OBJECTIVES To investigate numbers and function of CD25(+) regulatory T cells (Tregs) that lack IL-7 receptor (CD127) expression in RA. METHODS Numbers of CD4 T cells expressing either CD25 or CD127, and those co-expressing or lacking both CD25 and CD127 were assessed in peripheral blood (PB) of RA patients and healthy controls, and in paired samples of SF and PB from RA patients. All T-cell s...

Young children are impaired in their response to T cell-independent (TI) Ags, such as pneumococcal polysaccharide (PPS). B lymphopoeisis early in life is IL-7 independent, whereas in adults it is IL-7 dependent. Therefore, we hypothesized that IL-7-driven B lymphopoiesis plays a critical role in promoting Ab responses to TI Ags. Young but not adult mice are impaired in responses to PPS vaccinat...

APC = antigen presenting cell; cTEC = thymic cortical epithelial cell; DC = dendritic cell; IκB = inhibitory κB; IL = interleukin; mTEC = medullary thymic epithelial cell; NFκB = nuclear factor κB; NIK = NFκB inhibitory kinase; NOD = non-obese diabetic; NZB = New Zealand black; TLR = tolllike receptor; TNF = tumor necrosis factor; TRAF6 = TNF receptor associated factor 6. Arthritis Research & T...

HIV disease results in decreased IL-7 receptor expression and IL-7 responsiveness in T cells. To explore mechanisms of these deficiencies, we compared CD127 expression and IL-7 induction of P-STAT5 in T cells from HIV-infected persons with serum concentrations of cytokines (IL-7, IL-6 and IL-15), markers of microbial translocation (sCD14 and LPS), and with an indicator of oxidative stress (malo...

APC = antigen presenting cell; cTEC = thymic cortical epithelial cell; DC = dendritic cell; IκB = inhibitory κB; IL = interleukin; mTEC = medullary thymic epithelial cell; NFκB = nuclear factor κB; NIK = NFκB inhibitory kinase; NOD = non-obese diabetic; NZB = New Zealand black; TLR = tolllike receptor; TNF = tumor necrosis factor; TRAF6 = TNF receptor associated factor 6. Arthritis Research & T...

introduction: renin angiotensin system has an important role in blood pressure and renal functions. active angiotensin-converting enzyme 2 converts angiotensin i into angiotensin-(1-7) which is a vasodilator hormone and interacts with nitric oxide changes as well as other angiotensin ii receptors. in this study we evaluated the role of mas receptor antagonist (a779) and renal perfusion pressure...

Background Interleukin (IL)-7 signaling is essential to CD8 T-cell development, homeostasis and function, and we have previously shown decreased expression of the IL-7 receptor alpha-chain (CD127) on CD8 T-cells in HIV+ patients. We have also shown that this down regulation of CD127 is mediated in part by soluble HIV Tat protein. By removing the IL-7 receptor from the cell surface, Tat is able ...

Angiotensin (Ang)-(1-7) has been described as an important tool on treating and preventing metabolic disorders. In this study, we aimed to evaluate the effect of an oral formulation of Ang-(1-7) included in hydroxypropylβ-cyclodextrin (HPβCD/Ang-[1-7]) on hepatic function, steatosis, and on liver inflammatory markers expression in mice treated with a high-fat diet. Male FVB/N mice were divided ...

Fully functional CD8(+) T cell memory is highly dependent upon CD4(+) T cell support. CD4(+) T cells play a critical role in inducing the expression of CD70, the ligand for CD27, on dendritic cells. In this study, we demonstrate that CD27 stimulation during primary CD8(+) T cell responses regulates the ability to mount secondary CD8(+) T cell responses. CD27 stimulation during vaccinia and dend...