Journals / Journal of Neurological Sciences (Turkish) / 2009 / Cilt: 26 - Sayı: 4

Pineal parankimal tümörlerde p53 protein,siklin D1 ve Ki-67'nin prognostik önemi

Prognostic significance of p53 protein, cyclin D1 and Ki-67 in pineal parenchymal tumours

Pages
432–441
Publication Date
2022-10-19
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The very low level of p53 protein made us think that it does not play an active role in the development of these tumours.

📌 3 Key Takeaways

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Objective & Hypothesis:Pineal parenchymal tumours are very rare consisting less than 0.1% of all central nervous system tumours.
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Key Findings & Data:The aim of this study was to investigate the prognostic significance of Ki-67, cyclin D1 and p53 protein expressions in pineal parenchymal tumours.
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Conclusion & Impact:The very low level of p53 protein made us think that it does not play an active role in the development of these tumours.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Pineal parenchymal tumours are very rare consisting less than 0.1% of all central nervous system tumours. The aim of this study was to investigate the prognostic significance of Ki-67, cyclin D1 and p53 protein expressions in pineal parenchymal tumours. Ten pineal parenchymal tumours were investigated: 2 pineocytomas, 5 pineal parenchymal tumour of intermediate differentiation and 3 pineoblastomas . Immunohistochemical staining was performed using avidin-biotin-peroxidase method. The number of mitoses ranged from 0-25 in pineal parenchymal tumour of intermediate differentiation and 2-30 in pineoblastomas. In general, Ki-67 was found between 0-53.5 %, cyclin D1 was found between 0-40%, p53 was found between 0-4% in pineal parenchymal tumors. In pineal parenchymal tumour of intermediate differentiation, positive staining rates for Ki-67, cyclin D1 and p53 were found as 4-17.5%, 2-30% and 0-4%, respectively. In pineoblastomas, Ki-67, cyclin D1 and p53 were found as 9.2-53.5%, 5-40% and 1-2%, respectively. The number of mitoses was not significant for the prognosis in pineal parenchymal tumors. The very low level of p53 protein made us think that it does not play an active role in the development of these tumours.

Özet

Pineal parankimal tümörler çok seyrek görülürler,tüm santral sinir sistemi tümörlerinin % 0.1 den daha azını oluştururlar. Bu çalışmanın amacı pineal parankimal tümörlerde Ki-67, siklin D1ve p53 protein ekspresyonlarının prognostik önemini araştırmaktır. On pineal parankimal tümor araştırıldı: 2 pineositoma, 5 intermediyer differansiyasyon gösteren pineal parankimal tümor ve 3 pineoblastom. İmmunhistokimyasal boyamaları avidin –biotin peroksidaz yöntemi kullanılarak yapıldı. Mitoz sayısı intermediyer differansiyasyon gösteren pineal parankimal tümorlerde 0-25 ve pineoblastomlarda 2-30 arasında değişmekteydi. Genelde pineal parankimal tümörlerde Ki-67 yüzde 0-53.5, siklin D1 % 0-40, p53 % 0-4 arasında bulundu. İntermediyer differansiyasyon gösteren pineal parankimal tümorlerde pozitif boyanma oranları sırasıyla Ki-67, siklin D1ve p53 protein % 0.4-17, % 2-30 ve % 0-4 bulundu. Pineoblastomlarda sırasıyla Ki-67, siklin D1ve p53 protein % 9.2-53.5 , % 5-40 ve % 1-2 bulundu. Mitoz sayısı prognoz açısından önemli değildi. Bu tümörlerde çok düşük düzeyde p53 protein varlığı, bu tümörlerin gelişiminde p53 proteinin aktif rol oynamadığını düşündürdü.

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Cite This Article

ERSAHIN, Y., DEMIRTAS, E., BALTALARLI, B., YALCIN, N. (2022). Pineal parankimal tümörlerde p53 protein,siklin D1 ve Ki-67'nin prognostik önemi. Journal of Neurological Sciences (Turkish), Cilt: 26 - Sayı: 4, 432–441. https://ajindex.com/articles/565532

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