Sweaty has 2 many lectures: CA, BPH, overactive bladder Flashcards
anastrozole
aromatase inhibitor: REVERSIBLE (non-steroidal)
Tx: breast CA
exemestane
aromatase inhibitor: IRREVERSIBLE (steroid structure)
Tx: breast CA
letrozole
aromatase inhibitor: REVERSIBLE (non-steroidal)
Tx: breast CA
aromatase inhibitors
oral daily
block CYP19A1 mediated production of estrone and estradiol
Tx: ER+ breast CA in POST-menopausal (can’t use in pre-menopausal women: E comes from other mechanisms)
AE: post menopausal (hot flash, hair thinning), teratogen, arthralgia, diarrhea
raloxifene
monthly IM SERM ER agonist: bone ER antagonist: breast, uterus Tx: ER+ breast CA prevent: BRCA2 related breast CA
tamoxifen
daily PO SERM metabolized via CYP2D6 to more potent products: possible sub-optimal effect in poor metabolizers (no FDA requirement for testing) ER agonist: bone, uterus ER antagonist: breast Tx: ER+ breast CA prevent: BRCA2 related breast CA BBW: endometrial CA/hypertrophy, vaginal bleeding
toremifene
PO daily SERM (derivative of tamoxifen) CYP3A4 metabolism Tx: ER+ breast CA BBW: QT PROLONGATION lacks BBW of other SERM: but avoid with Hx of endometrial CA/hyperplasia and thromboembolic disease
fulvestrant
monthly IM
SERD: binds ER and prevents dimerization in the nucleus (pure antagonist)
Tx: ER+ breast CA
AE: post menopausal symptoms
SERM
selective estrogen receptor modifier
ER agonist MOA: recruits coactivators
ER antagonist MOA: recruits corepressors (HISTONE DEACETYLASE I stabilizes nucleosome and prevents mRNA production)
Tx: ER+ breast CA (more important in post menopause, but can use in pre)
prevent: BRCA2 breast CA (BRCA1 is ER-)
improves: lipid profile, increase bone mineralization
AE: teratogen, retinal degeneration
BBW: thromboembolic disease, stroke
goserelin
SC
GnRH agonist
Tx: breast CA, prostate CA
GnRH agonist in Tx of CA
use is CONTINUOUS: down regulates GnRH receptors causing fall of FSH and LH and therefore estrogen
FLARE UP of disease initially: bone pain (metastases), hypercalcemia, breast enlargement/tenderness
WEEKS to lower estrogen/androgen levels: use ANDROGEN RECEPTOR BLOCKERS until then
Tx: prostate CA, breast CA in PRE-menopausal women (not effective because ovaries aren’t working anyway)
AE: post-menopausal (including done density); decrease bone density, elevated lipids, weight gain, DM, CV risk, sexual dysfunction/ loss of libido, gynecomastia, injection site reaction
CI: PREGNANCY
pertuzumab
Her-2/neu Ab: blocks heterodimerization of HER2 with HER3/4 (EGFRs)
Tx: breast CA
AE: decreased left ventricular ejection fraction, neutropenia, leukopenia
trastuzumab
Her-2/neu Ab: binds juxtraglomerular region of extracellular domain of HER2
Tx: breast CA
AE: cardiac, renal, hepatic, pulmonary
BBW: cardiomyopathy, infusion rxn (respiratory)
ado-trastuzumab/ emtasine (T-DM1)
Her-2/neu Ab: binds receptor causing it to be internalized allowing linked chemo agent to act on microtubules
Tx: breast CA
BBW: HF/ventricular dysfunction, hepatic
her-2/neu mAb
IV
Tx: breast CA
AE: hypersensitivity (asthenia, faitugue, GI), blood dyscrasia, INFUSION RXN (dyspnea, hypotension, rash)
BBW: pregnancy
lapatinib
oral
TKI: inhibits HER1/2: binds INTRACELLULAR ErbB1/2 at ATP binding site preventing phosphorylation/activation of receptor
metabolism: CYP3A4/5
Tx: breast CA
AE: GI toxicity, hand-foot syndrome, rash, anemia/thrombocytopenia, QT PROLONGATION, LUNG (interstitial lung disease/pneumonitis)
BBW: CI in LIVER DISEASE (increase drug levels)
monitor: LFT
everolimus
mTOR inhibitor: bind FKBP-12 substrate/inhibit: CYP3A4, P-gp inhibits: CYP2D6 Tx: ER+ breast CA AE: blood dyscrasia, hyperglycemia/lipidemia, elevated creatinine, diarrhea/constipation monitor: blood glucose, CBC, LFTs, lipid-triglyceride-creatinine profiles BBW: INFECTION, NEOPLASIA (lymphoma/SCC) use with: EXEMESTANE
SERDs
selective estrogen receptor downregulator
Tx: ER+ breast CA (more important in post menopause, but can use in pre)
AE: post menopausal (hot flashes, asthenia, pain)
Why might the initial response to anti-estrogen treatment of breast CA not be sustained longterm?
SERM, SERD, aromatase inhibitors
CA finds alternative proliferation pathways
CYP3A4
tormifene
lapatinib (also 3A5)
everolimus
CYP2D6
tamoxien
everolimus
CYP19A1
aromatase inhibitors
What provides superior outcomes in postmenopausal women with breast CA compared to tamoxifen alone?
aromatase inhibitor for 5 years
or following tamoxifen up with aromatase inhibitors for 5 years total
P-gp
everolimus
How is triple neg. breast CA treated?
