Exam 1 Table Flashcards
5-fluorouracil (5-FU) target
Thymidylate synthase - blocks uracil to thymine conversion
5-fluorouracil (5-FU) drug class
Anti-metabolite; uridine analog
5-fluorouracil (5-FU) cell cycle phase
S
5-fluorouracil (5-FU) dose limiting side effect
Myelosuppression
5-fluorouracil (5-FU) rescue drug
Thymidine
5-fluorouracil (5-FU) synergy drug
Leucovorate
5-fluorouracil (5-FU) unique resistance mechanisms
-Downregulation of activating enzymes that convert 5-FU to fd-UMP
-Upregulation of thymidylate synthase
5-fluorouracil (5-FU) genetic testing
~5% of the population has gene polymorphisms that result in a deficiency of the enzyme dihydropyrimidine dehydrogenase (DPD) which breaks down 5-FU
Cytarabine target
Converted to Ara-CTP intracellularly -> competitive inhibitor of DNA polymerase alpha
Cytarabine drug class
Anti-metabolite; cytosine analog
Cytarabine cell cycle phase
S
Cytarabine indication
-Leukemia
-Lymphoma
Cytarabine dose limiting side effect
Myelosuppression
Cytarabine synergy drug
Tetrahydrouridine because of inhibition of cytidine deaminase
Cytarabine unique resistance mechanisms
-Downregulation of activating enzymes
-Upregulation of cytidine deaminases
-Downregulation of influx transporters
6-mercaptopurine (6-MP) target
Blocks multiple enzymes in de novo purine biosynthesis
6-mercaptopurine (6-MP) drug class
Antimetabolite; purine analog, thio-analog of adenine
6-mercaptopurine (6-MP) cell cycle phase
S
6-mercaptopurine (6-MP) dose limiting side effects
Hematologic toxicity, myelosuppression
6-mercaptopurine (6-MP) drug interactions
Allopurinol increases 6-MP toxicity
6-mercaptopurine (6-MP) unique resistance mechanisms
Loss of HGPRT (activating enzyme)
6-mercaptopurine (6-MP) genetic testing
TPMT polymorphism loss of function - (TPMT inactivates 6-MP) - dose adjustment needed
Methotrexate target
DHFR inhibitor
Methotrexate drug class
Antimetabolite, antifolate
Methotrexate cell cycle phase
S
Methotrexate dose limiting side effect
myelosuppression
Methotrexate rescue drug
Leucovorin
Methotrexate unique resistance mechanisms
-Amplification of DHFR or resistant mutation of DHFR
-Decreased polyglutamation
Chlorambucil target
Cross-links DNA
Chlorambucil drug class
Alkylating agent; mechlorethamine derivative
Chlorambucil cell cycle phase
Non-specific
Chlorambucil dose limiting side effect
-Myelosuppression
-N/V
-Carcinogenic (secondary malignancies) and teratogenic (ALL alkylators)
Alkylating agent/platinum agent unique resistance mechanisms
-Increased expression of DNA repair enzymes
-Increased glutathione concentrations to reduce reactive intermediates
-Increased expression of cellular glutathione S-transferase (GST)
Cyclophosphamide target
Cross-links DNA
Cyclophosphamide drug class
Alkylating agent; requires hydroxylation by CYP450 (prodrug)
Cyclophosphamide cell cycle phase
Non-specific
Cyclophosphamide dose limiting side effects
-Hemorrhagic cystitis - acrolein buildup in bladder
-Mild bone marrow toxicity due to high ADH in these cells that break down metabolite
Drug that must be given with Cyclophosphamide
Mesna is administered with cyclophosphamide to block hemorrhagic cystitis - free thiol on mesna reacts with and inactivates acrolein metabolites in urine
Mitomycin C target
Bifunctional adducts on DNA (cross-links)
Mitomycin C drug class
alkylating agent (aziridine containing natural product)
Mitomycin C cell cycle phase
Non-specific
Mitomycin C dose limiting side effect
Myelosuppression
Cisplatin target
Forms intrastrand crosslinks - covalent crosslink between G and A
