Helper T cells producing IL-17 (Th17) have high plasticity: restimulation of lymphocytes in an inflammatory environment can induce their transformation into with another phenotype, and a shift towards Th1 is the most common. The result this appearance expressing along classical markers Th17 key Th1-associated molecules. In its general form, population represented by CD4 + CD161 CCR6 CXCR3 IFNγ ...

One theory of immune regulation involves homeostasis between T-helper 1 (Th1) and T-helper 2 (Th2) activity. The Th1/Th2 hypothesis arose from 1986 research suggesting mouse T-helper cells expressed differing cytokine patterns. This hypothesis was adapted to human immunity, with Th1- and Th2-helper cells directing different immune response pathways. Th1 cells drive the type-1 pathway ("cellular...

Abstract After activation, naïve CD4 T cells can differentiate into helper cell subsets (Th1, Th2, Th17, and Follicular cells) or regulatory (Tregs), depending on the type of antigen-presenting (APC) cytokine milieu encountered during differentiation. Recent studies suggest that CD4+Foxp3+ Tregs produce pro-inflammatory IFNg when stimulated in a Th1 environment, such as presence IL-12, stimulat...

The parasitic worm Fasciola hepatica induces strong Th2 and T-regulatory immune responses while simultaneously suppressing Th1-driven immune responses to bystander microbial infections. It also prevents the initiation of Th1-mediated autoimmune disorders in mice through the suppression of Th17 and Th1 immune responses, and this can be mimicked by parasite-derived molecules. We have isolated F. ...

The pro-Th2 cytokine IL-33 is now emerging as an important Th1 cytokine-IFN-γ inducer in murine CD4(+) T cells that is essential for protective cell-mediated immunity against viral infection in mice. However, whether IL-33 can promote human Th1 cell differentiation and how IL-33 polarizes Th1 cells is less understood. We assessed the ability of IL-33 to induce Th1 cell differentiation and IFN-γ...

Due to differential expression of chemokine receptors, the Th1 and Th2 subsets of CD4 T cells differ in their migratory responses to chemokines. These differences in the migration patterns are likely to play a role in the initiation and regulation of Th1 and Th2 immune responses, inflammatory processes, and T-cell-mediated pathology. In the present study we evaluated the role of activated Th ce...

Cyclooxygenase (COX) inhibitors remain a major class of drugs in rheumatology and their widespread use is expected to continue. The view that a prothrombotic effect explains the increase in myocardial infarction (MI) associated with both COX-2 selective and traditional NSAIDs (tNSAIDs) has been increasingly questioned. We review the evidence that prostanoids direct the immune response away from...

Although evidence is strong that Th cells play a major role in mediating the airway inflammation observed in asthma, the relative contributions of the Th cell subsets, Th1 and Th2, are unclear. It has been suggested that asthma is driven by Th2 predominant responses in the lung, but other data suggest a role for Th1 cells as well. Here we show by intracellular cytokine staining and flow cytomet...

BACKGROUND Th1/Th2 cell balance is thought to be shifted toward a Th2-type immune response not only by malignancy but also by surgical stress. The aim of this study was to estimate perioperative immune responses with respect to the Th1/Th2 balance in patients with gastrointestinal cancer. METHODS Ninety-four patients who underwent abdominal surgeries were divided into three groups: gastric re...

T helper type 1 (Th1) cells are important effectors in a number of immune-mediated lung diseases. We recently described a murine model of lung injury induced by adoptive transfer of cloned alloreactive Th1 cells. To investigate mechanisms that result in injury to the lung, we studied the in vivo distribution of (51)Cr-labeled Th1 cells. One hour after intravenous administration, >85% of injecte...