Prevention of nonimmunologic loss of transplanted islets in monkeys.

Prevention of nonimmunologic loss of transplanted islets in monkeys.
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DOI:
10.1111/ajt.12723
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发表时间:
2014-07
期刊:
American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons
影响因子:
--
通讯作者:
Strom TB
Strom TB
中科院分区:
其他
文献类型:
--
作者:
Koulmanda M;Sampathkumar RS;Bhasin M;Qipo A;Fan Z;Singh G;Movahedi B;Duggan M;Chipashvili V;Strom TB

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在胰岛移植前、移植中和移植后早期,胰岛的非免疫性丢失是非常严重的。为了确定仅移植少量功能性β细胞在触发晚期非免疫性移植物丢失中可能发挥的潜在作用,我们研究了在自体食蟹猴胰岛移植模型中α-1-抗胰蛋白酶(AAT)治疗的效果。自体胰岛的边缘质量,即从70%至80%的胰腺制备的胰岛,以1600-4100 IEQ/kg移植到胰腺次全切除、链脲佐菌素治疗和胰岛素缺乏的糖尿病宿主中。在这种边缘质量胰岛移植模型中,胰岛功能随着时间的推移而不知不觉地丧失,并且在移植后180天,所有未治疗的猴子中糖尿病复发。在移植围术期使用AAT(一种急性期反应物)进行短期治疗可通过影响TGFβ、NFκB和AKT的表达并有利地改变细胞死亡和存活途径的表达来终止炎症,如通过系统生物学方法和组织学检测的。这些作用使得移植宿主中胰岛质量的功能性扩增成为可能,使得移植物功能随着时间的推移而改善而不是恶化。
The nonimmunologic loss of islets in the pre-, peri-, and early post-islet transplant periods is profound. To determine the potential role that transplantation of only a marginal mass of functioning beta cells may play in triggering late nonimmunologic graft loss, we studied the effect of treatment with alpha-1-antitrypsin (AAT) in the autologous cynomolgus islet transplant model. A marginal mass of autologous islets, that is islets prepared from 70% to 80% of the pancreas, was transplanted at 1600–4100 IEQ/kg into subtotal pancreatectomized, streptozotocin-treated and insulin-deficient diabetic hosts. In this marginal mass islet transplant model, islet function is insidiously lost over time and diabetes recurs in all untreated monkeys by 180 days posttransplantation. Short-term treatment with AAT, an acute phase reactant, in the peritransplant period serves to terminate inflammation through effects upon expression of TGFβ, NFκB and AKT and favorably altering expression of cell death and survival pathways, as detected by a system biology approach and histology. These effects enabled functional expansion of the islet mass in transplanted hosts such that graft function improves rather than deteriorating over time.
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