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Spots Global Cancer Trial Database for Study of Tamoxifen Dose Escalation in Breast Cancer Patients With CYP2D6 Polymorphisms

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We do not endorse or review these studies in any way.

Trial Identification

Brief Title: Study of Tamoxifen Dose Escalation in Breast Cancer Patients With CYP2D6 Polymorphisms

Official Title: A Multi-Centre Study of Tamoxifen Dose Escalation Study in Breast Cancer Patients With CYP2D6 Polymorphisms

Study ID: NCT01075802

Interventions

Tamoxifen

Study Description

Brief Summary: Tamoxifen is an important drug for the treatment of breast cancer. Used adjuvantly after operation in early breast cancer, tamoxifen reduces annual recurrence rate by half and cancer death by one third. Used preventatively it also reduces the risk of breast cancer by 50% in women at high risk for developing the disease Tamoxifen needs to be activated in the body to an active form called endoxifen, mainly by the enzyme called CYP2D6. Patients have variable capability to activate tamoxifen due to variable function of this enzyme. Studies showed clear correlation of specific genetic variant of CYP2D6 with endoxifen blood levels. It is estimated that up to 25% Caucasian population have reduced or even absent CYP2D6 function. More recently, there were studies that showed the correlation with genetic variant of CYP2D6 and breast cancer relapse in early breast cancer patients treated with tamoxifen. Food and Drug Authority (FDA) in America and recommended checking CYP2D6 genotype in patients receiving tamoxifen treatment, but they did not specify how to interpret the genotype results and what kind actions to take in patient with adverse genotype. The aim of the investigators study is to see if increasing tamoxifen in patients with genetic polymorphism of CYP2D6 will increase endoxifen level to the same range of most patients who have wild type (normal functional)CYP2D6.

Detailed Description:

Eligibility

Minimum Age: 18 Years

Eligible Ages: ADULT, OLDER_ADULT

Sex: ALL

Healthy Volunteers: No

Locations

St George Hospital, Sydney, New South Wales, Australia

Westmead Cancer Care Centre, Westmead, New South Wales, Australia

Contact Details

Name: Howard Gurney, MBBS,FRACP

Affiliation: South West Sydney Local Health District

Role: PRINCIPAL_INVESTIGATOR

Useful links and downloads for this trial

Clinicaltrials.gov

Google Search Results

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