Cisplatin drug class
-Platinum drugs - covalent cross linkers
-Prodrug - requires non-enzymatic conversion to the active aqua form
Cisplatin cell cycle phase
Non-specific
Cisplatin dose limiting side effect
-Nephrotoxicity in proximal tube
-Minimal bone marrow toxicity (good in combination with other drugs)
-Severe N/V
-Peripheral neuropathy
-Ototoxicity
-Carboplatin: cutaneous rash, vomiting, hypotension
Irinotecan target
Topo I inhibitor (water soluble) - binds and forms a ternary drug-enzyme-DNA complex -> blocks DNA religation
Irinotecan drug class
-Topo I inhibitor: camptothecins
-Prodrug into SN-38 via carboxylesterases
Irinotecan cell cycle phase
S
Irinotecan unique resistance mechanisms
-P-glycoprotein (PGP) overexpression
-Multidrug resistant protein (MRP) overexpression
-Glutathione S-transferase overexpression
-Topoisomerase downregulation
-Mutation to prevent inhibitor binding
Irinotecan genetic testing
~10% of the population has polymorphisms predicting low expression of UGT1A1, leading to increased toxicity of irinotecan
Doxorubicin target
Topo II inhibitor - intercalates and inhibits double strand religation
Doxorubicin drug class
Topo 2 inhibitor; anthracyclines
Doxorubicin cell cycle
-Non-specific
-A little G2/M
Doxorubicin dose limiting side effects
Cardiotoxicity due to free radical damage, severe local tissue damage if extravasated
Doxorubicin synergetic drugs
Dexrazoxane protects against anthracycline-induced cardiotoxicity by binding to iron
Doxorubicin unique resistance mechanisms
Glutathione S-transferase (GST) overexpression - the only topo 2 to have this resistance
Etoposide target
Topo II inhibitor - inhibits double strand religation
Etoposide drug class
Topo 2 inhibitor; epipodophyllotoxin glucose analog (does not intercalate)
Etoposide cell cycle
G2
Resistance mechanisms for all topo 2 inhibitors
-PGP overexpression
-Topoisomerase II downregulation or mutation
-Increased DNA damage repair enzyme
Bleomycin target
Intercalates into DNA - forms DNA free radical - leads to DNA single and double strand breaks
Bleomycin drug class
Glycopeptide antibiotic - imidazole free radical, thiazole intercalator
Bleomycin cell cycle
-G2
-M
Bleomycin dose limiting side effects
Pulmonary toxicity and rash because of lack of bleomycin aminohydrolase
Bleomycin resistance mechanisms
Increased levels of bleomycin aminohydrolase
Vincristine target
Tubulin -> inhibition of microtubule assembly (tubulin polymerization) and microtubule shortening
Vincristine drug class
Vinca alkaloids - microtubule destabilizer
Vincristine cell cycle
M
Vincristine dose limiting side effects
-Neurotoxicity
-Peripheral neuropathy
-Myelosuppression is mild and rarely clinically significant
Vincristine resistance mechanisms
PGP substrate
Eribulin target
Microtubule end - inhibition of microtubule assembly/elongation (polymerization)
Eribulin drug class
Microtubule destabilizer - halichondrin B analog
Eribulin cell cycle phase
M
Eribulin dose limiting side effects
Lower rate of neurotoxicity than vinca
Paclitaxel target
Tubulin inhibition of microtubule disassembly (depolymerization)
Paclitaxel drug class
Taxanes - microtubule stabilizer
Paclitaxel cell cycle phase
M
Paclitaxel dose limiting side effects
-Myelosuppression
-Neurotoxicity - sensory neuropathy common but reversible
Paclitaxel drug interactions
Cross-resistant with other large molecule antitumor agents
Paclitaxel resistance mechanisms
-PGP substrate (except for cabazitaxel)
-Tubulin mutations
Ixabepilone target
Tubulin inhibition of microtubule disassembly (depolymerization)
