Pathology & Oncology Research

, Volume 17, Issue 2, pp 269–275

Are GSTM1, GSTT1 and CAG Repeat Length of Androgen Receptor Gene Polymorphisms Associated with Risk of Prostate Cancer in Iranian Patients?

  • Zahra Ousati Ashtiani
  • Sayed-Mohammad Hasheminasab
  • Mohsen Ayati
  • Bareto Sabah Goulian
  • Mohammad Hossein Modarressi

DOI: 10.1007/s12253-010-9309-z

Cite this article as:
Ashtiani, Z.O., Hasheminasab, SM., Ayati, M. et al. Pathol. Oncol. Res. (2011) 17: 269. doi:10.1007/s12253-010-9309-z


We conducted this study to investigate whether CAG repeat length in androgen receptor gene and GSTM1 and GSTT1 polymorphisms influence prostate cancer risk in Iranian newly diagnosed cancer patients compared to age-matched BPH group and healthy individuals. DNA from 110 pathologically-confirmed prostate cancer patients, 99 age-matched men with Benign Prostatic Hyperplasia (BPH) and 100 healthy individuals were extracted and amplified by polymerase chain reaction (PCR). PCR products were examined by electrophoresis and sequencing. The mean number of CAG repeat in prostate cancer patients was significantly smaller than normal (19.9 vs 22.8; p < 0.0001) and BPH groups (19.9 vs 21.9; P < 0.0001) The mean difference between normal individuals and BPH group was also significant (21.9 vs. 22.8; P = 0.003). Presence of GSTM1 null genotype were significantly higher in cancer and BPH group vs. normal individuals (both P values < 0.0001). there was not seen association between GSTT1 null or positive genotype with cancer risk, but analysis of GSTM1 null and GSTT1 positive in combination was statistically associated with Prostate cancer risk (OR = 8.4, 95% CI 1.53–46.73). Our results showed that CAG repeat polymorphism in AR gene may act as a risk modifier and GSTM1 null genotypes also may be contributed to prostate cancer susceptibility in Iranian patients.


Prostate cancer AR gene CAG repeat GSTM1 GSTT1 



Glutathione S-transferases


Benign Prostatic Hyperplasia


Androgen Receptor


Prostatic Intraepithelial Neoplasia


Prostate Specific Antigen


Transrectal Ultrasound

Copyright information

© Arányi Lajos Foundation 2010

Authors and Affiliations

  • Zahra Ousati Ashtiani
    • 1
  • Sayed-Mohammad Hasheminasab
    • 1
  • Mohsen Ayati
    • 2
  • Bareto Sabah Goulian
    • 3
  • Mohammad Hossein Modarressi
    • 1
  1. 1.Department of Medical Genetics, School of MedicineTehran University of Medical ScienceTehranIran
  2. 2.Department of Urology Tehran, Imam Khomeini General HospitalTehran University of Medical SciencesTehranIran
  3. 3.Biston Ultasound ClinicTehranIran

Personalised recommendations