Articles: regulatory-t-lymphocytes.
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Autoimmune responses mediated by cluster of differentiation 4(+) T cells may contribute to the development of chronic obstructive pulmonary disease (COPD). However, little is known about the frequency of peripheral blood Th17 cells and of regulatory T cells (Tregs) in Chinese patients with COPD. This study is aimed at determining the frequency of circulating Th17 and Tregs in patients with moderate and severe COPD, heavy smokers and healthy controls (HC). ⋯ An imbalance of circulating Th17 cells and Tregs is associated with the deterioration of pulmonary function in patients with moderate and severe COPD.
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Proc. Natl. Acad. Sci. U.S.A. · Jun 2015
Sialyl Lewis x (CD15s) identifies highly differentiated and most suppressive FOXP3high regulatory T cells in humans.
CD4(+) regulatory T (Treg) cells expressing CD25 and the transcription factor forkhead box P3 (FOXP3) are indispensable for immunological self-tolerance and homeostasis. FOXP3(+)CD25(+)CD4(+) T cells in humans, however, are heterogeneous in function and differentiation status, including suppressive or nonsuppressive cells as well as resting or activated Treg cells. We have searched for cell surface markers specific for suppression-competent Treg cells by using a panel of currently available monoclonal antibodies reactive with human T cells. ⋯ CD15s(+)CD4(+) T-cell depletion was sufficient to evoke and enhance in vitro immune responses against tumor or viral antigens. Collectively, we have identified CD15s as a biomarker instrumental in both phenotypic and functional analysis of FOXP3(+)CD4(+) T-cell subpopulations in health and disease. It allows specific targeting of eTreg cells, rather than whole FOXP3(+)CD4(+) T cells, in controlling immune responses.
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Chinese medical journal · Jun 2015
Postoperative Regulatory T-Cells and Natural Killer Cells in Stage I Nonsmall Cell Lung Cancer Underwent Video-assisted Thoracoscopic Lobectomy or Thoracotomy.
Regulatory T-cells (Treg) play key roles in suppressing cell-mediated immunity in cancer patients. Little is known about perioperative Treg fluctuations in nonsmall cell lung cancer (NSCLC). Video-assisted thoracoscopic (VATS) lobectomy, as a minimal invasive procedure for treating NSCLC, may have relatively less impact on the patient's immune system. This study aimed to observe perioperative dynamics of circulating Treg and natural killer (NK) cell levels in NSCLC patients who underwent major lobectomy by VATS or thoracotomy. ⋯ Lower Treg level on POD 90 and higher NK levels on PODs 1, 3, 7, 30 in VATS group might imply better preserved cell-mediated immune function in NSCLC patients, than those in thoracotomy group.
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Regulatory T cells (Tregs) with the plasticity of producing proinflammatory cytokine IL-17 have been demonstrated under normal and pathogenic conditions. However, it remains unclear whether IL-17-producing Tregs lose their suppressive functions because of their plasticity toward Th17 in autoimmunity. The aim of this study was to investigate IL-17-producing Tregs from patients with rheumatoid arthritis (RA), and characterise their regulatory capacity and clinical significance. ⋯ Increased levels of IL-17-producing Tregs were identified in RA patients. This Treg subset with Th17 plasticity in peripheral blood retained suppressive functions and was associated with milder inflammatory conditions, suggesting that this Treg population works as a negative regulator in RA, but in RA synovial site it may be pathogenic.
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Zhongguo Shi Yan Xue Ye Xue Za Zhi · Jun 2015
[Clinical Efficacy of DC and CIK Immunotherapy Combined with Chemotherapy and Its Impact on Treg Cells in Newly Diagnosed Multiple Myeloma].
To investigate the clinical efficacy and immune mechanism of immunotherapy of dendritic cells (DC) and cytokine-induced killer cell (CIK) combined with chemotherapy in patients with newly diagnosed multiple myeloma (MM). ⋯ DC-CIK immunotherapy can synergize or enhance the effect of chemotherapeutics, alleviate the immune dysfunction in MM; and DC-CIK immunotherapy combined with chemotherapy can elevate the clinical efficacy in patients with newly diagnosed multiple myeloma.