Erschienen in:
26.10.2018 | Head & Neck
Abnormal activation of the Akt signaling pathway in adenoid cystic carcinoma
verfasst von:
Karla Flaviana Carneiro Castelo Branco, Andre Luis Ribeiro Ribeiro, Raíssa Pinheiro de Mendonça, João de Jesus Viana Pinheiro, Maria Sueli da Silva Kataoka, Maria Vanda Catão Arnaud, Sérgio de Melo Alves Junior
Erschienen in:
European Archives of Oto-Rhino-Laryngology
|
Ausgabe 12/2018
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Abstract
Purpose
Adenoid cystic carcinoma (ACC) is an intriguing lesion because it shows a slow growth in the beginning, but a late poor prognosis due to perineural invasion, metastasis and recurrence. This study aimed to investigate whether Akt signaling would be deregulated in adenoid cystic carcinoma and its consequence in the expression of associated proteins.
Methods
The expression of the Akt, p-Akt, NFκB, β-catenin, cyclin D1 and COX-2 was assessed by immunohistochemistry in 10 cases of ACC, 17 cases of pleomorphic adenoma (PA), and 7 cases of normal salivary gland (NSG).
Results
p-Akt was overexpressed in ACC when compared to NSG. NFκB, β-catenin, and COX-2 were overexpressed in ACC and PA when compared to NSG. Most proteins were slightly higher expressed in ACC than in PA, but they never reached significance. p-Akt expression positively correlated with NFκB, β-catenin, cyclin D1 and COX-2 in ACC and PA, while this correlation trended to be negative in for these proteins (except for NFκB) in NSG using Person’s correlation analysis, but without reaching significance.
Conclusions
Our results indicate an abnormal activation of Akt signaling pathway, which can be an important regulator of tumor biology in ACC. Activated Akt correlated with the expression of NFκB, β-catenin and COX-2, which can potentially influence cell survival in ACC.