WO2007011903A2 - Analyzing messenger rna and micro rna in the same reaction mixture - Google Patents
Analyzing messenger rna and micro rna in the same reaction mixture Download PDFInfo
- Publication number
- WO2007011903A2 WO2007011903A2 PCT/US2006/027757 US2006027757W WO2007011903A2 WO 2007011903 A2 WO2007011903 A2 WO 2007011903A2 US 2006027757 W US2006027757 W US 2006027757W WO 2007011903 A2 WO2007011903 A2 WO 2007011903A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- primer
- self
- target
- hot start
- complementary stem
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
- C12Q1/686—Polymerase chain reaction [PCR]
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6809—Methods for determination or identification of nucleic acids involving differential detection
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
- C12Q1/6848—Nucleic acid amplification reactions characterised by the means for preventing contamination or increasing the specificity or sensitivity of an amplification reaction
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
- C12Q1/6853—Nucleic acid amplification reactions using modified primers or templates
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2549/00—Reactions characterised by the features used to influence the efficiency or specificity
- C12Q2549/10—Reactions characterised by the features used to influence the efficiency or specificity the purpose being that of reducing false positive or false negative signals
- C12Q2549/101—Hot start
Definitions
- Hot-start methods which use a heat labile material, such as wax, to separate or sequester reaction components are described in U.S. Patent Number 5,411,876.
- the application of such hot-start approaches to reverse transcription have proven challenging. For example, many reverse transcriptases are not heat-stabile.
- the present teachings provide a method of forming a messenger RNA (mRNA) primer extension product and a micro RNA primer extension product in the same reaction mixture comprising; forming a reverse transcription reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region; hybridizing the micro RNA primer to the target micro RNA at a low temperature; extending the micro RNA primer at the low temperature to form a micro RNA extension product, wherein the self- complementary stem of the mRNA primer is substantially non-denatured; raising the temperature to a high temperature, wherein the self-complementary stem of the hot start mRNA primer is substantially denatured; hybridizing the target specific region of the hot start mRNA primer to
- pre-amplifying refers to a process wherein a multiplexed PCR is performed, followed by a plurality of lower-plex decoding PCRs.
- primers employed in the multiplexed PCR correspond to the primers employed in the plurality of lower-plex decoding PCRs.
- Illustrative teachings of such approaches can be found in WO2004/051218 to Andersen and Ruff, U.S. Patent 6,605,451 to Xtrana, and U.S. Non-Provisional Application 11/090,830 to Andersen et al., and U.S. Non-Provisional Application 11 ,090,468 to Lao et al.,
- the term "blunt-ended self-complementary stem” refers to an aspect of a hot start primer that is double-stranded and hybridizes to itself at a low temperature.
- the stem is blunt-ended, in that there are not any overlapping, non-hybridized nucleotides, at the end of the hot start primer when the rest of the nucleotides in the stem are hybridized in base-pairs.
- nucleotides are those in which the nucleotide base is a purine, a 7-deazapurine, a pyrimidine, or an analog thereof.
- Nucleotide 5'-triphosphate refers to a nucleotide with a triphosphate ester group at the 5 1 position, and are sometimes denoted as "NTP", or "dNTP” and “ddNTP” to particularly point out the structural features of the ribose sugar.
- the triphosphate ester group may include sulfur substitutions for the
- a non hot-start primer can be employed that nonetheless comprises a self-complementary stem and a loop.
- Such primers will normally have a single-stranded target specific region that can hybridize to its corresponding target at a low temperature. Additional discussion of such primers can be found for example in U.S. Non-Provisional Applications to Chen et al., 0/947,460 and 11/142,720.
- Figure 1 depicts a scenario in which a non hot-start primer for a micro RNA target comprises a self-complementary stem, a loop, and single stranded target specific region, is present in a reaction mixture along with a hot start mRNA primer.
- the length of the stem of the hot start primer can vary according to the context of the application. For example, when the target-specific region of the hot start primer is G:C rich, the length of the stem region can be shorter.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Zoology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Immunology (AREA)
- Biotechnology (AREA)
- Biophysics (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Physics & Mathematics (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
The present teachings provide methods, compositions, and kits for performing primer extension reactions on at least two target polynucleotides in the same reaction mixture. In some embodiments, a reverse transcription reaction is performed on a first target polynucleotide with a hot start primer comprising a self-complementary stem and a loop, and extension products form at high temperatures but extension products form less so at low temperatures since the self-complementary stem of the hot start primer prevents hybridization of the target specific region to the target. However, non-hot start primers with free target specific regions can hybridize to their corresponding targets at the low temperature and extension can happen at the low temperature.
Description
Analyzing Messenger RNA And Micro RNA In The Same Reaction Mixture
FIELD
The present teachings relate to primer-extension mediated methods of synthesizing nucleic acids.
INTRODUCTION
The integrity of primer-mediated methods of synthesizing nucleic acids can be compromised by non-specific hybridization of primer to inappropriate target polynucleotides. The analysis of nucleic acids is benefited by approaches that minimize the generation of mis-extension products. For example, 'hot-start' approaches have been employed in PCR, where inhibition of polymerase activity has been achieved. For example, U.S. Patent Number 5,338,671 describes the use of antibodies specific for a thermostable DNA polymerase to inhibit the DNA polymerase activity at low temperatures. Chemical treatment with citraconic anhydride is another way hot-start PCR has been achieved (see U.S. Patent Number 5,773,258 and U.S. Patent Number 5,677,152). Hot-start methods which use a heat labile material, such as wax, to separate or sequester reaction components are described in U.S. Patent Number 5,411,876. The application of such hot-start approaches to reverse transcription have proven challenging. For example, many reverse transcriptases are not heat-stabile.
Analysis of expressed nucleic acids can be difficult in small and limited samples. Approaches that multiplex nucleic acid analyses are of growing importance in the biomedical research community.
