Integrated nucleic acid analysis
The present invention relates to an integrated method of nucleic acid analysis, and more particularly to a simplified sample pre-treatment, which renders the method more easily automated, where the sample is provided on or applied onto a solid matrix and the subsequent amplification and detection steps are performed in one single, sealed reaction vial without removing the matrix.
1. A method for analyzing a target nucleic acid in a biological sample, comprising the following steps:
a) providing a reaction vial consisting of a single compartment and a closable lid, wherein said reaction vial contains:
i) an absorbent paper matrix;
ii) a biological sample on said absorbent paper matrix, wherein said biological sample comprises said target nucleic acid, and wherein said nucleic acid has not been extracted, washed, and/or eluted from said biological sample;
iii) a reagent mixture for amplifying said nucleic acid;
iv) a reagent mixture for detecting the amplified nucleic acid, and
b) closing the lid of said reaction vial;
c) releasing said nucleic acid from said absorbent paper matrix;
d) amplifying said nucleic acid; and
e) detecting the amplified nucleic acid through the use of a labelled probe as a result of fluorescence resonance energy transfer; wherein:
steps c) through e) are performed in said reaction vial without removing said absorbent paper matrix from said reaction vial and without opening said reaction vial.
2. The method according to claim 1 , wherein said biological material is applied to said absorbent paper matrix prior to transferring said absorbent paper matrix and said biological sample to said reaction vial.
3. The method according to claim 2 , wherein said biological sample is applied to said absorbent paper matrix immediately prior to transferring said absorbent paper matrix and said biological sample to said reaction vial, without drying or storage.
4. The method according to claim 1 , wherein said absorbent paper matrix is transferred to said reaction vial prior to application of said biological sample to said absorbent paper matrix.
5. The method according to claim 1 , wherein said absorbent paper matrix comprises an absorbent material that does not irreversibly bind nucleic acids.
6. The method according to claim 5 , wherein said absorbent paper matrix comprises one or more of a protein binding agent and a protein denaturing agent.
7. The method according to claim 5 , wherein said absorbent paper matrix comprises a chaotropic agent.
8. The method according to claim 1 , wherein in step (a) at least part of said reagent mixture for amplifying nucleic acids and said reagent mixture for detecting amplified nucleic acids are contained in said reaction vial in dried form.
9. The method according to claim 1 , wherein step d) is performed by polymerase chain reaction (PCR).
10. The method according to claim 1 , wherein step e) is performed by hybridizing said amplified nucleic acid to a fluorescently labelled probe.
11. The method according to claim 8 , further comprising adding water to said reaction vial prior to step b).
12. The method according to claim 1 , wherein said target nucleic acid is DNA.
13. The method according to claim 1 , wherein said target nucleic acid is RNA.
14. A method for analyzing a target nucleic acid in one or more biological samples, comprising the following steps:
a) providing a multi-well plate, wherein each well of said multi-well plate consists of a single compartment, and wherein one or more wells of said multi-well plate contain:
i) an absorbent paper matrix;
ii) a biological sample on said absorbent paper matrix, wherein said biological sample comprises said target nucleic acid, and wherein said nucleic acid has not been extracted, washed, and/or eluted from said biological sample;
iii) a reagent mixture for amplifying said nucleic acid; and
iv) a reagent mixture for detecting the amplified nucleic acid;
b) sealing said one or more wells of said multi-well plate;
c) releasing said nucleic acid from said absorbent paper matrix;
d) amplifying said nucleic acid; and
e) detecting the amplified nucleic acid through the use of a labelled probe as a result of fluorescence resonance energy transfer; wherein:
steps c) through e) are performed in said one or more wells of said multi-well plate without removing said absorbent paper matrix from said one or more wells of said multi-well plate and without opening said one or more wells of said multi-well plate.
15. The method according to claim 14 , wherein said biological material is applied to said absorbent paper matrix prior to transferring said absorbent paper matrix and said biological sample to said one or more wells of said multi-well plate.
16. The method according to claim 15 , wherein said biological sample is applied to said absorbent paper matrix immediately prior to transferring said absorbent paper matrix and said biological sample to one or more wells of said multi-well plate, without drying or storage.
17. The method according to claim 14 , wherein said absorbent paper matrix is transferred to said one or more wells of said multi-well plate prior to application of said biological sample to said absorbent paper matrix.
18. The method according to claim 14 , wherein said absorbent paper matrix comprises an absorbent material that does not irreversibly bind nucleic acids.
19. The method according to claim 18 , wherein said absorbent paper matrix comprises one or more of a protein binding agent and a protein denaturing agent.
20. The method according to claim 18 , wherein said absorbent paper matrix comprises a chaotropic agent.
21. The method according to claim 14 , wherein in step a) at least part of said reagent mixture for amplifying nucleic acids and said reagent mixture for detecting amplified nucleic acids are contained in said one or more wells of said multi-well plate in dried form.
22. The method according to claim 14 , wherein step d) is performed by polymerase chain reaction (PCR).
23. The method according to claim 14 , wherein step e) is performed by hybridizing said amplified nucleic acid to a fluorescently labelled probe.
24. The method according to claim 21 , further comprising adding water to said one or more wells of said multi-well plate prior to step b).
25. The method according to claim 14 , wherein said target nucleic acid is DNA.
26. The method according to claim 14 , wherein said target nucleic acid is RNA.
27. The method according to claim 1 , wherein said biological sample is blood.