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采用速率散射比浊法、淋巴细胞转化实验、巨噬细胞吞噬实验及间接免疫荧光法对复发性口疮（简称ＲＡＵ）患者免疫功能进行了检测。结果表明：（１）ＲＡＵ患者血清ＩｇＧ、ＩｇＡ、Ｃ４含量高于正常人（Ｐ＞０．０５）。（２）淋巴细胞转化率、巨噬细胞吞噬率均低于正常人（Ｐ＜０．０５）。Ｔ淋巴细胞总数（Ｔ３）低于正常人，抑制性Ｔ细胞（Ｔ８）高于正常人，辅助性Ｔ细胞（Ｔ４）与Ｔ８比值下降（Ｐ＜０．０５）。说明ＲＡＵ患者体液免疫功能增强，细胞免疫水平处于抑制状态。提示ＲＡＵ的发病机理与自身免疫功能的紊乱有关
The immune function of patients with recurrent aphthous ulcer (RAU) was tested by rate nephelometry, lymphocyte transformation, macrophage phagocytosis and indirect immunofluorescence. The results showed that: (1) Serum IgG, IgA and C4 levels in RAU patients were higher than those in normal controls (P> 0.05). (2) The rate of lymphocyte transformation and phagocytosis of macrophages were lower than that of normal people (P <0.05). The total number of T lymphocytes (T3) was lower than that of normal people, T8 (T8) was higher than that of normal people, and the ratio of T helper T cells (T8) and T8 was decreased (P <0.05). This shows that patients with RAU enhanced humoral immunity, cellular immune suppression in the state. Tip RAU pathogenesis and autoimmune disorders