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  5. 免疫調節因子與自體免疫甲狀腺疾病的相關性
 
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免疫調節因子與自體免疫甲狀腺疾病的相關性

Other Title
The Association of Immunomodulatory Factors with Autoimmune Thyroid Disease
Type
thesis
Date Issued
2017-12-20
Author(s)
林俊佃
Advisor
鄭朝文
Subjects
系所名稱:臨床醫學研究所
Description
學位別:博士
語文別:中文
指導教授:鄭朝文
口試委員:林裕峰;林秋烽;洪乙仁;裴馰
中文關鍵字:第八干擾素調節因子;葛瑞夫茲氏疾病;橋本氏甲狀腺炎;自體免疫甲狀腺疾病;B細胞活化因子
英文關鍵字:interferon regulatory factor 8;Graves’ disease;Hashimoto’s thyroiditis;autoimmune thyroid disease;B-lymphocyte-activating factor.
Abstract
背景:干擾素調節因子-第一型干擾素(type 1 IFN)- B細胞活化因子?BAFF)的訊息傳導與自體免疫疾病的發病有關,但是,這訊息路徑對自體甲狀腺免疫疾病?AITD?的發病與臨床表徵的影響並不清楚,因此需要進一步去闡明。第八干擾素調節因子?IRF8),可調控第一型干擾素,它的基因變異,被認為與紅斑性狼瘡及多發性硬化症的發病有關。同時,B細胞活化因子?BAFF),被第一型干擾素調控,與B細胞功能有關,而它的基因多型性也被發現與紅斑性狼瘡、類風溼性關節炎、乾燥症有關。在本研究中,我們主要著墨在IRF8-type 1 IFN-BAFF的訊息路徑。我們探討中國人IRF8的基因多型性rs17445836 and rs2280381,與BAFF的基因多型性rs1041569 and rs2893321與AITD的相關性。同時,我們也同時探討血清BAFF與 AITD的相關性。
研究方法與材料:共有葛瑞夫茲氏疾病(GD) 278人,橋本氏甲狀腺炎?HT?55人,健康者252人納入IRF8的基因多型性研究。GD 319人,HT83人,健康者369人,收入BAFF的基因多型性研究。另外,我們也收集了170個GD病人,51 HT患者,與124健康者的血清進行血中BAFF蛋白質的分析。我們使用聚合?連鎖反應-限制?片段長度多型性方法與直接定序來決定基因型。我們也測量了病人發病時的甲狀腺功能與甲狀腺自體抗體,包括甲狀腺刺激素自體抗體 (TSHRAb),抗微粒體抗體(AmiA),與抗甲狀腺球蛋白抗體(ATA)。
結果:在IRF8的研究中,我們發現HT的病人比之健康者的rs17445836有較低比例的的GA genotype與 A allele(p = 0.028, odds ratio (OR) = 4.71 and p = 0.022, OR = 4.40)。rs17445836 與 rs2280381都與AmiA的產生有關。另外,rs17445836在AITD中與AmiA的濃度有關。在BAFF的研究中,我們發現GD與健康者(p = 0.013, OR = 0.76, and p = 0.017, OR = 0.68)及AITD與健康者(p = 0.009, OR = 0.76 and,p = 0.014, OR = 0.69)的rs2893321的G allele 與AG+GG genotype比例不同。在男性中,rs2893321的AA genotype伴隨著較低濃度的TSHRAb。在男性中,rs2893321的AA genotype伴隨著單一種抗體而女性則較易伴隨這兩種抗體。另外,我們發現血清BAFF在GD、HT及AITD的病人中是升高的。在女性中,血清BAFF與TSHRAb(r = 0.238, p = 0.018) , AmiA(p = 0.038) , 及ATA(p = 0.025)濃度都有相關。此外,在女性的active GD中,血清BAFF與游離甲狀腺素(r = 0.430, p = 0.004)及TSHRAb(r = 0.495, p = 0.001)有關,但在inactive GD則無相關。
結論:所有基因多型性與血清蛋白質的研究都高度暗示IRF8-type 1 IFN-BAFF的訊息路徑參與了AITD的發病機轉,這個路徑的破壞有可能誘發AITD或改變AITD的臨床表徵,而這有可能是可以被性荷爾蒙調控的。這些結果提供了未來可以從針對IRF8-type 1 IFN-BAFF的訊息路徑的免疫介入治療AITD病人的重要訊息。
URI
https://203.71.86.71/handle/123456789/58197

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