Using heparan sulfate octadecasaccharide (18-mer) as a multi-target agent to protect against sepsis.
Using heparan sulfate octadecasaccharide (18-mer) as a multi-target agent to protect against sepsis.
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使用硫酸乙酰肝素十八糖(18-mer)作为多靶点药物来预防败血症。
DOI:
10.1073/pnas.2209528120
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发表时间:
2023-01-24
影响因子:
11.1
通讯作者:
中科院分区:
文献类型:
--
作者:
Heparin is a mixture of sulfated polysaccharides with different sizes of sugar chains and sulfation patterns. As a commonly used anticoagulant drug, heparin also displays protection against sepsis in animal models and sepsis patients, but the benefit of heparin in human clinical trials is controversial. Our hypothesis is that using structurally homogeneous oligosaccharides will improve the efficacy against sepsis and enhance the understanding of the mechanism of action. Here, we demonstrate that an octadecasaccharide (18-mer) inhibits the inflammatory responses of the host animals to achieve protection against sepsis. The findings open a chemical space to design therapeutic agents to treat sepsis. Sepsis is a lethal syndrome manifested by an unregulated, overwhelming inflammation from the host in response to infection. Here, we exploit the use of a synthetic heparan sulfate octadecasaccharide (18-mer) to protect against sepsis. The 18-mer not only inhibits the pro-inflammatory activity of extracellular histone H3 and high mobility group box 1 (HMGB1), but also elicits the anti-inflammatory effect from apolipoprotein A-I (ApoA-I). We demonstrate that the 18-mer protects against sepsis-related injury and improves survival in cecal ligation and puncture mice and reduces inflammation in an endotoxemia mouse model. The 18-mer neutralizes the cytotoxic histone-3 (H3) through direct interaction with the protein. Furthermore, the 18-mer enlists the actions of ApoA-I to dissociate the complex of HMGB1 and lipopolysaccharide, a toxic complex contributing to cell death and tissue damage in sepsis. Our study provides strong evidence that the 18-mer mitigates inflammatory damage in sepsis by targeting numerous mediators, setting it apart from other potential therapies with a single target.
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