The present invention relates to a group of small peptides in the action of anti - clinical multidrug resistant bacteria. Its characteristic is that the small peptide of the group has the effect of anti - clinical isolation of multidrug resistant bacteria. In vitro activity assay showed that 11 small peptides showed different antibacterial activities against a variety of clinical multidrug-resistant bacteria. According to different bacteria, their MIC value was between 4~128 and g/L. Compared with the master plate, it enhanced the activity of Pseudomonas aeruginosa and Candida albicans. The selection in vivo antibacterial activity of 6 peptide results showed that the 6 peptides can decrease by Pseudomonas aeruginosa strains and clinical pan resistant Pseudomonas aeruginosa sepsis model mice mortality, and hormone and polymyxin has synergistic effect; concentration of 6 small peptides without hemolysis reaction in 10 mg /ml, the product of high safety; rabbit conjunctival local stimulation. The experimental results show that the group of small peptide no acute toxicity response.
【技术实现步骤摘要】
抗临床多重耐药菌小肽
本专利技术属于生物医药领域,具体地说涉及一组抗临床多重耐药菌的小肽。
技术介绍
随着第一支青霉素在20世纪40年代的使用,抗生素的发展在人类医学史上具有重要的意义,挽救了无数的生命,使人的预期寿命增加了十年以上。但是随着人们对抗生素的广泛使用,细菌也逐渐适应并对其产生了耐药性。随着时间的推移,临床上对多种抗生素耐药的细菌越来越常见,出现了临床多重耐药菌(multipleresistantbacteria,MDR)。根据美国疾病控制中心(CDC)提供的数据,早在1980年到1992年之间,由于耐药菌的出现,传染病的平均死亡率上升了58%,使传染病成为心脏病和癌症之后的第三大杀手。在临床多重耐药菌中,革兰阴性杆菌占较大比例,如肺炎克雷伯氏菌、大肠杆菌、绿脓杆菌、阴沟杆菌、粘质沙雷菌、枸橼酸菌属、志贺菌属、沙门菌属等;其中,肺炎克雷伯氏菌、大肠杆菌及绿脓杆菌占多重耐药菌的80%以上;此外,革兰阳性菌中有甲氧西林耐药葡萄球菌(MRS),万古霉素耐药肠球菌(VRE);近年来,重症监护室(ICU)中的真菌(如白色念珠菌)的耐药率也逐年增高;因此,寻找新型 ...
【技术保护点】
一种小肽及其适用于药用的盐,其特征在于其氨基酸序列如下任意一条:T1.Gly‑Ser‑Lys‑Lys‑Pro‑Val‑Pro‑Ile‑Ile‑Tyr‑Cys‑Gln‑Arg‑Arg‑Thr‑Gly‑Lys‑Cys‑Gln‑Arg‑Met;T2. Gly‑Ser‑Lys‑Lys‑Pro‑Val‑Pro‑Ile‑Ile‑Tyr‑Cys‑Asn‑Arg‑Arg‑Ala‑Gly‑Lys‑Cys‑Gln‑Arg‑Met;T3. Gly‑Ser‑Lys‑Lys‑Pro‑Val‑Pro‑Ile‑Ile‑Tyr‑Cys‑Asn‑Arg‑Arg‑Thr‑Ala‑Lys‑Cys‑Gln‑Arg ...
【技术特征摘要】
1.一种小肽及其适用于药用的盐,其特征在于其氨基酸序列如下任意一条:T1.Gly-Ser-Lys-Lys-Pro-Val-Pro-Ile-Ile-Tyr-Cys-Gln-Arg-Arg-Thr-Gly-Lys-Cys-Gln-Arg-Met;T2.Gly-Ser-Lys-Lys-Pro-Val-Pro-Ile-Ile-Tyr-Cys-Asn-Arg-Arg-Ala-Gly-Lys-Cys-Gln-Arg-Met;T3.Gly-Ser-Lys-Lys-Pro-Val-Pro-Ile-Ile-Tyr-Cys-Asn-Arg-Arg-Thr-Ala-Lys-Cys-Gln-Arg-Met;T8.Gly-Ser-Lys-Lys-Pro-Val-Pro-Ile-Ile-Tyr-Cys-Asn-Lys-Arg-Thr-Gly-Lys-Cys-Gln-Arg-Met;T9.Gly-Ser...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。