• This new blood test could detect cancer before it shows up on scans A new CRISPR-powered light sensor can detect the faintest molecular signs of cancer in a drop of blood. • Scientists have designed a powerful light based sensor capable of detecting extremely small amounts of cancer biomarkers in blood. • The innovation could eventually allow doctors to identify early warning signs of cancer and other diseases through a routine blood draw. • Biomarkers such as proteins, fragments of DNA, and other molecules can signal whether cancer is present, how it is progressing, or a person’s risk of developing it. • The difficulty is that in the earliest stages of disease, these markers exist in extremely low concentrations, making them hard to measure with conventional tools. • “Our sensor combines nanostructures made of DNA with quantum dots and CRISPR gene editing technology to detect faint biomarker signals using a light-based approach known as second harmonic generation (SHG),” said research team leader Han Zhang from Shenzhen University in China.
Article Summaries:
- This new blood test could detect cancer before it shows up on scans A new CRISPR-powered light sensor can detect the faintest molecular signs of cancer in a drop of blood. - Date: - February 16, 2026 - Source: - Optica - Summary: - A new light-based sensor can spot incredibly tiny amounts of cancer biomarkers in blood, raising the possibility of earlier and simpler cancer detection. The technology merges DNA nanotechnology, CRISPR, and quantum dots to generate a clear signal from just a few molecules. In lung cancer tests, it worked even in real patient serum samples. Researchers hope it could
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