ULTRASENSITIVE ASSAYS FOR ENDOGENOUS ANTIMICROBIAL POLYPEPTIDES

ULTRASENSITIVE ASSAYS FOR ENDOGENOUS ANTIMICROBIAL POLYPEPTIDES
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DOI:
10.1016/0022-1759(91)90021-7
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发表时间:
1991-03-21
影响因子:
2.2
通讯作者:
EISENHAUER, P
EISENHAUER, P
中科院分区:
医学4区
文献类型:
--
作者:
LEHRER, RI;ROSENMAN, M;EISENHAUER, P

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我们开发了两种灵敏的方法来识别白细胞和其他组织中的抗菌分子。 一种方法使用凝胶覆盖技术,并被设计用于鉴定样品中的抗微生物多肽进行聚丙烯酰胺凝胶电泳。 另一种是径向扩散试验,它允许通过色谱程序获得的多个组分方便地进行抗微生物活性测试。 当我们使用E.大肠杆菌ML-35 p或鼠伤寒沙门氏菌14028 S作为试验菌,在径向扩散试验中,我们常规地在5 μ l样品中检测到5-10 ng的兔防御素NP-1。 通过微小的修改,这两种方法都可以应用于其他生物,包括革兰氏阳性菌,几种念珠菌和新型隐球菌。
We developed two sensitive methods for identifying antimicrobial molecules in leukocytes and other tissues. One method uses a gel overlay technique and was designed to identify antimicrobial polypeptides in samples subjected to polyacrylamide gel electrophoresis. The other, a radial diffusion assay, allows multiple fractions obtained by chromatographic procedures to be tested for antimicrobial activity conveniently. When we used E. coli ML-35p or Salmonella typhimurium 14028S as test organisms in the radial diffusion assay, we routinely detected 5-10 ng of rabbit defensin NP-1 in 5-mu-l of sample. With minor modifications, both methods can be applied to other organisms, including Gram-positive bacteria, several Candida species and Cryptococcus neoformans.