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Clin. Can. Res. 14, 3278-3282. Mutant epidermal growth factor receptor in benign, borderline, and malignant ovarian tumors. 2008

Dahl Steffensen, K., Waldstrøm, M., Olsen, D.A., Corydon, T., Lorentzen, K.A., Hans Jørgen Knudsen, H.J., Jeppesen, U., Brandslund, I., and Jakobsen, A.

Notes: These authors evaluated 225 tumor samples from various ovarian and peritoneal tumor types for expression of the epidermal growth factor receptor type III variant EGFRvIII. EGFvIII has not been observed in normal tissues and so was evaluated as a potential target for tumor-specific therapies. However, none of the 225 samples evaluated were positive for this marker, suggesting that the EGFRvIII mutation is rare in ovarian tissue and is not a good therapeutic target for this disease. The authors used the Maxwell 16 Total RNA Purification Kit and the Maxwell 16 Instrument to purify RNA from tissue samples that had been fresh-frozen and fixed in the stabilization reagent RNAlater (Qiagen). Complete details of the RNA purification procedure are provided in the paper. (3878)

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Cancer Res. 68, 4623–4630. Integrative genomics identifies RAB23 as an invasion mediator gene in diffuse-type gastric cancer. 2008

Hou, Q., Wu, Y.H., Grabsch, H., Zhu, Y., Leong, S.H., Ganesan, K., Cross, D., Tan, L.K., Tao, J., Gopalakrishnan, V., Tang, B.L., Kon, O.L. and Tan, P.

Notes: In this article, the researchers explored the role of RAB23 in gastric cancers. Twenty-four hours before transfection, AGS cells (gastric cancer cell line) that expressed RAB23 were seeded into a 24-well plate at a density of 1.8 × 105 cells/ml. To overexpress RAB23, a full-length RAB23 cDNA was cloned into the pCI-neo Mammalian Expression Vector and transfected into AGS cells. The effect of RAB23 overexpression on the cells was determined using a Matrigel invasion assay while protein expression levels were visualized with Western blotting. (3986)

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Malaria Journal Oct 29:7, 223. A general SNP-based molecular barcode for Plasmodium falciparum identification and tracking. 2008

Daniels R, Volkman SK, Milner DA, Mahesh N, Neafsey DE, Park DJ, Rosen D, Angelino E, Sabeti PC, Wirth DF, Wiegand RC.

Notes: These authors used the Maxwell® 16 System to isolate DNA from frozen whole blood samples infected with Plasmodium falciparum. The isolated DNA was used in a qPCR-based SNP genotyping assay that sought to uniquely identify the parasites based on their SNP marker profile. (3962)

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J. Virol. 12, 5940–50. Sulfatide is required for efficient replication of influenza A virus. 2008

Takahashi, T., Murakami, K., Nagakura, M., Kishita, H., Watanabe, S., Honke, K., Ogura, K., Tai, T., Kawasaki, K., Miyamoto, D., Hidari, K.I., Guo, C.T., Suzuki, Y. and Suzuki, T.

Notes: Sulfatide is present in mammalian organs where influenza A replicates. Ceramide galactosyltransferase (CGT) and cerebroside (galactosylceramide) sulfotransferase (CST), which synthesize sulfatide, were cloned by PCR into the pTargeT™ Mammalian Expression Vector and the pGEM®-T Easy Vector, (CST with or without a three base insertion), respectively. The two genes were removed by restriction digestion and cloned into pIRES-neo to forma bicistronic construct. Arylsulfatase A (ASA), which degrades sulfatide was also amplified and cloned into the pGEM®-T Easy Vector, before being subcloned into a neomycin-resistant expression vector. The expression vectors were transfected into COS-7 cells and selected for stable expression using G418. (3990)

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Proc. Natl. Acad. Sci. USA 105, 7141-7146. Lack of aldose 1-epimerase in Hypocrea jecorina (anamorph Trichoderma reesei): A key to cellulase gene expression on lactose 2008

Fekete, E., Seiboth, B., Kubicek, C.P., Szentirmai, A., Karaffa, L.

