Sperm cell separation methods and compositions containing aptamers or nucleic acid sequences for use therein
First Claim
1. An isolated non-naturally occurring nucleic acid sequence that binds to a target molecule accessible from the surface of a mammalian sperm cell comprisinga nucleotide sequence selected from the group consisting of SEQ ID NOS:
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Abstract
The present invention provides an aptamer or pool of aptamers (nucleic acid sequences) that bind(s) to a target molecule on the surface, accessible from the surface or inside of a mammalian sperm cell and a method for producing the aptamers. The method comprises contacting a collection of different nucleic acid molecules with the target molecule under conditions favorable for binding between at least one of the nucleic acid molecules and the target molecule, to form at least one complex comprising the nucleic acid molecule bound to the target molecule, wherein each of the nucleic acid molecules comprises at least one segment of randomized nucleotide sequences. The complexes are then separated from the unbound nucleic acid molecules and unbound target molecules, and the bound nucleic acid molecule is recovered from the separated complex. The aptamers are used to separate sperm cells based upon sperm cell qualities, such as whether the cells contain X chromosomes or Y chromosomes.
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Citations
13 Claims
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1. An isolated non-naturally occurring nucleic acid sequence that binds to a target molecule accessible from the surface of a mammalian sperm cell comprising
a nucleotide sequence selected from the group consisting of SEQ ID NOS:
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12. A method for separating X sperm cells and Y sperm cells comprising the steps of:
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(a) contacting a mixed population of X and Y sperm cells with a nucleic acid sequence comprising a nucleotide sequence selected from the group consisting of SEQ ID NOS;
3-35,which nucleic acid sequence preferentially binds to the X sperm cells to form bound nucleic acid-X sperm cell complexes;(b) separating the X sperm cells from the original mixed sperm cell population leaving a Y containing rich sperm cell population; (c) optionally releasing the bound X sperm cells from the nucleic acid sequence-X sperm cell complexes; and (d) recovering the X sperm cells or the Y sperm cells. - View Dependent Claims (13)
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Specification