首页> 外文期刊>Clinical immunology: The official journal of the Clinical Immunology Society >Downregulation of TGF-beta1 mRNA and protein in the muscles of patients with inflammatory myopathies after treatment with high-dose intravenous immunoglobulin.
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Downregulation of TGF-beta1 mRNA and protein in the muscles of patients with inflammatory myopathies after treatment with high-dose intravenous immunoglobulin.

机译:大剂量静脉注射免疫球蛋白治疗后,炎症性肌病患者肌肉中TGF-beta1 mRNA和蛋白的下调。

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We used reverse transcription-polymerase chain reaction to study the level of TGF-beta1 mRNA expression and immunocytochemistry to examine the immunoreactive TGF-beta1 in muscle biopsy specimens from five patients with dermatomyositis (DM) and five patients with inclusion body myositis (IBM) obtained before and after 3 months treatment with intravenous immunoglobulin (IVIg). At baseline, the mRNA expression of TGF-beta1 was increased up to fivefold in the muscles of DM patients compared to that of IBM patients. After IVIg, TGF-beta1 was downregulated and the TGF-beta1 mRNA decreased twofold in the muscles of patients with DM who had successfully responded to therapy, but remained unchanged in the muscles of patients with IBM who did not respond. The downregulation of TGF-beta1 in DM was associated with improvement of the muscle cytoarchitecture and reduction of the endomysial inflammation and connective tissue, suggesting that in DM the excess of TGF-beta1 may be involved in the pathogenesis of chronic inflammation, fibrosis, and accumulation of extracellular matrix proteins. Copyright 2000 Academic Press.
机译:我们使用逆转录聚合酶链反应研究了TGF-beta1 mRNA的表达水平和免疫细胞化学,以检查从5例皮肌炎(DM)和5例包涵体肌炎(IBM)患者的肌肉活检标本中的免疫反应性TGF-beta1静脉免疫球蛋白(IVIg)治疗3个月之前和之后。在基线时,与IBM患者相比,DM患者肌肉中TGF-beta1的mRNA表达增加了五倍。 IVIg后,成功治疗的DM患者的肌肉中TGF-beta1下调,TGF-beta1 mRNA降低两倍,但对没有反应的IBM患者的肌肉中TGF-beta1 mRNA保持不变。 DM中TGF-β1的下调与肌肉细胞结构的改善以及子宫内膜炎和结缔组织的减少有关,这表明DM中过量的TGF-β1可能与慢性炎症,纤维化和积累的发病机制有关。细胞外基质蛋白版权所有2000学术出版社。

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