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
中科院分区:
文献类型:
--
作者:
LEHRER, RI;ROSENMAN, M;EISENHAUER, P
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.