SUMMARY
In some embodiments, the present teachings provide a method of forming a messenger RNA (mRNA) primer extension product and a micro RNA primer extension product in the same reaction mixture comprising; forming a reverse transcription reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region; hybridizing the micro RNA primer to the target micro RNA at a low temperature; extending the micro RNA primer at the low temperature to form a micro RNA extension product, wherein the self- complementary stem of the mRNA primer is substantially non-denatured; raising the temperature to a high temperature, wherein the self-complementary stem of the hot start mRNA primer is substantially denatured; hybridizing the target specific region of the hot start mRNA primer to the target mRNA at the high temperature; extending the hot start mRNA primer at the high temperature to form a mRNA extension product; and, forming the mRNA primer extension product and the micro RNA primer extension product in the same reaction mixture.
In some embodiments, the present teachings provide a method of forming a first primer extension product and a second primer extension product in the same reaction mixture comprising; forming a primer extension reaction mixture comprising a first primer, a hot start second primer, a first target, a second target, and a primer extending enzyme, wherein the hot start second primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary
stem comprises a target specific region and a quencher region; hybridizing the first primer to the first target at a low temperature; extending the first primer at the low temperature to form a first primer extension product, wherein the self-complementary stem of the hot start second primer is substantially non-denatured; raising the temperature to a high temperature, wherein the self-complementary stem of the hot start second primer is substantially denatured; hybridizing the target specific region of the hot start second primer to the second target at the high temperature; extending the hot start second primer at the high temperature to form a second target extension product; and, forming the first primer extension product and the second primer extension product in the same reaction mixture.
In some embodiments, the present teachings provide a reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt- ended self-complementary stem comprises a target specific region and a quencher region, wherein the self-complementary stem of the hot start mRNA primer is substantially non-denatured at a low temperature, and wherein the self- complementary stem of the hot start mRNA primer is substantially denatured at a high temperature.
In some embodiments, the present teachings provide a reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt- ended self-complementary stem comprises a target specific region and a quencher
region, wherein the self-complementary stem of the hot start mRNA primer is non- denatured at a low temperature, and wherein the self-complementary stem of the hot start mRNA primer is denatured at a high temperature.
In some embodiments, the present teachings provide a kit for forming a messenger RNA (mRNA) primer extension product and a micro RNA (miRNA) primer extension product in the same reaction mixture comprising; a hot start mRNA primer, a micro RNA primer, and optionally a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region, wherein the self-complementary stem is substantially non-denatured at a low temperature, wherein the low temperature is less than 27C, and wherein the self-complementary stem is substantially denatured at a high temperature, wherein the high temperature is between 35C-60C.
These and other features of the present teachings are set forth herein.
DESCRIPTION OF THE DRAWINGS
Figure 1 depicts one illustrative embodiment according to the present teachings.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the scope of the current teachings. In this application, the use of the singular includes the plural unless specifically stated otherwise. For example, "a
forward primer" means that more than one forward primer can be present; for example, one or more copies of a particular forward primer species, as well as one or more different forward primer species. Also, the use of "comprise", "contain", and "include", or modifications of those root words, for example but not limited to, "comprises", "contained", and "including", are not intended to be limiting. The term and/or means that the terms before and after can be taken together or separately. For illustration purposes, but not as a limitation, "X and/or Y" can mean "X" or "Y" or "X and Y".
The section headings used herein are for organizational purposes only and are not to be construed as limiting the described subject matter in any way. All literature and similar materials cited in this application, including, patents, patent applications, articles, books, treatises, and internet web pages are expressly incorporated by reference in their entirety for any purpose. In the event that one or more of the incorporated literature and similar defines or uses a term in such a way that it contradicts that term's definition in this application, this application controls. While the present teachings are described in conjunction with various embodiments, it is not intended that the present teachings be limited to such embodiments. On the contrary, the present teachings encompass various alternatives, modifications, and equivalents, as will be appreciated by those of skill in the art.
SOME DEFINITIONS
As used herein, the term "hot start primer" refers to a primer comprising a self- complementary stem and a loop, wherein the self-complementary stem comprises a target specific region and a quencher region. At low temperatures, the target- specific region is hybridized to the quencher region. At high temperatures, the
target-specific region is not hybridized to the quencher region, and can hybridize to the corresponding target polynucleotide, thereby allowing for a hot-start extension reaction. In some embodiments, the self-complementary stem is blunt-ended, such that there is not a nucleotide overlap at the 5' or 31 end of the self-complementary stem. In some embodiments, the mRNA primer comprises a nearly blunt-ended self- complementary stem, such as for example a single 31 nucleotide overhang. Generally, such 3' overhangs will be of minimal length to avoid undesired priming on targets prior to the melting of the self-complementary stem region by the high temperature. Overhangs on the 5' end are generally more tolerable, since extension does not proceed from the 5' of a sequence.
As used herein, the term "pre-amplifying" refers to a process wherein a multiplexed PCR is performed, followed by a plurality of lower-plex decoding PCRs. Typically the primers employed in the multiplexed PCR correspond to the primers employed in the plurality of lower-plex decoding PCRs. Illustrative teachings of such approaches can be found in WO2004/051218 to Andersen and Ruff, U.S. Patent 6,605,451 to Xtrana, and U.S. Non-Provisional Application 11/090,830 to Andersen et al., and U.S. Non-Provisional Application 11 ,090,468 to Lao et al.,
As used herein, the term "denaturing" refers to the melting of two complementary nucleic acid strands, and is typically achieved by elevating the temperature. In some embodiments, denaturing can be achieved by the addition of base (e.g. -NaOH) or other approaches for dissociating nucleic acids that are familiar to one of ordinary skill in the art of molecular biology.
As used herein, the term "complementary" refers to nucleic acid sequences that are capable of forming Watson-Crick base-pairs. For example, a self-
W
complementary primer comprises a self-complementary stem which is capable of forming Watson-Crick base-pairs with itself at a low temperature. When at the low temperature, the strands of such a self-complementary stem are said to be hybridized to one another. When at a high temperature, the strands of such a self- complementary stem are not hybridized to each other, and the target specific region of the self-complementary stem can be hybridized with a target. In this application, a statement that one sequence is complementary to another sequence encompasses situations in which the two sequences have slight mismatches. Here, the term "sequence" encompasses, but is not limited to, nucleic acid sequences, polynucleotides, oligonucleotides, probes, primers, primer-specific regions, and target-specific regions. Despite the mismatches, the two sequences should selectively hybridize to one another under appropriate conditions.
