Week 5- Oncology (pt 3) Flashcards
Major chemotherapeutic agents that induce binding within DNA strands and prevent DNA function and replication
Alkylating agents
Major chemotherapeutic agents that are structurally similar to endogenous metabolites and compete with these compounds during DNA/RNA biosynthesis
Antimetabolites
Primary mechanisms of antimetabolites
(1) Mimic the active ingredients or (2) other constituents needed for DNA synthesis and replication
True or false: Antibiotics are incorporated into the DNA strand between base pairs
True
Antibiotics may also induce the formation of _________, leading to DNA strand breakage
Free radicals
Major chemotherapeutic agents that disrupt the normal function of the spindle apparatus (mitotic spindle) and prevent the cell from dividing and proliferating
Antimicrotubule (microtubule-targeting) agents
Major chemotherapeutic agents that disrupt cellular mitosis by bind to the microtubule and inhibit microtubules assembly or disassembly
Antimicrotubule (microtubule-targeting) agents
__________ catalyzes the cutting and re-ligating of DNA strands during the unwinding/rewinding process of DNA replication
Topoisomerase
The ___________ render the cell unable to replicate
Topoisomerase inhibitors
True or false: All forms of cancer are hormone sensitive, because they tend to be exacerbated by certain hormones and attenuated by others
False
(several– not all)
Major chemotherapeutic agents that mimic or block (antagonize) the effects of sex hormones to treat certain hormone-sensitive forms of cancer
Anticancer hormones
Two mechanisms of anticancer hormones
(1) Direct inhibitory effects on cancerous cells or (2) by negative feedback mechanisms that decrease the endogenous hormonal stimulation of the tumor
Also known as heavy metal compounds
Platinum coordination complexes
Major chemotherapeutic agents that form strong cross-links between and within DNA strands, thereby preventing DNA translation and replication
Platinum coordination complexes
True or false: There are agents that bind to targets on or in cancer cells and transmit intracellular signals resulting in cell death, deliver chemotherapeutic agents to the disease site, or prevent cell growth and proliferation
True
Chemotherapeutic agents that stimulate the immune mechanisms by increasing proliferation and activity of immune cellsthat destroyabnormal cell proliferation (cancercells) without harming normal cells
Cytokines
Insidious cancer cells synthesize a glycoprotein that is inserted into the cell’s __________ and effectively ___________ drugs from the cancer
Membrane
Expels
_____________ produce enzymes and specific and specific substances that __________ drugs within the cancer cell
Insidious cancer cells
Inactivate
True or false: Insidious cancer cells develop mechanisms that destroy DNA damaged by drugs
False
(repair… not destroy)
True or false: Insidious cancer modify the structure or function of drug receptors so that the drug is unable to bind to receptor
True
Many agents are ______ and _________
Systemic
Nonspecific
Normal cells most at risk for damage are those that normally have ______________.
High mitotic rates
Antineoplastic drugs typically have a very _____ therapeutic index (TI)
Low
True or false: Some side effects of chemotherapy can be treated with other drugs
True
The most noticeable and distressing adverse effect of chemotherapy
Alopecia
Actively growing hear or hair in the ________ phase is very susceptible to chemo
Anagen
True or false: Hair is not the most rapidly proliferating cell population in the body
False
(it is)
Alopecia typically occurs within 1-3 weeks and is usually _________
Temporary
__________ of hair is 2-3 months after termination of treatment
Regrowth
True or false: Experience with alopecia may vary; ranging from thinning of hair to complete loss of hair, including eyelashes, eyebrows, and body hair
True
True or false: Cells of the oral cavity and GI tract normally divide slowly
False
(quickly– not slowly)
Ulcerations or damage of the mucous cells lining the GI tract
Mucositis
Abdominal pain, bloating, nausea/vomiting, diarrhea, constipation
Mucositis
This side effects occurs 1-2 hours, peaks at 4-10 hours, and lasts 12-24 hours after administration (1-5 days after platinum-based agents)
Chemotherapy-induced nausea (CINV)
The inhibition of bone marrow cells
Myelosuppression
Fewer red cells —> ?
Fewer white cells (leukopenia) —-> ?
Fewer platelets –> ?
Anemia
Infections and fever
Bleeding
Reduced number of neutrophils
Neutropenia
Effects of prolonged neutropenia
-Severe and life threatening infections
-Fungal infections become more likely
-Gram positive bacteria are seen most often
-Gram negative bacteria are the cause of most serious infections, with a higher mortality
Persistent, distressing, subjective sense of physical, emotional, and/or cognitive tiredness related to cancer or cancer treatment that is not relieved by rest and is disproportional with recent activity
Fatigue
True or false: Fatigue interferes with a person’s ability to perform daily tasks and reduce quality of life
True
True or false: Fatigue peaks within a few weeks after therapy
False
(days– not weeks)
Manifestation of cardiomyopathy
-Heart failure
-Reduced left ventricular ejection fraction
-Arrhythmias
-Myocarditis
-Myocardial ischemia/infarction
-Pericarditis