Compositions and methods for aptamer screening
First Claim
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1. A method of identifying at least one aptamer comprising:
- (a) providing a pool of candidate aptamers;
(b) contacting a first at least one biological sample with the pool provided in step (a), wherein the first at least one biological sample comprises a microvesicle population;
(c) identifying a first subpool of candidate aptamers that bound at least one microvesicle in the first at least one biological sample in step (b);
(d) contacting a second at least one biological sample with the pool provided in step (a), wherein the second at least one biological sample comprises a microvesicle population;
(e) identifying a second subpool of candidate aptamers that bound at least one microvesicle in the second at least one biological sample in step (d); and
(f) comparing the members of the first and second subpools of candidate aptamers to identify at least one member of a pool that is overrepresented in one of the subpools versus the other subpool, thereby identifying the at least one aptamer.
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Abstract
Methods are provided for selecting aptamers that are specific to a target of interest from amongst a library of potential aptamer sequences. Aptamers disclosed can be used to detect and/or characterize biological entities of interest, e.g. microvesicles and/or surface antigens. Further disclosed are biomarkers that can be used for diagnosing different disorders including different types of cancer.
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20 Claims
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1. A method of identifying at least one aptamer comprising:
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(a) providing a pool of candidate aptamers; (b) contacting a first at least one biological sample with the pool provided in step (a), wherein the first at least one biological sample comprises a microvesicle population; (c) identifying a first subpool of candidate aptamers that bound at least one microvesicle in the first at least one biological sample in step (b); (d) contacting a second at least one biological sample with the pool provided in step (a), wherein the second at least one biological sample comprises a microvesicle population; (e) identifying a second subpool of candidate aptamers that bound at least one microvesicle in the second at least one biological sample in step (d); and (f) comparing the members of the first and second subpools of candidate aptamers to identify at least one member of a pool that is overrepresented in one of the subpools versus the other subpool, thereby identifying the at least one aptamer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification