Compositions and assays to detect seasonal H3 influenza A virus nucleic acids
Methods for detecting the presence or absence of the swine H1N1 influenza A virus, seasonal H1 influenza A virus and/or seasonal H3 influenza A virus nucleic acids in biological samples are disclosed. Compositions that are target-specific nucleic acid sequences and kits comprising target-specific nucleic acid oligomers for amplifying in vitro the swine H1N1 influenza A virus, seasonal H1 influenza A virus and/or seasonal H3 influenza A virus nucleic acid and detecting amplified nucleic acid sequences are disclosed.
1. A composition comprising: (a) a first seasonal H3 influenza A-specific amplification primer selected from the group consisting of: SEQ ID NO:77, SEQ ID NO:88, SEQ ID SEQ ID NO:96, SEQ ID NO:99, and a nucleotide sequence 19-50 nucleotides in length, wherein the nucleotide sequence consists of SEQ ID NO:77, SEQ ID NO:88, SEQ ID NO:92, SEQ ID NO:96 or SEQ ID NO:99 at the 3′ end and one or more nucleotides at the 5′ end that do not encode a portion of the H3 protein of the H3 seasonal influenza A or a complementary sequence thereof, or a DNA equivalent thereof; (b) a second seasonal H3 influenza A-specific amplification primer selected from the group consisting of: SEQ ID NO:78, SEQ ID NO:89, SEQ ID NO:93, SEQ ID NO:97, SEQ ID NO:100, and a nucleotide sequence 18-50 nucleotides in length, wherein the nucleotide sequence consists of SEQ ID NO:78, SEQ ID NO:89, SEQ ID NO:93, SEQ ID NO:97, SEQ ID NO:100 at the 3′ end and one or more nucleotides at the 5′ end that do not encode a portion of the H3 protein of the H3 seasonal influenza A or a complementary sequence thereof, or a DNA equivalent thereof; and (c) a seasonal H3 influenza A-specific oligonucleotide detection probe comprising a nucleic acid sequence comprising at least 18 contiguous nucleotides encoding the H3 protein from seasonal H3 influenza A or a complementary sequence thereof, or a DNA equivalent thereof, wherein a detectable label is operably linked to the oligonucleotide detection probe.
2. The composition according to claim 1 wherein the oligonucleotide detection probe comprises a nucleotide sequence selected from the group consisting of: SEQ ID NO:79, SEQ ID NO:80, SEQ ID NO:81, SEQ ID NO:90, SEQ ID NO:94, SEQ ID NO:95, SEQ ID NO:98, SEQ ID NO:101, and SEQ ID NO:102, or an RNA equivalent thereof.
3. The composition according to claim 1 , wherein the first amplification primer, the second amplification primer, the oligonucleotide detection probe, or a combination thereof, has one or more nucleotides at the 5′ end that do not encode a portion of the H3 protein of the H3 seasonal influenza A or a complementary sequence thereof, or a DNA equivalent thereof.
4. The composition according to claim 2 , wherein said amplification primers are SEQ ID NO:99 and SEQ ID NO:100 and the nucleic acid sequence of said detection probe is SEQ ID NO:102.
5. The composition of claim 1 , wherein (a) the first amplification primer consists of: SEQ ID NO:77, SEQ ID NO:88, SEQ ID NO:92, SEQ ID NO:96, or SEQ ID NO:99, (b) the second amplification primer consists of SEQ ID NO:78, SEQ ID NO:89, SEQ ID NO:93, SEQ ID NO:97, or SEQ ID NO:100; and (c) the oligonucleotide detection probe comprises SEQ ID NO:79, SEQ ID NO:80, SEQ ID NO:81, SEQ ID NO:90, SEQ ID NO:94, SEQ ID NO:95, SEQ ID NO:98, SEQ ID NO:101, or SEQ ID NO:102.
