eISSN: 2084-9869
ISSN: 1233-9687
Polish Journal of Pathology
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SCImago Journal & Country Rank
1/2022
vol. 73
 
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abstract:
Original paper

Nanog expression in patients with squamous cell carcinoma of oropharynx in relation to immunohistochemical score

Marta Kołodziej-Rzepa
1
,
Beata Biesaga
2
,
Dorota Słonina
3
,
Anna Mucha-Małecka
4

1.
Department of General, Oncological and Vascular Surgery, 5th Military Clinical Hospital in Krakow, Poland
2.
Department of Tumour Pathology, Maria Skłodowska-Curie National Research Institute of Oncology, Krakow Branch, Poland
3.
Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Poland
4.
Department of Radiotherapy, Maria Skłodowska-Curie National Research Institute of Oncology, Krakow Branch, Poland
Pol J Pathol 2022; 74 (1): 60-71
Online publish date: 2022/06/29
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This study aimed to compare prognostic potential of Nanog expression analysed by three immunohistochemical scores in the group of 63 squamous cell carcinomas of oropharynx. Immunoreactivity of Nanog expression was analyzed by semiquantitative score, immunoreactive score and H-score. For all three scores, the cut-off points for Nanog overexpression and its lack, allowing for optimal separation of overall and disease free survival curves, were search by minimal p-value method. In semiquantitative score, the best separation of overall and disease free survival curves was obtain by cut-off point lack of staining vs. week/moderate/strong staining, although statistical significance was not reach (OS: HR = 1.016, p = 0.081, DFS: HR = 6.876, p = 0.061). The cut-off points for immunoreactive score and H-score were, respectively: 1 (OS: HR = 6.977, p = 0.014, DFS: HR = 6.002, p = 0.019) and 50 (OS: HR = 6.977, p = 0.014, DFS: HR = 6.002, p = 0.019). The cut-off points found for these two scores allow to identify the same subgroups of patients with lack of Nanog expression (11.1%) and its overexpression (88.9%). All patients with tumors characterized by lack of Nanog overexpression identifying by immunoreactive score and H-score survived 5 years without evidence of cancer progression. In multivariate analysis Nanog immunoreactivity analysed by QRS and IRS was independent prognostic factor for OS (HR = 10.195, p = 0.024). Immunohistochemical score using to distinguish Nanog overexpression or its lack has influence on prognostic potential of this biomarker.
keywords:

oropharynx cancers, Nanog expression, immunohistochemical score, HPV infection, prognosis

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