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2016 ; 33
(2
): 153-5
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?diyopatik Trombositopenik Purpura Olgular?nda Düzenleyici T Hücreler
#MMPMID27211045
Akyol Erikçi A
; Karagöz B
; Bilgi O
Turk J Haematol
2016[Jun]; 33
(2
): 153-5
PMID27211045
show ga
OBJECTIVE: Immune thrombocytopenic purpura (ITP) is an immune-mediated bleeding
disorder in which platelets are opsonized by autoantibodies and destroyed by an
Fc receptor-mediated phagocytosis by the reticuloendothelial system within the
spleen. Autoimmune processes are also considered in the pathogenesis of this
disorder. CD4+CD25+FoxP3+ regulatory T (Treg) cells and CD8+CD28- Treg cells have
roles in autoimmune diseases. We investigated these regulatory cells in ITP
patients. MATERIALS AND METHODS: We included 22 ITP patients and 16 age-matched
healthy subjects. CD4+CD25+FoxP3+ Treg cells and CD8+CD28- cells were
investigated by three-color flow cytometry. The ratios of these cell populations
to total lymphocytes were calculated. Statistical analysis was carried out with
the Mann-Whitney U test. RESULTS: CD4+CD25+ Treg cells were 9.69±3.70% and
12.99±5.58% in patients with ITP and controls, respectively. CD4+CD25highFoxP3+
cells were 27.72±19.74% and 27.55±23.98% in ITP patients and controls,
respectively. The percentages of both of these cell types were not statistically
significant when compared to the control group. CONCLUSION: We did not find any
differences in ratios of CD4+CD25+FoxP3+ Treg cells or CD8+CD28- T cells in
lymphocytes between patients and healthy subjects. We conclude that these
circulatory cells are not different in ITP, but further studies are needed to
explore the putative roles of these regulatory cells.