit, Hospital Dona Estefânia, Centro Hospitalar de Lisboa Central and CEDOC Nova Medical School, Lisboa, Portugal
| | - Monia Ouederni
- Pediatric Immuno-hematology Unit, Bone Marrow Transplantation Center, University Tunis El Manar, Faculty of Medicine, Tunis, Tunisia
| | - Roberto Paganelli
- Department of Medicine and Sciences of Aging, University "G. d'Annunzio" of Chieti-Pescara, Italy
| | | | - Claudio Pignata
- Department of Translational Medical Sciences, Section of Pediatrics, Federico II University, Naples, Italy
| | - Alessandro Plebani
- Pediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, Department of Clinical and Experimental Sciences, University of Brescia and ASST-Spedali Civili of Brescia, Brescia, Italy
| | - Farah Naz Qamar
- Department of Pediatric and Child Health, Aga Khan University Hospital, Karachi, Pakistan
| | - Sonia Qureshi
- Department of Pediatric and Child Health, Aga Khan University Hospital, Karachi, Pakistan
| | - Nita Radhakrishnan
- Department of Pediatric Hematology Oncology, Super Speciality Pediatric Hospital and PG Teaching Institute, Noida, India
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, and Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | | | - John Routes
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Berta Sanchez
- Servicio de Inmunología, Hospital Universitario Virgen del Rocío, Seville, Spain
| | - Anna Sediva
- Department of Immunology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Mikko Rj Seppanen
- Rare Diseases Center, Children's Hospital and Adult Immunodeficiency Unit, Infectious Diseases, Inflammation Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Edith Gonzalez Serrano
- The Immunodeficiencies Research Unit, National Institute of Pediatrics, Mexico City, Mexico
| | - Anna Shcherbina
- Department of Immunology, National Medical and Research Center for Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Surjit Singh
- Department of Pediatrics and Chief, Allergy Immunology Unit, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Sangeetha Siniah
- Paediatric Institute Kuala Lumpur General Hospital, Kuala Lumpur, Malaysia.,Department of Allergy and Immunology, The Royal Children's Hospital Melbourne, Australia.,Murdoch Children's Research Institute, Melbourne, Australia
| | | | - Mimi Tang
- The University of Melbourne, Australia
| | | | - Alla Volokha
- Department of Pediatric Infectious Diseases and Immunology, Shupyk National Medical Academy of Postgraduate Education and Center for Clinical Immunology, City Children's Hospital N1, Kiev, Ukraine
| | - Kathleen E Sullivan
- Division of Allergy Immunology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
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19
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Abstract
BACKGROUND Numerous different types of variations can occur in DNA and have diverse effects and consequences. The Variation Ontology (VariO) was developed for systematic descriptions of variations and their effects at DNA, RNA and protein levels. RESULTS VariO use and terms for DNA variations are described in depth. VariO provides systematic names for variation types and detailed descriptions for changes in DNA function, structure and properties. The principles of VariO are presented along with examples from published articles or databases, most often in relation to human diseases. VariO terms describe local DNA changes, chromosome number and structure variants, chromatin alterations, as well as genomic changes, whether of genetic or non-genetic origin. CONCLUSIONS DNA variation systematics facilitates unambiguous descriptions of variations and their effects and further reuse and integration of data from different sources by both human and computers.
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Affiliation(s)
- Mauno Vihinen
- Department of Experimental Medical Science, Lund University, BMC B13, SE-22184, Lund, Sweden.
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20
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Vince N, Mouillot G, Malphettes M, Limou S, Boutboul D, Guignet A, Bertrand V, Pellet P, Gourraud PA, Debré P, Oksenhendler E, Théodorou I, Fieschi C. Genetic screening of male patients with primary hypogammaglobulinemia can guide diagnosis and clinical management. Hum Immunol 2018; 79:571-577. [PMID: 29709555 DOI: 10.1016/j.humimm.2018.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 04/25/2018] [Accepted: 04/26/2018] [Indexed: 10/17/2022]
Abstract
The precise diagnosis of an immunodeficiency is sometimes difficult to assess, especially due to the large spectrum of phenotypic variation reported among patients. Common variable immunodeficiency disorders (CVID) do not have, for a large part, an identified genetic cause. The identification of a causal genetic mutation is important to confirm, or in some cases correct, the diagnosis. We screened >150 male patients with hypogammaglobulinemia for mutations in three genes involved in pediatric X-linked primary immunoglobulin deficiency: CD40LG, SH2D1A and BTK. The SH2D1A screening allowed to reclassify two individuals with an initial CVID presentation as XLP after mutations identification. All these mutations were associated with a lack of protein expression. In addition, 4 patients with a primary diagnosis of CVID and one with a primary IgG subclass deficiency were requalified as XLA after identifying BTK mutations. Interestingly, two out of these 5 patients carried a damaging coding BTK mutation associated with a lower, but detectable, BTK expression in monocytes, suggesting that a dysfunctional protein explains the disease phenotype in these patients. In conclusion, our results advocate to include SH2D1A and BTK in newly developed targeted NGS genetic testing, to contribute to providing the most appropriate medical treatment and genetic counselling.
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Affiliation(s)
- Nicolas Vince
- EA3963, Université Paris 7 Denis Diderot, Centre Hayem, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France; Centre de Recherche en Transplantation et Immunologie UMR 1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France.