Ixabepilone drug class
Microtubule stabilizer - epothilone B analog
Ixabepilone cell cycle phase
M
Ixabepilone dose limiting side effects
-Myelosuppression
-Neurotoxicity - sensory neuropathy common but reversible
Ixabepilone drug interactions
NOT cross-resistant to taxanes
Ixabepilone resistance mechanisms
Poor PGP substrate
Enzalutamide target
Androgen receptor
Enzalutamide drug class
Full AR antagonist
Enzalutamide cell cycle phase
G1
Enzalutamide indication
Metastatic and non-metastatic prostate cancer
Enzalutamide resistance mechanisms
AR mutation that results in androgen independent activation and prevent binding of AR antagonists = castration resistant prostate cancer (CRPC)
Abiraterone target
-17 alpha-hydrolase and C17,20 lyase
-CYP17 catalyzes conversion of pregnenolone and progesterone to DHEA and androstenedione
Abiraterone drug class
Steroid analog
Abiraterone cell cycle phase
G1
Abiraterone dose limiting side effect
Increased cholesterol
Tamoxifen target
Estrogen receptor
Tamoxifen drug class
SERM; partial agonist; prodrug (CYP2D6)
Tamoxifen cell cycle phase
G1
Tamoxifen indication
Pre and postmenopausal women with ER-positive breast cancer
Tamoxifen dose limiting side effects
Hot flashes; increased incidence of endometrial cancer
Tamoxifen drug interactions
CYP2D6 inhibitors
Tamoxifen resistance mechanisms
Variant of CYP2D6 that decreases metabolism of tamoxifen
Fulvestrant target
Estrogen receptor
Fulvestrant drug class
SERD; pure estrogen antagonist; no agonist effects
Fulvestrant cell cycle phase
G1
Fulvestrant indication
ER+ metastatic breast cancer - postmenopausal women who have progressed on other antiestrogen therapy
Prednisolone drug class
Corticosteroid
Prednisolone cell cycle phase
G1
Prednisolone indication
Used as palliative care for inflammation, edema and pain management
Letrozole target
Aromatase
Letrozole drug class
Non-steroidal competitive aromatase (CYP19) inhibitor
Letrozole cell cycle phase
G1
Letrozole indication
Postmenopausal breast cancer
Letrozole dose limiting side effects
Increased extent of bone density loss - increased risk of fracture
Exemestane target
Aromatase
Exemestane drug class
Steroidal aromatase inhibitor; suicide inhibitor (irreversible)
Exemestane cell cycle phase
G1
Exemestane indication
Postmenopausal ER+ breast cancer patients who have progressed on antiestrogen therapy
Exemestane dose limiting side effects
-Minimal toxicity
-Hot flashes
-Occasional peripheral edema
-Weight gain
-Increased cholesterol
Leuprolide target
GnRH receptor
Leuprolide drug class
GnRH analog
Leuprolide cell cycle phase
G1
Leuprolide indication
Premenopausal
Leuprolide dose limiting side effects
-Transient worsening symptoms to initial (flare) effects
-Long term: hot flashes, sexual dysfunction, gynecomastia
Imatinib target
BCR-Abl tyrosine kinase
Imatinib drug class
Type 2 small molecule Bcr-Abl inhibitor
Imatinib cell cycle phase
G1
Imatinib indication
Primary indication for chronic myeloid leukemia (CML) and GIST
Imatinib dose limiting side effects
-N/V
-Fluid retention (edema)
-Neutropenia
-Thrombocytopenia
Imatinib resistance mechanisms
“Gatekeeper” T315I mutation
Imatinib genetic testin
Philadelphia chromosome
Ponatinib target
BCR-Abl tyrosine kinase
Ponatinib drug class
Bcr-Abl inhibitor
Ponatinib cell cycle phase
G1
Ponatinib indication
T315I mutation
Ponatinib genetic testing
Can inhibit the T315I mutation
Midostaurin target
fms-like tyrosine kinase 3 (FLT3) in AML
Midostaurin drug class
First gen FLT3 inhibitor for AML
Midostaurin cell cycle phase
G1
Crenolanib target
