Expression of ERG Protein and TMRPSS2-ERG Fusion in Prostatic Carcinoma in Egyptian Patients

  • Ahmed Abdel-Hady Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Ali El-Hindawi Faculty of Medicine Cairo University, Cairo
  • Olfat Hammam Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Heba Khalil Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Sara Diab Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Soulafa Abd El-Aziz Faculty of Medicine Cairo University, Cairo
  • Mohamed Badawy Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Ahmed Ismail Faculty of Medicine Cairo University, Cairo
  • Noha Helmy National Research Center El Doki, Giza
  • Nora Kamel National Research Center El Doki, Giza
  • Shady Anis Faculty of Medicine Cairo University, Cairo
  • Amr El Kholy Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Khalid Al Osili Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Afaf Abdel-Hady Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Hani Nour Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
  • Maha Akl Theodor Bilharz Research Institute, Imbaba, Giza, Cairo
Keywords: Prostatic carcinoma, ERG Immunoexpression, TMRPSS2-ERG, Fluorescence in situ hybridization (FISH), High grade prostatic intraepithelial neoplasia


AIM: Prostate cancer (PCa) is the second most common cancers in men worldwide. Its incidence can be influenced by several risk factors including genetic susceptibility. Therefore the search for the expression of a certain gene (ERG) and its rearrangement could give us clues for proper identification of PCa. And the study of ERG expression and its comparison to FISH in Egyptian patients can show whether ERG immunophenotype could be used instead of FISH, as it is cheaper.

MATERIALS AND METHODS: This study was performed on 85 cases of PCa, showing 30 cases with HGPIN and 30 cases of prostatic hyperplasia. All were immunohistochemistry stained using ERG monoclonal rabbit antihuman antibody was used (clone: EP111). FISH analysis was performed in 38 biopsies of PCa cases to detect TMRPSS2-ERG rearrangement using the FISH ZytoLight TriCheck Probe (SPEC TMRPSS2-ERG).

RESULTS: ERG expression was found in 26% of PCa cases and 20% of HGPIN cases. FISH analysis showed fusion of 21 cases of PCa (out of 22 cases showing ERG immunoexpression).

CONCLUSION: Our findings emphasise that only malignant and pre-malignant cells and not benign cells from the prostate stain positive. ERG expression may offer a simpler, accurate and less costly alternative for evaluation of ERG fusion status in PCa.


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How to Cite
Abdel-Hady A, El-Hindawi A, Hammam O, Khalil H, Diab S, Abd El-Aziz S, Badawy M, Ismail A, Helmy N, Kamel N, Anis S, El Kholy A, Al Osili K, Abdel-Hady A, Nour H, Akl M. Expression of ERG Protein and TMRPSS2-ERG Fusion in Prostatic Carcinoma in Egyptian Patients. Open Access Maced J Med Sci [Internet]. 2017Mar.20 [cited 2020Oct.26];5(2):147-54. Available from:
A - Basic Science

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