多肽抗生素在免疫系统中的作用

The role of antimicrobial peptides in immune system

多种动物的免疫系统中都含有多肽抗生素。这些多肽抗生素具有广泛的抗菌谱。它们不仅能杀灭革兰阴性及阳性细菌 ,还能杀伤耐药的细菌、真菌、病毒和寄生虫。这些多肽抗生素可以与体内的其他分子协同作用 ,杀灭病原体。它们与细菌的产物有高度的亲和性 ,因此可以在败血症所引起的炎症反应中起调节作用。多肽抗生素还具有调动炎性细胞的能力。

Many species of animals contain antimicrobial peptides as components of their immune systems. Many antimicrobial peptides have a broad spectrum of activity not only against gram negative and gram positive bacteria but also against antibiotic resistant bacteria, fungi, viruses, and parasites. Such peptides can act in synergy with other host molecules to kill pathogens. It has been found that certain peptides have a high affinity for bacterial products, allowing them to modulate the host inflammatory response to sepsis. They have also been found that they have the ability to recruit inflammatory cells. These properties as well as some other functions of antimicrobial peptides enable them to have an important impact in innate immunity.