
Cell Reports丨CD14在细胞内LPS传感中的独立于TLR4的关键作用
CD14 是一种糖磷脂酰肌醇锚定的质膜蛋白,在 LPS 介导的 TLR4 激活中具有长期确定的作用;CD14 与 LPS 结合并将 LPS 转移到 TLR4-MD2 复合物,从而启动 myddosome 组装和信号转导(Lipopolysaccharide induces alveolar macrophage necrosis via CD14 and the P2X7 receptor leading to interleukin-1α release.
cd14 - 百度百科
CD14,即 LPS (Lipopolysaccharide)受体,最初是一种存在于 单核细胞 、 巨噬细胞 等 细胞表面 的 白细胞 分化抗原,由TODD于1981年首次从人单核细胞表面发现。
CD14 controls the LPS-induced endocytosis of Toll-like Receptor 4
Collectively, these data establish that the natural coexpression of CD14 and TLR4 determines which cell types internalize TLR4 in response to LPS. CD14 mediates the LPS-induced internalization of extracellular macromolecules. In addition to promoting TLR4 endocytosis, LPS induces DCs to undergo rapid macropinocytosis (West et al., 2004). To ...
Lipopolysaccharide (LPS)-binding protein stimulates CD14 ... - PubMed
2018年6月29日 · The secretory form of the CD14 (sCD14) induced internalization but required a much higher concentration than LBP. An inhibitory anti-sCD14 mAb was ineffective for serum-mediated internalization. LBP lacking the domain for LPS transfer to CD14 and a CD14 mutant with reduced LPS binding both attenuated TLR4 internalization.
CD14: Biology and role in the pathogenesis of disease
2019年8月1日 · CD14 binds to Peptidoglycan (PGN) with partially identical conformational binding sites on CD14 compared with LPS and then leads to TLR2-mediated transcription factors NF-κB, CREB/ATF and AP-1 activation in human and mouse monocytes to …
A TLR4-independent critical role for CD14 in intracellular LPS …
2022年5月3日 · Our data show that LPS internalization via CD14 is a consequential event that enables cytosolic translocation of LPS, licensing pyroptotic and IL-1 responses from the host.
An examination of the LPS-TLR4 immune response through the …
2025年3月18日 · The LPS-TLR4 immune response is a critical mechanism in the body's defense against Gram-negative bacterial infections, yet its dysregulation can lead to severe inflammatory diseases. Lipopolysaccharide (LPS), a pivotal pathogen-associated molecular pattern (PAMP) on the surface of gram-negative bacteria, is recognized by Toll-like receptor 4 (TLR4), initiating a complex cascade of immune ...
CD14的介绍:白细胞分化抗原与LPS受体的双重身份解析
缺失突变研究表明,CD14N末端152个氨基酸序列具有完整的结合LPS和介导细胞激活的作用,说明CD14结合LPS和激活细胞的功能区域位于前152个氨基酸以内,其中氨基酸57~64和39~44片断为LPS的结合域,因为将这些区域删除可导致与LPS结合能力完全丧失。 氨基酸7~10,9~13和91~101可能为CD14的激活域,因为删除这些区域后CD14虽能结合LPS,但缺乏激活作用。 此外,CD14分子含有多个N-连接糖基化位点,属糖蛋白。 根据CD14在体内的存在形式,分为存 …
LPS及其细胞因子调控CD14表达的机制探究 - 网易
2024年6月13日 · 低浓度LPS(0.1~1ng/ml)能增加单核细胞结合抗CD14抗体的数量,提示LPS能上调单核/巨噬细胞表面mCD14(膜结合型CD14)的表达。 LPS还能上调多形核白细胞(PMN)内CD14 mRNA表达,并增加培养上清液中sCD14(可溶性CD14)的水平。
CD14—细菌脂多糖的膜受体 - 知乎 - 知乎专栏
cd14是革兰阴性菌内毒素脂多糖lps和lps结合蛋白复合物的高亲和力受体。cd14识别并结合lps,引起细胞酪氨酸磷酸化、核因子nf-κb转位、触发细胞因子释放和氧自由基产生,在机体免疫、防御系统引起的一系列反应中发挥重要作用。