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PLoS One. 2017 Aug 25;12(8):e0183816. doi: 10.1371/journal.pone.0183816. eCollection 2017.

Expression of LRIG proteins as possible prognostic factors in primary vaginal carcinoma.

Author information

1
Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
2
Region Västmanland - Uppsala University, Centre for Clinical Research, Hospital of Västmanland Västerås, Västerås, Sweden.
3
School of Health and Medical Sciences, Örebro University, Örebro, Sweden.
4
Department of Laboratory Medicine, Örebro University Hospital, Örebro, Sweden.
5
Department of Radiation Sciences, Umeå University, Umeå, Sweden.
6
Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
7
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
8
Department of Oncology, Örebro University Hospital, Örebro, Sweden.
9
Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.

Abstract

BACKGROUND:

Primary vaginal carcinoma (PVC) is a rare malignancy. Established prognostic factors include tumour stage and age at diagnosis. The leucine-rich repeats and immunoglobuline-like domains (LRIG)-1 protein functions as a tumour suppressor, but less is known about the functions of LRIG2 and LRIG3. The present study aimed to evaluate the expression of LRIG proteins and analyse their possible associations with clinical characteristics and survival in a cohort of PVC patients.

METHODS:

We used immunohistochemistry to investigate LRIG1, LRIG2, and LRIG3 expression in tumour samples from a consecutive cohort of 70 PVC patients. The association between LRIG protein expression and clinical characteristics and cancer-specific survival was investigated using univariate and multivariate analyses.

RESULTS:

The majority of PVC patients (72%) had >50% LRIG1- and LRIG2-positive cells, and no or low LRIG3-positive cells. HPV status was significantly correlated with LRIG1 expression (p = 0.0047). Having high LRIG1 expression was significantly correlated with superior cancer-specific survival in univariate and multivariate analyses. LRIG2 and LRIG3 expression did not significantly correlate with clinical characteristics or survival.

CONCLUSION:

LRIG1 expression might be of interest as a prognostic marker in PVC patients, whereas the role of LRIG2 and LRIG3 expression remains to be clarified.

PMID:
28841699
PMCID:
PMC5571912
DOI:
10.1371/journal.pone.0183816
[Indexed for MEDLINE]
Free PMC Article

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