Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2
| العنوان: | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
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| المؤلفون: | Michel van Houdt, Ina Schim van der Loeff, Hans Janssen, Anton T.J. Tool, Evelien G. G. Sprenkeler, Taco W. Kuijpers, Mario Abinun, Karin R. Engelhardt, Angela Grainger, Sophie Hambleton |
| المساهمون: | Graduate School, AII - Inflammatory diseases, Paediatric Infectious Diseases / Rheumatology / Immunology, Amsterdam Reproduction & Development (AR&D) |
| المصدر: | The Journal of Allergy and Clinical Immunology Journal of allergy and clinical immunology, 147(6), 2381-2385.e2. Mosby Inc. Journal of Allergy and Clinical Immunology |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Cytotoxicity, Immunologic, 0301 basic medicine, Chromosomal Proteins, Non-Histone, Neutrophils, medicine.medical_treatment, CD34, Hematopoietic stem cell transplantation, 0302 clinical medicine, inborn error of immunity, Immunology and Allergy, chemotaxis, Respiratory Burst, CEBPε, CCAAT-enhancer-binding protein ε, CEBPε, biology, Brief Report, Homozygote, neutrophil-specific granule deficiency, Cell Differentiation, SMARCD2, SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily D, member 2, Pedigree, 3. Good health, lactoferrin, Chemotaxis, Leukocyte, Haematopoiesis, Phenotype, medicine.anatomical_structure, 030220 oncology & carcinogenesis, Myeloperoxidase, Female, Myelopoiesis, Immunology, Granulopoiesis, Immunophenotyping, Sepsis, 03 medical and health sciences, medicine, Humans, SGD, Specific granule deficiency, Genetic Predisposition to Disease, business.industry, Infant, Newborn, NADPH Oxidases, medicine.disease, 030104 developmental biology, phagocyte disorder, Mutation, biology.protein, RNA Splice Sites, Bone marrow, business, Splice-site mutation, Biomarkers, Leukocyte Disorders |
| الوصف: | Background SMARCD2 (SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily D, member 2) has recently been shown to have a critical role in granulopoiesis in humans, mice, and zebrafish. Our patient presented with delayed cord separation, failure to thrive, and sepsis. Retrospective whole-exome sequencing confirmed a homozygous splice-site mutation in SMARCD2. Objective We sought to provide the second description of human SMARCD2 deficiency and the first functional analysis of human primary SMARCD2-deficient cells. Methods Heparinized venous blood and bone marrow were collected from the patient after obtaining informed consent. Patient leukocytes and CD34+ cells were then isolated, phenotyped, and assessed functionally. Results Circulating neutrophils appeared phenotypically immature, lacking multilobed nuclei, and neutrophil granules lacked lactoferrin but showed normal levels of myeloperoxidase. Neutrophil oxidative burst was preserved in response to phorbol 12-myristate 13-acetate. Patient bone marrow–derived neutrophils and white blood cells showed a severely impaired chemotactic response. Furthermore, white blood cells showed defective in vitro killing of Staphylococcus aureus, consistent with a specific granule deficiency. Finally, patient bone marrow–derived CD34+ cells showed markedly impaired in vitro expansion and differentiation toward the neutrophil lineage. Before her molecular diagnosis, our patient underwent hematopoietic stem cell transplantation and is well 8 years later. Conclusions This report highlights an important role for SMARCD2 in human myelopoiesis and the curative effect of hematopoietic stem cell transplantation for the hematopoietic features of SMARCD2 deficiency. |
| اللغة: | English |
| تدمد: | 0091-6749 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac05ce09b1371fefa175acc3798493faTest https://doi.org/10.1016/j.jaci.2020.11.025Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....ac05ce09b1371fefa175acc3798493fa |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00916749 |
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