6. The composition of claim 1 , wherein
(a) the first amplification primer consists of SEQ ID NO:77 and the second amplification primer consists of SEQ ID NO:78;
(b) the first amplification primer consists of SEQ ID NO:88 and the second amplification primer consists of SEQ ID NO:89;
(c) the first amplification primer consists of SEQ ID NO:92 and the second amplification primer consists of SEQ ID NO:93;
(d) the first amplification primer consists of SEQ ID NO:96 and the second amplification primer consists of SEQ ID NO:97; or
(e) the first amplification primer consists of SEQ ID NO:99 and the second amplification primer consists of SEQ ID NO:100.
7. A kit comprising, in a suitable container, a composition according to claim 1 , and instructions for use of said composition in any assay for amplification of polynucleotides in a biological sample.
8. A method for the detection of an influenza A virus from a sample, comprising the steps of:
(a) contacting an influenza A virus nucleic acid from a sample with a composition according to claim 1 ;
(b) providing conditions for amplifying the nucleic acid from step a by a polymerase chain reaction to generate an amplification product from the nucleic acid; and
(c) detecting the presence or absence of amplification product from step b, wherein the presence of the amplification product indicates that the sample contained an influenza A virus.
9. The method according to claim 8 , wherein the detecting step is selected from the group consisting of a real-time detecting step and a taqman PCR detecting step.
10. The method of claim 8 , wherein at step (a) the influenza A virus nucleic acid is contacted with a composition according to one of Mixtures 2 to 5 and 16 to 23.
11. The method according to claim 10 , wherein the detecting step is selected from the group consisting of a real-time detecting step and a taqman PCR detecting step.
12. A method for the detection of a seasonal H3 Influenza A Virus from a sample, comprising the steps of:
(a) contacting a seasonal H3 Influenza A Virus nucleic acid from the sample with a primer pair comprising a first amplification primer and a second amplification primer wherein:
(i) the first amplification primer consists of SEQ ID NO:77 and the second amplification primer consists of SEQ ID NO:78;
(ii) the first amplification primer consists of SEQ ID NO:88 and the second amplification primer consists of SEQ ID NO:89;
(iii) the first amplification primer consists of SEQ ID NO:92 and the second amplification primer consists of SEQ ID NO:93;
(iv) the first amplification primer consists of SEQ ID NO:96 and the second amplification primer consists of SEQ ID NO:97; or
(v) the first amplification primer consists of SEQ ID NO:99 and the second amplification primer consists of SEQ ID NO:100,
(b) providing conditions for amplifying the nucleic acid from step (a) by a polymerase chain reaction to generate an amplification product from the nucleic acid; and
(c) detecting the presence or absence of amplification product from step (b), wherein the presence of the amplification product indicates that the sample contained a seasonal H3 Influenza A Virus.
13. The method according to claim 12 , wherein the detecting step is selected from the group consisting of a real-time detecting step and is a taqman PCR detecting step.
14. The method according to claim 12 , wherein the detecting step uses an oligonucleotide detection probe having a nucleic acid sequence selected from the group consisting of: SEQ ID NO:79, SEQ ID NO:80, SEQ ID NO:81, SEQ ID NO:90, SEQ ID NO:94, SEQ ID NO:95, SEQ ID NO:98, SEQ ID NO:101, and SEQ ID NO:102, or an RNA equivalent thereof.
15. The method according to claim 12 , wherein the amplifying step is a multiplex amplification reaction that further comprises a primer pair from Table 1, a primer pair from Table 2, or a primer pair from Table 1 and a primer pair from Table 2.
16. The method according to claim 15 , wherein the detecting step further comprises a probe from Table 1, a probe from Table 2, or a probe from Table 1 and a probe from Table 2.
17. The composition according to claim 3 , wherein the one or more nucleotides at the 5′ end encode a promoter sequence.
18. The composition according to claim 1 , wherein the detectable label comprises a fluorophore.
19. The composition according to claim 18 , wherein the oligonucleotide detection probe further comprises a quencher.