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Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome

  • Authors:
    • Radmila Lemstrova
    • Veronika Brynychova
    • David J. Hughes
    • Viktor Hlavac
    • Pavel Dvorak
    • Joanne E. Doherty
    • Helena A. Murray
    • Martin Crockard
    • Martin Oliverius
    • Jan Hlavsa
    • Eva Honsova
    • Jan Mazanec
    • Zdenek Kala
    • Martin Lovecek
    • Roman Havlik
    • Jiri Ehrmann
    • Ondrej Strouhal
    • Pavel Soucek
    • Bohuslav Melichar
    • Beatrice Mohelnikova-Duchonova
  • View Affiliations / Copyright

    Affiliations: Department of Oncology, Faculty of Medicine and Dentistry, Palacky University Olomouc and University Hospital Olomouc, 771 47 Olomouc, Czech Republic, Department of Toxicogenomics, National Institute of Public Health, 100 42 Prague, Czech Republic, Department of Physiology and Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin 2, Republic of Ireland, Department of Biology, Faculty of Medicine in Pilsen, Charles University 32300 Pilsen, Czech Republic, Randox Laboratories Ltd., Crumlin, BT29 4QY, Northern Ireland, Department of Transplantation Surgery, Institute of Clinical and Experimental Medicine, 140 21 Prague, Czech Republic, Department of Surgery, University Hospital and Medical Faculty, Masaryk University, 625 00 Brno, Czech Republic, Department of Clinical and Transplantation Pathology, Institute of Clinical and Experimental Medicine, 140 21 Prague, Czech Republic, Department of Pathology, University Hospital and Medical Faculty, Masaryk University, 625 00 Brno, Czech Republic, Department of Surgery I, Faculty of Medicine and Dentistry, Palacky University Olomouc and University Hospital Olomouc, 771 47 Olomouc, Czech Republic, Department of Clinical and Molecular Pathology and Laboratory of Molecular Pathology, Faculty of Medicine and Dentistry, Palacky University, 771 47 Olomouc, Czech Republic
    Copyright: © Lemstrova et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 5980-5988
    |
    Published online on: September 14, 2017
       https://doi.org/10.3892/ol.2017.6946
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Abstract

