Selection of aptamers against live E.coli cells using Cell SELEX.

Date

2010-12

Authors

Shipley, Sheena.

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Worldwide access.
Access changed 6-21-13.

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Abstract

Aptamers are oligonucleotides that bind with great specificity and affinity to a target molecule. These oligonucleotides are produced through the course of Systemic Evolution of Ligands by Exponential Enrichment (SELEX). SELEX is a combinatorial chemistry technique used to generate a random DNA or RNA library, which is then incubated with a target molecule. The binding aptamers are divided from the nonbinding random pool DNA/aptamers, and then amplified via polymerase chain reaction (PCR). Double stranded DNA molecules have been used to select against purified target molecules; in this study we have developed a selection technique using live Escherichia coli cells as a target and using Bacillus subtilis and Enterobacter aerogenes as negative controls. Aptamer pools obtained from approximately 8 rounds of Cell SELEX demonstrated an affinity for E .coli cells when tested via fluorescence detection.

Description

Includes bibliographical references (p. ).

Keywords

Aptamers., E.coli., Cell SELEX.

Citation