检验医学 ›› 2016, Vol. 31 ›› Issue (1): 9-12.DOI: 10.3969/j.issn.1673-8640.2016.01.002

• 临床应用研究·论著 • 上一篇    下一篇

2型糖尿病患者胰岛自身抗体阳性分布及C肽和相关生化指标的变化

钱鹏   

  1. 河南省职工医院检验科,河南 郑州 450002
  • 收稿日期:2015-03-23 出版日期:2016-01-31 发布日期:2016-02-16
  • 作者简介:null

    作者简介:钱鹏,男,1980年生,学士,主管技师,主要从事生化、免疫检验在各临床专业的应用和推广研究。

Insulin autoantibody positive distribution and the changes of C peptide and related biochemical indices in patients with type 2 diabetes mellitus

QIAN Peng   

  1. Department of Clinical Laboratory,Henan Province Worker Hospital,Zhengzhou 450002,Henan,China
  • Received:2015-03-23 Online:2016-01-31 Published:2016-02-16

摘要: 目的探讨2型糖尿病(T2DM)患者中成人隐匿性自身免疫性糖尿病(LADA)的比例及C肽和相关生化指标的变化。方法测定406例T2DM患者血清胰岛细胞抗体(ICA)、酪氨酸磷酸酶抗体(IA-2A)、谷氨酸脱羧酶抗体(GADA)和胰岛素抗体(IAA),结合临床诊断出其中的LADA患者,并与非LADA T2DM患者进行血糖、糖化血红蛋白(HbA1c)和C肽等指标的比较分析。通过受试者工作特征(ROC)曲线确定空腹C肽和餐后2 h C肽用于鉴别LADA与T2DM的临界值。结果406例T2DM患者中共确诊LADA患者39例(9.61%)。LADA患者的空腹血糖[(13.5±10.5)mmol/L]、餐后2 h血糖[(15.2±11.5)mmol/L]和HbA1c [(10.2±2.5)%] 均明显高于非LADA T2DM 患者[(10.1±8.9)mmol/L、(12.5±11.5)mmol/L、(7.8±2.6)%,P均<0.05];LADA患者空腹C肽[(0.45±0.25)μg/L]和餐后2 h C肽 [(1.05±0.26)μg/L]均明显低于非LADA T2DM患者 [(1.35±0.55)μg/L、(4.12±2.25)μg/L,P均<0.05]。空腹C肽和餐后2 h C肽鉴别诊断LADA与T2DM的最佳临界值分别为0.865和1.595 μg/L,诊断LADA的敏感性分别为97.4%和99.5%,特异性均为100.0%。结论在临床诊断为T2DM的患者中,检测胰岛自身抗体可检出其中的LADA患者,空腹和餐后2 h C肽可作为LADA与T2DM鉴别诊断的参考指标。

关键词: 胰岛自身抗体, 糖化血红蛋白, C肽, 成人隐匿性糖尿病, 2型糖尿病

Abstract:

Objective To investigate the proportion of latent autoimmune diabetes in adult(LADA) in patients with type 2 diabetes mellitus(T2DM) and the clinical significance of C peptide and related biochemical indices. Methods Serum islet cell antibody(ICA),tyrosine phosphatase antibody(IA-2A),glutamic acid decarboxylase antibody(GADA) and insulin antibody(IAA) were determined in 406 patients diagnosed as T2DM for the diagnosis of LADA,and the results were compared with blood glucose,glycated hemoglobin A1c(HbA1c),C peptide and related biochemical indices. The cut-off values of fasting C peptide and postprandial 2 h C peptide were chosen by receiver operating characteristic(ROC) curve to differentiate LADA and T2DM. Results In 406 T2DM patients,39 cases were diagnosed as LADA(9.61%). In LADA patients,fasting blood glucose was(13.5±10.5) mmol/L,postprandial 2 h blood glucose was(15.2±11.5) mmol/L,HbA1c was(10.2±2.5)%,and those in non-LADA T2DM patients were(10.1±8.9) mmol/L,(12.5±11.5) mmol/L and(7.8±2.6)%,which decreased significantly(P<0.05). In LADA patients,fasting C peptide was(0.45±0.25) μg/L,postprandial 2 h C peptide was(1.05±0.26) μg/L,which were lower than those in non-LADA T2DM patients [(1.35±0.55) μg/L and(4.12±2.25) μg/L,P<0.05]. The optimal cut-off values of fasting C peptide and postprandial 2 h C peptide for differentiating LADA and T2DM were 0.865 and 1.595 μg/L. The sensitivities of fasting C peptide and postprandial 2 h C peptide for the diagnosis of LADA were 97.4% and 99.5%,and the specificities were 100.0% and 100.0%. Conclusions In the clinical diagnosis of T2DM,insulin autoantibodies can be determined for LADA patients,and fasting C peptide and postprandial 2 h C peptide can be used as indices for the differential diagnosis of LADA and T2DM.

Key words: Insulin autoantibody, Glycated hemoglobin A1c, C peptide, Latent autoimmune diabetes in adult, Type 2 diabetes mellitus

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