Notes: To amplify yeast mutarotase, S. cerevisiae was used, and E. coli strain JM109 (Promega Cat.# L2001) was used for plasmid propagation. Fungal mycelia were harvested by filtration, washed, frozen and ground under liquid nitrogen. Genomic DNA was extracted using the Wizard Genomic DNA Purification System (Promega Cat.# A1120). RNA for hybridization and RT-PCR was extracted from mycelia using the SV Total RNA Isolation System (Promega Cat.# Z3101) and plasmid DNA isolated using the PureYield(TM) Plasmid Midiprep System (Cat.# A2492). (3919)

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Cancer Res. 68, 6803-6809. Mutation of genes affecting the RAS pathway is common in childhood acute lymphoblastic leukemia 2008

Case, M., Matheson, E., Minto, L., Hassan, R., Harrison, C.J., Bown, N., Bailey, S., Vormoor, J., Hall, A.G. and Irving, J.A.E.

Notes: The authors of this study investigated the relationship of somatic mutations that deregulate the RAS-RAF-MEK-ERK pathway and Acute Lymphoblastic Leukemia (ALL) and its progression to relapse in some patients. They show that such mutations are common in ALL and its recurrence. Furthermore, lymphoblasts from patients with mutations that were associated with upregulation of ERK showed increased cytotoxicity over wild-type controls when treated with U0126, suggesting that specific ERK inhibitors may eventually yield useful therapeutics. Following drug exposure, cytotoxic effects were assessed using the CellTiter 96® AQueous One Solution Cell Proliferation Assay. (3905)

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J. Biol. Chem. 283, 21579–87. ATP modulation of Ca2+ release by type-2 and type-3 inositol (1, 4, 5)-triphosphate receptors. Differing ATP sensitivities and molecular determinants of action. 2008

Betzenhauser, M.J., Wagner, L.E. 2nd, Iwai, M., Michikawa, T., Mikoshiba, K. and Yule, D.I.

Notes: The authors examined the different ATP sensitivities of inositol (1,4,5)-triphosphate receptor (InsP3R) isoforms InsP3R1, InsP3R2 and InsP3R3. To compare the ATP-binding properties of InsP3R2 and InsP3R3, nucleotide sequences encompassing the ATP-binding domains were amplified by PCR and cloned into the pFN2A (GST) Flexi® Vector. The ATP-binding sites were expressed as glutathione-S-transferase (GST) fusion proteins in BL21(DE3)pLysS cells. Fusion proteins were purified, and the GST tag removed by cleavage with tobacco etch virus (TEV) protease. Purified proteins were then used in a fluorescent ATP-binding assay. (3901)

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Br. J. Ophthalmol. 92, 848–851. Mutations in the quinolone resistance determining region in Staphylococcus epidermidis recovered from conjunctiva. 2008

Yamada, M., Yoshida, J., Hatou, S., Yoshida, T. and Minagawa, Y.

Notes: To study how mutations in the quinolone resistance determining region (QRDR) of Staphylococcus epidermidis may have a role in fluoroquinolone resistance, 138 samples of S. epidermidis were swabbed from the conjunctival sacs of 129 patients. These samples were cultured overnight in tryptic soy broth, and genomic DNA isolated using the Wizard® SV 96 Genomic DNA Purification System. One microliter of the isolated DNA was used in PCR for the QRDR genes (gyrA, gyrB, parC and parE). (3939)

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J. Biol. Chem. May 6, Epub (ahead of print). Mechanism mediating the enhanced transcription of P2X3 receptor gene by calcitonin gene related peptide in trigeminal sensory neurons. 2008

Simonetti, M., Giniatullin, R., and Fabbretti, E.

Notes: These authors investigated the mechanism of action of the migraine mediator calcitonin gene-related peptide (CGRP), which is known to sensitize the P2X3 pain receptors to increase impulse flow to brain stem trigeminal nuclei. They showed that CAM KII inhibitors prevented CGRP-induced upregulation of P2X3 mRNA using real-time RT-PCR, and then confirmed that active CAM KII was involved in the signaling mechanism by staining with Anti-ACTIVE® CAM KII Antibodies. The immunoreactivity was upregulated by CGRP treatment of trigeminal neurons, and the distribution of the active CAM KII was localized to the membrane region. They then examined the mechanism of transcriptional activation of the P2X3 pain receptor genes and showed that the transcription factor CREB, which is known to be dependent on CAM KII for activation and nuclear localization, was involved. The authors also investigated the role of BDNF in the process, because CGRP is known to promote BDNF expression by trigeminal neurons, and because BDNF is thought to be involved in pain processing. They used the BDNF Emax Immunoassay System to measure BDNF levels in culture media after application of CGRP to neuronal cell cultures, and demonstrated that there was a fourfold increase in BDNF after CGRP exposure. They also showed that BDNF promoted CAMKII and CREB activation. (3873)

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Stem Cells 26, 1841-1849. Embryonic Stem Cells as a Platform for Analyzing Neural Gene Transcription 2008

Zhang, X., Horrell, S.A., Delaney, D., Gottlieb, D.I.

