Peptidoglycans promotes human leukemic THP-1 cell apoptosis and differentiation.

Peptidoglycans promotes human leukemic THP-1 cell apoptosis and differentiation.
复制标题

肽聚糖促进人白血病 THP-1 细胞凋亡和分化。

DOI:
10.7314/apjcp.2012.13.12.6409
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发表时间:
2012
期刊:
Asian Pac J Cancer Prev
影响因子:
--
通讯作者:
Hu, Jin-Yue
Hu, Jin-Yue
中科院分区:
其他
文献类型:
--
作者:
Li, Wei;Luo, Ke-Lin;Chen, Jian-Jun;Hu, Jin-Yue

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先天免疫系统协调对病原体的炎症反应。为了做到这一点,它的细胞必须区分自我和非自我利用受体,这些受体识别微生物专门合成的分子。Toll样受体在检测哺乳动物和昆虫的微生物感染中具有至关重要的作用。在哺乳动物中,它们已经进化到能够识别微生物代谢所特有的保守产物。这些包括脂多糖(LPS)、脂技术酸和肽聚糖(PGN)。我们在这里显示,TLR,包括TLR 2,表达的THP-1人白血病细胞系。PGN激活THP-1细胞TLR 2信号通路,诱导THP-1细胞合成多种可溶性因子和蛋白,包括IL-1β、IL-8和TNF-α,并诱导THP-1细胞凋亡,且呈剂量和时间依赖性。此外,在这项研究中,我们表明,PGN诱导THP-1细胞凋亡的TNF-α依赖的方式。这些发现表明,TLR 2信号传导导致级联反应,导致肿瘤细胞凋亡和分化,这可能表明在某些癌症中使用TLR 2激动剂作为细胞毒性剂的新的临床前景。
The innate immune system coordinates the inflammatory response to pathogens. To do so, its cells must discriminate self from non-self utilizing receptors that identify molecules synthesized exclusively by microbes. Toll- like receptors have a crucial role in the detection of microbial infection in mammals and insects. In mammals, they have evolved to recognize conserved products unique to microbial metabolism. These include lipopolysaccharide (LPS), lipotechoic acids, and peptidoglycans (PGN). We show here that TLRs, including TLR2, are expressed on the THP-1 human leukemia cell line. Activation of TLR2 signaling in THP-1 by PGN induces the synthesis of various soluble factors and proteins including interleukin-1β, interleukin-8 and TNF-α and apoptosis of THP-1 with PGN dose and time dependence. Moreover , in this study we show that PGN induces apoptosis of THP-1 cells in a TNF-α-dependent manner. These findings indicate that TLR2 signaling results in a cascade leading to tumor apoptosis and differentiation, which may suggest new clinical prospects using TLR2 agonists as cytotoxic agents in certain cancers.
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