As used herein, the term "blunt-ended self-complementary stem" refers to an aspect of a hot start primer that is double-stranded and hybridizes to itself at a low temperature. In some embodiments, the stem is blunt-ended, in that there are not any overlapping, non-hybridized nucleotides, at the end of the hot start primer when the rest of the nucleotides in the stem are hybridized in base-pairs. In some embodiments, the stem has one, or two, or as many as three overlapping nucleotides, and possibly more, but for the purposes of the present teachings such a molecule can still be considered "blunt-ended." Thus, small overlaps, which are not expected to prime extension of a target when the rest of the stem is double-stranded, are within the scope of blunt-ended self-complementary stems of the hot start primers provided by the present teachings.
As used herein, the term "target polynucleotide" refers to a polynucleotide sequence that is sought to be reverse transcribed. The target polynucleotide can be obtained from any source, and can comprise any number of different compositional components. For example, the target can be nucleic acid (e.g. DNA or RNA), transfer RNA, siRNA, and can comprise nucleic acid analogs or other nucleic acid mimic, though typically the target will be messenger RNA (mRNA) and/or micro RNA (miRNA). The target can be methylated, non-methylated, or both. The target can be bisulfite-treated and non-methylated cytosines converted to uracil. Further, it will be appreciated that "target polynucleotide" can refer to the target polynucleotide itself, as well as surrogates thereof, for example amplification products, and native sequences. In some embodiments, the target polynucleotide is a short DNA molecule derived from a degraded source, such as can be found in for example but not limited to forensics samples (see for example Butler, 2001 , Forensic DNA Typing: Biology and Technology Behind STR Markers. The target polynucleotides of the present teachings can be derived from any of a number of sources, including without limitation, viruses, prokaryotes, eukaryotes, for example but not limited to plants, fungi, and animals. These sources may include, but are not limited to, whole blood, a tissue biopsy, lymph, bone marrow, amniotic fluid, hair, skin, semen, biowarfare agents, anal secretions, vaginal secretions, perspiration, saliva, buccal swabs, various environmental samples (for example, agricultural, water, and soil), research samples generally, purified samples generally, cultured cells, and lysed cells. It will be appreciated that target polynucleotides can be isolated from samples using any of a variety of procedures known in the art, for example the Applied Biosystems ABI Prism ™ 6100 Nucleic Acid PrepStation, and the ABI Prism ™ 6700 Automated Nucleic Acid Workstation, Boom et al., U.S. Patent 5,234,809., mirVana
RNA isolation kit (Ambion), etc. It will be appreciated that target polynucleotides can be cut or sheared prior to analysis, including the use of such procedures as mechanical force, sonication, restriction endonuclease cleavage, or any method known in the art. In general, the target polynucleotides of the present teachings will be single stranded, though in some embodiments the target polynucleotide can be double stranded, and a single strand can result from denaturation.
As used herein, the term "nucleotide" refers to a compound comprising a nucleotide base linked to the C-V carbon of a sugar, such as ribose, arabinose, xylose, and pyranose, and sugar analogs thereof. The term nucleotide also encompasses nucleotide analogs. The sugar may be substituted or unsubstituted. Substituted ribose sugars include, but are not limited to, those riboses in which one or more of the carbon atoms, for example the 2'-carbon atom, is substituted with one or more of the same or different Cl, F, -R, -OR, -NR2 or halogen groups, where each R is independently H, CrCβ alkyl or C5-Ci4 aryl. Exemplary riboses include, but are not limited to, 2'-(C1 -C6)alkoxyribose, 2'-(C5 -C14)aryloxyribose, 2',3'- didehydroribose, 2'-deoxy-3'-haloribose, 2l-deoxy-3'-fluororibose, 2'-deoxy-3'- chlororibose, 2'-deoxy-3'-aminoribose, 2'-deoxy-3'-(C1 -C6)alkylribose, 2'-deoxy-3'- (C 1 -C6)alkoxyribose and 2'-deoxy-3'-(C5 -C14)aryloxyribose, ribose, 2'- deoxyribose, 2',3'-dideoxyribose, 2'-haloribose, 2'-fluororibose, 2'-chlororibose, and
2'-alkylribose, e.g., 2'-O-methyl, 4'-α-anomeric nucleotides, 1 '-α-anomeric
nucleotides, 2'-4'- and 3'-4'-linked and other "locked" or "LNA", bicyclic sugar modifications (see, e.g., PCT published application nos. WO 98/22489, WO 98/39352;, and WO 99/14226). Exemplary LNA sugar analogs within a polynucleotide include, but are not limited to, the structures:
2'-4' LNA 3'-4' LNA
where B is any nucleotide base.
Modifications at the 2'- or 3'-position of ribose include, but are not limited to, hydrogen, hydroxy, methoxy, ethoxy, allyloxy, isopropoxy, butoxy, isobutoxy, methoxyethyl, alkoxy, phenoxy, azido, amino, alkylamino, fluoro, chloro and bromo. Nucleotides include, but are not limited to, the natural D optical isomer, as well as the L optical isomer forms (see, e.g., Garbesi (1993) Nucl. Acids Res. 21 :4159-65; Fujimori (1990) J. Amer. Chem. Soc. 112:7435; Urata, (1993) Nucleic Acids Symposium Ser. No. 29:69-70). When the nucleotide base is purine, e.g. A or G, the ribose sugar is attached to the N9-position of the nucleotide base. When the nucleotide base is pyrimidine, e.g. C, T or U, the pentose sugar is attached to the N1- position of the nucleotide base, except for pseudouridines, in which the pentose sugar is attached to the C5 position of the uracil nucleotide base (see, e.g., Kornberg and Baker, (1992) DNA Replication, 2nd Ed., Freeman, San Francisco, CA).
