Selective Suppression of CCAAT/Enhancer-binding Protein β Binding and Cyclooxygenase-2 Promoter Activity by Sodium Salicylate in Quiescent Human Fibroblasts*

Selective Suppression of CCAAT/Enhancer-binding Protein β Binding and Cyclooxygenase-2 Promoter Activity by Sodium Salicylate in Quiescent Human Fibroblasts*
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水杨酸钠在静止的人成纤维细胞中选择性抑制 CCAAT/增强子结合蛋白 β 结合和环氧合酶 2 启动子活性*

DOI:
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发表时间:
2001
影响因子:
4.8
通讯作者:
Kenneth K. Wu
Kenneth K. Wu
中科院分区:
生物学2区
文献类型:
--
作者:
M. Saunders;L. Sansores;D. Gilroy;Kenneth K. Wu

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水杨酸盐的抗炎作用不能通过抑制环氧合酶(COX)活性来解释。本研究表明,治疗浓度的水杨酸钠通过抑制 CCAAT/增强子结合蛋白 β 与其 COX-2 启动子区域的结合,抑制由佛波醇 12-肉豆蔻酸酯 13-乙酸酯和白细胞介素 1β 诱导的 COX-2 基因转录。相比之下,水杨酸盐不会抑制肿瘤坏死因子α对核因子κB依赖性COX-2的诱导。水杨酸钠的抑制作用仅限于去血清的静止细胞。这些发现表明,与目前水杨酸盐通过抑制核因子κB发挥作用的观点相反,阿司匹林和水杨酸盐的药理作用是通过抑制CCAAT/增强子结合蛋白β结合和反式激活来介导的。这些发现对水杨酸盐作用机制的概念理解以及新药的发现和设计产生了重大影响。
The anti-inflammatory actions of salicylates cannot be explained by inhibition of cyclooxygenase (COX) activity. This study demonstrates that sodium salicylate at a therapeutic concentration suppressed COX-2 gene transcription induced by phorbol 12-myristate 13-acetate and interleukin 1β by inhibiting the binding of CCAAT/enhancer-binding protein β to its promoter region of COX-2. By contrast, salicylate did not inhibit nuclear factor κB-dependent COX-2 induction by tumor necrosis factor α. The inhibitory effect of sodium salicylate was restricted to serum-deprived quiescent cells. These findings indicate that contrary to the current view that salicylate acts via inhibition of nuclear factor κB the pharmacological actions of aspirin and salicylates are mediated by inhibiting CCAAT/enhancer-binding protein β binding and transactivation. These findings have a major impact on the conceptual understanding of the mechanism of action of salicylates and on new drug discovery and design.
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