| | - Gaël Mouillot
- Laboratoire Central d'Immunologie Cellulaire et Tissulaire, Hôpital Pitié Salpêtrière et INSERM UMR-S945, Bâtiment CERVI, Paris, France
| | - Marion Malphettes
- EA3963, Université Paris 7 Denis Diderot, Centre Hayem, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France; Département d'Immunologie Clinique, Hôpital Saint-Louis, AP-HP, 1 Avenue Claude Vellefaux, 75010 Paris, France
| | - Sophie Limou
- Centre de Recherche en Transplantation et Immunologie UMR 1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France; Ecole Centrale de Nantes, Nantes, France
| | - David Boutboul
- EA3963, Université Paris 7 Denis Diderot, Centre Hayem, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
| | - Angélique Guignet
- EA3963, Université Paris 7 Denis Diderot, Centre Hayem, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
| | - Véronique Bertrand
- Laboratoire Central d'Immunologie Cellulaire et Tissulaire, Hôpital Pitié Salpêtrière et INSERM UMR-S945, Bâtiment CERVI, Paris, France
| | - Philippe Pellet
- Laboratoire Central d'Immunologie Cellulaire et Tissulaire, Hôpital Pitié Salpêtrière et INSERM UMR-S945, Bâtiment CERVI, Paris, France
| | - Pierre-Antoine Gourraud
- Centre de Recherche en Transplantation et Immunologie UMR 1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Patrice Debré
- Laboratoire Central d'Immunologie Cellulaire et Tissulaire, Hôpital Pitié Salpêtrière et INSERM UMR-S945, Bâtiment CERVI, Paris, France
| | - Eric Oksenhendler
- Département d'Immunologie Clinique, Hôpital Saint-Louis, AP-HP, 1 Avenue Claude Vellefaux, 75010 Paris, France
| | - Ioannis Théodorou
- Laboratoire Central d'Immunologie Cellulaire et Tissulaire, Hôpital Pitié Salpêtrière et INSERM UMR-S945, Bâtiment CERVI, Paris, France
| | - Claire Fieschi
- EA3963, Université Paris 7 Denis Diderot, Centre Hayem, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France; Département d'Immunologie Clinique, Hôpital Saint-Louis, AP-HP, 1 Avenue Claude Vellefaux, 75010 Paris, France
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21
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Tang P, Upton JEM, Barton-Forbes MA, Salvadori MI, Clynick MP, Price AK, Goobie SL. Autosomal Recessive Agammaglobulinemia Due to a Homozygous Mutation in PIK3R1. J Clin Immunol 2017; 38:88-95. [PMID: 29178053 DOI: 10.1007/s10875-017-0462-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 11/13/2017] [Indexed: 12/17/2022]
Abstract
The role of class IA phosphoinositide 3 kinases (PI3Ks) in immune function and regulation continues to expand with the identification of greater numbers of genetic variants. This case report is the second reported case of a homozygous premature stop codon within the PIK3R1 gene leading to autosomal recessive agammaglobulinemia. The proband, born to consanguineous parents, presented at 10 months of age with a history of oropharyngeal petechiae and bleeding from the mouth, gums, and tear ducts. Initial investigations revealed thrombocytopenia, neutropenia and the absence of B cells. Further genetic testing via a custom next-generation sequencing panel confirmed the presence of a homozygous mutation in PIK3R1, c.901 C>T, a premature stop codon at amino acid position 301. Given their many roles in immune regulation, recessive mutations in the PlK3R1 gene should be considered in infants presenting with hypogammaglobulinemia or agammaglobulinemia, particularly in the setting of parental consanguinity.
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Affiliation(s)
- Paoyun Tang
- Department of Pediatrics, London Health Science Centre, 800 Commissioners Road East, London, ON, N6A 5W9, Canada
| | - Julia E M Upton
- Department of Pediatrics, Division of Immunology and Allergy, Hospital for Sick Children, University of Toronto, 7280-555 University Ave, Toronto, ON, M5G 1X8, Canada
| | - Michelle A Barton-Forbes
- Department of Pediatrics, London Health Science Centre, 800 Commissioners Road East, London, ON, N6A 5W9, Canada
| | - Marina I Salvadori
- Department of Pediatrics, London Health Science Centre, 800 Commissioners Road East, London, ON, N6A 5W9, Canada
| | - Meghan P Clynick
- Department of Dermatology, Sunnybrook Health Science Centre, Unit M1 100, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - April K Price
- Department of Pediatrics, London Health Science Centre, 800 Commissioners Road East, London, ON, N6A 5W9, Canada
| | - Sharan L Goobie
- Maritime Medical Genetics, Department of Pediatrics, Izaak Walton Killam (IWK) Health Centre, 5850/5980 University Avenue, PO Box 9700, Halifax, NS, B3K 6R8, Canada.
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22
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Bryan BA, Battersby A, Shillitoe BMJ, Barge D, Bourne H, Flood T, Cant AJ, Stroud C, Gennery AR. Respiratory Health and Related Quality of Life in Patients with Congenital Agammaglobulinemia in the Northern Region of the UK. J Clin Immunol 2016; 36:472-9. [PMID: 27091141 PMCID: PMC4896978 DOI: 10.1007/s10875-016-0284-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/05/2016] [Indexed: 11/23/2022]
Abstract
Introduction Patients with congenital agammaglobulinemia, characterized by a defect in B lymphocyte differentiation causing B alymphocytosis, require life-long IgG replacement. There is scant literature regarding the effectiveness of IgG treatment at preventing mucosal (particularly sinopulmonary tract) infection and whether current management adequately restores “normal” health and quality of life (QoL). We aimed to document infective episodes pre- and post-commencing IgG replacement, determine any change in lung function and structure and assess respiratory status and QoL in a cohort of patients treated in Newcastle. Methods Clinical data were extracted from medical records of 15 patients identified from the immunology database, focusing on infective episodes, serial chest CT and spirometry results. Thirteen patients completed a selection of standardized and validated questionnaires assessing physical health, respiratory health and QoL. Results Pediatric patients on IgG therapy suffered fewer infections per patient year (0.74) than adults (2.13). 6/14 patients showed deteriorating respiratory status despite adequate therapy. Health questionnaires revealed a significant burden of respiratory disease on a patient’s life. Conclusion Clinical data showed patients with congenital agammaglobulinemia receiving immunoglobulin therapy retained a higher than average infection rate, most of which affected mucosal barriers. Most patients self-reported worse respiratory symptoms, a lower respiratory-related QoL and a lower general health QoL relative to a healthy population. Most participants had progressive structural lung damage and decreased lung function. These results suggest that current management is not entirely effective at preventing deterioration of respiratory health or restoring QoL.
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Affiliation(s)
- Branwen A Bryan
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Alex Battersby
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Benjamin Martin James Shillitoe
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Dawn Barge
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Helen Bourne
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Terry Flood
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Andrew J Cant
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Catherine Stroud
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Andrew R Gennery
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK. .,Great North Children's Hospital, Clinical Resource Building, Level 4, Block 2, Newcastle upon Tyne, NE1 4LP, UK.
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23
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Fang M, Abolhassani H, Lim CK, Zhang J, Hammarström L. Next Generation Sequencing Data Analysis in Primary Immunodeficiency Disorders - Future Directions. J Clin Immunol 2016; 36 Suppl 1:68-75. [PMID: 26993986 DOI: 10.1007/s10875-016-0260-y] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 02/28/2016] [Indexed: 12/16/2022]
Abstract
Primary immunodeficiency diseases (PIDs) comprise a group of highly heterogeneous immune system diseases and around 300 forms of PID have been described to date. Next Generation Sequencing (NGS) has recently become an increasingly used approach for gene identification and molecular diagnosis of human diseases. Herein we summarize the practical considerations for the interpretation of NGS data and the techniques for searching disease-related PID genes, and suggest future directions for research in this field.
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Affiliation(s)
- Mingyan Fang
- Department of Laboratory Medicine, Division of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital Huddinge, -141 86, Stockholm, SE, Sweden.,BGI-Shenzhen, Shenzhen, 518083, China
| | - Hassan Abolhassani
- Department of Laboratory Medicine, Division of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital Huddinge, -141 86, Stockholm, SE, Sweden.,Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Che Kang Lim
- Department of Laboratory Medicine, Division of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital Huddinge, -141 86, Stockholm, SE, Sweden.,Department of Clinical Research, Singapore General Hospital, Singapore, 169856, Singapore
| | | | - Lennart Hammarström
- Department of Laboratory Medicine, Division of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital Huddinge, -141 86, Stockholm, SE, Sweden.