One or more of the pentose carbons of a nucleotide may be substituted with a phosphate ester having the formula:
various oxygens, e.g. α-thio-nucleotide 5'-triphosphates. For a review of nucleotide
chemistry, see: Shabarova, Z. and Bogdanov, A. Advanced Organic Chemistry of Nucleic Acids, VCH, New York, 1994.
Figure 1 depicts a method of forming a messenger RNA (mRNA) primer extension product and a micro RNA primer extension product in the same reaction mixture according to some embodiments of the present teachings.
In Figure 1 (A), a reaction mixture is shown comprising a micro RNA target (1) a mRNA target (2), a micro RNA primer (3), and a mRNA primer (4), at a low temperature, for example 25C room temperature. The mRNA primer (4) is a hot start primer, and comprises a loop (5) and a self-complementary stem (6), wherein the self complementary stem comprises a target specific region (7) and a quencher region (8). The 3' end of the target specific region (7) of the mRNA primer (4) is depicted. The poly-A tail at the 3' end of the mRNA target (2) is depicted as a series of A's.
In Figure 1 (B), the micro RNA primer (3) hybridizes to the micro RNA target (1) and is extended (bold arrow), while the hot start mRNA primer (4) remains
substantially non-denatured, and cannot hybridize to its corresponding mRNA target at the low temperature.
In Figure 1 (C), the reaction mixture is heated to a high temperature, for example 42C, and the hot start mRNA primer (4) is denatured, thus liberating the target-specific region (7) from the quencher region (8), with the loop (5) shown disposed therein. Also depicted in Figure 1 (C) is the micro RNA extension product (9) and the target mRNA (2)
In Figure 1 (D), the target specific region (7) of the hot start mRNA primer (4) is shown hybridized to the mRNA target (2) and is extended (bold arrow). The quencher region (8) and the loop (5) of the hot start mRNA primer, which are single- stranded, are also depicted.
In some embodiments, the architecture of the hot start primer can differ from that depicted in Figure 1. For example, the loop (6) of the hot start primer shown in Figure 1 can itself form part of the target-specific region of the hot start primer. It will be appreciated that one of skill in the art would be able to make these and other minor modifications in the design of the hot start primer provided by the present teachings, and still be within their scope.
One of skill in the art will appreciate that the methods, compositions, and kits of the present teachings can be useful in a variety of contexts in which primer- extension on different target polynucleotides is desired to be performed in the same reaction mixture. In some embodiments of the present teachings, messenger RNA and micro RNA can be reverse transcribed using the methods of the present teachings. In some embodiments, the messenger RNA and micro RNA can be
found in a small sample, for example a small sample derived from laser capture microdissection.
Certain methods of optimizing reverse transcription and amplification reactions are known to those skilled in the art. For example, it is known that PCR may be optimized by altering times and temperatures for annealing, polymerization, and denaturing, as well as changing the buffers, salts, and other reagents in the reaction composition. Optimization may also be affected by the design of the amplification primers used. For example, the length of the primers, as well as the G- C:A-T ratio may alter the efficiency of primer annealing, thus altering the amplification reaction. Descriptions of amplification optimization can be found in, among other places, James G. Wetmur, "Nucleic Acid Hybrids, Formation and Structure," in Molecular Biology and Biotechnology, pp.605-8, (Robert A. Meyers ed., 1995); McPherson, particularly in Chapter 4; Rapley; and Protocols & Applications Guide, rev. 9/04, Promega.
In some embodiments, the present teachings contemplate single-tube RT-
PCR approaches, and discussed for example in Mohamed et al., (2004) Journal of Clinical Virology, 30:150-156. In some embodiments, the reverse transcription products of the present teachings can be amplified in a multiplexed pre-amplifying PCR followed by a plurality of lower-plex decoding PCRs, as described for example in WO2004/051218 to Andersen and Ruff, U.S. Patent 6,605,451 to Xtrana, and U.S. Non-Provisional Application 11/090,830 to Andersen et al., and U.S. Non-Provisional Application 11 ,090,468 to Lao et al., Thus in some embodiments, the present teachings provide a method of quantifying a messenger RNA (mRNA) and a micro RNA from a small sample comprising; forming a reverse transcription reaction
mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region; hybridizing the micro RNA primer to the target micro RNA at a low temperature; extending the micro RNA primer at the low temperature to form a micro RNA extension product, wherein the self-complementary stem of the hot start mRNA primer is substantially non-denatured; raising the temperature to a high temperature, wherein the self-complementary stem of the hot start mRNA primer is substantially denatured; hybridizing the target specific region of the hot start mRNA primer to the target mRNA at the high temperature; extending the hot start mRNA primer at the high temperature to form a mRNA extension product; forming the mRNA primer extension product and the micro RNA primer extension product in the same reaction mixture; pre-amplifying the mRNA primer extension product and the micro RNA primer extension product in a pre-amplificatoin PCR; performing a first decoding PCR on the mRNA primer extension product and a second decoding PCR on the micro RNA primer extension product; and, quantifying the mRNA and the micro RNA from the small sample.
In some embodiments of the present teachings, a non hot-start primer can be employed that nonetheless comprises a self-complementary stem and a loop. Such primers will normally have a single-stranded target specific region that can hybridize to its corresponding target at a low temperature. Additional discussion of such primers can be found for example in U.S. Non-Provisional Applications to Chen et al., 0/947,460 and 11/142,720. Figure 1 depicts a scenario in which a non hot-start primer for a micro RNA target comprises a self-complementary stem, a loop, and
single stranded target specific region, is present in a reaction mixture along with a hot start mRNA primer.
Generally, the length of the stem of the hot start primer can vary according to the context of the application. For example, when the target-specific region of the hot start primer is G:C rich, the length of the stem region can be shorter.
Conversely, when the target-specific region of the hot start primer is A:T rich, the length of the stem region can be longer. Such procedures can be employed to adjust the length of the stem to correspond with a desired Tm, given a particular reaction context at hand. In some embodiments, the length of the stem is between 6-12 nucleotide base pairs.
