eISSN: 2084-9869
ISSN: 1233-9687
Polish Journal of Pathology
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SCImago Journal & Country Rank
4/2021
vol. 72
 
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abstract:
Original paper

EGFR/PI3K/Akt/mTOR pathway in head and neck squamous cell carcinoma patients with different HPV status

Anna Janecka-Widła
1
,
Kaja Majchrzyk
2
,
Anna Mucha-Małecka
2
,
Beata Biesaga
3

1.
Department of Tumor Pathology, Maria Sklodowska-Curie National Research Institute of Oncology, Krakow Branch, Poland
2.
Department of Radiotherapy, Maria Sklodowska-Curie National Research Institute of Oncology, Krakow Branch, Poland
3.
Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie National Research Institute of Oncology, Gliwice Branch, Poland
Pol J Pathol 2021; 73 (4): 296-314
Online publish date: 2022/02/07
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The aim of the study was to compare prognostic potential of PIK3CA mutations and expression of proteins involved in or regulate EGFR/PI3K/Akt/mTOR signaling in HPV16 positive and HPV negative head and neck squamous cell carcinoma (HNSCC) patients.

The expression of proteins (EGFR, Akt, pAkt(Ser473), pAkt(Thr308), mTOR, PTEN, pPTEN, APOBEC3B) were assessed immunohistochemically and PIK3CA mutations (p.E542K, p.E545K, p.H1047R) by qPCR.

Significantly more HPV16 positive tumors (89.29%) with low EGFR expression were found as compared to HPV negative ones (58.82%). PIK3CA mutations were detected in 7.14% of HPV16 positive and 2.5% of HPV negative cancers. In HPV16 positive patients survival analysis has shown that positive prognostic potential for disease free survival (DFS) had low expression of APOBEC3B. In HPV negative patients prognostic significance for DFS had APOBEC3B, Akt and

pAkt(Thr308) levels, and for overall survival (OS) – pAkt(Thr308) only. Independent favorable prognostic factors in the whole group of patients were: low

T stage, low pAkt(Thr308) expression, active HPV16 infection (for OS and DFS) and female gender (for OS).

Obtained results suggest the existence of significant differences in expression and prognostic potential of proteins involved in EGFR/PI3K/Akt/mTOR signaling between HPV16 positive and HPV negative HNSCC patients.
keywords:

HNSCC, active HPV infection, EGFR/PI3K/Akt/mTOR pathway, survival

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