Prognostic impact of the expression of Hedgehog proteins in cervical carcinoma FIGO stages I-IV treated with radiotherapy or chemoradiotherapy.

Abstract

OBJECTIVE:

Hedgehog signaling proteins were assessed in patients with cervical carcinoma receiving chemoradiation. Associations between five Hedgehog proteins and prognosis were studied.

METHODS:

In all, 131 cases of cervical carcinomas (FIGO stages I-IV) were immunohistochemically (IHC) analyzed for Patched (PTCH), Smoothened (SMO), and GLI1, GLI2 and GLI3 protein expression. Associations between Hedgehog protein expressions, clinicopathological factors, and clinical outcome data were examined.

RESULTS:

Positive IHC staining for the five Hedgehog proteins was recorded in 8% to 37% of the tumor cells. The highest frequency was noted for SMO and the lowest for GLI1. There was a significant association between low SMO- and GLI2-expression and KRAS-mutation. Tumors with overexpressed SMO had a higher frequency of residual tumor or local recurrences than tumors with low SMO expression. Patients with tumors expressing PTCH in more than 75% of the cells had significantly (P=0.023) better recurrence-free survival than patients with tumors with low expression. The opposite situation was true for SMO. For GLI2, there was a statistically significant difference with regard to overall (P=0.004) and distant (P=0.015) relapse rate for groups with expression of GLI2 in the range of 5-25% compared to higher rates.

CONCLUSIONS:

A predictive and prognostic value was found for PTCH, SMO, and GLI2 with regard to residual carcinoma, local recurrences, and for GLI2 distant relapses. The Hedgehog signaling pathway also seems to play an important role in cervical carcinogenesis together with HPV16-infection and KRAS-mutation.

• Authors: Louise Bohr Mordhorst, Cecilia Ahlin, Bengt Sorbe
• Journal: Gynecologic oncology (Gynecol Oncol) Vol. 135 Issue 2 Pg. 305-11 (Nov 2014) ISSN: 1095-6859 [Electronic] United States
• PMID: 25158038 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2013 Elsevier Inc. All rights reserved.

Chemical References

• Biomarkers, Tumor
• GLI1 protein, human
• GLI2 protein, human
• GLI3 protein, human
• Hedgehog Proteins
• Kruppel-Like Transcription Factors
• Nerve Tissue Proteins
• Nuclear Proteins
• PTCH1 protein, human
• Patched Receptors
• Patched-1 Receptor
• Receptors, Cell Surface
• Receptors, G-Protein-Coupled
• SMO protein, human
• Smoothened Receptor
• Transcription Factors
• Zinc Finger Protein GLI1
• Zinc Finger Protein Gli2
• Zinc Finger Protein Gli3

Topics

• Adenocarcinoma (metabolism, pathology, therapy)
• Adult
• Aged
• Aged, 80 and over
• Biomarkers, Tumor (metabolism)
• Carcinoma, Adenosquamous (metabolism, pathology, therapy)
• Carcinoma, Squamous Cell (metabolism, pathology, therapy)
• Chemoradiotherapy
• Female
• Hedgehog Proteins (metabolism)
• Humans
• Immunohistochemistry
• Kruppel-Like Transcription Factors (metabolism)
• Middle Aged
• Neoplasm Staging
• Nerve Tissue Proteins (metabolism)
• Nuclear Proteins (metabolism)
• Patched Receptors
• Patched-1 Receptor
• Receptors, Cell Surface (metabolism)
• Receptors, G-Protein-Coupled (metabolism)
• Smoothened Receptor
• Transcription Factors (metabolism)
• Uterine Cervical Neoplasms (metabolism, pathology, therapy)
• Zinc Finger Protein GLI1
• Zinc Finger Protein Gli2
• Zinc Finger Protein Gli3