Notes: The authors note that while spatially and temporally specific gene transcription is a fundamental process in the normal development of mammalian stem cells, transcription in stem cells is currently studied by a set of methodologies with significant limitations. For instance, transient transfections analyze gene regulatory elements in nonchromosomal context. Using transgenic mice places transgenes in chromosomal context, however the chromosomal site where the transgene is inserted strongly influences the transgenes expression. As well, the need to make transgenic mice limits the number of experiments that can be done. ESCs can overcome these limitation. Undifferentiated stem cells are suitable for genetic engineering approaches such as gene targeting and recombinase-mediated cassette exchanges. By using such techniques, precisely planned alteration of native genes such as insertion of reporters, deletions of nearby or distant DNA sequences and mutational substitutions can be made. The authors wanted to analyze the Olig2 gene, a helix-loop-helix transcription factor expressed in the developing nervous system. Because Olig2 plays a central role in differentiation, understanding how it is regulated is important to understanding the larger transcriptional network controlling development. To this end, the authors used vectors for transient transfection experiments, constructed by amplifying regions of the Olig2 gene by PCR using primers tailed with appropriate restrictions sites and cloning the fragments into a pGL3 Luciferase Reporter Vector (Cat. # E1741, E1751, E1761, E1771). Promoter-reporter DNA was transfected into ESCs, cells were cultured 24 hours, then luciferase assays (Promega, type not specified) used to measure transgene expression. (3918)

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Phytopathology 97, 865-872. Multiplex real-time quantitative PCR to detect and quantify Verticillium dahliae colonization in potato lines that differ in response to Verticillium wilt. 2007

Atallah, Z.K., Bae, J., Jansky, S.H., Rouse, D.I., and Stevenson, W.R.

Notes: These authors developed a quantitative, real-time PCR method for the detection of Verticillium dahliae in potato cultivars. V. dahiae is the causative agent of Verticillium wilt, also known as potato early dying (PED). The standard detection method is a plating assay that takes 2 weeks to complete. The authors of this study performed qPCR assays using the V. dahliae beta tubulin-2 gene as a target. Initially, they amplified, subcloned and sequenced seven different genes in order to identify targets that were polymorphic among the genus Verticillium, but monoprphic in V. dahliae. After selection of beta-tubulin 2 as a suitable target, monoplex and duplex qPCR assays were performed using a Bio-Rad iCycler thermal cycler and 1ng DNA from various cultivars. For the duplex assays, the Plexor® qPCR System was used to amplify both beta-tubulin 2 and beta-actin genes simultaneously. One beta-tubulin primer was labeled with FAM, and one actin primer was labeled with Redmond Red phopsphoramidite. Amplifications were performed in 25µl reactions with 200nM each primer, 1ng DNA, and the Plexor® Master Mix. Cycling conditions were as follows: 2 minutes at 95°C; 40 cycles of 5s at 95°C, 35s at 61°C. Melt curve analysis was performed to confirm the specificity of the amplification products. The qPCR assays were shown to be faster and more sensitive than the standard plating technique, and were one order of magnitude more sensitive than other PCR-based assays. (3673)

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Nucl. Acids Res. 35, 2060–73. In vivo and in vitro investigation of bacterial type B RNase P interaction with tRNA 3'-CCA. 2007

Wegscheid, B. and Hartmann, R.K.

Notes: The authors used RT-PCR to quantitate the level of rnpB expression after complementing the Bacillus subtilis rnpB mutant strain SSB318 with wildtype or mutant rnpB genes from S. aureus or B. subtilis. Preliminary experiments with decreasing amounts of RNA template were performed to show that rnpB RT-PCR product yields were linearly dependent on RNA template amounts after 12 PCR cycles. RT-PCR was performed using the Access RT-PCR System. (3794)

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Emerging Infect. Dis. 13, 1756-1758. Human Bocavirus infection in children with gastroenteritis, Brazil. 2007

Albuquerque, M.C., Rocha, L.N., Benati, F.J., Soares, C.C., Maranhão, A.G., Ramírez, M.L, Erdman, D., and Santos, N.

