Five ETS family members, ELF-1, ETV-4, ETV-3L, ETS-1, and ETS-2 upregulate human leukocyte-associated immunoglobulin-like receptor-1 gene basic promoter activity.

Five ETS family members, ELF-1, ETV-4, ETV-3L, ETS-1, and ETS-2 upregulate human leukocyte-associated immunoglobulin-like receptor-1 gene basic promoter activity.
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ETS 家族的五个成员 ELF-1、ETV-4、ETV-3L、ETS-1 和 ETS-2 上调人白细胞相关免疫球蛋白样受体 1 基因基本启动子活性

DOI:
10.18632/aging.101475
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发表时间:
2018-06-18
期刊:
Aging
影响因子:
--
通讯作者:
Xue J
Xue J
中科院分区:
其他
文献类型:
--
作者:
Cao Q;Yang S;Lv Q;Liu Y;Li L;Wu X;Qu G;He X;Zhang X;Sun S;Li B;An J;Hu T;Xue J

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人白细胞相关免疫球蛋白样受体-1 (LAIR-1) 是一种免疫抑制性受体,在大多数类型的造血细胞和一些肿瘤细胞上表达。 LAIR-1在免疫细胞成熟、分化和激活中发挥抑制作用。 LAIR-1还与一些自身免疫性疾病和肿瘤有关。然而,LAIR-1基因的调控机制仍不清楚。为了阐明 LAIR-1 调控的分子机制,在本研究中,我们在荧光素酶报告基因检测中使用一系列截短的启动子质粒克隆并表征了 LAIR-1 基因的启动子区域。我们的结果表明,LAIR-1 的基本核心启动子位于相对于翻译起始位点的-256/-8 区域内。我们的进一步研究表明,五个ETS转录因子:ELF-1、ETV-4、ETV-3L、ETS-1和ETS-2可以上调LAIR-1基本启动子活性。其中,ETS-2是最有效的转录因子。此外,ETS-2被证实与LAIR-1的基本启动子直接相互作用。本研究首次描述了能够上调 LAIR-1 启动子活性的区域/因子。这一新知识有助于理解 LAIR-1 相关免疫调节和疾病的分子机制。
Human leukocyte-associated immunoglobulin-like receptor-1 (LAIR-1), an immunoinhibitory receptor, is expressed on most types of hematopoietic cells and some tumor cells. LAIR-1 plays an inhibitory role in immune cell maturation, differentiation, and activation. LAIR-1 is also involved in some autoimmune diseases and tumors. However, the mechanism controlling the regulation of the LAIR-1 gene is still unknown. In order to elucidate the molecular mechanisms involved in LAIR-1 regulation, in the present study, we cloned and characterized the promoter region of LAIR-1 gene using a series of truncated promoter plasmids in luciferase reporter assays. Our results show that the basic core promoter of LAIR-1 is located within the region -256/-8 relative to the translational start site. Our further studies indicate that five ETS transcription factors: ELF-1, ETV-4, ETV-3L, ETS-1 and ETS-2, can up-regulate the LAIR-1 basic promoter activity. Of these, ETS-2 is the most effective transcription factor. Moreover, ETS-2 was confirmed to interact directly with the basic promoter of LAIR-1. This study presents the first description of regions/factors capable of up-regulation the promoter activity of LAIR-1. This new knowledge contributes to understanding of the molecular mechanisms involved in LAIR-1 associated immune regulation and diseases.
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