fms-like tyrosine kinase 3 (FLT3) in AML
Crenolanib drug class
Second gen (more specific) FLT3 inhibitor for AML
Crenolanib cell cycle phase
G1
Quizartinib target
fms-like tyrosine kinase 3 (FLT3) in AML
Quizartinib drug class
Type II FLT3 inhibitor for AML
Quizartinib cell cycle phase
G1
Quizartinib indication
Specific for internal tandem duplication (ITD) mutations
Quizartinib genetic testing
Internal tandem duplication (ITD) mutations
Sirolimus target
Inhibit the mammalian target of Rapamycin (mTOR; serine-threonine kinase)
Sirolimus drug class
Rapamycin analogues
Sirolimus cell cycle phase
G1
Sirolimus drug interactions
Inhibits immune response by blocking IL-2 signaling transduction
Alectinib target
Anaplastic lymphoma kinase (ALK)
Alectinib drug class
ALK inhibitors
Alectinib cell cycle phase
G1
Alectinib indication
ALK-positive NSCLC who have progressed on or intolerant to crizotinib
Alectinib genetic testing
Fusion gene of ALK to ELM4
Dabrafenib target
BRAF-V600
Dabrafenib drug class
Second gen BRAF-V600 inhibitor
Dabrafenib cell cycle phase
G1
Dabrafenib indication
Combination with trametinib for BRAF V600E/K-mutant metastatic melanoma
Dabrafenib drug interactions
Activation of wild type BRAF remains a problem, combination with trametinib seems to stem from induction of squamous cell carcinomas
Dabrafenib genetic testing
BRAF-V600 mutations
Trametinib target
MEK1 and MEK2
Trametinib drug class
Type III allosteric MEK inhibitor
Trametinib cell cycle phase
G1
Trametinib indication
Combination with dabrafenib
Trametinib dose limiting side effects
-RASH
-Diarrhea
-Lymphedema
Trametinib drug interaction
Not indicated for patients that have received prior BRAF inhibitor therapy
Acalabrutinib target
Bruton’s tyrosine kinase (BTK); also targets Cys481
Acalabrutinib drug class
Second gen covalent BTK inhibitor
Acalabrutinib cell cycle phase
G1
Acalabrutinib indication
B-cell lymphoma: Mantle cell lymphoma and chronic lymphocytic leukemia
Gefitinib target
EGFR tyrosine kinase
Gefitinib drug class
First gen reversible EGFR inhibitor
Gefitinib cell cycle phase
G1
Gefitinib indication
Approved for NSCLC with exon 19 or 21 mutations
Gefitinib dose limiting side effects
-Fatigue
-Rash
-Diarrhea
Gefitinib resistance mechanisms
T790M causes resistance
Gefitinib genetic testing
EGFR exon 19 or exon 21 (L858R) mutation
Afatinib target
Covalent inhibitor of all ErbB receptors
Afatinib drug class
Covalent EGFR inhibitor - second gen
Afatinib cell cycle phase
G1
Afatinib indication
Approved for EGFR mutant NSCLC with EGFR mutations
Afatinib dose limiting side effects
Better rash tolerance
Afatinib resistance mechanisms
T790M causes resistance
Afatinib genetic testing
EGFR RGQ PCR Kit (QIAGEN) for detection of EGFR exon 19 deletions or exon 21 (L858R) substitution mutations
Osimertinib target
EGFR tyrosine kinase
Osimertinib drug class
Third gen covalent EGFR inhibitor
Osimertinib cell cycle phase
G1
Osimertinib indication
Effective for T790M mutant EGFR (replace gefitinib)
Osimertinib resistance mechanisms
C797 mutation that abrogates covalent binding
Lapatinib target
EGFR and HER2
Lapatinib drug class
-EGFR and HER2 reversible inhibitor
-Small molecule TKI
Lapatinib cell cycle phase
G1
Lapatinib indication
Approved in combination with capecitabine for the treatment of advanced metastatic breast cancer in patients who have progressed on other therapies
Lapatinib dose limiting side effects
-Diarrhea
-Nausea
-Vomiting
-Reversible decrease in cardiac function (watch for signs of CHF)
Tucatinib target
HER2
Tucatinib drug class