Notes: In this study, the Wizard® Genomic DNA Purification Kit was used to extract DNA from diluted fecal samples. The extracted DNA was used in PCR with specific primers to detect viral sequences. PCR fragments were gel-purified using the SV Gel and PCR Clean-Up System prior to sequencing to confirm the Bocavirus DNA identity. (4221)

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J. Immunol. 178, 986-92. Identification of CXCL11 as a STAT3-dependent gene induced by IFN. 2007

Yang, C.H., Wei, L., Pfeffer, S.R., Du, Z., Murti, A., Valentine, W.J., Zheng, Y. and Pfeffer, L.M.

Notes: The STAT proteins are involved in the transcriptional response to interferon (IFN), which includes induction of CXCL11 and ISG15 genes. The authors used quantitative real-time PCR to examine CXCL11 and ISG15 expression levels in IFN-sensitive and IFN-resistant cells after IFN treatment. Expression levels of the IFN-responsive genes were normalized to that of β-actin. Total RNA was isolated from untreated and IFN-treated cells, and qPCR was performed on a Bio-Rad iCycler® instrument using the AccessQuick™ RT-PCR System and SYBR® Green I. Reverse transcription was performed at 48°C for 45 minutes, followed by 35 cycles of PCR. Prior to qRT-PCR, PCR product size was confirmed by agarose gel electrophoresis, and PCR specificity was checked by analyzing melting curves. (3767)

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Microbiology 153, 3023–3033. Expression analysis of extracellular proteins from Phanerochaete chrysosporium grown on different liquid and solid substrates. 2007

Sato, S., Liu, F., Koc, H. and Tien, M.

Notes: The authors characterized expression of extracellular proteins by white-rot fungus, Phanerochaete chrysosporium, grown on wood. Temporal expression of these proteins was monitored by relative quantitative RT-PCR. Two micrograms of total RNA was reversed transcribed using 1µg of Random Primers at 37°C for 1 hour. PCRs with one set of PCR primers were performed using 0.5 units of GoTaq® DNA Polymerase, 1X reaction buffer, 250µM each dNTP, 0.5µM each primer and 1µl of cDNA. PCRs with two sets of PCR primers were performed using 2.5 units of GoTaq® DNA Polymerase, 1.6X reaction buffer, 500µM each dNTP, 0.5µM each primer and 1µl of cDNA. (3708)

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Mol. Biol. Cell 18, 2795–804. A developmentally regulated chaperone complex for the endoplasmic reticulum of male haploid germ cells. 2007

van Lith, M., Karala, A.R., Bown, D., Gatehouse, J.A., Ruddock, L.W., Saunders, P.T. and Benham, A.M.

Notes: PDILT is a protein disulfide isomerase (PDI) homolog under developmental control and is induced during puberty. To determine whether PDILT expression coincides with the first wave of spermatogenesis, the authors examined expression of PDILT in 2-, 15-, 30-, 45- and 58-day old rats using RT-PCR. Total RNA was isolated from rat testis, and 50ng was amplified using the AccessQuick™ RT-PCR System and primer pairs specific for PDILT, PDI and calmegin, a testis-specific chaperone that is expressed upon the appearance of spermatocytes. Primer pairs were designed to span introns to avoid amplification of genomic DNA. PCR products were analyzed on a 1% agarose gel. Results showed that PDILT mRNA was first detected during the onset of spermatogenesis. (3765)

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Can. J. Vet. Res. 71, 230–235. Presence of non-O157 Shiga toxin-producing Escherichia coli in feces from feedlot cattle in Alberta and absence on corresponding beef carcasses. 2007

Renter, D.G., Bohaychuk, V., Van Donkersgoed, J. and King, R.

Notes: Beef carcasses were tested for the presence of non-O157 Shiga toxin-producing Escherichia coli (STEC) to determine prevalence and serotypes. Carcasses were swabbed with a sponge, incubated in brain–heart infusion broth and 300µl of growth transferred to a separate tube. The bacteria were diluted in water, spun and then the DNA isolated using the Magnesil® KF, Genomic System on the Thermo Electron KingFisher® mL instrument. This extracted DNA was then tested by multiplex PCR for the Shiga toxin 1 (stx1) and Shiga toxin 2 (stx2) genes. (3762)

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Brain Res. 1127, 66–75. Molecular characterization and gene expression of the pituitary adenylate cyclase-activating polypeptide (PACAP) in the lizard brain. 2007

Valiante, S., Prisco, M., Capaldo, A., Zambrano, I., De Falco, M., Andreuccetti, P., Laforgia, V., and Varano, L.