Generally, the length of the loop of the hot-start primer will be between 8-24 nucleotides in length. Generally, short loops can have the beneficial effect of minimizing the likelihood of loop sequence displacing self-complementary stem duplex sequence at lower reaction temperatures. It will be appreciated by one of ordinary skill in the art that a variety of stem-loop configurations are available and within routine experimentation.
Illustrative molecular biology techniques of ready availability to one of skill in the art can be found in Sambrook et al., Molecular Cloning, 3rd Edition.
CERTAIN EXEMPLARY KITS
The instant teachings also provide kits designed to expedite performing certain of the disclosed methods. Kits may serve to expedite the performance of certain disclosed methods by assembling two or more components required for carrying out the methods. In certain embodiments, kits contain components in pre-
measured unit amounts to minimize the need for measurements by end-users. In some embodiments, kits include instructions for performing one or more of the disclosed methods. Preferably, the kit components are optimized to operate in conjunction with one another.
Thus, in some embodiments the present teachings provide a kit for forming a messenger RNA (mRNA) primer extension product and a micro RNA (miRNA) primer extension product in the same reaction mixture comprising; a hot start mRNA primer, a micro RNA primer, and optionally a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self-complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region, wherein the self-complementary stem is non- denatured at a low temperature, wherein the low temperature is less than 27C, and wherein the self-complementary stem is denatured at a high temperature, wherein the high temperature is between 35C-60C. In some embodiments, the micro RNA primer comprises a self-complementary stem, a loop, and a single-stranded target specific region, wherein the self-complementary stem is non-denatured at the low temperature.
Although the disclosed teachings have been described with reference to various applications, methods, and kits, it will be appreciated that various changes and modifications may be made without departing from the teachings herein. The foregoing examples are provided to better illustrate the present teachings and are not intended to limit the scope of the teachings herein. Certain aspects of the present teachings may be further understood in light of the following claims.
Claims
1. A method of forming a messenger RNA (mRNA) primer extension product and a micro RNA primer extension product in the same reaction mixture comprising;
forming a reverse transcription reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self- complementary stem, and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region;
hybridizing the micro RNA primer to the target micro RNA at a low temperature;
extending the micro RNA primer at the low temperature to form a micro RNA extension product, wherein the self-complementary stem of the hot start mRNA primer is non-denatured;
raising the temperature to a high temperature, wherein the self-complementary stem of the hot start mRNA primer is denatured;
hybridizing the target specific region of the hot start mRNA primer to the target mRNA at the high temperature;
extending the hot start mRNA primer to form a mRNA extension product; and,
forming the mRNA primer extension product and the micro RNA primer extension product in the same reaction mixture.
2. The method according to claim 1 wherein the micro RNA primer comprises a self-complementary stem, a loop, and a single-stranded target specific region, wherein the self-complementary stem is substantially non-denatured at both the low temperature and the high temperature.
3. The method according to claim 2 wherein the self-complementary stem of the micro RNA primer is 6-12 nucleotide base-pairs in length and the single stranded target specific region is 6-8 nucleotides in length.
4. The method according to claim 1 wherein the low temperature is 18C-
27C.
5. The method according to claim 1 wherein the high temperature is 35C-
6OC.
6. The method according to claim 1 wherein blunt-ended self- complementary stem comprises between 6-12 nucleotide base-pairs in length.
7. A method of forming a first primer extension product and a second primer extension product in the same reaction mixture comprising;
forming a primer extension reaction mixture comprising a first primer, a hot start second primer, a first target, a second target, and a primer extending enzyme, wherein the hot start second primer comprises a blunt-ended self- complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region;
hybridizing the first primer to the first target at a low temperature; extending the first primer at the low temperature to form a first primer extension product, wherein the self-complementary stem of the hot start second primer is non-denatured;
raising the temperature to a high temperature, wherein the self- complementary stem of the hot start second primer is denatured;
hybridizing the target specific region of the hot start second primer to the second target at the high temperature;
extending the hot start second primer at the high temperature to form a second target extension product; and,
forming the first primer extension product and the second primer extension product in the same reaction mixture.
8. A reaction mixture comprising a hot start mRNA primer, a micro RNA primer, a target mRNA, a target micro RNA, and a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt-ended self- complementary stem and a loop, wherein the blunt-ended self-complementary stem comprises a target specific region and a quencher region, wherein the self- complementary stem of the hot start mRNA primer is non-denatured at a low temperature, and wherein the self-complementary stem of the hot start mRNA primer is denatured at a high temperature.
9. The reaction mixture according to claim 8 wherein the micro RNA primer comprises a self-complementary stem, a loop, and a single-stranded target specific region, wherein the self-complementary stem is substantially non- denatured at the low temperature.
10. The reaction mixture according to claim 9 wherein the self- complementary stem of the micro RNA primer is 6-12 nucleotide base-pairs in length and the single-stranded target specific region is 6-8 nucleotides in length.
11. The reaction mixture according to claim 8 wherein the low temperature is 18C-27C.
12. The method according to claim 8 wherein the high temperature is 35C-
6OC.
13. The method according to claim 8 wherein blunt-ended self- complementary stem comprises between 6 and 12 nucleotide base pairs in length.
14. A kit for forming a messenger RNA (mRNA) primer extension product and a micro RNA (miRNA) primer extension product in the same reaction mixture comprising;
a hot start mRNA primer, a micro RNA primer, and optionally a reverse transcribing enzyme, wherein the hot start mRNA primer comprises a blunt- ended self-complementary stem and a loop, wherein the blunt-ended self- complementary stem comprises a target specific region and a quencher region, wherein the self-complementary stem is non-denatured at a low temperature, wherein the low temperature is less than 27C, and wherein the self-complementary stem is denatured at a high temperature, wherein the high temperature is between 35C-60C.
