Isolation of living cells and preparation of cell lines based on detection and quantification of preselected cellular ribonucleic acid sequences
First Claim
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1. A method for generating a cell nine expressing at least one RNA of interest, comprising the steps of:
- a) introducing into cells DNA encoding said at least one RNA of interest;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization to said at least one RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA of interest and nucleotides mutually complementary;
c) isolating said cells that fluoresce; and
d) generating a cell line expressing said at least one RNA of interest by growing said isolated cells.
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Abstract
The invention is directed to reliable and efficient detection of mRNAs as well as other RNAs in living cells and its use to identify and, if desired, separate cells based on their desired characteristics. Such methods greatly simplify and reduce the time necessary to carry out previously-known procedures, and offers new approaches as well, such as selecting cells that generate a particular protein or antisense oligonucleotide, generating cell lines that express multiple proteins, generating cell lines with knock-out of one or more protein, and others.
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Citations
33 Claims
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1. A method for generating a cell nine expressing at least one RNA of interest, comprising the steps of:
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a) introducing into cells DNA encoding said at least one RNA of interest;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization to said at least one RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA of interest and nucleotides mutually complementary;
c) isolating said cells that fluoresce; and
d) generating a cell line expressing said at least one RNA of interest by growing said isolated cells. - View Dependent Claims (3, 5, 22, 23, 24, 25, 26, 27)
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2. A method for generating a cell line that expresses two or more RNA molecules of interest, comprising the steps of:
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a) introducing into cells DNA encoding a first RNA of interest;
b) introducing into said cells DNA encoding at least one additional RNA of interest;
c) exposing said cells to at least one molecular beacon that fluoresces upon hybridization to said first RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the first RNA of interest and nucleotides mutally complementary;
d) exposing said cells to at least one molecular beacon that, fluoresces upon hybridization to said at least one additional RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the additional RNA of interest and nucleotides mutually complementary;
e) isolating cells that exhibit fluorescence upon hybridization of said molecular beacons to their respective RNA of interest; and
f) generating a cell line expressing said two or more RNA molecules of interest by growing said isolated cells. - View Dependent Claims (4, 15)
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6. A method for generating a cell line expressing an RNA of interest, comprising the steps of:
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a) introducing into cells DNA encoding said at least one RNA of interest and at least one epitope tag;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with the RNA transcript of an epitope tag, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of the epitope tag and nucleotides mutually complementary;
c) isolating said cells that fluoresce; and
d) generating a cell line expressing said RNA of interest by growing said isolated cells. - View Dependent Claims (9, 12, 13, 14)
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7. A method for generating a cell line expressing two or more RNA molecules of interest, comprising the steps of:
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a) introducing into cells a first DNA encoding a first RNA of interest and at least one epitope tag;
b) introducing into said cells DNA encoding at least one additional RNA of interest and at least one epitope tag;
c) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with the RNA transcript of an epitope tag for said first RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of the epitope tag and nucleotides mutually complementary;
d) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with the RNA transcript of an epitope tag for said at least one additional RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of said epitope tag and nucleotides mutually complementary;
e) isolating cells that exhibit fluorescence upon hybridization of said molecular beacons with their respective RNA transcripts; and
f) generating a cell line expressing said two or more RNA molecules of interest by growing said isolated cells. - View Dependent Claims (10)
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8. A method for generating a cell line expressing two or more RNA molecules of interest, comprising the steps of:
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a) introducing into cells DNA encoding two or more RNA molecules of interest, wherein the DNA encoding at least one of said RNA molecules of interest further encodes at least one epitope tag;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with an RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA of interest and nucleotides mutually complementary, and at least one molecular beacon that fluoresces upon hybridization with the RNA transcript of an epitope tag, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of an epitope tag and nucleotides mutually complementary;
c) isolating said cells that fluoresce; and
d) generating a cell line expressing said two or more RNA molecules of interest by growing said isolated cells. - View Dependent Claims (11)
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16. A method for generating a cell line that overexpresses an RNA of interest comprising the steps of:
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a) introducing into cells a first DNA encoding said RNA of interest and a first epitope tag; and
at least one additional DNA encoding said RNA of interest and a second epitope tag, wherein the first and second epitope tags are different;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with said RNA transcript of said first epitope tag, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of said first epitope tag and nucleotides mutually complementary, and to at least one molecular beacon that fluoresces upon hybridization with the RNA transcript of said second epitope tag, wherein said molecular beacon comprises nucleotides complementary to the RNA transcript of said second epitope tag and nucleotides mutually complementary;
c) isolating cells that exhibit fluorescence of at least one of said molecular beacons; and
d) generating a cell line overexpressing said RNA of interest by growing said isolated cells. - View Dependent Claims (17, 18, 19, 20, 21)
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28. A method for isolating cells expressing at least one RNA of interest comprising the steps of:
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a) providing cells potentially expressing said at least one RNA of interest;
b) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with said at least one RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the RNA of interest and nucleotides mutually complementary;
c) isolating said cells that fluoresce. - View Dependent Claims (29, 30, 31, 32, 33)
d) exposing said cells to at least one molecular beacon that fluoresces upon hybridization with said at least one additional RNA of interest, wherein said molecular beacon comprises nucleotides complementary to the additional RNA of interest and nucleotides mutually complementary; and
e) isolating cells exhibiting fluorescence upon hybridization of said molecular beacon with said additional RNA of interest.
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30. The method of claim 28 or 29, wherein the step of isolating said cells that fluoresce is carried out using fluorescence-activated cell sorter technology.
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31. The method of claim 29, wherein said steps are performed either simultaneously or sequentially with the corresponding steps in claim 28.
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32. The method of claim 28 or 29, wherein the RNA of interest comprises one or more of a messenger RNA that encodes a protein, an antisense RNA molecule, a structural RNA, a ribosomal RNA, an hnRNA and an snRNA.
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33. The method of claim 32, wherein said protein is selected from the group consisting of a cell surface-localized protein and an intracellular protein.
Specification