Abstract
Background
Systemic inflammatory and autoimmune diseases (SIADs) occur in 10–20% of patients with myelodysplastic syndrome (MDS). Recently identified VEXAS (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic) syndrome, associated with somatic mutations in UBA1 (Ubiquitin-like modifier-activating enzyme 1), encompasses a range of severe inflammatory conditions along with hematological abnormalities, including MDS. The pathophysiological mechanisms underlying the association between MDS and SIADs remain largely unknown, especially the roles of different myeloid immune cell subsets. The aim of this study was to quantitatively evaluate peripheral blood myeloid immune cells (dendritic cells (DC) and monocytes) by flow cytometry in MDS patients with associated SIAD (n = 14, most often including relapsing polychondritis or neutrophilic dermatoses) and to compare their distribution in MDS patients without SIAD (n = 23) and healthy controls (n = 7). Most MDS and MDS/SIAD patients had low-risk MDS. Eight of 14 (57%) MDS/SIAD patients carried UBA1 somatic mutations, defining VEXAS syndrome.Compared with MDS patients, most DC and monocyte subsets were significantly decreased in MDS/SIAD patients, especially in MDS patients with VEXAS syndrome. Our study provides the first overview of the peripheral blood immune myeloid cell distribution in MDS patients with associated SIADs and raises several hypotheses: possible redistribution to inflammation sites, increased apoptosis, or impaired development in the bone marrow.
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Abbreviations
- AML:
-
Acute myeloid leukemia
- ANSM:
-
Agence Nationale de Sécurité du Médicament
- AZA:
-
Azacitidine
- CD:
-
Cluster of differentiation
- cDC:
-
Conventional myeloid dendritic cells
- cDC1:
-
Conventional myeloid dendritic cells 1
- cDC2:
-
Conventional myeloid dendritic cells 2
- CMML:
-
Chronic myelomonocytic leukemia
- cMo:
-
Classical monocytes
- DC:
-
Dendritic cells
- EDTA:
-
Ethylenediaminetetraacetic acid
- PBMC:
-
Peripheral blood mononuclear cells
- GFM:
-
Groupe Francophone des Myélodysplasies
- IPSS:
-
International prognostic scoring system
- MDS:
-
Myelodysplastic syndrome
- MINHEMON:
-
French Network of dysimmune disorders associated with hemopathies
- Mo:
-
Monocytes
- ncMo:
-
Nonclassical monocytes
- iMo:
-
Intermediate monocytes
- pDC:
-
Plasmacytoid dendritic cells
- R-IPSS:
-
Revised international prognostic scoring system
- SD:
-
Standard deviation
- SIAD:
-
Systemic inflammatory and autoimmune disease
- slan Mo:
-
Slan + nonclassical monocytes.
- slanDC:
-
6-Sulfo LacNAc dendritic cells
- SLE:
-
Systemic lupus erythematosus
- UBA1:
-
Ubiquitin-like modifier-activating enzyme 1
- UBA1-WT:
-
Wild-type UBA1
- VEXAS:
-
Vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic
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Acknowledgements
We thank Frédéric de Vassoigne for his help in collecting patient samples (Tumorothèque Saint-Antoine, APHP, Hôpital Saint-Antoine, Paris, France).
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AM is investigator of CELGENE, ROCHE, CHUGAI founded trials with APHP and Hopital 15–20 promotion; AM received several fees for congress travels and experts’ use from LFB, SANOFI, SHIRE, and CELGENE. The other authors declare no conflict of interest.
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All participants provided written informed consent. The study was approved by the local institutional review board (EudraCT 2016-000918-30, ANSM (Agence Nationale de Sécurité du Médicament) 160580A-11, registration date 26-AUG-2016) and in accordance with the Declaration of Helsinki.
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Jachiet, V., Ricard, L., Hirsch, P. et al. Reduced peripheral blood dendritic cell and monocyte subsets in MDS patients with systemic inflammatory or dysimmune diseases. Clin Exp Med 23, 803–813 (2023). https://doi.org/10.1007/s10238-022-00866-5
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DOI: https://doi.org/10.1007/s10238-022-00866-5