Taqman® Gene Expression Assays Protocol for Research Use Only
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SARS-Cov-2 RNA, Qualitative Real-Time RT-PCR (Test Code 39433)
SARS-CoV-2 RNA, Qualitative Real-Time RT-PCR (Test Code 39433) Package Insert For Emergency Use Only For In-vitro Diagnostic Use - Rx Only Intended Use The Quest Diagnostics SARS-CoV-2 RNA, Qualitative Real-Time RT-PCR (“Quest SARS-CoV-2 rRT-PCR”) is a real-time RT-PCR test intended for the qualitative detection of nucleic acid from the SARS-CoV-2 in upper and lower respiratory specimens (such as nasopharyngeal or oropharyngeal swabs, sputum, tracheal aspirates, and bronchoalveolar lavage) collected from individuals suspected of COVID-19 by their healthcare provider. This test is also for use with nasal swab specimens that are self-collected at home or in a healthcare setting by individuals using an authorized home-collection kit when determined to be appropriate by a healthcare provider. This test is for the qualitative detection of nucleic acid from the SARS-CoV-2 in pooled samples containing up to four of the individual upper respiratory swab specimens (nasopharyngeal, mid-turbinate, anterior nares or oropharyngeal swabs) that were collected in individual vials containing transport media from individuals suspected of COVID-19 by their healthcare provider. Negative results from pooled testing should not be treated as definitive. If patient’s clinical signs and symptoms are inconsistent with a negative result or results are necessary for patient management, then the patient should be considered for individual testing. Specimens included in pools with a positive, inconclusive, or invalid result must be tested individually prior to reporting a result. Specimens with low viral loads may not be detected in sample pools due to the decreased sensitivity of pooled testing. -
Optimizing Primerá/Probe Design for Fluorescent
Journal of Neuroscience Methods 123 (2003) 31Á/45 www.elsevier.com/locate/jneumeth Optimizing primerÁ/probe design for fluorescent PCR Dmitri Proudnikov *, Vadim Yuferov, Yan Zhou, K.Steven LaForge, Ann Ho, Mary Jeanne Kreek Laboratory of the Biology of Addictive Diseases, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA Received 30 July 2002; received in revised form 21 October 2002; accepted 25 October 2002 Abstract TaqMan†,avariation of fluorescent PCR, is a powerful tool for gene expression and polymorphism studies. Here we describe the design and evaluation of 27 new TaqMan† primer-probe sets for rat genes that play a key role in neural signaling. These newly designed and synthesized probes were tested and then used for quantification of RNA isolated from rat brain. The usual length of † common TaqMan probes is 25 bases or less. In these studies we constructed probes with lengths of 25Á/39 bases to span exonÁ/exon junctions of nucleic acids to avoid the influence of DNA contamination upon the RNA quantification. The specific sequences at these positions required probes of these lengths to optimize hybridization. We found that the relocation of the quencher from the traditional 3? position to an internal one increases the sensitivity of probe up to 30 fold. Substitution of 6-carboxyfluorescein with Alexa Fluor† 488 as fluorophore and TAMRA with non-fluorescent quencher dabcyl was also investigated. We also describe the evaluation of part of a newly designed set of 27 TaqMan† primer-probes for the measurement of differences in gene expression levels in samples from the caudate putamen region of rat brain after ‘binge’ paradigm cocaine administration. -
WO 2019/079361 Al 25 April 2019 (25.04.2019) W 1P O PCT
