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Many currently marketed drugs exert their pharmacological effects by binding to ligand-activated transcription factors and modulating gene expression. One example, are various drugs that target the estrogen receptor to treat breast cancer, osteoporosis and post-menopausal symptoms. Below is a ChIP experiment examining the effects of no drug treatment (C), the natural hormone estrogen (E) and the drugs tamoxifen (T) and raloxifene (R) on recruitment of coactivators (SRC-1 and CBP), Histone Deacetylase Complexes (HDACs) and acetylation of histones associated with the C-myc gene. Which of the following statements are correct based on this data (select all that apply)?

Many currently marketed drugs exert their pharmacological effects by binding to ligand-activated transcription factors and modulating gene expression. One example, are various drugs that target the estrogen receptor to treat breast cancer, osteoporosis and post-menopausal symptoms. Below is a ChIP experiment examining the effects of no drug treatment (C), the natural hormone estrogen (E) and the drugs tamoxifen (T) and raloxifene (R) on recruitment of coactivators (SRC-1 and CBP), Histone Deacetylase Complexes (HDACs) and acetylation of histones associated with the C-myc gene. Which of the following statements are correct based on this data (select all that apply)?

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Many currently marketed drugs exert their pharmacological effects by binding to ligand-activated transcription factors and modulating gene expression. One example, are various drugs that target the estrogen receptor to treat breast cancer, osteoporosis and post-menopausal symptoms. Below is a ChIP experiment examining the effects of no drug treatment (C), the natural hormone estrogen (E) and the drugs tamoxifen (T) and raloxifene (R) on recruitment of coactivators (SRC-1 and CBP), Histone Deacetylase Complexes (HDACs) and acetylation of histones associated with the C-myc gene. Which of the following statements are correct based on this data (select all that apply)? 

 

Breast Uterus ERa SRC-1 C No Drug E Estrogen T Tamoxifen R Raloxifene HDAC2 HDAC4 CETRCETR CETRCETR СВР ACH CETRCETR A. Tamoxifen represses C-myc expression in both breast and uterus B. Estrogen promotes acetylation of histones in both the breast and uterus which results in increased expression of C-myc gene. C. Raloxifene promotes deacetylation of histones which would inhibit expression of C-myc in both breast and uterus. D. Tamoxifen promotes binding of SRC to C-myc promoter in the uterus which will enhance transcription of C-myc in the uterus E. Estrogen promotes binding of CBP in both the breast and uterus which results in increased expression of C-myc gene.
Transcribed Image Text:Breast Uterus ERa SRC-1 C No Drug E Estrogen T Tamoxifen R Raloxifene HDAC2 HDAC4 CETRCETR CETRCETR СВР ACH CETRCETR A. Tamoxifen represses C-myc expression in both breast and uterus B. Estrogen promotes acetylation of histones in both the breast and uterus which results in increased expression of C-myc gene. C. Raloxifene promotes deacetylation of histones which would inhibit expression of C-myc in both breast and uterus. D. Tamoxifen promotes binding of SRC to C-myc promoter in the uterus which will enhance transcription of C-myc in the uterus E. Estrogen promotes binding of CBP in both the breast and uterus which results in increased expression of C-myc gene.
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