...
首页> 外文期刊>Journal of Cellular Physiology >Effect of 1,25-dihydroxyvitamin D3 on induction of scavenger receptor and differentiation of 12-O-tetradecanoylphorbol-13-acetate-treated THP-1 human monocyte like cells.
【24h】

Effect of 1,25-dihydroxyvitamin D3 on induction of scavenger receptor and differentiation of 12-O-tetradecanoylphorbol-13-acetate-treated THP-1 human monocyte like cells.

机译:1、25-dihydroxyvitamin D3的感应清道夫受体和分化12-O-tetradecanoylphorbol-13-acetate-treatedTHP-1人类单核细胞。

获取原文
获取原文并翻译 | 示例
           

摘要

We investigated the effect of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) on the expression of scavenger receptors in human monocytic cell line (THP-1 cells) treated for 24 h with 12-O-tetradecanoylphorbol-13-acetate (TPA) which induces their differentiation into macrophages. The capacity to degrade 125I-labeled acetyl low density lipoprotein (LDL) was developed in accordance with macrophage differentiation. The treatment with 10 nM 1,25(OH)2D3 for 72 h inhibited the degradation of acetyl LDL by THP-1 macrophages in a dose-dependent manner, suggesting that 1,25(OH)2D3 inhibits scavenging function in macrophages. In order to clarify the mechanism of its inhibitory effect on degradation of acetyl LDL, we performed the ligand binding assay using 125I-labeled acetyl LDL. Scatchard analysis revealed that 1,25(OH)2D3 decreased the number of scavenger receptors without changing the affinity for acetyl LDL. We next examined the effect of 1,25(OH)2D3 on the expression of scavenger receptor mRNA. The mRNA of type I scavenger receptor was first detected in THP-1 cells 4 days after the treatment with TPA, the mRNA level increased up to 6 days, and then decreased. The treatment with 1,25(OH)2D3 for 72 h dramatically decreased the mRNA levels after the acquisition of macrophage phenotypes as evidenced by nonspecific esterase staining. However, 1,25(OH)2D3 did not affect the activity of nonspecific esterase nor the induction of interleukin-1 beta mRNA by lipopolysaccharide in THP-1 macrophages. These findings suggest that 1,25(OH)2D3 exclusively decreases the expression of scavenger receptors in TPA-induced THP-1 macrophages without affecting the basic cellular functions as macrophages.
机译:我们调查的影响1, 25-dihydroxyvitamin D3 (1,25 (OH) 2 D3)上清道夫受体的表达在人类单核细胞的细胞系(THP-1细胞)治疗24h和12-O-tetradecanoylphorbol-13-acetate (TPA)导致他们的区别巨噬细胞。乙酰基低密度脂蛋白(LDL)开发符合巨噬细胞分化。1,25 (OH) 2 d3 72 h抑制退化乙酰THP-1巨噬细胞在低密度脂蛋白方式存在剂量依赖的相关性,表明1,25 (OH) 2 d3抑制清除功能巨噬细胞。其抑制作用降解乙酰基低密度脂蛋白,我们进行了配体结合试验使用125年标乙酰基的低密度脂蛋白。透露,1,25 (OH) 2 d3的数量减少清道夫受体而不改变亲和力乙酰基的低密度脂蛋白。1,25 (OH) 2 d3清道夫的表达受体信使rna。受体在THP-1首次检测到细胞4天与TPA治疗后,信使rna水平增加了6天,然后下降。治疗1,25 (OH) 2 d3 72 h收购后的mRNA水平下降巨噬细胞表型就是明证非特异性酯酶染色。1,25 (OH) 2 d3并不影响的活动非特异性酯酶和诱导interleukin-1βmRNA的脂多糖THP-1巨噬细胞。1,25 (OH) 2 d3只降低了表达式清道夫受体在TPA-induced THP-1巨噬细胞在不影响基本的细胞功能为巨噬细胞。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号