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Brief Title: Genotyping and Phenotyping of CYP2D6 Breast Cancer Patients on Tamoxifen
Official Title: Genotyping and Phenotyping of CYP2D6 as Predictor of Z-endoxifen Plasma Levels in Breast Cancer Patients on Tamoxifen Treatment
Study ID: NCT03504631
Brief Summary: This study is an observational study to determine phenotype and genotype of CYP2D6 as predictors of z-endoxifen concentrations in plasma of outgoing patients treated with tamoxifen for at least 4 months
Detailed Description: Tamoxifen is an antiestrogen drug with concentration dependent properties, with z-endoxifen known as active metabolite. Until know therapeutic range for z-endoxifen to improve treatment response was not known. Variation response on tamoxifen can be cause of genetic polymorphism CYP2D6 that can be different between interindividul and ethnic. The aim of this study is to determine phenotype and genotype of CYP2D6 as predictors of z-endoxifen concentrations in plasma of outgoing patients treated with tamoxifen for at least 4 months
Minimum Age:
Eligible Ages: CHILD, ADULT, OLDER_ADULT
Sex: FEMALE
Healthy Volunteers: No
Dharmais hospital, Jakarta, DKI Jakarta, Indonesia
Name: Rianto Setiabudy, MD, PhD
Affiliation: Indonesia University
Role: STUDY_DIRECTOR