Cargando…
Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2
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....
Autores principales: | , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Mosby
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8168953/ https://www.ncbi.nlm.nih.gov/pubmed/33279574 http://dx.doi.org/10.1016/j.jaci.2020.11.025 |
_version_ | 1783701961224224768 |
---|---|
author | Schim van der Loeff, Ina Sprenkeler, Evelien G.G. Tool, Anton T.J. Abinun, Mario Grainger, Angela Engelhardt, Karin R. van Houdt, Michel Janssen, Hans Kuijpers, Taco W. Hambleton, Sophie |
author_facet | Schim van der Loeff, Ina Sprenkeler, Evelien G.G. Tool, Anton T.J. Abinun, Mario Grainger, Angela Engelhardt, Karin R. van Houdt, Michel Janssen, Hans Kuijpers, Taco W. Hambleton, Sophie |
author_sort | Schim van der Loeff, Ina |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-8168953 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Mosby |
record_format | MEDLINE/PubMed |
spelling | pubmed-81689532021-06-05 Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 Schim van der Loeff, Ina Sprenkeler, Evelien G.G. Tool, Anton T.J. Abinun, Mario Grainger, Angela Engelhardt, Karin R. van Houdt, Michel Janssen, Hans Kuijpers, Taco W. Hambleton, Sophie J Allergy Clin Immunol Brief Report 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. Mosby 2021-06 /pmc/articles/PMC8168953/ /pubmed/33279574 http://dx.doi.org/10.1016/j.jaci.2020.11.025 Text en © 2020 The Authors https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Brief Report Schim van der Loeff, Ina Sprenkeler, Evelien G.G. Tool, Anton T.J. Abinun, Mario Grainger, Angela Engelhardt, Karin R. van Houdt, Michel Janssen, Hans Kuijpers, Taco W. Hambleton, Sophie Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title_full | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title_fullStr | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title_full_unstemmed | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title_short | Defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in SMARCD2 |
title_sort | defective neutrophil development and specific granule deficiency caused by a homozygous splice-site mutation in smarcd2 |
topic | Brief Report |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8168953/ https://www.ncbi.nlm.nih.gov/pubmed/33279574 http://dx.doi.org/10.1016/j.jaci.2020.11.025 |
work_keys_str_mv | AT schimvanderloeffina defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT sprenkelereveliengg defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT toolantontj defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT abinunmario defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT graingerangela defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT engelhardtkarinr defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT vanhoudtmichel defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT janssenhans defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT kuijperstacow defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 AT hambletonsophie defectiveneutrophildevelopmentandspecificgranuledeficiencycausedbyahomozygoussplicesitemutationinsmarcd2 |