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24
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Rodríguez-Cortez VC, Del Pino-Molina L, Rodríguez-Ubreva J, López-Granados E, Ballestar E. Dissecting Epigenetic Dysregulation of Primary Antibody Deficiencies. J Clin Immunol 2016; 36 Suppl 1:48-56. [PMID: 26984849 DOI: 10.1007/s10875-016-0267-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 03/07/2016] [Indexed: 01/04/2023]
Abstract
Primary antibody deficiencies (PADs), the most prevalent inherited primary immunodeficiencies (PIDs), are associated with a wide range of genetic alterations (both monogenic or polygenic) in B cell-specific genes. However, correlations between the genotype and clinical manifestations are not evident in all cases indicating that genetic interactions, environmental and epigenetic factors may have a role in PAD pathogenesis. The recent identification of key defects in DNA methylation in common variable immunodeficiency as well as the multiple evidences on the role of epigenetic control during B cell differentiation, activation and during antibody formation highlight the importance of investing research efforts in dissecting the participation of epigenetic defects in this group of diseases. This review focuses on the role of epigenetic control in B cell biology which can provide clues for the study of potential novel pathogenic defects involved in PADs.
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Affiliation(s)
- Virginia C Rodríguez-Cortez
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de Llobregat, Barcelona, Spain
| | - Lucia Del Pino-Molina
- Clinical Immunology Department, University Hospital La Paz, Paseo de la Castellana 261, 28046, Madrid, Spain
- Physiopathology of Lymphocytes in Immunodeficiencies Group, IdiPAZ Institute for Health Research, Paseo de la Castellana 261, 28046, Madrid, Spain
| | - Javier Rodríguez-Ubreva
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de Llobregat, Barcelona, Spain
| | - Eduardo López-Granados
- Clinical Immunology Department, University Hospital La Paz, Paseo de la Castellana 261, 28046, Madrid, Spain
- Physiopathology of Lymphocytes in Immunodeficiencies Group, IdiPAZ Institute for Health Research, Paseo de la Castellana 261, 28046, Madrid, Spain
| | - Esteban Ballestar
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de Llobregat, Barcelona, Spain.
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25
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Clinical and mutational features of X-linked agammaglobulinemia in Mexico. Clin Immunol 2016; 165:38-44. [PMID: 26960951 DOI: 10.1016/j.clim.2016.02.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/14/2015] [Accepted: 02/29/2016] [Indexed: 11/20/2022]
Abstract
X-linked agammaglobulinemia (XLA) is caused by BTK mutations, patients typically show <2% of peripheral B cells and reduced levels of all immunoglobulins; they suffer from recurrent infections of bacterial origin; however, viral infections, autoimmune-like diseases, and an increased risk of developing gastric cancer are also reported. In this work, we report the BTK mutations and clinical features of 12 patients diagnosed with XLA. Furthermore, a clinical revision is also presented for an additional cohort of previously reported patients with XLA. Four novel mutations were identified, one of these located in the previously reported mutation refractory SH3 domain. Clinical data support previous reports accounting for frequent respiratory, gastrointestinal tract infections and other symptoms such as the occurrence of reactive arthritis in 19.2% of the patients. An equal proportion of patients developed septic arthritis; missense mutations and mutations in SH1, SH2 and PH domains predominated in patients who developed arthritis.
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26
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Aadam Z, Kechout N, Barakat A, Chan KW, Ben-Ali M, Ben-Mustapha I, Zidi F, Ailal F, Attal N, Doudou F, Abbadi MC, Kaddache C, Smati L, Touri N, Chemli J, Gargah T, Brini I, Bakhchane A, Charoute H, Jeddane L, El Atiqi S, El Hafidi N, Hida M, Saile R, Alj HS, Boukari R, Bejaoui M, Najib J, Barbouche MR, Lau YL, Mellouli F, Bousfiha AA. X-Linked Agammagobulinemia in a Large Series of North African Patients: Frequency, Clinical Features and Novel BTK Mutations. J Clin Immunol 2016; 36:187-94. [PMID: 26931785 DOI: 10.1007/s10875-016-0251-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 02/21/2016] [Indexed: 11/26/2022]
Abstract
PURPOSE X-linked agammagobulinemia (XLA) is a primary immunodeficiency caused by Bruton's tyrosine kinase (BTK) gene defect. XLA patients have absent or reduced number of peripheral B cells and a profound deficiency in all immunoglobulin isotypes. This multicenter study reports the clinical, immunological and molecular features of Bruton's disease in 40 North African male patients. METHODS Fifty male out of 63 (male and female) patients diagnosed with serum agammaglobulinemia and non detectable to less than 2% peripheral B cells were enrolled. The search for BTK gene mutations was performed for all of them by genomic DNA amplification and Sanger sequencing. RESULTS We identified 33 different mutations in the BTK gene in 40 patients including 12 missense mutations, 6 nonsense mutations, 6 splice-site mutations, 5 frameshift, 2 large deletions, one complex mutation and one in-frame deletion. Seventeen of these mutations are novel. This large series shows a lower frequency of XLA among male patients from North Africa with agammaglobulinemia and absent to low B cells compared with other international studies (63.5% vs. 85%). No strong evidence for genotype-phenotype correlation was observed. CONCLUSIONS This study adds to other reports from highly consanguineous North African populations, showing lower frequency of X-linked forms as compared to AR forms of the same primary immunodeficiency. Furthermore, a large number of novel BTK mutations were identified and could further help identify carriers for genetic counseling.
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Affiliation(s)
- Zahra Aadam
- Laboratory of Biology and Health URAC34-Metabolic and Immunologic pathology Research Team, Faculty of Science of BenM'sik, King Hassan II University, Casablanca, Morocco
- Institut Pasteur, Human Molecular Genetic Laboratory, Casablanca, Morocco
| | - Nadia Kechout
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | - Abdelhamid Barakat
- Institut Pasteur, Human Molecular Genetic Laboratory, Casablanca, Morocco.
