Journals / Turkish Journal of Urology / 2016 / Cilt: 42 - Sayı: 2

TMPRSS2-ERG gene fusion in Turkish patients with localized prostate cancer: results of radical prostatectomy specimens

Lokalize prostat kanserli Türk hastalarda TMPRSS2-ERG gen füzyonu: 99 radikal prostatektomi örneğinin sonuçları

Pages
60–63
DOI
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AI Summary & Key Takeaways

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

Only tumor stage correlated with TMPRSS2-ERG fusion.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Our aim was to evaluate and determine the frequency of Transmembrane protease, serine 2 (TMPRSS2)-ERG fusion in Turkish patients with clinically localized prostate cancer by using immunohistochemistry and reveal its relationship with clinicopathologic variables.Material and methods: Radical prostatectomy specimens of 99 patients, who underwent radical retropubic prostatectomy for localized cancer, between January 2002 and December 2011 were analyzed in the study.
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Key Findings & Data:To detect ERG fusions, monoclonal ERG antibodyclone ID: EPR3864 (Epitomics, San Diego, CA, USA) and monoclonal anti-ERG antibody (9FY) (BiocareMedical, LLC, USA) were used.
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Conclusion & Impact:Only tumor stage correlated with TMPRSS2-ERG fusion.
🔬Design:Research Article
📍Scope:2002 Verileri
⚙️Variables:Domain Parameters

Abstract

Objective: Our aim was to evaluate and determine the frequency of Transmembrane protease, serine 2 (TMPRSS2)-ERG fusion in Turkish patients with clinically localized prostate cancer by using immunohistochemistry and reveal its relationship with clinicopathologic variables.Material and methods: Radical prostatectomy specimens of 99 patients, who underwent radical retropubic prostatectomy for localized cancer, between January 2002 and December 2011 were analyzed in the study. To detect ERG fusions, monoclonal ERG antibodyclone ID: EPR3864 (Epitomics, San Diego, CA, USA) and monoclonal anti-ERG antibody (9FY) (BiocareMedical, LLC, USA) were used. The immunistochemical expression of ERG protein was assessed as positive or negative regardless of stain intensity. Patients' age, total and primary Gleason scores, PSA levels, prostate volumes, tumor volumes, tumor stages and perineural invasion status were analysed retrospectively. Total fusion rate and correlation between the variables and fusion were evaluated.Results: Mean age, prostate volume, tumor volume, PSA value of 99 patients were 62.02 years (±5.93), 50.02 cc (±20.67), 3.19 cc (±4.16), and 9.34 ng/mL (±3.37) respectively. TMPRSS2-ERG fusion was seen in 46 (46.5%) of 99 patients. When the variables analysed with independent samples t test to predict fusion (+) status, none of them was found to be statistically significant. When evaluated by logistic regression analysis for (+) or (-) status, only tumor stage was found to be statistically significantly correlated with fusion (p=0.049). Conclusion: The incidence of TMPRSS-ERG fusion in patients with localised prostate cancer in our study with Turkish population was found as 46.5%. Only tumor stage correlated with TMPRSS2-ERG fusion.

Özet

Amaç: Amacımız klinik lokalize prostat kanseri olan Türk hastalarda immunhistokimya kullanarak TMPRSS2ERG füzyonu sıklığını belirlemek ve bunun klinikopatolojik değişkenlerle ilişkisini ortaya koymaktır.Gereç ve yöntemler: Lokalize prostat kanseri nedeniyle Ocak 2002 ve Aralık 2011 yılları arasında radikal retropubik prostatektomi yapılan 99 hastanın radikal prostatektomi örnekleri, çalışmaya alındı. ERG füzyonlarının tespiti için monoclonal ERG antibody clone ID: EPR3864 (Epitomics, San Diego, CA) ve monoclonal anti-ERG antibody (9FY) (Biocare Medical, LLC, ABD) kullanıldı. ETS-Related Gene (ERG) proteininin immunohistokimyasal yoğunluğu ne olursa olsun boyama yoğunluğu pozitif veya negatif olarak değerlendirildi. Hastaların yaşı, toplam ve primer Gleason skorları, prostat spesifik antijen (PSA) düzeyleri, prostat hacimleri, tümör hacimleri, tümör evreleri ve perinöral invazyon durumu retrospektif olarak analiz edildi. Toplam füzyon oranı ve değişkenler ile füzyon arasındaki korelasyon değerlendirildi.Bulgular: Bu 99 hastanın ortalama yaşı, prostat hacmi, tümör hacmi, PSA değerleri sırasıyla 62,02 (±5,93), 50,02 cc (±20,67), 3,19 cc (±4,16), 9,34 ng/mL (±3,37) idi. TMPRSS2-ERG füzyonu 99 hastanın 46'sında (%46,5) görüldü. Klinikopatolojik değişkenler füzyon pozitifliğini öngörmesi açısından bağımsız değişkenler t testi ile değerlendirildiğinde hiç birinde istatistiksel anlamlılık olmadığı görüldü. Klinikopatolojik değişkenler ile füzyon pozitifliği arasındaki korelasyon Lojistik regression analizi ile değerlendirildiğinde sadece tümör evresi istatistiksel olarak anlamlıydı (p=0,049). Sonuç: Türk populasyonunda lokalize prostat kanserli hastalarda TMPRSS-ERG füzyonu %46,5 oranında görülmektedir.Tümör füzyonu ile tek korele olan faktör tümör evresidir.

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Cite This Article

YILMAZ, Ö., BERBER, U., OKÇELİK, S., SOYDAN, H., ATEŞ, F., KARADEMİR, K. (2016). TMPRSS2-ERG gene fusion in Turkish patients with localized prostate cancer: results of radical prostatectomy specimens. Turkish Journal of Urology, Cilt: 42 - Sayı: 2, 60–63. https://ajindex.com/articles/379906

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