Selective Inhibition of Monocyte Chemoattractant Protein-1 Gene Expression in Human Embryonal Kidney Cells by Specific Triple Helix-Forming Oligonucleotides1

Selective Inhibition of Monocyte Chemoattractant Protein-1 Gene Expression in Human Embryonal Kidney Cells by Specific Triple Helix-Forming Oligonucleotides1
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特异性三螺旋形成寡核苷酸选择性抑制人胚肾细胞中单核细胞趋化蛋白 1 基因表达1

DOI:
10.4049/jimmunol.164.4.2070
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发表时间:
2000
期刊:
The Journal of Immunology
影响因子:
--
通讯作者:
H. Radeke
H. Radeke
中科院分区:
--
文献类型:
--
作者:
Petra Marchand;K. Resch;H. Radeke

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单核细胞趋化蛋白-1 (MCP-1) 是多种组织细胞响应炎症刺激而表达的趋化因子,例如 IL-1β、TNF-α 和 IFN-γ。 MCP-1 的主要功能是募集和激活单核细胞和 T 淋巴细胞。 MCP-1的过表达与许多疾病有关,包括肾小球肾炎和类风湿性关节炎,表明MCP-1活性和/或表达的调节是期望的治疗策略。在本研究中,我们的目的是测试是否可以使用三螺旋形成寡核苷酸(TFO)在转录水平抑制 MCP-1 的表达。我们设计了一个针对人类 MCP-1 基因启动子中 SP-1 结合位点的 TFO。凝胶迁移率变化测定表明,磷酸二酯 TFO 与其 dsDNA 靶标形成序列特异性三链体,EC50 为 ~1.9 × 10−7 M。相应的硫代磷酸寡核苷酸在该测定中也有效,EC50 值高出 8 倍。 TFO 与靶 DNA 的结合阻止了 rSP-1 和体外核蛋白的结合。 TFO 还可以部分抑制培养的人胚胎肾细胞中的内源性 MCP-1 基因表达。用 TFO 处理 TNF-α 刺激的人胚肾 293 细胞,以剂量依赖性方式抑制 MCP-1 的分泌(5 μM 寡核苷酸时抑制率高达 45%)。 MCP 分泌的抑制是在基因转录水平上引起的,因为寡核苷酸处理的细胞中 MCP-1 mRNA 水平也降低了约 40%。
Monocyte chemoattractant protein-1 (MCP-1) is a chemokine that is expressed by a variety of tissue cells in response to inflammatory stimuli, such as IL-1β, TNF-α, and IFN-γ. A major function of MCP-1 is the recruitment and activation of monocytes and T lymphocytes. Overexpression of MCP-1 has been implicated in a number of diseases, including glomerulonephritis and rheumatoid arthritis, indicating that the modulation of MCP-1 activity and/or expression is a desired therapeutic strategy. In the present study, our aim was to test whether the MCP-1 expression could be inhibited at the transcriptional level using triple helix-forming oligonucleotides (TFOs). We designed a TFO targeted to the SP-1 binding site in the human MCP-1 gene promoter. Gel mobility shift assays demonstrated that the phosphodiester TFO formed a sequence-specific triplex with its dsDNA target with an EC50 of ∼1.9 × 10−7 M. The corresponding phosphorothioated oligonucleotide was also effective in this assay with an 8-fold higher EC50 value. Binding of the TFO to the target DNA prevented the binding of rSP-1 and of nuclear proteins in vitro. The TFO could also partially inhibit endogenous MCP-1 gene expression in cultured human embryonic kidney cells. Treatment of TNF-α-stimulated human embryonic kidney 293 cells with the TFO inhibited the secretion of MCP-1 in a dose-dependent manner (up to 45% at 5 μM oligonucleotide). The inhibition of MCP secretion was caused at the level of gene transcription, because MCP-1 mRNA levels in oligonucleotide-treated cells were also decreased by ∼40%.
DOI: 10.1016/s0272-6386(96)90097-9
发表时间: 1996-05-01
影响因子: 13.2
作者:
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通讯作者: Tan, LC
DOI: 10.1093/nar/19.12.3435
发表时间: 1991-06
影响因子: 14.9
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期刊: Laboratory investigation; a journal of technical methods and pathology
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DOI: 10.1006/clin.1996.0105
发表时间: 1996
期刊: Clinical immunology and immunopathology
影响因子: --
作者:
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抗胸腺细胞抗体诱导的肾小球肾炎中单核细胞趋化蛋白-1 表达增加。
DOI: 10.1038/ki.1993.346
发表时间: 1993
影响因子: 19.6
作者:
Stahl,RA;Thaiss,F;Disser,M;Helmchen,U;Hora,K;Schlöndorff,D
通讯作者: Schlöndorff,D