A TLR9 agonist promotes IL-22-dependent pancreatic islet allograft survival in type 1 diabetic mice.

A TLR9 agonist promotes IL-22-dependent pancreatic islet allograft survival in type 1 diabetic mice.
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DOI:
10.1038/ncomms13896
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发表时间:
2016-12-16
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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胰岛移植是治疗1型糖尿病(T1 D)的一种有希望的潜在方法。同种异体胰岛移植物可在肝实质内长期存活。在这里,我们表明,肝脏NK 1.1+细胞诱导同种异体移植耐受T1 D小鼠模型。NK 1.1+细胞的致耐受性作用是通过IL-22的产生介导的,IL-22可提高同种异体移植物的存活率并增加胰岛素分泌。胰岛同种异体移植小鼠肝脏NK1.1+细胞NKG 2A表达增加与IL-22的产生和对同种异体移植物的炎症反应降低有关。用CpG寡核苷酸TLR 9激动剂(ODN 1585)接种T1 D小鼠增强了肝脏中产生IL-22的CD 3-NK1.1+细胞的扩增和同种异体移植物存活。我们的研究确定了肝脏NK 1.1+细胞,IL-22和CpG寡核苷酸在诱导肝实质中胰岛同种异体移植物耐受中的作用。 肝内胰岛移植作为1型糖尿病的潜在治疗方法,需要耐受性来防止排斥反应。在这里,作者表明,链脲佐菌素T1 D模型小鼠肝脏中NK 1.1+细胞产生的IL-22可以驱动对同种异体移植胰岛的耐受性。
Pancreatic islet transplantation is a promising potential cure for type 1 diabetes (T1D). Islet allografts can survive long term in the liver parenchyma. Here we show that liver NK1.1+ cells induce allograft tolerance in a T1D mouse model. The tolerogenic effects of NK1.1+ cells are mediated through IL-22 production, which enhances allograft survival and increases insulin secretion. Increased expression of NKG2A by liver NK1.1+ cells in islet allograft-transplanted mice is involved in the production of IL-22 and in the reduced inflammatory response to allografts. Vaccination of T1D mice with a CpG oligonucleotide TLR9 agonist (ODN 1585) enhances expansion of IL-22-producing CD3-NK1.1+ cells in the liver and prolongs allograft survival. Our study identifies a role for liver NK1.1+ cells, IL-22 and CpG oligonucleotides in the induction of tolerance to islet allografts in the liver parenchyma. Tolerance is required to prevent rejection of intrahepatic islet allografts as a potential treatment for type 1 diabetes. Here the authors show that IL-22 produced by NK1.1+ cells in the liver of streptozotocin T1D model mice can drive tolerance to allografted islets.
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