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Article

A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features

  • Authors:
    • Eleni Andriana Trigka
    • Georgia Levidou
    • Angelica A. Saetta
    • Ilenia Chatziandreou
    • Periklis Tomos
    • Nikolaos Thalassinos
    • Nikolaos Anastasiou
    • Eleftherios Spartalis
    • Nikolaos Kavantzas
    • Efstratios Patsouris
    • Penelope Korkolopoulou
  • View Affiliations / Copyright

    Affiliations: First Department of Pathology, University of Athens Medical School, Laiko General Hospital, 11527 Athens, Greece, Second Department of Propaedeutic Surgery, University of Athens Medical School, Laiko General Hospital, 11527 Athens, Greece, Department of Thoracic Surgery, 1st IKA Hospital, 15127 Athens, Greece
  • Pages: 623-636
    |
    Published online on: May 31, 2013
       https://doi.org/10.3892/or.2013.2512
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Abstract

The phosphoinositide 3-kinase (PI3K)/v-akt murine thymoma viral oncogene homolog (AKT)/mammalian target of rapamycin (mTOR) pathway is upregulated in a number of human cancers, including non-small cell lung cancer (NSCLC). Its potential role in NSCLC progression provides an attractive target for anticancer therapy. The expression of phosphorylated mTOR (p-mTOR), phosphorylated AKT (p-AKT), p85α and p110γ subunits of PI3K, phosphorylated p70S6K (p-p70S6K), phosphatase and tensin homolog (PTEN) and phosphorylated 4E-BP1 (p‑4E‑BP1) was examined by immunohistochemistry in 102 NSCLC specimens. The results were correlated with clinicopathological features. We also examined 61 of our cases for the presence of PIK3CA, AKT1, PTEN and K-RAS mutations. A common PIK3CA mutation was detected at exon 9 in 2 samples (p.E545K), whereas another sample displayed a rare mutation (p.D1018N). Furthermore, 10 out of 54 cases (18.5%) had a K-RAS mutation at codon 12, 5 had a PTEN mutation (exons 7 and 8) and 1 case had an AKT1 mutation (p.E17K). PTEN mutations were associated with nodal metastases. The expression of p-mTOR positively correlated with that of p-AKT and p-p70S6K and was higher in adenocarcinomas along with nuclear p110γPI3K expression, whereas p-4E-BP1 expression was higher in squamous cell carcinomas. We also established a positive association between p85αPI3K or p110γPI3K and cytoplasmic p-AKT and its downstream effectors. An inverse correlation was noted between p-4E-BP1 immunoexpression and tumour status and nuclear p-AKT expression as regards tumour stage. Univariate survival analysis demonstrated that p-4E-BP1 expression, either alone or in combination with cytoplasmic p-AKT expression had an adverse prognostic significance in adenocarcinomas. The combination of p-4E‑BP1 and cytoplasmic p-AKT expression remained significant in the multivariate analysis as a function of their interaction with histological type. Our data demonstrate the significance of p‑4E‑BP1 immunoexpression as a molecular marker of prognostic value in adenocarcinomas, particularly when combined with p-AKT.
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Copy and paste a formatted citation
Spandidos Publications style
Trigka EA, Levidou G, Saetta AA, Chatziandreou I, Tomos P, Thalassinos N, Anastasiou N, Spartalis E, Kavantzas N, Patsouris E, Patsouris E, et al: A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features. Oncol Rep 30: 623-636, 2013.
APA
Trigka, E.A., Levidou, G., Saetta, A.A., Chatziandreou, I., Tomos, P., Thalassinos, N. ... Korkolopoulou, P. (2013). A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features. Oncology Reports, 30, 623-636. https://doi.org/10.3892/or.2013.2512
MLA
Trigka, E. A., Levidou, G., Saetta, A. A., Chatziandreou, I., Tomos, P., Thalassinos, N., Anastasiou, N., Spartalis, E., Kavantzas, N., Patsouris, E., Korkolopoulou, P."A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features". Oncology Reports 30.2 (2013): 623-636.
Chicago
Trigka, E. A., Levidou, G., Saetta, A. A., Chatziandreou, I., Tomos, P., Thalassinos, N., Anastasiou, N., Spartalis, E., Kavantzas, N., Patsouris, E., Korkolopoulou, P."A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features". Oncology Reports 30, no. 2 (2013): 623-636. https://doi.org/10.3892/or.2013.2512
Copy and paste a formatted citation
x
Spandidos Publications style
Trigka EA, Levidou G, Saetta AA, Chatziandreou I, Tomos P, Thalassinos N, Anastasiou N, Spartalis E, Kavantzas N, Patsouris E, Patsouris E, et al: A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features. Oncol Rep 30: 623-636, 2013.
APA
Trigka, E.A., Levidou, G., Saetta, A.A., Chatziandreou, I., Tomos, P., Thalassinos, N. ... Korkolopoulou, P. (2013). A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features. Oncology Reports, 30, 623-636. https://doi.org/10.3892/or.2013.2512
MLA
Trigka, E. A., Levidou, G., Saetta, A. A., Chatziandreou, I., Tomos, P., Thalassinos, N., Anastasiou, N., Spartalis, E., Kavantzas, N., Patsouris, E., Korkolopoulou, P."A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features". Oncology Reports 30.2 (2013): 623-636.
Chicago
Trigka, E. A., Levidou, G., Saetta, A. A., Chatziandreou, I., Tomos, P., Thalassinos, N., Anastasiou, N., Spartalis, E., Kavantzas, N., Patsouris, E., Korkolopoulou, P."A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features". Oncology Reports 30, no. 2 (2013): 623-636. https://doi.org/10.3892/or.2013.2512
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