{"id":1626,"date":"2026-08-30T17:51:00","date_gmt":"2026-08-30T08:51:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-08-30-dna-self-blinking-probes-en\/"},"modified":"2026-08-30T17:51:00","modified_gmt":"2026-08-30T08:51:00","slug":"2026-08-30-dna-self-blinking-probes-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-08-30-dna-self-blinking-probes-en\/","title":{"rendered":"Self-blinking fluorescent molecules reveal DNA folding in living cells at 20 nm"},"content":{"rendered":"

2026-08-30 17:51 KST<\/strong><\/p>\n

Researchers created self-blinking fluorescent molecules called HoTs and imaged DNA folding and movement inside living cells at about 20-nanometre resolution. In chemically fixed cells, they localized individual dye molecules with about 3-nanometre precision.<\/p>\n

This does not mean the DNA double helix was photographed at 3 nanometres inside a living person, or that a cancer test is ready. The sharpest 3-nanometre result came from preserved cells, and the patient-tissue work was an early comparison of sections from only three people with bowel cancer.<\/p>\n

Why must the fluorescent molecules blink?<\/h2>\n

If every dye shines at once, nearby points merge into one blur. HoT probes enter cells, bind to DNA and switch on at different moments. A microscope combines the locations of light from thousands of frames to build a map much finer than an ordinary light microscope can produce.<\/p>\n

Do 20 nm and 3 nm describe the same result?<\/h2>\n

No. STORM produced about 20-nanometre resolution in living human skin cells and cultured HeLa cancer cells. The 3-nanometre figure is MINFLUX localization precision for a single dye molecule in fixed laboratory cells. A DNA double helix is about 2 nanometres wide, but localization precision and the resolution of a completed image are not the same measure.<\/p>\n

\"Self-blinking
This AI-generated image explains the topic; it is not a photograph of the actual event, observation, or experiment.<\/figcaption><\/figure>\n

What did the patient tissue show?<\/h2>\n

The researchers tested paraffin-preserved sections from three people with bowel cancer. DNA in tumour areas appeared less compact and more spread out than in neighbouring healthy tissue. But a three-person exploratory sample cannot establish sensitivity or false-positive rates, and the probe stains all DNA rather than one cancer gene.<\/p>\n

What does the AI result of 96\u201398% mean?<\/h2>\n

The team\u2019s AINU program distinguished skin cells from stem cells in the new images with 96\u201398% accuracy. The cell types carry the same DNA sequence but fold it differently. This was not accuracy for diagnosing cancer patients, and it was not a test separating cancer from healthy tissue in an independent hospital cohort.<\/p>\n

What must be checked next?<\/h2>\n

Researchers need to reproduce the image quality across laboratories and tissues and test whether 3-nanometre-scale work is possible in living cells. Any cancer test would require many more patients and diseases and a comparison with standard pathology. Follow-up work must also address gene-specific targeting and safety.<\/p>\n

Primary sources and independent checks<\/h2>\n

Molecular Cell original paper<\/a><\/p>\n

CRG official research explanation<\/a><\/p>\n

Phys.org independent edited report<\/a><\/p>\n

PubMed-indexed record<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

New HoT probes imaged DNA packing in living cells at 20 nm resolution and localized dye molecules in preserved cells with 3 nm precision. This is not yet a cancer test.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-1626","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/1626","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=1626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}