Antibiotics from within: antibacterials from human and animal sources.

Antibiotics from within: antibacterials from human and animal sources.
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内部抗生素:来自人类和动物的抗生素。

DOI:
10.1016/0167-7799(90)90127-j
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发表时间:
1990
影响因子:
17.3
通讯作者:
Elsbach,P
Elsbach,P
中科院分区:
工程技术1区
文献类型:
--
作者:
Elsbach,P

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从人类和动物吞噬细胞中分离出有效的抗菌蛋白和肽,提高了这些“体内抗生素”可用作治疗剂的可能性。必须面对的问题,在交付和对宿主的毒性,但在定义这些天然存在的细胞毒素的细胞毒性作用的结构决定因素的快速进展,提供了新的抗生素类的生物技术开发的基础。有机体在高等生物中,可以区分不同类型的吞噬细胞;多形核白细胞(PMN),许多类型的巨噬细胞和嗜酸性粒细胞。粒相关蛋白的一种成分是髓过氧化物酶(MPO),其本身具有很少或没有细胞毒性活性,但在吞噬细胞的抗微生物功能中起主要作用。MPO放大了伴随吞噬作用的呼吸爆发过程中产生的细胞毒性O2-衍生物的作用,可能是通过帮助它们以及C1-或其他卤离子向具有MPO结合亲和力的靶细胞的递送(参考文献1)。此外,MPO介导的高度re-All生物体的形成存在于充满潜在有害微生物的环境中。然而,在特定动物物种与其微生物病原体之间的自然平衡中,只有相对较少的重大破坏(流行病),这反映了针对严重感染的高度有效的宿主防御系统。在人类中,这一点也很明显,因为我们大多数人在幼儿期之后和生命的最后阶段之前,如果我们的抵抗力没有受到其他疾病的损害,就可以避免重大传染病。
The isolation of potent antibacterial proteins and peptides from human and animal phagocytes has raised the possibility that these'antibiotics from within'can be used as therapeutic agents. Problems in delivery to and toxicity towards the host must be faced, but rapid progress in defining the structural determinants of the cytotoxic action of these naturally occurring cytotoxins provides a basis for biotechnological development of new classes of antibiotics. organisms. In higher organisms, different types of phagocytes can be distinguished; polymorphonuclear leukocytes (PMN), many types of macrophages and eosinophils. One component of the granuleassociated proteins that has little or no cytotoxic activity by itself, but that plays a major role in the phagocyte's antimicrobial functions is myeloperoxidase (MPO). MPO amplifies the effects of the cytotoxic O2-derivatives produced during the respiratory burst that accompanies phagocytosis, presumably by aiding their delivery and that of C1-or other halide ions to target cells with binding affinity for MPO (Ref. 1). In addition, the MPO-mediated formation of highly re-All living organisms exist in an environment teeming with potentially harmful microbes. Nevertheless, there are only relatively few major disruptions (epidemics) in the natural balance between a given animal species and its microbial pathogens, and this reflects a highly effective host-defense system against serious infections. In humans, this is also evident from the fact that most of us escape major infectious disease, after early childhood and before the last stages of our lives, if our resistance is not impaired by other illness.
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DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
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