Asian Pacific Journal of Cancer Prevention

  • 제17권4호
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  • Pages.1851-1855
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  • 2016
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  • 1513-7368(pISSN)
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  • 2476-762X(eISSN)
아시아태평양암예방학회 (Asian Pacific Journal of Cancer Prevention)
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Effects of SULT1A1 Copy Number Variation on Estrogen Concentration and Tamoxifen-Associated Adverse Drug Reactions in Premenopausal Thai Breast Cancer Patients: A Preliminary Study

  • Charoenchokthavee, Wanaporn (Department of Pharmacy Practice, Faculty of Pharmaceutical Science, Department of Medicine, Chulalongkorn University) ;
  • Ayudhya, Duangchit Panomvana Na (Department of Pharmacy Practice, Faculty of Pharmaceutical Science, Department of Medicine, Chulalongkorn University) ;
  • Sriuranpong, Virote (Medical Oncology Unit, Department of Medicine, Chulalongkorn University) ;
  • Areepium, Nutthada (Department of Pharmacy Practice, Faculty of Pharmaceutical Science, Department of Medicine, Chulalongkorn University)
  • 발행 : 2016.06.01
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초록

Tamoxifen is a pharmacological estrogen inhibitor that binds to the estrogen receptor (ER) in breast cells. However, it shows an estrogenic effect in other organs, which causes adverse drug reactions (ADRs). The sulfotransferase 1A1 (SULT1A1) enzyme encoded by the SULT1A1 gene is involved in estrogen metabolism. Previous research has suggested that the SULT1A1 copy number is linked with the plasma estradiol (E2) concentration. Here, a total of 34 premenopausal breast cancer patients, selected from the Thai Tamoxifen (TTAM) Project, were screened for their SULT1A1 copy number, plasma E2 concentration and ADRs. The mean age was $44.3{\pm}11.1years$, and they were subtyped as ER+/progesterone receptor (PR)+ (28 patients), ER+/PR- (5 patients) and ER-/PR- (1 patient). Three patients reported ADRs, which were irregular menstruation (2 patients) and vaginal discharge (1 patient). Most (33) patients had two SULT1A1 copies, with one patient having three copies. The median plasma E2 concentration was 1,575.6 (IQR 865.4) pg/ml. Patients with ADRs had significantly higher plasma E2 concentrations than those patients without ADRs (p = 0.014). The plasma E2 concentration was numerically higher in the patient with three SULT1A1 copies, but this lacked statistical significance.

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참고문헌

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피인용 문헌

  1. Tamoxifen vol.1643, pp.1, 2017, https://doi.org/10.1007/s40278-017-27748-3