Small molecule TKI HER2 inhibitor
Tucatinib cell cycle phase
Approved as a second line therapy in combination with trastuzumab and capecitabine for the treatment of advanced metastatic breast cancer who have progressed on other therapies
Tucatinib dose limiting side effects
Reduced side effects compared to lapatinib or covalent pan-ErbB inhibitors
Tucatinib genetic testing
HER2+ breast cancer
Trastuzumab, pertuzumab target
HER2
Trastuzumab, pertuzimab drug class
Recombinant humanized mAB
Trastuzumab, pertuzimab indication
Primary indication is the treatment of breast cancers that overexpress HER2
Trastuzumab, pertuzimab dose limiting side effects
-Flu-like symptoms
-Risk of cardiomyopathy/CHF
-Increases myelosuppression when used in combo with chemo
-Risk of hypersensitivity reactions (immune response)
Trastuzumab, pertuzimab drug interactions
-Trastuzumab used in combo with pertuzimab-different binding sites for HER2 increases efficacy; drug synergy
-Pertuzimab inhibits dimerization
Trastuzumab, pertuzimab genetic testing
HER2 expression
Cetuximab target
EGFR - completely inhibits binding of EGF and TGF-alpha
Cetuximab drug class
Recombinant chimeric mAB
Cetuximab indication
Primary indication is in the treatment of colorectal and head and neck cancers
Cetuximab dose limiting side effects
-Severe infusion reaction (~3%), acneiform rash, asthenias, fever
Bevacizumab target
VEGF (ligand) - blocks interaction with endothelial receptors
Bevacizumab drug class
Recombinant humanized MAB
Bevacizumab indication
-Used in combination with 5-FU based chemotherapy for first-line treatment of metastatic colorectal cancer
-No evidence of efficacy as single agent
Ramucirumab target
VEGFR (receptor)
Ramucirumab drug class
VEGFR (receptor) inhibitor mAB
Ramucirumab indication
-Used in combination with 5-FU based chemotherapy for first-line treatment of metastatic colorectal cancer
-No evidence of efficacy as single agent
Rituximab target
-Binds CD20 in normal B lymphocytes and immature pre-B cells -> inhibiting B-cell proliferation
-CD20 works with B-cell receptor (BCR) to drive proliferation of B-cells
Rituximab indication
B-cell lymphomas (non-Hodgkin’s lymphoma), that target different binding sites on CD20
Daratumumab target
CD38 - a multifunctional transmembrane protein highly expressed on plasma B cells that make antibodies
Daratumumab indication
Multiple myeloma - cancer of malignant plasma cells
Ipilimumab target
CTLA-4 receptor - reverses cytotoxic T lymphocyte inhibition caused by CTLA-4 receptor allowing it to destroy tumor cells
Ipilimumab drug class
Recombinant human mAB
Ipilimumab indication
Approved for treatment of advanced metastatic melanoma
Ipilimumab dose limiting side effect
Severe immune-mediated adverse effects (inflammatory response)
Ipilimumab synergetic drugs
May require high dose corticosteroids to combat inflammatory response
Pembrolizumab target
Binds PD-1 receptor expressed on T-cells and blocks interaction with PD-L1 and PD-L2 -> blockade of PD-1 prevents inhibitory signaling within T-cells leading to enhanced tumor cell killing
Pembrolizumab drug class
mAB
Pembrolizumab indication
-Approved for the treatment of advanced metastatic melanoma following treatment with ipilimumab and a BRAF inhibitor (if BRAF positive)
-Approved for NSCLC if positive for PD-L1
Pembrolizumab genetic testing
PDL1 test for treatment of NSCLC
Atezolizumab target
Binds PD-L1 receptor (expressed on macrophages and tumor cells) - blocking interaction with PD-1 on T-cells leading to enhanced tumor killing
Atezolizumab drug class
