畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (2): 361-366.doi: 10.11843/j.issn.0366-6964.2016.02.020

• 预防兽医 • 上一篇    下一篇

抗菌肽JH-3的抑菌活性及其稳定性分析

魏晓晓,杭柏林*,马翠,夏一赫,张冰清,王青,徐彦召,胡建和*   

  1. (河南科技学院动物科学学院,新乡 453003)
  • 收稿日期:2015-07-08 出版日期:2016-02-23 发布日期:2016-02-23
  • 通讯作者: 胡建和,E-mail:hujianhe@hist.edu.cn;杭柏林,E-mail:yzhbl001@126.com
  • 作者简介:魏晓晓(1990-),女,河南商丘人,硕士生,主要从事动物病原与新兽药的研究,E-mail:weixiaoxiao926@163.com
  • 基金资助:

    国家自然科学基金项目(31372469);河南省科技计划项目(142300410142);河南省高校科技创新团队支持计划(15IRTSTHN);河南科技学院2015年大学生创新训练计划项目(2015CX035);教育部2015年国家级大学生创新创业训练项目(201510467005)

Analysis of Antimicrobial Activity and Stability of Antibacterial Peptide JH-3

WEI Xiao-xiao,HANG Bo-lin*,MA Cui,XIA Yi-he,ZHANG Bing-qing,WANG Qing,XU Yan-zhao,HU Jian-he*   

  1. (College of Animal Science and Veterinary Medicine,Henan Institute of Science and Technology,Xinxiang 453003,China)
  • Received:2015-07-08 Online:2016-02-23 Published:2016-02-23

摘要:

对牛血红蛋白源抗菌肽P3进行氨基酸改造,并了解改造后抗菌肽JH-3的抑菌活性和稳定性。通过微量稀释法检测了抗菌肽JH-3的最小抑菌浓度(MIC),通过扫描电镜观察了细菌和真菌形态的变化,测定了抗菌肽JH-3的溶血性、热稳定性、酸碱稳定性和盐稳定性。结果表明:抗菌肽JH-3对革兰阳性菌(金黄色葡萄球菌、猪链球菌2型)的MIC为6.25~25 μg•mL-1,对革兰阴性菌(大肠杆菌、猪霍乱沙门菌、副猪嗜血杆菌、胸膜肺炎放线杆菌)的MIC为3.125~50 μg•mL-1,对真菌(白色念珠菌)的MIC为12.5 μg•mL-1,均具有良好的抗菌活性。经抗菌肽JH-3处理后,大肠杆菌细胞表面出现皱缩、孔洞;金黄色葡萄球菌出现菌体皱缩,细胞的完整性受到破坏;白色念珠菌细胞表面出现凹陷、突出、裂痕。在 6~100倍MIC时312.5 μg•mL-1抗菌肽JH-3的溶血率仅12.84%;75~100 ℃的高温、80~100 mmol•L-1的高浓度NaCl和pH 4.0及pH 10.0的高酸碱性对抗菌肽JH-3的抑菌活性没有明显的影响。研究结果为抗菌肽JH-3的临床应用提供了理论基础,且抗菌肽JH-3有替代抗生素成为新抗菌药物的潜力。

Abstract:

The aim of the present study was to modify antimicrobial peptide P3 from bovine hemoglobin on amino acid,and to know the antibacterial activity and stability of the antibacterial peptide JH-3 modified based on P3.The minimum inhibitory concentrations (MIC) of JH-3 against several bacteria were detected with the method of serial dilution.The morphology changes of bacterial and fungus were observed by scanning electron microscope (SEM).The hemolytic activity,thermal stability,acid base stability and salt stability of the antibacterial peptide JH-3 were determined.The results showed that the MIC of JH-3 against gram positive bacteria (Staphylococcus aureusStreptococcus suis 2 type) was between 6.25-25 μg•mL-1.The MIC against Gram negative bacteria (Escherichia coliSalmonella choleraesuisHaemophilus parasuisActinobacillus pleuropneumoniae) was between 3.125-50 μg•mL-1.The MIC against fugus (Monilia albicans) was 12.5 μg•mL-1.Shrinkage and holes appeared on the surface of treated E.coli cells.Shrinkage and incomplement presented on the cell surface of S.Aureus.And M.albican showed sunken,protruding and crack.Hemolytic rate of JH-3 was only 12.84% at 312.5 μg•mL-1 (6-100 times MIC).At the condition of 75-100 ℃,80-100 mmol•L-1 NaCl,pH 4 and pH 10,the antimicrobial activity of JH-3 was not changed significantly.These findings provided theoretical basis for the clinical application of antimicrobial peptide JH-3,and antibacterial peptide JH-3 has the potential as the new antibacterial drugs instead of antibiotics.

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