Journals / Turkish Journal of Gastroenterology / 2003 / Cilt: 14 - Sayı: 2

Gastrointestinal stromal tümörlerde p27 ekspresyonu ve hücre çoğalması

p27 expression and proliferation in gastrointestinal stromal tumors

Pages
132–137
DOI
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⚡ TL;DR(Too Long; Didn't Read)

Conclusion: Our results suggest that decreased levels of p27 labelling index could predict the malignant behavior of gastrointestinal stromal tumors and might be associated with tumor cell proliferative activity.

📌 3 Key Takeaways

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Objective & Hypothesis:The p27 is a cyclin-dependent kinase inhibitor which plays a pivotal role in cell proliferation during development and tumorigenesis.
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Key Findings & Data:Recently, it was shown that low expression of p27 tends to occur in more aggressive neoplasms.
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Conclusion & Impact:Conclusion: Our results suggest that decreased levels of p27 labelling index could predict the malignant behavior of gastrointestinal stromal tumors and might be associated with tumor cell proliferative activity.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Siklin bağımlı kinazlar · Gastrointestinal neoplazmlar · İmmünohistokimya

Abstract

The p27 is a cyclin-dependent kinase inhibitor which plays a pivotal role in cell proliferation during development and tumorigenesis. Recently, it was shown that low expression of p27 tends to occur in more aggressive neoplasms. In gastrointestinal stromal tumors p27 expression and its correlation with proliferation remain to be elucidated. The aim of the present study was to investigate the expression of p27 and proliferation in gastrointestinal stromal tumors. Methods: p27 and Ki-67 immunostained tissue sections from 45 gastrointestinal stromal tumors (benign, borderline and malignant) were subjected to quantitative analysis, and p27 labelling index and Ki-67 labelling index were obtained for each case. Results: The mean values of Ki-67 labelling index in the three groups were significantly different (benign, 4.53%; borderline, 9.82%; and malignant, 15.35%) (p<0.05). p27 labelling index was decreased in malignant tumors (10.46%) compared with benign (36.56%) and borderline tumors (21.36%) (p<0.05). Moreover, in each group p27 labelling index exhibited a significant inverse relation to p67 labelling index (p<0.001). Conclusion: Our results suggest that decreased levels of p27 labelling index could predict the malignant behavior of gastrointestinal stromal tumors and might be associated with tumor cell proliferative activity.

Özet

p27 gelişim ve tümörogenez boyunca hücre çoğalmasında önemli rol oynayan, sikline bağımlı kinaz inhibitorüdür. Geçmişte düşük p27 ekspresyonunun daha agresif neoplazilerde bulunmaya eğilimli olduğu gösterilmiştir. Gastrointestinal stromal tümörlerde ise p27 ekspresyonu ve p27 ekspresyonunun proliferasyon ile ilişkisi henüz araştırılmamıştır. Bu çalışmanın amacı gastrointestinal stromal tümörlerde p27 ekspresyonu ve proliferasyonu araştırmaktır. Yöntem: Her bir olguya ait p27 ve Ki-67 ile immünohistokimyasal olarak boyanmış doku kesitlerinde kantitatif olarak p27 bağlanma endeksi (p27LI) ve Ki-67 bağlanma endeksi (KLI) belirlendi. Bulgular: Üç grubun KLI'i arasında anlamlı bir fark olduğu görüldü (benign, 4.53%; sınır olgu, 9,82%; ve malign, 15.35 %)(p<0.05). p27LI'i benign (36.56%) ve sınır olgular (21.36%) ile karşılaştırıldığında malign olgularda daha düşüktü (10.46%) (p<0.05). Ek olarak, her bir grupta p27LI ile KLI arasında anlamlı ve ters bir korelasyon olduğu görüldü (p<0.05). Sonuç: Sonuçlarımız, düşük p27LI'nin gastrointestinal stromal tümörler'in malign davranışını belirleyebileceğini ve tümör hücrelerinin proliferative aktiviteleri ile ilişkili olabileceğini düşündürmektedir.

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Cite This Article

GELEN, M. T., ELPEK, G. Ö., AKSOY, N. H., ÖĞÜŞ, M., SÜLEYMANLAR, İ., IŞITAN, F. (2003). Gastrointestinal stromal tümörlerde p27 ekspresyonu ve hücre çoğalması. Turkish Journal of Gastroenterology, Cilt: 14 - Sayı: 2, 132–137. https://ajindex.com/articles/410396

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