首页> 外文期刊>Clinical immunology: The official journal of the Clinical Immunology Society >A simplified method to assess affinity of insulin autoantibodies.
【24h】

A simplified method to assess affinity of insulin autoantibodies.

机译:一种评估胰岛素自身抗体亲和力的简化方法。

获取原文
获取原文并翻译 | 示例
           

摘要

Insulin autoantibodies (IAA) precede type 1 diabetes, but not all IAA-positive children develop other islet autoantibodies and disease. Diabetes risk can be stratified by laborious IAA affinity measurement using competition with multiple ligand concentrations. Here, we identify a single competitor concentration that discriminates low- and high-affinity IAA. Discrimination was achieved among 122 IAA-positive sera using 7.0 nM competitor which is 54-fold that of the assay radioligand concentration. Relative-binding <60% at this competitor concentration identified all 85 sera with affinities >/=1.0x10 L/mol and none with lower affinities (P<0.0001), and 45 (96%) of 47 multiple islet autoantibody-positive sera (P<0.0001). IAA competition was further tested in a second set of 119 IAA-positive sera. Of these, 99 fulfilled high-affinity competition criteria of <60% relative-binding at 7.0 nM competitor including 89 (94%) of 95 sera with multiple islet autoantibodies (P<0.0001). Thus, increased IAA specificity can be achieved with simple modification to existing assays.
机译:胰岛素自身抗体(IAA)早于1型糖尿病,但并非所有IAA阳性儿童都会发展其他胰岛自身抗体和疾病。可以通过使用多种配体浓度竞争进行费力的IAA亲和力测量来对糖尿病风险进行分层。在这里,我们确定了区分低亲和力和高亲和力IAA的单一竞争者浓度。使用7.0 nM竞争物在122 IAA阳性血清之间实现了区分,这是测定放射性配体浓度的54倍。在此竞争者浓度下,相对结合<60%鉴定出所有85个血清的亲和力> / = 1.0x10 L / mol,没有一个具有较低的亲和力(P <0.0001),以及47个多胰岛自身抗体阳性血清中的45个(96%)( P <0.0001)。在第二组119 IAA阳性血清中进一步测试了IAA竞争。其中,有99个满足了在7.0 nM竞争者时相对结合<60%的高亲和力竞争标准,包括89个(94%)95个血清的胰岛自身抗体(P <0.0001)。因此,可以通过对现有检测方法的简单修改来实现提高的IAA特异性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号