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Archive for the ‘Bio-Rad Product Highlight’ Category

Droplet Digital™ PCR Goes Mainstream

 :: Posted by American Biotechnologist on 12-03-2012

Evaluating a treatment for AIDS. Analyzing archival cancer samples. Tracking the RNA of a mutated gene known to cause cancer. Researchers recently met in San Diego to discuss these and many other ways they are using Bio-Rad Laboratories, Inc.’s QX100 Droplet Digital PCR system to achieve their research goals. Bio-Rad’s second QX100 User Group Meeting will be held Dec. 6–7, 2012 in Boston.

“Our first user group meeting demonstrated substantial traction for droplet digital PCR in applications that require unprecedented levels of sensitivity, precision, and reproducibility, such as the measurement of copy number variation and rare mutation/sequence detection,” said Viresh Patel, digital PCR marketing manager at Bio-Rad.

The research community has embraced the QX100 system since its release in October, 2011, as evidenced both by industry awards and the strong sales and market growth of the instrument, which is expected to continue. A recent survey conducted by The Scientist and research firm Frost & Sullivan found that 30 percent of non-digital PCR users plan to implement digital PCR in their labs in 2013. Frost & Sullivan believes the QX100 system will lead the digital PCR marketplace due to the instrument’s simplicity, performance, and affordability.

Researchers Share Droplet Digital Success Stories
During the first QX100 User Group Meeting in San Diego, academic, industry, and government researchers spoke about the benefits of droplet digital PCR (ddPCR™). Kerry Emslie, manager of the Bioanalysis Group at Australia’s National Measurement Institute, presented research published in Analytical Chemistry evaluating the performance of the QX100 system in quantifying DNA copy numbers. Using lambda genomic DNA as a model, she concluded that the system’s results are more precise than those typically observed using either real-time PCR or other digital PCR systems based on microfluidic chambers.

Dr. Hanlee Ji of the Stanford University School of Medicine spoke about his experience analyzing archival cancer samples using ddPCR analysis. In a recent report in Translational Medicine, Dr. Ji demonstrated that ddPCR improves accuracy and precision over real-time PCR when measuring copy number variation in genomic DNA from formalin-fixed paraffin-embedded (FFPE) cancer tissue.

“We run droplet digital PCR routinely,” said Dr. Ji. “It’s part of our set of genome technologies that allow us to conduct translational studies that have clinical implications.”

Users also presented research demonstrating the ultra-sensitivity of ddPCR for detecting rare events. Highlights included a contract research organization that screens for EGFR mutations in circulating nucleic acids, biotech researchers who quantify rare HIV DNA targets, and the development of a laboratory test that tracks the transcript of a fusion gene that activates cancer.

For more information about the upcoming Boston user group meeting, please contact Viresh Patel at viresh_patel(at)bio-rad.com or 925-474-8602.

Battle of the Blotters

 :: Posted by American Biotechnologist on 11-26-2012

For some reason, I just can’t get the “Eye of the Tiger” song out of my head! Gotta love this:

Now that you’re in the mood, how about taking a look at another epic battle!

Chemiluminescence, Multiplex Fluorescence and Routine Gel Imaging All In One

 :: Posted by American Biotechnologist on 11-13-2012

Expect More From Your Chemiluminescent Substrate

 :: Posted by American Biotechnologist on 10-31-2012

Obtaining high quality chemiluminescent blot images with little optimization is a challenge when dealing with a wide range of protein loads and expressions.

Bio-Rad’s new Clarity western ECL substrate provides high sensitivity (see Figure below), long signal duration, and low background even at long exposures. This combination of bright, long signal with low background makes it the perfect choice for routine use on film and digital imagers, even when re-imaging and multiple exposures are required.

The Clarity western ECL substrate is compatible with any HRP-conjugated secondary antibody and is offered in 200 and 500 ml size kits.

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TGX Stain-Free™ Precast Gels Facilitate LDL Research on Potential New Drug Targets

 :: Posted by American Biotechnologist on 10-24-2012

Cholesterol is a waxy fat produced in the human body that is associated with both low-density lipoproteins (LDLs) and high-density lipoproteins (HDLs). Due to genetic predisposition and lifestyle factors such as diet and exercise habits, LDL-associated cholesterol (LDL-C), the “bad” form of cholesterol, can accumulate on arterial walls and harden to form a plaque, causing a narrowing and loss of elasticity in these blood vessels. This process, known as atherosclerosis, or hardening of the arteries, increases the risk of cardiovascular diseases like heart attack and stroke.

Dr Frederick Bauzon, a postdoctoral researcher in Dr Ronald Krauss’s lab at the Children’s Hospital Oakland Research Institute (CHORI), is investigating the role of a candidate gene associated with HMGCR transcript levels discovered in a linkage study. The gene expression levels are “reduced” using a small interfering RNA (siRNA) and the effects on expression of the low-density lipoprotein receptor protein (LDLR) are examined. The established mechanism is that reducing LDLR expression decreases the amount of available receptor protein, which normally binds LDLs circulating in the bloodstream and transports them back inside the cell. The pathway was discovered ~20 years ago and has been of interest in drug target development due to its regulating role.

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