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Cholesterol: Significance and Regulation01:29

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Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
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其他相关的7-氧醇有差异性Upregulate Cd14表达方式

Bo-Young Kim1, Yonghae Son1, Byoung Joon Kim2,3

  • 1Department of Pharmacology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea.

International journal of molecular sciences
|July 14, 2023
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概括

动脉样硬化病变显示CD14的表达增加,与7-oxysterols相关. 这些化合物,特别是7α-基胆固醇,在单细胞细胞中调节CD14,影响炎症和细胞迁移.

关键词:
七氧化醇是7氧化醇的组成部分.CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14 CD14在MMP-9中,它是MMP-9的.在 THP-1 细胞中.这是一种炎症炎症炎症炎症.

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科学领域:

  • 生物化学 生物化学
  • 免疫学 免疫学 免疫学
  • 细胞生物学 细胞生物学

背景情况:

  • 在动脉样硬化病变中,CD14表达升高,这些病变部位富含7-oxysterols.
  • 在血管细胞中调节CD14表达方面,7-氧醇的确切作用尚不清楚.

研究的目的:

  • 为了研究特定的7-oxysterols (7α-hydroxycholesterol, 7β-hydroxycholesterol, 7-ketocholesterol) 对THP-1单细胞中CD14表达的作用.
  • 阐明7-氧醇调节CD14水平和相关细胞功能的机制.

主要方法:

  • 用不同的7-oxysterols对待THP-1细胞.
  • 量化了CD14转录和蛋白质水平.
  • 评估了可溶性CD14 (sCD14) 释放和单细胞细胞对脂多糖的反应.
  • 测量了矩阵金属蛋白酶-9 (MMP-9) 活性,并评估了MMP-9抑制剂对sCD14释放的影响.

主要成果:

  • 所有三种测试的7-氧醇都增加了CD14转录和蛋白质水平,并促进了sCD14从THP-1细胞释放.
  • 7α-基胆固醇证明了CD14表达的最强诱导.
  • 7α-基胆固醇调高了膜结合的CD14,增强了脂多糖诱导的CCL2产生和单细胞细胞迁移.
  • 七氧醇增加了MMP-9的活性,抑制MMP-9显著降低了sCD14的释放.

结论:

  • 7-氧醇在血管细胞中差异性诱导CD14表达.
  • 这些发现表明,7-oxysterols通过不同的,但重叠的,涉及MMP-9的机制,促进单细胞CD14表达.
  • 这项研究强调了氧代谢与动脉样硬化的炎症过程之间的潜在联系.