15. The kit according to claim 14 wherein the micro RNA primer comprises a self-complementary stem, a loop, and a single-stranded target specific region, wherein the self-complementary stem is non-denatured at the low temperature.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT06787639T ATE489473T1 (en) | 2005-07-15 | 2006-07-17 | ANALYSIS OF MESSENGER RNA AND MICRO-RNA IN THE SAME REACTION APPROACH |
| DE602006018472T DE602006018472D1 (en) | 2005-07-15 | 2006-07-17 | ANALYSIS OF BOTEN RNA AND MICRO RNA IN THE SAME REACTION APPROACH |
| EP06787639A EP1910549B1 (en) | 2005-07-15 | 2006-07-17 | Analyzing messenger rna and micro rna in the same reaction mixture |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69993005P | 2005-07-15 | 2005-07-15 | |
| US60/699,930 | 2005-07-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007011903A2 true WO2007011903A2 (en) | 2007-01-25 |
| WO2007011903A3 WO2007011903A3 (en) | 2007-07-12 |
Family
ID=37669486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2006/027757 WO2007011903A2 (en) | 2005-07-15 | 2006-07-17 | Analyzing messenger rna and micro rna in the same reaction mixture |
Country Status (5)
| Country | Link |
|---|---|
| US (4) | US7745122B2 (en) |
| EP (2) | EP2308990B1 (en) |
| AT (1) | ATE489473T1 (en) |
| DE (1) | DE602006018472D1 (en) |
| WO (1) | WO2007011903A2 (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010083464A2 (en) | 2009-01-16 | 2010-07-22 | Cepheid | Methods of detecting cervical cancer |
| WO2010088668A2 (en) | 2009-02-02 | 2010-08-05 | Cepheid | Methods of detecting sepsis |
| EP2628803A2 (en) | 2009-02-25 | 2013-08-21 | Cepheid | Methods of detecting lung cancer |
| WO2014159073A1 (en) | 2013-03-14 | 2014-10-02 | Cepheid | Methods of detecting lung cancer |
| WO2014164480A1 (en) | 2013-03-12 | 2014-10-09 | Cepheid | Methods of detecting cancer |
| JP2021510541A (en) * | 2018-01-12 | 2021-04-30 | ナテラ， インコーポレイテッド | New primers and their use |
| US11111543B2 (en) | 2005-07-29 | 2021-09-07 | Natera, Inc. | System and method for cleaning noisy genetic data and determining chromosome copy number |
| US11111545B2 (en) | 2010-05-18 | 2021-09-07 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11111544B2 (en) | 2005-07-29 | 2021-09-07 | Natera, Inc. | System and method for cleaning noisy genetic data and determining chromosome copy number |
| US11286530B2 (en) | 2010-05-18 | 2022-03-29 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11306359B2 (en) | 2005-11-26 | 2022-04-19 | Natera, Inc. | System and method for cleaning noisy genetic data from target individuals using genetic data from genetically related individuals |
| US11306357B2 (en) | 2010-05-18 | 2022-04-19 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11322224B2 (en) | 2010-05-18 | 2022-05-03 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11319596B2 (en) | 2014-04-21 | 2022-05-03 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11326208B2 (en) | 2010-05-18 | 2022-05-10 | Natera, Inc. | Methods for nested PCR amplification of cell-free DNA |
| US11332793B2 (en) | 2010-05-18 | 2022-05-17 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11332785B2 (en) | 2010-05-18 | 2022-05-17 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11339429B2 (en) | 2010-05-18 | 2022-05-24 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11390916B2 (en) | 2014-04-21 | 2022-07-19 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11408031B2 (en) | 2010-05-18 | 2022-08-09 | Natera, Inc. | Methods for non-invasive prenatal paternity testing |
| US11479812B2 (en) | 2015-05-11 | 2022-10-25 | Natera, Inc. | Methods and compositions for determining ploidy |
| US11485996B2 (en) | 2016-10-04 | 2022-11-01 | Natera, Inc. | Methods for characterizing copy number variation using proximity-litigation sequencing |
| US11519028B2 (en) | 2016-12-07 | 2022-12-06 | Natera, Inc. | Compositions and methods for identifying nucleic acid molecules |
| US11525159B2 (en) | 2018-07-03 | 2022-12-13 | Natera, Inc. | Methods for detection of donor-derived cell-free DNA |
| US11939634B2 (en) | 2010-05-18 | 2024-03-26 | Natera, Inc. | Methods for simultaneous amplification of target loci |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2405024A1 (en) * | 2005-07-15 | 2012-01-11 | Life Technologies Corporation | Hot start reverse transcription by primer design |
| EP2308990B1 (en) * | 2005-07-15 | 2012-09-26 | Life Technologies Corporation | Analyzing messenger RNA and micro RNA in the same reaction mixture |
| US8039234B1 (en) * | 2006-05-22 | 2011-10-18 | Applied Biosystems, Llc | Methods, panels of identification markers, and kits for identifying forensic samples |
| AU2011358564B9 (en) | 2011-02-09 | 2017-07-13 | Natera, Inc | Methods for non-invasive prenatal ploidy calling |
| WO2014093714A1 (en) | 2012-12-14 | 2014-06-19 | Bio-Rad Laboratories, Inc. | Methods and compositions for using oils for analysis and detection of molecules |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338671A (en) | 1992-10-07 | 1994-08-16 | Eastman Kodak Company | DNA amplification with thermostable DNA polymerase and polymerase inhibiting antibody |
| US5411876A (en) | 1990-02-16 | 1995-05-02 | Hoffmann-La Roche Inc. | Use of grease or wax in the polymerase chain reaction |
| US5677152A (en) | 1995-08-25 | 1997-10-14 | Roche Molecular Systems, Inc. | Nucleic acid amplification using a reersibly inactivated thermostable enzyme |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5234809A (en) | 1989-03-23 | 1993-08-10 | Akzo N.V. | Process for isolating nucleic acid |
