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Article

Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors

  • Authors:
    • Greta Alì
    • Laura Boldrini
    • Alessandra Capodanno
    • Serena Pelliccioni
    • Adele Servadio
    • Giuliana Crisman
    • Alessandro Picchi
    • Federico Davini
    • Alfredo Mussi
    • Gabriella Fontanini
  • View Affiliations / Copyright

    Affiliations: Department of Surgery, Division of Pathological Anatomy, University of Pisa, Pisa 56126, Italy, Laboratory Medicine and Molecular Diagnostics, University of Pisa, Pisa 56126, Italy, Department of Health Sciences, University of L'Aquila, L'Aquila 67010, Italy, Department of Cardio-Thoracic Surgery, Division of Thoracic Surgery, University of Pisa, Pisa 56124, Italy
  • Pages: 787-792
    |
    Published online on: June 20, 2011
       https://doi.org/10.3892/etm.2011.291
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Abstract

Bronchopulmonary neuroendocrine tumors (BP-NETs) are separated into four subgroups: typical carcinoid tumor (TC), atypical carcinoid tumor (AC), large-cell neuroendocrine carcinoma (LCNEC) and small-cell lung carcinoma (SCLC). The signaling pathway involving AKT/mammalian target of rapamycin (mTOR) is crucial to the regulation of cell growth, proliferation and survival, and is frequently activated in human cancers. Consequently, mTOR is considered an attractive target for anticancer agents. The present study aimed to evaluate the expression of phosphorylated AKT and mTOR in a series of BP-NETs, and to analyze the correlations with clinicopathological parameters. p-AKT and p-mTOR levels were determined by immunohistochemistry in a series of 210 BP-NETs, including 85 SCLCs, 17 LCNECs, 26 ACs, 75 TCs and 7 tumorlets. Higher p-AKT and p-mTOR expression levels were identified in the majority of tumorlets and carcinoids in comparison to the LCNECs (P=0.0001) and SCLCs (P=0.0002). Furthermore, a significant association was observed between p-mTOR expression and tumor size (T) in SCLCs (P=0.04) and LCNECs (P=0.03): T3-T4 tumors exhibited significantly lower p-mTOR expression compared to T1-T2 tumors. In conclusion, most of the BP-NETs examined in this study expressed p-AKT and p-mTOR, suggesting that the AKT/mTOR pathway plays an important role in these tumors. Additionally, our results confirm that low- to intermediate-grade tumors are more closely associated to each other than to high-grade tumors, despite sharing common classification and a common origin from neuroendocrine cells. These findings improve our knowledge of the biological characterization of these tumors and indicate new therapeutic opportunities for the treatment of BP-NETs.
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Copy and paste a formatted citation
Spandidos Publications style
Alì G, Boldrini L, Capodanno A, Pelliccioni S, Servadio A, Crisman G, Picchi A, Davini F, Mussi A, Fontanini G, Fontanini G, et al: Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors. Exp Ther Med 2: 787-792, 2011.
APA
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G. ... Fontanini, G. (2011). Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors. Experimental and Therapeutic Medicine, 2, 787-792. https://doi.org/10.3892/etm.2011.291
MLA
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G., Picchi, A., Davini, F., Mussi, A., Fontanini, G."Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors". Experimental and Therapeutic Medicine 2.5 (2011): 787-792.
Chicago
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G., Picchi, A., Davini, F., Mussi, A., Fontanini, G."Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors". Experimental and Therapeutic Medicine 2, no. 5 (2011): 787-792. https://doi.org/10.3892/etm.2011.291
Copy and paste a formatted citation
x
Spandidos Publications style
Alì G, Boldrini L, Capodanno A, Pelliccioni S, Servadio A, Crisman G, Picchi A, Davini F, Mussi A, Fontanini G, Fontanini G, et al: Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors. Exp Ther Med 2: 787-792, 2011.
APA
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G. ... Fontanini, G. (2011). Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors. Experimental and Therapeutic Medicine, 2, 787-792. https://doi.org/10.3892/etm.2011.291
MLA
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G., Picchi, A., Davini, F., Mussi, A., Fontanini, G."Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors". Experimental and Therapeutic Medicine 2.5 (2011): 787-792.
Chicago
Alì, G., Boldrini, L., Capodanno, A., Pelliccioni, S., Servadio, A., Crisman, G., Picchi, A., Davini, F., Mussi, A., Fontanini, G."Expression of p-AKT and p-mTOR in a large series of bronchopulmonary neuroendocrine tumors". Experimental and Therapeutic Medicine 2, no. 5 (2011): 787-792. https://doi.org/10.3892/etm.2011.291
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