Robust tolerogenic dendritic cells via push/pull pairing of toll-like-receptor agonists and immunomodulators reduces EAE.

Robust tolerogenic dendritic cells via push/pull pairing of toll-like-receptor agonists and immunomodulators reduces EAE.
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DOI:
10.1016/j.biomaterials.2022.121571
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发表时间:
2022-07
期刊:
影响因子:
14
通讯作者:
--
中科院分区:
工程技术1区
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--
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由自身抗原特异性T调节(Treg)细胞驱动的中枢免疫耐受失败是许多自身免疫性疾病的主要原因。适当的自身抗原Treg特异性反应的恢复有望成为各种自身免疫性疾病的高效、长期治疗方法。由于大多数耐受性药物的非特异性和体内生成treg的复杂性,生成自身抗原特异性treg仍然是一个挑战。在这里,我们展示了一种新的推/拉方法,通过诱导耐受性树突状细胞(toldc)来诱导抗原特异性Treg耐受性。我们确定了三种耐受性药物,地塞米松,辛伐他汀和SC-514的组合,当与toll样受体(TLR)激动剂联合使用时,可诱导活性tolDC表型。当将耐受原组合与模型抗原(如卵清蛋白(OVA))一起包装到脂体中时,这些toldc诱导OVA特异性treg在体内和体外分化。我们在实验性自身免疫性脑脊髓炎(EAE)疾病模型中检测了该组合的耐受性潜力。鉴于该技术的抗原特异性,本文提出了一种有吸引力的临床前自身免疫治疗。
A failure of central immune tolerance driven by autoantigen specific T regulatory (Treg) cells is a major cause of many autoimmune diseases. Restoration of proper autoantigen Treg specific response holds promise as a highly effective, long-term therapy for a wide variety of autoimmune diseases. Generating autoantigen specific Tregs remains a challenge due to the non-specific nature of most tolerizing agents and the complexities of generating Tregs in vivo. Here we show a new push/pull method for inducing antigen-specific Treg tolerance via induction of tolerogenic dendritic cells (tolDCs). We identified a combination of three tolerogenic drugs, dexamethasone, simvastatin and SC-514, which when used in combination with toll-like-receptor (TLR) agonists induces an active tolDC phenotype. When the tolerogenic combination was packaged into a liposome with a model antigen such as ovalbumin (OVA), these tolDCs induce differentiation of OVA specific Tregs both ex vivo and in vivo. We examined the tolerizing potential of the combination in an experimental autoimmune encephalomyelitis (EAE) disease model. Given the antigen specificity of this technique, this paper presents an attractive preclinical autoimmune therapy.
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