| | - Koon-Wing Chan
- Departments of Pediatrics and Adolescent Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Meriem Ben-Ali
- Laboratory of Transmission, Control and Immunobiology of Infections (LR11IPT02), Institut Pasteur de Tunis, and University Tunis El Manar, Tunis, Tunisia
| | - Imen Ben-Mustapha
- Laboratory of Transmission, Control and Immunobiology of Infections (LR11IPT02), Institut Pasteur de Tunis, and University Tunis El Manar, Tunis, Tunisia
| | - Fethi Zidi
- Department of Pediatrics, Regional Hospital of Tozeur, Tozeur, Tunisia
| | - Fatima Ailal
- Clinical Immunology Unit, Ibn Rochd Hospital, King Hassan II University-AinChok, Casablanca, Morocco
| | - Nabila Attal
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | - Fatouma Doudou
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | - Mohamed-Cherif Abbadi
- Department of Immunology, Institut Pasteur d'Algérie, Faculty of Medicine, Algiers, Algeria
| | | | - Leila Smati
- Department of Pediatrics, EPH Bologhine, Faculty of Medicine, Algiers, Algeria
| | - Nabila Touri
- Department of Pediatrics, CHU Blida, Blida, Algeria
| | - Jalel Chemli
- Department of Pediatrics, Sahloul Hospital, Sousse, Tunisia
| | - Tahar Gargah
- Department of Pediatrics, Charles Nicolle Hospital, Tunis, Tunisia
| | - Ines Brini
- Department of Pediatrics B, Children's Hospital of Tunis, Tunis, Tunisia
| | - Amina Bakhchane
- Institut Pasteur, Human Molecular Genetic Laboratory, Casablanca, Morocco
| | - Hicham Charoute
- Institut Pasteur, Human Molecular Genetic Laboratory, Casablanca, Morocco
| | - Leila Jeddane
- Clinical Immunology Unit, Ibn Rochd Hospital, King Hassan II University-AinChok, Casablanca, Morocco
| | - Sara El Atiqi
- Clinical Immunology Unit, Ibn Rochd Hospital, King Hassan II University-AinChok, Casablanca, Morocco
| | - Naïma El Hafidi
- Department of Pediatric Infectious Diseases, Avicenne University Hospital, Rabat, Morocco
| | - Mustapha Hida
- Department of Pediatrics, Hassan II University Hospital, Fez, Morocco
| | - Rachid Saile
- Laboratory of Biology and Health URAC34-Metabolic and Immunologic pathology Research Team, Faculty of Science of BenM'sik, King Hassan II University, Casablanca, Morocco
| | - Hanane Salih Alj
- Laboratory of Biology and Health URAC34-Metabolic and Immunologic pathology Research Team, Faculty of Science of BenM'sik, King Hassan II University, Casablanca, Morocco
| | - Rachida Boukari
- Department of Pediatrics, CHU Mustapaha Bacha, Faculty of Medicine, Algiers, Algeria
| | - Mohamed Bejaoui
- National Bone Marrow Transplantation Center, Jebel Lakhdar, Tunis, Tunisia
| | - Jilali Najib
- Clinical Immunology Unit, Ibn Rochd Hospital, King Hassan II University-AinChok, Casablanca, Morocco
| | - Mohamed-Ridha Barbouche
- Laboratory of Transmission, Control and Immunobiology of Infections (LR11IPT02), Institut Pasteur de Tunis, and University Tunis El Manar, Tunis, Tunisia
| | - Yu-Lung Lau
- Departments of Pediatrics and Adolescent Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Fethi Mellouli
- National Bone Marrow Transplantation Center, Jebel Lakhdar, Tunis, Tunisia
| | - Ahmed Aziz Bousfiha
- Clinical Immunology Unit, Ibn Rochd Hospital, King Hassan II University-AinChok, Casablanca, Morocco
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Teocchi MA, Domingues Ramalho V, Abramczuk BM, D'Souza-Li L, Santos Vilela MM. BTK mutations selectively regulate BTK expression and upregulate monocyte XBP1 mRNA in XLA patients. Immun Inflamm Dis 2015; 3:171-81. [PMID: 26417435 PMCID: PMC4578518 DOI: 10.1002/iid3.57] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 03/09/2015] [Accepted: 03/10/2015] [Indexed: 12/14/2022] Open
Abstract
Mutations in the Bruton agammaglobulinemia tyrosine kinase (BTK) gene are responsible for X-linked agammaglobulinemia (XLA). Unfolded or misfolded proteins can trigger stress pathways in the endoplasmic reticulum (ER), known as unfolded protein response (UPR). The aim was to clarify the involvement of UPR in XLA pathophysiology. By reverse transcription-quantitative PCR, we evaluated the expression of BTK and 12 UPR-related genes in eight patients. Moreover, we assessed the BTK protein expression and pattern in the patients' monocytes by flow cytometry and fluorescence immunocytochemistry. We found a reduced BTK expression in patients with stop codon mutations (P < 0.02). However, missense mutations did not affect BTK expression. Flow cytometry showed a reduction of BTK in patients which was corroborated by an absent or nonfunctional protein synthesis revealed by immunocytochemistry. In contrast with the other UPR-related genes, X-box binding protein 1 (XBP1) was markedly upregulated in the patients (P < 0.01), suggesting Toll-like receptor (TLR) activation since BTK directly interacts with TLRs as a negative regulator and XBP1 can be activated in direct response to TLR ligation. Different BTK mutations can be identified by the BTK expression. Inasmuch as UPR-related genes were downregulated or unaltered in patients, we speculate the involvement of the TLRs-XBP1 axis in the XLA pathophysiology. Such data could be the basis for further studies of this novel pathomechanism concerning XLA.
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Affiliation(s)
- Marcelo A Teocchi
- Center for Investigation in Pediatrics, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil
| | - Vanessa Domingues Ramalho
- Center for Investigation in Pediatrics, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil
| | - Beatriz M Abramczuk
- Center for Investigation in Pediatrics, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil
| | - Lília D'Souza-Li
- Center for Investigation in Pediatrics, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil ; Department of Pediatrics, Faculty of Medical Sciences, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil
| | - Maria Marluce Santos Vilela
- Center for Investigation in Pediatrics, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil ; Department of Pediatrics, Faculty of Medical Sciences, University of Campinas (UNICAMP) Campinas, São Paulo, Brazil
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Maffei R, Fiorcari S, Martinelli S, Potenza L, Luppi M, Marasca R. Targeting neoplastic B cells and harnessing microenvironment: the "double face" of ibrutinib and idelalisib. J Hematol Oncol 2015; 8:60. [PMID: 26022368 PMCID: PMC4459446 DOI: 10.1186/s13045-015-0157-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 05/14/2015] [Indexed: 01/26/2023] Open
Abstract
Tyrosine kinase inhibitors (TKIs) targeting signaling molecules downstream B cell receptor (BCR) are powerfully spreading in the therapeutic landscape of B cell lymphoproliferative disease, due to a manageable toxicity profile and encouraging clinical effectiveness. In particular, ibrutinib, previously called PCI-32765, is a potent inhibitor of Bruton tyrosine kinase (Btk), recently approved for the treatment of relapsed mantle cell lymphoma (MCL) and chronic lymphocytic leukemia (CLL). Moreover, idelalisib (formerly GS-1101 and CAL-101) is a selective reversible inhibitor of the p110δ isoform of phosphoinositol 3 kinase (PI3K) approved for the treatment of patients with relapsed follicular lymphoma (FL) and CLL. These agents directly affect the neoplastic clone, disrupting the supportive platform provided by BCR signaling cascade and by other microenvironmental mutualistic interactions, and also interfering with chemokine gradients and adhesive properties of neoplastic B cells. In the present review, we describe the clinical efficacy of ibrutinib and idelalisib in CLL and B cell non-Hodgkin lymphoma (B-NHL), then focusing on the mode of action (MOA) of these TKIs towards the neoplastic B cell compartment. At last, the review would further expand the view on potential additional targets of ibrutinib and idelalisib belonging to other microenvironmental cellular elements.
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Affiliation(s)
- Rossana Maffei
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
| | - Stefania Fiorcari
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
| | - Silvia Martinelli
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
| | - Leonardo Potenza
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
| | - Mario Luppi
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
| | - Roberto Marasca
- Hematology Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124, Modena, Italy.