Notes: The authors cloned pituitary adenylate cyclase-activating polypeptide (PACAP) from lizard (Podarcis sicula) brain. They then isolated total RNA from lizard brain using the SV Total RNA Isolation System and used 4µg of total RNA in a reverse transcription with ImProm-II™ Reverse Transcriptase and oligo(dT)15 primers at 37°C for 1.5 hours. The PACAP cDNA was amplified by PCR, and the resulting PCR products were cleaned up using the Wizard® SV Gel and PCR Clean-Up System prior to sequencing. (3666)

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Forensic Sci. Int. 48, 478–85. Highly effective DNA extraction method for nuclear short tandem repeat testing of skeletal remains from mass graves. 2007

Davoren, J., Vanek, D., Konjhodzic, R., Crews, J., Huffine, E. and Parsons, T.J.

Notes: The authors compared two DNA extraction methods: the International Commission on Missing Persons silica method and the standard phenol:chloroform method to determine the preferred method for extraction of DNA from skeletal remains. The efficacy of DNA extraction was measured by real-time PCR to quantify DNA and to check for the presence of PCR inhibitors, and by amplification with the PowerPlex® 16 System. DNA was extracted from processed bone powder, and 10µl of the final extract was amplified using the PowerPlex® 16 System and GeneAmp® PCR System 9700 according to the manufacturer's recommendations, except that the extension time was doubled from 30 seconds to 60 seconds for the first 10 cycles and from 45 seconds to 90 seconds for the next 22 cycles. Amplified products were detected using the ABI PRISM® 3100 Genetic Analyzer. The authors concluded that the silica-based method gave better results in autosomal STR typing than the organic extraction method. (3818)

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J. Endocrinol. 197, 201–12. Neonatal exposure to bisphenol A modifies the abundance of estrogen receptor alpha transcripts with alternative 5'-untranslated regions in the female rat preoptic area. 2007

Monje, L., Varayoud, J., Luque, E.H. and Ramos, J.G.

Notes: The authors investigated the effect of neonatal bisphenol A (BPA) exposure in rats on expression of estrogen receptor α (ERα) transcripts. Alternative ERα transcripts in preoptic area of treated and untreated rats were quantified using real-time RT-PCR. Reverse transcription was performed using 4µg of total RNA, 200pmol random primers and 300 units M-MLV Reverse Transcriptase. Real-time PCR was performed using SYBR® Green I to quantify amplified products. To determine if the changes in BPA-induced ERα transcript expression were caused by DNA methylation, the methylation status of the five ERα promoters was examined by bisulfite modification. Genomic DNA was isolated from rat tissue using the Wizard® Genomic DNA Purification Kit, denatured with NaOH, then treated with hydroquinone and sodium bisulfite. Prior to methylation-specific PCR, DNA was cleaned up using the Wizard® DNA Purification Resin as directed by the manufacturer. PCR products were cleaned up again using the Wizard® SV Gel and PCR Clean-Up System, then subjected to restriction enzyme digestion and agarose gel electrophoresis to reveal methylation-dependent sequence differences. (3911)

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Infect. Immun. 75, 3478–89. Reversal of the antichlamydial activity of putative type III secretion inhibitors by iron. 2007

Slepenkin, A., Enquist, P.A., Hägglund, U., de la Maza, L.M., Elofsson, M. and Peterson, E.M.

Notes: The authors screened members of a class of acylated hydrazones of salicylaldehydes (INPs) to characterize their ability to inhibit growth of Chlamydia by affecting the type III secretion (T3S) system, a potent virulence mechanism. Expression levels of various T3S genes and gene markers of early, middle and late developmental cycles were examined by RT-PCR in Chlamydia trachomatis-infected HeLa 229 cells in the presence and absence of INPs. HeLa229 RNA was isolated at 4, 8, 24 and 36 hours postinfection, treated with RQ1 RNase-Free DNase and amplified using the Access RT-PCR System in the presence of 0.5 units of RNasin RNase Inhibitor. Each set of experiments included a no-reverse transcriptase control reaction to control for DNA contamination and a positive control reaction using the Positive Control RNA with Carrier and control primers supplied with the kit. (3795)

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Exp. Biol. Med. 232, 1195–1203. 13-cis-Retinoic acid alters intracellular serotonin, increases 5-HT1A receptor, and serotonin reuptake transporter levels in vitro. 2007

O'Reilly, K.C., Trent, S., Bailey, S.J. and Lane, M.A.

