{"id":2285,"date":"2026-09-26T01:12:00","date_gmt":"2026-09-25T16:12:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-26-chromosome-fragile-sites-en\/"},"modified":"2026-09-26T01:12:00","modified_gmt":"2026-09-25T16:12:00","slug":"2026-09-26-chromosome-fragile-sites-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-26-chromosome-fragile-sites-en\/","title":{"rendered":"Single-cell maps split chromosome \u201cbreak-prone sites\u201d into several classes"},"content":{"rendered":"

2026-09-26 01:12 KST<\/strong><\/p>\n

Researchers mildly disrupted DNA replication with aphidicolin and jointly analysed break positions and replication timing in 480 single cells.<\/p>\n

They recovered known common fragile sites and rare breaks hidden in population averages, then grouped them by location and replication pattern.<\/p>\n

Why bulk maps miss rare breaks<\/h2>\n

Mixing many cells emphasizes sites that recur. Cell-by-cell maps retain events seen in only one or two cells and connect frequency with the surrounding replication state.<\/p>\n

Not every site breaks for one reason<\/h2>\n

Some overlapped large, late-replicating genes; others related to sparse replication origins or boundary regions. One explanation based only on late replication was insufficient.<\/p>\n

\"Single-cell
This AI-generated image explains the topic; it is not a photograph of an actual event, observation or field site.<\/figcaption><\/figure>\n

Limits for cancer claims<\/h2>\n

Replication stress and rearrangements matter in cancer, but this study did not measure tumours or patient outcomes. Cell type and drug conditions can change the map.<\/p>\n

Next check<\/h2>\n

The classes need replication in other cells and natural stresses. Comparing them with real tumour rearrangements can test which rare breaks persist in disease.<\/p>\n

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

Primary source: Nature Communications paper<\/a><\/p>\n

Institutional explanation: RIKEN research release<\/a><\/p>\n

Independent check: JST science release index<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Single-cell whole-genome analysis captured low-frequency chromosome breaks and revealed fragile-site classes with different replication timing and causes. The experiment used drug-treated mammalian cells in culture, so it is not a test that predicts a person\u2019s cancer risk.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2285","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2285","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=2285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}