促甲状腺激素受体、甲状腺过氧化物酶及甲状腺球蛋白基因表达与自身免疫甲状腺疾病

GENE EXPRESSION OF THYROTROPIN RECEPTER, THYROID PEROXIDASE AND THYROGLOBULIN IN AUTOIMMUNE THYROID DISEASE

为探讨促甲状腺激素（ＴＳＨ）受体、甲状腺过氧化物酶（ＴＰＯ）及甲状腺球蛋白（ＴＧ）ｍＲＮＡ在自身免疫甲状腺疾病（ＡＩＴＤ）病人甲状腺组织的表达情况及其相互关系，应用Ｎｏｒｔｈｅｒｎ印记杂交技术观察了ＴＳＨ受体、ＴＰＯ以及ＴＧｍＲＮＡ在７例Ｇｒａｖｅｓ病（ＧＤ），２例桥本甲状腺炎（ＨＴ）病人甲状腺组织中的表达。研究显示：ＴＳＨ受体ｍＲＮＡ与ＴＰＯ和ＴＧｍＲＮＡ在ＧＤ组和ＨＴ组表达不一致，ＧＤ组ＴＳＨ受体ｍＲＮＡ与ＴＰＯ和ＴＧｍＲＮＡ表达基本平行，均有明显增高，ＨＴ组中ＴＳＨ受体ｍＲＮＡ表达与对照组差别不大，但ＴＰＯ、ＴＧｍＲＮＡ表达较低。这种基因表达差异的原因可能与自身免疫性抗体的种类不同、滴度不一致有关。

To investigate the expression of thyrotropin (TSH) receptor gene in autoimmune thyroid disease and the relationship with expression of thyroid peroxidase (TPO) and thyroglobulin (TG) genes, we examined TSH receptor, TPO and TG gene expression levels in 10 human thyroid tissues by Northern blot analysis, including 7 Graves disease (GD), 2 Hashimoto disease (HT), and 1 normal thyroid tissue. The expression levels of TSH R gene and TG/TPO gene were different between GD group and HT group. In GD group, TSH R gene expression was closely correlated to the expression of TPO gene ( r =0.882; P <0.01) and TG gene ( r =0.723; P <0.05). The gene expression levels in GD were higher than those in HT and control. In HT group, TPO, TG gene expression levels were relatively lower while TSH R gene expression levels were still in normal range. The difference in gene oxpression is possibly related to the types of autoimmune antibodies and various dripping rates.