| AU4966997A (en) | 1996-11-18 | 1998-06-10 | Takeshi Imanishi | Novel nucleotide analogues |
| JP3756313B2 (en) | 1997-03-07 | 2006-03-15 | 武 今西 | Novel bicyclonucleosides and oligonucleotide analogues |
| EP1557424A1 (en) | 1997-09-12 | 2005-07-27 | Exiqon A/S | Bi-cyclic nucleoside, nucleotide and oligonucleoide analogues |
| TNSN99233A1 (en) | 1998-12-19 | 2001-12-31 | Exxon Production Research Co | HIGH STRENGTH STEELS WITH EXCELLENT CRYOGENIC TEMPERATURE TENACITY |
| US6605451B1 (en) * | 2000-06-06 | 2003-08-12 | Xtrana, Inc. | Methods and devices for multiplexing amplification reactions |
| US20030165859A1 (en) * | 2001-10-23 | 2003-09-04 | Invitrogen Corporation | Primers and methods for the detection and discrimination of nucleic acids |
| JP2006508662A (en) | 2002-12-04 | 2006-03-16 | アプレラ コーポレイション | Multiplex amplification of polynucleotides |
| WO2005094532A2 (en) * | 2004-03-24 | 2005-10-13 | Applera Corporation | Encoding and decoding reactions for determining target polynucleotides |
| US8192937B2 (en) * | 2004-04-07 | 2012-06-05 | Exiqon A/S | Methods for quantification of microRNAs and small interfering RNAs |
| US7575863B2 (en) * | 2004-05-28 | 2009-08-18 | Applied Biosystems, Llc | Methods, compositions, and kits comprising linker probes for quantifying polynucleotides |
| WO2006020090A2 (en) * | 2004-07-19 | 2006-02-23 | Smith & Nephew, Inc. | Pulsed current sintering for surfaces of medical implants |
| US20060057595A1 (en) * | 2004-09-16 | 2006-03-16 | Applera Corporation | Compositions, methods, and kits for identifying and quantitating small RNA molecules |
| US20070015176A1 (en) * | 2005-02-18 | 2007-01-18 | Applera Corporation | Small nucleic acid detection probes and uses thereof |
| US20060223066A1 (en) * | 2005-03-29 | 2006-10-05 | Applera Corporation | Methods for normalizing and for identifying small nucleic acids |
| JP4879975B2 (en) * | 2005-05-31 | 2012-02-22 | アプライド バイオシステムズ リミテッド ライアビリティー カンパニー | Multiplex amplification of short nucleic acids |
| WO2006130761A1 (en) * | 2005-05-31 | 2006-12-07 | Applera Corporation | Linear amplification of short nucleic acids |
| US20070048757A1 (en) * | 2005-05-31 | 2007-03-01 | Applera Corporation | Methods for characterizing cells using amplified micro rnas |
| EP2405024A1 (en) * | 2005-07-15 | 2012-01-11 | Life Technologies Corporation | Hot start reverse transcription by primer design |
| EP2308990B1 (en) | 2005-07-15 | 2012-09-26 | Life Technologies Corporation | Analyzing messenger RNA and micro RNA in the same reaction mixture |
| AU2006270063A1 (en) * | 2005-07-15 | 2007-01-25 | Applied Biosystems, Llc. | Methods for RNA profiling |
| EP1924708A4 (en) * | 2005-09-12 | 2010-03-10 | Applera Corp | Pure mirna sample preparation method |
| FR2989691B1 (en) | 2012-04-24 | 2014-05-23 | Commissariat Energie Atomique | REACTOR FOR ATOMIC LAYER DEPOSITION (ALD), APPLICATION TO ENCAPSULATING AN OLED DEVICE BY TRANSPARENT AL2O3 LAYER DEPOSITION. |
| JP6102810B2 (en) | 2014-03-25 | 2017-03-29 | 富士ゼロックス株式会社 | Charging member, charging device, process cartridge, image forming apparatus, and method of manufacturing charging member |
-
2006
- 2006-07-17 EP EP10191745A patent/EP2308990B1/en not_active Not-in-force
- 2006-07-17 WO PCT/US2006/027757 patent/WO2007011903A2/en active Application Filing
- 2006-07-17 EP EP06787639A patent/EP1910549B1/en not_active Not-in-force
- 2006-07-17 DE DE602006018472T patent/DE602006018472D1/en active Active
- 2006-07-17 US US11/458,089 patent/US7745122B2/en active Active
- 2006-07-17 AT AT06787639T patent/ATE489473T1/en not_active IP Right Cessation
-
2010
- 2010-05-17 US US12/781,690 patent/US8487085B2/en active Active
-
2013
- 2013-07-15 US US13/942,437 patent/US8962254B2/en not_active Expired - Fee Related
-
2015
- 2015-02-20 US US14/627,741 patent/US9422603B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411876A (en) | 1990-02-16 | 1995-05-02 | Hoffmann-La Roche Inc. | Use of grease or wax in the polymerase chain reaction |
| US5338671A (en) | 1992-10-07 | 1994-08-16 | Eastman Kodak Company | DNA amplification with thermostable DNA polymerase and polymerase inhibiting antibody |
| US5677152A (en) | 1995-08-25 | 1997-10-14 | Roche Molecular Systems, Inc. | Nucleic acid amplification using a reersibly inactivated thermostable enzyme |
| US5773258A (en) | 1995-08-25 | 1998-06-30 | Roche Molecular Systems, Inc. | Nucleic acid amplification using a reversibly inactivated thermostable enzyme |
Cited By (41)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11111543B2 (en) | 2005-07-29 | 2021-09-07 | Natera, Inc. | System and method for cleaning noisy genetic data and determining chromosome copy number |
| US11111544B2 (en) | 2005-07-29 | 2021-09-07 | Natera, Inc. | System and method for cleaning noisy genetic data and determining chromosome copy number |
| US11306359B2 (en) | 2005-11-26 | 2022-04-19 | Natera, Inc. | System and method for cleaning noisy genetic data from target individuals using genetic data from genetically related individuals |
| EP2641976A2 (en) | 2009-01-16 | 2013-09-25 | Cepheid | Methods of detecting cervical cancer |
| WO2010083464A2 (en) | 2009-01-16 | 2010-07-22 | Cepheid | Methods of detecting cervical cancer |
| WO2010088668A2 (en) | 2009-02-02 | 2010-08-05 | Cepheid | Methods of detecting sepsis |
| EP2628803A2 (en) | 2009-02-25 | 2013-08-21 | Cepheid | Methods of detecting lung cancer |
