Nejvíce citovaný článek - PubMed ID 16818678
These guidelines are a consensus work of a considerable number of members of the immunology and flow cytometry community. They provide the theory and key practical aspects of flow cytometry enabling immunologists to avoid the common errors that often undermine immunological data. Notably, there are comprehensive sections of all major immune cell types with helpful Tables detailing phenotypes in murine and human cells. The latest flow cytometry techniques and applications are also described, featuring examples of the data that can be generated and, importantly, how the data can be analysed. Furthermore, there are sections detailing tips, tricks and pitfalls to avoid, all written and peer-reviewed by leading experts in the field, making this an essential research companion.
INTRODUCTION: Previous studies showed that several lymphocyte abnormalities seen in the most frequent symptomatic immunoglobulin deficiency, common variable immunodeficiency (CVID), were also observed in a genetically related asymptomatic disorder - selective IgA deficiency (IgAD). In this study we searched for abnormalities in the differentiation stages of T cells as well as for similarities of these abnormalities in CVID and IgAD patients. MATERIAL AND METHODS: Using flow cytometry in 80 patients with IgAD, 48 patients with CVID, and 80 control persons we determined T-lymphocyte subsets: both CD4 and CD8 were divided into the naïve CD45RO-CD27+, early differentiated CD45RO+CD27+, late differentiated CD45RO+CD27- and fully differentiated effector CD45RO-CD27- memory T cells, as well as Treg cells, defined as CD4+CD25highCD127low T cells. RESULTS: An increase of CD4+ and CD8+ late differentiated memory cells was observed comparing CVID patients to controls, as well as comparing IgAD patients to controls. In CVID patients an increase of CD4+ early differentiated memory cells, a decrease of CD8+ intermediate memory cells, and CD4+ and CD8+ naïve cells were found as well. The abnormalities in IgAD patients might be explained by higher CMV seropositivity observed in our IgAD. We confirmed the repeatedly published decrease of Treg cells in CVID patients, while Treg cells in IgAD patients were increased compared to controls. CONCLUSIONS: Our results show T-cell activation not only in CVID, but also in IgAD patients. The increase in IgAD patients may be influenced by a more frequent CMV infection in our group of IgAD patients.
- Klíčová slova
- CMV, IgA deficiency, T-lymphocyte subpopulations, common variable immunodeficiency,
- Publikační typ
- časopisecké články MeSH
- MeSH
- DNA analýza MeSH
- falešně pozitivní reakce MeSH
- imunofenotypizace MeSH
- imunologické techniky * MeSH
- lidé MeSH
- proliferace buněk MeSH
- průtoková cytometrie MeSH
- řízení kvality MeSH
- RNA analýza MeSH
- separace buněk MeSH
- směrnice jako téma * MeSH
- software MeSH
- T-lymfocyty cytologie MeSH
- výzkumný projekt MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
- Názvy látek
- DNA MeSH
- RNA MeSH
Allergy is one of the most common diseases with constantly increasing incidence. The identification of prognostic markers pointing to increased risk of allergy development is of importance. Cord blood represents a suitable source of cells for searching for such prognostic markers. In our previous work, we described the increased reactivity of cord blood cells of newborns of allergic mothers in comparison to newborns of healthy mothers, which raised the question of whether or not this was due to the impaired function of regulatory T cells (T(regs)) in high-risk children. Therefore, the proportion and functional properties of T(regs) in cord blood of children of healthy and allergic mothers were estimated by flow cytometry. The proportion of T(regs) [CD4(+)CD25(high)CD127(low) forkhead box protein 3 (FoxP3(+))] in cord blood of children of allergic mothers tends to be higher while, in contrast, the median of fluorescence intensity of FoxP3 was increased significantly in the healthy group. Intracellular presence of regulatory cytokines interleukin (IL)-10 and transforming growth factor (TGF)-beta was also higher in T(regs) of children of healthy mothers. Although we detected an increased proportion of T(regs) in cord blood of children of allergic mothers, the functional indicators (intracellular presence of regulatory cytokines IL-10 and TGF-beta, median of fluorescence intensity of FoxP3) of those T(regs) were lower in comparison to the healthy group. We can conclude that impaired function of T(regs) in cord blood of children of allergic mothers could be compensated partially by their increased number. Insufficient function of T(regs) could facilitate allergen sensitization in high-risk individuals after subsequent allergen encounter.
- MeSH
- alergie krev imunologie MeSH
- antigeny CD4 metabolismus MeSH
- fetální krev cytologie imunologie metabolismus MeSH
- forkhead transkripční faktory imunologie metabolismus MeSH
- interleukin-10 krev metabolismus MeSH
- lidé MeSH
- novorozenec MeSH
- průtoková cytometrie MeSH
- receptor interleukinu-2 - alfa-podjednotka metabolismus MeSH
- receptor interleukinu-7 - alfa-podjednotka metabolismus MeSH
- regulační T-lymfocyty imunologie metabolismus MeSH
- studie případů a kontrol MeSH
- těhotenství MeSH
- transformující růstový faktor beta krev metabolismus MeSH
- Check Tag
- lidé MeSH
- novorozenec MeSH
- těhotenství MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- antigeny CD4 MeSH
- forkhead transkripční faktory MeSH
- FOXP3 protein, human MeSH Prohlížeč
- IL2RA protein, human MeSH Prohlížeč
- interleukin-10 MeSH
- receptor interleukinu-2 - alfa-podjednotka MeSH
- receptor interleukinu-7 - alfa-podjednotka MeSH
- transformující růstový faktor beta MeSH
