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Technoclinic > NEWS > Finger Prick Blood Test May Help Detect Cancer
NEWS

Finger Prick Blood Test May Help Detect Cancer

srijita
Last updated: 2016/02/17 at 6:19 AM
srijita
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Finger Prick Blood Test May Help Detect Cancer

In the new technique, nanotechnology is used to determine whether a specific target nucleic acid sequence exists within a mixture. (Representational Image)

Washington:   A simple finger prick blood test may be used to diagnose cancer, say scientists who have developed a new technology to detect disease biomarkers in the form of nucleic acids, the building blocks of all living organisms.

Nucleic acids consist of chains or sequences of bases stretching from just a few to millions of elements long. The exact order in which these bases are found, even over short distances, is strongly tied to their functions, and therefore can be used as direct indicators of what is going on inside cells and tissue.

For example, one family of these nucleic acids known as microRNAs are only about 20 bases long, but can signal a wide range of diseases, including cancer.

In the new technique, nanotechnology is used to determine whether a specific target nucleic acid sequence exists within a mixture, and to quantify it if it does through a simple electronic signature.

“If the sequence you are looking for is there, it forms a double helix with a probe we provide and you see a clear signal. If the sequence is not there, then there is not any signal,” said Adam R Hall from Wake Forest Baptist Medical Centre in US.

“By simply counting the number of signals, you can determine how much of the target is around,” said Mr Hall. In the study, researchers first demonstrated that the technology could effectively identify a specific sequence among a background of competing nucleic acids, and then applied their technique to one particular microRNA (mi-R155) known to indicate lung cancer in humans.

They showed that the approach could resolve the minute amount of microRNAs that can be found in patients. “We envision this as a potential first-line, noninvasive diagnostic to detect anything from cancer to the Ebola virus,” said Hall.

“Although we are certainly at the early stages of the technology, eventually we could perform the test using a few drops of blood from a simple finger prick,” Hall said.

The findings were published in the journal Nano Letters.

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TAGGED: Blood, Cancer, Detect, Finger, Help, May, Prick, Test

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srijita February 17, 2016
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