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization I International Bureau (10) International Publication Number (43) International Publication Date WO 2019/079361 Al 25 April 2019 (25.04.2019) W 1P O PCT (51) International Patent Classification: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, C12Q 1/68 (2018.01) A61P 31/18 (2006.01) DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, C12Q 1/70 (2006.01) HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (21) International Application Number: MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, PCT/US2018/056167 OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (22) International Filing Date: SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 16 October 2018 (16. 10.2018) TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (25) Filing Language: English (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (26) Publication Language: English GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, (30) Priority Data: UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 62/573,025 16 October 2017 (16. 10.2017) US TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, ΓΕ , IS, IT, LT, LU, LV, (71) Applicant: MASSACHUSETTS INSTITUTE OF MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TECHNOLOGY [US/US]; 77 Massachusetts Avenue, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, Cambridge, Massachusetts 02139 (US). -
De Novo Mutations in EIF2B1 Affecting Eif2 Signaling Cause Neonatal/Early-Onset Diabetes and Transient Hepatic Dysfunction
Diabetes Volume 69, March 2020 477 De Novo Mutations in EIF2B1 Affecting eIF2 Signaling Cause Neonatal/Early-Onset Diabetes and Transient Hepatic Dysfunction Elisa De Franco,1 Richard Caswell,1 Matthew B. Johnson,1 Matthew N. Wakeling,1 Amnon Zung,2 Vu~ Chí Dung,~ 3 C^an Thi Bích Ngoc,3 Rajiv Goonetilleke,4 Maritza Vivanco Jury,5 Mohammed El-Khateeb,6 _ _ Sian Ellard,1 Sarah E. Flanagan,1 David Ron,7 and Andrew T. Hattersley1 Diabetes 2020;69:477–483 | https://doi.org/10.2337/db19-1029 GENETICS/GENOMES/PROTEOMICS/METABOLOMICS Permanent neonatal diabetes mellitus (PNDM) is caused the age of 6 months. A genetic cause is identified in 82% by reduced b-cell number or impaired b-cell function. of cases, resulting in improved treatment in almost Understanding of the genetic basis of this disorder high- 40% (1). lights fundamental b-cell mechanisms. We performed Thirty-nine percent of patients with PNDM have trio genome sequencing for 44 patients with PNDM a genetic etiology resulting in development of at least and their unaffected parents to identify causative de one extrapancreatic feature, alongside diabetes (1). The novo variants. Replication studies were performed in most common PNDM syndromic subtype is Wolcott- 188 patients diagnosed with diabetes before 2 years of Rallison syndrome, which is caused by autosomal re- age without a genetic diagnosis. EIF2B1 (encoding the cessive mutations in the EIF2AK3 gene. Individuals with a eIF2B complex subunit) was the only gene with novel Wolcott-Rallison syndrome usually develop diabetes in the de novo variants (all missense) in at least three patients. -
Rnase-H-Based Assays Utilizing Modified Rna
(19) TZZ ¥_T (11) EP 2 279 263 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.: of the grant of the patent: C12Q 1/68 (2006.01) 04.09.2013 Bulletin 2013/36 (86) International application number: (21) Application number: 09739895.2 PCT/US2009/042454 (22) Date of filing: 30.04.2009 (87) International publication number: WO 2009/135093 (05.11.2009 Gazette 2009/45) (54) RNASE-H-BASED ASSAYS UTILIZING MODIFIED RNA MONOMERS TESTS AUF RNASE-H-BASIS MIT MODIFIZIERTEN RNA-MONOMEREN DOSAGES À BASE DE RNASE-H UTILISANT DES MONOMÈRES D’ARN MODIFIÉS (84) Designated Contracting States: • ROSE, Scott AT BE BG CH CY CZ DE DK EE ES FI FR GB GR Coralville, IA 52241 (US) HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL • DOBOSY, Joseph PT RO SE SI SK TR Coralville, IA 52241 (US) (30) Priority: 30.04.2008 US 49204 P (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser (43) Date of publication of application: Leopoldstrasse 4 02.02.2011 Bulletin 2011/05 80802 München (DE) (60) Divisional application: (56) References cited: 13173388.3 EP-A- 1 367 136 WO-A-01/21813 13173389.1 WO-A-03/074724 WO-A-2004/059012 13173390.9 WO-A-2007/062495 WO-A2-2005/021776 13173391.7 WO-A2-2007/141580 US-A- 5 744 308 US-A- 5 830 664 (73) Proprietor: Integrated Dna Technologies, Inc. Coralville, IA 52241 (US) • ITAYA M ET AL: "Molecular cloning of a ribonuclease H (RNase HI) gene from an extreme (72) Inventors: thermophile Thermus thermophilus HB8: a • WALDER, Joseph, Alan thermostable RNase H can functionally replace Chicago, IL 60645 (US) the Escherichia coli enzyme in vivo." NUCLEIC • BEHLKE, Mark, Aaron ACIDS RESEARCH 25 AUG 1991, vol. -
