cancer and anti cancer agents
DESCRIPTION
CANCER and Anti Cancer Agents. MAYA FE NG-DARJUAN, MD-RN. What is CANCER? . What is CANCER ?. Neoplastic disorder that can involve all body organs Cells lose their normal growth-controlling mechanism Growth of cells uncontrolled. How do cells know when to stop growing?. - PowerPoint PPT PresentationTRANSCRIPT
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MAYA FE NG-DARJUAN, MD-RNMAYA FE NG-DARJUAN, MD-RN
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◦Neoplastic disorder that can involve all body organs
◦Cells lose their normal growth-controlling mechanism
◦Growth of cells uncontrolled
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MAYA FE NG-DARJUAN MD-RN
via Contact inhibition Contact inhibition and Suppresor gene Suppresor gene
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MAYA FE NG-DARJUAN MD-RN
Source: Core Curriculum for Oncology Nursing (Itano and Taoka)
CELL CYCLECELL CYCLE
Go – Resting phaseRestriction checkpoint
8hrs or more
6-8 hrs
2-5 hrs
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PARTS OF A CELL
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MAYA FE NG-DARJUAN MD-RN
Source: Core Curriculum for Oncology Nursing (Itano and Taoka)
Normal Cell
DNA Damage
Mutations in the genome of somatic cells
Alteration of genes that regulates apoptosis
Expression of altered gene products
Loss of regulatory gene product
MALIGNANT NEOPLASM
Activation of growth promoting oncogene
Inactivation of cancer suppresssor genes
Acquired (environmental DNA damaging agents)
ChemicalsRadiationviruses
Successful DNA repair
Failure of DNA repair
•Clonal expansion•Additional mutations•Heterogeneity
CARCINOGENESIS
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Clinical Staging◦0: cancer in situ◦1: tumor limited to tissue of origin◦2: limited local spread◦3: extensive local and regional spread◦4: metastasis
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TNM Classification◦Tumor size◦Spread to lymph nodes◦Metastasis
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Reduce or avoid exposure to known or suspected carcinogens
Eat balanced dietExercise regularlyAdequate restHealth examination on a regular basis
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Eliminate, reduce, or change perceptions of stressors and enhance ability to cope
Enjoy consistent periods of relaxation and leisure
Know 7 warning signs of cancerSelf-examinationSeek medical care if cancer is suspected
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Patient may experience fear and anxiety
Clear and repeated explanations may be necessary
Diagnostic plan includes◦Health history (emphasis on risk factors)◦Physical exam◦Specific studies
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Biopsy - involves histologic examination by a pathologist of a piece of tissue
Imaging techniques – CT scan, MRI, UTZ
Laboratory test and tumor markers.
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SURGERYCHEMOTHERAPYRADIOTHERAPYIMMUNOMODULATIONBONE MARROW TRANSPLANT
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Goal is to reduce number of cancer cells in the tumor site(s)◦Directed to cells with high mitotic index
Main problem:Main problem:◦Cancer cells can escape death by Cancer cells can escape death by staying in the Gstaying in the G00 phase phase
◦drug- resistantdrug- resistant
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Cell-cycle Nonspecific (CCNS)◦Alkylating agents - CYCLOPHOSPHAMIDE◦Antitumor antibiotics - DOXORUBICIN◦Hormones - CORTICOSTEROIDS
Cell specific (CCS)◦Antimetabolites – FLOUROURACIL◦Mitotic inhibitors – VINCA ALKALOIDS
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OralIMIVIntracavitaryIntrathecalIntraarterial
Continuous infusion
SubcutaneousTopical
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• causing cross- linking of DNA strands•Cell cycle-nonspecific Cell cycle-nonspecific (CCNS)(CCNS)
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ALKYLATING AGENTS1. Busulfan (myleran)2. Carboplatin (Paraplatin)3. Carnustine ( BCNU)4. Chlorambucil ( Leukeran)5. Cisplatin ( Platinol AQ)6. Cyclophosphamide ( Cytoxan)7. Ifosfamide ( (Ifex)8. Lomustine ( CCNU)9. Melphalan ( Alkeran)10. Streptozocin ( Zanosar)11. Temozolamide ( Temodar)
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• acts like a natural metabolite thus disrupting cancer metabolic processes
• CCS – S phase
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ANTIMETABOLITES1. Capecitabine ( Xeloda)2. Cladribine ( Leustatin)3. Clofarabine ( Clolar)4. Cytarabine Hcl ( Cytosar)5. Fludarabine ( Fludara)6. Fluorouracil ( 5-FU)7. Gemcitabine ( gemzar)8. Mercaptopurine ( 6-MP, Purinethol)9. Methotrexate ( MTX)10. Thiohuanine ( TG, Tabloid)
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• SIDE EFFECTS • same as alkylating agents
• Bone marrow depression• Infection• Bleeding• anemia
• GI disturbance• hemorrhagic cystitis• Skin – stomatitis, alopecia
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MOA: •Block the formation of the mitotic spindle during mitosis, thus inhibiting cell division