Sx (first for all breast CA)
drug therapy depends on tumor size, lymph involvement
adjuvant/neoadjuvant/metastatic: radiation, conventional chemo drugs
Besides determining drug choice for a patient, what is tumor genotyping used for?
determining prognosis: need for drug therapy after Sx?
good prognostic indicators: watch and wait
bad prognostic indicators: adjunctive therapy
standard adjuvant chemotherapy regimens for breast CA
ALL include cyclophosphamide and doxorubicin (with/out: taxol or fluorouracil)
exception: docetaxel and cyclophosphamide with or without doxorubicin
doxorubicin
anthracycline
MOA: intercalator, free radical generation, topo II inhibitor
Tx: triple neg. breast CA, ovarian CA, bladder CA
AE: CUMULATIVE CARDIOTOXICITY, secondary malignancy, myelosuppression, hepatic, extravasational necrosis
cyclophosphamide
Tx: triple neg. breast CA, ovarian CA
AE: renal, pulmonary fibrosis, secondary malignancy, blood dyscrasia
fluorouracil
Tx: triple neg. breast CA
Do PR+ tumors have a poor/good prognosis?
Why?
good
suppresses tumor invasion and metastasis by maintaining epithelial cell phenotype and impeding the EMT (epithelial-mesenchymal transition)
medroxyprogesterone
depo progestin
MOA: bind progestin receptors and block GnRH release
Tx: endometrial CA
AE: amenorrhea, edema, anorexia, weakness
megestrol
oral progestin
MOA: suppresses LH release, enhances estrogen degradation
Tx: endometrial CA
AE: weight gain, post menopausal, tumor flare, thrombophlebitis, thromboembolism, PE
docetaxel
taxol
Tx: triple neg. breast CA, prostate CA
carboplatin
platinum: less potent
Tx: ovarian CA, testicular CA
AE: MYELOSUPPRESSION: THROMBOCYTOPENIA, cumulative anemia, blood dyscrasia
cisplatin
MOA: platinum plus CCDP: ace on mitochondria to produce oxidative and reticular stress: cascade including pro-apoptotic BAK and BAX and VDAC; activates p53
platinum
Tx: ovarian CA, bladder CA, testicular CA
AE (actively pumped into these cells: OCT2): NEPHROTOXIC, OTOTOXIC, neuro
nephro: HYDRATE, AMIFOSTINE
oto: antioxidants
CDDP important for loss of activity
paclitaxel
taxol
Tx: ovarian CA, testicular CA
AE: MYELOSUPPRESSION
bacillus calmette-guerin (BCG)
intravesical instillation after TURBC
MOA: req. host immune response: binds urothelial cells and activates APCs to induce effector cells (CTLs, NKs, LAKs (lymphokine activated killer), BAKs (BCG activated killer) cells)
response in hours and lasts for days
Tx: bladder CA
mitomycin C
intravesical instillation
MOA: mono/bi-functional alkylating agent
Tx: bladder CA
AE: chemical CYSTITIS, contact DERMATITIS (PALMAR/PLANTAR ERYTHEMA); pancytopenia (if used IV), dyspnea/unproductive cough
thiotepa
intravescular instillation
MOA: polyfunctional alkylator with loss of aziridine (alkylator) moiety
small, lipophilic: easily penetrates urothelium: SYSTEMIC TOXICITY
Tx: bladder CA
AE: dysuria, urinary renetion, chemical/hemorrhagic CYSTITIS, RENAL dysfunction; pancytopenia (if used IV)
Tx of ovarian CA
- stage 1/2?
- stage 3/4?
- advanced?
- locally confined?
only conventional chemo (after Sx)
- stage 1/2: platinum drug with cyclophosphamide and/or doxorubicin
- stage 3/4: platinum drug with paclitaxel
- advanced: drugs given systemically
- local: option of intra-peritoneal instillation of cisplatin (1-2L, rotate side to side for coverage of peritoneal surface, then drained off)
Tx of bladder CA
- superficial disease
- with tumor progression
- trans-urethral resection of bladder CA (TURBC) followed by intravesical instillation (BCG, mitomycin, thiotepa)
- conventional chemo, csytectomy
platinum drugs
DNA intrastrand crosslinks: N7
AE: allergy, myelo-suppression
taxols
inhibits breakdown of microtubules
AE: PERIHPERAL NEUROPATHY, hypersensitivity
How can drugs for bladder CA given through intravesicular instillation become systemic?
trans-urethral resection of the bladder cancer can damage bladder integrity and containment of drugs
-phosphomides
MOA: alkylating agent: inter/intrastrand DNA crosslinks
prodrug: needs activation
AE: HEMORRHAGIC CYSTITIS
give MESNA
MESNA
use with CYCLOPHOSPHAMIDE and IFOSFOMIDE to protect against hemorrhagic cystitis
bicalutamide
androgen receptor blocker (some AGONIST activity): prostate greater than central
inhibitor: CYP3A4/2C9/19,2D6
enzalutamide
androgen receptor blocker: prostate and central
AE: MALE (and female) teratogen, CNS (seizure), URTI
flutamide
androgen receptor blocker: Prostate ONLY
AE: blood dyscrasia
BBW: HEPATOTOXICITY
Tx: hirsuitism, PCOS