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  • Title: [Correlation of IgG Subclass with Blood Cell Parameters in Patients with Autoimmune Hemolytic anemia].
    Author: Li TX, Sun FT, Ji BJ.
    Journal: Zhongguo Shi Yan Xue Ye Xue Za Zhi; 2019 Feb; 27(1):197-201. PubMed ID: 30738470.
    Abstract:
    OBJECTIVE: To investigate the correlation of IgG subclasses with blood cell parameters in the patients with autoimmune hemolytic anemia (AIHA). METHODS: Thirty-four patients with AIHA (except C3d types) of immune complex type (IgG+C3d) and single IgG type, including 26 cases of primary AIHA and 8 cases of secondary AIHA from December 2010 to August 2016 in our hospital were selected and enrolled in AIHA group; 30 healthy persons were selected and enrolled in healthy control group. The levels of IgG subclasses in blood plasma were detected by double antibody sandwich ELISA in healthy persons and AIHA patients, at the same time. The levels of IgG subclasses in of RBC diffuse fluid were detected as well. The relation of IgG subclass level with some parameters of blood cells was analyzed in the hight of partial parameters of blood cells in patients. The independent sample test was used for comparison of data in 2 groups, the Spearman method was used for correlation analyziz. RESULTS: The average value of IgG1-4 in AIHA group was higher than that in healthy control group, there was statisticad difference between 2 groups (IgG1: t=-4.88, P<0.01; IgG2: t=-3.06. P<0.01; IgG3: t=-5.39, P<0.01; IgG4: t=-3.16, P<0.01), but the comparison of various. IgG subclass ratio in 2 groups showed that in addition to IgG4 (t=1.73, P >0.01) the ratio pf IgG1, IgG2 and IgG3 all had the statistical differences (IgG1: t=4.03, P<0.01; IgG2: t=7.38, P<0.01; IgG3: t=3.03, P<0.01). The spearmen analysis of corrclation of IgG subclass in blood plasma of patients with partial parameters of blood cells showed that the IgG4 positivety correlated with Hb level, the RBC count and HCT (Hb: r=0.358, P<0.05; RBC: r=0.426, P<0.05; HCT: r=0.363, P<0.05); the IgG1 and IgG2 negatively correlated with WBC count (IgG1: r=0.437, P<0.05; IgG2: r=-0.487, P<0.01); the IgG2 negatively correlated with count (r=-0.436, P<0.05). The comparison of IgG subclass ratio in plasma and RBC diffuse fluid of patients showed that in addition to IgG2 (t=1.544, P＞0.05), the rest IgG1, 3 and 4 all had statistical differences (IgG1: t=6.528, P<0.01; IgG3: t=-9.488, P<0.05; IgG4: t=-9.434, P<0.05). CONCLUSIONS: The AIHA relates with IgG1 and IgG3, the detection of IgG subclasses may have a certain significance for studying the diagnosis, treatment and pothogenesis of AIHA.
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