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Article Open Access

Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma

  • Authors:
    • Grazia Palomba
    • Antonio Cossu
    • Panagiotis Paliogiannis
    • Antonio Pazzola
    • Giovanni Baldino
    • Mario Scartozzi
    • Maria Teresa Ionta
    • Salvatore Ortu
    • Francesca Capelli
    • Annamaria Lanzillo
    • Tito Sedda
    • Giovanni Sanna
    • Michela Barca
    • Luciano Virdis
    • Mario Budroni
    • Giuseppe Palmieri
  • View Affiliations / Copyright

    Affiliations: Institute of Biomolecular Chemistry, CNR, 07100 Sassari, Italy, Department of Surgical, Microsurgical and Medical Sciences, University of Sassari, 07100 Sassari, Italy, Oncology Unit, Local Health Unit (ASL1), 07100 Sassari, Italy, Oncology Unit, Civil Hospital, 07041 Alghero, Italy, Department of Medical Oncology, University of Cagliari, 09042 Cagliari, Italy, Oncology Unit, Local Health Unit (ASL2), 07026 Olbia, Italy, Oncology Unit, Zonchello Hospital, 08100 Nuoro, Italy, Oncology Unit, Businco Hospital, 09121 Cagliari, Italy, Oncology Unit, Local Health Unit (ASL), 09170 Oristano, Italy, Department of Medical Oncology, Hospital University (AOU), 07100 Sassari, Italy, Oncology Unit, Local Health Unit (ASL4), 08045 Lanusei, Italy, Oncology Unit, Local Health Unit (ASL7), 09013 Carbonia‑Iglesias, Italy
    Copyright: © Palomba et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1415-1421
    |
    Published online on: June 29, 2016
       https://doi.org/10.3892/ol.2016.4798
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Abstract

The presence of mutations in the KRAS gene is a predictor of a poor clinical response to EGFR-targeted agents in patients affected by colorectal cancer (CRC), but its significance as a global prognostic factor remains unclear. The aim of the present study was to evaluate the impact of the KRAS mutational status on time to first metastasis (TTM) and overall survival (OS) in a cohort of Sardinian CRC patients. A total of 551 patients with metastatic CRC at the time of enrolment were included. Clinical and pathological features of the disease, including follow‑up information, were obtained from medical records and cancer registry data. For mutational analysis formalin‑fixed paraffin‑embedded tissue samples were processed using a standard protocol. The coding sequence and splice junctions of exons 2 and 3 of the KRAS gene were screened for mutations by direct automated sequencing. Overall, 186 KRAS mutations were detected in 183/551 (33%) patients: 125 (67%) were located in codon 12, 36 (19%) in codon 13, and 18 (10%) in codon 61. The remaining mutations (7; 4%) were detected in uncommonly‑affected codons. No significant correlation between KRAS mutations and gender, age, anatomical location and stage of the disease at the time of diagnosis was identified. Furthermore, no prognostic value of KRAS mutations was found considering either TTM or OS. When patients were stratified by KRAS mutational status and gender, males were significantly associated with a longer TTM. The results of the present study indicate that KRAS mutation correlated with a slower metastatic progression in males with CRC from Sardinia, irrespective of the age at diagnosis and the codon of the mutation.
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Copy and paste a formatted citation
Spandidos Publications style
Palomba G, Cossu A, Paliogiannis P, Pazzola A, Baldino G, Scartozzi M, Ionta MT, Ortu S, Capelli F, Lanzillo A, Lanzillo A, et al: Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma. Oncol Lett 12: 1415-1421, 2016.
APA
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M. ... Palmieri, G. (2016). Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma. Oncology Letters, 12, 1415-1421. https://doi.org/10.3892/ol.2016.4798
MLA
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M., Ionta, M. T., Ortu, S., Capelli, F., Lanzillo, A., Sedda, T., Sanna, G., Barca, M., Virdis, L., Budroni, M., Palmieri, G."Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma". Oncology Letters 12.2 (2016): 1415-1421.
Chicago
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M., Ionta, M. T., Ortu, S., Capelli, F., Lanzillo, A., Sedda, T., Sanna, G., Barca, M., Virdis, L., Budroni, M., Palmieri, G."Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma". Oncology Letters 12, no. 2 (2016): 1415-1421. https://doi.org/10.3892/ol.2016.4798
Copy and paste a formatted citation
x
Spandidos Publications style
Palomba G, Cossu A, Paliogiannis P, Pazzola A, Baldino G, Scartozzi M, Ionta MT, Ortu S, Capelli F, Lanzillo A, Lanzillo A, et al: Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma. Oncol Lett 12: 1415-1421, 2016.
APA
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M. ... Palmieri, G. (2016). Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma. Oncology Letters, 12, 1415-1421. https://doi.org/10.3892/ol.2016.4798
MLA
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M., Ionta, M. T., Ortu, S., Capelli, F., Lanzillo, A., Sedda, T., Sanna, G., Barca, M., Virdis, L., Budroni, M., Palmieri, G."Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma". Oncology Letters 12.2 (2016): 1415-1421.
Chicago
Palomba, G., Cossu, A., Paliogiannis, P., Pazzola, A., Baldino, G., Scartozzi, M., Ionta, M. T., Ortu, S., Capelli, F., Lanzillo, A., Sedda, T., Sanna, G., Barca, M., Virdis, L., Budroni, M., Palmieri, G."Prognostic role of KRAS mutations in Sardinian patients with colorectal carcinoma". Oncology Letters 12, no. 2 (2016): 1415-1421. https://doi.org/10.3892/ol.2016.4798
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