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Adipose Tissue-Derived Mesenchymal Stem Cells Attenuate Staphylococcal Enterotoxin A-Induced Toxic Shock

机译:脂肪组织来源的间充质干细胞减弱葡萄球菌肠毒素A引起的中毒性休克

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Adipose tissue-derived stem cells (ASCs), which are mesenchymal stromal cells isolated from adipose tissues, exhibit immunomodulatory effects that are promising for several applications, including the therapeutics of inflammatory diseases. In the present study, the effect of ASCs on bacterial toxin-induced inflammation was investigated. Intraperitoneal administration of ASCs rescued mice from lethal shock induced by staphylococcal enterotoxin A (SEA) potentiated with lipopolysaccharide. In the sera and/or spleens of mice administered ASCs, the production of proinflammatory cytokines, including interferon gamma, tumor necrosis factor alpha, interleukin-6 (IL-6), and IL-2 was reduced. By quantitative real-time PCR, the expression of Foxp3 in the mice administered ASCs was not altered. On the other hand, the expression of IL-12 receptor and STAT4 was decreased with ASC administration. These results imply that the effect of ASCs is not involved in the lineage of regulatory T cells but that these cells may modulate TH1 differentiation. This information provides evidence that ASCs have properties that are effective to attenuate SEA-induced toxic shock and should prompt further exploration on other inflammatory diseases caused by bacterial toxins or bacterial infections.
机译:脂肪组织衍生的干细胞(ASC)是从脂肪组织中分离的间质基质细胞,具有免疫调节作用,有望在包括炎症性疾病在内的多种应用中获得应用。在本研究中,研究了ASC对细菌毒素诱导的炎症的影响。腹膜内给予ASC可使小鼠免受脂多糖增强的葡萄球菌肠毒素A(SEA)诱导的致死性休克。在给予ASC的小鼠的血清和/或脾脏中,促炎细胞因子(包括干扰素γ,肿瘤坏死因子α,白介素6(IL-6)和IL-2)的产生减少了。通过定量实时PCR,在施用ASC的小鼠中Foxp3的表达没有改变。另一方面,ASC给药降低了IL-12受体和STAT4的表达。这些结果暗示,ASC的作用不参与调节性T细胞的谱系,但是这些细胞可能调节TH1分化。该信息提供了证据,表明ASC具有可有效减弱SEA诱导的毒性休克的特性,并应促使人们进一步探索由细菌毒素或细菌感染引起的其他炎性疾病。

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