Life Science

Researchers from North Carolina State University, Duke University and the University of Copenhagen have created the world’s largest DNA origami, which are nanoscale constructions with applications ranging from biomedical research to nanoelectronics.

Problem: PCR is used to detect or quantify nucleic acid sequences in research and diagnostic settings. While high specificity is often achieved, experimental design sometimes necessitates that primers be placed in suboptimal locations. This can lead to problems like the formation of primer dimers or off-target amplification of homologous sequences. The formation of primer dimers consumes primers and other reaction components, which can result in reduced target amplification. These structures can also generate false positive signals in real-time PCR assays that use DNA intercalating dyes to monitor amplification. Off-target amplification is particularly problematic with low copy-number targets because of the high number of cycles required for amplification and in multiplex assays, where many different primers must function well together.

The ability to accurately repair DNA damaged by spontaneous errors, oxidation or mutagens is crucial to the survival of cells. This repair is normally accomplished by using an identical or homologous intact sequence of DNA, but scientists have now shown that RNA produced within cells of a common budding yeast can serve as a template for repairing the most devastating DNA damage – a break in both strands of a DNA helix.

What if repairing large segments of damaged muscle tissue was as simple as mobilizing the body’s stem cells to the site of the injury? New research in mice and rats, conducted at Wake Forest Baptist Medical Center’s Institute for Regenerative Medicine, suggests that “in body” regeneration of muscle tissue might be possible by harnessing the body’s natural healing powers.

Scientists develop algorithm to uncover genomic insertions and deletions involved in autism, OCD.

Scientists at the University of Kentucky, led by nano-biotechnologist Peixuan Guo, have made some critical discoveries over the past year into the operation of biomotors, the molecular machines used by viruses and bacteria in the packaging of DNA.