•Cell cycle specific agentsCell cycle specific agents
PERIWINKLE PLANT
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PERIWINKLE PLANT
NATURAL PRODUCTS 1. Etoposide ( Ve Pesid) 2. Docetaxel ( Taxoterel) 3. Paclitaxel ( Taxol) 4. Vinblastine sulfate ( Velban)
5. Vincristine sulfate ( Oncovir) 6. Vinorelbine ( Navelbine)
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MOA:•Bind to DNA, inhibiting DNA or RNA synthesis, eventually inhibits protein synthesis, preventing cell replication
• CCNS CCNS
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ANTIBIOTICS1. Daunorubicin ( Cerubidine)2. Doxorubicin ( Adriamycin)3. Epirubicin ( Ellence)4. Idarubicin ( Idamycin)5. Mitomycin C ( Mutamycin)6. Mitoxantrone ( Novantrone)7. Valrubin ( valstar)
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Note: DoxurubicinDoxurubicin is cardiotoxic
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1. CORTICOSTEROIDS – anti-inflammatory
2. HORMONEa. ESTROGEN – retards prostate cancerb. PROGESTINS – retards breast and
uterine cancerc. TAMOXIFEN – synthetic anti-
estrogen,
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DRUG INDICATIONS1. AMIFOSTINE( Ethyol)
Reduce cumulative toxicity associated with repeated administration of CISPLATIN in patients with advanced ovarian cancer
2. DEXRAZOXANE ( Zinecard)
Reduce the incidence and severity of cardiomyopathy associated with DOXORUBICIN in women with metastatic breast cancer.
3. MESNA( Mesnex)
Reduce the incidence of IFOSFAMIDE and CYCLOPHOSPHAMIDE induced hemorrhagic cystitis
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Chemotherapeutic agents cannot distinguish between normal and cancer cells
Body’s response to products of cellular destruction in circulation may cause fatigue, anorexia, and taste alterations
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Acute toxicity ◦Vomiting◦Allergic reactions◦Arrhythmias
Delayed effects◦Mucositis◦Alopecia◦Bone marrow suppression
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Chronic toxicities◦Damage to HeartKidneyLiverLungs
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• SIDE EFFECTS:• Bone marrow depression
• Infection• Bleeding• anemia
• GI disturbance• hemorrhagic cystitis• Skin – stomatitis, alopecia
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• CLIENT TEACHINGS• Take drug in the day – prevent drug accumulation at night
• Excreted in breast milk• Reversible oligospermia – sperm bank
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• CLIENT TEACHINGS• Avoid pregnancy for 3-4 mos• Protective isolation• Good oral hygiene – soft bristled toothbrush
• Recommend wig, head scarf• Low purine diet – organ meats, beans and peas
- alkalinize the urine
• SmalSmall frequent meals
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Drugs usually given in combination◦ synergistic efffects◦ CCNS and CCS combination◦ note: combined side effects also
Carefully calculated according to body weight or body surface area
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Must differentiate between tolerable side effects and toxic side effects
Serious reactions must be reported◦Some toxicities are not reversible
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Administration of antiemetic drugs
Monitor lab results, particularly WBCs, platelet, and RBCs◦Assess for signs of bleeding if platelet count falls below 50,000/μl
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Patient must be told what to expect to decrease anxiety
Encourage discussion of fearsReassure patient that situation is only temporary
Inform patient of supportive care that will be provided
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Risk for leukemias and other secondary malignancies resulting
from therapy
Secondary malignancies have been reported◦Includes breast, ovarian, uterine, thyroid, and lung cancers, fibrosarcomasfibrosarcomas
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1. A client is scheduled to receive doxorubicin (Adriamycin) as part of his treatment for cancer. You note in his medical record that he is taking a calcium channel blocker (e.g., verapamil). As the nurse you will monitor closely the client because:
A. doxorubicin decreases the effectiveness of verapamil.B. doxorubicin increases the toxicity of verapamil.C. calcium channel blockers increase the risk
of cardiac toxicity.D. calcium channel blockers decrease the risk
of cardiac toxicity.
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Answer: C
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Your client is scheduled to receive fluorouracil (5-FU) to treat colon cancer. Which of the following statements made by your client indicates a need for additional teaching about 5-FU?
A. “I should call the physician if I develop signs of infection.”
B. “I should examine my mouth occasionally for soreness or ulceration.”
C. “I should not visit anyone who has the flu or a cold.”
D. “I should use sunscreen when I go outsidoutside during the daylight.”
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Answer: B
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