1,246 research outputs found

    A preliminary study of university disclosures

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    Disclosures, such as financial statements and annual reports, provide relevant and reliable information for decision-making and general interest. This study evaluates the disclosures by universities to the public using analysis based on general accounting theory and index items from previous studies. The objective is to determine the accountability of the eight universities sampled to their stakeholders through these disclosures. The findings indicate a need for much improvement and further research on the use of information disclosures

    Autocrine Regulation of IL-21 Production in Human T Lymphocytes

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    Abstract IL-21 has pathologic function in immune-inflammatory diseases. IL-21 mediates its functions through a heterodimeric receptor, composed of a specific subunit, termed IL-21R, and the common Îł-chain. IL-21 is mostly produced by CD4+ T cells, but molecular mechanisms that regulate IL-21 synthesis are not fully understood. The fact that CD4+ T cells express high levels of IL-21R and are capable of functionally responding to IL-21 raises the possibility that IL-21 may regulate its own production. We here show that IL-21 enhances IL-21 RNA and protein expression in human peripheral blood CD3+ T cells in a dose- and time-dependent fashion. Additionally, both IL-7 and IL-15, but not IL-4, induce IL-21, thus suggesting that common Îł-chain signals are not sufficient to promote IL-21 synthesis. Analysis of molecular mechanisms underlying IL-21 induction reveals that IL-21 activates Stat3 and enhances its recruitment to IL-21 gene promoter. Pharmacologic inhibition and knockdown of Stat3 by small interference RNA largely prevent IL-21 induction in IL-21-treated cells. Consistently, IL-21 is inducible in T cells by IL-6, another cytokine that activates Stat3. Finally, we show that IL-21 positively regulates its own expression in human intestinal CD3+ lamina propria lymphocytes, and blockade of endogenous IL-21 in cultures of CD3+ lamina propria lymphocytes isolated from patients with Crohn's disease, a chronic inflammatory bowel disease characterized by high IL-21, down-regulates Stat3 activation and IL-21 expression. These data suggest the existence of a positive autocrine loop that could help to amplify and stabilize IL-21-driven, T cell-mediated responses

    Dickkopf-related protein 1 (Dkk1) regulates the accumulation and function of myeloid derived suppressor cells in cancer

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    Tumor–stroma interactions contribute to tumorigenesis. Tumor cells can educate the stroma at primary and distant sites to facilitate the recruitment of heterogeneous populations of immature myeloid cells, known as myeloid-derived suppressor cells (MDSCs). MDSCs suppress T cell responses and promote tumor proliferation. One outstanding question is how the local and distant stroma modulate MDSCs during tumor progression. Down-regulation of β-catenin is critical for MDSC accumulation and immune suppressive functions in mice and humans. Here, we demonstrate that stroma-derived Dickkopf-1 (Dkk1) targets β-catenin in MDSCs, thus exerting immune suppressive effects during tumor progression. Mice bearing extraskeletal tumors show significantly elevated levels of Dkk1 in bone microenvironment relative to tumor site. Strikingly, Dkk1 neutralization decreases tumor growth and MDSC numbers by rescuing β-catenin in these cells and restores T cell recruitment at the tumor site. Recombinant Dkk1 suppresses β-catenin target genes in MDSCs from mice and humans and anti-Dkk1 loses its antitumor effects in mice lacking β-catenin in myeloid cells or after depletion of MDSCs, demonstrating that Dkk1 directly targets MDSCs. Furthermore, we find a correlation between CD15(+) myeloid cells and Dkk1 in pancreatic cancer patients. We establish a novel immunomodulatory role for Dkk1 in regulating tumor-induced immune suppression via targeting β-catenin in MDSCs

    Sustainable Materials in the Creative Industries: A scoping report for the AHRC (Redacted Version)

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    This report contains the results of a twelve-month scoping study of current sustainable practice around materials across the creative industries. The project team has explored current and immanent sustainable practice around the sourcing, use, disposal, reuse, recycling, and upcycling of materials, to help understand the creative sector's ongoing responses and its current and potential contribution to the development of a circular economy. It provides a snapshot of practice and perceptions around material sustainability in the creative industries, identifying existing trends and showcasing cutting-edge developments, as well as flagging sector-wide and discipline specific barriers that will have to be negotiated or addressed to achieve widespread sustainably orientated practice
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