Immune altering and hormonal therapy - 23 to 33 Flashcards
How does hormonal therapy work in cancer?
Steroid hormones bind steroid responsiveness element on DNA
Binding activates or promotes gene expression, usually growth factors
Hormone-response elements remain so that in presence of hormone, oncogenes can drive tumor growth
How do glucocorticoids work in cancer?
Suppress white blood cells, used in acute lymphoblastic leukemias to decrease leukemic cells
How do anti-estrogens work in cancer?
Used in breast, uterine, cervix, ovaries
How do anti-androgens work in cancer?
Used in testicular and prostate cancers
What is Tamoxifen?
Estrogen partial agonist (SERM), competes with estrogen for receptor binding
Indications for Tamoxifen?
Estrogen dependent breast tumors
Also used to reduce risk of developing breast tumors in women with strong family history, premenopausal women given for 5 years, postmenopausal 2 years
Tamoxifen toxicities
Hot flashes, nausea, vomiting, myelosuppression, pulmonary embolism
Linked to endometrial cancer and blood clots
Positive estrogenic effects on bone and cholesterol tho!
What is Toremifene?
Tamoxifen analog
Increases TNFB to decrease cell proliferation/decrease cell growth
Indication for Toremifene?
Estrogen dependent breast cancer
Looking at prostate cancer prophylaxis
Tamoxifen toxicities?
Similar response/adverse effects to tamoxifen
Hot flashes, nausea, vomiting, myelosuppression, pulmonary embolism
Linked to endometrial cancer and blood clots
Positive estrogenic effects on bone and cholesterol tho!
What is Raloxifene?
Selective estrogen receptor modulator (SERM’s)
Estrogen effect in bone, CV system
Antagonist in Breast, uterine tissue
Indication for Raloxifene
Mostly used in osteoporosis
FDA approved to reduce breast cancer risk in postmenopausal women with osteoporosis and postmenopausal at high risk for breast cancer
Raloxifene toxicities?
Increased incidence of thromboembolism, hot flashes, muscle cramps, teratogenic in animals
What is Fulvestrant?
Selective estrogen receptor down regulator (SERD’s)
Pure anti-estrogen, down regulates estrogen receptor
How is Fulvestrant administered?
Monthly IM injection