ArticleCell proliferation2007
Progression of astrocytomas and meningiomas: an evaluation in vitro.
Article in Cell proliferation, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed, 10 citations in OpenAlex.
- hTERT Transduction Extends the Lifespan of Primary Pediatric Low-Grade Glioma Cells While Preserving the Biological Response to NGF.Pathology oncology research : POR · 2021Article
- hTERT promoter methylation in meningiomas and central nervous hemangiopericytomas.Journal of neuro-oncology · 2016Article
- The accuracy of survival time prediction for patients with glioma is improved by measuring mitotic spindle checkpoint gene expression.PloS one · 2011Article
- Prognostic molecular markers with no impact on decision-making: the paradox of gliomas based on a prospective study.British journal of cancer · 2008Article
- Immunohistochemical expression of h-telomerase reverse transcriptase in canine and feline meningiomas.Journal of veterinary science · 2007Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
OBJECTIVES/
backgroundIn biological terms, progression means that malignancy increases as genetic mutations accumulate leading to increased proliferation and invasion capacity. By verifying the proliferation capacity, human telomerase reverse transcriptase (hTERT) expression and in vitro invasion, in a group of highly malignant glioblastomas, benign meningiomas and astrocytomas, at the initial stage of progression, we have analysed putative progression in vitro for proliferation and telomerase expression. MATERIALS AND
methodsThe relative proliferation status (visualized with Ki-67 antibodies) and presence of hTERT protein was analysed in 27 intracranial tumours (6 astrocytomas, 8 glioblastomas and 13 meningiomas) by immunohistochemistry on paraffin-embedded biopsy tissue, as well as on primary tumour-derived cell cultures. A confrontation model was used to analyse invasiveness in vitro.
resultsThe mean proliferation indices were 22.3 (SD = 18.1) for glioblastomas and 2.1 (SD = 1.9) for low-grade (LG) astrocytomas. The group of benign meningiomas had a labelling index of 2.2 (SD = 2.7). Mean percentages of staining for hTERT varied between 36.5 (SD = 28.4) for glioblastomas and 10.2 (SD = 8.6) for LG astrocytomas. The group of benign meningiomas had a labelling index of 12.4 (SD = 19.2) for hTERT. A significant difference was seen for Ki-67 (P < 0.05) and hTERT (P < 0.001) in vivo versus in vitro. No difference was seen between the group of invasive and non-invasive tumour-derived cell cultures for the histopathological markers Ki-67 and hTERT (P > 0.05) in vitro.
conclusionsThe elevated expression of hTERT and Ki-67 in vitro provides a potential prognostic tool for early detection of the progression of brain tumours. As tumour cells require telomerase for continued proliferation, the expression of hTERT may mark immortality, leading to indefinite life span. On the other hand, hTERT expression and cell proliferation are not linked directly to invasion in vitro.
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