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Mendelian disorders of PI metabolizing enzymes. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1851:867-81. [PMID: 25510381 DOI: 10.1016/j.bbalip.2014.12.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 11/18/2014] [Accepted: 12/01/2014] [Indexed: 12/18/2022]
Abstract
More than twenty different genetic diseases have been described that are caused by mutations in phosphoinositide metabolizing enzymes, mostly in phosphoinositide phosphatases. Although generally ubiquitously expressed, mutations in these enzymes, which are mainly loss-of-function, result in tissue-restricted clinical manifestations through mechanisms that are not completely understood. Here we analyze selected disorders of phosphoinositide metabolism grouped according to the principle tissue affected: the nervous system, muscle, kidney, the osteoskeletal system, the eye, and the immune system. We will highlight what has been learnt so far from the study of these disorders about not only the cellular and molecular pathways that are involved or are governed by phosphoinositides, but also the many gaps that remain to be filled to gain a full understanding of the pathophysiological mechanisms underlying the clinical manifestations of this steadily growing class of diseases, most of which still remain orphan in terms of treatment. This article is part of a Special Issue entitled Phosphoinositides.
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Autosomal-dominant B-cell deficiency with alopecia due to a mutation in NFKB2 that results in nonprocessable p100. Blood 2014; 124:2964-72. [PMID: 25237204 DOI: 10.1182/blood-2014-06-578542] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Most genetic defects that arrest B-cell development in the bone marrow present early in life with agammaglobulinemia, whereas incomplete antibody deficiency is usually associated with circulating B cells. We report 3 related individuals with a novel form of severe B-cell deficiency associated with partial persistence of serum immunoglobulin arising from a missense mutation in NFKB2. Significantly, this point mutation results in a D865G substitution and causes a failure of p100 phosphorylation that blocks processing to p52. Severe B-cell deficiency affects mature and transitional cells, mimicking the action of rituximab. This phenotype appears to be due to disruption of canonical and noncanonical nuclear factor κB pathways by the mutant p100 molecule. These findings could be informative for therapeutics as well as immunodeficiency.
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Immune diseases caused by mutations in kinases and components of the ubiquitin system. Nat Immunol 2014; 15:521-9. [PMID: 24840983 DOI: 10.1038/ni.2892] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 03/10/2014] [Indexed: 12/11/2022]
Abstract
The signaling networks that control the immune system are coordinated by a myriad of interconnecting phosphorylation and ubiquitylation events. This review provides an overview of mutations in human genes encoding these proteins that give rise to immune diseases. Analysis of the biological effects of these mutations has revealed the true physiological roles of particular signaling networks and promises to revolutionize the treatment of these diseases.
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Clinical targeting of mutated and wild-type protein tyrosine kinases in cancer. Mol Cell Biol 2014; 34:1722-32. [PMID: 24567371 DOI: 10.1128/mcb.01592-13] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Clinical therapies for cancer have evolved from toxic, nontargeted agents to manageable, highly targeted therapies. Protein tyrosine kinases are a family of signaling molecules implicated in nearly every cancer type and are the foundation for the development of modern targeted agents. Recent genomic analyses have identified activating mutations, translocations, and amplifications of tyrosine kinases. Selective targeting of these genetically altered tyrosine kinases has resulted in significant clinical advances, including increased patient survival. This indicates that altered protein tyrosine kinases are the main drivers of many different cancers. However, lost during analyses of genetic lesions are the contributions of activated, wild-type kinases on tumor-dependent pathways. New approaches in phosphoproteomic technologies have identified several wild-type tyrosine kinase activation states, suggesting that non-genetically altered kinases can be essential "nodes" for signal transduction. Here, we summarize the evidence supporting the common mechanisms of protein tyrosine kinase activation in cancer and provide a personal perspective on the kinases BCR-ABL and BTK, as well as nonmutated kinase targets in prostate cancer, through our work. We outline the mechanisms of tyrosine kinase activation in the absence of direct mutation and discuss whether non-genetically altered tyrosine kinases or their associated downstream signaling pathways can be effectively targeted.
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Boisson B, Wang YD, Bosompem A, Ma CS, Lim A, Kochetkov T, Tangye SG, Casanova JL, Conley ME. A recurrent dominant negative E47 mutation causes agammaglobulinemia and BCR(-) B cells. J Clin Invest 2014; 123:4781-5. [PMID: 24216514 DOI: 10.1172/jci71927] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 08/09/2013] [Indexed: 11/17/2022] Open
Abstract
Approximately 90% of patients with isolated agammaglobulinemia and failure of B cell development have mutations in genes required for signaling through the pre–B cell and B cell receptors. The nature of the gene defect in the majority of remaining patients is unknown. We recently identified 4 patients with agammaglobulinemia and markedly decreased numbers of peripheral B cells. The B cells that could be detected had an unusual phenotype characterized by the increased expression of CD19 but the absence of a B cell receptor. Genetic studies demonstrated that all 4 patients had the exact same de novo mutation in the broadly expressed transcription factor E47. The mutant protein (E555K) was stable in patient-derived EBV-transformed cell lines and cell lines transfected with expression vectors. E555K in the transfected cells localized normally to the nucleus and resulted in a dominant negative effect when bound to DNA as a homodimer with wild-type E47. Mutant E47 did permit DNA binding by a tissue-specific heterodimeric DNA-binding partner, myogenic differentiation 1 (MYOD). These findings document a mutational hot-spot in E47 and represent an autosomal dominant form of agammaglobulinemia. Further, they indicate that E47 plays a critical role in enforcing the block in development of B cell precursors that lack functional antigen receptors.
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Kraus H, Kaiser S, Aumann K, Bönelt P, Salzer U, Vestweber D, Erlacher M, Kunze M, Burger M, Pieper K, Sic H, Rolink A, Eibel H, Rizzi M. A feeder-free differentiation system identifies autonomously proliferating B cell precursors in human bone marrow. THE JOURNAL OF IMMUNOLOGY 2013; 192:1044-54. [PMID: 24379121 DOI: 10.4049/jimmunol.1301815] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The peripheral B cell compartment is maintained by homeostatic proliferation and through replenishment by bone marrow precursors. Because hematopoietic stem cells cycle at a slow rate, replenishment must involve replication of precursor B cells. To study proliferation of early human B cell progenitors, we established a feeder cell-free in vitro system allowing the development of B cells from CD34(+) hematopoietic stem cells up to the stage of immature IgM(+) B cells. We found that pro-B and pre-B cells generated in vitro can proliferate autonomously and persist up to 7 wk in culture in the absence of signals induced by exogenously added cytokines. Nevertheless, addition of IL-7 enhanced pre-B cell expansion and inhibited maturation into IgM(+) B cells. The B cell precursor subsets replicating in vitro were highly similar to the bone marrow B cell precursors cycling in vivo. The autonomous proliferation of B cell precursor subsets in vitro and their long-term persistence implies that proliferation during pro-B and pre-B cell stages plays an important role in the homeostasis of the peripheral B cell compartment. Our in vitro culture can be used to study defects in B cell development or in reconstitution of the B cell pool after depletion and chemotherapy.