Pancreatic ductal adenocarcinoma (PDAC) is a tumor with a poor prognosis, and no targeted therapy is curre­ntly available. The aim of the present study was to investigate the prognostic significance of the expression of V‑Ki‑ras2 Κirsten rat sarcoma viral oncogene homolog (KRAS), downstream signaling pathway genes and the association with clinical characteristics in PDAC patients undergoing radical surgery. Tumors and adjacent non‑neoplastic pancreatic tissues were examined in 45 patients with histologically verified PDAC. KRAS and B‑Raf proto‑oncogene, serine/threonine kinase (BRAF) gene mutation analysis was performed using the KRAS/BRAF/phosphatidylinositol‑4,5‑bisphosphate 3‑kinase catalytic subunit α array. The transcript profile of 52 KRAS downstream signaling pathway genes was assessed using quantitative‑polymerase chain reaction. KRAS mutation was detected in 80% of cases. The genes of four signaling pathways downstream of KRAS, including the phosphoinositide 3‑kinase/3‑phosphoinositide‑dependent protein kinase 1/V‑akt murine thymoma viral oncogene homolog 1, RAL guanine nucleotide exchange factor, Ras and Rab interactor 1/ABL proto‑oncogene‑1, non‑receptor tyrosine kinase, and RAF proto‑oncogene serine/threonine‑protein kinase/mitogen‑activated protein kinase pathways, exhibited differential expression in PDAC compared with that in the adjacent normal tissues. However, no significant differences in expression were evident between patients with KRAS‑mutated and wild‑type tumors. The expression of KRAS downstream signaling pathways genes did not correlate with angioinvasion, perineural invasion, grade or presence of lymph node metastasis. Additionally, the presence of KRAS mutations was not associated with overall survival. Among the KRAS downstream effective signaling pathways molecules investigated, only v‑raf‑1 murine leukemia viral oncogene homolog 1 expression was predictive of prognosis. Overall, KRAS mutation is present in the majority of cases of PDAC, but is not associated with changes in the expression of KRAS downstream signaling pathways and the clinical outcome. This may partly explain the failure of KRAS‑targeted therapies in PDAC.
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Copy and paste a formatted citation
Spandidos Publications style
Lemstrova R, Brynychova V, Hughes DJ, Hlavac V, Dvorak P, Doherty JE, Murray HA, Crockard M, Oliverius M, Hlavsa J, Hlavsa J, et al: Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome. Oncol Lett 14: 5980-5988, 2017.
APA
Lemstrova, R., Brynychova, V., Hughes, D.J., Hlavac, V., Dvorak, P., Doherty, J.E. ... Mohelnikova-Duchonova, B. (2017). Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome. Oncology Letters, 14, 5980-5988. https://doi.org/10.3892/ol.2017.6946
MLA
Lemstrova, R., Brynychova, V., Hughes, D. J., Hlavac, V., Dvorak, P., Doherty, J. E., Murray, H. A., Crockard, M., Oliverius, M., Hlavsa, J., Honsova, E., Mazanec, J., Kala, Z., Lovecek, M., Havlik, R., Ehrmann, J., Strouhal, O., Soucek, P., Melichar, B., Mohelnikova-Duchonova, B."Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome". Oncology Letters 14.5 (2017): 5980-5988.
Chicago
Lemstrova, R., Brynychova, V., Hughes, D. J., Hlavac, V., Dvorak, P., Doherty, J. E., Murray, H. A., Crockard, M., Oliverius, M., Hlavsa, J., Honsova, E., Mazanec, J., Kala, Z., Lovecek, M., Havlik, R., Ehrmann, J., Strouhal, O., Soucek, P., Melichar, B., Mohelnikova-Duchonova, B."Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome". Oncology Letters 14, no. 5 (2017): 5980-5988. https://doi.org/10.3892/ol.2017.6946
Copy and paste a formatted citation
x
Spandidos Publications style
Lemstrova R, Brynychova V, Hughes DJ, Hlavac V, Dvorak P, Doherty JE, Murray HA, Crockard M, Oliverius M, Hlavsa J, Hlavsa J, et al: Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome. Oncol Lett 14: 5980-5988, 2017.
APA
Lemstrova, R., Brynychova, V., Hughes, D.J., Hlavac, V., Dvorak, P., Doherty, J.E. ... Mohelnikova-Duchonova, B. (2017). Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome. Oncology Letters, 14, 5980-5988. https://doi.org/10.3892/ol.2017.6946
MLA
Lemstrova, R., Brynychova, V., Hughes, D. J., Hlavac, V., Dvorak, P., Doherty, J. E., Murray, H. A., Crockard, M., Oliverius, M., Hlavsa, J., Honsova, E., Mazanec, J., Kala, Z., Lovecek, M., Havlik, R., Ehrmann, J., Strouhal, O., Soucek, P., Melichar, B., Mohelnikova-Duchonova, B."Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome". Oncology Letters 14.5 (2017): 5980-5988.
Chicago
Lemstrova, R., Brynychova, V., Hughes, D. J., Hlavac, V., Dvorak, P., Doherty, J. E., Murray, H. A., Crockard, M., Oliverius, M., Hlavsa, J., Honsova, E., Mazanec, J., Kala, Z., Lovecek, M., Havlik, R., Ehrmann, J., Strouhal, O., Soucek, P., Melichar, B., Mohelnikova-Duchonova, B."Dysregulation of KRAS signaling in pancreatic cancer is not associated with KRAS mutations and outcome". Oncology Letters 14, no. 5 (2017): 5980-5988. https://doi.org/10.3892/ol.2017.6946
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