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Alkylating Agents:
- Cyclophosphamide (nitrogen mustards)
- Carmustine (nitrosureas)
- Procarbazine (methylhydrazine)
- Temozolomide (triazine)
- Cisplatin (Pt coordination complex)
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Antimetabolites
- Methotrexate (folate antagonist)
- 5- fluorouracil (pyrimidine analogs (U,C))
- 6-Mercaptopurine
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Natural products
- Vincristine
- Paclitaxel
- Doxorubicin
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Hormones
Flutamide (antiandrogen)
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Immunomodulator
Aldesleukin
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Monoclonal antibodies
rituximab
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protein tyrosine kinase inhibitors
imatinib
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Cyclophosphamide (nitrogen mustards)
- alkylating agent
MOA: DNA alkylation: mispairing, scission, inter/intrastrand x-linking (two war heads)
Uses: NHL, CLL, AML, Breast, Ovarian
S/E: myelosuppression, hepatic venooclusive disease (inc fibrin); N/V; hemorrhagic cysitis; neurotoxicity; alopecia; pulmonary fibrosis
PK: Requires activation via CYP286
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Carmustine (nitrosureas)
- alkylating agent
MOA: DNA alkylation: mispairing, scission
Uses: Brain, HD, NHL, melanoma
S/E: myelosuppression, hepatic venooclusive disease, pulmonary fibrosis, leukemogenic, renal failure, N/V
PK: Breaks into two pieces, one alkylates DNA, other carbamoylated protein/inactivates AGT (MOR)
MOR: Alkyl guanine transferase (removes alkylat'n>> healthy DNA)
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Procarbazine (methylhydrazine)
- alkylating agent
MOA: methylates DNA; free radical prod>> chromosome damage inhibition of DNA, RNA, and protein synthesis
Uses: HD, NSCLC, Brain (astrocytoma)
S/E: BMS (leukemia, thrombocytopenia), weak MAOI, 2ary leukemia, teratogen, disulfirum effect (octoberfest w/anabuse, tyramine>> N/V HTN, tachycardia, etc
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Temozolomide (triazine)
-alkylating agent
MOA: bioactivated into diazomethane (methilates DNA, guanine)
Uses: brain (astrocytoma), melanoma
- S/E:
- BMS (thrombocytopenia, neutropenia) HA, fatigue
- PK:
- 98% bioavailability, penetrates BBB
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Cisplatin (Pt coordination complex)
- alkylating agent
- MOA:
- DNA adduct formation >> inhibit replication/transcription >> breaks, miscoding (G)
- Uses:
- Testicular, ovarian, cervix, bladder, N/SCLC
- S/E:
- BMS, peripheral neuropathy, ototoxicity, hypersensitivity rxn, nephrotoxicity (dec. w/NS hydration, diuresis, amifostine (protective)
- MOR:
- Loss of mismatch repair (apoptosis trigger)
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Methotrexate (folate antagonist)
- S phase specific
- Antimetabolite
- MOA:
- DHF inhibition (decreases DNA/RNA synthesis)
- Uses:
- ALL, CNS leukemia (IT), GTN--> chorion that surrounds baby, breast, NHL
- S/E:
- Myelosuppression, pneumonitis, mucositis (whole GI), hepatotoxicity, teratogenesis, meningismus (IT-->intrathecally, right into CSF), nephrotoxicity
- PK:
- Dose should be adjusted in those with decreased renal faiulre
- MOR:
- Polyglutanated and stays inside cell, DHFR gene amplification is clinically significant in patients with lung cancer, MRP
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5- Fluorouracil (pyrimidine analogs (U,C))
- S phase specific
- Antimetabolite
- MOA:
- Converted into 5- FDUMP (5-F-deoxyuridine monophosphate) (inhibitor of thymidylate synthase (U>>T); Decreased DNA synthesis
Uses: Colorectal, breast, gastric, pancreatic, esophageal
- S/E:
- N/V/D alopecia, myelosuppression, hand and foot syndrome (selective extravasation on palms/soles, they are RED!!)
- PK:
- people with low levels of dihydropyrimidine dehydrogenase can have very severe toxicity with 5-FU
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6-Mercaptopurine
- Antimetabolite
- MOA:
- converted to 6-thioguanine nucleotides (inc. into DNA/RNA >> cytotoxicity)
- S/E:
- myelosuppression, N/V/D, hepatotoxic
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Vincristine
- MOA:
- bind tubulin and block ability to polymerize into microtubules
- S/E:
- fatal (IT, seizures, coma); alopecia, myelosuppression, neurotoxicity, constipation (damage ANS, peristalsis)
- PK:
- CYP3A4; dec dose 75% for hepatic dysfxn
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Paclitaxel
- MOA:
- Bind microtubules and antagonize disassembly >> arrest in mitosis
- Uses:
- Ovarian, N/SCLC, breast, H/N, KS (kaposi)
- S/E:
- myelosuppression, peripheral neuropathy, mucositis (ulcers), hypersensitivity (50/50 EtOH:Castor oil vehicle)
- PK:
- CYP3A4, hep dysfxn dec. dose 50-75%
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Doxorubicin
- MOA:
- DNA intercalation (>> single/dbl strand breaks); bind topo-II complx (dbl strand breaks); free radical production (esp. in presence of Fe)
- Uses:
- AML; ALL; HD; KS; Breast; Neuroblastoma
- S/E:
- BMS (dose lt'ing); extravasation (tissue necrosis), stomatitis, alopecia, 2ary AML, cardiotoxicity (arrhythmia, CHF, tx = Dexrazoxane (cardioprotect Fe chelator)
- PK:
- CYP3A4; hep dysfxn dec. dose 50%
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Flutamide (antiandrogen)
- Hormone
- MOA:
- Androgen receptor antagonist
Use: Prostate (usually w GnRH analog)
- S/E:
- Nausea (mild); gynecomastia; hot flash; decreased libido, hepatotoxicity
PK: CYP3A4
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Aldesleukin
-immunomodulator
- MOA:
- human recombinant IL-2; $ immune sys (inc. TNF, IL-1, IFNy for inhibiting tumor growth)
- S/E:
- capillary leak syn (hypotension, dec. organ perfusion, edema); infections; BMS (RBC, platelets); mental status changes (irritability, confusion, depression); thyroid fxn impairment, arrhythmias
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Rituximab
- monoclonal antibody
- MOA:
- Fab binds CD20 on B cells, Fc stimulates the immune system for their lysis
- Uses:
- NHL, CLL, RA (b/c of B cells)
- S/E:
- arrhythmias, hypersensitivity rxns (hypotension, bronchospasm, angioedema), HepB infections, tumor lysis syn
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Imatinib
Protein tyrosine kinase inhibitors
- MOA:
- Inhibit TK association w/Bcr-Abl (decreases proliferation, stimulates apoptosis)
- inhibit tyrosine kinase associated w/ EGFR (epidermal growth factor), ∴ ↓ proliferation & stimulates apoptosis
- S/E:
- Edema (periorbital, pulmonary) BMS, hepatotoxicity
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