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Affiliation(s)
- Helene Kraus
- Center for Chronic Immunodeficiency, University Medical Center Freiburg, 79108 Freiburg, Germany
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Lim LM, Chang JM, Wang IF, Chang WC, Hwang DY, Chen HC. Atypical X-linked agammaglobulinaemia caused by a novel BTK mutation in a selective immunoglobulin M deficiency patient. BMC Pediatr 2013; 13:150. [PMID: 24074005 PMCID: PMC3849551 DOI: 10.1186/1471-2431-13-150] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 09/24/2013] [Indexed: 01/13/2023] Open
Abstract
Background X-linked agammaglobulinaemia (XLA) is the most common inherited humoural immunodeficiency disorder. Mutations in the gene coding for Bruton’s tyrosine kinase (BTK) have been identified as the cause of XLA. Most affected patients exhibit a marked reduction of serum immunoglobulins, mature B cells, and an increased susceptibility to recurrent bacterial infections. However, the diagnosis of XLA can be a challenge in certain patients who have near-normal levels of serum immunoglobulin. Furthermore, reports on XLA with renal involvement are scant. Case presentation We report an atypical XLA patient who presented with selective immunoglobulin M (IgM) immunodeficiency and nephropathy. He was diagnosed with selective IgM immunodeficiency, based on his normal serum immunoglobulin G (IgG) and immunoglobulin A (IgA) levels but undetectable serum IgM level. Intravenous immunoglobulin was initiated due to increased infections and persistent proteinuria but no improvement in proteinuria was found. A lupus-like nephritis was detected in his kidney biopsy and the proteinuria subsided after receiving a mycophenolate mofetil regimen. Although he had a history of recurrent bacterial infections since childhood, XLA was not diagnosed until B-lymphocyte surface antigen studies and a genetic analysis were conducted. Conclusions We suggest that B-lymphocyte surface antigen studies and a BTK mutation analysis should be performed in familial patients with selective IgM deficiency to rule out atypical XLA.
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Affiliation(s)
- Lee-Moay Lim
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital, 100 Tze-You First Road, Kaohsiung City 807, Taiwan.
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Qin X, Jiang LP, Tang XM, Wang M, Liu EM, Zhao XD. Clinical features and mutation analysis of X-linked agammaglobulinemia in 20 Chinese patients. World J Pediatr 2013; 9:273-7. [PMID: 23335184 DOI: 10.1007/s12519-013-0400-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 05/17/2012] [Indexed: 01/21/2023]
Abstract
BACKGROUND X-linked agammagobulinemia (XLA) is a primary immunodeficiency caused by Bruton's tyrosine kinase (BTK) gene mutation. XLA patients have an extremely small amount of peripheral B cells and profound deficiency in all immunoglobulin isotypes. We analyzed the clinical, immunologic, and molecular characteristics of children with XLA in an attempt to improve the diagnosis and treatment of XLA in China. METHODS Twenty children with XLA-compatible phenotypes from 18 unrelated families were enrolled in this study. The BTK gene was amplified and sequenced, followed by mutation analysis in these children and their female relatives. RESULTS Eighteen different mutations of the BTK gene were identified in the 20 patients. Eleven mutations had been reported previously including eight missense mutations (c.994C>T, c.1987C>A, c.1885G>T, c.502T>C, c.1085C>T, c.1816C>T, c.214C>T, c.1912G>A) and three nonsense mutations (c.1267T>A, c.1793C>G, c.1618C>T). Seven novel mutations of the BTK gene were also presented and included five missense mutations (c.134T>A, c.1646T>A, c.1829C>G, c.711G>T, c.1235G>A), one splice-site mutation (c.523+1G>A) and one insertion mutation (c.1024-1025in sTTGCTAAAGCAACTGCTAAAGCAAG). Eight out of 18 mutations of the BTK gene were located in the TK domain, 4 in the PH domain, 4 in the SH2 domain and 2 in the TH domain. Genetic study for carrier status was carried out in 18 families with definite BTK gene mutations. Nine carriers with BTK gene mutations were identified. Six families without carriers were detected, and 3 patients were not tested in this study. CONCLUSION Our results support that molecular genetic testing represents an important tool for early confirmed diagnosis of congenital agammaglobulinemia and may allow accurate carrier detection and prenatal diagnosis.
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Affiliation(s)
- Xian Qin
- Division of Immunology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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Diagnosis and evaluation of primary panhypogammaglobulinemia: A molecular and genetic challenge. J Allergy Clin Immunol 2013; 131:1717-8. [DOI: 10.1016/j.jaci.2013.03.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 03/15/2013] [Accepted: 03/20/2013] [Indexed: 11/19/2022]
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Casanova JL, Abel L. The genetic theory of infectious diseases: a brief history and selected illustrations. Annu Rev Genomics Hum Genet 2013; 14:215-43. [PMID: 23724903 PMCID: PMC4980761 DOI: 10.1146/annurev-genom-091212-153448] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Until the mid-nineteenth century, life expectancy at birth averaged 20 years worldwide, owing mostly to childhood fevers. The germ theory of diseases then gradually overcame the belief that diseases were intrinsic. However, around the turn of the twentieth century, asymptomatic infection was discovered to be much more common than clinical disease. Paradoxically, this observation barely challenged the newly developed notion that infectious diseases were fundamentally extrinsic. Moreover, interindividual variability in the course of infection was typically explained by the emerging immunological (or somatic) theory of infectious diseases, best illustrated by the impact of vaccination. This powerful explanation is, however, best applicable to reactivation and secondary infections, particularly in adults; it can less easily account for interindividual variability in the course of primary infection during childhood. Population and clinical geneticists soon proposed a complementary hypothesis, a germline genetic theory of infectious diseases. Over the past century, this idea has gained some support, particularly among clinicians and geneticists, but has also encountered resistance, particularly among microbiologists and immunologists. We present here the genetic theory of infectious diseases and briefly discuss its history and the challenges encountered during its emergence in the context of the apparently competing but actually complementary microbiological and immunological theories. We also illustrate its recent achievements by highlighting inborn errors of immunity underlying eight life-threatening infectious diseases of children and young adults. Finally, we consider the far-reaching biological and clinical implications of the ongoing human genetic dissection of severe infectious diseases.
