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Herein we address telomere length (TL) dynamics in primary colorectal cancer (CRC) tumour tissues and corresponding liver metastases. TL was measured by multiplex monochrome real-time qPCR in paired samples of primary tumours and liver metastases along with non-cancerous reference tissues obtained from 51 patients diagnosed with metastatic CRC.\u00a0Telomere shortening was observed in the majority of primary tumour tissues compared to non-cancerous mucosa (84.1%, p\u2009&lt;\u20090.0001). Tumours located within the proximal colon had shorter TL than those in the rectum (p\u2009&lt;\u20090.05). TL in liver metastases was not significantly different from that in primary tumours (p\u2009=\u20090.41). TL in metastatic tissue was shorter in the patients diagnosed with metachronous liver metastases than in those diagnosed with synchronous liver metastases (p\u2009=\u20090.03). The metastatic liver lesions size correlated with the TL in metastases (p\u2009&lt;\u20090.05). Following the neoadjuvant treatment, the patients with rectal cancer had shortened telomeres in tumour tissue than prior to the therapy (p\u2009=\u20090.01). Patients with a TL ratio between tumour tissue and the adjacent non-cancerous mucosa of\u2009\u2265\u20090.387 were associated with increased overall survival (p\u2009=\u20090.01). This study provides insights into TL dynamics during progression of the disease. The results show TL differences in metastatic lesions and may help in clinical practice to predict the patient\u2019s prognosis.<\/jats:p>","DOI":"10.1038\/s41598-023-35835-9","type":"journal-article","created":{"date-parts":[[2023,6,5]],"date-time":"2023-06-05T09:02:33Z","timestamp":1685955753000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["The dynamics of telomere length in primary and metastatic colorectal cancer lesions"],"prefix":"10.1038","volume":"13","author":[{"given":"Michal","family":"Kroupa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ondrej","family":"Kubecek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristyna","family":"Tomasova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Petr","family":"Hanak","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marketa","family":"Krupova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Klara","family":"Cervena","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna","family":"Siskova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jachym","family":"Rosendorf","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Petr","family":"Hosek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ludmila","family":"Vodickova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pavel","family":"Vodicka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vaclav","family":"Liska","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stanislav","family":"John","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Veronika","family":"Vymetalkova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiri","family":"Petera","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,6,5]]},"reference":[{"key":"35835_CR1","doi-asserted-by":"publisher","first-page":"122","DOI":"10.1159\/000438614","volume":"38","author":"H Jia","year":"2016","unstructured":"Jia, H. & Wang, Z. 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