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Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas
BACKGROUND: The aim of the study was to assess the localization of Polysialic acid (polySia) and Neural cell adhesion molecule (NCAM) in grade I–IV astrocytomas by confocal microscopy, and also to clarify and compare their relationship to conventional clinicopathological features in these tumors. ME...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4161890/ https://www.ncbi.nlm.nih.gov/pubmed/25164322 http://dx.doi.org/10.1186/1471-2407-14-623 |
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author | Mäkelä, Katri Nordfors, Kristiina Finne, Jukka Jokilammi, Anne Paavonen, Timo Haapasalo, Hannu Korja, Miikka Haapasalo, Joonas |
author_facet | Mäkelä, Katri Nordfors, Kristiina Finne, Jukka Jokilammi, Anne Paavonen, Timo Haapasalo, Hannu Korja, Miikka Haapasalo, Joonas |
author_sort | Mäkelä, Katri |
collection | PubMed |
description | BACKGROUND: The aim of the study was to assess the localization of Polysialic acid (polySia) and Neural cell adhesion molecule (NCAM) in grade I–IV astrocytomas by confocal microscopy, and also to clarify and compare their relationship to conventional clinicopathological features in these tumors. METHODS: Study material was stained immunohistochemically for polySia, NCAM and IDH1-R132H point mutation. Confocal microscopy of polySia and NCAM staining was performed on tissue micro-array samples (TMA) of 242 diffusely infiltrating astrocytomas (grade II: 28; grade III: 33; grade IV: 181) and 82 pilocytic astrocytomas. The results were statistically correlated to clinicopathological factors and survival data. RESULTS: PolySia was observed in 45 cases (19%) and NCAM positivity in 92 cases (38%). All 45 tumors with polySia positivity were also positive for NCAM whereas there were 47 tumors which contained positive staining for NCAM but not for polySia. The simultaneous expression was concomitant and colocalized suggesting polysialyated NCAM (polySia-NCAM). PolySia expression was significantly stronger in IDH1 mutated tumors than in IDH1 non-mutated (p = 0.001, chi-square test). There were no significant differences in polySia-NCAM between primary tumors or recurrences (p = n.s., chi-square test). PolySia positivity was associated with longer patient survival in relation to total tumor material (p = 0.020, log-rank test). Furthermore, when only glioblastomas were assessed, patients with positive polySia had significantly better prognosis (p = 0.006, log-rank test). In multivariate survival analysis, polySia was found to be an independent prognostic factor. PolySia was nearly absent in grade I pilocytic astrocytomas (1 immunopositive tumor of 82). CONCLUSIONS: Expression of polySia is common in adult grade II–IV astrocytomas, whereas it is nearly absent in pediatric grade I pilocytic astrocytomas. PolySia positivity is associated with longer survival rates in patients with a grade II–IV astrocytomas and also grade IV glioblastomas assessed separately. The results of this study suggest that IDH1 mutation may be associated with polySia expression pathways in malignant gliomas. |
format | Online Article Text |
id | pubmed-4161890 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-41618902014-09-13 Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas Mäkelä, Katri Nordfors, Kristiina Finne, Jukka Jokilammi, Anne Paavonen, Timo Haapasalo, Hannu Korja, Miikka Haapasalo, Joonas BMC Cancer Research Article BACKGROUND: The aim of the study was to assess the localization of Polysialic acid (polySia) and Neural cell adhesion molecule (NCAM) in grade I–IV astrocytomas by confocal microscopy, and also to clarify and compare their relationship to conventional clinicopathological features in these tumors. METHODS: Study material was stained immunohistochemically for polySia, NCAM and IDH1-R132H point mutation. Confocal microscopy of polySia and NCAM staining was performed on tissue micro-array samples (TMA) of 242 diffusely infiltrating astrocytomas (grade II: 28; grade III: 33; grade IV: 181) and 82 pilocytic astrocytomas. The results were statistically correlated to clinicopathological factors and survival data. RESULTS: PolySia was observed in 45 cases (19%) and NCAM positivity in 92 cases (38%). All 45 tumors with polySia positivity were also positive for NCAM whereas there were 47 tumors which contained positive staining for NCAM but not for polySia. The simultaneous expression was concomitant and colocalized suggesting polysialyated NCAM (polySia-NCAM). PolySia expression was significantly stronger in IDH1 mutated tumors than in IDH1 non-mutated (p = 0.001, chi-square test). There were no significant differences in polySia-NCAM between primary tumors or recurrences (p = n.s., chi-square test). PolySia positivity was associated with longer patient survival in relation to total tumor material (p = 0.020, log-rank test). Furthermore, when only glioblastomas were assessed, patients with positive polySia had significantly better prognosis (p = 0.006, log-rank test). In multivariate survival analysis, polySia was found to be an independent prognostic factor. PolySia was nearly absent in grade I pilocytic astrocytomas (1 immunopositive tumor of 82). CONCLUSIONS: Expression of polySia is common in adult grade II–IV astrocytomas, whereas it is nearly absent in pediatric grade I pilocytic astrocytomas. PolySia positivity is associated with longer survival rates in patients with a grade II–IV astrocytomas and also grade IV glioblastomas assessed separately. The results of this study suggest that IDH1 mutation may be associated with polySia expression pathways in malignant gliomas. BioMed Central 2014-08-28 /pmc/articles/PMC4161890/ /pubmed/25164322 http://dx.doi.org/10.1186/1471-2407-14-623 Text en © Mäkelä et al.; licensee BioMed Central Ltd. 2014 This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Mäkelä, Katri Nordfors, Kristiina Finne, Jukka Jokilammi, Anne Paavonen, Timo Haapasalo, Hannu Korja, Miikka Haapasalo, Joonas Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title | Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title_full | Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title_fullStr | Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title_full_unstemmed | Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title_short | Polysialic acid is associated with better prognosis and IDH1-mutation in diffusely infiltrating astrocytomas |
title_sort | polysialic acid is associated with better prognosis and idh1-mutation in diffusely infiltrating astrocytomas |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4161890/ https://www.ncbi.nlm.nih.gov/pubmed/25164322 http://dx.doi.org/10.1186/1471-2407-14-623 |
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