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Periodontal Pockets Microbiota qPCR Analysis at Different Stages of Periodontitis
Oksana Zorina and Denis Rebrikov

Six major periodontal pathogens were quantified (with standardization to human gDNA) in periodontal pockets of periodontitis patients and healthy subjects by original qPCR assay. Relative amount of pathogens to total bacterial mass increased for P.gingivalis (100-fold), P.intermedia (10-fold) and T.forsythensis (10-fold).

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Low-volume on-chip single sperm cell analysis
Pickrahn I. E. ,Schmidt-Gann G., Kroneis T.

We performed low-volume on-chip DNA typing of single sperm cells isolated by means of laser microdissection. 16plex PCR was successful in 39 of 40 single cell samples yielding a mean PCR efficiency of 62.8%. In addition, we were able to identify a single-cell sample containing more than one cell enabling us to monitor the quality of the whole procedure, and hence, exclude “contaminated” samples from further analysis.

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Development and NDA-Level Validation of a Real-Time PCR Procedure for Detection and Quantification of Residual E.coli DNA Contamination of Biopharmaceutical Products
Dan Papa, Pedro J. Morales and Michael D. Sadick

Escherichia coli (E. coli) has been commonly used for the production of biopharmaceuticals. Among the impurities that must be monitored in biopharmaceuticals is residual host-cell DNA (HCD). This study describes the development and subsequent NDA-level validation of a real time PCR procedure developed in response to a client’s need to improve the sensitivity of detection and quantification of residual E. coli HCD in their drug product.

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Chemically Modified Primers for PCR and Ligation Applications
Elena Hidalgo Ashrafi, Sabrina Shore, Tony Le, Victor Timoshchuk, Natasha Paul, Richard Hogrefe, Inna Koukhareva, Alexandre Lebedev

PCR is an essential tool with utility in a variety of advanced applications. To improve the specificity of PCR, a unique approach to "Hot Start" PCR employing primers containing thermolabile modifications has been developed. These modified primers, named CleanAmp™ Primers, are amenable for use in Hot Start activation schemes as the modification is released after an initial denaturation step.

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Development of a Test Battery for Epigenetic Non-genotoxic Carcinogens
Haroon Rashid

The main objective of this sudy is to obtain an increased insight into the mechanisms of action of epigenetic carcinogens. Although the expected number of non-genotoxic carcinogens among newly registered compounds is unknown, there is a growing concern that when numbers of 2-year cancer bioassays are significantly reduced, non-genotoxic carcinogens may go undetected. Therefore there is a need for the development of alternative methods for their detection.

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Chemically Modified Primers for Improved Multiplex PCR
Elena Hidalgo Ashrafi, Tony Le, Alexandre Lebedev, Richard Hogrefe, Victor Timoshchuk, Sabrina Shore, Inna Koukhareva and Natasha Paul

Multiplex PCR is an advantageous technique used in PCR applications to amplify multiple targets in a single reaction. As useful as it is, this technique presents a new set of challenges that further complicates PCR setup. For example, reactions are more prone to off-target amplifications such as mis-priming and primer dimer due to the increased number of primer pairs.

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Hot Start dNTPs - Novel Chemistries for Use in Advanced PCR Applications
Tony Le, Elena Hidalgo Ashrafi, Sabrina Shore, Victor Timoshchuk, Natasha Paul, Richard Hogrefe, Inna Koukhareva, Alexandre Lebedev

PCR is a widely used scientific tool whose specificity can be increased by the use of Hot Start technologies. Although many Hot Start technologies exist, recently developed CleanAmp™ dNTPs are a distinct approach that employs modified nucleoside triphosphates with a thermolabile protecting group at the 3´-hydroxyl.

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ROLE OF IRF-8 IN THE INTERFACE OF MELANOMA TUMOR CELL-IMMUNE SYSTEM INTERACTION.
Fabrizio Mattei, Giovanna Schiavoni, Massimo Spada, Francesca Spadaro and Lucia Gabriele

Interferon-regulatory factor-8 is essential for differentiation and function of dendritic cells and thus for the induction of competent immune responses. Here, we investigated the role of IRF-8 in affecting immune response against melanoma. Our results reveal a critical role of IRF-8 in controlling melanoma growth and suggest that IRF-8-mediated antitumor activity is the result of a coordinated action between DC-mediated immune response and the tumor suppressor function of IRF-8.

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NEW TECHNOLOGIES FOR FFPE SAMPLES: Improved RNA Isolation and novel cDNA priming for qPCR and for universal mRNA amplification
G Krupp1; R Jaggi2; D Englert3, DJ Wilson3, S Laken3, S, ES Quabius4

Improved FFPE RNA isolation, novel TR priming for complete recovery of FFPE mRNA fragments. Differential expression defines Scores for tumor classification: comparing fresh-frozen with FFPE. Novel flow-through Ziplex microarray platform demonstrates MAQC performance level of data obtained with FFPE samples.

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Showing Results 21 - 30 of 85
Scientific News
Blood Test To Diagnose Depression
Test identifies nine blood markers tied to depression; predicts who will benefit from therapy.
Redefining High Risk Patients With Stage II Colon Cancer
microRNA-21 identified as an independent prognostic biomarker.
More People Testing Positive for Chikungunya Virus in the U.S.
Clinical testing volume and positivity rate both grew after the first case of the infectious disease spread to Western Hemisphere this year.
Novel rhPCR Unravels Gene Expression
Method enables identification and analysis of highly similar alternatively spliced transcripts.
Detecting and Identifying Candida Species in Blood Samples of Critically Ill Paediatric Patients
The study aimed to develop a multiplex nested PCR method to detect and identify seven Candida species in peripheral blood samples of critically ill paediatric patients.
IDT Shares Comprehensive qPCR Resources
Special qPCR compendium issue of DECODED now freely available.
Determination of Arabidopsis Thaliana Telomere Length by PCR
Researchers have designed two telomeric degenerated primers that amplify Arabidopsis telomeres by MMQPCR.
Methods for Multiplex Template Sampling in Digital PCR Assays
This article presents Multiplex Template Sampling, an alternative strategy to effectively increase template concentrations in dPCR analysis.
Detection of Large Expansions in Myotonic Dystrophy Type 1
The aims of this study were to verify the validity of triplet primed-PCR for the diagnosis of patients presenting with DM1 clinical findings and to simplify the testing procedure.
The 2014 Annual MO BIO Microbiome Awards, Offering More Than $10,000 of Prizes
The Microbiome Awards aim to provide young, extraordinary scientists with funding and recognition to carry out scientific work in the field of microbiome research.
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