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Affiliation(s)
- Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065;
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Pieper K, Grimbacher B, Eibel H. B-cell biology and development. J Allergy Clin Immunol 2013; 131:959-71. [PMID: 23465663 DOI: 10.1016/j.jaci.2013.01.046] [Citation(s) in RCA: 300] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 02/06/2023]
Abstract
B cells develop from hematopoietic precursor cells in an ordered maturation and selection process. Extensive studies with many different mouse mutants provided fundamental insights into this process. However, the characterization of genetic defects causing primary immunodeficiencies was essential in understanding human B-cell biology. Defects in pre-B-cell receptor components or in downstream signaling proteins, such as Bruton tyrosine kinase and B-cell linker protein, arrest development at the pre-B-cell stage. Defects in survival-regulating proteins, such as B-cell activator of the TNF-α family receptor (BAFF-R) or caspase recruitment domain-containing protein 11 (CARD11), interrupt maturation and prevent differentiation of transitional B cells into marginal zone and follicular B cells. Mature B-cell subsets, immune responses, and memory B-cell and plasma cell development are disturbed by mutations affecting Toll-like receptor signaling, B-cell antigen receptor coreceptors (eg, CD19), or enzymes responsible for immunoglobulin class-switch recombination. Transgenic mouse models helped to identify key regulatory mechanisms, such as receptor editing and clonal anergy, preventing the activation of B cells expressing antibodies recognizing autoantigens. Nevertheless, the combination of susceptible genetic backgrounds with the rescue of self-reactive B cells by T cells allows the generation of autoreactive clones found in patients with many autoimmune diseases and even in those with primary immunodeficiencies. The rapid progress of functional genomic research is expected to foster the development of new tools that specifically target dysfunctional B lymphocytes to treat autoimmunity, B-cell malignancies, and immunodeficiency.
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Affiliation(s)
- Kathrin Pieper
- Centre of Chronic Immunodeficiency, University Medical Centre Freiburg, Faculty of Biology, Albert-Ludwigs-Universität, Freiburg, Germany
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Chapel H, Lucas M, Patel S, Lee M, Cunningham-Rundles C, Resnick E, Gerard L, Oksenhendler E. Confirmation and improvement of criteria for clinical phenotyping in common variable immunodeficiency disorders in replicate cohorts. J Allergy Clin Immunol 2012; 130:1197-1198.e9. [PMID: 22819511 DOI: 10.1016/j.jaci.2012.05.046] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 05/18/2012] [Accepted: 05/21/2012] [Indexed: 10/28/2022]
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Bruton tyrosine kinase inhibition is a novel therapeutic strategy targeting tumor in the bone marrow microenvironment in multiple myeloma. Blood 2012; 120:1877-87. [PMID: 22689860 DOI: 10.1182/blood-2011-12-396853] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Bruton tyrosine kinase (Btk) has a well-defined role in B-cell development, whereas its expression in osteoclasts (OCs) further suggests a role in osteoclastogenesis. Here we investigated effects of PCI-32765, an oral and selective Btk inhibitor, on osteoclastogenesis as well as on multiple myeloma (MM) growth within the BM microenvironment. PCI-32765 blocked RANKL/M-CSF-induced phosphorylation of Btk and downstream PLC-γ2 in OCs, resulting in diminished TRAP5b (ED50 = 17 nM) and bone resorption activity. PCI-32765 also inhibited secretion of multiple cytokines and chemokines from OC and BM stromal cell cultures from both normal donors (ED50 = 0.5 nM) and MM patients. It decreased SDF-1-induced migration of MM cells, and down-regulated MIP1-α/CCL3 in MM cells. It also blocked MM cell growth and survival triggered by IL-6 or coculture with BM stromal cells or OCs in vitro. Importantly, PCI-32765 treatment significantly inhibits in vivo MM cell growth (P < .03) and MM cell-induced osteolysis of implanted human bone chips in SCID mice. Moreover, PCI-32765 prevents in vitro colony formation by stem-like cells from MM patients. Together, these results delineate functional sequelae of Btk activation mediating osteolysis and growth of MM cells, supporting evaluation of PCI-32765 as a novel therapeutic in MM.
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Conley ME, Dobbs AK, Quintana AM, Bosompem A, Wang YD, Coustan-Smith E, Smith AM, Perez EE, Murray PJ. Agammaglobulinemia and absent B lineage cells in a patient lacking the p85α subunit of PI3K. J Exp Med 2012; 209:463-70. [PMID: 22351933 PMCID: PMC3302225 DOI: 10.1084/jem.20112533] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 01/27/2012] [Indexed: 12/17/2022] Open
Abstract
Whole exome sequencing was used to determine the causative gene in patients with B cell defects of unknown etiology. A homozygous premature stop codon in exon 6 of PIK3R1 was identified in a young woman with colitis and absent B cells. The mutation results in the absence of p85α but normal expression of the p50α and p55α regulatory subunits of PI3K. Bone marrow aspirates from the patient showed <0.1% CD19(+) B cells with normal percentages of TdT(+)VpreB(+)CD19(-) B cell precursors. This developmental block is earlier than that seen in patients with defects in the B cell receptor signaling pathway or in a strain of engineered mice with a similar defect in p85α. The number and function of the patient's T cells were normal. However, Western blot showed markedly decreased p110δ, as well as absent p85α, in patient T cells, neutrophils, and dendritic cells. The patient had normal growth and development and normal fasting glucose and insulin. Mice with p85α deficiency have insulin hypersensitivity, defective platelet function, and abnormal mast cell development. In contrast, the absence of p85α in the patient results in an early and severe defect in B cell development but minimal findings in other organ systems.
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Affiliation(s)
- Mary Ellen Conley
- Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN 38163, USA.
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Khare A, Viswanathan B, Gund R, Jain N, Ravindran B, George A, Rath S, Bal V. Role of Bruton’s tyrosine kinase in macrophage apoptosis. Apoptosis 2010; 16:334-46. [DOI: 10.1007/s10495-010-0569-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ramalho VD, Oliveira Júnior EB, Tani SM, Roxo Júnior P, Vilela MMS. Mutations of Bruton's tyrosine kinase gene in Brazilian patients with X-linked agammaglobulinemia. Braz J Med Biol Res 2010; 43:910-3. [PMID: 20721470 DOI: 10.1590/s0100-879x2010007500079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Accepted: 07/28/2010] [Indexed: 11/21/2022] Open
Abstract
Mutations in Bruton's tyrosine kinase (BTK) gene are responsible for X-linked agammaglobulinemia (XLA), which is characterized by recurrent bacterial infections, profound hypogammaglobulinemia, and decreased numbers of mature B cells in peripheral blood. We evaluated 5 male Brazilian patients, ranging from 3 to 10 years of age, from unrelated families, whose diagnosis was based on recurrent infections, markedly reduced levels of IgM, IgG and IgA, and circulating B cell numbers <2%. BTK gene analysis was carried out using PCR-SSCP followed by sequencing. We detected three novel (Ala347fsX55, I355T, and Thr324fsX24) and two previously reported mutations (Q196X and E441X). Flow cytometry revealed a reduced expression of BTK protein in patients and a mosaic pattern of BTK expression was obtained from mothers, indicating that they were XLA carriers.
