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在北印度1型糖尿病患者中,岛屿自身抗体及其免疫遗传关联的模式和持久性及其免疫遗传关联
Shreya Sharma1, Alpesh Goyal1, Uma Kanga2
1Department of Endocrinology and Metabolism, All India Institute of Medical Sciences, New Delhi, India.
Indian journal of pediatrics
|December 12, 2025
概括
大多数1型糖尿病患者都有小岛自身抗体,GAD-65A是稳定的诊断标志物. 诊断时年轻的年龄和自身抗体阳性预测β细胞下降的速度更快.
科学领域:
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 1型糖尿病 (T1DM) 是一种自身免疫性疾病,其特征是胰腺β细胞的破坏.
- 岛屿自身抗体是T1DM诊断和预测的关键生物标志物.
- 人类白细胞抗原 (HLA) 基因在T1DM易感性中发挥着重要作用.
研究的目的:
- 在T1DM患者中确定关键小岛自身抗体 (GAD-65A,IA-2A,ZnT8A) 的流行率和持久性.
- 探索HLA等位基因与这些自身抗体的存在和持久性的关联.
- 评估自身抗体状态,诊断时的年龄和β细胞功能 (禁食C) 之间的关系.
主要方法:
- 在基线和随着时间的推移 (2-5,5-10,>10年) 评估的小岛自身抗体 (GAD-65A,IA-2A,ZnT8A) 和禁食C- (FCP).
- 对单个自身抗体和它们的持久性进行评估的HLA关联.
- 分析了366名T1DM参与者,在基线时糖尿病持续时间中位数为6年.
主要成果:
- 对任何自身抗体的整体阳性为67.5%,在糖尿病≤2年患者中增加到76%.
- 与IA-2A (11年) 和ZnT8A (12年) 相比,GAD-65A阳性持续时间更长 (平均存活时间为31年).
- 中位数的FCP存活时间为5年;较年轻的患者 (诊断时小于10岁) 和自身抗体阳性患者的存活时间较短. HLA-DRB1*03与GAD-65A有联系,而HLA-DRB1*04与ZnT8A有联系.
结论:
- 在T1DM患者中观察到岛屿自身抗体的高患病率,即使是已确诊的疾病.
- GAD-65A是一种普遍且稳定的自身抗体,作为T1DM的可靠诊断标记物.
- 早期T1DM和自身抗体阳性与β细胞功能的更快速下降有关.
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