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Orietta D'Orlando Fang Zhao Brigitte Kasper Zane Orinska Jürgen Müller Irm Hermans‐Borgmeyer Gillian M. Griffiths Udo Zur Stadt Silvia Bulfone‐Paus 《European journal of immunology》2013,43(1):194-208
Syntaxin 11 (STX11) controls vesicular trafficking and is a key player in exocytosis. Since Stx11 mutations are causally associated with a familial hemophagocytic lymphohistio‐cytosis, we wanted to clarify whether STX11 is functionally important for key immune cell populations. This was studied in primary cells obtained from newly generated Stx11?/? mice. Our data revealed that STX11 is not only widely expressed in different immune cells, but also induced upon LPS or IFN‐γ treatment. However, Stx11 deficiency does not affect macrophage phagocytic function and cytokine secretion, mast cell activation, or antigen presentation by DCs. Instead, STX11 selectively controls lymphocyte cytotoxicity in NK and activated CD8+ T cells and degranulation in neutrophils. Stx11?/? NK cells and CTLs show impaired degranulation, despite a comparable activation, maturation and expression of the complex‐forming partners MUNC18–2 and VTI1B. In addition, Stx11?/? CTLs and NK cells produce abnormal levels of IFN‐γ. Since functional reconstitution rescues the defective phenotype of Stx11?/? CTLs, we suggest a direct, specific and key role of STX11 in controlling lymphocyte cytotoxicity, cytokine production and secretion. Finally, we show that these mice are a very useful tool for dissecting the role of STX11 in vesicular trafficking and secretion. 相似文献
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Bruce A Cooper Pauline Branley Liliana Bulfone John F Collins Jonathan C Craig Jenny Dempster Margaret B Fraenkel Anthony Harris David C Harris David W Johnson Joan Kesselhut Grant Luxton Andrew Pilmore Carol A Pollock David J Tiller 《Peritoneal dialysis international》2004,24(2):176-181
OBJECTIVES: The primary objective of the IDEAL study is to determine whether the timing of dialysis initiation has an effect on survival in subjects with end-stage renal disease (ESRD). The secondary objectives are to determine the impact of "early start" versus "late start" dialysis on nutritional and cardiac morbidity, quality of life, and economic cost. DESIGN: Prospective multicenter randomized controlled trial. Patients are randomized to commence dialysis at a glomerular filtration rate (by Cockcroft-Gault) of either 10-14 mL/minute/1.73 m2 ("early start") or 5-7 mL/min/1.73 m2 ("late start"), with stratification for dialysis modality (hemodialysis vs peritoneal dialysis), study center, and the presence or not of diabetes mellitus. SETTING: Dialysis units throughout Australia and New Zealand. PATIENTS: Patients with ESRD commencing chronic dialysis therapy. OUTCOME MEASURES: Three years from randomization, all-cause mortality, morbidity, and economic impact; structural and functional cardiac status, nutritional state, and quality of life will be assessed. RESULTS: To date, 388 patients of a minimum 800 patients have been entered and randomized into the study. Current recruitment rates suggest sufficient patients will be enrolled by December 2004 and follow-up completed by December 2007. CONCLUSIONS: The IDEAL study will provide evidence for the optimal time to commence dialysis. 相似文献
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