PD-L1 mAB
Trastuzumab emtansine target
-Trastuzumab: HER2/Neu receptor
-Emtansine: inhibits microtubule assembly
Trastuzumab emtansine drug class
-ADC
-Emtansine = cytotoxic agent; microtubule destabilizer
Trastuzumab emtansine indication
Approved for second line treatment for HER2-positive metastatic breast cancer
Trastuzumab emtansine dose limiting side effect
-Trastuzumab adverse effects
-Thrombocytopenia
-Hepatotoxicity
Trastuzumab emtansine drug interactions
Emtansine toxicity significantly reduced because of selective HER2 targeting
Trastuzumab emtansine genetic testing
HER2
Bilnatumomab target
Binds to CD3 and brings activated T-cell into proximity of CD19
Bilnatumomab drug class
Bispecific T-cell engager
Bilnatumomab indication
Non-Hodgkin lymphomas
Mosunetuzumab target
CD3 and CD20
Mosunetuzumab drug class
Bispecific T-cell engager
Mosunetuzumab dose limiting side effect
Cytokine release syndrome - when immune system responds too aggressively
Teclistamab target
CD3 on T-cells and B-cell maturation antigen (BCMA) of multiple myeloma cells
Teclistamab drug class
Bispecific T-cell engager
Taquetamab target
CD3 on T-cells and GPRC5D on multiple myeloma cells
Teclistamab drug class
Bispecific T-cell engager
Sipuleucel-T target
Antigen presenting cells (APCs) activated by ex vivo treatment with PAP-GM-CSF - stimulates patients own immune system to attack cancer
Sipuleucel-T drug class
PAP-GM-CSF
Sipuleucel-T indication
Minimally symptomatic metastatic hormone refractory prostate cancer
Sipuleucel-T dose limiting factor
-Mostly limited to flu-like symptoms
-Possible increased risk of stroke
CAR-T target
T-cell activation using CD19 as the target
CAR-T drug class
Chimeric antigen receptor (CAR) T cells
CAR-T indication
B-cell leukemia
Olaparib target
PARP trapping to DNA
Olaparib drug class
Poly ADP ribose polymerase (PARP) inhibitor
Olaparib indication
Cancers with BRCA1/2 mutations
Olaparib genetic testing
BRCA1/2 + PARP inhibitor = synthetic lethality
Palbociclib target
Cdk4/6
Palbociclib drug class
-Kinase inhibitor - targets kinases directly involved with cell cycle control
-Targets ALL replicating cells
Palbociclib cell cycle phase
G1
Palbociclib indication
Cancers arising due to BRCA mutations
Palbociclib dose limiting side effect
-Neutropenia
-Nausea
-Fatigue
-Diarrhea
-Vomiting
Palbociclib genetic testing
BRCA1/2
Bortemzomib target
26S proteasome = ubiquitin-proteasome pathway important for regulation of intracellular proteins
Bortemzomib drug class
Proteasome inhibitor - blocks ubiquitination-disrupts homeostasis causing cell death
Bortemzomib indication
Multiple myeloma (B-cell malignancy)
5-azacytidine target
DNA and DNMT enzymes - part of DNA methylation
5-azacytidine drug class
DNMT inhibitor - blocks DNA methylation - causes reactivation of tumor suppressor genes
5-azacytidine indication
Myelodysplastic syndrome
Venetoclax target
BCL-2; anti-apoptotic protein
Venetoclax drug class
-BCL-2 inhibitor
-First FDA approved small molecule that inhibits a protein-protein interaction
Venetoclax indication
Chronic lymphocytic leukemia
Venetoclax drug interactions
-Combination with 5-azacitidine for AML
-PGP substrate
-CYP3A4
Pomalidomide target
Binds Cereblon to induce it to ubiquitinate and degrade IKZF TFs that are important in lymphocyte development and regulate cell survival
Pomalidomide drug class
Thalidomide analog - anti-angiogenic activity
Pomalidomide indication
Multiple myeloma and Kaposi sarcoma
What does every patient need when on Pomalidomide?
Patients must be signed up for the REMS program