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Erschienen in: Journal of Neuro-Oncology 1/2016

27.07.2016 | Laboratory Investigation

hTERT promoter methylation in meningiomas and central nervous hemangiopericytomas

verfasst von: Gina Fürtjes, Michaela Köchling, Susanne Peetz-Dienhart, Andrea Wagner, Katharina Heß, Martin Hasselblatt, Volker Senner, Walter Stummer, Werner Paulus, Benjamin Brokinkel

Erschienen in: Journal of Neuro-Oncology | Ausgabe 1/2016

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Abstract

In meningiomas, prognostic impact of mutations in the human telomerase reverse transcriptase (hTERT) promoter region was recently shown, while studies of promoter methylation and analyses of hemangiopericytomas are lacking. hTERT promoter methylation was analyzed in 78 meningioma and 38 meningeal hemangiopericytoma samples by methylation-specific polymerase chain reaction (MS-PCR) and compared with histopathological and clinical variables and with immunohistochemical hTERT expression. Promoter methylation was found in 62 samples (53 %) and tended to be higher in meningiomas (N = 19/41, 46 %) than in hemangiopericytomas (N = 8/33, 24 %, p = .057). In meningiomas, methylation was 16, 60 and 77 % in grade I, II and III tumors (p < .001) and higher in recurrent (N = 33/37, 89 %) than in primary diagnosed (N = 19/41, 46 %) tumors (OR 5.14, 95 % CI 1.34–19.71, p = .017). Univariate analyses showed shorter mean progression free and overall survival in methylated than in unmethylated individuals (26 vs. 100 months; p = .045 and 110 vs. 113 months; p = .025, respectively). Moreover, hTERT expression was found in 70 % (N = 53) and was more frequent in methylated than in unmethylated samples (78 vs. 52 %, OR 3.36, 95 % CI 1.20–9.40, p = .021). In hemangiopericytomas, methylation was similar in grade II (24 %) and III (25 %, p > .05) and in primary (24 %) and recurrent tumors (40 %, p > .05). hTERT expression was similar as compared to meningiomas (74 %, N = 28, p > .05) but was independent of promoter methylation (OR 4.26, 95 % CI 0.47–39.0, p = .199). In meningeal tumors, hTERT promoter methylation is more common than mutations and in meningiomas but not in hemangiopericytomas positively correlated with WHO grade and hTERT expression.
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Metadaten
Titel
hTERT promoter methylation in meningiomas and central nervous hemangiopericytomas
verfasst von
Gina Fürtjes
Michaela Köchling
Susanne Peetz-Dienhart
Andrea Wagner
Katharina Heß
Martin Hasselblatt
Volker Senner
Walter Stummer
Werner Paulus
Benjamin Brokinkel
Publikationsdatum
27.07.2016
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 1/2016
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-016-2226-6

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