Essentials of Real Time PCR About Sequence Detection Chemistries
Essentials of Real Time PCR About Real-Time PCR Assays Real-time Polymerase Chain Reaction (PCR) is the ability to monitor the progress of the PCR as it occurs ( i.e., in real time). Data is therefore collected throughout the PCR process, rather than at the end of the PCR. This completely revolutionizes the way one approaches PCR-based quantitation of DNA and RNA. In real-time PCR, reactions are characterized by the point in time during cycling when amplification of a target is first detected rather than the amount of target accumulated after a fixed number of cycles. The higher the starting copy number of the nucleic acid target, the sooner a significant increase in fluorescence is observed. In contrast, an endpoint assay (also called a “plate read assay”) measures the amount of accumulated PCR product at the end of the PCR cycle. About Sequence Detection Chemistries Overview Applied Biosystems has developed two types of chemistries used to detect PCR products using Sequence Detection Systems (SDS) instruments: ® • TaqMan chemistry (also known as “fluorogenic 5´ nuclease chemistry”) ® • SYBR Green I dye chemistry TaqMan® Chemistry The TaqMan chemistry uses a fluorogenic probe to enable the detection of a specific PCR product as it accumulates during PCR cycles. Assay Types that Use TaqMan Chemistry The TaqMan chemistry can be used for the following assay types: • Quantitation, including: – One-step RT-PCR for RNA quantitation – Two-step RT-PCR for RNA quantitation – DNA/cDNA quantitation • Allelic Discrimination • Plus/Minus using an IPC SYBR Green I Dye Chemistry The SYBR Green I dye chemistry uses SYBR Green I dye, a highly specific, double-stranded DNA binding dye, to detect PCR product as it accumulates during PCR cycles. -
1 1 2 Pharmacological Dimerization and Activation of the Exchange
1 2 3 Pharmacological dimerization and activation of the exchange factor eIF2B antagonizes the 4 integrated stress response 5 6 7 *Carmela Sidrauski1,2, *Jordan C. Tsai1,2, Martin Kampmann2,3, Brian R. Hearn4, Punitha 8 Vedantham4, Priyadarshini Jaishankar4 , Masaaki Sokabe5, Aaron S. Mendez1,2, Billy W. 9 Newton6, Edward L. Tang6.7, Erik Verschueren6, Jeffrey R. Johnson6,7, Nevan J. Krogan6,7,, 10 Christopher S. Fraser5, Jonathan S. Weissman2,3, Adam R. Renslo4, and Peter Walter 1,2 11 12 1Department of Biochemistry and Biophysics, University of California, San Francisco, United 13 States 14 2Howard Hughes Medical Institute, University of California, San Francisco, United States 15 3Department of Cellular and Molecular Pharmacology, University of California, San Francisco, 16 United States 17 4Department of Pharmaceutical Chemistry and the Small Molecule Discovery Center, University 18 of California at San Francisco, United States 19 5Department of Molecular and Cellular Biology, College of Biological Sciences, University of 20 California, Davis, United States 21 6QB3, California Institute for Quantitative Biosciences, University of California, San Francisco, 22 United States 23 7Gladstone Institutes, San Francisco, United States 24 25 * Both authors contributed equally to this work 26 27 28 Abstract 29 30 The general translation initiation factor eIF2 is a major translational control point. Multiple 31 signaling pathways in the integrated stress response phosphorylate eIF2 serine-51, inhibiting 32 nucleotide exchange by eIF2B. ISRIB, a potent drug-like small molecule, renders cells 33 insensitive to eIF2α phosphorylation and enhances cognitive function in rodents by blocking 34 long-term depression. ISRIB was identified in a phenotypic cell-based screen, and its mechanism 35 of action remained unknown. -
Relevance of Translation Initiation in Diffuse Glioma Biology and Its
