EXAM ONE Flashcards
What are the two essential features of stem cells?
- Capacity to differentiate into different cell types needed to produce mature blood and immune cells
- Capacity for self renewal ensures stem cell population is maintained over time
Granulocytes are also known as what?
Neutrophils
Segs + Bands
White Blood Cells WBCs have two different phases of development, what are they
- Lymphoid Cell Line
- Myeloid Cell Line
What are the cell types in the Myeloid Cell Line?
- Granulocytes
- Basophils
- Monocytes
- Eosinophils
What cells are the first line defense mechanism in Oncology?
Granulocytes
Define Neutropenia
Neutrophil Count <1500 cells/mm
Accurate assessment of absolute value for Neutropenia is calculated how?
Absolute Neutrophil Count (ANC) /Absolute Granulocyte Count (AGC)
When should chemotherapy be held with concerns of Neutropenia?
Neutrophil Count <1000
Define Neutrophilia
Increased Neutrophil Count, further workup needed to determine cause
What are the possible causes of Neutrophilia?
- Infection
- Corticosteroids
Define Myeloproliferative Disorders
Increase in the number of granulocytes or lymphs, characterized by mutations in bone marrow stem cells
What are the considerations when calculating an ANC/AGC?
- Must have CBC with differential
- What is the total WBC value?
- In differential, what percentage of those WBCs are the neutrophils/granulocytes?
What is the normal value for Platelets?
140,000-440,000 uL
What is Thrombocytopenia?
Decreased platelet count <140,000
List the drugs that can cause Thrombocytopenia and their mechanism
- Chemotherapy: decrease in platelet PRODUCTION
- Heparin/Penicillin: increase in platelet DESTRUCTION
- NSAIDs/ASA: decrease in platelet aggregation FUNCTION
What is Thrombocytosis?
Disorder in which the body produces to many platelets
What 3 qualities MUST be true to proceed with chemotherapy treatment? ALL 3 must be true.
- ANC > 1000 or 1500
- Hgb >8
- Platelets >100,000
What are Oncogenes?
Gas Pedal
What are Tumor Suppressor Genes?
Brakes
List the Steps in Hallmarks of Cancer Cells
- Sustained growth factor signaling
- Cell survival/resisting death
- Overcoming growth inhibition
- Angiogenesis
- Endless replication
- Invasion/Metastasis
- Immune System
- Altered Metabolism
What are the Growth Factor Receptors?
- Receptor Tyrosine Kinase RTKs
- HER2/neu: EGFR-2
- EGFR-1
Mutations of with Growth Factor Receptor leads to constant activation?
Receptor Tyrosine Kinase RTK
What drugs specifically target HER2/neu-EGFR-2, found in breast cancer?
- Trastuzumab
- Lapatinib
What drugs specifically target EGFR-1 found in lung, GI, and stromal cancers?
- Erlotinib
- Lapatinib
- Cetuximab
Mutations in what Growth Factor Receptors can cause what?
Render drugs useless in treatment
What are the Growth Signals?
- VEGFR-2: endothelial cells
- PDGFRB: smooth muscle cells
Downstream Signaling Pathways include what?
- MAPK (Ras/Raf)
- Akt
downstream of growth factor receptors, leading to signaling in the absence of growth factor
Alternative Signaling Pathways include what?
- STAT3
- IGFR
- c-Met
when EGFR and others are blocked, these pathways are unregulated to compensate
Sustained Growth Factor Signaling (HM1) includes growth factor receptors, growth signals, and pathways. What does Cell Survival HM2 include?
- Cell Membrane Changes
- Resistance to Apoptosis
Cell Membrane Changes Blebs include what?
- Degradation of proteins, nucleic acids, and lipids
- Cell lysis
- Release of cell components to be used by other cells
Resistance to Apoptosis can be targeted by Conventional Cytotoxic Anticancer Agents, list the main drug that acts by triggering apoptosis.
Cisplatin
Resistance to Apoptosis can be targeted by Anti-Apoptotic Protein IAP Inhibitors, blocking an anti-apoptosis protein which promotes apoptosis in return, list the drug that acts by this mechanism.
Venetoclax
In HM3: Overcoming Growth Inhibition, what is the main mutated/inactivated gene in 50% of cancers?
Tumor Suppressor Gene P53: transcription factor
What types of anticancer drugs can impact the mutation of P53 that affects cell cycle arrest, DNA repair, and apoptotic cell death?
- Conventional Cytotoxic Anticancer Agents
- CDK Inhibitors (Cell Cycle Blockers)
- P53
HM4: Limitless Replication Potential is concerned with Telomeres and specifically what?
Telomerase: enzyme that adds onto ends of chromosomes — differentiation
A cancer cells becomes UNdifferentiated as it goes through the carcinogenesis pathway, what are elements of UNdifferentiated cells?
- Fast growth
- Non-Uniform morphology
- Unstable genotype
What is a Differentiation Agent that can help trigger a cell to go from an UNdifferentiated state to a Differentiated (normal cell) state?
Vitamin A Derivatives (degibs)
HM5: Sustained Angiogenesis is concerned with tumor growth, therefore, Tumors grow SLOWEST when they are what?
- Little: lack a blood supply
- Large: outgrow their blood supply
HM5 suggests that to treat tumors you need to target both what?
- Blood Vessels with anti-angiogenic agents
- Cancer Cells with cytotoxic/RTKs
Some Cytotoxic Anticancer Drugs have Anti-Angiogenic Activity at lower doses, list those agents.
- Gemcitabine
- Vinblastine
- Docetaxel
- Paclitaxel
List the first Anti-VEGF Drug that can be used in HM5?
