Journals / Turkish Journal of Gastroenterology / 2005 / Cilt: 16 - Sayı: 1

Kronik hepatit B virüs infeksiyonunda P21 proteininin hastalık aktivitesi ve hepatosit proliferasyonu ile ilişkisi

P21 expression and its relation to disease activity and hepatocyte proliferation in chronic hepatitis B virus infection

Pages
12–16
DOI
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⚡ TL;DR(Too Long; Didn't Read)

Conclusions: These results suggest that the pattern of P21 expression is not associated with histological activity, hepatocyte proliferation and virus replication in patients with well-compensated chronic hepatitis B.

📌 3 Key Takeaways

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Objective & Hypothesis:Background/aims: P21 protein, a cell cycle regulatory protein expressed in the liver, acts as an inhibitor of cyclin dependent kinase and prevents progression of the cell cycle.
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Key Findings & Data:In the present study, our aim was to investigate the relationships between P21 protein expression and hepatocyte proliferation, hepatitis B virus replication, and hepatitis activity.
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Conclusion & Impact:Conclusions: These results suggest that the pattern of P21 expression is not associated with histological activity, hepatocyte proliferation and virus replication in patients with well-compensated chronic hepatitis B.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Hepatositler · Geriyedönük çalışma · Hepatit B

Abstract

Background/aims: P21 protein, a cell cycle regulatory protein expressed in the liver, acts as an inhibitor of cyclin dependent kinase and prevents progression of the cell cycle. In the present study, our aim was to investigate the relationships between P21 protein expression and hepatocyte proliferation, hepatitis B virus replication, and hepatitis activity. Methods: A total of 66 patients with chronic hepatitis B without cirrhosis were included in the study. These patients were evaluated in three different groups according to the degree of viral replication and the disease activity. Group 1: HBeAg-positive patients with active liver disease and with viral replication, group 2: HBeAg-negative patients with active liver disease and with viral replication, and group 3: HBeAg-negative inactive carriers. P21 and proliferating cell nuclear antigen were immunohistochemically stained and a labeling index was calculated for each protein. Results: A total of 32 (48.4%) patients were positive for nuclear P21 expression. All three groups had a similar P21 index. proliferating cell nuclear antigen-labeling index, hepatit B virus DNA levels, ALT levels, and HAI scores were not different in patients with and without P21 staining. Spearman’s correlation analysis found no correlation between P21 staining and ALT and hepatit B virus DNA levels, HAI score and proliferating cell nuclear antigen-labeling index. Conclusions: These results suggest that the pattern of P21 expression is not associated with histological activity, hepatocyte proliferation and virus replication in patients with well-compensated chronic hepatitis B.

Özet

Amaç: P21 proteini, siklin bağımlı kinazları inhibe ederek hücre siklüsünün progresyonunu önleyen ve karaciğerde eksprese olan bir hücre siklüsü düzenleyici proteinidir. Biz bu çalışmada P21 protein ekspresyonu ile hepatosit proliferasyonu, hepatit B virüs replikasyonu ve hepatit aktivitesi arasında ilişki olup olmadığını sınamayı amaçladık. Yöntem: Çalışmaya siroz olmayan 66 kronik hepatit B hastası alındı. Bu hastalar viral replikasyon derecesi ve hastalık aktivitesine göre 3 gruba ayrılarak değerlendirildi. 1. grupta HBeAg pozitif ve aktif karaciğer hastalığı olanlar, 2. grupta HBeAg negatif ve aktif karaciğer hastalığı olanlar, 3. grupta HBeAg negatif ve inaktif taşıyıcılar bulunuyordu. P21 ve proliferating cell nuclear antigen boyamaları immünhistokimyasal yöntemle yapıldı ve her birinin labelling index olarak adlandırılan boyanma indeksleri hesaplandı. Bulgular: Toplam 66 hastanın 32'sinde (%48.4) P21 nükleer boyanması pozitifti. Tüm gruplar P21 boyanma indeksleri yönünden benzerdi. P21 boyanan ve boyanmayan hastalar arasında proliferating cell nuclear antigen boyanma indeksi, hepatit B virüs DNA düzeyleri, ALT düzeyleri ve HAİ skorları açısından fark yoktu. Spearman korelasyon analizi yapıldığında P21 boyanma durumu ile ALT düzeyleri, hepatit B virüs DNA düzeyleri, HAİ skorları ve proliferating cell nuclear antigen boyanma indeksleri arasında korelasyon bulunmadı. Sonuç: Bu çalışmanın sonucunda, kronik hepatit B infeksiyonlu hastalarda P21 ekspresyonu ile histolojik aktivite, hepatosit proliferasyonu ve virüs replikasyonu arasında ilişki saptanmadı.

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Cite This Article

VARLI, M., HEPER, O. A., ERDEN, E., UZUNALİMOĞLU, Ö., YURDAYDIN, C., BOZKAYA, H. (2005). Kronik hepatit B virüs infeksiyonunda P21 proteininin hastalık aktivitesi ve hepatosit proliferasyonu ile ilişkisi. Turkish Journal of Gastroenterology, Cilt: 16 - Sayı: 1, 12–16. https://ajindex.com/articles/410879

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