1. Elevated Numbers of Circulating Very Small Embryonic-Like Stem Cells (VSELs) and Intermediate CD14++CD16+ Monocytes in IgA Nephropathy
- Author
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Urszula Radzikowska, Beata Naumnik, Kamil Grubczak, Andrzej Eljaszewicz, Katarzyna Kleina, Marcin Moniuszko, Paulina Kaczmarczyk, Karolina Dworzanczyk, Marlena Tynecka, and Paula Zembko
- Subjects
Ang-1 ,0301 basic medicine ,Cancer Research ,Stromal cell ,Ang-2 ,Lipopolysaccharide Receptors ,sCD163 ,Antigens, Differentiation, Myelomonocytic ,Receptors, Cell Surface ,Biology ,urologic and male genital diseases ,Article ,Monocytes ,SDF-1 ,03 medical and health sciences ,Glomerulonephritis ,0302 clinical medicine ,Antigens, CD ,HSCs ,medicine ,Humans ,Regeneration ,Macrophage ,Progenitor cell ,Embryonic Stem Cells ,Endothelial Progenitor Cells ,Monocyte ,Receptors, IgG ,Glomerulonephritis, IGA ,IgA nephropathy ,Cell Biology ,Hematopoietic Stem Cells ,Embryonic stem cell ,Chemokine CXCL12 ,Immunoglobulin A ,Haematopoiesis ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,VSELs ,EPCs ,Immunology ,Peripheral Blood Stem Cells ,Stem cell ,CD163 - Abstract
IgA nephropathy (IgAN) is recognized as most frequent form of primary glomerulonephritis worldwide. IgAN is associated with renal degradation occurring due to irreversible pathological changes leading to glomerulosclerosis and interstitial fibrosis. It remains poorly understood whether and to what extent these changes are followed by the activation of regenerative mechanisms. Therefore, in this study we aimed to evaluate regenerative potential of IgAN patients by quantitating the frequencies of several stem cell types, namely circulating very small embryonic-like stem cells (VSELs), hematopoietic stem cells (HSCs), endothelial progenitor cells (EPCs) as well as different monocyte subsets with varying maturation and angiopoietic potential. Moreover, we analyzed whether changes in stem cell and monocyte frequencies were related to alterations of several chemotactic factors (stromal derived-factor (SDF-1), angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2)) and a marker of monocyte/macrophage activation, namely soluble form of CD163 receptor (sCD163). We showed that IgAN patients presented with enhanced levels of VSELs, but not other stem cell types. We also demonstrated significantly elevated numbers of intermediate monocytes known for their M2-like properties as well as high angiopoietic potential and CD163 expression. This finding was accompanied by detection of elevated sCD163 plasma levels in IgAN patients. Taking together, we demonstrated here that IgAN is associated with selective mobilization of VSELs and increased maturation of monocytes towards M2-like and angiopoietic phenotype. These findings contribute to better understanding of the role of regenerative mechanisms in the pathogenesis of chronic inflammation in the course of IgAN.
- Published
- 2018
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