Methods and systems for detection and isolation of a nucleotide sequence
First Claim
1. A method for detecting and/or isolating a target nucleic acid molecule having a homopolymeric sequence comprising:
- a) treating a sample containing nucleic acid molecules with a lysis buffer comprising a chaotropic agent;
b) treating the sample under high stringency hybridization conditions using low salt concentration with an LNA oligonucleotide covalently attached to a solid support and comprising at least twenty repeating consecutive nucleotides;
c) performing a washing step to remove excess material, wherein said homopolymeric sequence is a poly(A) tail of a eukaryotic mRNA.
0 Assignments
0 Petitions
Accused Products
Abstract
A method for isolating nucleic acid molecules having a repeating nucleotide sequence or a homopolymeric nucleotide sequence, e.g. a poly A stretch, is described. In particular, the method uses oligomeric capture probes spiked with various amounts of locked nucleic acid (LNA). The invention further describes methods for the isolation of RNA molecules, for example polyadenylated mRNA molecules, which overcome the problems of rapid RNA degradation during isolation and analysis of such nucleic acid molecules. This is of major clinical and diagnostic importance, especially when dealing with RNA viruses, such as retroviruses or when analyzing rare or low-abundant mRNAs or mRNAs from biopsies or tissues enriched with RNases.
14 Citations
140 Claims
-
1. A method for detecting and/or isolating a target nucleic acid molecule having a homopolymeric sequence comprising:
-
a) treating a sample containing nucleic acid molecules with a lysis buffer comprising a chaotropic agent;
b) treating the sample under high stringency hybridization conditions using low salt concentration with an LNA oligonucleotide covalently attached to a solid support and comprising at least twenty repeating consecutive nucleotides;
c) performing a washing step to remove excess material, wherein said homopolymeric sequence is a poly(A) tail of a eukaryotic mRNA. - View Dependent Claims (6, 7, 8, 9, 13, 14, 15, 17, 22, 24, 25, 26, 29, 30, 31, 32, 33, 34, 35, 36, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 53, 56, 57, 58, 59, 60, 77, 79, 116, 117, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140)
-
-
2-5. -5. (canceled)
-
10-12. -12. (canceled)
-
16. (canceled)
-
18-21. -21. (canceled)
-
23. (canceled)
-
27-28. -28. (canceled)
-
37-38. -38. (canceled)
-
49-52. -52. (canceled)
-
54-55. -55. (canceled)
-
61-76. -76. (canceled)
- 78. (canceled)
-
81-115. -115. (canceled)
-
118-127. -127. (canceled)
Specification