Notes: The authors examined the regulatory effect of 13-cis-retanoic acid (13-cis-RA) on genes that encode proteins involved in serotonergic neurotransmission in the RN46A-B14 cell line, which was derived from rat embryonic raphe nuclei. Northern blot analysis was performed to quantitate mRNA levels of these genes in 13-cis-RA-treated and untreated cells. cDNA templates for generating Northern blot probes were synthesized by reverse transcription using the Reverse Transcription System followed by PCR. The Reverse Transcription System was also used in RT-PCR to check for the expression of retinoic acid and retinoid X receptors (RAR and RXR, respectively) in RN46A-B14 cells. Briefly, 1µg of total RNA was treated with DNase, reverse transcribed using oligo (dT) primers, then amplified by PCR using RARα, RARβ, RXRα, RXRβ/γ primers. (3790)

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Cancer Res. 67, 10600–10607. Interaction of the tumor metastasis suppressor nonmetastatic protein 23 homologue H1 and estrogen receptor alpha alters estrogen-responsive gene expression. 2007

Curtis, C.D., Likhite, V.S., McLeod, I.X., Yates, J.R. and Nardulli, A.M.

Notes: Tumor metastasis suppressor nonmetastatic protein 23 homologue 1 (NM23-H1) interacts with estrogen receptor α (ERα) and influences ERα-mediated gene expression. The authors knocked down NM23-H1 expression using RNA interference in estrogen-treated or untreated MC-7 human breast cancer cells and determined the effect on transcription of estrogen-responsive genes, including progesterone receptor, Bcl-2, cathepsin D and cyclin D1. Levels of these mRNAs were measured in the presence of NM23-H1 or control small interfering RNAs using quantitative RT-PCR. Total RNA was treated with RQ1 RNase-Free DNase to remove contaminating DNA, and cDNA was synthesized using the Reverse Transcription System. The resulting cDNA was subjected to quantitative PCR using SYBR® Green dye. (3789)

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J. Biol. Chem. 282, 21818–21828. Degradation of hsp70 and other mRNAs in Drosophila via the 5´ 3´ pathway and its regulation by heat shock. 2007

Bönisch, C., Temme, C., Moritz, B. and Wahle, E.

Notes: The authors studied hsp70 mRNA degradation in Drosophila Schneider cells. mRNA deadenylation and decay were monitored by Northern blot. Two of the Northern blot probes used to visualize the mRNA decay products were synthesized by transcription of linearized plasmids using T7 RNA Polymerase and [α-32P] UTP. A population of deadenylated mRNA was created by hybridizing mRNA with oligo(dT) and treating with RNase H. CCR4•NOT was identified as the main deadenylase involved in mRNA decay, and the PAN2:PAN3 deadenylase was a minor contributor. RNA interference was used to knock down expression of PAN2 and CAF1, a subunit of CCR4•NOT, to assess the effect on mRNA decay. Reduced expression levels of PAN2 and CAF1 were confirmed by semi-quantitative RT-PCR and Western blotting, respectively. RT-PCR was performed using 1.5µg total RNA and 150 units of MMLV Reverse Transcriptase in a 25µl reaction. One microliter of the RT reaction was used as a template in an 80µl PCR using 0.5 units of GoTaq® DNA Polymerase, 1.5mM MgCl2 and 1X Green GoTaq® Flexi Reaction Buffer. (3707)

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Hum. Mutat. 0, 1-6. Novel Plexor SNP genotyping technology: comparisons with TaqMan and homogenous MassEXTEND MALDI-TOF mass spectrometry. 2007

Tindall, E.A., Speight, G., Petersen, D.C., Padilla, E.J., and Hayes, V.M.

Notes: This study compared the performance of the Plexor® qPCR System with the TaqMan® and MassEXTEND™ methods for genotyping analysis of 11 SNPs in >2000 DNA samples. All three methods were shown to be equivalent in call rate and accuracy. The Plexor® System is described as a cost-effective, efficient alternative to the TaqMan® technology for medium-throughput SNP analysis. Plexor® qPCR System reactions contained 5ng template DNA, 0.2µl 5µM allele-specific primers, 0.2µl 10µM anchor primer, and 2.5µl 2X Plexor™ Master Mix in a total volume of 5µl. PCR was performed on an ABI PRISM® 7900HT Sequence Detection System using the following cycling conditions: 95°C for 2 minutes; 50°C for 35s; and 40 cycles of 95°C for 5s, 60°C for 35s. Primers were designed using the Plexor® Primer Design Software. (3674)

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