Bevacizumab
VEGF Kinase Inhibitors on Endothelial Cells and PDGF Kinase Inhibitors on Smooth Muscle Cells target vessels, list two agents.
- Sunitinib
- Sorafenib
HM6: Invasion and Metastasis, what class can be used to treat by using the immune system to kill metastases?
- CTLA-4 Inhibitors
- PD-1 Inhibitors
HM7: Immune System, what two immune cells are critical to carcinogenesis and act as immune checkpoint proteins that reduce the immunogenicity of tumors?
- CTLA-4
- PD-1
What are the two considerations in HM8: Altered Metabolism?
- Warburg Effect
- Metformin
What is the Warburg Effect?
Cancer cells use glucose breakdown (glycolysis) to produce energy instead of using the mitochondria
What is the role of Metformin in Altered Metabolism of Cancer?
Metformin can induce AMP Kinase which decreases cancer cell use
Alkylating Agents are Traditional Cytotoxic Agents, what is their MOA?
- Bind covalently to the DNA molecule
- Inhibit DNA Synthesis (S Phase)
- Attack ANY diving cell
How do Alkylating Agents bind to the DNA molecule?
Electrophile reacts with basic groups aka DNA and bind to stop cell growth
What was the first Alkylating Agent?
Mechlortheramine
What are the Nitrogen Mustard Alkylating Agents?
- Cyclophosphamide
- Ifosfamide
What are important Alkylating Agents? CCOT?
C: Cisplatin
C: Carboplatin
O: Oxaliplatin
T: Temozolomide
Anti-Tumor Antibodies are Traditional drugs, what is their MOA?
- Act by alkylation or intercalation
- BOTH = inhibition of DNA Synthesis
Anthracyclines are a class of Anti-Tumor Agents, they block Topoisomerase II, list the agents in this class.
- Doxorubicin
- Daunorubicin
- Epirubicin
- Idarubicin
How do Anthracyclines (anti-tumor) agents work specifically?
Intercalators
Bleomycin is an MISC Anti-Tumor Agent, what is its MOA?
DNA Strand Breaks
Bleo = Blow Apart
Antimetabolite Agents are used to decrease DNA Synthesis, what is its MOA?
- Block the biosynthesis or use of normal cellular metabolites
- Remove critical proteins in DNA Replication, being false substrates for DNA synthetic enzymes
Antimetabolites target specific DNA replication proteins, list the agents that are Pyrimidine Analogues that mimic pyrimidines to stop DNA synthesis.
- Fluorouracil 5-FU
- Gemcitabine
- Capecitabine
- Azacitidine
Antimetabolites target specific DNA replication proteins, list the agents that are Purine Analogues that mimic purines to stop DNA synthesis.
- 6-Mercaptopurine
- Vidarabine
- Vladribine
- Fludarabine
What Plant Alkaloid Agents have an MOA of: Arrest cell division by preventing the formation of the mitotic spindle? VIN = Anti-Mitotic
VINCAS
1. Vincristine
2. Vinblastine
3. Vinorelbine
What Plant Alkaloid Agents have an MOA of: Inhibit Topoisomerase II –> DNA during synthesis?
Epipodophyllotoxin
1. Etoposide
What Plant Alkaloid Agents have an MOA of: Inhibit Topoisomerase I - an enzyme responsible for the unwinding DNA synthesis?
Campothecins TECANS
1. Irinotecan
2. Topotecan
What Plant Alkaloid Agents have an MOA of: Stabilize Mircotubules –> block cell division in M Phase?
TAXENES
1. Paclitaxel
2. Docetaxel
What Plant Alkaloid Agents have an MOA of: Microtubule Stabilization?
Ixabepilone
What Plant Alkaloid Agents have an MOA of: Antimicrotubule Agent, binds to and blocks PLUS ends of microtubules?
Eribulin
Anti-Hormone class Anti-Androgen has what MOA?
Inhibit and/or degrade the androgen receptor
List the Anti-Androgen Agents
- Bicalutamide
- Flutamide
- Nilutamide
- Apalutamide
- Enzalutamide
- Abiraterone
Anti-Hormone class Anti-Estrogens has what MOA?
Inhibit and/or degrade the estrogen receptor
List the Anti-Estrogens Agents
- Tamoxifen
- Fulvestrant
Anti-Hormone class Aromatase Inhibitors has what MOA?
Aromatase: rate-limiting step in estrogen synthesis
List the Aromatase Inhibitors Agents
- Anastrozole
- Letrozole
The “CICIB” ending means what?
CDK Inhibitor
The “PARIB” ending means what?
PARIB Inhibitor
What is the MOA of Arsenic Trioxide?
Induces apoptosis through reactive oxygen species
What is the MOA of Pegaspargase/Calasparra-Pegol?
Removes vital amino acid asparagine critical to growth of some tumor cells
What is the MOA of Bacillus Calmette Guerin BCG for bladder cancer?
Vaccine against bovine bacteria that non-specifically enhances system to remove tumor cells
New Agents Palbociclib, Abemacicib, and Ribociclib act how?
CDK4/6 Inhibitors: arrest cells in G1/S Phase, mimics normal CDK inhibitors
New Agents Olaparib, Rucaparib, Niraparib, and Talazoparib act how?
PARP Inhibitors: break DNA strands
What is Aldesleukin?
T-Cell Growth Factor, stimulate formation of TReg, T-Effector, and T-Memory cells
What is the MOA of Interferon Alpha 2A?
- Increase phagocytic activity of macrophages
- Increase cytotoxicity of lymphocytes for target