Method for generating a three-dimensional nucleic acid containing matrix
Methods of making a three-dimensional matrix of nucleic acids within a cell is provided.
1. A method for analysis, comprising:
(a) providing a biological sample comprising a plurality of cells, wherein a cell of said plurality of cells comprises a plurality of cellular nucleic acids;
(b) generating a three-dimensional matrix comprising cellular nucleic acids of said plurality of cellular nucleic acids or derivatives of said cellular nucleic acids, wherein said cellular nucleic acids or derivatives of said cellular nucleic acids have a three-dimensional position in said three-dimensional matrix; and
(c) detecting signals from said cellular nucleic acids or derivatives of said cellular nucleic acids to identify said three-dimensional position in said three-dimensional matrix.
2. The method of claim 1 , further comprising, prior to (b), permeabilizing said cell.
3. The method of claim 2 , wherein (b) comprises contacting said cell with a matrix-forming material and using said matrix-forming material to form said three-dimensional matrix.
4. The method of claim 3 , wherein said three-dimensional matrix is a cross-linked or polymer matrix.
5. The method of claim 3 , wherein said three-dimensional matrix comprises polyacrylamide, cellulose, alginate, polyamide, cross-linked agarose, cross-linked dextran, or cross-linked polyethylene glycol.
6. The method of claim 3 , wherein (b) further comprises exposing said matrix-forming material to a polymerization inducing catalyst, ultraviolet (UV) light, or a functional cross-linker.
7. The method of claim 3 , wherein said matrix-forming material comprises a polymer, wherein said three-dimensional polymer matrix is generated at least in part by crosslinking said polymer.
8. The method of claim 3 , wherein said matrix-forming material comprises a plurality of monomers, and wherein said three-dimensional matrix is generated at least in part by polymerizing said plurality of monomers.
9. The method of claim 1 , further comprising, prior to (b), generating a plurality of amplicons from said cellular nucleic acids.
10. The method of claim 9 , wherein said derivatives of said cellular nucleic acids comprise amplicons of said plurality of amplicons and (b) comprises generating said three-dimensional matrix comprising said amplicons, wherein said amplicons have said three-dimensional position in said three-dimensional matrix.
11. The method of claim 10 , wherein (b) comprises covalently attaching said amplicons to said three-dimensional matrix thereby substantially retaining said three-dimensional position of said amplicons in said three-dimensional matrix.
12. The method of claim 10 , wherein said amplicons comprise a functional moiety and wherein said amplicons are covalently attached to said three-dimensional matrix via said functional moiety.
13. The method of claim 12 , wherein said functional moiety comprises an amine, an acrydite, an alkyne, a biotin, an azide, or a thiol.
14. The method of claim 12 , wherein said amplicons comprising said functional moiety are generated by performing a nucleic acid amplification reaction in the presence of a modified nucleotide comprising said functional moiety such that said modified nucleotide is incorporated into said amplicons.
15. The method of claim 14 , wherein said modified nucleotide comprises uracil.
16. The method of claim 12 , wherein said functional moiety is covalently cross-linked to said three-dimensional matrix to covalently attach said amplicons to said three-dimensional matrix.
17. The method of claim 16 , further comprising using a cross-linker to covalently attach said amplicons to said three-dimensional matrix, wherein said cross-linker comprises a reactive group that reacts with said functional moiety.
18. The method of claim 17 , wherein said reactive group comprises an imidoester, a succinimide ester, a maleimide, a carbodiimide, or a phenyl azide.
19. The method of claim 17 , wherein said cross-linker further comprises a spacer.
20. The method of claim 19 , wherein said spacer comprises polyethylene glycol, a carbon backbone, or a photo-cleavable moiety.
21. The method of claim 12 , wherein said functional moiety is co-polymerized with matrix-forming material to covalently attach said amplicons to said three-dimensional matrix.
22. The method of claim 21 , wherein said functional moiety comprises acrydite and wherein said matrix forming material comprises an acrylamide.
23. The method of claim 10 , wherein said amplicons are labelled with detectable labels, and wherein (c) comprises detecting signals from said detectable labels.
24. The method of claim 23 , wherein said detectable labels are fluorescent labels.
25. The method of claim 23 , wherein detecting signals from said detectable labels comprises imaging.
26. The method of claim 23 , wherein said signals are detected in a plurality of optical sections to identify said three-dimensional position in said three-dimensional matrix.
27. The method of claim 23 , further comprising generating a visualization comprising a three-dimensional reconstruction of said three-dimensional position in said three-dimensional matrix.
28. The method of claim 2 , further comprising, prior to permeabilizing said cell, using a fixative to substantially fix said cellular nucleic acids.
29. The method of claim 10 , wherein (c) comprises sequencing said amplicons.
30. A method for analysis, comprising:
(a) providing a biological sample comprising a plurality of cells, wherein a cell of said plurality of cells comprises a plurality of cellular nucleic acids;
(b) generating a plurality of amplicons from said plurality of cellular nucleic acids;
(c) generating a three-dimensional matrix comprising amplicons of said plurality of amplicons, wherein said amplicons are covalently attached to said three-dimensional matrix, and wherein said amplicons have a three-dimensional position in said three-dimensional matrix; and
(d) hybridizing fluorescently labeled oligonucleotides to said amplicons and imaging said amplicons to identify said three-dimensional position in said three-dimensional matrix.
31. The method of claim 29 , wherein said amplicons are generated through rolling circle amplification of circularized probes.