| US11339429B2 (en) | 2010-05-18 | 2022-05-24 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11525162B2 (en) | 2010-05-18 | 2022-12-13 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11939634B2 (en) | 2010-05-18 | 2024-03-26 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11286530B2 (en) | 2010-05-18 | 2022-03-29 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11746376B2 (en) | 2010-05-18 | 2023-09-05 | Natera, Inc. | Methods for amplification of cell-free DNA using ligated adaptors and universal and inner target-specific primers for multiplexed nested PCR |
| US11306357B2 (en) | 2010-05-18 | 2022-04-19 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11312996B2 (en) | 2010-05-18 | 2022-04-26 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11322224B2 (en) | 2010-05-18 | 2022-05-03 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11111545B2 (en) | 2010-05-18 | 2021-09-07 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11519035B2 (en) | 2010-05-18 | 2022-12-06 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11326208B2 (en) | 2010-05-18 | 2022-05-10 | Natera, Inc. | Methods for nested PCR amplification of cell-free DNA |
| US11332793B2 (en) | 2010-05-18 | 2022-05-17 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11332785B2 (en) | 2010-05-18 | 2022-05-17 | Natera, Inc. | Methods for non-invasive prenatal ploidy calling |
| US11482300B2 (en) | 2010-05-18 | 2022-10-25 | Natera, Inc. | Methods for preparing a DNA fraction from a biological sample for analyzing genotypes of cell-free DNA |
| US11408031B2 (en) | 2010-05-18 | 2022-08-09 | Natera, Inc. | Methods for non-invasive prenatal paternity testing |
| WO2014164480A1 (en) | 2013-03-12 | 2014-10-09 | Cepheid | Methods of detecting cancer |
| WO2014159073A1 (en) | 2013-03-14 | 2014-10-02 | Cepheid | Methods of detecting lung cancer |
| US11319596B2 (en) | 2014-04-21 | 2022-05-03 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11408037B2 (en) | 2014-04-21 | 2022-08-09 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11371100B2 (en) | 2014-04-21 | 2022-06-28 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11414709B2 (en) | 2014-04-21 | 2022-08-16 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11390916B2 (en) | 2014-04-21 | 2022-07-19 | Natera, Inc. | Methods for simultaneous amplification of target loci |
| US11486008B2 (en) | 2014-04-21 | 2022-11-01 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11530454B2 (en) | 2014-04-21 | 2022-12-20 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11319595B2 (en) | 2014-04-21 | 2022-05-03 | Natera, Inc. | Detecting mutations and ploidy in chromosomal segments |
| US11479812B2 (en) | 2015-05-11 | 2022-10-25 | Natera, Inc. | Methods and compositions for determining ploidy |
| US11946101B2 (en) | 2015-05-11 | 2024-04-02 | Natera, Inc. | Methods and compositions for determining ploidy |
| US11485996B2 (en) | 2016-10-04 | 2022-11-01 | Natera, Inc. | Methods for characterizing copy number variation using proximity-litigation sequencing |
| US11519028B2 (en) | 2016-12-07 | 2022-12-06 | Natera, Inc. | Compositions and methods for identifying nucleic acid molecules |
| US11530442B2 (en) | 2016-12-07 | 2022-12-20 | Natera, Inc. | Compositions and methods for identifying nucleic acid molecules |
| EP3737773B1 (en) * | 2018-01-12 | 2023-04-12 | Natera, Inc. | Novel primers and uses thereof |
| JP7322063B2 (en) | 2018-01-12 | 2023-08-07 | ナテラ， インコーポレイテッド | Novel primers and uses thereof |
| JP2021510541A (en) * | 2018-01-12 | 2021-04-30 | ナテラ， インコーポレイテッド | New primers and their use |
| US11525159B2 (en) | 2018-07-03 | 2022-12-13 | Natera, Inc. | Methods for detection of donor-derived cell-free DNA |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140065624A1 (en) | 2014-03-06 |
| EP1910549A2 (en) | 2008-04-16 |
| WO2007011903A3 (en) | 2007-07-12 |
| EP2308990A1 (en) | 2011-04-13 |
| EP2308990B1 (en) | 2012-09-26 |
| EP1910549A4 (en) | 2009-03-25 |
| DE602006018472D1 (en) | 2011-01-05 |
| US8487085B2 (en) | 2013-07-16 |
| EP1910549B1 (en) | 2010-11-24 |
| US20070128621A1 (en) | 2007-06-07 |
| US9422603B2 (en) | 2016-08-23 |
| US8962254B2 (en) | 2015-02-24 |
| US20150232918A1 (en) | 2015-08-20 |
| US20100221790A1 (en) | 2010-09-02 |
| US7745122B2 (en) | 2010-06-29 |
| ATE489473T1 (en) | 2010-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2308990B1 (en) | Analyzing messenger RNA and micro RNA in the same reaction mixture | |
| US9567635B2 (en) | Hot start reverse transcription by primer design | |
| EP3268491B1 (en) | Methods, compositions and kits for small rna capture, detection and quantification | |
| CA2734514C (en) | Self-avoiding molecular recognition systems in dna amplification | |
| EP2151506B1 (en) | Method of amplifying target nucleic acid sequence by multiple displacement amplification including thermal cycling | |
| WO2010026933A1 (en) | Composition for detection of rna | |
| US20230126241A1 (en) | Methods and compositions for multistage primer extension reactions | |
| US20110159548A1 (en) | Method for amplifying monomorphic-tailed nucleic acids | |
| US9394557B2 (en) | Linear amplification of short nucleic acids | |
| WO2016156071A1 (en) | Methods to amplify highly uniform and less error prone nucleic acid libraries | |
| WO2017183648A1 (en) | Multi-item amplification method | |
| KR102034721B1 (en) | Method for determining a ratio of RNA type in a sample | |
| WO2023192927A2 (en) | Tertiary cooperative primers and methods of use | |
| JP2008178338A (en) | Nucleic acid amplification method in which target nucleic acid in nucleic acid sample mixed with fragmented nucleic acid is amplified, and kit therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 2006787639 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |