Characterization of the impairment of the uptake of apoptotic polymorphonuclear cells by monocyte subpopulations in systemic lupus erythematosus
| Autor: | Bogdan Batko, Grzegorz Osmenda, M Krezelok, Juliusz Pryjma, Dominik Skiba, Tomasz Mikolajczyk, Grzegorz Wilk, Tomasz J. Guzik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Adult
Lipopolysaccharides Male Neutrophils Phagocytosis medicine.medical_treatment T cell Lipopolysaccharide Receptors Apoptosis Inflammation CD16 Peripheral blood mononuclear cell Monocytes Young Adult Rheumatology Antigens CD immune system diseases medicine Humans Lupus Erythematosus Systemic skin and connective tissue diseases Hepatitis A Virus Cellular Receptor 2 Tumor Necrosis Factor-alpha business.industry Monocyte Receptors IgG Membrane Proteins Middle Aged Interleukin-10 medicine.anatomical_structure Cytokine Case-Control Studies Immunology Leukocytes Mononuclear Receptors Complement 3b Female Tumor necrosis factor alpha medicine.symptom business Low Density Lipoprotein Receptor-Related Protein-1 |
| Popis: | Efficient removal of apoptotic polymorphonuclear leukocytes (PMNs) is an important step in the resolution of inflammation, which protects tissues from the noxious contents of dying cells. While the impairment of apoptotic PMNs removal has been demonstrated for macrophages in systemic lupus erythematosus (SLE), recent studies show that monocytes are also capable of such phagocytosis, although their involvement in SLE is not clear. Therefore, we characterized phagocytosis of apoptotic PMNs by monocytes in 22 patients with SLE and 22 healthy controls. Using flow cytometry we demonstrate that in SLE peripheral blood monocytes show impaired phagocytosis of autologous apoptotic PMNs, while they efficiently engulf apoptotic PMNs isolated from healthy subjects. Monocytes CD14highCD16+ and CD14dimCD16+ more efficiently interacted with apoptotic neutrophils than CD16– cells both in SLE and healthy subjects. Monocytes in SLE showed modestly decreased expression of CD35 and CD91 and increased expression of T Cell Ig- and mucin-domain-containing molecule-3 (TIM-3); however, these differences were evident mainly in selected subsets of monocytes (CD16+) while defects in phagocytosis were observed in all monocyte subsets. Apoptotic cell-dependent induction of lipopolysaccharide (LPS) stimulated production of anti-inflammatory cytokine IL-10 by peripheral blood mononuclear cells (PBMC) was blunted in SLE while the production of pro-inflammatory cytokine TNF-α was unchanged. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|