ArticleNan fang yi ke da xue xue bao = Journal of Southern Medical University2016
[A colorimetric method for vascular endothelial growth factor detection based on aptamer and magnetic beads].
Article in Nan fang yi ke da xue xue bao = Journal of Southern Medical University, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors at 1 institution in 1 country.
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Abstract
objectiveTo develop a novel colorimetric method for detecting the tumor biomarker vascular endothelial growth factor (VEGF) based on aptamer and magnetic beads.
methodsThe capture aptamer was hybridized to urease functionalized single-stranded DNA (ssDNA) and immobilize on the surface of magnetic beads by specific biotin-avidin binding. In the presence of VEGF, aptamers bound to VEGF to form a specific stem-loop structure to release the urease functionalized ssDNA. After separation, the supernatant was transferred to a tube and urea and phenol red were added. Urease hydrolyzed urea to produce ammonia to cause an increase of the pH value and a color change of phenol red. The results were inspected with either the naked eyes or by a UV spectrophotometer.
resultsUnder optimized conditions, the detection system showed a good linear relationship for VEGF detection in the range of 0.1 to 10 pmol/L with a detection limit as low as 0.06 pmol/L. The results of VEGF detection in the serum of patients with lung cancer were consistent with those using an ELISA Kit. The results of examination of 10 serum samples with this aptamer-based method and ELISA kit showed that the accuracy of this method was 90%.
conclusionThis aptamer-based system provides an simple and convenient method for VEGF detection with a high sensitivity and selectivity.
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28219865PMC6779658W2998995330What OpenQuestion holds
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