T-lymphocytes Archives - Revista Brasileira de Ginecologia e Obstetrícia
, , , Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2021;43(5):368-373
, , , To evaluate the antitumoral role of γδ TDC cells and αβ TDC cells in an experimental model of breast cancer.
Thirty female Balb/c mice were divided into 2 groups: control group (n=15) and induced-4T1 group (n=15), in which the mice received 2 x 105 4T1 mammary tumor cell line. Following the 28-day experimental period, immune cells were collected from the spleen and analyzed by flow cytometry for comparison of αβ TDC (TCRαβ+ CD11c+MHCII+) and γδ TDC (TCRγδ+CD11c+MHCII+) cells regarding surface markers (CD4+ and C8+) and cytokines (IFN-γ, TNF-α, IL-12 and IL-17).
A total of 26.53% of γδ TDC- control group (p<0.0001) - the proportion of αβ TDC was lower in splenic cells than γδ TDC; however, these 2 cell types were reduced in tumor conditions (p<0.0001), and the proportion of IFN-γ, TNF-α, IL-12 and IL-17 cytokines produced by γδ TDC was higher than those produced by αβ TDC, but it decreased under conditions of tumor-related immune system response (p<0.0001).
Healthy mice engrafted with malignant cells 4T1 breast tumor presented TDC with γδ TCR repertoire. These cells express cytotoxic molecules of lymphocytes T, producing anti-tumor proinflammatory cytokines.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2021;43(5):368-373
, , , To evaluate the antitumoral role of γδ TDC cells and αβ TDC cells in an experimental model of breast cancer.
Thirty female Balb/c mice were divided into 2 groups: control group (n=15) and induced-4T1 group (n=15), in which the mice received 2 x 105 4T1 mammary tumor cell line. Following the 28-day experimental period, immune cells were collected from the spleen and analyzed by flow cytometry for comparison of αβ TDC (TCRαβ+ CD11c+MHCII+) and γδ TDC (TCRγδ+CD11c+MHCII+) cells regarding surface markers (CD4+ and C8+) and cytokines (IFN-γ, TNF-α, IL-12 and IL-17).
A total of 26.53% of γδ TDC- control group (p<0.0001) - the proportion of αβ TDC was lower in splenic cells than γδ TDC; however, these 2 cell types were reduced in tumor conditions (p<0.0001), and the proportion of IFN-γ, TNF-α, IL-12 and IL-17 cytokines produced by γδ TDC was higher than those produced by αβ TDC, but it decreased under conditions of tumor-related immune system response (p<0.0001).
Healthy mice engrafted with malignant cells 4T1 breast tumor presented TDC with γδ TCR repertoire. These cells express cytotoxic molecules of lymphocytes T, producing anti-tumor proinflammatory cytokines.
, Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2019;41(4):213-219
, To describe the immunological and hematological reference intervals of low-risk pregnant women.
A cross-sectional retrospective database analysis of a basic and translational study analyzing the hematological evaluation blood counts and immunophenotyping of TCD3 + , TCD4 + , TCD8 + , B, and natural killer (NK) cells of the peripheral blood in 79 low-risk pregnant women and of 30 control women from the state of Pernambuco, Brazil, was performed.
No significant differences were detected between the hematological profiles of the 2nd and 3rd trimesters. Nevertheless, the median level of B cells decreased significantly in the 2nd (174 x 103 μL; p < 0.002) and 3rd trimesters (160 x 103 μL; p < 0.001), compared with the control group (296 x 103 μL). Similarly, the median level of NK cells was lower in the 2nd (134 x 103 μL; p < 0.0004) and 3rd trimesters (100 x 103 μL, p < 0.0004), compared with the control group (183 x 103 μL). In contrast, relative TCD4+ and TCD8+ levels increased in the 2nd and 3rd trimesters compared with the controls (TCD4 + : 2nd trimester = 59%; p < 0.001; 3rd trimester = 57%; p < 0.01; control = 50%; and TCD8 + : 2nd trimester = 31%; p < 0.001; 3rd trimester = 36%; p < 0.01; control = 24%).
Low-risk pregnant women have ~ 40% less B and NK cells in the peripheral blood, compared with non-pregnant women. These parameters may improve health assistance for mothers and contribute to define reference values for normal pregnancies.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2019;41(4):213-219
, To describe the immunological and hematological reference intervals of low-risk pregnant women.
A cross-sectional retrospective database analysis of a basic and translational study analyzing the hematological evaluation blood counts and immunophenotyping of TCD3 + , TCD4 + , TCD8 + , B, and natural killer (NK) cells of the peripheral blood in 79 low-risk pregnant women and of 30 control women from the state of Pernambuco, Brazil, was performed.