cells Review Relevance of Translation Initiation in Diffuse Glioma Biology and its Therapeutic Potential Digregorio Marina 1, Lombard Arnaud 1,2, Lumapat Paul Noel 1, Scholtes Felix 1,2, Rogister Bernard 1,3 and Coppieters Natacha 1,* 1 Laboratory of Nervous System Disorders and Therapy, GIGA-Neurosciences Research Centre, University of Liège, 4000 Liège, Belgium; [email protected] (D.M.); [email protected] (L.A.); [email protected] (L.P.N.); [email protected] (S.F.); [email protected] (R.B.) 2 Department of Neurosurgery, CHU of Liège, 4000 Liège, Belgium 3 Department of Neurology, CHU of Liège, 4000 Liège, Belgium * Correspondence: [email protected] Received: 18 October 2019; Accepted: 26 November 2019; Published: 29 November 2019 Abstract: Cancer cells are continually exposed to environmental stressors forcing them to adapt their protein production to survive. The translational machinery can be recruited by malignant cells to synthesize proteins required to promote their survival, even in times of high physiological and pathological stress. This phenomenon has been described in several cancers including in gliomas. Abnormal regulation of translation has encouraged the development of new therapeutics targeting the protein synthesis pathway. This approach could be meaningful for glioma given the fact that the median survival following diagnosis of the highest grade of glioma remains short despite current therapy. The identification of new targets for the development of novel therapeutics is therefore needed in order to improve this devastating overall survival rate. This review discusses current literature on translation in gliomas with a focus on the initiation step covering both the cap-dependent and cap-independent modes of initiation. -
Loop-Mediated Isothermal Amplification (LAMP)
cells Review Loop-Mediated Isothermal Amplification (LAMP): The Better Sibling of PCR? Marianna Soroka, Barbara Wasowicz * and Anna Rymaszewska Department of Genetics and Genomics, Institute of Biology, University of Szczecin, 3c Felczaka St., 71-412 Szczecin, Poland; [email protected] (M.S.); [email protected] (A.R.) * Correspondence: [email protected] Abstract: In 1998, when the PCR technique was already popular, a Japanese company called Eiken Chemical Co., Ltd. designed a method known as the loop-mediated isothermal amplification of DNA (LAMP). The method can produce up to 109 copies of the amplified DNA within less than an hour. It is also highly specific due to the use of two to three pairs of primers (internal, external, and loop), which recognise up to eight specific locations on the DNA or RNA targets. Furthermore, the Bst DNA polymerase most used in LAMP shows a high strand displacement activity, which eliminates the DNA denaturation stage. One of the most significant advantages of LAMP is that it can be conducted at a stable temperature, for instance, in a dry block heater or an incubator. The products of LAMP can be detected much faster than in standard techniques, sometimes only requiring analysis with the naked eye. The following overview highlights the usefulness of LAMP and its effectiveness in various fields; it also considers the superiority of LAMP over PCR and presents RT-LAMP as a rapid diagnostic tool for SARS-CoV-2. Keywords: LAMP method; isothermal amplification; SARS-CoV-2 detection Citation: Soroka, M.; Wasowicz, B.; Rymaszewska, A. -
High-Surety Isothermal Amplification and Detection of SARS-Cov-2, Including with Crude Enzymes
bioRxiv preprint doi: https://doi.org/10.1101/2020.04.13.039941; this version posted May 7, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. High-surety isothermal amplification and detection of SARS-CoV-2, including with crude enzymes Sanchita Bhadra1,2, Timothy E. Riedel3, Simren Lakhotia3, Nicholas D. Tran3, and Andrew D. Ellington1,2 1 Department of Molecular Biosciences, College of Natural Sciences, The University of Texas at Austin, Austin, TX 78712, USA. 2 Center for Systems and Synthetic Biology, The University of Texas at Austin, Austin, TX 78712, USA. 3 Freshman Research Initiative, DIY Diagnostics Stream, The University of Texas at Austin, Austin, TX 78712, USA ABSTRACT Isothermal nucleic acid