期刊
BIOTECHNOLOGY LETTERS
卷 30, 期 5, 页码 829-834出版社
SPRINGER
DOI: 10.1007/s10529-007-9629-6
关键词
aptamer blotting; cancer diagnosis; competitor; DNA aptamer; sensor element; VEGF165
Two DNA aptamers against a tumor marker protein, human vascular endothelial growth factor (VEGF(165)) were identified. In the screening process, another protein was used as the competitor to isolate those aptamers that have high specificity for the target. In addition, we evaluated the affinities of the enriched library by means of aptamer blotting. The isolated aptamers bound to VEGF(165) with a K (d) value in the range of a few hundred nanomoles, and did not bind to the competitor. This selection method enabled us to efficiently select the specific aptamers against the target protein. These specific aptamers would be useful sensor elements for cancer diagnosis.
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