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Affiliation(s)
- V D Ramalho
- Centro de Investigação em Pediatria, Departamento de Pediatria, Universidade Estadual de Campinas, SP, Brasil
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Clinical consequences of defects in B-cell development. J Allergy Clin Immunol 2010; 125:778-87. [PMID: 20371392 DOI: 10.1016/j.jaci.2010.02.018] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 01/29/2010] [Accepted: 02/18/2010] [Indexed: 11/23/2022]
Abstract
Abnormalities in humoral immunity typically reflect a generalized or selective failure of effective B-cell development. The developmental processes can be followed through analysis of cell-surface markers, such as IgM, IgD, CD10, CD19, CD20, CD21, and CD38. Early phases of B-cell development are devoted to the creation of immunoglobulin and testing of B-cell antigen receptor signaling. Failure leads to the absence of B cells and immunoglobulin in the blood from birth. As the developing B cells begin to express a surface B-cell receptor, they become subject to negative and positive selection pressures and increasingly depend on survival signals. Defective signaling can lead to selective or generalized hypogammaglobulinemia, even in the presence of normal numbers of B cells. In the secondary lymphoid organs some B cells enter the splenic marginal zone, where preactivated cells lie ready to rapidly respond to T-independent antigens, such as the polysaccharides that coat some microorganisms. Other cells enter the follicle and, with the aid of cognate follicular T cells, divide to help form a germinal center (GC) after their interaction with antigen. In the GC B cells can undergo the processes of class switching and somatic hypermutation. Failure to properly receive T-cell signals can lead to hyper-IgM syndrome. B cells that leave the GC can develop into memory B cells, short-lived plasma cells, or long-lived plasma cells. The latter ultimately migrate back to the bone marrow, where they can continue to produce protective antigen-specific antibodies for decades.
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Targeting B-cells in Inflammatory Disease. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2010. [DOI: 10.1016/s0065-7743(10)45011-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
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Conley ME. Genetics of hypogammaglobulinemia: what do we really know? Curr Opin Immunol 2009; 21:466-71. [PMID: 19651503 DOI: 10.1016/j.coi.2009.07.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 07/03/2009] [Accepted: 07/03/2009] [Indexed: 11/19/2022]
Abstract
In the past, immunodeficiencies were categorized based on clinical and laboratory findings in the affected patient. Now we are more likely to define them based on the specific gene involved. One might expect this shift to increase the precision and clarity of diagnosis but in the last few years it has become increasingly clear that identification of a mutation in a specific gene may not tell the whole story. Some gene defects may reliably result in clinical disease, others may act as susceptibility factors that are more common in patients with immunodeficiency but can also be found in otherwise healthy individuals. Distinguishing between these two types of gene defects is essential for informative genetic counseling.
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Affiliation(s)
- Mary Ellen Conley
- Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN, USA.
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Tóth B, Volokha A, Mihas A, Pac M, Bernatowska E, Kondratenko I, Polyakov A, Erdos M, Pasic S, Bataneant M, Szaflarska A, Mironska K, Richter D, Stavrik K, Avcin T, Márton G, Nagy K, Dérfalvi B, Szolnoky M, Kalmár A, Belevtsev M, Guseva M, Rugina A, Kriván G, Timár L, Nyul Z, Mosdósi B, Kareva L, Peova S, Chernyshova L, Gherghina I, Serban M, Conley ME, Notarangelo LD, Smith CIE, van Dongen J, van der Burg M, Maródi L. Genetic and demographic features of X-linked agammaglobulinemia in Eastern and Central Europe: a cohort study. Mol Immunol 2009; 46:2140-6. [PMID: 19419768 DOI: 10.1016/j.molimm.2009.03.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2009] [Revised: 03/05/2009] [Accepted: 03/14/2009] [Indexed: 12/12/2022]
Abstract
Primary immunodeficiency disorders are a recognized public health problem worldwide. The prototype of these conditions is X-linked agammaglobulinemia (XLA) or Bruton's disease. XLA is caused by mutations in Bruton's tyrosine kinase gene (BTK), preventing B cell development and resulting in the almost total absence of serum immunoglobulins. The genetic profile and prevalence of XLA have not previously been studied in Eastern and Central European (ECE) countries. We studied the genetic and demographic features of XLA in Belarus, Croatia Hungary, Poland, Republic of Macedonia, Romania, Russia, Serbia, Slovenia, and Ukraine. We collected clinical, immunological, and genetic information for 122 patients from 109 families. The BTK gene was sequenced from the genomic DNA of patients with a high susceptibility to infection, almost no CD19(+) peripheral blood B cells, and low or undetectable levels of serum immunoglobulins M, G, and A, compatible with a clinical and immunological diagnosis of XLA. BTK sequence analysis revealed 98 different mutations, 46 of which are reported for the first time here. The mutations included single nucleotide changes in the coding exons (35 missense and 17 nonsense), 23 splicing defects, 13 small deletions, 7 large deletions, and 3 insertions. The mutations were scattered throughout the BTK gene and most frequently concerned the SH1 domain; no missense mutation was detected in the SH3 domain. The prevalence of XLA in ECE countries (total population 145,530,870) was found to be 1 per 1,399,000 individuals. This report provides the first comprehensive overview of the molecular genetic and demographic features of XLA in Eastern and Central Europe.
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Affiliation(s)
- Beáta Tóth
- Department of Infectious and Pediatric Immunology, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary
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Xu C, Xu B, Huang H, Huang X, Jin F. Preimplantation genetic diagnosis for X-linked agammaglobulinemia: a case report. Fertil Steril 2009; 91:1958.e5-7. [DOI: 10.1016/j.fertnstert.2009.01.093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Revised: 12/27/2008] [Accepted: 01/16/2009] [Indexed: 10/21/2022]
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Mohamed AJ, Yu L, Bäckesjö CM, Vargas L, Faryal R, Aints A, Christensson B, Berglöf A, Vihinen M, Nore BF, Smith CIE. Bruton's tyrosine kinase (Btk): function, regulation, and transformation with special emphasis on the PH domain. Immunol Rev 2009; 228:58-73. [PMID: 19290921 DOI: 10.1111/j.1600-065x.2008.00741.x] [Citation(s) in RCA: 350] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Bruton's agammaglobulinemia tyrosine kinase (Btk) is a cytoplasmic tyrosine kinase important in B-lymphocyte development, differentiation, and signaling. Btk is a member of the Tec family of kinases. Mutations in the Btk gene lead to X-linked agammaglobulinemia (XLA) in humans and X-linked immunodeficiency (Xid) in mice. Activation of Btk triggers a cascade of signaling events that culminates in the generation of calcium mobilization and fluxes, cytoskeletal rearrangements, and transcriptional regulation involving nuclear factor-kappaB (NF-kappaB) and nuclear factor of activated T cells (NFAT). In B cells, NF-kappaB was shown to bind to the Btk promoter and induce transcription, whereas the B-cell receptor-dependent NF-kappaB signaling pathway requires functional Btk. Moreover, Btk activation is tightly regulated by a plethora of other signaling proteins including protein kinase C (PKC), Sab/SH3BP5, and caveolin-1. For example, the prolyl isomerase Pin1 negatively regulates Btk by decreasing tyrosine phosphorylation and steady state levels of Btk. It is intriguing that PKC and Pin1, both of which are negative regulators, bind to the pleckstrin homology domain of Btk. To this end, we describe here novel mutations in the pleckstrin homology domain investigated for their transforming capacity. In particular, we show that the mutant D43R behaves similar to E41K, already known to possess such activity.
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Affiliation(s)
- Abdalla J Mohamed
- Clinical Research Center, Department of Laboratory Medicine, Karolinska Institutet, Huddinge University Hospital, Huddinge, Sweden
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