Cited by 125Telomeres, Telomerase, and SenescenceGenetic factors in colorectal cancerCancer-related Molecular Pathways

Relationship between telomere shortening, genetic instability, and site of tumour origin in colorectal cancers

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Rampazzo, E, Bertorelle, R, Serra, L, Terrin, L, Candiotto, C, Pucciarelli, S, Bianco, P Del, Nitti, D +1 more·2010·British Journal of Cancer

Abstract

BACKGROUND: Telomeres, located at chromosome ends, are progressively shortened during each cell cycle by replication-dependent loss of DNA termini. Although maintenance of telomere length is critical for cell-replicative potential and tumourigenesis, the erosion of telomeres can lead to genetic instability, a pivotal mechanism in the neoplastic process. PATIENTS AND METHODS: A total of 118 colorectal cancer (CRC) samples (53 right-colon, 30 left-colon, and 35 rectal tumours) and corresponding adjacent non-cancerous tissues were evaluated for telomere length, p53 mutation, and microsatellite instability (MSI). Telomere length was estimated by real-time PCR. RESULTS: Telomeres were significantly shorter in CRCs than in adjacent tissues, regardless of tumour stage and grade, site, or genetic alterations (P<0.0001). Moreover, in normal tissues, but not in tumours, telomere length inversely correlated with age (r=-0.24, P=0.017). Telomere length in CRCs did not differ with tumour progression or p53 status; however, in CRCs carrying the wild-type p53, telomeres were significantly shorter in tumours with MSI than in those with stable microsatellites (P=0.027). Furthermore, telomere length differed according to tumour location, being longer in rectal cancers (P=0.03). CONCLUSIONS: These findings suggest that telomere shortening is a key initial event in colorectal carcinogenesis. The extent of telomere erosion is related to tumour origin site and may be influenced by the mismatch repair pathway.

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  • While earlier findings suggested that rectal cancers had a tendency to bear longer telomeres, a formal correlation between telomere length and tumor location is still debated.

    “Regarding TL and tumor location, while earlier findings suggested that rectal cancers had a tendency to bear longer telomeres [200], a formal correlation between TL and tumor location is still debated.”

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Research works printed but not linked: 1

  1. Greene FL, Page DL, Fleming ID, Fritz A, Balch CM, Haller DG (2002) American Joint Committee on Cancer Staging Manual. 6th edn, Springer: Philadelphia

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Authors
Rampazzo, E., Bertorelle, R., Serra, L., Terrin, L., Candiotto, C., Pucciarelli, S., Bianco, P. D., Nitti, D., & De Rossi, A.
Affiliations
  • University of Padua (IT)
  • Istituto Oncologico Veneto (IT)
Venue
British Journal of Cancer
Published
2010-04
Volume
102
Issue
8
Pages
1300-1305
ISSN
  • 0007-0920 (ISSN-L)
  • 1532-1827
OpenAlex
W2003751750
Cited by
125
References
42
Citations by year
2026: 3 · 2025: 1 · 2024: 9 · 2023: 6 · 2022: 4 · 2021: 6 · 2020: 6 · 2019: 7 · 2018: 9 · 2017: 4 · 2016: 6 · 2015: 14 · 2014: 16 · 2013: 11 · 2012: 13
FWCI
7.36
Type
journal article
Language
en
Open access
Locations
  • British Journal of Cancer (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by-nc-sa)
Funders
  • Ministero della Salute
  • Associazione Italiana per la Ricerca sul Cancro
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
telomere shortening, colorectal cancer, genomic instability, microsatellite instability, TP53 mutation, rectal cancer, right-sided colon cancer, left-sided colon cancer, DNA mismatch repair, carcinogenesis, telomere length
MeSH terms
Adult, Aged, Aged, 80 and over, Female, Humans, Intestinal Mucosa, Male, Middle Aged, Colorectal Neoplasms, Telomere, Telomerase, Genomic Instability

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