Stories about: DNA

To monitor health, simply trip the ‘nanoswitches’

WATCH: DNA nanoswitches change shape in the presence of biomarkers. The shape change is revealed in a process called gel electrophoresis. Credit: Wyss Institute at Harvard University

“Nanoswitches” — engineered, shape-changing strands of DNA — could shake up the way we monitor our health, according to new research. Faster, easier, cheaper and more sensitive tests based on these tools — used in the lab or at point of care — could indicate the presence of disease, infection and even genetic variabilities as subtle as a single-gene mutation.

“One critical application in both basic research and clinical practice is the detection of biomarkers in our bodies, which convey vital information about our current health,” says lead researcher Wesley Wong, PhD, of Boston Children’s Hospital Program in Cellular and Molecular Medicine (PCMM). “However, current methods tend to be either cheap and easy or highly sensitive, but generally not both.”

That’s why Wong and his team have adapted their DNA nanoswitch technology — previously demonstrated to aid drug discovery and the measure of biochemical interactions — into a new platform that they call the nanoswitch-linked immunosorbent assay (NLISA) for fast, sensitive and specific protein detection. It’s described this week in the Proceedings of the National Academy of Sciences.

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