amplification tests (iNAT), such as loop-mediated isothermal amplification (LAMP), are good alternatives to polymerase chain reaction (PCR)-based amplification assays, especially for point-of-care and low resource use, in part because they can be carried out with relatively simple instrumentation. However, iNATs can generate spurious amplicons, especially in the absence of target sequences, resulting in false positive results. This is especially true if signals are based on non-sequence-specific probes, such as intercalating dyes or pH changes. In addition, pathogens often prove to be moving, evolving targets, and can accumulate mutations that will lead to inefficient primer binding and thus false negative results. Internally redundant assays targeting different regions of the target sequence can help to reduce such false negatives. -
206584751.Pdf
RESEARCH ARTICLE elifesciences.org Pharmacological dimerization and activation of the exchange factor eIF2B antagonizes the integrated stress response Carmela Sidrauski1,2*†‡, Jordan C Tsai1,2†, Martin Kampmann2,3, Brian R Hearn4,5, Punitha Vedantham4,5, Priyadarshini Jaishankar4,5, Masaaki Sokabe6, Aaron S Mendez2,3, Billy W Newton7, Edward L Tang7,8, Erik Verschueren7, Jeffrey R Johnson7,8, Nevan J Krogan7,8, Christopher S Fraser6, Jonathan S Weissman2,3, Adam R Renslo4,5, Peter Walter1,2* 1Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, United States; 2Howard Hughes Medical Institution, University of California, San Francisco, San Francisco, United States; 3Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, United States; 4Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States; 5Small Molecule Discovery Center, University of California, San Francisco, San Francisco, United States; 6Department of Molecular and Cellular Biology, College of Biological Sciences, University of California, Davis, Davis, United States; 7QB3, California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, United States; 8Gladstone *For correspondence: Institutes, San Francisco, United States [email protected] (CS); peter@ walterlab.ucsf.edu (PW) †These authors contributed equally to this work Abstract The general translation initiation factor eIF2 is a major translational control point. Multiple signaling pathways in the integrated stress response phosphorylate eIF2 serine-51, ‡ Present address: Calico LLC, inhibiting nucleotide exchange by eIF2B. ISRIB, a potent drug-like small molecule, renders cells South San Francisco, United insensitive to eIF2α phosphorylation and enhances cognitive function in rodents by blocking long- States term depression. -
One Enzyme Reverse Transcription Qpcr Using Taq DNA Polymerase Sanchita Bhadra*, Andre C
bioRxiv preprint doi: https://doi.org/10.1101/2020.05.27.120238; this version posted May 30, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. One enzyme reverse transcription qPCR using Taq DNA polymerase Sanchita Bhadra*, Andre C. Maranhao*, and Andrew D. Ellington Department of Molecular Biosciences, College of Natural Sciences, The University of Texas at Austin, Austin, TX 78712, USA. Center for Systems and Synthetic Biology, The University of Texas at Austin, Austin, TX 78712, USA. * Inquiries about manuscript to [email protected]; [email protected] ABSTRACT Taq DNA polymerase, one of the first thermostable DNA polymerases to be discovered, has been typecast as a DNA-dependent DNA polymerase commonly employed for PCR. However, Taq polymerase belongs to the same DNA polymerase superfamily as the Molony murine leukemia virus reverse transcriptase and has in the past been shown to possess reverse transcriptase activity. We report optimized buffer and salt compositions that promote the reverse transcriptase activity of Taq DNA polymerase, and thereby allow it to be used as the sole enzyme in TaqMan RT-qPCR reactions. We demonstrate the utility of Taq-alone RT-qPCR reactions by executing CDC SARS-CoV-2 N1, N2, and N3 TaqMan RT-qPCR assays that could detect as few as 2 copies/µL of input viral genomic RNA. INTRODUCTION RT-qPCR remains the gold standard for the detection of SARS-CoV-2.