scholarly journals Characteristics of Regulatory T cells

2016 ◽  
Vol 85 (4) ◽  
pp. 323-326
Author(s):  
Magdalena Frydrychowicz ◽  
Maciej Boruczkowski ◽  
Agata Kolecka-Bednarczyk ◽  
Renata Jenek ◽  
Joanna Rosołowska ◽  
...  
Keyword(s):  
Immune Response ◽  
T Cells ◽  
Regulatory T Cells ◽  
Adhesion Molecules ◽  
Chemokine Receptors ◽  
Toll Like Receptors ◽  
Effector Cells

Regulatory T cells (Tregs) is heterogenic subpopulation of T cells that is able to suppress function of effector cells during the immune response. Among them are natural (nTreg) and induced Treg (Tr1, Th3, CD4+CD25-). CD25, CD45Ro, CD152, GITR, LAG-3, several adhesion molecules, chemokine receptors as well as Toll-like receptors are present on the surface of Treg. Mechanism of suppression used by nTreg is not completely understood.

Characteristics of Regulatory T cells

10.20883/175 ◽  
2016 ◽  
Vol 85 (4) ◽  
pp. 323
Author(s):  
Magdalena Frydrychowicz ◽  
Maciej Boruczkowski ◽  
Agata Kolecka-Bednarczyk ◽  
Renata Jenek ◽  
Joanna Rosołowska ◽  
...  
Keyword(s):  
Immune Response ◽  
T Cells ◽  
Regulatory T Cells ◽  
Adhesion Molecules ◽  
Chemokine Receptors ◽  
Toll Like Receptors ◽  
Effector Cells

Regulatory T cells (Tregs) is heterogenic subpopulation of T cells that is able to suppress function of effector cells during the immune response. Among them are natural (nTreg) and induced Treg (Tr1, Th3, CD4+CD25-). CD25, CD45Ro, CD152, GITR, LAG-3, several adhesion molecules, chemokine receptors as well as Toll-like receptors are present on the surface of Treg. Mechanism of suppression used by nTreg is not completely understood.

scholarly journals Phenotypical and Functional Characteristics of Human Regulatory T Cells during Ex Vivo Maturation from CD4+ T Lymphocytes

2021 ◽  
Vol 11 (13) ◽  
pp. 5776
Author(s):  
Varvara G. Blinova ◽  
Natalia S. Novachly ◽  
Sofya N. Gippius ◽  
Abdullah Hilal ◽  
Yulia A. Gladilina ◽  
...  
Keyword(s):  
T Cells ◽  
Regulatory T Cells ◽  
Ex Vivo ◽  
Pcr Analysis ◽  
Mrna Levels ◽  
Rt Pcr ◽  
Inflammatory Reactions ◽  
Effector Cells ◽  
Cycle Regulation ◽  
Further Development

Regulatory T cells (Tregs) participate in the negative regulation of inflammatory reactions by suppressing effector cells. In a number of autoimmune disorders, the suppressive function and/or the number of Tregs is compromised. The lack of active functioning Tregs can be restored with adoptive transfer of expanded ex vivo autologous Tregs. In our study, we traced the differentiation and maturation of Tregs CD4+CD25+FoxP3+CD127low over 7 days of cultivation from initial CD4+ T cells under ex vivo conditions. The resulting ex vivo expanded cell population (eTregs) demonstrated the immune profile of Tregs with an increased capacity to suppress the proliferation of target effector cells. The expression of the FoxP3 gene was upregulated within the time of expansion and was associated with gradual demethylation in the promotor region of the T cell-specific demethylation region. Real-time RT-PCR analysis revealed changes in the expression profile of genes involved in cell cycle regulation. In addition to FOXP3, the cells displayed elevated mRNA levels of Ikaros zinc finger transcription factors and the main telomerase catalytic subunit hTERT. Alternative splicing of FoxP3, hTERT and IKZF family members was demonstrated to be involved in eTreg maturation. Our data indicate that expanded ex vivo eTregs develop a Treg-specific phenotype and functional suppressive activity. We suggest that eTregs are not just expanded but transformed cells with enhanced capacities of immune suppression. Our findings may influence further development of cell immunosuppressive therapy based on regulatory T cells.

In Vivo-Generated Antigen-Specific Regulatory T Cells Treat Autoimmunity Without Compromising Antibacterial Immune Response

2014 ◽  
Vol 6 (241) ◽  
pp. 241ra78-241ra78 ◽  
Author(s):  
S. Kasagi ◽  
P. Zhang ◽  
L. Che ◽  
B. Abbatiello ◽  
T. Maruyama ◽  
...  
Keyword(s):  
Immune Response ◽  
T Cells ◽  
Regulatory T Cells

Analysis of regulatory T cells and CTLA-4 expression in pregnant women according to seropositivity to Toxoplasma gondii

Parasitology ◽  
2020 ◽  
Vol 147 (7) ◽  
pp. 810-815
Author(s):  
Karine Rezende-Oliveira ◽  
César Gómez-Hernández ◽  
Marcos Vinicius da Silva ◽  
Fernanda Rodrigues Helmo ◽  
Virmondes Rodrigues
Keyword(s):  
Immune Response ◽  
T Cells ◽  
Toxoplasma Gondii ◽  
Regulatory T Cells ◽  
Pregnant Women ◽  
Positive Serology ◽  
Surface Molecules

AbstractPregnancy is considered a period in which immunomodulation occurs, although it is important for the maintenance of the foetus, could contribute to infections as Toxoplasma gondii. Immune response cells such as regulatory T cells participate in this immunomodulation, and surface molecules such as CTLA-4 develop an immunosuppressive role, could contribute to the establishment of the parasite. This study aimed to evaluate the presence of regulatory T cells and the expression of CTLA-4 in parturient and non-pregnant seropositive and seronegative for anti-T. gondii antibodies. Sixty-two participants were evaluated, 14 parturient with negative serology, 23 parturient with positive serology, 16 non-pregnant women seronegative and 9 non-pregnant women seropositive. Immunophenotyping was performed for characterize TCD4+Foxp3+ cells, T CD4+CD25-Foxp3+, TCD4+CD25highFoxp3+, TCD4+CTLA-4+, TCD4+CD25-CTLA-4+ and TCD4+CD25highCTLA-4+. We observed a lower level of CD4+CD25highFoxp3+ cells from seropositive parturient compared with seropositive non-pregnant cells. Significative levels of CD4+CD25-Foxp3+ cells from seronegative pregnant were observed compared with seropositive pregnant cells. Furthermore, the higher level of CD4+CD25-CTLA-4+ cells populations was detected in seropositive pregnant cells compared with seropositive non-pregnant. Although a significant increase in CTLA-4 cells was observed in pregnant women positive for anti-T. gondii antibodies, this increase did not cause a risk of reactivation of the infection.

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