No significant differences were detected between the hematological profiles of the 2nd and 3rd trimesters. Nevertheless, the median level of B cells decreased significantly in the 2nd (174 x 103 μL; p < 0.002) and 3rd trimesters (160 x 103 μL; p < 0.001), compared with the control group (296 x 103 μL). Similarly, the median level of NK cells was lower in the 2nd (134 x 103 μL; p < 0.0004) and 3rd trimesters (100 x 103 μL, p < 0.0004), compared with the control group (183 x 103 μL). In contrast, relative TCD4+ and TCD8+ levels increased in the 2nd and 3rd trimesters compared with the controls (TCD4 + : 2nd trimester = 59%; p < 0.001; 3rd trimester = 57%; p < 0.01; control = 50%; and TCD8 + : 2nd trimester = 31%; p < 0.001; 3rd trimester = 36%; p < 0.01; control = 24%).
Low-risk pregnant women have ~ 40% less B and NK cells in the peripheral blood, compared with non-pregnant women. These parameters may improve health assistance for mothers and contribute to define reference values for normal pregnancies.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2005;27(7):393-400
DOI 10.1590/S0100-72032005000700005
PURPOSE: to evaluate T cell proliferation and cytokine production in HIV-1-infected pregnant women and their impact on in vitro virus replication. METHODS: peripheral blood from 12 HIV-1-infected pregnant women and from their neonates was collected. As control, 10 samples from non-infected pregnants were also colleted. The CD4+ and CD8+ T cell counts were assayed by flow cytometry. Peripheral blood mononuclear cells (PBMC) and plasma were obtained by centrifugation with and without Ficoll-Hypaque gradient, respectively. The freshly purified PBMC were kept in cultures for seven days with PHA plus r-IL-2, and the lymphoproliferative response was assayed by Trypan blue dye exclusion. In some experiments we added anti-IL-10 monoclonal antibody. The plasma samples and supernatants from cell cultures were stored to determine both peripheral cytokine levels, by ELISA sandwich, and viral load, by RT-PCR. RESULTS: the results showed that the lymphoproliferative response was smaller in cultures obtained from HIV-1-infected women than in control cultures [4.2±0.37 vs 2.4±0.56 (x 10(6) cell/mL), p<0.005]. In both control and infected pregnant women who had low plasma viral load, the level of IL-10 was higher than in those with high viral replication (9.790±3.224 vs 1.256±350 pg/mL, p=0.002). The elevated TNF-alpha production detected in serum (7.200±2.440 pg/mL) and supernatants (21.350±15.230 pg/mL) was associated with higher plasma viral loads and vertical infection. The IL-10 blockade by anti-IL-10 antibodies augmented viral replication in the cell cultures. CONCLUSION: these results indicate that IL-10 production exerts a negative influence on virus replication, diminishing the probability of intrauterine HIV-1 infection.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2005;27(7):393-400
DOI 10.1590/S0100-72032005000700005
PURPOSE: to evaluate T cell proliferation and cytokine production in HIV-1-infected pregnant women and their impact on in vitro virus replication. METHODS: peripheral blood from 12 HIV-1-infected pregnant women and from their neonates was collected. As control, 10 samples from non-infected pregnants were also colleted. The CD4+ and CD8+ T cell counts were assayed by flow cytometry. Peripheral blood mononuclear cells (PBMC) and plasma were obtained by centrifugation with and without Ficoll-Hypaque gradient, respectively. The freshly purified PBMC were kept in cultures for seven days with PHA plus r-IL-2, and the lymphoproliferative response was assayed by Trypan blue dye exclusion. In some experiments we added anti-IL-10 monoclonal antibody. The plasma samples and supernatants from cell cultures were stored to determine both peripheral cytokine levels, by ELISA sandwich, and viral load, by RT-PCR. RESULTS: the results showed that the lymphoproliferative response was smaller in cultures obtained from HIV-1-infected women than in control cultures [4.2±0.37 vs 2.4±0.56 (x 10(6) cell/mL), p<0.005]. In both control and infected pregnant women who had low plasma viral load, the level of IL-10 was higher than in those with high viral replication (9.790±3.224 vs 1.256±350 pg/mL, p=0.002). The elevated TNF-alpha production detected in serum (7.200±2.440 pg/mL) and supernatants (21.350±15.230 pg/mL) was associated with higher plasma viral loads and vertical infection. The IL-10 blockade by anti-IL-10 antibodies augmented viral replication in the cell cultures. CONCLUSION: these results indicate that IL-10 production exerts a negative influence on virus replication, diminishing the probability of intrauterine HIV-1 infection.
