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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Identification and biological activity of ogipeptins, novel LPS inhibitors produced by marine bacterium
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Identification and biological activity of ogipeptins, novel LPS inhibitors produced by marine bacterium

机译:ogipeptins的鉴定和生物活性,海洋细菌产生的新型LPS抑制剂

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摘要

A library of secondary metabolites from microorganisms was screened to identify novel inhibitors against lipopolysaccharide (LPS), a strong stimulant of innate immunity. Novel cyclic peptides, ogipeptin A, B, C and D, were identified in the culture broth of the marine bacterium Pseudoalteromonas sp. SANK 71903. These compounds blocked LPS binding to the cluster of differentiation 14 (CD14) in vitro with IC50 values of 4.8, 6.0, 4.1 and 5.6 nm, respectively, and attenuated tumor necrosis factor-alpha secretion from LPS-stimulated macrophage-like cells. These compounds also displayed antimicrobial activity against Escherichia coli with minimum inhibitory concentrations ranging from 0.25 mu g ml(-1) to 1 mu g ml(-1). Thus, novel antibiotics that inhibited LPS-induced innate immune reactions were identified in this study.
机译:筛选来自微生物的次级代谢物库,以鉴定针对脂多糖(LPS)的新型抑制剂,是先天免疫的强烈兴奋剂。 在海洋细菌假序列菌培养物Sp的培养液中鉴定了新的环状肽,ogipeptina,b,c和d。 SANK 71903.这些化合物在体外阻断LPS与分化14(CD14)的簇,分别为4.8,6.0,4.1和5.6nm的IC 50值,并减弱来自LPS刺激的巨噬细胞样细胞的肿瘤坏死因子-α分泌物 。 这些化合物还针对大肠杆菌的抗微生物活性显示,最小抑制浓度范围为0.25μgml(-1)至1μgmm(-1)。 因此,在本研究中鉴定了抑制LPS诱导的先天免疫反应的新型抗生素。

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